WO2009032859A1 - Traffic safety arrow systems and methods - Google Patents

Traffic safety arrow systems and methods Download PDF

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Publication number
WO2009032859A1
WO2009032859A1 PCT/US2008/075147 US2008075147W WO2009032859A1 WO 2009032859 A1 WO2009032859 A1 WO 2009032859A1 US 2008075147 W US2008075147 W US 2008075147W WO 2009032859 A1 WO2009032859 A1 WO 2009032859A1
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WO
WIPO (PCT)
Prior art keywords
traffic
display
traffic safety
arrow
leds
Prior art date
Application number
PCT/US2008/075147
Other languages
French (fr)
Inventor
Llewellyn Richard Benn
Original Assignee
Llewellyn Richard Benn
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Llewellyn Richard Benn filed Critical Llewellyn Richard Benn
Publication of WO2009032859A1 publication Critical patent/WO2009032859A1/en

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]

Definitions

  • Traffic warning signs are found in many shapes and forms.
  • arrows that are reflective and/or illuminated may be used to direct traffic.
  • Such arrow systems are typically mounted on the back of a vehicle and may include a trailer.
  • traffic warning signs are often required to prevent traffic from moving down one or more lanes.
  • the lanes to be voided of traffic are typically blocked by traffic cones and/or traffic barrels and traffic diverted to an adjacent lane.
  • traffic arrows and signs are available for controlling traffic.
  • one type of traffic sign has a large illuminated and optionally flashing arrow mounted upon a trailer that may be towed behind a vehicle, such as a pick-up truck.
  • large and visible, such signage has to be delivered to the construction site, setup, and configured for operation. Further, in view of the size of such a sign, its location in relation to the flow of traffic is often restricted.
  • a traffic safety arrow system imparts traffic control information to traffic.
  • the traffic safety arrow system includes a plurality of light emitting diodes (LEDs), an input switch for selecting the information to be displayed, a plurality of solid state switches, each solid state switch connected to one or more of the LEDs, a controller for reading the input switch and controlling the solid state switches to illuminated the LEDs to display the traffic control information, a battery for providing power to the traffic safety arrow system, a voltage controller for generating an operating voltage from the battery to operate the traffic safety arrow system, and an enclosure for housing the LEDs, the input switch, the solid state switches, the controller, the voltage controller and the battery, the enclosure having two slots formed through its lower part to facilitate attachment of the traffic safety arrow system to a traffic barrel.
  • LEDs light emitting diodes
  • a traffic safety method imparts traffic control information to traffic in a construction zone.
  • a traffic barrel is positioned to block traffic flow, the traffic barrel having disposed thereon a traffic safety arrow system.
  • Switches on the traffic safety system are used to select one of a plurality of display sequences. If the switches have changed, a display sequence and a step period are determined, based upon the switches. If the switches have changed, the first step of the display sequence is displayed, and if the switches have not changed, a next step in the display sequence is displayed. The steps of determining and displaying are repeated until the traffic safety arrow system is turned off.
  • a traffic safety arrow system imparts traffic control information to traffic, including means for attaching the traffic safety arrow system to a traffic barrel, means for selecting the traffic control information for display on the traffic safety arrow system, means for displaying the traffic control information, and means for powering the traffic safety arrow system.
  • FIG. 1 is a schematic diagram illustrating one exemplary traffic safety arrow system, in an embodiment.
  • FlG. 2 shows a front view of a traffic safety arrow system, based upon the traffic arrow system of FlG. 1.
  • FIG. 3 is a cross-sectional view of the system of FIG. 2.
  • FIG. 4 shows a conventional traffic barrel of the type used by road construction crews to channel traffic away from an area when road repairs are being made.
  • FIGS. 5A and 5B show rear and front views, respectively, of the system of FIG. 2 mounted to the barrel of FIG. 4.
  • FIG. 6 shows one exemplary light emitting diode (LED) display sequence (A-G) for displaying a running left arrow on the system of FIG. 2.
  • LED light emitting diode
  • FIG. 7 shows one exemplary LED display sequence for displaying a running right arrow on the system of FIG. 2.
  • FIG. 8 shows one exemplary display sequence for displaying bidirectional running arrows on the system of FIG. 2.
  • FIG. 9 shows one exemplary display sequence for displaying a flashing cross on the system of FIG. 2.
  • FIG. 10 shows one exemplary LED layout of fifty-five LEDs that allows the word 'SLOW to be displayed.
  • FIG. 1 1 shows one exemplary display sequence of a flashing 'SLOW sign using the layout of FIG. 10.
  • FIG. 12 shows one exemplary display sequence of a moving left arrow using the layout of FIG. 10.
  • FIG. 13 shows one exemplary display sequence of a moving right arrow using the layout of FIG. 10.
  • FIG. 14 is a flowchart illustrating one exemplary process for displaying traffic safety signals.
  • FIG. 15 shows one exemplary system embodiment, similar to the system embodiment of FIGS. 2 and 3.
  • FIG. 16 shows an exemplary cross-section of the embodiment of FIG. 15.
  • FIGS. 17 and 18 show an alternate embodiment of the traffic safety arrow system of FIG. 2.
  • FIG 19A is a schematic diagiam illustiating one exemplaiy tiaffic safety a ⁇ ow system, in an embodiment
  • FIG 19B shows a fiont view of a tiaffic safety a ⁇ ow system of FIG 19A
  • FIG 20 shows one exemplary LED layout that allows the words ⁇ ROAD CLOSED' to be displayed
  • FIG 21 shows one exemplary LED layout that allows the word 'MERGE' to be displayed
  • FIG 22 shows one exemplary light emitting diode (LED) display sequence (A-B) for displaying a flashing right arrow and the word 'EXIT' to be displayed on the system of FIG 2
  • LED light emitting diode
  • FIG 23 shows one exemplary light emitting diode (LED) display sequence (A-C) for displaying a running phrase 'WORK ZONE AHEAD' to be displayed on the system of FIG 2
  • LED light emitting diode
  • FIG 24 shows one exemplary light emitting diode (LED) display sequence (A-C) for displaying a flashing right arrow and a flashing left arrow and the word 'SIDEWALK CLOSED" to be displayed on the system of FIG 2
  • LED light emitting diode
  • FIG 25 shows one exemplary light emitting diode (LED) display sequence (A-C) for displaying a running phrase 'POLICE CHECK POINT' and stationary arrows to be displayed on the system of FIG 2
  • LED light emitting diode
  • FIG 26 shows one exemplary light emitting diode (LED) display sequence (A-C) for displaying a phrase 'SPEED LIMIT 20 MPH' to be displayed on the system of FIG 2
  • LED light emitting diode
  • FIG 27 shows one exemplary repi esentation of a walking pedestrian sign to be displayed on the system of FIG 2
  • FIG 28 shows a tripod capable of displaying the system of FIG 2
  • FIGS 29A and 29B show rear and front views, respectively, of the system of FIG 2 mounted to a t ⁇ pod
  • FIGS 30A, 30B, 30C and 30D show an exemplary layout of LEDs formed to display a double headed arrow, a cross, a left arrow, and a right arrow, in an embodiment.
  • FlG. 31 shows one exemplary set of buttons for controlling the traffic safety arrow systems of FIGS. 1 and 2.
  • FIG. 32 shows an exemplary remote control 3200 for controlling operation of a traffic arrow system (e.g., system 100, FIG. 1 , and system 200. FIG. 2) from a remote location.
  • a traffic arrow system e.g., system 100, FIG. 1 , and system 200. FIG. 2
  • FIG. 33 shows an exemplary remote control device 3300 for controlling a traffic safety arrow system (e.g., system 100, FIG. 1 , system 200, FIG. 2, system 1900, FIG. 19A, and system 1950, FIG. 19B).
  • a traffic safety arrow system e.g., system 100, FIG. 1 , system 200, FIG. 2, system 1900, FIG. 19A, and system 1950, FIG. 19B.
  • FIG. 34 shows one exemplary display of the traffic safety arrow systems of FIGS. 1 and 2.
  • FIG. 35 shows exemplary frames of the display of FIG. 34.
  • FIG. 1 is a block diagram illustrating an exemplary traffic safety arrow system 100.
  • System 100 has a controller 102, a plurality of solid state switches 104, a plurality of high intensity light emitting diodes (LEDs) 106, a voltage controller 108, a rechargeable battery 1 10, a solar panel 112 and a plurality of switches 1 14.
  • Rechargeable battery 1 10 is connected to voltage controller 108 that operates to charge battery 1 10 from power received from solar panel 1 12 and to condition power received from solar panel 1 12 and/or battery 1 10 for use by other components of system 100, such as controller 102, solid state switches 104, and LEDs 106.
  • voltage controller 108 generates one voltage for controller 102 and a second voltage for solid state switches 104 and LEDs 106. Even when system 100 is turned off, voltage controller 108 may operate to charge rechargeable battery 110 when sufficient solar radiation is incident upon solar panel 1 12. Controller 102 receives input from switches 1 14 to select one or more display sequences 120 stored within a memory 1 18 of controller 102. Memory 118 may be external to controller 102 without departing from the scope hereof. Based upon the selected display sequence 120, controller 102 outputs one or more control signals 103 to solid state switches 104. Each solid state switch 104 is operable to drive one or more LEDs 106 to emit light. Controller 102 thereby controls illumination of LEDs 106 via solid state switches 104 and control signals 103. For example, controller 102 uses control
  • a chargei 1 16 may be used to charge batteiy 1 10 fiom an alternate power source, such as a household powei outlet oi a vehicle 12 ⁇ olt outlet
  • chargei 1 16 is a separate unit that connects to batteiy 1 10 via an external connector
  • Each solid state switch 104 may include one oi more tiansistors for controlling current to one or more LEDs 106
  • FIG 2 shows a front view of a traffic safety arrow system 200
  • System 200 is based upon system 100 of FIG 1 and is shown within an enclosure 202 that is mountable upon a traffic barrel or other such traffic controlling device
  • Enclosure 202 may be waterproof and configured with a plastic screen at the font that is transparent to light emitted by LEDs 106
  • LEDs 106 may be mounted upon a printed circuit board withm enclosure 202
  • certain of LEDs 106 may be arranged in the shape of a double headed arrow 206
  • Some such LEDs 106 are gieen and shown to be marked with a "G" m FlG 2 Othei LEDs 106 emit red light when activated and aie arranged in the form of a cross 208, and each of these LEDs 106 aie shown to be marked with the letter "R " LED 106C is shown to be located within double headed a ⁇ ow 206, and within cross 208, and may be selected as a green emitting LED or a red emitting LED as is
  • Enclosure 202 has two mounting holes 204(1) and 204(2) that facilitate mounting of enclosure 202 to a traffic barrel as shown in FIGS 3 A and 3B
  • Mounting holes 204 are elongated in a ho ⁇ zontal direction to accommodate a wide
  • Enclosure 202 is also shown with a batteiy dooi 210 on one end that facilitates installation and lemoval of batteiy 1 10
  • Door 210 may be designed to maintain the wateipioof integrity of enclosuie 202
  • Door 210 may be attached by one or more screws, or by a keyed fit and latch mechanism, to enclosure 202
  • Solai panel 112 is shown mounted on the top of enclosure 202
  • solar panel 1 12 forms a lid of enclosure 202 to maintain waterpioof integrity of enclosure 202
  • Solar panel 1 12 may be designed and sized to provide sufficient power to maintain operation of system 200 over an extended pe ⁇ od That is, system 200 may operate from solar power alone
  • a socket 220 is incorporated into enclosure 202 to facilitate charging of rechargeable battery 1 10
  • Charger 1 16 is, for example, incorporated within enclosure 202 and socket 220 to allow connection of a 1 1 OV AC power supply to chargei 1 16
  • charger 116 may be designed to connect to a 1 1 OV AC power source and connect to rechargeable battery 1 16 via a plug that mates with socket 220
  • a watertight plug may also be included with socket 220 to maintain waterproof integrity of enclosuie 202 when rechaigeable battery 1 10 is not being charged
  • FIG 3 is a cross-sectional view 300 as seen through cross section A-A of system 200, shown in FIG 2
  • FIG 3 shows enclosure 102 and solar panel 112 forming a waterproof volume containing battery 110 and a circuit board 302
  • Circuit board 302 is populated with LEDs 106 (shown with LED 106C) and other components 304 that represent electrical components of one or more of controller 102, solid state switches 104, and voltage controller 108 of system 100, FIG 1
  • FIG 4 shows a conventional traffic barrel 402 of the type used by road construction crews to channel traffic away from an area when road repairs are being made
  • barrel 402 has a handle 404 for carrying barrel 402 and two mounting holes 406(1) and 406(2) that facilitate mounting of traffic beacons (not
  • Barrel 402 may include one or more reflective bands and is typically bright orange in color.
  • FIGS. 5A and 5B show rear and front views, respectively, of system 200, FlG. 2, mounted to barrel 402, FIG. 4, by two non-metal (e.g., nylon or other plastic material) bolts 502(1 ), 502(2) and two non-metal (e.g., nylon or other plastic material) nuts 504(1) and 504(2).
  • Bolt 502(1 ) passes through slot 204(1) of system 200, hole 406(1) of barrel 402 and is secured by nut 504(1).
  • bolt 502(2) passes through slot 204(2) of system 200, hole 406(2) of barrel 402 and is secured by nut 504(2).
  • Slots 204 of system 200 facilitate attachment of system 200 to barrels and other units with varying mounting hole positions.
  • FIG. 6 shows one exemplary LED 106 display sequence 600 (A-G) for displaying a running left arrow on system 200, FIG. 2.
  • FIG. 7 shown one exemplary LED 106 display sequence 700 (A-G) for displaying a running right arrow on system 200.
  • Display sequences 600 and 700 may each represent one of display sequences 120, FIG. 1. Each sequence 600 and 700 repeats until a different display is selected or system 200 is turned off. In one example of operation, a user turns on system 200 and selects the running left arrow using switches 1 14.
  • Controller 102 controls solid state switches 104 to illuminate the appropriate LEDs 106 for each step (A-G) of sequence 600, each step lasting for half a second, for example.
  • FIG. 8 shows one exemplary display sequence 800 (A-D) for displaying bi-directional running arrows on system 200.
  • Display sequences 800 may represent one of display sequences 120, FIG. 1. Sequence A-D may repeat until a different display is selected or system 200 is switched off. In one example of operation, the user selects bi-directional running arrows and turns system 200 on using switches 1 14. Controller 102 controls solid state switches 104 to illuminate the appropriate LEDs 106 for each step (A-D) of sequence 800, each step lasting for half a second, for example.
  • FIG. 9 shows one exemplary display sequence 900 (A-B) for displaying a flashing cross on system 200.
  • Display sequences 900 may represent one of display sequences 120, FIG. 1. Sequence A-B may repeat until a different display is selected or system 200 is switched off. In one example of operation, the user selects flashing cross and turns system 200 on using switches 114. Controller 102 controls
  • controller 102 may control solid state switches 104, using a pulse width modulation technique, to control the brightness of LEDs 106 when illuminated.
  • system 200 may include a light sensor that is used by controller 102 to determine ambient lighting levels and also thereby control the brightness at which LEDs 106 are illuminated. At night, LEDs 106 may be illuminated to a lower level as compared to a daytime illumination level, thereby reducing power drain from battery 110 at night when no solar energy is available.
  • FIG. 10 shows one exemplary LED layout 1000 of fifty-five LEDs 1006 that display the word "SLOW" while maintaining the aforementioned features of system 200.
  • layout 1000 has fifty-five LEDs (36 more than the example shown in FIG. 2) that provide functionality of system 200 and its display with additional clarity, as described hereinbelow.
  • fourteen LEDs 1006 are not illuminated when displaying the word "SLOW.”
  • FIG. 1 1 shows one exemplary display sequence 1 100 (A-B) for displaying a flashing "SLOW" sign.
  • Display sequences 1 100 may represent one of display sequences 120, FIG. 1.
  • Each step of sequence 1 100 may be displayed for a defined period (e.g., half of one second), the sequence repeating until an alternate display sequence 120 is selected or system 200 is turned off.
  • controller 102 operates to fade the word "SLOW" in and out rather than having a step change.
  • FIG. 12 shows one exemplary display sequence 1200 (A-B) for displaying a moving left arrow.
  • FIG. 13 shows one exemplary display sequence 1300 (A-B) for displaying a moving right arrow.
  • Display sequences 1200 and 1300 may each represent one of display sequences 120, FIG. 1.
  • FIG. 14 is a flowchart illustrating one exemplary process 1400 for displaying traffic safety signals.
  • Process 1400 is for example implemented by or within controller 102 of system 100, FIG. 1.
  • step 1402 process 1400 leads switches to determine the selected display selection In one example of step 1402, contiollei 102 ieads switches 1 14 to determine which of display sequences 120 is selected Step 1404 is a decision It in step 1404, process 1400 determines that the display selection has changed horn the previous execution of step 1402, process 1400 continues with step 1406, otheiwise process 1400 continues with step 1410
  • step 1406 process 1400 determines the LED illumination sequence and the step period based upon the display selection determined in step 1402 In one example of step 1406, controller 102 reads a selected display sequence 120 from memoiy 118 and determines a suitable step pe ⁇ od In step 1408, process 1400 selects the first step of the determined sequence In one example of step 1408, controller 102 selects step A of display sequence 600, FIG 6, where display sequence 600 has been selected in step 1402 Process 1400 then continues from step 1408 to step 1412
  • step 1410 process 1400 selects a next step of the current sequence
  • conti oiler 102 selects step A of display sequence 1200, FIG 12, where step B is the current step
  • step 1412 process 1400 determines which LEDs 106 (or 1006) may be illuminated for the selected step
  • controller 102 determines that LEDs 106(X), 106(Y) and 106(Z) of LEDs 106 are to be illuminated in step C of display sequence 600
  • step 1414 process 1400 illuminated these determined LEDs
  • controller 102 generates one of more signals 103 to activate one or more solid state switches 104 to illuminate LEDs 106(X), 106(Y) and 106(Z)
  • step 1416 process 1400 extinguishes LEDs determined not to be illuminated
  • controller 102 deactivates certain of signals 103 to turn off certain solid state switches connected to LEDs 106 that are not to be illuminated
  • process 1400 waits for the determined step pe ⁇ od before proceeding with step 1402
  • controller 102 sets an internal timer to awaken the controller after a defined pe ⁇
  • Steps 1402- 1418 repeat until system 200 is turned off
  • FIG 15 and FIG 16 show one exemplaiy system embodiment 1500 that is similai to system embodiment 200 ot FIGS 2 and 3, except that, in this example, system 1500 is not ahown to include a solai panel oi a iechaigeable batteiy System 1500 may include a consumable battery 1610 that may be replaced, thiough use of battery door 210, when exhausted Batteiy 1610 may be formed from a pluiahty of consumable cells, such as alkali D-cells, thereby making battery replacement convenient
  • FIGS 17 and 18 show a side view and a rear view, respectively, of an alternate system 1600 embodiment of tiaffic safety arrow system 200 of FIG 2
  • the solar panel may be sized to be the same as the top surface of the enclosure
  • system 1600 is similar to system 200, except that solar panel 1 16 may be designed to not extend beyond the edges of enclosure 202
  • enclosure 202 may be sized accordingly
  • FIG 19A is a block diagram illustrating one exemplary traffic safety arrow system 1900
  • system 1900 is similar to system 100 of FIG 1 , but may have an alternate display format
  • System 1900 has a controller 1902, a matrix d ⁇ vei 1904, a matrix based display 1906, a voltage controller 1908, a rechargeable batteiy 1910, a solai panel 1912, and a plurality of switches 1914
  • Rechargeable battery 1910 is connected to voltage controller 1908 that operates to charge battery 1910 from power received from solar panel 1912, and to condition power received fiom solar panel 1912 and/or battery 1910 for use by other components of system 1900, such as controllei 1902, matrix d ⁇ ver 1904, and display 1906
  • voltage controller 1908 generates one voltage for controller 1902 and a second voltage for matrix d ⁇ ver 1904 and display 1906 Even when system 1900 is turned off, voltage controller 1908 may operate to charge rechargeable battery 1910 when sufficient solar radiation is incident upon solar panel 1912 Controller 1902 receives input from switches 1914 to select one
  • Controller 1902 may thereby control illumination of display 1906 via matrix driver 1904 and control signals 1903.
  • controller 1902 uses control signal 1903 to control matrix driver 1904 to operate one or more elements of display 1906.
  • controller 1902 utilizes control signal 1903 to operate matrix driver 1904 to control brightness of light output by display 1906 by utilizing a pulse width modulation technique (known in the art) to vary intensity (of time) of active elements of display 1906.
  • the control of light output levels i.e., brightness
  • a charger 1916 may be used to charge battery 1910 from an alternate power source, such as a household power outlet or a vehicle 12 volt outlet.
  • charger 1916 is a separate unit that connects to battery 1910 via an external connector.
  • Matrix driver 1904 may include one or more of transistors (e.g., similar to solid state switches 104 of system 100, FIG 1), field-programmable gate arrays (FPGAs), and other current control devices, for controlling current to activate one or more display elements of display 1906 under control of controller 1902.
  • transistors e.g., similar to solid state switches 104 of system 100, FIG 1
  • FPGAs field-programmable gate arrays
  • other current control devices for controlling current to activate one or more display elements of display 1906 under control of controller 1902.
  • system 1900 may include one or more sensors 1932 to sense ambient conditions, such as ambient light levels.
  • Controller 1902 may receive ambient light information from sensor 1932 and thereby determine a desired brightness of display 1906.
  • Display 1906 is shown as an array 1930 of light emitting elements 1936, and may include two or more same or different sized arrays without departing from the scope hereof.
  • the size of the one or more arrays 1930 and type of light emitting elements 1936 may be selected based upon a specific application of traffic safety arrow 1900.
  • array 1930 represents an organic light emitting diode (OLED) device having a plurality of OLED elements formed as an array.
  • OLED organic light emitting diode
  • display 1906 has a large number of light emitting elements, these elements may be grouped to provide a reduced number of logical light emitting elements to facilitate control of display 1906.
  • higher resolution character and graphic displays maybe generated by display 1906. For example, the
  • BLDRDOCS 1 1 1531 v5 Docket 484477 use of OLED based displays may allow system 1900 to display highly legible instructions foi moto ⁇ sts and pedestrians
  • FIG 19B shows a fiont ⁇ iew of a tiaffic safety anow system 1950 that is based upon system 1900 of FIG 19A. and is shown within an enclosme 1952 that is mountable upon a tiaffic barrel or other such tiaffic controlling device Enclosure 1952 may be waterproof and configured with a plastic screen at the tiont that is transparent to light emitted by display 1906
  • Display 1906 is, for example, mounted upon a printed circuit board withm enclosure 1952.
  • display 1906 is formed as array 1930 having 23 columns by 11 rows of light emitting elements 1936
  • Switches 1914 are shown mounted within enclosure 1952 such that they are operable from the front face of enclosure 1952 Switches 1914 are shown as two groups or units 1914(1) and 1914(2) However, more or fewer units, each with one or more switches, may be used without departing from the scope hereof Switches 1914 may also be waterproof, thereby maintaining the waterproof integrity of enclosuie 1952 Switches 1914 may be selected as one or more of toggle, push-button, slide, recessed, etc
  • Enclosme 1952 has two mounting holes 1954(1) and 1954(2) that facilitate mounting of enclosme 1952 to a tiaffic ban el (similar to the mounting of enclosure 202 of FIGS 3 A and 3B).
  • Mounting holes 1954 are elongated in a horizontal direction to accommodate a wide range of mounting widths
  • Mounting holes 1954 may be, in effect, watertight tubes that pass through enclosure 1952 thereby maintaining the waterproof integrity of enclosure 1952.
  • Enclosure 1952 is also shown with a battery door 1960 on one end that facilitates installation and removal of battery 1910.
  • Door 1960 may be designed to maintain the waterproof integrity of enclosure 1952.
  • Door 1960 may be attached by one or more screws, or by a keyed fit and latch mechanism, to enclosure 1952
  • Solar panel 1912 is shown mounted on the top of enclosure 1952 In one example, solar panel 1912 forms a hd of enclosure 1952 to maintain waterproof integrity of enclosure 1952. Solar panel 1912 may be designed and sized to provide sufficient power to maintain operation of system 9100 over an extended period. That is, system 1900 may operate from solar power alone.
  • a socket 1970 is incorporated into enclosure 1952 to facilitate charging of rechargeable battery 1910.
  • Charger 1916 is for example incorporated within enclosure 1952 and socket 1970 to allow connection of a 1 10V AC power supply to charger 1916.
  • charger 1916 may be designed to connect to a 1 1 OV AC power source and connect to rechargeable battery 1916 via a plug that mates with socket 1970.
  • a watertight plug may also be included with socket 1970 to maintain waterproof integrity of enclosure 1952 when rechargeable battery 1910 is not being charged.
  • display 1906 has sufficient resolution (i.e., sufficient columns and rows of light emitting elements) to display all exemplary frames of FIGS. 20 - 30.
  • one or more displays 1906 are configured to display only a selection of frames of FIGS. 20- 30.
  • display 1906 is animated in that a sequence of frames are displayed at predetermined time intervals to allow more information to be imparted to drivers and pedestrians than can be shown at any one time on display 1906.
  • FIG. 20 shows one exemplary frame 2000 of display 1906 implemented with an array of rectangular light emitting elements having 27 columns by 19 rows and forming the text "ROAD CLOSED. " '
  • illuminated light emitting elements 2002 intermittently flash off and on heighten awareness of the displayed information.
  • FIG. 21 shows another exemplary frame 2100 of display 1906 implemented with an array of light emitting elements (e.g., array 1930, FIGS. 19A, 19B) having 27 columns by 19 rows and forming the word "MERGE" and showing an arrow 2130.
  • arrow 2130 may be flashing to attract the attention of approaching drivers.
  • FIG. 22 shows two exemplary frames 2200A and 2200B of a display sequence by an array of light emitting elements (e.g., array 1930, FIGS. 19A, 19B) having 22 columns by 17 rows that are selectively illuminated to form the word "EXIT" and a moving right arrow 2230. Only two frames, of a possible 22 frame sequence (e.g., arrow 2230 moving one pixel to the right in each successive frame and
  • anow 2230 may be static, oi may be intermittently displayed (i e , flashing) to attiact the attention oi appioachmg dnveis and pedest ⁇ ans
  • FIG 23 shows three exemplaiy frames 2300A, 2300B, and 2300C of a display sequence by an an ay of light emitting elements (e g , array 1930, FIGS 19A, 19B) having 24 columns by 15 rows and forming the words "WORK ZONE AHEAD " Only three frames of a possible eight frame sequence of vertical scrolling text are shown Frames 2300A and 2300C are mam frames of the sequence and may display for a longer duration than intermediate frames (e g , frame 2300B) For example, the duration between frames may be controlled by controller 1902 to meet traffic control regulations and for optimum viewing In an alternate embodiment, only frames 2300A and 2300C are displayed (i e , animated smooth scrolling is not performed) alternately for an appropriate amount of time
  • FIG 24 shows one exemplary frame 2400 for display on an array of light emitting elements having 36 columns by 25 rows selectively illuminated to display the words "SIDEWALK CLOSED" and arrows 2402 and 2404 Airows 2402 and 2404 may be omitted, or when displayed, may be intermittently activated (i e , flashed)
  • FIG 25 shows three exemplaiy frames 2500A, 2500B, and 2500C of a possible eight-frame display sequence for display on an array of light emitting element having 26 column by 13 row, selectively illuminated to display the vertically scrolling words "POLICE CHECK POINT" and a stationaiy left arrow 2502 That is, left arrow 2502 remains stationary while the displayed text scrolls
  • FIG 26 shows one exemplary frame 2600 for display on an array of light emitting elements having 16 columns by 26 rows of selectively illuminated to display the words "SPEED LIMIT" and the number twenty
  • the speed limit may be selected through use of switches 1914 (e g , a thumbwheel switch allowing the selection of the speed limit in 5 value intervals) once the speed limit display is selected
  • FIG 27 shows one exemplary frame 2700 for display on an array of light emitting elements having 30 columns by 29 rows that are selectively
  • Arrow 2704 and/or walking man 2702 may be intermittently displayed (i.e., flashing).
  • FIG. 28 shows one exemplary tripod 2800 and adapter 2810 for mounting system 100, 200, 1900, and/or 1950 for operation where a traffic barrel is not available.
  • tripod 2800 and adapter 2810 may be used to mount system 100, 200, 1900, and/or 1950 such that LEDs 106 (of systems 100, 200) or display 1906 (of systems 1900, 1950) are visible to approaching motorists (e.g., at road repairs, police check points, and so on).
  • adapter 2810 may have two mounting holes 2830(1) and 2830(2) that facilitate mounting of traffic beacons (not shown) to tripod 2700.
  • the tripod 2700 contains a mounting neck 2740 that supports the mounting plate 2710 and may rotate to display the traffic beacons (not shown) at differing positions.
  • Tripod 2700 also contains legs 2750 that may fold to permit ease of transportation of tripod.
  • FIGS. 29A and 29B show exemplary rear and front views, respectively, of system 200, FIG. 2, mounted to tripod 2800 via adapter 2810, FIG. 28, by two non-metal (e.g., nylon or other plastic material) bolts 2902(1), 2902(2) and two non-metal (e.g., nylon or other plastic material) nuts 2904(1) and 2904(2).
  • bolt 2902(1) passes through slot 204(1) of system 200, hole 2830(1) of adapter 2810, and is secured by nut 2904(1).
  • bolt 2902(2) may pass through slot 204(2) of system 200, hole 2830(2) of adapter 2810, and is secured by nut 2904(2).
  • Adapter 2810 is secured to tripod 2800.
  • FIGS. 30A, 30B, 30C, and 30D each show an exemplary layout 3000 of ninety-nine LEDs 3022 that may display a double headed arrow 3002, a cross 3004, a left arrow 3006, and/or a right arrow 3008.
  • Layout 3000 may replace the LEDs 106 of system 200, FIG. 2.
  • the use of more LEDs 3022 in layout 3000 enhances the displayed information (e.g., double headed arrow 3002, cross 3004, left arrow 3006 and right arrow 3008), thereby making the displayed information more intelligible to approaching drivers and pedestrians.
  • FIG 31 shows one exemplary set 3100 of buttons 3114 for controlling a traffic safety arrow system (e.g., system 100, FIG. 1, system 200, FIG. 2).
  • Set 3100 allows a user to turn the traffic safety arrow system off and on using button 3114(1), and once on, select display of the word "slow” using button 3114(2),
  • buttons 31 14(2)-31 14(6) may have additional functionality, such as selecting a flashing mode when piessed a second time oi held down Similaily, button 31 14(1) may cycle through display brightness options with each press, one of which designating "off "
  • FlG 32 shows one exemplaiy remote control 3200 for controlling operation of a traffic arrow system (e g , system 100, FIG 1 and system 200, FIG 2) from a remote location
  • Remote control 3200 is illustrated with buttons 3214 that provide similai control to button 31 14 of FIG 31
  • Remote control 3200 is shown with an "on/off button 3214(1), a "slow” selection button 3214(2), a left arrow selection button 3214(3), a right arrow selection button 3214(4), a double arrow selection button 3214(5), and a cross selection button 3214(6)
  • Buttons 3214 may have similar additional functionality to button 31 14 of FIG 31
  • Remote control 3200 is also shown with a sci een 3202 through which an mfra-red control signal is tiansmitted when one or more of buttons 3214 is piessed
  • sensor 132 of system 100 detects the mfra-red signal transmitted by i emote control 3200 and controller 102 decodes the received signal to determine which button
  • FIG 33 shows one exemplaiy remote control device 3300 for controlling a traffic safety arrow system (e g , system 100, FIG 1, system 200 FIG 2, system 1900, FIG 19A, and/or system 1950, FIG 19B)
  • Remote control 3300 may operate in a similar mannei to remote control 3200, FIG 32, and is shown with a screen 3302 through which an mfra-red control signal is transmitted when one or more of buttons 3314 is pressed
  • sensor 132 of system 100 detects the mfra-red signal transmitted by remote control 3300 and controllei 102 decodes the received signal to determine which button is being depressed on remote control 3300
  • BLDRDOCS 1 1 1531 v5 Docket 484477 and takes the appiop ⁇ ate action Similaily.
  • sensor 1932 of system 1900 detects the mha-ied signal tiansmitted by i emote contiol 3300 and contiollei 1902 decodes the leceived signal to deteimine which button is being depiessed on i emote contiol 3300 and takes the appiop ⁇ ate action
  • the traffic safety anow system e g , system 1900, system 1950
  • Remote control 3300 is shown with a power button 3314(1) foi powering the traffic safety arrow system on and off, thiee exemplary preset display selection buttons speed display (e g , frame 2600, FIG 26) selection button 3314(2), pedestrian display (e g , walking man frame 2700 of FIG 27) selection button 3314(4), and double anow display (e g , layout 3000, FIG 30A) selection button 3314(5)
  • Remote control 3300 is also shown with an illumination intensity selection button 3314(3) that may be used to control the intensity of display 1906, a slow flash selection button 3314(6), and a fast flash selection button 3314(7)
  • Remote control 3300 is also shown with an alpha-numeric keypad 3306 for enteimg user selected messages for display on the traffic safety arrow system
  • Remote control 3300 may include othei buttons 3314 that facilitate control of the traffic safety arrow system
  • remote contiol 330 is shown with navigation contiols 3304 (including an "entei " button) that allows a usei scioll through menu selections displayed on the tiaffic safety arrow system (e g , displayed on display 1906 of system 1900) That is, display 1906 and navigation controls 3304 of remote control 3300 allow a user to interact with traffic safety arrow system 1900 to select operation of the traffic safety arrow system by selecting one or more displayed menu options
  • remote control 3300 includes an accept button 3314(8) and a cancel button 3314(9) that allows the user to accept and cancel, respectively, entered changes to the traffic safety arrow system
  • a usei programs the phrase "SPEED LIMIT 20" into traffic safety arrow system 1900 using the alpha-nume ⁇ c keypad 3306, navigation controls 3304, and accept button 3314(8) of remote control 3300
  • remote control 3300 emits a radio frequency signal when one or more of buttons 3314 are depressed, and sensor 1932 represents a radio frequency receiver such that controller 1902 may decode the signal transmitted from remote control 3300
  • buttons 3314 of i emote contiol 3300 aie also disposed on the body of the tiatfic safety a ⁇ ow system (e g , as buttons 1914 on enclosuie 1952 oi tiaffic safety anow system 1950, FIG 19B)
  • buttons 3314 of i emote contiol 3300 aie also disposed on the body of the tiatfic safety a ⁇ ow system (e g , as buttons 1914 on enclosuie 1952 oi tiaffic safety anow system 1950, FIG 19B)
  • buttons may be implemented on the ieai or sides of enclosuie 1952
  • FlG 34 shows one exemplary display 3406 of the traffic safety arrow systems of FIGS 1 and 2, the display having a plurality of illuminated segments
  • display 3406 has forty-five shaped segments 3402 that may be selectively illuminated to form the previously described displays of traffic safety arrow systems 100 and 200, FIGS 1 and 2, respectively
  • Each shaped segment 3402 may be illuminated by one or more LEDs, or othei light sources, and may include light channeling and/or diffusing materials Display 3406 may thus have improved clarity over bare, or simply lensed, LED displays
  • FIG 35 shows exemplary frames 3500, 3520, 3540, and 3560 of display 3406, FIG 34
  • frame 3500 shows selective elements illuminate to display the word "SLOW"
  • Frame 3520 shows two left arrows that may be independently flashed to show motion
  • frame 3540 shows two right left a ⁇ ows that may be independently flashed to show motion
  • Frame 3560 shows an "X"

Abstract

Traffic safety systems and method impart traffic control information to traffic in a construction zone. The traffic safety arrow system includes a plurality of light emitting diodes (LEDs), an input switch for selecting the information to be displayed, a plurality of solid state switches, each solid state switch connected to one or more of the LEDs, a controller for reading the input switch and controlling the solid state switches to illuminated the LEDs to display the traffic control information, a battery for providing power to the traffic safety arrow system, a voltage controller for generating an operating voltage from the battery to operate the traffic safety arrow system, and an enclosure having at least two slots formed through its lower part to facilitate attachment of the traffic safety arrow system to a traffic barrel or a tripod.

Description

Docket No.: 484477
TRAFFIC SAFETY ARROW SYSTEMS AND METHODS
RELATED APPLICATIONS
[0001] This application claims priority to US Provisional Application Serial Number 60/969,797, filed September 4, 2007, which is incorporated herein by reference.
BACKGROUND
[0002] Traffic warning signs are found in many shapes and forms. For example, arrows that are reflective and/or illuminated may be used to direct traffic. Such arrow systems are typically mounted on the back of a vehicle and may include a trailer. Where construction is being performed upon or near a busy highway, traffic warning signs are often required to prevent traffic from moving down one or more lanes. The lanes to be voided of traffic are typically blocked by traffic cones and/or traffic barrels and traffic diverted to an adjacent lane. Several traffic arrows and signs are available for controlling traffic. For example, one type of traffic sign has a large illuminated and optionally flashing arrow mounted upon a trailer that may be towed behind a vehicle, such as a pick-up truck. Although large and visible, such signage has to be delivered to the construction site, setup, and configured for operation. Further, in view of the size of such a sign, its location in relation to the flow of traffic is often restricted.
[0003] For example, where a single lane of traffic is closed on a multi-lane highway, the closed lane is often blocked by traffic barrels to force vehicles to use an adjacent lane. However, approaching vehicles often fail to recognize the lane closure and available options for switching lanes, thereby posing a risk to construction workers and other vehicles. This problem is particularly acute where more than one lane is closed and the number of traffic barrels and traffic cones used is large. A driver in a low vehicle, for example, may be unable to conceptualize the lane closure and determine which way he is expected to turn.
BLDRDOCS 1 1 1531 v5 Docket: 484477
SUMMARY
[0004] In an embodiment, a traffic safety arrow system imparts traffic control information to traffic. The traffic safety arrow system includes a plurality of light emitting diodes (LEDs), an input switch for selecting the information to be displayed, a plurality of solid state switches, each solid state switch connected to one or more of the LEDs, a controller for reading the input switch and controlling the solid state switches to illuminated the LEDs to display the traffic control information, a battery for providing power to the traffic safety arrow system, a voltage controller for generating an operating voltage from the battery to operate the traffic safety arrow system, and an enclosure for housing the LEDs, the input switch, the solid state switches, the controller, the voltage controller and the battery, the enclosure having two slots formed through its lower part to facilitate attachment of the traffic safety arrow system to a traffic barrel.
[0005] In another embodiment, a traffic safety method imparts traffic control information to traffic in a construction zone. A traffic barrel is positioned to block traffic flow, the traffic barrel having disposed thereon a traffic safety arrow system. Switches on the traffic safety system are used to select one of a plurality of display sequences. If the switches have changed, a display sequence and a step period are determined, based upon the switches. If the switches have changed, the first step of the display sequence is displayed, and if the switches have not changed, a next step in the display sequence is displayed. The steps of determining and displaying are repeated until the traffic safety arrow system is turned off.
[0006] In another embodiment, a traffic safety arrow system imparts traffic control information to traffic, including means for attaching the traffic safety arrow system to a traffic barrel, means for selecting the traffic control information for display on the traffic safety arrow system, means for displaying the traffic control information, and means for powering the traffic safety arrow system.
BRIEF DESCRIPTION OF THE FIGURES
[0007] FIG. 1 is a schematic diagram illustrating one exemplary traffic safety arrow system, in an embodiment.
BLDRDOCS 1 1 1531 v5 Docket: 484477
[0008] FlG. 2 shows a front view of a traffic safety arrow system, based upon the traffic arrow system of FlG. 1.
[0009J FlG. 3 is a cross-sectional view of the system of FIG. 2.
[0010] FIG. 4 shows a conventional traffic barrel of the type used by road construction crews to channel traffic away from an area when road repairs are being made.
[0011] FIGS. 5A and 5B show rear and front views, respectively, of the system of FIG. 2 mounted to the barrel of FIG. 4.
[0012] FIG. 6 shows one exemplary light emitting diode (LED) display sequence (A-G) for displaying a running left arrow on the system of FIG. 2.
[0013] FIG. 7 shows one exemplary LED display sequence for displaying a running right arrow on the system of FIG. 2.
[0014] FIG. 8 shows one exemplary display sequence for displaying bidirectional running arrows on the system of FIG. 2.
[0015] FIG. 9 shows one exemplary display sequence for displaying a flashing cross on the system of FIG. 2.
[0016] FIG. 10 shows one exemplary LED layout of fifty-five LEDs that allows the word 'SLOW to be displayed.
[0017] FIG. 1 1 shows one exemplary display sequence of a flashing 'SLOW sign using the layout of FIG. 10.
[0018] FIG. 12 shows one exemplary display sequence of a moving left arrow using the layout of FIG. 10.
[0019] FIG. 13 shows one exemplary display sequence of a moving right arrow using the layout of FIG. 10.
[0020] FIG. 14 is a flowchart illustrating one exemplary process for displaying traffic safety signals.
[0021] FIG. 15 shows one exemplary system embodiment, similar to the system embodiment of FIGS. 2 and 3.
[0022] FIG. 16 shows an exemplary cross-section of the embodiment of FIG. 15.
[0023] FIGS. 17 and 18 show an alternate embodiment of the traffic safety arrow system of FIG. 2.
3
BLDRDOCS 1 1 1531 v5 Docket 484477
10024] FIG 19A is a schematic diagiam illustiating one exemplaiy tiaffic safety aπow system, in an embodiment
[0025J FIG 19B shows a fiont view of a tiaffic safety aπow system of FIG 19A
|0026] FIG 20 shows one exemplary LED layout that allows the words ■ROAD CLOSED' to be displayed
[0027] FIG 21 shows one exemplary LED layout that allows the word 'MERGE' to be displayed
[0028] FIG 22 shows one exemplary light emitting diode (LED) display sequence (A-B) for displaying a flashing right arrow and the word 'EXIT' to be displayed on the system of FIG 2
[0029] FIG 23 shows one exemplary light emitting diode (LED) display sequence (A-C) for displaying a running phrase 'WORK ZONE AHEAD' to be displayed on the system of FIG 2
[0030] FIG 24 shows one exemplary light emitting diode (LED) display sequence (A-C) for displaying a flashing right arrow and a flashing left arrow and the word 'SIDEWALK CLOSED" to be displayed on the system of FIG 2
[0031] FIG 25 shows one exemplary light emitting diode (LED) display sequence (A-C) for displaying a running phrase 'POLICE CHECK POINT' and stationary arrows to be displayed on the system of FIG 2
[0032] FIG 26 shows one exemplary light emitting diode (LED) display sequence (A-C) for displaying a phrase 'SPEED LIMIT 20 MPH' to be displayed on the system of FIG 2
[0033] FIG 27 shows one exemplary repi esentation of a walking pedestrian sign to be displayed on the system of FIG 2
[0034] FIG 28 shows a tripod capable of displaying the system of FIG 2
[0035] FIGS 29A and 29B show rear and front views, respectively, of the system of FIG 2 mounted to a tπpod
[0036] FIGS 30A, 30B, 30C and 30D show an exemplary layout of LEDs formed to display a double headed arrow, a cross, a left arrow, and a right arrow, in an embodiment.
BLDRDOCS 1 1 1531 v5 Docket: 484477
[0037] FlG. 31 shows one exemplary set of buttons for controlling the traffic safety arrow systems of FIGS. 1 and 2.
[0038] FIG. 32 shows an exemplary remote control 3200 for controlling operation of a traffic arrow system (e.g., system 100, FIG. 1 , and system 200. FIG. 2) from a remote location.
[0039] FIG. 33 shows an exemplary remote control device 3300 for controlling a traffic safety arrow system (e.g., system 100, FIG. 1 , system 200, FIG. 2, system 1900, FIG. 19A, and system 1950, FIG. 19B).
[0040] FIG. 34 shows one exemplary display of the traffic safety arrow systems of FIGS. 1 and 2.
[0041] FIG. 35 shows exemplary frames of the display of FIG. 34.
DETAILED DESCRIPTION OF THE FIGURES
[0042] FIG. 1 is a block diagram illustrating an exemplary traffic safety arrow system 100. System 100 has a controller 102, a plurality of solid state switches 104, a plurality of high intensity light emitting diodes (LEDs) 106, a voltage controller 108, a rechargeable battery 1 10, a solar panel 112 and a plurality of switches 1 14. Rechargeable battery 1 10 is connected to voltage controller 108 that operates to charge battery 1 10 from power received from solar panel 1 12 and to condition power received from solar panel 1 12 and/or battery 1 10 for use by other components of system 100, such as controller 102, solid state switches 104, and LEDs 106. In one embodiment, voltage controller 108 generates one voltage for controller 102 and a second voltage for solid state switches 104 and LEDs 106. Even when system 100 is turned off, voltage controller 108 may operate to charge rechargeable battery 110 when sufficient solar radiation is incident upon solar panel 1 12. Controller 102 receives input from switches 1 14 to select one or more display sequences 120 stored within a memory 1 18 of controller 102. Memory 118 may be external to controller 102 without departing from the scope hereof. Based upon the selected display sequence 120, controller 102 outputs one or more control signals 103 to solid state switches 104. Each solid state switch 104 is operable to drive one or more LEDs 106 to emit light. Controller 102 thereby controls illumination of LEDs 106 via solid state switches 104 and control signals 103. For example, controller 102 uses control
BLDRDOCS 1 1 1531 v5 Docket 484477 signal 103(1 ) to contiol solid state switch 104(1 ) to opeiate one oi moie LEDs 106 connected to solid state switch 104(1 )
[0043] Optionally, a chargei 1 16 may be used to charge batteiy 1 10 fiom an alternate power source, such as a household powei outlet oi a vehicle 12 \olt outlet In one embodiment, chargei 1 16 is a separate unit that connects to batteiy 1 10 via an external connector
[0044] Each solid state switch 104 may include one oi more tiansistors for controlling current to one or more LEDs 106
[0045] FIG 2 shows a front view of a traffic safety arrow system 200 System 200 is based upon system 100 of FIG 1 and is shown within an enclosure 202 that is mountable upon a traffic barrel or other such traffic controlling device Enclosure 202 may be waterproof and configured with a plastic screen at the font that is transparent to light emitted by LEDs 106 LEDs 106 may be mounted upon a printed circuit board withm enclosure 202 As shown, certain of LEDs 106 may be arranged in the shape of a double headed arrow 206 Some such LEDs 106 are gieen and shown to be marked with a "G" m FlG 2 Othei LEDs 106 emit red light when activated and aie arranged in the form of a cross 208, and each of these LEDs 106 aie shown to be marked with the letter "R " LED 106C is shown to be located within double headed aπow 206, and within cross 208, and may be selected as a green emitting LED or a red emitting LED as is shown Optionally, LED 106C may be selected as a bicoloi LED that is capable of emitting both gieen and red light undei control of controller 102 Switches 1 14 are shown mounted withm enclosure 202 such that they are operable from the front face of enclosure 202 Switches 114 aie shown as two groups or units 114(1) and 114(2) However, more or less units, each with one or more switches, may be used without departing from the scope heieof See exemplary switches 3100 of FIG 31 , for example Switches 1 14 may also be waterproof, thereby maintaining the waterproof integrity of enclosure 202 Switches 114 may be selected as one or more of toggle, push-button, slide, recessed, etc
[0046] Enclosure 202 has two mounting holes 204(1) and 204(2) that facilitate mounting of enclosure 202 to a traffic barrel as shown in FIGS 3 A and 3B Mounting holes 204 are elongated in a hoπzontal direction to accommodate a wide
BLDRDOCS 1 1 1531 v5 Docket 484477 iange of mounting widths Mounting holes 204 aie in effect watei tight tubes that pass thiough enclosuie 202 theieby maintaining the wateipioof mtegπty of enclosure 202
|0047] Enclosure 202 is also shown with a batteiy dooi 210 on one end that facilitates installation and lemoval of batteiy 1 10 Door 210 may be designed to maintain the wateipioof integrity of enclosuie 202 Door 210 may be attached by one or more screws, or by a keyed fit and latch mechanism, to enclosure 202
[0048] Solai panel 112 is shown mounted on the top of enclosure 202 In one example, solar panel 1 12 forms a lid of enclosure 202 to maintain waterpioof integrity of enclosure 202 Solar panel 1 12 may be designed and sized to provide sufficient power to maintain operation of system 200 over an extended peπod That is, system 200 may operate from solar power alone
[0049] In an alternate embodiment, a socket 220 is incorporated into enclosure 202 to facilitate charging of rechargeable battery 1 10 Charger 1 16 is, for example, incorporated within enclosure 202 and socket 220 to allow connection of a 1 1 OV AC power supply to chargei 1 16 Alternatively, charger 116 may be designed to connect to a 1 1 OV AC power source and connect to rechargeable battery 1 16 via a plug that mates with socket 220
[0050] A watertight plug may also be included with socket 220 to maintain waterproof integrity of enclosuie 202 when rechaigeable battery 1 10 is not being charged
[0051] FIG 3 is a cross-sectional view 300 as seen through cross section A-A of system 200, shown in FIG 2 In particular, FIG 3 shows enclosure 102 and solar panel 112 forming a waterproof volume containing battery 110 and a circuit board 302 Circuit board 302 is populated with LEDs 106 (shown with LED 106C) and other components 304 that represent electrical components of one or more of controller 102, solid state switches 104, and voltage controller 108 of system 100, FIG 1
[0052] FIG 4 shows a conventional traffic barrel 402 of the type used by road construction crews to channel traffic away from an area when road repairs are being made In particular, barrel 402 has a handle 404 for carrying barrel 402 and two mounting holes 406(1) and 406(2) that facilitate mounting of traffic beacons (not
BLDRDOCS 1 1 1531 v5 Docket: 484477 shown) to barrel 402. Barrel 402 may include one or more reflective bands and is typically bright orange in color.
[0053] FIGS. 5A and 5B show rear and front views, respectively, of system 200, FlG. 2, mounted to barrel 402, FIG. 4, by two non-metal (e.g., nylon or other plastic material) bolts 502(1 ), 502(2) and two non-metal (e.g., nylon or other plastic material) nuts 504(1) and 504(2). Bolt 502(1 ) passes through slot 204(1) of system 200, hole 406(1) of barrel 402 and is secured by nut 504(1). Similarly, bolt 502(2) passes through slot 204(2) of system 200, hole 406(2) of barrel 402 and is secured by nut 504(2). Slots 204 of system 200 facilitate attachment of system 200 to barrels and other units with varying mounting hole positions.
[0054] FIG. 6 shows one exemplary LED 106 display sequence 600 (A-G) for displaying a running left arrow on system 200, FIG. 2. FIG. 7 shown one exemplary LED 106 display sequence 700 (A-G) for displaying a running right arrow on system 200. Display sequences 600 and 700 may each represent one of display sequences 120, FIG. 1. Each sequence 600 and 700 repeats until a different display is selected or system 200 is turned off. In one example of operation, a user turns on system 200 and selects the running left arrow using switches 1 14. Controller 102 controls solid state switches 104 to illuminate the appropriate LEDs 106 for each step (A-G) of sequence 600, each step lasting for half a second, for example.
[0055] FIG. 8 shows one exemplary display sequence 800 (A-D) for displaying bi-directional running arrows on system 200. Display sequences 800 may represent one of display sequences 120, FIG. 1. Sequence A-D may repeat until a different display is selected or system 200 is switched off. In one example of operation, the user selects bi-directional running arrows and turns system 200 on using switches 1 14. Controller 102 controls solid state switches 104 to illuminate the appropriate LEDs 106 for each step (A-D) of sequence 800, each step lasting for half a second, for example.
[0056] FIG. 9 shows one exemplary display sequence 900 (A-B) for displaying a flashing cross on system 200. Display sequences 900 may represent one of display sequences 120, FIG. 1. Sequence A-B may repeat until a different display is selected or system 200 is switched off. In one example of operation, the user selects flashing cross and turns system 200 on using switches 114. Controller 102 controls
8
BLDRDOCS 1 1 1531v5 Docket: 484477 solid state switches 104 to illuminate the appropriate LEDs 106 for each step (A-B) of sequence 900, each step lasting for half a second, for example.
[0057] The duration between steps of each sequence 600, 700, 800 and 900 may also be configured to meet traffic control regulations. Further, controller 102 may control solid state switches 104, using a pulse width modulation technique, to control the brightness of LEDs 106 when illuminated. Optionally, system 200 may include a light sensor that is used by controller 102 to determine ambient lighting levels and also thereby control the brightness at which LEDs 106 are illuminated. At night, LEDs 106 may be illuminated to a lower level as compared to a daytime illumination level, thereby reducing power drain from battery 110 at night when no solar energy is available.
[0058] In an alternate embodiment of system 200, FIG. 10 shows one exemplary LED layout 1000 of fifty-five LEDs 1006 that display the word "SLOW" while maintaining the aforementioned features of system 200. In particular, layout 1000 has fifty-five LEDs (36 more than the example shown in FIG. 2) that provide functionality of system 200 and its display with additional clarity, as described hereinbelow. In the example of FIG. 10, fourteen LEDs 1006 are not illuminated when displaying the word "SLOW."
[0059] FIG. 1 1 shows one exemplary display sequence 1 100 (A-B) for displaying a flashing "SLOW" sign. Display sequences 1 100 may represent one of display sequences 120, FIG. 1. Each step of sequence 1 100 may be displayed for a defined period (e.g., half of one second), the sequence repeating until an alternate display sequence 120 is selected or system 200 is turned off. In one embodiment, controller 102 operates to fade the word "SLOW" in and out rather than having a step change.
[0060] FIG. 12 shows one exemplary display sequence 1200 (A-B) for displaying a moving left arrow. Similarly, FIG. 13 shows one exemplary display sequence 1300 (A-B) for displaying a moving right arrow. Display sequences 1200 and 1300 may each represent one of display sequences 120, FIG. 1.
[0061] FIG. 14 is a flowchart illustrating one exemplary process 1400 for displaying traffic safety signals. Process 1400 is for example implemented by or within controller 102 of system 100, FIG. 1.
9
BLDRDOCS 1 1 1531 v5 Docket 484477
|0062] In step 1402, process 1400 leads switches to determine the selected display selection In one example of step 1402, contiollei 102 ieads switches 1 14 to determine which of display sequences 120 is selected Step 1404 is a decision It in step 1404, process 1400 determines that the display selection has changed horn the previous execution of step 1402, process 1400 continues with step 1406, otheiwise process 1400 continues with step 1410
[0063] In step 1406, process 1400 determines the LED illumination sequence and the step period based upon the display selection determined in step 1402 In one example of step 1406, controller 102 reads a selected display sequence 120 from memoiy 118 and determines a suitable step peπod In step 1408, process 1400 selects the first step of the determined sequence In one example of step 1408, controller 102 selects step A of display sequence 600, FIG 6, where display sequence 600 has been selected in step 1402 Process 1400 then continues from step 1408 to step 1412
[0064J In step 1410, process 1400 selects a next step of the current sequence In one example of step 1410, conti oiler 102 selects step A of display sequence 1200, FIG 12, where step B is the current step
[0065] In step 1412, process 1400 determines which LEDs 106 (or 1006) may be illuminated for the selected step In one example of step 1412, controller 102 determines that LEDs 106(X), 106(Y) and 106(Z) of LEDs 106 are to be illuminated in step C of display sequence 600 In step 1414, process 1400 illuminated these determined LEDs In one example of step 1414, controller 102 generates one of more signals 103 to activate one or more solid state switches 104 to illuminate LEDs 106(X), 106(Y) and 106(Z) In step 1416, process 1400 extinguishes LEDs determined not to be illuminated In one example of step 1416, controller 102 deactivates certain of signals 103 to turn off certain solid state switches connected to LEDs 106 that are not to be illuminated In step 1418, process 1400 waits for the determined step peπod before proceeding with step 1402 In one example of step 1418, controller 102 sets an internal timer to awaken the controller after a defined peπod of the step, and then may put itself to sleep to conserve battery power
[0066] Steps 1402- 1418 repeat until system 200 is turned off
10
BLDRDOCS 1 1 1531 v5 Docket 484477
[0067] FIG 15 and FIG 16 show one exemplaiy system embodiment 1500 that is similai to system embodiment 200 ot FIGS 2 and 3, except that, in this example, system 1500 is not ahown to include a solai panel oi a iechaigeable batteiy System 1500 may include a consumable battery 1610 that may be replaced, thiough use of battery door 210, when exhausted Batteiy 1610 may be formed from a pluiahty of consumable cells, such as alkali D-cells, thereby making battery replacement convenient
[0068] FIGS 17 and 18 show a side view and a rear view, respectively, of an alternate system 1600 embodiment of tiaffic safety arrow system 200 of FIG 2 In this example, the solar panel may be sized to be the same as the top surface of the enclosure In other words, system 1600 is similar to system 200, except that solar panel 1 16 may be designed to not extend beyond the edges of enclosure 202 Conversely, where a certain size is required for solar panel 1 16, enclosure 202 may be sized accordingly
[0069] FIG 19A is a block diagram illustrating one exemplary traffic safety arrow system 1900 In this example, system 1900 is similar to system 100 of FIG 1 , but may have an alternate display format System 1900 has a controller 1902, a matrix dπvei 1904, a matrix based display 1906, a voltage controller 1908, a rechargeable batteiy 1910, a solai panel 1912, and a plurality of switches 1914 Rechargeable battery 1910 is connected to voltage controller 1908 that operates to charge battery 1910 from power received from solar panel 1912, and to condition power received fiom solar panel 1912 and/or battery 1910 for use by other components of system 1900, such as controllei 1902, matrix dπver 1904, and display 1906 In one embodiment, voltage controller 1908 generates one voltage for controller 1902 and a second voltage for matrix dπver 1904 and display 1906 Even when system 1900 is turned off, voltage controller 1908 may operate to charge rechargeable battery 1910 when sufficient solar radiation is incident upon solar panel 1912 Controller 1902 receives input from switches 1914 to select one or more display sequences 1920 stored within a memory 1918 of controller 1902 Memory 1918 may be external to controller 1902 without departing from the scope hereof Based upon the selected display sequence 1920, controller 1902 outputs one or more control signals 1903 to matrix dπver 1904 Matrix dπver 1904 is operable to dπve one or
11
BLDRDOCS 1 1 1531 v5 Docket: 484477 more elements of display 1906 to emit light. Controller 1902 may thereby control illumination of display 1906 via matrix driver 1904 and control signals 1903. For example, controller 1902 uses control signal 1903 to control matrix driver 1904 to operate one or more elements of display 1906. In one example, controller 1902 utilizes control signal 1903 to operate matrix driver 1904 to control brightness of light output by display 1906 by utilizing a pulse width modulation technique (known in the art) to vary intensity (of time) of active elements of display 1906. The control of light output levels (i.e., brightness) may reduce power requirements for operation of system 1900, thereby extending its operational duration.
[0070] Optionally, a charger 1916 may be used to charge battery 1910 from an alternate power source, such as a household power outlet or a vehicle 12 volt outlet. In one embodiment, charger 1916 is a separate unit that connects to battery 1910 via an external connector.
[0071] Matrix driver 1904 may include one or more of transistors (e.g., similar to solid state switches 104 of system 100, FIG 1), field-programmable gate arrays (FPGAs), and other current control devices, for controlling current to activate one or more display elements of display 1906 under control of controller 1902.
[0072] Optionally, system 1900 may include one or more sensors 1932 to sense ambient conditions, such as ambient light levels. Controller 1902 may receive ambient light information from sensor 1932 and thereby determine a desired brightness of display 1906.
[0073] Display 1906 is shown as an array 1930 of light emitting elements 1936, and may include two or more same or different sized arrays without departing from the scope hereof. In particular, the size of the one or more arrays 1930 and type of light emitting elements 1936 may be selected based upon a specific application of traffic safety arrow 1900. In one embodiment, array 1930 represents an organic light emitting diode (OLED) device having a plurality of OLED elements formed as an array. Where display 1906 has a large number of light emitting elements, these elements may be grouped to provide a reduced number of logical light emitting elements to facilitate control of display 1906. Alternatively, higher resolution character and graphic displays maybe generated by display 1906. For example, the
12
BLDRDOCS 1 1 1531 v5 Docket 484477 use of OLED based displays may allow system 1900 to display highly legible instructions foi motoπsts and pedestrians
|0074] FIG 19B shows a fiont \ iew of a tiaffic safety anow system 1950 that is based upon system 1900 of FIG 19A. and is shown within an enclosme 1952 that is mountable upon a tiaffic barrel or other such tiaffic controlling device Enclosure 1952 may be waterproof and configured with a plastic screen at the tiont that is transparent to light emitted by display 1906 Display 1906 is, for example, mounted upon a printed circuit board withm enclosure 1952. As shown in FIG. 19B, display 1906 is formed as array 1930 having 23 columns by 11 rows of light emitting elements 1936
[0075] Switches 1914 are shown mounted within enclosure 1952 such that they are operable from the front face of enclosure 1952 Switches 1914 are shown as two groups or units 1914(1) and 1914(2) However, more or fewer units, each with one or more switches, may be used without departing from the scope hereof Switches 1914 may also be waterproof, thereby maintaining the waterproof integrity of enclosuie 1952 Switches 1914 may be selected as one or more of toggle, push-button, slide, recessed, etc
[0076] Enclosme 1952 has two mounting holes 1954(1) and 1954(2) that facilitate mounting of enclosme 1952 to a tiaffic ban el (similar to the mounting of enclosure 202 of FIGS 3 A and 3B). Mounting holes 1954 are elongated in a horizontal direction to accommodate a wide range of mounting widths Mounting holes 1954 may be, in effect, watertight tubes that pass through enclosure 1952 thereby maintaining the waterproof integrity of enclosure 1952.
[0077] Enclosure 1952 is also shown with a battery door 1960 on one end that facilitates installation and removal of battery 1910. Door 1960 may be designed to maintain the waterproof integrity of enclosure 1952. Door 1960 may be attached by one or more screws, or by a keyed fit and latch mechanism, to enclosure 1952
[0078] Solar panel 1912 is shown mounted on the top of enclosure 1952 In one example, solar panel 1912 forms a hd of enclosure 1952 to maintain waterproof integrity of enclosure 1952. Solar panel 1912 may be designed and sized to provide sufficient power to maintain operation of system 9100 over an extended period. That is, system 1900 may operate from solar power alone.
13
BLDRDOCS 1 1 1531 v5 Docket: 484477
[0079] In an alternate embodiment, a socket 1970 is incorporated into enclosure 1952 to facilitate charging of rechargeable battery 1910. Charger 1916 is for example incorporated within enclosure 1952 and socket 1970 to allow connection of a 1 10V AC power supply to charger 1916. Alternatively, charger 1916 may be designed to connect to a 1 1 OV AC power source and connect to rechargeable battery 1916 via a plug that mates with socket 1970.
|0080] A watertight plug may also be included with socket 1970 to maintain waterproof integrity of enclosure 1952 when rechargeable battery 1910 is not being charged.
[0081] Exemplary configurations for display 1906 of systems 1900 and 1950 are shown in certain of the following figures. In an embodiment, display 1906 has sufficient resolution (i.e., sufficient columns and rows of light emitting elements) to display all exemplary frames of FIGS. 20 - 30. In alternate embodiments, one or more displays 1906 are configured to display only a selection of frames of FIGS. 20- 30. In certain embodiments, display 1906 is animated in that a sequence of frames are displayed at predetermined time intervals to allow more information to be imparted to drivers and pedestrians than can be shown at any one time on display 1906.
[0082] FIG. 20 shows one exemplary frame 2000 of display 1906 implemented with an array of rectangular light emitting elements having 27 columns by 19 rows and forming the text "ROAD CLOSED."' In an embodiment, illuminated light emitting elements 2002 intermittently flash off and on heighten awareness of the displayed information.
[0083] FIG. 21 shows another exemplary frame 2100 of display 1906 implemented with an array of light emitting elements (e.g., array 1930, FIGS. 19A, 19B) having 27 columns by 19 rows and forming the word "MERGE" and showing an arrow 2130. In one embodiment, arrow 2130 may be flashing to attract the attention of approaching drivers.
[0084] FIG. 22 shows two exemplary frames 2200A and 2200B of a display sequence by an array of light emitting elements (e.g., array 1930, FIGS. 19A, 19B) having 22 columns by 17 rows that are selectively illuminated to form the word "EXIT" and a moving right arrow 2230. Only two frames, of a possible 22 frame sequence (e.g., arrow 2230 moving one pixel to the right in each successive frame and
14
BLDRDOCS 1 1 1531v5 Docket 484477 wiappmg to ieappeai on the left side of the display) aie shown m this example Alternately anow 2230 may be static, oi may be intermittently displayed (i e , flashing) to attiact the attention oi appioachmg dnveis and pedestπans
[0085] FIG 23 shows three exemplaiy frames 2300A, 2300B, and 2300C of a display sequence by an an ay of light emitting elements (e g , array 1930, FIGS 19A, 19B) having 24 columns by 15 rows and forming the words "WORK ZONE AHEAD " Only three frames of a possible eight frame sequence of vertical scrolling text are shown Frames 2300A and 2300C are mam frames of the sequence and may display for a longer duration than intermediate frames (e g , frame 2300B) For example, the duration between frames may be controlled by controller 1902 to meet traffic control regulations and for optimum viewing In an alternate embodiment, only frames 2300A and 2300C are displayed (i e , animated smooth scrolling is not performed) alternately for an appropriate amount of time
[0086] FIG 24 shows one exemplary frame 2400 for display on an array of light emitting elements having 36 columns by 25 rows selectively illuminated to display the words "SIDEWALK CLOSED" and arrows 2402 and 2404 Airows 2402 and 2404 may be omitted, or when displayed, may be intermittently activated (i e , flashed)
[0087] FIG 25 shows three exemplaiy frames 2500A, 2500B, and 2500C of a possible eight-frame display sequence for display on an array of light emitting element having 26 column by 13 row, selectively illuminated to display the vertically scrolling words "POLICE CHECK POINT" and a stationaiy left arrow 2502 That is, left arrow 2502 remains stationary while the displayed text scrolls
[0088] FIG 26 shows one exemplary frame 2600 for display on an array of light emitting elements having 16 columns by 26 rows of selectively illuminated to display the words "SPEED LIMIT" and the number twenty In an embodiment, the speed limit may be selected through use of switches 1914 (e g , a thumbwheel switch allowing the selection of the speed limit in 5 value intervals) once the speed limit display is selected
[0089] FIG 27 shows one exemplary frame 2700 for display on an array of light emitting elements having 30 columns by 29 rows that are selectively
15
BLDRDOCS 1 1 1531 v5 Docket: 484477 illuminated to display a walking man 2702 and an arrow 2704. Arrow 2704 and/or walking man 2702 may be intermittently displayed (i.e., flashing).
[0090] FIG. 28 shows one exemplary tripod 2800 and adapter 2810 for mounting system 100, 200, 1900, and/or 1950 for operation where a traffic barrel is not available. For example, tripod 2800 and adapter 2810 may be used to mount system 100, 200, 1900, and/or 1950 such that LEDs 106 (of systems 100, 200) or display 1906 (of systems 1900, 1950) are visible to approaching motorists (e.g., at road repairs, police check points, and so on). In particular, adapter 2810 may have two mounting holes 2830(1) and 2830(2) that facilitate mounting of traffic beacons (not shown) to tripod 2700. The tripod 2700 contains a mounting neck 2740 that supports the mounting plate 2710 and may rotate to display the traffic beacons (not shown) at differing positions. Tripod 2700 also contains legs 2750 that may fold to permit ease of transportation of tripod.
[0091] FIGS. 29A and 29B show exemplary rear and front views, respectively, of system 200, FIG. 2, mounted to tripod 2800 via adapter 2810, FIG. 28, by two non-metal (e.g., nylon or other plastic material) bolts 2902(1), 2902(2) and two non-metal (e.g., nylon or other plastic material) nuts 2904(1) and 2904(2). In this example, bolt 2902(1) passes through slot 204(1) of system 200, hole 2830(1) of adapter 2810, and is secured by nut 2904(1). Similarly, bolt 2902(2) may pass through slot 204(2) of system 200, hole 2830(2) of adapter 2810, and is secured by nut 2904(2). Adapter 2810 is secured to tripod 2800.
[0092] FIGS. 30A, 30B, 30C, and 30D each show an exemplary layout 3000 of ninety-nine LEDs 3022 that may display a double headed arrow 3002, a cross 3004, a left arrow 3006, and/or a right arrow 3008. Layout 3000 may replace the LEDs 106 of system 200, FIG. 2. The use of more LEDs 3022 in layout 3000 enhances the displayed information (e.g., double headed arrow 3002, cross 3004, left arrow 3006 and right arrow 3008), thereby making the displayed information more intelligible to approaching drivers and pedestrians.
[0093] FIG 31 shows one exemplary set 3100 of buttons 3114 for controlling a traffic safety arrow system (e.g., system 100, FIG. 1, system 200, FIG. 2). Set 3100 allows a user to turn the traffic safety arrow system off and on using button 3114(1), and once on, select display of the word "slow" using button 3114(2),
16
BLDRDOCS 1 1 1531 v5 Docket 484477 select display of a left anow using button 31 14(3), select display of a light anow using button 31 14(4), select display of a double anow using button 31 14(5), and select display of a cioss using button 31 14(6) Optionally, buttons 31 14(2)-31 14(6) may have additional functionality, such as selecting a flashing mode when piessed a second time oi held down Similaily, button 31 14(1) may cycle through display brightness options with each press, one of which designating "off "
[0094] FlG 32 shows one exemplaiy remote control 3200 for controlling operation of a traffic arrow system (e g , system 100, FIG 1 and system 200, FIG 2) from a remote location Remote control 3200 is illustrated with buttons 3214 that provide similai control to button 31 14 of FIG 31 Remote control 3200 is shown with an "on/off button 3214(1), a "slow" selection button 3214(2), a left arrow selection button 3214(3), a right arrow selection button 3214(4), a double arrow selection button 3214(5), and a cross selection button 3214(6) Buttons 3214 may have similar additional functionality to button 31 14 of FIG 31 Remote control 3200 is also shown with a sci een 3202 through which an mfra-red control signal is tiansmitted when one or more of buttons 3214 is piessed In an embodiment, sensor 132 of system 100 detects the mfra-red signal transmitted by i emote control 3200 and controller 102 decodes the received signal to determine which button is being depiessed on i emote control 3200 and takes the appropnate action In this embodiment, the traffic safety arrow system (e g , system 100, system 200) may omit one oi more of switches 1 14 In an alternate embodiment, remote control 3200 emits a radio frequency signal when one or more of buttons 3214 are depressed and sensor 132 represents a radio frequency receiver such that controller 102 may decode the signal transmitted from remote control 3200
[0095] FIG 33 shows one exemplaiy remote control device 3300 for controlling a traffic safety arrow system (e g , system 100, FIG 1, system 200 FIG 2, system 1900, FIG 19A, and/or system 1950, FIG 19B) Remote control 3300 may operate in a similar mannei to remote control 3200, FIG 32, and is shown with a screen 3302 through which an mfra-red control signal is transmitted when one or more of buttons 3314 is pressed In an embodiment, sensor 132 of system 100 detects the mfra-red signal transmitted by remote control 3300 and controllei 102 decodes the received signal to determine which button is being depressed on remote control 3300
17
BLDRDOCS 1 1 1531 v5 Docket 484477 and takes the appiopπate action Similaily. sensor 1932 of system 1900 detects the mha-ied signal tiansmitted by i emote contiol 3300 and contiollei 1902 decodes the leceived signal to deteimine which button is being depiessed on i emote contiol 3300 and takes the appiopπate action In this embodiment, the traffic safety anow system (e g , system 1900, system 1950) may omit one or moie of switches 1914
[0096] Remote control 3300 is shown with a power button 3314(1) foi powering the traffic safety arrow system on and off, thiee exemplary preset display selection buttons speed display (e g , frame 2600, FIG 26) selection button 3314(2), pedestrian display (e g , walking man frame 2700 of FIG 27) selection button 3314(4), and double anow display (e g , layout 3000, FIG 30A) selection button 3314(5) Remote control 3300 is also shown with an illumination intensity selection button 3314(3) that may be used to control the intensity of display 1906, a slow flash selection button 3314(6), and a fast flash selection button 3314(7) Remote control 3300 is also shown with an alpha-numeric keypad 3306 for enteimg user selected messages for display on the traffic safety arrow system
[0097] Remote control 3300 may include othei buttons 3314 that facilitate control of the traffic safety arrow system For example, remote contiol 330 is shown with navigation contiols 3304 (including an "entei " button) that allows a usei scioll through menu selections displayed on the tiaffic safety arrow system (e g , displayed on display 1906 of system 1900) That is, display 1906 and navigation controls 3304 of remote control 3300 allow a user to interact with traffic safety arrow system 1900 to select operation of the traffic safety arrow system by selecting one or more displayed menu options In an embodiment, remote control 3300 includes an accept button 3314(8) and a cancel button 3314(9) that allows the user to accept and cancel, respectively, entered changes to the traffic safety arrow system In one example of operation, a usei programs the phrase "SPEED LIMIT 20" into traffic safety arrow system 1900 using the alpha-numeπc keypad 3306, navigation controls 3304, and accept button 3314(8) of remote control 3300
[0098] In an alternate embodiment, remote control 3300 emits a radio frequency signal when one or more of buttons 3314 are depressed, and sensor 1932 represents a radio frequency receiver such that controller 1902 may decode the signal transmitted from remote control 3300
BLDRDOCS 1 1 1531 v5 Docket 484477
[0099] In an embodiment, one oi moie buttons 3314 of i emote contiol 3300 aie also disposed on the body of the tiatfic safety aπow system (e g , as buttons 1914 on enclosuie 1952 oi tiaffic safety anow system 1950, FIG 19B) Foi example, these buttons may be implemented on the ieai or sides of enclosuie 1952
|0100] FlG 34 shows one exemplary display 3406 of the traffic safety arrow systems of FIGS 1 and 2, the display having a plurality of illuminated segments In this example, display 3406 has forty-five shaped segments 3402 that may be selectively illuminated to form the previously described displays of traffic safety arrow systems 100 and 200, FIGS 1 and 2, respectively Each shaped segment 3402 may be illuminated by one or more LEDs, or othei light sources, and may include light channeling and/or diffusing materials Display 3406 may thus have improved clarity over bare, or simply lensed, LED displays
10101] FIG 35 shows exemplary frames 3500, 3520, 3540, and 3560 of display 3406, FIG 34 In this example, frame 3500 shows selective elements illuminate to display the word "SLOW " Frame 3520 shows two left arrows that may be independently flashed to show motion, and frame 3540 shows two right left aπows that may be independently flashed to show motion Frame 3560 shows an "X "
[0102| Changes may be made in the above-described methods and systems without departing fiom the scope hereof It should thus be noted that the matter contained in the above description, or shown in the accompanying drawings, should be interpreted as illustrative, and not m a limiting sense For example, LEDs with shapes other than those shown in the accompanying figures may be used, and the number and spacing of the LEDs may be varied without departing from the scope hereof The following claims are intended to cover generic and specific features described herein, as well as the scope of the present method and system, which, as a matter of language, might be said to fall there between
19
BLDRDOCS 1 1 1531 v5

Claims

Docket 484477
What is claimed is
1 A tiaffic safety aπow system foi imparting tiaffic control information to traffic, comprising a plmality of light emitting diodes (LEDs), an input switch for selecting the information to be displayed, a plurality of solid state switches, each solid state switch connected to one or more of the LEDs, a controller for reading the mput switch and controlling the solid state switches to illuminated the LEDs to display the traffic control information, a battery for providing power to the traffic safety arrow system, a voltage controller for generating an operating voltage from the batteiy to operate the traffic safety arrow system, and an enclosure foi housing the LEDs, the input switch, the solid state switches, the conti oiler, the voltage controllei, and the batteiy, the enclosure having at least two slots formed through a lower part thereof to facilitate attachment of the traffic safety arrow system to a traffic barrel
2 The system of claim 1 , further comprising a solar panel mounted to a top surface of the enclosure, wherein the battery is a rechargeable battery, the voltage controller further operating to charge the rechargeable battery with power from the solar panel
3 The system of claim 2, wherein the solar panel is sized to match the top surface of the enclosure
4 The system of claim 2, wherein the enclosure is sized to match the size of the solar panel
20
BLDRDOCS 1 1 1531 v5 Docket 484477
5 The system ot claim 1 wheiein the batteiy is at least one consumable batteiy, the consumable batteiy being accessible thiough a batteiy door within the enclosuie such that the batteiy may be replaced
6 The system of claim 1, the LEDs being aπanged to form one or moie of a left aiτow, a right arrow, a double aπow, a cross, and the woid "slow "
7 The system of claim 1 , the LEDs being arranged to form, upon selective illumination, each of a left arrow, a right arrow, a double arrow, a cross, and the word "slow "
8 The system of claim 7, the displayed traffic control information being animated
9 The system of claim 7, the displayed traffic control information flashing
10 The system of claim 1 , the LEDs being arranged as a two-dimensional array
1 1 The system of claim 10, the tiaffic contiol mfoimation being formatted for display on the LEDs based upon the size of the two-dimensional array
12 The system of claim 10, the traffic control information being scrolled over the LEDs
13 The system of claim 10, the traffic contiol information being partially displayed as static and partially displayed as animated
14 The system of claim 1 , further comprising a light sensor, the controllei automatically adjusting the brightness of the displayed traffic control information based upon a sensed ambient light level from the light sensor
15 The system of claim 1 , further comprising a remote control, the remote control having at least one button for remotely controlling the traffic safety arrow system
21
BLDRDOCS 1 1 1531 v5 Docket 484477
16 The system of claim 15, the i emote conti ol genei ating an mil a-i ed contiol signal, the tiaffic safety aπow system fuithei compiismg a sensoi foi detecting the mfia-red contiol signal
17 The system of claim 15, the i emote control geneiatmg a iadio frequency control signal, the traffic safety aπow system furthei comprising a sensor for detecting the radio frequency control signal
18 A traffic safety method for imparting traffic control information to traffic in a construction zone, comprising positioning a traffic barrel to block traffic flow, the traffic barrel having disposed thereon a traffic safety arrow system, using switches on the traffic safety system to select one of a plurality of display sequences, determining, if the switches have changed from one of the plurality of display sequences to another of the plurality, a display sequence and a step penod, based upon the switches, displaying, if the switches have changed, the fust step of the display sequence, displaying, if the switches have not changed, a next step in the display sequence, and repeating the steps of determining and displaying until the traffic safety arrow system is turned off
19 The traffic safety method of claim 18, the step of positioning comprising attaching the traffic safety arrow system to the traffic barrel using two non-metal bolts and two non-metal nuts, each bolt passing through one of two slots in the traffic safety arrow system and then through one of two mounting holes of the traffic barrel, each bolt then being secured by one of the nuts, wherein the slots facilitate attachment of the traffic safety arrow system to traffic barrels with mounting holes of various widths and sizes
22
BLDRDOCS 1 1 1531 v5 Docket 484477
20 A tiaffic safety anow system toi imparting tiaffic contiol mfoimation to traffic, compiismg means ioi attaching the traffic safety anow system to a tiaffic ban el, means for selecting the traffic control information for display on the tiaffic safety arrow system, means for displaying the tiaffic contiol mfoimation, and means for poweπng the traffic safety arrow system
21 The traffic safety arrow system of claim 20, further comprising means for pow ermg the traffic safety arrow system from solar energy
22 The traffic safety anow system of claim 20, further comprising means for attaching the traffic safety anow system to a tripod
23
BLDRDOCS 1 1 1531 v5
PCT/US2008/075147 2007-09-04 2008-09-03 Traffic safety arrow systems and methods WO2009032859A1 (en)

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