JP2680233B2 - Display for traffic signal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traffic signal display device, and more particularly to a traffic signal display device which is arranged at a position visible at the same time as the traffic signal and displays information such as traffic information, traffic slogans, and advertisements. Regarding

[0002]

2. Description of the Related Art Traffic signals are intended to smooth the flow of vehicles and people and to prevent traffic accidents. For this purpose, the traffic light is sequentially turned on in three colors of blue, yellow and red by time control. In addition, a display board for displaying the name of an installation place of the traffic light and a display board for describing an advertisement are attached to upper and lower portions or side surfaces of the traffic light.

[0003]

By the way, in the above-mentioned display panel, it is easy to confirm the display contents by external light in the daytime, but it is difficult to confirm the display contents when the external light is dark at night or the like. There were problems such as difficulty. In addition, there is a problem that it is difficult for a driver or a pedestrian to confirm the signal light by sunlight in the daytime only by lighting the signal with the traffic signal alone.

The present invention has been made in view of such circumstances, and has a function of easily confirming a signal color by a driver or a pedestrian, and also has a function of confirming traffic information, a traffic slogan, and an advertisement function by advertising. An object of the present invention is to provide a display device for a traffic light.

[0005]

In order to achieve the above object, the present invention is a display means for displaying traffic information, traffic slogans, advertisements, etc., which is arranged at a position visible at the same time as a traffic signal. Display means capable of displaying the information on the display surface and / or the emission color of the background of the information by switching to the same color as each color of the traffic signal, and a display means arranged for each lamp of each color of the traffic signal Detection means for detecting the light-off state without changing the electric circuit of the traffic signal, and control means for controlling switching based on the detection output of the detection means so that the emission color of the display means becomes the same color as the traffic signal. It is characterized by having.

[0006]

According to the present invention, the display means is arranged at a position visible at the same time as the traffic signal, and the information such as traffic information, traffic slogans and advertisements displayed on the display means and / or the background of the information is displayed. , The light is switched so that it has the same color as the traffic signal. That is, the on / off state of each color of the traffic signal is detected without changing the electric circuit of the traffic signal, and the light emission of the display means is made to be the same as the color of the lamp in the light state based on the detection output of this detection means. I am trying to switch colors. Thereby, the confirmation of the signal color can be confirmed not only by the signal lamp but also by the display color of the display means, and various information displayed on the display means can be confirmed at the same time. In addition, since the on / off state of each color of the traffic signal is detected without changing the electric circuit of the traffic signal and the electric circuit of the traffic signal is not changed, the safety of the traffic signal can be ensured. it can.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the display device for a traffic signal according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a traffic safe constituting a traffic light display device according to the present invention.
It is an external view which shows the state in which the ty panel (henceforth a TS panel) was attached to the traffic signal. In the figure, reference numeral 10 denotes a known traffic signal having three colors of blue, yellow, and red, and is attached to a support rod 12 from a telephone pole (not shown) via a fitting 14 below.

Reference numeral 20 is a TS panel, specifically, a color plasma display panel. The TS panel 20 is mounted above the traffic signal 10 via the mounting bracket 14 so that the TS panel 20 can be visually recognized simultaneously with the traffic signal 10. At the intersection of a crossroad as shown in FIG.
For example, four T-mounts mounted on a traffic light for roadways
A total of twelve S panels 20A and eight TS panels 20B attached to sidewalk traffic signals are installed. And these 12 TS panels 20A, 20A
In B, the display pattern on each panel surface is simultaneously controlled from the controller 30 via the optical communication cable 35.

FIG. 3 is a block diagram showing an embodiment of the internal structure of the TS panel and controller. As shown in FIG. 1, the TS panel 20 mainly includes a synchronization detector 21, a central processing unit (CPU) 23, a memory 24, a video signal generator 25, a display control circuit 26, and a light emitting panel 27. The controller 30 mainly includes a 16-channel multiplexer 31 and an RS for performing optical communication.
232C circuit 32, a memory card unit 33, and a power supply unit 34.

The controller 30 is operated when changing the display pattern of traffic information, traffic slogans, advertisements, etc. displayed on the TS panel 20, and by replacing the memory card in the memory card unit 33, the memory card The display pattern data recorded in advance is read, and the display pattern data is transferred to each TS panel 20 via the RS-232C circuit 32, the 16-channel multiplexer 31 and the optical communication cable 35.

The display pattern data transferred from the controller 30 is stored in the memory 24 via an interface (not shown) for optical communication of the TS panel 20 and the CPU 23. A synchronization signal is applied to the CPU 23 of the TS panel 20 from the synchronization detector 21 via the traffic light interface 22. The sync detector 21 is provided for each lamp of each color of the traffic signal 10, and outputs a sync signal indicating the lighting / extinguishing state of each lamp in synchronization with signal switching. It is a detector that is not electrically connected.

For example, as a synchronization detector 21 of this type, as shown in FIG. 4, a coil 21A is wound around each conducting wire 10B for lighting each lamp 10A of a traffic signal, and is generated by a current flowing when the lamp is lit. A device that converts a magnetic field into an electric signal, a photosensor 21B that is provided so as to face each lamp 10A of a traffic signal as shown in FIG. 5, and that converts light when the lamp is lit into an electric signal can be considered. In addition, in FIG. 5, 10B is a sunshade cover of the lamp.

In FIG. 3, the CPU 23 has a memory 24.
Based on the display pattern data stored in and the sync signal indicating the color of the currently lit lamp applied via the traffic light interface 22,
The pattern is white emission, the background color is the same color as the traffic light, the video signal is output to the display control circuit 26 via the video signal generator 25, and the display control circuit 26 emits light based on the input video signal. The panel 20 is made to emit light. The operating temperature range of the TS panel 20 is 0 ° C to 45 ° C.
The thermoelectric heater and the fan heater 29 are driven by the power supply 28 so that the temperature becomes ° C. The power supply 28 supplies power to each circuit of the TS panel 20.

According to the above construction, the advertisement characters, patterns, etc. are emitted white on the panel surface of the TS panel 20, and the background color is switched in synchronization with the switching of the traffic signal so as to have the same emission color as the traffic signal. As described above, the TS panel 20 can provide various information to the driver and the pedestrian, and the large panel surface can be switched so that the emission color of the same color as that of the traffic light can be obtained. It can have a function as a visible auxiliary signal. Moreover, since the TS panel 20 is provided completely separated from the electric system of the traffic signal,
It does not impair the reliability of the traffic signal.

In this embodiment, the color plasma display panel whose display pattern can be appropriately changed is used as the TS panel. However, the present invention is not limited to this, and for example, a display plate formed of a light-transmissive material may have characters and figures. Etc., and the display plate may be configured to be sequentially illuminated with backlights of three colors of blue, yellow, and red.

[0016]

As described above, according to the traffic signal display device of the present invention, the display means for displaying information such as traffic information, traffic slogans, advertisements, etc. is switched and emitted so as to have the same color as the traffic signal. Therefore, it is possible to function as an auxiliary traffic light that allows a driver or a pedestrian to easily visually recognize the signal color. In addition, since the display device is disposed at a position that can be viewed at the same time as the traffic signal, it is possible to provide a display device with a high advertisement function when transmitting various information to a driver or a pedestrian. Further, according to the traffic signal display device, the traffic signal is completely separated from the electric system, and it is not necessary to change the electric circuit of the traffic signal, so that the safety of the traffic signal can be ensured.

[Brief description of the drawings]

FIG. 1 is an external view showing a state in which a display device for a traffic signal according to the present invention is mounted on a traffic signal.

FIG. 2 is a diagram illustrating an example of an arrangement of a TS panel and a controller at a crossroad intersection;

FIG. 3 is a block diagram illustrating a configuration example of a TS panel and a controller.

FIG. 4 is a diagram illustrating an example of a synchronization detector illustrated in FIG. 3;

FIG. 5 is a diagram showing another example of the synchronization detector shown in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Traffic light 10A ... Lamp 20, 20A, 20B ... TS panel 21 ... Synchronous detector 21A ... Coil 21B ... Photo sensor 23 ... CPU 24 ... Memory 25 ... Video signal generator 26 ... Display control circuit 27 ... Lighting panel 30 ... controller

Continuation of the front page (56) Reference JP-A-53-147500 (JP, A) Actually open 59-147298 (JP, U) Actually open 61-147498 (JP, U) Actually open 1-84198 (JP , U) Actual Development Sho 54-48593 (JP, U) Actual Public Sho 37-1641 (JP, Y1) Actual Public Sho 38-27933 (JP, Y1)

Claims (3)

(57) [Claims] 1. Display means arranged at a position visible at the same time as a traffic signal and displaying information such as traffic information, traffic slogans, advertisements, etc., wherein the information on the display surface and / or the background light emission of the information. Display means capable of switching the color to the same color as each color of the traffic signal and displaying, and detecting the lighting / off state of each lamp provided for each lamp of each color of the traffic signal without changing the electric circuit of the traffic signal. A traffic signal display device comprising: a detection unit; and a control unit that controls switching based on a detection output of the detection unit so that the emission color of the display unit becomes the same color as the traffic signal. 2. The detection means is a magnetoelectric conversion means which is disposed on each conducting wire for lighting each lamp of a traffic signal and which converts a magnetic field generated by a current flowing at the time of lighting the lamp into an electric signal. Display device for traffic signals. 3. The display device for a traffic signal according to claim 1, wherein the detecting means is a photosensor which is arranged so as to face each lamp of the traffic signal and converts light when the lamp is lit into an electric signal.