CN2240171Y

CN2240171Y - Traffic light with picture display

Info

Publication number: CN2240171Y
Application number: CN 94244344
Authority: CN
Inventors: 周明玉
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-11-05
Filing date: 1994-11-05
Publication date: 1996-11-13
Anticipated expiration: 2004-11-05

Abstract

The utility model relates to a traffic light added with a picture display, and particularly relates to a device which uses an LED display added below the traffic light to show characters or figures to improve the alarm effect of light numbers. A dot matrix type LED display controlled and driven by a control circuit is arranged below the traffic light by the utility model; data to be displayed are input from external parts through an RS-232 serial interface and triggered by the light numbers of the traffic light to cause pictures of different characters or figures to be displayed according to the change of the light numbers to improve the attention of drivers, and thus, the probability of traffic accidents can be reduced.

Description

The traffic lights of additional screens display

The utility model relates to a kind of traffic lights that have view display, mainly be near traffic lights, to set up some matrix LED displays, and by a control circuit controlling and driving, to show different literal or graph data automatically with the cresset variation of traffic lights, thereby improve the notice of human pilot, increase the caution effect of traffic lights.

Importance and the efficient of traffic lights aspect traffic control is can not replace and unquestionable, and this can be by when traffic lights break down or have a power failure, and the situation that traffic causes confusion obtains best counterevidence.But, general traditional traffic lights only are used for the usefulness of identification, there is no other auxiliary display device, strong at sunshine, haze or when rainy, it is unclear that debating of driver known, and the probability that the increase traffic accident takes place, especially when driver's mental status is not good,, and cause the temporary vision numbness of driver easily because the traffic lights on each crossing are similar, be that cresset has lost the visual stimulus to the driver, and then lead to fatal danger; Moreover, though be provided with display on the many places strategic road in urban district, in order to inform traffics such as road conditions and weather, locate at the crossing but its set position is all non-, and the driver can't come back traditionally and note the top when driving is not arrived the crossing, and the speed of a motor vehicle is also higher, the shown information of this display fails to be known by the driver, and it is performed practically no function.

Carve or when weather is relatively poor, still can be well understood to information such as road conditions in due course in order to make human pilot; need be when setting up traffic lights; the display of relevant literal or figure is installed; and it is arranged on the position that human pilot can be noticed usually; remind human pilot with this, the chance of makeing mistakes when reducing driving.

To achieve these goals, the utility model provides a kind of that be built up in traffic intersection and the display of traffic lights near installing, this demonstration can provide with the change of traffic lights cresset with cresset and change corresponding or relevant figure or Word message, so that human pilot is noticed for information about when noting traffic lights.

The traffic lights equipment of band view display provided by the utility model comprises:

At least a dot matrix type light-emitting diode display device that is located at traffic lights upper limb or lower edge or side;

A controller circuitry device that is associated between described traffic lights and the described light-emitting diode display, wherein, described controller circuitry device comprises:

Input circuit, this circuit is connected between traffic lights system and the central processing unit, and the electric signal that is used for when traffic lights are changed is transferred to described central processing unit;

The external storage device is linked on the described central processing unit, is used to store the described figure or the lteral data that will show on described dot matrix light-emitting diode display;

Interface circuit device, link through described central processing unit and described external storage device, be used for to be input to described external storage device from the figure that will on described display, show or the lteral data in the external world under the control of described central processing unit;

Output circuit is connected between described central processing unit and the described light-emitting diode display device, is used for converting the signal of described central processing unit to serial data by parallel data, and drives these data and show on described display equipment.

Following conjunction with figs. describes in detail.

Fig. 1 is a schematic appearance in kind of the present utility model;

Fig. 2 is a system block diagram of the present utility model;

Fig. 3 is detailed microcomputer circuit figure of the present utility model;

Fig. 4 is the row generation circuit of the utility model ranks demoder;

Fig. 5 is an input circuit of the present utility model;

Fig. 6 is that circuit takes place the row of the utility model connecting circuit and ranks demoder;

Fig. 7 is the utility model advertisement plate circuit.

Consult Fig. 1 earlier, it is a stereo appearance figure of the present utility model, can find out, the utility model is to set up some matrix LED displays under general traffic lights, then be provided with control circuit in it and give controlling and driving, its system block diagram that is shown in Figure 2, it is to be taken into via the cresset signal of input circuit with traffic lights, to give microcomputer circuit different trigger pips, if microcomputer circuit is connected to a RS-232 serial device interface, can be by the word or the graph data of external computer display frame that input is desired, and it is stored in the external storage, the output signal of microcomputer circuit is then delivered to the double driving circuit of a conversion, parallel data being converted to the determinant data, and drive point matrix LED display shows correct information, can change according to the cresset of traffic lights and change display frame automatically, its RS-232 serial device interface then can be with bus interface to control center, with motor-driven adjustment display message at any time.

Please cooperate and then and consult Fig. 3 to 7, it is a detailed circuit diagram of the present utility model, and it includes capable code generating circuit 16, the dot matrix type light-emitting diode display 15 of row code generating circuit 12, input circuit 13, driving circuit 14 and the ranks demoder of microcomputer circuit 11, ranks demoder; Wherein microcomputer circuit 11, as shown in Figure 3, it is to be core with a single-chip microprocessor 8751 (U7), and cooperate ternary latch 74LS373 (U8) to produce the address decoding, to read the data of external storage 62256 (U9), with as the Data Source that is shown on the light-emitting diode display 15, pick out the RS-232 serial device interface by microcomputer circuit 11 in addition and can communicate by letter with the external world and obtain or as changing the required data of external storage; The DATA BUS (D0-D7) of microprocessor U7 is connected to Fig. 5 and Fig. 7, this input circuit 13 of three-state driver U14[that wherein is connected in Fig. 5 input circuit 13 is to drive relay (RELAY) K1～K3 with existing traffic signals to give U14 (74LS244) with the signal that produces 5V], and the demoder U11 decoding in the row code generating circuit 12 of cooperation Fig. 4, deliver to microprocessor U7 to obtain present traffic lights cresset signal, microprocessor U7 promptly obtains corresponding video data from memory U9, be connected to by its ADDRESS BUS (A15-A0) on the demoder 74159 (U11) in the row code generating circuit 12 of Fig. 4 and decoded, to solve certain row in 4 row, be connected to latch 74LS373 (U5 in Fig. 7 light-emitting diode display 15 by JP2-JP5 again, U6), and cooperate the DATA BUS (D0-D7) of microprocessor Fig. 2 (U7) that data are served to determine that, at this moment, microprocessor U7 utilizes P1.1-P1.7 to deliver to demoder 74159 in the capable code generating circuit 16 among Fig. 6, to solve which word in 16 words, seeing through JP7 again is connected to demoder 74159 (U4) in the light-emitting diode display 15 and solves in 16 certain 1 again, add up and row

code generating circuit

16,12 must be intersected on a certain LED, so heavily cover all to sweep and go over up to each LED, just the data in the external storage U9 can be seen through above-mentioned microcomputer circuit 11, the row code generating circuit 12 of ranks demoder, input circuit 13, the capable code generating circuit 16 of driving circuit 14 and ranks demoder, all control circuits such as light-emitting diode display 15 are revealed on the display, display can show the figure of Chinese font or 64 * 256 of 64 16 * 16 dot matrixs altogether, also can optionally be increased and decreased, light-emitting diode display 15 is to be formed by connecting by 16 * 16 LED matrixes.

From the above, the utility model is to utilize single-chip microprocessor 8751 (U7) in the microcomputer circuit 11 to decode U5 and U6 (74LS373) through 7406 drivings of making LED matrix Z-axis common cathode, P1.0～P1.3 with U7 (8751) delivers to 74159 (U4) BCD makes the common anode positive supply of LED matrix level to the decoding of decade 0～15 supply scanning in addition, the scanning that so then can form LED matrix 16 * 16 shows control, cooperate the row code generating circuit 12 of ranks demoder and the capable code generating circuit 16 of ranks demoder again, can scan 64 16 * 16 LED matrix; Hence one can see that, the 74LS06 that second LED matrix need not re-use U5 and U6 (74LS373) and U1～U3 gives the Z-axis common cathode of driving LED matrix, and directly by the 74LS06 on the first machine plate of each row, U1～U3 (U1A, U1B, U1C, U1D, U1E～U3A, U3B, U3C, U3D) output is connected in parallel to get final product, this connection is connected by the 32 faller gill lines and the socket of driving circuit 14, therefore, this circuit board need only a kind ofly can be connected into it different address.

Light-emitting diode display of the present utility model is directly arranged in the lower edge of the lamp of traffic lights, as shown in Figure 1, therefore the utility model can cooperate cresset to show (as wording or other figures such as careful current or green light are current) at green light simultaneously, and can do the wording of significantly flicker or " amber light " during amber light, the driver prepares brake with warning, when red light is bright, just can show as wording or figures such as " red light stop ", maybe can show road conditions again, weather conditions or traffic poster, because of driver's attention traffic lights that must come back at the crossing, so the utility model can improve the original caution effect of traffic lights, if also have the splendid effect of informing as the traffic display.By the above as can be known, the utility model has practical value, and the tool multi-usage, multi-functional, not only good favour a few peoples more do a great deal of good to whole traffic safety.

Claims

1. traffic lights equipment that has view display is characterized in that described traffic lights equipment comprises:

Input circuit, this circuit are connected between traffic lights system and the central processing unit;

The external storage device is linked to described central processing unit;

Interface circuit device links through described central processing unit and described external storage device;

Output circuit is connected between described central processing unit and the described light-emitting diode display device.