GB2039114A - Display system - Google Patents

Abstract

If a traffic accident occurs, the operator will press down a key corresponding to the traffic accident cause. A microcomputer will pick up a corresponding dot matrix pattern from the microcomputer read- only memory and pass it through a programmable key-board-and-display interface to display the pattern on display means.

Description

SPECIFICATION A display system TECHNICAL FIELD The present invention relates to a display system for displaying the cause of a traffic accident.

STATEMENT OF INVENTION According to the present invention there is provided a display system comprising a computer having a memory to receive a plurality of codes, each code corresponding to a particular cause of a traffic accident, a display means and selector means to select from the memory a code corresponding to a particular accident cause, and to pass the code to the display means which displays a pattern corresponding to said accident cause.

Each code received in the memory may be a matrix code, and the display means may be a matrix display means. The selected code may be received by a programmable key board and display interface which passes the code to the display means. The display system may include two programmable key boards and display interfaces, and the displayed pattern may comprise characters of a foreign country.

FIGURES IN THE DRAWINGS An embodiment of the invention will now be described by way of example with reference to the accompanying illustrative drawings in which:~ Figure 1 illustrates a matrix display pattern corresponding to a tyre burst, Figure 2 is a block schematic diagram of a display system of the invention, Figure 3 is a block schematic diagram of a microcomputer, key board, matrix display, programmable key board and display interfaces of a display system of the invention, and Figure 4 shows part of the electrical circuit of a display system of the invention.

DETAILED DESCRIPTION OF DRAWINGS Referring to the drawing, one display system of the invention includes a single chip microcomputer, such as the product 8048 of Intel Company in the U.S.A., or its equivalent.

This microcomputer consists of a central processing unit, RAM, ROM and an input/output port.

The system also includes two programmable key board and display interfaces, such as the product of 8279 of the Intel Company in the U.S.A. or its equivalent, a matrix display composed of visible LED, and a key board.

The various kinds of traffic accidents are converted into various kinds of corresponding display patterns, which are then converted into code and stored in the ROM of a single chip microcomputer 21 such as the product of Intel 8048 of Intel Company, U.S.A. or its equivalent.

For example, the display pattern of a burst tyre of a car as shown in Fig. 1 is indicated by the black dots in a 16 X 16 matrix. The presence of a black dot indicates "1", and the absence of a black dot indicates "0".

Line 1: 00000111 ,1 1 100000 =07HEX' EOHEX Line 2: 00001111 ,11110000 =OFHEx FOHEX ,. .. .. .. .. ..

Line 16: 00000000 ,00000000 = 00HEX' 00HEX

Each line is indicated by a 2 byte code, and the whole display pattern is indicated by 2 byte/column x 16 columns = 32 bytes. The various kinds of traffic accident are converted into the corresponding code of the 32 bytes as shown in the aforementioned (F) pattern, and are stored in the ROM of single chip microcomputer 21.

The flow chart of the control programme in the single chip microcomputer 21 of this invention is shown in Fig. 2.

Fig. 3 shows the block diagram of the single chip microcomputer 21, the key board 24, the visible LED matrix display 27a and 27b, the programmable key board and the display interfaces 22a and 22b; such as the product of Intel 8279 of Intel Company, U.S.A. or its equivalent.

The detailed electrical circuit of the computer display in response to a traffic accident is shown in Fig. 4, in which the "reset" line of the single chip microcomputer 21 is transmitted into the phase inverter 23 so as to be converted into a "reset" signal; it is then transmitted to the ''reset" pins of two programmable key board and display interfaces 22a and 22b so as to complete the "reset" operation. The Scan Line "S0#3, of the second programmable key board and display interface 22b is transmitted to the 4 lines to 16 lines decoder 28. The 16 line output is then used for the scan of the "1-16 column" of the visible LED matrix display 27a.

By the same theory, the 16 line output of a 4 line to 16 line decoder 26 will be used for the scan of the "1-1 6 column" of the visible LED matrix display 27b. The Scan lines "SO-3" of the second programmable key board and display interface 22b is transmitted to a "3 line to 8 line" decoder 25 so as to obtain an output of "8 line binary signal", which will then be transmitted to a "8 row line of key board 24" for key board operation. If a traffic accident should occur, the operator should press down the key on the key board which indicates the code of a given traffic accident; then, the single chip microcomputer 21 will execute a control programme corresponding to the key which has been pressed down to indicate a traffic accident code.The said code will be picked up from the ROM and transmitted through the two display interfaces of the two programmable key board and display interfaces 22a and 22b to control the operation of LED of the visible LED matrix display 27a and 27b. The on and off arrangement of the LED lights shown on the visible LED matrix display 27a and 27b will indicate a symbol pattern which corresponds to the cause of the traffic accident. The symbol pattern as shown in FIG. 1 may be converted into the characters of every country and then converted into the 32 type code so as to be stored in the ROM of single chip microcomputer 21 of this invention for displaying the character of any country desired.

The symbol pattern as shown in Fig. 1 may be converted into various kinds of patterns required on the highway so as to indicate various kinds of traffic signs.

Further, the symbol pattern as shown in Fig. 1 may also be converted into the warning patterns which are usually used by the police for law enforcement.

Claims (6)

1. A display system comprising a computer having a memory to receive a plurality of codes, each code corresponding to a particular cause of a traffic accident, a display means and selector means to select from the memory a code corresponding to a particular accident cause, and to pass the code to the display means which displays a pattern corresponding to said accident cause.

2. A system as claimed in Claim 1, in which the display means is a matrix display means to receive from the memory a matrix code.

3. A system as claimed in Claim 1 or Claim 2, including a programmable key board and display interface to receive the selected code and pass it to the display means.

4. A system as claimed in Claim 3, including two programmable key board and display interfaces.

5. A system as claimed in any preceding Claim, in which the display means is adapted to display a pattern comprising characters of a foreign country.

6. A display system substantially as herein described and shown in the accompanying drawings.