JPH0664431B2 - Display element failure position search device for large display devices - Google Patents

Description

TECHNICAL FIELD The present invention relates to a display element failure position search device for a large-sized display device.

[Prior Art] Conventional devices of this type are shown in FIGS. 6 and 7. In the figure, reference numeral 30 denotes a display unit attached to a control unit (not shown) of the large-sized display device, which is a brightness adjusting device 5.
Large display device 80 attached to 0 socket (4 x 8)
Is displayed. 60 is a power supply unit of the failure position search device 70,
Reference numeral 80 denotes a large display device, which is an output data cable from the brightness adjusting device 50 for unit-testing the display unit 30,
The DC power cable and the AC power cable 46 are connected.
Reference numerals 41 to 43 are brightness adjustment volumes, and 31 is an LED.

Next, the operation will be described. First, the brightness adjusting device 50 can turn on and off the large display device 80 arbitrarily by giving data for turning on / off the display element of the display unit 30 and an output signal for setting / resetting the display unit 30. . The display is performed by setting the switch 34 to any of "ALL", "HALF", and "SEQ". For example, when the display elements of the entire display unit 30 (vertical (4) × horizontal (8)) are turned on, the switch 34 is set to “ALL”. Pushbutton switch 35 ON / OFF in the "ALL" state
By turning it off, it is possible to perform a lighting and extinguishing test for one display unit of the large-sized display device 80.

[Problems to be solved by the invention]

Since the conventional display element failure position detection device of the large-sized display device is configured as described above, if the display element fails, the inspector will follow the large-sized display device with his / her eyes to find a rough failure position and then apply The display unit is pulled out from the control unit and the failure is found by using the brightness adjustment device, so if the user makes a mistake in the visual inspection, the unit in the vicinity of the failure will be pulled out and investigated, which takes a lot of time and effort. There was a problem. Further, there is a problem in that it is difficult to follow the vicinity of the center of the large-sized display device with eyes and it is not easy to grasp the approximate position.

The present invention has been made in order to solve the above problems, and provides a character processing device having a CRT display and a keyboard for searching the position of a defective display element, and a moving image processing apparatus for controlling the display element. An object of the present invention is to provide a display element failure position search device for a large-sized display device that can be used to easily search for a failure position.

[Means for solving problems]

A display element failure position search device for a large-sized display device according to the present invention displays the position of the display device on the screen of a CRT display, the position data of the display device is received by a character processing device, and the received output signal is received. Received by the video processing device,
The display board performs the process of turning on only the display element in the vertical column and the horizontal row corresponding to the position, and operates the key of the keyboard to match the intersection point to the arbitrary display element to locate the failure position on the CRT display. It is intended to be displayed.

[Action]

In the search for the failure position of the display element in the present invention, the failure position of the display element is immediately searched by displaying the intersection of any one column and one row on the display board on the CRT display.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. First
In the figure, 1 is a CRT display having a charactor display function, 2 is a keyboard, 3 is a character processing device for controlling video display, digital display and special effect display processing, 4 is a CPU board, 5 is a CRT display 1 and data. A serial interface for transmission, 6 is a serial interface for transmitting data to and from a moving image processing device 8 which will be described later, 7 is a memory board, and 8 is a digital signal from a character processing device for processing a video signal for video display. A moving image processing device for receiving a signal and displaying digital and special effects, and 9 is a CPU
Board 10, 10 is a serial interface for transmitting data to and from the character processing device 3, 11 is a memory board, 12
Is a character control board for performing character display processing, 13 is an input / output board, and 14 is a video signal capturing device, and is provided in red, green, and blue.
A decoder that decomposes into components and generates a synchronization signal,
Reference numeral 15 is an A / D converter for converting three video (analog) signals of red, green and blue into a digital signal, and 16 is an A / D converter.
A frame memory that stores D-converted video data and character data and mask data transmitted from the character control board 12, and has a video memory, a video mask memory, and a character memory according to the application.
Reference numeral 17 is a timing control for generating a video data write address and a sampling pulse for A / D conversion, 18 is an address controller for generating a video data read address and charactor data write / read address, and 19 is a display element described later. 23 is a pulse for setting / resetting a signal for turning on / off the light and a set / reset pulse for generating an address, an address generating circuit, and 20 is for selecting the data read from the frame memory 16 by 16 dots and latching the display board 22 Column selection circuit for transferring to the column, 21 receives set / reset pulse, address
A row selection circuit that sends a set / reset signal to the display board bit by bit, 22 is a display board, and 23 is a display element.

Next, the operation will be described. First, an explanation will be given according to the flow chart of FIG. First, I will explain the term cross-display test. As shown in FIG. 3, this is to turn on only the display elements 23 in one column and one row in the display board 22 and to search the position by matching the intersection of the matrix with the defective display element. When performing the cross display test, the screen of the display board 22 is cleared. Next, press the CROSS DISP TEST key (ST-1). The CPU board 4 receives the data of the cross display test (ST-2), (ST-3).
Then, the data for displaying the display test pattern as shown in FIG. 4 on the CRT display 1 is read from the memory board 7 (ST-5). In FIG. 4, A is the position of the display element and B is the position of the unit in which the display element is included. Initially the values of X = 1 and Y = 1 are CRT
It is transmitted to display device 1 (ST-6). Where X
Is a horizontal address of the display board 22, and Y is a vertical address. Further, the CPU board 4 transmits to the moving image processing device 8 that it is in the cross display test mode (ST-8). When the CPU board 9 receives it, it writes data in the memory board 11 of the character control board 12 based on the values of X and Y (ST-9), (ST-1).
0). FIG. 5 shows the write operation when X = 1 and Y = 1. FIG. 5 is a model diagram showing how test data is written from the CPU board 4 of the character processing device 3 to the character control board 12 of the moving image processing device 8. First, the CPU board 4 reads the test data from the memory board 7. Is sent to the CRT display 1 through the serial interface 5, and after confirmation, the test data written in the memory board 7, that is, the character control board 1
Data corresponding to 2 is called via the D ₀ , D ₁ ... D ₇ (8 bits) address bus, the test data is converted into serial data by the moving picture processing device 6, and the character control board is sent via the serial interface 10. It is transmitted to 12 as cross display test data. As mentioned above, C
Since the data of one address of the PU board 9 is 8 bits and the data of the character control board 12 is 16 bits, the data ("1" or "1" or Write "0").
When the writing is completed, the CPU board 9 transfers the data from the character control board 12 to the character memory in the frame memory 16 (ST-11). When the operation is completed, the data is read (ST-12) and sent to the display board.
This data is data for turning on / off the display element. First, the display elements on the lines of X = 1 and Y = 1, that is, the display element in one row from the top of the display board and one column from the left are turned on (ST-1).
3).

Next, the keys ↑, ↓, ←, → are pressed on the keyboard so that the intersections of the vertical and horizontal lines coincide with the defective display element 23 (ST-14). Upon receiving the key data, the CPU board 9 updates the X and Y values stored in the memory 11. For example, when the → key is received, the value of X is incremented by 1 (ST-16) to (ST-18). The result is transmitted to the CRT display 1 (ST-19) and the moving image processing apparatus 8 (ST-8). The updated X and Y values are displayed on the CRT display 1, and the X and Y values are displayed on the moving picture processing device 8.
Writing / reading to / from the memory is executed based on the value of, and the display elements 23 of the X and Y lines are turned on.

〔The invention's effect〕

As described above, according to the present invention, the character processing device provided with the CRT display and the keyboard and the moving image processing device for performing the video display or the special display are combined with each other by operating the keyboard to cause the display element failure. Since the position is searched, there is an effect that the search time for the failure position can be greatly shortened and a highly accurate search result can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram of a display element failure position search device for a large-sized display device according to an embodiment of the present invention, FIG. 2 is a flow chart showing the operation sequence of position search, and FIG. 3 is a display board at the time of position search. Fig. 4 is a model diagram of CR
T-display pattern, FIG. 5 is a model diagram showing how the CPU board writes data to the character control board, and FIGS. 6 and 7 are configuration diagrams showing an outline of the conventional apparatus. In the figure, 1 is a CRT display, 2 is a keyboard, 3 is a character processing device, 22 is a display board, and 23 is a display element.

Claims (1)

[Claims] 1. A display board in which a large number of display elements are arranged in a grid, a keyboard for inputting position data of display elements to be searched, and a CRT for displaying the input position data in characters to display a search position. A display, a character processing device that receives the input position data and performs a series of display processing, and a signal from the character processing device, and a display element in one column and one row that corresponds to the position data. A display element failure position search device for a large-sized display device, which is provided with a moving image processing device that gives a signal for turning on and off.