JPS6077593A - Display screen automatic test system - Google Patents

Abstract

PURPOSE:To check automatically and continuously the size of display screen by picking up the image of a prescribed pattern displayed on a display screen with a television camera, counting the dot number of image pickup screen and calculating the size of the display screen. CONSTITUTION:A display device 5 is mounted on a pallet 6 and moved to a position on a conveyor 7 up to a position opposite to a television camera 8. The camera 8 is suspended by a robot 9 and a lens of the camera 8 is fixed to a prescribed position and an angle opposite to a CRT1 of the device 5. A test equipment and a device with CRT are controlled by MPU control sections 10, 10' comprising a microprocessor unit and a prescribed pattern displayed on the screen of the CRT1 is picked up by the camera 8. The camera 8 is scanned as shown in, e.g., arrow C and the dot size from a point (a) to a point (d) is counted so as to calculate the size. Thus, the size is compared with the size of types informed from the device, and generation of the pattern 2 of a correct size is confirmed by the size from a point (b) to a point (c). Thus, the size is measured automatically and continuously.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a system for testing the screen of a device 2 having a display section, such as a word processor, CRT display device, etc., and particularly to automatic measurement of the dimensions of the display screen.

(B) What are the problems with conventional technology? The conventional method will be explained below with reference to FIG. 1 and the second factor.

Figure 1 is a perspective view showing a conventional test method, and Figure 2 is an enlarged view of section B in Figure 1. Conventionally, as a method for inspecting the display screen dimensions of a display unit, Generate a predetermined pattern 2 that displays the maximum outer frame on a display such as a CRT (cathode ray tube) 1.
Then, a scale 4 formed with the same external dimensions as the CRTI and displaying a frame 3 with the same shape and dimensions as the predetermined pattern 2 was pressed against the CRTI and visually checked to see if pattern 2 and frame 3 matched. .

As shown in Fig. 2, the frame 3 has dimension lines on the left and right in 1-brocade steps as a standard fIlto, and the person in charge of inspection checks how the pattern 2 deviates from the standard dimension and determines whether it is good or bad. 〇However, with this test method, each person presses one Kuscale 4 onto the CRT screen, making it inefficient and many errors occur. There were also problems that were considered undesirable in terms of management.

0 OBJECTS OF THE INVENTION The present invention solves the above-mentioned drawbacks and provides an automatic display double-sided testing system that can perform automatic and continuous inspection work. Display device i
A display screen automatic test method used in an automatic test system for II screens, which divides the image receiving screen of a television camera facing the display screen into a predetermined number of dots, and images a predetermined pattern of the display screen with the television camera, That photo! ! The display screen size is calculated by counting the number of dots on the screen.

B) Additional Embodiments of the Invention An embodiment of the present invention will be described with reference to FIGS. 3 to 6. FIG. 3 is a perspective view illustrating an overview of the automatic display screen testing method of the present invention; FIG. 4 is a block diagram without showing 'IIIbX' in FIG. 3, FIG. 5 is a flowchart of FIGS. 3 and 4, and FIG. 6 is a front view showing a specific example of measurement.

As shown in FIG. 3, the display device 5 is placed on a pallet 6 and transported on a conveyor 7 to a position facing the television camera 8. The television camera 8 is suspended from the robot 9VC, and The lens is fixed at a predetermined position and angle facing the CRTI of the display device 5.

The configuration and operation will be explained below with reference to FIGS. 4 and 5.

First, the configuration is divided into a testing machine and a device section with a CRT.

Both of them are in charge of a control section 10 and lo' consisting of a microprocessor unit (hereinafter referred to as MPU), and all control is carried out by instructions from the main section.

The test machine uses a pulse motor to zoom, focus, and print the TV camera 8! , l'M-control r
Camera control unit 11. It also includes a video memory L2 for recording the camera settings, and is further provided with an interface 13 for connection to a CRT-equipped device.

On the other hand, the device with a CRT is equipped with a display control section 14 that controls the display of the CRTI screen, and an interface 13 that connects with the IO interface 13 on the testing machine side.

If we explain the motion tL according to Fig. 5 in such a configuration,
First the device ttIllll custard and MPU control it.

A pattern 2 with the largest outer frame as shown is generated.

Then, through the IO Ink-Face 13, the v/M machine is notified that the screen has been displayed on the CRTI, the machine data of the device, and various parameters necessary for the test.
Mitsu Machine Organic 1/11 starts and waits for the above screen display to arrive from device f111, but as soon as it confirms that this has arrived, the received data and retest parameters are changed to MPU control g ( Set the test parameters to 110. In this case, for example, the characteristics of the device change depending on the model, so test parameters corresponding to each model are prepared.

In the present invention, the image capturing screen of the television camera 8 is divided into 512 lines vertically and 512 lines horizontally. In other words, the screen is 512x51
It is divided into 2 dots 0, so the video memory 12
The dimensions of which of the above divided regions is occupied by the 1ilj image can be calculated by counting the number of dots in the occupied regions. By comparing this calculated dimension with the allowable occupation area dimension based on the set test parameters as a reference value, it is possible to determine whether the displayed image is normal or abnormal. The data of the judgment results are set in the MPU 1tit control unit io and sent to the installed MPU via the IO interface 13 and device side interface 13.
It is output to the control section 10. The device side depends on the notified result, and if it is normal, the data is normal.
The program is recorded in the control unit 10 and the program is idling state Q.
It becomes f+ and ends with waiting for the first test.

On the other hand, if an abnormality is notified, the abnormal data is controlled by the MPU.
At the same time as recording in to, the defect content is displayed on the CG'RT screen, and the operator is notified by a buzzer or the like, and the process ends.

On the testing machine side, after outputting the results from the IO interface 13, each yuzu-related data such as normal or abnormal is recorded in the MPU control StO and the process ends, but only in the case of an abnormality, the operator is notified with a buzzer etc. It ends from.

A specific example of measurement is shown in FIG. 6. First, assume that the television camera 8 captures an image as shown. At this time, the image is scanned from left to right as shown by arrow C, for example. Then, the dimensions are calculated by counting the number of dots from point a to point d, and the dimensions are similarly calculated by counting the number of dots from point b to point C. In order to improve the measurement accuracy, this calculation is performed multiple times and the average value is taken from point a to point d.
The device that detects the dimensions up to the point is device I 111! This is to check whether the dimensions of the machine pole match the dimensions of the machine pole notified from I. It is checked whether pattern 2 with the correct dimensions is generated by detecting the dimensions from point b to point C.

Also, to measure the vertical dimension of pattern 2, repeat scanning in the direction of arrow C from top to bottom as indicated by the arrow.
It is possible to calculate the dimensions by detecting the points and f points and counting the number of scanning lines (dots) between them. By applying this method, the dimensions of the display screen of the display device can be automatically and continuously measured, and measurements can also be made more accurately, which has an extremely large effect on improving work efficiency and quality control.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the conventional test method, Fig. 2 is an enlarged view of BW15 in Fig. 1, Fig. 3 is a perspective view illustrating the outline of the automatic display screen testing method of the present invention, and Fig. 4 is a perspective view showing the conventional test method. Figure 3 is a block diagram showing the formation, Figure 5 is a flow chart of Figures 3 and 4, and Figure 6 is a front view showing a specific example of measurement. , 3 is a frame, 4 is a scale, 5 is a display device, 8 is a television camera, to, to
is the MPU control unit, and LL is the camera control unit. 12 is a video memory, 13.13 is an IO interface, and 14 is a display control section. Nel @ 2nd

Claims (1)

[Claims] A device for measuring the display screen dimensions of a display device, comprising means for dividing an image receiving screen of a television camera provided facing the display screen into a predetermined number of dots, and a predetermined pattern displayed on the display screen is divided into a predetermined number of dots by the television camera. An automatic display screen testing method characterized in that the size of the display screen is calculated by taking an image with a screen and counting the number of dots on the imaged screen.