EDID (extended display identification data)-integrated display frame deviation detecting system and using method

Abstract

The invention relates to an EDID (extended display identification data)-integrated display frame deviation detecting system and a using method. The EDID-integrated display frame deviation detecting system comprises a PC (personal computer), a signal generator, a CCD (charge coupled device) camera and a detected display. The PC is connected with a video interface of the detected display and used for reading EDID information of the detected display and judging and analyzing the EDID information and is further connected with the input end controlling the signal generator so as to control the signal generator to output proper detection images, the output end of the signal generator is connected with the detected display and outputs the detection images to be displayed on the detected display, the CCD camera is arranged near the detected display and aligned to the same for capturing the displayed detection images; the output end of the CCD camera is connected with the PC, and the PC reads the pictured detection images and is used for judging whether the images offset or not. Via EDID-integrated detection, the detection images in the optimal resolution rate are automatically output for different displays, and image offset is judged by machine vision technology instead of manual detection.

Description

technical field [0001] The invention relates to the field of display screen detection, in particular to a display screen offset detection system combined with EDID and a usage method. Background technique [0002] Judging whether the EDID programming is correct and the screen offset detection are two inspection items to be carried out when the monitor leaves the factory. The EDID contains basic information about the display, including vendor information, maximum image size, color settings, factory presets, frequency range limits, and strings for the display name and serial number. It must be tested before leaving the factory, and the EDID can be read through the IIC communication between the PC and the display, and a judgment should be made on it at the same time, whether there is a programming error. For different display interfaces, a special detection site must be set up. Detect the EDID of the corresponding interface. If some display has four interfaces of VGA, DP, H...

AI Technical Summary

Problems solved by technology

Different displays have different optimal resolutions. In order to ensure the reliability of the test results, it is necessary to set the signal generator in advance when producing different displays, which increases the workload. Misalignment needs to be realized manually, and manual detection will bring some unreliable factors, such as fatigue, which will lead to problems of missed detection and misjudgment

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