Automatic detection system and method for compatibility anomaly of display

Abstract

The invention relates to an automatic detection system and a method for the compatibility anomaly of a display. The system comprises an industrial PC, a photoelectric signal acquisition unit, a flicker signal processing unit, a Chroma signal source and a burning plate. The burning process of the display is completed through the on-line system programming process, and a related display control instruction is defined in the form of an array. After that, the software control for the OSD menu of the display is realized based on the DDC / CI protocol. Meanwhile, the "handshake" mechanism is added to ensure the reliability of control signals. At the same time, relevant test cases and the test timing are imported in the form of independent text files and excel files. Optical signals are acquired by a photoelectric sensor. The acquired signals are converted through the analog-to-digital conversion process and then a transient waveform is obtained. Furthermore, the transient waveform is subjected to the Fourier transform treatment to be converted into a power spectrum and the power spectrum is subjected to the human visual-sensitive weighted matching treatment. Finally, through the inverse Fourier transform treatment, the flicker degree is calculated. The system is high in degree of flexibility, low in cost, and high in efficiency. The test pressure of the test personnel can be reduced to a greater degree.

Description

technical field [0001] The invention relates to the field of display testing, in particular to an automatic detection system and method for display compatibility anomalies. Background technique [0002] Before the monitor leaves the factory, it needs to be strictly tested. One of the important tests is the compatibility test. When the monitor has a compatibility problem, it is often accompanied by abnormal flickering of the screen, and even a black screen with no picture in severe cases. With the maturity of information display technology, the functions of flat panel displays are constantly enriched, various signal standards are increased, and the resolution is also continuously improved, which undoubtedly greatly increases the amount of testing. [0003] At present, most display manufacturers still use manual testing, and the testing process is roughly as follows: First, you need to manually click the display button to perform various switching settings on the OSD menu, th...

AI Technical Summary

Problems solved by technology

For example: using infrared remote control to replace the cumbersome setting steps of the "five-way key" when setting the display, but still inseparable from human control; using PC to control the instrument to read and record test data, but only applicable to specific models and established Test cases, low flexibility, and because optical testers are expensive, only available in small quantities, frequent instrument shortages

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