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Along with the development of the domestic LCD market, the corresponding detection method is one of the focus in the study of various LCD manufacturers, many manufacturers are self-made test equipment, parts manufacturers buy from tester company specialized do related test equipment, but overall the general method of module detection is relatively complex, test content, a single equipment including dc power supply, microcomputer test frame, multimeter, etc., low test efficiency and missed detection probability. This article describes A liquid crystal display module (LCM) tester, including CPU microprocessor, D/A conversion circuit, A/D conversion circuit, output driving circuit, parameters, display, keyboard scanning matrix circuit and current/voltage conversion circuit, the adoption of high performance microprocessor CPU, high precision AD/DA converter and signal conversion/decoding circuit, the drive LCD test at the same time the work of its working conditions, including liquid crystal display, back light, back light source current work pressure drop, contrast, display of integrity, can high speed automatic for all sorts of LCM (LCD module) for all-round high efficiency test, especially in the test phone institutions such as the complex of the small and medium size liquid crystal display module has A significant advantage.
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