LCD Module Tester Research And Application

With the development of domestic LCD market, corresponding detection methods are also the emphasis of research for the LCD manufacturers, many manufacturers are independent research for the test instrument, Some manufacturers specially developed test instrument from the purchase-related test equipment, but overall the traditional test way is relatively complicated, test content single, The equipment includes DC power, single-chip microcomputer test frame, multi-meters etc, It is a low efficiency, inaccurate test.This paper introduce a liquid crystal display (LCD) module (LCM) tester, including CPU microprocessors, D/A transformation circuit, A/D circuit, output driver circuit, parameter display screen, keyboard scan matrix circuit and current/voltage transform circuit etc, because used high-performance microprocessors CPU, high-precision AD/DA converter, signal conversion/decode circuit, the drive LCD monitor its work status, including LCD working current, back light current, back light voltage, contrast, show integrity, can the high-speed automatic of various LCM (LCD module) for all-round efficient testing, especially in testing institutions such as the mobile phone complex LCD module has obvious advantages.