LCD module autoflicker automatic adjustment device

Abstract

The invention discloses an Auto-flicker automatic tuning device of a liquid crystal module. The Auto-flicker automatic tuning device of the liquid crystal module comprises a photoelectric sensor. An output end of the photoelectric sensor is connected with an input end of a signal processing module, an output end of the signal processing module is connected with an input end of a signal self-adaptation module, the signal self-adaptation module is connected with an MCU control module through an analog-digital conversion module, and the photoelectric sensor is used for converting an optical signal received from a Flicker testing zone of the liquid crystal module into a current signal; the signal processing module comprises an I / V conversion circuit and a filtering circuit and is used for converting the received current signal into an analog voltage signal and filtering the analog voltage signal; the signal self-adaptation module comprises a signal amplifying circuit and a feedback circuit, the signal amplifying circuit is used for conducting amplification processing on the received analog voltage signal, and the feedback circuit is used for controlling the amplification times of the analog voltage signal; the analog-digital conversion module is used for converting the analog voltage signal into a digital voltage signal; the MCU control module is used for logic control and outputting the digital voltage signal.

Description

technical field [0001] The invention relates to the field of liquid crystal modules, in particular to a liquid crystal module Autoflicker automatic adjustment device. Background technique [0002] V-COM (Voltage of Common electrode, common electrode voltage) is a voltage value at the panel terminal of the liquid crystal module. It is determined by the characteristics of the liquid crystal and the working principle of the liquid crystal module. There is a positive and negative deflection voltage in the panel driving circuit. V-COM needs to be set at The center point of the positive and negative deflection voltage, by adjusting the value of V-COM, we can adjust the Flicker value of the Panel to the minimum, so that the display effect of the Panel can reach the best. Only relying on the human eye to observe and adjust the V-COM voltage will cause deviations. For several higher frequencies such as 120Hz and 240Hz, people cannot use the naked eye to adjust the Flicker (flicker) v...

AI Technical Summary

Problems solved by technology

Only relying on human eyes to observe and adjust the V-COM voltage will cause deviations. For several higher frequencies such as 120Hz and 240Hz, people cannot use the naked eye to adjust the Flicker (flicker) value

[0003] In recent years, some liquid crystal module Flicker value measurement devices that can be used in production lines have appeared on the market, freeing people from the embarrassing situation of using the naked eye to adjust the Flicker value of liquid crystal modules. Single, can not adjust the Flicker value of multiple panels at the same time, some of the Flicker value measuring devices can only measure the Flicker value of the LCD module and cannot automatically adjust, resulting in low efficiency and cost of adjusting the Flicker value of the LCD module in the production line big investment

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