LCD module auto-flicker automatic adjustment method

Abstract

The invention discloses an Auto-Flicker automatic tuning method for a liquid crystal module. The Auto-Flicker automatic tuning method for the liquid crystal module includes the following steps that first, optical signals are converted into current signals; second, the current signals are converted into analog voltage signals, and the analog voltage signals are filtered; third, the filtered analog voltage signals are converted into digital voltage signals; fourth, V-COM values are written into a V-COM chip in sequence, every time a V-COM value is written in, a digital voltage signal is sampled, every eight values of the sampled data are averaged so as to obtain an average to serve as valid data, all the valid data of the sampled data undergo root-mean-square operation to obtain a Flicker value, and the Flicker value is made to correspond to the current V-COM value till Flicker values corresponding to all the V-COM values are obtained; fifth, the V-COM value corresponding to the maximum Flicker value is transmitted to the liquid crystal module. The Auto-Flicker automatic tuning method for the liquid crystal module is high in measurement accuracy and can be used for automatically tuning the V-COM values without a PC.

Description

technical field [0001] The invention relates to the field of liquid crystal modules, in particular to an Auto-Flicker automatic adjustment method for liquid crystal modules. 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 (fli...

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 and methods that can be used in the production line have appeared on the market, which makes people get rid of the embarrassing situation of using the naked eye to adjust the Flicker value of the liquid crystal module. The method must rely on the PC, and the automatic adjustment of Flicker cannot be performed without the PC, resulting in low efficiency and high cost of Flicker value adjustment of the LCD module in the production line.

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