Method for adjusting common voltage of liquid crystal panel

Abstract

The invention provides a method for adjusting the common voltage of a liquid crystal display panel. According to the method, a red optimal common voltage, a green optimal common voltage and a blue optimal common voltage corresponding to a red flicker test image, a green flicker test image and a blue flicker test image are respectively found out; a red brightness weighting factor, a green brightness weighting factor and a blue brightness weighting factor respectively corresponding to a red pure-color image, a green pure-color image and a blue pure-color image are introduced, so that the optimal common voltage of the liquid crystal display panel can be calculated. With the method adopted, when the optimal common voltages of the liquid crystal display panel which are respectively corresponding to the red image, the green image and the blue image are inconsistent, difference among the optimal common voltages of the red image, the green image and the blue image can be offset through the red brightness weighting factor, the green brightness weighting factor and the blue brightness weighting factor, and therefore, the optimal common voltage of the liquid crystal display panel can be found out simply and conveniently, and the deviation of the optimal common voltage which is caused by the difference of response sensitivity of a photosensitive probe to light in different wave lengths can be decreased.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a method for adjusting the common voltage of a liquid crystal panel. Background technique [0002] Liquid Crystal Display (LCD) has many advantages such as thin body, power saving, and no radiation, and has been widely used, such as: LCD TV, mobile phone, personal digital assistant (PDA), digital camera, computer screen or Laptop screens, etc., dominate the field of flat panel displays. [0003] Most of the liquid crystal displays currently on the market are backlight liquid crystal displays, which include a liquid crystal panel and a backlight module. The working principle of the liquid crystal panel is to pour liquid crystal molecules between the thin film transistor array substrate (Thin FilmTransistor Array Substrate, TFT Array Substrate) and the color filter substrate (Color Filter, CF), and apply a driving voltage on the two substrates to Control the rotation direction o...

AI Technical Summary

Problems solved by technology

In practical applications, there are cases where the optimal common voltages of the liquid crystal panels corresponding to the red R, green G, and blue B screens are inconsistent. Due to the difference in response sensitivity of the photodiode to the three color screens of R, G, and B, the synthesized in There will be a deviation between the optimal common voltage corresponding to the minimum flicker found in the grayscale screen and the actual optimal common voltage, which will affect the display effect of the LCD panel and the shipment quality of the LCD panel

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