Flickering debug method and device of liquid crystal display panel

Abstract

The embodiment of the invention provides a flickering debug method and device of a liquid crystal display panel, pertaining to the technical field of display. By adjusting gray-scale voltage, flickering values of display images corresponding to multiple gray scales are minimized so that the possibility of flickering on display images during full gray-scale display is reduced. The flickering debug method comprises the following steps: applying initial common voltage to a common electrode and obtaining multiple sampling gray-scale voltage and one specific gray-scale voltage meeting the gamma curve; regulating voltage applied to the common electrode to determine that the common electrode when the display images are at the minimum flickering values is obtained on the condition that specific gray-scale voltage is applied to pixel electrodes; adjusting at least one sampling gray-scale voltage in obtained gray-scale voltage, measuring the flickering value of corresponding display images and taking gray-scale voltage corresponding to the minimum flicking value of corresponding display images as gamma reference voltage of corresponding gray scales.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a method and device for debugging the flicker of a liquid crystal display panel. Background technique [0002] In a Liquid Crystal Display (LCD for short), the pixel voltage Vn applied to the pixel electrode varies up and down with the common voltage Vcom applied to the common electrode, as shown in figure 1 As shown, the pixel voltages V0-V255 correspond to gray scale 0 to gray scale 255, wherein, when the pixel voltage is greater than the common voltage Vcom, the pixel is positive; when the pixel voltage is lower than the common voltage Vcom, the pixel is negative. For the pixel voltage corresponding to each gray scale, the two frames before and after are greater than the common voltage Vcom and greater than the common voltage Vcom, and the absolute value of the difference between the signal voltage of the two frames before and after and the common voltage Vcom is the same, so...

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Problems solved by technology

[0003] However, due to differences in LCD manufacturing processes and the influence of impurity ions in the liquid crystal cell, the above-mentioned common voltage Vcom has a certain offset in the actual display, that is, there is an offset voltage between the actual common voltage and the theoretical common voltage △V, when the liquid crystal panel is used for display, especially for some special industries (instrument panel, long-time display instrument, map, etc.), it will seriously affect the normal flip of the liquid crystal molecules in the liquid crystal cell, which will easily lead to the When a gray-scale voltage (including positive gray-scale voltage and negative polarity gray-scale voltage) is applied to the display panel, the brightness of the display screen corresponding to the positive polarity gray-scale voltage and the negative polarity gray-scale voltage will be different, and the display screen will flicker, which will cause afterimage phenomenon

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