Method for driving liquid crystal display panel in polarity-reversal mode and apparatus thereof

Abstract

The invention, which relates to the liquid crystal display panel driving technology field, discloses a method for driving a liquid crystal display panel in a polarity-reversal mode and an apparatus thereof. The method comprises the following steps that: four frames form a polarity-reversal driving period and any of the four frames with a polarity arrangement mode can be used as an initial frame; and a displayed image is scanned in the way of a right order or a reversed order of the four frames. Besides, polarity arrangement modes of the first frame and the third frame in the polarity-reversal driving period are identical and the polarities thereof are opposite; polarity arrangement modes of the second frame and the fourth frame are identical and the polarities are opposite; and the polarity arrangement mode of the first frame is different from the one of the second frame. In addition, the invention also provides an apparatus for realizing the method. According to the designed driving scheme, occurrences of scintillation and crosstalk phenomena that occur on a liquid crystal display panel when a certain picture is displayed can be reduced.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display panel driving, in particular to a polarity inversion driving method and device for a liquid crystal display panel. Background technique [0002] With the development of economy and technology, displays, especially liquid crystal flat panel display devices, are becoming more and more popular in computer, mobile device, multimedia and TV display. The coupling of the common electrode causes screen flicker and crosstalk caused by the fluctuation of the common voltage. The driving methods of the current LCD panel mostly adopt the polarity inversion methods of dot inversion, 2-dot inversion, and 1+2 dot inversion. For some special evaluation graphics, if the coupling effect of the data signal to the common electrode is relatively large, the common voltage cannot return to the normal value at the beginning of the next frame, which will cause flickering of the screen or serious crosstalk in...

AI Technical Summary

Problems solved by technology

for figure 1 In b, in the same frame, the data signal of some rows pulls up the voltage Vcom, and some rows pull it down. The process of Vcom being pulled down from top to bottom or from bottom to top will affect the input of the effective voltage of the next row of pixels. like figure 1 As shown in b, the Vcom of the first row is pulled high, and when the signal of the second row of pixels is written, the voltage difference of the pixel voltage of the sub-pixel G relative to Vcom is less than a predetermined value, and the pixel voltage of the sub-pixel R and B is lower than the predetermined value. The voltage difference of Vcom is greater than the predetermined value, which will cause the sub-pixel G to be brighter, and R and B to be darker, resulting in green crosstalk or color shift. more serious

[0004] figure 2 A, B, C, and D in A, B, C, and D respectively give several commonly used display patterns for evaluating flicker and crosstalk. Under the existing polarity inversion driving mode, there is always a pattern that will significantly deteriorate the flicker or crosstalk phenomenon.

Images