Picture flicker improvable liquid crystal display device and relevant driving method thereof

Abstract

The invention provides a picture flicker improvable liquid crystal display device and a relevant driving method thereof. The method adjusts the chamfering amplitude of a grid driving signal to reduce the picture flicker and comprises the steps of respectively providing a first grid driving signal and a second grid driving signal according to parasitic capacitance values of a first pixel and a second pixel. The first grid driving signal comprises a waveform descending edge descending from a high potential to a first potential, and the second grid driving signal comprises a waveform descending edge descending from a high potential to a second potential; when the parasitic capacitance value of the first pixel is larger than that of the second pixel, the first potential is lower than the second potential; when the parasitic capacitance value is substantially equal to that of the second pixel, the first potential is substantially equal to the second potential; and when the parasitic capacitance value of the first pixel is less than that of the second pixel, the first potential is higher than the second potential. The invention can effectively eliminate the picture flicker to improve the display quality through adjusting the common voltage.

Description

technical field [0001] The invention relates to a liquid crystal display and a related driving method, in particular to a liquid crystal display capable of improving screen flicker and a related driving method. Background technique [0002] Liquid crystal display (liquid crystal display, LCD) has the advantages of low radiation, small size and low energy consumption, and has gradually replaced the traditional cathode ray tube display (cathode ray tube display, CRT), so it is widely used in notebook computers, personal Information products such as digital assistants (personal digital assistant, PDA), flat-screen TVs, or mobile phones. The driving method of the traditional liquid crystal display is to use the source driver circuit (source driver) and the gate driver circuit (gate driver) to drive the pixels on the panel to display images. Since the cost of the source driver circuit is higher than that of the gate driver circuit, in order to To reduce the usage of the source d...

AI Technical Summary

Problems solved by technology

Even though the two types of pixel units PX L and PX R With the same design, it is also easy to cause different performances due to process offsets (for example, the offset of the first metal layer Metal 1 and the second metal layer Metal 2 will cause the pixel unit PX L and PX R have different C GD ), still produce different magnitudes of feedthrough voltage V FD

[0012] exist figure 2 and image 3 The driving method shown in the prior art reduces the gate voltage across the same range, although the effect of the feed-through voltage can be reduced, but the feed-through voltage of each pixel unit will still be different, so it is impossible to effectively adjust the common voltage Vcom to eliminate screen flickering

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