Driving method and driving circuit of liquid crystal display panel and display device

Abstract

The invention provides a driving method and circuit of a liquid crystal display panel and a display device, and belongs to the technical field of display. The method comprises the following steps: sending a common electrode signal to a common electrode wire of the liquid crystal display panel, wherein a common voltage signal passing through the common electrode wire is reversed between a first common voltage and a second common voltage in K frames, the polarities of the first common voltage and the second common voltage relative to a reference voltage are opposite, and K is an integer greaterthan 1. According to the technical scheme, the color gamut of the display equipment can be improved, the dynamic power consumption of a circuit system is reduced, and EMI is reduced.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a driving method, a driving circuit and a display device of a liquid crystal display panel. Background technique [0002] In the liquid crystal display panel of the related art, a higher driving voltage is required to drive the liquid crystal to flip. Since the data voltage transmitted on the data line cannot meet the requirements of the driving voltage, it is necessary to use a public voltage signal flipping method to increase the driving voltage. The inversion frequency of the voltage signal is the frame frequency. Due to the polarity inversion of adjacent frames, the voltage of the liquid crystal capacitor plate will change greatly, resulting in a longer charge and discharge time, which compresses the lighting time, resulting in a lower color gamut of the liquid crystal display panel. Moreover, the inversion of the common voltage signal will lead to high dynamic power consump...

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Problems solved by technology

[0002] In the liquid crystal display panel of the related art, a higher driving voltage is required to drive the liquid crystal to flip. Since the data voltage transmitted on the data line cannot meet the requirements of the driving voltage, it is necessary to use a public voltage signal flipping method to increase the driving voltage. The inversion frequency of the voltage signal is the frame frequency. Due to the polarity inversion of adjacent frames, the voltage of the liquid crystal capacitor plate will change greatly, resulting in a longer charge and discharge time, which compresses the lighting time, resulting in a lower color gamut of the liquid crystal display panel. Moreover, the inversion of the common voltage signal will lead to high dynamic power consumption of the circuit system, and will also cause EMI (Electro Magnetic Interference, electromagnetic interference) to other electrical signals.

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