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

A technology of a liquid crystal display panel and a driving method, which is applied in the field of a driving circuit and a display device, and a driving method of a liquid crystal display panel, and can solve the problems of long charging and discharging time for the voltage change of a liquid crystal capacitor plate, high dynamic power consumption of a circuit system, and color loss of a display panel. Low gamut and other issues, to achieve the effect of improving charging quality, increasing lighting time, and improving color gamut

Active Publication Date: 2019-10-18
BOE TECH GRP CO LTD
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  • Abstract
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AI Technical Summary

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

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Embodiment Construction

[0026] In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0027] The demand for transparent display in the market has always been relatively strong, and the color gamut of the liquid crystal display panel in the transparent display mode is relatively low, and the display mode of FSC (Field-Sequential Color, Field-Sequential Color) is adopted.

[0028] When the liquid crystal display panel in the transparent display mode includes red (R), green (G), and blue (B) three-color pixels, the timing diagram of the FSC display mode is as follows figure 1 As shown, the display time of each color picture includes three frames, and the data of three colors are sequentially written in the three frames, and each frame includes the data refresh writing phase (R-DATA, B-DATA, G-DATA) and In the backlight lig...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG09G3/3607G09G2320/0271
Inventor 刘宗民段立业王龙侯孟军黄继景吴琼马小惠
Owner BOE TECH GRP CO LTD
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