Public voltage driving method and device and display device

Abstract

The invention discloses a public voltage driving method. The method comprises the steps that the picture state of a current display picture is detected according to a preset sampling period, and a control signal is generated according to the picture state of the current display picture; and alternating current public voltage or direct current public voltage is generated according to the control signal. The invention further provides a public voltage driving device and a display device. The picture state of the current display picture is detected according to the preset sampling period. If thecurrent display picture is a dynamic picture, alternating current and direct current public voltage is generated according to the control signal. If the current display picture is a static picture, alternating current public voltage is generated according to the control signal to maintain voltage balance between liquid crystal positive and negative electrodes. Liquid crystal polarization is prevented, and the phenomenon of image-retention is improved.

Description

technical field [0001] The invention belongs to the field of displays, and more specifically relates to a common voltage driving method, device and display device. Background technique [0002] Liquid Crystal Display (LCD, Liquid Crystal Display) has the advantages of light, thin, small, low power consumption and low heat, which makes the liquid crystal display stand out among many different types of display devices, and is widely used, such as in computers, mobile phones and personal on modern information devices such as digital assistants. [0003] The liquid crystal display device is developed through the optical response generated by the driving voltage applied to the liquid crystal molecules on the liquid crystal display device, that is, the gray scale response. The gray scale response refers to the gradation of the driving voltage. Due to the limitations of the characteristics of the liquid crystal molecule material itself, Its development takes most of a frame. Ther...

AI Technical Summary

Problems solved by technology

When the display screen is a static screen, the liquid crystal voltage remains at the same voltage value. If the common electrode voltage is also fixed, long-term power supply will lead to polarization of the liquid crystal, resulting in residual image phenomenon

In order to improve the afterimage phenomenon, generally try to debug DCVCOM as much as possible to maintain the balance of the positive and negative voltages of the liquid crystal, but the effect is not good

Moreover, in the case of poor debugging conditions, it is necessary to reduce the specification card control to deal with it, which does not fundamentally solve the afterimage problem.

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