Shutdown discharging method and circuit of LCD (liquid crystal display) panel

Abstract

The invention provides a shutdown discharging method and circuit of an LCD panel, the method comprises the following steps that when the LCD panel starts to shut down, grid signals on a scanning lineare kept in the set time period, and the electric potential of the input end of a PCBA circuit board of the LCD panel is kept; in the set time period, data signals on a data line are adjusted, the potential difference between a pixel electrode in the LCD panel and a common electrode of a color film substrate is kept in the set voltage difference range, and the LCD panel displays a black picture; after the set time period, the LCD panel is controlled to discharge. According to the shutdown discharging method and circuit of the LCD panel, when the LCD panel shuts down, poor shutdown displaying of the LCD panel cannot be observed by the user.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a shutdown discharge method and circuit of a liquid crystal display panel. Background technique [0002] In today's information society, TFT-LCD (hin film transistor-liquid crystal display, thin film transistor liquid crystal display) panels have been widely used in all aspects of our lives, from small-sized mobile phones, video cameras, digital cameras, medium-sized notebook computers, desktop Machines, large-size household TVs, and large-scale projection equipment, etc., TFT-LCD panels are light and thin on the basis of advantages, plus perfect picture and fast response characteristics, ensuring that it is the leader in the display market. [0003] In an active matrix liquid crystal display, each pixel has a thin film transistor (TFT), its gate (gate) is connected to the scanning line in the horizontal direction, the drain (drain) is connected to the data line in the vertical ...

AI Technical Summary

Problems solved by technology

However, when the pixel starts the discharge function, all gate signals in the liquid crystal display panel should be pulled to a high potential. For the GOA liquid crystal display panel, the condition for pulling the gate signal high is that all CK signals (clock signals) They are always kept at a high potential, so the CK signal has to carry the turn-on control of the entire LCD panel, which will cause the CK signal load to be too large, and then cause the gate signal to be unable to be pulled to a high potential, so that the pixels of the entire LCD panel cannot be effectively turned on. Therefore, the discharge process of the liquid crystal display panel will last for a long time, so that the user can observe that the display is not good due to the shutdown discharge.

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