Display device and method for eliminating residual image after shutdown

Abstract

The present application provides a display device and its method for eliminating after-image after shutdown. The display device includes: a display panel; a gamma voltage generation unit electrically coupled to the display panel through a plurality of gamma voltage lines, and the plurality of gamma The voltage circuit includes a black screen control circuit and a grayscale control circuit; a control unit is arranged on the grayscale control circuit and connected to the power supply unit; the power supply unit provides power and transmits control signals to the control unit; wherein, the When the control unit obtains the control signal as the first potential, the control unit switches the line state to form a path between the gamma voltage generating unit and the display panel; the control unit obtains the control signal as the second potential. potential, the control unit switches the line state to form an open circuit of the gray scale control line, the black picture control line is a path, and the gamma voltage generating unit provides a control voltage corresponding to the black picture control line to the A display panel, where the display panel presents a black picture.

Description

technical field [0001] The present application relates to a method for eliminating image sticking, in particular to a display device and a method for eliminating image sticking after shutdown. Background technique [0002] Liquid crystal display (Liquid Crystal Display, LCD) has been widely used recently. With the improvement of drive technology, it has the advantages of low power consumption, thin and light weight, and low voltage drive. It has been widely used in video recording and playback Video machines, notebook computers, desktop monitors and various projection equipment. [0003] And the liquid crystal display device usually has a gate driving unit, a source driving circuit and a pixel array. There are multiple pixel circuits in the pixel array, and each pixel circuit is turned on and off according to the scan signal provided by the gate drive unit, and displays a data picture according to the data signal provided by the source drive circuit. [0004] Due to the li...

AI Technical Summary

Problems solved by technology

[0004] Due to the limitation of liquid crystal charging and discharging speed, some charges may remain on the liquid crystal panel when it is turned off, which may cause the human eye to see after-image after power off

The current common practice is to generate a control signal when the power is turned off, so that the second driver chip (Gate Driver) turns on the TFT switches of all channels at the same time, hoping to let the charge be released as soon as possible, but at this time due to the first driver chip (Data Driver) ) output is uncertain, so the discharge effect will vary with the display data of the screen, so this method cannot guarantee to completely eliminate the residual charge. Therefore, how to improve the above-mentioned conventional second driver chip (Gate Driver) There is a lack of technology when discharging liquid crystal panels, so a method for eliminating residual image after shutdown with low production cost and easy processing is proposed

Images