Method and device for eliminating power-off afterimage on panel

Abstract

The present application discloses a method for eliminating residual image after shutdown on the panel. The method for eliminating residual image after shutdown on the panel includes the following steps: obtaining the initial voltage of the data line and the set voltage of the reference electrode; when the display panel is powered off, obtaining the current voltage of the data line; and updating the set voltage of the reference electrode according to the initial voltage of the data line and the current voltage of the data line. The application also discloses a method and a device for eliminating afterimages after shutdown on the panel. Set the reference electrode in the control system to a set voltage that can be adjusted. When the display panel is turned off, the set voltage of the reference electrode is updated to reduce the clamping pressure between the voltage guideline of the data line and the set voltage of the reference electrode. Pixel structure The charge in the battery is effectively released, and the screen of the display panel becomes black, which solves the afterimage problem.

Description

technical field [0001] The present application relates to the field of display technology, in particular to a method and a device for eliminating afterimages after shutdown on a panel. Background technique [0002] In order to reduce the color shift of the liquid crystal display and increase the viewing angle range, the liquid crystal display is usually designed with a low color shift. The general approach is to increase the area of ​​pixels, and a pixel can generally be divided into 4 areas. However, if a pixel is divided into a main pixel area and a sub-pixel area, it can be increased to 8 areas, thereby improving the color shift and improving the viewing angle. Specifically, multiple different thin film transistors (Thin Film Transistor, TFT) are used to supply power to the pixel area (3T pixel design), that is, three TFTs are used to charge and discharge two pixel areas. When the gate (gateline) is turned on, charges are sent to the main pixel area and the sub pixel ar...

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Problems solved by technology

[0003] For the above-mentioned liquid crystal display with low color shift design, the level control signal (XON) function on the driving integrated circuit is used to turn on the thin film transistors of all pixel electrodes, so that the pixel area can be quickly discharged to solve the afterimage after shutdown When there is a problem, the gate is fully open and the charge sharing TFT is always on, the storage electrode (Array Com, ACom for short) is connected to the data line (data line), and the electric energy stored in the array flows to the data line, causing the data level to be raised or lowered, so , the clamping pressure between the voltage level of the data line and the voltage of the reference electrode (CF Com, referred to as CCom) is large, resulting in that the charge in the pixel area cannot be completely released, and the afterimage after power-off cannot be eliminated.

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