Power-on/off residual image elimination circuit and method for eliminating power-on/off residual image

Abstract

The invention relates to a power-on / off residual image elimination circuit and a method for eliminating the power-on / off residual image. The on / off image afterimage elimination circuit includes a voltage detection module and a common signal writing module; the voltage detection module is used to detect whether the operating voltage is lower than the first threshold voltage during the startup process, and detect whether the operating voltage is lower than the first threshold voltage during the shutdown process. lower than the second threshold voltage; the common signal writing module is used to write a signal equal to the voltage of the common signal terminal at the same time into the data line when the operating voltage is lower than the first threshold voltage and lower than the second threshold voltage . In the process of power-on and power-off, the above-mentioned power-on and power-off residual image elimination circuit writes into the data line a signal whose voltage is equal to the voltage of the common signal terminal at the same time, so that the voltage on the common electrode and the pixel electrode are the same, and the voltage difference between the two is eliminated. The polarization of liquid crystal molecules, and the resulting afterimages and flickering defects can be avoided, thereby improving the display quality and prolonging the lifespan of devices in the display device.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a power-on / off residual image elimination circuit and a method for eliminating the power-on / off residual image. Background technique [0002] figure 1 It is a schematic diagram of a conventional liquid crystal display device. Such as figure 1 As shown, the liquid crystal display device includes a backlight 1 and a display panel 2; wherein, the backlight 1 provides light; the display panel 2 generally includes an array substrate 20 and a color filter substrate 21, and the array substrate 20 and the color filter substrate 21 are in a box, and the two A liquid crystal layer 22 is arranged between them; a pixel electrode and a common electrode are arranged on the array substrate 20 (the common electrode can also be arranged on the color filter substrate). In the display process, by writing the data signal to the pixel electrode and the VCOM signal to the common electrode, an elec...

AI Technical Summary

Problems solved by technology

The above-mentioned timing difference will cause a voltage difference between the pixel electrode and the common electrode, which will cause the liquid crystal molecules to be polarized during the power-on and power-off processes, resulting in afterimages and flickering, which will affect the display quality, and will also lead to the life of the devices in the display device. reduce

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