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Gate drive apparatus and blur eliminating method

A gate drive and display device technology, applied to instruments, static indicators, etc., can solve the problems of unable to quickly discharge charges, after-image after shutdown, etc.

Active Publication Date: 2013-04-17
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the liquid crystal display is turned off, the charge stored in the equivalent capacitance of the pixel cannot be quickly discharged, and the charge can only be released gradually by virtue of the leakage characteristics of the thin film transistor (TFT) in the pixel, thus causing Residual image occurs when the computer is turned off

Method used

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  • Gate drive apparatus and blur eliminating method

Examples

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no. 1 example

[0031] figure 1 A schematic diagram of a gate driving device according to an embodiment of the invention is shown. The gate driving device is suitable for a display device, such as a liquid crystal display device. Please refer to figure 1 , the gate driving device includes a voltage generator 110 , a voltage generator 120 , a voltage level shifter 130 , a gate driver 140 , a switch circuit 150 , a power rail 170 and a power rail 180 . The voltage generator 110 is electrically connected to the power rail 170 to output the voltage VGH to the power rail 170 . The voltage generator 120 is electrically connected to the power rail 180 to output the voltage VGL to the power rail 180 .

[0032] The above-mentioned voltage level shifter 130 is electrically connected to the power rails 170 and 180, and is used to convert the high and low levels of the clock pulse signal CLK1 output by the timing controller 160 to the levels of the voltages VGH and VGL respectively, so as to A clock ...

no. 2 example

[0039] figure 2 A schematic diagram of a gate driving device according to another embodiment of the present invention is shown. Please also refer to figure 2 and figure 1 , After comparing the two, it can be found that the difference between the two lies in the design of the switching circuit. Such as figure 2 As shown, the voltage generators 110 and 120 are electrically connected to the power rails 170 and 180 respectively through the switch circuit 250, and the switch circuit 250 is also used to determine whether to disconnect the voltage generators 110 and 120 from the power supply according to the shutdown detection signal XON. Trajectories 170 and 180.

[0040] In this example, the switch circuit 250 includes four switches, which are marked with 251 , 252 , 254 and 255 respectively. The switch 251 has a first end 251-1, a second end 251-2 and a control end 251-3, and its first end 251-1 is electrically connected to the power rail 170, and its control end 251-3 is ...

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Abstract

The utility model relates to a gate drive apparatus and a blur eliminating method. The gate drive apparatus comprises two power supply rail lines, two voltage generators, a voltage level converter, a gate driver and a switch circuit, wherein the two voltage generators are respectively and electrically connected with the two power supply rail lines, the voltage level converter is electrically connected with the two power supply rail lines, the gate driver is electrically connected with one power supply rail line and one voltage level converter to receive a voltage, third and fourth clock pulsesignals and to generate a gate pulse signal according to the voltage and the third and fourth clock pulse signals, the switch circuit is electrically connected with the two power supply rail lines, and the two power supply rail lines are mutually and electrically connected according to a shutdown detection signal of a display apparatus. The present invention can eliminate the blur of the display apparatus in the process of shutdown.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a gate driving device and a method for eliminating image sticking. Background technique [0002] A liquid crystal display (LCD) is a flat panel display device, which has the advantages of lightness, thinness, power saving, low radiation, etc., and is therefore widely used in various electronic devices. [0003] However, when the liquid crystal display is turned off, the charge stored in the equivalent capacitance of the pixel cannot be quickly discharged, and the charge can only be released gradually by virtue of the leakage characteristics of the thin film transistor (TFT) in the pixel, thus causing Residual image occurs when the computer is turned off. Contents of the invention [0004] The invention provides a gate driving device, which can eliminate the afterimage when the display device is turned off. [0005] The present invention further provides a method for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36
Inventor 郑诗婷廖一遂
Owner AU OPTRONICS CORP