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A voltage compensation circuit and method for gate driver and liquid crystal display device

A gate driver and voltage compensation technology, which is applied in the direction of instruments, static indicators, nonlinear optics, etc., can solve problems such as uneven display and affecting display quality, so as to avoid voltage drop, improve display quality, and solve uneven display The effect of the phenomenon

Active Publication Date: 2016-03-30
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The voltage drop ΔV is likely to cause the phenomenon of display unevenness (mura) on the liquid crystal display panel 13, thereby affecting the display quality

Method used

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  • A voltage compensation circuit and method for gate driver and liquid crystal display device
  • A voltage compensation circuit and method for gate driver and liquid crystal display device
  • A voltage compensation circuit and method for gate driver and liquid crystal display device

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Embodiment Construction

[0018] figure 2 is a schematic structural diagram of the voltage compensation circuit of the gate driver according to the embodiment of the present invention. The voltage compensation circuit is arranged before the output terminal of the gate driver, and is used to adjust the voltage provided by the gate driver to the liquid crystal display panel. Preferably, one voltage compensation circuit is arranged on each gate driver. Such as figure 2 As shown, the voltage compensation circuit 20 of the gate driver of this embodiment includes a voltage adjustment unit 21 , a digital comparison and correction unit 22 and a voltage detection unit 23 .

[0019] The voltage detection unit 23 detects the input voltage V1 of the gate driver and sends it to the digital comparison and correction unit 22 . The digital comparison and correction unit 22 also receives the reference voltage provided by the timing controller 24 outside the gate driver, and compares the input voltage V1 with the re...

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Abstract

The invention disclosed the voltage compensation circuit and method of a gate drive, as well as LCD display device.The voltage compensation circuit includes the voltage detection unit, the number comparative elevated unit, and the voltage adjustment unit; the voltage detection unit detects the input voltage of the grille polar driver and transmits it to the digital comparison unit;The reference voltage provided, and the input voltage and reference voltage are compared to generate a corrected control signal to the voltage adjustment unit. The voltage adjustment unit adjusts the input voltage according to the corrected control signal and outputs the target voltage.LCD display panel.Through the above methods, the invention can adjust the scanning voltage transmitted to the grid drive to avoid the voltage drop between the output voltage of different gate drives, thereby solving uneven display of the liquid crystal display panel and improving the display quality.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a voltage compensation circuit of a gate driver, a voltage compensation method and a liquid crystal display device. Background technique [0002] Such as figure 1 As shown, in the conventional liquid crystal display device, the timing controller 12 controls the source driver 14 to drive the data lines of the liquid crystal display panel 13 , and controls the gate drivers 10 and 11 to drive the scanning lines of the liquid crystal display panel 13 . Wherein, the VGH voltage is the gate turn-on voltage, which is input to the gate drivers 10 and 11 through wiring, and transmitted to the liquid crystal display panel 13 through the gate drivers 10 and 11 . [0003] The resistors Rp1 and Rp2 are the wire resistances between the gate drivers. When the VGH voltage is transmitted through the wires, due to the voltage loss of the wire resistances, the scanning voltages tran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36
CPCG09G3/3677G09G3/3696G09G2320/0223G02F1/13306
Inventor 张峻恺吴智豪
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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