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A source driving device, its polarity inversion control method, and a liquid crystal display device

A technology of polarity inversion and source drive, applied in the field of liquid crystal display devices and source drive devices, which can solve the problems of image sticking, DC residual, etc.

Inactive Publication Date: 2019-07-30
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, an embodiment of the present invention provides a source driver device, its polarity inversion control method, and a liquid crystal display device to solve the problem of image sticking caused by DC residue in the existing 2D De-Interlace mode

Method used

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  • A source driving device, its polarity inversion control method, and a liquid crystal display device
  • A source driving device, its polarity inversion control method, and a liquid crystal display device
  • A source driving device, its polarity inversion control method, and a liquid crystal display device

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Embodiment Construction

[0039] The specific implementation manners of the source driver device, its polarity inversion control method and the liquid crystal display device provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0040] A source driving device provided by an embodiment of the present invention, such as figure 1 As shown, it specifically includes: a positive and negative polarity inversion control unit 100, and a polarity signal control unit 200; wherein,

[0041] The positive and negative polarity inversion control unit 100 specifically includes: a first channel selection module 101 connected in sequence, a positive voltage channel 102 and a negative voltage channel 103, and a second channel selection module 104; wherein the first channel selection module 101 is respectively It is connected to two signal input terminals a and b, and the second channel selection module 104 is connected to two signal output ter...

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Abstract

The invention discloses a source drive device, its polarity inversion control method and a liquid crystal display device. A polarity signal control unit is added to the source drive device, and the output terminal of the polarity signal control unit is connected to the positive and negative poles. The first channel selection module in the sex reversal control unit is connected to the control terminal of the second channel selection module. The trigger control signal input to the control terminal of the polarity signal control unit is used to control the inversion of the polarity inversion control signal output by the polarity signal control unit, specifically each time a trigger is input to the control terminal of the polarity signal control unit After controlling the signal, the polarity signal control unit will reverse the polarity of the originally output polarity inversion control signal and then output it, otherwise the polarity of the original output polarity inversion control signal will be maintained. The positive and negative polarity inversion control unit controls the polarity of the output signal according to the received polarity inversion control signal, so as to avoid the problem of DC residual and eliminate the image sticking phenomenon.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a source driving device, a polarity inversion control method thereof, and a liquid crystal display device. Background technique [0002] A thin film transistor liquid crystal display (TFT-LCD) uses the optical anisotropy and birefringence properties of liquid crystal molecules to display images. Specifically, according to the video signal, the electric field generated by the electrodes on the surface of the substrate changes the arrangement direction of the liquid crystal molecules, controls the light transmittance of the liquid crystal cell, and thus displays the picture. Generally, TFT-LCD is driven by the alternating voltage polarity method, in which the voltage polarity is alternated between adjacent liquid crystal cells and between continuous frame periods, in order to reduce the deterioration of liquid crystals and enable liquid crystals to Maintain normal c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36
CPCG09G3/3614G09G2320/0257G09G3/3685
Inventor 梁恒镇
Owner BOE TECH GRP CO LTD
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