Display driving circuit, display unit and driving method thereof

A display drive and circuit technology, applied in static indicators, instruments, etc., can solve problems such as affecting the light transmittance and brightness of liquid crystal display devices, flickering liquid crystal display devices, and affecting the quality of screen display, so as to improve display quality and avoid problems. The effect of potential difference

Inactive Publication Date: 2013-07-31
BOE TECH GRP CO LTD +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the existence of the feedthrough effect, the potential Vd of the drain of the TFT decreases, and the potential of the pixel electrode connected to the drain of the TFT also decreases, so that the voltage between the pixel electrode voltage (that is, Vd) and the common electrode voltage Vcom The difference will be lower than the preset voltage difference, thereby affecting the deflection of the liquid crystal molecules, and further affecting the light transmittance and brightness of the liquid crystal display device, causing the liquid crystal display device to flicker, seriously affecting the display quality of the screen

Method used

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  • Display driving circuit, display unit and driving method thereof
  • Display driving circuit, display unit and driving method thereof
  • Display driving circuit, display unit and driving method thereof

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Embodiment Construction

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.

[0021] The display driving circuit provided by the embodiment of the present invention, such as figure 2 As shown, it includes: a gate drive unit 21 for controlling the turn-on of the thin film transistor TFT, a source drive unit 22 for outputting a signal to the source of the TFT, and a circuit unit 23 for supplying power to the common electrode.

[0022] Wherein, when the TFT is in the on state, the circuit unit 23 outputs the first voltage to the common electrode; when the TFT is in the o...

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Abstract

The embodiment of the invention provides a display driving circuit, a display unit and a driving method thereof, relates to the technical field of displaying, can prevent the feed-through effect from influencing the potential differences between pixel electrodes and a common electrode, and can improve the displaying quality of a picture. The display driving circuit comprises a gate driving unit, a source driving unit and a circuit unit, wherein, the gate driving unit is used for controlling a TFT (Thin Film Transistor) to be switched on; the source driving unit is used for outputting signals to a source electrode of the TFT; the circuit unit is used for supplying electricity to the common electrode; when the TFT is switched on, the circuit unit outputs a first voltage to the common electrode; when the TFT is switched off, the circuit unit outputs a second voltage to the common electrode; and in addition, the first voltage is different from the second voltage.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a display driving circuit, a display device and a driving method thereof. Background technique [0002] With the continuous development of TFT-LCD (Thin Film Transistor-Liquid Crystal Display, Thin Film Field Effect Transistor-Liquid Crystal Display) technology, how to improve the display quality of the display device has increasingly become the focus of attention. [0003] For the existing TFT liquid crystal display device, when the TFT is turned off, the potential of the drain electrode of the TFT drops suddenly compared with the source electrode, and the potential difference between the pixel electrode and the common electrode will inevitably produce a very steep voltage jump. change, the waveform of each voltage signal can be as figure 1 As shown, wherein, when the TFT gate voltage Vg outputs a low level, the TFT drain voltage Vd will suddenly decrease compared with...

Claims

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Application Information

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IPC IPC(8): G09G3/36
CPCG09G3/36G09G3/3696G09G3/3648G09G3/3655G09G2310/06G09G2320/0219G09G2320/0247G09G2330/027
Inventor 汪建明张亮许益祯
Owner BOE TECH GRP CO LTD
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