Display device and panel driving circuit and charge discharge method thereof

A panel drive circuit, display panel technology, applied in static indicators, instruments, etc., can solve problems such as inability to effectively release pixel capacitance and short XON time.

Active Publication Date: 2022-07-08
FUZHOU BOE OPTOELECTRONICS TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present disclosure provide a display device, its panel drive circuit, and a charge discharge method, which can solve the problem in the related art that the residual charge in the pixel capacitor cannot be effectively released due to the short XON time. The technical solution is as follows:

Method used

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  • Display device and panel driving circuit and charge discharge method thereof
  • Display device and panel driving circuit and charge discharge method thereof
  • Display device and panel driving circuit and charge discharge method thereof

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Embodiment Construction

[0070] In order to make the objectives, technical solutions and advantages of the present disclosure clearer, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0071] refer to figure 1 , each pixel in an LCD panel generally includes oppositely disposed pixel electrodes, a common electrode VCOM, and a liquid crystal located between the pixel electrode and the common electrode VCOM. Moreover, the pixel electrode and the common electrode VCOM can also form a pixel capacitance. The liquid crystal can be deflected under the action of the voltage difference between the pixel electrode and the common electrode VCOM, so that the display panel emits light. Also, each pixel typically also includes a transistor TFT. A gate electrode G of the transistor TFT may be coupled (ie, electrically connected) with a gate scan line, ie, a gate line. A source electrode S of the transistor TFT may be coupled to a data...

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Abstract

The invention provides a display device and a panel driving circuit and a charge discharge method thereof, and belongs to the technical field of display. The panel driving circuit comprises a panel control circuit and a display driving circuit. When the display panel is shut down, the panel control circuit can sequentially transmit at least one of a display driving signal and a charge discharge signal to the display driving circuit before the potential of a power supply signal is powered down to be smaller than a potential threshold value. The display driving circuit sequentially executes at least one operation of controlling the display panel to display a monochromatic second picture and discharging charges in advance. Therefore, before the potential of the power supply signal is powered down to be smaller than the potential threshold and enters the conventional XON, the charge can be discharged in advance, so that the residual charge in the pixel can be effectively released.

Description

technical field [0001] The present disclosure relates to the field of display technology, and in particular, to a display device, a panel driving circuit thereof, and a charge discharge method. Background technique [0002] In a liquid crystal display (LCD) panel, a pixel capacitor formed by a pixel electrode and a common electrode stores charges during a display process. After testing, if there is still residual charge in the pixel capacitor for a certain period of time after the LCD panel stops displaying (ie, is turned off), it will cause an afterimage on the LCD panel. [0003] Based on this, usually when the LCD panel is turned off, the thin film transistors (TFTs) included in each pixel in the LCD panel are controlled to be turned on at the same time for a certain period of time to discharge the charges stored in the pixel capacitors and prevent the LCD panel from appearing afterimages. , this function is generally called XON (out all on). At present, the XON process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG09G3/36G09G2310/0264G09G2310/0243G09G2330/04
Inventor 陈锦峰刘娜妮苏毅烽孔小丽林启标王巧妮黄哲
Owner FUZHOU BOE OPTOELECTRONICS TECH CO LTD
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