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Quick power-down circuit and display device

A circuit and fast technology, applied in static indicators, instruments, etc., can solve problems such as residue, slow discharge speed of common electrodes, and inability to release charges quickly

Active Publication Date: 2021-09-10
KUSN INFOVISION OPTOELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]However, because the discharge speed of the common electrode of the thin film transistor liquid crystal display is too slow, so that the charge cannot be released quickly after shutdown and remains in the liquid crystal capacitor. During the process, the user may see a power-off afterimage on the LCD panel

Method used

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  • Quick power-down circuit and display device

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Embodiment Construction

[0035] The present invention is further detailed in conjunction with the accompanying drawings and examples. It will be appreciated that the specific embodiments described herein are merely illustrative of the invention and are not limited thereto. It will also be noted that in order to facilitate the description, only the parts associated with the present invention are shown in the drawings rather than all structures.

[0036] figure 1 It is a schematic diagram of the pixel structure of the existing liquid crystal display panel, reference figure 1 The pixel structure in the existing liquid crystal display panel is constructed of a gate signal line SL, a common electrode Vcom, a liquid crystal capacitor CLC, and a storage capacitor CS connected to the switching transistor T, and the pixel electrode receive data signals. The common electrode receives a common electrode signal, and the liquid crystal molecules are applied to the electric field formed on the liquid crystal capacitor...

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Abstract

The embodiment of the invention discloses a quick power-down circuit and a display device. The quick power-down circuit comprises: a power supply unit which comprises a power supply input end and a power supply output end; a control unit which comprises a control input end and a control output end, wherein the control input end receives a first level signal provided by the display panel level conversion circuit, and the control unit is used for outputting a discharge control signal through the control output end according to the jump of the first level signal in the power-down state; a discharging unit which is electrically connected between the power supply output end and the grounding end, wherein the control end of the discharging unit is electrically connected with the control output end, and the discharge unit is used for switching from a cut-off state to a conducting state according to the discharge control signal. According to the embodiment of the invention, the problem that shutdown ghosting is easily caused due to slow discharge speed of the common electrode of the existing display panel is solved, charges in the common electrode can be rapidly led out, the rapid discharge effect is realized, the shutdown ghosting is effectively eliminated, and good user experience is ensured.

Description

Technical field [0001] Embodiments of the present invention relate to the field of display, and more particularly to a fast power-off circuitry and a display device. Background technique [0002] In recent years, the liquid crystal display device that forms a switching transistor in each pixel distributed in the liquid crystal panel in a matrix form is now widely used. The liquid crystal display device typically has a gate drive circuit, a source driving circuit, and a pixel array. There are a plurality of pixel circuits in the pixel array, and each pixel circuit is turned on and off according to the scan signal provided by the gate driving circuit, and the data screen is displayed according to the data signal provided by the source driving circuit. [0003] However, since the discharge speed of the common electrode of the thin film transistor liquid crystal display is too slow, the user may see the shutdown on the liquid crystal display panel during the liquid crystal capacitanc...

Claims

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Application Information

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IPC IPC(8): G09G3/36
CPCG09G3/3648G09G2320/0257
Inventor 王敏
Owner KUSN INFOVISION OPTOELECTRONICS
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