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Shadow elimination circuit and display device

A display device, a technology for eliminating circuits, applied in static indicators, nonlinear optics, instruments, etc., can solve the problems of high cost of liquid crystal displays and complex gate drive circuits.

Active Publication Date: 2017-07-14
HKC CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing gate drive circuit with XAO signal is more complicated, resulting in higher cost of liquid crystal display

Method used

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  • Shadow elimination circuit and display device

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Embodiment Construction

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0036] See figure 1 , figure 1 It is a schematic diagram of an afterimage elimination circuit provided by an embodiment of the present invention. The residual image circuit can be integrated in the gate drive unit of the display device to eliminate some residual images of the display device when the display device is turned off, that is, the residual image after shutdown.

[0037] The power-off afterimage is due to the fact that the display device will accumulat...

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Abstract

The invention discloses a shadow elimination circuit and a display device. The shadow elimination circuit includes a detection unit and a control unit, the detection unit generates a control signal after detecting that the display device is turned off; the control unit is connected with the detection unit and controls the gate driving unit of the display device so that the gate low level outputted by the gate driving unit is a preset level while receiving the control signal, wherein the preset level turns on the active switch of the display device. When the display device is turned off, the gate low level is the preset level, the active switch is normally open, the discharging of the LCD capacitor and the storage capacitor of the display device is accelerated, and the phenomenon of shutdown blur can be eliminated, meanwhile, the detection unit and the control unit can be realized by a comparator and a field effect transistor. Therefore, compared with the existing gate driving circuit with XAO (Output ALL-ON Control, signal forced pull, also known as XON) signal, the shadow elimination circuit reduces the cost of the display device.

Description

Technical field [0001] The present invention relates to the field of display technology, in particular to a residual image elimination circuit and a display device. Background technique [0002] At present, liquid crystal displays are the mainstream displays, and electronic devices such as computers, mobile phones, and televisions all require liquid crystal displays. However, due to the working mechanism of the liquid crystal capacitors and storage capacitors of the liquid crystal panel, the capacitance in the liquid crystal panel cannot be effectively released when the liquid crystal display is shut down, which will leave a residual image on the display screen and cause a shutdown image problem. [0003] In order to solve the problem of shutdown image retention, there are many types of image retention elimination circuits in the prior art. A common circuit is to use the XAO (Output ALL-ON Control) of the gate drive unit to force the signal to be pulled high, also called XON. ) Si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG09G3/36G09G2320/0257G09G2330/027G09G2310/0245G09G3/3648G02F1/1368G09G2330/02
Inventor 陈猷仁
Owner HKC CORP LTD
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