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A pixel driving circuit, its driving method, and a display device

A pixel driving circuit and driving circuit technology, applied in static indicators, instruments, etc., can solve the problems of slow release of accumulated charges and affect the visual experience of viewers, so as to improve the display effect, shorten the duration of afterimages, and improve the visual experience. Effect

Active Publication Date: 2019-11-01
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The slower the release speed of the accumulated charge, the longer the afterimage will appear, seriously affecting the viewer's visual experience

Method used

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  • A pixel driving circuit, its driving method, and a display device
  • A pixel driving circuit, its driving method, and a display device
  • A pixel driving circuit, its driving method, and a display device

Examples

Experimental program
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Effect test

Embodiment 1

[0050] This embodiment provides a pixel driving circuit, such as figure 1 and figure 2As shown, it includes a first reset circuit 1, a charging circuit 2, a second reset circuit 3, a drive circuit 4 and a drive tube T8, and also includes a pull-down circuit 5, which is connected to the first reset circuit 1; the first reset circuit 1, Both the driving circuit 4 and the charging circuit 2 are connected to the driving tube T8; the second reset circuit 3 and the driving circuit 4 are both connected to the anode of the light-emitting element D1; the driving circuit 4 is connected to the first potential signal ELVDD; the cathode of the light-emitting element D1 is connected to the second potential signal ELVSS. The first reset circuit 1 is used to reset the gate of the driving transistor T8 under the control of the reset signal RST, the fifth potential signal VINT1 and the third potential signal VGL. The charging circuit 2 is used to charge the gate of the drive transistor T8 un...

Embodiment 2

[0071] This embodiment provides a display device, including the pixel driving circuit in Embodiment 1.

[0072] By adopting the pixel driving circuit in Embodiment 1, the afterimage duration of the display device when the non-solid color display screen is switched during the display process is greatly shortened, thereby improving the display effect of the display device.

[0073] The display device provided by the present invention can be any product or component with a display function such as an OLED panel, an OLED TV, a monitor, a mobile phone, a navigator, and the like.

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Abstract

The invention provides a pixel driving circuit, a driving method thereof and a display device. The pixel driving circuit includes a first reset circuit, a charging circuit, a second reset circuit, a driving circuit and a driving tube, and further includes a pull-down circuit. The first reset circuit is used for resetting a gate of the driving tube. The charging circuit is used for charging the gate of the driving tube. The second reset circuit is used for resetting an anode of a light emitting element. The driving circuit is used for driving, together with the driving tube, the light emitting element to emit light. The pull-down circuit is used for pulling down the gate potential of the driving tube to increase the gate source voltage of the driving tube. By arranging the pull-down circuit, the pixel driving circuit can pull down the gate potential of the driving tube during the operation of the driving tube to increase the gate source voltage of the driving tube so that the charges accumulated on a mutual contact interface between an active layer and a gate insulating layer of the driving tube can be quickly released, thereby shortening the duration of a residual image appearing in the display process and improving the residual image phenomenon.

Description

technical field [0001] The present invention relates to the field of display technology, in particular, to a pixel driving circuit, a driving method thereof, and a display device. Background technique [0002] In the pixel driving circuit of an OLED (organic electroluminescent) display device, due to the hysteresis effect of the driving tube, OLED products will have afterimages during the display of non-solid color screen switching. When switching to a pure black screen, afterimages will appear. The afterimage will disappear after a period of time, but the duration of the afterimage of different OLED products is different due to the hysteresis effect of the driving tube. [0003] The hysteresis effect of the driving tube means that during the working process of the driving tube, a certain amount of charge will be accumulated on the contact interface between the active layer and the gate insulating layer. Afterimages appear when display screens are switched. The slower the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3208
CPCG09G3/3208G09G2320/0257
Inventor 邹祥祥羊振中高雪岭
Owner BOE TECH GRP CO LTD