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

A technology of pixel driving circuit and driving transistor, applied in static indicators, instruments, etc., can solve the problem of uneven light emission of AMOLED display

Active Publication Date: 2019-02-01
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a pixel driving circuit, its driving method, and a display device, which are used to solve the problem of uneven light emission of AMOLED displays caused by different threshold voltages of driving transistors

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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

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Embodiment Construction

[0043] In order to further illustrate the pixel driving circuit, its driving method, and the display device provided by the embodiments of the present invention, a detailed description will be given below in conjunction with the accompanying drawings.

[0044] see figure 1 and figure 2 , The pixel driving circuit provided by the embodiment of the present invention includes: a driving unit 8 (including a driving transistor Td), a first capacitor unit 6, a voltage maintaining unit 1, a data writing unit 2, a power supply control unit 3 and a reset compensation control unit 5; Wherein, the first pole of the driving transistor Td is connected to the light emitting unit 4, the first terminal of the first capacitor unit 6 is connected to the gate of the driving transistor Td, the first terminal of the voltage maintaining unit 1 is connected to the first level input terminal, The second end of the voltage maintaining unit 1 is connected to the second end of the first capacitor unit...

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Abstract

The invention discloses a pixel driving circuit, a driving method thereof, and a display device, and relates to the field of display technology, and aims to solve the problem of uneven light emission of an AMOLED display caused by different threshold voltages of driving transistors. The pixel driving circuit includes: a driving transistor, a first capacitor unit, a voltage maintaining unit, a data writing unit, a power supply control unit and a reset compensation control unit, and the reset compensation control unit is respectively connected to the reset compensation control terminal, the second pole of the driving transistor, The second terminal of the first capacitor unit is connected to the gate of the driving transistor and the reference voltage input terminal; the control unit is used for: during the reset period and the threshold compensation period, under the control of the reset compensation control terminal, the reference voltage input terminal is connected to the drive transistor. The gate is connected, and the second pole of the driving transistor is connected to the second terminal of the first capacitor unit. The pixel driving circuit provided by the present invention is used to drive the light emitting unit to emit light.

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] AMOLED (Active Matrix Organic Light-Emitting Diode, Active Matrix Organic Light-Emitting Diode) display has many advantages such as self-illumination, ultra-thin, fast response, high contrast, wide viewing angle, etc., and is currently a display device that has attracted widespread attention. [0003] An AMOLED display includes a plurality of pixels arranged in a matrix. Driving and controlling each pixel for grayscale display depends on the pixel driving circuit inside the pixel. The pixel driving circuit mainly includes: switching tube, capacitor, OLED (Organic Light-Emitting Diode , organic light-emitting diode) light-emitting devices, and drive transistors. When working, the driving transistor in each pixel drives the corresponding OLED light-emitting device to emi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3233
CPCG09G3/3233G09G2300/0819G09G2300/0861G09G2300/0852G09G2320/045G09G2320/0686G09G2310/0251G09G3/3258G09G2320/0233G09G2330/021
Inventor 徐映嵩
Owner BOE TECH GRP CO LTD