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Pixel driving circuit and driving method thereof, display panel and display device

A pixel driving circuit and circuit technology, applied in the field of pixel driving circuit and its driving method, display panel, and display device, capable of solving problems such as uneven brightness of the display panel, and achieving the effect of avoiding uneven display brightness

Inactive Publication Date: 2019-10-08
BOE TECH GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Embodiments of the present invention provide a pixel driving circuit and its driving method, a display panel, and a display device, which can solve problems such as uneven brightness of the display panel caused by the threshold voltage of the driving transistor

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  • Pixel driving circuit and driving method thereof, display panel and display device
  • Pixel driving circuit and driving method thereof, display panel and display device
  • Pixel driving circuit and driving method thereof, display panel and display device

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Embodiment Construction

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application shall have the usual meanings understood by those skilled in the field of the present invention. "First", "second" and similar words used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Comprising" or "comprising" and similar words m...

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Abstract

The embodiment of the invention provides a pixel driving circuit and a driving method thereof, a display panel and a display device, relates to the technical field of display. The circuit and the method can solve the problems of uneven brightness and the like caused by threshold voltage of a driving transistor. The pixel driving circuit comprises a switch sub-circuit and a compensation sub-circuit. The switch sub-circuit is configured to write the data voltage of the data voltage end into a first node under the control of the voltage of the first scanning end. The compensation sub-circuit is connected with the first node, the second scanning end, the first voltage end and the reference voltage end. The compensation sub-circuit is configured to close the driving transistor through voltage control of the second scanning end before the data voltage is written into the first node. And after the data voltage is written into the first node, the voltage of the first node is controlled by thevoltage of the second scanning end, the first voltage end and the reference voltage end to be adjusted from the data voltage to the intermediate control voltage and then adjusted to the compensation data voltage so as to compensate the threshold voltage of the driving transistor.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel driving circuit and a driving method thereof, a display panel, and a display device. Background technique [0002] Organic Light Emitting Diode (OLED) displays have attracted the attention of the market because of their advantages such as self-illumination, thinness, low power consumption, high contrast, high color gamut, and flexible display. Among them, AMOLED (Active-matrix OLED, Chinese full name: Active Matrix Organic Light-Emitting Diode) has been widely used in various electronic products including computers, mobile phones, etc. due to its low driving voltage and long life of light-emitting components. in electronic equipment. [0003] For the driving transistor in the pixel driving circuit of the AMOLED display panel, due to the difference in manufacturing process and long-term use, the threshold voltage of the driving transistor in different pixel drivi...

Claims

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Application Information

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IPC IPC(8): G09G3/3258
CPCG09G3/3258G09G3/3233G09G2320/045G09G2300/0861G09G2300/0852G09G3/3266G09G3/3291
Inventor 董甜
Owner BOE TECH GRP CO LTD
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