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

A technology for a pixel driving circuit and a display panel, which is applied in the field of pixel driving circuits, display devices, driving methods and display panels thereof, can solve the problems of low display precision, difficulty in accurately controlling the LED driving current in the display panel, etc., so as to improve the display precision Effect

Active Publication Date: 2020-04-17
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a pixel driving circuit, a driving method, a display panel, and a display device for the problem that it is difficult to accurately control the driving current of the LED in the display panel and the display accuracy is low by using the traditional driving circuit.

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

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Embodiment Construction

[0053] In order to have a clearer understanding of the technical features, purposes and effects of the present application, the specific implementation manners of the present application will now be described in detail with reference to the accompanying drawings.

[0054] Traditional pixel drive circuits such as figure 1 As shown in , it is a schematic diagram of a driving pixel circuit of a common micro light emitting diode or organic light emitting diode. This 2T1C pixel circuit mainly includes a thin film transistor T1 as a driving thin film transistor (TFT), a thin film transistor T2 as a switching thin film transistor, a storage capacitor C, and a light emitting diode LED. The light emitting diode LED can be a micro light emitting diode or an organic light emitting diode, a thin film transistor T2 is controlled by the scan signal SCAN of the corresponding row of pixels to control whether to input the corresponding data signal V data . With this pixel circuit, during the...

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Abstract

The invention discloses a pixel driving circuit, a driving method, a display panel thereof and a display device. The pixel driving circuit comprises a first thin film transistor, a second thin film transistor, a first capacitor, a third thin film transistor, a second capacitor, a fourth thin film transistor, a third capacitor and a light emitting diode, wherein the gate electrode of the fourth thin film transistor is used for accessing scanning signals of the (N+2)th row of pixels, the source electrode is connected with a third node and a fourth node, and the drain electrode is connected witha second node. By controlling the on-off of the second thin film transistor, the third thin film transistor and the fourth thin film transistor, two-stage capacitor discharge and charge distribution among capacitors (the first capacitor, the second capacitor and the third capacitor) can be carried out, the driving current of a light emitting diode in the display panel can be accurately controlled,and the display precision is further improved.

Description

technical field [0001] The present application relates to the field of display technology, and more specifically, to a pixel driving circuit, a driving method, a display panel thereof, and a display device. Background technique [0002] With the development of display devices, driving circuits for display devices have become an important research hotspot. For a display device driven by a current mode, its luminous brightness depends on the gate-source current flowing through the Driving TFT (driving thin film transistor). For example, if a traditional drive circuit is applied to a Micro LED display panel, the luminance-current curve of the LED has a large slope, and a slight change in current will cause a change in luminance that is detectable by the human eye. Therefore, if the Micro LED panel adopts a traditional driving circuit, it is difficult to accurately control the driving current of the LED, and the display accuracy is low. [0003] During the implementation proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
CPCG09G3/32
Inventor 付舰航
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD