Pixel circuit, driving method thereof and display panel

A pixel circuit and drive module technology, applied to static indicators, instruments, etc., can solve problems such as substandard ratio, poor display effect, and affecting applications

Inactive Publication Date: 2021-02-23
HEFEI VISIONOX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] OLED display panels usually include multiple pixel circuits. However, the contrast of existing pixel circuits does not meet the standard when emitting light, resulting in poor display effect and affecting further applications.

Method used

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

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Embodiment Construction

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0030] As mentioned in the background art, the existing pixel circuit has the problem of low contrast. After careful research, the applicant found that the reason for this technical problem is: in order to achieve a low frequency state while maintaining the image quality, the pixel circuit of the prior art will Set the transistor connected to the storage capacitor as an oxide thin film transistor, for example, set it as an IGZO (indium gallium zinc oxide, indium gallium zinc oxide) transistor, because the leakage c...

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Abstract

The invention discloses a pixel circuit, a driving method thereof and a display panel. The pixel circuit comprises a driving module, a threshold compensation module, a data writing module, a storage module, a light emitting module and a potential control module; the driving module is a thin film transistor of a first type; the threshold compensation module is used for capturing the threshold voltage of the driving module to a control end of the driving module in the threshold compensation stage, wherein the threshold compensation module is an oxide thin film transistor of a second type; the data writing module is used for writing a data signal into the first end of the driving module in a threshold compensation stage; the potential control module is connected in series between the first end of the threshold compensation module and the control end of the driving module, and is used for switching off before the threshold compensation module is switched off or when the threshold compensation module is switched off in the same frame; and the potential control module is a low-temperature polycrystalline silicon thin film transistor of a second type. According to the embodiment of the invention, the light-emitting contrast of the pixel circuit reaches the standard.

Description

technical field [0001] Embodiments of the present invention relate to display technologies, and in particular to a pixel circuit, a driving method thereof, and a display panel. Background technique [0002] With the development of display technologies, display panels, especially OLED (Organic Light-Emitting Diode, Organic Light-Emitting Diode) display panels are more and more widely used, and accordingly the requirements for display panels are getting higher and higher. [0003] OLED display panels generally include multiple pixel circuits. However, the contrast ratio of existing pixel circuits is not up to standard when emitting light, resulting in poor display effect and affecting further applications. Contents of the invention [0004] The invention provides a pixel circuit, a driving method thereof, and a display panel, so as to ensure that the contrast ratio of the pixel circuit's light emission reaches the standard. [0005] In the first aspect, an embodiment of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3208
CPCG09G3/3208
Inventor 胡祖权赵国华姚远韩珍珍
Owner HEFEI VISIONOX TECH CO LTD
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