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Pixel circuit, driving method thereof and display panel

A technology of pixel circuits and driving transistors, applied in static indicators, instruments, etc., can solve the problems of uneven display and poor display effect of display panels, and achieve the effect of slowing down the aging speed of devices, saving costs, and improving display effects.

Active Publication Date: 2020-09-25
YUNGU GUAN TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] However, existing display panels have the problems of uneven display and poor display effect

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

[0048]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.

[0049] As mentioned in the background art, existing pixel panels have problems of uneven display and poor display effect. The inventors found that the reason for the above problems is that the existing display panel usually includes an array substrate, the array substrate includes a pixel circuit, and the transistors in the pixel circuit are usually made based on the LTPS process, and the stability of the transistor based on the LTPS process poor. For example, when the driving transistor in the pixel circuit is a ...

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Abstract

The embodiment of the invention discloses a pixel circuit, a driving method thereof and a display panel. The method comprises the steps: in a characteristic writing phase, coupling the grid electrodeof a driving transistor to a preset voltage through a coupling module, and writing a data voltage into the first electrode of the driving transistor through a data writing module, wherein the difference value between the preset voltage and the data voltage is positive and negative opposite to the voltage difference value between the grid electrode of the driving transistor and the first electrodewhen the driving transistor is conducted; therefore, in the characteristic recovery stage, recovering the threshold voltage drift degree of the driving transistor to a certain extent, pulling back thethreshold voltage drift amount, and then reducing the threshold voltage drift of the driving transistor. Moreover, the characteristic recovery stage is before the data writing stage, so the drift degree of the threshold voltage of the driving transistor is minimum after the characteristic recovery stage in each frame, the threshold voltage of the driving transistor can be fully compensated by thecompensation module within the limited time of the data writing stage, and the display uniformity is improved.

Description

technical field [0001] Embodiments of the present invention relate to the field of display technology, and in particular, to a pixel circuit, a driving method thereof, and a display panel. Background technique [0002] With the development of display technology, people have higher and higher requirements for display effects. [0003] Existing display panels usually include a plurality of pixel circuits, and the pixel circuits usually include a driving transistor and a light emitting device, and the driving transistor generates a driving current to control the luminance of the light emitting device. [0004] However, the existing display panel has the problems of uneven display and poor display effect. Contents of the invention [0005] The invention provides a pixel circuit, a driving method thereof, and a display panel, so as to reduce the drift of the threshold voltage of the driving transistor, slow down the aging speed of the device of the driving transistor, improve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3225
CPCG09G3/3225G09G2310/0286
Inventor 王玲盖翠丽米磊卓然然张兵丁立薇
Owner YUNGU GUAN TECH CO LTD
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