Pixel circuit, driving method thereof, and display panel
A pixel circuit and drive transistor technology, applied in static indicators, instruments, etc., can solve the problems of poor display effect and uneven display of display panel, so as to save cost, slow down the aging speed of devices, and improve the display effect
Active Publication Date: 2022-01-25
YUNGU GUAN TECH CO LTD
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[0004] However, existing display panels have the problems of uneven display and poor display effect
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[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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The embodiment of the present invention discloses a pixel circuit and its driving method, and a display panel. In the characteristic writing stage, the gate of the driving transistor is coupled to a preset voltage through the coupling module, and the data voltage is written into the data voltage through the data writing module. The first pole of the driving transistor, wherein the difference between the preset voltage and the data voltage is opposite to the voltage difference between the gate of the driving transistor and the first pole when the driving transistor is turned on; so that in the characteristic recovery stage, the threshold of the driving transistor The voltage drift is restored to a certain extent, and the threshold voltage drift is pulled back, thereby reducing the threshold voltage drift of the driving transistor. And the characteristic restoration stage is before the data writing stage, which can minimize the drift of the threshold voltage of the driving transistor after the characteristic restoring stage in each frame, thereby ensuring that the compensation module can drive the transistor within the limited time of the data writing stage. The threshold voltage is fully compensated to improve display uniformity.
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 ...
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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