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

A technology for pixel circuits and driving transistors, applied in the field of driving, can solve the problems of affecting display effect, uneven display, affecting the luminous brightness of light-emitting elements, etc., and achieve the effects of improving resolution, small size, and improving display effect.

Active Publication Date: 2020-05-08
WUHAN TIANMA MICRO ELECTRONICS CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a pixel circuit and its driving method, a display panel, and a display device, so as to solve the problem in the prior art that the gate voltage of the driving transistor changes due to the influence of the leakage current, which affects the light-emitting brightness of the light-emitting element and causes Uneven display, technical problems that affect the display effect

Method used

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

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Embodiment Construction

[0036] 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.

[0037] As mentioned in the background art, due to reasons such as manufacturing process and device aging, the threshold voltage of the driving transistor in the pixel driving circuit drifts, resulting in uneven display. However, the pixel circuit with threshold compensation function in the prior art has a complex structure and a large size, which is not conducive to the high PPI of the display panel; at the same time, it cannot meet the requirements of light transmission and display in the high light transmission a...

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Abstract

The embodiment of the invention discloses a pixel circuit and a driving method thereof, a display panel and a display device. The pixel circuit comprises a driving transistor, a storage capacitor, a data writing module, a threshold compensation module and an organic light-emitting element, wherein the data writing module is electrically connected with a grid electrode of the driving transistor anda first pole plate of the storage capacitor and is used for writing a data signal into the grid electrode of the driving transistor and the first pole plate of the storage capacitor in a data writingstage; the threshold compensation module is electrically connected with a second pole plate of the storage capacitor and is used for adjusting the potential of the second pole plate of the storage capacitor to be a first potential in a data writing stage, adjusting the potential of the second pole plate of the storage capacitor to be a second potential in a threshold compensation stage so as to adjust the potential of the first pole plate of the storage capacitor to be a third potential, and compensating the threshold voltage of the driving transistor; the driving transistor is electrically connected with the organic light-emitting element and used for providing driving current for the organic light-emitting element in the light-emitting stage and driving the organic light-emitting element to emit light.

Description

technical field [0001] The present invention relates to the field of driving technology, in particular to a pixel circuit and a driving method thereof, a display panel and a display device. Background technique [0002] Organic Light Emitting Diode (OLED) displays have the advantages of self-illumination, low driving voltage, high luminous efficiency, short response time, flexible display, etc., and become the display with the most development potential at present. [0003] The OLED element of the OLED display is a current-driven element, and a corresponding pixel driving circuit needs to be provided to provide a driving current for the OLED element so that the OLED element can emit light. A pixel driving circuit of an OLED display generally includes a driving transistor, a switching transistor and a storage capacitor. The driving transistor can generate a driving current for driving the OLED element according to the voltage of its gate. However, due to reasons such as tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3233
CPCG09G3/3233G09G2310/061G09G2320/045G09G2320/0233G09G2300/0426G09G2300/0465G09G2340/0407G09G2300/0819G09G3/3258G09G2310/06
Inventor 周茂清陈菲向东旭
Owner WUHAN TIANMA MICRO ELECTRONICS CO LTD
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