Pixel circuit, display panel and pixel circuit driving method

Abstract

The invention discloses a pixel circuit, display panel and pixel circuit driving method. The pixel circuit includes a light emitting element for emitting light in response to a driving current; a driving transistor for supplying the driving current to the light emitting element; a data write-in module for writing a data signal into the gate of the driving transistor; a holding module electrically connected with the gate of the driving transistor for holding the voltage of the gate of the driving transistor in the light emitting phase; and a control module electrically connected with the gate of the driving transistor for controlling the driving transistor to operate in the completely cut-off region in the cut-off phase, wherein the cut-off phase is before the light emitting phase. The pixel circuit, display panel and pixel circuit driving method can reduce the characteristic drift degree of the driving transistor in the pixel circuit, reduce the display mura and mura, and improve the display effect.

Description

technical field [0001] The embodiments of the present invention relate to the field of display technology, and in particular, to a pixel circuit, a display panel, and a driving method for the pixel circuit. Background technique [0002] Compared with liquid crystal displays, organic light-emitting displays have the advantages of low energy consumption, low production cost, self-illumination, wide viewing angle, and fast response speed. Currently, they are widely used in display fields such as mobile phones, PDAs, and digital cameras. Each pixel of an organic light-emitting display includes an organic light-emitting diode and a pixel circuit that drives the organic light-emitting diode to emit light. [0003] A pixel circuit generally includes a driving transistor, several switching transistors and storage capacitors. Due to the process and device aging, the characteristics of the driving transistor in the pixel circuit corresponding to each pixel drift, such as threshold vo...

AI Technical Summary

Problems solved by technology

Due to the process and device aging, the characteristics of the driving transistor in the pixel circuit corresponding to each pixel drift, such as threshold voltage drift, and the driving transistor generally works in the sub-threshold region for a long time, which is also easy to cause the characteristics of the driving transistor to drift. After the characteristics of the driving transistor drift, the characteristic curve will be distorted, and it may not be completely overlapped after compensation, so the characteristics of different driving transistors have different degrees of deviation, and there will be problems such as display mura and afterimage, which will affect the overall image. display effect

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