Pixel circuit, display panel and driving method for pixel circuit

Abstract

The embodiment of the invention discloses a pixel circuit, a display panel and a driving method for the pixel circuit. Wherein, the pixel circuit includes: a light emitting element, for emitting light in response to a driving current; a driving transistor, for providing a driving current to the light emitting element; a data writing module, for writing a data signal into the gate of the driving transistor a holding module, electrically connected to the gate of the drive transistor, used to maintain the voltage of the gate of the drive transistor during the light-emitting phase; a control module, electrically connected to the gate of the drive transistor, used to maintain the voltage of the gate of the drive transistor during the cut-off phase The driving transistor is controlled to work in a completely cut-off region, wherein the cut-off phase is located before the light-emitting phase. The technical solution provided by the embodiments of the present invention can reduce the degree of characteristic drift of the driving transistor in the pixel circuit, reduce display mura and afterimage, 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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