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

Abstract

The embodiment of the invention discloses a display panel, a driving method and a display device. The display panel comprises a substrate base plate; a plurality of sub-pixels positioned on one side of the substrate base plate; the plurality of sub-pixels being arranged in an array; each sub-pixel comprising a pixel driving circuit and a light-emitting element; a pixel driving circuit, comprisingan initialization transistor and a driving transistor, and the initialization transistor and the driving transistor each comprising a first electrode, a second electrode and a grid electrode; a firstelectrode of the initialization transistor being electrically connected with a grid electrode of the driving transistor, and the driving transistor being used for providing driving current for the light-emitting element; and at least one switch module. The second electrodes of the initialization transistors of the at least two sub-pixels are connected with the output end of the same switch module.The input end of the switch module is electrically connected with the initialization signal end. The switch module is used for transmitting an initialization signal to the second electrode of the initialization transistor. The problem that the gate voltage of a driving transistor is unstable due to electric leakage of an initialization transistor can be solved, and the display effect is improved.

Description

technical field [0001] The embodiments of the present invention relate to the field of display technology, and in particular, to a pixel circuit and a driving method thereof, a display panel and a display device. Background technique [0002] At present, the Organic Light-Emitting Diode (OLED) display panel is widely favored by people due to its advantages of self-illumination, high contrast, thin thickness, fast response, and being applicable to flexible panels. [0003] The OLED element of the OLED display panel is a current-driven element, and a corresponding pixel circuit needs to be provided to provide a driving current for the OLED element so that the OLED element can emit light. The pixel driving circuit of the OLED display panel usually includes a driving transistor, which can generate a driving current to drive the OLED element according to the voltage of its gate, wherein, other transistors connected to the gate of the driving transistor include a double-gate trans...

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 improve the problem of unstable gate voltage of the driving transistor caused by the leakage of the double-gate transistor, and improve the display effect

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