Pixel circuit, display panel and display device

Abstract

The embodiment of the invention provides a pixel circuit, a display panel and a display device, which relate to the technical field of display, and are used for improving the bright spot problem of a display picture of the display panel on the premise of improving the residual image problem of the display picture of the display panel. The pixel circuit includes a light emitting device, a driving transistor, a first transistor, and a second transistor. The second electrode of the driving transistor is coupled to the light emitting device, and the driving transistor is configured to control the magnitude of current flowing through the first electrode and the second electrode in response to the voltage of the control electrode. The first electrode of the first transistor is coupled with the control electrode of the driving transistor, and the second electrode is configured to write a first initialization signal. A first electrode of the second transistor is coupled to the light emitting device, and a second electrode is configured to write a second initialization signal. The first transistor comprises at least two sub-transistors which are connected in series, and the width-to-length ratio of a channel of at least one sub-transistor is smaller than that of a channel of the second transistor.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel circuit, a display panel and a display device. Background technique [0002] At present, organic light-emitting diode (Organic Light-Emitting Diode Display, OLED for short) display devices have been more and more widely used due to their advantages of self-luminescence, fast response speed, and low power consumption. [0003] In an OLED display device, the OLED can be driven to emit light through a pixel driving circuit. The pixel driving circuit may include a plurality of thin film transistors (Thin Film Transistor, TFT for short). Restricted by the nature of the thin film transistor itself, when the thin film transistor is in the off state, there will be leakage current in the thin film transistor, which will cause bright spots and afterimages on the display screen of the display device, and deteriorate the look and feel of the display screen. Contents of th...

AI Technical Summary

Problems solved by technology

Due to the nature of the thin film transistor itself, when the thin film transistor is in the off state, there will be leakage current in the thin film transistor, which will lead to bright spots and afterimages on the display screen of the display device, which will deteriorate the look and feel of the display screen

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