A pixel circuit, its driving method and display panel

Abstract

The invention discloses a pixel circuit, a driving method thereof and a display panel. The pixel circuit comprises: a first transistor, a second transistor, a third transistor, a fourth transistor, a driving transistor, a first capacitor and an organic light-emitting element; The control terminal of the transistor is electrically connected to the scanning signal input terminal of the pixel circuit; the first pole of the first capacitor is electrically connected to the control signal input terminal of the pixel circuit, and the second pole of the first capacitor is electrically connected to the control terminal of the driving transistor; The control end of the second transistor is electrically connected to the scanning signal input end; the control end of the third transistor is electrically connected to the light emission control signal input end of the pixel circuit; the first end of the fourth transistor is electrically connected to the second end of the driving transistor, and the fourth The second end of the transistor is electrically connected to the anode of the light-emitting element. The pixel circuit can reduce the number of transistors and signal lines, thereby reducing the area of ​​the pixel circuit, which is beneficial to wiring and improves pixel density.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of organic light-emitting display, and in particular, to a pixel circuit, a driving method thereof, and a display panel. Background technique [0002] Compared with the traditional liquid crystal display panel, the organic light-emitting display panel has the characteristics of fast response, high contrast, wide viewing angle, etc., and thus has been more and more widely used. [0003] The organic light-emitting display panel includes a pixel driving circuit, which is used to drive the organic light-emitting device to emit light. The display driving circuit is usually composed of a plurality of thin film transistors (Thin Film Transistor, TFT) and capacitors; as the device ages, the threshold voltage of the driving transistor will change. Drift occurs, affecting display uniformity. In order to compensate the threshold voltage of the driving transistor, the existing pixel driving circui...

AI Technical Summary

Problems solved by technology

[0004] At present, the display panel is developing in the direction of high pixel density (Pixels Per Inch, PPI), and the pixel size is getting smaller and smaller. Since the existing pixel driving circuit includes a large number of thin film transistors and various signal lines, it is not conducive to the small size Layout and routing within pixels

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