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

Abstract

The invention provides a pixel circuit and a driving method thereof, an OLED display panel and a display device. The pixel circuit comprises first to sixth transistors, a capacitor and an organic light emitting device, wherein the first transistor is used for providing a signal of a first voltage signal end to a first electrode of the second transistor, the third transistor is used for making a second electrode of the second transistor and an anode of the organic light emitting device realize conduction, the fourth transistor and the sixth transistor are used for storing a data signal of a data signal end and the threshold voltage of the second transistor to the capacitor to compensate the threshold voltage of the second transistor, and the second transistor is used for generating the driving current according to the data signal to drive the organic light emitting device to emit light. Through mutual cooperation of the transistors and the capacitor, the threshold voltage of the secondtransistor is compensated, the display effect of the whole frame is improved, the quantity of the utilized transistors is further reduced, and high-resolution display is facilitated.

Description

technical field [0001] The invention relates to the technical field of plane display, in particular to a pixel circuit and a driving method thereof, an OLED display panel and a display device. Background technique [0002] Active Matrix Organic Light Emitting Diode (AMOLED) display is a display technology used in TVs and mobile devices. It is sensitive to power consumption due to its low power consumption, low cost, and large size. It has broad application prospects in portable electronic devices. [0003] The organic light-emitting diode in AMOLED can emit light is driven by the driving current generated by the thin film transistor (Thin Film Transistor, referred to as TFT). There are non-uniform phenomena, such as threshold voltage, mobility, etc., resulting in uneven display of the entire image. [0004] Traditional active matrix organic light-emitting diodes adopt a 2T1C pixel driving method, using a switching thin film transistor, a driving thin film transistor and a ...

AI Technical Summary

Problems solved by technology

With the increase of PPI, the pixel pitch becomes smaller and smaller, and the layout space for the 7T1C architecture becomes more and more difficult

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