Pixel circuit and driving method, display panel and display device of pixel circuit

Abstract

The invention discloses a pixel circuit and a driving method, a display panel and a display device of the pixel circuit, wherein the driving method, the display panel and the display device are used for prolonging the service life of the pixel circuit. The pixel circuit comprises a charging sub circuit, a capacitor, a first driving sub circuit and a second sub driving circuit; the first end of the capacitor is connected with the first ends of the first driving sub circuit and the second driving sub circuit, and the second end of the capacitor is connected with the charging sub circuit; the second end of the first driving sub circuit is connected with a first light emitting device, and the second end of the second driving sub circuit is connected with a second light emitting device, wherein the direction of the driving current flowing from the first driving sub circuit to the first light emitting device is opposite to that flowing from the second driving sub circuit to the second light emitting device; the charging sub circuit is used for charging the capacitor; the capacitor discharges to enable the first driving sub circuit to drive the first light emitting device to light or the second driving sub circuit to drive the second light emitting device to light.

Description

technical field [0001] The present invention relates to the technical field of organic light-emitting display, in particular to a pixel circuit and its driving method, a display panel and a display device. Background technique [0002] Organic light-emitting display devices have attracted much attention due to their advantages of low power consumption, high brightness, low cost, wide viewing angle, and fast response speed, and have been widely used in the field of organic light-emitting technology. [0003] An organic light emitting diode (Organic Light Emitting Diode, OLED) is a light-emitting device widely used in the field of organic light-emitting at present. At present, OLEDs can be divided into two categories: passive drive and active drive according to their driving methods, namely direct addressing and thin film transistor (Thin Film Transistor, TFT) matrix addressing. Among them, the actively driven OLED is also called active matrix OLED (AMOLED), and the light-emi...

AI Technical Summary

Problems solved by technology

[0006] The pixel circuit provided by the prior art only includes a driving transistor and a light-emitting device connected to the driving transistor. In the stage of displaying a frame of images, the driving transistor in the pixel circuit drives the light-emitting device to emit light; AMOLED display driving OLED to emit light belongs to DC drive. , the electric field corresponding to the long-term DC driving voltage causes polarized ions inside the OLED, which makes the OLED form a built-in electric field, thereby increasing the threshold voltage of the OLED, greatly reducing the luminous efficiency of the OLED, and shortening the life of the OLED.

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