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

Abstract

The invention provides a pixel circuit, a driving method of the pixel circuit and a display device with the pixel circuit. The pixel circuit comprises a first switch tube, a first capacitor, a second capacitor, a third capacitor, a second switch tube, a third switch tube, a fourth switch tube, a fifth switch tube and a sixth switch tube, wherein the source electrode of the first switch tube is connected with a data signal end; the gate electrode of the first switch tube is connected with a first control signal end; the first end of the first capacitor is connected with the drain electrode of the first switch tube; the first end of the second capacitor is connected with a second voltage signal end; the second end of the second capacitor is connected with that of the first capacitor; the first end of the third capacitor is connected with the first control signal end; the second end of the third capacitor is connected with the gate electrode of a driving tube; the source electrode of the second switch tube is connected with the gate electrode of the driving tube; the drain electrode of the second switch tube is connected with that of the driving tube; and the gate electrode of the second switch tube is connected with the first control signal end. The pixel circuit provided by the invention is used for compensating threshold voltage uniformity of the driving tube in the pixel circuit and solves the problem of poor luminance uniformity of an LED.

Description

technical field [0001] The present invention relates to the technical field of liquid crystal display, in particular to a pixel circuit, a driving method thereof, and a display device. Background technique [0002] Active Matrix / Organic Light Emitting Diode (AMOLED) display is a new type of display technology. Compared with Thin Film Transistor (TFT) Liquid Crystal Display (Liquid Crystal Display, LCD), AMOLED It has many advantages in terms of viewing angle range, image quality, performance and cost, and has great development potential in the field of display manufacturing. [0003] Active light-emitting diodes display because their luminous brightness is proportional to the size of the driving current provided to the OLED device, so in order to achieve the best display effect, a large driving current is required, and low temperature polysilicon (LTPS, Low Temperature Poly-silicon) Backplane technology is the best choice for AMOLED display backplane technology because it c...

AI Technical Summary

Problems solved by technology

[0005] Based on the above, the purpose of the technical solution of the present invention is to provide a pixel circuit and its driving method, and a display device, which are used to perform V th Uniformity compensation to solve the problem of poor uniformity of light-emitting diode brightness

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