A pixel circuit, its driving method, and a display device

Abstract

The embodiment of the invention provides a pixel circuit, a drive method of the pixel circuit and a display device, and relates to the technical field of display drive circuits. The pixel circuit comprises a first transistor, a second transistor and a third transistor, wherein the first electrode of the first transistor is connected with a data line, the grid electrode of the first transistor is connected with a first switch signal end, and the second electrode of the first transistor is connected with a light emitting device. The first electrode of the second transistor is grounded, the grid electrode of the second transistor is connected with a second switch signal end, and the second electrode of the second transistor is connected with the second electrode of the first transistor. The first electrode of the third transistor is connected with the data line, the grid electrode of the third transistor is connected with the second switch signal end, and the second electrode of the third transistor is grounded. By the adoption of the pixel circuit, crosstalk of RGB tricolor display data due to residual signals on the data line can be avoided.

Description

technical field [0001] The present invention relates to the technical field of display driving circuits, in particular to a pixel circuit, a driving method thereof, and a display device. Background technique [0002] Organic Light Emitting Diode (OLED), as a current-mode light-emitting device, is increasingly being used in high-performance devices because of its characteristics of self-luminescence, fast response, wide viewing angle and the ability to be fabricated on flexible substrates. displayed in the field. According to the driving method, OLED can be divided into two types: PMOLED (PassiveMatrixDrivingOLED, passive matrix driven organic light emitting diode) and AMOLED (ActiveMatrixDrivingOLED, active matrix driven organic light emitting diode). As the size of the traditional PMOLED increases, the driving time of a single pixel usually needs to be reduced, so the transient current needs to be increased, resulting in a significant increase in power consumption. In the...

AI Technical Summary

Problems solved by technology

Taking the output of red display data Data_R and green display data Data_G as an example, in the data output line part of the driver IC, due to the existence of parasitic resistance and capacitance, the red display data Data_R will have a residual voltage Data_R' on the data line, and this part remains When the green data Data_G is written, the voltage will be superimposed on it, causing the display data written in the green sub-pixel to be (Data_G+Data_R'), which will affect the gray scale of the display and cause wrong information to be displayed

The residual voltage on the data line will cause the mutual crosstalk of the R, G, and B primary color display data, which will seriously affect the gray scale of the display and affect the display effect

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