Pixel circuit driving method and pixel circuit

Abstract

The invention discloses a pixel circuit driving method and a pixel circuit. The pixel circuit comprises a switching tube T1,a switching tube T2,a capacitor C1 and a capacitor C2, a grid electrode of the T1 is connected with a scanning signal. A source electrode is connected with a data signal line Vdata. The drain electrode of the T2 is connected with one end of the C1 and a grid electrode of theT2, the source electrode of the T2 is connected with the on-chip voltage OVDD, the source electrode and the drain electrode of the T2 are connected through the capacitor C2, the drain electrode of theT2 is further connected with the other end of the C1, the drain electrode of the T2 is connected with the positive electrode of the pixel, and the negative electrode of the pixel is connected with the on-chip voltage OVSS. The invention has the advantages that the number of TFTs is small, the occupied panel area is small, the high PPI design is facilitated, the image definition is improved, meanwhile, the influence caused by the Vth difference and the RC loading of the OVDD can be effectively eliminated and reduced through the circuit driving method, and the display uniformity of panels is enhanced.

Description

technical field [0001] The invention relates to a stable voltage compensation pixel circuit and a driving method. Background technique [0002] The OLED (Organic Light Emitting Diode, Organic Light Emitting Diode) display panel has the advantages of high brightness, wide viewing angle, fast response speed, low power consumption, etc., and has been widely used in the field of high-performance display. Among them, such as Picture 1-1 As shown, in an OLED display panel, each pixel is usually composed of two transistors and a capacitor, commonly known as a 2T1C circuit. Due to the problem of transistor threshold voltage drift and OLED device degradation, OVDD metal trace IR_Drop and other adverse factors will cause The display of the OLED display is not uniform, therefore, the OLED pixel driving circuit needs a corresponding compensation structure. At present, the compensation structure of the OLED pixel drive circuit is relatively complicated. When designing the layout of the...

AI Technical Summary

Problems solved by technology

Among them, such as Picture 1-1 As shown, in an OLED display panel, each pixel is usually composed of two transistors and a capacitor, commonly known as a 2T1C circuit. Due to the problem of transistor threshold voltage drift and OLED device degradation, OVDD metal trace IR_Drop and other adverse factors will cause The display of OLED display is uneven, therefore, the OLED pixel drive circuit needs a corresponding compensation structure

At present, the compensation structure of the OLED pixel drive circuit is relatively complicated. When designing the layout of the panel, the pixels occupy a large area, which is not conducive to the design of high PPI (Pixels Per Inch, pixel density) display panel.

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