Pixel circuit for display device

Abstract

A pixel circuit includes: a driving transistor (DTFT), wherein a gate of the driving transistor (DTFT) is connected to a second terminal of a second capacitor (C2), a second terminal of a second transistor (M2), and a second terminal of a third transistor (M3), a first terminal of the driving transistor (DTFT) is connected to a first voltage, and a second terminal of the driving transistor (DTFT)is connected to a first terminal of the second transistor (M2) and a first terminal of a fourth transistor (M4), the second transistor (M2), a gate of which is connected to a compensation line (comp),the third transistor (M3), wherein a gate of the third transistor (M3) is connected to the (n-x) th scan line, x is an integer larger than 1, and a first terminal of the third transistor (M3) is connected to an initialization line (VINIT) and a second terminal of a seventh transistor (M7), the fourth transistor (M4), wherein a gate of the fourth transistor (M4) is connected to an emission line (EM), and a second terminal of the fourth transistor (M4) is connected to a first terminal of the seventh transistor (M7) and an anode of a light emitting diode (OLED), a fifth transistor (M5), whereina gate of the fifth transistor (M5) is connected to the n th scan line, a first terminal of the fifth transistor (M5) is connected to a data line, and a second terminal of the fifth transistor (M5) isconnected to a first terminal of a first capacitor (C1), a first terminal of the second capacitor (C2), and a second terminal of a sixth transistor (M6), the sixth transistor (M6), a gate of which isconnected to the compensation line (comp), the seventh transistor (M7), a gate of which is connected to the compensation line (comp), the first capacitor (C1), and the second capacitor (C2).

Description

technical field [0001] The present invention relates to a display device, in particular to a pixel circuit for the display device. Background technique [0002] In recent years, Organic Light Emitting Diode (OLED) displays have become very attractive due to their high contrast ratio, responsiveness, and vivid colors, and are also very suitable for the needs of flexible display devices. figure 1 It is a schematic diagram of an OLED display panel. The driving circuit of the OLED display panel is a low temperature polysilicon-thin film transistor (Low Temperature Poly Silicon-Thin Film Transistor, LTPS-TFT) backplane placed on a glass or polyimide (polyimide, PI) substrate, covered with Luminescent material. The LTPS-TFT backplane includes a scan driver, an emitter driver, a De-MUX circuit and a pixel circuit array. A display driver integrated circuit (display driver integrated circuit, DDIC) is located on a flexible printed circuit (flexible printed circuit, FPC), and contr...

AI Technical Summary

Problems solved by technology

[0023] The purpose of the pixel circuit provided by the present invention is to solve the problem that the compensation time of the existing pixel circuit cannot be extended (more than 1HS)

Images