Pixel compensation circuit used for active organic light-emitting diode display

Abstract

The invention provides a pixel compensation circuit used for an active organic light-emitting diode display. The pixel compensation circuit comprises a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch and an organic light-emitting diode, wherein the control end of the first switch receives drive signals of the (N-1)-level grid electrode; the control end of the second switch receives an ignition control signal; the control end of the third switch receives drive signals of the N-level grid electrode; the control end of the fourth switch is electrically coupled to the first end of the first switch; the second end of the fifth switch is electrically coupled to the second end of the third switch; the control end of the sixth switch receives ignition control signals; the control end of the seventh switch receives drive signals of the N-level grid electrode; the anode of the organic light-emitting diode is coupled to the second end of the sixth switch, and the cathode of the organic light-emitting diode is coupled to a second voltage. Compared with the prior art, the fourth switch and the fifth switch form a bigrid framework, and the second end of the fifth switch is electrically coupled to the second end of the third switch, so that the situation of electricity leakage between a source electrode and the drain electrode of the third switch can be prevented, and a poor dimly bright point generated in a low gray-scale image is improved.

Description

technical field [0001] The invention relates to an active organic light emitting diode (ActiveMatrixOrganicLightEmittingDiode, AMOLED) display, in particular to a pixel compensation circuit of the AMOLED display. Background technique [0002] In recent years, conventional displays have been gradually replaced by portable thin flat panel displays. Self-illuminating displays such as organic or inorganic light emitting displays have more advantages than other flat panel displays because organic or inorganic light emitting displays can provide a wide viewing angle, good contrast ratio, and have a fast response speed. In this way, organic or inorganic light-emitting displays have attracted widespread attention as next-generation displays, especially organic light-emitting diode (Organic Light Emitting Diode, OLED) displays that include a light-emitting layer formed by organic materials, while providing color images, compared with inorganic light-emitting displays. It has higher ...

AI Technical Summary

Problems solved by technology

[0004] However, when the AMOLED panel is going to be developed to high resolution, the insufficient layout area will become a problem due to the smaller and smaller pixel size.

At the same time, in the compensation circuit of some models, thin-film transistors are often prone to leakage between the source and drain due to process variations or defects, resulting in poor quality of low-gray-scale images

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