A pixel circuit and its driving method

Abstract

The invention describes a pixel circuit and a drive method thereof. The pixel circuit comprises initialization modules, a data write-in module, a storage module, a threshold compensation module, a drive module, a light-emitting module and at least two initialization signal lines; and, in the at least two initialization signal lines, the first initialization signal line is connected with the corresponding initialization module and used to input a signal on the first initialization signal line to the storage module, and the second initialization signal line is connected with the corresponding initialization module and used to input a signal on the second initialization signal line to the drive module and the light-emitting module. A drive tube threshold voltage can be compensated, and display problems such as a display abnormity caused by a threshold drift and crosstalk generated by wiring parasitic capacitance are prevented.

Description

technical field [0001] The invention relates to the display field, in particular to a pixel circuit and a driving method thereof. Background technique [0002] In recent years, various light-weight and small-sized flat panel display devices have been developed instead of cathode ray tubes. Examples of these flat panel display devices include liquid crystal display panels, plasma display panels, and electroluminescent display panels. Among them, the electroluminescent display panel realizes the normal display of the display panel through the electroluminescent device in the display panel. According to the different materials of the light-emitting layer, the electroluminescent device is divided into two types: inorganic light-emitting and organic light-emitting. Response speed, high luminous efficiency, strong brightness, and wide viewing angle are called the new generation display technology in the industry. [0003] Organic light emitting devices include organic light emit...

AI Technical Summary

Problems solved by technology

As shown in formula (1), the driving current of the organic light-emitting diode is related to the threshold voltage V of the driving transistor th They are closely related, and there are large differences between the driving transistors of different pixel units due to factors such as working conditions and manufacturing processes, so there will be unevenness in the picture due to the drift of the threshold voltage of the driving transistors between different pixels on the display panel.

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