A pixel circuit and display device

Abstract

The present invention provides a pixel circuit and a display device. The data writing module writes the data voltage into the source of the auxiliary driving transistor, and pulls down the potential of the gate of the auxiliary driving transistor to the threshold voltage of the auxiliary driving transistor and the The sum of the data voltages, and since the gate of the driving transistor is connected to the gate of the auxiliary driving transistor, the threshold voltage of the driving transistor can be compensated by the threshold voltage of the auxiliary driving transistor, and since the threshold voltage of the auxiliary driving transistor and the driving transistor Similarly, the purpose of compensating the threshold voltage of the driving transistor is further achieved, so as to eliminate the influence of the threshold voltage on the driving transistor, thereby eliminating the phenomenon of uneven light emission of the display device.

Description

technical field [0001] The present invention relates to the field of display technology, and more specifically, to a pixel circuit and a display device. Background technique [0002] With the continuous development of multimedia, Organic Light Emitting Diode (OLED) display devices have attracted attention in the display market due to their simple structure and excellent operating temperature, contrast, viewing angle and other advantages. Organic luminescent displays include passive matrix OLED display devices and active matrix OLED display devices, and active matrix OLED display devices are widely used due to low power consumption. [0003] An organic luminescent display device includes multiple pixel circuits. In the structure of the pixel circuits, the threshold voltages of the driving transistors of different pixel circuits are different due to the limitations of the process and equipment tolerances, and different light emitting devices receive the same data voltage signa...

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Problems solved by technology

[0003] An organic luminescent display device includes multiple pixel circuits. In the structure of the pixel circuits, the threshold voltages of the driving transistors of different pixel circuits are different due to the limitations of the process and equipment tolerances, and different light emitting devices receive the same data voltage signal. , the currents driving its light emission are different, which leads to the phenomenon of uneven light emission in existing organic light-emitting display devices

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