OLED (Organic Light Emitting Diode) pixel circuit, driving method thereof and display device

Abstract

The invention provides an OLED (Organic Light Emitting Diode) pixel circuit, a driving method thereof and a display device and belongs to the display technological field. With the OLED (Organic LightEmitting Diode) pixel circuit, the driving method thereof and the display device adopted, the problem of afterimages appearing on an OLED display caused by the increase of the formation time and cut-off time of the channel of a driving transistor. The OLED pixel circuit of the invention includes a data write-in and compensation module, a first driving module, a second driving module, a light emitting control module, and a light emitting module; the data write-in and compensation module is connected with the first driving module, a first signal end, and a data signal end and is used for compensating the threshold voltage of the first driving module; the first driving module is connected with the light emitting control module and a first voltage end and is used used for driving the light emitting module after the compensation of the threshold voltage is realized; the second driving module is connected with the first driving module, the light emitting control module and the first voltageend and is used for driving the light emitting module; the light emitting control module is further connected with the light emitting module and a second signal end and is used for making the first driving module and the second driving module connected with the light emitting module; and the light emitting module is used for emitting light under the common driving of the first driving module and the second driving module.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an OLED pixel circuit, a driving method thereof, and a display device. Background technique [0002] Organic Light Emitting Diode (OLED) display is one of the hotspots in the current research field. Compared with Liquid Crystal Display (LCD), OLED display has low energy consumption, low production cost, self-illumination, wide Angle of view and the advantages of fast response speed. Among them, pixel circuit design is the core technical content of OLED display, which has important research significance. [0003] Although the OLED display has many advantages mentioned above, after the driving transistor in the OLED pixel circuit works for a long time, the formation and cut-off time of the driving transistor channel will increase, that is, the switching of the driving transistor will be hysteresis. In this case, an afterimage will appear on the OLED display, which will degrade t...

AI Technical Summary

Problems solved by technology

[0003] Although the OLED display has many advantages mentioned above, after the driving transistor in the OLED pixel circuit works for a long time, the formation and cut-off time of the driving transistor channel will increase, that is, the switching of the driving transistor will be hysteresis. In the process, afterimages will appear on the OLED display, which will make the display screen look and feel worse

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