OLED pixel circuit as well as driving method and display device thereof

Abstract

The invention provides an OLED pixel circuit as well as a driving method and a display device thereof and relates to the technical field of display. The OLED pixel circuit can avoid that a sub-pixel in short circuit influences display of sub-pixels at the periphery of the sub-pixel in short circuit. The OLED pixel circuit comprises a driving module, a light-emitting module and a short circuit protection module; the driving module is respectively connected with a scanning signal input terminal, a data signal input terminal, a first voltage terminal and the light-emitting module and is used for driving the light-emitting module to emit light under the control of the scanning signal input terminal, the data signal input terminal and the first voltage terminal; the light-emitting module is also connected with a second voltage terminal and is used for emitting light under the control of the driving module and the second voltage terminal; and the short circuit protection module is connected with the driving module and the light-emitting module and is used for controlling the driving module to be closed when the light-emitting module is in short circuit.

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] With the rapid development of multimedia technology, OLED (Organic Light-Emitting Diode, organic light-emitting diode) has become a display due to its advantages such as self-illumination, high contrast, wide color gamut, simple preparation process, low power consumption, and easy realization of flexible display. An important light-emitting element in a device. [0003] Among them, especially the AM-OLED (Active Matrix / Organic Light Emitting Diode, Active Matrix Organic Light Emitting Diode) display panel has no viewing angle limitation, low manufacturing cost, high response speed, low power consumption, wide operating temperature range, light weight, It can be used for DC drive of portable machines and has become a research hotspot with the advantages of miniaturization and thi...

AI Technical Summary

Problems solved by technology

[0005] However, since the film layers between the anode and cathode of the OLED are relatively thin, and there are foreign objects in the film layer, or the process of digging holes and climbing slopes is not well controlled, the film layer will be further thinned, making the anode and cathode of the OLED A short circuit occurs due to a small resistance between them, so that the voltage of the V2 terminal connected to the cathode increases

The V2 terminal between each sub-pixel is conductive, so the voltage of the V2 terminal of the short-circuited sub-pixel increases, which easily causes the voltage of the V2 terminal of its surrounding sub-pixels to also increase, thereby affecting the OLED cathode and anode in the surrounding sub-pixels. The pressure difference between them will affect the display of surrounding sub-pixels

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