Display device, array substrate, pixel circuit and driving method thereof

Abstract

The invention discloses a display device, an array substrate, a pixel circuit and a driving method thereof. The pixel circuit comprises a resetting unit, a driving control unit, a power supply unit, an energy storage unit, a driving unit and a light emitting unit, wherein the resetting unit is used for writing input voltage of a resetting end into a first control point and writing input voltage ofa reference power supply end into a second control point; the driving control unit is used for writing input voltage of a data end into the first control point; the power supply unit is used for providing voltage of a first power supply end to the second control point and enabling a third control point to communicate with a fourth control point; the energy storage unit is used for storing the voltage of the first control point and the voltage of the second control point; the driving unit is used for discharging under the control of the voltage of the first control point and the voltage of thesecond control point; and the light emitting unit is used for emitting light under the control of the voltage of the fourth control point. By the pixel circuit, the problem of short-term incidental images can be improved effectively, meanwhile, threshold value voltage compensation and IR drop compensation are realized, and the problem that the display brightness of a panel is uneven is solved effectively.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel circuit, a driving method for the pixel circuit, an array substrate and a display device. Background technique [0002] AMOLED (Active-matrix Organic Light Emitting Diode, active-matrix organic light-emitting diode or active-matrix organic light-emitting diode) display technology, its display brightness is proportional to the driving current of the OLED device, when the OLED device is lit, The pixel circuit provides corresponding driving current to the OLED device, thereby forming a path from the power supply voltage ELVDD to the cathode ELVSS of the OLED. Among them, after the power supply voltage ELVDD is input from the outside of the effective display area, it is transmitted to each pixel circuit through wires in the effective display area. During the transmission process, because the wire has a certain resistance, the power supply voltage ELVDD will generate ...

AI Technical Summary

Problems solved by technology

Therefore, the first object of the present invention is to propose a pixel circuit that can effectively improve the short-term afterimage problem caused by the hysteresis effect, and at the same time realize threshold voltage compensation and IR drop compensation, and effectively improve the uniformity of the pixel current. Solve the problem of uneven panel display brightness

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