Pixel circuit, drive method thereof, array substrate and display panel

Abstract

The invention discloses a pixel circuit, a drive method of the pixel circuit, an array substrate and a display panel. The pixel circuit comprises a first transistor, a second transistor, an organic light-emitting diode and a voltage stabilization unit. According to the pixel circuit, because the voltage stabilization unit is arranged between the second electrode of the first transistor and the grid electrode of the second transistor serving as a driving tube, even through second signals received by a second signal input end are unsteady because of capacitive coupling and electric leakage on the periphery of the pixel circuit or attenuation in one frame of display, steady voltage signals can be obtained after the signals pass through the voltage stabilization unit, the voltage signals are applied to the grid electrode of the second transistor, the second transistor can be stably controlled, and therefore the open second transistor can obtain steady drain electrode current, the current flowing through the organic light-emitting diode can be more stable, and the display effect of the display panel can be improved.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel circuit and a driving method thereof, an array substrate and a display panel. Background technique [0002] In the pixel circuit of the display panel, the active matrix organic light emitting diode (Active Matrix Organic Light Emitting Diode, referred to as AMOLED) can emit light, which is driven by the thin film transistor (Thin Film Transistor, referred to as TFT) as a driving tube in a saturated state. Driven by current, therefore, the control of the drive tube will affect the display effect of the organic light emitting diode. [0003] The driving method of the driving tube can be divided into analog driving and digital driving, in which the analog driving can be realized through the current signal, while the digital driving can be realized through the voltage signal. By applying a voltage signal with only two voltage states of high level and low level to th...

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Problems solved by technology

[0006] In view of this, the embodiment of the present invention provides a pixel circuit and its driving method, an array substrate and a display panel, so as to solve the problem that the data signal applied to the gate of the drive transistor in the prior art is not stable, resulting in Technical problems with current instability

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