Array substrate, driving method thereof, display panel and display device

Abstract

The invention discloses an array substrate, a driving method thereof, a display panel and a display device. By setting a control electrode on the side of the active layer of a thin film transistor away from the gate electrode, and by controlling the control electrode located between the control electrode and the active layer The thickness of the buffer layer makes the thickness of the buffer layer greater than the thickness of the gate insulating layer between the gate electrode and the active layer to adjust the distance between the control electrode and the active layer to be greater than the distance between the gate electrode and the active layer. distance, and at least when the gate electrode is loaded with an off voltage to make the thin film transistor in an off state, the first control voltage is applied to the control electrode to affect the Vg voltage of the thin film transistor at this moment, thereby affecting the threshold voltage Vth of the thin film transistor, so that the Id of the thin film transistor The ‑Vg curve shifts to ensure that the leakage current Id is relatively small when the thin film transistor is turned off, achieving the effect of stabilizing the circuit and reducing power consumption.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an array substrate, a driving method thereof, a display panel and a display device. Background technique [0002] At present, with the development of science and technology, low-temperature polysilicon has been used to make thin film transistors in display devices such as liquid crystal display panels, specifically, array substrates containing low-temperature polysilicon thin film transistors such as figure 1 As shown, it generally includes a light-shielding layer 001, a buffer layer 002, a polysilicon layer that is an active layer 003, a gate insulating layer 004, a gate electrode 005, an interlayer insulating layer 006, a source-drain electrode 007, and The planarization layer 008, the first transparent electrode 009, the passivation layer 010 and the second transparent electrode 011; wherein, the first transparent electrode 009 is used as a common electrode, and the second tr...

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide an array substrate, a driving method thereof, a display panel, and a display device, so as to solve the problem of large leakage current of thin film transistors in the prior art

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