Driving transistor, array substrate and display panel

Abstract

The invention discloses a driving transistor, an array substrate and a display panel. The driving transistor includes an active layer and a gate layer, wherein projection of the active layer on the gate layer partially overlaps the gate layer, the overlapped active layer includes at least two segments. For the above transistor, the projection of the active layer on the gate layer partially overlaps the gate layer, the overlapped portion includes at least two segments, the gate layer does not completely cover the active layer, so one driving transistor includes at least two channels to form a double-gate or even multi-gate transistor, so that the electric field in the channel is reduced under the same source-drain voltage, the saturation of an output curve of the transistor is better, a saturation region is flatter, when the driving transistor is used to drive an OLED device, the TFT output curve warpage degree is reduced, and thereby the service life of the OLED device is improved.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a driving transistor, an array substrate and a display panel. Background technique [0002] The lifespan of OLED devices has always been a focus of concern in the industry and urgently needs to be improved. The voltage at the OLED operating point will gradually increase during use, and the operating current will also decrease accordingly. When the increase in the operating voltage of the OLED remains unchanged, the saturation region of the TFT (hereinafter referred to as DTFT) that drives the OLED pixel to emit light will warp. The degree will be significantly increased, so that the operating current of the OLED will drop to a greater degree, resulting in a reduction in the lifetime of the OLED device. Contents of the invention [0003] Based on this, the present invention provides a drive transistor, an array substrate and a display panel that reduce the degree of wa...

AI Technical Summary

Problems solved by technology

The voltage at the OLED operating point will gradually increase during use, and the operating current will decrease accordingly. When the increase in the operating voltage of the OLED remains unchanged, the saturation region of the TFT (hereinafter referred to as DTFT) that drives the OLED pixel to emit light will warp. The degree will increase significantly, so that the OLED operating current will drop to a greater extent, resulting in a reduction in the life of the OLED device

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