Display device, display panel, array substrate and manufacturing method thereof

Abstract

The disclosure relates to a method for manufacturing an array substrate, the array substrate, a display panel and a display device. The manufacturing method includes: providing a substrate, the substrate includes a first region and a second region; forming a light-shielding layer on the first region; forming a buffer layer covering the light-shielding layer and the substrate; The first active layer and the second active layer, the first active layer corresponds to the first region, and the second active layer corresponds to the second region; the first gate insulation is formed on the surface of the first active layer away from the substrate layer and the first gate stacked on the first gate insulating layer, and a second gate insulating layer and a second gate stacked on the second gate insulating layer are formed on the surface of the second active layer away from the substrate; the first gate The orthographic projection of the pole is located in the first gate insulating layer, and the orthographic projection of the second gate is located in the second gate insulating layer; the distance between the edge of the first gate and the edge of the first gate insulating layer is greater than the edge of the second gate The spacing from the edge of the second gate insulating layer.

Description

technical field [0001] The present disclosure relates to the field of display technology, and in particular, to a method for manufacturing an array substrate, an array substrate, a display panel, and a display device. Background technique [0002] Currently, display panels are more and more widely used, especially OLED (Organic Light Emitting Diode) display panels have been widely used in various display devices. In existing display panels, thin film transistors are essential electronic devices. Since the top gate TFT has better performance than the bottom gate TFT, including the advantages of smaller parasitic capacitance, larger on-state current and higher stability, so Has been widely used. [0003] Usually, in the array substrate, in order to improve the stability of the driving tube, some thin-film transistors are provided with a light-shielding layer under them to shield light; and in order to increase the aperture ratio, there is usually no light-shielding layer und...

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Problems solved by technology

[0003] Usually, in the array substrate, in order to improve the stability of the driving tube, some thin-film transistors are provided with a light-shielding layer under them to shield light; and in order to increase the aperture ratio, there is usually no light-shielding layer under some thin-film transistors. During the process, it will affect the shaded thin film transistor, causing the threshold voltage of the shaded thin film transistor to be lower than that of the unshielded thin film transistor, thereby affecting the uniformity of the threshold voltage of the thin film transistor on the array substrate, thereby reducing the array substrate performance, eventually resulting in reduced display quality of the display panel

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