TFT array substrate and manufacturing method thereof

Abstract

The invention provides a TFT array substrate and a manufacturing method thereof. The TFT array substrate is provided with a transparent conducting thin film electrode plate (503), a second metal electrode plate (202) and a common electrode wire (102), wherein the transparent conducting thin film electrode plate (503), a primary area pixel electrode (501) and a secondary area pixel electrode (502) are positioned on the same layer; the second metal electrode plate (202) is positioned on a second metal layer (M20); the common electrode wire (102) is positioned on a first metal layer (M10); a part of the common electrode wire (102), a part of the second metal electrode plate (202) and a part of the transparent conducting thin film electrode plate (503) are overlapped spatially, and the transparent conducting thin film electrode plate (503) is in contact with a part of the common electrode wire (102) through a second via hole (422) penetrating through an insulation protective layer (40) and a gate insulation layer (20); and a part of the common electrode wire (102), a part of the second metal electrode plate (202) and a part of the transparent conducting thin film electrode plate (503) form a charge sharing capacitor (C10) together, so that the capacity of the charge sharing capacitor can be improved, the aperture opening ratio is increased, and the display quality of a liquid crystal display panel is improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a TFT array substrate and a manufacturing method thereof. Background technique [0002] Active thin film transistor liquid crystal display (ThinFilmTransistor-LCD, TFT-LCD) has been developed rapidly and widely used in recent years. Most of the liquid crystal displays currently on the market are backlight liquid crystal display devices, which include a liquid crystal display panel and a backlight module. Usually, the liquid crystal display panel is composed of a color filter substrate (ColorFilter, CF), a thin film transistor array substrate (ThinFilmTransistorArraySubstrate, TFTArraySubstrate), a liquid crystal (LiquidCrystal, LC) sandwiched between the color filter substrate and the TFT array substrate, and a sealant (Sealant). , its working principle is to control the rotation of the liquid crystal molecules in the liquid crystal layer by applying a driving voltage on the tw...

AI Technical Summary

Problems solved by technology

Compared with the above two existing designs of the charge sharing capacitor C, under the premise that the capacity of the charge sharing capacitor C is equal, the second design has a relatively small aperture ratio due to the small distance between the common electrode line M1 and the metal electrode M2. Larger, but even with the second design, the aperture ratio of the TFT array substrate is still insufficient

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