TFT (thin film transistor) array substrate

Abstract

The invention provides a TFT (thin film transistor) array substrate. Through increase of the area of a drain (420) of each TFT (900) located in a shading area, the horizontal projection of the drain (420) is overlapped with the horizontal projection of part of a corresponding common electrode (600), and the drain (420) and the common electrode (600) constitute a first memory capacitor (Cst1), a corresponding pixel electrode (800) and the common electrode (600) constitute a second memory capacitor (Cst2), the pixel electrode (800) and the drain (420) are contacted to form electrical connection and are isopotential, the first memory capacitor (Cst1) and the second memory capacitor (Cst2) are connected in parallel to constitute a memory capacitor, and the capacity of the memory capacitor is equal to the capacity sum of the first memory capacitor (Cst1) and the second memory capacitor (Cst2). Under the premise that the aperture rate is not reduced, the capacity of the memory capacitor can be increased, the problems of crosstalk interference, image sticking and the like are solved, and the display quality of a product is improved.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a TFT array substrate. Background technique [0002] Liquid Crystal Display (LCD) has many advantages such as thin body, power saving, and no radiation, and has been widely used, such as: LCD TV, mobile phone, personal digital assistant (PDA), digital camera, computer screen or notebook computer Screens, etc., dominate the field of flat panel displays. [0003] Most of the liquid crystal displays currently on the market are backlight liquid crystal displays, which include a liquid crystal display panel and a backlight module. The working principle of the liquid crystal display panel is to pour liquid crystal molecules between the thin film transistor array substrate (ThinFilmTransistorArraySubstrate, TFTArraySubstrate) and the color filter substrate (ColorFilter, CF), and apply a driving voltage on the two substrates to control the rotation of the liquid crystal molecul...

AI Technical Summary

Problems solved by technology

like figure 1 and figure 2 The existing TFT array substrate shown is limited by the requirements of process capability, optical quality and transmittance, and it is difficult to change the area of ​​the patterned pixel electrode 80, and it is impossible to increase the area of ​​the pixel electrode 80 to achieve this effect. ways to increase the capacity of the storage capacitor

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