FFS (Fringe Field Switching) type TFT-LCD (Thin Film Transistor-Liquid Crystal Display) array substrate and manufacturing method thereof

Abstract

The invention discloses an FFS (Fringe Field Switching) type TFT-LCD (Thin Film Transistor-Liquid Crystal Display) array substrate and a manufacturing method thereof, comprising a grid line and a data line. A pixel electrode, a common electrode and a thin film transistor are formed in a pixel area limited by the grid line and the data line, wherein the pixel electrode and / or the common electrode are / is provided with a plurality of ladder-shaped strip-shaped grooves which enable a plurality of horizontal electric field in multiple directions to be formed between the pixel electrode and the common electrode, and each strip-shaped groove at least comprises two zigzag structures. In the FFS type TFT-LCD array substrate and the manufacturing method thereof, by setting the pixel electrode into figures comprising a plurality of ladder-shaped broken lines, a polydomain liquid crystal working mode can be provided, the visual angle is enlarged, and the color drifting can be eliminated.

Description

technical field [0001] The invention relates to liquid crystal display technology, in particular to a fringe field effect (Fringe Field Switching, FFS for short) type thin film transistor liquid crystal display (TFT-LCD) array substrate and a manufacturing method thereof. Background technique [0002] The FFS mode is a liquid crystal driving mode that can widen the viewing angle. The pixel electrodes in the FFS TFT-LCD array substrate are striped. When power is applied, a horizontal electric field parallel to the substrate is formed between the pixel electrodes and the common electrode. Such as Figure 19 Shown is a structural plan view of an FFS-type TFT-LCD array substrate in the prior art. Gate lines 22 and data lines 21 are formed on the array substrate. Adjacent gate lines 22 and data lines 21 define pixel areas, and each pixel The area is formed with a thin film transistor (TFT), strip-shaped pixel electrodes 24 and common electrodes 25. When no power is applied, there...

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Problems solved by technology

[0005] Theoretically, the increase in the number of domains is beneficial to expand the viewing angle and eliminate color drift, but Figure 21 The FFS-type array substrate shown cannot ideally eliminate color shift and further expand the viewing angle

Generally, for a normally black LCD, there is a small voltage difference between the pixel electrode and the common electrode when no power is applied. Figure 21 In the array substrate shown, since the pattern of the pixel electrode is a "herringbone" shape, the direction of the electric field formed between the pixel electrode and the common electrode is relatively consistent when the power is not applied, so the liquid crystal molecules will be more obviously deflected, resulting in light leakage. Generated, that is, when there is no electricity, the liquid crystal molecules are slightly deflected to cause light to pass through

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