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Liquid crystal display device and a manufacturing method thereof

A technology of liquid crystal display device and liquid crystal layer, which is applied to static indicators, photoengraving process of pattern surface, optics, etc., and can solve problems such as adverse effects of signal transmission.

Inactive Publication Date: 2007-12-19
NEC LCD TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the pedestal pattern is a floating type electrode, the capacitance coupled between the pedestal pattern and the scanning signal line, and the short circuit between the pedestal pattern and other electrodes such as image signal lines will adversely affect signal transmission.

Method used

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  • Liquid crystal display device and a manufacturing method thereof
  • Liquid crystal display device and a manufacturing method thereof
  • Liquid crystal display device and a manufacturing method thereof

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Embodiment Construction

[0041] Exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings.

[0042] The active matrix liquid crystal display device of the present application includes a substrate in which switching elements such as TFTs are formed (hereinafter referred to as a TFT substrate), another substrate (hereinafter referred to as an opposing substrate), and liquid crystal interposed therebetween. The opposite substrate of the active matrix liquid crystal display device according to the color display method is a transparent insulating substrate made of glass or the like, on which colored layers of red, green and blue (RGB) colors, black for blocking unnecessary light from passing matrix. In order to maintain a gap between the TFT substrate and the opposite substrate, a plurality of columnar spacers of almost the same height are formed at predetermined positions on the black matrix, and the spacers protrude toward the TFT substra...

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Abstract

Disclosed is an active matrix liquid crystal display device, including a first substrate, a second substrate opposed to the first substrate and a liquid crystal layer sandwiched between the first and the second substrates. The first substrate includes: a scan signal line; a common signal line; an image signal line; a thin film transistor; a pixel electrode connected to the thin film transistor; a common electrode connected to the common signal line; an insulating film sandwiched between the lines and the electrodes; and a concave portion. The second substrate includes: the column-shaped spacers projecting to the first substrate and being almost equal in height to each other. A gap is formed between the first substrate and a tip of the column-shaped spacer at a position corresponding to the concave portion. The column-shaped spacer located at a different position reaches the first substrate.

Description

technical field [0001] The invention relates to a liquid crystal display device and its manufacturing method, in particular to an in-panel switching (IPS) active matrix liquid crystal display device and its manufacturing method. The active matrix liquid crystal has a wide aperture ratio and a clear contrast. Background technique [0002] In recent years, it has become popular to apply the IPS (In-Panel Switching) method to large-sized TV monitors. The IPS method enables the display of images by rotating liquid crystal molecular axes in a plane parallel to the substrate by applying a transverse electric field. Since the viewing angle according to the IPS method has no dependence on the rising angle of the molecular axis, the viewing angle characteristics of the IPS method are far superior to those of the TN (twisted nematic) method. However, the IPS method requires higher accuracy of in-plane uniformity of cell gaps than the TN method. [0003] The cell gap means the distan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1362G02F1/133G03F7/00
CPCG02F1/13394G02F2001/13606G02F1/134363G02F1/13606
Inventor 今野隆之
Owner NEC LCD TECH CORP
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