Lateral electric field liquid crystal display device
AssigneeNEC LCD Technologies, Ltd.
InventorsTakuya Asai, Syouichi Kuroha, Takeshi Sasaki
Life of this patent
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Abstract
In a lateral electric field liquid crystal display device, a major electrode portion for generating a lateral electric field is formed using a layer different from a layer on which other electrodes and lines are formed. In this case, the major portion is formed to have a thickness of {fraction (1/20)} to ⅓ of the thickness of each of the other electrodes and lines. Thus, flatness of a base film of an alignment layer is significantly improved, also alignment layer material can be coated and formed with high flatness on the base film, and rubbing of the alignment layer material can be performed uniformly for the overall substrate surface.
Claims19
A lateral electric field liquid crystal display device comprising:
- a thin-film transistor (TFT) substrate comprising a signal line, a common line, a pixel electrode and a common electrode, said pixel electrode being partially formed in a layer which is different from and above said signal line and said common line, said common electrode being formed in said layer, and said common electrode and a portion of said pixel electrode formed in said layer having thicknesses which are less than thicknesses of said signal line and said common line;
- an opposing substrate;
- and
- a liquid crystal layer formed between said TFT substrate and said opposing substrate.
A liquid crystal display device, comprising:
- a thin-film transistor (TFT) substrate comprising:
- a first layer comprising:
- a signal line;
- and
- a common line;
- and
- a second layer formed above said first layer, comprising:
- a portion of a pixel electrode;
- and
- a common electrode, said common electrode and said portion of said pixel electrode formed in said second layer having thicknesses which are less than thicknesses of said signal line and said common line;
- an opposing substrate;
- and
- a liquid crystal layer formed between said TFT substrate and said opposing substrate.
A method of preparing a transparent substrate for a liquid crystal display device, comprising:
- forming a common line on said transparent substrate;
- forming a signal line and a first pixel electrode on said transparent substrate;
- forming a first interlayer insulation layer on said transparent substrate and over said signal line and said first pixel electrode;
- and
- forming a common electrode and a second pixel electrode on said first interlayer insulating layer,
- wherein said common electrode and said second pixel electrode have thicknesses which are less than thicknesses of said signal line and said common line.
Dependencies are inferred from the claim text.