Liquid crystal display device

Patent metadata

Field	Value
Publication number	US-9395586-B2
Application number	US-201113242321-A
Country	US
Kind code	B2
Filing date	Sep 23, 2011
Priority date	Oct 20, 2010
Publication date	Jul 19, 2016
Grant date	Jul 19, 2016

Abstract

In one embodiment, a liquid crystal display device includes a first substrate and a second substrate. In the first substrate, gate lines extend in a first direction, and a first source line and a second source line extend in a second direction orthogonally crossing the first direction. A pixel electrode having a first belt-like main electrode is arranged approximately in a central portion between the first source line and the second source line and extending in the second direction. A first belt-like sub-electrode covers the gate line between the first source line and the second source line and extending in the first direction. The second substrate includes a counter electrode having a second main electrode arranged on the first and second source lines and extending in the second direction. A liquid crystal layer is held between the first substrate and the second substrate.

First claim

What is claimed is:

1. A liquid crystal display device formed of a plurality of pixels, comprising:
a first substrate including:
gate lines extending in a first direction,
a capacitance line extending in the first direction,
a first source line and a second source line extending in a second direction orthogonally crossing the first direction,
a pixel electrode including a first belt-like main electrode arranged approximately in a central portion between the first source line and the second source line and extending in the second direction, and a first belt-like sub-electrode covering the gate line between the first source line and the second source line and extending in the first direction, and
a second belt-like sub-electrode covering the capacitance line between the first source line and the second source line on an opposite side of the first belt-like main electrode than the first belt-like sub-electrode, the second belt-like sub-electrode being substantially a same length as the first belt-like sub-electrode;

a second substrate including a counter electrode having a second main electrode arranged on the first and second source lines and extending in the second direction; and
a liquid crystal layer held between the first substrate and the second substrate;
the length of the first belt-like sub-electrode is approximately equal to or longer than the length of the gate line between the first and second source lines in the first direction, the width along with the second direction of the first belt-like sub-electrode is approximately equal to or longer than the width of the gate line along with the second direction, and
the length of the second belt-like sub-electrode is approximately equal to the length between the first and second source lines in the first direction.

2. The liquid crystal display device according to claim 1 , wherein the gate line and the first sub-electrode are arranged at one end portion of the pixel, and a line inversion drive or a dot inversion drive is employed.

3. The liquid crystal display device according to claim 1 , wherein the capacitance line is arranged at another end of the pixel.

4. The liquid crystal display device according to claim 1 , wherein a transmitting portion to contribute to an image display is formed between the first main electrode and the second main electrode.

5. The liquid crystal display device according to claim 1 , wherein
the first substrate further includes a first alignment film to which a rubbing processing is performed in a first rubbing direction, and covering the pixel electrode,
the second substrate further includes a second alignment film to which a rubbing processing is performed in a second rubbing direction which is a reverse direction and in parallel with the first rubbing direction, and covering the counter electrode, and
the first and second rubbing directions respectively cross the first and second main electrodes at an angle.

Assignees

• Hirosawa Jin
• Takeda Arihiro
• Fukuoka Nobuko
• Morita Yusuke
• Daishi Kazuya
• Japan Display Inc

Inventors

• Hirosawa Jin
• Takeda Arihiro
• Fukuoka Nobuko
• Morita Yusuke
• Daishi Kazuya

Classifications

• G02F2001/134381

  Physics · mapped topic

• G02F1/134309 Primary

  characterised by their geometrical arrangement · CPC title

• G02F2001/134318

  Physics · mapped topic

• G02F1/134318

  having a patterned common electrode · CPC title

• G02F1/133302

  Rigid substrates, e.g. inorganic substrates · CPC title