Transflective liquid crystal display device

• US 20110234958A1
• Filed: 05/27/2011
• Published: 09/29/2011
• Est. Priority Date: 10/13/2006
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Hitachi Displays Limited (Japan Display Incorporated)
• Inventors: Morimoto, Masateru, Imayama, Hirotaka
• Granted Patent: US 8,243,238 B2
• Time in Patent Office: Days
• US Class Current: 349/139
• CPC Class Codes: G02F 1/133555 Transflectors
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]

Abstract

To improve display quality in a transflective liquid crystal display device.

In a transflective liquid crystal display device based on the IPS system according to the present invention, when a liquid crystal layer is of positive type liquid crystal, the initial orientation direction of liquid crystal in the liquid crystal layer is perpendicular to the direction in which a l-display line extends, or angularly displaced within ±2 degrees clockwise with respect to the direction in which the l-display line extends. When the liquid crystal layer is of negative type liquid crystal, the initial orientation direction of liquid crystal in the liquid crystal layer is parallel to the direction in which the l-display line extends, or angularly displaced within ±2 degrees clockwise with respect to the direction in which the l-display line extends.

Claims

1. A liquid crystal display device comprising:

a first region and a second region formed in a subpixel region, a plurality of the first electrodes belong to the first region and a plurality of the second electrodes belong to the second region, wherein

a number of first electrodes is smaller than a number of second electrodes, and

a length of the first region is longer than a length of the second region.

2. The liquid crystal display device according to claim 1, wherein the first region is a transparent part and the second region is a reflective part.

3. The liquid crystal display device according to claim 1, wherein the first region and the second region are rhomboid shapes.

4. The liquid crystal display device according to claim 1, wherein the plurality of second electrodes include a longer electrode and a shorter electrode.

5. The liquid crystal display device according to claim 4, wherein the shorter electrode is sandwiched by longer electrodes.

6. The liquid crystal display device according to claim 4, wherein a through hole is formed at a region where the shorter electrodes are arranged.