Liquid crystal display device

• US 20080043193A1
• Filed: 10/02/2007
• Published: 02/21/2008
• Est. Priority Date: 04/09/2004
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Hitachi Displays Limited (Japan Display Incorporated)
• Inventors: Yasukawa, Shinji, Ono, Kikuo, Baba, Masashi, Oke, Ryutaro, Tanaka, Masahiro, Tsubokura, Masaki, Takenaka, Yuuichi, Ojima, Kazunori, Yamagishi, Yasuhiko
• Granted Patent: US 7,751,013 B2
• Time in Patent Office: Days
• US Class Current: 349/144
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 2201/52 RGB geometrical arrangements
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0443 with several sub-pixels for the same colour in a pixel, not specifically used to display gradations G09G3/364 takes precedence
• CPC Class Codes: G09G 2310/08 Details of timing specific for flat panels, other than clock recovery
• CPC Class Codes: G09G 2320/0276 for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
• CPC Class Codes: G09G 2320/0673 for control of gamma adjustment, e.g. selecting another gamma curve
• CPC Class Codes: G09G 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127
• CPC Class Codes: G09G 3/3655 Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
• CPC Class Codes: G09G 3/3688 suitable for active matrices only

Abstract

A display device having a display element is configured such that the extending directions of electrodes are made different from each other among upper, lower, left and right pixels.

Claims

1. A display device includes,

a common electrode has a rectangle sharp,

a pixel electrode which is overlapped to the common electrode and has a plurality of slits,

the direction of the slits formed differs between an upper region and a lower region of each pixel,

the slit has the inclination which is not parallel to a gating signal line and the video signal line, the Inclination of the slit is symmetrically formed focusing on the center of the pixel region,

a common signal line is formed in parallel with the gating signal line, the common signal line are connected with the common electrodes, and

a bridge line which connects the common electrode of the pixel region which adjoins in the direction parallel to the gating signal line.

2. A display device according to claim 1, the bridge line is formed on the side toward which the slits converge.

3. A display device according to claim 2, the common signal line is formed on the position of the connecting area of the bridge line and the common electrode.

4. A display device has a plurality of pixel region, each pixel includes

a common electrode has a rectangle sharp,

a pixel electrode which is overlapped to the common electrode and has a plurality of slits,

the direction of the slits formed in the pixel electrode differs between an upper region and a lower region of each pixel,

the slit has the inclination which is not parallel to a gating signal line and the video signal line,

the Inclination of the slit is symmetrically formed focusing on the center of the pixel region,

at least three slits are foamed symmetrically in the center of the pixel region.

5. A display device according to claim 4, the display device displays a black picture periodically.

6. A display device has a plurality of pixel region, each pixel includes

a common electrode has a rectangle sharp,

a pixel electrode which is overlapped to the common electrode and has a plurality of slits,

the direction of the slits formed in the pixel electrode differs between an upper region and a lower region of each pixel region,

the slit of the upper region and the slit of the lower region are arranged in the center of the pixel region to be engaged in turn.