IP Library Granted Patent US 9,035,869
Granted Patent B2
US 9,035,869 · App. 13/901,996 · Granted May 19, 2015

Liquid crystal display device

Inventors: Koichi Igeta (Mobara, JP); Toshiki Asakura (Togane, JP)
Assignees: Japan Display Inc.; Panasonic Liquid Crystal Display Co., Ltd.
G02F1/134336G02F1/133371G02F1/133514G09G3/3648G09G2300/0439G09G2300/0452
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Quick Facts
Patent No.
US 9,035,869
App. No.
13/901,996
Granted
May 19, 2015
Kind
B2
Abstract

The present invention provides a liquid crystal display device which includes a first pixel and a second pixel which are arranged close to each other and are allocated to the same color, and color filters which differ in color tone and are formed on the first pixel and the second pixel, wherein a voltage for driving liquid crystal of the first pixel and a voltage for driving liquid crystal of the second pixel are controlled independently from each other.

Claims (21)

1. A liquid crystal display device comprising:

a first substrate and a second substrate;

a plurality of gate signal lines and a plurality of drain signal lines;

a plurality of pixels arranged in a matrix array, and one of the plurality pixels are surrounded by a pair of the plurality of gate signal lines and a pair of the plurality of drain signal lines;

a TFT, a first electrode, and a second electrode which are formed on the first substrate and in one of the plurality of pixels; and

a liquid crystal layer arranged between the first and the second substrate;

wherein the first electrodes comprises a first part formed in a first divided region of the one pixel and a second part formed in a second divided region of the one pixel,

wherein an angle formed between an edge of the first part and the gate lines differs from an angle formed between an edge of the second part and the gate lines,

wherein a layer thickness of the liquid crystal layer is set uniform over the first divided region and the second divided region, and

wherein the first tone filter and the second tone filter are formed such that when the chromaticity coordinates of color which are observed through a color filter of the same color are changed corresponding to the change from a high gray scale to a low gray scale, a color filter which is specified with coordinates at a starting-point side of the change movement is formed as a first color filter and a color filter which is specified with the coordinates at a terminal-point side of the change movement is formed as a second color filter.

2. A liquid crystal display device according to claim 1 ,

wherein the first electrode is a counter electrode and the second electrode is a pixel electrode connected to the TFT, and

wherein the pixel electrodes comprises a third part formed in the first divided region of the one pixel and a fourth part formed in the second divided region Of the one pixel, and

wherein an angle formed between an edge of the third part and the gate lines differs from an angle formed between an edge of the fourth part and the gate lines.

3. A liquid crystal display device according to claim 1 ,

wherein the first part of the first electrode comprises a first group consisting of a plurality of first electrode parts which are arranged in parallel, and the second part of the first electrode comprises a second group consisting of a plurality of second electrode parts which are arranged in parallel, and

wherein the edge of the first part is an edge of the plurality of first electrode parts, and the edge of the second part is an edge of the plurality of second electrode parts.

4. A liquid crystal display device according to claim 3 ,

wherein the first electrode is a pixel electrode connected to the TFT, and the second electrode is a planer shape counter electrode.

5. A liquid crystal display device according to claim 3 ,

wherein a color filter which is corresponding to the one pixel comprises a first tone filter formed in the first divided region and a second tone filter formed in the second divided region.

Assignments (6)
NUNC PRO TUNC ASSIGNMENT Recorded Nov 17, 2023
From: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
To: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
Reel/Frame 065615/0327 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 22, 2014
From: HITACHI DISPLAYS, LTD.
To: JAPAN DISPLAY EAST, INC.
Reel/Frame 034689/0432 →
CHANGE OF NAME Recorded Dec 22, 2014
From: JAPAN DISPLAY EAST, INC.
To: JAPAN DISPLAY INC.
Reel/Frame 034689/0473 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 24, 2013
From: IGETA, KOICHI; ASAKURA, TOSHIKI
To: HITACHI DISPLAYS, LTD.
Reel/Frame 030482/0473 →
MERGER Recorded May 24, 2013
From: IPS ALPHA SUPPORT CO., LTD.
To: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
Reel/Frame 030482/0524 →
COMPANY SPLIT DOCUMENTS WHICH CONVEY 50% OWNERSHIP TO EACH OF THE RECEIVING PARTIES Recorded May 24, 2013
From: HITACHI DISPLAYS, LTD.
To: HITACHI DISPLAYS, LTD.; IPS ALPHA SUPPORT CO., LTD.
Reel/Frame 030489/0001 →
Priority Claims (1)
JP 2004-160490 · May 31, 2004 · national
Continuity (3)
Continuation 12923566 · Sep 28, 2010
Division 11131225 · May 18, 2005
Related Publication 20130250218A1 · Sep 26, 2013