IP Library Granted Patent US 8,243,238
Granted Patent B2
US 8,243,238 · App. 13/067,387 · Granted Aug 14, 2012

Transflective liquid crystal display device

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Quick Facts
Patent No.
US 8,243,238
App. No.
13/067,387
Granted
Aug 14, 2012
Kind
B2
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 (13)

1. A liquid crystal display device comprising:

a first region and a second region formed in a subpixel,

a plurality of first pixel electrodes belonging to the first region and a plurality of second pixel electrodes belonging to the second region,

a third electrode of planar form of a counter electrode is superimposed below the plurality of the first pixel electrodes and the plurality of the second pixel electrodes through an insulating layer,

wherein a number of first pixel electrodes is smaller than a number of second pixel electrodes,

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

the first region is a transparent part and the second region is a reflective part,

the plurality of second pixel electrodes include a longer electrodes and a shorter electrode, the shorter electrode is sandwiched by longer electrodes, and

a through hole is formed at a region where the shorter electrodes are arranged in the second region.

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

3. The liquid crystal display device according to claim 1 , wherein the plurality of the second pixel electrodes are disposed parallel to each other and form a comb-shaped structure.

4. The liquid crystal display device according to claim 1 , wherein the plurality of the first pixel electrodes are disposed parallel to each other and form a comb-shaped structure.

5. The liquid crystal display device according to claim 3 , wherein the plurality of first pixel electrodes are disposed parallel to each other and form a comb-shaped structure.

Assignments (8)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 10, 2025
From: JAPAN DISPLAY INC
To: MAGNOLIA PURPLE CORPORATION
Reel/Frame 071890/0202 →
CHANGE OF NAME Recorded Nov 17, 2023
From: HITACHI DISPLAYS, LTD.
To: JAPAN DISPLAY EAST, INC.
Reel/Frame 065614/0223 →
CHANGE OF NAME Recorded Nov 17, 2023
From: JAPAN DISPLAY EAST, INC.
To: JAPAN DISPLAY, INC.
Reel/Frame 065614/0644 →
CHANGE OF ADDRESS Recorded Nov 17, 2023
From: JAPAN DISPLAY, INC.
To: JAPAN DISPLAY, INC.
Reel/Frame 065654/0250 →
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 →
MERGER Recorded Dec 13, 2011
From: IPS ALPHA SUPPORT CO., LTD.
To: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
Reel/Frame 027482/0140 →
ATTACHED ARE (1) THE COMPANY SPLIT DOCUMENTS IN JAPANESE WITH ENGLISH TRANSLATION THEREOF AND (2) THE CERTIFICATE OF COMPANY SPLIT DOCUMENT IN JAPANESE WITH ENGLISH TRANSLATION, WHICH TOGETHER CONVEY 50% OWNERSHIP OF THE REGISTERED PATENTS AS LISTED IN THE ATTACHED TO EACH OF THE RECEIVING PARTIES (SEE PAGE 10, EXHIBIT 2-1, SECTION 1 OF THE ENGLISH TRANSLATION OF THE COMPANY SPLIT PLAN.) Recorded Dec 13, 2011
From: HITACHI, DISPLAYS, LTD.
To: HITACHI DISPLAYS, LTD.; IPS ALPHA SUPPORT CO., LTD.
Reel/Frame 027615/0589 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 27, 2011
From: IMAYAMA, HIROTAKA; MORIMOTO, MASATERU
To: HITACHI DISPLAYS, LTD.
Reel/Frame 026450/0415 →