IP Library Granted Patent US 7,825,884
Granted Patent B2
US 7,825,884 · App. 11/131,225 · Granted Nov 2, 2010

Liquid crystal display device

Assignee: Hitachi Displays, Ltd.
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 7,825,884
App. No.
11/131,225
Granted
Nov 2, 2010
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 (9)

1. A transmissive non-reflective type liquid crystal display device comprising:

a first pixel and a second pixel which are arranged close to each other and are allocated to the same color, the first pixel having a first pixel electrode made from a first light transmitting conductive layer and a first counter electrode made from a second light transmitting conductive layer, the second pixel having a second pixel electrode made from the first light transmitting conductive layer and a second counter electrode made from the second light transmitting conductive layer, the respective counter electrode of each pixel being transmissive and closer to a viewer of the liquid crystal display device than the respective pixel electrode of each pixel, the respective pixel electrode of each pixel being transmissive and allowing a backlight to pass into the pixel through the respective pixel electrode of the pixel and out of the pixel through the respective counter electrode of the pixel;

color filters which differ in color tone and are formed on the first pixel and the second pixel; and

a control means for controlling a voltage for driving liquid crystal of the first pixel and a voltage for driving liquid crystal of the second pixel independently from each other.

2. A transmissive non-reflective type liquid crystal display device according to claim 1 , wherein the respective color filters which differ in color tone differ in coordinates on CIE chromaticity coordinates.

3. A transmissive non-reflective type liquid crystal display device according to claim 1 , wherein the second pixel is configured as a pixel which compensates the coordinates displacement in the CIE chromaticity coordinates of display information from the first pixel.

4. A transmissive non-reflective type liquid crystal display device according to claim 1 , wherein the liquid crystal display device is driven in a state that the luminance of the first pixel is set larger than the luminance of the second pixel.

5. A transmissive non-reflective type liquid crystal display device according to claim 1 , wherein a first color filter which is formed in the first pixel and a second color filter which is formed in the second pixel are formed in a state that when the chromaticity coordinates of color which are observed through a color filter of the same color are changed along with a change from a high gray scale to a low gray scale, the color filter which is specified by the coordinates at a starting-point side of the change movement is formed as the first color filter and the color filter which is specified by the coordinates at a terminal-point side of the change movement is formed as the second color filter.

6. A transmissive non-reflective type liquid crystal display device according to claim 1 , wherein the respective pixels which constitute a unit pixel for color display and are allocated to respective colors consisting of red, green and blue are formed in parallel, wherein the respective pixels respectively constitute the first pixels and are allocated to the corresponding colors, and the second pixels which have the same colors as these colors and are arranged close to the first pixels are provided.

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 Oct 14, 2011
From: IPS ALPHA SUPPORT CO., LTD.
To: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
Reel/Frame 027063/0139 →
COMPANY SPLIT PLAN TRANSFERRING FIFTY (50) PERCENT SHARE OF PATENTS Recorded Oct 14, 2011
From: HITACHI DISPLAYS, LTD.
To: IPS ALPHA SUPPORT CO., LTD.
Reel/Frame 027063/0019 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 18, 2005
From: IGETA, KOICHI; ASAKURA, TOSHIKI
To: HITACHI DISPLAYS, LTD.
Reel/Frame 016581/0459 →
Priority Claims (1)
JP 2004-160490 · May 31, 2004 · national
Continuity (1)
Related Publication 20060007088A1 · Jan 12, 2006