IP Library Granted Patent US 7,826,006
Granted Patent B2
US 7,826,006 · App. 12/230,779 · Granted Nov 2, 2010

Display device

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Quick Facts
Patent No.
US 7,826,006
App. No.
12/230,779
Granted
Nov 2, 2010
Kind
B2
Abstract

A panel unit is formed by sandwiching a liquid crystal display panel and a diffusion sheet between a front surface plate having a curved plane and a back surface plate having a curved plane. A light source unit is arranged on a back surface of the panel unit. The diffusion sheet is formed in to an outward convex shape in the same manner as the liquid crystal display panel and hence, due to a lens action of the diffusion sheet, light from the light source unit is collected in the direction toward the center of a screen. Accordingly, it is possible to suppress a phenomenon that brightness in a periphery of the screen is reduced when the screen is viewed from a front side.

Claims (14)

1. A liquid crystal liquid crystal display device comprising:

a liquid crystal display panel;

a diffusion plate; and

a plurality of light sources, wherein

the liquid crystal display panel which is formed into an outward convex shape is provided with a diffusion sheet which is formed into an outward convex shape and is arranged over a back surface of the display panel, the diffusion plate is arranged over a back surface of the diffusion sheet, the plurality of light sources is arranged over a back surface of the diffusion plate, and a radius of curvature of the diffusion sheet is larger than a radius of curvature of the liquid crystal display panel.

2. A liquid crystal display device according to claim 1 , wherein the plurality of light sources is arranged in plane.

3. A liquid crystal display device according to claim 1 , wherein the plurality of light sources is arranged along curved surface, and the curved surface is recessed as viewed from the outside of a screen.

4. A liquid crystal display device comprising:

a liquid crystal display panel;

a diffusion plate; and

a plurality of light sources, wherein

the liquid crystal display panel which is formed into an outward concave shape is provided with a diffusion sheet which is formed into an outward concave shape and is arranged over a back surface of the display panel, the diffusion plate is arranged over a back surface of the diffusion sheet, the plurality of light sources is arranged over a back surface of the diffusion plate, and a radius of curvature of the diffusion sheet is smaller than a radius of curvature of the liquid crystal display panel.

5. A liquid crystal display device according to claim 4 , wherein the plurality of light sources is arranged in plane.

6. A liquid crystal display device according to claim 4 , wherein the plurality of light sources is arranged along curved surface, and the curved plane is recessed as viewed from the outside of a screen.

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 Sep 4, 2008
From: KOGANEZAWA, NOBUYUKI
To: HITACHI DISPLAYS, LTD.
Reel/Frame 021553/0919 →