LIGHT DIFFUSER PLATE, SURFACE LIGHT SOURCE, AND LIQUID CRYSTAL DISPLAY

• US 20090190067A1
• Filed: 01/22/2009
• Published: 07/30/2009
• Est. Priority Date: 01/30/2008
• Status: Abandoned Application

• Current Assignee: Sumitomo Chemical Company Limited
• Original Assignee: Sumitomo Chemical Company Limited
• Inventors: SAKAMOTO, Takashi, HAMAMATSU, Toyohiro
• Application Number:
  US12/357,430
• Publication Number:
  US 20090190067A1
• Time in Patent Office: Days
• US Class Current: 349/64
• CPC Class Codes: G02B 5/0242 by means of dispersed particles
• CPC Class Codes: G02B 5/0278 used in transmission
• CPC Class Codes: G02F 1/133606 including a specially adapted diffusing, scattering or light controlling members

Abstract

An object of the present invention is to provide a light diffuser plate sufficiently suppressed in its yellowish coloring or the like and excellent in impact resistance.

The present invention relates to a light diffuser plate comprises a base layer which contains a styrenic resin and light diffuser particles, and a surface layer which contains a polycarbonate resin and which is laminated on at least one surface of the base layer. As the styrenic resin, a styrenic monomer-methacrylic acid copolymer resin is preferably used.

Claims

1. A light diffuser plate, characterized in that a surface layer containing a polycarbonate resin is laminated on at least one surface of a base layer containing a styrenic resin and light diffuser particles.

2. The light diffuser plate of claim 1, wherein said styrenic resin is a styrenic monomer-methacrylic acid copolymer resin.

3. The light diffuser plate of claim 1, wherein a ratio of the thickness of said base layer to the thickness of said surface layer is from 5 to 100.

4. A surface light source comprising a light diffuser plate defined in any one of claims 1 to 3, and a plurality of light sources disposed on the rear side of said light diffuser plate.

5. A liquid crystal display comprising a light diffuser plate defined in any one of claims 1 to 3, a plurality of light sources disposed on the rear side of said light diffuser plate, and a liquid crystal panel disposed on the front side of said light diffuser plate.