Title:
LENS SHEET FOR LIQUID CRYSTAL DISPLAY DEVICE AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JP3732253
Kind Code:
B2
Abstract:
PURPOSE: To produce a lens sheet also having a light diffusing effect used in a back light system for a liq. crystal display device.
CONSTITUTION: This lens sheet is a multilayered film consisting of at least two layers, has a prism-shaped part in one surface layer of the film and contains a kneaded light diffusing agent in at least one layer other than the surface layer. The lens sheet is produced by laminating at least two thermoplastic resin layers by a co-extrusion method, pressing a cooling roll 1 having a prism shape against one surface layer and kneading a light diffusing agent in a thermoplastic resin layer other than the surface layer.
Inventors:
Yasuki Suzuura
Application Number:
JP14243495A
Publication Date:
January 05, 2006
Filing Date:
May 18, 1995
Export Citation:
Assignee:
Dai Nippon Printing Co.,Ltd.
International Classes:
G02B5/02; B29C43/22; B29C48/08; B29C59/04; B29C69/00; B29D7/01; B29D11/00; B32B3/30; F21V8/00; G02B1/04; G02B5/04; G02F1/1335; G02F1/13357; (IPC1-7): G02B5/02; B29C69/00; B29D7/01; B29D11/00; F21V8/00; G02B1/04; G02B5/04; G02F1/1335
Domestic Patent References:
| JP57018251A | ||||
| JP4327937A | ||||
| JP57178832A |
Attorney, Agent or Firm:
Satoshi Kanayama