The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 14, 1999
Filed:
May. 07, 1997
Katsuya Fujisawa, Kurashiki, JP;
Rikuji Watanabe, Kurashiki, JP;
Ikuo Ohnishi, Kurashiki, JP;
Katsuhiko Hayashi, Kurashiki, JP;
Kuraray Co., Ltd., Kurashiki, JP;
Abstract
A light diffusing sheet including a clear film (#1) and two light diffusing layers (#2 and #3) formed consecutively thereon. The diffusing sheet is characterized in that the first light diffusing layer (#2) is a film of clear resin incorporated with a light-diffusing material, and the second light diffusing layer (#3) is a film of clear resin having a corrugated surface structure. The first light diffusing layer (#2) has a thickness of 10 .mu.m to 500 .mu.m and the light diffusing material has a weight concentration of less than 3%. The difference in refractive index between the clear resin and light diffusing material is 0.01 .ltoreq. .DELTA.n .ltoreq. 0.12, and the average particle diameter of the light diffusing material is between 4 .mu.m to 30 .mu.m.