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:
Feb. 11, 2003
Filed:
Apr. 27, 2001
Kengo Imamura, Sagamihara, JP;
Kenji Matsumoto, Kawasaki, JP;
Atsushi Udagawa, Sagamihara, JP;
Shinichi Irie, Yamato, JP;
3M Innovative Properties Company, Saint Paul, MN (US);
Abstract
To provide a side light extraction type light fiber capable of extracting light having high brightness at a viewing angle. Means for solving: a light fiber comprising: a core ( ) in the center portion, and a cladding arranged around the core, characterized in that the cladding comprises: (i) a light diffusive layer ( ) comprising a light diffusive portion made of a light diffusive material containing, as a binder, a polymer having a refractive index smaller than that of the core, which is provided in closely contact with the core in a wall thickness of 1 to 300 &mgr;m in a circumferential direction, and (ii) a protective layer ( ) made of a light transmitting resin material, which is formed to integrate with the light diffusive layer and covers the light diffusive layer.