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:
Jun. 05, 2001
Filed:
Nov. 12, 1999
Other;
Abstract
A set of light guide blocks B L,˜B L,provide a tandem arrangement. The light guide block B L,is supplied with light from a primary light source L,. The other primary light sources L,, L,are arranged in recesses formed around distal portions of the light guide blocks B L,, B L,, supplying the light guide blocks B L,, B L,with primary light, respectively. Overlap of mutually neighboring light guide blocks gives tang-shaped overlapping portions,as well as overlapping bands,, thereby avoiding electrodes at both ends of the primary light sources L,, L,from causing short of brightness. The light guide blocks B L,˜B L,may be in the form of unified single guide plate. Primary light sources L,˜L,may have a shape such that electrode sections of both ends are curved. A compact surface light source device with a large emission area is provided.