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. 04, 2014
Filed:
Oct. 31, 2012
Applicant:
Enplas Corporation, Kawaguchi, JP;
Inventor:
Takayoshi Suganuma, Kawaguchi, JP;
Assignee:
Enplas Corporation, Saitama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21V 8/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A light guide panelhaving a reflective sub-wavelength diffraction gratinggenerates zero-order light and minus first-order light in the reflective sub-wavelength diffraction grating, extracts the minus first-order light as outgoing light, and transmits the zero-order light to generate new minus first-order light by satisfying the conditional expressions:sin(1/)<θ  (1)λ/{(sin θ+1)}≦Λ<min[2λ/{(sin θ+1)},λ/{(−sin θ+1)}]  (2)sin{sin θ−λ/(·Λ)}<sin(1/)  (3)where,