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:
Jan. 23, 2007
Filed:
Nov. 19, 2003
Applicants:
Hideaki Nagakubo, Fukushima-ken, JP;
Takenobu Kimura, Fukushima-ken, JP;
Inventors:
Hideaki Nagakubo, Fukushima-ken, JP;
Takenobu Kimura, Fukushima-ken, JP;
Assignee:
Alps Electric Co., Ltd, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21V 7/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A backlightincludes a light source, a light guide platefor introducing light emitted from the light sourcefrom an incidence surfaceprovided on an end and for emitting the light from one surface, a diffusive reflectorprovided such that the surface having a minute concavo-convex portionfaces the other surface of the light guide plate, and a light directivity control sheetprovided on the one surface of the light guide platesuch that the apexesof pyramid-shaped objectsface the opposite side to the light guide plate