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. 03, 2006
Filed:
Dec. 03, 2003
Applicants:
Hideaki Nagakubo, Fukushima-ken, JP;
Koichi Yamamoto, Fukushima-ken, JP;
Inventors:
Hideaki Nagakubo, Fukushima-ken, JP;
Koichi Yamamoto, Fukushima-ken, JP;
Assignee:
Alps Electric Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21V 7/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A backlight devicewherein a light sourceand a light guide platefor introducing light components from the light sourcefrom the incident surfaceprovided on an end surface to emit the light from the surfaceare included, a plurality of the wedge-shaped groovesare formed on the surfaceof the light guide platein stripes in plan view, and micro-irregularitiesare formed between adjacent wedge-shaped groovesis disclosed. A liquid crystal display devicehaving the backlight deviceformed on the back surface of the liquid crystal display unitis disclosed.