logo

For the Inventor, By the Inventor

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.:

US 8858059 B1

PDFFull Text
Date of Patent:
Oct. 14, 2014

Filed:

Mar. 07, 2012

Surface illumination device

Applicants:

Mitsuru Okuda, Shiga, JP;

Masayuki Shinohara, Kyoto, JP;

Kazuhide Hirota, Shiga, JP;

Kazuyuki Okada, Shiga, JP;

Inventors:

Mitsuru Okuda, Shiga, JP;

Masayuki Shinohara, Kyoto, JP;

Kazuhide Hirota, Shiga, JP;

Kazuyuki Okada, Shiga, JP;

Assignee:

Omron Corporation, Kyoto, JP;

Attorney:

Osha Liang LLP

Primary Examiner:

Tracie Y Green

Int. Cl.
CPC ...
F21V 8/00 (2006.01); C22C 38/06 (2006.01); C22C 38/42 (2006.01); C22C 38/48 (2006.01); G09F 13/18 (2006.01); C22C 38/46 (2006.01); C22C 38/52 (2006.01); C22C 38/00 (2006.01); C22C 38/58 (2006.01); C22C 38/02 (2006.01); C22C 38/44 (2006.01); C22C 38/54 (2006.01); C22C 38/04 (2006.01); C22C 38/50 (2006.01); H04M 1/22 (2006.01);
U.S. Cl.
CPC ...
C22C 38/58 (2013.01); C22C 38/06 (2013.01); C22C 38/42 (2013.01); C22C 38/48 (2013.01); G09F 13/18 (2013.01); C22C 38/46 (2013.01); C22C 38/52 (2013.01); C22C 38/008 (2013.01); G02B 6/0011 (2013.01); G02B 6/0036 (2013.01); C22C 38/001 (2013.01); C22C 38/02 (2013.01); H04M 1/22 (2013.01); C22C 38/44 (2013.01); G02B 6/006 (2013.01); C22C 38/54 (2013.01); C22C 38/04 (2013.01); C22C 38/50 (2013.01);
Abstract

A surface illumination device has a light source and a light guide plate having a light-emitting surface. The light guide plate guides light from the light source such that the light is emitted from a display region of the light-emitting surface. A plurality of first deflection patterns having deflection inclined surfaces and a plurality of second deflection patterns having deflection inclined surfaces are formed in the display region in at least one of the light-emitting surface of the light guide plate and an opposite surface to the light-emitting surface. When viewed from a direction perpendicular to the light-emitting surface of the light guide plate, the first deflection pattern is disposed such that an angle formed by a line normal to the deflection inclined surface and a direction connecting the light source and the first deflection pattern is less than or equal to 30°.

Find Patent Forward Citations

Loading…