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. 01, 2013
Filed:
Jun. 10, 2008
Masayuki Shinohara, Nagaokakyo, JP;
Yasuhiro Tanoue, Otsu, JP;
Kazuhide Hirota, Moriyama, JP;
Koichi Takemura, Konan, JP;
Takuma Iwase, Ritto, JP;
Takako Ishikawa, Kusatsu, JP;
Yoshihiro Ueno, Kusatsu, JP;
Morihisa Ota, Kusatsu, JP;
Jun Kishimoto, Ogaki, JP;
Gouo Kurata, Kusatsu, JP;
Yukihiro Takahashi, Nagaokakyo, JP;
Hiroyuki Miyamoto, Yasu, JP;
Masayuki Shinohara, Nagaokakyo, JP;
Yasuhiro Tanoue, Otsu, JP;
Kazuhide Hirota, Moriyama, JP;
Koichi Takemura, Konan, JP;
Takuma Iwase, Ritto, JP;
Takako Ishikawa, Kusatsu, JP;
Yoshihiro Ueno, Kusatsu, JP;
Morihisa Ota, Kusatsu, JP;
Jun Kishimoto, Ogaki, JP;
Gouo Kurata, Kusatsu, JP;
Yukihiro Takahashi, Nagaokakyo, JP;
Hiroyuki Miyamoto, Yasu, JP;
OMRON Corporation, Kyoto, JP;
Abstract
A light guide plate () includes a light introducing section (), which is at a position facing a point light source (), for confining light from the point light source, and a light guide plate main body (), which has a thickness smaller than a thickness at an end of the light introducing section on the point light source side, for outputting the confined light to an outside from a light outputting surface by light outputting means (). The light introducing section () has an inclined surface (), which is inclined from a surface of the light introducing section towards a surface of the light guide plate main body (). The inclined surface () has a directivity converting pattern () for converting a directivity expansion in a thickness direction of the light guide plate of the light entered to the light introducing section () to directivity characteristics tilted towards a direction parallel to a surface direction of the light guide plate. The directivity converting pattern () has a structure in which a plurality of V-shaped groove structures () are lined.