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:
Oct. 14, 2008
Filed:
Mar. 16, 2006
Kenji Sakurai, Kyotanabe, JP;
Makoto Ohhira, Kusatsu, JP;
Gouo Kurata, Nara, JP;
Akihiro Funamoto, Nara, JP;
Shigeru Aoyama, Kyoto, JP;
Kenji Sakurai, Kyotanabe, JP;
Makoto Ohhira, Kusatsu, JP;
Gouo Kurata, Nara, JP;
Akihiro Funamoto, Nara, JP;
Shigeru Aoyama, Kyoto, JP;
OMRON Corporation, Kyoto, JP;
Abstract
A double-side LCD having a surface light source device including a light guide plate and a light source facing one end face of the light guide plate. A plurality of deflection patterns are formed in a surface facing a light outgoing plane of the light guide plate, the deflection pattern includes an inclined plane facing the light source side and a re-incident plane substantially perpendicular to the light outgoing plane. Light from the light source is reflected by the inclined plane and outputted from the light outgoing plane to the LCD. A tilt angle (α) of the inclined plane satisfies: 45°−[Sin(Sin θ/n)]/2≦α≦45°+[Sin(Sin θ/n)]/2, wherein θ is an angle between a direction of peak brightness of outputted light and a direction perpendicular to the light outgoing plane, n is a refractive index of the light guide plate, and θ is within 6-15°.