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. 30, 2012
Filed:
Jan. 23, 2009
Norihiro Dejima, Chiba, JP;
Makoto Kurihara, Chiba, JP;
Norihiro Dejima, Chiba, JP;
Makoto Kurihara, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
A lighting device has a light source, a light guiding plate having first and second opposite main surfaces, and a reflector confronting the second main surface of the light guiding plate. The light guiding plate has a light entrance part that introduces light from the light source into the light guiding plate and reflecting parts formed on one of the first and second main surfaces for reflecting light introduced into the light guiding plate toward the first main surface. The reflecting parts are arranged on respective sets of arcs of concentric circles with each concentric circle having the light entrance part as its center. Each of the reflecting parts has a long axis extending in a direction substantially orthogonal to a line connected between a center of the corresponding reflecting part and the center of the light entrance part.