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:
Sep. 04, 2007
Filed:
Feb. 02, 2005
Takayasu Sado, Chiba, JP;
Makoto Kurihara, Chiba, JP;
Katsunori Honma, Chiba, JP;
Naofumi Yamauchi, Chiba, JP;
Takayasu Sado, Chiba, JP;
Makoto Kurihara, Chiba, JP;
Katsunori Honma, Chiba, JP;
Naofumi Yamauchi, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
Adjustments during assembly of an illuminating unit having a conventional light pipe in order to position the light pipe and a light guide plate are laborious. Further, a minute prism group having a pitch on the order of 100 μm must be provided to a side surface of the light pipe in order to uniformly guide illuminating light to the light guide plate. An illuminating unit of the present invention is provided with a light guide plate having an illuminating surface that is illuminated by light from a point light source, and a light pipe having an incident surface to which light from the point light source is made incident and an emerging portion from which the light emerges to the light guide plate. The emerging portion and the light guide plate are integrally joined.