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:
Nov. 26, 2013
Filed:
Dec. 16, 2011
Gang Ji, Kanagawa-ken, JP;
Moriyuki Tsuchihashi, Kanagawa-ken, JP;
Hidenori Kinoshita, Tokyo, JP;
Hiroyuki Noguchi, Kanagawa-ken, JP;
Fumitake Mizoguchi, Kanagawa-ken, JP;
Gang Ji, Kanagawa-ken, JP;
Moriyuki Tsuchihashi, Kanagawa-ken, JP;
Hidenori Kinoshita, Tokyo, JP;
Hiroyuki Noguchi, Kanagawa-ken, JP;
Fumitake Mizoguchi, Kanagawa-ken, JP;
Lenovo (Singapore) Pte. Ltd., Singapore, SG;
Abstract
Described is an illumination structure suitable for a keyboard light of a portable computer. An example illumination structure includes a transparent acrylic board, a light source, and a light guide. The acrylic board may have a front surface and a rear surface, each of which is flat. The light source is provided at a tilt angle q at which an optical axis is almost at a critical angle with respect to the rear surface of the acrylic board. The light guide is located between the light source and the rear surface. Further, light rays radiated from the light source are refracted by the light guide and the optically-transparent panel, and travel towards the front surface, so as to illuminate the surface.