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. 25, 2003
Filed:
Dec. 11, 2001
Sadao Nakamura, Fukushima-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A surface light emitting device includes a light source and a light introduction plate having a structure for causing the light from the light source to be incident from a side end surface and to outgo from a light outgoing surface. Grooves are formed in a stripe shape on an opposing surface opposite to the light outgoing surface, and the grooves are formed deeper as they have a longer distance from the light source, and the difference between the depths of adjacent grooves is made larger as they have a distance longer from the light source. A method of manufacturing the surface light emitting device and a liquid crystal device including the surface light emitting device are also disclosed. With this arrangement, the surface light emitting device can obtain a sufficiently quantity of light at any position and the liquid crystal device can display an image in uniform brightness.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile