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:
Apr. 23, 2002
Filed:
Nov. 30, 1999
Minebea Co., Ltd., Miyota, JP;
Abstract
The invention describes a light reflection pattern to spread the volume of the emitted light from a bar-like light source with a plurality of grooves provided along a transparent substrate and plane portions adjacent to the grooves. By setting the inclined angle of the grooves along the transparent substrate the light is introduced with a high efficiency to a liquid crystal display device in the direction perpendicular to the substrate. By restricting the ratio of the width of the grooves to the pitch that is the occupied area in the range of 0.01-0.15 (preferably 0.01-0.1) the ratio becomes one in which the duplicate image component is not recognized by the naked eyes while image brightness is maintained.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile