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:
Dec. 28, 2010
Filed:
Jul. 18, 2007
Kenji Kusano, Tokyo, JP;
Kenji Kusano, Tokyo, JP;
Zeon Corporation, Tokyo, JP;
Abstract
Provided is a direct-type backlight device having a sufficient luminance in a front direction and capable of suppressing a luminance unevenness on a light emitting plane with a reduced electric power consumption. In the direct-type backlight device having linear light sources, a reflecting plateand a light diffusing member 1, a distance (a) between centers of the adjacent two linear light sources is 30 to 65 mm. The light diffusing member 1 has an approximately flat light incident planeA and a light outgoing planeB on which multiple linear prismsare aligned. The linear prismhas two inclined surfacesA having an approximately equal tilt angle against a plane which is perpendicular to a thickness direction of the light diffusing member 1. A relationship of (a)/7<L<(a)/4 is satisfied wherein L is a distance (mm) between a central position S of one image in two images on the light outgoing plane corresponding to one linear light source and a position R at which a center of the one linear light source is projected on the light outgoing plane.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile