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. 02, 2010
Filed:
May. 17, 2007
Hiroshi Yamaguchi, Osaka, JP;
Yuusaku Shimaoka, Osaka, JP;
Hiroshi Yamaguchi, Osaka, JP;
Yuusaku Shimaoka, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Provided is a planar light source device () having a planar light source with uniform luminance distribution by using a laser light source for outputting a beam-like luminous flux. The planar light source device () applies a laser beam from the side surface of a light guide plate () through a scanning mirror () and periodically scans the entire light guide plate. At that time, a light output (P(t)) of the laser light source () is modulated in synchronization with the scanning cycle so that the output is proportional to the temporal differentiation dS/dt of a scanning area (S(t)) from a search start within a scanning period. Thus, changes of the scanning speed and scanning length with time are eliminated and planar lighting with uniform luminance can be performed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile