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. 02, 2013
Filed:
Jul. 17, 2008
Eiichi Sato, Hachioji, JP;
Kenji Fukuoka, Hachioji, JP;
Eiichi Sato, Hachioji, JP;
Kenji Fukuoka, Hachioji, JP;
Opto Design, Inc., , JP;
Abstract
In a surface lighting unit comprising a footprint portion, a sidewall portion, and an optical reflector with an opening spaced apart by a predetermined distance from the footprint portion. The opening substantially satisfies a relation A=bx+c, assuming A is the open area ratio, i.e. the ratio of the opening area in a preset predetermined region to the area of the preset predetermined region, b and c are constants, and x is the distance from the center of the optical reflector. The opening has a circular non-through hole concentric to the center of the optical reflector, a concentric arcuate hole on the outside thereof, and a plurality of round holes farther on the outside thereof.