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:
Feb. 19, 2013
Filed:
Sep. 01, 2009
Kenzo Hanawa, Ichihara, JP;
Takaharu Hoshina, Ichihara, JP;
Tomoyuki Takei, Ichihara, JP;
Showa Denko K.K., Tokyo, JP;
Abstract
A light emitting unit () is provided with a resin container () in which a recessed portion () is formed, an anode lead portion () and a cathode lead portion () which are provided so as to be exposed on the bottom surface of the recessed portion (), a semiconductor light emitting element () attached to the cathode lead portion () on the bottom surface () of the recessed portion (), and a sealing resin () provided so as to cover the recessed portion (). The resin container () is produced from a white resin containing titania as a coloring agent. The anode lead portion () and the cathode lead portion () are each configured by forming a silver-plated layer with the gloss level set in the range of 0.3-1.0 inclusive on a metal plate based on a copper alloy or the like. Thus, the efficiency of extraction of light outputted from the light emitting unit is improved.