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:
Oct. 29, 2002
Filed:
Jun. 20, 2000
Takeshi Sano, Niiza, JP;
Hiroyuki Kawae, Niiza, JP;
Sanken Electric Co., Ltd., Saitama-pref., JP;
Abstract
A plastic encapsulated semiconductor light emitting device comprises a plurality of leads , one of which is formed with a dished portion ; a semiconductor light emitting element attached on a bottom surface of the dished portion for electrical connection of the light emitting element across the plurality of leads ; a plastic encapsulant for sealing each end of the leads , and the semiconductor light emitting element ; a light-permeating cover attached to an outer surface of the plastic encapsulant ; and fluorescent particles contained in the cover . As the number of fluorescent particles at the vertex of the upper portion is larger than that of the fluorescent particles in the cylindrical lower portion , the semiconductor light emitting device can emit light with the nearly uniform light wavelength at any angular distance from the central axis of the plastic encapslant
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile