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. 11, 2006
Filed:
Oct. 03, 2003
Yoshinori Shimizu, Tokushima, JP;
Kensho Sakano, Anan, JP;
Yasunobu Noguchi, Tokushima, JP;
Toshio Moriguchi, Anan, JP;
Yoshinori Shimizu, Tokushima, JP;
Kensho Sakano, Anan, JP;
Yasunobu Noguchi, Tokushima, JP;
Toshio Moriguchi, Anan, JP;
Nichia Kagaku Kogyo Kabushiki Kaisha, Tokushima, JP;
Abstract
A light emitting device includes a light emitting component having an active layer of a semiconductor and a phosphor capable of absorbing a part of light emitted from the light emitting component and emitting light of wavelength different from that of the absorbed light, wherein the light emitting component is a LED which has an active layer constituting a gallium nitride based semiconductor containing Indium and is capable of emitting a blue color light with a peak wavelength within the range from 420 to 490 nm. The phosphor is a garnet fluorescent material activated with cerium which is capable of absorbing a part of the blue color light and thereby emitting light having a broad emission spectrum with a peak wavelength existing around the range from 510 to 600 nm and a tail continuing into the region from 700 to 750 nm.