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. 12, 2016
Filed:
Aug. 09, 2012
Keita Kobayashi, Omuta, JP;
Yasuhito Fushii, Omuta, JP;
Kohki Ichikawa, Omuta, JP;
Suzuya Yamada, Machida, JP;
Hideyuku Emoto, Machida, JP;
Keita Kobayashi, Omuta, JP;
Yasuhito Fushii, Omuta, JP;
Kohki Ichikawa, Omuta, JP;
Suzuya Yamada, Machida, JP;
Hideyuku Emoto, Machida, JP;
DENKA COMPANY, LIMITED, Tokyo, JP;
Abstract
A high-brightness phosphor having high-temperature characteristics and long-term reliability, and a white light-emitting device using this phosphor are provided. The phosphor contains a silicate phosphor (A) having a peak wavelength of at least 525 nm but not higher than 535 nm and fluorescence intensity of at least 250% but not higher than 270%; an oxynitride phosphor (B) having a peak wavelength of at least 540 nm but not higher than 545 nm and fluorescence intensity of at least 260% but not higher than 280%; and an oxynitride phosphor (C) having a peak wavelength of at least 645 nm but not higher than 655 nm, wherein the amount of the silicate phosphor (A) is at least 20% but not higher than 35% by mass, the amount of the oxynitride phosphor (B) is at least 50% but not higher than 70% by mass, and the amount of the oxynitride phosphor (C) is at least 10% but not higher than 20% by mass.