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:
May. 05, 2015
Filed:
Nov. 30, 2011
Ryozo Nonogaki, Machida, JP;
Tomohiro Nomiyama, Machida, JP;
Mitsuru Kawagoe, Machida, JP;
Suzuya Yamada, Machida, JP;
Ryozo Nonogaki, Machida, JP;
Tomohiro Nomiyama, Machida, JP;
Mitsuru Kawagoe, Machida, JP;
Suzuya Yamada, Machida, JP;
Denki Kagaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
Provided are an α-SiAlON activated by Eu, which can realize a higher luminance in a light-emitting device such as a white LED, and also a light-emitting device. The α-SiAlON is represented by the general formula: (M)(Eu)(Si)(Al)(O)(N)(wherein M denotes one or more elements including at least Ca, selected from the group consisting of Li, Mg, Ca, Y and lanthanide elements (except for La and Ce)), and is constituted by an α-SiAlON having Eu in the form of a solid solution. The 50% mean area diameter of primary particles of the α-SiAlON is 5 μm or more, and the ratio of the 50% mean area diameter of primary particles to the 50% mean area diameter of secondary particles of the α-SiAlON is preferably 0.56 or more. A light-emitting deviceincludes a light-emitting light sourceand a wavelength conversion member, wherein the wavelength conversion memberincludes a α-SiAlONfor absorbing near-ultraviolet to blue light generated by the light-emitting light sourceto generate yellow to orange light.