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:
Mar. 22, 2011
Filed:
Apr. 27, 2006
Rong-jun Xie, Tsukuba, JP;
Mamoru Mitomo, Tsukuba, JP;
Naoto Hirosaki, Tsukuba, JP;
Yoshinobu Yamamoto, Tsukuba, JP;
Rong-Jun Xie, Tsukuba, JP;
Mamoru Mitomo, Tsukuba, JP;
Naoto Hirosaki, Tsukuba, JP;
Yoshinobu Yamamoto, Tsukuba, JP;
National Institute for Materials Science, Tsukuba-Shi, Ibaraki, JP;
Abstract
According to the invention, a highly crystalline α-sialon is synthesized to emit highly intense light and a white LED showing an excellent color rendering characteristic is provided by shifting emitted light to the short wavelength side (blue shift). Such an α-sialon is designed so as to be expressed by general formula (Li, Ca, Eu) (SiAl) (ON) wherein the numerical ranges of x, y, z, m and n are respectively 0<x<2.0, 0<y<2.0, 0<z≦0.5 (provided that 0.3≦x+y+z≦2.0), 0<m≦4.0 and 0<n≦3.0.