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:
Aug. 04, 2015
Filed:
May. 03, 2012
Myeong-ju Shin, Seoul, KR;
Seung-hwan Baek, Seoul, KR;
Yeong-bae Lee, Bucheon-si, KR;
Young-sic Kim, Seoul, KR;
Seok-hyun Nam, Seoul, KR;
Byung-choon Yang, Seoul, KR;
Jong-su Kim, Busan, KR;
Kwang-won Park, Busan, KR;
Yun-hyoung Park, Seoul, KR;
Ji-su Yu, Uijeongbu-si, KR;
Hyung-seok Lim, Busan, KR;
Myeong-Ju Shin, Seoul, KR;
Seung-Hwan Baek, Seoul, KR;
Yeong-Bae Lee, Bucheon-si, KR;
Young-Sic Kim, Seoul, KR;
Seok-Hyun Nam, Seoul, KR;
Byung-Choon Yang, Seoul, KR;
Jong-Su Kim, Busan, KR;
Kwang-Won Park, Busan, KR;
Yun-Hyoung Park, Seoul, KR;
Ji-Su Yu, Uijeongbu-si, KR;
Hyung-Seok Lim, Busan, KR;
Abstract
A silicate phosphor composition is provided having a γ-phase of an orthorhombic crystal structure whose space group is Pbnm 62, and whose composition is represented by the following chemical formula:CaMSiOCeN(0≦<0.5,0<≦0.1,0≦<0.15) In the formula, M represents at least one member selected from the group consisting of Mg, Sr, Ba, Zn, Na, Al, Ga, Ge, P, As and Fe, and N represents at least one member selected from the group consisting of Eu, Mn, Tb, Yband Tm. The silicate phosphor has a maximum absorbance for a wavelength of about 450 nm to about 475 nm corresponding to a main part of a blue excitation light, and has a great stability at a high temperature. As such the silicate phosphor may be used in combination with a blue light source to produce a white light.