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. 29, 2012
Filed:
Jul. 14, 2008
Hisayoshi Daicho, Shizuoka, JP;
Takeshi Iwasaki, Shizuoka, JP;
Kiminori Enomoto, Shizuoka, JP;
Koito Manufacturing Co., Ltd., Tokyo, JP;
Abstract
A light emitting device is provided. The light emitting device includes a light emitting element that emits ultraviolet light or short-wavelength visible light; and at least one phosphor that is excited by the ultraviolet light or short-wavelength visible light to emit visible light. The at least one phosphor includes a first phosphor including a composition represented by the formula: MO.aMO.bMX:M, where Mis at least one element selected from the group consisting of Si, Ge, Ti, Zr, and Sn; Mis at least one element selected from the group consisting of Mg, Ca, Sr, Ba, and Zn; Mis at least one element selected from the group consisting of Mg, Ca, Sr, Ba, and Zn; X is at least one halogen element; Mis at least one element essentially including Euselected from the group consisting of rare-earth elements and Mn; a is in the range of 0.1≦a≦1.3; and b is in the range of 0.1≦b≦0.25.