Phosphor and light-emitting device

US20120256222A1Inactive Publication Date: 2012-10-11KOITO MFG CO LTD
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
KOITO MFG CO LTD
Publication Date
2012-10-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

A phosphor has the general formula (M2x,M3y,M4z)mM1O3X(2 / n), wherein M1 represents at least one element including at least Si and selected from the group consisting of Si, Ge, Ti, Zr, and Sn, M2 represents at least one element including at least Ca and selected from the group consisting of Ca, Mg, Cd, Co, and Zn, M3 represents at least one element including at least Sr and selected from the group consisting of Sr, Ra, Ba, and Pb, X represents at least one halogen element, M4 represents at least one element including at least Eu2+ and selected from the group consisting of rare-earth elements and Mn, m is in the range 1≦m≦4 / 3, n is in the range 5≦n≦7.
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Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is based upon and claims the benefit of priority from the prior Japan Patent Application No. PCT / JP2010 / 006793, filed on Nov. 19, 2010, Japanese Patent Application No. 2010-0232699, filed on Oct. 15, 2010, and Japanese Patent Application No. 2009-0289201, filed on Dec. 21, 2009, the entire contents of which are incorporated herein by referenceBACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] The invention relates to a phosphor (fluorescent material) which is excited efficiently by ultraviolet light or short-wavelength visible light to emit light, and to a light-emitting device produced therewith.

[0004] 2. Description of the Related Art

[0005] A variety of light-emitting devices are known, which are configured to produce light of the desired color by using a combination of a light-emitting element and phosphors which are excited by the light emitted from the light-emitting element and producing light in a wavele...

Claims

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