Phosphor and light-emitting device

Inactive Publication Date: 2012-10-11
KOITO MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0016]According to this embodiment, a light-emitting device which emits light with a relatively low color temperature with a power consumption lower than that of conventional incandescent lamps can be achieved.
[0017]The light-emitting device may

Problems solved by technology

Unfortunately, the light-emitting devices described above tend to have a color temp

Method used

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  • Phosphor and light-emitting device
  • Phosphor and light-emitting device
  • Phosphor and light-emitting device

Examples

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Effect test

Example

EXAMPLE

[0132]In this example, phosphors 1 and 13 were used as the first and second phosphors, respectively, and a light-emitting device was prepared using a phosphor paste containing a mixture of them. In this example, a phosphor mixture of phosphors 1 and 9 (2:1 in weight ratio) was used.

COMPARATIVE EXAMPLE

[0133]In this comparative example, phosphors 6 and 13 were used as the first and second phosphors, respectively, and a light-emitting device was prepared using a phosphor paste containing a mixture of them. In this example, a phosphor mixture of phosphors 6 and 9 (2:1 in weight ratio) was used.

[0134]Section 91.01

[0135]In an integrating sphere, a current of 350 mA was allowed to flow through the light-emitting device of each of the example and the comparative example so that light was emitted from it, and the luminous flux ratio and optical spectrum of the emission were measured with a spectrometer (CAS140B-152, manufactured by Instrument Systems Corporation). The results of th...

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PUM

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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.

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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Application Information

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IPC IPC(8): C09K11/78C09K11/79H01L33/50
CPCC09K11/7734C09K11/7739H01L33/502H01L33/504H05B33/14H01L2224/48091H01L2224/45144H01L2224/73265H01L2924/00014H01L2924/00H01L2224/45139H01L2924/181H01L2924/00011C09K11/77342H01L2924/00012H01L2224/45015H01L2924/207H01L2924/01049C09K11/61C09K11/08H01L33/50
Inventor SASAKI, YASUTAKADAICHO, HISAYOSHIAOYAGI, SHINOBUSAWA, HIROSHI
Owner KOITO MFG CO LTD
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