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Title:
LIGHT-EMITTING DEVICE
Document Type and Number:
Japanese Patent JP2005093913
Kind Code:
A
Abstract:

To provide a light-emitting device of an amber color which has a relatively broad emission spectrum, with less color shift.

The light-emitting device comprises a light emitting element which emits light from the ultraviolet to blue color, a first phosphor which is excited by the light emitted from the light-emitting element to emit first light whose wavelength is longer than that of the excitation light, and a second phosphor, comprising a nitride phosphor, which is excited by the light emitted from the light-emitting element to emit second light whose wavelength is further longer than that of the first light. Its emission color is a mixture of the first light and the second light, and the nitride phosphor contains B at a ratio of 1-10,000 ppm.


Inventors:
TAMAOKI HIROTO
KAMESHIMA MASATOSHI
TAKASHIMA MASARU
NAITO TAKAHIRO
Application Number:
JP2003328380A
Publication Date:
April 07, 2005
Filing Date:
September 19, 2003
Export Citation:
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Assignee:
NICHIA KAGAKU KOGYO KK
International Classes:
C09K11/62; C09K11/63; C09K11/64; C09K11/65; C09K11/66; C09K11/67; H01L33/32; H01L33/44; C09K11/59; H01L33/50; H01L33/54; H01L33/56; H01L33/60; H01L33/62; (IPC1-7): H01L33/00; C09K11/59; C09K11/62; C09K11/63; C09K11/64; C09K11/65; C09K11/66; C09K11/67
Domestic Patent References:
JP2003258308A2003-09-12
JPS61179003A1986-08-11
JP2000349345A2000-12-15
JP2005093912A2005-04-07
JP2003243727A2003-08-29
JP2001214162A2001-08-07
JP2003515665A2003-05-07
JP2003206482A2003-07-22
JP2000031531A2000-01-28
JP2001308393A2001-11-02
JPH1187778A1999-03-30
JP2002314143A2002-10-25
Foreign References:
US20030006469A12003-01-09
Attorney, Agent or Firm:
Yasuhiro Toyosu
Hisao Ishii



 
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