Title:
FLUORESCENT SUBSTANCE, PROCESS FOR PRODUCING THE SAME, AND LIGHT EMITTING DEVICE USING SAID FLUORESCENT SUBSTANCE
Document Type and Number:
WIPO Patent Application WO/2007/037059
Kind Code:
A1
Abstract:
This invention provides a fluorescent substance for use, for example, in the preparation
of one chip-type white LED lighting in combination, for example, with near ultraviolet
or ultraviolet LED or blue LED and having excellent luminescence efficiency
including brightness. The fluorescent substance is characterized in that the
fluorescent substance is represented by general formula MmAaBbOoNn:Z, wherein
element M is at least one element having a valence of II, element A is at least one
element having a valence of III, element B is at least one element having a valence
of IV, O represents oxygen, N represents nitrogen, and element Z represents at
least one activating agent, and a, b, m, n, o, and x satisfy that a =(1+x)×m, b
=(4-x)×m, o=x×m, n=(7-x)×m, and 0≤x≤1, and that,
when the fluorescent substance is excited by light with a wavelength in the range
of 300 nm to 500 nm, the peak wavelength in the resultant luminescence spectrum
is in the range of 500 nm to 620 nm.
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Inventors:
NAGATOMI AKIRA (JP)
SAKANE KENJI (JP)
YAMADA TOMOYA (JP)
SAKANE KENJI (JP)
YAMADA TOMOYA (JP)
Application Number:
PCT/JP2006/314109
Publication Date:
April 05, 2007
Filing Date:
July 14, 2006
Export Citation:
Assignee:
DOWA MINING CO (JP)
NAGATOMI AKIRA (JP)
SAKANE KENJI (JP)
YAMADA TOMOYA (JP)
NAGATOMI AKIRA (JP)
SAKANE KENJI (JP)
YAMADA TOMOYA (JP)
International Classes:
C09K11/64; C09K11/08; C09K11/62; C09K11/66; C09K11/78; C09K11/79; H01L33/50
Foreign References:
| JP2005048105A | 2005-02-24 | |||
| JP2005529229A | 2005-09-29 | |||
| JP2003206481A | 2003-07-22 | |||
| JP2005036038A | 2005-02-10 |
Other References:
See also references of EP 1930393A4
Attorney, Agent or Firm:
ANIYA, Setuo et al. (Iidabashi Chiyoda-ku, Tokyo 72, JP)
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