Title:
LIGHT EMITTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/108194
Kind Code:
A1
Abstract:
Disclosed is a light emitting device which is configured such that white light is obtained by mixing light from phosphors. Specifically disclosed is a light emitting device which comprises: a light emitting element that emits ultraviolet light or short-wavelength visible light having a peak wavelength within the wavelength range of 380-420 nm; a first phosphor which is excited by the ultraviolet light or short-wavelength visible light and emits visible light that has a peak wavelength within the wavelength range of 560-600 nm; a second phosphor which is excited by the ultraviolet light or short-wavelength visible light and emits visible light that is in a complementary color relation with the visible light emitted by the first phosphor; and a light transmitting member, which is a light transmitting layer that covers the light emitting element, and in which the first phosphor and the second phosphor are dispersed. The volume concentration of all the phosphors contained in the light transmitting member is 0.05-10 vol% (inclusive), and the light transmitting member is configured such that the optical path length from entrance of light into the light emitting element to exit to the outside is 0.4-20 mm (inclusive).
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Inventors:
DAICHO HISAYOSHI (JP)
MATSUURA TATSUYA (JP)
KATO KEN (JP)
ENOMOTO KIMINORI (JP)
MATSUURA TATSUYA (JP)
KATO KEN (JP)
ENOMOTO KIMINORI (JP)
Application Number:
PCT/JP2011/000681
Publication Date:
September 09, 2011
Filing Date:
February 08, 2011
Export Citation:
Assignee:
KOITO MFG CO LTD (JP)
DAICHO HISAYOSHI (JP)
MATSUURA TATSUYA (JP)
KATO KEN (JP)
ENOMOTO KIMINORI (JP)
DAICHO HISAYOSHI (JP)
MATSUURA TATSUYA (JP)
KATO KEN (JP)
ENOMOTO KIMINORI (JP)
International Classes:
H01L33/50
Foreign References:
| JP2010027974A | 2010-02-04 | |||
| JP2007204730A | 2007-08-16 | |||
| JP2008140934A | 2008-06-19 | |||
| JP2009091546A | 2009-04-30 | |||
| JP2009231785A | 2009-10-08 | |||
| JP2003110150A | 2003-04-11 | |||
| JP2004115633A | 2004-04-15 | |||
| JP2006148051A | 2006-06-08 | |||
| JP2008016647A | 2008-01-24 | |||
| JPH10107325A | 1998-04-24 | |||
| JP3546650B2 | 2004-07-28 | |||
| JP4208449B2 | 2009-01-14 |
Other References:
TAGUCHI ET AL., 19TH MICROELECTRONICS SYMPOSIUM, COLLECTION OF PAPERS, 2009, pages 197
TAGUCHI ET AL.: "19th Microelectronics Symposium", 2009, COLLECTION OF PAPERS, pages: 197
See also references of EP 2544252A4
TAGUCHI ET AL.: "19th Microelectronics Symposium", 2009, COLLECTION OF PAPERS, pages: 197
See also references of EP 2544252A4
Attorney, Agent or Firm:
MORISHITA, SAKAKI (JP)
Sakaki Morishita (JP)
Sakaki Morishita (JP)
Download PDF:
Claims: