Title:
LIGHT-EMITTING DEVICE, AND ILLUMINATING DEVICE AND IMAGE DISPLAY USING SAME
Document Type and Number:
WIPO Patent Application WO/2006/003932
Kind Code:
A1
Abstract:
For the purpose of improving the luminance and color rendering properties of a light-emitting device which comprises a phosphor as a wavelength conversion material and a semiconductor light-emitting element emitting visible light, there is used, as the phosphor, a mixture of two or more phosphors of one or more kinds selected from the group consisting of oxides, oxynitrides and nitrides. In this connection, the luminous efficiency of each phosphor in the mixture when it is excited by visible light from the semiconductor light-emitting element is not less than 35% at room temperature. In addition, the mixture contains a first phosphor and a second phosphor which is different from the first phosphor and absorbs the light emitted from the first phosphor, and the first phosphor is contained in an amount of 85% by weight relative to the mixture of the phosphors.
Inventors:
SHIMOMURA YASUO (JP)
KANEDA HIDEAKI (JP)
KIJIMA NAOTO (JP)
KANEDA HIDEAKI (JP)
KIJIMA NAOTO (JP)
Application Number:
PCT/JP2005/011941
Publication Date:
January 12, 2006
Filing Date:
June 29, 2005
Export Citation:
Assignee:
MITSUBISHI CHEM CORP (JP)
SHIMOMURA YASUO (JP)
KANEDA HIDEAKI (JP)
KIJIMA NAOTO (JP)
SHIMOMURA YASUO (JP)
KANEDA HIDEAKI (JP)
KIJIMA NAOTO (JP)
International Classes:
H01L33/50; H01L33/54; H01L33/56; H01L33/62; (IPC1-7): H01L33/00; C09K11/08; C09K11/62; C09K11/64; C09K11/78; C09K11/79
Foreign References:
| JP2003243715A | 2003-08-29 | |||
| JP2003133595A | 2003-05-09 | |||
| JP2004134805A | 2004-04-30 | |||
| JP2003064358A | 2003-03-05 | |||
| JP2005109085A | 2005-04-21 |
Other References:
HIROSAKI N. ET AL: "Sialon Keikotai", DAI 51 KAI OYO BUTSURIGAKU KANKEI RENGO KOENKAI KOEN YOKOSHU, vol. 51, no. 3, 28 March 2004 (2004-03-28), pages 1610, XP002997716
OHKUBO K. ET AL: "Absolute Fluorescent Quantum Efficiency of NBS Phospor Standards Samples", JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN, vol. 83, no. 2, February 1999 (1999-02-01), pages 87 - 93, XP002997717
NARITA K. ET AL: "Relative Quantum Efficiency of Various Lamp Phosphors", JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN, vol. 69, no. 2, February 1985 (1985-02-01), pages 65 - 69, XP002997718
HIROSAWA I. ET AL: "Sekishoku Chikkabutsu Keikotai (CaAlSiN3:Eu2+) no Hakko Tokusei", DAI 65 KAI OYO BUTSURIGAKU KANKEI RENGO KOENKAI KOEN YOKOSHU, vol. 65, no. 3, 1 September 2004 (2004-09-01), pages 1282 - 1283, XP002997719
See also references of EP 1783839A4
OHKUBO K. ET AL: "Absolute Fluorescent Quantum Efficiency of NBS Phospor Standards Samples", JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN, vol. 83, no. 2, February 1999 (1999-02-01), pages 87 - 93, XP002997717
NARITA K. ET AL: "Relative Quantum Efficiency of Various Lamp Phosphors", JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN, vol. 69, no. 2, February 1985 (1985-02-01), pages 65 - 69, XP002997718
HIROSAWA I. ET AL: "Sekishoku Chikkabutsu Keikotai (CaAlSiN3:Eu2+) no Hakko Tokusei", DAI 65 KAI OYO BUTSURIGAKU KANKEI RENGO KOENKAI KOEN YOKOSHU, vol. 65, no. 3, 1 September 2004 (2004-09-01), pages 1282 - 1283, XP002997719
See also references of EP 1783839A4
Attorney, Agent or Firm:
Sanada, Tamotsu (10-31 Kichijoji-honcho 1-chome Musahino-sh, Tokyo ., JP)
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