LED Unit of Compact, High Power and Long Lifetime

The encapsulation optical component shaped in an elliptical dome over the LED chip and the mixing of multiple types of fluorescent materials in an appropriate ratio improves colour rendering properties and distribution controllability while suppressing colour variation. The developed technologies ca...

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Published inJournal of Light & Visual Environment Vol. 32; no. 2; pp. 196 - 201
Main Authors SUGIMOTO, Masaru, URANO, Yoji, KUZUHARA, Ikko, HAYASHI, Takao, MASUI, Mikiko, TANAKA, Ken-ichi
Format Journal Article
LanguageEnglish
Published Tokyo The Illuminating Engineering Institute of Japan 2008
Japan Science and Technology Agency
Subjects
compact
CRI
GaN
high power
InGaN
LED
life
luminaire
unit
white
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Abstract The encapsulation optical component shaped in an elliptical dome over the LED chip and the mixing of multiple types of fluorescent materials in an appropriate ratio improves colour rendering properties and distribution controllability while suppressing colour variation. The developed technologies can be applied to produce an LED luminaire that resembles a compact ceiling-light but can be used as a downlight with the light intensity equivalent to a 60W incandescent lamp and light quality comparable to a fluorescent lamp.
AbstractList The encapsulation optical component shaped in an elliptical dome over the LED chip and the mixing of multiple types of fluorescent materials in an appropriate ratio improves colour rendering properties and distribution controllability while suppressing colour variation. The developed technologies can be applied to produce an LED luminaire that resembles a compact ceiling-light but can be used as a downlight with the light intensity equivalent to a 60W incandescent lamp and light quality comparable to a fluorescent lamp.
Author KUZUHARA, Ikko
SUGIMOTO, Masaru
TANAKA, Ken-ichi
HAYASHI, Takao
URANO, Yoji
MASUI, Mikiko
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10.1063/1.111832
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(4) H. Kimura, M. Sugimoto, S. Ishizaki and E. Shiohama: The high power LED unit for lighting, LS10 Toulouse, pp. 181-182, (2004).
(6) M. Sugimoto, I. Kuzuhara, H. Kimura, R. Yokotani, K. Nishioka and S. Ishizaki, MEW Technical Report, High Output White LED Light Source, Vol. 53 (1), pp. 4-9, (2005).
(2) S. Nakamura and G. Fasol: The Blue Laser Diode, GaN Based Light Emitter and Lasers, Springer, Berlin, (1997).
(8) M. Sugimoto, Y. Urano, I. Kuzuhara, T. Hayashi, M. Matsui and K. Tanaka: Compact, High-Power and Long-life LED Unit Lighting Applications, MEW Technical Report, Vol. 55(3), pp. 4-10, (2007) 4.
(1) S. Nakamura, T. Mukai and M. Senoh: Candela-class high-brightness InGaN/AlGaN double-heterostructure blue-light-emitting diodes, Appl. Phys. Lett., Vol. 64, pp. 1687-1689, (1994).
(7) Y. Miyazaki, N. Shimoda, K. Fujiwara, I. Kuzuhara, R. Yokotani and S. Mori: Manufacturing Method of High-Out Low Color-Dispersion LED Packages, MEW Technical Report, Vol. 55 (2), pp. 5-11, (2007).
(5) M. Sugimoto, R. Yokotani, H.Kimura and T. Hashimoto: Lifetime Estimation of High Power White LEDs, LS11 Shanghai, pp. 141-142, (2007).
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SubjectTerms compact
CRI
GaN
high power
InGaN
LED
life
luminaire
unit
white
Title LED Unit of Compact, High Power and Long Lifetime
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