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Title:
医療施設照明用白色光源システム
Document Type and Number:
Japanese Patent JP6707728
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a white light source system for medical facility illumination, capable of reproducing light emission properties of sunlight a color temperature and a light emission spectrum distribution of which change every moment.SOLUTION: If it is assumed that an emission spectrum of each of a plurality of white light sources is P(λ), an emission spectrum of a black body radiation exhibiting the same color temperature as that of each white light source is B(λ), a spectrum of spectral luminous efficacy is V(λ), a wavelength at which P(λ)×V(λ) becomes maximum is λmax1, and a wavelength at which B(λ)×V(λ) becomes maximum is λmax2, an absolute value of a difference between (P(λ)×V(λ))/(P(λmax1)×V(λmax1)) and (B(λ)×V(λ))/(B(λmax2)×V(λmax2)) is set to be equal to or lower than 0.15. By changing a mixture rate of light from the plurality of white light sources, emission properties of white light emitted from a system are changed continuously over time.SELECTED DRAWING: None

Inventors:
Masahiko Yamakawa
Ryoji Tsuda
Kyomasa Oya
Tatsunori Itaga
Yasuhiro Shirakawa
Junji Taniguchi
Masahiko Yano
Keijiro Sugimura
Hiroshi Miyata
Matsuura Nariaki
Application Number:
JP2015126111A
Publication Date:
June 10, 2020
Filing Date:
June 24, 2015
Export Citation:
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Assignee:
Toshiba Materials Corporation
Osaka Prefectural Hospital Organization
International Classes:
F21S2/00; F21V9/02; F21V9/38; H01L33/50
Domestic Patent References:
JP2010522960A
JP2014086271A
JP2009540599A
JP2009123429A
JP2012195420A
JP2008016861A
Foreign References:
WO2012108065A1
WO2012124267A1
Attorney, Agent or Firm:
Kurata Masatoshi
Nobuhisa Nogawa
Ryuji Mine
Naoki Kono
Katsu Sunagawa
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi