Illumination system for reproducing the color temperature range of solar light for illuminating exhibits
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United States of America Patent
Stats
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Aug 13, 2019
Grant Date -
Jan 11, 2018
app pub date -
Sep 22, 2017
filing date -
Mar 23, 2015
priority date (Note) -
In Force
status (Latency Note)
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Abstract
According to one embodiment, an illumination system includes a plurality of white light sources that satisfies −0.2≤[(P(λ)×V(λ))/(P(λ max 1)×V(λ max 1))−(B(λ)×V(λ))/(B(λ max 2)×V(λ max 2))]≤+0.2 where P(λ) is an emission spectrum of a white light source having a specific color temperature, B(λ) is an emission spectrum of black body radiation having a corresponding color temperature, V(λ) is a spectrum of spectral luminous efficiency, λ max 1 is a wavelength at which P(λ)×V(λ) becomes maximum, and λ max 2 is a wavelength at which B(λ)×V(λ) becomes maximum. The respective white light sources have different color temperatures, and light from the respective white light sources is irradiated from different directions to a target.
First Claim
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Family
| Country | kind | publication No. | Filing Date |
|---|---|---|---|
| WO | A1 | WO2016152913 | Mar 23, 2016 |
| EP | B1 | EP3276679 | Mar 23, 2016 |
| JP | B2 | JP6367471 | Mar 23, 2016 |
International Classification(s)
- 2017 Application Filing Year
- H01L Class
- 30754 Applications Filed
- 25260 Patents Issued To-Date
- 82.14 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- H01L Class
- 0 % this patent is cited more than
- 6 Age
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