LIGHT EMITTING DEVICE
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United States of America
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May 29, 2019
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May 29, 2019
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Abstract
A light emitting device includes: a light emitting element having an emission peak wavelength in a range of 430 nm to 470 nm; and a fluorescent member including a fluorescent material that is excited by light from the light emitting element for light emission, wherein a mixture of light from the light emitting element and light from the fluorescent material has a correlated color temperature in a range of 1500 K to 11000 K, as measured according to JIS Z8725, the color deviation duv that is a deviation from the black body radiation track on the CIE1931 chromaticity diagram of the mixture of light and is measured according to JIS Z8725 falls within a range of more than 0 to 0.02 or less at a correlated color temperature of 1500 K to 11000 K, and when a value calculated by integrating a product of the spectral distribution of the mixture of light and each relative intensity of a human standard spectral luminous efficiency over a wavelength range of a human visible region is referred to as an integral value a and when a value calculated by integrating a product of the spectral distribution of the mixture of light and each relative intensity of an insect spectral luminous efficiency over a wavelength range where insects exhibit positive phototaxis is referred to as an integral value b, the insect attracting index I defined as a ratio of the integral value b to the integral value a (b/a) is 50% or more and 99% or less of the insect attracting index I0 at the time when the color deviation duv is 0.
First Claim
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
NICHIA CORPORATION | ANAN-SHI |
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
ASAI, Kenji | Naruto-shi, JP | 38 | 174 |
FUJIO, Kazushige | Tokushima-shi, JP | 20 | 30 |
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