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公开(公告)号：US20200008363A1
公开(公告)日：2020-01-09
申请号：US16572524
申请日：2019-09-16
Applicant: NICHIA CORPORATION
Inventor： Mika AMIYA , Kazushige FUJIO , Tomokazu SUZUKI
Abstract: Provided is a light emitting device that includes a light emitting element having a light emission peak wavelength ranging from 380 nm to 490 nm, and a fluorescent material excited by light from the light emitting element and emitting light having at a light emission peak wavelength ranging from 580 nm or more to less than 680 nm. The light emitting device emits light having a ratio R/B of a photon flux density R to a photon flux density B ranging from 2.0 to 4.0 and a ratio R/FR of the photon flux density R to a photon flux density FR ranging from 0.7 to 13.0, the photon flux density R being in a wavelength range of 620 nm or more and less than 700 nm, the photon flux density B being in a wavelength range of 380 nm or more and 490 nm or less, and the photon flux density FR being in a wavelength range of 700 nm or more and 780 nm or less.
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公开(公告)号：US20180000016A1
公开(公告)日：2018-01-04
申请号：US15634401
申请日：2017-06-27
Applicant: NICHIA CORPORATION
Inventor： Mika AMIYA , Kazushige FUJIO , Tomokazu SUZUKI
CPC classification number: A01G7/045 , A01G22/00 , A01G31/00 , H01L33/504 , H01L2224/48247 , H01L2224/48257 , H01L2224/73265 , Y02P60/149
Abstract: Provided is a light emitting device that includes a light emitting element having a light emission peak wavelength ranging from 380 nm to 490 nm, and a fluorescent material excited by light from the light emitting element and emitting light having at a light emission peak wavelength ranging from 580 nm or more to less than 680 nm. The light emitting device emits light having a ratio R/B of a photon flux density R to a photon flux density B ranging from 2.0 to 4.0 and a ratio R/FR of the photon flux density R to a photon flux density FR ranging from 0.7 to 13.0, the photon flux density R being in a wavelength range of 620 nm or more and less than 700 nm, the photon flux density B being in a wavelength range of 380 nm or more and 490 nm or less, and the photon flux density FR being in a wavelength range of 700 nm or more and 780 nm or less.
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公开(公告)号：US20240279541A1
公开(公告)日：2024-08-22
申请号：US18575859
申请日：2022-02-22
Applicant: NICHIA CORPORATION
Inventor： Mika MATSUMOTO , Miyuki KURATA , Kazushige FUJIO
CPC classification number: C09K11/0883 , C09K11/0827 , C09K11/7706 , H01L33/504 , H01L33/505
Abstract: Provided are a light-emitting device, a lighting appliance, and a lighting fixture that emit light that tends to promote melatonin secretion. The light-emitting device, the lighting appliance, and the lighting fixture include a light-emitting element having an emission peak wavelength in a range of 400 nm to 490 nm and a first phosphor having an emission peak wavelength in a range of 570 nm to 680 nm. The emitted light has a correlated color temperature that is 1950 K or less, an average color rendering index Ra that is 40 or greater, a full width at half maximum of an emission spectrum indicating a maximum emission intensity in an emission spectrum of the light-emitting device that is 110 nm or less, and a melanopic ratio MR derived from Equation (1) that is 0.233 or less.
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公开(公告)号：US20230019657A1
公开(公告)日：2023-01-19
申请号：US17929870
申请日：2022-09-06
Applicant: NICHIA CORPORATION
Inventor： Makiko IWASA , Kazushige FUJIO
Abstract: A light emitting device includes a light emitting element having an emission peak wavelength in a range of 380 nm to 420 nm and a fluorescent member including at least one 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 2000 K to 7500 K as measured according to JIS Z8725, and the light emitting device has a spectral distribution in which, when the integral value over a wavelength range of 380 nm to 780 nm is normalized to 100%, the proportion of an integral value over a wavelength range of 380 nm to 420 nm is 15% or more, and the ratio a as defined by the expression (1) is 0.9 or more and 1.6 or less.
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公开(公告)号：US20220349553A1
公开(公告)日：2022-11-03
申请号：US17660723
申请日：2022-04-26
Applicant: NICHIA CORPORATION
Inventor： Mika MATSUMOTO , Kazushige FUJIO
Abstract: A light emitting device comprises a light emitting element having a light emission peak wavelength in a range of 400 nm or more and 490 nm or less and a first fluorescent material having a light emission peak wavelength in a range of 570 nm or more and 680 nm or less, and emits light having a correlated color temperature being 1,950 K or less, an average color rendering index Ra being 51 or more, a full width at half maximum of a light emission peak having a maximum light emission intensity in a light emission spectrum of the light emitting device being 110 nm or less, and a first glare index Ls1/L that is a ratio of a first effective radiance Ls1 to a luminance L being 0.493 or less, wherein Ls1 and L are as defined in the disclosure.
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Patent Agency Ranking
公开(公告)号：US20210074891A1
公开(公告)日：2021-03-11
申请号：US16953649
申请日：2020-11-20
Applicant: NICHIA CORPORATION
Inventor： Kenji ASAI , Kazushige FUJIO
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.
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公开(公告)号：US20210013383A1
公开(公告)日：2021-01-14
申请号：US17028496
申请日：2020-09-22
Applicant: NICHIA CORPORATION
Inventor： Kazushige FUJIO , Masaki KONDO
Abstract: A light-emitting device is provided. The light-emitting device includes a light-emitting element having a peak light-emitting wavelength in the range of 440 nm to 470 nm, and a fluorescent member. The fluorescent member includes a first fluorescent material having a peak light-emitting wavelength in the range of 480 nm to less than 520 nm, a second fluorescent material having a peak light-emitting wavelength in the range of 520 nm to less than 600 nm, and a third fluorescent material having a peak light-emitting wavelength in the range of 600 nm to 670 nm. The light-emitting device has a ratio of an effective radiant intensity for melatonin secretion suppression to an effective radiant intensity for blue-light retinal damage of 1.53 to 1.70 when the light-emitting device emits light with a correlated color temperature of 2700 K to less than 3500 K; 1.40 to 1.70 when the light-emitting device emits light with a correlated color temperature of 3500 K to less than 4500 K; 1.40 to 1.70 when the light-emitting device emits light with a correlated color temperature of 4500 K to less than 5700 K; and 1.35 to 1.65 when the light-emitting device emits light with a correlated color temperature of 5700 K to 7200 K.
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公开(公告)号：US20190371978A1
公开(公告)日：2019-12-05
申请号：US16426918
申请日：2019-05-30
Applicant: NICHIA CORPORATION
Inventor： Makiko IWASA , Kazushige FUJIO
Abstract: A light emitting device includes a light emitting element having an emission peak wavelength in a range of 380 nm to 420 nm and a fluorescent member including at least one 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 2000 K to 7500 K as measured according to JIS Z8725, and the light emitting device has a spectral distribution in which, when the integral value over a wavelength range of 380 nm to 780 nm is normalized to 100%, the proportion of an integral value over a wavelength range of 380 nm to 420 nm is 15% or more, and the ratio a as defined by the expression (1) is 0.9 or more and 1.6 or less.
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公开(公告)号：US20190288165A1
公开(公告)日：2019-09-19
申请号：US16352473
申请日：2019-03-13
Applicant: NICHIA CORPORATION
Inventor： Mika AMIYA , Kazushige FUJIO , Sadakazu WAKUI
IPC: H01L33/50 , A01G7/04 , H01L25/075
Abstract: A light emitting device includes a light emitting element having an emission peak wavelength in a range of 380 nm or more and 490 nm or less, and a red fluorescent material which is excited by the light from the light emitting element to emit light having at least one light emission peak wavelength in a range of 580 nm or more and 680 nm or less, wherein a ratio of the photon flux R of red light in a range of 620 nm or more and 700 nm or less to the photon flux B of blue light in a range of 400 nm or more and 490 nm or less, R/B, is in a range of more than 20 and 200 or less.
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20.发明申请公开(公告)号：US20170250321A1
公开(公告)日：2017-08-31
申请号：US15440719
申请日：2017-02-23
Applicant: NICHIA CORPORATION
Inventor： Kazushige FUJIO , Masaki KONDO
CPC classification number: H01L33/502 , C09K11/025 , C09K11/7734 , H01L33/501 , H01L2224/48091 , H01L2224/48247 , H01L2224/48257 , H01L2224/73265 , H01L2924/181 , H01L2924/00014 , H01L2924/00012
Abstract: A method for producing a fluorescent material is provided. The method includes preparing fluorescent material particles that contain an alkaline earth metal aluminate having a composition represented by (Sr1−x,Eux)4Al14O25, where x satisfies 0.05≦x≦0.4, and a part of Sr may be substituted by at least one element selected from the group consisting of Mg, Ca, Ba, and Zn; causing the prepared fluorescent material particles to come into contact with a liquid medium containing water; removing at least a portion of the contacted liquid medium to obtain purified fluorescent material particles; causing a phosphate compound to adhere to surfaces of the purified fluorescent material particles to obtain fluorescent material particles to which the phosphate compound is adhered; and heat treating the fluorescent material particles to which the phosphate compound is adhered at 500° C. to 700° C.
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