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公开(公告)号：US11437549B2
公开(公告)日：2022-09-06
申请号：US16953649
申请日：2020-11-20
Applicant: NICHIA CORPORATION
Inventor： Kenji Asai , Kazushige Fujio
IPC: H01L33/50
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：US10978620B2
公开(公告)日：2021-04-13
申请号：US16203025
申请日：2018-11-28
Applicant: NICHIA CORPORATION
Inventor： Mika Amiya , Kazushige Fujio , Tomokazu Suzuki
Abstract: Provided are a light emitting device and an illumination device. The light emitting device is provided with a light emitting element having a light emission peak wavelength in a wavelength range of 380 nm or more and 490 nm or less, a first 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 wavelength range of 580 nm or more and less than 680, and a second 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 wavelength range of 680 nm or more and 800 nm or less, wherein a ratio R/B of a photon flux R of red light in a wavelength range of 620 nm or more and less than 700 nm to a photon flux B of blue light in a wavelength range of 400 nm or more and 490 nm or less is more than 4 and 50 or less, a ratio R/Fr of the photon flux R to a photon flux Fr of far-red light in a wavelength range of 700 nm or more and 780 nm or less is 0.1 or more and 10 or less, and the second fluorescent material contains at least one fluorescent material selected from the group consisting of a first aluminate fluorescent material and a second aluminate fluorescent material.
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公开(公告)号：US20190165221A1
公开(公告)日：2019-05-30
申请号：US16203025
申请日：2018-11-28
Applicant: NICHIA CORPORATION
Inventor： Mika Amiya , Kazushige Fujio , Tomokazu Suzuki
Abstract: Provided are a light emitting device and an illumination device. The light emitting device is provided with a light emitting element having a light emission peak wavelength in a wavelength range of 380 nm or more and 490 nm or less, a first 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 wavelength range of 580 nm or more and less than 680, and a second 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 wavelength range of 680 nm or more and 800 nm or less, wherein a ratio R/B of a photon flux R of red light in a wavelength range of 620 nm or more and less than 700 nm to a photon flux B of blue light in a wavelength range of 400 nm or more and 490 nm or less is more than 4 and 50 or less, a ratio R/Fr of the photon flux R to a photon flux Fr of far-red light in a wavelength range of 700 nm or more and 780 nm or less is 0.1 or more and 10 or less, and the second fluorescent material contains at least one fluorescent material selected from the group consisting of a first aluminate fluorescent material and a second aluminate fluorescent material.
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公开(公告)号：US12163632B2
公开(公告)日：2024-12-10
申请号：US17660784
申请日：2022-04-26
Applicant: NICHIA CORPORATION
Inventor： Mika Matsumoto , Kazushige Fujio
IPC: F21K9/64 , C09K11/77 , F21W131/103 , F21Y115/10
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 70 or more, a full width at half maximum of a light emission peak having the maximum light emission intensity being 110 nm or less, and a ratio B/L of an effective radiance B to a luminance L being 0.151 or less, wherein the luminance of light emitted by the light emitting device in a range of 300 nm or more and 800 nm or less when B and L is as defined in the disclosure.
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公开(公告)号：US11502226B2
公开(公告)日：2022-11-15
申请号：US16983470
申请日：2020-08-03
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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Patent Agency Ranking
公开(公告)号：US11133441B2
公开(公告)日：2021-09-28
申请号：US16586883
申请日：2019-09-27
Applicant: NICHIA CORPORATION
Inventor： Kazushige Fujio , Sadakazu Wakui
Abstract: Provided is a light emitting device, comprising: a light emitting element including a light emission peak wavelength in a range of 440 nm or more and 470 nm or less; a first fluorescent material having a light emission peak wavelength in a range of 480 nm or more and 518 nm or less; a second fluorescent material having a light emission peak wavelength in a range of 510 nm or more and less than 590 nm and having an x value of the chromaticity coordinate in CIE1931 in a range of 0.27 or more and 0.40 or less; and a third fluorescent material having a light emission peak wavelength in a range of 590 nm or more and 670 nm or less. The light emitting device is capable of reducing the human eye fatigue and having a light emission spectrum with excellent visual work.
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公开(公告)号：US11056620B2
公开(公告)日：2021-07-06
申请号：US16880532
申请日：2020-05-21
Applicant: NICHIA CORPORATION
Inventor： Mika Amiya , Kazushige Fujio , Sadakazu Wakui
IPC: H01L33/50 , H01L25/075 , A01G7/04
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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公开(公告)号：US10700243B2
公开(公告)日：2020-06-30
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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19.发明授权公开(公告)号：US10153405B2
公开(公告)日：2018-12-11
申请号：US15440719
申请日：2017-02-23
Applicant: NICHIA CORPORATION
Inventor： Kazushige Fujio , Masaki Kondo
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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公开(公告)号：US09670403B2
公开(公告)日：2017-06-06
申请号：US14581160
申请日：2014-12-23
Applicant: Nichia Corporation
Inventor： Koji Kajikawa , Kazushige Fujio
CPC classification number: C09K11/025 , C09K11/645 , H01L33/502 , H01L2224/48091 , H01L2224/48247 , H01L2224/48257 , H01L2224/73265 , H01L2924/181 , H01S5/005 , H01S5/32341 , H01L2924/00014 , H01L2924/00012
Abstract: A fluoride fluorescent material, comprising: a fluoride particles having a chemical composition represented by the formula (I): A2[M1−aMn4+aF6] (I) wherein A is at least one cation selected from the group consisting of K+, Li+, Na+, Rb+, Cs+ and NH4+; M is at least one element selected from the group consisting of elements from Group 4 of the periodic table and elements from Group 14 of the periodic table; and variable a satisfies 0
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