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公开(公告)号：US11778705B2
公开(公告)日：2023-10-03
申请号：US17903193
申请日：2022-09-06
Applicant: NICHIA CORPORATION
Inventor： Kei Haraguchi , Kenji Asai , Munetake Fukunaga , Yasuo Fujikawa
Abstract: A lighting control system includes: a light fixture including: a first light emitting device configured to emit light having a first correlated color temperature of 3000 K or less in the CIE1931 color space chromaticity diagram, a second light emitting device configured to emit light having a second correlated color temperature equal to or higher than that of the first correlated color temperature, a third light emitting device configured to emit light having substantially effective emission wavelength in a 320 nm to 420 nm range, and an emission controller configured to cause the light fixture to irradiate illumination light by controlling irradiation percentages of the light emitted from the first, second, and third light emitting devices; and an information processing apparatus communicably connected to the light fixture and including a dimming controller configured to change the irradiation percentages.
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公开(公告)号：US10008643B2
公开(公告)日：2018-06-26
申请号：US15384787
申请日：2016-12-20
Applicant: NICHIA CORPORATION
Inventor： Kenji Asai
CPC classification number: H01L33/504 , C09K11/0883 , C09K11/617 , C09K11/665 , C09K11/7734 , C09K11/7774 , H01L2224/48091 , H01L2224/48247 , H01L2224/48257 , H01L2224/73265 , H01L2924/181 , H01L2924/00014 , H01L2924/00012
Abstract: A light emitting device comprises a light emitting element having an emission peak wavelength in a wavelength range of 430 nm to 470 nm, and a phosphor material comprising at least one type of phosphor selected from the group consisting of a first phosphor and a second phosphor, a third phosphor, a fourth phosphor, and a fifth phosphor having respective compositions represented by formulas (I)-(V): (x−s)MgO.(s/2)Sc2O3.yMgF2.uCaF2.(1−t)GeO2.(t/2)Mt2O3:zMn4+ (I) A2[M1−pF6]:pMn4+ (II) Lu3Al5O12:Ce (III) (Sr,Ca)AlSiN3:Eu (IV) (Ca,Sr,Ba)8MgSi4O16(F,Cl,Br)2:Eu (V) In the formulas (I)-(V), Mt is at least one of Al, Ga, and In; x, y, z, s, t, and u each satisfy 2≤x≤4, 0
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公开(公告)号：US11329197B2
公开(公告)日：2022-05-10
申请号：US16833487
申请日：2020-03-27
Applicant: NICHIA CORPORATION
Inventor： Kenji Asai , Kazushige Fujio
IPC: H01L33/50 , H01L25/075 , H05B47/155 , H05B45/10
Abstract: A light emitting device includes a first light source containing a first light emitting element, and a second light source containing a second light emitting element and a second fluorescent material, the first light source emits light in a region that is demarcated in a chromaticity diagram of the CIE 1931 color coordinate system by a first straight line connecting a first point having x,y of 0.280,0.070 in the chromaticity coordinate and a second point having x,y of 0.280,0.500 in the chromaticity coordinate, a second straight line connecting the second point and a third point having x,y of 0.013,0.500 in the chromaticity coordinate, a purple boundary extending from the first point toward a direction in which x decreases in the chromaticity coordinate, and a spectrum locus extending from the third point toward a direction in which y decreases in the chromaticity coordinate, in a light emission spectrum, a light emission intensity ratio IPM/IPL of a light emission intensity IPM at a wavelength of 490 nm with respect to a light emission intensity IPL at a maximum light emission peak wavelength of the first light emitting element is in a range of 0.22 or more and 0.95 or less, the second light source emits light having a color deviation duv from a blackbody radiation locus in a range of −0.02 or more and 0.02 or less measured according to JIS Z8725 with a correlated color temperature in a range of 1,500 K or more and 8,000 K or less in a chromaticity diagram of the CIE 1931 color coordinate system, and the light emitting device emits mixed color light of light emitted from the first light source and light emitted from the second light source.
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公开(公告)号：US11063188B2
公开(公告)日：2021-07-13
申请号：US16276281
申请日：2019-02-14
Applicant: NICHIA CORPORATION
Inventor： Kenji Asai
Abstract: A light emitting device that is capable of achieving excellent color rendering property is provided. The light emitting device contains a light emitting element having a light emission peak wavelength within a range of 430 nm or more and 470 nm or less, and a fluorescent member. The fluorescent member contains a first fluorescent material that contains an Eu-activated alkaline earth aluminate, a second fluorescent material that contains a Mn-activated fluorogermanate, a third fluorescent material that contains a Ce-activated rare earth aluminate, and a fourth fluorescent material that contains an Eu-activated silicon nitride having Al and at least one of Sr and Ca.
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公开(公告)号：US10959304B2
公开(公告)日：2021-03-23
申请号：US16840525
申请日：2020-04-06
Applicant: NICHIA CORPORATION
Inventor： Kei Haraguchi , Kenji Asai , Munetake Fukunaga , Yasuo Fujikawa
Abstract: A lighting control system includes: a light fixture including a first light emitting device configured to emit light having a correlated color temperature in the range of ±100 K from a prescribed value, a second light emitting device configured to emit light having a correlated color temperature in the range of ±100 K from the prescribed value, and an emission controller configured to cause the light fixture to irradiate illumination light by controlling irradiation percentages of the light emitted from the first light emitting device and the light emitted from the second light emitting device; and an information processing apparatus communicably connected to the light fixture, the information processing apparatus comprising a dimming controller configured to change the irradiation percentages of the light emitted from the first light emitting device and the second light emitting device in accordance with a time of day by transmitting dimming instructions.
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Patent Agency Ranking
公开(公告)号：US11667836B2
公开(公告)日：2023-06-06
申请号：US17657756
申请日：2022-04-03
Applicant: NICHIA CORPORATION
Inventor： Kenji Asai , Kazushige Fujio
IPC: C09K11/77 , H01L25/075 , H01L33/50 , H05B47/155 , H05B45/10
CPC classification number: C09K11/7734 , C09K11/7774 , C09K11/77342 , C09K11/77348 , H01L25/0753 , H01L33/502 , H01L33/507 , H05B45/10 , H05B47/155
Abstract: A light emitting device includes a first light source containing a first light emitting element, and a second light source containing a second light emitting element and a second fluorescent material, the first light source emits light in a region that is demarcated in a chromaticity diagram of the CIE 1931 color coordinate system by a first straight line connecting a first point having x,y of 0.280, 0.070 in the chromaticity coordinate and a second point having x,y of 0.280, 0.500 in the chromaticity coordinate, a second straight line connecting the second point and a third point having x,y of 0.013, 0.500 in the chromaticity coordinate, a purple boundary extending from the first point toward a direction in which x decreases in the chromaticity coordinate, and a spectrum locus extending from the third point toward a direction in which y decreases in the chromaticity coordinate, in a light emission spectrum, a light emission intensity ratio IPM/IPL of a light emission intensity IPM at a wavelength of 490 nm with respect to a light emission intensity IPL at a maximum light emission peak wavelength of the first light emitting element is in a range of 0.22 or more and 0.95 or less, the second light source emits light having a color deviation duv from a blackbody radiation locus in a range of −0.02 or more and 0.02 or less measured according to JIS Z8725 with a correlated color temperature in a range of 1,500 K or more and 8,000 K or less in a chromaticity diagram of the CIE 1931 color coordinate system, and the light emitting device emits mixed color light of light emitted from the first light source and light emitted from the second light source.
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公开(公告)号：US10559725B2
公开(公告)日：2020-02-11
申请号：US16167471
申请日：2018-10-22
Applicant: NICHIA CORPORATION
Inventor： Kenji Asai
Abstract: A light emitting device includes a light emitting element having a peak emission wavelength of 410 nm to 440 nm and a phosphor member. The phosphor member includes a first phosphor having a peak emission wavelength of 430 nm to 500 nm and containing an alkaline-earth phosphate, a second phosphor having a peak emission wavelength of 440 nm to 550 nm and containing at least one of an alkaline-earth aluminate and a silicate containing Ca, Mg, and Cl, a third phosphor having a peak emission wavelength of 500 nm to 600 nm and containing a rare-earth aluminate, a fourth phosphor having a peak emission wavelength of 610 nm to 650 nm and containing a silicon nitride containing Al and at least one of Sr and Ca, and a fifth phosphor having a peak emission wavelength of 650 nm to 670 nm and containing a fluorogermanate.
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公开(公告)号：US10141484B2
公开(公告)日：2018-11-27
申请号：US15605197
申请日：2017-05-25
Applicant: NICHIA CORPORATION
Inventor： Kenji Asai
Abstract: A light emitting device includes a light emitting element having a peak emission wavelength of 410 nm to 440 nm and a phosphor member. The phosphor member includes a first phosphor having a peak emission wavelength of 430 nm to 500 nm and containing an alkaline-earth phosphate, a second phosphor having a peak emission wavelength of 440 nm to 550 nm and containing at least one of an alkaline-earth aluminate and a silicate containing Ca, Mg, and Cl, a third phosphor having a peak emission wavelength of 500 nm to 600 nm and containing a rare-earth aluminate, a fourth phosphor having a peak emission wavelength of 610 nm to 650 nm and containing a silicon nitride containing Al and at least one of Sr and Ca, and a fifth phosphor having a peak emission wavelength of 650 nm to 670 nm and containing a fluorogermanate.
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公开(公告)号：US09735323B2
公开(公告)日：2017-08-15
申请号：US15196964
申请日：2016-06-29
Applicant: NICHIA CORPORATION
Inventor： Kenji Asai , Hiroyuki Watanabe , Shoji Hosokawa
CPC classification number: H01L33/504 , C09K11/00 , C09K11/7734 , C09K11/7774 , H01L2224/48091 , H01L2224/48247 , H01L2224/48257 , H01L2224/73265 , H01L2924/181 , H05B33/14 , H01L2924/00014 , H01L2924/00012
Abstract: A light emitting device includes a light emitting element of a peak emission wavelength in a range of 430 nm to 470 nm and a fluorescent member. The fluorescent member includes a first phosphor including a silicate having a composition that contains at least one element selected from the group consisting of Ca, Sr, and Ba, at least one element selected from the group consisting of Cl, F, and Br, and Mg and Eu, a second phosphor including an aluminate that has a composition containing Lu and Ce, and a third phosphor having emission spectrum with a half bandwidth of 86 nm or less and including a silicon nitride that has a composition containing at least one of Sr or Ca, and containing Al and Eu.
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公开(公告)号：US11470699B2
公开(公告)日：2022-10-11
申请号：US17166450
申请日：2021-02-03
Applicant: NICHIA CORPORATION
Inventor： Kei Haraguchi , Kenji Asai , Munetake Fukunaga , Yasuo Fujikawa
Abstract: A lighting control system includes: a light fixture including a first light emitting device configured to emit light having a correlated color temperature in the range of ±500 K from a prescribed value, a second light emitting device configured to emit light having a correlated color temperature in the range of ±500 K from the prescribed value, and an emission controller configured to cause the light fixture to irradiate illumination light by controlling irradiation percentages of the light emitted from the first light emitting device and the light emitted from the second light emitting device; and an information processing apparatus communicably connected to the light fixture, the information processing apparatus comprising a dimming controller configured to change the irradiation percentages of the light emitted from the first light emitting device and the second light emitting device in accordance with a time of day by transmitting dimming instructions.
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