公开(公告)号：US20210160979A1

公开(公告)日：2021-05-27

申请号：US17166450

申请日：2021-02-03

Applicant: NICHIA CORPORATION

Inventor： Kei HARAGUCHI ,  Kenji ASAI ,  Munetake FUKUNAGA ,  Yasuo FUJIKAWA

IPC: H05B45/20 ,  H05B45/10

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.

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

IPC: H01L33/50 ,  H05B45/20

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.

公开(公告)号：US20190181308A1

公开(公告)日：2019-06-13

申请号：US16276281

申请日：2019-02-14

Applicant: NICHIA CORPORATION

Inventor： Kenji ASAI

IPC: H01L33/50 ,  C09K11/77 ,  C09K11/66 ,  C09K11/08 ,  H01L33/32

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.

公开(公告)号：US20230010312A1

公开(公告)日：2023-01-12

申请号：US17903193

申请日：2022-09-06

Applicant: NICHIA CORPORATION

Inventor： Kei HARAGUCHI ,  Kenji ASAI ,  Munetake FUKUNAGA ,  Yasuo FUJIKAWA

IPC: H05B45/20 ,  H05B45/10

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.

公开(公告)号：US20200329539A1

公开(公告)日：2020-10-15

申请号：US16840525

申请日：2020-04-06

Applicant: NICHIA CORPORATION

Inventor： Kei HARAGUCHI ,  Kenji ASAI ,  Munetake FUKUNAGA ,  Yasuo FUJIKAWA

IPC: H05B45/20 ,  H05B45/10

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.

公开(公告)号：US20200313045A1

公开(公告)日：2020-10-01

申请号：US16833487

申请日：2020-03-27

Applicant: NICHIA CORPORATION

Inventor： Kenji ASAI ,  Kazushige FUJIO

IPC: H01L33/50 ,  H01L25/075

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.

公开(公告)号：US20220223764A1

公开(公告)日：2022-07-14

申请号：US17657756

申请日：2022-04-03

Applicant: NICHIA CORPORATION

Inventor： Kenji ASAI ,  Kazushige FUJIO

IPC: H01L33/50 ,  H01L25/075

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.

公开(公告)号：US20210136891A1

公开(公告)日：2021-05-06

申请号：US17086278

申请日：2020-10-30

Applicant: NICHIA CORPORATION

Inventor： Junichi EGUCHI ,  Kenji ASAI

IPC: H05B45/28 ,  H01L33/50

Abstract: A lighting device including a first light emitting device that emits light of first chromaticity coordinates and has a high melanopic ratio, a second light emitting device that emits light of second chromaticity coordinates, and a third light emitting device that emits light of third chromaticity coordinates and has a low melanopic ratio, wherein light in a range from a first temperature to a second temperature on the black body radiation locus is included in a triangular area surrounded by a straight line connecting the first chromaticity coordinates and the second chromaticity coordinates, a straight line connecting the second chromaticity coordinates and the third chromaticity coordinates, and a straight line connecting the third chromaticity coordinates and the first chromaticity coordinates, in the chromaticity diagram of the CIE1931 color system.

公开(公告)号：US20170345976A1

公开(公告)日：2017-11-30

申请号：US15605197

申请日：2017-05-25

Applicant: NICHIA CORPORATION

Inventor： Kenji ASAI

IPC: H01L33/50 ,  C09K11/77 ,  C09K11/08 ,  H01L33/52 ,  H01L33/48

CPC classification number: H01L33/504 ,  C09K11/0883 ,  C09K11/7707 ,  C09K11/7721 ,  C09K11/7734 ,  C09K11/7739 ,  H01L33/486 ,  H01L33/507 ,  H01L33/52

Abstract: A light emitting device includes a light emitting element having a peak emission wavelength of 410 nm to 440nm 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.

公开(公告)号：US20170179347A1

公开(公告)日：2017-06-22

申请号：US15384787

申请日：2016-12-20

Applicant: NICHIA CORPORATION

Inventor： Kenji ASAI

IPC: H01L33/50 ,  C09K11/08 ,  C09K11/77 ,  C09K11/66 ,  C09K11/61

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)8AlSiN3: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