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公开(公告)号：US20240247781A1
公开(公告)日：2024-07-25
申请号：US18598177
申请日：2024-03-07
Inventor： Mitsuru NITTA , Shozo OSHIO , Takeshi ABE
IPC: F21V9/30 , A61B1/04 , A61B1/06 , A61B5/00 , A61N5/06 , A61N5/067 , F21W131/20 , F21Y115/30
CPC classification number: F21V9/30 , A61B5/0071 , A61N5/062 , A61N5/067 , A61B1/043 , A61B1/0653 , F21W2131/20 , F21Y2115/30
Abstract: A light-emitting device includes: a light source that radiates primary light; and a first phosphor that absorbs the primary light and converts the primary light into first wavelength-converted light having a longer wavelength than the primary light, the first wavelength-converted light includes fluorescence based on electron energy transition of Cr3+, and a fluorescence spectrum of the first wavelength-converted light has a maximum fluorescence intensity value in region of a wavelength exceeding 710 nm.
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公开(公告)号：US20200024514A1
公开(公告)日：2020-01-23
申请号：US16486828
申请日：2017-10-18
Inventor： Shozo OSHIO , Takeshi ABE
Abstract: A light-emitting device 1 includes: a solid-state light-emitting element 10 that radiates a laser beam L; and a wavelength converter 50 including a plurality of types of phosphors which receive the laser beam L and radiate light. The phosphors 50 included in the wavelength converter are substantially composed of a Ce3+-activated phosphor. Then, output light of the light-emitting device 1 has a light component across a wavelength range of at least 420 nm or more and less than 700 nm. The light-emitting device 1 is capable of radiating light with high color rendering properties over a wide wavelength range.
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公开(公告)号：US20180274737A1
公开(公告)日：2018-09-27
申请号：US15761944
申请日：2016-10-26
Inventor： Takeshi ABE , Shozo OSHIO , Hiroshi ASANO , Yosuke HONDA
Abstract: A light emitting device includes a first wavelength converter that contains a first phosphor that absorbs at least part of primary light radiated by a radiation source and converts the primary light absorbed into secondary light, and a second wavelength converter that contains a second phosphor that absorbs at least part of the secondary light and converts the secondary light absorbed into tertiary light. The lifetime of fluorescence emitted from the second phosphor is longer than the lifetime of fluorescence emitted from the first phosphor, and the light density of the secondary light, with which the second wavelength converter is irradiated, is lower than the light density of the primary light, with which the first wavelength converter is irradiated.
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公开(公告)号：US20220239057A1
公开(公告)日：2022-07-28
申请号：US17613792
申请日：2020-04-21
Inventor： Mitsuru NITTA , Takeshi ABE , Shozo OSHIO
Abstract: A light emitting device includes a light source that emits a primary light having a light energy density exceeding 0.5W/mm2, and a first phosphor that absorbs the primary light to convert the primary light into a first wavelength-converted light having a wavelength longer than that of the primary light. The first phosphor includes a compound serving as a host, the compound being a simple oxide including one kind of metal element or a composite oxide including a plurality of different kinds of the simple oxide as an end member. When an energy conversion value at a peak wavelength of the primary light is E1 electron volts and an energy conversion value at a fluorescence peak wavelength of the first wavelength-converted light is E2 electron volts, a bandgap energy of a crystal of the simple oxide is larger than a sum of the E1 electron volts and the E2 electron volts.
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5.发明申请公开(公告)号：US20220218191A1
公开(公告)日：2022-07-14
申请号：US17604418
申请日：2020-02-19
Inventor： Takeshi ABE , Shozo OSHIO , Mitsuru NITTA
Abstract: A light emitting device includes a first wavelength converter that converts the primary light into a first wavelength-converted light; and a second wavelength converter that converts the primary light into a second wavelength-converted light. The first wavelength-converted light is a fluorescence having a light component over an entire wavelength range of 700 nm or more to 800 nm or less and having a peak where a fluorescence intensity shows a maximum value in a wavelength range of 700 nm or more, and the second wavelength-converted light is a fluorescence having a peak where a fluorescence intensity shows a maximum value in a wavelength range of 380 nm or more to less than 700 nm. The light emitting device emits a first output light including the first wavelength-converted light and a second output light including the second wavelength-converted light alternately in time.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20220192477A1
公开(公告)日：2022-06-23
申请号：US17603910
申请日：2020-02-19
Inventor： Takeshi ABE , Shozo OSHIO , Mitsuru NITTA
Abstract: A light emitting device includes a light source configured to emit a primary light, a first phosphor that absorbs the primary light and converts the primary light into a first wavelength-converted light having a wavelength longer than that of the primary light, and a second phosphor that absorbs the primary light and converts the primary light into a second wavelength-converted light having a wavelength longer than that of the primary light. The first wavelength-converted light is a fluorescence having a light component over an entire wavelength range of 700 nm or more to 800 nm or less. The second wavelength-converted light is a fluorescence having a peak where a fluorescence intensity shows a maximum value in a wavelength range of 380 nm or more to less than 700 nm. The first wavelength-converted light has a 1/10 afterglow time longer than that of the second wavelength-converted light.
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公开(公告)号：US20220175250A1
公开(公告)日：2022-06-09
申请号：US17604419
申请日：2020-02-19
Inventor： Takeshi ABE , Shozo OSHIO , Mitsuru NITTA
Abstract: A wavelength converter includes a first phosphor activated with Cr3+; and a second phosphor activated with at least one ion of Ce3+ or Eu2+. A fluorescence spectrum of a fluorescence emitted by the second phosphor has a peak where a fluorescence intensity shows a maximum value in a wavelength range of 500 nm or more to less than 580 nm. The wavelength converter emits a fluorescence having a light component over an entire range of 500 nm or more to less than 580 nm. The wavelength converter emits a light having a spectrum in which a ratio of a minimum light emission intensity to a maximum light emission intensity is 40% or less in a wavelength range of 550 nm or more to 700 nm or less.
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公开(公告)号：US20220099274A1
公开(公告)日：2022-03-31
申请号：US17409251
申请日：2021-08-23
Inventor： Toshiaki TAKENAKA , Shintaro HAYASHI , Shogo MOTEGI , Yudai SHIBATA , Fumiya YAGI , Takeshi ABE
Abstract: A light source device, includes: a plurality of excitation light sources that emit primary light; an optical member that condenses the primary light; a fluorescent unit that emits secondary light including the primary light and wavelength converted light which is at least some of the primary light on which wavelength conversion is performed; and a sensor that detects an anomaly in the fluorescent unit. In addition, when seen along an optical axis of the primary light emitted by the plurality of excitation light sources, the sensor circumscribes, among the plurality of excitation light sources, a first excitation light source and a second excitation light source different from the first excitation light source, and is disposed inside an imaginary circle having, as a diameter, a line segment connecting the first excitation light source and the second excitation light source.
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公开(公告)号：US20210091539A1
公开(公告)日：2021-03-25
申请号：US16630395
申请日：2018-06-20
Inventor： Takeshi ABE , Shozo OSHIO
Abstract: A light emitting device includes: a solid-state light emitting element that radiates blue-series laser light; and a wavelength converter 100 that absorbs the laser light and performs wavelength conversion of the absorbed laser light into light with a longer wavelength than a wavelength of the laser light. The wavelength converter includes: a silicate phosphor 1 containing Lu2CaMg2(SiO4)3:Ce3+ as a main component; and an aluminate phosphor 2 containing Lu3(Al1-xGax)2(AlO4)3:Ce3+ (where x is a numeric value that satisfies 0
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公开(公告)号：US20210048168A1
公开(公告)日：2021-02-18
申请号：US17047220
申请日：2019-04-10
Inventor： Tatsuya OKUNO , Takeshi ABE , Shozo OSHIO
Abstract: Alight emitting device (A) includes a laser light source (1) that emits laser light (100), a housing (2A) that includes a bottom wall (3) and a side wall, and a first wavelength converter (20) provided on the side wall, the first wavelength converter (20) containing a first phosphor. The bottom wall of the housing is irradiated with the laser light emitted from the laser light source, and the first phosphor is excited by diffused light of the laser light diffused by the bottom wall. With such a configuration, the light emitting device (A) improves color uniformity and chromaticity flexibility while increasing power density of output light.
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