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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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12.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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13.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：US20240347677A1
公开(公告)日：2024-10-17
申请号：US18292043
申请日：2022-06-27
Inventor： Ryosuke SHIGITANI , Mitsuru NITTA , Shozo OSHIO
IPC: H01L33/50
CPC classification number: H01L33/502 , H01L33/507
Abstract: Provided is a light emitting device including a solid-state light-emitting element that emits primary light, a wavelength converter that includes a phosphor containing a fluorescent ion which absorbs the primary light on the basis of a forbidden transition-type electronic energy transition, and an optical member that reflects the primary light while transmitting fluorescence emitted by the fluorescent ion. The solid-state light-emitting element is arranged on a side of one surface of the wavelength converter and the optical member is arranged on a side of the other surface. The fluorescence emitted by the fluorescent ion passes through the optical member and is output to the outside of the light emitting device. An electronic apparatus includes the above-described light emitting device.
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Patent Agency Ranking
公开(公告)号：US20240304765A1
公开(公告)日：2024-09-12
申请号：US18276025
申请日：2022-02-14
Inventor： Ryosuke SHIGITANI , Mitsuru NITTA , Shozo OSHIO
IPC: H01L33/50
CPC classification number: H01L33/504 , H01L33/507
Abstract: Provided is a light emitting device that is characterized by at least combining a solid-state light emitting element, a first wavelength converter, and a second wavelength converter, and emits output light. The solid-state light emitting element emits primary light. The first wavelength converter absorbs at least part of the primary light and converts this part of the primary light to first wavelength-converted light. The second wavelength converter absorbs at least part of first mixed light including first transmitted primary light, which is the primary light that has passed through the first wavelength converter, and the first wavelength-converted light, and converts the light to second wavelength-converted light. The output light includes at least transmitted first wavelength-converted light, which is a light component obtained by the first wavelength-converted light having passed through the second wavelength converter, and a light component of the second wavelength-converted light.
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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：US20240118220A1
公开(公告)日：2024-04-11
申请号：US18275945
申请日：2022-02-01
Inventor： Shozo OSHIO , Mitsuru NITTA , Ryosuke SHIGITANI
IPC: G01N21/94 , G01N21/359 , G01N21/64 , G01N21/88 , G01N33/02
CPC classification number: G01N21/94 , G01N21/359 , G01N21/64 , G01N21/8806 , G01N33/02 , G01N2021/3181
Abstract: Provided is an inspection device including: a light source including a phosphor; and a photodetector, and detecting, using the photodetector, reflected light of the inspection light reflected by the inspection object. A spectral distribution of the inspection light has at least one maximum value derived from fluorescence emitted by the phosphor, and the maximum value is within a wavelength range of 600 nm or more and 750 nm or less. When Pmax is set as a spectral intensity at the maximum value where the spectral intensity is largest at the at least one maximum value, a largest value of the spectral intensity in a wavelength range longer than 750 nm is 20% or more of Pmax and less than Pmax, and the spectral intensity within a wavelength range of 500 nm or more and 550 nm or less is less than 20% of Pmax.
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19.发明公开公开(公告)号：US20230160558A1
公开(公告)日：2023-05-25
申请号：US17919999
申请日：2021-04-19
Inventor： Mitsuru NITTA , Shozo OSHIO , Chigusa FUJIWARA
IPC: F21V9/38
CPC classification number: F21V9/38 , A61B2090/304
Abstract: Provided is a wavelength converting composite member including: a disk-shaped substrate; a first wavelength converting member provided on the substrate and containing a first phosphor that radiates fluorescence due to a parity-forbidden transition; and a second wavelength converting member provided on the substrate and containing a second phosphor that radiates fluorescence due to a parity-allowed transition. The first wavelength converting member and the second wavelength converting member are disposed adjacent to each other along the circumferential direction of the substrate. The first wavelength converting member and the second wavelength converting member are provided on the substrate in such a way that the position of the center of gravity of the entirety of the first wavelength converting member and the second wavelength converting member is located on the rotation axis of the substrate. A light emitting device is provided with the wavelength converting composite member.
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公开(公告)号：US20220033708A1
公开(公告)日：2022-02-03
申请号：US17278764
申请日：2019-09-19
Inventor： Mitsuru NITTA , Shozo OSHIO
Abstract: Awarm-color complex phosphor includes: a Ce3+-activated orange phosphor that has an excitation peak within a blue wavelength range of 440 nm or more and less than 480 nm and has a fluorescence peak within an orange wavelength range of 580 nm or more and less than 610 nm; and a Ce3+-activated red phosphor that has an excitation peak within a green wavelength range of 500 nm or more and less than 550 nm and has a fluorescence peak within a red wavelength range of 610 nm or more and less than 660 nm. Preferably, the Ce3+-activated red phosphor is a nitride-based compound.
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