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公开(公告)号：US20240269968A1
公开(公告)日：2024-08-15
申请号：US18017784
申请日：2021-07-09
Applicant: DENKA COMPANY LIMITED
Inventor： Shunsuke MITANI , Keita KOBAYASHI
CPC classification number: B32B27/08 , B32B37/10 , B32B38/0036 , C09K11/025 , C09K11/64 , B32B2038/0076 , B32B2307/422 , B32B2307/7376 , B32B2309/025 , G03B21/204
Abstract: Phosphor particles for producing a wavelength conversion member of a projector, including CASN, and/or SCASN. A cured sheet having a film thickness of 50±5 μm produced by using the particle satisfies the following optical characteristics: when an intensity at a peak wavelength of blue light emitted from a blue LED having a peak wavelength between 450 to 460 nm is defined as Ii [W/nm], and where the blue light is emitted to one surface side of the cured sheet, when an intensity of light emitted from the other surface side of the cured sheet at a peak wavelength between 450 to 460 nm is defined as It [W/nm] and an intensity thereof at a peak wavelength between 600 to 650 nm is defined as Ip [W/nm], It/Ii is equal to or less than 0.2 and Ip/Ii is equal to or more than 0.05.
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公开(公告)号：US20240026221A1
公开(公告)日：2024-01-25
申请号：US18024932
申请日：2021-09-06
Applicant: Denka Company Limited
Inventor： Noriyoshi SAKAI , Ryousuke KONDO , Tomohiro NOMIYAMA , Keita KOBAYASHI
CPC classification number: C09K11/7728 , C09K11/641
Abstract: An europium activating β-type sialon phosphor contains at least one kind of element selected from the group made of yttrium, titanium, and gadolinium, wherein the total content of the at least one kind of element is more than 0 ppm and less than 1000 ppm.
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公开(公告)号：US20230279289A1
公开(公告)日：2023-09-07
申请号：US18017807
申请日：2021-07-09
Applicant: DENKA COMPANY LIMITED
Inventor： Shunsuke MITANI , Keita KOBAYASHI
CPC classification number: C09K11/02 , C09K11/77348 , C08J3/212 , C08J5/18 , C08K3/34 , C08J2383/04 , C08K2201/005
Abstract: Phosphor particles for producing a wavelength conversion member of a projector, including β-type sialon. A cured sheet having a film thickness of 50±5 μm produced by using the particle satisfies the following optical characteristics: when an intensity at a peak wavelength of blue light emitted from a blue LED having a peak wavelength between 450 to 460 nm is defined as Ii [W/nm], and in a case where the blue light is emitted to one surface side of the cured sheet, when an intensity of light emitted from the other surface side of the cured sheet at a peak wavelength between 450 to 460 nm is defined as It [W/nm] and an intensity thereof at a peak wavelength between 500 to 560 nm is defined as Ip [W/nm], It/Ii is equal to or less than 0.50 and Ip/Ii is equal to or more than 0.03.
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Patent Agency Ranking
公开(公告)号：US20190062631A1
公开(公告)日：2019-02-28
申请号：US16070222
申请日：2017-01-13
Applicant: Denka Company Limited
Inventor： Keita KOBAYASHI , Hideyuki EMOTO
Abstract: Provided are a phosphor having long-term reliability and high luminance, and a white light emitting device using the phosphor. In a β-type SiAlON phosphor (a), the volume median particle size D50 [μm] and the average particle size R [μm] calculated from a surface area measured by an air permeability method satisfy the following formula (1): D50/R
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公开(公告)号：US20240002719A1
公开(公告)日：2024-01-04
申请号：US18039684
申请日：2021-11-04
Applicant: DENKA COMPANY LIMITED
Inventor： Shunsuke MITANI , Keita KOBAYASHI
CPC classification number: C09K11/64 , C09K11/59 , C09K11/55 , C09K11/0883 , H01L33/50 , C09K2211/10
Abstract: Phosphor particles are composed of one or two selected from a powdery phosphor formed of CASN and SCASN, wherein a particle size corresponding to a cumulative 50% is Dx50 and to a cumulative 90% is Dx90 in a volume-based integrated fraction of the phosphor particles, and where a particle size corresponding to a cumulative 50% is Dy50 and to a cumulative 90% is Dy90 after subjecting the particles to treatment, (a) Dx50 is between 0.5 μm and 35 μm, and (b) Dx90/Dy90 is between 0.7 and 15. The treatment; a dispersion liquid wherein 30 mg of the particles are uniformly dispersed in an aqueous solution of sodium hexametaphosphate having a concentration of 0.2% and put into a cylindrical container A vibrator part of an ultrasonic homogenizer is inserted and the liquid is irradiated with ultrasonic waves at a frequency of 19.5 kHz and an output of 150 W for 3 minutes.
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公开(公告)号：US20220010205A1
公开(公告)日：2022-01-13
申请号：US17294721
申请日：2019-11-07
Applicant: DENKA COMPANY LIMITED
Inventor： Manabu KOBAYASHI , Keita KOBAYASHI , Tomohiro NOMIYAMA , Shintaro WATANABE
Abstract: A β-sialon phosphor that is a solid solution of europium, in which D50 is 7.0 μm or more and 20.0 μm or less and (D50−D10)/D50 is 0.60 or less, where D50 is a 50% area diameter of primary particles of the β-sialon phosphor, and D10 is a 10% area diameter of the primary particles of the β-sialon phosphor. Primary particles are defined as single-crystal particles distinguished for each crystal orientation by identifying the crystal orientation of individual particles of the β-sialon phosphor by an electron backscatter diffraction image method. D50 and D10 are obtained by image analysis of the cross-sectional area of the primary particles.
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公开(公告)号：US20210324267A1
公开(公告)日：2021-10-21
申请号：US17272878
申请日：2019-08-22
Applicant: DENKA COMPANY LIMITED
Inventor： Kazuya SUGITA , Yusuke TAKEDA , Keita KOBAYASHI , Akihisa KAJIYAMA
Abstract: A phosphor which has a main crystal phase having the same crystal structure as that of CaAlSiN3, wherein the phosphor satisfies conditions of a span value (d90−d10)/d50 of 1.70 or less and a d50 of 10.0 μm or less, as represented with d10, d50, and d90 on a volume frequency measured according to a laser diffraction method; wherein the d10, d50, and d90 on a volume frequency in a particle distribution measured are each a measured by loading 0.5 g of a phosphor into 100 ml of a solution of 0.05% by weight of sodium hexametaphosphate mixed in ion exchange water, and subjecting the resultant to a dispersing treatment for 3 minutes with an ultrasonic homogenizer at an oscillation frequency of 19.5±1 kHz, a chip size of 20φ, and an amplitude of vibration of 32±2 μm, with a chip placed at a central portion.
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公开(公告)号：US20210189234A1
公开(公告)日：2021-06-24
申请号：US17272827
申请日：2019-08-22
Applicant: DENKA COMPANY LIMITED
Inventor： Keita KOBAYASHI , Shunsuke MITANI , Ryousuke KONDO , Kazuya SUGITA , Takuya MATSUFUJI , Akihisa KAJIYAMA
Abstract: A β-type sialon phosphor represented by the following expression 1, in which D50 is 10 μm or less, and values of D10, D50, and D90 satisfy a relationship of the following expression 2 with respect to D10, D50, and D90 (each unit is [μm]) on a volume frequency basis as measured according to a laser diffraction/scattering method. Expression 1: Si12-aAlaObN16-b:Eux (wherein 0
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