Patents by Inventor Kumpei KOBAYASHI
Kumpei KOBAYASHI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240044459Abstract: Provided are a method for using a white light source, and a white light source, wherein precise control of daily rhythm and pleasant lighting can be safely and easily realized in a place of living such as a general home. An embodiment provides a method for using a white light source.Type: ApplicationFiled: September 4, 2023Publication date: February 8, 2024Inventors: Masahiko YAMAKAWA, Kumpei KOBAYASHI, Ryoji TSUDA, Noriaki YAGI, Kiyoshi INOUE, Kyung Hee YE
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Publication number: 20230343758Abstract: A light emitting device including a substrate, a first light emitter to emit light having a first color temperature, and a second light emitter to emit light having a second color temperature, in which the first light emitter has a first converter including first phosphors and a first resin, each first phosphor having different half-value widths, the second light emitter has a second converter including second phosphors and a second resin, each second phosphor having different peak wavelengths, at least one phosphor of the first converter has a half-value width of 33 nm to 110 nm, a distance between peak wavelengths of at least two phosphors of the second converter is 150 nm or less, and at least one phosphor of the first converter has a particle size of 5 um to 50 um.Type: ApplicationFiled: June 29, 2023Publication date: October 26, 2023Inventors: Masahiko YAMAKAWA, Noriaki YAGI, Kumpei KOBAYASHI
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Patent number: 11721675Abstract: A light emitting device including a substrate, a first light emitter to emit light having a first color temperature, and a second light emitter to emit light having a second color temperature, in which the first light emitter has a first converter including first phosphors and a first resin, each first phosphor having different half-value widths, the second light emitter has a second converter including second phosphors and a second resin, each second phosphor having different peak wavelengths, at least one phosphor of the first converter has a half-value width of 33 nm to 110 nm, a distance between peak wavelengths of at least two phosphors of the second converter is 150 nm or less, at least one phosphor of the first converter has a particle size of 5 um to 50 um, and a thickness of the second converter is in 0.07 mm to 1.5 mm.Type: GrantFiled: August 29, 2022Date of Patent: August 8, 2023Assignee: Seoul Semiconductor Co., Ltd.Inventors: Masahiko Yamakawa, Noriaki Yagi, Kumpei Kobayashi
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Publication number: 20230005889Abstract: A light emitting device including a substrate, a first light emitter to emit light having a first color temperature, and a second light emitter to emit light having a second color temperature, in which the first light emitter has a first converter including first phosphors and a first resin, each first phosphor having different half-value widths, the second light emitter has a second converter including second phosphors and a second resin, each second phosphor having different peak wavelengths, at least one phosphor of the first converter has a half-value width of 33 nm to 110 nm, a distance between peak wavelengths of at least two phosphors of the second converter is 150 nm or less, at least one phosphor of the first converter has a particle size of 5 um to 50 um, and a thickness of the second converter is in 0.07 mm to 1.5 mm.Type: ApplicationFiled: August 29, 2022Publication date: January 5, 2023Inventors: Masahiko YAMAKAWA, Noriaki YAGI, Kumpei KOBAYASHI
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Patent number: 11430771Abstract: According to one embodiment, there is provided a white light source system. P(?), B(?) and V(?) satisfy an equation (1) below in a wavelength range of 380 nm to 780 nm. The white light source system satisfies an expression (2) below in a wavelength range of 400 nm to 495 nm: ? 380 780 ? P ? ( ? ) ? V ? ( ? ) ? d ? ? ? = ? 380 780 ? B ? ( ? ) ? V ? ( ? ) ? d ? ? ? ( 1 ) where P(?) is a light emission spectrum of white light, B(?) is a light emission spectrum of blackbody radiation of a color temperature correspond to a color temperature of the white light, and V(?) is a spectrum of a spectral luminous efficiency.Type: GrantFiled: April 19, 2021Date of Patent: August 30, 2022Assignee: SEOUL SEMICONDUCTOR CO., LTD.Inventors: Masahiko Yamakawa, Noriaki Yagi, Kumpei Kobayashi
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Patent number: 11094679Abstract: According to one embodiment, there is provided a white light source system. P(?), B(?) and V(?) satisfy an equation (1) below in a wavelength range of 380 nm to 780 nm. The white light source system satisfies an expression (2) below in a wavelength range of 400 nm to 495 nm: ?380780P(?)V(?)d?=?380780B(?)V(?)d???(1) where P(?) is a light emission spectrum of white light, B(?) is a light emission spectrum of blackbody radiation of a color temperature correspond to a color temperature of the white light, and V(?) is a spectrum of a spectral luminous efficiency.Type: GrantFiled: April 21, 2020Date of Patent: August 17, 2021Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.Inventors: Masahiko Yamakawa, Noriaki Yagi, Kumpei Kobayashi
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Publication number: 20210242182Abstract: According to one embodiment, there is provided a white light source system. P(?), B(?) and V(?) satisfy an equation (1) below in a wavelength range of 380 nm to 780 nm. The white light source system satisfies an expression (2) below in a wavelength range of 400 nm to 495 nm: ? 380 780 ? P ? ( ? ) ? V ? ( ? ) ? d ? ? ? = ? 380 780 ? B ? ( ? ) ? V ? ( ? ) ? d ? ? ? ( 1 ) where P(?) is a light emission spectrum of white light, B(?) is a light emission spectrum of blackbody radiation of a color temperature correspond to a color temperature of the white light, and V(?) is a spectrum of a spectral luminous efficiency.Type: ApplicationFiled: April 19, 2021Publication date: August 5, 2021Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.Inventors: Masahiko YAMAKAWA, Noriaki YAGI, Kumpei KOBAYASHI
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Publication number: 20200253011Abstract: According to one embodiment, there is provided a white light source system. P(?), B(?) and V(?) satisfy an equation (1) below in a wavelength range of 380 nm to 780 nm. The white light source system satisfies an expression (2) below in a wavelength range of 400 nm to 495 nm: ?380780P(?)V(?)d?=?380780B(?)V(?)d???(1) where P(?) is a light emission spectrum of white light, B(?) is a light emission spectrum of blackbody radiation of a color temperature correspond to a color temperature of the white light, and V(?) is a spectrum of a spectral luminous efficiency.Type: ApplicationFiled: April 21, 2020Publication date: August 6, 2020Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.Inventors: Masahiko YAMAKAWA, Noriaki YAGI, Kumpei KOBAYASHI
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Patent number: 10674577Abstract: According to one embodiment, there is provided a white light source system. P(?), B(?) and V(?) satisfy an equation (1) below in a wavelength range of 380 nm to 780 nm. The white light source system satisfies an expression (2) below in a wavelength range of 400 nm to 495 nm: ?380780P(?)V(?)d?=?380780B(?)V(?)d???(1) P(?)/B(?)?1.8.??(2) where P(?) is a light emission spectrum of white light, B(?) is a light emission spectrum of blackbody radiation of a color temperature correspond to a color temperature of the white light, and V(?) is a spectrum of a spectral luminous efficiency.Type: GrantFiled: June 18, 2019Date of Patent: June 2, 2020Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.Inventors: Masahiko Yamakawa, Noriaki Yagi, Kumpei Kobayashi
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Publication number: 20190306946Abstract: According to one embodiment, there is provided a white light source system. P(?), B(?) and V(?) satisfy an equation (1) below in a wavelength range of 380 nm to 780 nm. The white light source system satisfies an expression (2) below in a wavelength range of 400 nm to 495 nm: ?380780P(?)V(?)d ?=?380780B(?)V(?)d???(1) P(?)/B(?)?1.8. ??(2) where P(?) is a light emission spectrum of white light, B(?) is a light emission spectrum of blackbody radiation of a color temperature correspond to a color temperature of the white light, and V(?) is a spectrum of a spectral luminous efficiency.Type: ApplicationFiled: June 18, 2019Publication date: October 3, 2019Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.Inventors: Masahiko YAMAKAWA, Noriaki YAGI, Kumpei KOBAYASHI
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Patent number: 10420183Abstract: There is provided a white light source approximating sunlight and being capable of reproducing a subtle difference in sunlight which changes depending on times and locations, and provided a white light source system of a lighting system or the like. The white light source includes a light source unit. Light which is emitted from the light source unit is a chromaticity point on a CIE chromaticity diagram and has a correlated color temperature corresponding to a chromaticity point including a deviation of ?0.005 or more to +0.005 or less with respect to a black body radiation locus, and satisfies a formula: ?0.2?[(P (?)×V (?))/(P (?max1)×V (?max1))?(B (?)×V (?))/(B (?max2)×V (?max2))]?+0.2.Type: GrantFiled: April 21, 2017Date of Patent: September 17, 2019Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.Inventors: Masahiko Yamakawa, Noriaki Yagi, Kumpei Kobayashi
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Patent number: 10375786Abstract: According to one embodiment, there is provided a white light source system. P(?), B(?) and V(?) satisfy an equation (1) below in a wavelength range of 380 nm to 780 nm. The white light source system satisfies an expression (2) below in a wavelength range of 400 nm to 495 nm: ? 380 780 ? P ? ( ? ) ? V ? ( ? ) ? d ? ? ? = ? 380 780 ? B ? ( ? ) ? V ? ( ? ) ? d ? ? ? ( 1 ) P ? ( ? ) / B ? ( ? ) ? 1.8 . ( 2 ) where P(?) is a light emission spectrum of white light, B(?) is a light emission spectrum of blackbody radiation of a color temperature correspond to a color temperature of the white light, and V(?) is a spectrum of a spectral luminous efficiency.Type: GrantFiled: January 18, 2019Date of Patent: August 6, 2019Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.Inventors: Masahiko Yamakawa, Noriaki Yagi, Kumpei Kobayashi
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Publication number: 20190159313Abstract: According to one embodiment, there is provided a white light source system. P(A), B(A) and V(A) satisfy an equation (1) below in a wavelength range of 380 nm to 780 nm. The white light source system satisfies an expression (2) below in a wavelength range of 400 nm to 495 nm: ? 380 780 ? P ? ( ? ) ? V ? ( ? ) ? d ? ? ? = ? 380 780 ? B ? ( ? ) ? V ? ( ? ) ? d ? ? ? ( 1 ) P ? ( ? ) / B ? ( ? ) ? 1.8 . ( 2 ) where P(?) is a light emission spectrum of white light, B(?) is a light emission spectrum of blackbody radiation of a color temperature correspond to a color temperature of the white light, and V(?) is a spectrum of a spectral luminous efficiency.Type: ApplicationFiled: January 18, 2019Publication date: May 23, 2019Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.Inventors: Masahiko YAMAKAWA, Noriaki YAGI, Kumpei KOBAYASHI
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Patent number: 10231305Abstract: According to one embodiment, there is provided a white light source system. P(?), B(?) and V(?) satisfy an equation (1) below in a wavelength range of 380 nm to 780 nm. The white light source system satisfies an expression (2) below in a wavelength range of 400 nm to 495 nm: ? 380 780 ? P ? ( ? ) ? V ? ( ? ) ? d ? ? ? = ? 380 780 ? B ? ( ? ) ? V ? ( ? ) ? d ? ? ? ( 1 ) P ? ( ? ) / B ? ( ? ) ? 1.8 . ( 2 ) where P(?) is a light emission spectrum of white light, B(?) is a light emission spectrum of blackbody radiation of a color temperature correspond to a color temperature of the white light, and V(?) is a spectrum of a spectral luminous efficiency.Type: GrantFiled: December 21, 2017Date of Patent: March 12, 2019Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.Inventors: Masahiko Yamakawa, Noriaki Yagi, Kumpei Kobayashi
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Publication number: 20180139817Abstract: According to one embodiment, there is provided a white light source system. P(?), B(?) and V(?) satisfy an equation (1) below in a wavelength range of 380 nm to 780 nm. The white light source system satisfies an expression (2) below in a wavelength range of 400 nm to 495 nm: ? 380 780 ? P ? ( ? ) ? V ? ( ? ) ? d ? ? ? = ? 380 780 ? B ? ( ? ) ? V ? ( ? ) ? d ? ? ? ( 1 ) P ? ( ? ) / B ? ( ? ) ? 1.8 . ( 2 ) where P(?) is a light emission spectrum of white light, B(?) is a light emission spectrum of blackbody radiation of a color temperature correspond to a color temperature of the white light, and V(?) is a spectrum of a spectral luminous efficiency.Type: ApplicationFiled: December 21, 2017Publication date: May 17, 2018Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.Inventors: Masahiko Yamakawa, Noriaki Yagi, Kumpei Kobayashi
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Publication number: 20170238390Abstract: There is provided a white light source approximating sunlight and being capable of reproducing a subtle difference in sunlight which changes depending on times and locations, and provided a white light source system of a lighting system or the like. The white light source includes a light source unit. Light which is emitted from the light source unit is a chromaticity point on a CIE chromaticity diagram and has a correlated color temperature corresponding to a chromaticity point including a deviation of ?0.005 or more to +0.005 or less with respect to a black body radiation locus, and satisfies a formula: ?0.2?[(P (?)×V (?))/(P (?max1)×V (?max1))?(B (?)×V (?))/(B (?max2)×V (?max2))]?+0.2.Type: ApplicationFiled: April 21, 2017Publication date: August 17, 2017Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.Inventors: Masahiko YAMAKAWA, Noriaki YAGI, Kumpei KOBAYASHI