Patents by Inventor Shozo Oshio

Shozo Oshio 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).

  • Publication number: 20190280166
    Abstract: A light emitting device 1 includes: a substrate 30; and a phosphor layer 40 composed in such a manner that a large number of phosphor particles 60 are adhered onto a flat surface 32 of the substrate 30. At least one of the phosphor particles 60 is a polyhedral phosphor particle 65 that is monodispersed, is derived from a crystal structure of garnet and has facets, and a median particle size D50 of the polyhedral phosphor particle 65 is 30 ?m or more and a maximum thickness of the phosphor layer 40 or less. It is preferable that at least one of the phosphor particles 60 adhered onto the flat surface 32 of the substrate 30 is the polyhedral phosphor particle 65 that is monodispersed, is derived from the crystal structure of the garnet, and has the facets.
    Type: Application
    Filed: May 30, 2019
    Publication date: September 12, 2019
    Inventors: Youshin LEE, Shozo OSHIO, Tatsuya OKUNO, Takeshi ABE, Masahiro NAKAMURA
  • Patent number: 10378701
    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.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: August 13, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takeshi Abe, Shozo Oshio, Hiroshi Asano, Yosuke Honda
  • Patent number: 10364963
    Abstract: A light-emitting device 1 according to the present invention includes: a solid-state light-emitting element 10 that radiates laser light; and a wavelength converter 50 including plural types of phosphors which receive the laser light and radiate light. The phosphors included in the wavelength converter 50 are substantially composed of Ce3+-activated phosphors. The above-described light-emitting device includes at least a warm-color Ce3+-activated phosphor that receives the laser light and radiates light having a light emission peak within a wavelength range of 580 nm or more to less than 660 nm, and light-emitting components radiated by the phosphors are composed of only light-emitting components derived from Ce3+.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: July 30, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Shozo Oshio, Shinji Shibamoto
  • Patent number: 10355175
    Abstract: A light emitting device 1 includes: a substrate 30; and a phosphor layer 40 composed in such a manner that a large number of phosphor particles 60 are adhered onto a flat surface 32 of the substrate 30. At least one of the phosphor particles 60 is a polyhedral phosphor particle 65 that is monodispersed, is derived from a crystal structure of garnet and has facets, and a median particle size D50 of the polyhedral phosphor particle 65 is 30 ?m or more and a maximum thickness of the phosphor layer 40 or less. It is preferable that at least one of the phosphor particles 60 adhered onto the flat surface 32 of the substrate 30 is the polyhedral phosphor particle 65 that is monodispersed, is derived from the crystal structure of the garnet, and has the facets.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: July 16, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Youshin Lee, Shozo Oshio, Tatsuya Okuno, Takeshi Abe, Masahiro Nakamura
  • Publication number: 20190194538
    Abstract: A phosphor is a phosphor composed by containing Ce3+ as an emission center in a matrix garnet compound having a garnet structure. Then, in the matrix garnet compound, a part of Ca that composes a crystal of Lu2CaMg2(SiO4)3 is replaced by Mg. Moreover, a light emitting device includes the above-mentioned phosphor. In this way, it is possible to provide a garnet phosphor in which temperature quenching is reduced without largely shifting the light emission peak wavelength from that of a Lu2CaMg2(SiO4)3:Ce3+ phosphor, and to provide a light emitting device using the garnet phosphor.
    Type: Application
    Filed: July 25, 2017
    Publication date: June 27, 2019
    Inventors: Takeshi ABE, Shozo OSHIO
  • Publication number: 20190035983
    Abstract: A phosphor composed by containing Ce3+ as a light emission center in a matrix garnet compound having a garnet structure. The matrix garnet compound is a solid solution composed of two or more end members, and the end members include Lu2CaMg2(SiO4)3 as a first end member. It is preferable that the matrix garnet compound is a compound containing Al. A light emitting device uses the phosphor 2 and includes a solid-state light emitting device 117. The phosphor 2 is excited by light radiated by the solid-state light emitting device 117.
    Type: Application
    Filed: March 6, 2017
    Publication date: January 31, 2019
    Applicant: Panasonic Intellectual Property Management Co. Ltd.
    Inventors: Takeshi ABE, Shozo OSHIO
  • Publication number: 20190027656
    Abstract: A light emitting device 1 includes: a substrate 30; and a phosphor layer 40 composed in such a manner that a large number of phosphor particles 60 are adhered onto a flat surface 32 of the substrate 30. At least one of the phosphor particles 60 is a polyhedral phosphor particle 65 that is monodispersed, is derived from a crystal structure of garnet and has facets, and a median particle size D50 of the polyhedral phosphor particle 65 is 30 ?m or more and a maximum thickness of the phosphor layer 40 or less. It is preferable that at least one of the phosphor particles 60 adhered onto the flat surface 32 of the substrate 30 is the polyhedral phosphor particle 65 that is monodispersed, is derived from the crystal structure of the garnet, and has the facets.
    Type: Application
    Filed: January 31, 2017
    Publication date: January 24, 2019
    Inventors: Youshin LEE, Shozo OSHIO, Tatsuya OKUNO, Takeshi ABE, Masahiro NAKAMURA
  • Publication number: 20180306410
    Abstract: A light-emitting device includes a radiation source that radiates laser light as first primary light, and a first wavelength converter, and emits output light. The first wavelength converter has an incidence face on which the first primary light is incident, and an emission face through which the output light emits. A normal to the incidence face and a normal to the emission face are mutually different. A first phosphor included in the first wavelength converter is a single crystal phosphor.
    Type: Application
    Filed: November 21, 2016
    Publication date: October 25, 2018
    Inventors: Takeshi ABE, Shozo OSHIO
  • Publication number: 20180274737
    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.
    Type: Application
    Filed: October 26, 2016
    Publication date: September 27, 2018
    Inventors: Takeshi ABE, Shozo OSHIO, Hiroshi ASANO, Yosuke HONDA
  • Publication number: 20180163127
    Abstract: A garnet compound includes a single particle or an aggregation of single particles, each single particle having a particle shape derived from a crystal structure of garnet. The garnet compound has a composition represented by a general formula: A?3B?2(C?X4)3??(1) (where A?, B?, and C? are cations forming the garnet compound, and X is an anion forming the garnet compound), neither B? nor C? containing iron as a main component. The single particle in the garnet compound has a particle size categorized as sand in geology. The garnet compound contains lead in an amount of 1000 ppm or less.
    Type: Application
    Filed: July 15, 2016
    Publication date: June 14, 2018
    Inventors: Shozo OSHIO, Takeshi ABE
  • Patent number: 9976080
    Abstract: An inorganic oxide has a composition represented by General formula: M2LnX2(AlO4)3 (where M includes Ca, Ln includes Eu, and X includes at least either one of Zr and Hf). Then, a crystal structure of the inorganic oxide is a garnet-type structure. Eu3+ in the inorganic oxide emits a plurality of bright line-like fluorescent components, and a principal bright line of the fluorescent component is present within a wavelength range of 600 nm or more to less than 628 nm. Moreover, a maximum height of the bright line present within a wavelength range of 700 nm or more to less than 720 nm is less than 60% of a maximum height of the principal bright line. A phosphor composed of the inorganic oxide can emit narrowband red light with good color purity.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: May 22, 2018
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Shozo Oshio, Natsuki Sato
  • Publication number: 20180016496
    Abstract: A phosphor of the present invention has a crystal structure in which at least one of Ce3+ and Eu2+ is substituted for a part of a host crystal that contains at least one of an alkaline earth metal element and a rare earth element and does not contain an alkaline metal element. In the phosphor, a light emission spectrum measured at room temperature has a light emission peak, which is derived from at least one of Ce3+ and Eu2+, within a wavelength range of 440 nm or more to less than 1200 m, the light emission peak indicates a maximum intensity value of the light emission spectrum, and a refractive index is 1.41 or more to less than 1.57.
    Type: Application
    Filed: February 3, 2016
    Publication date: January 18, 2018
    Inventors: Natsuki SATO, Yoshimitsu IKOMA, Shozo OSHIO
  • Patent number: 9840666
    Abstract: The phosphor has a broad excitation band provided by Ce3+ in an excitation spectrum. The excitation band has a peak in a range between 400 nm and 470 nm inclusive. The phosphor has, as an emission spectrum, a broad emission component provided by Ce3+ which has an emission peak wavelength of 510 nm or more to less than 570 nm and a linear emission component provided by Tb3+ which has an emission peak wavelength of 535 nm or more to less than 560 nm. The intensity of the emission spectrum shows the maximum at the wavelength of the linear emission component provided by Tb3+.
    Type: Grant
    Filed: August 18, 2014
    Date of Patent: December 12, 2017
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Natsuki Sato, Shozo Oshio
  • Publication number: 20170343188
    Abstract: A light-emitting device 1 according to the present invention includes: a solid-state light-emitting element 10 that radiates laser light; and a wavelength converter 50 including plural types of phosphors which receive the laser light and radiate light. The phosphors included in the wavelength converter 50 are substantially composed of Ce3+-activated phosphors. The above-described light-emitting device includes at least a warm-color Ce3+-activated phosphor that receives the laser light and radiates light having a light emission peak within a wavelength range of 580 nm or more to less than 660 nm, and light-emitting components radiated by the phosphors are composed of only light-emitting components derived from Ce3+.
    Type: Application
    Filed: November 11, 2015
    Publication date: November 30, 2017
    Inventors: Shozo OSHIO, Shinji SHIBAMOTO
  • Patent number: 9732271
    Abstract: An inorganic oxide of the present invention has a composition represented by General formula (1): M2LnX2(AlO4)3 (where M includes Ca, Ln includes Tb, and X includes at least either one of Zr and Hf). Then, a number of Tb atoms in General formula (1) is 0.1 or more to 1 or less. Moreover, a crystal structure of the inorganic oxide is a garnet structure. A phosphor made of this inorganic oxide is capable of being excited by short-wavelength visible light, and can radiate narrow-band green light.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: August 15, 2017
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Shozo Oshio, Natsuki Sato
  • Patent number: 9670407
    Abstract: Provided is a rare earth phosphovanadate phosphor that is excellent in emission characteristics and preferred also from the viewpoint of industrial production, and a production method thereof. The rare earth phosphovanadate phosphor includes at least a primary particle in which a linear uneven pattern including a plurality of ridge lines parallel to each other is formed on the surface of the particle. Further, the method for producing a rare earth phosphovanadate phosphor involves generating a mixture of a rare earth phosphovanadate phosphor and an alkali metal vanadate, and removing the alkali metal vanadate.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: June 6, 2017
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Shozo Oshio
  • Publication number: 20170145306
    Abstract: A method of manufacturing a surface-treated phosphor (11) in which the surface of an alkaline-earth silicate phosphor (12) containing a silicate of alkaline-earth metal is covered with a surface treatment layer (13), the method comprising: surface treatment which brings the alkaline-earth silicate phosphor (12) into contact with the surface treatment substance (23) molten or pyrolyzed to form the surface treatment layer (13) on the surface of the alkaline-earth silicate phosphor (12) wherein the surface treatment substance (23) is at least one selected from a group consisting of a sulfate, a phosphate, a carbonate, a borate, a boric acid, a titanate, and a fluoride.
    Type: Application
    Filed: June 18, 2015
    Publication date: May 25, 2017
    Inventors: Shinji SHIBAMOTO, Shozo OSHIO, Keiichi YAMAZAKI, Emi MIYAZAKI, Di WEN
  • Publication number: 20170130125
    Abstract: A method of manufacturing a surface-treated phosphor (11) in which the surface of an alkaline-earth silicate phosphor (12) containing a silicate of alkaline-earth metal is covered with a surface treatment layer (13), the method comprising: surface treatment which brings the alkaline-earth silicate phosphor (12) and a surface treatment substance into contact in the presence of at least a kind of polyol selected from the group of diols and triols to form the surface treatment layer (13) on the surface of the alkaline-earth silicate phosphor (12), the surface treatment substance being at least one selected from the group consisting of a sulfate, a phosphate, a carbonate, a borate, a boric acid, a titanate, and a fluoride.
    Type: Application
    Filed: June 29, 2015
    Publication date: May 11, 2017
    Inventors: Shinji SHIBAMOTO, Shozo OSHIO, Keiichi YAMAZAKI, Emi MIYAZAKI, Di WEN
  • Publication number: 20160230086
    Abstract: The phosphor has a broad excitation band provided by Ce3+ in an excitation spectrum. The excitation band has a peak in a range between 400 nm and 470 nm inclusive. The phosphor has, as an emission spectrum, a broad emission component provided by Ce3+ which has an emission peak wavelength of 510 nm or more to less than 570 nm and a linear emission component provided by Tb3+ which has an emission peak wavelength of 535 nm or more to less than 560 nm. The intensity of the emission spectrum shows the maximum at the wavelength of the linear emission component provided by Tb3+.
    Type: Application
    Filed: August 18, 2014
    Publication date: August 11, 2016
    Inventors: NATSUKI SATO, SHOZO OSHIO
  • Patent number: RE47453
    Abstract: A chip-type light-emitting semiconductor device includes: a substrate 4; a blue LED 1 mounted on the substrate 4; and a luminescent layer 3 made of a mixture of yellow/yellowish phosphor particles 2 and a base material 13 (translucent resin). The yellow/yellowish phosphor particles 2 is a silicate phosphor which absorbs blue light emitted by the blue LED 1 to emit a fluorescence having a main emission peak in the wavelength range from 550 nm to 600 nm, inclusive, and which contains, as a main component, a compound expressed by the chemical formula: (Sr1-a1-b1-xBaa1Cab1Eux)2SiO4 (0?a1?0.3, 0?b1?0.8 and 0<x<1). The silicate phosphor particles disperse substantially evenly in the resin easily. As a result, excellent white light is obtained.
    Type: Grant
    Filed: July 5, 2016
    Date of Patent: June 25, 2019
    Assignee: Panasonic Corporation
    Inventors: Toshihide Maeda, Shozo Oshio, Katsuaki Iwama, Hiromi Kitahara, Tadaaki Ikeda, Kei Sakanoue, Hidenori Kamei, Yasuyuki Hanada