Patents by Inventor Hirofumi OOGURI
Hirofumi OOGURI 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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Patent number: 11319486Abstract: A ceramic complex that has improved optical characteristics including luminous efficiency is provided. A method for producing a ceramic complex, including: preparing a molded body containing rare earth aluminum garnet fluorescent material, aluminum oxide, and lutetium oxide, and having a content of the rare earth aluminum garnet fluorescent material in a range of 15% by mass or more and 50% by mass or less, and a content of the lutetium oxide in a range of 0.2% by mass or more and 4.5% by mass or less, based on the total amount of the rare earth aluminum garnet fluorescent material, the aluminum oxide, and the lutetium oxide; and calcining the molded body in an air atmosphere to provide a ceramic complex having a relative density in a range of 90% or more and less than 100%.Type: GrantFiled: December 5, 2019Date of Patent: May 3, 2022Assignee: NICHIA CORPORATIONInventors: Masaki Kondo, Shozo Taketomi, Takafumi Sumie, Seigo Sunagawa, Hirofumi Ooguri
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Publication number: 20220106523Abstract: Provided are a method for producing a ceramic sintered body having improved light emission intensity, a ceramic sintered body, and a light emitting device. The method for producing a ceramic sintered body comprises preparing a molded body that contains a nitride fluorescent material having a composition containing: at least one alkaline earth metal element M1 selected from the group consisting of Ba, Sr, Ca, and Mg; at least one metal element M2 selected from the group consisting of Eu, Ce, Tb, and Mn; Si; and N, wherein a total molar ratio of the alkaline earth metal element M1 and the metal element M2 in 1 mol of the composition is 2, a molar ratio of the metal element M2 is a product of 2 and a parameter y and wherein y is in a range of 0.001 or more and less than 0.Type: ApplicationFiled: December 13, 2021Publication date: April 7, 2022Applicant: NICHIA CORPORATIONInventors: Hirofumi OOGURI, Shoji HOSOKAWA
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Patent number: 11230666Abstract: Provided are a method for producing a ceramic sintered body having improved light emission intensity, a ceramic sintered body, and a light emitting device. The method for producing a ceramic sintered body comprises preparing a molded body that contains a nitride fluorescent material having a composition containing: at least one alkaline earth metal element M1 selected from the group consisting of Ba, Sr, Ca, and Mg; at least one metal element M2 selected from the group consisting of Eu, Ce, Tb, and Mn; Si; and N, wherein a total molar ratio of the alkaline earth metal element M1 and the metal element M2 in 1 mol of the composition is 2, a molar ratio of the metal element M2 is a product of 2 and a parameter y and wherein y is in a range of 0.001 or more and less than 0.Type: GrantFiled: November 26, 2019Date of Patent: January 25, 2022Assignee: NICHIA CORPORATIONInventors: Hirofumi Ooguri, Shoji Hosokawa
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Patent number: 11149193Abstract: Provided are a method for producing a ceramic composite material that has a high light emission intensity, a ceramic composite material, and a light emitting device. The method for producing a ceramic composite material, includes: preparing a green body containing a nitride fluorescent material having a composition represented by the following chemical formula (I) and aluminum oxide particles mixed with each other; and performing primary sintering the green body at a temperature in a range of 1,250° C. or more and 1,600° C. or less to provide a first sintered body: MwLn1xAyNz??(I) wherein in the chemical formula (I), M represents at least one element selected from the group consisting of Ce and Pr; Ln1 represents at least one element selected from the group consisting of Sc, Y, La, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu; A represents at least one element selected from the group consisting of Si and B; and w, x, y, and z each satisfy 0<w?1.0, 2.5?x?3.5, 5.5?y?6.5, and 10?z?12.Type: GrantFiled: April 4, 2019Date of Patent: October 19, 2021Assignee: NICHIA CORPORATIONInventors: Hirofumi Ooguri, Tomoya Fukui, Tadayoshi Yanagihara, Shigeki Yoshida
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Patent number: 11136502Abstract: Provided are a method of producing a thiogallate-based fluorescent material, a method of producing a light-emitting device, a thiogallate-based fluorescent material, and a light-emitting device. The method of producing a thiogallate-based fluorescent material includes preparing a first solution containing at least one M1 ion selected from the group consisting of Sr, Be, Mg, Ca, Ba and Zn, and at least one M2 ion selected from the group consisting of Eu and Ce, and a second solution containing a sulfite ion, simultaneously supplying the first solution and the second solution to a reactor to obtain a powder containing a sulfite that contains an element M1 and an element M2, mixing a raw material that contains the powder containing the sulfite that contains the element M1 and the element M2 and a powder containing a gallium compound, with lithium chloride to obtain a mixture, and heat-treating the mixture to obtain a thiogallate-based fluorescent material.Type: GrantFiled: November 30, 2017Date of Patent: October 5, 2021Assignee: NICHIA CORPORATIONInventor: Hirofumi Ooguri
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Patent number: 11136501Abstract: A method of producing a thiogallate-based fluorescent material having a large particle diameter and an enhanced luminance, and a sulfite for a thiogallate-based fluorescent material are provided. The method of producing a thiogallate-based fluorescent material includes preparing a first solution containing at least one element M1 selected from the group consisting of strontium, beryllium, magnesium, calcium, barium and zinc, and at least one element M2 selected from the group consisting of europium and cerium, and a second solution containing a sulfite; simultaneously supplying the first solution and the second solution to a reaction vessel and causing a reaction in a reaction system to obtain a powder of a sulfite containing M1 and M2; and obtaining the thiogallate-based fluorescent material from the resulting powder of a sulfite containing M1 and M2.Type: GrantFiled: December 23, 2016Date of Patent: October 5, 2021Assignee: NICHIA CORPORATIONInventor: Hirofumi Ooguri
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Patent number: 10899965Abstract: A fluorescent material particle including: a particle that contains a thiogallate phosphor and a first adherent member containing boron oxide and being disposed on the surface of the particle, a method for producing the fluorescent material particles, and a light emitting device are provided.Type: GrantFiled: March 29, 2016Date of Patent: January 26, 2021Assignee: NICHIA CORPORATIONInventors: Tsunehito Niimi, Koji Kajikawa, Hirofumi Ooguri
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Publication number: 20200181487Abstract: A ceramic complex that has improved optical characteristics including luminous efficiency is provided. A method for producing a ceramic complex, including: preparing a molded body containing rare earth aluminum garnet fluorescent material, aluminum oxide, and lutetium oxide, and having a content of the rare earth aluminum garnet fluorescent material in a range of 15% by mass or more and 50% by mass or less, and a content of the lutetium oxide in a range of 0.2% by mass or more and 4.5% by mass or less, based on the total amount of the rare earth aluminum garnet fluorescent material, the aluminum oxide, and the lutetium oxide; and calcining the molded body in an air atmosphere to provide a ceramic complex having a relative density in a range of 90% or more and less than 100%.Type: ApplicationFiled: December 5, 2019Publication date: June 11, 2020Applicant: NICHIA CORPORATIONInventors: Masaki KONDO, Shozo TAKETOMI, Takafumi SUMIE, Seigo SUNAGAWA, Hirofumi Ooguri
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Publication number: 20200172804Abstract: Provided are a method for producing a ceramic sintered body having improved light emission intensity, a ceramic sintered body, and a light emitting device. The method for producing a ceramic sintered body comprises preparing a molded body that contains a nitride fluorescent material having a composition containing: at least one alkaline earth metal element M1 selected from the group consisting of Ba, Sr, Ca, and Mg; at least one metal element M2 selected from the group consisting of Eu, Ce, Tb, and Mn; Si; and N, wherein a total molar ratio of the alkaline earth metal element M1 and the metal element M2 in 1 mol of the composition is 2, a molar ratio of the metal element M2 is a product of 2 and a parameter y and wherein y is in a range of 0.001 or more and less than 0.Type: ApplicationFiled: November 26, 2019Publication date: June 4, 2020Applicant: NICHIA CORPORATIONInventors: Hirofumi OOGURI, Shoji HOSOKAWA
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Publication number: 20190309221Abstract: Provided are a method for producing a ceramic composite material that has a high light emission intensity, a ceramic composite material, and a light emitting device. The method for producing a ceramic composite material, includes: preparing a green body containing a nitride fluorescent material having a composition represented by the following chemical formula (I) and aluminum oxide particles mixed with each other; and performing primary sintering the green body at a temperature in a range of 1,250° C. or more and 1,600° C. or less to provide a first sintered body: MwLn1xAyNz??(I) wherein in the chemical formula (I), M represents at least one element selected from the group consisting of Ce and Pr; Ln1 represents at least one element selected from the group consisting of Sc, Y, La, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu; A represents at least one element selected from the group consisting of Si and B; and w, x, y, and z each satisfy 0<w?1.0, 2.5?x?3.5, 5.5?y?6.5, and 10?z?12.Type: ApplicationFiled: April 4, 2019Publication date: October 10, 2019Applicant: NICHIA CORPORATIONInventors: Hirofumi OOGURI, Tomoya FUKUI, Tadayoshi YANAGIHARA, Shigeki YOSHIDA
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Publication number: 20180340051Abstract: A method of producing a modified fibrous wollastonite is provided. The method includes hydrothermally treating a fibrous wollastonite.Type: ApplicationFiled: May 24, 2018Publication date: November 29, 2018Applicant: NICHIA CORPORATIONInventors: Hideki YOSHIDA, Hirofumi OOGURI, Yuji AKAZAWA
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Publication number: 20180155619Abstract: Provided are a method of producing a thiogallate-based fluorescent material, a method of producing a light-emitting device, a thiogallate-based fluorescent material, and a light-emitting device. The method of producing a thiogallate-based fluorescent material includes preparing a first solution containing at least one M1 ion selected from the group consisting of Sr, Be, Mg, Ca, Ba and Zn, and at least one M2 ion selected from the group consisting of Eu and Ce, and a second solution containing a sulfite ion, simultaneously supplying the first solution and the second solution to a reactor to obtain a powder containing a sulfite that contains an element M1 and an element M2, mixing a raw material that contains the powder containing the sulfite that contains the element M1 and the element M2 and a powder containing a gallium compound, with lithium chloride to obtain a mixture, and heat-treating the mixture to obtain a thiogallate-based fluorescent material.Type: ApplicationFiled: November 30, 2017Publication date: June 7, 2018Applicant: NICHIA CORPORATIONInventor: Hirofumi OOGURI
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Patent number: 9884989Abstract: To provide Zinc Sulfide activated with Silver (ZnS:Ag) based fluorescent material for detecting particle beams, having lower gamma-ray sensitivity and providing lower afterglow, and being specialized for the purpose of detecting particle beams, and its manufacturing method. Zinc Sulfide activated with Silver (ZnS:Ag) based fluorescent material for detecting particle beams emits fluorescence with wavelengths from 320 nm to 580 nm in response to alpha-ray irradiation, and has a fluorescence spectrum with a peak wavelength from 395 nm to 410 nm.Type: GrantFiled: March 17, 2015Date of Patent: February 6, 2018Assignee: Japan Atomic Energy AgencyInventors: Tatsuya Nakamura, Masaki Katagiri, Yasunobu Noguchi, Hirofumi Ooguri
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Publication number: 20170183566Abstract: A method of producing a thiogallate-based fluorescent material having a large particle diameter and an enhanced luminance, and a sulfite for a thiogallate-based fluorescent material are provided. The method of producing a thiogallate-based fluorescent material includes preparing a first solution containing at least one element M1 selected from the group consisting of strontium, beryllium, magnesium, calcium, barium and zinc, and at least one element M2 selected from the group consisting of europium and cerium, and a second solution containing a sulfite; simultaneously supplying the first solution and the second solution to a reaction vessel and causing a reaction in a reaction system to obtain a powder of a sulfite containing M1 and M2; and obtaining the thiogallate-based fluorescent material from the resulting powder of a sulfite containing M1 and M2.Type: ApplicationFiled: December 23, 2016Publication date: June 29, 2017Applicant: NICHIA CORPORATIONInventor: Hirofumi OOGURI
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Publication number: 20160289555Abstract: A fluorescent material particle including: a particle that contains a thiogallate phosphor and a first adherent member containing boron oxide and being disposed on the surface of the particle, a method for producing the fluorescent material particles, and a light emitting device are provided.Type: ApplicationFiled: March 29, 2016Publication date: October 6, 2016Applicant: NICHIA CORPORATIONInventors: Tsunehito NIIMI, Koji KAJIKAWA, Hirofumi OOGURI
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Publication number: 20150267109Abstract: To provide Zinc Sulfide activated with Silver (ZnS:Ag) based fluorescent material for detecting particle beams, having lower gamma-ray sensitivity and providing lower afterglow, and being specialized for the purpose of detecting particle beams, and its manufacturing method. Zinc Sulfide activated with Silver (ZnS:Ag) based fluorescent material for detecting particle beams emits fluorescence with wavelengths from 320 nm to 580 nmin response to alpha-ray irradiation, and has a fluorescence spectrum with a peak wavelength from 395 nm to 410 nm.Type: ApplicationFiled: March 17, 2015Publication date: September 24, 2015Inventors: Tatsuya NAKAMURA, Masaki KATAGIRI, Yasunobu NOGUCHI, Hirofumi OOGURI