Patents by Inventor Takashi KAIDE
Takashi KAIDE 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: 11753302Abstract: Provided a method of producing a ?-sialon fluorescent material having excellent emission intensity. The method includes providing a first composition containing aluminum, an oxygen atom, and a europium-containing silicon nitride, heat treating the first composition, contacting the heat-treated composition and a basic substance to obtain a second composition, and contacting the second composition resulting from contacting the heat-treated composition with the basic substance and an acidic liquid medium containing an acidic substance.Type: GrantFiled: October 3, 2022Date of Patent: September 12, 2023Assignee: NICHIA CORPORATIONInventors: Kenichi Aoyagi, Takashi Kaide, Yuya Takahashi, Shoji Hosokawa
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Publication number: 20230045233Abstract: Provided a method of producing a ?-sialon fluorescent material having excellent emission intensity. The method includes providing a first composition containing aluminum, an oxygen atom, and a europium-containing silicon nitride, heat treating the first composition, contacting the heat-treated composition and a basic substance to obtain a second composition, and contacting the second composition resulting from contacting the heat-treated composition with the basic substance and an acidic liquid medium containing an acidic substance.Type: ApplicationFiled: October 3, 2022Publication date: February 9, 2023Applicant: NICHIA CORPORATIONInventors: Kenichi AOYAGI, Takashi KAIDE, Yuya TAKAHASHI, Shoji HOSOKAWA
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Patent number: 11512248Abstract: Provided a method of producing a ?-sialon fluorescent material having excellent emission intensity. The method includes providing a first composition containing aluminum, an oxygen atom, and a europium-containing silicon nitride, heat treating the first composition, contacting the heat-treated composition and a basic substance to obtain a second composition, and contacting the second composition resulting from contacting the heat-treated composition with the basic substance and an acidic liquid medium containing an acidic substance.Type: GrantFiled: September 25, 2020Date of Patent: November 29, 2022Assignee: NICHIA CORPORATIONInventors: Kenichi Aoyagi, Takashi Kaide, Yuya Takahashi, Shoji Hosokawa
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Patent number: 11512250Abstract: Provided is a method of producing a ?-sialon fluorescent material having a high light emission intensity and an excellent light emission luminance. The method includes preparing a calcined product having a composition of ?-sialon containing an activating element; grinding the calcined product to obtain a ground product; and heat-treating the ground product to obtain a heat-treated product. A specific surface area of the ground product is 0.2 m2/g or more.Type: GrantFiled: December 14, 2020Date of Patent: November 29, 2022Assignee: NICHIA CORPORATIONInventors: Kenichi Aoyagi, Takashi Kaide, Motoharu Morikawa, Shoji Hosokawa
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Patent number: 11427758Abstract: A method for producing ?-sialon fluorescent material having excellent emission intensity is provided. The method for producing ?-sialon fluorescent material includes providing a composition comprising silicon nitride that contains aluminium, an oxygen atom, and europium, heat treating the composition, contacting the heat-treated composition with a basic substance, and washing the composition, which has been contacted with the basic substance, with an acidic liquid medium.Type: GrantFiled: July 8, 2019Date of Patent: August 30, 2022Assignee: NICHIA CORPORATIONInventors: Motoharu Morikawa, Shoji Hosokawa, Takashi Kaide, Kenichi Aoyagi
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Publication number: 20210095202Abstract: Provided a method of producing a ?-sialon fluorescent material having excellent emission intensity. The method includes providing a first composition containing aluminum, an oxygen atom, and a europium-containing silicon nitride, heat treating the first composition, contacting the heat-treated composition and a basic substance to obtain a second composition, and contacting the second composition resulting from contacting the heat-treated composition with the basic substance and an acidic liquid medium containing an acidic substance.Type: ApplicationFiled: September 25, 2020Publication date: April 1, 2021Applicant: NICHIA CORPORATIONInventors: Kenichi AOYAGI, Takashi KAIDE, Yuya TAKAHASHI, Shoji HOSOKAWA
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Publication number: 20210095203Abstract: Provided is a method of producing a ?-sialon fluorescent material having a high light emission intensity and an excellent light emission luminance. The method includes preparing a calcined product having a composition of ?-sialon containing an activating element; grinding the calcined product to obtain a ground product; and heat-treating the ground product to obtain a heat-treated product. A specific surface area of the ground product is 0.2 m2/g or more.Type: ApplicationFiled: December 14, 2020Publication date: April 1, 2021Applicant: NICHIA CORPORATIONInventors: Kenichi AOYAGI, Takashi KAIDE, Motoharu MORIKAWA, Shoji HOSOKAWA
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Patent number: 10961451Abstract: A fluorescent material is provided that has improved luminance and can generate fluorescence by excitation light in wider wavelength range. A fluorescent material represented by a general formula LaxCeySi6N8+x+y, wherein 2.0?x?3.5, 0<y?1.0, wherein the fluorescent material comprises 10 to 10000 ppm of Ba and/or Sr, and wherein a first wavelength and a second wavelength at which excitation intensities are 70% of the maximum of the excitation intensities are present in a wavelength range of 400 to 510 nm, the second wavelength being longer than the first wavelength, and a difference between the first wavelength and the second wavelength being 70 nm or more.Type: GrantFiled: July 7, 2015Date of Patent: March 30, 2021Assignee: NICHIA CORPORATIONInventors: Takashi Kaide, Shoji Hosokawa
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Patent number: 10894917Abstract: Provided is a method of producing a ?-sialon fluorescent material having a high light emission intensity and an excellent light emission luminance. The method includes preparing a calcined product having a composition of ?-sialon containing an activating element; grinding the calcined product to obtain a ground product; and heat-treating the ground product to obtain a heat-treated product. A specific surface area of the ground product is 0.2 m2/g or more.Type: GrantFiled: May 26, 2017Date of Patent: January 19, 2021Assignee: NICHIA CORPORATIONInventors: Kenichi Aoyagi, Takashi Kaide, Motoharu Morikawa, Shoji Hosokawa
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Patent number: 10833230Abstract: A wavelength converting member comprising a first wavelength converting layer containing: a first fluorescent material having a light emission peak wavelength in a range of 620 nm or more and 660 nm or less; a second fluorescent material having a light emission peak wavelength in a range of 510 nm or more and 560 nm or less; and a resin, wherein the average particle diameter, as measured according to a Fisher Sub-Sieve Sizer method, of the first fluorescent material is in a range of 2 ?m or more and 30 ?m or less, wherein the second fluorescent material comprises a ?-SiAlON fluorescent material, the circularity of the ?-SiAlON fluorescent material is 0.7 or more, and the volume average particle diameter, as measured according to a laser diffraction scattering particle size distribution measuring method, of the ?-SiAlON fluorescent material is in a range of 2 ?m or more and 30 ?m or less, and wherein the thickness of the first wavelength converting layer is in a range of 50 ?m or more and 200 ?m or less.Type: GrantFiled: February 18, 2020Date of Patent: November 10, 2020Assignee: NICHIA CORPORATIONInventors: Kenichi Aoyagi, Takashi Kaide, Takuya Nakabayashi, Tetsuya Ishikawa, Shoji Hosokawa
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Publication number: 20200185575Abstract: A wavelength converting member comprising a first wavelength converting layer containing: a first fluorescent material having a light emission peak wavelength in a range of 620 nm or more and 660 nm or less; a second fluorescent material having a light emission peak wavelength in a range of 510 nm or more and 560 nm or less; and a resin, wherein the average particle diameter, as measured according to a Fisher Sub-Sieve Sizer method, of the first fluorescent material is in a range of 2 ?m or more and 30 ?m or less, wherein the second fluorescent material comprises a ?-SiAlON fluorescent material, the circularity of the ?-SiAlON fluorescent material is 0.7 or more, and the volume average particle diameter, as measured according to a laser diffraction scattering particle size distribution measuring method, of the ?-SiAlON fluorescent material is in a range of 2 ?m or more and 30 ?m or less, and wherein the thickness of the first wavelength converting layer is in a range of 50 ?m or more and 200 ?m or less.Type: ApplicationFiled: February 18, 2020Publication date: June 11, 2020Applicant: NICHIA CORPORATIONInventors: Kenichi AOYAGI, Takashi KAIDE, Takuya NAKABAYASHI, Tetsuya ISHIKAWA, Shoji HOSOKAWA
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Patent number: 10608149Abstract: A wavelength converting member comprising a first wavelength converting layer containing: a first fluorescent material having a light emission peak wavelength in a range of 620 nm or more and 660 nm or less; a second fluorescent material having a light emission peak wavelength in a range of 510 nm or more and 560 nm or less; and a resin, wherein the average particle diameter, as measured according to a Fisher Sub-Sieve Sizer method, of the first fluorescent material is in a range of 2 ?m or more and 30 ?m or less, wherein the second fluorescent material comprises a ?-SiAlON fluorescent material, the circularity of the ?-SiAlON fluorescent material is 0.7 or more, and the volume average particle diameter, as measured according to a laser diffraction scattering particle size distribution measuring method, of the ?-SiAlON fluorescent material is in a range of 2 ?m or more and 30 ?m or less, and wherein the thickness of the first wavelength converting layer is in a range of 50 ?m or more and 200 ?m or less.Type: GrantFiled: March 29, 2019Date of Patent: March 31, 2020Assignee: NICHIA CORPORATIONInventors: Kenichi Aoyagi, Takashi Kaide, Takuya Nakabayashi, Tetsuya Ishikawa, Shoji Hosokawa
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Publication number: 20190330528Abstract: A method for producing ?-sialon fluorescent material having excellent emission intensity is provided. The method for producing ?-sialon fluorescent material includes providing a composition comprising silicon nitride that contains aluminium, an oxygen atom, and europium, heat treating the composition, contacting the heat-treated composition with a basic substance, and washing the composition, which has been contacted with the basic substance, with an acidic liquid medium.Type: ApplicationFiled: July 8, 2019Publication date: October 31, 2019Applicant: NICHIA CORPORATIONInventors: Motoharu MORIKAWA, Shoji HOSOKAWA, Takashi KAIDE, Kenichi AOYAGI
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Publication number: 20190305193Abstract: A wavelength converting member comprising a first wavelength converting layer containing: a first fluorescent material having a light emission peak wavelength in a range of 620 nm or more and 660 nm or less; a second fluorescent material having a light emission peak wavelength in a range of 510 nm or more and 560 nm or less; and a resin, wherein the average particle diameter, as measured according to a Fisher Sub-Sieve Sizer method, of the first fluorescent material is in a range of 2 ?m or more and 30 ?m or less, wherein the second fluorescent material comprises a ?-SiAlON fluorescent material, the circularity of the ?-SiAlON fluorescent material is 0.7 or more, and the volume average particle diameter, as measured according to a laser diffraction scattering particle size distribution measuring method, of the ?-SiAlON fluorescent material is in a range of 2 ?m or more and 30 ?m or less, and wherein the thickness of the first wavelength converting layer is in a range of 50 ?m or more and 200 ?m or less.Type: ApplicationFiled: March 29, 2019Publication date: October 3, 2019Applicant: NICHIA CORPORATIONInventors: Kenichi AOYAGI, Takashi KAIDE, Takuya NAKABAYASHI, Tetsuya ISHIKAWA, Shoji HOSOKAWA
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Patent number: 10316249Abstract: A method for producing a ?-sialon fluorescent material superior in light emitting luminance is provided. The method includes heat-treating a first mixture containing an aluminum compound, a europium compound, and a first silicon oxynitride compound to obtain a first heat-treated product, and heat-treating a second mixture containing the first heat-treated product, an aluminum compound, a europium compound, and a second silicon oxynitride compound, which has a larger oxygen content than the first silicon oxynitride compound, to obtain a second heat-treated product.Type: GrantFiled: May 26, 2016Date of Patent: June 11, 2019Assignee: NICHIA CORPORATIONInventors: Motoharu Morikawa, Kenichi Aoyagi, Takashi Kaide, Shoji Hosokawa
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Patent number: 10190044Abstract: A method for producing a ?-sialon fluorescent material can be provided. The method includes preparing a composition containing silicon nitride that contains aluminium, an oxygen atom, and europium, heat-treating the composition in a rare gas atmosphere or in a vacuum, and contacting the heat-treated composition with a gas containing elemental fluorine.Type: GrantFiled: August 4, 2016Date of Patent: January 29, 2019Assignee: NICHIA CORPORATIONInventors: Shoji Hosokawa, Motoharu Morikawa, Tadayoshi Yanagihara, Kenichi Aoyagi, Takashi Kaide
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Patent number: 10093855Abstract: A method for producing a ?-sialon fluorescent material is provided. The method includes heat-treating a mixture containing an aluminum compound, a first europium compound, and silicon nitride to obtain a first heat-treated product; and heat-treating the first heat-treated product with a second europium compound in a rare gas atmosphere to obtain a second heat-treated product.Type: GrantFiled: June 3, 2016Date of Patent: October 9, 2018Assignee: NICHIA CORPORATIONInventors: Kenichi Aoyagi, Takashi Kaide, Motoharu Morikawa, Shoji Hosokawa
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Patent number: 10032965Abstract: A phosphor, which is represented by the general formula containing M, Ce, Pr, Si, and N, is provided. M is at least one element selected from the group consisting of La, Y, Tb and Lu. A molar ratio of M is greater than 2.0 and smaller than 3.5. A molar ratio of Ce is greater than 0 and smaller than 1.0. A molar ratio of Pr is greater than 0 and smaller than 0.05. A molar ratio of N is greater than 10 and smaller than 12, under the condition that a molar ratio of Si is set to 6. The phosphor further contains 10 to 10,000 ppm of fluorine.Type: GrantFiled: May 6, 2016Date of Patent: July 24, 2018Assignee: NICHIA CORPORATIONInventors: Takashi Kaide, Shoji Hosokawa
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Publication number: 20170342321Abstract: Provided is a method of producing a ?-sialon fluorescent material having a high light emission intensity and an excellent light emission luminance. The method includes preparing a calcined product having a composition of ?-sialon containing an activating element; grinding the calcined product to obtain a ground product; and heat-treating the ground product to obtain a heat-treated product. A specific surface area of the ground product is 0.2 m2/g or more.Type: ApplicationFiled: May 26, 2017Publication date: November 30, 2017Applicant: NICHIA CORPORATIONInventors: Kenichi AOYAGI, Takashi KAIDE, Motoharu MORIKAWA, Shoji HOSOKAWA
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Patent number: 9705049Abstract: A phosphor is provided which is represented by the general formula MxCeySi6-zBzN8+w. M is at least one element selected from the group consisting of La, Y, Tb and Lu. And w, x, y, and z satisfy 2.0<w<4.0, 2.0<x<3.5, 0<y<1.0, and 0<z<2.0, respectively. The phosphor can be efficiently excited by light in a range from near-ultraviolet to blue light, and emit light having components that widely extend mainly from green range to yellow range. A light-emitting apparatus includes the phosphor together with a light-emitting device that emits light in a range from near-ultraviolet to blue light, and can have improved light emission efficiency, good color rendering property, and good color reproduction range. In the case where a light-emitting apparatus includes an additional phosphor, it is possible to further improve its light emission spectrum.Type: GrantFiled: April 25, 2014Date of Patent: July 11, 2017Assignee: NICHIA CORPORATIONInventors: Takashi Kaide, Shoji Hosokawa