Patents by Inventor Yohei KAWANO
Yohei KAWANO 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: 20240125456Abstract: A light source unit includes light-emitting elements, a light-shielding body, and a rod lens including a first end surface, a second end surface, and a side surface. The light-shielding body is separated from the side surface, covers the side surface, includes an opening exposing at least a portion of the second end surface, and includes a tip protruding further than the second end surface in a first direction from the first end surface toward the second end surface. A first plane crosses the first direction and is at the same first-direction position as the tip. A second plane crosses the first direction and is at the same position as the second end surface or between the tip and second end surface in the first direction. A first surface area of the opening at the first plane is greater than a second surface area of the opening at the second plane.Type: ApplicationFiled: October 6, 2020Publication date: April 18, 2024Applicant: NICHIA CORPORATIONInventor: Yohei KAWANO
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Patent number: 11924937Abstract: A light-emitting device includes an optical member including first and second light emitting elements, first and second light condenser portions, and a light guide portion. The first light condenser portion is disposed at a position corresponding to the first light-emitting element, and condenses a portion of light emitted from the first light-emitting element. The second light condenser portion surrounds the first light condenser portion, and condenses a portion of the light that is not incident to the first light condenser portion among the light emitted from the first light-emitting element. The light guide portion is disposed at a periphery of the second light condenser portion and at a position corresponding to the second light-emitting element, and guides light emitted from the second light-emitting element by causing total reflection in an interior of the light guide portion.Type: GrantFiled: May 21, 2021Date of Patent: March 5, 2024Assignee: NICHIA CORPORATIONInventors: Kohei Shima, Yohei Kawano, Akira Asano
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Publication number: 20210278060Abstract: A light-emitting device includes an optical member including first and second light emitting elements, first and second light condenser portions, and a light guide portion. The first light condenser portion is disposed at a position corresponding to the first light-emitting element, and condenses a portion of light emitted from the first light-emitting element. The second light condenser portion surrounds the first light condenser portion, and condenses a portion of the light that is not incident to the first light condenser portion among the light emitted from the first light-emitting element. The light guide portion is disposed at a periphery of the second light condenser portion and at a position corresponding to the second light-emitting element, and guides light emitted from the second light-emitting element by causing total reflection in an interior of the light guide portion.Type: ApplicationFiled: May 21, 2021Publication date: September 9, 2021Applicant: NICHIA CORPORATIONInventors: Kohei SHIMA, Yohei KAWANO, Akira ASANO
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Patent number: 11047549Abstract: A light-emitting device includes an optical member including first and second light emitting elements, first and second light condenser portions, and a light guide portion. The first light condenser portion is disposed at a position corresponding to the first light-emitting element, and condenses a portion of light emitted from the first light-emitting element. The second light condenser portion surrounds the first light condenser portion, and condenses a portion of the light that is not incident to the first light condenser portion among the light emitted from the first light-emitting element. The light guide portion is disposed at a periphery of the second light condenser portion and at a position corresponding to the second light-emitting element, and guides light emitted from the second light-emitting element by causing total reflection in an interior of the light guide portion.Type: GrantFiled: October 30, 2019Date of Patent: June 29, 2021Assignee: NICHIA CORPORATIONInventors: Kohei Shima, Yohei Kawano, Akira Asano
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Patent number: 10982835Abstract: A light-emitting device includes a concentrator, a first tubular body surrounding the concentrator, one or more first light-emitting elements disposed at a position corresponding to the concentrator, and a plurality of second light-emitting elements. The first tubular body is transparent. The first tubular body has a plurality of recesses formed in an end portion of the first tubular body. Portions of the first tubular body between the recesses form light guide portions. The plurality of second light-emitting elements are disposed at positions corresponding to a plurality of the light guide portions.Type: GrantFiled: April 17, 2020Date of Patent: April 20, 2021Assignee: NICHIA CORPORATIONInventors: Kohei Shima, Yohei Kawano
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Publication number: 20200332981Abstract: A light-emitting device includes a concentrator, a first tubular body surrounding the concentrator, one or more first light-emitting elements disposed at a position corresponding to the concentrator, and a plurality of second light-emitting elements. The first tubular body is transparent. The first tubular body has a plurality of recesses formed in an end portion of the first tubular body. Portions of the first tubular body between the recesses form light guide portions. The plurality of second light-emitting elements are disposed at positions corresponding to a plurality of the light guide portions.Type: ApplicationFiled: April 17, 2020Publication date: October 22, 2020Applicant: NICHIA CORPORATIONInventors: Kohei SHIMA, Yohei KAWANO
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Patent number: 10775554Abstract: A light pipe includes an emission end portion with a light exit surface and a back surface opposite the light exit surface; a columnar light-guide portion protruding from the back surface; and at least one annular light-guide portion protruding from the back surface and concentrically surrounding the columnar light-guide portion; and a gap separating the annular light-guide portion and the columnar light-guide portion. An illumination device includes a light source unit having an annular array of light emitting diodes; a reflector; and the light pipe positioned between the light source unit and the reflector.Type: GrantFiled: October 16, 2018Date of Patent: September 15, 2020Assignee: NichiaInventor: Yohei Kawano
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Publication number: 20200132259Abstract: A light-emitting device includes an optical member including first and second light emitting elements, first and second light condenser portions, and a light guide portion. The first light condenser portion is disposed at a position corresponding to the first light-emitting element, and condenses a portion of light emitted from the first light-emitting element. The second light condenser portion surrounds the first light condenser portion, and condenses a portion of the light that is not incident to the first light condenser portion among the light emitted from the first light-emitting element. The light guide portion is disposed at a periphery of the second light condenser portion and at a position corresponding to the second light-emitting element, and guides light emitted from the second light-emitting element by causing total reflection in an interior of the light guide portion.Type: ApplicationFiled: October 30, 2019Publication date: April 30, 2020Applicant: NICHIA CORPORATIONInventors: Kohei SHIMA, Yohei KAWANO, Akira ASANO
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Publication number: 20190113677Abstract: A light pipe includes an emission end portion having a light exit surface; a columnar light-guide portion protruding from a surface of the emission end portion opposite to the light exit surface; and one or two or more annular light-guide portions protruding from the surface of the emission end portion opposite to the light exit surface and concentrically surrounding the columnar light-guide portion while spaced apart from the columnar light-guide portion.Type: ApplicationFiled: October 16, 2018Publication date: April 18, 2019Applicant: NICHIA CORPORATIONInventor: Yohei KAWANO