Patents by Inventor Takeshi Kawahara
Takeshi Kawahara 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: 11979226Abstract: A wavelength cross-connect device performs relay processing, the relay processing being such that wavelength multiplexed signal lights, which are multiband transmitted from a plurality of routes, are demultiplexed into different wavelength bands, and for each route, respective optical signals of the different wavelength bands are amplified, then subject to route change by WSSs and outputted to output side routes M. The device includes C-band WXC units that are the same in total number as the wavelength bands of the optical signals of the respective wavelength bands and perform relay processing on optical signals of a specific wavelength band of the different wavelength bands.Type: GrantFiled: February 4, 2020Date of Patent: May 7, 2024Assignee: Nippon Telegraph and Telephone CorporationInventors: Hiroki Kawahara, Takeshi Seki, Sachio Suda, Kohei Saito, Kenta Hirose
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Patent number: 11581544Abstract: An energy storage device includes a current collector (negative electrode current collector), electrode body that includes a body portion and a tab projecting from the body portion, and a leading plate (negative electrode leading plate) that connects the current collector and the tab. In the leading plate, first and second plates and facing each other are continuously connected at end portions thereof in the first plate, the current collector is fixed to a first principal surface on the opposite side to the second plate. In the second plate, the tab is fixed to a second principal surface on the opposite side to the first plate.Type: GrantFiled: September 16, 2016Date of Patent: February 14, 2023Assignee: GS YUASA INTERNATIONAL LTD.Inventors: Kenji Kawate, Takeshi Kawahara, Tomoko Nishikawa
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Publication number: 20210336288Abstract: An energy storage device includes an electrode body in which an electrode is stacked, a container in which the electrode body is accommodated, a cover plate structure including a cover plate that closes the container, and a spacer that is attached to the electrode body. The spacer includes a positioning unit that positions the cover plate structure. An engaging unit, engaging with the positioning unit, is provided in the cover plate structure.Type: ApplicationFiled: July 9, 2021Publication date: October 28, 2021Inventors: Kenji KAWATE, Takao Maki, Takeshi Kawahara
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Patent number: 11081723Abstract: An energy storage device includes: an electrode body including curved portions formed by winding an electrode; a container in which the electrode body is accommodated; and a cover plate structure including a cover plate closing the container. The electrode body is accommodated in the container while one end portion in a winding axis direction of the electrode body faces the cover plate structure. The energy storage device includes spacers (side spacers) that are attached to curved portions, and one end portion of the spacer abuts on a part of the cover plate structure.Type: GrantFiled: September 16, 2016Date of Patent: August 3, 2021Assignee: GS YUASA INTERNATIONAL LTD.Inventors: Kenji Kawate, Takao Maki, Takeshi Kawahara
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Patent number: 11079627Abstract: A liquid crystal display device includes: a liquid crystal display panel that includes red color filters, green color filters, and blue color filters; and an illumination device that illuminates the liquid crystal display panel with white light. The illumination device includes light-emitting elements that emit blue light, a green phosphor that absorbs a portion of the blue light emitted from the light-emitting elements and then emits green light, and a red phosphor that absorbs a portion of the blue light emitted from the light-emitting elements and then emits red light. The blue color filters are made of a colored material that contains a dye, and the chromaticity values x and y of the white light emitted from the illumination device satisfy the relationships 0.24<x and 0.24<y.Type: GrantFiled: February 25, 2019Date of Patent: August 3, 2021Assignee: SHARP KABUSHIKI KAISHAInventors: Masatsugu Masuda, Hideaki Fujii, Takeshi Kawahara, Toshiyuki Tanaka, Kenichi Yoshimura, Makoto Yoshimura, Masataka Miyata, Takehiro Shiomoto
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Patent number: 10930700Abstract: A semiconductor photodetector includes a semiconductor substrate including a silicon substrate. The semiconductor substrate includes a second main surface as a light incident surface and a first main surface opposing the second main surface. In the semiconductor substrate, carriers are generated in response to incident light. A plurality of protrusions is formed on the second main surface. The protrusion includes a slope inclined with respect to a thickness direction of the semiconductor substrate. At the protrusion, a (111) surface of the semiconductor substrate is exposed as the slope. The height of the protrusion is equal to or more than 200 nm.Type: GrantFiled: October 9, 2019Date of Patent: February 23, 2021Assignee: HAMAMATSU PHOTONICS K.K.Inventors: Tatsuki Kasuya, Takeshi Kawahara, Yasuhito Miyazaki, Kentaro Maeta, Hisanori Suzuki
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Patent number: 10833298Abstract: An energy storage device includes an electrode body in which an electrode is wound, a case that stores the electrode body, and spacers (side spacers) interposed between the case and the electrode body. The spacers each have an opening that exposes a portion of faces of curved portions of the electrode body from one end to the other end of the electrode body in a winding axis direction of the electrode body.Type: GrantFiled: September 16, 2016Date of Patent: November 10, 2020Assignee: GS YUASA INTERNATIONAL LTD.Inventors: Kenji Kawate, Takeshi Kawahara, Tomoko Nishikawa
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Publication number: 20200043974Abstract: A semiconductor photodetector includes a semiconductor substrate including a silicon substrate. The semiconductor substrate includes a second main surface as a light incident surface and a first main surface opposing the second main surface. In the semiconductor substrate, carriers are generated in response to incident light. A plurality of protrusions is formed on the second main surface. The protrusion includes a slope inclined with respect to a thickness direction of the semiconductor substrate. At the protrusion, a (111) surface of the semiconductor substrate is exposed as the slope. The height of the protrusion is equal to or more than 200 nm.Type: ApplicationFiled: October 9, 2019Publication date: February 6, 2020Applicant: HAMAMATSU PHOTONICS K.K.Inventors: Tatsuki Kasuya, Takeshi Kawahara, Yasuhito Miyazaki, Kentaro Maeta, Hisanori Suzuki
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Patent number: 10529772Abstract: A semiconductor photodetector includes a semiconductor substrate including a silicon substrate. The semiconductor substrate includes a second main surface as a light incident surface and a first main surface opposing the second main surface. In the semiconductor substrate, carriers are generated in response to incident light. A plurality of protrusions is formed on the second main surface. The protrusion includes a slope inclined with respect to a thickness direction of the semiconductor substrate. At the protrusion, a (111) surface of the semiconductor substrate is exposed as the slope. The height of the protrusion is equal to or more than 200 nm.Type: GrantFiled: March 1, 2017Date of Patent: January 7, 2020Assignee: HAMAMATSU PHOTONICS K.K.Inventors: Tatsuki Kasuya, Takeshi Kawahara, Yasuhito Miyazaki, Kentaro Maeta, Hisanori Suzuki
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Publication number: 20190235318Abstract: A liquid crystal display device includes: a liquid crystal display panel that includes red color filters, green color filters, and blue color filters; and an illumination device that illuminates the liquid crystal display panel with white light. The illumination device includes light-emitting elements that emit blue light, a green phosphor that absorbs a portion of the blue light emitted from the light-emitting elements and then emits green light, and a red phosphor that absorbs a portion of the blue light emitted from the light-emitting elements and then emits red light. The blue color filters are made of a colored material that contains a dye, and the chromaticity values x and y of the white light emitted from the illumination device satisfy the relationships 0.24<x and 0.24<y.Type: ApplicationFiled: February 25, 2019Publication date: August 1, 2019Inventors: MASATSUGU MASUDA, HIDEAKI FUJII, TAKESHI KAWAHARA, TOSHIYUKI TANAKA, KENICHI YOSHIMURA, MAKOTO YOSHIMURA, MASATAKA MIYATA, TAKEHIRO SHIOMOTO
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Patent number: 10261360Abstract: A liquid crystal display device includes: a liquid crystal display panel that includes red color filters, green color filters, and blue color filters; and an illumination device that illuminates the liquid crystal display panel with white light. The illumination device includes light-emitting elements that emit blue light, a green phosphor that absorbs a portion of the blue light emitted from the light-emitting elements and then emits green light, and a red phosphor that absorbs a portion of the blue light emitted from the light-emitting elements and then emits red light. The blue color filters are made of a colored material that contains a dye, and the chromaticity values x and y of the white light emitted from the illumination device satisfy the relationships 0.24<x and 0.24<y.Type: GrantFiled: October 2, 2015Date of Patent: April 16, 2019Assignee: SHARP KABUSHIKI KAISHAInventors: Masatsugu Masuda, Hideaki Fujii, Takeshi Kawahara, Toshiyuki Tanaka, Kenichi Yoshimura, Makoto Yoshimura, Masataka Miyata, Takehiro Shiomoto
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Publication number: 20190035843Abstract: A semiconductor photodetector includes a semiconductor substrate including a silicon substrate. The semiconductor substrate includes a second main surface as a light incident surface and a first main surface opposing the second main surface. In the semiconductor substrate, carriers are generated in response to incident light. A plurality of protrusions is formed on the second main surface. The protrusion includes a slope inclined with respect to a thickness direction of the semiconductor substrate. At the protrusion, a (111) surface of the semiconductor substrate is exposed as the slope. The height of the protrusion is equal to or more than 200 nm.Type: ApplicationFiled: March 1, 2017Publication date: January 31, 2019Applicant: HAMAMATSU PHOTONICS K.K.Inventors: Tatsuki KASUYA, Takeshi KAWAHARA, Yasuhito MIYAZAKI, Kentaro MAETA, Hisanori SUZUKI
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Publication number: 20180269523Abstract: An energy storage device includes: an electrode body including curved portions formed by winding an electrode; a container in which the electrode body is accommodated; and a cover plate structure including a cover plate closing the container. The electrode body is accommodated in the container while one end portion in a winding axis direction of the electrode body faces the cover plate structure. The energy storage device includes spacers (side spacers) that are attached to curved portions, and one end portion of the spacer abuts on a part of the cover plate structure.Type: ApplicationFiled: September 16, 2016Publication date: September 20, 2018Inventors: Kenji KAWATE, TaKao MAKI, Takeshi KAWAHARA
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Publication number: 20180261806Abstract: An energy storage device includes an electrode body in which an electrode is wound, a case that stores the electrode body, and spacers (side spacers) interposed between the case and the electrode body. The spacers each have an opening that exposes a portion of faces of curved portions of the electrode body from one end to the other end of the electrode body in a winding axis direction of the electrode body.Type: ApplicationFiled: September 16, 2016Publication date: September 13, 2018Inventors: Kenji KAWATE, Takeshi KAWAHARA, Tomoko NISHIKAWA
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Publication number: 20180261849Abstract: An energy storage device includes a current collector (negative electrode current collector), electrode body that includes a body portion and a tab projecting from the body portion, and a leading plate (negative electrode leading plate) that connects the current collector and the tab. In the leading plate, first and second plates and facing each other are continuously connected at end portions thereof. In the first plate, the current collector is fixed to a first principal surface on the opposite side to the second plate. In the second plate, the tab is fixed to a second principal surface on the opposite side to the first plate.Type: ApplicationFiled: September 16, 2016Publication date: September 13, 2018Inventors: Kenji KAWATE, Takeshi KAWAHARA, Tomoko NISHIKAWA
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Publication number: 20170315405Abstract: A liquid crystal display device includes: a liquid crystal display panel that includes red color filters, green color filters, and blue color filters; and an illumination device that illuminates the liquid crystal display panel with white light. The illumination device includes light-emitting elements that emit blue light, a green phosphor that absorbs a portion of the blue light emitted from the light-emitting elements and then emits green light, and a red phosphor that absorbs a portion of the blue light emitted from the light-emitting elements and then emits red light. The blue color filters are made of a colored material that contains a dye, and the chromaticity values x and y of the white light emitted from the illumination device satisfy the relationships 0.24<x and 0.24<y.Type: ApplicationFiled: October 2, 2015Publication date: November 2, 2017Applicant: Sharp Kabushiki KaishaInventors: Masatsugu MASUDA, Hideaki FUJII, Takeshi KAWAHARA, Toshiyuki TANAKA, Kenichi YOSHIMURA, Makoto YOSHIMURA, Masataka MIYATA, Takehiro SHIOMOTO
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Patent number: 9583742Abstract: A battery comprises: a container including a bottom portion, long-sidewall portions each standing on a corresponding one of longer side portions of the bottom portion, short-sidewall portions each standing on a corresponding one of two shorter side portions of the bottom portion, and a welded portion in which portions of a flat plate are mutually welded; an electrode assembly housed in the container; an electrode terminal; and a lid closing the container, the container having a cuboid shape, the bottom portion being rectangular, the long-sidewall portions each being rectangular, the short-sidewall portions each being rectangular, the flat plate being made of metal and being folded, and the portions of the flat plate being mutually abutting or overlapping.Type: GrantFiled: May 22, 2012Date of Patent: February 28, 2017Assignee: GS YUASA INTERNATIONAL LTD.Inventors: Noriyoshi Munenaga, Taku Nakamura, Wataru Mashiko, Takeshi Kawahara
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Patent number: 9064354Abstract: An authentication registration/invalidation apparatus is provided, which allows easy invalidation of an authentication tag when the authentication tag is lost, and facilitates management of authentication tags. When an RFID reader (2) receives an RFID signal including an instruction of invalidation, which is transmitted from an operation tag (10b) in a recognition area (A), an invalidation unit (32b) sets an operation mode to an invalidation enabled mode. If an RFID tag recognizer (31a) recognizes an authentication tag (10a) before or after the setting of the invalidation enabled mode, the invalidation unit 32b invalidates the authentication tag (10a), or invalidates all authentication tags (10a) that belong to a group to which the authentication tag belongs.Type: GrantFiled: April 25, 2014Date of Patent: June 23, 2015Assignee: OPTEX CO., LTD.Inventors: Masanao Shiraishi, Mitsugu Mihara, Hiroyuki Ohba, Takeshi Kawahara, Yasuhiro Hosaki, Satoshi Sogabe, Tomoki Kaneyama, Tomoya Masuyama, Kazuo Komiyama
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Patent number: 9022297Abstract: A trigger signal generating device outputs a trigger signal activating an IC tag. The trigger signal generating device includes first and second trigger coils placed at a predetermined separation distance and each having predetermined magnetic field intensity distribution. Each of the first and second trigger coils includes attenuating means for attenuating intensity of a magnetic field generated by the first and second trigger coils to a predetermined level that allows the ID tag to detect trigger IDs of the first and second trigger coils on a side on which the first and second trigger coils are provided, and that does not allow the ID tag to detect the trigger ID of the first trigger coil on an opposite side to the side on which the first and second trigger coils are provided.Type: GrantFiled: October 1, 2012Date of Patent: May 5, 2015Assignee: Matrix Inc.Inventor: Takeshi Kawahara
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Publication number: 20140346229Abstract: A trigger signal generating device outputs a trigger signal activating an IC tag. The trigger signal generating device includes first and second trigger coils placed at a predetermined separation distance and each having predetermined magnetic field intensity distribution. Each of the first and second trigger coils includes attenuating means for attenuating intensity of a magnetic field generated by the first and second trigger coils to a predetermined level that allows the ID tag to detect trigger IDs of the first and second trigger coils on a side on which the first and second trigger coils are provided, and that does not allow the ID tag to detect the trigger ID of the first trigger coil on an opposite side to the side on which the first and second trigger coils are provided.Type: ApplicationFiled: October 1, 2012Publication date: November 27, 2014Inventor: Takeshi Kawahara