Patents by Inventor Jun Muramatsu
Jun Muramatsu 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: 11942506Abstract: The photosensitive region includes a first impurity region and a second impurity region having a higher impurity concentration than that of the first impurity region. The photosensitive region includes one end positioned away from the transfer section in the second direction and another end positioned closer to the transfer section in the second direction. A shape of the second impurity region in plan view is line-symmetric with respect to a center line of the photosensitive region along the second direction. A width of the second impurity region in the first direction increases in a transfer direction from the one end to the other end. An increase rate of the width of the second impurity region in each of sections, obtained by dividing the photosensitive region into n sections in the second direction, becomes gradually higher in the transfer direction. Here, n is an integer of two or more.Type: GrantFiled: July 19, 2018Date of Patent: March 26, 2024Assignee: HAMAMATSU PHOTONICS K.K.Inventors: Shin-ichiro Takagi, Mitsuhito Mase, Jun Hiramitsu, Yasuhito Yoneta, Masaharu Muramatsu
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Publication number: 20240085606Abstract: A laminate in which the occurrence of cracks is suppressed, and a laminate with a pressure-sensitive adhesive layer, a polarizing plate, and an image display device which use the laminate. The laminate includes a first optically anisotropic layer; and a second optically anisotropic layer, the first optically anisotropic layer and the second optically anisotropic layer being laminated directly or through an alignment film, in which the first optically anisotropic layer satisfies Expression (A) nx>ny, the second optically anisotropic layer satisfies Expression (B) nx<nz, the laminate satisfies Expressions (1) 100 nm?Re(550)?180 nm, Expression (2) Re(450)/Re(550)<1.0, Expression (3) Re(650)/Re(550)>1.0, Expression (4) ?40 nm?Rth(550)?70 nm, and Expression (5) Rth(550)<Re(550)/2, and an endothermic peak temperature of the laminate observed by differential scanning calorimetry is 125° C. or lower.Type: ApplicationFiled: October 17, 2023Publication date: March 14, 2024Applicant: FUJIFILM CorporationInventors: Jun ISHIYAMA, Kunihiro ATSUMI, Ayako MURAMATSU
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Publication number: 20240056102Abstract: A decoding device includes a memory and a processor configured to execute inputting a code word encoded by a polar code from an original message; decoding the original message from the code word based on a conditional probability expressed by a symmetric parameterization and having observation information as a condition; and outputting the decoded original message.Type: ApplicationFiled: January 4, 2021Publication date: February 15, 2024Inventor: Jun MURAMATSU
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Publication number: 20230326309Abstract: In order to facilitate fixed-point monitoring over a wide area and for a long time, this water area monitoring device comprises: a detection unit for information, such as water area intrusion, which detects, from sound data that is acquired by means of optical fibers installed in the water or the water bottom and is data pertaining to a sound or a vibration at the respective positions of the optical fibers, at least any one among sounds of water area intrusion or the like that indicate intrusion into a target water area or water area intrusion or the like, which is a prescribed behavior in the target water area, at a time at which sound data is acquired, and changes in sounds or vibrations not caused by the water area intrusion or the like; and an output unit which outputs information indicating the sound such as water area intrusion.Type: ApplicationFiled: July 14, 2021Publication date: October 12, 2023Applicant: NEC CorporationInventors: Yutaka Yano, Eitaro Misumi, Kenichi Nomura, Makoto Ogawa, Jun Muramatsu, Masaki Nakano
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Publication number: 20220397451Abstract: An acoustic sensor that uses an optical fiber and has a high directivity is provided. An acoustic sensor includes a sensing part and an interrogator. The sensing part has a sensing element composed of an optical fiber. The interrogator is connected to the sensing part, sends a pulse light P to the sensing part, and detects an acoustic wave sensed by the sensing part based on a reflected return light from the sensing part. The sensing element is composed of the optical fiber folded in such a way that it reciprocates a plurality of number of times along a directivity direction in which directional sensitivity is exhibited.Type: ApplicationFiled: September 14, 2020Publication date: December 15, 2022Applicant: NEC CorporationInventors: Yutaka YANO, Eitaro MISUMI, Jun MURAMATSU
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Patent number: 7276811Abstract: A submarine power feeding branching device comprises a constant current-constant current converter which isolates an input side for a trunk submarine cable from an output side for a branch submarine cable. The converter receives a first constant current and produces a second constant current by using the first constant current. The second constant current is supplied to the output side while the first constant current is returned to the input side. Because the input side and the output side are isolated, it is easy to add/remove the device to/from a submarine power feeding system. Intensity of the second constant current can be controlled by controlling duty ratios of switches included in the converter. Thus, it is possible that the intensity of the second constant current is equal to that of the first constant current. Therefore, a submarine repeater can be provided along either the trunk cable or the branch cable.Type: GrantFiled: November 29, 2006Date of Patent: October 2, 2007Assignees: NEC Corporation, Independent Administrative Intitiution, Japan Agency for Marine-Earth Science and TechnologyInventors: Jun Muramatsu, Kenichi Asakawa, Katsuyoshi Kawaguchi
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Publication number: 20070069588Abstract: A submarine power feeding branching device comprises a constant current-constant current converter which isolates an input side for a trunk submarine cable from an output side for a branch submarine cable. The converter receives a first constant current and produces a second constant current by using the first constant current. The second constant current is supplied to the output side while the first constant current is returned to the input side. Because the input side and the output side are isolated, it is easy to add/remove the device to/from a submarine power feeding system. Intensity of the second constant current can be controlled by controlling duty ratios of switches included in the converter. Thus, it is possible that the intensity of the second constant current is equal to that of the first constant current. Therefore, a submarine repeater can be provided along either the trunk cable or the branch cable.Type: ApplicationFiled: November 29, 2006Publication date: March 29, 2007Inventors: Jun Muramatsu, Kenichi Asakawa, Katsuyoshi Kawaguchi
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Patent number: 7166933Abstract: A submarine power feeding branching device comprises a constant current-constant current converter which isolates an input side for a trunk submarine cable from an output side for a branch submarine cable. The converter receives a first constant current and produces a second constant current by using the first constant current. The second constant current is supplied to the output side while the first constant current is returned to the input side. Because the input side and the output side are isolated, it is easy to add/remove the device to/from a submarine power feeding system. Intensity of the second constant current can be controlled by controlling duty ratios of switches included in the converter. Thus, it is possible that the intensity of the second constant current is equal to that of the first constant current. Therefore, a submarine repeater can be provided along either the trunk cable or the branch cable.Type: GrantFiled: October 20, 2003Date of Patent: January 23, 2007Assignees: NEC Corporation, Independent Administrative Institution Japan Agency for Marine-Earth Science and TechnologyInventors: Jun Muramatsu, Kenichi Asakawa, Katsuyoshi Kawaguchi
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Patent number: 7102257Abstract: A submarine cable power feeding system includes N (N is an integer of 2 or larger) main submarine cables extending from the land in the offshore direction, N-stage (N is an integer of 2 or larger) submarine feed branching devices, and first to Nth (N is an integer of 2 or larger) sub submarine cables. Each submarine feed branching device is connected to the main submarine cable to receive constant-voltage power from a constant-voltage feed unit. Each sub submarine cable connects the Nth-stage submarine feed branching device, connected to the Nth main submarine cable, to the adjacent submarine feed branching device through submarine repeaters, thereby receiving power from a constant-current feed unit. Each constant-current feed unit is built in the submarine feed branching device. The submarine feed branching devices and the submarine repeaters are arranged in a matrix on a plane.Type: GrantFiled: February 13, 2003Date of Patent: September 5, 2006Assignees: NEC Corporation, Japan Marine Science and Technology CenterInventors: Jun Muramatsu, Katsuyoshi Kawaguchi, Kenichi Asakawa
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Publication number: 20040130215Abstract: A submarine power feeding branching device comprises a constant current-constant current converter which isolates an input side for a trunk submarine cable from an output side for a branch submarine cable. The converter receives a first constant current and produces a second constant current by using the first constant current. The second constant current is supplied to the output side while the first constant current is returned to the input side. Because the input side and the output side are isolated, it is easy to add/remove the device to/from a submarine power feeding system. Intensity of the second constant current can be controlled by controlling duty ratios of switches included in the converter. Thus, it is possible that the intensity of the second constant current is equal to that of the first constant current. Therefore, a submarine repeater can be provided along either the trunk cable or the branch cable.Type: ApplicationFiled: October 20, 2003Publication date: July 8, 2004Applicant: NEC CORPORATION and JAPAN MARINE SCIENCE AND TECHNOLOGY CENTERInventors: Jun Muramatsu, Kenichi Asakawa, Katsuyoshi Kawaguchi
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Publication number: 20030230936Abstract: A submarine cable power feeding system includes N (N is an integer of 2 or larger) main submarine cables extending from the land in the offshore direction, N-stage (N is an integer of 2 or larger) submarine feed branching devices, and first to Nth (N is an integer of 2 or larger) sub submarine cables. Each submarine feed branching device is connected to the main submarine cable to receive constant-voltage power from a constant-voltage feed unit. Each sub submarine cable connects the Nth-stage submarine feed branching device, connected to the Nth main submarine cable, to the adjacent submarine feed branching device through submarine repeaters, thereby receiving power from a constant-current feed unit. Each constant-current feed unit is built in the submarine feed branching device. The submarine feed branching devices and the submarine repeaters are arranged in a matrix on a plane.Type: ApplicationFiled: February 13, 2003Publication date: December 18, 2003Applicants: NEC CORPORATION, JAPAN MARINE SCIENCE AND TECHNOLOGY CENTERInventors: Jun Muramatsu, Katsuyoshi Kawaguchi, Kenichi Asakawa
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Patent number: 5726868Abstract: A robbery-proof mechanism for a vehicle mounted electronic apparatus wherein a cover for covering the electronic apparatus is accommodated in the upper space of the electronic apparatus and can be driven by a small scale drive mechanism without moving the electronic apparatus.Type: GrantFiled: December 20, 1995Date of Patent: March 10, 1998Assignee: Kabushiki Kaisha KenwoodInventors: Kazuya Koyama, Masayoshi Aoki, Jun Muramatsu, Tohru Masumoto, Masami Matsumoto, Kiyoshi Hosoi