Patents by Inventor Masahiro Gamou
Masahiro Gamou 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: 11615909Abstract: A coil component includes a first core having a leg portion, a second core joined to the first core with the leg portion therebetween, and a magnet disposed between the leg portion and the second core. Movement of the magnet in a first direction intersecting a direction in which the first core and the second core face each other is at least restricted by an uneven structure provided on a junction surface between the magnet and at least one of the first core and the second core.Type: GrantFiled: December 21, 2020Date of Patent: March 28, 2023Assignee: TDK CORPORATIONInventors: Ge Li, Masahiro Gamou
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Publication number: 20210193363Abstract: A coil component includes a first core having a leg portion, a second core joined to the first core with the leg portion therebetween, and a magnet disposed between the leg portion and the second core. Movement of the magnet in a first direction intersecting a direction in which the first core and the second core face each other is at least restricted by an uneven structure provided on a junction surface between the magnet and at least one of the first core and the second core.Type: ApplicationFiled: December 21, 2020Publication date: June 24, 2021Applicant: TDK CORPORATIONInventors: Ge LI, Masahiro GAMOU
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Patent number: 7205726Abstract: There are provided a discharge lamp drive apparatus which can detect that both ends of at least one of a plurality of discharge lamps is in an open state in a differential drive scheme, and a liquid crystal display apparatus. A first current detection circuit 31 detects a current flowing through a first discharge lamp connection terminal group P1 or a current flowing through a second discharge lamp connection terminal group P3, and generates a first current detection signal S1. A second current detection circuit 32 detects a current flowing through the second discharge lamp connection terminal group P2 or a current flowing through a fourth discharge lamp connection terminal group P4, and generates a second current detection signal S2. A signal processor 30 receives the first current detection signal S1 and the second current detection signal S2, and generates a signal S01 which is used to detect an open state of a discharge lamp based on intensities of both the current detection signals S1 and S2.Type: GrantFiled: October 27, 2005Date of Patent: April 17, 2007Assignee: TDK CorporationInventors: Hiroshi Maeda, Satoshi Shinbo, Masahiro Gamou, Satoshi Sugimoto, Nobuo Kitajima, Terumasa Toyoda
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Publication number: 20060103329Abstract: There are provided a discharge lamp drive apparatus which can detect that both ends of at least one of a plurality of discharge lamps is in an open state in a differential drive scheme, and a liquid crystal display apparatus. A first current detection circuit 31 detects a current flowing through a first discharge lamp connection terminal group P1 or a current flowing through a second discharge lamp connection terminal group P3, and generates a first current detection signal S1. A second current detection circuit 32 detects a current flowing through the second discharge lamp connection terminal group P2 or a current flowing through a fourth discharge lamp connection terminal group P4, and generates a second current detection signal S2. A signal processor 30 receives the first current detection signal S1 and the second current detection signal S2, and generates a signal S01 which is used to detect an open state of a discharge lamp based on intensities of both the current detection signals S1 and S2.Type: ApplicationFiled: October 27, 2005Publication date: May 18, 2006Applicant: TDK CORPORATIONInventors: Hiroshi Maeda, Satoshi Shinbo, Masahiro Gamou, Satoshi Sugimoto, Nobuo Kitajima, Terumasa Toyoda
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Publication number: 20060091819Abstract: The present invention is directed to a discharge lamp drive device and a liquid crystal display device, capable of keeping a tube current balance among discharge lamps to thereby prolong life durations of the discharge lamps. A drive circuit 311 outputs an AC voltage. Ballast circuits 312, 322 include ānā pieces of ballast capacitors C11 through C1n and C21 through C2n, respectively. The ballast capacitors C11 through C1n and C21 through C2n have one ends commonly connected to one another and directed to drive circuits 311 respectively, and other ends individually connected to discharge lamp connection terminals, respectively. Connected in parallel to at least two of ballast capacitors C11, C21, and C1n, C2n, are tube current compensation capacitors Cb3 and Cb1 thereby increasing capacitances of the ballast capacitors, respectively.Type: ApplicationFiled: August 16, 2005Publication date: May 4, 2006Applicant: TDK CorporationInventors: Ge Li, Masahiro Gamou, Hiroshi Maeda
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Patent number: 6847284Abstract: A planar coil includes a winding of N turns (N is an integer greater than or equal to 2). Letting ri(n) be a radius of an inner circumference of a winding portion at the nth turn (n is an integer greater than or equal to 1 and less than or equal to N) from the inner side; ro(n) be a radius of an outer circumference of the same; rmin be a radius of an inner circumference of the innermost winding portion; Wtotal be a difference between a radius of an outer circumference of the outermost winding portion and the radius of the inner circumference of the innermost winding portion; and D be a distance between winding portions at adjacent turns, the ri(n) and ro(n) are determined so as to minimize a value of A expressed by equation (1) when the rmin, Wtotla and D are given.Type: GrantFiled: February 28, 2002Date of Patent: January 25, 2005Assignee: TDK CorporationInventors: Masahiro Gamou, Satoshi Horikami
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Patent number: 6687143Abstract: A rectifying circuit having a pair of input terminals at which voltage having an AC waveform appears, a plurality of first rectifying elements 41, a plurality of second rectifying elements 42, a first wiring pattern 71 for connecting one of the paired input terminals to the plurality of first rectifying elements 41, and a second wiring pattern 72 for connecting the other of the paired input terminals to the plurality of second rectifying elements 42. In the rectifying circuit, the plurality of first rectifying elements 41 and the plurality of second rectifying elements 42 are laid out so that at least two boundaries between the first and second rectifying elements adjacent to each other are present. With such a layout of the rectifying elements, current flow paths between one of the input terminals and the plurality of first rectifying elements 41 and current flow paths between the other of the input terminals and the plurality of second rectifying elements 42, are closely disposed.Type: GrantFiled: August 16, 2002Date of Patent: February 3, 2004Assignee: TDK CorporationInventors: Junichi Yamamoto, Masakazu Takagi, Masahiro Gamou, Katsuhiko Shimizu
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Publication number: 20030179067Abstract: An object of the invention is to arrange a winding so as to minimize a loss in a limited space.Type: ApplicationFiled: December 10, 2002Publication date: September 25, 2003Inventors: Masahiro Gamou, Satoshi Horikami
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Publication number: 20030132825Abstract: An object of the invention is to reduce loss of a main winding by increasing the occupancy ratio of the area for accommodating the main winding conductor to the area for the entire conductors, and to attain a higher degree of flexibility in the number of turns of an auxiliary winding.Type: ApplicationFiled: December 10, 2002Publication date: July 17, 2003Inventor: Masahiro Gamou
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Publication number: 20030039133Abstract: A rectifying circuit having a pair of input terminals at which voltage having an AC waveform appears, a plurality of first rectifying elements 41, a plurality of second rectifying elements 42, a first wiring pattern 71 for connecting one of the paired input terminals to the plurality of first rectifying elements 41, and a second wiring pattern 72 for connecting the other of the paired input terminals to the plurality of second rectifying elements 42. In the rectifying circuit, the plurality of first rectifying elements 41 and the plurality of second rectifying elements 42 are laid out so that at least two boundaries between the first and second rectifying elements adjacent to each other are present. With such a layout of the rectifying elements, current flow paths between one of the input terminals and the plurality of first rectifying elements 41 and current flow paths between the other of the input terminals and the plurality of second rectifying elements 42, are closely disposed.Type: ApplicationFiled: August 16, 2002Publication date: February 27, 2003Applicant: TDK CORPORATIONInventors: Junichi Yamamoto, Masakazu Takagi, Masahiro Gamou, Katsuhiko Shimizu