Patents by Inventor Shuji Naka
Shuji Naka 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: 11656582Abstract: A radio wave watch includes: an exterior case; a dial plate disposed within the exterior case; a substrate disposed on a rear side of the dial plate within the exterior case; a first ground layer disposed on the substrate; an antenna that has a planar emitting electrode disposed between a center of the exterior case and an inner wall surface of the exterior case and opposed to the first ground layer, a planar short-circuit part electrically connecting an end part of the emitting electrode to the first ground layer, and a connecting part connecting the emitting electrode to a receiving circuit of the substrate; and a second ground layer disposed on an opposite side to the emission electrode side across the short-circuit part on the substrate and having a width equal to or greater than a width of the short-circuit part.Type: GrantFiled: September 18, 2018Date of Patent: May 23, 2023Assignee: CITIZEN WATCH CO., LTD.Inventors: Yoshiyasu Watanabe, Ken Kitamura, Shuji Naka, Akira Kato
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Patent number: 11150612Abstract: A portable radio-controlled watch includes a watch glass, an antenna that is formed on a backside of a circumference of the watch glass so as to be along the circumference, a feeder electrode adjacent to the antenna, a receiving circuit, an antenna connecting line that is at least a part of a connection circuit connecting the feeder electrode with the receiving circuit, where the antenna connecting line is directly connected to a back surface of the feeder electrode and extends in a direction away from the watch glass, and a dielectric that is disposed below the antenna and covers at least a part of the antenna in a plan view.Type: GrantFiled: July 20, 2017Date of Patent: October 19, 2021Assignee: CITIZEN WATCH CO., LTD.Inventors: Shuji Naka, Ken Kitamura, Akira Kato, Yohsuke Noma
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Publication number: 20200319605Abstract: A radio wave watch includes: an exterior case; a dial plate disposed within the exterior case; a substrate disposed on a rear side of the dial plate within the exterior case; a first ground layer disposed on the substrate; an antenna that has a planar emitting electrode disposed between a center of the exterior case and an inner wall surface of the exterior case and opposed to the first ground layer, a planar short-circuit part electrically connecting an end part of the emitting electrode to the first ground layer, and a connecting part connecting the emitting electrode to a receiving circuit of the substrate; and a second ground layer disposed on an opposite side to the emission electrode side across the short-circuit part on the substrate and having a width equal to or greater than a width of the short-circuit part.Type: ApplicationFiled: September 18, 2018Publication date: October 8, 2020Applicant: CITIZEN WATCH CO., LTD.Inventors: Yoshiyasu WATANABE, Ken KITAMURA, Shuji NAKA, Akira KATO
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Publication number: 20200301371Abstract: Provided is a portable radio-controlled watch including: an antenna electrode; a receiving circuit arranged on a circuit board; a pair of connection pins, each of which has one end contacting the antenna electrode, and which are arranged in parallel to each other; intermediate wiring, which is connected to another end of each of the pair of connection pins, and extends in a direction separating from a case body; and RF connection wiring, which connects the intermediate wiring and the receiving circuit to each other.Type: ApplicationFiled: March 16, 2017Publication date: September 24, 2020Inventors: Ken KITAMURA, Akira KATO, Shuji NAKA, Yohsuke NOMA
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Publication number: 20200089170Abstract: Provided is a highly sensitive radio-controlled watch which includes: a watch glass; a case into which the watch glass is fitted; a movement disposed inside the case; and an antenna body disposed between the watch glass and the movement, and also along an inner periphery of the case, the antenna body including: an antenna electrode; and an antenna base having a surface on which the antenna electrode is disposed, and the antenna base having a permittivity higher than a permittivity of other components around the antenna body.Type: ApplicationFiled: March 13, 2018Publication date: March 19, 2020Inventors: Ken KITAMURA, Shuji NAKA, Akira KATO, Yoshiyasu WATANABE
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Publication number: 20190265655Abstract: A portable radio-controlled watch includes a watch glass, an antenna that is formed on a backside of a circumference of the watch glass so as to be along the circumference, a feeder electrode adjacent to the antenna, a receiving circuit, an antenna connecting line that is at least a part of a connection circuit connecting the feeder electrode with the receiving circuit, where the antenna connecting line is directly connected to a back surface of the feeder electrode and extends in a direction away from the watch glass, and a dielectric that is disposed below the antenna and covers at least a part of the antenna in a plan view.Type: ApplicationFiled: July 20, 2017Publication date: August 29, 2019Inventors: Shuji NAKA, Ken KITAMURA, Akira KATO, Yohsuke NOMA
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Publication number: 20190094817Abstract: A portable radio-controlled watch includes a watch glass, an antenna electrode that is formed on a backside of a peripheral edge of the watch glass so as to be along the peripheral edge, a receiving circuit, an antenna connecting line that is at least a part of a connection circuit connecting the antenna electrode with the receiving circuit, the antenna connecting line being directly connected to a back surface of the antenna electrode and extending in a direction away from the watch glass, and a dielectric that is disposed below the antenna electrode and covers at least a part of the antenna electrode in a plan view.Type: ApplicationFiled: March 16, 2017Publication date: March 28, 2019Inventors: Ken KITAMURA, Akira KATO, Shuji NAKA, Yohsuke NOMA
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Patent number: 8451421Abstract: The present invention is directed to the provision of an optical pickup apparatus in which a liquid crystal optical element constructed by combining an aberration correcting liquid crystal panel and an n?/4 liquid crystal panel in an integral fashion is mounted in a tilted position.Type: GrantFiled: February 16, 2007Date of Patent: May 28, 2013Assignee: Citizen Holdings Co., Ltd.Inventors: Shuji Naka, Shinya Sato
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Patent number: 8098352Abstract: The present invention is directed to the provision of an optical pickup apparatus in which a liquid crystal optical element constructed by combining an aberration correcting liquid crystal panel and a ?/4 liquid crystal panel in an integral fashion is mounted in a tilted position. More particularly, the invention provides a liquid crystal optical element comprising a first liquid crystal layer for correcting aberration, a second liquid crystal layer functioning as an n?/4 plate and combined in an integral fashion with the first liquid crystal layer, a transparent electrode for generating a potential difference on the second liquid crystal layer in order to control an amount of phase difference for the light beam passing through the second liquid crystal layer, and a driver for driving the transparent electrode so as to generate a potential difference that is the lowest among a plurality of potential differences that cause the second liquid crystal layer to function as an n?/4 plate.Type: GrantFiled: March 5, 2007Date of Patent: January 17, 2012Assignee: Citizen Holdings Co., Ltd.Inventors: Naoki Fujii, Shuji Naka, Yoshiharu Takane
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Publication number: 20090167965Abstract: The present invention is directed to the provision of an optical pickup apparatus in which a liquid crystal optical element constructed by combining an aberration correcting liquid crystal panel and an n?/4 liquid crystal panel in an integral fashion is mounted in a tilted position.Type: ApplicationFiled: February 16, 2007Publication date: July 2, 2009Inventors: Shuji Naka, Shinya Sato
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Publication number: 20070211185Abstract: The present invention is directed to the provision of an optical pickup apparatus in which a liquid crystal optical element constructed by combining an aberration correcting liquid crystal panel and a ?/4 liquid crystal panel in an integral fashion is mounted in a tilted position. More particularly, the invention provides a liquid crystal optical element comprising a first liquid crystal layer for correcting aberration, a second liquid crystal layer functioning as an n?/4 plate and combined in an integral fashion with the first liquid crystal layer, a transparent electrode for generating a potential difference on the second liquid crystal layer in order to control an amount of phase difference for the light beam passing through the second liquid crystal layer, and a driver for driving the transparent electrode so as to generate a potential difference that is the lowest among a plurality of potential differences that cause the second liquid crystal layer to function as an n?/4 plate.Type: ApplicationFiled: March 5, 2007Publication date: September 13, 2007Inventors: Naoki Fujii, Shuji Naka, Yoshiharu Takane