Patents by Inventor Akira Kitayama
Akira Kitayama 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: 20200200888Abstract: The present invention minimizes the overall area occupied by a reception antenna while preventing erroneous detections resulting from azimuth aliasing. A reception antenna includes antenna elements that are disposed along the horizontal direction, antenna elements that are disposed along the vertical direction, and an antenna element that is disposed at an angle from the antenna elements with respect to the horizontal direction and is disposed at an angle from the antenna elements with respect to the vertical direction. The distance between the centers of the antenna elements in the horizontal direction differs from the distances between the center of the antenna element and the respective centers of the antenna elements in the horizontal direction. The distance between the centers of the antenna elements in the vertical direction differs from the distances between the center of the antenna element and the respective centers of the antenna elements in the vertical direction.Type: ApplicationFiled: September 14, 2018Publication date: June 25, 2020Inventors: Katsumi OUCHI, Akira KITAYAMA, Hiroshi KURODA
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Publication number: 20200057135Abstract: The present invention provides a radar device capable of reducing processing load while arraying receiving antennas in two directions. In the present invention, a transmitting unit (transmitting antenna) transmits an electromagnetic wave. A plurality of receiving antennas 108 receive a reflected wave from an object which reflects the electromagnetic wave, and convert the reflected wave into a first signal Sig1. A plurality of receiving circuits 520 are respectively connected to the receiving antennas 108 and generate a second signal Sig2 from the first signal Sig1. A signal processing unit 103 processes the second signal Sig2. The plurality of receiving antennas 108 are arrayed in a first direction and a second direction crossing the first direction.Type: ApplicationFiled: November 17, 2017Publication date: February 20, 2020Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Satoshi SASAKI, Akira KITAYAMA, Hiroshi KURODA
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Publication number: 20190377077Abstract: The present invention realizes stable operation of a radar device even if there is radio wave interference between multiple radar devices. A radar device 108 is provided with the following: an oscillator 105 that generates a modulated signal that has undergone frequency modulation; a transmission unit 103 that emits a transmission signal that has undergone frequency modulation during a prescribed modulation operation period using the modulated signal generated by the oscillator 105; a reception unit 104 that receives a reception signal which is the transmission signal that has been reflected off of an object in the area; and a signal processing unit 106.Type: ApplicationFiled: March 16, 2018Publication date: December 12, 2019Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Akira KITAYAMA, Hiroshi KURODA
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Publication number: 20190310345Abstract: The present invention is an antenna provided with: a plurality of radiating parts formed on a base plate; a waveguide tube inside of which radio waves emitted from the radiating parts propagate; a lens having a plurality of curved surfaces having a substantially hyperbolic shape and disposed in an opening of the waveguide tube; and a protruding part formed in a tapered shape between the plurality of radiating parts. The tip of the protruding part is formed at a position lower than an opening surface.Type: ApplicationFiled: August 3, 2017Publication date: October 10, 2019Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Hideyuki NAGAISHI, Akira KURIYAMA, Akira KITAYAMA, Hiroshi KURODA
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Patent number: 8665681Abstract: There is provided an optical disc drive comprises an optical pick-up including a laser diode (LD) and a laser diode driver (LDD) for driving the laser diode, a digital signal processor (DSP) including a write strategy circuit and low voltage differential signaling (LVDS) drivers for transmitting a produced write strategy signal, a circuit board having the DSP mounted thereon and including a line for transmitting the write strategy signal, a transmission line connecting the circuit board and the LDD and transmitting a write strategy signal, and differential resistors connected between differential lines of outputs of the LVDS drivers. Especially, a resistor having a resistance value in a range of 80 to 500? is inserted between the differential lines of outputs of the LVDS driver inside the DSP.Type: GrantFiled: October 15, 2008Date of Patent: March 4, 2014Assignee: Hitachi-Lg Data Storage, Inc.Inventors: Akira Kitayama, Tatemi Ido, Nobuaki Sato, Hiroharu Sakai, Kouichi Ihara
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Patent number: 8477589Abstract: A optical pickup includes: a laser diode; a driver including a first output end of a laser diode drive current; a first line electrically connected to the first output end of the driver and a first port of the laser diode; a second line provided adjacent to the signal line at at least one location or more and electrically connected to a second port of the laser diode; a printed circuit board including the first and second lines; and a metal heat dissipation cover for the driver. The first and second lines form a two layer structure in which the first and second lines are vertically disposed. The line width of the line provided close to the heat dissipation cover is wider than the line width of the other line between the first and second lines in the two layer structure.Type: GrantFiled: October 25, 2012Date of Patent: July 2, 2013Assignees: Hitachi Consumer Electronics, Co., Ltd., Hitachi-LG Data Storage, Inc.Inventors: Akira Kitayama, Toshimitsu Kaku, Kazuhide Hamada
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Patent number: 8448196Abstract: An electronic device including a mechanism for changing the relative positions of two circuit boards such as in an optical disc drive is provided. A flexible printed circuit electrically connected between the two circuit boards changes shape to suppress fluctuations in the transmission characteristics occurring due to contact with metal such as a case, and provides stable signal transmission. The flexible printed circuit includes at least one or more differential lines, a fixed unit affixed to a case at least at one location, and a movable unit that changes shape according to the relative positions of two cases. The lines adjacent to the differential line are a grounded surface, and the flexible printed circuit is formed to narrow the distance between the movable unit lines more than the distance between the fixed unit lines.Type: GrantFiled: November 16, 2010Date of Patent: May 21, 2013Assignees: Hitachi Consumer Electronics Co., Ltd., Hitachi—LG Data Storage, Inc.Inventors: Akira Kitayama, Kouichi Ihara, Kenji Takahashi, Tatemi Ido
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Patent number: 8305869Abstract: Bandwidth is secured for a read signal transmission line by matching the characteristic impedance of the read signal transmission line with the output impedance of a photodetector of an optical pick up, while at the same time securing bandwidth for the photodetector. In an optical disc drive according to an embodiment of the present invention, each line forming a differential transmission line is divided into a plurality of lines of the same quantity, the quantity being two or more, at or near a connection point between a flexible line and the optical pick up.Type: GrantFiled: June 6, 2011Date of Patent: November 6, 2012Assignees: Hitachi-LG Data Storage, Inc., Hitachi Consumer Electronics Co., Ltd.Inventors: Akira Kitayama, Toshimitsu Kaku, Hajime Nishimura
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Publication number: 20120044795Abstract: Bandwidth is secured for a read signal transmission line by matching the characteristic impedance of the read signal transmission line with the output impedance of a photodetector of an optical pick up, while at the same time securing bandwidth for the photodetector. In an optical disc drive according to an embodiment of the present invention, each line forming a differential transmission line is divided into a plurality of lines of the same quantity, the quantity being two or more, at or near a connection point between a flexible line and the optical pick up.Type: ApplicationFiled: June 6, 2011Publication date: February 23, 2012Applicants: Hitachi Consumer Electronics Co., Ltd., Hitachi-LG Data Storage, Inc.Inventors: Akira KITAYAMA, Toshimitsu Kaku, Hajime Nishimura
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Publication number: 20110126221Abstract: A electronic device including a mechanism for changing the relative positions of two circuit boards such as in an optical disc drive, in which a flexible printed circuit electrically connecting between the two circuit board changes shape to suppress fluctuations in the transmission characteristics occurring due to contact with metal such as a case, and provides stable signal transmission. A flexible printed circuit is comprised of at least one or more differential lines, a fixed unit affixed to a case at least at one location, a movable unit that changes shape according to the relative positions of two case. The lines adjacent to the differential line are a grounded surface, and the flexible printed circuit is formed to narrow the distance between the movable unit lines more than the distance between the fixed unit lines.Type: ApplicationFiled: November 16, 2010Publication date: May 26, 2011Applicants: Hitachi Consumer Electronics Co., Ltd., Hitachi - LG Data Storage, Inc.Inventors: Akira Kitayama, Kouichi Ihara, Kenji Takahashi, Tatemi Ido
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Publication number: 20090103406Abstract: There is provided an optical disc drive comprises an optical pick-up including a laser diode (LD) and a laser diode driver (LDD) for driving the laser diode, a digital signal processor (DSP) including a write strategy circuit and low voltage differential signaling (LVDS) drivers for transmitting a produced write strategy signal, a circuit board having the DSP mounted thereon and including a line for transmitting the write strategy signal, a transmission line connecting the circuit board and the LDD and transmitting a write strategy signal, and differential resistors connected between differential lines of outputs of the LVDS drivers. Especially, a resistor having a resistance value in a range of 80 to 500? is inserted between the differential lines of outputs of the LVDS driver inside the DSP.Type: ApplicationFiled: October 15, 2008Publication date: April 23, 2009Inventors: Akira Kitayama, Tatemi Ido, Nobuaki Sato, Hiroharu Sakai, Kouichi Ihara
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Patent number: 4218428Abstract: A process for removing chlorine ions from wet flue-gas processing system.According to the process of this invention, the accumulation of the chlorine ions in the processing system is sufficiently prevented, and thus the corrosion of the apparatus is efficiently avoided.Type: GrantFiled: February 1, 1979Date of Patent: August 19, 1980Assignee: Idemitsu Kosan Company LimitedInventors: Yuichi Etoh, Akira Kitayama, Sadami Kobayashi, Shigeyoshi Okazaki