Patents by Inventor Mitsugi Ootsuka

Mitsugi Ootsuka 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).

  • Patent number: 8102241
    Abstract: When a demodulated signal of a radio signal in Ch1 transmitted from a TPMS transmitter is acquired, a control IC controls the frequency of a signal inputted from a PLL circuit to a mixer into a frequency for converting a TPMS radio signal into an intermediate frequency signal of a specific frequency. When the demodulated signal of the radio signal transmitted from a portable unit through two frequency channels is acquired, the control IC determines a channel whose state of communication is favorable from between Ch2 and Ch3, and controls the signal frequency for conversion into a frequency for converting a keyless radio signal in the determined channel into an intermediate frequency signal.
    Type: Grant
    Filed: August 17, 2007
    Date of Patent: January 24, 2012
    Assignee: Denso Corporation
    Inventors: Noriaki Okada, Hironori Katoh, Hiromichi Naitoh, Munenori Matsumoto, Masahiro Sugiura, Mitsugi Ootsuka, Akihiro Taguchi
  • Patent number: 7629876
    Abstract: A wireless key includes a receiver circuit that operates with a built-in battery, and receives a polling radio wave for wireless key search and authentication from a vehicle, and a transmitter circuit that transmits a lock operation radio wave to a door based on the manipulation on a manipulation device. The wireless key is capable of changing over operation mode between a power saving mode that permits the operation of transmitting the lock operation radio wave by the transmitter circuit and stops the operation of receiving the polling radio wave by the receiving circuit, and a full power mode that permits the operation of transmitting the lock operation radio wave by the transmitter circuit and continues the reception by the receiver circuit.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: December 8, 2009
    Assignee: Denso Corporation
    Inventors: Nobuyoshi Nagai, Mitsugi Ootsuka
  • Publication number: 20080088409
    Abstract: A smart portable device transmits a keyless radio signal for a keyless entry system by two frequency channels. In an integrated tuner, a control IC determines a frequency channel having a better communication state, and controls a frequency of a signal that is input to a mixer from a PLL circuit to a frequency for converting the keyless radio signal of the determined frequency channel into an intermediate frequency signal. This configuration makes it possible to share a circuit for receiving the keyless radio signals of those two frequency channels, and to receive the keyless radio signal of the frequency channel having the better communication state to surely conduct communication.
    Type: Application
    Filed: October 12, 2007
    Publication date: April 17, 2008
    Applicant: DENSO CORPORATION
    Inventors: Noriaki Okada, Hiromichi Naitoh, Munenori Matsumoto, Mitsugi Ootsuka
  • Publication number: 20080055042
    Abstract: When a demodulated signal of a radio signal in Ch1 transmitted from a TPMS transmitter is acquired, a control IC controls the frequency of a signal inputted from a PLL circuit to a mixer into a frequency for converting a TPMS radio signal into an intermediate frequency signal of a specific frequency. When the demodulated signal of the radio signal transmitted from a portable unit through two frequency channels is acquired, the control IC determines a channel whose state of communication is favorable from between Ch2 and Ch3, and controls the signal frequency for conversion into a frequency for converting a keyless radio signal in the determined channel into an intermediate frequency signal.
    Type: Application
    Filed: August 17, 2007
    Publication date: March 6, 2008
    Applicant: DENSO CORPORATION
    Inventors: Noriaki Okada, Hironori Katoh, Hiromichi Naitoh, Munenori Matsumoto, Masahiro Sugiura, Mitsugi Ootsuka, Akihiro Taguchi
  • Publication number: 20080048846
    Abstract: A wireless key includes a receiver circuit that operates with a built-in battery, and receives a polling radio wave for wireless key search and authentication from a vehicle, and a transmitter circuit that transmits a lock operation radio wave to a door based on the manipulation on a manipulation device. The wireless key is capable of changing over operation mode between a power saving mode that permits the operation of transmitting the lock operation radio wave by the transmitter circuit and stops the operation of receiving the polling radio wave by the receiving circuit, and a full power mode that permits the operation of transmitting the lock operation radio wave by the transmitter circuit and continues the reception by the receiver circuit.
    Type: Application
    Filed: July 25, 2007
    Publication date: February 28, 2008
    Applicant: DENSO CORPORATION
    Inventors: Nobuyoshi Nagai, Mitsugi Ootsuka