Patents by Inventor Toshiaki Ioi

Toshiaki Ioi 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).

  • Phase detection device, dial type detection device, and phase detection method
    Patent number: 6911820
    Abstract: A phase detection device with low power consumption capable of accurately detecting that an object has moved, and returning from an intermittent energized mode to an always energized mode is provided.
    Type: Grant
    Filed: September 19, 2003
    Date of Patent: June 28, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Toshiaki Ioi
  • Phase detection device, dial type detection device, and phase detection method
    Publication number: 20040119506
    Abstract: A phase detection device with low power consumption capable of accurately detecting that an object has moved, and returning from an intermittent energized mode to an always energized mode is provided.
    Type: Application
    Filed: September 19, 2003
    Publication date: June 24, 2004
    Inventor: Toshiaki Ioi
  • Video signal processing apparatus
    Patent number: 5122869
    Abstract: A video signal processing apparatus has a phase-locked loop which includes a quartz resonator, a voltage-controlled oscillator connected to the quartz resonator and oscillating at an oscillation frequency whose fundamental value is determined by the quartz resonator, and a horizontal sync signal lock circuit comparing a phase of a horizontal sync signal and a phase of an output signal from the voltage-controlled oscillator and controlling the oscillation frequency of the voltage-controlled oscillator in response to a difference between the phases of the horizontal sync signal and the output signal from the voltage-controlled oscillator. The video signal processing apparatus also has a device for modulating a video signal by use of the output signal from the voltage-controlled oscillator.
    Type: Grant
    Filed: December 7, 1990
    Date of Patent: June 16, 1992
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Norihide Kinugasa, Hikaru Masui, Yoshimitsu Saka, Koichi Yoshimura, Toshiaki Ioi, Narutoshi Kanazawa