Patents by Inventor Tetsuhito Ikeda

Tetsuhito Ikeda 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).

  • Charge control apparatus and electronic apparatus provided with such a control apparatus
    Patent number: 5565757
    Abstract: A control signal is outputted from a CPU in a predetermined period to a one-shot circuit. An output signal of the one-shot circuit is maintained at a predetermined level, as far as the control signal is supplied to the one-shot circuit in the predetermined period. The output signal of the one-shot circuit is applied to a charging circuit for a battery. The charging circuit performs a charge operation for the battery while a predetermined level of the output signal of the one-shot circuit being kept on.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: October 15, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tetsuhito Ikeda, Junichi Arakawa, Hideo Horigome, Yuichi Kaneko, Akira Kuribayashi
  • Charge control apparatus and electronic apparatus provided with such a control apparatus
    Patent number: 5448153
    Abstract: A control signal is outputted from a CPU in a predetermined period to a one-shot circuit. An output signal of the one-shot circuit is maintained at a predetermined level, as far as the control signal is supplied to the one-shot circuit in the predetermined period. The output signal of the one-shot circuit is applied to a charging circuit for a battery. The charging circuit performs a charge operation for the battery while a predetermined level of the output signal of the one-shot circuit being kept on.
    Type: Grant
    Filed: March 26, 1993
    Date of Patent: September 5, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tetsuhito Ikeda, Junichi Arakawa, Hideo Horigome, Yuichi Kaneko, Akira Kuribayashi
  • Photodetector for hologram-type optical head including means for detecting return light spot deviation
    Patent number: 5001334
    Abstract: A photodetector for a hologram-type optical head comprises, as a basic constitution, 6-piece-divided photodiodes. In order to prevent the photodetector from receiving the influence of wavelength variation of a laser diode, that is, spot deviations, one photodiode is divided into two small elements and the spot deviation is detected by utilizing the difference between outputs of the two small elements.
    Type: Grant
    Filed: August 30, 1988
    Date of Patent: March 19, 1991
    Assignee: NEC Home Electronics Ltd.
    Inventor: Tetsuhito Ikeda