Patents by Inventor Misao Kuramochi

Misao Kuramochi 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).

  • Light reception output controlling apparatus of photo detector in optical pickup unit
    Patent number: 7365296
    Abstract: In the optical pickup unit configured to guide a laser beam emitted from a laser source to an objective lens, to converge the laser beam with the objective lens to be irradiated to a disk, and to guide the laser beam reflected and returned by the disk to the photo detector including a light reception region constituted by a plurality of segments, the photo detector is disposed with each amplifier corresponding to each segment of the light reception region, is disposed with each output terminal that outputs each light reception output corresponding to each segment from the photo detector via each amplifier, and is disposed with an output setting circuit that sets each light reception output from each of the output terminals by changing the gain of each of the amplifiers and/or by attenuating the input or output of each of the amplifiers with an attenuator.
    Type: Grant
    Filed: June 29, 2006
    Date of Patent: April 29, 2008
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Akira Tsukihashi, Shigeru Nakamura, Misao Kuramochi, Mitsuhiro Hiruma, Michiyoshi Sawada, Hiromitsu Kondo
  • Light Reception Output Controlling Apparatus of Photo Detector in Optical Pickup Unit
    Publication number: 20070001092
    Abstract: In the optical pickup unit configured to guide a laser beam emitted from a laser source to an objective lens, to converge the laser beam with the objective lens to be irradiated to a disk, and to guide the laser beam reflected and returned by the disk to the photo detector including a light reception region constituted by a plurality of segments, the photo detector is disposed with each amplifier corresponding to each segment of the light reception region, is disposed with each output terminal that outputs each light reception output corresponding to each segment from the photo detector via each amplifier, and is disposed with an output setting circuit that sets each light reception output from each of the output terminals by changing the gain of each of the amplifiers and/or by attenuating the input or output of each of the amplifiers with an attenuator to correct each light reception output from each of the output terminals with the output setting circuit depending on an output difference generated in each
    Type: Application
    Filed: June 29, 2006
    Publication date: January 4, 2007
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Akira Tsukihashi, Shigeru Nakamura, Misao Kuramochi, Mitsuhiro Hiruma, Michiyoshi Sawada, Hiromitsu Kondo