Patents by Inventor Tetsuya Minamiguchi

Tetsuya Minamiguchi 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).

  • Offset adjustment device, semiconductor device, display device, offset adjustment method, noise detection device, and noise detection method
    Patent number: 7659777
    Abstract: In one embodiment of the present invention, an operational amplifier circuit, a switching element is closed and a switching element is opened. A latch circuit DL latches an output voltage of an operational amplifier and supplies a Q output corresponding to the output voltage. A control circuit supplies an offset adjustment signal to an offset adjustment input terminal OR of the operational amplifier, thereby adjusting an offset of the output voltage. The latch circuit DL latches again the output voltage thus adjusted and minutely adjusts the offset adjustment signal so as to adjust the remaining offset. Weighting is carried out in accordance with how many times latching has been carried out, and the offset of the output voltage of the operational amplifier is quantized, thereby obtaining a binary logical signal and storing the signal in the control circuit.
    Type: Grant
    Filed: August 3, 2007
    Date of Patent: February 9, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroaki Fujino, Tetsuya Minamiguchi, Michihiro Nakahara, Takahiro Nakai, Tomoaki Nakao
  • Offset adjustment device, semiconductor device, display device, offset adjustment method, noise detection device, and noise detection method
    Publication number: 20080246544
    Abstract: In one embodiment of the present invention, an operational amplifier circuit, a switching element is closed and a switching element is opened. A latch circuit DL latches an output voltage of an operational amplifier and supplies a Q output corresponding to the output voltage. A control circuit supplies an offset adjustment signal to an offset adjustment input terminal OR of the operational amplifier, thereby adjusting an offset of the output voltage. The latch circuit DL latches again the output voltage thus adjusted and minutely adjusts the offset adjustment signal so as to adjust the remaining offset. Weighting is carried out in accordance with how many times latching has been carried out, and the offset of the output voltage of the operational amplifier is quantized, thereby obtaining a binary logical signal and storing the signal in the control circuit.
    Type: Application
    Filed: August 3, 2007
    Publication date: October 9, 2008
    Inventors: Hiroaki Fujino, Tetsuya Minamiguchi, Michihiro Nakahara, Takahiro Nakai, Tomoaki Nakao
  • Injection molding machine for making a worm wheel
    Patent number: 6638054
    Abstract: The invention relates to a worm wheel for use in a reduction gear, for example, and to a machine and a method for forming the same. The worm wheel includes a tooth having a tooth crest. At least the teeth are formed by injection molding a synthetic resin. The tooth crest includes a trace formed along a parting line as a result of the injection molding process. The trace does not exist on a surface of action of the tooth. The invention is suitable for applications demanding high contact gear accuracies.
    Type: Grant
    Filed: December 26, 2001
    Date of Patent: October 28, 2003
    Assignees: Koyo Seiko Co., Ltd., Fukui Seiki Kogyo Co., Ltd.
    Inventors: Kikuo Yamashita, Tetsuya Minamiguchi, Takanori Kurokawa, Michitoshi Mitsumaru
  • Worm wheel and machine and method for forming the same
    Publication number: 20020078776
    Abstract: The invention relates to a worm wheel for use in a reduction gear, for example, and to a machine and a method for forming the same. The worm wheel includes a tooth having a tooth crest. At least the teeth are formed by injection molding a synthetic resin. The tooth crest includes a trace formed along a parting line as a result of the injection molding process. The trace does not exist on a surface of action of the tooth. The invention is suitable for applications demanding high contact gear accuracies.
    Type: Application
    Filed: December 26, 2001
    Publication date: June 27, 2002
    Inventors: Kikuo Yamashita, Tetsuya Minamiguchi, Takanori Kurokawa, Michitoshi Mitsumaru