Patents by Inventor Masao Karue

Masao Karue 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).

  • Signal amplifier circuit load drive circuit and liquid crystal display device
    Patent number: 6603456
    Abstract: A differential voltage between the threshold voltage of an amplitude amplifying logic circuit 20 and a reference voltage V1 is stored in a capacitor C1. When an input signal IS is input to the amplitude amplifying logic circuit 20, it is input after adding to the voltage of the input signal IS the voltage stored in the capacitor C1. In this manner, any difference between the threshold voltage V1 of the amplitude amplifying logic circuit 20 and the reference voltage can be absorbed. Therefore, a signal amplifier circuit can operate normally even when the threshold voltage of the amplitude amplifying logic circuit 20 in the signal amplifier circuit varies.
    Type: Grant
    Filed: November 4, 1999
    Date of Patent: August 5, 2003
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshiro Aoki, Masao Karue