Patents by Inventor Sunao Etou

Sunao Etou 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).

  • Patent number: 6172663
    Abstract: A driver circuit for driving a capacitive load has a first electrode and a second electrode. The driver circuit includes: a first charging section, connected with the first electrode, for applying a charge to the first electrode during a. first period and receiving a charge from the first electrode during a second period; a second charging section, connected with the second electrode, for receiving a charge from the second electrode during the first period and applying a charge to the second electrode during the second period; a first section for prohibiting a movement of a charge between the first charging section and the first electrode during a third period between the first period and the second period; a second section for prohibiting a movement of a charge between the second charging section and the second electrode during the third period; and a third section for allowing a movement of a charge between the first electrode and the second electrode during a fourth period included in the third period.
    Type: Grant
    Filed: March 11, 1996
    Date of Patent: January 9, 2001
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hisao Okada, Yuji Yamamoto, Sunao Etou
  • Patent number: 5923312
    Abstract: A driving circuit used in a display apparatus includes a plurality of output circuits for selecting two reference gradation voltages among a plurality of different reference gradation voltages based on display data and outputting an interpolation voltage corresponding to the display data using the two reference gradation voltages; and a plurality of supply lines for supplying the plurality of reference gradation voltages. The supply lines including a plurality of voltage supply lines and a plurality of signal supply lines. One of the plurality of voltage supply lines supplies a voltage having a minimum difference from the voltage of a common electrode of the display apparatus and another of the plurality of voltage supply lines supplies a voltage having a maximum difference from the voltage of the common electrode. The two reference gradation voltages selected by each of the output circuits are supplied by one of a plurality of pairs of supply lines.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 13, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hisao Okada, Yuji Yamamoto, Sunao Etou, Kuniaki Tanaka