Patents by Inventor Kensuke Yaita

Kensuke Yaita 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).

  • Semiconductor device, electro-optical device, and electronic instrument
    Patent number: 7728831
    Abstract: A semiconductor device includes a source circuit and a control circuit. The source circuit includes a plurality of operational amplifiers, a plurality of transmission gates, one end of each of the transmission gates being connected to a corresponding source line, and a buffer circuit that outputs a switch control signal. When the number of transmission gates that are turned ON/OFF using the buffer circuit is referred to as n, a gate width and a gate length of a MOSFET of each of the transmission gates are respectively referred to as Wb and Lb, a gate width and a gate length of a MOSFET of the buffer circuit are respectively referred to as Wa and La, and K indicates a constant, the relationship n×Wb×Lb?K×(Wa/La) is satisfied.
    Type: Grant
    Filed: April 21, 2008
    Date of Patent: June 1, 2010
    Assignee: Seiko Epson Corporation
    Inventors: Kensuke Yaita, Masahiko Tsuchiya
  • Semiconductor device, electro-optical device, and electronic instrument
    Publication number: 20090251064
    Abstract: A semiconductor device includes a source circuit and a control circuit. The source circuit includes a plurality of operational amplifiers, a plurality of transmission gates, one end of each of the transmission gates being connected to a corresponding source line, and a buffer circuit that outputs a switch control signal. When the number of transmission gates that are turned ON/OFF using the buffer circuit is referred to as n, a gate width and a gate length of a MOSFET of each of the transmission gates are respectively referred to as Wb and Lb, a gate width and a gate length of a MOSFET of the buffer circuit are respectively referred to as Wa and La, and K indicates a constant, the relationship n×Wb×Lb?K×(Wa/La) is satisfied.
    Type: Application
    Filed: April 21, 2008
    Publication date: October 8, 2009
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Kensuke Yaita, Masahiko Tsuchiya