Patents by Inventor Suehiro Goto

Suehiro Goto 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).

  • Display device with light emitting elements
    Patent number: 7221349
    Abstract: A display current of a whole gray scale range according to a display signal of four bits is produced from a sum of output currents of an analog current supply circuit producing a first output current according to lower data bits and two digital current supply circuits operating in accordance with corresponding data bits to execute or stop generation of second and third output currents according to higher data bits. The analog current supply circuit has a calibration function of compensating for output current variations due to transistor characteristics at one point in a control range of the first output current. A display device with light-emitting elements can accurately generate a display current for gray-scale expression without imposing an excessive load on a manufacturing process while suppressing circuit footprint.
    Type: Grant
    Filed: May 10, 2004
    Date of Patent: May 22, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Ryuichi Hashido, Hidetada Tokioka, Masafumi Agari, Suehiro Goto, Takahiro Urakabe
  • Display device with light emitting elements
    Publication number: 20040251844
    Abstract: A display current of a whole gray scale range according to a display signal of four bits is produced from a sum of output currents of an analog current supply circuit producing a first output current according to lower data bits and two digital current supply circuits operating in accordance with corresponding data bits to execute or stop generation of second and third output currents according to higher data bits. The analog current supply circuit has a calibration function of compensating for output current variations due to transistor characteristics at one point in a control range of the first output current. A display device with light-emitting elements can accurately generate a display current for gray-scale expression without imposing an excessive load on a manufacturing process while suppressing circuit footprint.
    Type: Application
    Filed: May 10, 2004
    Publication date: December 16, 2004
    Applicant: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Ryuichi Hashido, Hidetada Tokioka, Masafumi Agari, Suehiro Goto, Takahiro Urakabe