Patents by Inventor Hayafuji Akinori

Hayafuji Akinori 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).

  • Driver for an OLED passive-matrix display
    Patent number: 7619598
    Abstract: An OLED (organic light-emitting diode) passive-matrix display includes a display portion and a driver portion. The display portion includes a matrix of OLEDs for displaying information. The driver portion includes a monitor circuit and a voltage adjusting circuit. The voltage adjusting circuit has a power-up portion that generates a supply voltage based on a reference voltage. In response to an indication to switch modes, the voltage adjusting circuit switches to an operational mode wherein the supply voltage is generated based on the maximum voltage drop read across the OLEDs.
    Type: Grant
    Filed: October 10, 2006
    Date of Patent: November 17, 2009
    Assignee: STMicroelectronics S.r.l.
    Inventors: Francesco Pulvirenti, Gregorio Bontempo, Murakata Masaki, Hayafuji Akinori
  • Driver for an oled passive-matrix display
    Publication number: 20070171155
    Abstract: An OLED (organic light-emitting diode) passive-matrix display includes a display portion and a driver portion. The display portion includes a matrix of OLEDs for displaying information. The driver portion includes a monitor circuit and a voltage adjusting circuit. The voltage adjusting circuit has a power-up portion that generates a supply voltage based on a reference voltage. In response to an indication to switch modes, the voltage adjusting circuit switches to an operational mode wherein the supply voltage is generated based on the maximum voltage drop read across the OLEDs.
    Type: Application
    Filed: October 10, 2006
    Publication date: July 26, 2007
    Applicant: STMicroelectronics S.r.l.
    Inventors: Francesco Pulvirenti, Gregorio Bontempo, Murakata Masaki, Hayafuji Akinori