Patents by Inventor Brian Jeffrey Buell

Brian Jeffrey Buell 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).

  • Inverter for driving EL lamp and liquid crystal display
    Patent number: 6597123
    Abstract: An inverter for driving an EL lamp is tapped to provide voltage or current for driving one or more EL lamps and an LCD. In accordance with one aspect of the invention, one side of the pump inductor is tapped for a voltage that drives the LCD.
    Type: Grant
    Filed: January 13, 2003
    Date of Patent: July 22, 2003
    Assignee: Durel Corporation
    Inventors: Brian Jeffrey Buell, Robert Allen Kimball
  • INVERTER FOR DRIVING EL LAMP AND LIQUID CRYSTAL DISPLAY
    Publication number: 20030132715
    Abstract: An inverter for driving an EL lamp is tapped to provide voltage or current for driving one or more EL lamps and an LCD. In accordance with one aspect of the invention, one side of the pump inductor is tapped for a voltage that drives the LCD.
    Type: Application
    Filed: January 13, 2003
    Publication date: July 17, 2003
    Applicant: Durel Corporation
    Inventors: Brian Jeffrey Buell, Robert Allen Kimball
  • Inverter for driving EL lamp and light emitting diodes
    Patent number: 6580222
    Abstract: An inverter for driving an EL lamp is tapped to provide voltage or current for driving one or more EL lamps, LEDs, and an LCD. In accordance with one aspect of the invention, one side of the pump inductor is tapped for a voltage that drives one or more LEDs and the LCD. In accordance with another aspect of the invention, the LEDs are in series with a storage capacitor and are driven by the current pulses to the storage capacitor.
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: June 17, 2003
    Assignee: Durel Corporation
    Inventors: Brian Jeffrey Buell, Robert Allen Kimball
  • Inverter for driving EL lamp and light emitting diodes
    Publication number: 20020113558
    Abstract: An inverter for driving an EL lamp is tapped to provide voltage or current for driving one or more EL lamps, LEDs, and an LCD. In accordance with one aspect of the invention, one side of the pump inductor is tapped for a voltage that drives one or more LEDs and the LCD. In accordance with another aspect of the invention, the LEDs are in series with a storage capacitor and are driven by the current pulses to the storage capacitor.
    Type: Application
    Filed: February 20, 2001
    Publication date: August 22, 2002
    Applicant: Durel Corporation
    Inventors: Brian Jeffrey Buell, Robert Allen Kimball
  • EL driver with lamp discharge monitor
    Patent number: 6320323
    Abstract: A driver for an EL lamp includes a voltage detector coupled to the lamp for monitoring the voltage across the lamp and providing an indication of when the lamp is substantially discharged.
    Type: Grant
    Filed: May 18, 2000
    Date of Patent: November 20, 2001
    Assignee: Durel Corporation
    Inventors: Brian Jeffrey Buell, Grady M. Wood
  • EL driver with low side current mirrors
    Patent number: 6297597
    Abstract: A driver for an EL lamp includes a source of high voltage coupled to a first voltage rail and a second voltage rail and a transistor bridge output coupled to the rails, wherein the bridge output has no current mirrors for the high side transistors in the bridge output.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: October 2, 2001
    Assignee: Durel Corporation
    Inventor: Brian Jeffrey Buell
  • EL driver with reduced pin count
    Patent number: 6259619
    Abstract: An inverter for driving an EL lamp includes a half-bridge output. The inverter can be implemented in junction isolation processes, among others, on smaller die than in the prior art in a package with a lower pin count than known circuits of the same functionality.
    Type: Grant
    Filed: August 28, 2000
    Date of Patent: July 10, 2001
    Assignee: Durel Corporation
    Inventor: Brian Jeffrey Buell
  • Half-bridge inverter for coupling an EL lamp to a high voltage DC rail
    Patent number: 6181589
    Abstract: An inverter for driving an EL lamp includes a half-bridge output. The inverter can be implemented in junction isolation processes, among others, on smaller die than in the prior art in a package with a lower pin count than known circuits of the same functionality.
    Type: Grant
    Filed: July 2, 1999
    Date of Patent: January 30, 2001
    Assignee: Durel Corporation
    Inventor: Brian Jeffrey Buell
  • Single inverter with dual boost
    Patent number: 6091164
    Abstract: An inductive boost circuit is added in parallel with an inverter to increase current to an EL lamp. The inverter and the boost circuit each include a switching transistor. The switching transistor in the inductive boost circuit may be matched to the switching transistor in the inverter and may be driven synchronously with the switching transistor in the inverter.
    Type: Grant
    Filed: October 29, 1998
    Date of Patent: July 18, 2000
    Assignee: Durel Corporation
    Inventor: Brian Jeffrey Buell
  • Battery operated power supply including a low level boost and a high level boost
    Patent number: 6043610
    Abstract: An EL lamp is driven by a power supply including a voltage boost circuit and a low power inverter. The boost circuit includes a level shifting capacitor to provide voltage doubling. The inverter includes an inductor and at least one transistor connected in series between the output of the boost circuit and ground.
    Type: Grant
    Filed: July 16, 1998
    Date of Patent: March 28, 2000
    Assignee: Durel Corporation
    Inventor: Brian Jeffrey Buell