Patents by Inventor David Joseph Christy

David Joseph Christy 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).

  • Method for starting a discharge lamp using high energy initial pulse
    Patent number: 7880397
    Abstract: The described DC to AC inverter efficiently controls the amount of electrical power used to drive a cold cathode fluorescent lamp (CCFL). Additionally, during striking of the CCFL, a higher energy initial energy pulse is used. During normal operation, a lower energy pulse is used.
    Type: Grant
    Filed: August 15, 2007
    Date of Patent: February 1, 2011
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Timothy J. Rust, James C. Moyer, David Joseph Christy
  • Method for starting a discharge lamp using high energy initial pulse
    Patent number: 7355354
    Abstract: The described DC to AC inverter efficiently controls the amount of electrical power used to drive a cold cathode fluorescent lamp (CCFL). Additionally, during striking of the CCFL, a higher energy initial energy pulse is used. During normal operation, a lower energy pulse is used.
    Type: Grant
    Filed: February 3, 2004
    Date of Patent: April 8, 2008
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Timothy James Rust, James Copland Moyer, David Joseph Christy
  • Method for starting a discharge lamp using high energy initial pulse
    Patent number: 6900600
    Abstract: The described DC to AC inverter efficiently controls the amount of electrical power used to drive a cold cathode fluorescent lamp (CCFL). The inverter uses a full bridge that is controlled to deliver energy to the CCFL using pulse width modulation (PWM). Additionally, during striking of the CCFL, a wider initial energy pulse is used. During normal operation, a lower energy pulse is used.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: May 31, 2005
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Timothy James Rust, James Copland Moyer, David Joseph Christy
  • Method for starting a discharge lamp using high energy initial pulse
    Publication number: 20040155607
    Abstract: The described DC to AC inverter efficiently controls the amount of electrical power used to drive a cold cathode fluorescent lamp (CCFL). Additionally, during striking of the CCFL, a higher energy initial energy pulse is used. During normal operation, a lower energy pulse is used.
    Type: Application
    Filed: February 3, 2004
    Publication date: August 12, 2004
    Inventors: Timothy James Rust, James Copland Moyer, David Joseph Christy
  • Method for starting a discharge lamp using high energy initial pulse
    Publication number: 20020171376
    Abstract: The described DC to AC inverter efficiently controls the amount of electrical power used to drive a cold cathode fluorescent lamp (CCFL). Additionally, during striking of the CCFL, a higher energy initial energy pulse is used. During normal operation, a lower energy pulse is used.
    Type: Application
    Filed: May 31, 2002
    Publication date: November 21, 2002
    Inventors: Timothy James Rust, James Copland Moyer, David Joseph Christy