Patents by Inventor Muhinthan Murugesu

Muhinthan Murugesu 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).

  • Solid state lighting panels with variable voltage boost current sources
    Patent number: 8941331
    Abstract: A lighting system includes a lighting panel having a string of solid state lighting devices and a current supply circuit having a voltage input terminal, a control input terminal, and first and second output terminals coupled to the string of solid state lighting devices. The current supply circuit is configured to supply an on-state drive current to the string of solid state lighting devices in response to a control signal. The current supply circuit includes a charging inductor coupled to the voltage input terminal and an output capacitor coupled to the first output terminal. The current supply circuit is configured to operate in continuous conduction mode in which current continuously flows through the charging inductor while the on-state drive current is supplied to the string of solid state light emitting devices.
    Type: Grant
    Filed: May 17, 2013
    Date of Patent: January 27, 2015
    Assignee: Cree, Inc.
    Inventors: John K. Roberts, Keith J. Vadas, Muhinthan Murugesu
  • Solid state lighting panels with variable voltage boost current sources
    Patent number: 8461776
    Abstract: A lighting system includes a lighting panel having a string of solid state lighting devices and a current supply circuit having a voltage input terminal, a control input terminal, and first and second output terminals coupled to the string of solid state lighting devices. The current supply circuit is configured to supply an on-state drive current to the string of solid state lighting devices in response to a control signal. The current supply circuit includes a charging inductor coupled to the voltage input terminal and an output capacitor coupled to the first output terminal. The current supply circuit is configured to operate in continuous conduction mode in which current continuously flows through the charging inductor while the on-state drive current is supplied to the string of solid state light emitting devices.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: June 11, 2013
    Assignee: Cree, Inc.
    Inventors: John K. Roberts, Keith J. Vadas, Muhinthan Murugesu
  • Solid State Lighting Panels with Variable Voltage Boost Current Sources
    Publication number: 20120235575
    Abstract: A lighting system includes a lighting panel having a string of solid state lighting devices and a current supply circuit having a voltage input terminal, a control input terminal, and first and second output terminals coupled to the string of solid state lighting devices. The current supply circuit is configured to supply an on-state drive current to the string of solid state lighting devices in response to a control signal. The current supply circuit includes a charging inductor coupled to the voltage input terminal and an output capacitor coupled to the first output terminal. The current supply circuit is configured to operate in continuous conduction mode in which current continuously flows through the charging inductor while the on-state drive current is supplied to the string of solid state light emitting devices.
    Type: Application
    Filed: May 11, 2012
    Publication date: September 20, 2012
    Inventors: John K. Roberts, Keith J. Vadas, Muhinthan Murugesu
  • Solid state lighting panels with variable voltage boost current sources
    Patent number: 8203286
    Abstract: A lighting panel system includes a lighting panel having a string of solid state lighting devices and a current supply circuit having a voltage input terminal, a control input terminal, and first and second output terminals coupled to the string of solid state lighting devices. The current supply circuit is configured to supply an on-state drive current to the string of solid state lighting devices in response to a control signal. The current supply circuit includes a charging inductor coupled to the voltage input terminal and an output capacitor coupled to the first output terminal. The current supply circuit is configured to operate in continuous conduction mode in which current continuously flows through the charging inductor while the on-state drive current is supplied to the string of solid state light emitting devices.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: June 19, 2012
    Assignee: Cree, Inc.
    Inventors: John K. Roberts, Keith J. Vadas, Muhinthan Murugesu
  • Solid State Lighting Panels with Variable Voltage Boost Current Sources
    Publication number: 20110127917
    Abstract: A lighting panel system includes a lighting panel having a string of solid state lighting devices and a current supply circuit having a voltage input terminal, a control input terminal, and first and second output terminals coupled to the string of solid state lighting devices. The current supply circuit is configured to supply an on-state drive current to the string of solid state lighting devices in response to a control signal. The current supply circuit includes a charging inductor coupled to the voltage input terminal and an output capacitor coupled to the first output terminal. The current supply circuit is configured to operate in continuous conduction mode in which current continuously flows through the charging inductor while the on-state drive current is supplied to the string of solid state light emitting devices.
    Type: Application
    Filed: December 23, 2010
    Publication date: June 2, 2011
    Inventors: John K. Roberts, Keith J. Vadas, Muhinthan Murugesu
  • Solid state lighting panels with variable voltage boost current sources
    Patent number: 7872430
    Abstract: A lighting panel system includes a lighting panel having a string of solid state lighting devices and a current supply circuit having a voltage input terminal, a control input terminal, and first and second output terminals coupled to the string of solid state lighting devices. The current supply circuit is configured to supply an on-state drive current to the string of solid state lighting devices in response to a control signal. The current supply circuit includes a charging inductor coupled to the voltage input terminal and an output capacitor coupled to the first output terminal. The current supply circuit is configured to operate in continuous conduction mode in which current continuously flows through the charging inductor while the on-state drive current is supplied to the string of solid state light emitting devices.
    Type: Grant
    Filed: November 17, 2006
    Date of Patent: January 18, 2011
    Assignee: Cree, Inc.
    Inventors: John K. Roberts, Keith J. Vadas, Muhinthan Murugesu
  • Solid state lighting panels with variable voltage boost current sources
    Publication number: 20070115248
    Abstract: A lighting panel system includes a lighting panel having a string of solid state lighting devices and a current supply circuit having a voltage input terminal, a control input terminal, and first and second output terminals coupled to the string of solid state lighting devices. The current supply circuit is configured to supply an on-state drive current to the string of solid state lighting devices in response to a control signal. The current supply circuit includes a charging inductor coupled to the voltage input terminal and an output capacitor coupled to the first output terminal. The current supply circuit is configured to operate in continuous conduction mode in which current continuously flows through the charging inductor while the on-state drive current is supplied to the string of solid state light emitting devices.
    Type: Application
    Filed: November 17, 2006
    Publication date: May 24, 2007
    Inventors: John Roberts, Keith Vadas, Muhinthan Murugesu