Patents by Inventor Arthur Lionel Stevens

Arthur Lionel Stevens 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).

  • Active flicker cancellation in lighting systems
    Patent number: 9516719
    Abstract: Compensating for disturbances in light output by a light source includes sensing light output by a light source and generating a light-sense signal based thereon, detecting a disturbance in the light-sense signal, and generating an output signal to compensate for the disturbance. An LED is driven in accordance with the periodic output signal to thereby compensate for the periodic disturbance.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: December 6, 2016
    Assignee: TerraLUX, Inc.
    Inventor: Arthur Lionel Stevens
  • Output regulation with nonlinear digital control loop compensation
    Patent number: 9209689
    Abstract: A digital compensator combines a version of the input voltage with a version of the output current or voltage in such a way as to eliminate dependence on variations in the input voltage.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: December 8, 2015
    Assignee: TerraLUX, Inc.
    Inventor: Arthur Lionel Stevens
  • ACTIVE FLICKER CANCELLATION IN LIGHTING SYSTEMS
    Publication number: 20150245440
    Abstract: Compensating for disturbances in light output by a light source includes sensing light output by a light source and generating a light-sense signal based thereon, detecting a disturbance in the light-sense signal, and generating an output signal to compensate for the disturbance. An LED is driven in accordance with the periodic output signal to thereby compensate for the periodic disturbance.
    Type: Application
    Filed: May 13, 2015
    Publication date: August 27, 2015
    Inventor: Arthur Lionel Stevens
  • Active flicker cancellation in lighting systems
    Patent number: 9060410
    Abstract: Compensating for disturbances in light output by a light source includes sensing light output by a light source and generating a light-sense signal based thereon, detecting a disturbance in the light-sense signal, and generating an output signal to compensate for the disturbance. An LED is driven in accordance with the periodic output signal to thereby compensate for the periodic disturbance.
    Type: Grant
    Filed: July 25, 2013
    Date of Patent: June 16, 2015
    Assignee: TERRALUX, INC.
    Inventor: Arthur Lionel Stevens
  • OUTPUT REGULATION WITH NONLINEAR DIGITAL CONTROL LOOP COMPENSATION
    Publication number: 20150137785
    Abstract: A digital compensator combines a version of the input voltage with a version of the output current or voltage in such a way as to eliminate dependence on variations in the input voltage.
    Type: Application
    Filed: November 19, 2013
    Publication date: May 21, 2015
    Inventor: Arthur Lionel Stevens
  • Output regulation with dynamic digital control loop compensation
    Patent number: 8975826
    Abstract: A digital compensator detects time-varying or periodic variations in the input voltage and, via the use of an iterative-learning control (“ILC”) system, a repetitive-control (“RC”) system, or a run-to-run control (“R2R”) system, generates a compensating signal based on prior behavior of the time variance.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: March 10, 2015
    Assignee: Terralux, Inc.
    Inventor: Arthur Lionel Stevens
  • ACTIVE FLICKER CANCELLATION IN LIGHTING SYSTEMS
    Publication number: 20150028748
    Abstract: Compensating for disturbances in light output by a light source includes sensing light output by a light source and generating a light-sense signal based thereon, detecting a disturbance in the light-sense signal, and generating an output signal to compensate for the disturbance. An LED is driven in accordance with the periodic output signal to thereby compensate for the periodic disturbance.
    Type: Application
    Filed: July 25, 2013
    Publication date: January 29, 2015
    Inventor: Arthur Lionel Stevens
  • IN-CIRCUIT TEMPERATURE MEASUREMENT OF LIGHT-EMITTING DIODES
    Publication number: 20120299481
    Abstract: Control systems and methods that directly measure the actual junction temperature of LEDs utilize internal electrical measurements, thereby dispensing with external sensors and/or wires. In various embodiments, the actual junction LED temperature is obtained based on the measured electrical properties, such as the voltage across and/or current passing through the LEDs, during operation. The measured junction temperature may be used in a closed-loop feedback configuration to control the power applied to the LED in order to avoid overheating.
    Type: Application
    Filed: May 25, 2012
    Publication date: November 29, 2012
    Applicant: TerraLUX, Inc.
    Inventor: Arthur Lionel Stevens