Patents by Inventor Sander Heuvelmans

Sander Heuvelmans 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).

  • Accurate mains time-base for LED light driver
    Patent number: 9474120
    Abstract: A controller for a driver circuit of a solid state lighting (SSL) device is described. The driver circuit comprises a power converter to transfer energy from AC mains voltage to the SSL device. The controller determines a dim level for the SSL device. The controller also determines a synchronization signal by comparing a voltage derived from the input voltage with a pre-determined threshold. The controller determines a sequence of PWM pulses based on the synchronization signal. The controller operates the power converter in a first operation mode for supplying energy to the SSL device at a first energy level within the sequence of PWM pulses, and operates the power converter in a second operation mode in between the PWM pulses. The second energy level is lower than the first energy level and the first energy level and/or a width of the PWM pulses depend on the dim level.
    Type: Grant
    Filed: October 16, 2015
    Date of Patent: October 18, 2016
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Julian Tyrrell, Sander Heuvelmans, Nebojsa Jelaca, Gary Hague
  • Accurate Mains Time-Base for LED Light Driver
    Publication number: 20160119992
    Abstract: A controller for a driver circuit of a solid state lighting (SSL) device is described. The driver circuit comprises a power converter to transfer energy from AC mains voltage to the SSL device. The controller determines a dim level for the SSL device. The controller also determines a synchronization signal by comparing a voltage derived from the input voltage with a pre-determined threshold. The controller determines a sequence of PWM pulses based on the synchronization signal. The controller operates the power converter in a first operation mode for supplying energy to the SSL device at a first energy level within the sequence of PWM pulses, and operates the power converter in a second operation mode in between the PWM pulses. The second energy level is lower than the first energy level and the first energy level and/or a width of the PWM pulses depend on the dim level.
    Type: Application
    Filed: October 16, 2015
    Publication date: April 28, 2016
    Inventors: Julian Tyrrell, Sander Heuvelmans, Nebojsa Jelaca, Gary Hague