Patents by Inventor Harold Josef Gunther Radermacher

Harold Josef Gunther Radermacher 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).

  • Short detection circuit for an LED driver and short detection method
    Patent number: 9723685
    Abstract: A short detection circuit is provided for detecting a short circuit condition of an LED. A voltage threshold is set which is dependent on the LED operating current, such that there are at least two different voltage thresholds at two different LED operating currents. This means false detections can be reduced and the LED current operating range can be increased over which the short detection functions.
    Type: Grant
    Filed: August 13, 2014
    Date of Patent: August 1, 2017
    Assignee: OLEDWORKS GMBH
    Inventors: Christian Kalkschmidt, Etienne Nicolaas Kathalijntje Paulus Marie Eberson, Alexander Rudolf Albrecht Isphording, Harold Josef Gunther Radermacher
  • Lighting device and method of cooling a lighting device
    Patent number: 8319406
    Abstract: The invention relates to a light device comprising a light source (2), a ventilation unit (3) and a sealed transparent casing (4) sealing the inside (5) of the casing from the outside of the casing (4). The light source (2) and the ventilation unit (3) are located within the casing (4) and the ventilation unit (3) is adapted for generating a gas flow (6, 7) for transporting heat generated by the light source (2) to an inner surface (8) of the casing (4).
    Type: Grant
    Filed: September 16, 2008
    Date of Patent: November 27, 2012
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Harold Josef Gunther Radermacher
  • LIGHTING DEVICE AND METHOD OF COOLING A LIGHTING DEVICE
    Publication number: 20100207501
    Abstract: The invention relates to a light device comprising a light source (2), a ventilation unit (3) and a sealed transparent casing (4) sealing the inside (5) of the casing from the outside of the casing (4). The light source (2) and the ventilation unit (3) are located within the casing (4) and the ventilation unit (3) is adapted for generating a gas flow (6, 7) for transporting heat generated by the light source (2) to an inner surface (8) of the casing (4).
    Type: Application
    Filed: September 16, 2008
    Publication date: August 19, 2010
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventor: Harold Josef Gunther Radermacher