Patents by Inventor Karl Zijtveld

Karl Zijtveld 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).

  • Publication number: 20190172983
    Abstract: A ceramic green wavelength conversion element (120) is coated with a red wavelength conversion material (330) and placed above a blue light emitting element (110) such that the ceramic element (120) is attached to the light emitting element (110), thereby providing an efficient thermal coupling from the red and green converters (330, 120) to the light emitting element (110) and its associated heat sink. To protect the red converter coating (330) from the effects of subsequent processes, a sacrificial clear coating (340) is created above the red converter element (330). This clear coating (340) may be provided as a discrete layer of clear material, or it may be produced by allowing the red converters to settle to the bottom of its suspension material, thereby forming a converter-free upper layer that can be subjected to the subsequent fabrication processes.
    Type: Application
    Filed: February 11, 2019
    Publication date: June 6, 2019
    Applicant: Lumileds LLC
    Inventors: April Schricker, Kim Mai, Grigoriy Basin, Uwe Mackens, Joost Vogels, Aldegonda Weijers, Karl Zijtveld