Patents by Inventor Jan De Graff

Jan De Graff 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).

  • Cooling device for a light-emitting semiconductor device and a method of manufacturing such a cooling device
    Patent number: 7855449
    Abstract: A cooling device for cooling a light-emitting semiconductor device, such as a LED device (20), comprises a ceramic plate (15) having coolant-conveying channels (12) incorporated therein. The ceramic plate (15) is adapted for forming an integral part of the optical system of the light-emitting semiconductor device (20) and to cool a light-emitting portion (26) of the light-emitting semiconductor device (20). A method of forming a cooling device comprises the steps of forming a charge of ceramic particles, embossing the charge with a stamp to form coolant-conveying channels in the charge, hardening the charge, and providing a cover on top of the channels to seal them.
    Type: Grant
    Filed: April 19, 2006
    Date of Patent: December 21, 2010
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Jan De Graff, Celine Catherine Sarah Nicole, Marcus Antonius Verschuuren, Hans Van Sprang, Theo Arnold Kop, Johan Marra, Ronald Martin Wolf