Patents by Inventor Aurelien J. David

Aurelien J. David 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).

  • LED with remote phosphor layer and reflective submount
    Patent number: 8168998
    Abstract: A light emitting device comprises a flip-chip light emitting diode (LED) die mounted on a submount. The top surface of the submount has a reflective layer. Over the LED die is molded a hemispherical first transparent layer. A low index of refraction layer is then provided over the first transparent layer to provide TIR of phosphor light. A hemispherical phosphor layer is then provided over the low index layer. A lens is then molded over the phosphor layer. The reflection achieved by the reflective submount layer, combined with the TIR at the interface of the high index phosphor layer and the underlying low index layer, greatly improves the efficiency of the lamp. Other material may be used. The low index layer may be an air gap or a molded layer. Instead of a low index layer, a distributed Bragg reflector may be sputtered over the first transparent layer.
    Type: Grant
    Filed: June 9, 2009
    Date of Patent: May 1, 2012
    Assignees: Koninklijke Philips Electronics N.V., Philips Lumileds Lighting Company, LLC
    Inventors: Aurelien J. David, Rafael I. Aldaz, Mark Butterworth, Serge J. Bierhuizen