Patents Assigned to Philips Lumilends Lighting Company, LLC
  • Patent number: 7858408
    Abstract: Overmolded lenses and certain fabrication techniques are described for LED structures. In one embodiment, thin YAG phosphor plates are formed and affixed over blue LEDs mounted on a submount wafer. A clear lens is then molded over each LED structure during a single molding process. The LEDs are then separated from the wafer. The molded lens may include red phosphor to generate a warmer white light. In another embodiment, the phosphor plates are first temporarily mounted on a backplate, and a lens containing a red phosphor is molded over the phosphor plates. The plates with overmolded lenses are removed from the backplate and affixed to the top of an energizing LED. A clear lens is then molded over each LED structure. The shape of the molded phosphor-loaded lenses may be designed to improve the color vs. angle uniformity. Multiple dies may be encapsulated by a single lens. In another embodiment, a prefabricated collimating lens is glued to the flat top of an overmolded lens.
    Type: Grant
    Filed: February 26, 2007
    Date of Patent: December 28, 2010
    Assignees: Koninklijke Philips Electronics N.V., Philips Lumilends Lighting Company, LLC
    Inventors: Gerd O. Mueller, Regina Mueller-Mach, Grigoriy Basin, Robert Scott West, Paul S. Martin, Tze-Sen Lim, Stefan Eberle