Patent ID: 7280288
Filing Date: 2007-10-09
Classification: G02B,H01L

Abstract:
1. A composite optical lens of a light emitting die package, the package including a leadframe and a molded body having a top portion and a bottom portion, the molded body integrated with portions of the leadframe so that the molded body top portion is above the leadframe and the molded body bottom portion is below the leadframe, a portion of the leadframe located within the molded body defining a mounting pad on which a light emitting device (LED) assembly is mounted, the molded body having a central opening through the top portion that receives the composite optical lens, the lens comprising: a generally semi-spherical upper portion, a concave lower portion extending downward from the upper portion of the lens into the central opening towards the molded body bottom portion, the concave lower portion having a concave bottom surface adapted to receive light and to substantially surround the LED assembly, a concave cavity being formed between the concave bottom surface and a top surface of the leadframe within the central opening, the concave cavity at least partially filled with an encapsulant to encapsulate the LED assembly, wherein a lowest point of the concave lower portion of the lens within the central opening does not contact the top surface of the leadframe within the central opening to form a gap between the lowest point of the concave lower portion and the leadframe that is free of the encapsulant for permitting encapsulant expansion and contraction, a reflective surface on a lower portion of the lens that is adapted to reflect the received light, and an optical surface on the upper portion of the lens through which the reflected light leaves the lens.