SOLID STATE LAMP HAVING VAPOR CHAMBER

摘要

A solid state lamp has a form that replaces a standard screw-in or plug-in type light bulb. One or more LEDs are mounted on a thermally conductive submount, which is mounted on the top surface of a substantially round and flat vapor chamber. The vapor chamber efficiently spreads the heat and also conducts heat vertically. The vapor chamber is affixed to a substantially round mounting base of a metal housing. In this way, the very small LED dies appear to the mounting base as much larger heat sources producing less heat per unit area, and the thermal resistance of the heat path is greatly reduced. The housing has ventilation openings for cooling a bottom surface of the mounting base. The top of the vapor chamber is highly reflective, and the housing has a high emissivity coating. A standard base is attached to the housing for connection to an AC mains voltage.