Patent ID: 8985815
Filing Date: 2015-03-24
Classification: F21K,F21V,F21Y

Abstract:
1. A light bulb, comprising: a lamp base unit comprising a base electrically connectable to an external lamp socket, an electrically insulative hollow column mounted at said base, a metal cylindrical heat sink surrounding said electrically insulative hollow column, a light-transmissive shade surrounding an upper part of said metal cylindrical heat sink, and a power supply module accommodated in said electrically insulative hollow column and electrically connected to said base; a light source module comprising a metal holder plate supported on said electrically insulative hollow column and said light-transmissive shade, a first circuit board attached to a top wall of said metal holder plate and electrically connected to said power supply module, said first circuit board comprising a plurality of upward-facing light-emitting diodes, and a second circuit board attached to a bottom wall of said metal holder plate and electrically connected to said power supply module, said second circuit board comprising a plurality of downward-facing light-emitting diodes; and a light transmitting lamp shell fastened to said metal holder plate and capped on said light-transmissive shade, wherein said light source module further comprises an electric connector mounted at said second circuit board and electrically connected to said first circuit board, said electric connector comprising a plurality of upright contact pins, a first adapter board mounted at a top side of said first circuit board and bonded to said upright contact pins of said electric connector and electrically connected to said power supply module, a second adapter board mounted at a bottom side of said second circuit board and bonded to said upright contact pins of said electric connector; said metal holder plate, said first circuit board and said second circuit board each comprise a connector hole for accommodating said electric connector.