White Light LED Filament Having Blue Light Emitting Units and a Strip-Shaped Fluorescent Wafer

摘要

The present invention relates to a white light LED lamp and a filament. The white light LED filament comprises light emitting units and a strip-shaped fluorescent wafer(s) at least positioned at one side of the light emitting units, wherein the light emitting units are blue-emitting chips connected by a metal wire or an electric conductive circuit, and wherein electrodes are arranged at the end(s) of the fluorescent wafer. Without any lens, the filament of the present invention has a simple structure. A white light LED lamp using the filament realizes a 360° stereo-luminescence, and shows the advantages of low cost, excellent heat radiation, high luminous efficacy and so on.

主权项

1. A white light LED filament comprising:
light emitting units arranged along a channel of a fluorescent wafer substrate such that the light emitting units are surrounded on three sides by the fluorescent wafer; the light emitting units each having an open side not surrounded by the fluorescent wafer; the light emitting units comprising blue-emitting chips connected by a metal wire or an electric conductive circuit; and each of the light emitting units having an individual blue light reflecting layer formed on the open side.