LIGHT-EMITTING DIODE SOURCE OF WHITE LIGHT WITH A REMOTE PHOSPHOR CONVERTER

摘要

The invention relates to sources of white light on the basis of semiconductor light-emitting diodes with remote phosphor converters. Subject of the invention: a lamp comprises a heat-dissipating base with a radiation exit opening, and light-emitting diodes fixed over the periphery of the opening, with, arranged in series at a distance from said light-emitting diodes, a radiation converter in the form of a concave layer of phosphor material, the cavity of which is turned towards the light-emitting diodes and the exit opening. As primary radiation from the light-emitting diodes is incident on the surface of the converter, a white light formed as a result of the reflected primary radiation and the secondary radiation of the phosphor material mixing exits into the opening in the heat-dissipating base, while white light formed as a result of the primary radiation passing through the converter and the secondary radiation of the phosphor material mixing exits through the layer of phosphor material. The concave surface of the converter can be in the form of a truncated ellipsoid of revolution, in particular a sphere, or a paraboloid, with a main axis perpendicular to the plane of the opening in the heat-dissipating base, or a cylinder which is truncated by the plane of the exit opening.