Patent ID: 7073922

Claim:
A lighting apparatus comprising: a plurality of light-emitting diodes for emitting red, blue, and green light, the plurality of light-emitting diodes being operable to emit light beams and being arranged so as to emit the light beams toward a single focusing point; a control circuit for controlling the intensity of light emission of each of the light-emitting diodes emitting red, blue, and green light; a concave reflector for reflecting and radiating the light focused from the light-emitting diodes to the focusing point so that the light is further focused or scattered; and a position-changing mechanism for changing a position of at least one of the concave reflector and the plurality of light-emitting diodes, wherein the light-emitting diodes are arranged so that the light beams emitted therefrom will be reflected by the concave reflector, wherein the position-changing mechanism is operable to adjust a focal point of the concave reflector relative to the focusing point of the plurality of the light-emitting diodes so that the light beams from the light-emitting diodes are focused or scattered by the concave reflector.