LED illumination device with a highly uniform illumination pattern

摘要

An LED (light emitting diode) illumination device that can generate a uniform light output illumination pattern. The illumination device includes an array of LEDs, each having a LED central axis. The LED central axis of the array of LEDs is angled approximately toward a central point. The illumination source includes a reflector with a conic or conic-like shape. The reflector wraps around the front of the LED to redirect the light emitted along a LED central axis.

主权项

1. An illumination source comprising:
a plurality of light emitting diode (LED) illumination devices arranged to emit light in a circular illumination pattern having a uniform illumination pattern, wherein each one of the LED illumination devices comprises:
a plurality of LED light sources arranged in an array, wherein each one of the plurality of LED light sources comprises an LED central axis at 0 degrees; anda reflector, wherein a cross section of the reflector is projected along a line, wherein the reflector comprises a conic-like cross section, wherein each one of the plurality of LED light sources is positioned relative to the reflector such that a maximum illumination of each one of the plurality of LED illumination devices is at a distance to a mounting height ratio greater than 1 and at least a portion of light emitted by each one of the plurality of LED light sources between −10 degrees and −40 degrees is reflected by the reflector to angles between −100 degrees and −180 degrees.