Patent ID: 9136444
Filing Date: 2015-09-15
Classification: C09K,F21K,F21V,H01L,Y02B

Abstract:
1. An illuminator comprising: a heat-removing base having a base surface, an aperture on the base surface dividing the base surface on a first end, a second end, a periphery, and angled edges formed near the periphery of the aperture; a primary radiation source including at least one light-emitting diode, the at least one light-emitting diode is located on the angled edge formed near the periphery of the aperture in the heat removing base; a reflector having a light reflective surface facing the at least one light-emitting diode, the light reflective surface having a concave shape; a radiation conversion layer located between the at least one light-emitting diode and the reflector, the radiation conversion layer having a concave surface facing the at least one light-emitting diode and a convex surface facing the reflector, the radiation conversion layer including photoluminescent phosphorous grains, the radiation conversion layer converts a first radiation emitted by the at least one light-emitting diode and into a second radiation; wherein: a first portion of the first radiation emitted by the at least one light-emitting diode reflects from the concave surface of the radiation conversion layer existing through the aperture of the heat-removing base; a second portion of the first radiation emitted by the at least one light-emitting diode is transformed into the second radiation by the photoluminescent phosphorous grains on the radiation conversion layer; a third portion of the first radiation emitted by the at least one light-emitting diode reaches the concave surface of the light reflective surface of the reflector, reflects back to the conversion layer, is partially absorbed by the photoluminescent phosphorous grains on the radiation conversion and exists through the aperture of the heat-removing base and mixing with the second radiation forming a white radiation.