LED WITH CONTROLLED ANGULAR NON-UNIFORMITY

摘要

PROBLEM TO BE SOLVED: To control the angular dependency of an LED to produce a desired non-uniformity.SOLUTION: A light source that uses a light emitting diode together with a wavelength conversion element is configured to produce a non-uniform angular color distribution. The light source can be used with a specific light based device that translate the angular color distribution into a uniform color distribution. The ratio of height and width for the wavelength conversion element is selected to produce the non-uniform angular color distribution that is desired. The use of a controlled angular color non-uniformity in the light source and using it in applications that translate the non-uniformity into a uniform color distribution increase the efficiency of a system compared to conventional systems in which a uniform angular light emitting diode is used.