Light emitting diode module with three part color matching

摘要

A light emitting diode module is produced using at least one LED and at least two selectable components that form a light mixing chamber. First and second selectable components have first and second types of wavelength converting materials with different wavelength converting characteristics. The first and second wavelength converting characteristics alter the spectral power distribution of the light produced by the LED to produce light with a color point that is a predetermined tolerance from a predetermined color point. Moreover, a set of LED modules may be produced such that each LED module has the same color point within a predetermined tolerance. The LED module may be produced by pre-measuring the wavelength converting characteristics of the different components selecting components with wavelength converting characteristics that convert the spectral power distribution of the LED to a color point that is a predetermined tolerance from a predetermined color point.

主权项

1. An illumination module comprising:
at least one light emitting diode operable to produce an amount of light with a spectral power distribution; and a light mixing chamber configured to convert a portion of the amount of light emitted by the at least one light emitting diode to an amount of converted light, wherein the light mixing chamber includes an output port operable to output light including a portion of the amount of converted light, a first type of wavelength converting material having a first wavelength converting characteristic, and a second type of wavelength converting material having a second wavelength converting characteristic that is different from the first wavelength converting characteristic, the first type of wavelength converting material and the second type of wavelength converting material being located on a wavelength converting component that is physically separated from the at least one light emitting diode such that the first type of wavelength converting material and the second type of wavelength converting material are each in a direct optical path of the light emitted by the at least one light emitting diode; wherein the first type of wavelength converting material and the second type of wavelength converting material are selected prior to final assembly of the illumination module such that the light that is output from the output port has a color point within a degree of departure Δu′v′ of 0.009 from a target color point in a CIE 1976 u′v′ diagram.