COLOR CONVERSION CAVITIES FOR LED-BASED ILLUMINATION MODULES

摘要

An illumination module includes a plurality of Light Emitting Diodes (LEDs). Multiple color conversion cavities are present, each with sidewalls coated with wavelength converting materials. One or more LEDs are located within each color conversion cavity. A transmissive layer may be deposited over the color conversion cavities and may include additional wavelength converting material. The wavelength converting materials may be selected to produce an output light with target color point. Additionally, a secondary light mixing cavity may be present over the multiple color conversion cavities.

主权项

1. An LED based illumination device, comprising:
a plurality of LEDs; a translucent, non-planar shaped window disposed above and spaced apart from the plurality of LEDs, the translucent, non-planar shaped window including a first wavelength converting material that color converts an amount of light emitted from the plurality of LEDs, wherein a reflector attached to the LED based illumination device has an interior volume that envelops the translucent, non-planar shaped window; and a first color conversion cavity including a reflective sidewall that extends in a direction from a plane in which at least one LED of the plurality of LEDs is disposed toward a transmissive layer disposed between the plurality of LEDs and the translucent, non-planar shaped window, wherein a portion of the transmissive layer is coated with a second wavelength converting material.