LED-BASED ILLUMINATION MODULE WITH PREFERENTIALLY ILLUMINATED COLOR CONVERTING SURFACES

摘要

An illumination module includes a color conversion cavity with multiple interior surfaces, such as sidewalls and an output window. A shaped reflector is disposed above a mounting board upon which are mounted LEDs. The shaped reflector includes a first plurality of reflective surfaces that preferentially direct light emitted from a first LED to a first interior surface of the color conversion cavity and a second plurality of reflective surfaces that preferentially direct light emitted from a second LED to a second interior surface. The illumination module may further include a second color conversion cavity.

主权项

1. An LED based illumination device, comprising:
a color conversion cavity comprising a first interior surface including a first wavelength converting material and a second interior surface including a second wavelength converting material; a first LED mounted to a mounting board, the first LED configured to receive a first current, wherein an amount of light emitted from the first LED illuminates the first interior surface of the color conversion cavity; and a second LED mounted to the mounting board, wherein light emitted by the second LED is the same color as light emitted by the first LED, the second LED configured to receive a second current, wherein an amount of light emitted from the second LED illuminates the second interior surface of the color conversion cavity, wherein the light emitted by the first wavelength converting material, the light emitted by the second wavelength converting material, the light emitted by the first LED, and the light emitted by the second LED are mixed in the color conversion cavity to produce a combined light that is emitted from the color conversion cavity, and wherein the first current and the second current are selectable to achieve a range of correlated color temperature (CCT) of the combined light output by the LED based illumination device.