HIGHLY EFFICIENT LED-BASED ILLUMINATION MODULE WITH HIGH COLOR RENDERING

摘要

PROBLEM TO BE SOLVED: To provide an illumination module that achieves a high CRI (Color Rendering Index) value for offering superior color rendering of an object with visible spectrum and that includes an LED.SOLUTION: The illumination module includes a light mixing cavity with an interior surface and an output window which are arranged apart from an LED, a portion of the output window is coated with a first wavelength converting material, and a portion of the interior surface is coated with a second wavelength converting material. The output window may be coated with a third wavelength converting material which has a peak light emission wavelength of 615-655 nm so that the spectrum response of light emitted from the output window is 20% or less of the spectrum response of a black radiator at the same CCT (Correlated Color Temperature). The LED emitted light is converted by the light mixing cavity including: two photo-luminescent materials that have a peak light emission wavelength of 508-528 nm and a peak light emission wavelength of 615-655 nm respectively; and a color conversion efficiency of 130 n/W or larger.