| 摘要 |
An illumination device (100) includes a plurality of Light Emitting Diodes (LEDs (102) ) in a rectangular light mixing cavity (109) mounted above the LEDs (102) and configured to mix and color convert light emitted from the LEDs (102). The long sidewall surfaces (1071) of the rectangular light mixing cavity (109) are coated with a first type of wavelength converting material while the short sidewall surfaces (107s) reflect incident light without color conversion. The output window (108) that is above and separated from the LEDs (102) is coated with a second type of wavelength converting material. The light mixing cavity (109) may include a replaceable, reflective insert that includes a non-metallic, diffuse reflective layer (124) backed by a second reflective layer (124). Additionally, the LEDs (102) may be mounted on raised pads (104pad) on a mounting board (104). The light mixing cavity (109) may include a bottom reflector (106) with holes wherein the raised pads (104pad) elevate the LEDs (102) above the top surface of the bottom reflector (106) through the holes. |
