MULTI-PRIMARY LED PROJECTION SYSTEM

摘要

A multi-primary light emitting diode system 100 includes the use of a polarization based dichroic element 116 to combine light from different color channels 11OB, HOG. At least one of the color channels HOB includes two light emitting diodes 102B, 102BC that produce light with a different range of wavelengths. The use of the polarization based dichroic element 116 permits overlapping spectra from different color channels to be combined without loss. Accordingly, the brightness of the system is improved relative to conventional systems in which losses occur when combining overlapping spectra from different channels.