Patent ID: 7905605

Claim:
A projection system comprising: a first color channel that produces light having a first color, the first color channel comprising: a first light emitting diode that produces light having a first range of wavelengths; a second light emitting diode that produces light have a second range of wavelengths, the second range of wavelengths being different than the first range of wavelengths; a beam combining element positioned to receive the light having the first range of wavelengths and the light having the second range of wavelengths, the beam combining element combining the light having the first range of wavelength and the light having the second range of wavelengths to produce the light having the first color; a second color channel that produces light having a second color, the second color being different than the first color, the second color channel having at least one light emitting diode that produces light having a third range of wavelengths the third range of wavelengths is different than the first range of wavelengths and the second range of wavelengths, wherein the light having the second color comprises the light having the third first range of wavelengths; a first microdisplay positioned to receive and affect both the light having the first range of wavelengths and the light having the second range of wavelengths; a second microdisplay positioned to receive and affect at least the light having the third range of wavelengths; and a polarization based dichroic element positioned to receive the light having the first color from the first color channel and the light having the second color from the second color channel, the polarization based dichroic element configured to combine the light having the first color and the light having the second color after the light having the first range of wavelengths and the light having the second range of wavelengths are affected by the first microdisplay and the light having the third range of wavelengths is affected by the second microdisplay.