BIREFRINGENT FILTER-BASED COLOR GENERATION SCHEME FOR A PASSIVE MATRIX DISPLAY DEVICE

摘要

A full color LC display of passive matrix design (100) includes a polarizer (16), an analyzer (17) having a transmission axis, and at least one light generation stage positioned between the polarizer (16) and analyzer (27) for transmitting light of a desired wavelength to the analyzer (17). This light generation stage (10) includes a first retarder stack that rotates desired wavelengths of light to a particular polarization state, a second retarder stack inverted and rotated by 90 degrees with respect to said first retarder stack, and a passive matrix addressed optical element positioned between the first and second retarder stacks. The retardation and orientation of each of the first retarder stack, second retarder stack, and passive matrix addressed optical element are optimized so as to provide a color generation stage placing desired wavelengths of light substantially along the transmission axis of the analyzer (17).