Methods for measuring performance of LcoS microdisplays

摘要

Liquid-crystal-on-silicon(LCoS)microdisplays have unique measurement requirements not shared by direct-view flat-panel displays. We developed a series of measurement techniques for measuring reflectance, contrast ratio, and uniformity of LCoS microdisplays. Reflectance is deter- mined by comparing light reflected off of the microdisplay in its "white" state with that reflected off of a calibrated mirror. Several corrections are applied to take into account polarization differences between the reference measurement and display measurements. Contrast ratio is determined by meas- uring display reflectance in the "white" and "black" states.