Phosphor Development for α‐Silicon Liquid Crystal Light Valve Projection Display

This paper describes the development of a phosphor suitable for efficiently activating an α-silicon photoconductor. The photoconductor is employed to modulate a liquid crystal layer for use in a real-time television projection system. A thorough evaluation available phosphors disclosed their unsuitability for this use. The major requirement for this material is that : the spectral emission closely match the α-silicon responsivity curve, have sufficient radiance to activate the photoconductor efficiently, be resistant to thermal degradation, and exhibit fast decay