Smectic a Liquid-Crystal Light Valves for Electrophotographic Printheads
Original Publication Date: 1989-Aug-01
Included in the Prior Art Database: 2005-Jan-30
Smectic A Liquid-Crystal (SALC) light valves can be constructed for use in high speed electrophotographic printhead applications. The smectic A LC has to be biased at a suitable elevated temperature so that the radiation and the conduction losses of the SALC printhead are fast enough to compensate the heating of few watts due to the operation of the SALC light valve. Smectic A LC with suitable smectic A-to-isotropic-transition temperature can be obtained from eutectic mixtures of LC compounds.