A liquid crystal light valve is provided with a microgrid of grooves in the photoconductor surface to divide the photoconductor into high resolution pixels. The liquid crystals fill the grooves to seal them and contribute to a potential barrier at the grooves that prevents lateral charge migration between...http://www.google.de/patents/US4913531?utm_source=gb-gplus-sharePatent US4913531 - Liquid crystal light valve with grooved microgrid and method of forming the same
