Thermal-Switching of Optical Light Valves of Smectic Liquid Crystal for Printhead Applications
Original Publication Date: 1984-Dec-01
Included in the Prior Art Database: 2005-Feb-05
In reference [*] a smectic liquid crystal light valve is described wherein the basic structure is shown schematically in Fig. 1 above. A long horizontal strip of high resistivity indium tin oxide (ITO) is deposited on one transparent substrate to form a row electrode and contacted along edges with two metal electrodes (electrodes A and B). On the opposing transparent substrate, an array of separate column electrodes (low resistivity ITO fingers with contacting metal electrodes, is fabricated. In operation, a short voltage pulse is applied across electrodes A and B so that a current flows through the high resistivity ITO and heats the adjacent smectic liquid crystal to its isotropic (or nematic) phase.