Skip to Main Content The paper is concerned with the problem of
generating complex patterns on two-dimensional liquid-crystal
arrays, without either an excessive number of control terminals
or prohibitively complex control circuits. Following a brief
introduction to the operating principles of liquid-crystal
displays, the initial Section indicates how the problem could be
solved using a two-dimensional shift-register/liquid-crystal
sandwichÂ¿if the technology were available. Succeeding Sections
then derive and analyse efficient ways of arranging and driving
sets of parallel X and Y conductors to generate desired display
patterns. Particular attention is given to the examples of
generating arrays of 7Ã5 dot matrix symbols, and of generating
single two- or three-valued waveform displays. Drive sequences
within the response speed of the liquid crystals are shown to be
feasible for character displays, and to have the advantage of
simplicity and tolerance to variations in operating conditions.
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