G - Physics
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58/22, 345/8
G04G 9/02 (2006.01) G01R 13/40 (2006.01) G02F 1/1343 (2006.01) G04G 9/06 (2006.01) G09G 3/20 (2006.01)
Patent
CA 1138211
ABSTRACT An analogue display includes an electrically sensitive medium enclosed between two sets of electrodes. The two sets of electrodes are registered and overlap to provide background and one or more shaped index character, each at a plurality of selectable positions. Voltage signals are applied to the elec- trodes so that the medium is held in an OFF state in the region between selected electrodes, whilst simultaneously voltage signals are applied so that in other regions of the medium, the medium is in an ON state. The medium may be of liquid crystal, electroluminescent or gaseous material. One set of electrodes may have a meander configuration, the other set a segmented configuration. The index character or characters may be displayed at one, two or three positions, each character being of different shape, for meter or timepiece applications. The voltage signals applied may be binary coded and in preference pseudo-random sequence binary codes.
344398
Fetherstonhaugh & Co.
National Research Development Corporation
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