Liquid crystal and numerical display devices

Details Liquid crystal and numerical display devices Liquid crystal and numerical display devices

1980-01-15

1982-07-27

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340758, 340762, 340765, G09G 304

Patent

active

043420311

ABSTRACT:
Liquid crystal, plasma cathode glow type or other materials visibly changeable by electrical actuation are provided with a set of generally circular shaped electrodes registering on opposite sides of a display panel and connected by a set of conductors serves to select decimal and alphameric numbers and symbols from subsets of as few as twelve side-by-side element positions. The character presentation in a pleasing and flexible style such as scroll is feasible because the elements form substantially equilateral triangles with adjacent elements.
Simplified electronic coding and switching circuits are possible by use of fewer element areas in a set to form characters. The arrays may be continuously energized with a thirteen lead version with individual conductors to each element or may be cyclically pulsed with a four by four, five by three, etc. matrix conductor pattern of wires on opposite sides of the material.
Auxiliary indication is visible through the crystal transparency and contrast-visibility of liquid crystal embodiments is enhanced by techniques including circular element shapes in a side-by-side array. Ease of manufacturing is afforded because of few conductors necessary and the elimination of thin conductor patterns and long conductors meandering over circuitous paths.

REFERENCES:
patent: Re29033 (1976-11-01), Lapeyre
patent: 849226 (1907-04-01), Garrett
patent: 2064964 (1936-12-01), Wickes
patent: 3076187 (1963-01-01), Bichell et al.
patent: 3368290 (1968-02-01), Loeb
patent: 3872463 (1975-03-01), Lapeyre
patent: 4112424 (1978-09-01), Lapeyre

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