Planar alphanumeric display

Details Planar alphanumeric display Planar alphanumeric display

1979-03-19

1981-09-22

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

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

340759, 340765, G09F 932

Patent

active

042913071

ABSTRACT:
A display device for alphanumeric characters using a sixteen segment configuration for each character, eight segments in an outer ring and eight segments in an inner configuration. The segments are joined in an eight-by-two matrix which is multiplexed, there being two time intervals for each character. The display medium may be liquid crystal or any other known dual plane medium such as colloidal suspension. In one plane, the inner eight segments are multiplexed into one group, while a second group multiple extends to the external eight segments. In the other plane, each outer segment is connected in series with an inner segment to form eight segment pairs. To display a desired character, selected pairs in one plane are energized with either the inner or outer multiple during one time interval to illuminate all segments common to the selected pairs and the selected group. During a second time interval, other selected pairs are energized with the other group. Successive characters are driven sequentially.

REFERENCES:
patent: Re29727 (1978-08-01), Fujita
patent: 3760403 (1973-09-01), Kippenhan
patent: 3831166 (1974-08-01), De Nardo
patent: 4044280 (1977-08-01), Shulski
patent: 4142182 (1979-02-01), Kmetz

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