Numerical and non-numerical display system for a small calculato

Details Numerical and non-numerical display system for a small calculato Numerical and non-numerical display system for a small calculato

1978-08-09

1980-08-26

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

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

340762, 35 31R, G06F 314, G09F 932

Patent

active

042198089

ABSTRACT:
A numerical display system for use in a small calculator has a multi-digit numerical display device for selectively energizing a plurality of segments to display alphanumeric characters, first drive circuit for causing the numerical display device to display a denominator and a numerator at a time, and second drive circuit for causing a denominator-numerator distinction symbol to be displayed between the denominator and the numerator by the selective energization of the plurality of segments.

REFERENCES:
patent: 3626367 (1969-12-01), Howard et al.
patent: 3803834 (1974-04-01), Reese
patent: 3938318 (1976-02-01), Collins
patent: 3947976 (1976-04-01), Hafel
patent: 3999050 (1976-12-01), Pitroda
patent: 4044242 (1977-08-01), Laesser

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