Display device

Details Display device Display device

1977-07-07

1979-05-22

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

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

313190, 313496, 313519, H01J 1748

Patent

active

041562399

ABSTRACT:
A display device especially adapted for use in pocket-sized electronic calculators has upper and lower display stages for simultaneously displaying operands. In one form shielding device is provided in order to avoid the interference between the upper and lower display stages. In addition, a variety of intraconnections among the segments, grids and cathode filaments ensures the uniformity of display brightness among the digits.

REFERENCES:
patent: 3666981 (1972-05-01), Lay
patent: 3780326 (1973-12-01), Raago
patent: 3849694 (1974-11-01), Harvey et al.
patent: 3868535 (1975-02-01), Kupsky
patent: 3903448 (1975-09-01), Kuchinsky et al.
patent: 4047072 (1977-09-01), Kishino et al.
patent: 4047073 (1977-09-01), Kishino

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