Analog electronic timepiece

Details Analog electronic timepiece Analog electronic timepiece

1979-09-24

1981-03-03

Jackmon, Edith S.

Horology: time measuring systems or devices

Chronological

With electro-optical display

368240, G04G 904

Patent

active

042544882

ABSTRACT:
Sixty strip-like phosphor display elements are formed on an insulated substrate to extend radially from its center at equiangular intervals, and inner and outer grids are disposed substantially concentrically with the radially extending phosphor display elements in opposing relation thereto. A thermo-electron emissive heater is disposed in opposing relation to the inner and outer grids on the opposite side from the phosphor display elements. A drive-display circuit provides, on a time-shared basis, a short hand display by selecting one of the phosphor display elements corresponding to an hours signal and applying a voltage to the inner grid alone, and provides a long hand display by selecting one of the phosphor display elements corresponding to a minutes signal and applying voltages to both the inner and outer grids.

REFERENCES:
patent: 3276200 (1966-10-01), Freeman
patent: 4103208 (1978-07-01), Washizuka

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