Quartz crystal timepiece

Details Quartz crystal timepiece Quartz crystal timepiece

1974-04-19

1976-03-30

Jackmon, Edith Simmons

58 23BA, G04B 1930, G04C 300

Patent

active

039465500

ABSTRACT:
A timepiece having a quartz crystal vibrator serving as a time standard, a liquid crystal display, and divider and driving circuits formed from COS/MOS transistors dividing the high frequency signal from the vibrator into low frequency timing signals for the direct driving of the liquid crystal display. The driving circuit includes a COS/MOS inverter directly coupled at its output to each liquid crystal display segment.

REFERENCES:
patent: 3715881 (1973-02-01), Girard
patent: 3750383 (1973-08-01), Kakizawa
patent: 3782103 (1974-01-01), Saito
patent: 3794990 (1974-02-01), Kishimoto

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