Digital watch with liquid crystal display

Details Digital watch with liquid crystal display Digital watch with liquid crystal display

1974-10-17

1976-11-16

Jackmon, E. S.

Buckles, buttons, clasps, etc.

58 50R, 58 58, 240 643, 340336, G04B 1924, G04B 1930, G04C 1702, H05B 3500

Patent

active

039915522

ABSTRACT:
A digital watch system includes a crystal controlled oscillator with frequency division which controls a set of counters, each counter carrying coded horological data. Selected counter set data is multiplexed into a seven segment decoder. The decoder output is demultiplexed into memories, one for each of the segments in each of the display digits. The memories control segment drivers for the liquid crystal digital displays.

REFERENCES:
patent: 3765163 (1973-10-01), Levine et al.
patent: 3823551 (1974-07-01), Riehl

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