Solid-state display for time-piece

Details Solid-state display for time-piece Solid-state display for time-piece

1974-10-29

1976-06-01

Jackmon, Edith Simmons

Electric lamp and discharge devices

With temperature modifier

For lead-in-seal or stem protection

58127R, 313500, 340378R, 350160LC, G04B 1930, G04B 1906, H01J 6304

Patent

active

039599639

ABSTRACT:
The face of a watch or clock is made up of electro-optical devices, such as liquid crystal devices, arranged to present radial bars each divided into an inner segment and an outer segment and the segments can be illuminated by an electronic drive circuit having a time-base generator such as a quartz-crystal oscillator. The drive circuit has a time multiplex system for scanning the bars and selects segments for illumination such that a minute hand is simulated by illumination of both segments of a bar, an hour hand is simulated by illumination of an inner segment alone, and a seconds display is provided by illumination of the outer segments in turn.

REFERENCES:
patent: 3258906 (1966-07-01), Demby
patent: 3276200 (1966-10-01), Freeman
patent: 3540209 (1970-11-01), Latsky et al.
patent: 3691755 (1972-09-01), Girard
patent: 3765163 (1973-10-01), Levine

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