Electronic instrument

Details Electronic instrument Electronic instrument

1977-05-13

1979-02-13

Bauer, Edward S.

350338, 350347, 350352, 58 23C, G02F 113

Patent

active

041392795

ABSTRACT:
An electronic timepiece provides photo-electric cells disposed behind a passive electro-optic display cell for recharging a storage battery. The timepiece includes in its display a polarizer, a passive electro-optic device such as a liquid crystal, a quarter-wave plate, a cholesteric liquid crystal reflector and photo-electric cell arranged in superposition upon each other. Ambient light passing through the cholesteric reflector is used to energize the photo-electric cells which recharge the storage battery. Ambient light reflected by the cholesteric reflector is used to indicate the displayed information.

REFERENCES:
patent: 3630015 (1971-12-01), Lehovec
patent: 3823551 (1974-07-01), Riehl
patent: 4017156 (1977-04-01), Moriyama et al.
patent: 4032218 (1977-06-01), Scheffer

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