Digital liquid crystal electronic timepiece with color coded dis

Details Digital liquid crystal electronic timepiece with color coded dis Digital liquid crystal electronic timepiece with color coded dis

1976-08-10

1977-08-30

Schaefer, Robert K.

58 23R, 350160LC, G04B 1934

Patent

active

040445461

ABSTRACT:
Instead of having separate digital display means for seconds, minutes, hours, dates and months, an electronic timepiece uses the same liquid crystal display and differentiates between seconds, minutes, hours, dates and months by displaying each in a different color. This makes it possible to have the timepiece smaller and at the same time have the individual digits of the display larger and hence more easily legible. The different colors of the display are obtained by using a plurality of driving voltages for the liquid crystal display device and switching circuitry for applying the different drive voltages to the liquid crystal device according to whether seconds, minutes, hours, dates or months is to be displayed.

REFERENCES:
patent: 3922847 (1975-12-01), Culley et al.
patent: 3956880 (1976-05-01), O'Connor

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