Method and apparatus for driving electrochromic display device

Details Method and apparatus for driving electrochromic display device Method and apparatus for driving electrochromic display device

1976-07-13

1977-12-06

Weldon, Ulysses

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

58 855, 58 23R, 340336, 350160R, G04B 1934

Patent

active

040609758

ABSTRACT:
An electronic timepiece in which a high frequency signal from a frequency standard is divided down to a low frequency signal by a frequency converter. A decade decimal counter is connected between the frequency converter and a time counter to generate first, second and third phase signals in response to the low frequency signal from the frequency converter. The time counter is responsive to the first phase signal to gradually increment the count value therein, and is arranged such that it generates a reference time information signal prior to current time. First and second memory circuits are arranged to receive an output from a decoder in which the reference time information signal is converted into code format. The first and second memory circuits are responsive to the second and third phase signals from the decade decimal counter and to the coded signals from the decoder to generate bleaching signals and coloration signals, respectively, prior to current time.

REFERENCES:
patent: 3839857 (1974-10-01), Berets et al.
patent: 3950936 (1976-04-01), Oguey et al.
patent: 3968639 (1976-07-01), Berets et al.
patent: 3987433 (1976-10-01), Kennedy
patent: 4006585 (1977-02-01), Tamaru et al.

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