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Patent Searching and Data


Title:
ELECTRONIC CLOCK
Document Type and Number:
Japanese Patent JP59079885
Kind Code:
A
Abstract:

PURPOSE: To easily and accurately set the display of a hand display part to electro-optical display, by supplying a fast feed signal to a motor drive circuit by the count value of a hand position memory means when a hand correcting mode is indicated.

CONSTITUTION: When a hand correcting mode is selected, one pulse signal is formed by an one-shot circuit 13a and inputted to the set terminal S of SR- FF 13b. As a result, the signal with frequency of 128Hg from a frequency dividing circuit 4 is sent to a motor drive circuit 14 and a motor 15 is driven in fast feed. This signal with frequency of 128Hg is also inputted to a hand position memory circuit 13 and, when the counting content of the hand position memory circuit 13 reaches the reference value of "12:00" or "0", a zero detection signal is outputted from a zero detection circuit 13m to stop fast feed driving. By this method, even if an electro-optical display part displays any time, hand display can be easily and accurately set to electro-optical display.


Inventors:
Yoshida, Masaru
Application Number:
JP1982000190494
Publication Date:
May 09, 1984
Filing Date:
October 29, 1982
Export Citation:
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Assignee:
CITIZEN WATCH CO LTD
International Classes:
G04C3/14; G04C3/00; G04C9/00; G04C9/08; G04C23/08; G04G5/02; G04G9/00; G04G13/02; G04C3/00; G04C9/00; G04C23/00; G04G5/00; G04G9/00; G04G13/00; (IPC1-7): G04C3/00; G04C9/08