JPS55107975A - Electronic watch - Google Patents

Electronic watch

Info

Publication number
JPS55107975A
JPS55107975A JP1577479A JP1577479A JPS55107975A JP S55107975 A JPS55107975 A JP S55107975A JP 1577479 A JP1577479 A JP 1577479A JP 1577479 A JP1577479 A JP 1577479A JP S55107975 A JPS55107975 A JP S55107975A
Authority
JP
Japan
Prior art keywords
counter
moon
age
display unit
drive signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1577479A
Other languages
Japanese (ja)
Inventor
Toyota Narita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Citizen Watch Co Ltd
Original Assignee
Citizen Watch Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Priority to JP1577479A priority Critical patent/JPS55107975A/en
Publication of JPS55107975A publication Critical patent/JPS55107975A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G9/00—Visual time or date indication means
    • G04G9/0076—Visual time or date indication means in which the time in another time-zone or in another city can be displayed at will

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Electric Clocks (AREA)

Abstract

PURPOSE:To indicate quasi-periodic phenomonon such as the moon's age on an analog display unit of a digital watch by forming a drive signal for correcting the accumulated error due to irregular period. CONSTITUTION:The frequency of a standard oscillator 1 is divided by a frequency divider 2 to display the time through an hour counter 3 on a digital display unit 12 and simultaneously count the output from the counter 3 at a calendar counter 4 to display the calendar indication. A control circuit 5 obtains the moon's age in predetermined calculation from the signal of the counter 4, and calculates the error correcting amount when discriminating the transfer of the months in solar calendar. A drive signal forming circuit 6 forms a drive signal corrected according to the calculated result, and supplies it to a step motor 9 to indicate the hand 11 on analog indication. Thus, the quasi-periodic phenomenon can be indicated as the moon's age on analog display unit of a digital watch.
JP1577479A 1979-02-14 1979-02-14 Electronic watch Pending JPS55107975A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1577479A JPS55107975A (en) 1979-02-14 1979-02-14 Electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1577479A JPS55107975A (en) 1979-02-14 1979-02-14 Electronic watch

Publications (1)

Publication Number Publication Date
JPS55107975A true JPS55107975A (en) 1980-08-19

Family

ID=11898147

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1577479A Pending JPS55107975A (en) 1979-02-14 1979-02-14 Electronic watch

Country Status (1)

Country Link
JP (1) JPS55107975A (en)

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