JPS5530669A - Electronic watch - Google Patents

Electronic watch

Info

Publication number
JPS5530669A
JPS5530669A JP10421578A JP10421578A JPS5530669A JP S5530669 A JPS5530669 A JP S5530669A JP 10421578 A JP10421578 A JP 10421578A JP 10421578 A JP10421578 A JP 10421578A JP S5530669 A JPS5530669 A JP S5530669A
Authority
JP
Japan
Prior art keywords
signals
counted
frequency
reset
power source
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
JP10421578A
Other languages
Japanese (ja)
Inventor
Tsuneo Yamazaki
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Priority to JP10421578A priority Critical patent/JPS5530669A/en
Publication of JPS5530669A publication Critical patent/JPS5530669A/en
Pending legal-status Critical Current

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  • Electric Clocks (AREA)

Abstract

PURPOSE: To make the stepwise adjustment possible, while minimizing the mechanical operations, by using a commercial AC power source as the standard time signals for the stepwise adjustment.
CONSTITUTION: The signals of an oscillatory circuit, which is composed of an inverter 1 and a crystal oscillator Q1, are frequency divided at FF 5 to 8 and fed as a standard signals of one second to a liquid crystal display drive circuit 28. A photodiode 26 attached to the dial of a watch detects the light quantity of a lamp 27, which is to be lit by an AC power source 29 by the connection of a mechanical switch 25, and the detected output is counted at 22 to reset an FF 21 at a preset counted value. Then, a gate 4 is turned off so that the counted values of FF 12 to 14 indicate the frequency error of the oscillating circuit. At each eight seconds, the contents of the FF 5 to 7 and the FF 12 to 14 are compared at 15 to 17. When coincidence takes place, the FF 5 to 7 are reset so that the error in the oscillated frequency can be corrected.
COPYRIGHT: (C)1980,JPO&Japio
JP10421578A 1978-08-25 1978-08-25 Electronic watch Pending JPS5530669A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10421578A JPS5530669A (en) 1978-08-25 1978-08-25 Electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10421578A JPS5530669A (en) 1978-08-25 1978-08-25 Electronic watch

Publications (1)

Publication Number Publication Date
JPS5530669A true JPS5530669A (en) 1980-03-04

Family

ID=14374726

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10421578A Pending JPS5530669A (en) 1978-08-25 1978-08-25 Electronic watch

Country Status (1)

Country Link
JP (1) JPS5530669A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5530200A (en) * 1979-09-03 1980-03-03 Susumu Kiyokawa Plane heater
JPS57143597U (en) * 1981-03-03 1982-09-09
JPS58135484A (en) * 1982-02-05 1983-08-12 Seikosha Co Ltd Ac synchronizing crystal watch

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5530200A (en) * 1979-09-03 1980-03-03 Susumu Kiyokawa Plane heater
JPS5531598B2 (en) * 1979-09-03 1980-08-19
JPS57143597U (en) * 1981-03-03 1982-09-09
JPS58135484A (en) * 1982-02-05 1983-08-12 Seikosha Co Ltd Ac synchronizing crystal watch
JPH0236914B2 (en) * 1982-02-05 1990-08-21 Seikosha Kk

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