ELECTRONIC TIMEPIECE, AND METHOD OF POWER SUPPLY AND TIME ADJUSTMENT THEREOF

Title:

ELECTRONIC TIMEPIECE, AND METHOD OF POWER SUPPLY AND TIME ADJUSTMENT THEREOF

Document Type and Number:

WIPO Patent Application WO/2000/017716

Kind Code:

A1

Abstract:

An electronic timepiece comprises an analog circuit (160) driven by a power supply (22), a logic circuit (170) driven by a voltage regulator (161) forming part of the analog circuit, an oscillator circuit (51) driven by the voltage regulator, a power supply switch (162) for cutting off power to all the analog circuits except the voltage regulator during a time adjustment, and a clock cut gate (171) capable of blocking the clock signal from the oscillator circuit to the logic circuit. Since the oscillator circuit and the voltage regulator are only operated during a time adjustment, the timepiece consumes less power but is accurate in time indication.

Inventors:

NAKAMURA HIDENORI (JP)
KOIKE KUNIO (JP)
SHIMIZU EISAKU (JP)

Application Number:

PCT/JP1999/005171

Publication Date:

March 30, 2000

Filing Date:

September 21, 1999

Export Citation:

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Assignee:

SEIKO EPSON CORP (JP)
NAKAMURA HIDENORI (JP)
KOIKE KUNIO (JP)
SHIMIZU EISAKU (JP)

International Classes:

G04C10/00; G04G5/00; G04G19/00; G04G19/12; (IPC1-7): G04C10/00; G04B1/10

Foreign References:

JPH0875874A	1996-03-22
JPH10300862A	1998-11-13
JPH085758A	1996-01-12
JPH0579493U	1993-10-29

Other References: