Horology: time measuring systems or devices – Plural timepiece system or system device – With wireless synchronization
Reexamination Certificate
2005-11-22
2005-11-22
Miska, Vit W. (Department: 2841)
Horology: time measuring systems or devices
Plural timepiece system or system device
With wireless synchronization
Reexamination Certificate
active
06967901
ABSTRACT:
A radio-controlled timepiece reduces unnecessary power consumption and improves energy conservation. The radio-controlled timepiece has a reception unit power supply controller43that regularly operates a reception power supply circuit24that drives a reception circuit22for receiving a radio signal containing time information. The reception unit power supply controller43has an elapsed time detector110for determining or measuring the elapsed time from the last time a signal was received, a reception schedule storage130for storing schedule information for supplying power, a schedule information setting-unit120for changing the schedule information to schedule information B with a longer power supply time interval than a default setting A if the elapsed time becomes greater than or equal to a set time, and a power supply circuit controller140that controls operation of the reception power supply circuit24based on the schedule information. Because the frequency of signal reception is reduced if the period in which signal reception is not possible increases, power consumption can be reduced.
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Miska Vit W.
Seiko Epson Corporation
Watson Mark P.
LandOfFree
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