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Title:
RADIO-CONTROLLED WRISTWATCH
Document Type and Number:
WIPO Patent Application WO/2013/021899
Kind Code:
A1
Abstract:
A radio-controlled wristwatch includes: a receiving means (11) that receives radio waves from a satellite and extracts both information to determine an intra-week time and information to determine a week; a clocking means that clocks a current day and time; a day-and-time correcting means that corrects the current day and time as clocked by the clocking means; a week-information holding means that holds the information to determine the week; a week-information updating means that updates, on the basis of the current day and time as clocked by the clocking means, the to-determine-the-week information held by the week-information holding means; and a week-information reception restricting means that restricts the reception of the to-determine-the-week information by the receiving means and that causes the receiving means to receive the to-determine-the-week information in a predetermined case. Because of that inclusion, the radio-controlled wristwatch, which receives, from the satellite in the Global Positioning System, the radio waves including the time information, can reduce the power consumption required for that reception.

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Inventors:
KATO AKIRA (JP)
Application Number:
PCT/JP2012/069624
Publication Date:
February 14, 2013
Filing Date:
August 01, 2012
Export Citation:
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Assignee:
CITIZEN HOLDINGS CO LTD (JP)
CITIZEN WATCH CO LTD (JP)
KATO AKIRA (JP)
International Classes:
G04G5/00; G01S19/34
Foreign References:
JP2007271543A2007-10-18
JP2009145318A2009-07-02
JP2009053182A2009-03-12
JP2010203856A2010-09-16
JP2006105621A2006-04-20
JP2009168620A2009-07-30
Other References:
See also references of EP 2743784A4
Attorney, Agent or Firm:
HARUKA PATENT & TRADEMARK ATTORNEYS (JP)
Patent business corporation far international patent firm (JP)
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Claims:



 
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