Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
SATELLITE RADIO-WAVE WRISTWATCH
Document Type and Number:
WIPO Patent Application WO/2014/010646
Kind Code:
A1
Abstract:
The purpose of the present invention is to shorten the reception time required to perform time adjustment in a satellite radio-wave wristwatch. A satellite radio-wave wristwatch according to the present invention is provided with: an antenna for receiving satellite radio waves; a high frequency circuit; a satellite radio-wave receiver having a decoder circuit; a clock circuit which stores and clocks internal time; and a controller for controlling the timing of at least a time-information acquisition operation for acquiring time information using a satellite radio wave received by the satellite radio-wave receiver. In the time-information acquisition operation, the controller selectively executes, on the basis of an error estimation for the internal time, a shortened time-adjustment operation in which the time-information acquisition operation is ended at a stage when head information indicating the head of unit information is received, and the internal time is adjusted on the basis of the timing at which the head information is received, or a normal time-adjustment operation in which the time information is received, and the internal time is adjusted on the basis of the time information.

Inventors:
KATO AKIRA (JP)
Application Number:
PCT/JP2013/068909
Publication Date:
January 16, 2014
Filing Date:
July 10, 2013
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
CITIZEN HOLDINGS CO LTD (JP)
CITIZEN WATCH CO LTD (JP)
International Classes:
G04R20/06; G04G5/00
Foreign References:
JP2011226813A2011-11-10
JP2006162329A2006-06-22
JP2009053182A2009-03-12
JP2007271543A2007-10-18
JP2011112472A2011-06-09
JP2011043449A2011-03-03
JP2011226813A2011-11-10
Other References:
See also references of EP 2874028A4
Attorney, Agent or Firm:
HARUKA PATENT & TRADEMARK ATTORNEYS (JP)
Patent business corporation far international patent firm (JP)
Download PDF: