The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 19, 2016
Filed:
Jul. 10, 2013
Citizen Holdings Co., Ltd., Tokyo, JP;
Citizen Watch Co., Ltd., Tokyo, JP;
Akira Kato, Sayama, JP;
CITIZEN HOLDINGS CO., LTD., Tokyo, JP;
CITIZEN WATCH CO., LTD., Tokyo, JP;
Abstract
A reception time period required for time adjustment is reduced in a satellite radio-controlled wristwatch. A satellite radio-controlled wristwatch according to the present invention includes: a satellite radio wave reception unit including an antenna for receiving a satellite radio wave, a high frequency circuit, and a decoder circuit; a clock circuit for holding and counting an internal time; and a controller for controlling a timing of at least a time information acquisition operation of acquiring time information from the satellite radio wave received by the satellite radio wave reception unit, the controller being configured to selectively execute, in the time information acquisition operation, based on error evaluation of the internal time: a shortened time adjustment operation of ending the time information acquisition operation at a stage at which head information representing a head of unit information is received, and adjusting the internal time based on a timing at which the head information is received; and a normal time adjustment operation of receiving the time information, and adjusting the internal time based on the time information.