Title:
電波修正時計
Document Type and Number:
Japanese Patent JP4469221
Kind Code:
B2
Abstract:
To make a time instant correction possible while suppressing an electric power consumption due to a reception of radio wave containing a time instant information. When a reception means has been made into its operation state in order to receive the radio wave containing plural markers disposed in predetermined positions and the time instant information, in a case where the marker initially received has been a reference marker M corresponding to an exact minute position, the time instant information is obtained by continuing the reception intact, and a time instant of a clock means is corrected and displayed to a display means. When the marker initially detected has been a position marker P, the reception means is made into its non-operation state. After 9 seconds from this point in time, the reception means is made again into the operation state in order to receive the reference marker M appearing after a constant time. This operation is repeated till the reference marker M can be detected, thereby performing the time instant correction.
Inventors:
Nobutaka Saito
Application Number:
JP2004148935A
Publication Date:
May 26, 2010
Filing Date:
May 19, 2004
Export Citation:
Assignee:
Seiko Instruments Inc.
International Classes:
G04G5/00; G04R20/00; G04R20/08; G04R60/14; H04B7/212
Domestic Patent References:
| JP2545622B2 | ||||
| JP2002277574A | ||||
| JP7198878A | ||||
| JP2503376B2 |
Attorney, Agent or Firm:
Kentaro Kuhara
Noriaki Uchino
Nobuyuki Kimura
Noriaki Uchino
Nobuyuki Kimura