Electronic timepiece
US8644117B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2012 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Aug 29, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04R20/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic timepiece can improve the frequency of satellite signal reception and reduce power consumption. Such timepiece, e.g., a wristwatch has a GPS device that executes a reception process that locks onto a GPS satellite and receives satellite signals; a reception control unit that controls the reception process; and a solar panel that detects illuminance. The reception control unit includes an illuminance-based reception control unit that runs a reception process based on the detected illuminance, and a scheduled reception control unit that runs a reception process when a preset scheduled time is reached. The illuminance-based reception control unit stops reception when a satellite is not locked onto within a first locking time, and the scheduled reception control unit stops reception when a satellite is not locked onto in a second locking time that is shorter than the first locking time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.