Time measurement device and method of controlling the time measurement device
US7079451B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 11, 2003 |
| Grant date | Jul 18, 2006 |
| Priority date | — |
| Expiry date | Sep 15, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04R20/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A time measurement device includes a power generator 2, secondary power source 31, current time counters 922 and 932, receiver circuit 42 for receiving a time standard radio wave, time display means 5 for displaying the current time, power detector 83 for outputting a power detection signal when the power generator 2 is in a power generating state or when a voltage stored in the secondary power source 31 is at a predetermined voltage value, operation mode switcher 874 switching, in response to the power detection signal, between a power saving mode in which time display is suspended and a standard mode in which time display is not suspended. The operation mode switcher 874 causes the time display means 5 to display the current time based on the time information counted by the time counters 922 and 932 and the time information received by the receiver circuit in response to the device being switched from the power saving mode to the standard mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.