Timepiece receptive of a broadcast time-signal for correcting a time error
AssigneeSeikosha Co., Ltd.
InventorMoriyasu Ogiyama
Life of this patent
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Abstract
A timepiece for receiving a broadcast time signal containing correct time data for correcting a time error. A control circuit controls reception of the broadcast time signal depending on a time error. A current time is counted, and a time error dependent on the correct time data and the current time is determined for adjusting the current time. The reception of the broadcast time signal is controlled at intervals or times which are dependent on the time error obtained at a preceding adjustment operation so that the reception operation is executed only when necessary, thereby reducing power consumption.
Claims45
A timepiece receptive of a broadcast time signal for correcting a time error, comprising:
- receiving means for receiving a broadcast time signal containing correct time data;
- reception controlling means operative when activated for controlling the reception of the broadcast time signal by the receiving means;
- time counting means for counting a current time;
- adjusting means for determining a time error dependent on the correct time data and the current time and for adjusting the current time dependent on the time error;
- and
- a control circuit for determining a reception time dependent on the time error and for activating the reception controlling means to control the receiving means to receive the broadcast time signal at the determined reception time.
A timepiece receptive of a broadcast time signal for correcting a time error;
- comprising:
- receiving means for receiving a broadcast time signal containing correct time data;
- reception controlling means operative when activated for controlling the receiving means to receive the broadcast time signal;
- time counting means for counting a current time;
- adjusting means for determining a time error dependent on the correct time data and the current time and for adjusting the current time dependent on the time error;
- and
- a control circuit for determining a reception time depending on the time error and for activating the reception controlling means to control the receiving means to receive the broadcast signal at the determined reception time, the control circuit including means for determining whether the correct time data is sufficiently received, counting means for counting a number of times the correct time data is not sufficiently received, and comparing means for comparing the number of times the correct time data is not sufficiently received with a predetermined number, whereby the control circuit controls the adjusting means to determine the time error and to adjust the current time dependent on the correct time data if the correct time data is sufficiently received, and the control circuit controls the adjusting means to determine the time error dependent on a predetermined value if the number of times the correct time data is not sufficiently received exceeds the predetermined number.
A timepiece receptive of a broadcast time signal for correcting a time error, comprising:
- receiving means operative when activated for receiving a broadcast time signal containing correct time data;
- time adjusting means for counting a current time;
- adjusting means for determining a time error dependent on the correct time data and the current time and for adjusting the current time dependent on the time error;
- and
- controlling means for determining a reception time dependent on the time error and for activating the receiving means to receive the broadcast time signal at the determined reception time.
Dependencies are inferred from the claim text.