US 5,537,101 AGranted

Time data receiving apparatus

AssigneeCasio Computer Co., Ltd.

InventorsShuji Nakajima, Nobuyuki Shiina, Makoto Nakagawa, Hideki Ogawa

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Abstract

When the current time data in current time counting device has been corrected on the basis of the current time data transmitted over radiowaves, it is judged whether or not an alarm time is present between the time data before correction and the time data after correction. If an alarm time is present, the user is informed of the alarm time. This avoids the problem of failing to inform the user of the alarm time at that day. Furthermore, the correspondence between the current time data in the current time counting device and the time data in different functional device is prevented from changing as follows when the current time data has been corrected on the basis of the received time data, the time data in the different functional device is also corrected as much as the same correction time, or while the different functional device is operating, the time correcting operation is prevented from being carried out even if the time correction timing has been reached.

Claims8

Dependent claims

A time data receiving apparatus comprising:

current time counting means for counting current time data;
alarm time data storage means for storing alarm time data;
coincidence sensing means for comparing the current time data in said current time counting means with said alarm time data to sense coincidence between them;
first informing means for informing an alarm time when coincidence has been sensed by said coincidence sensing means;
receiving means for receiving radiowaves including time data and for obtaining reception time data from the radiowaves;
correction means for correcting the current time data in said current time counting means on the basis of the reception time data obtained by said receiving means;
judging means for judging whether or not an alarm time corresponding to said alarm time data is not informed on that day and the current time data after correction exceeds the alarm time corresponding to said alarm time data, when the current time data in said current time counting means has been corrected by said correction means;
and
second informing means for performing an informing operation when said judging means judges that the alarm time corresponding to said alarm time data is not informed on that day and the current time data after correction exceeds the alarm time corresponding to said alarm time data.

6 more elements

A time data receiving apparatus comprising:

current time counting means for counting current time data;
receiving means for receiving radiowaves including time data and for obtaining reception time data from the radiowaves;
correction means for correcting the current time data in said current time counting means on the basis of the reception time data obtained by said receiving means;
a start switch;
timer means for starting a countdown operation of preset time data in response to an operation of said start switch and for informing of an alarm time when the time data becomes zero;
correction time sensing means for sensing a correction time corresponding to a corrected amount of time when the current time data in said current time counting means has been corrected by said correction means;
and
compensation means for compensating the time data from said timer means by the correction time sensed by said correction time sensing means when the current time data from said current time counting means has been corrected by said correction means during the countdown operation of said timer means.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/344,160Filed 23 Nov 1994
Priority: JP 5-3398947 Dec 1993
Granted: 16 Jul 1996
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

G04G 13/02
Producing acoustic time signals: at preselected times, e.g. alarm clocks
G04R 20/10
The radio signal being broadcast from a long-wave call sign, e.g. DCF77, JJY40, JJY60, MSF60 or WWVB: tuning or receiving; Circuits therefor
G04R 20/12
The radio signal being broadcast from a long-wave call sign, e.g. DCF77, JJY40, JJY60, MSF60 or WWVB: decoding time data; Circuits therefor
G04G
Electronic time-pieces