JPS6134110B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electronic timepiece.

BACKGROUND ART Conventionally, electronic watches equipped with an alarm function and a local time function have been configured to switch and display the required functions on a single display section. Furthermore, since a counter for setting the alarm time and a counter for setting the local time are provided in common, there is a drawback that the alarm cannot be used when the local time is displayed. Therefore, it is necessary to constantly display the local time when traveling overseas, and in such cases, there are restrictions on the use of the alarm function. Furthermore, the alarm time is set to work only when it matches the time at the reference location, which is inconvenient when used overseas.

SUMMARY OF THE INVENTION Accordingly, the present invention provides an electronic timepiece that is capable of constantly displaying two appropriate types of time among a plurality of types of time, and that is capable of adjusting the appropriate time.

An embodiment of the present invention will be described below based on the drawings. 1 is a crystal oscillator, 2 and 3 are frequency dividers, and the output of frequency divider 3 generates a 1 Hz pulse. 4,5
4 is a counter that measures the time at the reference location; 4 is a counter that measures seconds; and 5 is a counter that measures minutes and hours. 6 is a counter for setting the time at which an alarm should be generated, and 7 is a counter for counting the minutes and hours of local time. 8
is a selection circuit that selects one of the time measurement outputs of the counters 5 and 7. Reference numeral 9 denotes a coincidence circuit for detecting coincidence of the outputs of the counter 6 and the selection circuit 8. 10 is a selection circuit that selects any one of the outputs of counters 5-7. 11 is the output of the selection circuit 8, and 12 is the output of the counter 4, which is the main display device 1.
This is a decoder/driver that converts the signal into a signal suitable for display on 3D. 14 is a decoder for displaying the output of the selection circuit 10 on the sub display device 15;
It's a driver. 16 is a switch that generates a pulse for correction by manual operation, and 17 is a switch that is locked during correction. Reference numeral 18 denotes a mode designation circuit that generates outputs designating each of the reference location time (hereinafter referred to as reference time) mode, alarm mode, and local time mode to terminals 18a, 18b, and 18c, respectively. Each mode is specified by selecting terminals a ₁ -a ₃ and terminals b ₁ -b ₃ by interlocking switches 19a and 19b constituting the mode selection switch 19. To specify the reference time mode, connect switches 19a and 19b to terminal a ₁
and b ₁ , the designation of alarm mode is connected to terminals a ₂ and b ₂ , and the designation of local time mode is connected to terminals a ₃ and b ₃ . In this way, two logical values are set by selecting two terminals, and a mode designation output is selectively generated. 20 is a switch for selecting whether to display the reference time or local time on the main display device 13; when connected to terminal a, the reference time is displayed; when connected to terminal b, the local time is displayed. 21 is an alarm generator, 22 is a chattering prevention circuit, 23, 23 is a resistor 24
44 are gate circuits, and 45 to 48 are inverters.

Next, the operation will be explained. In the following description, the case where the main display device 13 constantly displays the reference time is referred to as a zone, and the case where the local time is displayed is referred to as a zone.

First, the operation in the case of zone will be explained. When the switch 20 is connected to the zone selection terminal a, the gate circuits 25, 29, 33 and 36 are opened, and one input of the gate circuit 24 is held at the logic value "1". On the other hand, the logical value of the input P of the selection circuit 8 becomes "1", the output of the counter 5 is selected, and the hours and minutes of the reference time are displayed on the main display device 13 via the decoder/driver 11. Note that the second digit is always displayed on the main display device 13 via the decoder/driver 12 as the output of the counter 4 .

In this state, when the reference time mode is selected by the switch 19, a logic value "1" is generated at the terminal 18a of the mode specifying circuit 18, and the gate circuit 3
6, the decoder/driver 14 displays "OFF" on the width display device 15.

The reference time is corrected as follows.
The switch 17 is closed to produce a logic value "1" at the output of the gate circuit 24, and the frequency divider 3 and counter 4 are reset. On the other hand, the gate circuit 25 receives the logic value "1" from the mode specifying circuit 18 and produces an output of the logic value "1". Therefore, the gate circuit 38 is opened via the logic value "1" gate circuits 27 and 28, and the gate circuit 37 is closed. By repeatedly opening and closing the switch 16, pulses are supplied to the counter 5 via the gate circuits 38 and 39, and corrections are made while looking at the main display 13 until the desired time is reached.

The operation when alarm mode is specified is as follows. When the switch 19 is switched to produce a logic value "1" at the terminal 18b of the mode designation circuit 18, the selection circuit 10 selects the output of the counter 6 and sends an alarm to the sub-display device 15 via the decoder driver 14. The contents are displayed.
On the other hand, since one input logic value of the gate circuit 43 is "1", the gate circuit 43 is opened by closing the switch 17. Therefore, by repeatedly opening and closing the switch 16, pulses are supplied to the counter 6 via the gate circuit 43, so a predetermined alarm time is set while looking at the sub-display device 15. When time passes and the reference time and the set time of the counter 6 match, an output is generated to the matching circuit 9,
An alarm is generated from the alarm generating device 21 via the gate circuit 44.

The operation when the switch 19 is switched to specify local time mode is as follows. Since the logic value "1" is generated at the terminal 18c of the mode specifying circuit 18, the logic value "1" is generated at the output of the gate circuit 33, and the output of the counter 7 is selected to display the local time on the sub-display device 15. On the other hand, the output of terminal 18c opens gate circuit 32 via gate circuits 29 and 31. When the switch 17 is closed, the gate circuit 41 is opened and the gate circuit 40 is closed. Thereupon, the switch 16 is opened and closed to set the desired local time on the counter 7. When the switch 17 is opened, the gate circuit 40 is opened and a one-minute signal is supplied to the counter 7, which thereafter measures the time in that area.

Next, each operation when set to zone will be explained. When switch 20 is connected to terminal b, gate circuits 26, 30 and 35 are opened. Further, the input g of the selection circuit 8 becomes a logic value "1", the local time clock output is selected, and the hours and minutes are displayed on the main display device 13 via the decoder/driver 11. Note that the seconds digit continues to display that of the reference time. One reason for this type of display is that some countries do not publicly announce the time up to the seconds digit, and in such cases, if you switch to the seconds at the reference location, the local location This is because it becomes impossible to adjust the seconds.

Now, when the reference time mode is designated, a logic value "1" is generated at the outputs of the gate circuits 34 and 35, the selection circuit 10 selects the output of the reference time, and the sub display device 15 displays.

To correct the local time, close the switch 17 and input the logic value "1" to the gate circuit 32. Since the logic value "1" is generated at the outputs of the gate circuits 30 and 31, the gate circuit 41 is opened. .

Therefore, by opening and closing switch 16, the contents of counter 7 are modified.

The operation when alarm mode is specified is as follows. The selection circuit 10 selects the alarm output and displays it on the sub-display device 15, and the time is set by opening and closing the switch 16. In the case of zone designation, since the local time is output from the selection circuit 8, the alarm generator 21 generates an alarm when the alarm setting time coincides with the local time.

The above describes the operation when setting the alarm time in a zone, but when the alarm time set at the reference location does not need to be changed, for example when traveling from the reference location to a local location, it is possible to switch zones and You can set the alarm simply by selecting the alarm mode. Therefore, there is no need to reset the alarm time locally.

Next, when the local time mode is designated, the reference time is selected as the output of the selection circuit 10 and displayed on the sub-display device 15. In this state, the contents of the counter 5 are corrected by closing the switch 17 and opening and closing the switch 16.

In this embodiment, the counter 5 for the reference time and the counter 7 for the local time are corrected independently, but for example, in the zone state, the output of the reference time mode and the output of the zone are adjusted via an AND gate circuit. If this is input to the gate circuit 31, when the reference time is corrected, the local time counter 7 is also corrected at the same time. Therefore, once the local time is set, there is no need to adjust the local time again when the reference time is adjusted.

As described in detail above, in the present invention, an appropriate one of a plurality of times is displayed on the main display device, while an appropriate one of the remaining times is displayed on the sub display device. always displayed,
Additionally, other times, such as alarm time and local time, can be displayed on the sub-display device as needed, and can be compared with the display content on the main display device. Therefore, various times can be recognized in a composite manner, which is convenient in practice.

Further, by providing a correction means, it is possible to correct the display contents of one of the main and sub display devices while viewing the display contents of the other, which is particularly effective when used in the case of mutually related times.

[Brief explanation of the drawing]

The drawing is an electrical circuit diagram showing an embodiment of the present invention. 5...Counter, 6...Counter, 7...Counter, 8...First selection circuit, 10...Second selection circuit, 13...Main display device, 15...Sub display device, 18... Mode selection circuit, 19... switch, 20... switch.

Claims (1)

[Claims] 1. A timekeeping means for measuring two systems of time, the time at a reference location and a local time, a first selection means for selecting one system of time from the output of this timekeeping means, and a system based on the output of the first selection means. A main display device for displaying, an alarm setting means for setting an alarm time, a second selection means for selecting either local time or alarm time, and a sub-display for displaying based on the output of the second selection means. An electronic timepiece comprising a display device, a detection circuit for detecting coincidence between the output time of the first selection means and the alarm time, and a notification means for generating an alarm in response to the coincidence output of the detection circuit.