JPS5818633B2 - Hizukehiyoujisouchi - Google Patents

Abstract

The time piece allows the current time, day and month in several time zones around the world to be displayed. The time piece has a counting circuit, which counts seconds, minutes, hours, days and months after the reception of a signal from a pulsed oscillator. A time-shift control circuit for changing the date of the last day of a given month to the first day of the next month according to the calendar permits the display of a special symbol in order to indicate that the day of the selected region is a last day of the preceding month. This has dispensed in an uncomplicated way with the determination of the last day of the preceding month and simplified the circuit of the time piece. <IMAGE>

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a date display device that effectively displays the last day of the previous month, particularly in a watch that displays local time in areas with time differences.

Watches often display the date as well as the current time.

It is also conceivable that a clock could specify a region with a time difference, correct the time difference, and display the local time of that region.

However, when displaying the local time in an area with this time difference, the date often changes with the time, and in reality, the date must be corrected as well as the time difference.

For example, in the case of an electronic watch that counts clock pulses, this can be done by correcting the time difference in the counting circuit for the hour unit and correcting the count value in the date counting circuit. If you want to know the Honolulu time when it is 1A, it is the last day of February in Honolulu,
In addition to correcting the month, it is necessary to determine what day the last day of the previous month is, and to set the count value in the date counting circuit in accordance with the determined date.

However, this makes the configuration complicated and not effective.

This invention was made in view of the above points, and aims to provide a date display device that can effectively switch and display the last day of the previous month and effectively configure a time difference clock. An example thereof will be explained.

In FIG. 1, the reference clock signal from the oscillation circuit 11 is converted into a count signal of 1 pulse per second (lp/1sec) by the frequency dividing circuit 12, and this Ip/sec signal is 6
The carry signal every minute obtained from this counting circuit 13 is coupled to a 0-base "second" counting circuit 13 as a counting step signal, and the carry signal obtained from this counting circuit 13 is sent to a decimal-base counting circuit 14 that counts the single digit part of the "minute". Further, the carry signal of the counting circuit 14 is supplied as a step signal to the counting circuit 15 which counts the two-digit part of the minute.

A carry signal is generated from this counting circuit 15 every hour, and this signal is supplied to a 12-decimal "hour" counting circuit 16 as a counting step signal. The carry signal every 12 hours from 1 to 2 is converted into a signal every 24 hours via a binary counting circuit 17, and is coupled to a 31-decimal "date" counting circuit 18.

The signal from this "date" counting circuit 18 is used to count and control the decimal "month" counting circuit 19, and the "date" and "month" counting circuits 18 and 19 are controlled by the month/day control circuit 20. It is controlled according to the calendar from the last day of the month to the first day of the next month, and the count value generated by the step signal given from the "date" counting circuit 18 to the "month" counting circuit 19 is the dog month,
The count value of the "date" counting circuit 18 is preset controlled to "1" when the "month" counting circuit 19 is incremented. to ensure accurate counting control at all times.

In this case, a leap year command is also given to the month/day control circuit 20 as necessary, and in February of a leap year, a counting increment command is sent from the "date" counting circuit 18 to the "month" counting circuit 19 after 29 days of counting. Try to give.

That is, the counting circuits 13 to 19 constitute a counting circuit, and the counting circuits 14 to 16 corresponding to "minutes" and "hours" and the counting circuits 18.1 to "date" and "month"
Each count value signal of 9 is supplied to the display switching circuit 21,
The time count value of "hour" and "minute" selected for switching, or "
The display section 22 is driven by the signals of the count values of month and date to display the time or date and month.

Also, depending on the count value of the counting circuit 17, the AM and PM display sections 2
Control the display of 3.

In addition, signals from a time correction control circuit 24 are coupled to the above-mentioned clock counting circuit, and this correction control circuit 24 has signals such as "sand,""minute,""1o'clock," and "date." ” and “month” respectively from switches 81 to S5 are combined.

Then, by the signal of the switch Si, the "sand" counting circuit 13
is cleared, and counting circuits 14.16 and 18.19 are incremented in response to the respective operations of switches 82 to S.
The count values of these counting circuits 14, 16, 18, and 19 are corrected, and the time etc. are corrected.

From the frequency dividing circuit 12, a signal with a sufficiently faster period is extracted and supplied to the timing and control signal generating circuit 25.

This signal generation circuit 25 generates a clock pulse Φe for driving circuit control and a number of control pulse signals set corresponding to this clock pulse Φe. It is supplied to the correction control circuit 24 as a control drive signal and to the time difference control circuit 26 as a drive control signal.

The time difference control circuit 26 is coupled with a region designation signal from the switch S6, displays the designated region name on the region display section 2γ, and displays a time difference signal set in relation to the local time of the designated region. is coupled to the "hour" counting circuit 16.

The display switching circuit 21 is switched and controlled by operating the switch S7, and displays one of the counted values of the time, month, and date on the display section 2.
Combine with 2.

Figure 2 shows the 26 parts of the time difference control circuit in more detail. This shows the case where the local time is displayed, and the region display section 2γ is provided with indicators 27a to 27h with the above-mentioned rankings set corresponding to each of the above cities, and the display units 27a to 27h correspond to each of the above-mentioned cities. The city name will now be listed.

The time difference control circuit 26 includes displays 27a to 27h.
An octal counter 28 with a count value output line set corresponding to each is provided, and this counter 28 is connected to the switch S6.
The count is incremented for each operation, and a city can be specified.

That is, the operation signal of the switch S6 is coupled in series to delay circuits 29 and 30 formed of delayed flip-flops or the like that operate in synchronization with the clock pulse Φe, and
Impark 31 is connected to the output side of delay circuit 30, the output signal of delay circuit 29 and the output signal of inverter 31 are coupled to AND circuit 32, and when switch S6 is inserted, clock pulse Φe-Φθ is output from AND circuit 32. A one-shot pulse signal is generated that is output with a certain width, and the counter 28 is incremented at the timing of the trailing edge of the one-shot pulse signal from the AND circuit 32.

The signals of each count value from the counter 28 are sent to the AND circuits 33a to 33a together with the signals from the AND circuit 32, respectively.
33h, and this AND circuit 33a to 33
The output signal from h is led as a counting signal to the "hour" counting circuit 16 shown in FIG. 1 via the OR circuit 34.

- Also, the timing and control signal generation circuit 25
Now, the signal from the frequency dividing circuit 12 is appropriately divided and counted to generate a clock pulse Φe as shown in A of FIG. -1 shot, 2 shots, 3 shots, 5 shots, as shown in F.
Generates 30 counting pulse signals.

Then, one counting pulse signal is sent to an AND circuit 33e,
At 33h, the two signals are sent to AND circuits 33b and 33f,
The three signals are coupled to the AND circuit 33c, the five signals are coupled to the AND circuits 33a, 33d, and 33g, and the thirty counting pulse signals are supplied to the date control circuit 20.

Also, the count value “0” corresponding to “Tokyo” on the counter 28
The signal A is supplied to the AND circuit 35 together with the output signal from the AND circuit 32, and the signal A from the AND circuit 35 is
is coupled to the date control circuit 20 as a command signal.

FIG. 4 shows the parts related to the month/day control circuit 20 in more detail, and the "date" counting circuit 18 is divided into a decimal counting circuit 18a and a quaternary counting circuit 16b. do.

Then, the count signal of the counting circuits 18a, 18h, which is a 4-bit signal, for example, is coupled to the date detection circuit 36.
The date end detection signals for each of the 28th, 29th, 30th, and 31st are extracted.

Also, from the “month” counting circuit 219, “February” and “
Count value signals corresponding to small months such as April, June, September, and November are detected.

The "31st" detection signal from the date detection circuit 36 is supplied to OR circuits 37 and 38, and the signal from the OR circuit 37 is sent to the counting circuit 18a as a set command to set the count value to "1". It is given as a command to set the counting circuit 18b to "0".

That is, the date is set to "1st" by the output signal from the OR circuit 37.

Further, the output signal from the OR circuit 38 is an AND circuit.

39 to the OR circuit 37 and OR circuit 40, and the output signal of the OR circuit 40 is supplied to the "month" counting circuit 19 as a counting step signal.

The "month" correction signal from the correction control circuit 24 described above is coupled to the OR circuit 40.

Also, and. The output signal from the inverter 41 to which the signal A from the time difference control circuit 26 shown in FIG. 2 is coupled is applied to the circuit 39 as a gate signal.

Furthermore, “30th” and “29th” from the date detection circuit 36
The respective detection signals for "28th" are AND times.

42, 43, 44, and the AND circuits 42 to 4.
The output signal from 4 is led to an OR circuit 38.

The small column detection signal from the counting circuit 19 is applied as a gate signal to the AND circuit 42, and the February detection signal is also applied as a gate signal to the -1-AND circuits 43 and 44.

Further, a leap year command is coupled to the AND circuit 43, and an output signal of the inverter 45 is coupled to the AND circuit 43.

The output signal of the impark 41 is further applied as a gate signal to the AND circuit 46 to which the signal from the counting circuit 17 is combined, and the output signal from the AND circuit 46 is sent as a counting step signal to the counting circuit 18a via the OR circuit 47. Supply as.

The OR circuit 47 receives a date correction signal from the correction control circuit 24 by the switch S5, and an AND circuit 48.4.
The signal from 9 is also coupled, and the gate of the AND circuit 48 is opened when the flip-flop circuit 50 is set.
Outputs clock pulse Φe.

The flip-flop circuit 50 is set by a signal obtained from the counting circuit 17 via the AND circuit 53, and reset by the output signal of the AND circuit 48.

The signal A from the time difference control circuit 26 is also input to the AND circuit 53.

Further, the AND circuit 49 is coupled with the signal A1 from the time difference control circuit 26, the 30 count signal from the control signal generation circuit 25, and the output signal of the inverter 51. The "1 day" detection signals from 36 are combined.

This "1 day" detection signal is further coupled to the AND circuit 52 together with the signal A, and the output signal from the AND circuit 52 is supplied to the counting circuits 18a and 18b as a set signal to set the count value to "0". It will be done.

FIG. 5 shows an example of the display panel of the above-mentioned watch, which has two-digit numerical display sections 22a and 22b corresponding to "hour" and "minute", respectively, and eight display sections. Vessel 2
A region display section 27 consisting of 7a to 27h is provided.

Further, switches 81 to S are arranged, and switches S6 to S6 are disposed on the side. S7 is provided.

Here, when the switch S7 is operated, the numerical display section 22
a, 22b will display "January" and "date".

Also, a dot 22c separates the numerical display parts 22a and 22b.
, for example, "p/1" coupled to the "second" counting circuit 13.
If you make it blink with the sec signal, it will count and display the seconds.

That is, when the timepiece constructed as described above is used in Japan, for example, the count value of the counter 28 is set to "0", that is, Tokyo, by inputting the switch S6.

The counter circuit is time-synchronized to match the local time in Tokyo, and the display section 22 displays the time in Tokyo, and by operating the switch S7, the corresponding date is displayed.

Here, in the date counting section, as is clear from FIG. 4, the carry signal from the counting circuit 17 causes the counting circuit 18
is counted, and the counted value is made to correspond to the date, and the counted value of the "month" counting circuit 19 is used to determine whether the dog month or the small month is, and the switching advance date of the "month" is determined. This allows the date counting to proceed automatically.

Here, the time difference relationship between each city and region set in the clock is shown in FIG. 6.

In other words, assuming that "Tokyo" is "0", it will take 19 hours between "Honolulu" and "San Francisco" and "New York" for 19 hours across the international date line.
There are time differences of 7 and 14 hours, and furthermore, there are time differences of 1, 6, 8, and 9 hours between Tono, Northeast, Moscow, Rome, and London.

When "Tokyo" is, for example, 3 a.m. on the 13th, the time in each city is shown at the bottom of the diagram.

Therefore, the "hour" counting section is divided into two by counting circuits 16 and 17.
If we think of it as a quaternary system, if we add the number of pulses shown in the figure, that is, the complement of the 24-hour time difference, to the counting time of "Tokyo" as a step signal, the local time of the target city will be determined by "hour". It will be counted by the counting section.

That is, in the above clock device, when the clock part is set to "Tokyo" time, for example, "Honolulu" time is set.
When it is desired to know the time, the switch S6 is activated once, the counter 28 is incremented by one, and a count output of "1" is obtained.

When the counter 28 counts "1" in this manner, the display 27b of "Honolulu" is driven to be displayed in the region display section 27.

Furthermore, when this switch S6 is operated, the counter 28 has a count value of "0" and is specifying "Tokyo", so the gate of the AND circuit 33a is activated in response to the operation of the switch S6. The OR circuit 34 outputs five pulse signals, and the AND circuit 35 outputs a signal A.

Therefore, the "hour" counting circuit 16 is incremented by 5, and the time is corrected by 5 hours.

The signal A is also coupled to an AND circuit 49 in FIG.

At this time, if the count value of the "date" counting circuit 18, that is, the date is not "1st", the output of the inverter 51 is "1".
” Therefore, 30 counting signals are coupled to the “date” counting circuit 18 via the AND circuit 49.

In this case, the output of the impark 41 becomes "0" due to the generation of the signal A, so the gate of the AND circuit 39 is closed, and the "month" counting circuit 19 is closed regardless of the progress of the counting circuit 18.
is not advanced.

Then, the "date" counting circuit 18 is set to the date count value of one day earlier by the above-mentioned 30 signals.

In other words, as in the example in Figure 6, the time in "Tokyo" is "13".
If "Honolulu" is specified by the switch S6 in the case of "3:00 a.m. on the 12th", the complement 5 corresponding to the 19 hour time difference is counted and added, and the counting circuit section is set to count "8:00 a.m. on the 12th". Along with the regional city display of "Honolulu", the local time of Honolulu will be displayed on the display sections 22a, 22b and 27b.

Furthermore, "Tokyo" and "Honolulu" may have the same date, but in this case, the carry signal from the counting circuit 17 is output from the AND circuit 53 in response to the signal A accompanying the switch operation, and the flip-flop circuit 50 and supply one clock pulse Φe to the date counting circuit 18 via the AND circuit 48 and the OR circuit 47.

In other words, when adjusting the time difference at any location with Tokyo as a reference, the date counter circuit 18 is forced to a count value of -1 in consideration of the date change line, and whether it is the same day or the previous day is determined by the presence or absence of a carry signal after the counting operation. This is for making judgments regarding corrections.

If the switch S6 is further operated in this state, the counter 2
8 becomes the count value "2", and "San Francisco" is designated, and two signals are generated from the AND circuit 33b in accordance with the operation of the switch S6.

In this case, signal A is not generated).

Therefore, two more increment signals are supplied to the "hour" counting circuit 16 in addition to the addition count value + 5 for Honolulu, and as a result, the complement 7 corresponding to San Francisco is added, so that "10:00 a.m. on the 12th" is added. ” to be counted.

Thereafter, each time the switch S6 is operated, the displayed regional cities are sequentially specified in increments, and by taking out the number of pulses corresponding to the time difference of each part weight from the time difference control circuit 26, the local time of each city is "Date J" AM, This will be displayed together with PMJ.

Here, if the date count value of the "date" counting circuit 18 is "Tokyo" and "1st", for example, when "Honolulu" is specified, the last day of the previous month must be displayed as the date.

However, the last day of the month is the 31st, 30th, or
"28th" is different from "29th", and if such a distinction was made, the date counting control would be complicated.

Therefore, in this case, the date detection circuit 36
The date count of "1st" is detected, and when the date is "1st", the gate of the AND circuit 49 is closed, and the counting circuit 18a is passed through the AND circuit 52.

A set command of "0" is given to 18b.

That is, the date counting circuit 18 becomes a count value "0", and for example, the date of "Tokyo" becomes "March 1" as shown in A of FIG.
If the date is 'Honolulu', the date of 'Honolulu' is displayed as 'March 00th', as shown in B of the figure, to make it mean the last day of February.

Also, a special symbol display command is generated by the count value "O" of the date counting circuit 18, and "March E" is generated as shown in C in FIG.
” may be displayed.

In the above embodiment, the date control circuit 20 automatically sets the date for the 28th and 29th and the force setting for March even in February, depending on the normal year and leap year. The date and month of the month may be set, for example, by a calendar control method in which the "date" counting circuit 18 and the "month" counting circuit 19 are corrected and controlled in accordance with the operation of an external switch for time correction.

As described above, according to the present invention, when the date is incremented by one day due to time difference correction and the last day of the previous month is displayed, the last day of the previous month can be displayed without affecting the month counter. There is no need to determine what day it is, and the normal date display can be continued by simply controlling the increment of the date. It has a great effect on the realization of world clocks in wristwatches, etc.

[Brief explanation of the drawing]

FIG. 1 is a block diagram illustrating an example of a timepiece related to the present invention, FIG. 2 is a diagram showing a time difference control section of the timepiece, FIG. 3 is a diagram showing signals used in the time difference control section, and FIG. FIG. 4 is a block diagram illustrating a date control section according to an embodiment of the present invention, FIG. 5 is a diagram showing an example of a display panel section, and FIG. 6 is a diagram showing the relationship between cities and time differences set in the above clock. The figure shown in FIG. 7 is a diagram showing an example of the date display section when the time difference is corrected in the above embodiment. 11... Oscillation circuit, 12... Frequency dividing circuit, 13-19]... Counting circuit, 20... Tomorrow control circuit, 21... Display switching circuit, 22...
... Display section, 26 ... Time difference control circuit, 27
...Region display section, 28 ...Counter,
36...Date detection circuit.

Claims (1)

[Claims] 1. It has a time counting means, a date counting means, and a month counting means that are driven by a reference signal and electronically counts at least the time, date, and month, and these counting means are operated from the last day of the month to the first day of the next month according to a calendar. In a clock device controlled by a control means, a time correction means corrects the time to match the time in an area with a time difference, and when the time correction means causes the date to be the next day, the date counting means is added 1" and further When the month is the next month, the date counting means is set to 1" and the month counting means is incremented by +1"; when the date is yesterday by the time correction means, the date counting means is incremented by "-1"; 1. A date display device comprising: means for setting a date counting means to a code not included in the calendar when the date is last month, and display means for displaying according to the code.