JP2014006174A - Calendar display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a calendar display device that can make possible easier acquisition of a more accurate Hejira calendar date at a geographical point desired by a user.SOLUTION: A calendar display device comprises time counting means that counts days by the Christian calendar, calendar converting means that uses a prescribed conversion table to convert a date by the Christian calendar into a date by the Hejira calendar, moon position calculating means that calculates the sunset time in a set position and the position of the moon at this sunset time, month beginning day determining means that determines the first day of a month by the Hejira calendar on the basis of the calculated moon position, date setting means that sets the day of an output object by the Hejira according to the date by the Hejira calendar converted by the calendar converting means and the result of determination by the month beginning day determining means, and displaying means that displays the date of this set output object.

Description

  The present invention relates to a calendar display device.

  Conventionally, there is a clock that can display the date (date) and day of the week. Various calendars using the solar calendar (Western calendar, Gregorian calendar) are widely used in many countries, and are easily calculated, acquired, and displayed together with time data in various clocks.

  On the other hand, the Hijra calendar, which is used mainly by the countries of the Arabian Peninsula and Muslims around the world, is a lunar calendar, with monthly changes set based on the envy of the moon. That is, in the Hijura calendar, when a new moon is observed after sunset (month age 0.0) at sunset, the next day is the first day of the next month. There are several official Hijra calendars that have been published and used by Saudi Arabia and other religious parties. Conventional electronic watches have 30 days (odd months) and 29 days (even months) every other month. And a calendar function for calculating and displaying a simple calendar with a predetermined 11 times in 30 years and 30 days in December (Patent Documents 1 and 2).

  Further, Patent Document 3 discloses a calendar display device that can convert and display a calendar for one year from the date data based on the Western calendar.

JP-A-60-133389 Japanese Patent Application Laid-Open No. 8-233594 JP-A-6-201861

  However, the sunset time is different in each part of the world, that is, the moon age at the sunset time is different in each part. Therefore, users who live in or move around the world cannot easily obtain accurate calendars at the user's location every month using the simple calendar. There was a problem that it was necessary to perform a correction operation.

  An object of the present invention is to provide a calendar display device that can easily acquire a more accurate date according to the Hijra calendar at a point desired by a user.

In order to achieve the above object, the present invention
A time counting means for counting dates according to the year,
Using a predetermined conversion table, a calendar conversion means for converting a date according to the Western calendar to a date according to the Hijra calendar;
A moon position calculating means for calculating the sunset time at the set position and the position of the moon at the sunset time;
Based on the position of the month calculated by the month position calculation means, a month initial determination means for determining the date of the month change according to the Hijra calendar at the set position;
A date setting means for setting a date to be output according to the Hijra calendar according to the date according to the Hijra calendar converted by the calendar conversion means and the determination result by the first month determination means;
A calendar display device comprising: display means for displaying an output target date set by the date setting means.

  According to the present invention, in the calendar display device, there is an effect that it is possible to more accurately and easily acquire the date according to the Hijra calendar at a point desired by the user.

It is a block diagram which shows the electronic timepiece of embodiment of this invention. It is a flowchart which shows the control procedure of the date change process of this embodiment. It is a flowchart which shows the control procedure of a hijura calendar output process. It is a flowchart which shows the control procedure of a hijura calendar output process. It is a graph which shows the corresponding | compatible pattern with a conversion Hijra day and an output setting date.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing an internal configuration of an electronic timepiece 1 which is an embodiment of a calendar display device of the present invention.

The electronic timepiece 1 is a timepiece that can be carried or carried, and is, for example, a wristwatch or a pocket watch. Alternatively, the electronic timepiece 1 may be a small and / or lightweight table clock.
The electronic timepiece 1 includes a CPU (Central Processing Unit) 11 (calendar conversion means, month position calculation means, month initial determination means, date setting means), ROM (Read Only Memory) 12, RAM (Random Access Memory) 13, An operation unit 14 (operation unit), an oscillation circuit 15, a frequency dividing circuit 16, a clock circuit 17 (time measurement unit), a power supply unit 18, a display unit 19 (display unit) and its driver 20, and a radio wave reception unit 21 and an antenna AN.

  The CPU 11 performs various processes for overall control of the entire operation and numerical calculation processes. The ROM 12 stores various programs that are called and executed by the CPU 11 and initial setting data used by these programs. The RAM 13 provides a working memory space to the CPU 11 and stores setting data by the user and various temporary data.

  The programs stored in the ROM 12 include a calendar conversion program 12a and a sunset / moon age calculation program 12c described later. The calculation method of sunset time and moon age is based on a well-known calculation method using latitude and longitude information, and at least the moon age based on an average moon envy cycle (29.53 days) can be calculated. . In addition, according to the accuracy required for the electronic timepiece 1, the method for calculating the age of the moon appropriately includes various parameters related to the orbital elements of the moon such as the eccentricity of the orbit of the orbit of the moon, and ± 0.3 days for each envy cycle More accurate approximation formulas and conversion tables corresponding to the degree of variation can be used. The setting data stored in the ROM 12 includes a city list 12b (setting position list storage) in which city names around the world are associated with geographical data including time difference information, latitude, and longitude in the city. Means).

  On the other hand, the setting data stored in the RAM 13 includes various data relating to the display of the Hijra calendar, that is, date data 13a (date storage means) described later, a month initial setting flag 13b, a correction presence flag 13c (deviation setting storage means), And a Jurassic calendar offset 13d.

  The radio wave receiving unit 21 receives and demodulates long wave radio waves (standard radio waves) for transmitting time information in various parts of the world via the antenna AN. The time correction based on the reception of the standard radio wave and the received data is performed by a CPU 11 at predetermined time intervals (for example, a predetermined time once a day). Further, the tuning frequency at which the standard radio signal is demodulated by the radio wave receiving unit 21 is appropriately switched under the control of the CPU 11.

  The operation unit 14 includes a push button and the like, receives an input operation from the outside, converts it into an electrical signal, and outputs it to the CPU 11. By the input operation to the operation unit 14, setting of a city selected from the city list 12b, setting of switching a calendar to be displayed between the Western calendar and the Hijra calendar, and the like are performed. In addition, when the first day of the month deviates from the calendar due to religious reasons, etc., it is possible to manually set and store the hijra calendar offset 13d indicating the deviation by operating the operation unit 14. .

  The oscillation circuit 15 generates a predetermined frequency signal and outputs it to the frequency divider circuit 16. The frequency dividing circuit 16 converts the frequency signal input from the oscillation circuit 15 into another frequency signal with a predetermined frequency dividing ratio or a frequency dividing ratio set by the CPU 11 and outputs the frequency signal to the time measuring circuit 17 and the CPU 11. To do.

  The timer circuit 17 counts a predetermined frequency signal input from the frequency divider circuit 16 and counts time and date. The date counted here is, for example, a date based on the Christian era, but may be the number of days with respect to an arbitrary reference point. This date data is received by the radio wave receiving unit 21 and is rewritten and modified under the control of the CPU 11 based on the decoded time data.

  The power supply unit 18 supplies power to each unit of the electronic timepiece 1 including the CPU 11. The power supply unit 18 is, for example, a combination of a solar cell and a secondary battery, and has a configuration capable of continuously operating each unit of the electronic timepiece 1 for a long period of time.

  The display unit 19 includes, for example, a liquid crystal display (LCD), and the driver 20 is a liquid crystal driver. Or the display part 19 is good also as providing the structure which concerns on another display, and the driver 20 according to a structure is provided. The display unit 19 digitally displays preset city time and date information. In the electronic timepiece 1 of the present embodiment, the time in the city selected and set from the city list 12b is counted by the time measuring circuit 17. The time data is read and displayed on the display unit 19. Alternatively, the clock circuit 17 may count the time of Coordinated Universal Time (UTC), and may display on the display unit 19 after adding / subtracting the time difference based on the time difference information of the city set by the CPU 11.

  Further, the display unit 19 can switch between the date display based on the Western calendar and the date display based on the Hijra calendar. When displaying the date according to the Hijra calendar, the date according to the Hijra calendar is converted from the date data according to the Western calendar held by the clock circuit 17 and displayed on the display unit 19.

Next, date output according to the embodiment of the present invention will be described.
FIG. 2 is a flowchart showing a control procedure by the CPU 11 of the date changing process executed in the electronic timepiece 1 of the present embodiment.

  In the electronic timepiece 1 of the present embodiment, the date change process is started once a day, for example, at the date change timing (0: 0) based on the date data counted by the time measuring circuit 17, and after the change. The date is calculated. In this process, first, the CPU 11 acquires date data from the timer circuit 17 (step S101). Next, the CPU 11 determines whether or not the output setting is a hydrangea calendar (step S102). If it is determined that the setting is not the output of the Hijra calendar, the CPU 11 outputs the acquired date of the Gregorian calendar (Western calendar) to the display unit 19 (step S111). Then, the CPU 11 ends the date change process.

  On the other hand, when it is determined that the output setting is the Hijra calendar, the CPU 11 calls the calendar conversion program 12a from the ROM 12 and converts the date of the Gregorian calendar to the date of the Hijra calendar (step S103).

  The CPU 11 further acquires latitude and longitude data of the set city from the city list 12b (step S104). The CPU 11 calls the sunset / moon age calculation program 12c, calculates the sunset time of the date calculation target date at the latitude and longitude, and calculates the moon age at the sunset time (step S105). Then, the CPU 11 executes a hijura calendar output process for acquiring and outputting an accurate date according to the hijra calendar based on these calculated values (step S106). When the CPU 11 outputs the date of the Hijra calendar, it ends the date change process.

  FIGS. 3 and 4 are flowcharts showing the control procedure by the CPU 11 of the Hidden calendar output process that is called and executed in the date change process.

  When the Hijra calendar output process is called, first, as shown in FIG. 3, the CPU 11 determines whether or not the day value (converted Hijra day) in the date of the Hijra calendar converted in the process of step S103 is 29th. Is determined (step S201). When it is determined that the converted hijra day is 29th, the CPU 11 next determines whether the age of the moon is within a predetermined range, for example, 1.1 or more and less than 5.0. (Step S202). When it is determined that the moon age is within this predetermined range, the CPU 11 sets the date of the Hijra calendar to the first day of the next month (step S203). Further, the CPU 11 sets the month initial setting flag to “ON” (step S204). Then, the process of the CPU 11 proceeds to step S301.

  If it is determined in the determination process in step S201 that the converted hijra date is not 29th, the CPU 11 then determines whether the converted hijra date is 30 days (step S211). If it is determined that it is the 30th, the CPU 11 determines whether or not the month initial setting flag is “ON” (step S212). When it is determined that the month initial setting flag is not “ON” (“OFF”), the processing of the CPU 11 proceeds to step S202, and after performing the same processing as in the case of the 29th, the CPU 11 Then, the process proceeds to either step S301 or step S311. On the other hand, if it is determined that the month initial setting flag is “ON”, the CPU 11 shifts the process to step S311.

  If it is determined in step S211 that the converted hidra date is not 30th, the CPU 11 further determines whether or not the converted hija date is 1 day (step S221). If it is determined that the converted hijra date is one day, the CPU 11 determines whether or not the month initial setting flag is “ON” (step S222). If it is determined that the month initial setting flag is “ON”, the processing of the CPU 11 proceeds to step S311 as it is. When it is determined that the month initial setting flag is not “ON” (“OFF”), the CPU 11 determines whether or not the age of the moon is less than a predetermined value, for example, less than 1.1 (step S223). ). If it is determined that the age of the moon is less than 1.1, the CPU 11 sets a date obtained by adding 1 to the value of the date of the currently set date of the hijra calendar (step S224). ). At this time, the value of the day to be added is added up to the 30th regardless of the month. Then, the process of the CPU 11 proceeds to step S301. If it is determined that the age of the moon is not less than 1.1, the CPU 11 sets the month initial setting flag to “ON” (step S225), and then sets the date in the calendar to the first day of the current month (step S225). S234). Then, the process of the CPU 11 proceeds to step S301.

  If it is determined in the determination process in step S221 that the converted hija date is not one day, the CPU 11 determines whether or not the converted hija date is two days (step S231). If it is determined that the converted hidra date is not two days, the processing of the CPU 11 proceeds to step S311 as it is. When it is determined that the converted hijra date is the second day, the CPU 11 determines whether or not the month initial setting flag is “ON” (step S232). If it is determined that the month initial setting flag is “ON”, the CPU 11 sets the month initial setting flag to “OFF” (step S233), and then shifts the processing to step S311. When it is determined that the month initial setting flag is not “ON” (“OFF”), the processing of the CPU 11 proceeds to step S234.

  When the process proceeds to step S301, as shown in FIG. 4, the CPU 11 determines whether or not the set date is equal to the converted hija date. If it is determined that they are equal, the CPU 11 sets the correction present flag to “OFF” (step S302). If it is determined that they are not equal, the CPU 11 sets the correction present flag to “ON”. (Step S303).

  After the correction presence flag is set in the process of step S302 or step S303, the CPU 11 sets the hydra calendar offset to “OFF”. That is, the amount of deviation from the set date is set to “0” (step S304). The CPU 11 outputs and displays the set date on the display unit 19 (step S305), ends the Hidden calendar output process, and returns to the date change process. At this time, the set date to be output is also stored in the RAM 13 as date data 13a.

  On the other hand, when the process proceeds to step S311, the CPU 11 determines whether or not the correction present flag is set to “ON”. When it is determined that the correction present flag is set to “ON”, the CPU 11 sets a date obtained by adding 1 to the value of the date of the currently set date of the hijra calendar. Setting is performed (step S312). Subsequently, the CPU 11 determines whether or not the Hidden calendar offset is “OFF” (step S314). If it is determined that the Hidden calendar offset is “OFF”, the CPU 11 shifts the processing to step S305 as it is. If it is determined that the Hidden calendar offset is not “OFF”, the CPU 11 moves the set date back and forth by the number of days indicated by the set offset value (step S315), and then the moved setting. The date is output and displayed on the display unit 19 (step S305). Then, the CPU 11 finishes the Hijra calendar output process and returns to the date change process.

  When it is determined that the correction present flag is not set to “ON” (set to “OFF”) (“NO” in step S311), the CPU 11 keeps the acquired conversion hidra date as it is. A setting date is set (step S313). Subsequently, the CPU 11 determines whether or not the Hidden calendar offset is “OFF” (step S314). If it is determined that the Hidden calendar offset is “OFF”, the CPU 11 shifts the processing to step S305 as it is. If it is determined that the Hidden calendar offset is not “OFF”, the CPU 11 moves the set date back and forth by the number of days indicated by the set offset value (step S315), and then the moved setting. The date is output and displayed on the display unit 19 (step S305). Then, the CPU 11 finishes the Hijra calendar output process and returns to the date change process.

  FIG. 5 is a chart showing the correspondence patterns before and after the monthly change between the converted Hijra date calculated by the electronic timepiece 1 of this embodiment and the set date output in the Hijra calendar output process.

  FIGS. 5A1 to 5A5 show correspondence patterns from the end of the current month to the beginning of the following month in a month (small month) having 29 days including the date according to the Hijra calendar converted in step S103.

  As shown in FIG. 5 (a1), when the converted hijra date and the set date are the same in both the current month and the next month, first, when the converted hijra date is 28th, steps S201, S211, S221 and S231 are performed. In the date discriminating process, all branches to “NO”, and the correction flag is “OFF” (“NO” in step S311), so that the converted Hidara date is set as the set date as it is (Step S313). When the calendar offset is “OFF” (“YES” in step S314), the set date is output as it is (step S305). Next, if the converted hijra date is 29, the process of branching to “YES” in the date determination process in step S201 has not yet passed 1.1 days, and the determination process in step S202. Branches to “NO”. Thereafter, after the processing of step S311, similarly, the converted hijura date is output as it is as the set date (steps S313 and S305).

  If the converted hijra date is one day, “NO” is determined in the date determination process in steps S201 and S211, and “YES” is branched in the determination process in step S221. Since the flag is “OFF”, the process branches to “NO”, and the process proceeds to step S223. At this time, the age of the moon becomes 1.1 or more, the flow branches to “NO”, the month initial setting flag is set to “ON” (step S225), and the set date is 1 in the same month as the converted Hijra date. A day is determined (step S234). As a result, since the set date and the converted hijra date become equal, the correction presence flag is set to “OFF” (steps S301 and S302). In addition, the Hidden calendar offset is set to “OFF” (step S304), and the set date is output (step S305).

  Further, if the converted hijra date is 2, the process branches to “NO” in the date determination process in steps S201, S211, and S221, and then branches to “YES” in the determination process in step S231. Since the month initial setting flag is already “ON” on the 1st, the process branches to “YES” in the determination process of step S232 and proceeds to the process of step S233, and the month initial setting flag that has been set to “ON”. Is set to “OFF”. Thereafter, similarly to the case where the converted hijra dates are the 28th and 29th, since the correction flag is “OFF” (“NO” in step S311), the converted hijra date is set as the set date as it is (step S313). The calendar offset is “OFF” (“YES” in step S314) and is output (step S305).

Next, as shown in FIG. 5 (a2), when it is determined that the number of days in a small month is longer by one day, the processing of (a1) changes in the processing after the conversion Hijra day.
If the converted hijra date is one day, it is determined in step S223 that the age is still less than 1.1. Therefore, the CPU 11 adds 1 to the 29th setting day of the previous day as the setting date of this day, and sets the 30th day of the previous month as the setting date (step S224). As a result, the set date is different from the conversion date, so the set date is output (step S305) after the correction flag is set to “ON” (steps S301 and S303).

In addition, when the conversion Hidden date is 2, since the month initial setting flag is still “OFF” (“NO” in Step S232), the CPU 11 sets this date as the first day of the current month (Step S234). Then, the correction presence flag is set to “ON” again (steps S301 and S303), and the set date is output (step S305).
If the converted hijra date is after the third day, the correction present flag is determined to be “ON” in the determination processing in step S311, and the set date is the date obtained by adding one day to the previous day (step S312).

  As shown in FIG. 5 (a3), when the set date moves from the current month to the next month with a one-day delay from the conversion hijra date, the correction present flag remains “ON” before the month change.

That is, if the converted hijra date is 28th or 29th, the determination process in step S311 branches to “YES”, and the 27th and 28th are set based on the previous set date (step S312). ).
Further, when the converted hijra day is one day, in the process according to the flow similar to the process of FIG. 5A2, the 29th day of the previous month is changed based on the set day (28th day) of the previous day in the process of step S312. Set date. The process in the case where the converted hijra day is 2 days is the same as the process in the case where the converted hijra day is 2 days shown in FIG.

  Contrary to FIG. 5 (a3), as shown in FIG. 5 (a4), when the set date moves from the current month to the next month while proceeding by one day from the conversion hijra date, the correction flag is “ON”. Will remain. Therefore, in this case, when the conversion Hijra day is 28, the process branches to “YES” in the process of Step S311 and the next day of the previous day, that is, the 29th day is set as the set date (Step S312).

  If the converted hijra day is 29, the age of the moon becomes 1.1 or more in the discrimination process in step S202 and the process branches to “YES” and is set to the first day of the next month (step S203). The setting flag is set to “ON” (step S204). As a result, the set date and the converted hijura date are different, so that the correction presence flag is set to “ON” again (steps S301 and S303). Then, the set date is output (step S305).

  When the conversion hijra date is 1st or 2nd, since the month initial setting flag is already set to “ON”, the process branches to “YES” in steps S222 and S232, respectively. Proceed to the process, and by adding one day each to the set date of the previous day based on the correction flag (“ON”), the second day and the third day are set as the set days (steps S311 and S312), respectively. (Step S305).

  Further, as shown in FIG. 5 (a5), by setting a month that is one day longer than the converted Hijra date, the date that has been advanced one day from the date according to the converted Hijra calendar is converted together with the monthly change. May be equal to calendar date. In this case, the processing flow when the converted hijra date is 28th and 29th is the same as that shown in FIG. 5 (a3) except that the 29th and 30th are set and output, respectively. Further, the process when the converted hijra date is after the first day is the same as in FIG. When the month is changed, the correction flag is changed to “OFF” in the processing of steps S301 and S302.

  On the other hand, FIGS. 5B1 to 5B5 show correspondence patterns from the end of the month (large month) in which one month according to the converted Hijra calendar has 30 days to the beginning of the next month.

  As shown in FIG. 5 (b1), when the conversion Hijra date matches the set date in both the previous month and the next month, the processing when the conversion Hijra date is 30 days is added, This is the same as the Hijra calendar output process performed when the small month changes as shown in FIG. In other words, if the conversion hijra date is 30 days, the process branches to “YES” in the determination process of step S211, and since the month initial setting flag is “OFF”, the process branches to “NO” in the process of step S212. Thereafter, the process branches to “NO” in the determination process of step S202, and the process proceeds to the process of step S311.

  As shown in FIG. 5 (b2), when the number of days in the current month is reduced by one day and each day of the following month is advanced by one day, the flow of the Hijra calendar output process when the converted Hijra days are 28th and 29th is shown in FIG. It is the same as the normal one shown in (a1).

  If the converted hijra date is 30th, the month initial setting flag is “OFF”, so when the process proceeds to the determination process in step S202, it is determined that the age of the moon is 1.1 or more. As a result, the set date becomes the first day of the next month (step S203), the month initial setting flag is set to “ON” (step S204), and the correction presence flag is set to “ON” (steps S301 and S303). ). The process in the case where the conversion date is after the first day is the same as that shown in FIG.

  The pattern shown in FIG. 5 (b3) is a case where the state where the set date is one day later than the converted hijura date is continued in the current month and the next month, as in the pattern shown in FIG. 5 (a3). Therefore, the contents of the hijura calendar output process in the pattern shown in FIG. 5 (b3) are the same as those shown in FIG. 5 (a3) except that the process when the converted hijra date is 30th is added. . In other words, if the converted hijra date is 30 days, the process branches to “YES” in the date determination process in step S211, the month initial setting flag is “OFF” (“NO” in step S212), and the age of the moon is within a predetermined range. Outside (“NO” in step S202), the correction flag is “ON” (“YES” in step S311), and 29th is set by adding one day to the current set date (28th) (step S312) is output (step S305).

  Further, the pattern shown in FIG. 5 (b4) is a case where a state in which the set date is one day ahead of the converted hijra date is continued in the current month and the next month. Regarding the contents of the process in this case, the Hijra calendar output process executed when the converted Hijra date is 28th and 29th is the same as the process shown in FIG. The Hijra calendar output process executed on the 1st is the same as the content of the process shown in FIG. 5 (b2).

  As shown in FIG. 5 (b5), the date of the set date, which is one day behind the converted hijura date, is changed monthly because the number of days in one month is shorter than the number of days in one month in the converted Hijra calendar. Along with that, it may coincide with the conversion Hijra date. In this case, the Hijra calendar output process executed when the converted Hijra dates are the 29th and the 30th is the same as the Hijra calendar output process shown in FIG. 5 (b3). The Hijra calendar output process executed in the case of two days is the same as the Hijra calendar output process shown in FIG.

  As described above, the electronic timepiece 1 according to the present embodiment includes the calendar conversion program 12a for converting from the Western calendar to the Hijra calendar, the sunset time based on the latitude and longitude information at the set position, and the moon age at the sunset time. Is stored in the ROM 12, and the CPU 11 determines the beginning of the month in the Hijra calendar according to the age information at the sunset time at the set position, and according to the identified beginning of the month. Correct the date of the converted Hijra calendar. Therefore, it is possible to know the date of the Hijra calendar based on the envy of the moon accurately and easily in various parts of the world.

  In addition, depending on the accuracy required for the electronic timepiece 1, there is a difference between the moon's revolution period and the earth's rotation period, and the difference in the timing of the hail caused by the correspondence between the moon's eccentricity and the earth's revolution orbit. Thus, it is possible to calculate and display a calendar according to an accurate monthly change.

  In addition, by storing the date of the previous day as date data 13a, it is possible to easily update the date by adding 1 to the stored day value other than the first day of the determined month. It can be performed.

  In addition, the process for determining whether or not the timing is at the beginning of the month is performed only from the 29th to the 2nd, and during other periods, the day is simply added to the previous day. Therefore, it is possible to perform processing with a reduced load without unnecessarily increasing the amount of calculation until a date that cannot be achieved.

  In addition, by storing whether or not there is a deviation in the converted date data as the corrected flag 13c, if there is no correction correction, the converted date can be output as it is. Becomes simpler.

  In addition, the city list 12b is stored in the ROM 12, and a preset city name and latitude / longitude information of the city are stored in association with each other, so that the user does not need to directly check and input the value of latitude / longitude. By selecting an appropriate city, accurate date information based on the Hijra calendar can be obtained easily.

  Moreover, since the sunset time and the moon age on the date after the change are calculated at the timing of the date change, there is no need to return to the previous day's data and perform the calculation process, and the process can be simplified.

The present invention is not limited to the above-described embodiment, and various modifications can be made.
For example, in the above embodiment, the monthly change is calculated based on the relationship between the sunset time of the day on which the date is set according to the Hijra calendar and the age at the sunset time, but the monthly change is the age at sunset of the previous day. Since it is determined, the monthly change can be identified more accurately by calculating the sunset time of the previous day and the age at this timing. In this case, the judgment of the condition is made based on whether the age of the moon is a value near 0 or a value near 29, based on the time point of the cocoon. There is no need to consider. In this case, the difference between the coordinates of the moon and the sun (eg, longitude) at sunset may be considered as a value equivalent to the age of the moon.

  Further, in the above embodiment, the condition of monthly change is that the age of the date calculation target day is 1.1 or more. However, the age of 0.1 corresponds to about 2.5 hours and may be large depending on the situation. Since it may be too much, the value may be smaller than 1.1. For example, since the change in sunset time in two consecutive days is about 5 minutes at maximum (approximately 0.0035 in age) excluding the polar region, latitude / longitude information, formula for calculating sunset time, and moon age Depending on the accuracy of the calculation formula, it can be set to an appropriate value above this age. Alternatively, as long as an error in the direction in which the month changes before the date (the direction in which the date advances) may be included, the reference age may be simply set to 1.0. In addition, depending on the direction in which the error is allowed, only a part of the Hijra calendar output process shown in the above embodiment may be processed.

  Further, in the above embodiment, only the deviation of one day is considered between the converted hijura date and the set date, but the relationship between the eccentricity of the moon's revolution orbit and the earth's revolution orbit, If there is a difference of two days or more due to the time difference between the year and December of the leap year, etc., the operation for each date in the output process of the hijura calendar is expanded to 28 days and 3 days. On the 3rd and 3rd, the same processing as the 29th and 2nd in the above embodiment is performed, and on the 29th and 2nd, the same processing as the 30th and 1st in the above embodiment is performed. Thus, it is possible to appropriately identify the monthly change according to the Hijra calendar.

  Further, in the Hijra calendar output process of the above embodiment, it is assumed that the date of the previous day according to the Hijra calendar is held as the date data 13a. However, if the date data 13a is not held, the previous date It is possible to obtain a date according to the Hijra calendar by calculating the timing of 朔 and adding the number of days from the next day.

  In the above embodiment, the date data 13a is stored, and one day is added to be used for setting the date of the next day. However, not the date itself but the number of shift days between the converted hijdah date and the set date is stored. In addition, it may be used for setting the date of the next day by adding to the conversion Hijra day.

  Further, in the above embodiment, the latitude / longitude data is acquired in the process of step S104, and the sunset time and the moon age are calculated in the process of step S105, and then the hydrangea calendar output process is performed in step S106. In the calendar output process, the latitude / longitude data and the moon age time are not used on days other than the 1, 2, 29, and 30th converted hijra days, so steps S104 and S105 are performed according to the converted hijra date by the process of step S103. This processing may be omitted.

  In the above embodiment, by selecting from the cities set in the city list in advance, various calculations are performed based on the representative latitude and longitude values of the city. By making it possible to set the value, it is possible to more accurately identify the monthly change timing at a desired point. Furthermore, by including altitude (elevation) information, the identification accuracy of monthly changes at high altitudes can be further enhanced.

In the above-described embodiment, the electronic timepiece 1 has been described as an example. However, the electronic timepiece is not limited to the electronic timepiece as long as it is an electronic device capable of displaying the Hijra calendar. A dedicated date display device or a notification device combined with a worship time notification function may be used.
In addition, details such as the specific configuration, numerical values, and control order shown in the above embodiment can be changed as appropriate without departing from the spirit of the present invention.

Although several embodiments of the present invention have been described, the scope of the present invention is not limited to the above-described embodiments, but includes the scope of the invention described in the claims and equivalents thereof.
The invention described in the scope of claims attached to the application of this application will be added below. The item numbers of the claims described in the appendix are as set forth in the claims attached to the application of this application.

[Appendix]
<Claim 1>
A time counting means for counting dates according to the year,
Using a predetermined conversion table, a calendar conversion means for converting a date according to the Western calendar to a date according to the Hijra calendar;
A moon position calculating means for calculating the sunset time at the set position and the position of the moon at the sunset time;
Based on the position of the month calculated by the month position calculation means, a month initial determination means for determining the date of the month change according to the Hijra calendar at the set position;
A date setting means for setting a date to be output according to the Hijra calendar according to the date according to the Hijra calendar converted by the calendar conversion means and the determination result by the first month determination means;
A calendar display device comprising: display means for displaying an output target date set by the date setting means.
<Claim 2>
Date storage means for storing a date according to the Hijra calendar set by the date setting means;
When the date setting means determines that the next day is not the first day of the month when the output target date is updated and set to the next day's date, the date is stored in the date storage means. The calendar display device according to claim 1, wherein a date obtained by adding 1 to a day value of the date is set.
<Claim 3>
A deviation setting storage means for storing whether or not there is a deviation between the date converted by the calendar conversion means and the date set by the date setting means;
The date setting unit determines that the next day is not the first day of the month by the first month determination unit when the output target date is updated to the next day, and the deviation setting storage unit sets the date to the previous day. The calendar display device according to claim 1 or 2, wherein if it is stored that there is no deviation, the date converted by the calendar conversion means is set as it is.
<Claim 4>
A plurality of setting position list storage means in which a plurality of candidate locations of setting positions and latitude and longitude data of the candidate locations are stored in association with each other;
An operation means for receiving an input operation from the outside,
The month position calculating means calculates a sunset time at a set position selected from the candidate sites stored in the set position list storage means by the operating means and a moon position at the sunset time. The calendar display device according to any one of claims 1 to 3.
<Claim 5>
The calendar display according to any one of claims 1 to 4, wherein the month position calculating means calculates a sunset time on a date to be output and a position of the moon at the sunset time. apparatus.

1 Electronic clock 11 CPU
12 ROM
12a Calendar conversion program 12b City list 12c Sunset / age calculation program 13 RAM
13a Date data 13b Monthly initial setting flag 13c Corrected flag 13d Hidden calendar offset 14 Operation unit 15 Oscillation circuit 16 Dividing circuit 17 Clock circuit 18 Power supply unit 19 Display unit 20 Driver 21 Radio wave receiving unit AN Antenna

Claims (5)

A time counting means for counting dates according to the year,
Using a predetermined conversion table, a calendar conversion means for converting a date according to the Western calendar to a date according to the Hijra calendar;
A moon position calculating means for calculating the sunset time at the set position and the position of the moon at the sunset time;
Based on the position of the month calculated by the month position calculation means, a month initial determination means for determining the date of the month change according to the Hijra calendar at the set position;
A date setting means for setting a date to be output according to the Hijra calendar according to the date according to the Hijra calendar converted by the calendar conversion means and the determination result by the first month determination means;
A calendar display device comprising: display means for displaying an output target date set by the date setting means. Date storage means for storing a date according to the Hijra calendar set by the date setting means;
When the date setting means determines that the next day is not the first day of the month when the output target date is updated and set to the next day's date, the date is stored in the date storage means. The calendar display device according to claim 1, wherein a date obtained by adding 1 to a day value of the date is set. A deviation setting storage means for storing whether or not there is a deviation between the date converted by the calendar conversion means and the date set by the date setting means;
The date setting unit determines that the next day is not the first day of the month by the first month determination unit when the output target date is updated to the next day, and the deviation setting storage unit sets the date to the previous day. The calendar display device according to claim 1 or 2, wherein if it is stored that there is no deviation, the date converted by the calendar conversion means is set as it is. A plurality of setting position list storage means in which a plurality of candidate locations of setting positions and latitude and longitude data of the candidate locations are stored in association with each other;
An operation means for receiving an input operation from the outside,
The month position calculating means calculates a sunset time at a set position selected from the candidate sites stored in the set position list storage means by the operating means and a moon position at the sunset time. The calendar display device according to any one of claims 1 to 3.   The calendar display according to any one of claims 1 to 4, wherein the month position calculating means calculates a sunset time on a date to be output and a position of the moon at the sunset time. apparatus.

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