JP2006029960A - Clocking device, portable electronic device, time information correction method, time information correction program, and computer-readable recording medium stored with the time information correction program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clocking device and the like, enabling automatically correction to a time based on a standard time in a using district area. <P>SOLUTION: A wrist watch 100 has a clocking means, a positional information generating means 111 for generating positional information, using a positional information satellite 10a or the like, a world standard time information generating means 122 for generating worldwide standard time information, based on a world standard time, using the positional information satellite 10a, a district standard time information generating means 123 for generating district standard time information, based on a local standard time, based on the positional information, the world standard time information and local standard time decision information, and a time information correction means 125 for correcting time information, based on the local standard time information. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a timing device, a portable electronic device, a time information correction method, a time information correction program, and a computer-readable recording medium on which a time information correction program is recorded.

Timekeeping devices incorporating an electronic timepiece such as a wristwatch, a mobile phone, a personal computer, and a PDA (Personal Digital Assistant) are widely used. Since the precision of the electronic timepieces built in these time measuring devices is not necessarily high, the user often needs to correct the electronic timepieces.
As a method for automatically correcting an electronic timepiece, a method using a time synchronization radio wave and a method using a time synchronization signal included in a television signal are known.
However, the method that uses radio waves for time synchronization is limited in areas where radio waves can be received, and the specifications of radio waves for time synchronization differ depending on the country / region, so the areas where this method can be used are limited. The method of receiving the time synchronization signal included in the television signal can be used only in a device having a television signal receiver.
For these reasons, the above two methods have not been widely used.

  As another method for automatically correcting the electronic timepiece, there is a method using GPS (Global Positioning System). Although the original purpose of GPS is positioning, the positioning signal transmitted by the GPS satellite includes time data, and since this time is extremely accurate, the time data is acquired to correct the time of the electronic clock. (For example, refer to Patent Document 1).

Japanese Patent Laid-Open No. 10-10251 (FIG. 2 etc.)

  In addition to the need for correction of the electronic clock due to errors in the electronic clock itself, the correction of the electronic clock may be necessary due to differences in standard time and differences in time systems such as daylight saving time. For example, when traveling across borders, it may be necessary to correct the electronic clock when entering a foreign country, which is the destination, which is cumbersome for the user of the timing device. It is also conceivable that the user of the timing device may not be aware that the electronic timepiece needs to be corrected. In such a case, the user will act based on the wrong time, and various inconveniences may occur.

  In the invention disclosed in Patent Document 1, information regarding the difference between the GPS time and the standard time of each region is stored in a storage device in the device in a fixed manner. When the place of use of the device changes due to moving or the like, it becomes necessary to manually correct the time.

  Therefore, in the present invention, even when the usage area of the timing device changes, the time information held by the timing means of the timing device, for example, an electronic timepiece, can be automatically corrected to the time based on the standard time of the usage area. It is an object of the present invention to provide a timing device, a time information correction method, a time information correction program, and a computer-readable recording medium recording the time information correction program.

  According to the first aspect of the present invention, there is provided, according to the first aspect, time measuring means for generating time information, and position information generating means for receiving position related signals transmitted by the position information satellite and generating position information indicating the coordinates of the reception point. A global standard time information generating means for receiving the position related signal and generating global standard time information which is a time based on the global standard time, and a geographical range in which the plurality of local standard times and the plurality of local standard times are used. The local standard time determination information that is information defining the local standard time determination information is searched based on the position information, the local standard time at the point indicated in the position information is selected, and the global standard time and the position information are selected. The time difference from the local standard time at the indicated point is calculated, and the local standard time information that is the time based on the local standard time at the point indicated in the position information is generated based on the time difference. A local standard time information generating means, a time information correcting means for correcting the time information of the time measuring means to the local standard time information, and the position information, the world standard time information, and the local standard time information. And a timing device having a storage means.

  According to the configuration of the first invention, the position information generating means, for example, a GPS positioning device, can generate position information, for example, latitude information and longitude information, which is the position of the time measuring device on the earth. In GPS, since four satellites orbit around six orbits, positioning can always be performed from any point on the earth including the polar regions. Therefore, the position information generating means can generate position information at any point on the earth.

The world standard time information generating means generates the world standard time information by acquiring and analyzing time information included in a position information signal transmitted from the position information satellite, for example, a GPS satellite. Here, the “world standard time” refers to a time based on a standard time common to the whole world regardless of the region such as UTC (Coordinated Universal Time).
In the position information signal transmitted from the GPS satellite, information indicating the total number of weeks since the operation start date of the GPS system (January 6, 1980), called the week number, and the Z count, Information indicating the total number of elapsed seconds (actually, one count corresponds to 6 seconds) from the start time (0:00:00 on Sunday) is included. For example, if the GPS positioning device acquires “1271” as the week number and “80000” as the Z count, the current time belongs to the week starting on May 16, 2004, and is 480000 (80000) from the beginning of the week. × 6) Seconds, that is, since 5 days and 13 hours 20 minutes 0 seconds have elapsed, time information that the current time is May 21, 2004 13:20 minutes 0 seconds can be generated.

  The above-mentioned times are all based on the GPS system's own standard time called GPS time, but are common to the whole world regardless of the region. GPS time is an example of the world standard time information. That is, the GPS positioning device is an example of the world standard time information generating means.

The local standard time information generating means generates local standard time information based on the position information, the world standard time information, and the local standard time determination information. Here, the local standard time is a time determined based on the standard time that is valid in a certain geographical range on the earth. For example, the time based on Japan Standard Time is an example.
The local standard time determination information is information that defines a geographical range that is valid for a certain standard time and a relationship between the standard time and the world standard time. The local standard time information generating means refers to the local standard time judgment information, selects the local standard time used at the current position of the time measuring device indicated in the position information, and the time difference between the standard time in the area and the world standard time To get. Then, the local standard time information indicating the local standard time at the current position of the time measuring device is generated by adding or subtracting the difference to the world standard time information.

  The time information correcting means acquires the local standard time information generated by the local standard time generating means, and corrects the time information generated by the time measuring means by updating with the local standard time information.

  Thus, according to the configuration of the present invention, the local standard time information can be generated based on the position information, the world standard time information, and the local standard time determination information, and the time information based on the local standard time information can be generated. Since the correcting means corrects the time information of the time measuring means, it is not necessary for the user to manually correct the time information of the time measuring apparatus even if the place of use of the time measuring apparatus changes.

  Preferably, according to the second invention, in the configuration of the first invention, the local standard time determination information includes information indicating boundaries of a plurality of time zones and a time difference between the local standard time and the global standard time in the plurality of time zones. Including time zone determination information including at least information indicating.

  The time zone refers to a geographical range on the earth that uses the same standard time, for example. Specifically, the region of Japan is included in a time zone that uses standard time (Japan Standard Time) that is 9 hours ahead of UTC. The time zone determination information includes information defining an extension of each time zone and information indicating a time difference between the standard time used in each time zone and the world standard time, for example, UTC.

According to the configuration of the second invention, the local standard time information generating means refers to the time zone determination information included in the local standard time determination information, and the time zone to which the current position of the time measuring device indicated by the position information belongs. And the difference (time difference) between the standard time and the world standard time in the time zone. Then, by adding (or subtracting) the acquired time difference to the world standard time information, local standard time information in the time zone to which the current position of the timing device belongs is generated.
For this reason, even if the place of use of the time measuring device changes, the time information of the time measuring means can be corrected to the time considering the time difference.

  Preferably, according to the third invention, in the configuration of the first invention, the local standard time determination information includes at least information indicating whether or not daylight saving time is adopted for each region and information indicating a period during which daylight saving time is applied. Including daylight saving time determination information.

Daylight saving time (Daylight Saving Time) is a system that advances the time by a predetermined time for a certain period of summer.
Daylight saving time information includes information that defines the extension of the region, information indicating whether or not daylight saving time is used in the region, daylight saving time application start time information, daylight saving time application end time information, and time advance amount information when daylight saving time is applied including.

According to the configuration of the third invention, the local standard time generating means refers to the daylight saving time determination information included in the local standard time determination information, and the daylight saving time is adopted at the current position of the time measuring device indicated by the position information. Determine whether or not. When daylight saving time is adopted, it is determined whether or not the current date and time is the date and time when daylight saving time is applied, and when it is applied, a time advance amount is obtained and the carry amount is obtained from the local standard time information. Subtract.
For this reason, even in an area where daylight saving time is adopted, the time information of the time measuring means can be corrected in consideration of daylight saving time.

  Preferably, according to the fourth invention, in the configuration according to any one of the first to third inventions, the communication means is provided, and the local area after the change is changed when the local standard time judgment information is changed. Local standard time for obtaining standard time determination information from a server outside the apparatus via the communication means, and updating the local standard time information stored in the storage device to the changed local standard time information obtained from the server It has a judgment information update means.

According to the configuration of the fourth invention, since the timing device has the communication means, the local standard time determination information can be acquired from the outside of the device, for example, a server connected to the Internet through the Internet or the like. The local standard time judgment information can change due to changes in social conditions, etc., but even when there is a change, the local standard time judgment information can always be kept up-to-date.
Therefore, the time information of the time measuring means can be corrected to the local standard time generated based on the latest local standard time determination information.

  Preferably, according to the fifth invention, in the configuration according to any one of the first to fourth inventions, the time display means for displaying the time, the local standard time at the point indicated by the position information, and the position information are displayed. Second local standard time information for calculating second local standard time information, which is a time based on the local standard time at the second point, based on a time difference from the local standard time at a second point different from the indicated point. It has a calculation means and a display time switching means for alternately switching the local standard time information and the second local standard time information and displaying them on the time display means.

According to the configuration of the fifth aspect of the invention, since the time measuring device has the display time switching means, the first local standard time information and the second local standard time information can be switched and displayed on the time display means.
For this reason, for example, when traveling, the local standard time in the original place of residence and the local standard time at the place of stay can be arbitrarily switched and displayed on the time display means.

  According to a sixth aspect of the present invention, there is provided the time information generating means for generating time information and position information generating means for receiving position related signals transmitted by the position information satellite and generating position information indicating the coordinates of the reception point. A global standard time information generating means for receiving the position related signal and generating global standard time information which is a time based on the global standard time, and a geographical range in which the plurality of local standard times and the plurality of local standard times are used. The local standard time determination information that is information defining the local standard time determination information is searched based on the position information, the local standard time at the point indicated in the position information is selected, and the global standard time and the position information are selected. The time difference from the local standard time at the indicated point is calculated, and the local standard time information that is the time based on the local standard time at the point indicated in the position information is generated based on the time difference. A local standard time information generating means, a time information correcting means for correcting the time information of the time measuring means to the local standard time information, and the position information, the world standard time information, and the local standard time information. This is achieved by a portable electronic device provided with a timing device having storage means.

  According to the configuration of the sixth invention, since the portable electronic device has the timing device of the first invention, even if the use place of the portable electronic device changes frequently, the electronic timepiece is used in the place of use. The time can be corrected based on the standard time.

  According to a seventh aspect of the present invention, there is provided a position information generating step in which the position information generating means of the timing device receives a position related signal transmitted by the position information satellite and generates position information indicating the coordinates of the reception point. The world standard time information generating means of the time measuring device receives the position related signal and generates the world standard time information which is the time based on the world standard time, and the local standard time information generation of the time measuring device. The means searches the local standard time judgment information based on the position information, selects a local standard time at the point indicated by the position information, and calculates a time difference between the global standard time and the local standard time at the point indicated by the position information. A local standard time information generation step for generating local standard time information that is a time based on the local standard time at the point indicated by the position information based on the time difference; It is achieved by the time information correction method characterized in that it comprises a time information adjustment step of the time information adjustment unit of the timekeeping device for correcting the time information of the clock means to said local standard time information.

According to the configuration of the seventh invention, similar to the configuration of the first invention, the time information can be corrected to the time according to the standard time of the current position of the time measuring device based on the local standard time determination information.
Therefore, it is not necessary for the user to manually correct the time information even if the place where the timing device is used changes.

  According to an eighth aspect of the present invention, there is provided, according to an eighth aspect, position information generating means for a time measuring device that receives position related signals transmitted from a position information satellite and generates position information indicating the coordinates of a reception point. A generating step, a global standard time information generating unit that receives the position-related signal by the global standard time information generating means of the timing device and generates global standard time information that is a time based on the global standard time, and a local standard of the timing device Time information generating means searches the local standard time determination information based on the position information, selects a local standard time at the point indicated in the position information, and the global standard time and the local standard time at the point indicated in the position information Local time is calculated based on the time difference and generates local standard time information that is the time based on the local standard time at the location indicated in the position information. An information generation step, time information adjustment means of the timing device is achieved by the time information adjustment program for executing a time information correction step of correcting the local standard time information the time information of the clock means.

According to the configuration of the eighth invention, similarly to the configuration of the first invention, the time information can be corrected to the time according to the standard time of the current position of the time measuring device based on the local standard time determination information.
Therefore, it is not necessary for the user to manually correct the time information even if the place where the timing device is used changes.

  According to a ninth aspect of the present invention, there is provided, according to the ninth aspect, position information generating means of the time measuring device that receives position related signals transmitted from the position information satellite and generates position information indicating the coordinates of the reception point. A generating step, a global standard time information generating unit that receives the position-related signal by the global standard time information generating means of the timing device and generates global standard time information that is a time based on the global standard time, and a local standard of the timing device Time information generating means searches the local standard time determination information based on the position information, selects a local standard time at the point indicated in the position information, and the global standard time and the local standard time at the point indicated in the position information Local time is calculated based on the time difference and generates local standard time information that is the time based on the local standard time at the location indicated in the position information. A computer-readable recording of a time information correction program for executing an information generation step and a time information correction step in which the time information correction means of the timing device corrects the time information of the time measurement means to the local standard time information This is achieved by a simple recording medium.

According to the configuration of the ninth invention, as in the configuration of the first invention, the time information can be corrected to the time according to the standard time of the current position of the time measuring device based on the local standard time determination information.
Therefore, it is not necessary for the user to manually correct the time information even if the place where the timing device is used changes.

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
The embodiments described below are preferred specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these embodiments.

FIG. 1 is a schematic view showing a wristwatch according to an embodiment of the timing device of the present invention. Reference numerals 10a, 10b, 10c, and 10d are GPS satellites that are examples of position information satellites, which constantly transmit position information signals 11a, 11b, 11c, and 11d, respectively.
A wristwatch 100 which is an example of a portable electronic device has a GPS receiver 101 for receiving a position information signal 11a and the like. By analyzing the position information signal 11a and the like received by the GPS receiver 101, it is possible to acquire GPS time information that is an example of the current position of the wristwatch 100 and the world standard time information.
In this embodiment, four GPS satellites 11a, 11b, 11c, and 11d are used to perform three-dimensional positioning to obtain coordinates (latitude, longitude, altitude) and GPS time, but are used for positioning. The number of satellites to be used is not limited to four, and two-dimensional positioning may be performed using three satellites. Moreover, it is good also as a structure which captures 5 or more satellites, selects the optimal 4 satellites out of them, and performs positioning.
The display device 102 displays the current time (year / month / day, hour / minute / second, day of the week) and operation mode with reference to an electronic timepiece (not shown) which is an example of a time measuring unit built in the wristwatch 100. For example, a liquid crystal display.
The operation device 103 is a device for a display device user to perform a display switching operation, and is configured by push buttons 103a and 103b in this embodiment.

(About the main hardware configuration of the watch)
FIG. 2 is a schematic diagram showing the main hardware configuration of the wristwatch 100 of FIG. As shown in FIG. 2, the wristwatch 100 has a computer. That is, the computer includes a bus 109, and a control device 106 such as a CPU (Central Processing Unit) is connected to the bus 109.
In addition, a storage device 105 including a RAM (Random Access Memory), a ROM (Read Only Memory), and the like is connected to the bus 109.
Further, the GPS receiver 101, the display device 102, the operation device 103, and the electronic timepiece device 104 shown in FIG.

  That is, the bus 109 has a function of connecting all devices and is an internal bus having an address and data bus. In addition to processing a predetermined program, the control device 106 controls the storage device 105 and the like connected to the bus 109. The storage device 105 stores various programs and various information.

(About main software configuration of watch 100)
FIG. 3 is a schematic diagram showing a main software configuration of the wristwatch 100 of FIG. As shown in FIG. 3, the wristwatch 100 has a control unit 110 for controlling the entire wristwatch 100.
The wristwatch 100 includes a GPS receiver 101a, a display unit 102a, an operation unit 103a, and an electronic timepiece unit 104a for managing the GPS reception device 101, the display device 102, the operation device 103, and the electronic timepiece device 104 of FIG. These are connected to the control unit 110.
For this reason, the GPS receiving unit 101a and the like are configured to be controlled by the control unit 110.

  As illustrated in FIG. 3, the wristwatch 100 includes a first storage unit 120, a second storage unit 130, and a third storage unit 140, and each is connected to the control unit 110. The first storage unit 120 stores various programs, and the second storage unit 130 stores information acquired by the positioning unit 111 and information calculated by the programs stored in the first storage unit. The third storage unit 140 stores information necessary for correcting the time when the wristwatch 100 is manufactured.

The wristwatch 100 has a positioning unit 111. The positioning unit 111 acquires (searches) the GPS satellites 10a to 10d in FIG. 1 through the GPS receiving unit 101a.
The positioning unit 111 decodes the position information signals 11a to 11d transmitted from the GPS satellites 10a to 10d, acquires navigation messages, performs positioning calculation from pseudo distances, etc., and calculates the latitude, longitude, and altitude positions of the observation points. Information is acquired and stored in the second storage unit 130 as position information 131.
That is, the positioning unit 111 obtains the position information 131 by obtaining the coordinates of the observation point and converting it to a coordinate system composed of latitude, longitude, and altitude. Therefore, the positioning unit 111 is an example of a position information generating unit that generates position information using the GPS satellite 10a or the like.
Further, the positioning unit 111 acquires the current time (GPS time) based on the GPS time from the week number and the Z count included in the navigation message, and stores the current time as GPS time information 132 in the second storage unit 130. The GPS time is a standard time used in GPS, and is based on an atomic clock mounted on the GPS satellite, and does not vary depending on the position of the GPS satellite or the reception point of the position information signal.
That is, GPS time is an example of world standard time, and GPS time, which is a time based on GPS time, is an example of world standard time. The positioning unit 111 is an example of a world standard time information generating unit that generates the world standard time information using the GPS satellite 10a or the like.

  The first storage unit 120 stores a UTC time information generation program 122, a time zone determination program 123, a daylight saving time determination program 124, and an electronic clock correction program 125.

The UTC time generation program 122 is a program that calculates an UTC time by adjusting an error between the GPS time and the UTC time (hereinafter referred to as a GPS / UTC error).
The GPS / UTC error is corrected with an astronomical time in UTC, so “leap seconds” are inserted with a frequency of about once every few years. Not. As of 2004, GPS is 13 seconds ahead of UTC. The number of seconds of this error is stored in the third storage unit 140 as GPS / UTC error information 143. The UTC time generation program 122 acquires the GPS / UTC error information 143 and subtracts it from the GPS time information 132 to generate UTC time information 133 and stores it in the second storage unit 130.

The time zone determination program 123 searches the time zone determination information 141 to determine which time zone the current position of the wristwatch 100 belongs to, and is based on the standard time used in the time zone to which the current position of the wristwatch 100 belongs. Calculate local standard time information.
As shown in FIG. 5, the time zone determination information 141 includes information on the latitude north end, the latitude south end, the longitude west end, and the longitude east end that are boundaries of each time zone. When the latitude of the current position of the wristwatch 100 is between the latitude north end and the latitude south end of a time zone, and the longitude of the watch 100 current position is between the latitude west end and the longitude east end, the time zone determination program 123 In addition, it is determined that the current position of the mobile phone 100 belongs to the time zone.
The time zone determination program 123 adds the time difference with UTC in the time zone to which the current location of the mobile phone 100 belongs to the UTC time information 133 to generate local standard time information 134. The time zone determination program 123 stores the generated local standard time information 134 in the second storage unit 130.
That is, the time zone determination program 123 is an example of local standard time information generation means, and the time zone determination information 141 is an example of local standard time determination information.

The daylight saving time determination program 124 determines whether or not daylight saving time is adopted in the region to which the current position of the wristwatch 100 belongs, and if it is adopted, determines whether or not the current date and time is the date and time when daylight saving time is applied. In this case, it is a program for correcting the local standard time information 134.
The daylight saving time determination program 124 first refers to the daylight saving time determination information 142 and determines the region to which the current position belongs in the same manner as the time zone determination program 123 described above. Next, whether or not daylight saving time is adopted in the area is determined by a flag included in the daylight saving time determination information. If daylight saving time is adopted in the area, whether or not the current time based on the local standard time indicated in the local standard time information is within the applicable daylight saving time period, and the current time is between the daylight saving time start date and time and daylight saving time end date and time. Judgment is made by whether or not there is. If the current time is within the daylight saving time application period, the daylight saving time correction amount is acquired from the daylight saving time determination information 142, added to the local standard time information, and the local standard time information is corrected to a time that takes into account daylight saving time. Stored in the local standard time information 134 of the storage unit 130.
When daylight saving time is not adopted in the area to which the current position belongs, the daylight saving time determination program 124 ends the execution without performing any special processing.

  An electronic clock correction program 125, which is an example of time information correction means, is a program that updates time information held by the electronic clock with local standard time information 134 stored in the second storage unit 130. The electronic clock correction program 125 acquires the local standard time information 134 stored in the second storage unit 130 and, for example, uses a time counter (an example of time information) stored in the RAM in the electronic clock device 104 as the local standard. The time information 134 is overwritten and updated.

Although the wristwatch 100 according to the present embodiment is configured as described above, an operation example thereof will be described below.
(About main operation examples of watch 100)
FIG. 4 is a schematic flowchart showing a main operation example of the wristwatch 100 according to the present embodiment.
The positioning unit 111 receives position information signals 11a to 11d transmitted from the four GPS satellites 10a to 10d, and acquires navigation data included in the signals. By analyzing the navigation data, the current position and GPS time of the wristwatch 100 are calculated and stored in the position information 131 and the GPS time information 132, respectively (ST41) (an example of the position information generation process and the world standard time information generation process). .

The UTC time generating program 122 acquires the GPS / UTC error information 143 and the GPS time information 132 stored in advance in the third storage unit 140, and calculates the UTC time information 133 (ST42). Since the GPS time is always ahead of the UTC time, for example, when the GPS / UTC error information 143 is 10 seconds, the UTC time can be calculated by subtracting 10 seconds from the GPS time. it can. The calculated UTC time information 133 is stored in the second storage unit 130.
Note that the GPS / UTC error information is also included in the navigation data, so it can be configured to be obtained and used. However, since the time required for positioning increases, as in this embodiment, It is preferable to store in advance in the timing device.

  The time zone determination program 123 searches the time zone determination information 141 stored in the third storage unit 140 based on the position information 131 stored in the second storage unit 130, and the watch 100 indicated by the position information 131. It is determined which time zone the region to which the current position belongs belongs (ST43).

The time zone determination information has a structure as shown in FIG. The first column of the table is the time zone number, the second column is the north latitude end, the third column is the latitude south end, the fourth column is the longitude west end, and the fifth column is the longitude east end. In these data, “+” indicates north latitude or east longitude, and “−” indicates south latitude or west longitude. The sixth column is the time difference between UTC and the standard time used in that time zone. If the value is positive, the standard time used in that time zone is more advanced than UTC. If it is, it indicates that the standard time used in the time zone is behind the UTC. The seventh column is a name of the time zone, for example, a character string “Japan”.
For example, if the current position shown in the position information 131 is 40 degrees 0 minutes 0 seconds north latitude and 140 degrees 0 minutes 0 seconds east longitude, the current position belongs to the second time zone and is used in that time. Determines that it is 9 hours ahead of UTC (ST43). Then, 9 hours is added to the UTC time information 133 calculated in step ST42, and the local standard time information 134 based on the standard time at the current position is calculated and stored in the second storage unit 130 (ST44) (local standard time information) Example of generation process).

  The daylight saving time determination program 124 searches for the daylight saving time determination information 142 based on the position information 131 stored in the second storage unit 130, and the daylight saving time is adopted in the region to which the current position of the wristwatch 100 indicated by the position information 131 belongs. It is determined whether or not (ST45).

The daylight saving time determination information has a structure as shown in FIG.
The first column is the region number, the second column is the northern latitude end, the third column is the southern latitude end, the fourth column is the western longitude end, and the fifth column is the east longitude end. The sixth column is a flag indicating whether or not daylight saving time is adopted in the area. In this example, “1” indicates that daylight saving time is adopted in the area, and “0” indicates that daylight saving time is not adopted in the area. The seventh column shows the daylight saving time start condition, which is “4, 1, SUN, 14:00”. This indicates that daylight saving time starts at “14:00” on “1st” and “Sunday” in the “4th” month. If daylight saving time is not adopted in the area, the data in the seventh column is empty (NULL). The eighth column is the daylight saving time end condition, and has the same data format as the daylight saving time start condition in the seventh column. The ninth column is the amount of time correction by daylight saving time. “10:00” in this example advances the 1 hour 0 minute clock when starting daylight saving time (for example, if daylight saving time starts at 14:00, the next 13:59 will be 15:00) Is shown. In areas where daylight saving time is not adopted, this field is set to “0”.
Note that the above example of daylight saving time judgment information has a structure that matches the daylight saving time system that is actually adopted in the United States and other countries as of 2004, but in the future, a different time correction system will be adopted. Even if it happens, it can be easily handled by changing the data structure.

  The time zone determination program 123 acquires the current date and time and compares it with the daylight saving time determination information 142. For example, if the current time is 10:10:10 on May 20, the daylight saving time start condition is “first Sunday of April (April 4) 14:00:00” and the daylight saving time end condition. Since it is included between “October 5th Sunday (October 31) 2:00:00”, it is determined that the current daylight saving time is applied (ST46). “1 hour” is obtained as the daylight saving time correction amount from the ninth column of the table, and this is added to the local standard time information 134 to calculate 11:10:10 on May 20, 2004. Is stored in the second storage unit 130 as local standard time information 134 (ST47).

The electronic clock correction program 125 acquires the local standard time information 134 stored in the second storage unit 130, and updates the time counter of the electronic clock by overwriting with the local standard time information 134 (ST48) (in the time information correction process). One case).
The display unit 102a in FIG. 3 displays the time held in the time counter of the electronic timepiece on the display device 102, so that the user of the wristwatch 100 can visually recognize the local standard time information that is the time considering the time zone and daylight saving time. (ST49).
The above-described series of processing is started with, for example, an operation instruction of the operation device 103 by the user of the wristwatch 100 as a trigger. Moreover, it can also be set as the structure performed every fixed time interval, for example, every 10 minutes, using a timer.

As described above, according to the present embodiment, the position information 131, the GPS time information 132 that is an example of world standard time information, the UTC time information 133, the time zone determination information 141 that is an example of local standard time information, and the daylight saving time determination. The local standard time information 134 is generated based on the information 142, and the electronic clock correction program 125 corrects the time information held by the electronic clock device 104 based on the generated local standard time information 134. Even if the place of use changes, the user does not need to manually correct the electronic timepiece device 104.
In particular, in a region where the clock needs to be corrected frequently because the standard time used differs depending on the state or the application of daylight saving time is different, such as in the United States, the effect of reducing the burden on the user of the watch 100 is great.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. Parts common to the first embodiment will be denoted by the same reference numerals in the drawing, description thereof will be omitted, and description will be made focusing on differences.
FIG. 7 is a schematic diagram showing a mobile phone 200 according to an embodiment of the timing device of the present invention.
In this embodiment, the mobile phone 200 connects to the base station 206, acquires the latest local standard time determination information from the server 400 via the mobile phone network 207, which is an example of the server 400, and stores the storage device of the mobile phone 200. The status standard time determination information stored in is updated. Therefore, the mobile phone 200 includes a communication device 208 for transmitting and receiving information to and from the server 400 via the base station 206 and the mobile phone network 207 in addition to the GPS receiver 201.
Since the cellular phone 200 also has a function of switching and displaying a plurality of local standard times as will be described later, a time display switching button 203a for the user to instruct the cellular phone 200 to switch the display, time, etc. Has a display device 202. The operation button 203b is a button for the user to give an instruction to acquire time zone determination information.
Server 400 transmits local standard time determination information to mobile phone 200 in response to a request from mobile phone 200.

(Main hardware configuration of mobile phone 200)
FIG. 8 is a schematic diagram showing a main hardware configuration of the mobile phone 200 of FIG. The watch is the same as the wristwatch 100 of the first embodiment except that the communication device 208 is added. The communication device 208 is a device for transmitting and receiving information via the server 400 such as the cellular phone network 207.

(Main software configuration of mobile phone 200)
FIG. 9 is a schematic diagram showing a main software configuration of the mobile phone 200 of FIG.
Since the mobile phone 200 includes the communication device 208, the mobile phone 200 includes a communication unit 208a correspondingly.
In addition to the configuration of the wristwatch 100 of the first embodiment, the first storage unit 220 stores a local standard time determination information acquisition program 126 and a time display switching program 127.

  In the third storage unit 240, time zone determination information 141, daylight saving time determination information 142, and GPS / UTC error information 143, which are examples of local standard time determination information, are stored in advance at the time of shipment. It is the same.

In the local standard time determination information acquisition program 126, the mobile phone 200 acquires local standard time determination information (specifically, time zone determination information 141 and daylight saving time determination information 142) and GPS / UTC error information 143 from the server 400. It is a program for updating to.
When the user of the cellular phone 200 operates the operation button 203b to start the local standard time determination information acquisition program 126, the local standard time information acquisition program 126 first sends the server 400 the time zone determination information 141, the daylight saving time determination information 142, An inquiry is made as to whether any of the GPS / UTC error information 143 has been updated. In response to the inquiry, the server 400 returns the presence / absence of updated information. If there is a response indicating that the updated information exists, the local standard time determination information acquisition program 126 downloads the updated information from the server and stores the time zone determination information stored in the third storage unit 140. 141, the daylight saving time judgment information 142, and the GPS / UTC error information 143 are updated by overwriting any or all of them.

The time display switching program 127 is a program for displaying on the display device 202 the time selected by the user from a plurality of local standard times.
Each time the user of the cellular phone 200 presses the display switching button 203a, the time display switching program 127 is activated. For example, the time based on the Japanese standard time and the time based on the US west coast standard time are alternately switched and displayed on the display device 202. That is, the time display switching program 127 is an example of a display time switching unit. FIG. 10 shows an example of a state in which time is displayed on the display device 202. The first line displays the current date, the second line displays the current time, and the third line displays information indicating which local time the current time is based on. Yes. Here, “US West Coast” indicates the name of the time zone and is included in the time zone determination information 141. “UTC-7” is information indicating that the standard time in this time zone is delayed by 7 hours with respect to UTC. “DST” indicates that it is currently within the daylight saving time application period.

  In order to realize the display switching function as described above, the mobile phone 200 has the current time difference information 135 and the display flag 136 in the second storage unit 230, and the reference location information 144 in the third storage unit 240, respectively. . The current time difference information 135 is a time difference between standard time and UTC in consideration of daylight saving time at the current position of the mobile phone 200. The display flag is information indicating whether the time displayed on the display device is based on the standard time of the current position or the standard time of the reference position. When the display flag 136 is on (true), Indicates that the time based on the standard time of the position is displayed. The reference position information is position information of a place where the mobile phone 200 is normally used. For example, when the mobile phone 200 is shipped to the Japanese market, the latitude and longitude of Tokyo, which is the capital of Japan. Is stored in the third storage unit 240 at the time of shipment.

(Main hardware configuration of server 400)
FIG. 11 is a schematic diagram showing a main hardware configuration of the server 400 of FIG. The server 400 has a computer. That is, the computer includes a bus 419, and a control device 416 such as a CPU is connected to the bus 419.
In addition, a storage device 415 including a RAM and a ROM, a display device 412, and an operation device 413 are also connected to the bus 419. In addition, a server communication device 414 for transmitting the latest local standard time determination information and the like through the network in response to a transmission request from the mobile phone 200 is also connected to the bus 419.

(Main software configuration of server 400)
FIG. 12 is a schematic diagram showing a main software configuration of the server 400 of FIG. As shown in FIG. 12, the server 400 has a control unit 420 for controlling the entire server 400.
The server 400 includes a display unit 412a, an operation unit 413a, and a communication unit 414a for managing the display device 412, the operation device 413, and the server communication device 414 in FIG. Has been.

As illustrated in FIG. 12, the server 400 includes a first storage unit 430 and a second storage unit 440, and each is connected to the control unit 420. Various programs are stored in the first storage unit 430, and information for transmission in response to a request from the mobile phone 200 is stored in the second storage unit 440.
The local standard time determination information transmission program 431 stored in the first storage unit 430 first responds to an inquiry from the mobile phone 200 with the latest time zone determination information 441, daylight saving time determination information 442, GPS / UTC error information. 443 is returned or not. Next, in response to a transmission request from the mobile phone 200, some or all of the time zone determination information 441, the daylight saving time determination information 442, and the GPS / UTC error information 443 stored in the second storage unit 240 are stored. Send to.

(About main operation examples of the mobile phone 200)
(Time correction operation)
FIG. 13 is a schematic flowchart showing an operation example of time correction of the mobile phone 200 in the present embodiment. The basic operation flow is the same as that of the wristwatch 100 of the first embodiment shown in FIG. 4, but steps ST50, ST51 and ST52 necessary for realizing the time display switching function are added. ing.

  In ST50, time difference information with UTC included in the time zone determination information acquired when the local standard time information is calculated in ST44 is stored in second storage section 230 as current local time difference information 135 (Δ1). Here, when the current time difference information 135 is a positive value, the standard time of the current position is advanced with respect to UTC. When the current time difference information 135 is a negative value, the standard time of the current position is delayed with respect to UTC. Means that

  In ST51, if daylight saving time is adopted in the area to which the current position belongs and the current date and time is within the daylight saving time application period, the current time difference information 135 is corrected. For example, when the amount of time increment by daylight saving time is 1 hour, the current local time difference information 135 is updated by adding 1 hour.

  In ST52, the display flag 136 is turned on and stored in the second storage unit 230. The display flag 136 being on means that the time currently displayed on the display device 202 is a time based on the standard time of the current position.

(Local standard time judgment information acquisition operation)
FIG. 14 is a schematic flowchart illustrating an operation in which the mobile phone 200 acquires the latest time zone determination information 141, daylight saving time determination information 142, and GPS / UTC error information 143 from the server 400.
First, the cellular phone 200 makes an inquiry to the server 400 of FIG. 7 as to whether or not there is the latest time zone determination information 141 or the like (ST61).
Server 400 transmits a response to mobile phone 200 regarding the presence of the latest information (ST62).
When the server 400 replies that there is the latest information, the cellular phone 200 requests the server 400 to transmit the latest information (ST63).
Mobile phone 200 receives the information transmitted from server 400, stores it in third storage section 140, and updates time zone determination information 141 and the like to the latest (ST64).

As described above, according to the present embodiment, since the mobile phone 200 includes the communication device 208, the time zone determination information 141, which is an example of the local standard time determination information, and the daylight saving time via the mobile phone network 207. The determination information 142 can be acquired from the external server 400. Therefore, even when there is a change in the time zone determination information 141 and the daylight saving time determination information 142, the time zone determination information 141 and the daylight saving time determination information 142 can always be updated to the latest information.
Therefore, the electronic timepiece device 104 can always be corrected to the latest local standard time information 134.

(Time display switching operation)
FIG. 15 is a schematic flowchart showing the operation of the mobile phone 200 when the time switching display button 204 is pressed.
In ST71, the time difference (Δ2) between standard time and UTC at the reference location is calculated in the same procedure as ST43 to ST51 in FIG. Specifically, the time display switching program 127 acquires the reference location position information 144 stored in the third storage unit 240, searches the time zone determination information 141, and to which time zone the current position belongs. And the time difference (Δ2) between the standard time and UTC in the time zone is acquired.

  In ST72, the daylight saving time determination information 142 is referred to and it is determined whether or not daylight saving time is adopted at the reference position. When daylight saving time is adopted, it is determined whether or not the current date and time is within the daylight saving time application period. If it is within the daylight saving time application period, Δ2 is corrected by adding the time advance amount due to daylight saving time to Δ2.

  In ST73, the difference (Δ3 = Δ1−Δ2) between the current time difference information 135 (Δ1) calculated in ST50 of FIG. 13 and the time difference (Δ2) in the reference location is calculated. This Δ3 indicates the time difference between the two points in consideration of the difference in time zone and the application of daylight saving time. When Δ3 is 0, there is no time difference between the current position and the reference position, so there is no need to switch display. Therefore, in this case, the time display switching program 127 ends the execution without performing the subsequent processing.

In ST75, since the processing contents differ depending on whether or not the time displayed on the display device 202 is the current position, it is determined whether or not the display flag 136 is on.
When the display flag 136 is on, that is, when the time displayed on the display device 202 is based on the standard time of the current position, it is stored in the counter by adding Δ3 to the counter of the electronic timepiece. The current time is corrected to the time of the reference position (ST76). When the display flag 136 is off, the time stored in the counter is corrected to the time of the reference position by subtracting Δ3 from the counter of the electronic timepiece (ST77).
As described above, since the time to be displayed is set in the counter of the electronic timepiece, the time display on the display device 202 is switched (ST78), and the display flag is inverted to prepare for the case where the time display switching button is pressed again. And stored in the second storage unit 130 (ST79).

The above-described operation will be described by taking as an example a case where an actual user of mobile phone 200 goes on a trip abroad.
Prior to departure, the user operates the operation unit of the mobile phone 200 to activate the local standard time determination information acquisition operation shown in FIG. 14 and acquires the latest time zone determination information and the like from the server 400. A user carries the mobile phone 200 and boards an airplane from within Japan. Since the time information correction operation shown in FIG. 13 is activated at intervals of 10 minutes by a timer, when the airplane enters the United States region, the display device 202 of the mobile phone 200 automatically performs the United States standard time. The time based on is displayed. The user who arrived at the destination needed to contact his family in Japan. At this time, the user operates the time switching button 203a to activate the time display switching operation shown in FIG. 15 to switch the time display to the time based on the standard time of Japan, which is the reference location, and the time in Japan is not midnight. Confirm that you can call your family.

Thus, according to the present embodiment, since the mobile phone 200 has the time display switching button 203a and the time display switching program 127, the time information to be displayed on the display device 202 is selected from a plurality of local standard time information. can do.
For this reason, for example, when traveling, the local standard time at the reference position and the local standard time at the place of stay can be arbitrarily switched and displayed on the display device 202.

(Third embodiment)
Next, a third embodiment of the present invention will be described. Description of parts common to the first embodiment will be omitted, and differences will be described.
FIG. 16 is a schematic diagram showing a digital still camera 300 according to an embodiment of the timing device of the present invention.
In this embodiment, first, a personal computer (hereinafter referred to as a PC) 350 connects to the server 500 through a network such as the Internet 360, and downloads the time zone determination information 141, the daylight saving time determination information 142, and the GPS / UTC error information 143 to download the PC 350. Is stored in a storage device (not shown) such as an HD (Hard Disk). The digital still camera 300 and the PC 350 have a common interface (not shown) such as a USB (Universal Serial Bus), and can communicate with each other through a connection cable 316.
As shown in FIG. 17, a device that is difficult to incorporate a connection interface, such as the wristwatch 100 of the first embodiment (see FIG. 1), is connected to the PC 350 via a cradle (connection table) 317. It can also be set as the structure to do.

  When configured to acquire time zone determination information and the like via the PC 350 as described above, the digital still camera 300 is equipped with a communication interface such as an Ethernet adapter and a communication protocol such as TCP / IP (Transmission Control Protocol / Internet Protocol). Even without this, the latest information such as the time zone determination information 141 can be acquired. That is, by giving most of the communication functions to the PC 350 or the cradle 317, time zone determination information and the like can be acquired from the server 500 without adding an extra configuration to the digital still camera 300.

(Main hardware configuration of the digital still camera 300)
FIG. 18 is a schematic diagram showing a main hardware configuration of the digital still camera 300 of FIG. The digital still camera 300 is the same as the other embodiments except that an external storage device 313, a connection device 308, and a photographing device 312 are added.
The digital still camera 300 includes a photographing device 312 for taking a photograph and acquiring image data, and an external storage device 313 made of, for example, a compact flash card for storing the photographed image. In the present embodiment, since the time information is used for recording as additional information in an image created by the photographing apparatus, the digital still camera 300 does not have a display device for displaying the time.

(About the main software configuration of the digital still camera 300)
FIG. 19 is a schematic diagram showing a main software configuration of the digital still camera 300 of FIG.
The image storage program 128 stored in the first storage unit 320 acquires time information corrected in consideration of the time zone and daylight saving time from the time counter of the electronic timepiece device, and externally stores the image data created by the photographing unit 312a. When storing in the storage device 313, for example, time information is added to the header portion of the image file.

(About main operation examples of digital still cameras)
FIG. 20 is a schematic flowchart showing an electronic clock correction operation of the digital still camera 300. Except that there is no step (ST49 in FIG. 4) for displaying the time on the display unit, it is the same as the case of the wristwatch 100 shown in FIG.

FIG. 21 is a schematic flowchart illustrating an operation when the shutter button 315 is pressed by the user of the digital still camera 300.
First, image data is acquired by the imaging device 312 (ST81).
Next, the image data is converted into a format suitable for storage, for example, a JPEG (Joint Photographic Coding Experts Group) format, and image data for storage is generated (ST82).
In ST83, the image storage program 328 adds time information acquired from the time counter of the electronic clock to the storage image data. In an image format such as JPEG, an area for recording the size of an image, called a header, is provided, and time information is recorded in this portion.
Then, the created image is stored in the external storage device 313 (ST84).

The procedure by which the PC 350 acquires time zone determination information and the like from the server 5000 is the same as that of the mobile phone 200 shown in FIG.
The procedure for the digital still camera 300 to acquire time zone determination information from the PC 350 is the same.

(About programs and computer-readable recording media)
A time information correction program for causing a computer to execute the position information generation process, the world standard time information generation process, the local standard time information generation process, and the time information correction process of the above-described operation example can be used.
Also, a computer-readable recording medium in which such a time information correction program is recorded can be used.

  A program storage medium used for installing the time information correction program and the like in a computer and making it executable by the computer is, for example, a floppy disk such as a floppy (registered trademark), a CD-ROM (Compact Disc Read Only Memory). ), CD-R (Compact Disc-Recordable), CD-RW (Compact Disc-Rewriteable), DVD (Digital Versatile Disc), and other semiconductor media in which programs are temporarily or permanently stored, It can be realized by a magnetic disk or a magneto-optical disk.

  The present invention is not limited to the embodiments described above. Furthermore, the above-described embodiments may be combined with each other.

It is the schematic which shows the wristwatch concerning embodiment of this invention. It is the schematic which shows the main hardware constitutions of the wristwatch of FIG. It is the schematic which shows the main software structures of the wristwatch of FIG. It is a schematic flowchart which shows the main operation examples of the wristwatch of this Embodiment. It is the schematic which shows the structure of the time zone judgment information which is an example of local standard time judgment information. It is the schematic which shows the structure of the daylight saving time judgment information which is an example of local standard time judgment information. It is the schematic which shows the mobile telephone concerning embodiment of this invention. It is the schematic which shows the main hardware constitutions of the wristwatch of FIG. It is the schematic which shows the main software structures of the wristwatch of FIG. It is the schematic which shows the time display screen of the wristwatch of FIG. It is the schematic which shows the main hardware constitutions of the server of FIG. It is the schematic which shows the main software structures of the server of FIG. It is a schematic flowchart which shows the main operation examples of the mobile telephone which is this embodiment. It is a schematic flowchart which shows the main operation examples of the mobile telephone which is this embodiment. It is a schematic flowchart which shows the main operation examples of the mobile telephone which is this embodiment. It is the schematic which shows the digital still camera concerning embodiment of this invention. It is the schematic which shows an example of the connection of the wristwatch concerning the embodiment of the present invention, and a personal computer. It is the schematic which shows the main hardware constitutions of the digital still camera of FIG. It is the schematic which shows the main software structures of the digital still camera of FIG. It is a schematic flowchart which shows the main operation examples of the digital still camera which is this embodiment. It is a schematic flowchart which shows the main operation examples of the digital still camera which is this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10a thru | or 10d ... GPS satellite, 100 ... wristwatch, 101 ... GPS receiving device, 101a ... receiving part, 102 ... display device, 102a ... display part, 103 ... operating device , 103a ... operation unit, 109 ... bus, 106 ... control device, 105 ... storage device, 110 ... control unit, 111 ... positioning unit, 120 ... first storage unit 122 ... UTC time generation program, 123 ... time zone determination program, 124 ... daylight saving time determination program, 125 ... electronic clock correction program, 130 ... second storage unit, 131 ... position Information, 132 ... GPS time information, 133 ... UTC time information, 140 ... third storage unit, 141 ... time zone judgment information, 142 ... daylight saving time judgment information, 143 ... PS / UTC error information, 200 ... mobile phone, 206 ... base station, 400 ... server, 208 ... communication device, 126 ... local standard time judgment information acquisition program, 127 ... time display Switching program, 135 ... current time difference information, 136 ... display flag, 144 ... reference position information, 300 ... digital still camera, 350 ... personal computer, 312 ... photographing device, 313 ... External storage device, 128 ... Image storage program.

Claims (9)

A time measuring means for generating time information;
Position information generating means for receiving a position related signal transmitted by the position information satellite and generating position information indicating coordinates of the reception point;
World standard time information generating means for receiving the position related signal and generating world standard time information which is a time based on the world standard time;
Local standard time determination information, which is information defining a plurality of local standard times and a geographical range in which the plurality of local standard times are used;
Search the local standard time judgment information based on the location information, select a local standard time at the point indicated by the location information, and calculate the time difference between the global standard time and the local standard time at the point indicated by the location information. A local standard time information generating means for generating local standard time information which is a time based on the local standard time at the point indicated by the position information based on the time difference;
Time information correcting means for correcting the time information of the time measuring means to the local standard time information;
A time measuring device comprising: storage means for storing the position information, the world standard time information, and the local standard time information.   The local standard time determination information includes time zone determination information including at least information indicating boundaries of a plurality of time zones and information indicating a time difference between the local standard time and the global standard time in the plurality of time zones. Item 2. The time measuring device according to item 1.   2. The timekeeping time according to claim 1, wherein the local standard time determination information includes daylight saving time determination information including at least information indicating whether or not daylight saving time is adopted for each region and information indicating a period during which daylight saving time is applied. apparatus. Having communication means;
When the local standard time determination information is changed, the local standard time determination information after the change is acquired from a server outside the apparatus via the communication unit, and the local standard time information stored in the storage device is The time measuring device according to any one of claims 1 to 3, further comprising: local standard time determination information updating means for updating to the changed local standard time information acquired from a server. Time display means for displaying the time;
The time based on the local standard time at the second point based on the time difference between the local standard time at the point indicated by the position information and the local standard time at a second point different from the point indicated by the position information. Second local standard time information calculating means for calculating second local standard time information;
The display time switching means for alternately switching between the local standard time information and the second local standard time information and displaying the information on the time display means. Timing device. A time measuring means for generating time information;
Position information generating means for receiving a position related signal transmitted by the position information satellite and generating position information indicating coordinates of the reception point;
World standard time information generating means for receiving the position related signal and generating world standard time information which is a time based on the world standard time;
Local standard time determination information, which is information defining a plurality of local standard times and a geographical range in which the plurality of local standard times are used;
Search the local standard time judgment information based on the location information, select a local standard time at the point indicated by the location information, and calculate the time difference between the global standard time and the local standard time at the point indicated by the location information. A local standard time information generating means for generating local standard time information which is a time based on the local standard time at the point indicated by the position information based on the time difference;
Time information correcting means for correcting the time information of the time measuring means to the local standard time information;
A portable electronic device comprising a timing device having storage means for storing the position information, the world standard time information, and the local standard time information. A position information generating step in which the position information generating means of the timing device receives a position related signal transmitted by the position information satellite and generates position information indicating the coordinates of the reception point;
A world standard time information generation step of generating a world standard time information which is a time based on the world standard time when the world standard time information generation means of the timing device receives the position related signal;
The local standard time information generating means of the timing device searches the local standard time determination information based on the position information, selects the local standard time at the point indicated by the position information, and is indicated by the world standard time and the position information. A local standard time information generating step for calculating a time difference from the local standard time at the point, and generating local standard time information that is a time based on the local standard time at the point indicated in the position information based on the time difference;
A time information correcting step in which the time information correcting means of the time measuring device corrects the time information of the time measuring means to the local standard time information;
A time information correction method comprising: On the computer,
A position information generating step in which the position information generating means of the timing device receives a position related signal transmitted by the position information satellite and generates position information indicating the coordinates of the reception point;
A world standard time information generation step of generating a world standard time information which is a time based on the world standard time when the world standard time information generation means of the timing device receives the position related signal;
The local standard time information generating means of the timing device searches the local standard time determination information based on the position information, selects the local standard time at the point indicated by the position information, and is indicated by the world standard time and the position information. A local standard time information generating step for calculating a time difference from the local standard time at the point, and generating local standard time information that is a time based on the local standard time at the point indicated in the position information based on the time difference;
A time information correcting step in which the time information correcting means of the time measuring device corrects the time information of the time measuring means to the local standard time information;
Time information correction program to execute. On the computer,
A position information generating step in which the position information generating means of the timing device receives a position related signal transmitted by the position information satellite and generates position information indicating the coordinates of the reception point;
A world standard time information generation step of generating a world standard time information which is a time based on the world standard time when the world standard time information generation means of the timing device receives the position related signal;
The local standard time information generating means of the timing device searches the local standard time determination information based on the position information, selects the local standard time at the point indicated by the position information, and is indicated by the world standard time and the position information. A local standard time information generating step for calculating a time difference from the local standard time at the point, and generating local standard time information that is a time based on the local standard time at the point indicated in the position information based on the time difference;
A time information correcting step in which the time information correcting means of the time measuring device corrects the time information of the time measuring means to the local standard time information;
The computer-readable recording medium which recorded the time information correction program for performing this.

Images