JP2003114290A - Local time calculating method and clock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically calculates and displays the local time of a destination during an overseas trip or the like. SOLUTION: Position information from a GPS device 7 is acquired and retained at a position information acquiring part 2A. Time information (UTC) from the GPS device 7 is set in built-in clock 1 as well. A position-corresponding time difference storage part 3A stores time differences corresponding to respective positions. A summertime time storage part 4 stores advance time of the summertime corresponding to the position and data. A calculating part 5A acquires position information from a position information acquiring part 2, the time information (UTC) from the internal clock 1, a time difference information corresponding to the position information from the position corresponding time difference storing part 3A, and the advance time of the summertime corresponding to the position information and the data from the summertime time storing part 4. The local time is calculated from UTC, the time difference, and the advance time in the summertime, and is displayed on a display part 6.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a timepiece.

[0002]

2. Description of the Related Art Conventionally, it has been necessary to manually adjust the time difference of a timepiece when there is a time difference in the destination area during overseas travel. Also, if there is daylight saving time in the area, it is necessary for the user to determine the day when daylight saving time should be implemented and set the time manually. Also, G
There is one that acquires the Coordinated Universal Time (UTC) by PS and automatically sets the time, but it was necessary to manually set the time difference information of the area.

[0003]

The conventional timepiece described above has the following problems. 1) The time difference cannot be calculated automatically. 2) Daylight saving time cannot be calculated automatically. 3) The time cannot be set automatically.

An object of the present invention is to provide a local time calculating method and a clock for automatically calculating and displaying the local time at the current position.

[0005]

[Means for Solving the Problem] The time difference between the local time at each position and the Coordinated Universal Time is stored in advance. Then, the position information of the current position and the Coordinated Universal Time are acquired from the GPS, the mobile phone or the like. The time difference of the current position is obtained from the position information, and the local time is calculated from the Coordinated Universal Time and the time difference.

If a daylight saving time advance clock corresponding to each position and date is stored in advance, the local time when the summer time is set can be calculated.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a timepiece according to a first embodiment of the present invention.

In this embodiment, a GPS (Global Positioning System) device is used to acquire position information and time information, and the local time of the place where the clock exists is calculated and displayed.

The timepiece of this embodiment comprises a built-in timepiece 1, a position information acquisition section 2A, a position corresponding time difference storage section 3A, a summer time time storage section 4, a calculation section 5A and a display section 6.

The position information from the GPS device 7 is acquired and held by the position information acquisition unit 2A. Similarly, the time information (Coordinated Universal Time) from the GPS device 7 is set in the built-in clock 1. The position corresponding time difference storage unit 3A stores the time difference corresponding to each position. The summer time storage unit 4 stores the advance time of daylight saving time corresponding to the position and the date. The calculation unit 5A obtains the position information from the position information acquisition unit 2, the time information (Coordinated Universal Time) from the built-in clock 1, and the time difference information corresponding to the position information from the position corresponding time difference storage unit 3A from the summer time storage unit 4. Obtains the summer time advance time corresponding to the location information and the date, and calculates the local time from the Coordinated Universal Time and the time difference and the summer time advance time. The display unit 6 displays the local time.

It should be noted that the GPS device 7 is a general-purpose device, and by connecting it when the timepiece is used, the price of the timepiece does not need to be higher than that when the GPS device 7 is built in.

FIG. 2 is a block diagram of a timepiece according to a second embodiment of the present invention.

The present embodiment is the GPS of the first embodiment.
A mobile telephone device 8 is used instead of the device 7. In the case of the mobile phone device 8, since the regional information is obtained, the local information acquisition unit 2B that acquires the regional information from the mobile phone device 8
A region corresponding time difference storage unit 3B is provided which stores the time difference corresponding to each region. The user of this watch manually sets the Coordinated Universal Time to the built-in clock 1, and the calculation unit 5B reads the time difference from the regional time difference storage unit 3B based on the regional information, as in the first embodiment. Calculates the local clock from the Coordinated Universal Time and the time difference and the daylight saving time advance time.

It should be noted that PHS (Pers
onal Handyphone System) may be used.

[0016]

As described above, according to the present invention,
Even if the user travels in a region with a time difference, the user of this watch can immediately and accurately know the time in that region.

[Brief description of drawings]

FIG. 1 is a block diagram of a timepiece according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a timepiece according to a second embodiment of the present invention.

[Explanation of symbols]

1 Built-in clock 2A Location information acquisition unit 2B Area Information Acquisition Department 3A position corresponding time difference storage unit 3B regional time difference storage unit 4 Daylight saving time memory 5A, 5B calculation unit 6 Display 7 GPS device 8 mobile phone devices

Claims (10)

[Claims] 1. A step of acquiring position information of a current position of a watch and Coordinated Universal Time; a step of acquiring a time difference at the current position based on the position information; and a step of acquiring the time difference based on the Coordinated Universal Time and the time difference. A local time calculating method comprising: a step of calculating a local time of a current position; and a step of displaying the local time. 2. The method according to claim 1, wherein the position information and the Coordinated Universal Time are acquired from a GPS device. 3. A step of acquiring the regional information of the current position of the clock and the Coordinated Universal Time, a step of acquiring the time difference at the current position based on the regional information, and the step of acquiring the time difference based on the Coordinated Universal Time and the time difference. A local time calculating method comprising: a step of calculating a local time of a current position; and a step of displaying the local time. 4. The method according to claim 3, wherein the area information is acquired from a mobile phone device or PHS, and the Coordinated Universal Time is acquired from a built-in clock. 5. The local time is calculated in the step of calculating the local time, when the summer time is set at the current position, in consideration of the advance time of the summer time. The method described. 6. A timepiece, wherein the time information acquiring means for acquiring and retaining position information of the current position, the time information acquiring means for acquiring and retaining the Coordinated Universal Time of the current position, and the time difference corresponding to each position are stored. A time difference storage means, a local time calculation means for acquiring a time difference corresponding to the position information from the time difference storage means, and calculating a local time of the current position from the coordinated universal time and the time difference, and the local time. A timepiece having display means for displaying. 7. The timepiece according to claim 6, wherein the position information acquisition unit and the time information acquisition unit respectively acquire position information and Coordinated Universal Time from a GPS device. 8. A timepiece, which stores area information of a current position and holds area information, means of acquiring and holds a coordinated universal time of the current position, and a time difference corresponding to each area. A time difference storage means, a local time calculation means for acquiring a time difference corresponding to the regional information from the time difference storage means, and calculating a local time of the current position from the coordinated universal time and the time difference, and the local time. A timepiece having display means for displaying. 9. The area information acquisition means acquires area information from a mobile phone device, and the time information acquisition means is a built-in clock in which the Coordinated Universal Time is manually set by a user. The listed clock. 10. A daylight saving time storage means for storing the advance time of daylight saving time corresponding to each position and month and day is further provided, and the local time calculation means is based on the position information and the Coordinated Universal Time. The timepiece according to any one of claims 6 to 9, which acquires a summer time advance time from the summer time storage means and calculates the local time in consideration of the summer time advance time.