JPH02150790A - World clock - Google Patents

Abstract

PURPOSE:To make the current time of cities other than the cities stored in a fixed state recognizable by providing a displaying means which displays the time of a selected time zone and the city selected by a city selecting means. CONSTITUTION:Whether or not a switch input is made is discriminated in Step S1 and, when a switch input is made, the process proceeds to Step S3 after executing a corresponding switch process. When no switch input is made, however, the process directly proceeds to the Step S3. In the Step 3, a displaying process is performed so that the then designated data for display can be displayed on a displaying section 10 and, after performing the displaying process, the process returns to the Step 1. When such displaying process is performed, the current time of cities other than the cities stored in a fixed state can be recognized.

Description

[Detailed description of the invention] [Technical field of invention J The present invention relates to a world clock.

[Background of the Invention] 'World clocks have been widely used in various fields as a convenient tool that makes it easy to know the local time in major cities around the world. By the way, with this kind of thing, multiple major cities and their time differences are fixedly stored in advance for each time zone, and when one of those cities is selected, the Based on the time difference of the city, etc.
It calculated and displayed the local time in that city.

Therefore, only the local time of major cities that is fixedly stored in advance in the Some World Clock can be learned, and the local time of other cities that the user particularly desires to know cannot be learned.

[Object of the Invention] The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a world clock that can also determine the local time of cities other than those that are fixedly stored in advance.

[Summary of the Invention] In order to achieve the above object, the present invention makes it possible to set an arbitrary city name in association with the time zone to which the city belongs by human power, and when the city is selected. The gist is that the local time of a city is calculated and displayed based on the time difference of the time zone to which the city belongs.

[Example] The present invention will be specifically described below based on an example shown in one drawing.

FIG. 1 is a diagram showing the circuit configuration of one embodiment. In other words, the configuration is such that the CPU is the center and other circuit units are connected to it. The oscillation circuit 2 is a circuit section that constantly outputs a signal at a constant frequency, for example, 32 KHz.
The frequency divider circuit 3 is a circuit that divides the frequency of the signal from the oscillation circuit 2 and sends a signal every minute, that is, a minute value number to the counter circuit 4 and the drive circuit 5. The clock counting circuit 4 is a circuit that counts the one-minute mark to obtain Greenwich Mean Time, and provides this to the CPUI. Further, the drive circuit 5 is a circuit that rotates the step motor 6 by a predetermined angle each time it obtains the above-mentioned 1-minute value number, and also rotates the step motor 6 in rapid traverse by obtaining a correction pulse signal SP from the CPUI. . The step motor 6 is rotationally driven by the drive circuit 5 and applies torque to the pointer 8 via the wheel train mechanism 7 to move the pointer. Note that in this embodiment, the pointer 8 always indicates home time.

The switch unit 9 includes a large number of switches, and is a circuit unit that sends switch inputs corresponding to operated switches to the CPU 1.The display unit 10 includes a liquid crystal display panel (to be described later) and displays data given from the CPUI. This is the circuit section to be displayed. ROMI 1 is a memory circuit unit that permanently stores the major cities of the world in association with time zones, that is, time differences. The RAM 12 is a storage circuit section in which various registers are arranged.

FIG. 2 shows JIIT& of the ROMII in detail. That is, ROMII consists of a city number storage section and a city name storage section, and the city name storage section is a row address O.
It consists of 2 from 24 lines of ~23, and each line corresponds to each time zone of the world divided into 24, respectively, 1 time difference area DA, 1st city area C + A, 2nd city area C2A,
It is composed of a third city area C3A and a fourth city area CsA. In the time difference area DA, the time difference in the corresponding time zone is fixedly stored.
Each or a part of city areas C, A to 4th city area Cs A stores a city code indicating a major city belonging to that time zone (that is, a city code in the range of 0 to 4 for each time zone is stored). (The city is memorized.) In the same figure, for example, the time difference area DA in the row address 1 has a time difference of 1 hour, the first city area C+A has PAR indicating Paris, and the second city area C2A has Amsterdam. AMS indicating Brussels, BRU indicating Brussels in the 3rd metropolitan area C3A, 4th a! In the city area CsA, a RAM indicating Hamburg is fixedly stored.

In addition, the city number storage section consists of 24 memories, 6 to 23, and each memory corresponds to each row of the city name storage section, that is, a time zone (for example, 1 memory in the memory
corresponds to the row address l in the city name storage section, that is, the time zone with time zone number 1), and the number of cities stored in the corresponding row in the city name storage section is fixed. , has been written.

FIG. 3 shows the configuration of the RAM 12 in detail.

The mode register N is a register that specifies the mode; when its value is 0, the home time is displayed on the display 10, and when it is l, the local time of major cities around the world is displayed by switch operation. , world clock mode when switching and displaying sequentially, and when 2, ROMI
If a city that is not stored in the city name storage section I is to be stored in the additional setting city storage section M, which will be described later.

Specify the city change mode when changing or modifying a city already stored in the additional setting city storage unit M. The set digit pointer A is a pointer that specifies the digit to be set when inputting a city using the set and select method in the city change mode. The set state flag FS is a flag that is set when input is possible in the city change mode. The time zone pointer TZ is
This is a pointer to which a time zone number is set and which specifies the time zone associated with that time zone number. The city pointer CT is a pointer that specifies one city within the time zone specified by the time zone pointer TZ at that time. When its value is 0, it is set in the additional setting city storage unit M, which will be described later. For cities 1 to 4, the first city area CI in the city name storage section.
A, the cities stored in the second city area C2A, the third city area C3A, and the fourth fI city area C4A are respectively specified. Home time zone register BTZ and home time city register BCT are registers in which the time zone and city related to home time are set, respectively.

The additional setting city storage unit M consists of 24 memories, memory Mo-M23, each corresponding to 24 time zones (for example, memory M1 has a time zone number l).
), the city name of the city in that time zone is set by key operation. The previously displayed city storage section J consists of 24 memories, including memory JO''J23.

Each corresponds to 24 time zones (for example, the memory Jl corresponds to the time zone with time zone number 1), and is used when switching and displaying the time of another time zone on the display section IO.

The city code of the city whose local time etc. were displayed on the display unit 10 until then is set.

FIG. 4 shows the display arrangement state of the display section IO. That is, the display section 10 consists of a time zone display section 13 and a time display section 14, and a semicircular world map is printed and displayed on the time zone display section 13. There are 24 liquid crystal displays, or zone displays, that display lines connecting cities and cities in each time zone. Also, on the periphery of the semicircular world map above.

The time difference in the time zone related to each zone display body is printed and displayed. In addition, the time zone number is given a number that matches the time difference when the time difference is between 0 and 12 hours, and for time zone numbers larger than that, the time zone number is 13 degrees in a time zone with a time difference of 111 hours. In the -10 hour time zone, it becomes 12, and so on, and in the -1 hour time zone, it becomes 23.

The time display section 14 includes a date section 14a and a city code section 14b1.
The date section 14a includes a 7-segment display for displaying the date, and the city code section 14b has a dot display for 3 characters for displaying the city code. The cage 1 time portion 14e is provided with a 7-segment display for time display.

In addition, as shown in FIG. 8(a), in this example,
The display section lO is arranged on the front of the watch case, and switches SA, SB, and switches 5l-33 are arranged below it and on the side of the watch case. Switches SA and SR are used to set additional cities, etc., switch 31 is used to change the display of pointer 8, and switches 32 and 53 are used to change the state or mode.

Yutaka-1 Next, the operation of this embodiment configured as described above will be explained.

FIG. 5 is a general flow chart showing an outline of the operation. That is, in step S1, it is determined whether there is a switch input, and if there is a switch input, the corresponding switch processing (step S2) is executed, and then step S
3, but if there is no switch input, the process directly proceeds from step S1 to step S3, and in step S3, a display process is performed to display the data instructed to be displayed at that time on the display unit IO. is performed, and then the process returns to step Sl.

FIG. 6 is a flowchart showing the switch processing (step 52) in detail, and FIG. 7 is a flowchart showing the display processing in detail. Also, Figures 8 and 9 are
It shows the transition of the display on the display unit 1O due to various switch processes. Hereinafter, operations along the transition of the above display will be explained with reference to each of the above flowcharts.

B. Operation in home time mode For example, if the display unit 10 now shows a display as shown in tJSa diagram (a) and the home time mode is set, step S1 of the general flowchart (Figure 5)
Every time you proceed to the display process of step S3, that is, the flowchart of FIG. 7, make sure that you are in the home time mode (step 570). and the date is calculated from the Greenwich mean time from the clock counting circuit 4 and the time difference stored in the corresponding time difference area DA of the city name storage section of the ROMII (step 571), and these are displayed on the display section IO (step 571). Step 572) Then, it is determined whether the value of the home time city register BCT is 0 or not. Step 373) If it is 0, the city is used in the additional setting city storage section M as a city belonging to the above time zone. Display unit 10 displays the city code of the city additionally set by the user.
(step 374), but on the other hand, if the value of the home time city register BCT is not 0,
Among the cities in the time zone specified in the home time zone register BTZ, the home time city register BC
The city code of the city designated by T is displayed on the display unit 10 (step 37B), and the above step S7
4 or when the processing of 376 is completed, step 57
Proceeding to step 5, the zone indicator indicating the time zone designated by the home time zone register BTZ is lit up.

(b) To switch from the home time mode to the world clock mode in the hour mode, operate the switch S3 (see Figure 8).At this time, the operation must be detected in step S10 and the set state flag FS must not be set yet. Please check step 5ll),
Change the value of the mode register N from 0 to 1 to set the world clock mode (step 512), proceed to the display process via step 513, and in the 1 display process, confirm that the value of the mode register N is no longer 0. Then, in step 570), the time 1 date of the time zone specified by the value of the time zone pointer TZ at that time is calculated from the Greenwich Mean Time from the counting circuit 4 and the time difference in the city name storage section (step 580). , is displayed on the display unit 10 (step 581), and then the city pointer C
Determine whether the value of T is 0 (step 582)
, O, the city code stored in the memory specified by the time zone pointer TZ in the memory of the additional setting city storage unit M (that is, the city belonging to the time zone specified by the time zone pointer TZ, The city code of the city additionally set by the user is displayed on display section 1.
If the value is not 0, the city specified by the city pointer CT is displayed among the cities stored in the row next to the city name storage section set by the time zone pointer TZ. The code is displayed on the display unit IO (step 583), and then the zone indicator indicating the time zone specified by the time zone pointer TZ is displayed by lighting up (step 384),
Make sure you are in world clock mode (step 585)
.

A zone indicator indicating the time zone specified by the home time zone register BTZ, that is, the time zone related to the home time, is displayed by lighting. In this way, the display on the display section 1O becomes as shown in FIG. 8(b). As mentioned above, even in this world clock mode, the pointer 8
indicates home time.

In addition, in order to check the current time in other time zones and display them in order on the display section lO from the state shown in FIG. 158(b), switch SR
At this time, each time the switch SB is operated, it is detected in step 535 and it is confirmed that the set state flag FS has not been set yet.Step 536) 1 World clock mode is set. Step 537), then proceed to the next step 53g. In step 338, the value of the city pointer CT at that time is transferred to the memory in the previously displayed city storage section J specified by the value of the time zone pointer TZ. Remember step 53g),
Set the city that has been displayed so far to be displayed first the next time this time zone is specified.0 Next, increment the time zone pointer TZ by 1 (step 539), and The time zone whose zone number is larger by 1 is specified, but when the value of the time zone pointer TZ exceeds the last time zone number 23 and reaches 24 during this increment process, it is detected in step 540 and the time Return the value of zone pointer TZ to O (step 541),
After that, among the cities belonging to the newly specified time zone, the previous display specified by the new value of the time zone pointer TZ is used to display the city that was displayed when the display related to the time zone was first displayed. The memory value in the city memory section J is transferred to the city pointer CT and set (step 542), and then display processing is started, passing through step 570, and in step 380, the value specified by the time zone pointer TZ in the same manner as described above. The current time and date of the current time zone are calculated and displayed on the display unit IO (step 581). Thereafter, the city pointer CT stores the specified city in advance in the city name storage unit as described above. What do you have?

Determine whether the city has been additionally set in the additional setting city storage unit M, and display the specified city on the display unit IO (
Steps 382, S83, 587): Further, in order to indicate the time zone newly specified by the time zone pointer TZ, the zone indicator related to the time zone is lit up, and it is confirmed that the mode is the world clock mode.

The zone display body indicating the time zone related to the home time is also illuminated (steps 584 to 586). In this way, as shown in Figure i9, each time the switch SR is operated, the current time in each time zone is sequentially displayed. The time and the like are displayed on the display section IO.

By the way, when the current time etc. of each time zone are displayed on the display section IO by operating the switch SR as described above, the displayed city is specified by the value in the memory of the previously displayed city storage section J. To change this, operate the switch SA as shown in FIG. 9. In this case, each time the switch SA is operated, the process advances from step S35 to step 555. After confirming that the set state flag FS has not been set yet and confirming that the world clock mode is set (step 556), the city pointer CT is incremented by +1, but as a result, the value of the city pointer CT is The memory value in the city number storage section specified by the time zone pointer TZ,
Namely.

When the number of cities in the time zone exceeds the number of cities stored in the city name storage section, the value of the city pointer CT is returned to O (steps 357 to 55).
9) After that, the process proceeds to step 1 display processing, and in step S8Q, the current time and date in the time zone specified by the time zone pointer TZ are calculated.

Display the result on the display unit IO (step 581)0
Next, it is checked whether the value of the city pointer CT is 0 (step 582), and if it is 0, the process advances to step 587 and the value of the additional setting city storage M specified by the time zone pointer TZ is The city stored in the memory, that is, the city additionally set by the user, can be displayed on the display unit 10. See FIG. 9(e). The letters LIS indicating Lisbon in the same figure are the city name memory in FIG. 2. If it is not stored in the city area with line address 0, the process proceeds to step S83, and the city area specified by the time zone pointers T and Z is stored in the city area in the city name storage area. The city specified by the city pointer CT out of the cities stored in is displayed on the display unit 10 (see FIGS. 9(a) to 9(d)), and then the city specified by the time zone pointer TZ is displayed on the display unit 10. The zone indicator indicating the time zone is lit, and the zone indicator indicating the time zone related to the home time is further lit (steps 384 to 38).
6).

Next, a description will be given of the operation when changing the time zone related to the home time and the city to be displayed when the home time is displayed on the display unit IO. In this case, the eighth
As shown in the figure, set to 1 world clock mode and display the current time etc. related to the time zone you want to set as home time on the display lO.
is displayed, and then operate switch S2. At this time, the operation is detected in step 520, and in step 321 it is confirmed that the world clock mode is set, and the value of the home time zone register BTZ and the time zone pointer T are
The value of Z is exchanged and the time zone number related to the time zone currently displayed on the display unit IO is set as the time zone number of the time zone related to the home time (Step 522), and the home time city register BC is
The value of T and the value of the city pointer CT are exchanged so that the city currently displayed on the display unit IO is specified in the home time city register BCT (step 523).
), then the time difference between the new and old home times is calculated from the time difference in the time difference area DA in the two rows of the city name storage section specified by the home time zone register BTZ and the time zone pointer TZ (step 524). , based on this, the pointer 8 is fast-forwarded and the new home time is displayed using this pointer 8 (step 325). After the above,
Display processing begins, and the current time and the like in the time zone related to the home time up to that point are displayed on the display unit 10 (step 370, steps S80 to S586).

8. Operation in city mode If you want to change a city that has already been set in the additional setting city storage section M, set it to world clock mode as shown in Figure 8 and switch to city change mode by operating switch S3. . At this time, the operation in step S3 is detected in step SIO, and it is confirmed that the set state flag FS is not set yet (step 511), and the value of the mode register N is set to 2.
to switch to the city change mode (step 512), and proceed to display processing via step 313. In the display processing, the current time and city of the time zone specified by the time zone pointer TZ and city pointer CT are displayed. part 1o (step 370, Sa
O~385).

Next, the city to be changed is displayed on the display section lO, but at this time, in the same way as in the world clock mode, operate the switch SB to specify the time zone to which the city belongs (Steps 535 to 542), and switch S.A.
to specify the city (steps 355 to 55)
9) This causes the city to be changed to be displayed on the display unit IO.

After the above, as shown in the fi8 diagram, the switch S2 is operated to enable input. At this time, the operation of the switch S2 is detected in step 520, and the city change mode has already been set in step 521 and step 326. Then, confirm that the set state flag FS has not been set yet (step 527), and then set the set state flag FS to enable input (step 328). After that, Set the set digit pointer A to 1 to specify the first character of the three-letter city code (Step 529), set the city pointer CT to 0 and store the memory in the additional setting city storage section M. As a result of 0 or more operations specifying , the display on the display unit 10 is shown in FIG.
As shown in e), the first letter of the city code of the city to be changed will be displayed blinking.

Next, to rewrite the first character above, operate switch SA or switch SR until the desired character is displayed. At this time, each time switch SA or switch SR is operated, Make sure that the character is specified (step S45 or step 560), and then check the first digit of the memory in the additional setting city storage M specified by the time zone pointer TZ, that is, the character to be changed. The first letter of the city code of the city in question is sequentially rewritten into other letters in alphabetical order or in reverse alphabetical order (step S46).
or step 561).

In the display process, after the time and date are displayed, the city code whose first character has been changed in the above process is displayed on the display unit 10 (step 570, steps 380 to 585).
).

After completing the rewriting of the first character as described above, the switch S3 is operated as shown in FIG. 8 in order to make the next rewriting target the second character of the city code. At this time, the operation of the switch S3 is detected in step 510, and it is confirmed that the set state flag FS is set (step S11).The value of the set digit pointer A is set to 2, and the rewriting target is set to the above second character. step 515),
After confirming that the value of the set digit pointer A has not yet reached 4 (step 516), the process proceeds to display processing, a series of processing is performed, and a display as shown in FIG. 8(f) is displayed on the display unit 10. It will be done.

In addition, to rewrite the second character, use switch SA or switch SB in the same way as the first character, but at this time, each time switch SA or switch SR is operated, the second character is rewritten. Confirm that the second character is to be rewritten (step S47 or step 562), and sequentially rewrite the storage unit related to the second character with other characters (step 34g or step 563). After that, In the display process, after a series of processes, the city code whose second character has been changed in the above process is displayed on the first display section IO (steps 370, 580 to 585).

After the rewriting of the second character is completed, switch S3 is operated in the same manner as in the case of the second character in order to make the third character of the city code the next rewriting target. At this time, the operation of the switch S3 is detected in step 510, and after passing through step Sll, the value of the set digit pointer A is set to 3 in step S15, and the third character is set as the rewriting target, and the process proceeds to display processing through step 316. A display □ as shown in FIG. 8(g) is displayed in the section 1O. Then, the rewriting of the third character is carried out by the switch SA or the switch SR, as in the above case, and as a result, almost the same operation as in the above case is performed (step S49).
．． 350 or step S64.565).

In addition, after rewriting the third character of the city code as described above, if you want to rewrite the first character again, operate switch S3. , the operation is detected in step 510, and step S11. After passing through S15.518, the set digit pointer A is set to 1 in step 517, and the first character is set as the rewriting target.

After completing the change of the city set in the additional setting city storage unit M as described above, the input state is returned to the normal state of the city change mode, as shown in FIG. This is done by operating the switch S2. At this time, the operation is detected in step S20, and after confirming in step S27 via steps 321 and 326 that the set state flag FS has not been lowered, the set state flag F is
Step 531) of lowering S to return to the normal state.

To return from city change mode to home time mode, operate switch S3 as shown in Figure 8.
At this time, the operation is detected in step SlO, and it is confirmed that the set state flag FS has already been set (step 311). After passing through steps 312 and 513, the mode register N is set to 0 in step 314, and the home time is set to 0. mode. In the display process, the home time and the city related to the home time are displayed on the display unit IO (steps 570 to 575).

The above description is about the case where a city that has already been added to the additional setting city storage section M is changed, but the case where a city is newly set to the additional setting city storage section M is generally the same.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and can be modified and applied in various ways without departing from the scope of the present invention.

[Effects of the Invention] As described in detail above, the present invention makes it possible to manually set an arbitrary city name in association with the time zone to which the city belongs, and when the city is selected, Since it is related to a world clock that calculates and displays the local time of a city based on the time difference of the time zone to which the city belongs, the local time of a city other than the fixedly memorized city is displayed in advance. This makes it possible to provide a world clock that can also be known.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the circuit configuration of an embodiment of the present invention, FIG. 2 is a diagram showing the configuration of the ROM in FIG. 1, and FIG.
FIG. 4 is a diagram showing the display arrangement of the display unit in FIG. 1, FIG. 5 is a general flowchart showing an overview of the operation of the above embodiment, and FIG. 6 is the general flowchart described above. FIG. 7 is a flowchart showing details of the display processing in the general flowchart,
FIG. 8 and FIG. 9 are diagrams showing changes in display on the display unit as a result of various switch processes. l...CPU, 2...Oscillation circuit, 3.
... Frequency division circuit, 4 ... Counting circuit, 5
... Drive circuit, 6 ... Step motor, 7 ... Wheel train mechanism, 8 ... Pointer, 9.
...Switch section, 10...Display section, 11
...ROM, 12...RAM, 13-
...Time zone display section, 14...Time display section, 14a...Date section, 14b...
・City code part, t, aC... Time part, K...
...City number storage section, L...City name storage section,
DA: Time difference area, N: Mode register. A: Set digit pointer, TZ: Time zone pointer, CT: City pointer, M: Additional setting city storage, J:・・・
Previously displayed city memory department. Patent applicant: Casio Computer Co., Ltd.

Claims (1)

[Scope of Claims] Time zone selection means for selecting one time zone from a plurality of time zones; and a first memory that permanently stores cities that belong to time zones corresponding to the plurality of time zones. means, second storage means for storing city names preset from the outside in correspondence with time zones, and selecting one city from among the plurality of cities stored in the first and second storage means. and display means for displaying the time of the selected time zone and the city selected by the city selecting means when a time zone is selected by the time zone selecting means. A world clock.