JPS584793B2 - Electronic clock with world timer - Google Patents

Description

[Detailed Description of the Invention] This invention is equipped with a world timer that allows you to call various parts of the world by operating an external operation unit such as a switch, digitally display the time on the display unit, and at the same time display the called area. It is related to watches.

Conventionally, clocks have been used to digitally display the time in various parts of the world.

This clock is equipped with a push button switch for each region, and by operating this switch, the region name and time of that region are displayed.

However, since such clocks are large and have complex circuit configurations, it is structurally impossible to apply them as they are to wristwatches. There was only a mechanical method that calculated the time in the area you wanted to know by operating a ring installed in the area.

Therefore, the present invention provides a memory that stores the time differences of various parts of the world with respect to the time of an arbitrary region, reads out each time difference information in this memory with a region call finger, and calculates this and the time of the time standard, To provide an electronic watch with a world timer, which has a simple structure and is easily miniaturized, which displays the time of a desired region by driving a digital display part according to the calculation result and also displays the called region at the same time.

Embodiments of the present invention will be described below with reference to the drawings.

1a to 1c show plane views of an electronic wristwatch with a world timer according to the present invention, and 1 indicates a watch case.
A day display section 3, a week display section 4, a second display section 5, an hour display section 6, and a minute display section T, AM, and PM display sections 8 are formed, respectively, each of which is made of a CD) or a light emitting diode (LED), and a watch case. A time adjustment switch 9, a region call switch 10, and a region setting switch 11 are attached to the same side wall of the clock case 1, and the watch case 1 corresponding to the outer periphery of the display surface 2 is equipped with a region where the time is to be displayed, such as Tokyo, When London, Paris, etc. are specified at a predetermined angular position and the area call switch 10 is turned on, the digits on the date display section 3 will be
For example, the numbers "l", "2"... "l2" are displayed in sequence, and when "1" is displayed, it is a call to Paris, and when "5" is displayed, it is a call to Tokyo. , "10", it is set in advance so that New York is called.

FIG. 2 shows an example of a block diagram of an electronic wristwatch with a world timer according to the present invention.

In the drawing, 20 is an oscillation circuit equipped with a crystal oscillator serving as a time standard, and 32,768H from this oscillation circuit 20 is
The signal z is frequency-divided by a frequency dividing circuit 21 into a signal once per second, and after being waveform-shaped into a pulse, it is introduced into a second/counting circuit 22 .

Further, the output of the seconds/counting circuit 22 is sent as a minute signal to the minute/counting circuit 23 via the OR gate ORm, and the output from the minute/counting circuit 23 is sent as an hour signal to the OR gate ORm.
The day signal output of the time/count circuit 24 is introduced into the day/count circuit 25 and the day/count circuit 26 via respective OR gates ORw and ORd. .

In addition, the seconds/counting circuit 22, minutes/counting circuit 23, hours/
Counting circuit 24, day/counting circuit 25, and day/counting circuit 2
Each count signal from 6 is introduced into each separate decoder 21-31, and each output of second, minute, hour, week and day from this decoder 27-31 is introduced into each separate drive circuit 32-36. , each of the drive circuits 32 to 36 drives the second display section 5, minute display section 7, hour display section 6, day display section 4, and day display section 3, respectively.

The second, minute, hour, and day signals from the decoders 27 to 30 are sent to separate AND gates ANDs, ANDm, ANDh, and A gated by the signal from the inverter INV.
The signal is input to each of the drive circuits 32 to 35 via the NDw.

Further, 37 to 39 are arithmetic circuits connected to the output sides of the time/counting circuit 24, day/counting circuit 25, and date/counting circuit 26, respectively. Corresponding time difference information is introduced from a memory 40 that stores time differences around the world (including the hour, day of the week, and day) with respect to the time based on the time of day such as Midway, and this information is sent to the arithmetic circuit. 3
7, the carry output of the calculation circuit 37 is calculated with the count signal of the counting circuit 24, and the carry output of the calculation circuit 37 is calculated with the count signal of the respective counting circuits 25 and 26 in the calculation circuits 38 and 39, and the calculation result is manually input to the decoder. Then, the day display section 3, day display section 4, and hour display section 6 are driven to display the time of the desired region.

41 is an address counter that specifies the address of the memory 40, and this address counter 41 is connected to the frequency dividing circuit 2.
A pulse signal of 1 to 1 time per second is introduced via the AND gate AND1, and the AND gate A is input by turning on the area call switch 10.
When a gate signal is introduced into ND1, pulse signals from frequency dividing circuit 21 are sequentially input to address counter 41,
The storage addresses of the memory 40 are sequentially designated according to this count value, and the time difference information of the designated addresses is sent to the calculation circuits 37 to 39.
Enter.

On the other hand, the signal generated by the ON operation of the area call switch 10 is prohibited to the inverter INV, and each display section 3
7 (and the display section 8), and at the same time, the signal input as the gate signal of the AND gate AND2 and output from the address counter 41 is input to the AND gate A.
It is introduced into the day decoder 31 via the OR gate OR1 connected to the output side of the day/counting circuit 26 and the drive circuit 36, and the drive circuit 36 drives the digits of the day display section 3 to display the count value of the address counter 41.

In other words, this displayed numerical value tells you what area the call is being made to.

Note that 42 is an input control circuit operated by the time correction switch 9, and signals from this control circuit 42 enter each counting circuit through OR gates ORm, ORh, ORw and ORd in response to the switch operation, and read the counting contents. change,
The display of each of the display sections 4 to γ is corrected.

Next, the operation of the electronic timepiece of the invention constructed as described above will be explained.

In FIG. 1a, the time displayed as 8:58 a.m. on Wednesday the 28th is, for example, the time in Tokyo.

To display the time in another region, for example Paris, in this state, first press the region call switch 10 and keep it in the ON state.

When the area call switch 10 is turned on, this signal opens the AND gate AND1 and introduces the pulse signal from the frequency divider circuit 21 to the address counter 41 via the AND gate, and at the same time prohibits input to the inverter INV. is multiplied and controls the input from each counting circuit 22 to 26 to each driving circuit 32 to 36}A
NDs, ANDm, ANDh, ANDw and ANDd
becomes non-conductive.

Therefore, all displays of the day, day of the week, hours, minutes, seconds, AM, and PM are erased.

On the other hand, the count output of the address counter 41 is introduced to the date decoder 31 via the AND gate AND2 and the OR gate OR1, which are gated by the ON operation of the local call switch 10. The date display section 3 of the display surface 2 in FIG.
The count value of the address counter 41 is displayed sequentially.

In other words, if the Tokyo area call number displayed as shown in FIG. ”, “7”, . . . “12”, and when rlJ is displayed again, this becomes the calling number for Paris.

Therefore, if the area call switch 10 is turned OFF at this point, each AND gate ANDs, ANDm, ANDh
, ANDw, ANDd are restored to conductive state, and at the same time, by the address designation of the address counter 41 to the memory 40 along with the display of the local call number "1", the time difference information of the address is stored in the day, day, and hour arithmetic circuits 37 to 39. is input to the drive circuit 34 through each decoder after being calculated with the count signals from each of the counting circuits 24 to 26.
.about.36 to drive each separate display section.

Therefore, on the display screen 2, as shown in FIG.
Tuesday, 11:58 p.m. is displayed.

At this time, unless the area call switch 10 is operated, the time in Paris continues to be displayed on the display screen 2.

FIG. 3 shows another embodiment of the electronic watch of the present invention in which the time in various parts of the world is called up, and when the called time is displayed, the display can be immediately reset to the time in the area where the watch owner always uses it. In this block diagram, parts indicated by the same reference numerals as in FIG. 2 have the same structure.

Further, reference numeral 50 is a latch circuit for memorizing a calling area which is always used by the watch owner.
An arbitrary area designation signal outputted from the latch circuit 50 is stored, and the designation signal of the latch circuit 50 is introduced into the memory 40 via an AND gate AND3 and an OR gate OR2.

Furthermore, the area designation signals sequentially output from the address counter 41 when the area call switch 10 is turned ON are introduced into the memory 40 through the AND gate AND4 and the OR gate OR2, and are further input to the AND gate AND.
2 and the OR gate OR1 to the day decoder 31.

Furthermore, the set output of the flip-flop FF, which is set by the ON operation of the local call switch 10, is directly introduced into the input side of the AND gate AND4 as a gate input, and the inverter INV1 is connected to the input side of the AND gate AND3. The set output of the flip-flop FF is introduced as a gate input through the gate.

Therefore, as in the case of the above embodiment, the local call switch 1
When 0 is turned ON, this signal is applied to flip-flop FF5.
Set 1 and gate the AND gate AND4, and at the same time gate the AND gates AND1 and AND2,
Erases all display on each display section.

Therefore, the address counter 41 operated by the pulse signal from the frequency dividing circuit 21 sequentially outputs count value signals for specifying the area, and this output signal is processed by the AND gate AND.
4-OR gate OR2-AND gate AND2-OR gate ORI is input to the date decoder 31 to operate the drive circuit 36, and the count values "1", "2", etc. corresponding to the region are displayed on the day display section 3. ...is displayed in sequence.

When the area call switch 10 is turned off when the number "5" is displayed on the date display section 3, the time difference information in the memory 40 at the address specified by this final call signal is read out. Hour, day of the week, day calculation circuits 37 to 39
After being inputted to the counting circuits 24 to 26 and subjected to calculations with the counting signals outputted from the respective counting circuits 24 to 26, the respective decoders 2
9 to 31 are input to the drive circuit, and as shown in FIG. 1a, Wednesday, the 28th, 8:58 a.m. is displayed.

For example, let this be the time in Tokyo. At this time, if the person in possession of the watch is staying in Tokyo, the Tokyo time can be set by operating the area call switch 10 so that even if the time in another area is called up and displayed, the time can be immediately set to Tokyo time. When called, press the region setting switch 11, store the Tokyo region designation signal output from the address counter 41 in the latch circuit 50, trigger the flip-flop 51 via the OR gate OR3, and close the AND gate AND4. Set the clock to normal state.

In this state, if you want to display the time in another region other than Tokyo, turn on the region call switch 10 again, operate the address counter 41 in the same way as above, and set the number displayed on the date display section 3 as desired. When the area number is reached, if the area call switch 10 is turned OFF, the time difference information in the memory 40 at the address specified by this final call signal is read out.
The time corresponding to this is displayed on the clock display screen 2, for example, as shown in Figure 1C.
The display will be switched to .

In addition, unless you operate the area call switch 10 at this time,
The above display will continue.

In addition, when switching from the above display state to the Tokyo time again, press and release the area call switch 10 for a short time, the display on each display section will first be erased in the same way as above, and then the Tokyo time stored in the latch circuit 50 will be cleared. A region designation signal is introduced into the memory 40 through an AND gate AND3 and an OR gate OR2, and the time difference information of the designated address is read out and added to each arithmetic circuit 37 to 39, and the time corresponding to the result of the arithmetic operation is calculated as shown in FIG. It will be displayed as shown in a.

Therefore, according to this embodiment, when the time of an arbitrary region is displayed and the time of a region that is constantly used is to be displayed instead, the region call switch 10 is turned ON until the region is called. This makes the operation easier.

As described above, according to the electronic watch with world timer of the present invention, a memory is provided which stores the time differences of various parts of the world with respect to the time of an arbitrary region, and each time difference information in this memory is transferred to the region call switch and the region call pointer of the address counter. Read it now, calculate this and the reference time of the above arbitrary area, drive the digital display section based on the calculation result to display the time of the desired area, and at the same time use the area call command signal from the upper layer address counter. The calling region is also displayed by driving some of the digits on the display section, so there is no need to worry about the troublesome operation of conventional world timer watches, and the operation can be performed with a single touch. The structure is simple and can be easily miniaturized, making it extremely suitable for electronic wristwatches.

In the display device, since the time display is turned off and the desired area is displayed, the operator can clearly know the desired area and the operation becomes easy.

[Brief explanation of the drawing]

Fig. 1 shows an electronic watch with a world timer according to the present invention, in which Fig. 1A is a plan view showing normal time display, Fig. 1B is a plan view showing a state in which a region is called, and Fig. 1C is a plan view showing a state in which a region is called. FIG. 3 is a plan view showing a time display of a desired calling area. FIG. 2 is a block diagram showing an example of an electronic timepiece with a world timer according to the present invention, and FIG. 3 is a block diagram showing another embodiment of the electronic timepiece according to the invention. 1...Watch case, 2...Display surface, 3
~8...Display section, 10...Region call switch, 11...Region setting switch, 20...
...Oscillator circuit (time standard), 40...Memory, 41...Address counter, 50...
...Latch circuit.

Claims (1)

[Claims] 1. In an electronic watch equipped with a time standard, a clock electronic circuit, and a digital display, a memory is provided that stores the time differences around the world with respect to the time in any region, and each time difference information in this memory is The region call finger of the address counter operated by the call switch is read out, and this and the reference time of the upper arbitrary region are calculated by the arithmetic circuit, and the display section is driven based on the result of the calculation to display the desired region. The display device is equipped with a display device that displays the time, and in response to the operation of a region call switch that calls up the time of the desired region, the display is configured to erase the currently displayed time display of any region and select the desired region. An electronic clock with a world timer characterized by displaying region designation on some digits of the device.