JPS6113995Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to an electronic digital world clock that can display the time of a desired country whenever necessary. Traditionally, wristwatches called world clocks include pointer and display-type analog wristwatches that are equipped with a rotating ring with place names from all over the world printed on the surface of the dial. Devices that read the country's time have been commercialized, but they are not easy to operate and the time reading is inaccurate. In recent years, digital display type electronic wristwatches using liquid crystals, light emitting diodes, etc. have been put into practical use and have become widely popular. The present invention provides an electronic digital world clock as an applied product of this digital electronic wristwatch, which is provided with a plurality of button switches and digitally displays the time of a desired country on a display device by operating the button switches. It has an easy-to-read digital display with simple button operations. In order to make the world clock easy to use, it usually displays the time of the region where it is used frequently, such as the time of the place where the user lives.
By configuring the button switch to display a different time only when the button switch is operated, and automatically returning to the original time after a certain period of time, and by configuring the button switch with a touch switch, it can be configured to display a different time only when the button switch is operated. The aim is to improve reliability and reduce manufacturing costs compared to the previous model, and will be explained in detail below along with the drawings. First, the appearance of a watch body and its operating method will be explained as an example of the present invention, and then the electronic circuit constituting the watch body will be explained. FIG. 1 shows an external view of a watch body showing an embodiment of the present invention. Reference numeral 1 represents a watch body, and reference numeral 2 represents a display device, in which a liquid crystal display device is employed as an example. Reference numeral 3 denotes a time display section of the display device 2, and the time display section 3 is composed of an hour display section 4, a minute display section 5, a date display section 6, and an AM/PM display section 7. Reference numeral 8 denotes a place name display section of the display device 2, in which place names from all over the world are printed on the panel glass or cover glass constituting the display device 2, and the place name of the country corresponding to the time displayed on the time display section 3 is displayed. It is displayed with a frame around it. In the figure, the letters TOKYO are surrounded by a frame, indicating that the time is being displayed in Tokyo, that is, in Japan. 9, 10, . . . 20 are a group of 12 button switches arranged around the display device 2. Further, as shown in the figure, a place name is printed on each button switch, and a place name is also printed between two adjacent button switches.
That is, the letters LONDON are printed on button switch 9, the letters CAIRO are printed on button switch 10, and the letters LONDON and CAIRO are printed on button switch 9, and between these button switches 9 and 10,
The words PARIS and ROME are printed on it. This means that these button switches 9, 10..., 2
When 0 is operated individually, the time of each printed place name is displayed on the time display section 3, and the place name display section is structured so that the place name is enclosed in a frame. That is, when the button switch 9 is operated, the time display device 3 changes to the time in London (England), and the London part of the place name display section is surrounded by a frame. Furthermore, when two adjacent button switches are operated, the time and place name printed between the two button switches are displayed in the same manner as described above.
That is, when button switch 9 and button switch 10 are operated simultaneously, the time and place names of Paris and Rome are displayed. Therefore, if configured as in this example, it is possible to display the time in 24 locations using 12 button switches. By the way, when the button switches 9, 10, ... 20 are not operated, the main place names and their times are displayed on the display section 2, and the button switches 9, 10, ...
..., 20 is operated, the time of the place name corresponding to that button switch is displayed, and after the operation, the display automatically returns to the main place name and its time display. Further, the main place name and time can be set at the discretion of the wearer of the wristwatch, for example, the time can be set to the time in the area where the wearer lives. In other words, mainly set the most frequently used area, and use button switches 9 and 1 for other necessary areas.
By manipulating 0, . By doing this, you can read the time in frequently used areas without pressing a button, and even if a button is pressed by mistake when carrying the phone, the time display will automatically return to the time in the main area, so there will be no misreading or trouble. The difference has been resolved. It goes without saying that this main display can be changed arbitrarily by the wearer, for example by pushing or pulling the crown 21 and then operating the button switch for the name of the place he or she wants to use as the main display. It's now set. In addition, these button switches 9, 10,...
..., 20, the principle of which will be explained in detail later, consists of a touch switch that detects the skin resistance or capacitance of the human body. Therefore, these button switches 9, 10,...
..., 20 only needs to provide an electrode on the surface of the watch body 1 and connect it to the electronic circuit inside the watch body.
Compared to the contact type switches used in conventional electronic wristwatches, there are no moving parts or contact parts, so the number of parts is significantly reduced, and the reliability of the moving part is waterproof, and the contact part has long-term stability. I was able to see a significant improvement. Therefore, it is possible to arrange 12 button switches as in this embodiment, and it is almost impossible to put this into practical use with conventional contact type switches. This is one of the features of the present invention. In addition, in this configuration example, a place name is printed on the operation section of the button switch as shown in the figure to facilitate operation, and a place name display section is provided on the display section so that the place name corresponding to the displayed time is displayed. It's getting old,
Eliminates errors in displayed content. Furthermore, the display contents of the present invention include hours, minutes, and
The date, morning, and place name are displayed, which is the minimum necessary content for world time. In other words, if it is the time in your home country, you can intuitively determine the date, morning, and afternoon, but in different countries with different time zones, it is difficult to immediately determine whether the date is the same as your home country, the previous day, or the next day. The displayed content is the minimum necessary. FIG. 2 is an external view of a watch body showing a second embodiment of the present invention. In the figure, 22 is a watch body, and 23 is a display section, which consists of an hour display section 24, a minute display section 25, a date display section 26, an am/pm display section 27, and an arrow 28 for displaying place names. Button switch group 2
9, 30, ... are arranged around the display section 23 in the same way as in Fig. 1, and the button operation method is also the same as the first one.
This is similar to the embodiment shown in the figure. As is clear from the figure, the difference is that the place name display has become an arrow 28..., and there are button switch groups 29, 30... around the display area.
Since there is a place name written on it, the place name was displayed by lighting an arrow pointing to the place name. In the figure, the arrow pointing to TOKYO is lit, indicating that the time is displayed in Tokyo, that is, in Japan. This embodiment has the advantage of being simple and easy to see, since there is no need to print a large number of place names in a narrow area as in the embodiment of FIG. Another advantage is that the area for the time display can be made larger. FIG. 3 is an external view of a watch body showing a third embodiment of the present invention. In the figure, 31 is the clock body, 32
A display section is composed of a time display section and an arrow 33 for displaying place names, similar to those in the first and second embodiments. Place names 34 are printed around the display section 32 in areas corresponding to arrows 33 for displaying place names. As in FIG. 2, the time of the place name 34 is displayed by lighting up the arrow corresponding to the place name 34. Numerals 35 and 36 are button switches, and unlike the embodiments shown in Figs. 1 and 2, their major feature is that they are composed of two buttons.
A place name is selected using buttons 35 and 36, and the time of that place name is displayed. Therefore, the button 35 is used to select place names around the display 32 in a clockwise direction, and the button 36 is used to select place names in a counterclockwise direction, so that each touch advances the place names to the right and counterclockwise, respectively. The desired place name is selected by operating the button closest to the desired place name.
Although the operation is more troublesome than the embodiments shown in Figures 1 and 2, there is no need to worry about misunderstanding the place name 34 due to the arrows, and above all, it can be realized with two buttons, and it is easy to use when configuring the watch body. It's advantageous. FIG. 4 is an external view of the clock body showing the fourth embodiment of the digital world clock of the present invention, where 37 is the clock body, 38 is the display section, and the time display section and place names as in the embodiment of FIG. 3. Consisting of an arrow 39 for display,
A place name 40 corresponding to this arrow 39 is printed around the display section. By lighting up an arrow corresponding to the place name, the place name is indicated and the time of the place is displayed. Reference numeral 41 denotes a button switch, which in this embodiment consists of five switches. These 5 button switches 4
1 is designed so that each button can be set to correspond to one place name according to the convenience of the user of this watch body. The setting method is to pull out the side button 42 and operate the desired button. Each touch selects a place name one step at a time. When the desired place name is selected, press the side button 42.
This is done by pressing the In this method, in addition to the main time, it is possible to know the times in five regions by operating the button switch 41. By setting the five regions where the user of the watch body uses the watch most frequently, you can easily find out the time in those five regions.
It is extremely advantageous in that it can be tailored to the individual's wishes with a small number of button switches. The fourth embodiment of the present invention has been described in detail above. Although each embodiment has its own characteristics, the common idea of the present invention is to display the hours, minutes, date, am, pm, and place name or equivalent at a minimum. Therefore, this display is essential for knowing the time in a foreign country. By configuring the button switch as a touch switch that is activated when touched with a finger, etc., this not only improves the reliability of the switch and reduces costs, but also allows a large number of switches to be placed in the small space of a wristwatch. Therefore, the world clock has been made into a wristwatch that can tell the time in more than 10 regions. The main time can be changed at will according to the convenience of the user, so that the most frequently used time is the main time, and this is always displayed, even if there is an erroneous operation. Automatic recovery eliminates misreading. Note that the place name display and arrow display can be made into other symbol patterns, and they can be made easier to read if they are blinked instead of simply lit. The embodiment of the present invention has been explained in detail above using the external view of the watch body, and further explanation will be given below using a specific electronic circuit diagram for realizing the same. A circuit block diagram showing an embodiment of the present invention is shown in FIG. The outline of the block diagram is as follows. 4
3 is a standard oscillation circuit using a crystal resonator, 44 is a frequency dividing circuit, 45 is a sexagesimal counter, and 47 is a timing pulse generating circuit for generating a digit signal and a bit time signal. A touch switch keyboard 49 is a touch switch detection circuit and a time difference signal generation circuit. 52 is a clock part, 53
is a gate switching circuit, 54 and 55 are minutes, hours,
Counting shift register for counting AM, PM, day, month, 56 is large moon detector, small moon detector, 57 and 6
0 is an adder, 58 is a 4-bit auxiliary register, 59
is a carry detector, 61 is a gate switching circuit, 6
2 is a decoder circuit, and 63 is a liquid crystal display or electrochromic display including a display register. Next, each block will be explained. The oscillation circuit 43 uses a crystal resonator, and the oscillation frequency is 2 ⁿ Hz, for example, 32768 Hz. 2 ⁿ Hz is a frequency widely used for quartz crystal watches, and the accuracy and reliability of quartz crystal resonators have been proven. The crystal oscillator used is a tuning fork type, a bent type oscillator with free ends, or a longitudinal oscillation type oscillator. Note that the standard oscillator is temperature compensated using barium titanate capacitors, thermistor palisters, etc., and is highly accurate. The frequency dividing circuit 44 consists of a 1/2 frequency divider, and divides the source frequency to 1 Hz. sexagesimal counter 45
takes out a 1 Hz signal from the frequency dividing circuit 44, and generates a frequency divided by 1 signal 46 (signal 1' in FIG. 6), which is constituted by, for example, a hexadecimal counter or a hexadecimal counter or a hexadecimal counter. In the timing pulse generation circuit 47, the signal frequency-divided by the frequency dividing circuit 44 is converted into the digit signal shown in FIG.
D ₁ to _{D 2} and bit time signals T ₁ , T ₂ , T ₄ , and T ₅ are converted and generated (48). For example, if the source frequency is 32768Hz, the period of the digit signal is 512
Hz, the period of the bit time signal is 4096Hz. That is, D ₁ to _{D 2} are approximately 2 msec, and the 1-frequency divided signal 46 described above can operate as a counting signal if the pulse width is at least 2 msec in synchronization with the rising edge of D ₁ . The touch switch keyboard 49 utilizes human skin resistance or human body capacity, and a plurality of touch switch keyboards 49 are provided around the display body as shown in FIGS. 1 to 4 described above. The touch switch detection circuit and time difference signal generation circuit 50 detects a signal when a part of the human body touches the touch switch, and generates a time difference signal 51. When a part of the human body touches the touch button, the P signal shown in FIG. 6 is generated. This P signal has a pulse width from _D1 to _D5 , and one pulse is always generated only when the touch button is touched (synchronized with the rising edge of _D1 ). Next, the clock section 52 will be explained. The counting shift register 54 consisting of 4 bits and the counting shift register 55 consisting of 28 bits are half-lay type static shift registers. During the normal clock function, the 1-minute signal 46 is added by the adder 57 at the timing α (generated in synchronization with the 1-minute signal, the pulse width is D ₁ to D ₂ ) shown in FIG. 6, and the 4-bit auxiliary The signal is sent to the decoder circuit 62 via the register 58 and the adder 60, passes through the gate switching circuit 61 that turns on at timing α, is transferred to the counting register 55, and its output is introduced again to the adder 57. The signals are added in adder 57 to form a similar circular loop. Therefore, at this time, the counting register 54 is not selected because the gate switching circuit 53 is turned off at the timing α. Further, the clock signal of the register is generated in synchronization with the one-minute signal, and power consumption is reduced by performing signal transfer once per minute. 56
is a large moon/small moon detector, which determines the 31st, 30th, or 28th (29th). 59 is binary, 6
When a carry is detected in the decimal, decimal, and decimal carry detection circuits, a carry addition signal to the next digit is generated, and the adder 6
Addition is performed by 0. When you touch a touch button, that is, when you want to know the time in a certain country, the time difference signal 51 is generated by touching the specified touch button, and the time difference signal 51 is added to the current time by an adder 57 at the timing β. The signal is transferred to a decoder circuit 62 via a 4-bit auxiliary register 58 and an adder 60. The output of the adder 60 is when the gate switching circuit 61 is at the timing β.
Since it is OFF, it is not transferred to the count register 55. Further, at timings other than α, the gate switching circuit 53 is turned on, and the signal is circulated within the counting registers 54 and 55. When the one minute signal 46 is generated, one minute is added at the timing α described above, and the added contents are circulated through the counting registers 54 and 55. Therefore, even if the time difference signal 51 is generated, the current time count registers 54 and 5
5, so when you release your finger from the touch button, you can return to the original main display again. Finally, the decoder circuit 62 and clock section 63 will be explained. The decoder circuit 62 includes a shift register for reading one digit data, a decoder for BCD→segment conversion, and a P/S for converting segment parallel signals into segment serial signals.
It consists of a conversion type shift register.
A zero subless signal is input to the BCD→segment conversion decoder to blank out unnecessary digits for display. The display section 63 includes a display register, and the segment serial signal is transferred to and stored in the display register only when the display content changes, and is connected to a display (liquid crystal or electrochromic display) in which each bit corresponds one-to-one. A static display of each segment is performed. Next, the touch switch detection circuit, time difference signal generation circuit 50, and clock section 52 will be explained in detail. In one embodiment of the present invention, 24 signal systems are generated by touching a touch button, and the 24 signal systems are controlled by an encoder from 0 to
A case will be described in which the time difference correction signal becomes a 23-hour time difference correction signal, and the time difference correction signal is added to the standard time by an adder and displayed. As the standard time setting, it is preferable to select a point on the earth where the time is the slowest, such as Midway. The following table shows the time differences and some of the place names for the 24 signal systems.

[Table] The place names in the table above are the same as those shown in Figure 1, and can be displayed by touching the place where the desired place name is displayed. At this time, it is sufficient to operate one or two switches at the same time as described above. FIG. 7 shows an example of a touch switch detection circuit that utilizes the skin resistance of the human body. As is clear from the figure, the detection circuit uses the CMOS gate as a receiver to detect the signal. As mentioned above, there are 12 touch buttons, and the number of circuit elements is reduced by sharing the signal systems for 0 to 11 and 12 to 23.
Figure 8 shows a timing chart during operation. 64 to 75 are touch buttons, and the relationship with the above table is that the touch button 64 is located in Honolulu (first
16) in the figure, the touch button 65 is Los Angeles (17 in Figure 1), and from 66 onwards, it is Chicago, Santiago...Sydney, Oakland (see Figure 1). Therefore, the touch buttons 64 to 69 can obtain time difference correction signals for 0 to 11 hours, and the touch buttons 70 to 75 can obtain time difference correction signals for 12 to 23 hours. The currently displayed time is the time in Midway, but we will explain the operation when you want to know the time in Dawson, for example. In FIG. 7, when the fingertip is not touching the touch button, the inputs of CMOS inverters 76 and 77 are biased to High (V _DD ) via high resistance R ₁ . The resistor R ₂ is used to protect the inputs of the CMOS inverters 76 and 77, and prevents input damage to the CMOS gates due to instantaneous abnormal voltages caused by static electricity or the like (approximately 1 MΩ). However, CMOS gates have very high input impedance and have a built-in protection circuit against instantaneous abnormal voltages consisting of protection diodes and resistors, so they can withstand even abnormal voltages applied. Next, when touch buttons 64 and 65 are touched with fingertips that are at the same level as the ground potential (V _SS =Low level), the CMOS inverter 7
The input voltage/level of 6 and 77 is R _S
Then, R _S /R _S +R ₁ ·V _DD becomes, and when R ₅ << R ₁ , it becomes approximately OV (according to experiments, the skin resistance R _S of the human body varies from person to person, but it takes a value of approximately 10 MΩ or less. Therefore, set R ₁ to 22MΩ, for example). However, touch button 6
4 and 65 at the same time, the input waveforms of CMOS inverters 76 and 77 always have a time delay on one side as shown in FIGS. 8A and 8B. This time delay is unavoidable because the time required for the potential to drop to approximately OV according to the above equation differs due to the difference in contact area between the fingertip and the touch button, that is, the difference in contact resistance. The input waveform is applied to CMOS inverters 76 and 7.
7, the output waveform becomes as shown in FIG. 6C and D. In the figure, the waveform has chattering. When these outputs are input to the NOR gate 78 through the OR connection 78b, the other OR connection 78a is low, so the output is as shown in Fig. 8E.
becomes. When this is used as the set input of the R-S flip-flop 79 and a reset signal, which will be described later, is inputted, the output waveform when priority is given to the set input is as shown in FIG. 8F. Here, the chattering waveform has been removed. The output waveform is inverted by an inverter 80, and when a resistor 81 and a capacitor 82 with one terminal connected to Low are connected to the output side of the inverter 80, the output waveform of the inverter 80 changes from High to High as shown in FIG. 8G. When the level changes to Low (that is, when the capacitor 82 is discharged), the waveform becomes dull. When this waveform is shaped by the converter 83, the 8th
When the signal is inputted to the AND gate 84 together with the output when the set input is given priority, the set signal pulse shown in FIG. 8I is generated. This set signal pulse has the role of preventing malfunction, and is indispensable in the detection circuit according to this embodiment. That is, there is a delay in the signals of both outputs when I consciously touch two touch buttons, and I intended to operate only one touch button, but my fingertip shifted and slightly touched the adjacent button. The signal delay time of both outputs in the latter case is clearly larger. This is due to the above-mentioned difference in contact resistance, and the pulse shown in FIG. 8I is used to distinguish between normal operation and malfunction. Therefore, a certain time width is set from the earliest input signal, and unless the next input signal is input within the time width, that input signal will not be detected.
This time width is appropriately set by a resistor 81 and a capacitor 82. On the other hand, the output of NOR gate 78 is OR gate 85
through another R-S flip-flop 86
If 32Hz is selected as the reset input, the output waveform when priority is given to the set input will be as shown in FIG. 8J. If this is delayed by 32Hz with a D-type F/F87, the Q output becomes K in FIG. 8, and if it is further delayed by 256Hz with a D-type F/F88, the Q output becomes L in FIG. When these outputs are input to the NOR gate 89, the pulse shown in Figure 8 M is output, and when it is further delayed by 256Hz, the Q
The output 91 is as shown in FIG. 8N. This is the P signal mentioned above, which is generated whenever the fingertip touches the touch button. When two of the aforementioned outputs are input to the NAND gate 92 as shown in FIG. 7, the output becomes O in FIG. This is the reset signal and is used as the reset input of the R-S flip-flop 79 mentioned above. Inverters 76 and 77 described above
The output is inputted to AND gates 93 and 94 together with the aforementioned set signal, and only a signal having the pulse width of the set signal is taken out (FIG. 8, P and Q).
This signal is inverted by NOR gates 95 and 96 and becomes the set input to R-S flip-flops 97 and 98. On the other hand, the reset input inputs the above-mentioned reset signal. Then, the outputs of each flip-flop become R and S in FIG. 8, and the output of the NOR gate 99 becomes T in FIG. The operations described above are for when two touch buttons are touched, and the output thereof is the output of the NOR gate 99. In addition, since the output of each touch button is also available at the same time, NOR
When a signal is generated at the output of gate 99, the output of each of the touch buttons must be cut off. Therefore, when the signal shown in FIG. 8U is inputted to the NOR gates 101 and 102 by the NAND gate 100, the output thereof remains low and is not output. Therefore, only the output of NOR gate 99 is transmitted to the encoder, and only the _T2 signal is selected. The T ₂ signal means 2, and as mentioned above, the time at Dawson is two hours ahead of the time at Midway, so this T ₂ signal is sent to the next adder as the time difference correction signal 108. AND gate 104
The reason why the D ₂ signal is input is that D ₂ corresponds to the unit of "hour" in the counting register, which will be described later. The above explanation was an operation for generating the time difference correction signal 108 for 0 to 11 hours. Although the case where only one touch button is operated is omitted as it is clear from the above explanation, a positive time difference signal of 12 to 23 hours is generated as follows. When any of the touch buttons 70 to 75 is touched, the OR connection 78a changes from Low to High. If you input this to the clock signal of the D-type F/F105 and input High to the data signal, the Q
The output changes from low to high in synchronization with the clock signal going from low to high. _D4 corresponds to the "10 o'clock" unit of the counting register, which will be described later, and by inputting the _T1 signal there, it is possible to correct the time difference of 12 to 23 hours, so AND gate 1
06, D ₄ and T ₁ are input. The rest is exactly the same as the above explanation, and the time difference correction signal 108 is obtained by the OR gate 107. For example, if you touch touch button 73 (+19 hours), AND gate 10
4 is 0111, but from AND gate 106 is 0001
That is, 1 is output, and since it is a decimal number, OR gate 10
The output of 7 will be 19. This is the time difference correction signal 108
becomes. As described above, a malfunction is detected by the malfunction prevention circuit, and the output signal system is divided into two parts, which are shared by the same circuit, which simplifies the circuit. Furthermore, although the above description relates to a touch switch that detects human skin resistance, it can be converted to a touch switch that detects human body capacitance with a similar circuit configuration. A part of the detection circuit is shown in FIG. 9. When the touch button 109 is touched with a finger, the inverter 110
The output signal (64Hz) of NOR gate 11 is distorted.
A pulse is generated at 3. This pulse is generated while the finger is touching the touch button 109, and a pulse having a certain width is generated in synchronization with the rising edge of 64 Hz. If this pulse is used as a reset signal for the D-type F/F 114 through OR connection, a signal that goes high when a finger touches the touch button 109 is generated from the output. By using this signal to create the aforementioned set signal and reset signal, a time difference correction signal can be obtained with a circuit configuration similar to that shown in FIG. In this way, the display switching signal (time difference correction signal) can be generated with a simple operation, and the switch section has good reliability, making it ideal as an input for a world time wristwatch. Next, the clock section will be explained based on FIG. 10. In the figure, some of the same numbers as in the block diagram of FIG. 1 are used. As mentioned above, it is composed of counting shift registers 54 and 55, large moon and small moon detectors 56, adders 57 and 60, 4-bit register 58, and detector 59. The counting shift registers 54 and 55 are used for month, day, AM,
This is a static shift register for storing PM, hours, and minutes, and consists of 32 bits. The above-mentioned digit signals D ₁ -D ₂ are assigned to each register to facilitate carry detection. In this example, the minute digit is D ₁ , the 10 minute digit is D ₂ , the hour digit is D ₃ , the 10 o'clock digit is D ₄ , and the October digit is D ₅ . The operation during normal one-minute signal addition is as follows. For example, assuming the current time is 10:30 p.m. on January 31st,
The time signal is stored in the counting shift registers 54 and 55 in the form of a BCD code. Clock signal 117 for counting shift registers 54 and 55
occurs once per minute in synchronization with the 1-minute signal, and transfers data. The 1-minute signal is shown as 1' in FIG. 6, but since this is the same as the α signal in the same figure, the discussion will proceed hereafter assuming that the 1-minute signal is α. When the α signal is generated, the counting shift registers 54 and 5
The time data stored in step 5 passes through AND gate 118. Since there is no input from AND gate 119, the time data is EX-OR gate 1
20 and becomes one input of the EX-OR gate 122. On the other hand, the α signal is processed by AND gate 121.
D ₁ T ₁ α becomes one input of the EX-OR gate 122. Here, both signals are added, and a BCD signal indicating 10:31 pm on January 31st is transferred to the input of the 4-bit auxiliary register 58. Since there is no carry in the addition, the carry detector 59 does not operate, and the carry signal 138 remains High without being generated. Since the carry detection signal 138 is High, the output of the 4-bit auxiliary register 58 passes through the OR gate 141, is sent to the gate switching circuit 61, and is transferred to the counting shift register 55 at the timing α. Thereafter, signals are transferred in the same loop for addition without carry. When the 1 minute signal is added and the time becomes 11:00 from 10:59, the 1 minute digit minute signal 9 sent from the counting shift register 55 and the AND gate 12
Flip-flop 144 by 1 sent from 1
is set (the flip-flop 144 is a flip-flop for storing bit and digit carries for carry during addition, and is delayed by 1 bit).One input of the EX-OR gate 122 is 1001.
(9), the other input is 0011(3), and the output is
1010, or 10. When this signal is transferred to the 4-bit auxiliary register 58, the carry detector 5
9's AND gate 125 (for 10 detection) goes high, and as mentioned above, since D ₁ is assigned to the minute digit, the output of the AND gate 126 becomes D ₁ , and the flip-flop 135 (delayed by 1 digit) Q output becomes _D2 . This inverted signal becomes the carry detection signal 138, and when the output of the 4-bit auxiliary register 58 passes through the OR gate 141, only the _D2 portion is cut off and transferred to the counting shift register 55, where it is converted to the minute digit at the timing of _D3. reach.
That is, at this time, the minute digit is 0. On the other hand, the Q output of flip-flop 135 becomes D ₂ and T ₁ at AND gate 152 and is sent to adder 57 . The signal sent to the adder 57 at the timing of _D2 is a 10-minute signal, which in this case is 0101(5). The circuit described above adds 5 and 1 to become 6, and the AND gate 127 of the carry detector 59
(for 6 detection) becomes High, and the _D3 part (10 minute digit) of the time signal transferred in the same way is set to 0, and the _D4 and _T1 signals are sent to the adder 57, and the time signal is also sent to the adder 57. The digits are incremented by 1, resulting in 10 o'clock to 11 o'clock. As a result, the counting shift registers 54 and 55 are
A time signal of 11:00 pm on January 31st will be stored. Furthermore, when a 1-minute signal is added at 11:59 p.m., it becomes 12:00 a.m. on February 1st in the same way, but the month digit is carried by the large month and small moon detector 56.
An AND gate for detecting a carry of the month digit of the carry detector 59 is set by the output 116 of the carry detector 59. When the 1-minute signal is added and it becomes 12:00 a.m., the day digit is carried up and becomes the 32nd. this
The 32nd is detected by AND gate 131, its output becomes High, and T ₂ is output from AND gate 146.
is output to set flip-flop 145 (which plays the same role as flip-flop 144). Q output 147 of flip-flop 145
The D ₄ T ₁ signal is generated, and the date digit is 1.
(Actually, due to the flip-flop 135
The inverted signal of _D5 is generated as a carry detection signal 138, and only the _D6 part of the time signal transferred from the 1 input 141a of the OR gate 141 is cut, and the above 1 is input from 141b, and finally, the The digit will be 1). Next, the 10th digit is AND gate 15
1 is added by 2, resulting in 4, and finally becomes 0 by AND gate 130. Furthermore, 1 is added to January to become February. The signals added in this way are sent to the AND gates 124 to 1 of the carry detector 59.
34 and is delayed by one digit or one bit by a flip-flop to make the contents of the counting shift registers 54 and 55 0 or 1. As a result, the α signals generated every minute are added, carried forward, and stored in the counting shift registers 54 and 55. On the other hand, the display shows EX where the output of the 4-bit auxiliary register 58 and the carry detection signal 138 are input in parallel.
-OR gate 139 and bit carrier EX
-OR139 output, digital carry signal 14
EX-OR149 and AND with 7 input in parallel
It becomes the time display signal 142 through the gate 151b and is transferred to the next decoder circuit (62 in FIG. 5). As described above, the display is performed at the timing of the β signal, which is delayed from the α signal. Next, a case will be described in which a time difference signal is generated due to touching the touch switch keyboard with a finger. As mentioned above, when you want to know the time in a certain country, by touching the corresponding touch button, a time difference signal (0 to 23 hours) is generated and a P signal is also generated. The time difference signal 108 is input to the AND gate 119 of the adder 57 at timing β or timing P. On the other hand, the contents stored in the counting shift registers 54 and 55 are input to the AND gate 118 of the adder 57 at the P timing when the P signal is generated. The time difference signal 108 is generated in synchronization with D ₂ or D ₂ +D ₄ , as described in the explanation with reference to FIG. That is, the counting shift register 54
and 55 hour digit D ₂ and 10 hour digit D ₄ . For example, if the current time is 8:30 pm on January 31st,
Assuming that the time difference signal 108 is a 3-hour BCD code, the two are added and the output of the EX-OR gate and 122 becomes a signal indicating January 31st at 11:30 p.m. As mentioned above, this addition is performed on digits higher than the hour digit, and since the minute digit and tenth minute digit are not related to the addition of the time difference signal, the minute digit and tenth minute digit are ,EX−
AND gate 151a from the output of OR gate 122
will be forwarded to. On the other hand, the time signal beyond the hour digit is transferred to the 4-bit auxiliary register 58, and when there is a carry, it is detected by the carry detection 59, the carry detection signal 138 is added by the adder 60, and the AND gate 1
51b. As a result, the time difference signal 108
is added to the current time, a time display signal 142 is generated, which is transferred to the next decoder circuit, and β
Display is performed at the timing of the signal or P signal. The time difference signal 108 is a 20 hour signal (in the touch switch detection circuit described above, 20 hours is 0001 1000).
BCD signal is generated), a carry to the day is performed. To explain this briefly, as mentioned above, the 10 minute digit is directly transferred to the AND gate 151a, but in the hour digit _D2 , when 8 hours are added to the current time of 8 o'clock, the flip-flop 144 is The data input becomes 1000(8), which is sent to the OR gate 152 and becomes the data input to the flip-flop 136 (+4 correction flip-flop delayed by one digit). This Q
The output becomes _D4 , the inverted signal _{of D4T4} becomes the carry detection signal 138, and the content of _D4 becomes 4. On the other hand, since the Q output of the flip-flop 136 becomes D ₄ , the AND gate 144 becomes D ₄ T ₁ , and since the D ₄ part of the time difference signal 108 is 0001 (1), EX-OR
The output of the gate 122 becomes 0010(2), and 2 is detected by the AND gate 130 of the carry detector 59,
_D5 becomes 0. Then, 1 is added to the day digit, and the signal 14 ends up being February 1st at 4:30 p.m.
2 will occur. The above is the time difference signal 10
8 occurs, the time difference signal 1
All additions of 08 are performed at the timing of the β signal or P signal. Since the timing of addition of the α signal at this time is different even if the time difference signal 108 is generated, the 1-minute signal is added independently and stored in the counting shift registers 54 and 55. The method described above is such that the counting shift registers 54 and 55 always add and store the reference anchorage time, and by adding thereto, the user knows the time in his/her desired country. Furthermore, in the above explanation, since the time difference signal is generated only when the touch button is touched, when the finger is released from the touch button, the time returns to the midway time. However, by storing the time difference signal in memory and causing it to occur continuously (as mentioned above, the memory can be operated by operating the crown attached to the side of the watch body). The time that is always displayed can be set at the user's discretion, for example, the time in the area where the user lives. Furthermore, when you want to know the time in another country, you can touch the touch button and the time in that country will be displayed, and when you release your finger from the touch button, you can automatically return to the time in your own region, making it extremely convenient. Finally, to briefly describe how to display the frame or arrow for displaying place names, input signals a to e of the encoder section of the touch switch detection circuit (Fig. 7) and the Q output of the flip-flop 105 are used, and the time difference signal is 0. ~11, the AND signal of the signals a to e and the output of flip-flop 105 is set to 0.
Enter it into the place name display register corresponding to ~11,
The frame or arrow for displaying the place name of the country (Midway to London) lights up or flashes. When the time difference signal is 12 to 23, the AND signal of the signals a to e and the Q output of the flip-flop 105 is input to the place name display register corresponding to the time difference signal 12 to 23, and the country (Paris, The frame or arrow for displaying place names (Rome to Auckland) is lit or flashing. The circuit of the embodiment shown in Figs. 1 and 2 has been described above in detail, but it is possible to know the time in various countries around the world with simple operations, and also to be able to control the time at any desired point. You can set and change the display. Furthermore, by partially changing the circuit described above, the embodiments shown in FIGS. 3 and 4 can also be implemented, so detailed description will be omitted here. Note that the present invention is not limited to the embodiments described herein, and various improvements and changes can be made without departing from the gist of the present invention. For example, using something other than a liquid crystal display for the display, changing the shape and structure of the input button switch (number of buttons, input method, etc.), changing the display format (day of the week, seconds, year, month, etc.). (addition of display, etc.) and various other changes are possible, but all of these belong to the present invention. As described above, the present invention aims to realize a world clock in a more advantageous manner as part of the multi-functionalization of digital display electronic wristwatches.The purpose of this invention is to display the time of the main region normally, and only display the time of another region when the button switch is operated. The display automatically returns to the original main region time after a certain period of time, and the user can change or reset the main region as necessary, making it easy to use. It was designed as a world clock that was easy to operate, and its industrial value is high.

[Brief explanation of the drawing]

1 to 4 are external views of a watch body showing an embodiment of the present invention. FIG. 5 is a circuit block diagram of the present invention. FIG. 6 is the timing pulse of the circuit of the present invention. FIG. 7 is a circuit diagram of the input section of the present invention, and FIG. 8 is a timing chart thereof. FIG. 9 is a part of the circuit diagram of the input section of the present invention. FIG. 10 is a circuit diagram of the clock section of the present invention. 1, 22, 31, 37...Clock body, 2, 23,
32, 58...display device, 3...time display section,
4, 24... Hour display section, 5, 25... Minute display section,
6, 26...Day display section, 7,27...AM, PM display section, 8,34,40...Place name display section, 9-2
0,29-30,35-36,41...touch button, 21,42...crown, 28,33,39...
...Arrow for place name display, 43...Standard oscillation circuit, 44
...Frequency divider circuit, 45...Sexagesimal counter, 47...
Timing pulse generation circuit, 49... touch switch keyboard, 50... touch switch detection circuit and time difference signal generation circuit, 52... clock section, 5
3, 61...gate switching circuit, 54, 55...
...Counting shift register, 56...Large moon, small moon detector, 57,60...Adder, 58,120
...4-bit auxiliary register, 59...carry detector, 62...decoder circuit, 63...display body.

Claims (1)

[Claims for Utility Model Registration] a. A frequency divider that divides the frequency of a signal from a standard oscillation circuit; and b. A time difference signal between the output of the frequency divider and the designated region to count the time in the designated region. In an electronic digital world clock consisting of a clock section, c. a display body that decodes and displays the output of the clock section, d. three or more switches each designating a specific region are arranged around the display body, and e. It consists of a detection circuit that detects the simultaneous operation input of two adjacent switches. The detection circuit outputs a set signal pulse with a set time width from the first operation signal when the operation input of each switch is input. a reset signal pulse generation circuit; g) a reset signal pulse generation circuit that inputs the operation signals of each of the switches and forms and outputs a reset signal pulse for simultaneous operation input of the two adjacent switches from the input signal; and h) the switch. a group of AND gates into which each of the operation signals and the set signal pulse are respectively input; a group of R-S flip-flops into which each output of the AND gate group and the reset signal pulse are input; and j a group of adjacent R-S flip-flops. Group 2
a first NOR gate group inputting two outputs, and a total output of the first NOR gate group and the R-S
a second NOR gate group that inputs the outputs of the respective flip-flop groups, and a time difference signal generation circuit that receives the outputs of the first and second NOR gate groups and outputs a time difference signal according to the output signal. m. The simultaneous operation input is outputted as the time difference signal from the first NOR gate and simultaneously outputted from the second NOR gate.
An electronic digital world clock characterized in that output from the NOR gate is prohibited and the time difference signal is input to the clock section as an output of the detection circuit.