JP2001166076A - Timing device and control method of timing device - Google Patents

Abstract

(57) [Summary] [Problem] To reduce the power consumption in the power save mode as much as possible and accurately return to the current time. When the operation mode is shifted from the display mode to the power saving mode, the hand movement is continued until the count value corresponding to the hand position indicating "12:00:00" is reached.
Thereafter, the power supply to all the circuits except the power generation detection circuit 91 is stopped by cutting off the connection between all the circuits except the power generation detection circuit 91 and the high-capacity secondary power supply 48. When switching from power saving mode to display mode,
While receiving the time data via the antenna 26,
Based on the received time data, the counter values of the second time counter 98 and the hour / minute time counter 99 are set to the current time, and the operation of returning to the current time is started.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a timekeeping device and a method for controlling the timekeeping device, and more particularly to a radio-controlled timepiece having a power saving function.

[0002]

2. Description of the Related Art There is a radio-controlled timepiece disclosed in Japanese Patent Application Laid-Open No. 11-223684 as a technique relating to a timepiece which has a power save function and receives time data from the outside to correct a displayed time. The timepiece described in this publication is a timepiece that is driven by electric power generated by a thermoelectric generator that converts heat energy of the arm on which the timepiece is worn into electric energy, and the time display is not displayed due to a drop in the voltage of the power storage device. In the case where it becomes accurate, the power supply function limits the power supply. Then, when the voltage of the power storage device is recovered by power generation, the display time is corrected based on the time data received from the outside, and the time display is continued.

[0003]

By the way, a power generator using a thermal power generator or a solar cell is very excellent in that heat energy or light energy around a user is converted into electric energy and used. However, there is a problem that the available energy density is low and constant energy cannot be obtained continuously. In addition, when rapid charging is performed, strong heat energy or light energy is required, and when the secondary battery is emptied, a long time is required for full charging. Further, in the case of the above-described radio-controlled timepiece, even when the mode shifts to the power save mode, at least power is supplied to the oscillation circuit, so that the power stored in the power storage device is wasted. There is a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and provides a timekeeping device and a control method thereof capable of minimizing power consumption during a power save mode and accurately returning to the current time. To provide.

[0005]

According to a first aspect of the present invention, there is provided a timepiece having time display means for displaying time, comprising: an oscillation circuit for generating a basic pulse; A portable state detecting means for detecting a portable state of the timekeeping device and outputting a portable state detection signal; and a power saving apparatus which is activated based on the portable state detection signal, and sets an operation mode of the time display means to stop the time display. A mode transition unit that transitions between a mode and a normal operation mode for performing the time display, a reception unit that receives time information from the outside, and when the operation mode transitions from the power saving mode to the normal operation mode, Current time return means for returning the time displayed by the time display means to the current time based on the time information. By stopping the operation of the oscillation circuit is characterized in that only the operating state the carried state detecting means.

According to a second aspect of the present invention, in the timekeeping device according to the first aspect, the mode transition means is configured to execute the operation mode when the non-portable state is detected based on the portable state detection signal. Is shifted from the normal operation mode to the power saving mode.

According to a third aspect of the present invention, in the timekeeping device according to the second aspect, the non-portable state is determined in advance by a state in which the timepiece is detected as non-portable based on the portable state detection signal. It is characterized in that it is a case where it has continued for a predetermined time or more.

According to a fourth aspect of the present invention, in the timekeeping device according to the first aspect, the time display means has an hour hand, a minute hand and a second hand, and the current time return means is used when returning to the current time. The operation of the hour hand, minute hand and second hand is returned at a high hand movement speed higher than the normal hand movement speed.

According to a fifth aspect of the present invention, in the timekeeping device according to the first aspect, the time display means has an hour hand, a minute hand and a second hand, and the mode shift means changes the operation mode to the normal operation mode. When shifting from the power saving mode to the power saving mode, the system waits until the hour hand, minute hand, and second hand reach a predetermined predetermined hand position, and then shifts to the power saving mode. Is returned to the current time on the basis of.

According to a sixth aspect of the present invention, in the timekeeping device according to the first aspect, the time display means has an hour hand, a minute hand and a second hand, and the timekeeping device is provided with a hand position of the hour hand, minute hand and second hand. Hand position counter means for counting a count value corresponding to the current time, and non-volatile memory means for storing the counter value when the operation mode shifts from the normal operation mode to the power saving mode, the current time The return unit is configured to return to the current time based on the counter value.

According to a seventh aspect of the invention, in the timekeeping device according to the first aspect, the time display means has an hour hand, a minute hand and a second hand, and the timekeeping device detects a current hand position. The present invention is characterized in that a detecting means is provided, and the current time return means is configured to return to the current time based on the current hand position.

According to an eighth aspect of the present invention, in the timekeeping device according to any one of the first to seventh aspects, a power generating means for converting external energy into electric energy to generate power, and a power generating means for generating power by the power generating means. Power storage means for storing the stored power, wherein the power storage means supplies power only to the portable state detection means in the power saving mode.

According to a ninth aspect of the present invention, in the timekeeping device according to the eighth aspect, the power generating means has at least a rotary weight and a rotor, and the power generating means is configured to rotate the rotor by a turning motion of the rotary weight. It is characterized by rotating to generate electricity.

According to a tenth aspect of the present invention, in the timing device according to the eighth aspect, the portable state detecting means detects a portable state based on a voltage generated by the power generating means.

According to an eleventh aspect of the present invention, in the timekeeping device according to the eighth aspect, there is provided a voltage detecting means for detecting a stored voltage stored in the power storing means, and the current time returning means is configured to switch the operation mode when the operation mode is changed. When shifting from the power saving mode to the normal operation mode, if the stored voltage detected by the voltage detecting means is lower than a predetermined voltage, a current time return operation for returning to the current time. Is not performed.

According to a twelfth aspect of the present invention, in the timekeeping device according to the eleventh aspect, the predetermined voltage is a voltage necessary for the current time return means to complete the return to the current time. It is characterized by.

According to a thirteenth aspect of the present invention, in the timing device according to the eleventh aspect, the receiving means detects the voltage by the voltage detecting means when the operation mode shifts from the power saving mode to the normal operation mode. When the stored storage voltage is lower than a predetermined voltage, the time information is not received.

According to a fourteenth aspect of the present invention, in the timekeeping device according to the eleventh aspect, when the operation mode shifts from the power saving mode to the normal operation mode, the storage voltage detected by the voltage detection means is changed to the normal operation mode. When the voltage is lower than a predetermined voltage, a notifying unit for notifying that the time cannot be restored is provided.

According to a fifteenth aspect of the present invention, in the timekeeping device according to the fourteenth aspect, the notification means has a hand movement interval changing means for changing a hand movement interval of the time display means.
The hand movement interval changing means changes the hand movement interval of the time display means at the time of the notification.

According to a sixteenth aspect of the present invention, there is provided a method for controlling a clock device provided with a time display device for displaying time.
An oscillating step of generating a basic pulse, a portable state detecting step of detecting a portable state of the timing device and outputting a portable state detection signal, and being started based on the portable state detection signal, and A mode transition step of transitioning an operation mode between a power saving mode for stopping the time display and a normal operation mode for performing the time display, a reception step of receiving time information from the outside, and the operation mode from the power saving mode. When shifting to the normal operation mode, based on the time information, a current time return step of returning the time displayed by the time display device to the current time, and, in the power saving mode, The operation in the oscillation step is stopped, and only the portable state detection step is set to the operation state.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [1] First Embodiment [1.1] Configuration of First Embodiment A first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of a timing device according to the first embodiment. The timekeeping device 1 is a wristwatch, and the user uses the belt connected to the device body by wrapping it around a wrist. The timekeeping device 1 of this example is roughly classified into a power generation unit A that generates AC power, a power supply unit B that rectifies the AC voltage from the power generation unit A, stores the boosted voltage, and supplies power to each component. A control unit C that detects the power generation state of the power generation unit A and controls the entire apparatus based on the detection result; a hand movement mechanism E that drives hands using the hour / minute motor 60 and the second motor 10; A driving unit D that drives the hand movement mechanism E based on the control signal;
Further, it is provided with a receiving unit F for receiving a radio wave from the outside. Hereinafter, each component will be described.

[1.1.1] Configuration of Power Generation Unit First, the power generation unit A includes a power generation device 40, a rotary weight 45, and a speed increasing gear 46. As the power generation device 40, the power generation coil 4 in which the power generation rotor 43 rotates inside the power generation stator 42 and is connected to the power generation stator 42.
An electromagnetic induction type AC power generation device capable of outputting the electric power induced in 4 to the outside is employed.

The rotary weight 45 functions as a means for transmitting kinetic energy to the power generation rotor 43. The movement of the rotary weight 45 is transmitted to the power generation rotor 43 via the speed increasing gear 46. In the wristwatch-type timing device 1, the rotary weight 45 can turn inside the device by capturing the movement of the user's arm or the like. Therefore, power generation is performed using energy related to the life of the user, and the timer 1 can be driven using the generated power.

[1.1.2] Configuration of Power Supply Unit Next, the power supply unit B includes a rectifier circuit 47, a high-capacity secondary power supply 4
8 and a step-up / step-down circuit 49.
The step-up / step-down circuit 49 is capable of performing multi-step boosting and stepping-down using a plurality of capacitors 49a, 49b, and 49c, and adjusts a voltage supplied to the drive unit D by a control signal φ11 from the control unit C. be able to. The output voltage of the step-up / step-down circuit 49 is also supplied to the control unit C by the monitor signal φ12, and the output voltage is monitored. Here, the power supply section B takes Vdd (high voltage side) as a reference potential (GND) and generates Vss (low voltage side) as a power supply voltage.

[1.1.3] Configuration of Hand Movement Mechanism Next, the hand movement mechanism E includes a second motor 10 for driving the second hand 55 and an hour / minute motor 60 for driving the minute hand 76 and the hour hand 77. It is provided with. The hour / minute motor 60 and the second motor 10 used in the hand movement mechanism E
Is a motor driven by a pulse signal, which is also called a pulse motor, a stepping motor, a stepping motor, a digital motor, or the like, and is often used as an actuator of a digital control device. 2. Description of the Related Art In recent years, small and lightweight stepping motors have been widely used as actuators for small electronic devices or information devices suitable for carrying. A typical example of such an electronic device is a clock device such as an electronic timepiece, a time switch, or a chronograph.

The hour / minute motor 60 and the second motor 10 of this embodiment
Are driven coils 61 and 11 that generate a magnetic force by a drive pulse supplied from the drive unit D, stators 62 and 12 that are excited by the drive coils 61 and 11, and are further excited inside the stators 62 and 12. Rotors 63 and 13 rotated by a rotating magnetic field
It is provided with.

The rotation of the rotor 63 of the hour / minute motor 60 comprises a fourth wheel 71, a third wheel 72, a second wheel 73, a minute wheel 74 and an hour wheel 75 meshed with the rotor 63 via a pinion. The time is transmitted to the hour hand and the minute hand by the hour / minute train wheel 70.
A minute hand 76 is connected to the second wheel & pinion 73, and an hour hand 77 is connected to the hour wheel 75.

The rotation of the rotor 13 of the second motor 10 is performed by rotating the second intermediate wheel 51 and the second wheel 5 meshed with the rotor 13 through the pinion.
It is transmitted to the second hand by the second wheel train 50 composed of two. A second hand 55 is connected to the shaft of the second wheel 52. The time is displayed by these hands in conjunction with the rotation of the rotors 63 and 13.

[1.1.4] Configuration of Driving Unit Next, the driving unit D controls the hour and minute motor 60 under the control of the control unit C.
And various drive pulses to the second motor 10. The driving unit D includes a second driving circuit 30S and an hour / minute driving circuit 30H.
M.

[1.1.5] Configuration of Receiving Unit Next, the receiving unit F receives the long-wave standard radio wave (JJY; 40 kHz in Japan) on which the time data is superimposed by the ferrite antenna 26. The receiving circuit 25 is configured to output the received long-wave standard radio wave as time data, and a storage circuit (not shown) that stores the time data output by the receiving circuit 25.

The detailed configuration of the receiving circuit 25 will be described with reference to FIG. The receiving circuit 25 amplifies the long-wave standard radio signal received by the ferrite antenna 26, a band-pass filter 57 that extracts only a desired frequency component from the amplified long-wave standard radio signal, and smoothes the long-wave standard radio signal. AGC (Au) for controlling the gain of the demodulation circuit 58 and the amplification circuit 56 for demodulation and controlling the reception level of the long-wave standard radio signal to be constant.
and a decoding circuit 59 for decoding and outputting the demodulated long-wave standard radio signal.
It is comprised including. The power save mode signal is supplied from the control circuit 14 and controls the operation mode of the receiving circuit 25. During normal non-reception, the receiving circuit 25 is in a power saving state and consumes little power. On the other hand, at the time of reception, the receiving circuit 25 is released from the power save state, becomes active, and performs a data receiving operation.

Here, referring to FIG. 13 and FIG.
The contents of the longwave standard radio signal on which the time data is superimposed will be described. First, the time code format of the long wave standard radio signal shown in FIG. 13 is configured such that one signal is transmitted every second and one record is obtained in 60 seconds. There are three types of signals transmitted as long-wave standard radio signals in total, and a signal representing "1", "0" or "P" is transmitted. The types of these signals are determined based on the amplitude modulation time of each signal shown in FIG. FIG. 14A shows that the signal type is “1”.
The amplitude of the signal continues for 0.5 seconds from the rise of the signal, and it is determined that the type of the signal is “1”. FIG. 14B shows a signal waveform in which the type of the signal is “0”. When the amplitude continues for 0.8 seconds from the rise of the signal, the signal is determined to be the “0” signal. FIG. 14C shows a signal waveform in which the type of the signal is “P”. If the amplitude continues for 0.2 seconds from the rise of the signal, the signal is determined to be the “P” signal.

As shown in FIG. 13, the time code format of the long-wave standard radio signal includes items such as the minute 9a and hour 9b of the current time and the total date 9c from January 1 of the current year. Have been. In addition, an item in which “N” is written on the time code format of the long-wave standard radio signal is “ON” when a signal representing “1” is transmitted, and is associated with the item. Are subject to addition when calculating hours, minutes, etc., while
If a signal other than “1” is transmitted, “OF”
F "state, indicating that the numerical value associated with the item is excluded from the addition when calculating the hour and minute. Specifically, for example, 8 corresponding to minute 9a
In a second, the long wave standard radio signal is “1, 0, 1, 0, 0, 1,
The transmission of “1, 1” indicates that the current time is “40 + 10 + 4 + 2 + 1 = 57” minutes, and “P” and “0” are shown in the time code format of the long wave standard radio signal. "" Is a fixed item and is used to synchronize the long-wave standard radio signal with the time code format. When "P" is transmitted twice consecutively, the second Is "0
Indicates that the time is 0 "seconds, that is, the minute is switched to the next minute. The long wave standard radio wave is based on the cesium atomic clock. Therefore, the time is corrected by receiving the long wave standard radio wave A radio controlled timepiece can achieve very high accuracy with an error of one second per 100,000 years.

[1.1.6] Configuration of Control Unit The configuration of the control unit C will be described below with reference to FIG.
FIG. 2 is a functional block diagram of the control unit C of the timekeeping device 1 according to the first embodiment and its peripheral configuration. The control unit C includes a pulse synthesis circuit 22, a power generation detection circuit 91, a high-capacity secondary power supply 4
8 based on the output signals of the charging voltage detection circuit 92, the mode control circuit 96, the second counter circuit 94, the hour / minute counter circuit 95, and the mode control circuit 96 for detecting the charging voltage of A time data control circuit 93 for controlling and a drive control circuit 24 are provided.

[1.1.6.1] Configuration of Pulse Synthesizing Circuit First, the pulse synthesizing circuit 22 will be described. The pulse synthesizing circuit 22 oscillates a reference pulse having a stable frequency using the reference oscillation source 21 such as a quartz oscillator, and synthesizes a frequency-divided pulse obtained by dividing the reference pulse and the reference pulse. It has a combining circuit that generates pulse signals with different pulse widths and timings.

[1.1.6.2] Configuration of power generation detection circuit The detailed configuration of the power generation detection circuit 91 will be described with reference to FIG. The power generation detection circuit 91 shown in FIG. 5 includes two P-channel transistors 36 and 37, a capacitor 38 having drain terminals of the P-channel transistors 36 and 37 connected to a terminal on the current draw side, and a capacitor 38 connected in parallel. A resistor 39 which is connected and has a high resistance used for discharging the electric charge of the capacitor 38, an inverter 78 having drain terminals of the P-channel transistors 36 and 37 connected to inputs, and an inverter 78 connected in series to the inverter 78 Inverter 79 and pull-up resistor 27,
28. P-channel transistor 3
The terminal voltages at both ends of the power generation coil 26 in FIG. 1 are applied to the gate terminals 6 and 37, and the high potential side voltage Vdd is applied to each source terminal. The low potential side voltage Vss is applied to the other terminals of the capacitor 38 and the resistor 39. The output signal of the inverter 79 is a power generation detection signal.
Here, the low potential side voltage Vss is equal to the high potential side voltage Vdd.
(= GND) as a reference, and indicates a potential difference from the high potential side voltage Vdd. The resistance 3
9 is a high resistance of several tens M to several G ohms.

In the above configuration, when an electromotive voltage is generated in the power generator 40, the P-channel transistors 36 and 37 are turned on alternately, and a voltage is generated between the terminals of the capacitor 38, and the input to the inverter 78 is generated. Is at "H" level, the power generation detection signal output from inverter 79 is at "H" level. On the other hand, when no electromotive voltage is generated in the power generation device 40, the P-channel transistor 3
Since the capacitors 6 and 37 remain in the "OFF" state, the electric charge of the capacitor 38 is discharged by the resistor 39, the voltage between the terminals of the capacitor 38 decreases, and the input to the inverter 78 becomes "L" level. , The power generation detection signal output from the inverter 79 becomes “L” level. here,
Since the power generation detection circuit 91 is provided with the pull-up resistors 27 and 28, when the electromotive voltage is not generated in the power generation device 40, the P-channel transistor 36 is surely not affected by the residual magnetic field or the like. , 37 is “OFF”
State. Therefore, the power generation detection circuit 9
1, the current consumption can be suppressed to zero, and the energy consumption of the high-capacity secondary power supply 48 can be reduced.

[1.1.6.3] Configuration of Mode Control Circuit Next, the mode control circuit 96 controls the operation mode of the time display according to the power generation state, and the power generation detection circuit 91.
And a non-power generation time measuring circuit 84 for measuring a non-power generation time Tn during which power generation is not detected. The mode control circuit 96 stores the set mode, and supplies the information to the drive control circuit 24 and the time data control circuit 93. When switching from the display mode to the power saving mode, the drive control circuit 24 stops supplying the pulse signals to the drive circuits 30HM and 30S, and stops the operations of the drive circuits 30HM and 30S. As a result, the hour / minute motor 60 and the second motor 10 stop driving, the hour / minute hand and the second hand enter the non-drive state, and the time display stops.

The non-power generation time measuring circuit 84 calculates the non-power generation time T
When n exceeds a predetermined time, the display mode shifts to the power saving mode. On the other hand, in the transition from the power saving mode to the display mode, the power generation detection circuit 91 detects that the power generation device 40 is in the power generation state, and the charging voltage detection circuit 92 reduces the charging voltage of the high-capacity secondary power supply 48. It is executed when it is detected that it is sufficient. Here, the operation mode includes a display mode and a power saving mode. The display mode operates the original function of the machine. In the case of the timekeeping device 1 in the present embodiment, the display mode is an operation in which the time display is continued. The power-saving mode stores the state before switching to the power-saving mode or stores progress information of the power-saving mode.When the mode is switched to the display mode, the stored information at the time of the power-saving mode is reflected. In the case of the timekeeping device 1 according to the present embodiment, the operation is to stop the time display and the like and count the elapsed time and the like required for the return.

[1.1.6.4] Configuration of Second Counter Circuit Next, the second counter circuit 94 includes a second position counter 82, a second time counter 98, and a second coincidence detection circuit 85. . The second position counter 82 is a counter that loops in 60 seconds. For example, in the case of an analog clock,
When shifting from the display mode to the power saving mode, the hand is moved until the second hand position counter 82 becomes “00” (corresponding to, for example, the position of 00 seconds), and the second position counter 82 becomes “00”.
At this point, the time display operation is stopped and the mode shifts to the power saving mode. This is because it is not possible to determine where the hand is currently located inside the watch.
The position of the hand when returning from the display mode is relatively determined with reference to the position of the hand when is "00". The second time counter 98 is a counter that loops in 60 seconds, and sets a counter value based on the time data received by the receiving circuit 25 when switching from the power saving mode to the display mode. This eliminates the need to count the duration of the power saving mode. When switching from the power saving mode to the display mode, the second counter circuit 94 uses the second position counter 82 to count the fast-forward pulse supplied from the drive control circuit 24 to the second drive circuit 30S.
When the count value of the second position counter 82 matches the count value of the second time counter 98, the second coincidence detection circuit 85 generates a control signal for stopping the transmission of the fast-forward pulse, and sends the control signal to the second drive circuit 30S. Supply.

[1.1.6.5] Configuration of the hour / minute counter circuit Next, the hour / minute counter circuit 95 includes the hour / minute position counter 8.
6, an hour / minute time counter 97 and an hour / minute coincidence detecting circuit 87. Hour and minute position counter 86
Is a counter that loops in 24 hours. For example, in the case of an analog clock, when shifting from the display mode to the power saving mode, the hour / minute hand position counter 86 is set to “00:00” or “12:00” (for example, 12 Hour) and the hour / minute position counter 86 reads “00: 0”.
When the time reaches 0 ”or“ 12:00 ”, the time display operation is stopped and the mode shifts to the power saving mode, because it is impossible to determine where the hand is currently located inside the watch, and The position of the hand when returning from the display mode is relatively determined based on the position of the hand when the counter 86 is "00:00" or "12:00". , A counter that loops for 24 hours, and when the mode is switched from the power saving mode to the display mode, the counter value is set based on the time data received by the receiving circuit 25. Accordingly, it is necessary to count the duration of the power saving mode. When the mode is switched from the power saving mode to the display mode, the hour / minute counter circuit 95 uses the hour / minute position counter 86 to drive the hour / minute counter from the drive control circuit 24. Counting fast-forward pulses supplied to the road 30HM. The hour coincidence detection circuit 87,
When the count value of the hour / minute position counter 86 matches the count value of the hour / minute time counter 97, a control signal for stopping the transmission of the fast-forward pulse is generated and supplied to the hour / minute drive circuit 30HM.

[1.1.6.6] Configuration of Drive Control Circuit Next, the drive control circuit 24 generates a drive pulse signal corresponding to the mode based on various pulse signals output from the pulse synthesis circuit 22. Generate. First, in the power saving mode, the supply of the driving pulse signal is stopped. Next, immediately after switching from the power saving mode to the display mode, in order to return the redisplayed time display to the current time, the driving circuits 30HM and 30S use a fast-forward pulse with a short pulse interval as a driving pulse signal. To supply. Then, after the supply of the fast-forward pulse is completed, drive pulse signals having normal pulse intervals are supplied to the drive circuits 30HM and 30S.

[1.1.7] Circuit configuration for interrupting power supply Next, in order to minimize the current consumption from the high-capacity secondary power supply 48 during the power saving mode, the high-capacity secondary power supply 48 is used. FIG. 11 shows a circuit configuration for interrupting the supply of the power supply voltage.
The circuit configuration shown in FIG. 11 includes, in addition to the circuit configuration of the timekeeping device 1 described above, a constant voltage generation circuit 112 that receives the low potential side voltage Vss as an input voltage and outputs a stabilized constant voltage Vreg, and a constant voltage Vreg. A constant voltage driving circuit 111 (for example, an oscillation circuit, a frequency dividing circuit, or the like) that generates a clock signal or the like, a latch circuit 113 provided between the high-capacity secondary power supply 48 and the control circuit 23, and a latch circuit 113
, And a p-channel transistor 114 connected to the intersection of the high-side voltage Vdd line and the output side.

The latch circuit 113 receives a set pin (S) for inputting a power saving mode signal transmitted from the control circuit 23 indicating that the power saving mode has been entered, and detects that the power generation state transmitted from the power generation detection circuit 91 has been detected. It has a reset pin (R) for inputting the indicated power generation state detection signal and an output pin (Q) for outputting an output signal for each input signal. Note that the high-potential-side voltage Vdd is set to the reference potential (GND)
In this case, the low potential side voltage Vss becomes the power supply voltage, and this potential difference becomes the charging voltage Vc.

In the above configuration, when the operation mode is shifted from the display mode to the power saving mode, the control circuit 2
3 transmits a power saving mode signal to the set pin of the latch circuit 113, and the output pin of the latch circuit 113 outputs
An “H” level signal is output, and p-channel transistor 114 is turned “OFF”. Thereby, the control circuit 23, the voltage detection circuit 92, and the constant voltage detection circuit 112
The supply of the charging voltage Vc from the high-capacity secondary power supply 48 is stopped for the same, and the supply of the constant voltage Vreg to the constant voltage drive circuit 111 is stopped.

In the power saving mode, the driving section D is stopped, and most of the current consumption of the circuit is controlled by a constant voltage driving circuit 111 such as an oscillation circuit for generating a reference pulse signal and a frequency dividing circuit and a constant voltage generating circuit 112. As described above, the supply of the constant voltage Vreg to the constant voltage driving circuit 111 is stopped as described above, so that the current consumption in the constant voltage driving circuit 111 can be reduced to zero. By stopping the supply of the power supply voltage Vss, the current consumption of the entire circuit can be reduced to almost zero.

When a power generation state detection signal is sent from the power generation detection circuit 91 to the reset pin of the latch circuit 113 during the power saving mode, an “L” level signal is output from the output pin of the latch circuit 113. , P-channel transistor 114 is turned on. Therefore, during the display mode, the charging voltage Vc of the high-capacity secondary power supply 48 is supplied to the control circuit 23, the voltage detection circuit 92, the constant voltage detection circuit 112, and the like.
The constant voltage Vreg is supplied.

When the supply of the charging voltage Vc is stopped by turning off the p-channel transistor 114, the output of the latch circuit 113 becomes unstable. For this reason, the p-channel transistor 114 is reliably set to “OF”.
In order to set the state to F ″, the p-channel transistor 114 is used.
It is desirable to connect a pull-up resistor having a high resistance value to the gate terminal side of.

[1.2] Operation of First Embodiment Next, referring to the operation flowchart shown in FIG.
The operation of the first embodiment will be described. First, the time data control circuit 93 determines whether or not the operation mode currently set in the mode control circuit 96 is the power saving mode (step S1). In the determination of step S1, if the operation mode currently set in the mode control circuit 96 is the power saving mode (step S1; Y
es) Then, the process proceeds to step S5.

On the other hand, when the operation mode currently set in the mode control circuit 96 is the display mode (step S1; No), the power generation detection circuit 91 determines the power generation amount of the power generation device 40 in step S1. It is detected and it is determined whether or not it is in the power generation state (step S2). In the determination of step S2, the power generation detection circuit 91 determines
When it is determined that the power generation device 40 is in the power generation state (Step S2; Yes), the process proceeds to Step S14.

On the other hand, when the power generation detection circuit 91 determines that the power generation device 40 is in the non-power generation state (step S2; No), the non-power generation time measurement circuit 84 sets the non-power generation time The count value for counting time is increased (step S3). Next, the mode control circuit 96 determines whether or not the count value counted by the non-power generation time measurement circuit 84 exceeds a value corresponding to a predetermined non-power generation time (step S4). . In the determination of step S4, when the mode control circuit 96 determines that the count value counted by the non-power generation time measurement circuit 84 does not exceed a value corresponding to a predetermined non-power generation time. Is (Step S4; No), the processing is performed at Step S
Move to 2.

On the other hand, in the determination of step S4, the mode control circuit 96 determines that the count value counted by the non-power generation time measuring circuit 84 exceeds a value corresponding to a predetermined non-power generation time. If it is determined (step S4; Yes), the mode control circuit 9
6 shifts the operation mode from the display mode to the power saving mode, and transmits a power saving mode signal indicating that the operation mode is the power saving mode to the time data control circuit 93 (step S5).

When the time data control circuit 93 receives the power saving mode signal, the count value of the hour / minute position counter 86 and the second position counter 82 is, for example, “12:00:00”.
The hand movement is continued until the count value corresponding to the hand position indicating "second" is reached (step S6).
3 is an hour / minute position counter 86 and a second position counter 82
Is determined to be a count value corresponding to the hand position indicating "12:00:00" (step S7). In the determination of step S7, the count values of the hour / minute position counter 86 and the second position counter 82 are set to “12:00:00” by the time data control circuit 93.
If it is determined that the count value does not correspond to the hand position indicating "second" (step S7; No), the process proceeds to step S6.

On the other hand, in the determination in step S7, the count values of the hour / minute position counter 86 and the second position counter 82 are set to "12:00" by the time data control circuit 93.
If it is determined that the count value corresponds to the hand position indicating "minute 00 second" (step S7; Yes), the supply of the high-capacity secondary power supply 48 is interrupted by the above-described method.
The circuit between all circuits except the power generation detection circuit 91 and the high-capacity secondary power supply 48 is cut off, and the supply of power to all circuits except the power generation detection circuit 91 is stopped (step S8).

Next, the power generation detection circuit 91 is connected to the power generation device 40.
The power generation amount is detected, and it is determined whether the power generation state is established (step S9). If the power generation detection circuit 91 determines that the power generation device 40 is in the non-power generation state in step S9 (step S9; No), the process proceeds to step S9. On the other hand, in the determination of step S9, when the power generation detection circuit 91 determines that the power generation device 40 is in the power generation state (step S9;
Yes), the charging voltage detection circuit 92 outputs the system drive voltage Vss and the lower limit voltage VL that enables the return operation to the current time.
Then, it is determined whether or not the system drive voltage Vss exceeds the lower limit voltage VL necessary for normally completing the return operation to the current time (step S11). In the determination of step S11, when the charging voltage detection circuit 92 determines that the system drive voltage Vss does not exceed the lower limit voltage VL necessary for normally completing the return operation to the current time (step S11). No), for example, irregular hand movement such as two-second hand movement is performed to indicate to the user that the system drive voltage Vss is insufficient (step S15), and the process proceeds to step S11. This is because if the system drive voltage Vss is lower than the lower limit voltage VL, the return to the current time cannot be completed and the wrong time may be displayed. The user is prompted to charge.

On the other hand, in the determination of step S11, the charging voltage detecting circuit 92 detects the system driving voltage Vss.
Is determined to have exceeded the lower limit voltage VL necessary to normally complete the return operation to the current time (step S11; Yes), the receiving circuit 25 transmits the time data via the antenna 26. At the same time, the time data is transmitted to the time data control circuit 93 (step S12).
The time data control circuit 93 that has received the time data sets the counter values of the second time counter 98 and the hour / minute time counter 99 to the current time based on the received time data, and starts the operation of returning to the current time ( Step S1
3).

More specifically, the second counter circuit 94
Counts the fast-forward pulse supplied from the drive control circuit 24 to the second drive circuit 30S using the second position counter 82. Then, when the count value of the second position counter 82 matches the count value of the second time counter 98, the second coincidence detection circuit 85 generates a control signal for stopping the transmission of the fast-forward pulse. By supplying the current to the circuit 30S, the second hand returns to the current time. The hour / minute counter circuit 95 counts the fast-forward pulse supplied from the drive control circuit 24 to the hour / minute drive circuit 30HM using the hour / minute position counter 86. When the count value of the hour / minute position counter 86 matches the count value of the hour / minute time counter 99, the hour / minute match detection circuit 87 generates a control signal for stopping the transmission of the fast-forward pulse. Is supplied to the hour / minute drive circuit 30HM to return the hour / minute hands to the current time. Such a current time return operation may be started from either the second hand or the hour / minute hand, or may be started simultaneously. Then, after returning to the current time, the normal hand movement is performed, and the display of the current time is continued as the display mode (step S14).

[1.3] Modification of First Embodiment In the above-described first embodiment, when shifting to the power saving mode, the hand movement is continued until the hand position indicates "12:00:00". But "12:00:00"
However, the time is not limited to this, and may be another time. In short, the currently-pointed hand position corresponds to the count value of the second position counter 82 and the hour / minute position counter 86, and the second position counter 82 and the hour / minute position counter 86
If the needle position is set correctly by changing the count value of "1", it is not necessary to limit to "12:00:00".

[1.4] Effects of the First Embodiment As described above, according to the first embodiment, when shifting to the power saving mode, the count values of the hour / minute position counter 86 and the second position counter 82 are used. But "12:00:00"
The hand movement is continued until the count value corresponding to the hand position indicating the hand position is reached, and when shifting to the display mode, the hand position is set to the current time based on the fact that the hand position indicates "12:00:00". Since the return operation is performed, the time display can be returned to the correct time. After the mode shifts to the power saving mode and the hand position indicates "12:00:00", the power supply from the high-capacity secondary power supply 48 is cut off to eliminate current consumption except for the power generation detection circuit 91. This makes it possible to reduce the energy consumption of the high-capacity secondary power supply 48 as much as possible.

[2] Second Embodiment [2.1] Configuration of Second Embodiment FIG. 6 is a functional block diagram of a control unit C ′ of a timekeeping device 2 according to a second embodiment and its peripheral configuration. The timing device 2
The control unit C ′ has the same configuration as the timing device 1 according to the first embodiment shown in FIGS. 1 and 2 except that a nonvolatile memory unit 88 is newly used. The non-volatile memory section 88 is an electrically erasable and non-volatile EEPROM (Electrically Erasable and Prism).
(Read Only Memory), a sense amplifier for reading, and a booster circuit for writing. When shifting from the display mode to the power saving mode, the nonvolatile memory unit 88 stores the counter values of the second position counter 82 and the hour / minute position counter 86 at the time of the shift in the nonvolatile memory. Thus, when shifting to the power saving mode, the hand operation can be stopped immediately after storing the respective counter values of the second position counter 82 and the hour / minute position counter 86 corresponding to the hand position at the time of shifting. Energy consumption can be further reduced.

[2.2] Operation of the Second Embodiment The operation of the second embodiment is different from the operation of the first embodiment in that, in the first embodiment, the hand position is changed when the mode shifts to the power saving mode. Until it indicates "12: 00: 00: 00"
While the power supply was stopped after the continuation of the hand operation, when shifting to the power saving mode, the counter values of the second position counter 82 and the hour / minute position counter 86 corresponding to the hand position at the time of the shift are stored in a nonvolatile manner. In the first embodiment, the hand position is set to “12:00” when the supply of power is stopped after being stored in the dynamic memory unit 88 and when returning to the current time in the first embodiment.
While the return operation is performed based on the indication of “minute 00 second”, when returning to the current time, the hand position corresponds to the position corresponding to the counter value stored in the nonvolatile memory 88. Is that the return operation is performed on the basis of the above.

Next, the operation of the second embodiment will be described with reference to the operation flowchart shown in FIG. First, the time data control circuit 93 determines whether or not the operation mode currently set in the mode control circuit 96 is the power saving mode (step S21). Step S2
If it is determined in step 1 that the operation mode currently set in the mode control circuit 96 is the power saving mode (step S21; Yes), the process proceeds to step S25. On the other hand, when the operation mode currently set in the mode control circuit 96 is the display mode in the determination in step S21 (step S21; No), the power generation detection circuit 91 detects the power generation amount of the power generation device 40, It is determined whether or not it is in the power generation state (step S22). When the power generation detection circuit 91 determines that the power generation device 40 is in the power generation state (step S22; Yes), the process proceeds to step S34. On the other hand, when the power generation detection circuit 91 determines that the power generation device 40 is in the non-power generation state in the determination of step S22 (step S22; No),
The non-power generation time measurement circuit 84 increases the count value for counting the non-power generation time (step S23). Next, the mode control circuit 96 determines whether or not the count value counted by the non-power generation time measurement circuit 84 exceeds a value corresponding to a predetermined non-power generation time (step S24). . When the mode control circuit 96 determines in step S24 that the count value counted by the non-power generation time measurement circuit 84 does not exceed a value corresponding to a predetermined non-power generation time, (Step S24; No), the process proceeds to Step S22. On the other hand, step S24
When the mode control circuit 96 determines that the count value counted by the non-power generation time measurement circuit 84 exceeds the value corresponding to the predetermined non-power generation time, Step S24; Ye
s) The mode control circuit 96 shifts the operation mode from the display mode to the power saving mode, and transmits a power saving mode signal indicating that the operation mode is the power saving mode to the time data control circuit 93 (step S25). ).

The time data control circuit 93 having received the power saving mode signal sends the count values of the hour / minute position counter 86 and the second position counter 82 to the non-volatile memory unit 88 for the hour / minute counter circuit 95 and the second counter circuit 94. A control signal for writing is transmitted, and the hour / minute position counter 8
6 and the count value of the second position counter 82 are stored in the nonvolatile memory unit 88 (step S26). Accordingly, the hand operation can be stopped immediately after the respective counter values of the second position counter 82 and the hour / minute position counter 86 corresponding to the hand positions at the time of shifting to the power saving mode are stored in the nonvolatile memory unit 88. As in the first embodiment, it is not necessary to continue the hand movement until the hand position indicates "12:00:00", and it is possible to further reduce energy consumption.

Then, all the circuits except the power generation detection circuit 91 are cut off from the high-capacity secondary power supply 48, and the supply of power to all the circuits except the power generation detection circuit 91 is stopped (step S27). . Next, the power generation detection circuit 91 detects the amount of power generated by the power generation device 40 and determines whether or not the power generation device is in a power generation state (step S28). In the determination of step S28, when the power generation detection circuit 91 determines that the power generation device 40 is in the non-power generation state (step S2).
8; No), the process proceeds to step S28. on the other hand,
In the determination of step S28, when the power generation detection circuit 91 determines that the power generation device 40 is in the power generation state (step S28; Yes), the charging voltage detection circuit 9
2 is a comparison between the system drive voltage Vss and the lower limit voltage VL at which the return operation to the current time is possible, and the lower limit voltage VL required for the system drive voltage Vss to normally complete the return operation to the current time. Is determined (step S30). In the determination of step S30, when the charging voltage detection circuit 92 determines that the system drive voltage Vss does not exceed the lower limit voltage VL necessary to normally complete the return operation to the current time (step S30). No), for example, irregular hand movement such as two-second hand movement is performed to indicate to the user that the system drive voltage Vss is insufficient (step S35), and the process proceeds to step S30. On the other hand, in the determination of step S30, when the charging voltage detection circuit 92 determines that the system drive voltage Vss exceeds the lower limit voltage VL necessary for normally completing the operation of returning to the current time, ( Step S30; Yes), the receiving circuit 25 receives the time data via the antenna 26 and transmits the time data to the time data control circuit 93 (Step S30).
31). Time data control circuit 93 that has received the time data
Is a second time counter 9 based on the received time data.
8 and the counter values of the hour / minute time counter 99 are set to the current time.

Then, the second counter circuit 94 and the hour / minute counter circuit 95 store the counter values of the hour / minute position counter 86 and the second position counter 82 corresponding to the hand positions at the time of shifting to the power saving mode stored in the non-volatile memory section 88. Is read out, and the second position counter 82 and the hour / minute position counter 8 are read.
6 (step S32). by this,
The hand position before starting the return operation to the current time is associated with the count values of the hour / minute position counter 86 and the second position counter 82. Then, by adjusting the respective count values to the respective counter values of the second time counter 98 and the hour / minute time counter 99, each hand position indicates the current time.

Next, the returning operation of the second hand and the hour / minute hand to the current time is performed (step S33). Then, after returning to the current time, normal hand movement is performed, and the display of the current time is continued as the display mode (step S34).

[2.3] Effect of Second Embodiment As described above, according to the second embodiment, when shifting to the power saving mode, the second position counter corresponding to the hand position at the time of shifting to the power saving mode. 82 and the hour / minute position counter 86 are stored in the non-volatile memory unit 88, and when the display mode is entered, the counter value stored in the non-volatile memory unit 88 is read and the second position is read. Since the counter 82 and the hour / minute position counter 86 are reset and the return operation to the current time is performed based on the reset count value, the time display can be returned to the correct time. Also, when shifting to the power saving mode,
Second position counter 8 corresponding to the hand position when shifting to the power saving mode
Since the hand operation can be stopped immediately after the counter values of the 2 and hour / minute position counter 86 are stored in the non-volatile memory unit 88, energy consumption can be further reduced. Further, after shifting to the power saving mode, the supply of power from the high-capacity secondary power supply 48 is cut off to eliminate current consumption other than the power generation detection circuit 91, thereby minimizing the energy consumption of the high-capacity secondary power supply 48. It becomes possible.

[3] Third Embodiment [3.1] Configuration of Third Embodiment FIG. 8 shows a hand movement mechanism E ′ of a timekeeping device 3 according to a third embodiment.
FIG. 2 is a diagram showing a configuration example of a needle position detecting element provided in the device. FIG. 8 shows a configuration example in which the hour hand, the minute hand, and the second hand are driven by one pointer driving motor in order to easily understand the configuration of the hand position detecting element.
The timekeeping device 3 is different from the first embodiment shown in FIGS. 1 and 2 in that a second hand detection element KS, a minute hand detection element KM, and an hour hand detection element KH are newly used in the hand movement mechanism E ′. The configuration is the same as that of the timing device 1.
The second hand detection element KS detects the position of the second hand by detecting, using a Hall element or the like, a magnetic material magnetized in a predetermined magnetic information pattern attached to the gear of the second wheel 52 '. Further, the minute hand detecting element KM and the hour hand detecting element K
H also detects the positions of the minute hand and the hour hand in the same manner as the second hand detecting element KS. Thus, when shifting to the power saving mode, the hand movement can be stopped immediately regardless of the hand position at the time of shifting, so that energy consumption can be further reduced.

[3.2] Operation of Third Embodiment The operation of the third embodiment is different from the operation of the first embodiment in that, in the first embodiment, the hand position is changed when shifting to the power saving mode. Until it indicates "12: 00: 00: 00"
While the power supply was stopped after continuing the hand operation, the power supply was stopped immediately regardless of the hand position at the time of shifting to the power saving mode, and
In the embodiment, when returning to the current time, the return operation is performed based on the fact that the hand position indicates "12:00:00", whereas when returning to the current time, Another point is that the return operation is performed based on the hand position detected by the second hand detecting element KS, the minute hand detecting element KM, and the hour hand detecting element 7KH.

Next, the operation of the third embodiment will be described with reference to the operation flowchart shown in FIG. First, the time data control circuit 93 determines whether or not the operation mode currently set in the mode control circuit 96 is the power saving mode (step S41). Step S4
If it is determined in step 1 that the operation mode currently set in the mode control circuit 96 is the power saving mode (step S41; Yes), the process proceeds to step S45. On the other hand, when the operation mode currently set in the mode control circuit 96 is the display mode in the determination in step S41 (step S41; No), the power generation detection circuit 91 detects the power generation amount of the power generation device 40, It is determined whether it is in the power generation state (step S42). When the power generation detection circuit 91 determines that the power generation device 40 is in the power generation state (step S42; Yes), the process proceeds to step S53. On the other hand, when the power generation detection circuit 91 determines that the power generation device 40 is in the non-power generation state in the determination of step S42 (step S42; No),
The non-power generation time measurement circuit 84 increases the count value for counting the non-power generation time (step S43). Next, the mode control circuit 96 determines whether or not the count value counted by the non-power generation time measurement circuit 84 exceeds a value corresponding to a predetermined non-power generation time (step S44). . In the determination of step S44, when the mode control circuit 96 determines that the count value counted by the non-power generation time measuring circuit 84 does not exceed a value corresponding to a predetermined non-power generation time. (Step S44; No), the process proceeds to Step S42. On the other hand, step S44
When the mode control circuit 96 determines that the count value counted by the non-power generation time measurement circuit 84 exceeds the value corresponding to the predetermined non-power generation time, Step S44; Ye
s) The mode control circuit 96 shifts the operation mode from the display mode to the power saving mode, and transmits a power saving mode signal indicating that the operation mode is the power saving mode to the time data control circuit 93 (step S45). ).

Then, all the circuits except the power generation detection circuit 91 are disconnected from the high-capacity secondary power supply 48, and the supply of power to all the circuits except the power generation detection circuit 91 is stopped (step S46). . As described above, since the hand movement can be stopped immediately without being involved in the hand position at the time of shifting to the power saving mode, the hand position is set to “12” as in the first embodiment.
It is not necessary to continue hand movement until "00:00:00" is indicated, and the energy consumption can be further reduced.

Next, the power generation detection circuit 91
The power generation amount is detected, and it is determined whether or not the power is being generated (step S47). In the determination of step S47,
When the power generation detection circuit 91 determines that the power generation device 40 is in the non-power generation state (step S47; N
o), the process proceeds to step S47. On the other hand, in the determination of step S47, the power generation detection circuit 91
When it is determined that the power generation device 40 is in the power generation state (step S47; Yes), the power supply is restarted (step S48). Next, the charging voltage detection circuit 92
The system drive voltage Vss is compared with the lower limit voltage VL at which the return operation to the current time is possible, and the system drive voltage Vs
It is determined whether or not s exceeds the lower limit voltage VL necessary for normally completing the return operation to the current time (step S49). In the determination of step S49, the charging voltage detection circuit 92 sets the system drive voltage Vss to the lower limit voltage Vs necessary for normally completing the return operation to the current time.
L is not exceeded (step S4
9; No), for example, irregular hand movement such as two-second hand movement is performed to indicate to the user that the system drive voltage Vss is insufficient (step S54), and the process proceeds to step S54.
Move to 49. On the other hand, in the determination of step S49, when the charging voltage detection circuit 92 determines that the system drive voltage Vss has exceeded the lower limit voltage VL necessary for normally completing the return operation to the current time, ( (Step S49; Yes), the receiving circuit 25 receives the time data via the antenna 26 and transmits the time data to the time data control circuit 93 (Step S49).
50). Time data control circuit 93 that has received the time data
Is a second time counter 9 based on the received time data.
8 and the counter values of the hour / minute time counter 99 are set to the current time.

The second hand detecting element KS, the minute hand detecting element KM and the hour hand detecting element KH are respectively connected to the second wheel 5.
The current hand positions of the second hand, minute hand and hour hand are detected by detecting a magnetic material magnetized by a predetermined magnetic information pattern attached to the gears of 2 ′, second wheel 73 ′ and hour wheel 75 ′. The count value corresponding to the detected hand position is set in the second position counter 82 and the hour / minute position counter 86 (step S51). As a result, the hand position and the hour / minute position counter 8 before starting the return operation to the current time are set.
6 and the count value of the second position counter 82 are associated with each other. Then, the respective count values are transferred to the second time counter 9.
By adjusting the counter values to 8 and the hour / minute time counter 99, each hand position indicates the current time.

Next, a return operation of the second hand and the hour / minute hand to the current time is performed (step S52). Then, after returning to the current time, normal hand movement is performed, and the display of the current time is continued as the display mode (step S53).

[3.3] Modification of Third Embodiment In the above-described third embodiment, when detecting the hand position, the second hand detecting element KS, the minute hand detecting element KM, and the hour hand detecting element are used as magnetic sensors. Although the detection is performed using the detection element KH, the present invention is not limited thereto, and the current hand position may be detected by an optical sensor or an electrical contact provided in the wheel train mechanism for moving the hand. Specifically, a predetermined pattern created using reflection / non-reflection of light attached to the gear is detected by a light receiving / emitting element such as an LED or a photodiode, and a conductive material attached to the gear. The predetermined pattern of conduction / non-conduction made by the above method may be detected by electrical conduction.

[3.4] Effects of Third Embodiment As described above, according to the third embodiment, when shifting from the power saving mode to the display mode, the second hand detecting element K is used.
S, the count value corresponding to the hand position detected by the minute hand detecting element KM and the hour hand detecting element KH is set in the second position counter 82 and the hour / minute position counter 86, and the current time is set based on the set count value. Since the return operation is performed, the time display can be returned to the correct time. Further, at the time of shifting to the power saving mode, the hand operation can be stopped immediately, so that the energy consumption can be further reduced. Further, after shifting to the power saving mode, the supply of power from the high-capacity secondary power supply 48 is cut off to eliminate current consumption other than the power generation detection circuit 91, thereby minimizing the energy consumption of the high-capacity secondary power supply 48. It becomes possible.

[4] Modifications [4.1] First Modification In each of the above-described embodiments, the power generation detection circuit 91 shown in FIG. 5 is used, but the power generation detection circuit 91 shown in FIG. 10 is used. Circuit 91 'may be used. Power generation detection circuit 9
The detailed configuration of 1 'will be described with reference to FIG.
The power generation detection circuit 91 ′ shown in FIG.
8, a diode 29 connected between the positive side and the high potential side voltage Vdd, a transistor 36a, a capacitor 38 having a drain terminal connected to the current drawing side terminal of the transistor 36a, and a capacitor 38 connected in parallel. A pull-down resistor 39a that is connected and used to discharge the charge of the capacitor 38;
Inverter 7 whose drain terminal is connected to the input
8 and an inverter 79 connected in series to the inverter 78. The low potential side voltage Vss is applied to one terminal of the capacitor 38 and one terminal of the pull-down resistor 39a. The output signal of the inverter 79 is a power generation detection signal. Further, a resistor may be used instead of the diode 39. The resistance value of the resistor at this time is desirably about several hundred ohms.

In the above configuration, when an electromotive voltage is generated in the power generator 40, the rectifier circuit 47 supplies the high-capacity secondary power supply 48.
The charging current flows toward the
A current also flows through the switch, and a forward voltage Vf is generated. When the forward voltage Vf becomes higher than the threshold voltage Vth of the transistor 36a, the transistor 36a turns on. Thereafter, a voltage is generated between the terminals of the capacitor 38 and the inverter 7
8 goes to “H” level.
Becomes "H" level. On the other hand, when no electromotive voltage is generated in the power generation device 40,
Since the transistor 36a remains off, the electric charge of the capacitor 38 is discharged by the pull-down resistor 39a, the voltage between the terminals of the capacitor 38 decreases, and the input to the inverter 78 becomes "L" level. Becomes a "L" level. Here, when no electromotive voltage is generated in the power generation device 40, the power generation detection circuit 91 ′ can reduce the current consumption to zero and reduce the energy consumption of the high-capacity secondary power supply 48. Can be.

[4.2] Second Modification In each of the above-described embodiments, the power supply voltage is not supplied from the high-capacity secondary power supply 48 shown in FIG. In this circuit configuration example, the p-channel transistor 114 is connected in the middle of the line to which the high-potential-side voltage Vdd is supplied so as to cut off the supplied current. I had to use things. Therefore, it can also be realized by configuring the operation stopping means as shown in FIG. In addition,
Oscillator 22a, frequency divider 22b, level shifter 22c
Is a constant voltage drive circuit 1 driven by a constant voltage Vreg
11 is a concrete example. In this modification, the line having the high-potential-side voltage Vdd is referred to as a reference line a, the line having the low-potential-side voltage Vss is referred to as a power supply line b, and the line having a constant potential Vreg is referred to as a constant voltage line c. I do. Here, a p-channel transistor 121 is connected between the lines a and c, and the line a and the constant voltage circuit 1 are connected.
24, an inverter 122 is connected between the gate terminal of the p-channel transistor 123 and the output side of the control circuit 23. The gate terminal of the p-channel transistor 121 is connected to the output side of the control circuit 23. The operation stopping means is constituted by the p-channel transistors 121 and 123 and the inverter 122.

In the circuit configuration according to the second modification configured as described above, when the operation mode shifts from the display mode to the power saving mode, an “L” level signal is supplied from the control circuit 23 to the p-channel transistor 121 and the inverter. 122
Is output to As a result, the p-channel transistor 121 is turned “ON” to short-circuit the reference line a and the constant voltage line c.
2a, the supply of the constant voltage Vreg supplied to the frequency dividing circuit 22b and the level shifter 22c is stopped. Almost simultaneously, the p-channel transistor 123 includes the inverter 1
22, the transistor 123 is turned “OFF”, and the high-capacity secondary power supply 4 is turned off.
8, the supply of the charging voltage Vc supplied to the constant voltage circuit 124 is stopped, and the supply of the constant voltage Vreg is also stopped. on the other hand,
When the power generation is started, an “H” level signal is output from the control circuit 23, and the p-channel transistor 121 is turned “OFF” and the p-channel transistor 123 is turned “ON”. 124 to supply a constant voltage Vreg. As a result, the constant voltage Vreg is also supplied to the oscillation circuit 22a.
A reference pulse is generated from 2a.

In this circuit configuration, p-channel transistors 121 and 123 having relatively low withstand voltage can be used, and the supply of charging voltage Vc is stopped to reduce the current consumption in constant voltage circuit 124 to almost zero. can do. In order to stop the supply of the constant voltage Vreg, the p-channel transistor 121 is set to “O”.
The N-state is set, but the p-channel transistor 121 is connected in the middle of the constant voltage line c to turn the p-channel transistor 121 to the “OFF” state and the charging voltage Vc
May be stopped. Control circuit 2
3 may incorporate the latch circuit 113 illustrated in FIG.

[4.3] Third Modification In each of the above-described embodiments, the power generation detection circuit 9
1, but a portable detection circuit 88 may be provided instead of the power generation detection circuit 91 as shown in FIG. The portable detection circuit 88 switches the mode between the power saving mode and the normal operation mode by detecting the portable state of the timing device. For example, in the flowchart of FIG. 3, in step S2, it is determined whether or not the mobile phone is carried by the signal detected by the mobile detection circuit 34. Mobile phone detection circuit 3
If the device 4 is used, in combination with the power generation by the solar battery 89, the mode is not shifted to the power saving mode while the mobile phone is in the dark, and the time display is stopped and the mode is shifted to the power saving mode when the mobile phone is stopped. A mode transition that is natural for the user can be realized. Note that the portable detection circuit 88
May be an acceleration sensor that detects acceleration generated when the timepiece is carried, a detection device that detects a change in interelectrode resistance or interelectrode capacitance when the timepiece is carried, a piezoelectric element, or the like.

[4.4] Fourth Modification In each of the above-described embodiments, an electromagnetic induction generator is used as an example of the power generation device 40.
Alternatively, a power generation device having a thermoelectric element and a piezo element may be used. Further, a timing device in which two or more types of these power generation devices coexist may be used.

[4.5] Fifth Modification In each of the above embodiments, the rectifier circuit 19
Either half-wave rectification or full-wave rectification may be used. Further, a diode may be used as the rectifier circuit 19, or a plurality of active elements may be used.

[4.6] Sixth Modification In each of the above-described embodiments, the hour / minute motor and the second motor that independently drive the hour / minute hand and the second hand are used as the pointer driving motors. One hand driving motor for driving all the minute and second hands may be used, or the hour hand, minute hand and second hand may be driven independently.
One pointer drive motor may be used. Furthermore, the second display may be performed by a liquid crystal display, and only the hour and minute hands may be driven by a motor, or the time and date displays may be all liquid crystal displays.

[4.7] Seventh Modification In each of the above-described embodiments, the ferrite antenna 26 is used as an antenna for receiving a long-wave standard time signal on which time information is superimposed. When receiving FM multiplex broadcasting (from 76 MHz to 108 MHz), a loop antenna or a ferrite antenna may be used, or a radio wave (1.5 GHz) superimposed with time information from a GPS satellite is received. In such a case, a microstrip antenna or a helical antenna may be used.

[4.8] Eighth Modification In each of the above embodiments, the power generation detection circuit 9
Although the high-resistance resistor 39 is used to discharge the electric charge of the capacitor 38 provided in 1, a small constant current source of about several nA may be used.

[4.9] Ninth Modification In each of the above-described embodiments, the time display of hours, minutes, and seconds is automatically corrected based on the long-wave standard radio wave on which time information is superimposed. However, not only the time display of hour, minute, second,
The display of the date may be automatically corrected. As described above, since the longwave standard time signal also includes date information, when a motor for driving the calendar display is provided in addition to the motor for driving the hour / minute / second display, the date is based on the longwave standard time signal. Can be automatically corrected. In this case, an element for detecting a calendar display position may be added.

[5] Other Aspects of the Invention According to a first aspect, in a control method of a timekeeping device provided with a time display device for displaying time, an oscillation step of generating a basic pulse and a portable state of the timekeeping device are performed. A portable state detection step of detecting and outputting a portable state detection signal, and being started based on the portable state detection signal, and an operation mode of the time display device, a power saving mode for stopping the time display, and the time display. A mode transition step of transitioning between normal operation modes to be performed, a reception step of receiving time information from the outside, and, when the operation mode transitions from the power saving mode to the normal operation mode, based on the time information. A current time return step of returning the time displayed by the time display device to the current time, and in the power saving mode, Stop the operation,
It is characterized in that only the portable state detecting step is set to the operating state.

According to a second aspect, in the control method of the timekeeping device according to the first aspect, the mode transition step includes the step of: determining that the mobile terminal is in the non-portable state based on the mobile state detection signal. The operation mode is shifted from the normal operation mode to the power saving mode.

[0091] The invention according to a third aspect is the control method for a timekeeping device according to the second aspect, wherein the non-portable state is determined to be non-portable based on the portable state detection signal. It is characterized in that the detected state continues for a predetermined time or more.

According to a fourth aspect of the present invention, in the control method of the timekeeping device according to the first aspect, the time display device has an hour hand, a minute hand and a second hand, and the current time return step includes When returning to the time, the hands of the hour hand, minute hand and second hand are returned at a high hand movement speed that is higher than the normal hand movement speed.

According to a fifth aspect of the present invention, in the method for controlling the timekeeping device according to the first aspect, the time display device has an hour hand, a minute hand and a second hand, and the mode shifting step includes the operation mode When shifting the mode from the normal operation mode to the power saving mode, wait until the hour hand, minute hand and second hand reach a predetermined hand position, then shift to the power saving mode, the current time return step, And returning to the current time based on the predetermined hand position.

According to a sixth aspect of the invention, in the control method of the timepiece device according to the first aspect, the time display device has an hour hand, a minute hand and a second hand, and the timepiece device has the hour hand, A hand position counter step of counting a count value corresponding to the hand position of the minute hand and the second hand, and a nonvolatile memory step of storing the counter value when the operation mode shifts from the normal operation mode to the power saving mode,
Wherein the current time return step is to return to the current time based on the counter value.

[0095] The invention according to a seventh aspect is the control method of the timepiece device according to the first aspect, wherein the time display device has an hour hand, a minute hand, and a second hand, and the timepiece device has a current hand. The method further includes a hand position detecting step of detecting a position, and the current time returning step includes returning to the current time based on the current hand position.

[0096] The invention according to an eighth aspect is the control method of the timekeeping device according to any one of the first to seventh aspects, wherein the power generation device converts external energy into electric energy to generate electric power, A power storage device for storing the power generated by the power generation device, wherein the power storage device supplies power only to the portable state detection means in the power saving mode.

According to a ninth aspect of the present invention, in the control method of the timekeeping device according to the eighth aspect, the power generation device includes:
At least a rotating weight and a rotor, the power generation device,
The electric power is generated by rotating the rotor by the turning motion of the rotary weight.

According to a tenth aspect, in the control method of the timepiece according to the eighth aspect, the portable state detecting step includes detecting a portable state based on a voltage generated by the power generator. Features.

[0099] The invention according to an eleventh aspect is the control method of the timekeeping device according to the eighth aspect, further comprising a voltage detecting step of detecting a storage voltage stored in the power storage device, wherein the current time return step is performed. When the operation mode shifts from the power saving mode to the normal operation mode, if the storage voltage detected in the voltage detection step is less than a predetermined voltage, the operation mode returns to the current time. The current time return operation is not performed.

The invention according to a twelfth aspect is the control method of the timepiece according to the eleventh aspect, wherein the predetermined voltage is set so that the current time return step completes the return to the current time. It is characterized by the required voltage.

The invention according to a thirteenth aspect is the control method of the timepiece device according to the eleventh aspect, wherein the receiving step is performed when the operation mode shifts from the power saving mode to the normal operation mode. When the stored voltage detected in the voltage detecting step is lower than a predetermined voltage, the time information is not received.

According to a fourteenth aspect, in the control method of the timepiece according to the eleventh aspect, when the operation mode shifts from the power saving mode to the normal operation mode, the voltage is detected in the voltage detecting step. When the stored storage voltage is lower than a predetermined voltage, a notification step is provided for notifying that time cannot be restored.

According to a fifteenth aspect, in the control method of the timepiece device according to the fourteenth aspect, the notifying step includes a hand movement interval changing step of changing a hand movement interval of the time display device. The hand movement interval changing step is characterized in that at the time of the notification, the hand movement interval of the time display device is changed.

[0104]

As described above, according to the present invention, the power consumption in the power save mode can be reduced as much as possible, and the return to the current time can be accurately performed.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a schematic configuration of a timing device according to a first embodiment.

FIG. 2 is a block diagram illustrating a schematic configuration of a control unit according to the first embodiment.

FIG. 3 is a flowchart illustrating an operation example according to the first embodiment.

FIG. 4 is a block diagram illustrating a configuration of a receiving circuit in each embodiment.

FIG. 5 is a block diagram illustrating a configuration of a power generation detection circuit in each embodiment.

FIG. 6 is a block diagram illustrating a schematic configuration of a control unit according to a second embodiment.

FIG. 7 is a flowchart illustrating an operation example according to the second embodiment.

FIG. 8 is a diagram illustrating a configuration example of a needle position detecting element according to a third embodiment.

FIG. 9 is a flowchart illustrating an operation example according to the third embodiment.

FIG. 10 is a block diagram showing a modification of the power generation detection circuit.

FIG. 11 is a block diagram illustrating a configuration example for shutting off a power supply in each embodiment.

FIG. 12 is a block diagram showing a modification of the configuration for shutting off power.

FIG. 13 is a diagram showing a time code format of a long-wave standard radio signal.

FIG. 14 is a diagram illustrating signal types of a long-wave standard radio signal.

FIG. 15 is a block diagram showing a timepiece provided with a portable detection circuit according to a modification.

[Explanation of symbols]

1 time counting device E hand movement mechanism (time display means) 23 control circuit (current time return means, notification means, hand movement interval changing means) 25 receiving circuit (receiving means) 26 Antenna (receiving means), 40 ... power generation device (power generation means), 43 ... power generation rotor (rotor), 45 ... rotating weight, 48 ... high capacity secondary power supply (power storage means), 55 ... second hand, 76: minute hand, 77: hour hand, 82: second position counter (hand position counter means), 86: hour / minute position counter (hand position counter means), 88 ... non-volatile memory section (non-volatile memory means) Reference numeral 91: Power generation detection circuit (portable state detecting means) 91a: Portable detection circuit (portable state detecting means) 92: Charge voltage detecting circuit (voltage detecting means) 96: Mode control circuit (mode shifting means)

Claims (16)

[Claims] 1. A timepiece provided with time display means for displaying time, an oscillation circuit for generating a basic pulse, and a portable state detection means for detecting a portable state of the timepiece and outputting a portable state detection signal. Activated based on the portable state detection signal,
A mode transition unit that transitions an operation mode of the time display unit between a power saving mode for stopping the time display and a normal operation mode for performing the time display, a reception unit that receives time information from outside, and the operation mode. Current time return means for returning the time displayed by the time display means to the current time, based on the time information, when shifting from the power saving mode to the normal operation mode, In this case, the operation of the oscillating circuit is stopped, and only the portable state detecting means is brought into an operating state. 2. The timekeeping device according to claim 1, wherein the mode transition unit changes the operation mode from the normal operation mode when the non-portable state is detected based on the portable state detection signal. A timing device for shifting to a power saving mode. 3. The timekeeping device according to claim 2, wherein the non-portable state is equal to or longer than a predetermined time in which a state in which the timekeeping device is detected as non-portable based on the portable state detection signal is predetermined. A timing device characterized in that it is a case where it is continued. 4. The timekeeping device according to claim 1, wherein the time display means has an hour hand, a minute hand, and a second hand, and the current time return means sets the hour hand, the minute hand, and the second hand when returning to the current time. A timing device for returning the hand movement at a high hand movement speed higher than the normal hand movement speed. 5. The timekeeping device according to claim 1, wherein the time display means has an hour hand, a minute hand, and a second hand, and the mode shift means shifts the operation mode from the normal operation mode to the power saving mode. At this time, after waiting until the hour hand, minute hand and second hand reach a predetermined predetermined hand position, the mode is shifted to the power saving mode, and the current time return means sets the current time based on the predetermined hand position. A timing device characterized by returning. 6. The timekeeping device according to claim 1, wherein the time display means has an hour hand, a minute hand, and a second hand, and the timepiece counts a count value corresponding to a position of the hour hand, the minute hand, and the second hand. Hand position counter means, and a nonvolatile memory means for storing the counter value when the operation mode shifts from the normal operation mode to the power saving mode, wherein the current time return means includes the counter value A clock device for returning to the current time on the basis of 7. The timekeeping device according to claim 1, wherein the time display means has an hour hand, a minute hand, and a second hand, and the timekeeping apparatus includes a hand position detection means for detecting a current hand position. A time resetting means for returning the current hand position to a current time based on the current hand position. 8. The timekeeping device according to claim 1, wherein the power generation means converts external energy into electric energy to generate power, and the power storage means stores power generated by the power generation means. And a power supply unit that supplies power only to the portable state detection unit in the power saving mode. 9. The timekeeping device according to claim 8, wherein the power generating means has at least a rotating weight and a rotor, and the power generating means generates power by rotating the rotor by a turning motion of the rotating weight. A timing device characterized by the above-mentioned. 10. The timekeeping device according to claim 8, wherein the portable state detection means detects a portable state based on a voltage generated by the power generation means. 11. The timekeeping device according to claim 8, further comprising voltage detection means for detecting a storage voltage stored in the power storage means, wherein the current time return means changes the operation mode from the power saving mode to the normal operation. When shifting to the mode, if the storage voltage detected by the voltage detection means is less than a predetermined voltage, the current time return operation for returning to the current time is not performed. Timekeeping device. 12. The timekeeping device according to claim 11, wherein the predetermined voltage is a voltage necessary for the current time return means to complete the return to the current time. 13. The timekeeping device according to claim 11, wherein the receiving unit detects the storage voltage detected by the voltage detecting unit when the operation mode shifts from the power saving mode to the normal operation mode. When the voltage is lower than a predetermined voltage, the time information is not received. 14. The timekeeping device according to claim 11, wherein the storage voltage detected by the voltage detection means when the operation mode shifts from the power saving mode to the normal operation mode is a predetermined voltage. If less than
A timekeeping device comprising a notification unit for notifying that time cannot be reset. 15. The timekeeping device according to claim 14, wherein the notifying unit includes a hand movement interval changing unit that changes a hand movement interval of the time display unit, and the hand movement interval changing unit performs the notification when the notification is performed. A timekeeping device for changing a hand movement interval of a time display means. 16. A method of controlling a timepiece provided with a time display device for displaying time, comprising: an oscillation circuit for generating a basic pulse; and a portable state for detecting a portable state of the timepiece and outputting a portable state detection signal. A detecting step, which is started based on the portable state detection signal,
A mode transition step of transitioning an operation mode of the time display device between a power saving mode for stopping the time display and a normal operation mode for performing the time display; a reception step of receiving time information from outside; and the operation mode A current time return step of returning the time displayed by the time display device to the current time based on the time information, when the mode shifts from the power saving mode to the normal operation mode. In this case, the operation of the oscillating circuit is stopped, and only the portable state detecting step is set to the operating state.