JP2002311169A - Electronic equipment and its control method, and clocking apparatus and its control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clocking apparatus for saving energy without causing a user to feel inconvenience in a watch apparatus where a stepping motor for moving clock hands and a generation apparatus are accommodated together. SOLUTION: In the clocking apparatus 1 incorporating the generation apparatus 40 for generation by capturing kinetic energy using a rotary weight, a generation state detection section 91 detects whether the generation apparatus 40 is generating power or not. When non-generation time exceeds specific time, shifting is made to a power-saving mode and time display is stopped. Then, when generation is detected by the generation state detection section 91, return is made to a display mode to resume time display. The generation apparatus 40 using the rotary weight generates power by capturing the movement or the like in a user's arm, and hence can accurately judge whether the apparatus is being carried or not according to the presence or absence of generation. When the apparatus is being carried, time display continues regardless of nighttime and winter. When the apparatus is being carried, no time display is made for saving power even if it is bright.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electronic equipment, and more particularly to a timekeeping device having a time display function and a control method thereof.

[0002]

2. Description of the Related Art In recent years, a small electronic timepiece such as a wristwatch, which incorporates a power generation device such as a solar cell and operates without battery replacement, has been realized. These electronic watches have the function of once charging the power generated by the power generator to a large-capacity capacitor, and when power is not generated, the time is displayed using the power discharged from the capacitor. ing. For this reason, stable operation is possible for a long time without batteries, and considering the trouble of battery replacement and battery disposal, it is expected that many electronic watches will have a built-in power generator in the future. ing.

[0003]

However, a power generation device built in a wristwatch or the like has a solar cell that converts irradiated light into electric energy, or a kinetic energy that is obtained by capturing the movement of a user's arm and the like. Power generation system. These power generation devices are excellent in terms of converting the energy around the user to electric energy for use, but have a problem in that the available energy density is low and continuous energy cannot be obtained. . Therefore, continuous power generation is not performed, and during that time, the electronic timepiece operates with the power stored in the large-capacity capacitor. For this reason, it is desirable that the large-capacity capacitor has a capacity as large as possible. On the other hand, if the capacity is small, the electronic timepiece stops if the period during which power cannot be generated becomes long, and even if the electronic timepiece starts operating by being illuminated again, the time display is incorrect and an accurate current time is not displayed. Therefore, the function as a clock is not fulfilled.

In a wristwatch device using a solar battery, the surrounding illuminance can be detected by using the solar battery. When the illuminance falls below a set value, the time display is stopped and the time during which the device is stopped is measured by an internal counter. When the illuminance becomes high, a system is considered in which the time display is restarted and the current time is returned to the current time based on the value of an internal counter. In such a wristwatch device, the display operation of the time is stopped in a state where the light is turned off, such as when the user is asleep, to save energy, and when the display becomes bright in the morning, the time display is automatically restarted and returned to the current time. . Therefore, the duration of the large-capacity capacitor can be extended without causing any inconvenience to the user, and the wristwatch can be operated for a long time. In addition, by using a system in which the time display is stopped after a certain period of time has elapsed due to a decrease in illuminance, the time display is continued if the illuminance decreases for a short time such as when the wrist watch is hidden by clothing. It can also save energy without inconveniencing users.

[0005] However, there are many times when it is desired to see the time even at night, and it is inconvenient that the current time is not immediately known at that time. In addition, in the winter season when a coat or the like is worn, there are many occasions where light does not hit the wristwatch. In such a case, if the time measurement is stopped, the function as a wristwatch cannot be performed. Conversely, even if the wristwatch is not worn, if it is left indoors or the like, faint light shines on it, so that time measurement is performed and wasteful power consumption occurs.

The present invention has been made in view of the above circumstances, and has as its object to provide an electronic device capable of switching between a power saving mode and an operation mode in accordance with a use state of a user, and a control method thereof. . Another object of the present invention is to provide a timekeeping device capable of displaying time accurately over a long period of time without using a battery, and a control method thereof.

[0007]

In order to solve the above-mentioned problems, an electronic apparatus according to the present invention includes a power generation unit that converts kinetic energy into electric energy to generate AC power, and rectifies the generated AC power. And a power consuming unit that operates using electric power supplied from the power supply unit, a power generation state detection unit that detects a power generation state of the power generation unit, and a detection result of the power generation state detection unit. A power saving mode for stopping the operation of the power consuming unit and a control unit for controlling switching between an operation mode for operating the power consuming unit based on the power saving mode. Further, the control method of the electronic device according to the present invention includes a power generation unit that converts kinetic energy into electric energy to generate AC power, a power supply unit that rectifies the generated AC power and stores the power, and the power supply unit. A method for controlling an electronic device, comprising: a power consuming unit that operates using supplied power, wherein a power generation state of the power generating unit is detected, and based on the detection result, the operation of the power consuming unit is stopped. Switching between a power saving mode and an operation mode for operating the power consuming unit is controlled. In this case, when the user carries the electronic device, the power generation unit converts the kinetic energy into electric energy to generate AC power in accordance with the electronic device. Can be determined. Further, since the mode can be switched between the power saving mode and the operation mode according to the use state, useless power consumption can be reduced.

The power generation state detecting section according to the present invention may detect a power generation state based on an electromotive voltage of the power generation section. In this case, the power generation state detection unit may compare the electromotive voltage of the power generation unit with a plurality of set voltage values, and detect the power generation state according to the comparison result. May be selected according to the current mode, and the power generation state may be detected by comparing the electromotive voltage of the power generation unit with the selected set voltage value. further,
It is preferable that the set voltage value used for mode switching from the power saving mode to the operation mode be set higher than the set voltage value used for switching from the operation mode to the power saving mode. In this case, when shifting from the power saving mode to the operation mode, strong power generation must be performed, so that the power consuming unit can be operated when power generation is reliably performed. In the electronic device control method, the power generation state of the power generation unit may be detected by comparing the electromotive voltage of the power generation unit with a set voltage value and detecting the power generation state according to the comparison result.

The power generation state detecting section according to the present invention may detect the power generation state based on the charging current of the power supply section. In this case, the power generation state detection unit may compare the charging current of the power supply unit with a plurality of set current values, and detect the power generation state according to the comparison result. May be selected according to the current mode, and the power generation state may be detected by comparing the charging current of the power generation unit with the selected set current value. Further, it is preferable that the set current value used for switching the mode from the power saving mode to the operation mode is set higher than the set current value used for switching the mode from the operation mode to the power saving mode.
In this case, when shifting from the power saving mode to the operation mode, strong power generation is required, so that the power consuming unit can be operated when power generation is reliably performed. In the electronic device control method, the power generation state of the power generation unit may be detected by comparing the charging current of the power supply unit with a set voltage value and detecting the power generation state according to the comparison result.

The power generation state detecting section according to the present invention may detect the power generation state based on the power generation continuation time of the power generation section. The power generation state detection unit includes a switching unit that switches according to a cycle of the AC power generated by the power generation unit, a capacitance element that stores electric charge according to a switching operation performed by the switching unit, and a discharge of the capacitance element. A discharge unit that is inserted into the path and discharges the charge stored in the capacitance element, and a measurement unit that measures a period during which the voltage of the capacitance element exceeds a predetermined value and measures the power generation continuation time. preferable. In this case, the power generation continuation time can be measured with a simple configuration. Further, the power generation state detection unit may compare the power generation continuation time of the power generation unit with a plurality of set time values and detect the power generation state based on the comparison result. In addition, the power generation state detection unit detects the power generation state by selecting the plurality of set time values according to the current mode, and comparing the power generation continuation time of the power generation unit with the set time value. Well,
Further, a plurality of set time values may be selected according to the current mode, and the power generation continuation time of the power generation unit may be compared with the set time value. Further, it is preferable that the set time value used for switching the mode from the power saving mode to the operation mode is set longer than the set time value used for switching from the operation mode to the power saving mode. In this case, when shifting from the power saving mode to the operation mode, strong power generation is required, so that the power consuming unit can be operated when power generation is reliably performed. In the control method of the electronic device, the power generation state of the power generation unit may be detected by comparing the power generation continuation time value of the power generation unit with the set time value and detecting the power generation state according to the comparison result.

The power generation state detecting section according to the present invention may detect the power generation state based on the power generation frequency of the power generation section. Further, the power generation state detection unit counts the number of the peaks of the electromotive voltage during a period from when the electromotive voltage of the power generation unit exceeds a set voltage value to when a set time has elapsed, so that the power generation state of the power generation unit is calculated. The frequency may be detected. Further, the power generation state detection unit may compare the power generation frequency of the power generation unit with a plurality of set frequency values and detect the power generation state based on the comparison result. The power generation state detection unit detects the power generation state by selecting the plurality of set frequency values according to the current mode and comparing the power generation frequency value of the power generation unit with the set frequency value set. It is preferable that the set frequency value used for switching from the power saving mode to the operation mode be set higher than the set frequency value used for switching from the operation mode to the power saving mode. In this case, when shifting from the power saving mode to the operation mode, strong power generation is required, so that the power consuming unit can be operated when power generation is reliably performed. In the electronic device control method, the power generation state of the power generation unit may be detected by comparing the power generation frequency value of the power generation unit with the set frequency value, and detecting the power generation state according to the comparison result.

It is preferable that the power generation unit according to the present invention includes a rotating weight that performs a turning motion and a power generating element that generates an electromotive force by the rotating motion of the rotating weight. In this case, if the electronic device is mounted on the user's arm, power generation is performed by capturing the movement of the arm or the vibration of the body. In addition, even in the case of being put in a pocket or the like, power generation is performed by capturing the vibration of the body and the vibration of the vehicle. On the other hand, when it is left on a desk at home or in a storage, no vibration is applied and the rotating weight does not move, so that power is not generated. Therefore, it is possible to determine whether the electronic device is carried by the user based on the power generation state of the power generation unit. By switching the mode in this manner, the operation mode can be set when the electronic device is carried by the user and in use, and the power saving mode can be set when the electronic device is not carried and left unattended. Therefore, even if the user carries the electronic device at night or in winter, the operation is performed, so that the energy consumption can be saved without causing any inconvenience to the user.

Further, the power generation unit according to the present invention comprises: an elastic member to which a deforming force is applied; rotating means for performing a rotating motion by a restoring force of the elastic member to return to its original shape; And a power generating element that generates an electromotive force. Further, the power generation unit according to the present invention may be a piezoelectric element that generates an electromotive force by a piezoelectric effect when a displacement is applied.

Further, in the timekeeping device according to the present invention, in the electronic device, the power consuming unit includes a time display unit that displays time using power supplied from the power supply unit, and displays the operation mode with time. The display mode is a mode in which the unit displays time. The method for controlling a timekeeping device according to the present invention, in the method for controlling an electronic device, comprises configuring the power consuming unit with a time display unit that displays time using power supplied from the power supply unit, and displays the operation mode with time. The display mode is a mode in which the unit displays time. In these cases, the time display can be switched as needed, and power consumption can be reduced.

[0015]

DETAILED DESCRIPTION OF THE INVENTION [1. First Embodiment] [1-1: Overall Configuration] A first embodiment according to the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of a timing device 1 according to an embodiment of the present invention. 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 includes 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, and a power generation unit A. (A power generation state detection unit 91 to be described later), a control unit C that controls the entire apparatus based on the detection result, a hand movement mechanism D that drives the operating hands using the step motor 10, and a control unit C. And a driving unit E that drives the fingering mechanism D based on the control signal. Here, the control unit C drives the fingering mechanism D to display the time according to the power generation state of the power generation unit A, and the power saving mode in which the power supply to the hand movement mechanism D is stopped to save power. And is switched. The transition from the power saving mode to the display mode is forcibly made by the user holding the timepiece 1 and shaking it. Hereinafter, each component will be described. The control unit C will be described later using functional blocks.

First, the power generation section A includes a power generation device 40, a rotary weight 45, and a speed increasing gear 46. Generator 40
An electromagnetic induction type AC power generation device capable of rotating the power generation rotor 43 inside the power generation stator 42 and outputting the power induced in the power generation coil 44 connected to the power generation stator 42 to the outside is employed. . In addition, the rotating weight 45
It 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.

Next, the power supply section B comprises a diode 47 acting as a rectifier circuit, a large-capacity capacitor 48, and a step-up / step-down circuit 49. The step-up / step-down circuit 49 is capable of multi-step boosting and stepping-down using a plurality of capacitors 49a, 49b, and 49c, and adjusts a voltage supplied to the drive unit E 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 sets Vdd (high voltage side) to the reference potential (G
ND), and Vss (low voltage side) is generated as a power supply voltage.

Next, the hand movement mechanism D will be described. The stepping motor 10 used in the hand movement mechanism D is also called a pulse motor, a stepping motor, a stepping motor, a digital motor, or the like, and is a motor driven by a pulse signal that is frequently 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 an electronic watch,
It is a timing device such as a time switch and a chronograph.

The stepping motor 10 of this embodiment has a driving coil 11 for generating a magnetic force by a driving pulse supplied from a driving unit E, a stator 12 excited by the driving coil 11, and an excitation inside the stator 12. The rotor 13 is rotated by the applied magnetic field. The stepping motor 10 is of a PM type (permanent magnet rotating type) in which the rotor 13 is formed of a disk-shaped two-pole permanent magnet. The stator 12 is provided with a magnetic saturation portion 17 so that different magnetic poles are generated in respective phases (poles) 15 and 16 around the rotor 13 by a magnetic force generated by the drive coil 11. Further, an inner notch 18 is provided at an appropriate position on the inner periphery of the stator 12 to regulate the rotation direction of the rotor 13, so that cogging torque is generated so that the rotor 13 stops at an appropriate position. ing.

The rotation of the rotor 13 of the stepping motor 10 is controlled by the fifth wheel 5 meshed with the rotor 13 through the pinion.
1, fourth wheel 52, third wheel 53, second wheel 54, minute wheel 5
The power is transmitted to each hand by a train wheel 50 including the wheel 5 and the hour wheel 56. A second hand 61 is connected to the shaft of the fourth wheel & pinion 52, a minute hand 62 is connected to the second wheel & pinion 54, and an hour hand 63 is connected to the hour wheel & pinion 56. The time is displayed by each of these hands in conjunction with the rotation of the rotor 13. It is of course possible to connect a transmission system (not shown) for displaying the date and the like to the wheel train 50.

Next, the drive section E supplies various drive pulses to the stepping motor 10 under the control of the control section C.
The driving unit E includes a p-channel MOS 33 connected in series.
a and n-channel MOS 32a and p-channel M
A bridge circuit including the OS 33b and the n-channel MOS 32b is provided. In addition, the driving unit E
Rotation detecting resistors 35a and 35b connected in parallel with the channel MOSs 33a and 33b, respectively, and sampling p-channel MOSs 34a and 34b for supplying chopper pulses to the resistors 35a and 35b are provided. Therefore, these MOS
32a, 32b, 33a, 33b, 34a and 34b
By applying control pulses having different polarities and pulse widths from the control unit C to the respective gate electrodes at respective timings, drive pulses having different polarities can be supplied to the drive coil 11, or for detecting rotation of the rotor 13. A detection pulse for exciting an induced voltage for detecting a magnetic field can be supplied.

[1-2: Control Unit] Next, the configuration of the control unit C will be described with reference to FIG. FIG. 2 is a functional block diagram of the control unit C and its peripheral configuration. The control section C includes a pulse synthesis circuit 22, a mode setting section 90, a time information storage section 96, and a drive control circuit 24. First, the pulse synthesizing circuit 22 includes a reference oscillation source 21 such as a quartz oscillator.
Oscillator circuit that oscillates a reference pulse with a stable frequency using a multiplexing circuit, and synthesizes a divided pulse obtained by dividing the reference pulse and the reference pulse to generate pulse signals with different pulse widths and timings Is done.

Next, a mode setting section 90 includes a power generation state detection section 91, a set value switching section 95 for switching a set value used for detecting the power generation state, and a voltage detection circuit for detecting the charging voltage Vc of the large-capacity capacitor 48. 92, a central control circuit 93 that controls the time display mode according to the power generation state and controls the boosting ratio based on the charging voltage, and a mode storage unit 94 that stores the mode.

The power generation state detecting section 91 is provided with a power generation device 40
A first detection circuit 97 for comparing the electromotive voltage Vgen with the set voltage value Vo to determine whether or not power generation has been detected, and an electromotive voltage Vgen not less than the set voltage value Vo and not less than the set voltage value Vbas are obtained. A second detection circuit 98 for comparing the measured power generation continuation time Tgen with a set time value To to determine whether or not power generation has been detected. If either one of the conditions is satisfied, it is determined that the vehicle is in a power generation state. Here, each of the set voltage values Vo and Vbas is a negative voltage based on Vdd (= GND), and indicates a potential difference from Vdd. The configuration of the first and second detection circuits 97 and 98 will be described later.

Here, the set voltage value Vo and the set time value To can be switched by the set value switching section 95. When switching from the display mode to the power saving mode, the set value switching unit 95 changes the set values Vo and To of the first and second detection circuits 97 and 98 of the power generation detection circuit 91. In this example, the display mode setting value V
a and Ta are set values Vb and T of the power saving mode.
A value lower than b is set. Therefore, large power generation is required to switch from the power saving mode to the display mode. Here, the degree of the power generation is not enough to be obtained by carrying the timekeeping device 1 normally, but needs to be large when the user forcibly charges the battery by hand gesture. In other words, the set values Vb and Tb of the power saving mode are set so that forced charging by hand movement can be detected.

The central control circuit 93 includes a non-power generation time measuring circuit 99 for measuring a non-power generation time Tn during which no power is detected by the first and second detection circuits 97 and 98. When the predetermined time is exceeded, 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 condition that the power generation unit A detects that the power generation unit A is in the power generation state and the charging voltage VC of the large-capacity capacitor 48 is sufficient is satisfied. Is executed. by the way,
Since the power supply unit B of this example includes the step-up / step-down circuit 49,
It is possible to drive the hand movement mechanism D by raising the power supply voltage using the step-up / down circuit 49 even when the charging voltage VC is somewhat low. Therefore, the central control circuit 93
Determines the step-up ratio based on the charging voltage VC, and controls the step-up / step-down circuit 49. However, if the charging voltage VC is too low, a power supply voltage that can operate the hand movement mechanism D cannot be obtained even if the charging voltage VC is increased. In such a case, when the mode is shifted from the power saving mode to the display mode, accurate time display cannot be performed, and wasteful power is consumed. Therefore, in this example, it is determined whether the charging voltage VC is sufficient by comparing the charging voltage VC with a predetermined set voltage value Vc, and this is shifted from the power saving mode to the display mode. It is one condition to do.

The mode thus set is stored in the mode storage unit 94, and the information is supplied to the drive control circuit 24, the time information storage unit 96, and the set value switching unit 95. In the drive control circuit 24, when switching from the display mode to the power saving mode, the supply of the pulse signal to the drive unit E is stopped, and the operation of the drive unit E is stopped. As a result, the motor 10 stops rotating and the time display stops.

Next, the time information storage section 96 is composed of a counter and a memory (not shown). When the mode is switched from the display mode to the power saving mode, the time information storage section 96 receives the reference signal generated by the pulse synthesizing circuit 22. When the time measurement is started and the mode is switched from the power saving mode to the display mode, the time measurement is ended. Thus, the duration of the power saving mode is measured. Here, the duration of the power saving mode is stored in the memory. Also,
When the mode is switched from the power saving mode to the display mode, the fast-forward pulse supplied from the drive control circuit 24 to the drive unit E is counted using the counter, and when the count value becomes a value corresponding to the duration of the power saving mode, the fast-forwarding is performed. A control signal for stopping the transmission of the pulse is generated and supplied to the driving unit E. Therefore, the time information storage unit 96 also has a function of returning the redisplayed time display to the current time. The contents of the counter and the memory are reset when switching from the display mode to the power saving mode.

Next, the drive control circuit 24 generates a drive pulse according to the mode based on various pulses output from the pulse synthesis circuit 22. First, in the power saving mode, the supply of the driving pulse is stopped. Next, immediately after switching from the power saving mode to the display mode, a fast-forward pulse with a short pulse interval is supplied as a driving pulse to the driving unit E in order to return the redisplayed time display to the current time. . Next, after the supply of the fast-forward pulse ends,
A driving pulse having a normal pulse interval is supplied to the driving unit E.

[1-3: Power Generation State Detecting Section] Next, the configuration of the power generation state detecting section 91 will be described with reference to the drawings. FIG.
9 is a circuit diagram of a power generation state detection unit 91. FIG. In FIG. 3, the first detection circuit 97 generates a voltage detection signal Sv that goes high when the amplitude of the electromotive voltage Vgen exceeds a predetermined voltage, and goes low when the amplitude falls below the predetermined voltage. On the other hand, the second detection circuit 98 generates a power generation continuation time detection signal St that goes high when the power generation duration exceeds a predetermined time and goes low when the power generation duration falls short of the predetermined time. In addition, the voltage detection signal Sv and the power generation continuation time detection signal St are
The logical sum is calculated at 75, and this is supplied to the central control circuit 93 as the power generation state detection signal S. The power generation state detection signal S indicates a power generation state at a high level, and indicates a non-power generation state at a low level. Therefore, when any one of the first and second detection circuits 97 and 98 satisfies the condition as described above, the power generation state detection unit 91 determines that the power generation state is established.
Hereinafter, the first detection circuit 97 and the second detection circuit 98 will be described in detail.

[1-3-1: First Detecting Circuit] In FIG. 3, first, the first detecting circuit 97 includes a comparator 97
1. The reference voltage sources 972, 973 for generating a constant voltage, the switch SW1, and the retriggerable mono-multi 974 are provided. The generated voltage value of the reference voltage source 972 is the set voltage value Va in the display mode, while the generated voltage value of the reference voltage source 973 is the set voltage value Vb in the power saving mode. The reference voltage sources 972 and 973 are connected to the positive input terminal of the comparator 971 via the switch SW1. The switch SW1 is controlled by the set value switching unit 95, and connects the reference voltage source 972 in the display mode and the reference voltage source 973 in the power saving mode to the positive input terminal of the comparator 971. A negative input terminal of the comparator 971 has an electromotive voltage V
gen is supplied. Therefore, the comparator 9
The reference numeral 71 compares the electromotive voltage Vgen with the set voltage value Va or the set voltage value Vb, and when the electromotive voltage Vgen is lower than these (in the case of a large amplitude), it goes to a high level, and the electromotive voltage Vg
When en exceeds these values (in the case of a small amplitude), a comparison result signal which is at a low level is generated.

Next, the retriggerable monomulti 974 is
The signal is triggered by a rising edge generated when the comparison result signal rises from a low level to a high level, rises from a low level to a high level, and generates a signal that rises from a low level to a high level after a predetermined time has elapsed. The retriggerable monomulti 974 is configured to reset the measurement time and start a new time measurement when triggered again before the predetermined time has elapsed.

Next, the operation of the first detection circuit 97 will be described with reference to FIG.
This will be described with reference to FIG. FIG. 4 is a timing chart of the first detection circuit 97. FIG. 3A shows the electromotive voltage Vgen.
Is a half-wave rectified waveform by the diode 47. In this example, it is assumed that the set voltage values Va and Vb are set to the levels shown in FIG. If the current mode is the display mode, the switch SW1 selects the reference voltage source 972 and supplies the set voltage value Va to the comparator 971.
Then, the comparator 971 compares the set voltage value Va with the electromotive voltage Vgen shown in FIG.
Is generated. In this case, the retriggerable monomulti 974 rises from a low level to a high level in synchronization with the rising edge of the comparison result signal generated at time t1 (see FIG. 3C). Here, the delay time Td of the retriggerable monomulti 974 is shown in FIG.
Shown in In this case, since the time from the edge e1 to the next edge e2 is shorter than the delay time Td, the voltage detection signal S
v will maintain a high level.

On the other hand, if the current mode is the display mode, the switch SW1 selects the reference voltage source 973,
The set voltage value Vb is supplied to the comparator 971. In this example, since the electromotive voltage Vgen does not exceed the set voltage value Vb, no trigger is input to the retriggerable monomulti 974. Therefore, the voltage detection signal Sv maintains a low level. As described above, the first detection circuit 97 compares the set voltage value Va or Vb according to the mode with the electromotive voltage Vgen, thereby obtaining the voltage detection signal Sv.
Has been generated.

[1-3-2: Second Detecting Circuit] In FIG. 3, the second detecting circuit 98 includes an integrating circuit 981, a gate 9
82, a counter 983, a digital comparator 984, and a switch SW2. First, the integration circuit 981 includes a MOS transistor 2, a capacitor 3, a pull-up resistor 4, and an inverter circuit 5.
The electromotive voltage Vgen is connected to the gate of the MOS transistor 2, and the MOS transistor 2 repeats on and off operations by the electromotive voltage Vgen to control charging of the capacitor 3. If the switching means is constituted by MOS transistors, the integrating circuit 98 including the inverter circuit 5 is also provided.
Although 1 can be constituted by an inexpensive CMOS-IC, these switching elements and voltage detecting means may be constituted by bipolar transistors. The pull-up resistor 4 has a function of fixing the voltage value V3 of the capacitor 3 to the potential Vss during non-power generation and generating a leak current during non-power generation. This has a high resistance value of about several tens to several hundreds of MΩ, and can be constituted by a MOS transistor having a large on-resistance. The voltage value V3 of the capacitor 3 is determined by the inverter circuit 5 connected to the capacitor 3. Detection signal V
Output out. Here, the threshold value of the inverter circuit 5 is set to be a set voltage value Vbas considerably smaller than the set voltage value Vo used in the first detection circuit 97.

The gate 982 is supplied with the reference signal and the detection signal Vout supplied from the pulse synthesis circuit 22. Therefore, the counter 983 detects the detection signal Vout.
Counts the reference signal during the high level. This count value is supplied to one input of a digital comparator 983. Further, a set time value To corresponding to the set time is supplied to the other input of the digital comparator 983. Here, when the current mode is the display mode, the set time value Ta is supplied via the switch SW2, and when the current mode is the power saving mode, the set time value Tb is supplied via the switch SW2. It has become so. The switch SW2 is controlled by the set value switching unit 95. The digital comparator 984 outputs the comparison result as a power generation continuation time detection signal St in synchronization with the falling edge of the detection signal Vout. The power generation continuation time detection signal St goes high when the set time is exceeded, and goes low when the time falls below the set time.

Next, the operation of the second detection circuit 98 will be described with reference to FIG.
This will be described with reference to FIG. FIG. 5 is a timing chart for explaining the operation of the second detection circuit 98. When the power generation unit A starts generating the AC power shown in FIG. 5A, the power generation device 40 generates an electromotive voltage Vgen shown in FIG. When power generation starts and the voltage value of the electromotive voltage Vgen falls from Vdd to Vss, the MOS transistor 2 is turned on, and charging of the capacitor 3 starts. The potential of V3 is fixed to the Vss side by the pull-up resistor 4 during non-power generation, but starts to rise to Vdd when power generation occurs and the capacitor 3 starts charging. Next, the voltage of the electromotive voltage Vgen starts increasing to Vss, and when the MOS transistor 2 is turned off, the capacitor 3
Is stopped, but the potential of V3 shown in FIG. The above operation is repeated while power generation is continued, and the potential of V3 rises to Vdd and stabilizes. When the potential of V3 rises above the threshold value of the inverter circuit 5, the inverter circuit 5 '
Is switched from the low level to the high level, and power generation can be detected. The response time until power generation detection can be arbitrarily set by connecting a current limiting resistor, adjusting the value of the charging current to the capacitor 3 by changing the capability of the MOS transistor, or changing the capacitance value of the capacitor 3. .

When the power generation stops, the electromotive voltage Vgen becomes Vdd.
In order to stabilize at the level, the MOS transistor 2 remains off. Although the voltage of V3 is maintained for a while by the capacitor 3, the charge of the capacitor 3 is released by a slight leak current due to the pull-up resistor 4, so that V3 starts to gradually decrease from Vdd to Vss. When V3 exceeds the threshold value of the inverter circuit 5, the detection signal Vout, which is the output of the inverter circuit 5 ', switches from the high level to the low level, and it is possible to detect that power is not being generated (see FIG. 4D). This response time can be arbitrarily set by changing the resistance value of the pull-up resistor 4 and adjusting the leak current of the capacitor 3.

When the reference signal is gated by the detection signal Vout, the signal shown in FIG. 9E is obtained, and the counter 983 counts this signal. This count value is
The digital comparator 984 compares the value with the value corresponding to the set time at the timing T1. Here, if the high level period Tx of the detection signal Vout is longer than the set time value To, the power generation continuation time detection signal St changes from the low level to the high level at the timing T1 as shown in FIG. .

Now, the electromotive voltage Vgen and the detection signal Vout for the electromotive voltage Vgen due to the difference in the rotation speed of the power generation rotor 43 will be described. FIG. 6 is a conceptual diagram for explaining this. In particular, FIG.
FIG. 4B shows a case where the rotation speed of the power generation rotor 43 is low, and FIG. 4B shows a case where the rotation speed of the power generation rotor 43 is high. The voltage level and period (frequency) of the electromotive voltage Vgen change according to the rotation speed of the power generation rotor 43. That is, as the rotation speed increases, the electromotive voltage Vgen
Has a large amplitude and a short period. Therefore, the length of the output holding time (power generation continuation time) of the detection signal Vout changes according to the rotation speed of the power generation rotor 43, that is, the power generation intensity of the power generation device 40. That is, when the movement in FIG. 7A is small, the output holding time is ta, and when the movement in FIG. 7B is large, the output holding time is tb. The magnitude relationship between the two is that ta <t
b. Thus, the strength of the power generation of the power generation device 40 can be known from the length of the output holding time of the detection signal Vout.

[1-4: Operation of Timekeeping Apparatus] Next, a mode setting step of performing a mode switching process in the timekeeping apparatus 1 of this embodiment will be described. FIG. 7 is a flowchart showing the outline. First, in step 71, the current mode is determined. When the power is being saved, the stop time is counted using the time information storage unit 96 in step 74.
In step 75, the set values Vo and To of the voltage detection circuit 91 are set to the values Vb and Tb of the power saving mode. On the other hand, in the display mode, in step 72, the drive control section 24 controls the drive circuit 30 to generate a drive pulse and display the time. Then, in step 73, the set values Vo and T of the power generation state detection section 91 are set.
o is set to the display mode values Va and Ta.

Next, at step 76, the power generation level (electromotive voltage) is detected. If it is determined that there is an electromotive voltage even if it is minute, the power generation continuation time Tgen is counted up in step 77. Further, at step 78, the power generation continuation time Tgen is compared with the set time To. If it is determined in step 78 that the power generation continuation time Tgen has not reached the set time To, in step 79, the electromotive voltage Vgen is compared with the set value Vo. Then, when the electromotive voltage Vgen has reached the set value Vo, it is determined that power generation has been detected, and the process proceeds to step 80. In step 80, the mode is determined again. If the mode is not the power saving mode, the non-power generation time Tn is cleared in step 81, the process returns to step 71, and the time display is continued in step 72. On the other hand, in the power saving mode, the charging voltage VC of the power supply section B is determined in step 82, and if the battery is sufficiently charged, the process shifts from the power saving mode to the display mode in step 83 to cancel the power saving. When shifting to the display mode and re-displaying the time, as described above, the time display is fast-forwarded based on the stop time counted in the time information storage unit 96, and after returning to the current time, the normal time is displayed every one second. Hand operation is started. Thus, the user can return to the display mode and know the exact time displayed.

On the other hand, if no electromotive voltage is detected in step 76, or if the power generation continuation time Tgen has not reached the set time To and the electromotive voltage Vgen has not reached the set value Vo, it is determined that power generation has not been detected. The process proceeds to step 85 to determine the mode at that time. At this time, if no electromotive voltage is detected in step 76,
In step 84, the power generation continuation time Tgen is cleared.
If the power saving mode is selected in step 85, the process returns to step 71 to continue counting the stop time. In the display mode, the non-power generation time Tn is counted up in step 86, and it is determined in step 87 whether the predetermined non-power generation time continues. And the non-power generation time Tn
If has elapsed, the display mode is shifted to the power saving mode in step 88, and power saving is started. In step 88, the operations of the display drive circuit 24 and the drive circuit 30 are stopped to eliminate the power consumption of the motor 10, and the time information storage unit 96 starts counting the stop time.

In this way, the timekeeping device 1 of the present embodiment stops or restarts the time display depending on the presence or absence of power generation. As described above, the power generation device 40 of the present example is a system that uses the rotary weight 45 to capture the movement or vibration of the user's arm and generate power. Therefore, detection of power generation indicates that the timekeeping device 1 is worn on the user's arm or carried in a pocket or the like. For this reason, when power generation is detected, it is assumed that the timekeeping device 1 is carried and the display mode is set to display the time. On the other hand, when power generation is not detected, it is assumed that the timekeeping device 1 is not carried, and the power saving mode in which the time display is not performed can save energy stored in the large-capacity capacitor 48.

Further, in the timing device 1 of the present embodiment, the case where a predetermined electromotive voltage Vgen is detected and the case where a predetermined
When power generation is continuously performed, it is determined that power generation has been detected. Therefore, if the user enters the power saving mode when the user is not carrying it and power generation is accidentally induced due to vibration or some other reason, if the electromotive voltage is weak and the duration is short, it is not possible to shift to the display mode. Energy consumption can be prevented. On the other hand, since the set value Vo is set lower in the display mode than in the power saving mode, it is determined that power is generated if the electromotive voltage is obtained even if the electromotive voltage Vgen to be detected is somewhat lower. For this reason, the time display is continuously performed if the power is generated to some extent. In the display mode, the power generation continuation time T
Since the set time To of the gen is also set short, the time display is maintained as long as the power is generated even in a short time.

Further, in the timekeeping device 1 of the present embodiment, the non-power generation time Tn is measured, and if the non-power generation time does not reach the set time, the mode is not shifted to the power saving mode. Accordingly, the time display can be maintained even when the wristwatch is removed for a time period of about a conference, in addition to the case where the movement of the user stops for a short time and the power generation is not performed. In addition, the time may be continuously displayed regardless of whether it is left overnight or left. Alternatively, it is also possible to set the mode to shift to the power saving mode after removing it for about 5 minutes to save energy.

As described above, the timekeeping device 1 of the present embodiment can automatically determine whether to carry or not to carry based on the state of power generation. The function can be exhibited, and energy consumption can be suppressed without displaying the time when not carrying. Therefore, the power once charged in the large-capacity capacitor 48 can be effectively used. Even if the power is left for a long time, only the elapsed time is measured without displaying the display, and the display is displayed when the device is carried. Upon resuming, the current time can be restored and the correct time can be displayed.
Therefore, even without using a very large capacitor,
By incorporating a power generation device and a capacitor having an appropriate capacity in place of a battery, a small wristwatch or the like that can accurately measure time for a long time can be realized. In addition, since the capacity of the capacitor does not need to be so large, the start-up characteristic is good, and a timepiece can be realized in which the display is restarted immediately after the start of power generation and can be returned to the current time. Furthermore, the timekeeping device of the present example can refer to the time regardless of the surrounding conditions, for example, whenever it is carried in a dark place, so there is no inconvenience.

[1-5: Modification of First Embodiment] (1) In the above-described first embodiment, the power generation state detection unit 91 detects the power generation state based on the electromotive voltage Vgen from the power generation unit A. However, the power generation state may be detected based on the charging current flowing through the large-capacity capacitor 48 in the power supply unit B. In this case, as shown in FIG.
The current-to-voltage converter 100 may be provided before the detection circuit 97 and the second detection circuit 98. The current-voltage converter 100 includes a current detection resistor R and an operational amplifier OP that detects a potential difference between both ends of the current detection resistor R.

(2) In the first embodiment described above,
A first detection circuit 97 that compares the electromotive voltage Vgen with a set value Vo to determine whether power generation has been detected, and a set value Vo
An electromotive voltage Vgen higher than the voltage Vbas considerably smaller than
Is compared with the set value To to determine whether or not power generation has been detected.
8 is described based on the power generation state detection unit 91 having both of them, it is of course possible to determine the presence or absence of power generation using either one of the first and second detection circuits 97 and 98. is there.

[2. Second Embodiment] Next, a timing device according to a second embodiment of the present invention will be described. The timepiece of the second embodiment has the same configuration as the timepiece of the first embodiment, except for the configuration of the power generation state detection unit 91. The power generation frequency of the power generation unit A changes according to the power generation intensity. For example, the power generation frequency is low when the timing device 1 placed on the desk is slightly moved by some kind of momentum, but the power generation frequency increases when walking with the timing device 1 attached to the wrist of the arm. When the user charges the timekeeping device 1 by hand, the power generation frequency is further increased. The present embodiment focuses on this point, and detects the power generation state based on the power generation frequency.

FIG. 9 is a block diagram of a power generation state detecting section 91 'according to the second embodiment, and FIG. 10 is a timing chart thereof. The power generation state detection unit 91 'includes a comparator 971, a reference voltage source 972 for generating a constant voltage, a switch SW1, a timer 975, an SR flip-flop 976, a gate 977, a counter 978, and a digital comparator 979.

The reference voltage source 972 generates the set voltage value Va in the display mode, and is connected to the positive input terminal of the comparator 971. The electromotive voltage Vgen of the power generation unit A shown in FIG. 10A is supplied to the negative input terminal of the comparator 971. Therefore,
The comparator 971 converts the electromotive voltage Vgen to the set voltage value V
a, a comparison result signal is generated when the electromotive voltage Vgen is lower than these, and becomes high level, and when the electromotive voltage Vgen is higher than these, it becomes low level (FIG. 1).
0 (b)).

This comparison result signal is supplied to a set terminal of the SR flip-flop 976, and an output signal of the timer 975 is supplied to its reset terminal. The timer 975 is configured to start time measurement in synchronization with the rising of the output signal of the SR flip-flop 976, and to fall when a predetermined time has elapsed. Here, assuming that the measurement time of the timer is Ts, the output signal of the SR flip-flop 976 changes from the low level to the high level in synchronization with the rising edges e3 and e4 of the comparison result signal as shown in FIG. Then, after continuing the high level for the time Ts, the signal falls from the high level to the low level.

The gate 977 is an SR flip-flop 97
The logical product of the output signal of No. 6 and the comparison result signal is output. The counter 978 counts the output signal of the gate 977,
The count value Z is output to the digital comparator 979. The digital comparator 979 has a switch SW
2, the set values X1 and X2 are selectively supplied. The switch SW2 is controlled by the set value switching unit 95, and supplies the set value X1 to the digital comparator 979 in the display mode and the set value X2 in the power saving mode. The set value X1 corresponds to the power generation frequency f1 that can determine whether or not the mobile phone is in a normal mobile power generation state, and the set value X2 corresponds to the power generation frequency f2 that can determine whether it is the forced charging. Digital comparator 9
79 is configured to compare the count value Z of the counter 978 with the set value X1 or X2 at the falling edge of the gate 977.

If the current state is the power saving mode, a power generation state detection signal S indicating the power generation state is generated when the power generation frequency of the power generation unit A exceeds f2. Therefore,
In a normal mobile phone, the power saving mode is not canceled, and the mode is shifted from the power saving mode to the display mode only when the user performs a forced charging (hand gesture) with the intention of canceling the power saving mode. Therefore, the power saving mode is not released by lightly touching the timing device 1, and power is not wasted.

On the other hand, if the current state is the display mode, when the power generation frequency of the power generation unit A falls below f1, a power generation state detection signal S indicating a non-power generation state is generated. As described above, the power generation frequency f1 is set so as to be able to determine whether or not the mobile phone is in a normal mobile power generation state.
Can accurately detect a state where is not used, and can promptly shift from the display mode to the power saving mode. As a result, power is not wasted.

[3. Modifications] (1) In each of the embodiments described above, the timepiece that displays time using the step motor 10 is described as an example, but the present invention can also be applied to a timepiece that displays time using an LCD or the like. Of course. In this case, LC
The power consumed by D can be saved and the time can be continuously measured for a long time, and the correct current time can be displayed whenever necessary.

(2) In each of the above embodiments, 1
Although a clock device that displays hours, minutes, and seconds with one motor has been described as an example, the hours, minutes, and seconds can be displayed using a plurality of motors. In such a time-measuring device, it is also possible to change the timing at which the time-measurement display is stopped for each motor. For example, a second display with a fast hand movement speed is stopped earlier at a short non-power generation time to save energy. However, it is also possible to control to continue displaying the time as much as possible for hours and minutes.

(3) In each of the above-described embodiments, as the power generation device 40, an electromagnetic power generation that transmits the rotational motion of the rotary weight 45 to the rotor 43 and generates an electromotive force Vgen in the output coil 44 by the rotation of the rotor 43. Although the present invention employs a device, the present invention is not limited to this, for example, a power generating device that generates a rotating motion by a restoring force of a mainspring and generates an electromotive force by the rotating motion, or externally or self-excited. A power generation device that generates electric power by a piezoelectric effect by applying vibration or displacement to a piezoelectric body may be used.

(4) In each of the embodiments described above, the wristwatch-type timekeeping device 1 has been described as an example. However, the present invention is not limited to this, and the above-described power generation unit A, power supply unit B, control unit The electronic device to which C is applied may be a pocket watch or the like, other than a wristwatch. Further, the present invention can be applied to electronic devices such as calculators, mobile phones, portable personal computers, electronic organizers, portable radios, and portable VTRs. In this case, a power consuming unit that operates using the power supplied from the power supply unit B is provided, and the power generation state of the power generation unit A is detected by the power generation state detection unit 91, and based on the detection result, The control unit C may switch between the power saving mode in which the operation of the consuming unit is stopped and the operation mode in which the power consuming unit is operated. In these electronic devices, the operation mode refers to a state in which the device is in use (for example, in the case of a mobile phone, a state in which a telephone function can be used), and the power saving mode refers to a state in which the device is not in use and Refers to a state where AC power generation can be detected.
In addition, when a display unit such as a liquid crystal display panel is installed,
Usually, it is in the display state in the operation mode, and is in the non-display state in the power saving mode.

(5) In each of the above embodiments, when shifting from the power saving mode to the display mode, the user
It is necessary to charge the timekeeping device 1 by hand.
In this case, a larger amount of power is generated as compared to a case where the timekeeping device 1 is carried and a daily life is carried. For this reason, the electromagnetic noise level generated by the power generation device 40 is higher than that in a normal portable operation. Then, the time display may be inaccurate due to the influence of the electromagnetic noise on the stepping motor 10. Therefore, a forcible power generation state due to a hand shake may be detected, and in this case, a wide drive pulse may be generated by the drive unit E. Thus, even if the electromagnetic noise level of the power generation device 40 increases, the stepping motor 10 can be reliably operated by the wide driving pulse. Further, when the timekeeping device 1 is forcibly charged by hand, the charging current is large, and the internal resistance of the large-capacity capacitor 48 causes a large fluctuation in the power supply voltage, which may adversely affect the circuit operation. Therefore, a forced power generation state due to a hand shake may be detected, and in this case, both ends of the power generation stator 42 may be short-circuited. This makes it possible to suppress fluctuations in the power supply voltage and reliably operate the circuit.

(6) The first detection circuit 97, the second detection circuit 98 described in the first embodiment described above, and the power generation state detection unit 91 ′ described in the second embodiment are appropriately combined to determine the power generation state. You may make it detect. That is, the power generation state may be detected by any combination of the electromotive voltage Vgen and the power generation continuation time, the power generation continuation time and the power generation frequency, the power generation frequency and the electromotive voltage Vgen, and the electromotive voltage Vgen and the power generation continuation time and the power generation frequency. Further, the detection target may be an electromotive voltage, or may be a charging current as described in the modification of the first embodiment. The detection of the power generation state of the present invention is not limited to each embodiment, and may be performed by any one of detection by voltage, detection by current, detection by power generation continuation time, and detection by power generation frequency. Alternatively, the detection may be performed by appropriately combining a plurality of them.

(7) The first detection circuit 97, the second detection circuit 98 described in the first embodiment, and the power generation state detection unit 91 'described in the second embodiment serve as a reference for comparison. Although the set value is switched according to the current mode, a non-power generation state (non-portable state), a portable state, and a forced power generation state may be detected by comparing with a plurality of set values.

(8) In each of the embodiments described above, the reference potential (GND) is set to Vdd (high potential side).
Of course, the reference potential (GND) may be set to Vss (low potential side). In this case, the set voltage value Vo
And Vbas indicate the potential difference from the detection level set on the high voltage side with respect to Vss.

(9) In each of the above-described embodiments, the transition from the display mode to the power saving mode is performed by detecting the power generation state. However, the present invention is not limited to this. May be executed based on For example, a button disposed on the exterior of the timing device 1 or an operation of a crown or the like may be detected, and the mode may be shifted from the display mode to the power saving mode based on the detection result. In this case, the mode can be promptly shifted to the power saving mode by a user's intentional operation, so that the user can save power even when the user is simply carrying the device without having to know the time display. As a result,
The power consumption can be further reduced. (1
0) In each of the above-described embodiments, the power supply unit B performs half-wave rectification on the AC voltage supplied from the power generation unit A. However, the present invention is not limited to this, and a unit that performs full-wave rectification may be used. Of course.

[0066]

As described above, according to the present invention, the electronic device includes the power generation unit that converts kinetic energy into electric energy to generate AC power. Is detected, it can be determined whether or not the electronic device is carried. The power saving mode and the operation mode can be switched according to the power generation state. For this reason, when not in the power generation state, the operation of the electronic device is stopped, and wasteful power consumption can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of a timing device 1 according to a first embodiment of the present invention.

FIG. 2 is a functional block diagram of a control unit C and its peripheral configuration according to the embodiment.

FIG. 3 is a circuit diagram of a power generation state detection unit 91 according to the embodiment.

FIG. 4 is a timing chart for explaining an operation of the first detection circuit 97 according to the same embodiment.

FIG. 5 is a timing chart for explaining an operation of a second detection circuit 98 according to the same embodiment.

FIG. 6 shows an electromotive voltage Vgen and an electromotive voltage Vge due to a difference in rotation speed of the power generation rotor 43 in the embodiment.
FIG. 7 is a conceptual diagram for explaining a detection signal Vout for n.

FIG. 7 is a flowchart showing an outline of a mode setting step in the timepiece 1 according to the embodiment.

FIG. 8 shows a power generation state detection unit 9 according to a modification of the embodiment.
1 is a block diagram showing a configuration of FIG.

FIG. 9 is a block diagram of a power generation state detection unit 91 ′ according to a second embodiment of the present invention.

FIG. 10 is a timing chart of a power generation state detection unit 91 ′ according to the same embodiment.

[Explanation of symbols]

 1. Timing device A: Power generation unit B: Power supply unit C: Control unit D: Driving unit E: Hand movement mechanism 91: Power generation state detection unit 40: Power generation device 45: Rotating weight 46 ... Speed-up gear 47 Diode 48 Large-capacity capacitor 90 Mode setting part 95 Setting value switching part 97 First detection circuit 98 Second detection circuit

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroshi Yabe 3-3-5 Yamato, Suwa-shi, Nagano Seiko Epson Corporation (72) Inventor Joji Kitahara 3-5-35 Yamato, Suwa-shi, Nagano Seiko-Epson (72) Inventor Hiroyuki Kojima 3-5-5 Yamato, Suwa-shi, Nagano Seiko Epson Corporation (72) Inventor Noriaki Shimura 3-5-35 Yamato, Suwa-shi, Nagano Seiko Epson Corporation F Term (reference) 2F084 AA07 BB01 GG04 JJ01 KK03 5H590 AA02 CB01 CC02 CD01 CE05 EA08 HA28 KK03

Claims (29)

[Claims] 1. A portable electronic device, comprising: a power generation unit that converts kinetic energy into electric energy to generate AC power; a power supply unit that rectifies the generated AC power and stores the power; A power consuming unit that operates using electric power, a power generation state detection unit that detects a power generation state of the power generation unit, and a power saving mode that stops operation of the power consumption unit based on a detection result of the power generation state detection unit. An electronic device, comprising: a control unit that controls switching between an operation mode for operating the power consumption unit and an operation mode for operating the power consumption unit. 2. The electronic device according to claim 1, wherein the power generation state detection unit detects a power generation state based on an electromotive voltage of the power generation unit. 3. The electronic device according to claim 2, wherein the power generation state detection unit compares the electromotive voltage of the power generation unit with a plurality of set voltage values, and detects a power generation state according to a comparison result. machine. 4. The power generation state detection unit selects the plurality of set voltage values according to a current mode, and compares the electromotive voltage of the power generation unit with the selected set voltage value.
The electronic device according to claim 3, wherein a power generation state is detected. 5. The power generation state detection unit sets a set voltage value used for mode switching from a power saving mode to an operation mode higher than a set voltage value used for switching from an operation mode to a power saving mode. The electronic device according to claim 4. 6. The electronic device according to claim 1, wherein the power generation state detection unit detects a power generation state based on a charging current of the power supply unit. 7. The electronic device according to claim 6, wherein the power generation state detection unit compares a charging current of the power supply unit with a plurality of set current values, and detects a power generation state based on a comparison result. machine. 8. The power generation state detection unit selects the plurality of set current values according to a current mode, and compares the charge current of the power supply unit with the selected set current value to determine the power generation state. The electronic device according to claim 7, wherein the detection is performed. 9. The power generation state detection unit sets a set current value used for mode switching from the power saving mode to the operation mode higher than a set current value used for switching from the operation mode to the power saving mode. The electronic device according to claim 8. 10. The electronic apparatus according to claim 1, wherein the power generation state detection unit detects a power generation state based on a power generation continuation time of the power generation unit. 11. The power generation state detection unit includes: a switching unit configured to perform switching in accordance with a cycle of the AC power generated by the power generation unit; a capacitance element configured to store electric charge in accordance with a switching operation performed by the switching unit; A discharge unit that is inserted into a discharge path of the capacitance element and discharges the charge stored in the capacitance element; and a measurement unit that measures a period during which the voltage of the capacitance element exceeds a predetermined value and measures the power generation continuation time. The electronic device according to claim 10, further comprising: 12. The power generation state detection unit compares the power generation continuation time of the power generation unit with a plurality of set time values, and detects a power generation state based on the comparison result.
12. The electronic device according to 0 or 11. 13. The power generation state detection unit selects the plurality of set time values in accordance with a current mode, and compares the power generation continuation time of the power generation unit with the set time value. 2. The method according to claim 1, wherein
3. The electronic device according to 2. 14. The power generation state detection unit sets a set time value used for mode switching from the power saving mode to the operation mode longer than a set time value used for switching from the operation mode to the power saving mode. The electronic device according to claim 13. 15. The electronic device according to claim 1, wherein the power generation state detection unit detects a power generation state based on a power generation frequency of the power generation unit. 16. The power generation state detection unit counts the number of the peaks of the electromotive voltage during a period from when the electromotive voltage of the power generation unit exceeds a set voltage value to when a set time has elapsed, and The electronic device according to claim 15, wherein a power generation frequency of the power generation unit is detected. 17. The power generation state detection unit according to claim 1, wherein the power generation frequency of the power generation unit is compared with a plurality of set frequency values, and the power generation state is detected based on the comparison result.
The electronic device according to 5 or 16. 18. The power generation state detecting unit selects the plurality of set frequency values in accordance with a current mode, and compares the power generation frequency value of the power generation unit with the set frequency value to set the power generation state. The electronic device according to claim 17, wherein 19. The power generation state detection unit according to claim 1, wherein the set frequency value used for mode switching from the power saving mode to the operation mode is
19. The electronic device according to claim 18, wherein the frequency is set higher than a set frequency value used for switching from the operation mode to the power saving mode. 20. The electronic device according to claim 1, wherein the power generation unit includes a rotating weight that performs a turning motion and a power generating element that generates an electromotive force by the rotating motion of the rotating weight. 21. An electric power generating unit comprising: an elastic member to which a deforming force is applied; rotating means for performing a rotational movement by a restoring force of the elastic member to return to an original shape; The electronic device according to claim 1, further comprising: a power generating element configured to generate power. 22. The power generation unit, when a displacement is applied,
The electronic device according to claim 1, further comprising a piezoelectric element that generates an electromotive force by a piezoelectric effect. 23. The electronic device according to claim 1, wherein the power consuming unit is a time display unit that displays time using power supplied from the power supply unit. The operation mode is a display mode in which the time is displayed on the time display unit. 24. A power generation unit for converting kinetic energy into electric energy to generate AC power, a power supply unit for rectifying the generated AC power and storing the power, and operating using the power supplied from the power supply unit. A power saving mode for detecting an electric power generation state of the power generation unit, and stopping the operation of the power consumption unit based on a result of the detection. Controlling a switching of an operation mode for operating a unit. 25. The power generation unit according to claim 24, wherein the power generation state of the power generation unit is detected by comparing an electromotive voltage of the power generation unit with a set voltage value, and detecting the power generation state according to the comparison result. Control method of electronic equipment. 26. The power generation unit according to claim 24, wherein the power generation state of the power generation unit is detected by comparing a charging current of the power supply unit with a set current value, and detecting a power generation state according to the comparison result. Control method of electronic equipment. 27. The power generation state of the power generation unit is detected by comparing a power generation continuation time value of the power generation unit with a set time value, and detecting a power generation state according to a comparison result. The control method of the electronic device according to the above. 28. The power generation state of the power generation unit is detected by comparing a power generation frequency value of the power generation unit with a set frequency value, and detecting a power generation state according to a comparison result. Electronic device control method. 29. Any one of claims 24 to 28
In the electronic device control method according to the paragraph, the power consumption unit is a time display unit that displays the time using the power supplied from the power supply unit, the operation mode, the time display unit A control method for a timepiece, wherein the display mode is a time display mode.