JP3525897B2 - Electronic device and control method of electronic device - Google Patents

Description

Detailed Description of the Invention

TECHNICAL FIELD The present invention relates to an electronic device and a method for controlling the electronic device, and more particularly, to an electronic device and a method for controlling the electronic device in which an operation mode of the electronic device can be switched between a drive mode and a power saving mode.

BACKGROUND ART In recent years, there is an electronic wristwatch as an example of electronic equipment, and a power supply means is built in this wristwatch, and this power supply means is generated by a power generator having a rotary weight and the power generator. It is generally configured by a storage means (a large-capacity capacitor) that stores electric energy. And, this kind of electronic timepiece operates the timepiece for a long time without replacing the battery by displaying the time on the time display unit using the electric energy discharged from the capacitor. .

Since the electronic timepiece having the power supply means having the power generator in this way supplies stable electric energy for a long time, the power generator is in a non-power generation state for a predetermined time or longer or in a non-portable state. In the prior art, these states are detected and the operation mode of the electronic timepiece is switched from a drive mode (display mode) that displays time to a power saving mode that does not display time. Here, in the power saving mode of the electronic timepiece, the time is not displayed,
The electric energy is supplied only to the control circuit for counting the current time. On the other hand, in the display mode (drive mode) in which normal time display is performed, electric energy is supplied to the control circuit, and in the case of, for example, an analog timepiece, electric energy is also supplied to the drive circuit that drives the hands. Also, when the user attaches the electronic timepiece in the power saving mode to the wrist and starts power generation again, the power saving mode is switched to the display mode, and the time display unit displays the current time based on the data stored in the counter. I am trying to return to. For example, in an analog timepiece using a pointer, the pointer is fast-forwarded to quickly return to the current time.

However, when the electronic timepiece continues in the power saving mode (non-power generation time) for a long time, the electric energy stored in the large capacity capacitor is gradually consumed, and almost all the electric energy remains in the large capacity capacitor. If not, not only is it impossible to return to the current time, but it also takes time for the time display unit itself to store the electrical energy required for restarting, and the startability of the electronic timepiece is reduced. There was a risk of getting worse.

The present invention has been made in view of the above-mentioned circumstances, and reduces the consumption of electric energy when the electric energy required for returning to the present time does not remain in the power supply means in the power saving mode. It is an object of the present invention to provide an electronic device and a method for controlling the electronic device, which can hold the electric energy of the power supply means and quickly restart the driven means.

DISCLOSURE OF THE INVENTION The first aspect of the present invention is a rechargeable power supply unit for supplying electric energy, and a drive control unit which operates by electric energy supplied from the power supply unit and outputs a drive signal. And a driven portion driven by receiving the drive signal, and a mode for switching the operation mode of the driven portion between a drive mode for performing normal driving and a power saving mode based on a preset first condition. It is determined that the amount of electric energy stored in the power source unit becomes smaller than the predetermined amount of electric energy based on the preset second condition when the power saving mode is set by the switching unit and the mode switching unit. In this case, an operation stop unit for stopping the operation of the drive control unit is provided.

According to a second aspect of the present invention, in the first aspect of the present invention, the operation stopping section supplies electric energy from the power supply section to the drive control section when stopping the operation of the drive control section. It is characterized by stopping.

According to a third aspect of the present invention, in the first aspect of the present invention, the drive control unit is operated by electric energy supplied from the power supply unit and outputs a control signal, and a power supply unit supplies the control signal. And a drive circuit that receives a control signal and outputs a drive signal to a driven part, the mode switching part supplies the control circuit and the drive circuit with the electric energy in the drive mode. However, in the power saving mode, electric energy is supplied only to the control circuit.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the power source section stores a power generation section for converting external energy into electric energy and an electric energy supplied from the power generation section, And a power storage unit for supplying electric energy to the drive control unit.

A fifth aspect of the present invention is characterized in that, in the fourth aspect of the present invention, in the fourth aspect of the present invention, the power storage unit is constituted by a secondary power source or a capacitor.

According to a sixth aspect of the present invention, in the fourth aspect of the present invention, a power generation state detection unit for detecting whether or not the power generation unit is in a power generation state is provided, and the first condition is that the power generation state is It is characterized by whether or not the power generation unit is in a power generation state by the detection unit.

According to a seventh aspect of the present invention, in the sixth aspect of the present invention, the power generation state detecting section determines whether or not the amount of electric energy output from the power generating section exceeds a determination energy amount. And a power generation time determination unit that determines whether or not the duration time during which the electrical energy amount exceeds the determination energy amount exceeds the determination time value by the energy amount determination unit.

According to an eighth aspect of the present invention, in the first aspect of the present invention, a portable state detecting section for detecting whether or not the electronic device is in the portable state is provided, and the first condition is that the electronic device is driven. When switching the operation mode of the unit from the drive mode to the power saving mode, the portable state detection unit detects that the electronic device is in the non-portable state, and the electronic device remains in the non-portable state for a predetermined time. When switching the operation mode of the driven part from the power saving mode to the driving mode,
It is characterized in that the electronic device is switched from the non-portable state to the portable state by the portable state detection unit.

According to a ninth aspect of the present invention, in the first aspect of the present invention, a voltage detecting section for detecting the voltage of the power source section is provided, and the second condition is the voltage of the power source section detected by the voltage detecting section. Is below a predetermined voltage.

According to a tenth aspect of the present invention, in the first aspect of the present invention, an electric energy amount detecting section for detecting the amount of electric energy supplied from the power source section is provided, and the second condition is that the electric energy is When the amount of electric energy that can be supplied by the power supply unit detected by the energy amount detection unit becomes smaller than the predetermined amount of electric energy required to return the operation mode of the driven unit from the power saving mode to the driving mode. It is characterized by being.

According to an eleventh aspect of the present invention, in the fourth aspect of the present invention, a power generation state detecting section for detecting whether or not the power generation section is in a power generation state is provided, and further, an operation stopping section is used to drive the drive control section. When the operation is in the stopped state, an operation start unit that starts the operation of the drive control unit when the preset third condition is satisfied is provided, and the third condition is that the power generation state detection unit determines the power generation unit. This is the case when the power generation has started.

The twelfth aspect of the present invention is the eleventh aspect of the present invention.
In this mode, the power generation under the third condition is started when the amount of electric energy output from the power generation unit exceeds the restartable energy amount and this state is continued for a predetermined time.

According to a thirteenth aspect of the present invention, in the first aspect of the present invention, a portable state detecting section for detecting whether or not the electronic device is in a portable state is provided, and a drive control section is further provided by an operation stopping section. When the operation of is in a stopped state, an operation start unit that starts the operation of the drive control unit based on a preset third condition is provided, and the operation start unit uses the portable state detection unit as the third condition. It is characterized in that it determines whether the electronic device is switched from a non-portable state to a portable state.

The fourteenth aspect of the present invention is the thirteenth aspect of the present invention.
In the aspect, the switching from the non-carrying state to the carrying state is
It is characterized in that it is carried out when the time in the carrying state continues for a predetermined time after switching from the non-carrying state to the carrying state.

A fifteenth aspect of the present invention is based on the first aspect of the present invention, in which an external operation input section operated by a user from outside is provided, and a mode switching section is provided based on an operation status of the external operation input section. The feature is that the drive mode and the power saving mode are switched.

According to a sixteenth aspect of the present invention, in the first aspect of the present invention, when an external operation input section operated by the user from the outside is provided and the operation of the drive control section is stopped by the operation stop section. In addition, an operation starting section for starting the operation of the drive control section based on the operation status of the external operation input section is provided.

A seventeenth aspect of the present invention is characterized in that, in any one of the first to sixteenth aspects of the present invention, the driven section has a time display section for displaying a time.

The eighteenth aspect of the present invention is the seventeenth aspect of the present invention.
In the above aspect, the drive control unit includes a current time restoration unit that performs a restoration operation to restore the time display to the current time when the operation mode of the driven unit is switched from the power saving mode to the driving mode by the mode switching unit. It is characterized by that.

The nineteenth aspect of the present invention is the eighteenth aspect of the present invention.
In the above aspect, the predetermined amount of electric energy is set to the amount of electric energy required to return from the power saving mode to the current time by using the current time returning unit.

The twentieth aspect of the present invention is the eighteenth aspect of the present invention.
In this mode, the amount of energy that can be returned is set to a minimum amount that enables time display using the time display unit by starting the operation of the drive control unit.

The twenty-first aspect of the present invention is the eighteenth aspect of the present invention.
In the aspect, the time display unit has a pointer for time display and a motor for moving the pointer, and the current time returning unit uses the motor to move the pointer at a high hand movement speed that is higher than the normal hand movement speed. The feature is to restore.

A twenty-second aspect of the present invention is the drive circuit according to the first aspect of the present invention, wherein the drive control section is operated by electric energy supplied from the power supply section and outputs a control signal, and the power supply section supplies the control signal. And a drive circuit that receives a control signal and outputs a drive signal toward a driven part, the control circuit including an oscillation circuit that generates a basic pulse, and the operation stop part includes The feature is that the operation of the oscillation circuit is stopped.

The twenty-third aspect of the present invention is the twenty-second aspect of the present invention.
In the above aspect, the operation stop part stops supplying electric energy to the oscillation circuit.

A twenty-fourth aspect of the present invention is the drive circuit according to the first aspect of the present invention, in which the drive control section is operated by electric energy supplied from the power supply section and outputs a control signal, and the power supply section supplies the control signal. And a drive circuit that receives a control signal and outputs a drive signal to a driven part, the control circuit outputting the basic pulse and the oscillation circuit outputting the basic pulse. A frequency dividing circuit for dividing the basic pulse, and the operation stopping unit is
The feature is that the operation of the oscillation circuit or the frequency dividing circuit is stopped.

The twenty-fifth aspect of the present invention is the twenty-fourth aspect of the present invention.
In the above aspect, the operation stopping unit includes a constant voltage generating circuit that generates a constant voltage lower than the power supply voltage in order to drive at least one of the oscillation circuit and the frequency dividing circuit. It is characterized by stopping the supply of electric energy.

A twenty-sixth aspect of the present invention is a chargeable power supply unit for supplying electric energy, a drive control unit which is operated by the electric energy supplied from the power supply unit and outputs a drive signal, and the drive control unit. A method of controlling an electronic device having a driven unit driven by receiving a drive signal output from the unit, wherein an operating mode of the driven unit is set based on a preset first condition. And a power saving mode, and when the power saving mode is performed by the mode switching step, the amount of electric energy stored in the power supply unit based on the preset second condition is lower than the predetermined amount of electric energy. And a step of stopping the operation of the drive control unit when it is determined that That.

The 27th aspect of the present invention is the 26th aspect of the present invention.
In one aspect, the power supply unit includes a power generation device that converts external energy into electric energy, and a power storage device that stores the electric energy supplied from the power generation device and supplies the electric energy to the drive control unit. A power generation state detection step of determining whether the device is in a power generation state,
The first condition is characterized by whether or not the power generation device is in a power generation state in the power generation state detection step.

The 28th aspect of the present invention relates to the 27th aspect of the present invention.
In the power generation state detection step, the energy amount determination step of determining whether or not the amount of electric energy output from the power generation device exceeds the determination energy amount, and the electrical energy amount is determined by the energy amount determination step. And a power generation time determining step of determining whether or not the continuation time exceeding the amount exceeds the judgment time value.

The 29th aspect of the present invention is the 26th aspect of the present invention.
In the aspect, there is a portable state detecting step of detecting whether or not the electronic device is in a portable state, and the first condition is that when the operation mode of the driven unit is switched from the drive mode to the power saving mode, The portable state detection step detects that the electronic device is in the non-portable state, and the electronic device is in the non-portable state for a predetermined period of time. The operation mode of the drive unit is driven from the power saving mode. It is characterized in that the mode is switched from the non-carried state to the carried state in the carrying state detecting step.

The 30th aspect of the present invention is the 26th aspect of the present invention.
In the above aspect, there is provided an electric energy amount detecting step of detecting an amount of electric energy supplied from the power supply unit, and the second condition is the electric energy which can be supplied by the power supply unit detected by the electric energy amount detecting step. Quantity
It is characterized in that the operation mode of the driven unit is smaller than a predetermined amount of electric energy required to return from the power saving mode to the driving mode.

The 31st aspect of the present invention is the 26th aspect of the present invention.
In one aspect, the power supply unit includes a power generation device that converts external energy into electric energy, and a power storage device that stores the electric energy supplied from the power generation device and supplies the electric energy to the drive control unit. A power generation state detection step of detecting whether or not the device is in a power generation state,
Further, when the operation of the drive control unit is stopped by the operation stop step, an operation start step of starting the operation of the drive control unit based on a preset third condition is provided. The present invention is characterized in that it is a case where the power generation device detects that power generation has started in the state detection step.

The 32nd aspect of the present invention is the 26th aspect of the present invention.
In one aspect, the power supply unit includes a power generation device that converts external energy into electric energy, and a power storage device that stores the electric energy supplied from the power generation device and supplies the electric energy to the drive control unit. The electronic device has a portable state detecting step of detecting whether or not the portable apparatus is in a portable state, and when the operation of the drive control unit is in a stopped state by the operation stopping step, based on a third preset condition. An operation starting step for starting the operation of the drive control unit is provided, and the third condition is that the electronic device is switched from the non-portable state to the portable state by the portable state detecting step.

(Best Mode for Carrying Out the Invention) Next, a preferred embodiment of the present invention will be described with reference to the drawings. [1] Schematic Configuration FIG. 1 shows a schematic configuration of an electronic timepiece 1 according to an embodiment of the present invention. The electronic timepiece 1 is a wristwatch, and the user uses the belt connected to the main body of the device by winding the belt around the wrist.

The electronic timepiece 1 according to the present embodiment rectifies the AC voltage output from the power generation section A for generating AC power and rectifies the AC voltage and stores the boosted voltage to supply electric energy to each component. Power source unit B, a power generation state detection unit 91 (see FIG. 2) that detects the power generation state of the power generation unit A, and a control circuit 23 that controls the entire apparatus based on the detection result output from the power generation state detection unit 91. And a second hand movement mechanism CS that drives the second hand 55 using the stepping motor 10.
From the control circuit 23, an hour and minute hand moving mechanism CHM that drives the minute hand and the hour hand using a stepping motor, a second hand driving unit 30S that receives a control signal output from the control circuit 23, and drives the second hand moving mechanism CS. The operation mode of the hour / minute hand driving unit 30HM that drives the hour / minute hand movement mechanism CHM in response to the output control signal and the operation mode of the electronic timepiece 1 is changed from the time display mode to the calendar correction mode, the time correction mode, or forcibly the power saving mode described later. An external input device 100 (see FIG. 2) that performs an instruction operation for shifting is provided and is generally configured.

Here, the control circuit 23 supplies power to the control circuit 23 and the driving units 30S and 30HM (driving circuits) of the fingering mechanisms CS and CHM in accordance with the power generation state of the power generation unit A to display the time. The display mode (operation mode) to be performed and the power saving mode in which the power supply to the second hand movement mechanism CS and the hour and minute hand movement mechanism CHM are stopped and only the control circuit 23 is supplied with power are switched. In addition, the control circuit 23
Then, the user holds the electronic timepiece 1 in his hand and shakes it to generate electric power, and when it is detected that a predetermined generated voltage is exceeded, the power saving mode is switched to the display mode.

[2] Detailed Configuration Each component of the electronic timepiece 1 will be described below. The control circuit 23 will be described later using functional blocks.

[2.1] Power Generation Section First, the power generation section A will be described. The power generation unit A includes a power generation device 40, a rotary weight 45, and a speed increasing gear 46. The power generation device 40 includes a power generation rotor 43.
Rotates inside the power generation stator 42, and
An electromagnetic induction type AC power generation device capable of supplying the electric power induced in the power generation coil 44 connected to 2 to the outside is adopted. The rotary weight 45 also functions as a means for transmitting kinetic energy to the power generation rotor 43. The movement of the rotary weight 45 is transmitted through the speed increasing gear 46 to the power generating rotor 4
3 is transmitted. In the wristwatch type electronic timepiece 1, the rotary weight 45 is configured to be able to swivel in the device by capturing the movement of the user's arm and the like, and uses external energy related to the life of the user to generate power. , The electronic timepiece 1 is driven by using the electric power.

[2.2] Power Supply Unit Next, the power supply unit B will be described. The power supply unit B uses a limiter circuit LM for preventing an excessive voltage from being applied to a circuit in a subsequent stage, and a known Schottky diode, a silicon diode, a switching element such as a parasitic diode or a transistor of a MOSFET incorporated in an IC. Rectifying circuit 47 such as a half-wave rectifying circuit or a full-wave rectifying circuit including active elements, and a large-capacity capacitor 48.
A (high-capacity secondary power supply) and a step-up / down circuit 49 are provided. The step-up / down circuit 49 includes a plurality of capacitors 49a, 49a.
b and 49c, the charging voltage Vc of the large-capacity capacitor 48 that is input is received, and multi-step step-up and step-down are performed to output the power supply voltage Vss that is a low potential side voltage. Then, the step-up / down circuit 49 steps up / down the charging voltage Vc to the power supply voltage Vss by the control signal φ11 output from the control circuit 23, and the power supply voltage Vs.
s is supplied to the Vss driving unit 23A of the control circuit 23, the pulse synthesizing circuit 22, the second hand driving unit 30S, and the hour / minute hand driving unit 30HM. Here, the power supply unit B takes Vdd (high potential side voltage) as the reference potential (GND) and generates Vss (low potential side voltage) as the power supply voltage.

[2.3] Hand movement mechanism Next, the hand movement mechanism CS and CHM will be described. [2.3.1] Second hand movement mechanism First, the second hand movement mechanism CS will be described. Here, the stepping motor 1 used in the second hand movement mechanism CS
0 is also referred to as a pulse motor, a stepping motor, a digital motor, or the like, and is often used as an actuator of a digital control device, and the stepping motor 10 is driven by a pulse signal. In recent years, stepping motors of this type, which are small and lightweight, have been widely used as actuators for small electronic devices or information devices suitable for carrying. In addition, as such electronic devices, an electronic timepiece, a time switch, a chronograph, etc. are representative.

The stepping motor 10 of this embodiment is
The second hand drive unit 30S includes a drive coil 11 that generates a magnetic force by a drive pulse, a stator 12 that is excited by the drive coil 11, and a rotor 13 that is rotated by a magnetic field that is excited inside the stator 12. There is.

The rotor 13 is of the PM type (permanent magnet rotating type) having a disk-shaped two-pole permanent magnet, and the stator 12 has different magnetic poles due to the magnetic force generated in the drive coil 11. A magnetic saturation part 17 generated in each of the phases (poles) 15 and 16 around 13 is provided. Further, in order to define the rotation direction of the rotor 13, the inner notch 1 is provided at an appropriate position on the inner circumference of the stator 12.
8 is provided to generate a cogging torque and stop the rotor 13 at an appropriate position.

The rotation of the rotor 13 by the stepping motor 10 is caused by the second intermediate wheel 5 meshed with the rotor 13.
A train wheel 50 composed of 1 and a second wheel (second indicating wheel) 52 is transmitted to a second hand 55, and the second hand 55 displays a second.

[2.3.2] Hour-Minute Hand Movement Mechanism Next, the hour-minute hand movement mechanism CHM will be described. The stepping motor 60 used in the hour and minute hand moving mechanism CHM is
It has almost the same configuration as the stepping motor 10. The stepping motor 60 of the present embodiment includes a drive coil 61 that generates a magnetic force by a drive pulse supplied from the hour / minute hand drive unit 30HM, a stator 62 that is excited by the drive coil 61, and is further excited inside the stator 62. A rotor 63 that is rotated by a magnetic field.

The rotor 63 is of the PM type (permanent magnet rotating type) having a disk-shaped two-pole permanent magnet. Further, the stator 62 is provided with a magnetic saturation portion 67 in which different magnetic poles due to the magnetic force generated in the drive coil 61 are generated in respective phases (poles) 65 and 66 around the rotor 63.

Further, in order to define the rotating direction of the rotor 63, the inner notch 6 is provided at an appropriate position on the inner circumference of the stator 62.
8 is provided to generate a cogging torque and stop the rotor 63 at an appropriate position. The rotation of the rotor 63 of the stepping motor 60 is caused by rotation of the fourth wheel 71, the third wheel 72, the second wheel (minute indicator wheel) 73, the rear wheel 74 and the hour wheel (hour indicator wheel) meshed with the rotor 63. ) 75 train wheel 70 transmits to each needle.
A minute hand 76 is connected to the center wheel & pinion 73, and an hour hand 77 is connected to the hour wheel 75. The hour and minute are displayed by these respective hands in conjunction with the rotation of the rotor 63.

The train wheel 70 has a transmission system (for example, a calendar) for displaying a date (calendar) not shown.
In the case of displaying the date, it is of course possible to connect a cylinder intermediate wheel, a date driving intermediate wheel, a date driving wheel, a date wheel, etc. In this case, a calendar correction train wheel (for example, a first calendar correction transmission vehicle, a second calendar correction transmission vehicle, a calendar correction vehicle,
An additional date wheel, etc.) may be provided.

[2.4] Second hand driving unit and hour / minute hand driving unit Next, the second hand driving unit 30S and the hour / minute hand driving unit 30HM will be described. Here, since the second hand drive unit 30S and the hour / minute hand drive unit 30HM have the same configuration, the second hand drive unit 3
Only 0S will be described with reference to FIG. Here, the second hand drive unit 30S supplies various drive pulses to the stepping motor 10 under the control of the control circuit 23.

The second hand drive unit 30S includes a P-channel type transistor 33a and an N-channel type transistor 32a, and a P-channel type transistor 33b and an N-channel type transistor 32 which are connected in series.
The second hand driving unit 30S includes a bridge circuit configured by b, and the second hand driving unit 30S includes rotation detecting resistors 35a and 3b connected in parallel with the transistors 33a and 33b, respectively.
5b and sampling P-channel transistors 34a and 34b for supplying a chopper pulse to these resistors 35a and 35b. As a result, the second hand driving unit 30S causes the transistors 32S to
By supplying control pulses having different polarities and pulse widths from the control circuit 23 to the respective gate electrodes of a, 32b, 33a, 33b, 34a and 34b at different timings, drive pulses having different polarities are supplied to the drive coil 11. Alternatively, a detection pulse for exciting the induced voltage for detecting the rotation of the rotor 13 and for detecting the magnetic field is supplied.

[2.5] Control Circuit Next, the configuration of the control circuit 23 will be described with reference to FIG. 2. The functional block diagram of FIG.
And its peripheral configuration. Here, the control circuit 23
Includes a pulse synthesizing circuit 22, a mode setting unit 90, a time information storage unit 96, a drive control circuit 24, and the like. Further, the mode setting unit 90, the time information storage unit 96, the drive control circuit 24 and the like are chipped by the Vss drive unit 23A driven by the power supply voltage Vss, and the Vss drive unit 23A has a power supply voltage of the step-up / down circuit 49. Vss is supplied. further,
The pulse synthesizing circuit 22 includes a constant voltage generating circuit (not shown).
The constant voltage output from is supplied. The constant voltage generating circuit receives the power supply voltage Vss and generates a stable constant voltage.

The pulse synthesizing circuit 22 oscillates a reference pulse having a stable frequency by using a reference oscillation source 21 such as a crystal oscillator, a frequency dividing circuit for dividing the reference pulse, and a frequency dividing pulse. And a reference pulse are combined to generate pulse signals having different pulse widths and timings. Here, the pulse synthesis circuit 2
A constant voltage is supplied to 2, and the constant voltage is generated from a constant voltage circuit (not shown) that receives the power supply voltage Vss (charging voltage Vc) output from the power supply unit B and outputs the constant voltage. On the other hand, when the supply of the power supply voltage (constant voltage) is stopped, the pulse synthesis circuit 22 stops the generation of the pulse signal and stops the operation of the entire control circuit 23.

Next, the mode setting section 90 includes a power generation state detecting section 91, a set value switching section 95 for switching a set value used for detecting the power generation state, and a voltage for detecting the charging voltage Vc of the large capacity capacitor 48. A detection circuit 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 Vc, and a mode storage section 94 that stores the mode. There is. The power generation state detection unit 91 compares the electromotive voltage Vgen of the power generation device 40 with the set voltage value V0 to determine whether the power generation state is in the first detection circuit 97 and the first detection circuit 97. A second detection circuit 98 for determining a stable power generation state by comparing the time Tgen with a set time value T0 by setting a time during which the power generation device 40 is in a power generation state by the circuit 97 as a power generation duration time Tgen. ing.

Here, a specific circuit configuration of the power generation state detecting section 91 will be described with reference to FIG. Figure 10
[Fig. 3] is an example of a circuit configuration around a power generation detection circuit when performing full-wave rectification. In FIG. 10, the power generation state detection unit 91
As a peripheral circuit of the power generation state detection unit 91, a power generation device 40 that performs AC power generation, a rectification circuit 47 that rectifies an AC current output from the power generation device 40 and converts the AC current into a DC current, and a rectification circuit 47 outputs the current. And a high-capacity secondary power source 48 that stores electricity by a direct current.

The power generation state detecting section 91 compares the voltage V1 of the first output terminal AG1 of the power generator 40 with the high potential side terminal voltage VDD of the high capacity secondary power supply 48 and outputs the first comparison result data DC1. First comparator COMP1A and power generator 4
0 and the voltage V2 of the second output terminal AG2 and the high-capacity secondary power source 4
The second comparator COMP2A for comparing the high-potential-side terminal voltage VDD of 8 and outputting the second comparison result data DC2;
The comparison result data DC1 and the second comparison result data DC2 are ORed, and the OR circuit OR1 outputs the power generation detection data DDET.

When the power generation device 40 generates power, the power generation state detection unit 91 detects the power generation state of the power generation device 40 and L.
On the basis of the operating state of M, it is determined whether or not power generation capable of charging the high-capacity secondary power source 48 is being performed, and power generation detection data DDET having a frequency according to the power generation cycle is output to the central control circuit 93. Become.

Next, referring to FIG. 3, the power generation state detecting section 9
Another specific circuit configuration of No. 1 will be described. The power generation state detecting unit 91 is connected in series between a signal line having a high potential side voltage Vdd and a signal line having a low potential side voltage Vss, and a transistor 91A and a capacitor 91B connected in series, and connected to both ends of the capacitor 91B. Pull-down resistor 9
1C and a detection inverter 91E connected to a connection point 91D between the transistor 91A and the capacitor 91B.
And a charging current detection circuit DET connected between the positive side of the large capacity capacitor 48 and Vdd.

Then, when the charging current flows from the rectifying circuit 47 toward the large-capacity capacitor 48, a current also flows in the charging current detection circuit DET, and for example, the charging current detection circuit D
When ET is composed of a diode, a forward voltage VF is generated. This voltage VF is applied to the transistor 91.
When it is higher than the threshold voltage Vth of A, the transistor 91A is turned on and the capacitor 91B is charged. Further, the voltage VA at the connection point 91D approaches the high-potential-side voltage Vdd from the low-potential-side voltage Vss, and this state is maintained to some extent by the pull-down resistor 91C, so that the potential of the voltage VA becomes the threshold of the detection inverter 91E. When the value is exceeded, the output switches from "L" to "H".

By configuring the power generation state detecting section 91 in this way, the threshold voltage Vth of the transistor 91A,
By appropriately selecting the pull-down resistor 91C and the threshold value of the detection inverter 91E, a set voltage value V0 and a set time value T0, which will be described later, are set and the power generation state of the power generation device 40 is detected. Then, the power generation state detection unit 91 determines that the power generation unit A is in the power generation state when both the conditions of the first detection circuit 97 and the second detection circuit 98 are satisfied. Here, the set voltage value V0
Is a negative voltage when Vdd (= GND) is used as a reference and indicates a potential difference from Vdd.

Here, the set voltage value V0 used in the first detection circuit 97 is switched and controlled by the set value switching section 95, and the set value switching section 95 switches from the display mode to the power saving mode. Then, the value of the set voltage value V0 used for the first detection circuit 97 is changed. That is, in this example, the set voltage value Va is set in the display mode, and the set voltage value Vb is set in the power saving mode. The relationship is Va <Vb.
Is set to. Therefore, large power generation is required to switch from the power saving mode to the display mode. The set value switching unit 95 may switch the set time value T0 used in the second detection circuit 98.

Here, referring to FIG. 11, the voltage detection circuit 9
An example of No. 2 will be described. The voltage detection circuit 92 divides the voltage between the high-potential-side power supply VDD and the low-potential-side power supply VSS by a predetermined voltage division ratio to generate detection target voltage VDET, and resistors R1 and R2 connected in series, and high voltage. Reference voltage generator 92A for generating a predetermined reference voltage VREF from the power supply VDD on the potential side.
And a detection target voltage VDET, which is the voltage at the connection point of the resistors R1 and R2, and the reference voltage VREF, and outputs voltage detection data DV to the central control circuit 93.
And a first P-channel MOS transistor 92C which is turned on at the voltage detection timing by the sampling signal SP (“L” level at the time of detection) output from the central control circuit 93 to supply current to the resistors R1 and R2, and the central control A second P-channel MOS transistor which is turned on at the voltage detection timing by the sampling signal SP (“L” level at the time of detection) output from the circuit 93 to set the enable terminal EN of the comparator 92B to “H” level to bring the comparator 92B into an operating state. A transistor 92D,
It is configured with.

When the "L" level sampling signal SP is input from the central control circuit 93 to the voltage detection circuit 92,
First P channel MOS transistor 92C and second P channel
The channel MOS transistor 92D is turned on. As a result, power is supplied to the resistors R1 and R2, and the resistors R1 and R2 divide the voltage between the high-potential-side power supply VDD and the low-potential-side power supply VSS by a predetermined division ratio to detect the detection target voltage VDET.
Is generated and applied to the inverting input terminal of the comparator.

On the other hand, the enable terminal EN of the comparator 92B also becomes "H" level, and the comparator 92B
The voltage VDET to be detected is compared with the reference voltage VREF, and the voltage detection data DV is output to the central control circuit 93. Further, the central control circuit 93 includes a non-power generation time measuring circuit 99 for measuring the non-power generation time Tn in which no power generation is detected by the detection circuits 97 and 98, and when the non-power generation time Tn continues for a predetermined set time or longer, the display mode is set. To the power saving mode (first condition).

On the other hand, to return from the power saving mode to the display mode, the power generation state detecting section 91 detects that the power generating section A is in the power generating state, and the charging voltage Vc of the large capacity capacitor 48 is displayed from the power saving mode. It is executed when the condition (first condition) that sufficient electric energy required to return to the mode remains is satisfied. However, when the limiter circuit is operating (ON) in the power saving mode,
A short circuit path different from the normal charging path is created and the power generation unit A
Is short-circuited, and the power generation state detection unit 91 cannot detect the power generation unit A even when the power generation unit A is in a power generation state, and cannot switch from the power saving mode to the display mode. .

Therefore, in the present embodiment, in the power saving mode, the limiter circuit is turned off (open) regardless of the power generation state of the power generation unit A, and the power generation state detection unit 9
1 makes it possible to reliably detect the power generation state of the power generation unit A. In addition, since the power supply unit B of this embodiment includes the step-up / down circuit 49, even if the charging voltage Vc is low to some extent, the step-up / down circuit 49 is used to boost the power supply voltage to drive the hand movement mechanisms CS and CHM. It becomes possible.

On the other hand, conversely, the charging voltage Vc is high to some extent,
It is possible to drive the hand movement mechanisms CS and CHM by lowering the power supply voltage using the step-up / down circuit 49 even in a state where the drive voltage is higher than the drive voltages of the hand movement mechanisms CS and CHM. Therefore, the central control circuit 93 determines the step-up / down ratio based on the charging voltage Vc and controls the step-up / down circuit 49. However, if the charging voltage Vc is too low, it is not possible to obtain a power supply voltage that can operate the hand movement mechanisms CS and CHM even if the voltage is boosted. In such a case, if the power saving mode is changed to the display mode, accurate time display cannot be performed and useless power is consumed.

Therefore, in the present embodiment, by comparing the charging voltage Vc with a predetermined set voltage value Vb, it is determined whether or not the charging voltage Vc is sufficient, and this is changed from the power saving mode to the display mode. This is the first condition for shifting to. Further, the central control circuit 93, for example, when the user operates the external input device 100, or when the power generation detection unit 91 detects a non-power generation state, an instruction operation of shifting to a predetermined forced power saving mode. The power saving mode counter 101 is provided for monitoring whether or not the operation has been performed within a predetermined time. The mode set in this way is stored in the mode storage unit 94, and the information is stored in the drive control circuit 24, the time information storage unit 96, and the set value switching unit 9.
5 is supplied.

Here, in the drive control circuit 24, when the display mode is switched to the power saving mode, the supply of control signals to the second hand driving unit 30S and the hour / minute hand driving unit 30HM is stopped, and the second hand driving unit 30S and The operation of the hour / minute hand drive unit 30HM is stopped. As a result, the motors 10 and 60 do not rotate and the time display is stopped.

Further, in the central control circuit 93, when the power supply voltage becomes smaller than a predetermined amount of electricity required for returning from the power saving mode to the display mode by the processing described later, the power supply unit B From the control circuit 23 and the drive units 30S and 30HM to stop the supply of voltage. By this process, even when there is not enough electric energy left in the large capacity capacitor 48 to return from the power saving mode to the display mode, the discharge from the large capacity capacitor 48 is reduced and the electric charge is wasted. I'm eliminating it as much as possible.

Next, the time information storage unit 96 is more specifically composed of an up / down counter (not shown), and is generated by the pulse synthesizing circuit 22 when the display mode is switched to the power saving mode. Upon receiving the reference signal, time measurement is started to increase the count value (up counting), and the duration of the power saving mode is measured as the count value. Further, when the power saving mode is switched to the display mode, the count value of the up / down counter is decreased (down count), and the drive control circuit 24 is operated during the down count.
To output the fast-forward pulse supplied to the second hand driving unit 30S and the hour / minute hand driving unit 30HM. Then, when the count value of the up-down counter is zero, that is, when the fast feed hand movement time corresponding to the duration of the power saving mode and the elapsed time during the fast feed hand movement has elapsed, a control signal for stopping the delivery of the fast feed pulse is generated. The control signal is supplied to the second hand driving unit 30S and the hour / minute hand driving unit 30HM. As a result, the time display is restored to the current time. As described above, the time information storage unit 96 also has a part of the function of the current time returning / restoring means for returning the redisplayed time display to the current time.

Next, the drive control circuit 24 generates a drive pulse according to the mode based on various pulses output from the pulse synthesizing circuit 22. First, in the power saving mode, the supply of the drive pulse is stopped. Next, immediately after the power saving mode is switched to the display mode, in order to restore the redisplayed time display to the current time, a fast-forward pulse with a short pulse interval is used as a drive pulse to drive the second hand drive unit 3.
Supply to 0S and the hour / minute hand drive unit 30HM (current time returning means). Further, after the supply of the fast-forward pulse is completed, the drive pulse having the normal pulse interval is supplied to the second hand drive unit 30S.
And the hour and minute hand drive unit 30HM.

Reference numeral 120 denotes a portable state detecting circuit including an angular velocity sensor, a heat sensor, etc.
0 is for indirectly detecting whether or not the power generation device 40 is in a power generating state by detecting whether or not the electronic timepiece 1 is wrapped around the user's wrist. Further, the portable state detection circuit 120 is connected to a non-portable time measuring circuit 121 provided in the central control circuit 93, and the non-portable time measuring circuit 121 has the non-electric power generation time measuring circuit 9 described above.
The non-carrying time is measured almost in the same manner as 9. here,
The carrying state detection circuit 120 and the non-carrying time measuring circuit 12
1 is applied instead of the power generation state detection unit 91 and the non-power generation time measurement circuit 99.

[3] Operation of Embodiment The operation processing of the electronic timepiece 1 according to this embodiment will be described with reference to FIG. First, the control circuit 23 determines whether or not it is in the power saving mode (step S1). This step S1
If it is determined that the electronic timepiece 1 is in the power saving operation mode (step S1; YES), the process proceeds to step S5 described later. On the other hand, when it is determined in step S1 that the power saving mode is not in effect, that is, the display mode is in effect (step S1; NO), the central control circuit 93
Based on the detection signal of the power generation state detection unit 91, it is determined whether there is a power supply voltage, that is, whether the power generation device 40 is generating power (step S2). When it is determined in the determination in step S2 that the power generation device 40 is in the power generation state, the time display process of step S10 described below is performed.

In the determination of step S2, the power generation device 40
Is determined to be in a non-power generation state (step S
2; NO), the non-power generation time measuring circuit 9 of the central control circuit 93
9, the non-power generation time Tn is counted up (step S3). Then, the central control circuit 93 determines whether or not the non-power generation time Tn has continued beyond a predetermined set time (step S4). In the determination in step S4, when the non-power generation time Tn has not continued beyond the predetermined set time (step S4; NO), the process is moved to step S2 again, and from step S2 to step S2.
The process of 4 is repeated.

If it is determined in step S4 that the non-power generation time Tn has continued beyond the predetermined set time (step S4; YES), the power saving mode is switched to (step S5). On the other hand, in the power saving mode, the time information storage unit 96 counts up the time information corresponding to the elapsed time in the power saving mode in order to perform the time return process (step S9) described later (step S6). Then, it is determined whether or not the power supply voltage (the charging voltage Vc of the large-capacity capacitor 48 in this embodiment) is higher than the determination voltage V1 necessary for returning from the power saving mode to the display mode (step S7) (step S7). Condition 2). This step S7
If the charging voltage Vc is larger than the determination voltage V1 (step 7; YES), that is, if the display mode can be restored from the power saving mode, it is determined again whether the power generation device 40 is generating power. (Step S8). When it is determined in step S8 that there is no power generation (step S8; NO), the processes of steps S6 and S7 are repeated.

If it is determined in step S8 that power generation has started (step S8; YES), the power saving mode is restored to the display mode, and the time is set in the time information storage unit 9
The time restoration processing is performed based on the count value of 6, and the hands 55, 76, 77 are also driven as usual (step S10). The time return process from the power saving mode to the display mode is a current time return process that is performed faster than a normal drive operation.

On the other hand, in the determination of step S7, when the charging voltage Vc stored in the large-capacity capacitor 48 is equal to or lower than the determination voltage V1 (step S7; NO), that is, the charging voltage Vc of the large-capacity capacitor 48 is displayed from the power saving mode. When the voltage is reduced to a voltage that cannot return to the mode, the supply of the charging voltage Vc supplied from the large-capacity capacitor 48 to the step-up / down circuit 49 is stopped, and the power supply voltage Vss output from the step-up / down circuit 49 is changed to the control circuit 23. The supply to the Vss driving unit 23A, the pulse synthesizing circuit 22, and the driving units 30S and 30HM is stopped (step S11).

In step S11, V of the control circuit 23 is
ss driver 23A, pulse synthesizing circuit 22, and driver 30
By stopping the supply of the power supply voltage Vss to S and 30HM, the generation of the pulse signal in the pulse synthesizing circuit 22 is stopped and the count-up in the time information storage unit 96 is stopped. As a result, the control circuit 23 reduces the consumption of electric energy to zero. For example, the consumption of electric energy when executing the power saving mode can be cut by about 80% with respect to the power consumption when executing the display mode, but in this state, it can be further cut to 99.5%. can do. Further, of the Vss drive unit 23A, only the power generation state detection unit 91 does not stop the supply of the power supply voltage Vss, and if the supply of the power supply voltage Vss is continued, the circuit operation at the time of restart can be stabilized. it can.

Further, in step S12, the power generation device 4
0 restarts power generation by the power generation state detection unit 91 (third condition), and the power generation state detection unit 91 detects that power generation is started in this step S12.
Wait at. Here, when the power generation state detection unit 91 detects that power generation is restarted (step S12; YE
S), the charging voltage V supplied from the large-capacity capacitor 48
c is supplied to the step-up / step-down circuit 49, and the power supply voltage Vss is supplied from the step-up / step-down circuit 49 to the Vss drive section 23A of the control circuit 23, the pulse synthesizing circuit 22 and the drive sections 30S and 30HM, and the electronic timepiece 1 is restarted. .

In step S12, the voltage detection circuit 92 detects the charging voltage Vc of the large-capacity capacitor 48 and determines whether or not it has the minimum voltage value required for restarting. Charge voltage V until this voltage value is reached
By stopping the supply of c, the large-capacity capacitor 4
Charging in 8 can be accelerated.

Further, in this case, since the control circuit 23 is also stopped, the time recovery process cannot be performed, and therefore the user needs to manually adjust the time. Further, using specific numerical values, in the conventional technique, the charging voltage Vc of the large-capacity capacitor 48 is about 0.
When the voltage drops to about 45 V, it is necessary to shake the electronic timepiece 1 about 300 times in order to fully charge the large-capacity capacitor 48 after starting power generation. But,
In the present embodiment, the determination voltage V1 is set to 1V so that the charging voltage Vc is less likely to drop below 1V. Therefore, in order to fully charge the large-capacity capacitor 48 after starting power generation, It is only necessary to shake the timepiece 1 about 100 times, and the electronic timepiece 1 can be easily restarted.

[4] Effects of the Embodiment As described above, the electronic timepiece 1 according to the present embodiment is
The electronic timepiece 1 is in the power saving mode, that is, the large capacity capacitor 48.
From the step-up / step-down circuit 49, and outputs the charging voltage Vc from the step-up / step-down circuit 49 to the control circuit 23 to supply the power-supply voltage Vss obtained by stepping up / down the charging voltage Vc only to the control circuit 23. When the charging voltage Vc becomes equal to or lower than the judgment voltage V1 necessary for returning from the power saving mode to the display mode, the supply of the charging voltage Vc output from the large capacity capacitor 48 to the step-up / down circuit 47 is stopped. , V of the control circuit 23 from the power supply unit B (step-up / down circuit 47)
ss driver 23A, pulse synthesizing circuit 22, and driver 30
The supply of the power supply voltage Vss supplied toward S and 30HM is stopped.

As a result, wasteful consumption of electric energy in the large capacity capacitor 48 can be eliminated, and the charging voltage Vc of the large capacity capacitor 48 can be held. As a result, when the power generation device 40 starts power generation, the charging voltage Vc of the large-capacity capacitor 48 is output to the step-up / step-down circuit 49, so that the step-up / step-down circuit 49 outputs the power supply voltage Vss.
Is supplied to the Vss driving unit 23A, the pulse synthesizing circuit 22 and the driving units 30S and 30HM of the control circuit 23, and the electronic timepiece 1
Can be restarted quickly. In addition, wasteful consumption of the charging voltage Vc of the large-capacity capacitor 48 is suppressed, and when the user carries the electronic timepiece 1 to start power generation by the power generation device 40, the second hand 55 can be promptly actuated, and the user can use the electronic timepiece. If the timepiece 1 is out of order, it is possible to prevent an early match.

[5] Modification of Embodiment [5.1] First Modification In this first modification, as shown in FIG. 5, the constant voltage drive circuit 2 is used.
00 (for example, an oscillating circuit and a frequency dividing circuit) is a constant voltage Vreg set by the constant voltage generating circuit 201. Here, the constant voltage generation circuit 20
1 will be described. FIG. 12 shows a configuration diagram of the constant voltage generation circuit 201.

The constant voltage generating circuit 201 is roughly classified into a constant current source 220 such as a depletion transistor for generating a constant current IREF, a first current mirror circuit 221 for generating the same current as the constant current IREF, and a constant current source 221. Current IRE
A differential amplifier circuit 222 that differentially amplifies the reference voltage V1 and the generated voltage V2 generated by flowing F, and a second current mirror circuit that makes a current flowing through each part of the differential amplifier circuit 222 a constant current. 223 and the differential amplifier circuit 22
2 and a constant voltage generator 224 that generates and outputs a constant voltage VREG based on the output of the second constant voltage VREG.

In the first current mirror circuit 221, a source S is commonly connected to the high potential side power source VDD and a gate terminal G is commonly connected to a P-channel MOS transistor MP1,
The P-channel MOS transistor MP1 having MP2 and MP3 is in a saturation connection in which the gate G and the drain D are connected.

In the differential amplifier circuit 222, the source S is connected to the drain D of the P-channel MOS transistor MP2, and the gate S is connected to the drain D of the P-channel MOS transistor MP1. P-channel MOS transistor M
It is connected to the drain D of P2 and the gate G is P channel M
A P-channel MOS transistor MP5 connected to the drain D of the OS transistor MP3 and a gate potential holding capacitor CGK having one end connected to the drain of the P-channel MOS transistor are configured.

The second current mirror circuit 223 has an N-channel MOS transistor MN3 having a drain D connected to the drain D of the P-channel MOS transistor MP4 and a source S connected to the low potential side power supply VSS side, and a gate G.
Is connected to the gate G of the N-channel MOS transistor MN3, and the drain D is connected to the P-channel MOS transistor M.
An N channel MOS transistor MN connected to the drain D of P5 and the gate G of the N channel MOS transistor MN3, and a source S connected to the low potential side power supply VSS side.
4 is provided.

In the constant voltage generator 224, the drain D is connected to the gate G by saturation connection, the drain D is connected to the drain D of the P-channel MOS transistor MP3, and the source S is connected to the other end of the gate potential holding capacitor CGK. Was N
Channel MOS transistor MN1 and N channel MO
The drain D is connected to the source S of the S transistor MN1, the source S is connected to the low-potential-side power supply VSS, and the gate G
Is provided with an N-channel MOS transistor MN2 connected to one end of the gate potential holding capacitor CGK, and the connection point between the source S of the N-channel MOS transistor MN1 and the drain of the N-channel MOS transistor MN2 is a constant voltage. It is the output terminal of VREG.

Next, the general operation of the constant voltage generating circuit 201 will be described. The first current mirror circuit 221 includes the constant current source 2
The same current as the constant current IREF generated by 20 (indicated by the same reference numeral IREF in the figure) is generated as the source-drain current of the P-channel MOS transistor MP3, and is supplied to the constant voltage generation unit 224. P channel MO at this time
The relation between the drain current Ids of the S transistor MP1 and the gate voltage is expressed by the following equation. Ids = βW / (2L)  (Vgs-Vth) 2 where β is a gain constant.

In parallel with this, the differential amplifier circuit 222
The differential amplification of the reference voltage V1 and the voltage V2 is performed, and the differential voltage is output to the constant voltage generator 224. At this time, the source-drain currents of the P-channel MOS transistor MP4 and the P-channel MOS transistor MP5 have the same current value due to the second current mirror circuit. Constant voltage generator 2
Based on the output of the differential amplifier circuit 222, 24 performs feedback control so that the reference voltage V1 and the voltage V2 become V1 = V2. As a result, the threshold voltage VT of the P-channel MOS transistor MP1 forming the first current mirror circuit 221.
P, a constant voltage Vreg determined by the threshold voltage VTN of the N-channel MOS transistor MN1 of the constant voltage generator 224 and the constant current IREF are generated.

By the way, as described above, when the voltage supplied to the constant voltage drive circuit 200 (for example, the oscillation circuit, the frequency divider circuit, etc.) is the constant voltage Vreg set by the constant voltage generation circuit 201, it is large. A latch circuit 202 is provided between the capacitance capacitor 48 and the central control circuit 93, and a P-channel type transistor 203 connected between the output side of the latch circuit 202 and the middle of the high potential side Vdd line. The central control circuit 93 is controlled by these elements.
The operation stopping means is configured separately from. When the high-potential side voltage Vdd is used as the reference potential (GND), the low-potential voltage Vss becomes the power supply voltage, and this potential difference is the charging voltage Vss.
c. The oscillation circuit and the frequency dividing circuit are driven by the constant voltage Vreg output from the constant voltage generating circuit 201.

Here, in the central control circuit 93, in the power saving mode, the voltage detection circuit 92 monitors the power supply voltage (charging voltage Vc of the large-capacity capacitor 48), and when it falls below a predetermined voltage value, it becomes "L". To the latch circuit 202. Then, in the latch circuit 202, the signal output from the power generation state detection unit 91 and the central control circuit 93
In response to the signal output from the transistor 203, a signal which becomes "H" is output to the transistor 203 and the transistor 203 is turned off. Then, the charging voltage Vc of the large capacity capacitor 48 is stopped from being supplied to the central control circuit 93, the voltage detection circuit 92, the constant voltage generation circuit 201 and the like. As a result, in the constant voltage generation circuit 201, the constant voltage Vreg output upon receiving the charging voltage Vc is stopped, and the operation of the constant voltage drive circuit 200 is stopped. Further, in the power saving mode, the driving units 30S and 30HM are stopped, and most of the current consumption of the circuit is constant voltage driving circuit 200 such as an oscillating circuit and a frequency dividing circuit for generating the reference pulse signal, and the constant voltage generating circuit 201. Since the current is consumed by the constant voltage driving circuit 200, the current consumption in the constant voltage driving circuit 200 can be reduced to zero by stopping the supply of the constant voltage Vreg to the constant voltage driving circuit 200. The current consumption of the entire circuit can be reduced to almost zero by stopping the supply of the.

When the power generation state detection unit 91 detects that the power generation unit A has started power generation and a signal of "H" is input to the latch circuit 202, the transistor 20
3 is turned on, and the charging voltage Vc changes to the central control circuit 9
3, supplied to the voltage detection circuit 92, the constant voltage generation circuit 201, and the like. Since the large-capacity capacitor 48 holds a voltage with a margin for starting oscillation, it is possible to speed up the start-up of oscillation. Thereby, the electronic timepiece 1 can be easily restarted. Note that the output of the latch circuit 202 becomes unstable when the transistor 203 is turned off and the supply of the power supply voltage Vss is stopped. Therefore, in order to reliably turn off the transistor 203, it is desirable to connect a pull-up resistor having a high resistance value to the gate terminal side of the transistor 203.

[5.2] Second Modification Next, in the first modification, the transistor 203 is connected in the middle of the line to which the high potential side voltage Vdd is supplied so that the supplied current is cut off. Therefore, it is necessary to use a transistor having a relatively large capacity as the transistor 203. Therefore, the second modification can also be realized by configuring the operation stopping means as shown in FIG. The oscillating circuit 301, the frequency dividing circuit 302, and the level shifter 303 embody the constant voltage driving circuit 200 driven by the constant voltage Vreg. In this modification, the line having the high-potential side voltage Vdd is the reference line a, the line having the low-potential side voltage Vss is the feeding line b, and the line having the constant voltage Vreg serving as the constant potential is the constant voltage line c. To do.

Here, a P-channel type transistor 304 is connected between the lines a and c, a P-channel type transistor 305 is connected between the line b and the constant voltage circuit 92, and the gate of the transistor 305 is connected. And central control circuit 9
The output side of 3 is connected. And transistor 3
The gate of 04 is connected to the output side of the central control circuit 93. Note that the transistor 304 and the transistor 3
05 constitutes an operation stopping means. In the circuit configuration according to the second modified example configured as described above, the electronic timepiece 1
Is in the power saving mode, the power generation state detection unit 91 monitors the power generation state of the power generation unit A, and when the power generation unit A is in the non-power generation state, the transistor 304 outputs a signal that becomes “L”.
And to the transistor 305. As a result, the transistor 304 is turned on to short-circuit the reference line a and the constant voltage line c, thereby stopping the constant voltage reg supplied to the oscillation circuit 301, the frequency dividing circuit 302, and the level shifter 303. Almost at the same time, a signal of "L" is input to the transistor 305, so that the transistor 305 is turned off, the charging voltage Vc supplied from the large-capacity capacitor 48 to the constant voltage generating circuit 201 is stopped, and the constant voltage is constant. The supply of the voltage Vreg is also stopped.

On the other hand, when power generation is started, a signal of "H" is output from the central control circuit 93 to turn off the transistor 304 and the transistor 305.
Is turned on to activate the constant voltage generating circuit 201 to supply the constant voltage Vreg. As a result, the oscillator circuit 301
Is also supplied with a constant voltage Vreg, and a reference pulse is generated from the oscillation circuit 301. Moreover, in this circuit configuration, a transistor having a relatively small withstand voltage can be used, and by stopping the supply of the charging voltage Vc, the current consumption in the constant voltage generating circuit 201 can be made substantially zero.

Although the transistor 304 is turned on in order to stop the supply of the constant voltage Vreg, the transistor 304 is connected in the middle of the constant voltage line c to turn off the transistor to turn off the charging voltage. The supply may be stopped. Further, the central control circuit 93 may include the latch circuit 202 shown in the first modification.
In addition, in the above description, the on / off operation of the transistor 304 and the off / on operation of the transistor 305 are performed at the same time, but it is better to provide a delay circuit in the preceding stage of the gate of the transistor 304 and operate the transistor 305 first. preferable.

[5.3] Third Modified Example Next, a third modified example will be described with reference to FIGS. 7 and 8. In this modification, the generation of the reference pulse generated from the oscillation circuit is stopped. First, although the circuit configuration around the power supply is almost the same as that of the second modification, the operation stopping means composed of the transistor 304 and the transistor 305 is not connected, and the central control circuit 93 and the oscillation circuit 401 oscillate. They are connected by a signal line d that outputs a circuit drive signal.

Next, the circuit configuration of the oscillator circuit 401 incorporated in the electronic timepiece 1 will be described with reference to FIG. Crystal oscillator 4
02 has a drain capacitance 403 and a gate capacitance 40 at both ends.
4 is connected to the reference line a, which is the high-potential-side voltage Vdd, and a series circuit including a drain resistance 405 and a feedback resistance 406 is connected. Further, between the reference line a and the constant voltage line c, P
A channel type transistor 407, an N channel type transistor 408, and a P channel type transistor 409 are sequentially connected. Further, the gates of the transistors 407 and 408 are connected to the connection point of the gate capacitance 404 and the feedback resistor 406, the drain of the transistor 407 and the drain of the transistor 408 are connected to the drain resistor 405, and the gate of the transistor 409 is further connected. It is connected to the output side of the central control circuit 93. On the other hand, the connection point between the drain resistor 405 and the feedback resistor 406 is the divider circuit 302.
It is connected to the.

In this oscillator circuit 401, the elements other than the crystal oscillator 402 are integrated by an IC, and the crystal oscillator 4
02, the transistor 409, and the circuit elements other than the feedback resistor 406 constitute an oscillation inverter. In the circuit configuration according to the third modified example configured in this manner, when the electronic timepiece 1 is in the display mode and the power saving mode, the oscillation circuit that is output from the central control circuit 93 to the gate of the transistor 409 via the signal line d. Drive signal is "H"
Then, the constant voltage Vreg is supplied to the oscillating inverter, and the reference pulse is output to the frequency dividing circuit 302 by utilizing the natural vibration of the crystal oscillator 402.

Further, when the electronic timepiece 1 is in the power saving mode, the power generation state detecting section 91 monitors the power generation state of the power generation section A, and when the power generation section A is in the non-power generation state, "L" is output.
Then, the oscillation circuit drive signal is output to the gate of the transistor 409 to turn off the transistor 409. Then, the supply of the constant voltage Vreg to the oscillation inverter is stopped, and the reference pulse generated from the oscillation circuit 401 is stopped. As a result, the current consumption of each circuit can be reduced.

On the other hand, when the power generation state detection unit 91 detects that the power generation unit A has started power generation, the central control circuit 93 outputs an oscillation circuit drive signal of "H" to the transistor 409 via the signal line d. Is output to the gate of
The constant voltage Vreg is supplied to the oscillation inverter, and the oscillation circuit 40
The reference pulse from 1 is output to the frequency dividing circuit 302.

[5.4] Fourth Modification In this fourth modification, as shown in the flowchart of FIG. 9, the judgment voltage for shifting from the power saving mode to the stop of voltage supply is set to the above-described judgment voltage V1 (hereinafter , The first determination voltage V
Second determination voltage V2 (hereinafter referred to as the second
Determination voltage V2) and the determination counter value T1 at this time. The second determination voltage V2 is set by the hands 55, 76, 77 when returning from the power saving mode to the display mode. Is the counter value at this time, which is the voltage value required for the rotation of about 180 degrees.

Here, steps S21 to S3
The processing from 0 to step S1 to step S in FIG.
Since the processing up to 10 is almost the same, the description thereof is omitted. In the determination of step S27, when the charging voltage Vc of the large capacity capacitor 48 is equal to or lower than the first determination voltage V1 (step S27; NO), that is, the large capacity capacitor 48.
When the voltage of 3 becomes a voltage that cannot return from the power saving mode to the display mode, it is determined whether or not the value of the time counter T exceeds the determination counter value T1 (step S31).

If the value of the counter T exceeds the judgment counter value T1 in step S31, step S33.
Then, the processing from step S33 onward is performed, and if not exceeded, the processing at step S32 is performed. That is, in step S32, the charging voltage Vc is the second determination voltage V2.
If the charging voltage Vc is smaller than the second judgment voltage V2 (step S32; N).
O), that is, needles 55, 76, 77 on the large-capacity capacitor 48.
If there is not enough electric energy remaining to restore the control circuit 23 and the drive unit 3 in step S33.
Stop the supply of voltage to 0S and 30HM. Further, in step S34, the power generation state detection unit 91 monitors whether or not the power generation device 40 has started power generation, and waits in step S34 until the power generation state detection unit 91 detects that power generation has started. To do. On the other hand, when the power generation state detection unit 91 detects that power generation has started (step S3
4; YES), the charging voltage Vc supplied from the large-capacity capacitor 48 is supplied to the control circuit 23 and the driving units 30S and 30HM to operate the electronic timepiece 1 (step S35).

On the other hand, when it is determined in step S32 that the charging voltage Vc is greater than the second determination voltage V2 (step S32; YES), that is, sufficient to return the needles 55, 76, 77 to the large capacity capacitor 48. If sufficient electric energy remains, the time counting is continued in step S36, and in step S37 it is monitored whether or not power generation has started via the power generation state detection unit 91, and the power generation state must be detected. For example, the processing from step S31 is repeated. If power is generated in the determination in step S37, the process proceeds to step S38 and the current time is restored. Thus, in this modification, the charging voltage Vc
Becomes smaller than the first judgment voltage V1 and then the value T of the time counter becomes larger than the judgment counter value T1 or the charging voltage Vc becomes smaller than the second judgment voltage V2, It is designed to stop the voltage supply. With this, it is possible to give a time width to stop the supply of the charging voltage Vc, and to suppress the supply stop of the charging voltage Vc as much as possible to display the current time from the power saving mode when the power generation is started. It is designed to return to the mode.

[5.5] Fifth Modification In the above embodiment, an electronic timepiece that displays hours, minutes, and seconds with two motors is described as an example. However, one motor is used for hours, minutes, and seconds. The present invention can also be applied to an electronic timepiece that displays the time as a whole. On the contrary, the present invention can be applied to an electronic timepiece having three or more motors (motors that individually control the second hand, minute hand, hour hand, calendar, chronograph, etc.).

[5.6] Sixth Modification In the above embodiment, the display mode is automatically switched to the power saving mode. However, when the user operates the external input device 100, for example, a crown is displayed. On the other hand, it is also possible to detect that a specific operation has been performed and forcibly switch the display mode to the power saving mode, or switch from the power saving mode to the voltage supply stop. Furthermore, the supply of electric energy from the power supply unit B may be stopped or started depending on the operation status of the external input device 100.

[5.7] Seventh Modification In the above embodiment, the power generation state detection unit 91 monitors whether the power generation device 40 is in a power generation state or a non-power generation state. However, the present invention is not limited to this. The portable state detection circuit 120 shown in FIG. 2 may indirectly monitor that the power generation device 40 is in the non-power generation state when in the non-portable state.

[5.8] Eighth Modification In the above-described embodiment, the voltage detection circuit 92 monitors the charging voltage Vc of the large-capacity capacitor 48, and when the charging voltage Vc becomes equal to or lower than the determination voltage V1, electric Although the supply of energy is stopped, the present invention is not limited to this, and the supply of electric energy may be stopped by monitoring the power supply voltage Vss output from the step-up / down circuit 49.

[5.9] Ninth Modification Although the wristwatch type electronic timepiece 1 has been described as an example in the above embodiment, the present invention is not limited to this.
Besides wristwatches, calculators, mobile phones, portable personal computers, P
It can be applied to various portable electronic devices such as DAs, liquid crystal televisions, and portable VTRs.

[5.10] Tenth Modification In the above embodiment, as the power generator 40, the rotary motion of the rotary weight 45 is transmitted to the rotor 43, and the rotation of the rotor 43 causes the electromotive force Vgen to the output coil 44. Although an electromagnetic power generation device for generating is adopted, the present invention is not limited to this, and for example, a rotational motion is generated by a restoring force of a mainspring (corresponding to external energy), and an electromotive force is generated by the rotational motion. It may be a power generation device that generates, or a power generation device that generates power by a piezoelectric effect by applying vibration or displacement (corresponding to external energy) to the piezoelectric body by external or self-excitation. Further, it may be a power generation device that generates electric power by photoelectric conversion using light energy of sunlight or the like (corresponding to external energy). Further, it may be a power generation device that generates electric power by thermoelectric power generation due to a temperature difference (thermal energy; corresponding to external energy) between a certain portion and another portion. Further, it is also possible to use an electromagnetic induction power generator that receives stray electromagnetic waves such as broadcast and communication radio waves and uses the energy (corresponding to external energy) of the stray electromagnetic waves.

[5.11] Eleventh Modification In the above embodiment, the reference potential (GND) is set to Vdd.
Although the high potential side voltage is set, it goes without saying that the reference potential (GND) may be set to Vss (low potential side voltage). In this case, the set voltage values V0 and Vgen are
It indicates the potential difference from the detection level set on the high voltage side with ss as the reference.

[5.12] Twelfth Modification In the above embodiment, a rechargeable power storage device such as a capacitor or a secondary battery that stores the power generated by the power generator is used as the power source. It may be used, and further, a rechargeable power storage device and a primary battery may be used together, or a power generation device and a primary battery may be used together.

[5.13] Thirteenth Modification In the above description of the portable telephone, the case of the analog electronic timepiece has been described, but it is also applicable to an electronic apparatus having a digital display device (digital display means) such as a liquid crystal panel. It is possible. In this case, in the power saving mode,
The power supply to the digital display device is stopped, and no display is made. It should be noted that it is possible to perform partial display so that the user does not apologize for the failure state when the display is not being performed. For example, it suffices to display only a blinking mark or the like on the display screen about once every 2-3 seconds. (Brief description of drawings)

FIG. 1 is a diagram showing a schematic configuration of an electronic timepiece according to an embodiment of the present invention. FIG. 2 is a functional block diagram showing the control circuit and its peripheral configuration according to the embodiment. FIG. 3 is a circuit diagram embodying the power generation state detection unit. FIG. 4 is an operation flowchart of the embodiment. FIG. 5 is a block diagram showing a configuration of a power supply peripheral portion according to the first modification. FIG. 6 is a block diagram showing a configuration of a power supply peripheral portion according to the second modification. FIG. 7 is a block diagram showing a configuration of a power supply peripheral portion according to the third modification. FIG. 8 is a circuit diagram embodying the oscillation circuit. FIG. 9 is a flowchart showing the operation according to the fourth modification. FIG. 10 is a schematic configuration diagram of the power generation detection circuit. FIG. 11 is a schematic configuration diagram of the voltage detection circuit. FIG. 12 is a schematic configuration diagram of the constant voltage generation circuit.

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-9-304555 (JP, A) JP-A 11-223682 (JP, A) JP-A 55-63781 (JP, A) JP-A 58- 60277 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) G04C 3/14 G04C 10/00

Claims (22)

(57) [Claims] 1. A rechargeable power supply unit for supplying electric energy, and an electric energy supplied from the power supply unit,
A drive control unit that outputs a drive signal, a driven unit that is driven by receiving the drive signal, and a drive that performs an ordinary drive in an operation mode of the driven unit based on a preset first condition. A mode switching unit that switches between a power saving mode and a power saving mode; and when the power saving mode is set by the mode switching unit, the amount of electric energy stored in the power supply unit based on a second condition set in advance is a predetermined electric power. An electronic device, comprising: an operation stopping unit that stops the operation of the drive control unit when it is determined that the amount of energy has become smaller than the amount of energy. 2. The electronic device according to claim 1, wherein the operation stopping unit stops the electric energy supplied from the power supply unit to the drive control unit when stopping the operation of the drive control unit. An electronic device characterized by: 3. The electronic device according to claim 1, wherein the drive control unit is operated by electric energy supplied from the power supply unit and outputs a control signal, and an electric power supplied from the power supply unit. And a drive circuit that operates by energy and receives a control signal and outputs a drive signal to the driven section, wherein the mode switching section supplies electric energy to the control circuit and the drive circuit in the drive mode. An electronic device which supplies power and supplies electric energy only to the control circuit in a power saving mode. 4. The electronic device according to claim 1, wherein the power supply unit stores a power generation unit that converts external energy into electric energy, and the electric energy supplied from the power generation unit, and the electric energy and the drive. An electronic device, comprising: a power storage unit that is supplied to a control unit. 5. The electronic device according to claim 4, further comprising a power generation state detection unit that detects whether or not the power generation unit is in a power generation state, wherein the first condition is the power generation state detection unit An electronic device, wherein the power generation unit is in a power generation state. 6. The electronic device according to claim 5, wherein the power generation state detection unit is an energy amount determination unit that determines whether or not the amount of electric energy output from the power generation unit exceeds a determination energy amount. An electronic device comprising: a power generation time determination unit that determines whether or not the duration of time when the amount of electric energy exceeds the amount of determination energy exceeds a determination time value by the energy amount determination unit. 7. The electronic device according to claim 1, further comprising a portable state detection unit that detects whether or not the electronic device is in a portable state, wherein the first condition is an operation mode of the driven unit. When switching from the drive mode to the power saving mode, the portable state detection unit detects that the electronic device is in the non-portable state, and the electronic device is in the non-portable state for a predetermined period of time. When switching the operation mode of the driven part from the power saving mode to the drive mode,
An electronic device, wherein the electronic device is switched from a non-portable state to a portable state by the portable state detection unit. 8. The electronic device according to claim 1, further comprising a voltage detection unit that detects a voltage of the power supply unit, wherein the second condition is that the voltage of the power supply unit detected by the voltage detection unit is predetermined. The electronic device is characterized in that the voltage is below the voltage. 9. The electronic device according to claim 1, further comprising an electric energy amount detection unit that detects an amount of electric energy supplied from the power supply unit, wherein the second condition is the electric energy amount detection unit. When the amount of electric energy that can be supplied by the power supply unit detected by the power supply unit becomes smaller than a predetermined amount of electric energy required to return the operation mode of the driven unit from the power saving mode to the driving mode. An electronic device characterized by being present. 10. The electronic device according to claim 4, further comprising a power generation state detection unit that detects whether or not the power generation unit is in a power generation state, and further, the operation stop unit stops the operation of the drive control unit. In the state, an operation start unit that starts the operation of the drive control unit when a preset third condition is satisfied is provided, and the third condition is the power generation unit detected by the power generation state detection unit. An electronic device characterized in that when the power generation is started. 11. The electronic device according to claim 1, further comprising a portable state detection unit that detects whether the electronic device is in a portable state, and further, the operation stop unit stops the operation of the drive control unit. An operation start unit that starts the operation of the drive control unit based on a preset third condition when in the state, and the operation start unit uses the portable state detection unit as the third condition. An electronic device, characterized in that it determines when the electronic device is switched from a non-portable state to a portable state. 12. The electronic device according to claim 1, further comprising an external operation input section operated by a user from the outside, wherein the drive mode and the drive mode by the mode switching section are determined based on an operation status of the external operation input section. Electronic equipment characterized by switching to a power saving mode. 13. The electronic device according to claim 1, wherein the driven unit has a time display unit that displays time, and the drive control unit includes a mode switching unit. An electronic device comprising: a current time restoration unit that performs a restoration operation for restoring the time display to the current time when the operation mode of the driven unit is switched from the power saving mode to the driving mode. 14. The electronic device according to claim 13, wherein the time display unit has a time display hand and a motor that moves the hand, and the current time return unit uses the motor to move the hand. An electronic device characterized by returning the above-mentioned hand movement at a high hand movement speed which is higher than the normal hand movement speed. 15. The electronic device according to claim 1, wherein the drive control unit is operated by electric energy supplied from the power supply unit and outputs a control signal, and an electric power supplied from the power supply unit. A drive circuit that operates by energy and receives a control signal and outputs a drive signal toward the driven part, wherein the control circuit includes an oscillating circuit that generates a basic pulse; An electronic device characterized by stopping the operation of an oscillation circuit. 16. The electronic device according to claim 1, wherein the drive control unit is operated by electric energy supplied from the power supply unit and outputs a control signal, and an electric power supplied from the power supply unit. A drive circuit that operates by energy and receives a control signal and outputs a drive signal toward the driven portion, wherein the control circuit includes an oscillation circuit that generates a basic pulse and a basic circuit that is output from the oscillation circuit. A frequency dividing circuit for frequency-dividing a pulse, wherein the operation stopping unit stops the operation of the oscillation circuit or the frequency dividing circuit. 17. A rechargeable power supply unit that supplies electric energy, a drive control unit that is driven by the electric energy supplied from the power supply unit, and outputs a drive signal, and a drive signal that is output from the drive control unit. A method of controlling an electronic device having a driven unit driven by receiving the received power, wherein the operation mode of the driven unit is switched between a drive mode and a power saving mode based on a preset first condition. It is determined that the amount of electric energy stored in the power supply unit becomes smaller than a predetermined amount of electric energy based on the second condition set in advance in the power saving mode by the switching process and the mode switching process. In this case, an operation stopping step of stopping the operation of the drive control unit is included. Your way. 18. The method of controlling an electronic device according to claim 17, wherein the power supply unit stores a power generation device that converts external energy into electric energy, and stores the electric energy supplied from the power generation device to generate the electric power. A power storage device that supplies energy to the drive control unit, and has a power generation state detection step of determining whether or not the power generation device is in a power generation state, and the first condition is the power generation state detection step. A method of controlling an electronic device, comprising: determining whether or not the power generation device is in a power generation state. 19. The electronic device control method according to claim 17, further comprising a portable state detecting step of detecting whether or not the electronic device is in a portable state, wherein the first condition is that the driven device is driven. When switching the operation mode of the unit from the drive mode to the power saving mode,
The portable state detection step detects that the electronic device is in the non-portable state, and the electronic device is in the non-portable state for a predetermined period of time. The operation mode of the drive unit is set to the power saving mode. The method for controlling an electronic device is characterized in that the non-carrying state is switched to the carrying state in the carrying state detecting step when switching from the driving mode to the driving mode. 20. The method of controlling an electronic device according to claim 17, further comprising an electric energy amount detecting step of detecting an amount of electric energy supplied from the power supply unit, wherein the second condition is the electric energy. The amount of electric energy that can be supplied by the power supply unit detected in the energy amount detecting step is smaller than a predetermined amount of electric energy required to return the operation mode of the driven unit from the power saving mode to the driving mode. A method for controlling an electronic device, which is characterized in that 21. The method of controlling an electronic device according to claim 17, wherein the power supply unit stores a power generation device that converts external energy into electric energy, and stores the electric energy supplied from the power generation device. A power storage device for supplying energy to the drive control unit, and a power generation state detecting step of detecting whether or not the power generation device is in a power generation state. Further, the operation of the drive control unit is performed by the operation stopping step. An operation start step of starting the operation of the drive control unit based on a preset third condition when in the stopped state is provided, and the third condition is that the power generation device generates power by the power generation state detection step. A method for controlling an electronic device, which is characterized in that it is detected that the operation has started. 22. The method of controlling an electronic device according to claim 17, wherein the power supply unit stores a power generation device that converts external energy into electric energy, and stores electric energy supplied from the power generation device. A power storage device that supplies energy to the drive control unit, and a portable state detection step of detecting whether or not the electronic device is in a portable state. Further, the operation of the drive control unit is performed by the operation stop step. An operation start step of starting the operation of the drive control unit based on a preset third condition when in the stopped state is provided, and the third condition is that the electronic device is not operated by the portable state detection step. A method for controlling an electronic device, wherein the control is performed when the portable state is switched to the portable state.