Source: https://patents.google.com/patent/JP2012145558A/en
Timestamp: 2020-04-10 04:27:58
Document Index: 43597515

Matched Legal Cases: ['art 3', 'art 4', 'art 5', 'art 4', 'art 5', 'art 3', 'art 5', 'art 7', 'art 72', 'art 7', 'art 1', 'art 4', 'art 5', 'art 6', 'art 7', 'art 8', 'art 9', 'art 10', 'art 17']

JP2012145558A - Control device, electronic device, timepiece device, and control method - Google Patents
Control device, electronic device, timepiece device, and control method Download PDF
JP2012145558A
JP2012145558A JP2011147387A JP2011147387A JP2012145558A JP 2012145558 A JP2012145558 A JP 2012145558A JP 2011147387 A JP2011147387 A JP 2011147387A JP 2011147387 A JP2011147387 A JP 2011147387A JP 2012145558 A JP2012145558 A JP 2012145558A
JP2011147387A
Saburo Manaka
Chikashi Motomura
幸祐 山本
京志 本村
三郎 間中
2010-09-03 Priority to JP2010198084 priority Critical
2010-09-03 Priority to JP2010198084 priority
2010-12-22 Priority to JP2010286681 priority
2011-07-01 Application filed by Seiko Instruments Inc, セイコーインスツル株式会社 filed Critical Seiko Instruments Inc
2011-07-01 Priority to JP2011147387A priority patent/JP2012145558A/en
2012-08-02 Publication of JP2012145558A publication Critical patent/JP2012145558A/en
PROBLEM TO BE SOLVED: To reduce consumption power that is consumed at an input part such as an operation switch even when operation of an electronic device is stopped in a low power consumption state.SOLUTION: A control device includes: an operation input part pulling up or down a signal supplied from an operation part; a control part executing a predetermined operation according to the signal supplied via the operation input part; and a consumption power control part controlling the control part not to executed the above described predetermined operation in accordance with supplied electric power and the operation input part not to pull up or down the signal.
The present invention relates to a control device, an electronic device, a timepiece device, and a control method.
Electronic devices, such as watches, that have built-in power generators (primary power supplies) and secondary batteries (secondary power supplies) such as solar cells, are replaced by charging the secondary battery with the power generated by the power generator. Works without the need for These electronic devices operate with power supplied from a charged secondary battery when the power generation device is not generating power. Therefore, when the state where the power generation device is not generating power continues for a long time, the secondary battery continues to discharge the charged power, and when the discharge is continued, the secondary battery enters an overdischarged state. When the secondary battery is in an overdischarged state, even if power generation by the power generation device is started, the secondary battery is not immediately charged to a power capacity at which the electronic device can operate. Therefore, even if the power generation of the power generation apparatus is started, the electronic device cannot start operation immediately.
For this reason, in an electronic device, in order to suppress the power consumption of a secondary battery with a limited capacity, there is a technique for detecting a state where the power generation device is not generating power and making a transition to a low power consumption state.
For example, in an electronic device, the power generation detection circuit detects a non-power generation state where the power generation device is not generating power. When the non-power generation state continues for a predetermined time or longer, the electronic device can change the power consumption of the secondary battery from the operation power state in which the normal operation is performed to the low power consumption state in which the normal operation is stopped. Is disclosed (see Patent Document 1).
JP 2000-230988 A
However, the electronic device includes an input unit through which a signal is input from an operation switch (operator) or the like as an external input. Then, in an input unit such as an operation switch, the connection state of the operation switch is detected by pulling down or pulling up. Therefore, even if the operation of the electronic device is stopped by changing to the low power consumption state, there is a problem that power is consumed in the input unit such as the operation switch and the power of the secondary battery is consumed. For example, a crown switch in a watch continues to be in a disconnected state (push-in state) or in a conductive state (drawn state). Therefore, current may always flow to the power supply depending on the operating state of the crown switch.
The present invention has been made in view of such circumstances, and an object thereof is to reduce power consumption that is consumed in an input unit such as an operation switch even when operation of an electronic device is stopped in a low power consumption state. An object of the present invention is to provide a control device, an electronic device, a timepiece device, and a control method that reduce power consumption and suppress power consumption.
SUMMARY An advantage of some aspects of the invention is that an input unit that pulls down or pulls up a signal input from an operator and the input unit are input to the input unit. A control unit that executes a predetermined operation according to the signal and a control that does not cause the control unit to execute the predetermined operation according to a state of supplied power, and pulls down the input unit Alternatively, the control device includes a power consumption control unit that performs control to prevent pull-up.
In addition, according to one aspect of the present invention, in the above-described control device, whether or not a secondary power supply unit that is charged by an electromotive force generated by the primary power supply unit is in a non-charged state that is not being charged by the primary power supply unit. It has a charge detection unit to detect,
The power consumption control unit
When it is determined by the charge detection unit that the secondary power supply unit is in a non-charged state,
The control unit is controlled not to execute the predetermined operation, and is changed to a low power consumption state in which the input unit is controlled not to be pulled down or pulled up.
According to another aspect of the present invention, in the control device, the power consumption control unit is detected by the charge detection unit as not being in the non-charged state when the power consumption control unit is in the low power consumption state. In this case, the control unit is controlled to execute the predetermined operation, and at the same time, a transition is made to a normal operation state in which the input unit is controlled to pull down or pull up.
Further, according to one aspect of the present invention, in the above control device, when the power consumption control unit determines that the battery is not in the non-charge state, the transition to the normal operation state by the power consumption control unit is output from the input unit. It is performed based on the output signal to be performed.
According to another aspect of the present invention, the control device includes a voltage detection unit that detects a voltage of the secondary power supply unit, and the low power consumption state by the power consumption control unit when not in the low power consumption state. Transition to is performed only when the charge detection unit detects that the secondary power supply unit is not in the non-charged state and the detected voltage of the secondary power supply unit is equal to or lower than a predetermined threshold value. It is characterized by.
Further, according to one aspect of the present invention, in the above control device, the power consumption control unit is configured such that the power state is the non-charge state and the non-charge state continues for a predetermined time or more. In this case, a transition is made to the low power consumption state.
Further, according to one aspect of the present invention, in the control device, the power consumption control unit is a state in which a signal corresponding to a predetermined operation is input from the operator, and the state of the power is When the battery is in the non-charged state and the non-charged state continues for a predetermined time or longer, the state is changed to the low power consumption state.
According to another aspect of the present invention, in the above control device, the control unit includes an oscillation circuit control unit that oscillates and generates a basic clock that is supplied with the power and used for the operation of the control unit. The power control unit controls the control unit not to execute the predetermined operation when the oscillation of the basic clock that is oscillated in response to the supply of power is stopped. It is characterized in that a transition is made to a low power consumption state in which control is performed so that the part is not pulled down or pulled up.
In one embodiment of the present invention, in the above control device, when the power consumption control unit is in the low power consumption state, the power potential difference is a lower limit at which the oscillation circuit control unit can oscillate a basic clock. It is determined whether or not a potential difference greater than a potential difference greater than a potential difference greater than a potential difference, and when the potential difference of the power is greater than or equal to a potential difference greater than a potential difference greater than the lower limit voltage in the oscillation control unit, the control And a control for causing the unit to execute the predetermined operation, and a transition to a normal operation state in which the input unit is controlled to be pulled down or pulled up.
Further, according to one aspect of the present invention, in the control device, the input unit pulls down or pulls up the signal input from the operation element, and the low power consumption state. An output control unit configured to output the signal output to the control unit at a high level or a low level.
Further, according to one aspect of the present invention, in the control device, the output control unit of the input unit includes an AND circuit or a NAND circuit, and is input from the operator via the pull-down or pull-up unit. A signal is input to one input terminal of the AND circuit or the NAND circuit, an output of the AND circuit or the NAND circuit corresponds to an output of the input unit, and the power consumption control unit is in the low power consumption state. In this case, the other input terminal of the AND circuit or the NAND circuit is controlled to a low level.
Further, according to one aspect of the present invention, in the control device, the output control unit of the input unit includes a NOR circuit or an OR circuit, and is input from the operator via the pull-down or pull-up unit. When a signal is input to one input terminal of the NOR circuit or the OR circuit, the output of the NOR circuit or the OR circuit corresponds to the output of the input unit, and the power consumption control unit is in the low power consumption state The other input terminal of the NOR circuit or the OR circuit is controlled to a high level.
According to another aspect of the present invention, in the control device, the pull-down or pull-up unit of the input unit is the pull-down or pull-up unit that pulls down or pulls up using a MOSFET. The unit is configured to turn off the MOSFET in the low power consumption state.
In one embodiment of the present invention, in the above control device, the pull-down or pull-up unit of the input unit pulls down or pulls up using a MOSFET and a resistance element connected in series to the MOSFET. In the pull-up unit, the power consumption control unit turns off the MOSFET in the low power consumption state.
Further, according to one aspect of the present invention, in the control device, the operation element is connected to a conduction state in which one terminal and the other terminal of the operation element are connected to each other and is disconnected from each other in response to the operation. And switching.
Another embodiment of the present invention is an electronic device including the above-described control device.
Another embodiment of the present invention is a timepiece device including the above-described control device.
In one embodiment of the present invention, an input unit that pulls down or pulls up a signal input from an operator, and a control unit that performs a predetermined operation according to the signal input via the input unit A control method in a control device comprising: a power consumption control unit that controls the control unit not to perform the predetermined operation according to a state of supplied power; and the input unit The control method is characterized by comprising a procedure for performing control so as not to pull down or pull up.
According to the present invention, when the operation of the electronic device is stopped in the low power consumption state, control is performed so as not to pull down or pull up connected to the input unit such as the operation switch. Power consumption that is consumed by pulling down or pulling up can be reduced, and power consumption can be suppressed.
1 is a schematic block diagram illustrating a configuration of a timepiece device according to a first embodiment. It is a schematic block diagram which shows an example of the conventional operation input part. It is a schematic block diagram which shows an example of the operation input part in this 1st Embodiment. It is a flowchart which shows the power consumption control process in the 1st embodiment. It is a graph which shows an example of the state of the output voltage of the secondary battery 2 according to the power consumption control in the first embodiment. It is a schematic block diagram which shows the structure of the timepiece apparatus by this 2nd Embodiment. It is a schematic block diagram which shows an example of the operation input part in this 2nd Embodiment. It is a table | surface which shows the input / output terminal of an operation input part, and the control state of a pull-down. It is a timing chart which shows the operation | movement of an oscillation stop detection signal and a reset signal in a power consumption control part. It is a schematic block diagram which shows the structure of the timepiece apparatus by 3rd Embodiment. It is a schematic block diagram which shows an example of a structure of the power consumption control part by 3rd Embodiment. It is the table which put together the relationship between the present mode signal MD which is an internal signal of a power consumption control part, an input signal, and an output signal. It is a flowchart which shows the flow of a process of the timepiece device by 3rd Embodiment.
Hereinafter, a timepiece device 100 including a control device 200 according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic block diagram showing a configuration of a timepiece device 100 according to the first embodiment of the present invention.
In FIG. 1, the timepiece device 100 includes a solar cell 1 (primary power supply unit), a secondary battery 2 (secondary power supply unit), an operation unit 6 (operator), and a control device 200. The control device 200 includes a charge detection unit 3, a battery voltage detection unit 4, a power consumption control unit 5, an operation input unit 7 (input unit), and a control unit 10. The control unit 10 includes an oscillation circuit control unit 8 and a clock control unit 9. For example, the timepiece device 100 is an analog display type timepiece having a hand movement mechanism.
The solar cell 1 is a power generator that generates electromotive force by converting light energy into electrical energy. For this reason, the solar cell 1 changes the output power according to the amount of light that is input by being irradiated with light, and cannot output power in the dark when the light is not applied. The solar cell 1 outputs the generated electromotive force via the charge detection unit 3 and charges the secondary battery 2. In addition, the solar cell 1 supplies power for operating each part to each part of the timepiece device 100.
The secondary battery 2 is charged by the electromotive force of the solar battery 1 input from the solar battery 1 via the charge detection unit 3. The secondary battery 2 outputs power to the battery voltage detection unit 4 of the control device 200 and supplies power for operating each unit to each unit of the timepiece device 100.
The charge detection unit 3 detects whether or not the secondary battery 2 is in a non-charged state that is not being charged, based on the electromotive force generated by the solar battery 1. For example, when the output voltage (output potential difference) of the solar battery 1 is compared with the output voltage (output potential difference) of the secondary battery 2, and the output voltage of the solar battery 1 is equal to or lower than the output voltage of the secondary battery 2, the solar battery 1, it is detected that the secondary battery 2 is in a non-charged state that is not being charged. Further, when the output voltage of the solar battery 1 is higher than the output voltage of the secondary battery 2, the solar battery 1 detects that the secondary battery 2 is in a charged state that is not in a non-charged state. The charge detection unit 3 outputs the detected non-charge state or charge state result to the power consumption control unit 5.
In the non-charged state, since the output voltage of the solar battery 1 is equal to or lower than the output voltage of the secondary battery 2, the charge detection unit 3 prevents current from flowing from the secondary battery 2 to the solar battery 1. A backflow prevention element is provided.
The battery voltage detection unit 4 detects the output voltage of the secondary battery 2 according to a sampling signal for detecting the battery voltage input from the power consumption control unit 5. When the battery voltage detection unit 4 detects a state in which the output voltage of the secondary battery 2 is equal to or less than a predetermined threshold value, the battery voltage detection unit 4 outputs the detected result to the power consumption control unit 5.
The operation unit 6 is an operation switch that is operated when the user controls the timepiece device 100. The operation unit 6 outputs a signal from the operation switch to the operation input unit 7. In response to the operation, the operation unit 6 switches between a conductive state in which one terminal and the other terminal of the operation switch are connected and a disconnected state in which the terminal is not connected, thereby maintaining each state. For example, a crown switch is in a shut-off state when it is pushed in, is in a conductive state when pulled out, and is kept in a cut-off state or a conductive state until it is switched by the next operation. .
The operation input unit 7 pulls down or pulls up a signal input from the operation switch of the operation unit 6 and outputs the signal to the clock control unit 9. When the operation switch of the operation unit 6 is in the shut-off state, the operation input unit 7 determines the signal level by pulling down or pulling up.
Further, the operation input unit 7 switches whether to pull down or pull up based on a control signal from the power consumption control unit 5, and when not pulling down or pulling up, controls the signal of the high level or the low level in a clock manner. To the unit 9.
The control unit 10 includes an oscillation circuit control unit 8 and a clock control unit 9, and a predetermined clock according to a signal input via the operation input unit 7 when a user operates an operation switch of the operation unit 6. Perform the action.
The oscillation circuit control unit 8 oscillates and generates a basic clock signal used for timing. The oscillation circuit control unit 8 supplies the generated basic clock signal to the timepiece control unit 9. The oscillation circuit control unit 8 has a constant voltage circuit that supplies a power supply voltage for operating a circuit that oscillates and generates a basic clock signal. The oscillation circuit control unit 8 stops the oscillation of the basic clock signal when the operation of the constant voltage circuit is stopped, and starts the oscillation of the basic clock signal when the operation of the constant voltage circuit is started. The oscillation circuit control unit 8 controls the operation of the constant voltage circuit of the oscillation circuit control unit 8 based on the oscillation circuit control signal input from the power consumption control unit 5, and oscillates the basic clock signal and stops oscillation. And are controlled.
Based on the basic clock signal supplied from the oscillation circuit control unit 8, the timepiece control unit 9 executes a timekeeping operation for measuring time, control of a hand movement operation for displaying time, and the like. When the user operates the operation unit 6, the clock control unit 9 receives a signal input from the operation unit 6 through the operation input unit 7. The timepiece control unit 9 detects the input signal and controls the timepiece operation based on the detected result. In addition, the timepiece control unit 9 outputs information based on the detection result of the signal input from the operation unit 6, information based on the time measuring operation, and the like to the power consumption control unit 5.
For example, when the user performs an operation of pulling out the crown switch, the timepiece control unit 9 executes control for stopping the hand movement operation. Next, the user adjusts the time by adjusting the position of the hands of the clock by rotating the crown switch. Then, when the operation of returning the crown switch to the pushed-in state is performed, the timepiece control unit 9 executes control for starting the stopped hand movement operation based on the timekeeping operation for measuring the time, and adjusts the timepiece of the adjusted timepiece The hand movement is started from the position of.
When the oscillation of the basic clock signal supplied from the oscillation circuit control unit 8 is stopped, the timepiece control unit 9 stops its operation.
The power consumption control unit 5 outputs a sampling signal for detecting the output voltage of the secondary battery 2 to the battery voltage detection unit 4. And the detection result by the charge detection part 3 and the detection result by the battery voltage detection part 4 are each input into the power consumption control part 5. FIG. Based on the input detection results, the power consumption control unit 5 outputs control signals for controlling the operations to the control unit 10 and the operation input unit 7. The power consumption control unit 5 controls the control unit 10 not to execute a predetermined operation (predetermined operation) according to the state of the power supplied to the timepiece device 100, and controls the operation input unit 7. Transition to a low power consumption state in which pull-down or pull-up control is performed.
Here, the state of power supplied to the timepiece device 100 is a state of power based on the detection result by the charge detection unit 3 or the detection result by the battery voltage detection unit 4. The low power consumption state means that the oscillation circuit control unit 8 of the control unit 10 stops oscillation of the basic clock signal and the operation of the timepiece control unit 9 stops. The input signal is not pulled down or pulled up.
The power consumption control unit 5 determines whether or not the secondary battery 2 is in a non-charged state where the secondary battery 2 is not being charged based on the electromotive force generated by the solar cell 1 based on the input detection result by the charge detection unit 3. . Moreover, based on the detection result by the battery voltage detection part 4, it is determined whether the output voltage of the secondary battery 2 is below a predetermined threshold value.
For example, the power consumption control unit 5 causes the timepiece device 100 to transition to the low power consumption state based on any of the following conditions.
(1) When the secondary battery 2 is in a non-charged state, the power consumption control unit 5 causes the timepiece device 100 to transition to a low power consumption state.
(2) The power consumption control unit 5 sets the timepiece device 100 to the low power consumption state when the secondary battery 2 is in a non-charged state and the output voltage of the secondary battery 2 is equal to or lower than a predetermined threshold value. Transition.
(3) When the secondary battery 2 is in the non-charged state and the non-charged state of the secondary battery 2 continues for a predetermined time or longer, the power consumption control unit 5 Transition to.
(4) The power consumption control unit 5 is in a state where a signal corresponding to a predetermined operation is input from the operation unit 6, the secondary battery 2 is in a non-charged state, and the secondary battery 2 When the non-charge state continues for a predetermined time or longer, the timepiece device 100 is shifted to the low power consumption state.
Here, the state in which a signal corresponding to a predetermined operation is input from the operation unit 6 is, for example, a state in which a crown switch is pulled out.
Moreover, the power consumption control part 5 determines whether it is a non-charging state based on the detection result by the charge detection part 3, when it is in a low power consumption state. The power consumption control unit 5 controls the control unit 10 to execute a predetermined operation (predetermined operation) when not in a non-charged state, that is, in a charged state, and pulls down or pulls down the operation input unit 7 Transition to the normal operation state where the control is performed to be up. Here, the normal operation state means that the oscillation circuit control unit 8 oscillates and outputs a basic clock signal, the clock control unit 9 operates, and the operation input unit 7 receives a signal input from the operation unit 6. Pull-down or pull-up state.
Note that when the power consumption control unit 5 determines whether or not the output voltage of the secondary battery 2 is equal to or lower than a predetermined threshold based on the detection result by the battery voltage detection unit 4, a predetermined value is set. The threshold value is a predetermined high voltage with respect to the lower limit voltage at which the timepiece control unit 9 can execute the hand movement operation.
Note that, when measuring the elapsed time of the non-charged state under the condition for transition to the low power consumption state described above, the power consumption control unit 5 is in the non-charged state based on the detection result of the charge detection unit 3. Measurement may be started from the determined time. Alternatively, the power consumption control unit 5 may output the result of determining that it is in the non-charge state based on the detection result of the charge detection unit 3 to the timepiece control unit 9 and measure the timepiece control unit 9.
In addition, when determining by comparing the elapsed time of the non-charged state with a predetermined time, the power consumption control unit 5 is based on the result of the elapsed time measured by the power consumption control unit 5 or the clock control unit 9. May be determined by comparing with a predetermined time. Alternatively, based on the result of the elapsed time measured by the power consumption control unit 5 or the timepiece control unit 9, the timepiece control unit 9 may make a comparison with a predetermined time.
Note that when the state in which a signal corresponding to a predetermined operation is input from the operation unit 6 is set as a condition for shifting to the low power consumption state, the clock control that detects the signal input from the operation input unit 7 The unit 9 may make a determination based on the detection result. Alternatively, the timepiece control unit 9 that has detected the signal input from the operation input unit 7 outputs the detection result to the power consumption control unit 5. And the power consumption control part 5 may determine based on the input detection result.
Next, the operation unit 6 and the operation input unit 7 will be described with reference to FIGS. 2 and 3.
FIG. 2 is a schematic block diagram showing an embodiment of a conventional operation input unit 7 to which the first embodiment is not applied. FIG. 3 is a schematic block diagram showing one form of the operation input unit 7 in the first embodiment. 2 and 3, the power supply VSS is a negative power supply, and the power supply VDD is the ground GND. The operation unit 6 and the operation input unit 7 are supplied with a voltage (potential difference) between the power supply VSS and the power supply VDD.
The operation unit 6 illustrated in FIGS. 2 and 3 includes a switch 61. One end of the connection terminal of the switch 61 is connected to the power supply VDD, and the other end is connected to the terminal I 1 of the operation input unit 7. Further, according to the switch 61 being operated, each state is maintained by switching between a conductive state in which one end and the other end of the connection terminal of the switch 61 are connected and a disconnected state in which the switch 61 is not connected.
Next, the operation input unit 7 shown in FIG. 2 will be described.
The operation input unit 7 includes a pull-down or pull-up unit 70 and an output control unit 72. The pull-down or pull-up unit 70 pulls down or pulls up the signal input from the operation unit 6. A pull-down or pull-up unit 70 shown in FIG. 2 is configured to pull down a signal input from the operation unit 6.
A signal input from the terminal I1 of the operation input unit 7 is input to the output control unit 72 via the pull-down or pull-up unit 70, and is output from the output control unit 72 to the terminal OT1. The pull-down or pull-up unit 70 includes an NMOSFET (N-channel metal oxide semiconductor field effect transistor) 71 for pull-down, and the output control unit 72 includes a buffer 73.
The input terminal I1 is connected to the input terminal of the buffer 73, and the output terminal of the buffer 73 is connected to the terminal OT1. The NMOSFET 71 has a drain terminal connected to a connection point between the terminal I1 and the input terminal of the buffer 73, a source terminal connected to the power supply VSS, and a gate terminal connected to the power supply VDD.
The NMOSFET 71 is in an ON state when the voltages of the power supply VDD and the power supply VSS are applied between the gate and the source. Therefore, the NMOSFET 71 is in a state in which the drain and the source are conductive with an on-resistance, and a current corresponding to the on-resistance flows into the power supply VSS and is pulled down.
When the switch 61 is conductive, the voltage of the power supply VDD is input to the terminal I1, and the voltage of the power supply VDD is output from the terminal OT1 via the pull-down by the NMOSFET 71 and the buffer 73. When the switch 61 is in the cutoff state, the signal level of the signal input from the terminal I1 is indefinite. Therefore, the signal input from the terminal I1 is pulled down by the NMOSFET 71 to become the voltage of the power supply VSS, and is output from the terminal OT1 via the buffer 73.
Next, the operation input unit 7 of the first embodiment shown in FIG. 3 will be described. In addition, in each part of FIG. 3, the same code | symbol is attached | subjected to the part corresponding to each part of FIG. 2, and the description is abbreviate | omitted suitably.
The operation input unit 7 illustrated in FIG. 3 includes a pull-down or pull-up unit 70 and an output control unit 72 as with the operation input unit 7 illustrated in FIG. The pull-down or pull-up NMOSFET 71 provided in the pull-up unit 70 has a gate terminal connected to the terminal I2. The output control unit 72 includes an AND circuit 74. In the AND circuit 74, one end of the input terminal is connected to a connection point between the terminal I1 and the drain terminal of the NMOSFET 71, and the other end of the input terminal is connected to the terminal I2. The output terminal of the AND circuit 74 is connected to the terminal OT1.
In the NMOSFET 71 shown in FIG. 3, on / off of the NMOSFET 71 is controlled by the signal level input to the terminal I2.
When the NMOSFET 71 is turned off and the switch 61 is in the cut-off state, the signal level of the signal input from the terminal I1 is indefinite. When a signal whose signal level is indefinite is output from the terminal OT1, when the output signal becomes an intermediate potential between the power supply VDD and the power supply VSS, a through current is generated in the output destination circuit. The circuit may be destroyed. Therefore, in a state where the NMOSFET 71 is turned off, a low level signal is input from the terminal I2 to the AND circuit 74, so that a low level signal is output from the terminal OT1.
For example, the power consumption control unit 5 outputs a low level signal in a low power consumption state, and outputs a high level signal in a normal operation state. The output signal is input to the terminal I2 of the operation input unit 7. In the low power consumption state, a low level signal is input to the terminal I2, so that the NMOSFET 71 is turned off and is not pulled down, and a low level signal is input to the AND circuit 74. Is output from the terminal OT1. In the normal operation state, when a high level signal is input to the terminal I 2, the NMOSFET 71 is turned on and pulled down, and a high level signal is input to the AND circuit 74. As a result, the signal input from the terminal I1 is pulled down by the NMOSFET 71, and the pulled-down signal is output from the terminal OT1.
FIG. 4 is a flowchart illustrating an example of the power consumption control process in the first embodiment. FIG. 4 shows that the power consumption control unit 5 displays the timepiece device 100 when the detection result by the charge detection unit 3 is in a non-charged state and the output voltage of the secondary battery 2 is equal to or lower than a predetermined threshold value. Shows a process of transitioning to a low power consumption state.
Hereinafter, the power consumption control process of the timepiece device 100 will be described with reference to the flowchart shown in FIG.
First, the power consumption control unit 5 outputs a sampling signal for detecting the battery voltage at regular time intervals to the battery voltage detection unit 4 and detects the output voltage of the secondary battery 2 in the battery voltage detection unit 4. Let The battery voltage detection unit 4 detects the output voltage of the secondary battery 2 according to the sampling signal input from the power consumption control unit 5. When the battery voltage detection unit 4 detects a state in which the output voltage of the secondary battery 2 is equal to or lower than a predetermined threshold, the battery voltage detection unit 4 outputs the detected result to the power consumption control unit 5 (step S101).
Next, the power consumption control unit 5 determines whether or not the output voltage of the secondary battery 2 is equal to or lower than a predetermined value (predetermined threshold value) based on the detection result by the battery voltage detection unit 4 (step). S102). If it is determined in step 102 that the output voltage of the secondary battery 2 is equal to or less than a predetermined value (a predetermined threshold) (YES), the process proceeds to step S103. If it is determined that the output voltage of the secondary battery 2 is higher (NO) than a predetermined value (a predetermined threshold value), the process returns to step 101.
Next, in step 103, the power consumption control unit 5 determines whether or not the secondary battery 2 is in a non-charged state that is not being charged based on the result detected by the charge detection unit 3.
The charge detection unit 3 detects whether or not the secondary battery 2 is in a non-charged state that is not being charged, based on the electromotive force generated by the solar battery 1. For example, the charge detection unit 3 compares the output voltage (output potential difference) of the solar battery 1 with the output voltage (output potential difference) of the secondary battery 2, and the output voltage of the solar battery 1 is equal to or lower than the output voltage of the secondary battery 2. In this case, the solar battery 1 detects that the secondary battery 2 is in a non-charged state that is not being charged. When the output voltage of the solar battery 1 is higher than the output voltage of the secondary battery 2, the charge detection unit 3 detects that the secondary battery 2 is in a charged state that is not in a non-charged state.
Next, the power consumption control unit 5 determines whether or not the secondary battery 2 is in a non-charged state that is not being charged based on the detection result by the charge detection unit 3 (step S104). If it is determined in step 104 that the secondary battery 2 is in a non-charging state (YES) that is not being charged, the process proceeds to step S105. If it is determined that the secondary battery 2 is in a charging state (NO) that is not a non-charging state, the process returns to step 101.
Next, when it is determined in step S104 that the secondary battery 2 is in a non-charging state (YES) that is not being charged, the power consumption control unit 5 performs control for causing the timepiece device 100 to transition to the low power consumption state. The signal is output to the operation input unit 7 and each unit of the control unit 10 (step S105).
Next, in step S106, the operation input unit 7 does not pull down or pull up the signal input from the operation unit 6 in accordance with the control signal for transition to the low power consumption state output from the power consumption control unit 5. Controlled by the state.
Further, a high level signal or a low level signal is output from the operation input unit 7 to the timepiece control unit 9 in accordance with a control signal for transition to the low power consumption state output by the power consumption control unit 5. Thereby, in the operation input part 7, the electric power consumed is reduced by not pulling down or pulling up.
Next, control for stopping the operation of each unit in the control unit 10 is executed in accordance with a control signal for transition to the low power consumption state output by the power consumption control unit 5.
In step S107, the operation of the timepiece control unit 9 is stopped in response to the control signal for transition to the low power consumption state output by the power consumption control unit 5. For example, in the timepiece control unit 9, the hand movement operation for displaying the time is stopped according to the input control signal for shifting to the low power consumption state.
Next, in step S108, the oscillation of the basic clock of the oscillation circuit control unit 8 is stopped according to the control signal for transition to the low power consumption state output by the power consumption control unit 5. The oscillation circuit control unit 8 stops the oscillation of the basic clock signal by stopping the operation of the constant voltage circuit in response to the input control signal for shifting to the low power consumption state. Since the oscillation of the basic clock signal of the oscillation circuit control unit 8 is stopped, the timekeeping operation of the timepiece control unit 9 is stopped. Therefore, in the timepiece device 100, since the operations of the timepiece control unit 9 and the oscillation circuit control unit 8 are stopped, the power consumed for each operation is reduced.
As described above, the power consumption control unit 5 stops the operations of the timepiece control unit 9 and the oscillation circuit control unit 8 and does not pull down or pull up the signal input from the operation unit 6 in the operation input unit 7. By setting the state, the timepiece device 100 is shifted to the low power consumption state.
Next, the power consumption control unit 5 determines whether or not the secondary battery 2 is in a non-charged state that is not being charged based on the detection result by the charge detection unit 3 (step S109). If it is determined in step S109 that the secondary battery 2 is in a charged state (NO) that is not a non-charged state, the process proceeds to step S110. If it is determined that the secondary battery 2 is in a non-charging state (YES) that is not being charged, the process of step S109 is repeatedly executed, and the low power consumption state is continued.
Next, when it is determined in step S109 that the secondary battery 2 is in a charged state (NO) that is not in a non-charged state, the power consumption control unit 5 controls the control signal for causing the timepiece device 100 to transition to the normal operating state. Are output to the operation input unit 7 and each unit of the control unit 10 (step S110).
Next, in step S111, the basic clock of the oscillation circuit control unit 8 is oscillated according to the control signal output from the power consumption control unit 5 for transition to the normal operation state. In the oscillation circuit control unit 8, the oscillation of the basic clock signal is started by starting the operation of the constant voltage circuit in response to the input control signal for transition to the normal operation state.
Next, in step S112, the operation of the timepiece control unit 9 is started in response to the control signal for transition to the normal operation state output from the power consumption control unit 5. For example, in the timepiece control unit 9, a hand movement operation for displaying time is started in response to the input control signal for transition to the normal operation state.
Next, in step S113, the operation input unit 7 pulls down or pulls down the signal input from the operation unit 6 in accordance with the control signal for transition to the low power consumption state output by the power consumption control unit 5. Controlled to up state.
In addition, a signal obtained by pulling down or pulling up the signal input from the operation unit 6 according to the control signal for transitioning to the low power consumption state output from the power consumption control unit 5 is output from the operation input unit 7 to the clock control unit. 9 is output.
Next, the process returns to step S101, and the processes from step S101 to step S113 are executed.
FIG. 5 is a graph showing an example of the state of the output voltage of the secondary battery 2 according to the power consumption control in the first embodiment. The horizontal axis of the graph shown in FIG. 5 is time t, and the vertical axis is voltage V.
FIG. 5A shows the secondary battery 2 when the present invention is not applied, in which only the control unit 10 is stopped in the low power consumption state (the oscillation circuit control unit 8 and the clock control unit 9 are stopped). Indicates the output voltage. 5 (b) and 5 (c) show two cases when the control unit 10 is stopped and the operation input unit 7 is controlled not to be pulled down or pulled up in the low power consumption state. The output voltage of the secondary battery 2 is shown. In the graph shown in FIG. 5, when the power consumption control unit 5 detects that the detection result by the charge detection unit 3 is in a non-charged state and the output voltage of the secondary battery 2 is equal to or lower than a predetermined threshold value, It is an example about the case where the timepiece apparatus 100 is changed to a low power consumption state.
First, FIG. 5A and FIG. 5B will be described.
In a period ST1 from time 0 to time T1, it is a normal operation state. In addition, the period ST1 is a state where the solar cell 1 is not irradiated with light and cannot generate power, and the secondary battery 2 is in a non-charged state. Since there is no difference in power consumption depending on the operation states of FIGS. 5A and 5B in the period ST1, the secondary battery 2 of FIGS. 5A and 5B similarly consumes power. Then, the output voltage of the secondary battery 2 similarly decreases.
At time T1, the output voltage of the secondary battery 2 shown in FIGS. 5A and 5B is a predetermined threshold voltage Vc for the battery voltage detection unit 4 to detect. Therefore, the battery voltage detection unit 4 detects that the output voltage of the secondary battery 2 is equal to or lower than a predetermined threshold voltage Vc. The power consumption control unit 5 makes the transition from the normal operation state to the low power consumption state because the output voltage of the secondary battery 2 is equal to or lower than a predetermined threshold voltage Vc and the secondary battery 2 is in a non-charged state. .
In a period ST2 from time T1 to time T2, the battery is in a low power consumption state and the secondary battery 2 is in a non-charged state. Since the period ST2 is in the low power consumption state, the power consumption of the secondary battery 2 is reduced compared to the period ST1, and the amount of voltage decrease as the time of the output voltage of the secondary battery 2 elapses is This is smaller than the period ST1. Further, in the period ST2, there is a difference in power consumption due to the low power consumption states of FIGS. 5 (a) and 5 (b). 5A, in the low power consumption state of FIG. 5B, the operation input unit 7 is controlled not to be pulled down or pulled up. It is further reduced. Therefore, at time T2, the amount of decrease in the output voltage V2 of the secondary battery 2 in FIG. 5B is small with respect to the output voltage V1 of the secondary battery 2 in FIG. 5A, and the voltage V1 <voltage V2. .
Next, at time T2, the solar battery 1 is irradiated with light and power generation is started, whereby the secondary battery 2 is changed from a non-charged state to a charged state. Based on the result of detecting that the charge detection unit 3 is not in the non-charge state, the power consumption control unit 5 makes a transition from the low power consumption state to the normal operation state. In a period ST3 after time T2, the secondary battery 2 is in a normal operation state and in a charged state. In the period ST3, since the secondary battery 2 is in a charged state, the output voltage of the secondary battery 2 is charged as time elapses until it reaches the full charge voltage Vf.
Here, normal operation can be started immediately from the low power consumption state in the period ST2 in response to the charging state at time T2. This is because the output voltage of the secondary battery 2 is not overdischarged because it does not drop below the operation limit voltage Vm. That is, when the output voltage of the secondary battery 2 becomes equal to or lower than the threshold voltage Vc that is a predetermined voltage higher than the operation limit voltage Vm (time T1), the transition to the low power consumption state and the period By reducing the power consumption of the secondary battery 2 in the low power consumption state in ST2, the secondary battery 2 is prevented from being overdischarged.
Further, as the threshold voltage Vc is increased, the time during which normal operation can be continued by the secondary battery 2 decreases, so setting the threshold voltage Vc too high is not beneficial to the user. Therefore, further reducing the power consumption of the secondary battery 2 in the low power consumption state is effective for preventing the secondary battery 2 from being overdischarged.
At time T2, the relationship between the output voltage V1 of the secondary battery 2 in FIG. 5A and the output voltage V2 of the secondary battery 2 in FIG. 5B is such that voltage V1 <voltage V2. FIG. 5B indicates that the elapsed time until the output voltage of the secondary battery 2 reaches the operation limit voltage Vm is longer than that in FIG.
Next, FIG. 5C will be described. FIG. 5C shows the output voltage of the secondary battery 2 when the period ST2 of FIG. 5B is continued after time T2. The output voltage of the secondary battery 2 in FIG. 5B is the voltage V2 at time T2, but when the period ST2 is continued after time T2, the output voltage of the secondary battery 2 is lower than the voltage V2. I will do it. FIG. 5C shows the output voltage of the secondary battery 2 when the period ST2 is continued until the output voltage of the secondary battery 2 in FIG. 5B decreases to the voltage V1. At time T3, the output voltage V3 of the secondary battery 2 in FIG. 5C is equal to the output voltage V1 of the secondary battery 2 in FIG. 5A at time T2. Therefore, in FIG. 5C, as compared with FIG. 5A, when the period ST2 continues for a long time, the period until the output voltage of the secondary battery 2 decreases to the operation limit voltage Vm is extended. It is shown that.
As described above, according to the first embodiment, the operation of the timepiece device 100 is stopped in the low power consumption state, and the NMOSFET 71 connected to the input unit such as the operation switch is further pulled down or pulled up. Therefore, power consumption that is consumed by pulling down or pulling up in an input unit such as an operation switch can be reduced, and power consumption can be suppressed.
In the first embodiment, an example in which the output control unit 72 of the operation input unit 7 includes the AND circuit 74 is illustrated in FIG. 3, but a NAND circuit may be included instead of the AND circuit 74. For example, when the output control unit 72 includes a NAND circuit, a signal input from the operation unit 6 via the pull-down or pull-up unit 70 is input to one input terminal of the NAND circuit, and the power consumption control unit 5 The control signal may be input to the other input terminal. In the case of the low power consumption state, the power consumption control unit 5 controls the control signal to low level, so that the output signal of the NAND circuit, that is, the signal output from the operation input unit 7 to the control unit 10 is set to high level. It is possible to prevent the signal level from becoming indefinite.
Further, the output control unit 72 of the operation input unit 7 is not limited to this, and may include an OR circuit, a NOR circuit, or a circuit in which various logic circuits are combined. In the case of the low power consumption state, the power consumption control unit 5 controls the operation input unit 7 by inputting a low level or high level control signal corresponding to various logic circuits included in the output control unit 72. The signal output to the unit 10 may be set to a low level or a high level to prevent the signal level from becoming indefinite.
In the first embodiment, FIG. 3 shows an example in which the pull-down or pull-up unit 70 of the operation input unit 7 includes a pull-down or pull-up MOSFET. For example, the pull-down or pull-up unit 70 of the operation input unit 7 includes a resistor that pulls down or pulls up, and a transistor circuit that is connected in series to the resistor and switches between connection and disconnection of the connection. May be provided. Thereby, the power consumption control unit 5 may control whether to pull down or pull up in accordance with controlling on (conduction) and off (cutoff) of the transistor circuit.
The timepiece device 100 according to the first embodiment has been described by taking an analog display type timepiece as an example, but may be a digital display type timepiece. Further, the timepiece device 100 according to the first embodiment has been described. However, instead of the timepiece device 100, a power source voltage is supplied from the power generation unit 1 and the secondary battery 2 to perform a predetermined operation (predetermined operation). It may be an electronic device.
Hereinafter, a timepiece device 100 including a control device 200 according to a second embodiment of the present invention will be described with reference to the drawings. FIG. 6 is a schematic block diagram showing the configuration of the timepiece device 100 according to the second embodiment of the present invention. In the second embodiment, the control device 200 detects the stop of oscillation of the basic clock used for the operation of the control unit 10 and the voltage (potential difference) of the supplied power, and based on the detected result, the operation input The unit 7 controls whether to pull down or pull up. In FIG. 6, the same reference numerals are given to the portions corresponding to those in FIG. 1, and description thereof will be omitted as appropriate.
In FIG. 6, the timepiece device 100 includes a solar cell 1 (primary power supply unit), a secondary battery 2 (secondary power supply unit), a backflow prevention circuit 31, an operation unit 6 (operator), an LCD (Liquid Crystal Display) 25, And a control device 200. For example, the clock device 100 is a digital display type clock that displays the time on the LCD 25. The backflow prevention circuit 31 is connected between the solar cell 1 and the secondary battery 2 when the output voltage (output potential difference) of the solar cell 1 is in a non-charged state equal to or lower than the output voltage (output potential difference) of the secondary battery 2. Shut off the continuity. Thereby, the backflow prevention circuit 31 prevents a current from flowing back from the secondary battery 2 to the solar battery 1. The backflow prevention circuit 31 corresponds to the backflow prevention element provided in the charge detection unit 3 of FIG.
The control device 200 includes a power consumption control unit 5, an operation input unit 7 (input unit), a control unit 10, an overcharge prevention circuit 15, an illuminance detection circuit 16, a step-down circuit 17, and a remaining battery level detection circuit 20. . The overcharge prevention circuit 15 is a circuit that prevents overcharge from the solar battery 1 to the secondary battery 2. When the output voltage of the secondary battery 2 becomes equal to or higher than a preset voltage, the overcharge prevention circuit 15 starts from the solar battery 1. Stop charging. The illuminance detection circuit 16 detects the illuminance of the light applied to the solar cell 1 and outputs a signal indicating the detected illuminance to the control unit 10. The step-down circuit 17 steps down and supplies the output voltage of the secondary battery 2 to each power supply circuit that supplies power to each part of the timepiece device 100. The remaining battery level detection circuit 20 detects the output voltage of the secondary battery 2 and outputs a signal indicating the remaining battery level to the control unit 10.
The control unit 10 includes an oscillation circuit control unit 8, an LCD boost power supply circuit 18, a logic constant voltage circuit 19, a clock control unit 9, and a display drive circuit 24.
The oscillation circuit control unit 8 includes an oscillation constant voltage circuit 81, a crystal oscillation circuit 82, and a frequency divider circuit 83. The oscillation constant voltage circuit 81 generates constant voltage power from the power supplied from the step-down circuit 17 and supplies it to the crystal oscillation circuit 82. The oscillation circuit control unit 8 oscillates and generates a basic clock signal used for time measurement by the power supplied from the oscillation constant voltage circuit 81. That is, the oscillation circuit control unit 8 stops the oscillation of the basic clock signal when the supply of power from the oscillation constant voltage circuit 81 is stopped, and the basic clock when the supply of power from the oscillation constant voltage circuit 81 is started. Start signal oscillation.
Then, the oscillation circuit control unit 8 outputs the generated basic clock signal to the timepiece control unit 9. The frequency divider 83 divides and outputs the basic clock signal generated by the crystal oscillation circuit 82. The clock signal divided by the frequency dividing circuit 83 is input to the step-down circuit 17, the LCD step-up power supply circuit 18, and the logic constant voltage circuit 19 as a clock signal for generating respective output voltages. Further, the frequency-divided clock signal is input to the power consumption control unit 5.
The LCD boosting power supply circuit 18 generates a voltage necessary for driving the LCD 25 and the display driving circuit 24 from the power supplied from the step-down circuit 17. The LCD boosting power supply circuit 18 supplies the generated voltage power to the LCD 25 and the display driving circuit 24. The logic constant voltage circuit 19 mainly generates a logic voltage necessary for driving the timepiece control unit 9 from the power supplied from the step-down circuit 17. The logic constant voltage circuit 19 supplies the generated voltage power to the timepiece control unit 9 and other logic circuits.
The display drive circuit 24 is a drive circuit that drives the display operation of the LCD 25. The timepiece control unit 9 displays the time measured based on the basic clock signal supplied from the oscillation circuit control unit 8 on the LCD 25 via the display drive circuit 24. In addition, a signal indicating the illuminance detected by the illuminance detection circuit 16 is input to the timepiece control unit 9. For example, the clock control unit 9 changes the display content or display brightness of the LCD 25 based on the detected illuminance. Further, the timepiece control unit 9 displays, for example, a display indicating the remaining battery level of the secondary battery 2 via the display driving circuit 24 based on the signal indicating the remaining battery level input from the remaining battery level detection circuit 20. Displayed on the LCD 25.
The power consumption control unit 5 includes an oscillation stop detection circuit 51 and a reset circuit 52. The oscillation stop detection circuit 51 receives the clock signal frequency-divided from the frequency divider circuit 83 of the oscillation circuit control unit 8 and whether or not the oscillation circuit control unit 8 stops the oscillation operation based on the input clock signal. To detect. For example, when the oscillation stop control circuit 51 detects that the oscillation circuit control unit 8 has stopped the oscillation operation, the oscillation stop detection circuit 51 controls the oscillation stop detection signal to the Low level and outputs it to the reset circuit 52. On the other hand, when the oscillation stop control circuit 51 detects that the oscillation circuit control unit 8 has not stopped the oscillation operation, the oscillation stop detection circuit 51 controls the oscillation stop detection signal to the high level and outputs it to the reset circuit 52.
The reset circuit 52 controls the reset signal based on the oscillation stop detection circuit 51 and the output voltage of the secondary battery 2. For example, when the oscillation stop detection signal input from the oscillation stop detection circuit 51 becomes low level, the reset circuit 52 controls the reset signal to high level (reset). Further, in the state where the reset signal is controlled to be at a high level, the reset circuit 52 has an oscillation stop detection signal at a high level and the output voltage of the secondary battery 2 is equal to or higher than a predetermined threshold (second threshold). In this case, the reset signal is controlled from the high level to the low level (reset release). Here, the predetermined threshold value (second threshold value) is a voltage (potential difference) that is larger by a predetermined voltage (potential difference) than a lower limit voltage (potential difference) at which the oscillation circuit control unit 8 can oscillate the basic clock.
Then, the power consumption control unit 5 outputs a reset signal controlled by the reset circuit 52 to the timepiece control unit 9 and the operation input unit 7. That is, the power consumption control unit 5 outputs a High level reset signal from the reset circuit 52 to the timepiece control unit 9 and the operation input unit 7, thereby causing the timepiece device 100 to transition to the low power consumption state. On the other hand, the power consumption control unit 5 outputs a low level reset signal from the reset circuit 52 to the timepiece control unit 9 and the operation input unit 7, thereby transitioning the timepiece device 100 from the low power consumption state to the normal operation state.
When the input reset signal is at a low level, the timepiece control unit 9 is in a state in which the reset is released and performs an operation for controlling the timepiece device 100 (normal operation state). On the other hand, when the input reset signal is at a high level, the timepiece control unit 9 stops operation by being reset (low power consumption state). In addition, when the input reset signal is at a low level, the operation input unit 7 controls the signal input from the operation unit 6 to be pulled down or pulled up (normal operation state). On the other hand, when the input reset signal is at a high level, the operation input unit 7 controls the signal input from the operation unit 6 not to be pulled down or pulled up (low power consumption state).
That is, the power consumption control unit 5 performs control so that the clock control unit 9 of the control unit 10 does not execute a predetermined operation (predetermined operation) when the oscillation of the basic clock in the oscillation circuit control unit 8 stops. In the operation input unit 7, the signal input from the operation unit 6 is shifted to a low power consumption state in which control is performed not to pull down or pull up. In addition, when the timepiece device 100 is in the low power consumption state, the power consumption control unit 5 determines whether or not the output voltage of the secondary battery 2 is greater than or equal to the second threshold value. When the power consumption control unit 5 determines that the output voltage of the secondary battery 2 is equal to or higher than the second threshold value, the power consumption control unit 5 performs a predetermined operation (predetermined operation) on the timepiece control unit 9 of the control unit 10. In addition, the operation input unit 7 makes a transition to a normal operation state in which the signal input from the operation unit 6 is pulled down or pulled up.
Next, details of the operation input unit 7 of the second embodiment will be described with reference to FIG. FIG. 7 is a schematic block diagram showing one form of the operation input unit 7 in the second embodiment. In FIG. 7, the power supply VDD is a positive power supply and the power supply VSS is GND. The operation unit 6 and the operation input unit 7 are supplied with a voltage (potential difference) between the power supply VDD and the power supply VSS. In FIG. 7, the same reference numerals are given to the portions corresponding to those in FIGS. 2 and 3, and the description thereof will be omitted as appropriate.
Similar to the operation input unit 7 shown in FIG. 3, the operation input unit 7 shown in FIG. 7 includes a pull-down or pull-up unit 70 and an output control unit 72. As a difference from FIG. 3, in the pull-down or pull-up unit 70 of FIG. 7, two types of pull-down circuits are connected in parallel to the input from the operation unit 6. Specifically, in FIG. 7, the drain terminals of the two NMOSFETs 75 and 76 are connected to the terminal I1 via the resistors R1 and R2, respectively. Further, the output control unit 72 includes a NOR circuit 78. In the NOR circuit 78, one end of the input terminal is connected to a connection point between one end of each of the resistors R1 and R2 and the terminal I1, and the other end of the input terminal is connected to the terminal I2. The output terminal of the NOR circuit 78 is connected to the terminal OT1 and the gate terminal of the NMOSFET 76.
Further, the source terminals of the NMOSFETs 75 and 76 in FIG. 7 are respectively connected to the power source VSS similarly to the NMOSFET 71 in FIG. 3, but the connections of the gate terminals are different. The gate terminal of the NMOSFET 75 in FIG. 7 is connected to the output terminal of the inverting buffer 77, and the input terminal of the inverting buffer 77 is connected to the terminal I2. The gate terminal of the NMOSFET 76 is connected to the output terminal of the NOR circuit 78.
In other words, in the operation input unit 7 shown in FIG. 7, the on / off state of the NMOSFET 75 is controlled by the inverted level of the signal input to the terminal I2, and whether the pull-down is controlled by the resistor R1 is controlled. The Further, the ON / OFF of the NMOSFET 76 is controlled by the output level of the NOR circuit 78 based on the signal level input to the terminal I2 and the signal level input to the terminal I1, and whether or not to pull down by the resistor R2 is determined. Be controlled.
For example, the resistance values of the resistor R1 and the resistor R2 have a relationship of “resistance R1> resistance R2.” In addition, a reset signal is input from the reset circuit 52 of the power consumption control unit 5 to the terminal I2. Therefore, when the reset signal is controlled to the low level, that is, in the normal operation state where the reset is released, the NMOSFET 75 is controlled to be on, and the NMOSFET 76 is turned on and off depending on the signal level input to the terminal I1. Be controlled. Here, in the second embodiment, when the switch 61 provided in the operation unit 6 is in a pressed state, one terminal and the other terminal of the switch 61 are connected and are not pressed. The case will be described as a push switch type that enters a shut-off state in the case of a state. For example, when the push switch type switch 61 is not pressed in the operation unit 6 and the connection is cut off, a low level signal is input to the terminal I1, and the NMOSFET 76 is controlled to be turned on. Further, when the switch 61 is pressed in the operation unit 6 and the connection is in a conductive state, a high level signal is input to the terminal I1, and the NMOSFET 76 is controlled to be turned off.
That is, in the normal operation state, when the push switch type switch 61 is not pressed in the operation unit 6, the signal input from the operation unit 6 is pulled down by the combined resistance value of the resistor R1 and the resistor R2. It becomes. When the switch 61 is pressed in the operation unit 6, the signal input from the operation unit 6 is pulled down only by the resistor R1 having a resistance value higher than the combined resistance value of the resistors R1 and R2. It becomes a state. Therefore, in the operation input unit 7 shown in FIG. 7, in the normal operation, when the switch 61 is pressed, the power consumed by the pull-down is reduced compared to the state where the switch 61 is not pressed.
On the other hand, when the reset signal is controlled to the high level, that is, in the reset low power consumption state, the NMOSFET 75 and the NMOSFET 76 are both controlled to be off regardless of the state of the switch 61 of the operation unit 6. In other words, in the low power consumption state, the control that does not pull down regardless of the state of the switch 61 prevents the power from being consumed by the pull down. In this case, since the output of the NOR circuit 78 is controlled to the low level regardless of the state of the switch 61, the signal output from the terminal OT1 is prevented from being indefinite due to being not pulled down. Yes.
As described above, one mode of the operation input unit 7 of the second embodiment has been described with reference to FIG. 7. In FIG. 7, the configuration for controlling the on / off of the pull-down using the MOSFET uses a transistor circuit other than the FET. The pull-down on / off may be controlled. Further, the circuit that pulls down in the pull-down or pull-up unit 70 may be a circuit that pulls up.
FIG. 8 is a table showing input / output terminals and pull-down control states of the operation input unit 7 described with reference to FIG. As described above, when the reset signal input to the terminal I2 is controlled to the high level, the pull-down is turned off regardless of the state of the switch 61, and the output of the terminal OT1 is controlled to the low level. FIG. 8 shows this. On the other hand, FIG. 8 shows that when the reset signal input to the terminal I2 is controlled to the Low level, the pull-down and the output of the terminal OT1 are controlled by the state of the switch 61.
FIG. 9 is a timing chart showing operations of the oscillation stop detection signal and the reset signal in the power consumption control unit 5. An example of the power consumption control operation in the power consumption control unit 5 will be described with reference to FIG.
In a period ST1 from time t0 to time t1, the timepiece device 100 is in a normal operation state. The oscillation circuit control unit 8 oscillates the basic clock signal, and the oscillation stop detection signal is controlled to a high level. Further, the reset signal is controlled to the Low level, and the reset is released. At time t2, the output voltage of the secondary battery 2 falls below the oscillation operation lower limit voltage Vm2, so that the output voltage of the oscillation constant voltage circuit 81 falls, and the oscillation circuit control unit 8 stops the oscillation of the basic clock signal. Here, the oscillation operation lower limit voltage Vm2 is a lower limit voltage at which the oscillation circuit control unit 8 can oscillate the basic clock.
Then, the oscillation stop detection circuit 51 of the power consumption control unit 5 detects that the oscillation in the oscillation circuit control unit 8 has stopped, and controls the oscillation stop detection signal from High level to Low level. Then, the reset circuit 52 controls the reset signal from the Low level to the High level in response to the oscillation stop detection signal becoming the Low level at time t1 (time t2). That is, from time t1 to time t2, the power consumption control unit 5 changes the timepiece device 100 from the normal operation state to the low power consumption state.
In a period ST2 from time t2 to time t4, the timepiece device 100 is in a low power consumption state. At time t3, as the output voltage of the secondary battery 2 becomes higher than the oscillation operation lower limit voltage Vm2, the output voltage of the oscillation constant voltage circuit 81 recovers, and the oscillation circuit control unit 8 starts oscillation of the basic clock signal. .
At time t4, when the output voltage of the secondary battery 2 becomes equal to or higher than the second threshold value Vc2 (a voltage larger than a lower limit voltage capable of oscillating the basic clock in the oscillation circuit control unit 8), the reset is performed. The circuit 52 releases the reset by controlling the reset signal from the high level to the low level. That is, at time t4, the power consumption control unit 5 causes the timepiece device 100 to transition from the low power consumption state to the normal operation state. In a period ST3 after time t4, the timepiece device 100 is in a normal operation state.
As described above, according to the second embodiment, the power consumption control unit 5 controls the reset signal to make it in the low power consumption state in response to the oscillation of the basic clock in the oscillation circuit control unit 8 being stopped. . The power consumption control unit 5 controls the reset signal to stop the operation of the timepiece device 100 as in the first embodiment, and further pull down or pull down connected to the input unit such as an operation switch. Control not to up. Therefore, the control device 200 can reduce power consumption that is consumed by pulling down or pulling up the input unit such as an operation switch, and can suppress power consumption.
In the second embodiment, an example in which the output control unit 72 of the operation input unit 7 includes the NOR circuit 78 is illustrated in FIG. 3, but an OR circuit may be provided instead of the NOR circuit 78. For example, when the output control unit 72 includes an OR circuit, a signal input from the operation unit 6 via the pull-down or pull-up unit 70 is input to one input terminal of the OR circuit, and the power consumption control unit 5 The reset signal may be input to the other input terminal. In the case of the low power consumption state, the power consumption control unit 5 controls the reset signal to the high level so that the output signal of the OR circuit, that is, the signal output from the operation input unit 7 to the control unit 10 is set to the high level. It is possible to prevent the signal level from becoming indefinite. In this case, by inputting the output signal of the OR circuit to the gate terminal of the NMOSFET 76 via the inversion buffer, the power consumption control unit 5 can similarly control the ON / OFF of the NMOSFET 76. Further, the output control unit 72 of the operation input unit 7 is not limited to this, and may include an AND circuit, a NAND circuit, or a circuit that combines various logic circuits. In the case of the low power consumption state, the power consumption control unit 5 controls the operation input unit 7 by inputting a low level or high level control signal corresponding to various logic circuits included in the output control unit 72. The signal output to the unit 10 may be set to a low level or a high level to prevent the signal level from becoming indefinite.
In the second embodiment, the pull-down or pull-up unit 70 of the operation input unit 7 may be configured to be pulled down or pulled up by the on-resistance of the MOSFET as in the first embodiment. In addition, although an example in which two types of pull-down resistors are connected in parallel to an input signal from the operation unit 6 has been described with reference to FIG. 7, the present invention is not limited to this form. For example, one type of pull-down or pull-up may be used as in the first embodiment, or a plurality of pull-downs or pull-ups more than two types may be used.
The timepiece device 100 according to the second embodiment has been described by taking a digital display type timepiece as an example, but may be an analog display type timepiece. Further, the timepiece device 100 according to the present embodiment has been described. However, instead of the timepiece device 100, an electronic device that performs a predetermined operation (predetermined operation) when a power supply voltage is supplied from the power generation unit 1 and the secondary battery 2. It may be a device.
Next, a timepiece device 100c including the control device 200c according to the third embodiment of the present invention will be described. FIG. 10 is a schematic block diagram showing a configuration of a timepiece device 100c according to the third embodiment of the present invention. When comparing the timepiece device 100 (FIG. 1) of the first embodiment with the timepiece device 100 c (FIG. 10) of the third embodiment, the power consumption control unit 5 (FIG. 1) is the power consumption control unit 5 c (FIG. 10). The operation input unit 7 is changed to the operation input unit 7c.
In FIG. 10, the same reference numerals are given to the portions corresponding to those in FIG. 1, and the description thereof will be omitted as appropriate.
First, an outline of the third embodiment will be described. In the third embodiment, the power consumption control unit 5c of the timepiece device 100c inserts a pull-down resistor between the terminal I1 and the power source VSS when detecting the charged state of the secondary battery 2 in the low power consumption mode. The state of the operation unit 6 is determined. The power consumption control unit 5c is in a low power consumption mode when the state of the switch 61 of the operation unit 6 is a conductive state (for example, an OFF (push-in) state if the operation unit 6 is a crown switch and an ON (input) state if the operation unit 6 is a side switch). From the low power consumption mode to the normal mode is not possible.
As a result, the power consumption control unit 5c can be prevented from unnecessarily returning from the low power consumption mode to the normal mode, and the power consumption of the secondary battery 2 due to the restoration can be suppressed.
Next, the operation input unit 7c will be described. The circuit configuration of the operation input unit 7c is the same as the circuit configuration of the operation input unit 7 of the first embodiment shown in FIG. However, the difference is that the terminal OT1 of the operation input unit 7c is connected to the power consumption control unit 5c and the timepiece control unit 9.
The operation input unit 7c has the same function as the operation input unit 7 in the first embodiment, but differs in the following points. The operation input unit 7c generates a switch state signal SIG107 based on the signal from the operation switch input from the operation unit 6 and the pull-down instruction signal SIG106 input from the power consumption control unit 5c. Then, the operation input unit 7c outputs the generated switch state signal SIG107 to the power consumption control unit 5c and the timepiece control unit 9.
Specifically, for example, when the switch 61 of the operation unit 6 is in the cut-off state (open state), the operation input unit 7c sets the switch state signal SIG107 to the low level state (instead of the input pull-down instruction signal SIG106). Hereinafter referred to as the L state). Thus, when the switch 61 is in the open state, the operation input unit 7c sets the switch state signal SIG107 to the L state so as not to return from the low power consumption mode to the normal mode.
On the other hand, when the switch 61 of the operation unit 6 is in the conductive state, the input pull-down instruction signal SIG106 is in a high level state (hereinafter referred to as H state), and the operation input unit 7c sets the switch state signal SIG107 in the H state. Here, the pull-down instruction signal SIG106 in the H state is a signal for switching to the normal mode. Accordingly, the operation input unit 7c causes the power consumption control unit 5c to enter the low power consumption mode by setting the switch state signal SIG107 to the H state when the pull-down instruction signal SIG106 is in the H state and the switch 61 is in the conductive state. It is possible to return from normal mode to normal mode.
On the other hand, when the switch 61 of the operation unit 6 is in the conductive state, the input pull-down instruction signal SIG106 is in the L state, and the operation input unit 7c sets the switch state signal SIG107 in the L state. Here, the pull-down instruction signal SIG106 in the L state is a signal for switching to the low power consumption mode. Thereby, even when the switch 61 of the operation unit 6 is in the conductive state, the operation input unit 7c does not return from the low power consumption mode to the normal mode when the pull-down instruction signal SIG106 is in the L state.
As described above, the operation input unit 7c switches the power consumption control unit 5c from the low power consumption mode to the normal mode by setting the switch state signal SIG107 to the H state only when the SIG 106 is in the H state and the switch 61 is in the conductive state. It is possible to return to
Thereby, the operation input unit 7c can prevent the power consumption control unit 5c from returning from the unnecessary low power consumption mode to the normal mode, and can suppress the power consumption of the secondary battery due to the return to the normal mode.
Next, an outline of processing of the power consumption control unit 5c will be described. The power consumption control unit 5c includes a switch state signal SIG107 input from the operation input unit 7c, a charge state detection signal SIG100 input from the charge detection unit 3, and a voltage detection signal SIG101 input from the battery voltage detection unit 4. Based on the above, a mode instruction signal SIG103 is generated to indicate the normal mode or the low power consumption mode. Then, the power consumption control unit 5 c outputs the generated mode instruction signal SIG 103 to the timepiece control unit 9.
In addition, when the power consumption control unit 5c receives the H state charge detection signal SIG100 indicating the charge state of the secondary battery 2 from the charge detection unit 3 in the low power consumption mode, the power consumption control unit 5c sends the H state pull-down signal to the operation input unit. Output to 7c. Thus, the operation input unit 7c can determine the state of the operation unit 6 by inserting the pull-down resistor of the NMOSFET between the terminal I1 and the power supply VSS (turning on the pull-down resistor).
Further, the power consumption control unit 5c receives an L-state voltage detection signal SIG101 indicating that the voltage of the secondary battery 2 is equal to or lower than a predetermined threshold value from the battery voltage detection unit 4 in the normal mode, and is charged. When an L state charge detection signal SIG100 indicating the non-charge state of the secondary battery 2 is received from the detection unit 3, an L state pull-down signal is output to the operation input unit 7c. Thereby, the operation input unit 7c removes the pull-down resistor of the NMOSFET from between the terminal I1 and the power supply VSS (turns the pull-down resistor OFF).
Hereinafter, an example of the configuration of the power consumption control unit 5c will be described with reference to FIG. FIG. 11 is a schematic block diagram illustrating an example of the configuration of the power consumption control unit 5c according to the third embodiment. The power consumption control unit 5 c includes an inverter 111, an inverter 112, an inverter 113, an AND circuit 114, a NAND circuit 115, an AND circuit 116, an OR circuit 117, and a storage unit 120.
The inverter 111 has an input terminal connected to one input terminal of the charge detection unit 3 and the NAND circuit 115, and an output terminal connected to the output terminal of the inverter 112 and the output terminal of the inverter 113 among the three input terminals of the AND circuit 114. Not connected to each input terminal.
In the inverter 112, the input terminal is not connected to one input terminal of the storage unit 120 and the AND circuit 116, and the output terminal of the three input terminals of the AND circuit 114 is not connected to the output terminal of the inverter 111 and the output terminal of the inverter 113. Each is connected to an input terminal.
The inverter 113 has an input terminal connected to the battery voltage detection unit 4 and an output terminal connected to the input terminal to which the output terminal of the inverter 111 and the output terminal of the inverter 112 are not connected among the three input terminals of the AND circuit 114. Yes.
The AND circuit 114 has three input terminals, each input terminal being connected to each of the output terminals of the inverters 111 to 113, and the output terminal being connected to one input terminal of the OR circuit 117.
In the NAND circuit 115, one input terminal is connected to the operation input unit 7c, the other input terminal is connected to a line connecting the charge detection unit 3 and the input terminal of the inverter 111, and an output terminal is one of the AND circuit 116. Connected to the input terminal.
The AND circuit 116 has one input terminal connected to the output terminal of the NAND circuit 115, the other input terminal connected to a line connecting the storage unit 120 and the input terminal of the inverter 112, and an output terminal of the OR circuit 117. Connected to one input terminal.
The OR circuit 117 has one input terminal connected to the output terminal of the AND circuit 116, the other input terminal connected to the output terminal of the AND circuit 114, and an output terminal connected to the timepiece control unit 9 and the storage unit 120. ing.
The storage unit 120 is connected to the output terminal of the OR circuit 117, the input terminal of the inverter 112, and one input terminal of the AND circuit 116.
Here, the charging state detection signal SIG100 indicates a charging state in which charging is performed from the solar cell 1 to the secondary battery 2 in the H state, and charging is not performed from the solar cell 1 to the secondary battery 2 in the L state. Indicates the state of charge. Further, the voltage detection signal SIG101 indicates a case where the secondary battery 2 is higher than the predetermined comparison voltage in the H state, and indicates that the secondary battery 2 is equal to or lower than the predetermined comparison voltage in the L state. The mode instruction signal SIG103 indicates that the low power consumption mode is instructed in the H state, and indicates that the normal mode is instructed in the L state.
Next, an outline of processing of the power consumption control unit 5c in FIG. 11 will be described. The power consumption controller 5c constitutes a selection circuit that selects the output signal SIG_A1 of the AND circuit 116 and the output signal SIG_A2 of the AND circuit 114. That is, based on the current mode signal MD indicating the current mode read from the storage unit 120, the power consumption control unit 5c converts one output signal from the two output signals of the output signal SIG_A1 and the output signal SIG_A2 to the mode instruction signal SIG103. The selected mode instruction signal SIG103 is output to the timepiece control unit 9.
The storage unit 120 stores a current mode signal MD indicating the current mode in advance, and the storage unit 120 ANDs the stored current mode signal MD with the inverter 112 in synchronization with a clock signal (not shown). Output to the circuit 116.
Next, details of the processing of the power consumption control unit 5c in FIG. 11 will be described separately for the case of being in the low power consumption mode and the case of being in the normal mode.
First, in the low power consumption mode, the inverter 112 receives the current mode signal MD in the H state from the storage unit 120. Here, the current mode signal MD in the H state indicates the low power consumption mode. The inverter 112 inverts the received current mode signal MD in the input H state to generate an L state signal, and outputs the generated L state signal to the AND circuit 114.
Since the AND circuit 114 receives the L state signal from the inverter 112, the AND circuit 114 generates the L state output signal SIG_A2 regardless of other input signals, and outputs the generated L state output signal SIG_A2 to the OR circuit 117. To do.
The OR circuit 117 receives the output signal SIG_A2 in the L state from the AND circuit 114. Therefore, the state of the output signal SIG_A1, which is the other input, is set to the state of the mode instruction signal SIG103, and the mode instruction signal SIG103 is controlled by the clock. To the unit 9. Therefore, the power consumption control unit 5c selects the output signal SIG_A1 as the mode instruction signal SIG103 output to the timepiece control unit 9 when the current mode signal MD is in the H state. Here, the current mode signal MD in the H state indicates that the current mode is the low power consumption mode.
The NAND circuit 115 generates an output signal based on the switch state signal SIG107 input from the operation input unit 7c and the charge state detection signal SIG100 input from the charge detection unit 3.
Specifically, when the switch state signal SIG107 is in the H state, the NAND circuit 115 generates an L state output signal and outputs the generated L state output signal to the AND circuit 116. Here, the switch state signal SIG107 in the H state indicates that the switch 61 is conductive and the pull-down instruction signal is in the H state.
In that case, since the output signal input from the NAND circuit 115 is in the L state, the AND circuit 116 generates the output signal SIG_A1 in the L state and outputs the generated output signal SIG_A1 in the L state to the OR circuit 117.
As a result, both the output signal SIG_A1 and the output signal SIG_A2 input to the OR circuit 117 are in the L state, the OR circuit 117 generates the L state mode instruction signal SIG103, and the L state mode instruction signal SIG103 is sent to the timepiece control unit 9. Output. Thereby, the power consumption control unit 5c can instruct the timepiece control unit 9 to shift to the normal mode.
Further, the current mode signal MD stored in the storage unit 120 is updated with the mode instruction signal SIG103 in the L state, so that the current mode signal MD is set to the L state representing the normal mode.
On the other hand, in the NAND circuit 115, when the switch state signal SIG107 is in the L state (when the switch 61 is in the open state or the pull-down instruction signal SIG106 in the L state), or when the charge state detection signal SIG100 is in the L state (in the non-charge state). ), An H-state output signal is generated, and the generated H-state output signal is output to the AND circuit 116.
In that case, since the output signal input from the NAND circuit 115 is in the H state and the current mode signal MD input from the storage unit 120 is in the H state because the output signal input from the NAND circuit 115 is in the low power consumption mode, the AND circuit 116 The state output signal SIG_A1 is generated, and the generated H state output signal SIG_A1 is output to the OR circuit 117.
As a result, since the output signal SIG_A1 input to the OR circuit 117 is in the H state, the OR circuit 117 generates an H state mode instruction signal SIG103 and outputs the H state mode instruction signal SIG103 to the timepiece control unit 9. . Thereby, the power consumption control unit 5c can instruct the timepiece control unit 9 to make a transition to the low power consumption mode. However, since the current state is under the low power consumption mode, no mode transition occurs, and the timepiece control unit 9 Maintains a low power consumption mode.
Next, processing of the power consumption control unit 5c when currently in the normal mode will be described. The AND circuit 116 reads the current mode signal MD from the storage unit 120. Since the current mode signal MD is in the L state because it is currently in the normal mode, the AND circuit 116 generates and generates the L state output signal SIG_A1 regardless of the signal input to the other input terminal. The output signal SIG_A1 in the L state is output to the OR circuit 117.
The OR circuit 117 receives the output signal SIG_A1 in the L state from the AND circuit 116. Therefore, the state of the output signal SIG_A2, which is the other input, is set to the state of the mode instruction signal SIG103, and the mode instruction signal SIG103 is clock-controlled. To the unit 9. Therefore, when the current mode signal MD is in the L state, the power consumption control unit 5c selects the output signal SIG_A2 as the mode instruction signal SIG103 output to the timepiece control unit 9. Here, the current mode signal MD in the L state indicates that the current mode is the normal mode.
Since it is currently in the normal mode, the inverter 112 receives the current mode signal MD in the L state from the storage unit 120. Here, the current mode signal MD in the L state indicates the normal mode. The inverter 112 inverts the input current mode signal MD in the L state to generate an H state signal, and outputs the generated H state signal to the AND circuit 114.
In the AND circuit 114, since the signal input from the inverter 112 is in the H state, the output of the AND circuit 114 depends on the output signal of the inverter 111 and the output signal of the inverter 113 which are other inputs.
Here, the inverter 111 inverts the charge state detection signal SIG100 input from the charge detection unit 3, and outputs an inverted signal of the charge state detection signal SIG100 obtained by the inversion to the AND circuit 114. The inverter 112 inverts the voltage detection signal SIG101 input from the battery voltage detection unit 4 and outputs an inverted signal of the voltage detection signal SIG101 obtained by the inversion to the AND circuit 114.
Therefore, the AND circuit 114 generates the output signal SIG_A2 in the H state only when the charge state detection signal SIG100 is in the L state and the voltage detection signal SIG101 is in the L state. That is, the AND circuit 114 generates the output signal SIG_A2 in the H state only in the non-charge state and when the voltage of the secondary battery 2 is equal to or less than a predetermined threshold value.
Then, the AND circuit 114 outputs the generated output signal SIG_A2 in the H state to the OR circuit 117.
As a result, since the output signal SIG_A2 input from the AND circuit 114 is in the H state, the OR circuit 117 generates the H state mode instruction signal SIG103 that indicates the low power consumption mode, and the generated H state mode instruction signal SIG103. Is output to the clock control unit 9.
Thus, under the normal mode, the power consumption control unit 5c changes the transition from the normal mode to the low power consumption mode when the voltage of the secondary battery 2 is equal to or lower than a predetermined threshold value in the non-charged state. Can be directed to.
Further, the OR circuit 117 updates the current mode signal stored in the storage unit 120 with the generated H-state mode instruction signal SIG103. Thereby, the OR circuit 117 can set the current mode signal to the H state indicating the low power consumption mode.
On the other hand, the AND circuit 114 operates when the charge state detection signal SIG100 is in the H state (in the charge state) or when the voltage detection signal SIG101 is in the H state (when the voltage of the secondary battery 2 exceeds a predetermined threshold value). ), An output signal SIG_A2 in the L state is generated. Then, the AND circuit 114 outputs the generated L-state output signal SIG_A2 to the OR circuit 117.
As a result, since the output signal SIG_A2 input from the AND circuit 114 is in the L state, the OR circuit 117 generates the L state mode instruction signal SIG103 that indicates the normal mode, and the generated L state mode instruction signal SIG103 is clocked. Output to the control unit 9.
As a result, the power consumption control unit 5c can instruct the timepiece control unit 9 to transition to the normal mode, but since it is currently in the normal mode, no mode transition occurs, and the timepiece control unit 9 switches to the normal mode. maintain.
FIG. 12 is a table summarizing the relationship among the current mode signal MD, the input signal, and the output signal, which are internal signals of the power consumption control unit 5c. In the figure, a current mode signal MD, a charge state detection signal SIG100, a voltage detection signal SIG101, a switch state signal SIG107, and a mode instruction signal 103 are shown in association with each other.
In the figure, when the current mode signal MD is in the H state, the charge state detection signal SIG100 is in the H state, the switch state signal SIG107 is in the H state only, and the mode instruction signal SIG103 is in the L state, regardless of the voltage detection signal SIG101. It is shown to be in a state.
That is, when the current mode is the low power consumption mode, the power consumption control unit 5c causes the timepiece control unit 9 to enter the normal mode only when the charging state, the switch 61 is in the conductive state, and the pull-down instruction signal is in the H state. It is indicated to indicate a transition.
Further, when the current mode signal MD is in the H state, and the combination of the charge state detection signal SIG100, the voltage detection signal SIG101, and the switch state signal SIG107 is other than the above, the mode instruction signal SIG103 is in the H state. It is shown that there is.
That is, when the current mode is the low power consumption mode, and when the switch 61 is in the charged state, the switch 61 is in the conductive state, and the pull-down instruction signal is in the H state, the power consumption control unit 5c Instructing the transition to the low power consumption mode is shown in FIG. In this case, since it is already in the low power consumption mode, the timepiece control unit 9 maintains the low power consumption mode.
In the same figure, when the current mode signal MD is in the L state, the charge state detection signal SIG100 is in the L state and the voltage detection signal SIG101 is only in the L state, regardless of the switch state signal SIG107, and the mode instruction signal SIG103. Is shown in the H state.
That is, when the current mode is the normal power mode, the power consumption control is performed only in the non-charged state and when the voltage of the secondary battery 2 is equal to or lower than a predetermined threshold (when the voltage of the secondary battery 2 is reduced). The unit 5c is shown to instruct the timepiece control unit 9 to transition to the low power consumption mode.
When the current mode signal MD is in the L state and the combination of the charge state detection signal SIG100, the voltage detection signal SIG101, and the switch state signal SIG107 is other than the above, the mode instruction signal SIG103 is in the L state. It is shown that there is.
That is, in the case where the current mode is the normal mode other than the non-charged state and the voltage of the secondary battery 2 is equal to or lower than a predetermined threshold value (in the case of the voltage drop of the secondary battery 2). It is shown that the power consumption control unit 5c instructs the timepiece control unit 9 to transition to the normal mode. In that case, since it is already in the normal mode, the timepiece control unit 9 maintains the normal mode.
FIG. 13 is a flowchart showing a process flow of the timepiece device 100c according to the third embodiment. First, the power consumption control unit 5c determines whether or not the current mode is the low power consumption mode (step S201). When the current mode is the normal mode (NO in step S201), the power consumption control unit 5c determines whether or not the voltage of the secondary battery 2 is equal to or lower than a predetermined threshold (step S202).
When the voltage of the secondary battery 2 is not less than or equal to the predetermined threshold value (NO in step S202), the power consumption control unit 5c returns to the process of step S201. On the other hand, when the voltage of the secondary battery 2 is equal to or lower than a predetermined threshold (YES in step S202), the power consumption control unit 5c determines whether or not the secondary battery 2 is in a charged state (step S203). When the secondary battery 2 is in a charged state (step S203 YES), the power consumption control unit 5c returns to the process of step S201.
On the other hand, when the secondary battery 2 is not in the charged state (NO in step S203), the power consumption control unit 5c instructs the timepiece control unit 9 to enter the low power consumption mode (step S204). Then, the power consumption control unit 5c outputs a pull-down signal in the L state to the operation input unit 7c, and turns off the pull-down resistor (step S205). Then, the power consumption control unit 5c causes the oscillation circuit control unit 8 to stop the oscillation circuit (step S206).
Returning to step S201, when the current mode is the low power consumption mode (YES in step S201), the power consumption control unit 5c determines whether or not the secondary battery 2 is in a charged state (step S207). When the secondary battery 2 is not in the charged state (NO in step S207), the power consumption control unit 5c returns to the process of step S201.
On the other hand, when the secondary battery 2 is in the charged state (step S207 YES), the power consumption control unit 5c outputs the H-state pull-down signal to the operation input unit 7c and turns on the pull-down resistor. (Step S208). Next, the power consumption control unit 5c determines whether or not the switch 61 is in a conductive state (step S209).
When the switch 61 is not in the conductive state (NO in step S209), the power consumption control unit 5c proceeds to the process of step S204. On the other hand, when the switch 61 is in a conductive state (YES in step S209), the power consumption control unit 5c instructs the timepiece control unit 9 to enter the normal mode (step S210). Then, the power consumption control unit 5c instructs the oscillation circuit control unit 8 to drive the oscillation circuit (step S211). Above, the process of this flowchart is complete | finished.
As described above, when the power consumption control unit 5c of the timepiece device 100c detects the state of charge of the secondary battery 2 in the low power consumption mode, the pull-down resistor is inserted between the terminal I1 and the power source VSS, Determine the state. The power consumption control unit 5c is in a low power consumption mode when the state of the switch 61 of the operation unit 6 is a conductive state (for example, an OFF (push-in) state if the operation unit 6 is a crown switch, an ON (input) state if the operation unit 6 is a side switch) From the low power consumption mode to the normal mode is not possible.
Thereby, the power consumption control unit 5c can return from the low power consumption mode to the normal mode only when the switch 61 of the operation unit 6 is in the conductive state. Return to mode can be eliminated. As a result, the power consumption control unit 5c can suppress the power consumption of the secondary battery 2.
In addition, the timepiece device 100c according to the present embodiment stops the operation of the timepiece device 100c in the low power consumption state, and is further connected to the operation input unit 7c in the low power consumption state. Since control is performed not to pull down or pull up 70, the power consumption that is consumed by pulling down or pulling up the operation input unit 7c can be reduced, and the power consumption can be suppressed.
In the present embodiment, as in the first embodiment, the output control unit 72 of the operation input unit 7c includes the AND circuit 74. However, instead of the AND circuit 74, a NAND circuit may be included. For example, when the output control unit 72 includes a NAND circuit, a signal input from the operation unit 6 via the pull-down or pull-up unit 70 is input to one input terminal of the NAND circuit, and the power consumption control unit 5c An input pull-down signal may be input to the other input terminal. In the case of the low power consumption state, the power consumption control unit 5 controls the control signal to the low level, so that the output signal of the NAND circuit that is the signal output from the operation input unit 7c to the control unit 10 is set to the high level. It is possible to prevent the signal level from becoming indefinite.
Moreover, the output control part 72 of the operation input part 7c is not restricted to this, You may provide the circuit which combined OR circuit, NOR circuit, or various logic circuits. In the case of the low power consumption state, the power consumption control unit 5c controls the operation input unit 7 by inputting a low level or high level control signal corresponding to various logic circuits included in the output control unit 72. The signal output to the unit 10 may be set to a low level or a high level to prevent the signal level from becoming indefinite.
In the present embodiment, as in the first embodiment, an example in which the pull-down or pull-up unit 70 of the operation input unit 7c includes a pull-down or pull-up MOSFET is shown, but the present invention is not limited to this. For example, the pull-down or pull-up unit 70 of the operation input unit 7c may include a resistor that pulls down or pulls up, and a transistor circuit that is connected in series to the resistor and switches between connection and disconnection of the connection. . Thereby, the power consumption control unit 5 may control whether to pull down or pull up in accordance with controlling on (conduction) and off (cutoff) of the transistor circuit.
The timepiece device 100c in the present embodiment has been described by taking an analog display type timepiece as an example, but may be a digital display type timepiece. Moreover, although the timepiece device 100c according to the first embodiment has been described, the power supply voltage is supplied from the power generation unit 1 and the secondary battery 2 in place of the timepiece device 100, and a predetermined operation (predetermined operation) is executed. It may be an electronic device.
As described above, as described in the first embodiment, the second embodiment, and the third embodiment, the power consumption control unit (5 or 5c) of the control device (200 or 200c) is supplied from the secondary battery 2. The control unit 10 is controlled not to execute a predetermined operation (predetermined operation), and the operation input unit 7 is controlled not to be pulled down or pulled up according to the state of power to be generated. Therefore, the control device 200 can suppress power consumption in the timepiece device 100 according to the state of power supplied from the secondary battery 2.
When the secondary battery 2 is in a non-charged state where the secondary battery 2 is not being charged by the solar battery 1 as the state of power supplied from the secondary battery 2, the power consumption control unit (5 or 5c) Control (predetermined operation) is not executed, and the operation input unit (7 or 7c) is shifted to a low power consumption state in which control is not performed to pull down or pull up. Thereby, for example, when the timepiece device (100 or 100c) is in the dark where the solar cell 1 is not irradiated with light and cannot generate the electromotive force, the secondary battery 2 cannot be charged. The unit 5 stops the operation of the timepiece device (100 or 100c) and controls the operation input unit (7 or 7c) not to pull down or pull up. Therefore, the control device 200 can suppress power consumption in the timepiece device (100 or 100c) when the secondary battery 2 is in a non-charged state.
On the other hand, when the secondary battery 2 is not in a non-charged state, the power consumption control unit (5 or 5c) controls the control unit 10 to execute a predetermined operation (predetermined operation), and the operation input unit 7 Transition to a normal operation state in which control is performed to pull down or pull up. Thereby, when the solar cell 1 is generating the electromotive force and charging the secondary battery 2, the power consumption control unit (5 or 5c) performs a predetermined operation on the timepiece device (100 or 100c). (Predetermined operation) is performed, and the operation input unit 7 is controlled to be pulled down or pulled up. Therefore, the control device 200 can normally operate the timepiece device (100 or 100c) when the secondary battery 2 is not in a non-charged state.
When the secondary battery 2 is in a non-charged state and the output voltage (potential difference) of the secondary battery 2 is equal to or lower than a predetermined threshold, the power consumption control unit (5 or 5c) 100 or 100c) is shifted to the low power consumption state. Thereby, when the solar cell 1 cannot generate an electromotive force and the output voltage of the secondary battery 2 is reduced, the power consumption control unit (5 or 5c) To a low power consumption state. Therefore, the control device 200 can suppress power consumption in the timepiece device (100 or 100c) when the secondary battery 2 is in a non-charged state and the output voltage is reduced.
Further, when the secondary battery 2 is in a non-charged state and the non-charged state continues for a predetermined time or longer, the power consumption control unit (5 or 5c) consumes less timepiece device (100 or 100c). Transition to the power state. Thereby, when the state where the solar cell 1 cannot generate an electromotive force continues, for example, in the timepiece device (100 or 100c), the dark state where the solar cell 1 is not irradiated with light continues for a predetermined time or more. In such a case, the power consumption control unit (5 or 5c) shifts the timepiece device (100 or 100c) to the low power consumption state. Therefore, the control device 200 can suppress power consumption in the timepiece device (100 or 100c) when the secondary battery 2 is in a non-charged state and the non-charged state continues for a predetermined time or more. .
Further, when a signal corresponding to a predetermined operation is input from the operation unit 6, the secondary battery 2 is in a non-charged state, and the non-charged state continues for a predetermined time or more. The power consumption control unit (5 or 5c) shifts the timepiece device (100 or 100c) to the low power consumption state. Thereby, for example, since the clock device (100 or 100c) is shipped from the factory until it reaches the store or the purchaser's hand, the crown switch is pulled out and placed in the box. In such a case, the power consumption control unit (5 or 5c) shifts the timepiece device (100 or 100c) to the low power consumption state. Therefore, the control device 200 is in a state where a signal corresponding to a predetermined operation is input from the operation unit 6, the secondary battery 2 is in a non-charged state, and a non-charged state is determined in advance. When it continues for more than time, power consumption in the timepiece device (100 or 100c) can be suppressed.
In addition, the control device 200 includes an oscillation circuit control unit 8 that generates and generates a basic clock used for the operation of the control unit 10 when power is supplied. The power consumption control unit (5 or 5c) is an oscillation circuit control unit. When the oscillation of the basic clock 8 that oscillates in response to the supply of power is stopped, the control unit 10 is controlled not to execute a predetermined operation (predetermined operation), and the operation input unit 7 is pulled down or A transition is made to a low power consumption state in which control is performed not to pull up. Thereby, for example, the output voltage (potential difference) supplied from the secondary battery 2 becomes equal to or lower than the lower limit voltage (potential difference) at which the basic clock can be oscillated in the oscillation circuit control unit 8. When the clock oscillation stops, the power consumption control unit (5 or 5c) stops the operation of the timepiece device (100 or 100c) and controls the operation input unit 7 not to pull down or pull up. Therefore, when the oscillation of the basic clock in the oscillation circuit control unit 8 is stopped, the control device 200 can suppress power consumption in the timepiece device (100 or 100c).
In the low power consumption state, the output voltage (potential difference) supplied from the secondary battery 2 is a voltage (potential difference) determined in advance from a lower limit voltage (potential difference) that can oscillate the basic clock in the oscillation circuit control unit 8. ) It is determined whether or not the voltage (potential difference) is greater than or equal to the voltage (potential difference), and the output voltage (potential difference) is a voltage (potential difference) predetermined from the lower limit voltage (potential difference) that can oscillate the basic clock in the oscillation controller 8 If the voltage (potential difference) is greater than the specified value, the control unit 10 is controlled to execute a predetermined operation (predetermined operation), and the operation input unit 7 is controlled to be pulled down or pulled up. Therefore, when the output voltage (potential difference) supplied from the secondary battery 2 is larger by a predetermined voltage (potential difference) than the lower limit voltage (potential difference) at which the oscillation control unit 8 can oscillate the basic clock, The device (100 or 100c) can be operated normally.
As described with reference to FIGS. 3 and 7, the circuit that controls the operation input unit 7 to pull down or pull up does not require a special circuit in the present embodiment, and thus a special circuit is used. Compared with the case, increase in cost and part area can be suppressed.
In addition, in each embodiment, although the example which uses the solar cell 1 for a primary power supply part was demonstrated, it replaced with the solar cell 1 and you may use the primary power supply part which has another electric power generation function. Moreover, although the example using the secondary battery 2 for the secondary power supply unit has been described, a capacitor may be used instead of the secondary battery 2.
In addition, although the timepiece device (100 or 100c) in each embodiment has been described with respect to the timepiece device (100 or 100c) including the power generation unit 1 and the secondary battery 2, the power generation unit 1 and the secondary battery 2 are It may be provided outside the device itself, and the device may be supplied with power from the power generation unit 1 and the secondary battery 2 provided outside the device.
In addition, in each embodiment, it replaces with the electric power supplied from the electric power generation part 1 and the secondary battery 2, and the control apparatus 200 which is changed to a low electric power state according to the electric power supplied from a primary battery, and a timepiece apparatus (100 or 100c), or may be applied to an electronic device.
In each embodiment, the timepiece device (100 or 100c) has been described as an example. However, the present invention is not limited to the timepiece device (100 or 100c), and may be an electronic device that executes a predetermined operation (predetermined operation). Good. For example, instead of the clock device (100 or 100c), an electronic device such as an electronic calculator, an electronic dictionary, a mobile phone, a portable game machine, or a portable computer may be used, or the electronic device may be operated remotely. An electronic remote control device may be used.
The charge detection unit 3, battery voltage detection unit 4, power consumption control unit (5 or 5c), operation input unit (7 or 7c), oscillation circuit control unit in the control device (200 or 200c) of FIG. 1 or FIG. 8 and the clock control unit 9, or the power consumption control unit 5, the operation input unit 7, the oscillation circuit control unit 8, and the clock control unit 9 in the control device 200 of FIG. 6 are realized by dedicated hardware. Further, it is configured by a memory and a CPU (central processing unit), and a program for realizing the functions of each unit of the control device 200 in FIG. 1 or FIG. 6 is loaded into the memory and executed. A function may be realized.
Also, a program for realizing the function of each unit in the control device (200 or 200c) of FIG. 1, FIG. 6, or FIG. 10 described above is recorded on a computer-readable recording medium, and the program recorded on this recording medium May be executed by causing the computer system to read and execute the above. Here, the “computer system” includes an OS and hardware such as peripheral devices.
DESCRIPTION OF SYMBOLS 1 Solar cell 2 Secondary battery 3 Charge detection part 4 Battery voltage detection part 5, 5c Power consumption control part 6 Operation part 7, 7c Operation input part 8 Oscillation circuit control part 9 Clock control part 10 Control part 17 Step-down circuit 51 Oscillation stop 51 Detection circuit 52 Reset circuit 81 Oscillation constant voltage circuit 82 Crystal oscillation circuit 83 Dividing circuit 61 Switch 70 Pull-down or pull-up unit 71, 75, 76 NMOSFET
72 Output Control Unit 73 Buffer 74 AND Circuit 77 Inversion Buffer 78 NOR Circuit 100, 100c Clock Device 200, 200c Control Device
An input unit for pulling down or pulling up a signal input from the operator;
A control unit that performs a predetermined operation according to the signal input via the input unit;
A power consumption control unit that controls the control unit not to execute the predetermined operation according to a state of supplied power, and controls the input unit not to pull down or pull up,
A charge detection unit that detects whether or not the secondary power supply unit charged by the electromotive force generated by the primary power supply unit is in a non-charged state that is not being charged by the primary power supply unit;
2. The control device according to claim 1, wherein the control unit controls the control unit not to execute the predetermined operation, and makes a transition to a low power consumption state in which the input unit is controlled not to pull down or pull up. 3. .
When in the low power consumption state, when the secondary power supply unit is detected to be not in the non-charge state by the charge detection unit, the control unit performs control to execute the predetermined operation, and The control device according to claim 2, wherein a transition is made to a normal operation state in which the input unit is controlled to be pulled down or pulled up.
When the power consumption control unit determines that it is not in the non-charged state, the transition to the normal operation state by the power consumption control unit is performed based on an output signal output from the input unit. Item 4. The control device according to Item 3.
A voltage detection unit for detecting the voltage of the secondary power supply unit;
When not in the low power consumption state, the transition to the low power consumption state by the power consumption control unit is detected by the charge detection unit when the secondary power source unit is not in the non-charge state, and the detected second The control device according to any one of claims 2 to 4, wherein the control device is performed only when the voltage of the next power supply unit is equal to or lower than a predetermined threshold value.
The state of the electric power is the non-charged state, and when the non-charged state continues for a predetermined time or more, transition to the low power consumption state is performed. The control device according to any one of the above.
A signal corresponding to a predetermined operation is input from the operation element, the power state is the non-charge state, and the non-charge state lasts for a predetermined time or more. The control device according to any one of claims 2 to 6, wherein the control device is caused to make a transition to the low power consumption state.
An oscillation circuit control unit that oscillates and generates a basic clock used for the operation of the control unit supplied with the power;
When the oscillation circuit control unit stops oscillating the basic clock that oscillates in response to the supply of power, the control unit is controlled not to execute the predetermined operation, and the input unit is pulled down or pulled down. The control device according to claim 1, wherein the control device transitions to a low power consumption state in which control is performed so as not to increase.
When in the low power consumption state, it is determined whether the potential difference of the power is greater than or equal to a potential difference larger than a lower limit potential difference that can oscillate the basic clock in the oscillation circuit control unit,
When the potential difference of the power is greater than or equal to a potential difference greater than a predetermined potential difference from the lower limit voltage in the oscillation control unit, the control unit controls the control unit to execute the predetermined operation, and the input unit The control device according to claim 8, wherein the control device shifts to a normal operation state in which pull-down or pull-up control is performed.
A pull-down or pull-up unit that pulls down or pulls up the signal input from the operator;
An output control unit that outputs a signal level of the signal output to the control unit at a high level or a low level in the low power consumption state;
The control device according to any one of claims 2 to 9, further comprising:
The output control unit of the input unit includes an AND circuit or a NAND circuit,
The signal input from the operator via the pull-down or pull-up unit is input to one input terminal of the AND circuit or the NAND circuit,
The output of the AND circuit or the NAND circuit corresponds to the output of the input unit,
11. The control device according to claim 10, wherein, in the low power consumption state, the other input terminal of the AND circuit or the NAND circuit is controlled to a Low level.
The output control unit of the input unit includes a NOR circuit or an OR circuit,
The signal input from the operator via the pull-down or pull-up unit is input to one input terminal of the NOR circuit or OR circuit,
The output of the NOR circuit or the OR circuit corresponds to the output of the input unit,
The control device according to claim 10 or 11, wherein, in the low power consumption state, the other input terminal of the NOR circuit or the OR circuit is controlled to a high level.
The pull-down or pull-up unit of the input unit is the pull-down or pull-up unit that pulls down or pulls up using a MOSFET,
The control device according to any one of claims 10 to 12, wherein the MOSFET is turned off in the low power consumption state.
The pull-down or pull-up unit of the input unit is the pull-down or pull-up unit that pulls down or pulls up using a MOSFET and a resistance element connected in series to the MOSFET,
The control device according to claim 10, wherein the MOSFET is turned off in the low power consumption state.
15. The operation element according to claim 1, wherein the operation element switches between a conduction state in which one terminal and the other terminal of the operation element are connected and a cut-off state in which the operation element is not connected in accordance with an operation. The control device according to any one of the above.
An electronic apparatus comprising the control device according to claim 1.
A timepiece device comprising the control device according to claim 1.
A control method in a control device comprising:
The power consumption control unit controls the control unit not to execute the predetermined operation according to the state of the supplied power, and performs the control to prevent the input unit from pulling down or pulling up.
JP2011147387A 2010-09-03 2011-07-01 Control device, electronic device, timepiece device, and control method Withdrawn JP2012145558A (en)
JP2010198084 2010-09-03
JP2010286681 2010-12-22
JP2011147387A JP2012145558A (en) 2010-09-03 2011-07-01 Control device, electronic device, timepiece device, and control method
US13/199,498 US20120056480A1 (en) 2010-09-03 2011-08-31 Control device, electronic apparatus, timepiece device, and control method
CN2011102583650A CN102402190A (en) 2010-09-03 2011-09-02 Control device, electronic apparatus, timepiece device, and control method
JP2012145558A true JP2012145558A (en) 2012-08-02
ID=45770177
JP2011147387A Withdrawn JP2012145558A (en) 2010-09-03 2011-07-01 Control device, electronic device, timepiece device, and control method
US (1) US20120056480A1 (en)
JP (1) JP2012145558A (en)
CN (1) CN102402190A (en)
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2011-07-01 JP JP2011147387A patent/JP2012145558A/en not_active Withdrawn
2011-08-31 US US13/199,498 patent/US20120056480A1/en not_active Abandoned
2011-09-02 CN CN2011102583650A patent/CN102402190A/en not_active Application Discontinuation
CN102402190A (en) 2012-04-04
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