JP3673318B2 - Rechargeable watch and power supply method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic timepiece having a step motor driven by a solar cell, a large-capacity storage means as a main power source, and a small-capacity storage means for quick start.
[0002]
[Prior art]
Conventionally, a long-life electronic timepiece that does not require battery replacement by combining a solar cell and an electric double layer type large capacity capacitor has been commercialized.
[0003]
However, the original one had some problems.
For one thing, the large-capacitance capacitor has a large capacity, so once it is completely discharged, such as by leaving the electronic watch in a dark place, the watch circuit starts operating even if it is exposed to the next bright place and exposed to light. This is a problem that it takes a long time to charge to the voltage, and it takes too much time to start the operation of the watch.
[0004]
A method for solving this problem is proposed in Japanese Patent Publication No. 4-80355. In this method, a small capacitor other than the large capacitor is newly provided, and at the time of quick start, the step motor is driven by the small capacitor, so that the clock circuit is not fully charged. Has been realized to start quickly.
[0005]
Another problem is that when the voltage of the large-capacitance capacitor as the power source drops below the voltage level for normal display (1 second hand movement operation), a charging warning display (2 If you continue to use it without noticing the charge warning display (2 second hand drive), the voltage of the large capacitor will drop further, and the hand will stop before long. End up. When the hand movement is stopped, there is no problem because the carrier notices the abnormality of the watch. However, the charge is recharged and the battery is recharged without notice from the hand movement stop state (2 seconds hand movement state) or further charged. When the voltage level is restored to the normal state (1 second hand movement state), the watch is displayed in spite of being delayed by the time that the pulse motor has stopped, so it is displayed unchanged. It is a problem that the watch is used without noticing.
[0006]
A method for solving this problem has been proposed by the present applicant in Japanese Patent Laid-Open No. 62-194484. In this method, when it is detected that the movement of the hand has stopped by the charging warning display (2 second hand movement driving) that prompts charging, a time error warning display (anomaly 2) is given to warn that the clock is delayed by the time when the hand movement is stopped. By switching to the second hand drive) and giving a warning to the wearer, wrong time information is not given. A conventional example will be described below with reference to the drawings.
[0007]
Figure 4 shows the conventional time-sharing charging method.Rechargeable electronic watchIt is a whole block diagram which shows the solar electronic timepiece with a warning display.
1 isPower generation meansSolar cell, 2 for main powerLarge capacity storage meansLarge capacitors, 3 for quick startSmall capacity storage meansSmall capacitors 4, 4 and 5 are backflow prevention diodes to the solar cell 1, 6 is time division means, 7 is power supply switching means, 8 is overcharge prevention means, 9 is a backflow prevention diode to the large capacity capacitor 2, and 100 is a watch. Circuit, which will be described laterIs a motorIt has a function of driving the step motor 110.
[0008]
The time division means 6 receives the control of a time division signal P106, which will be described later, at the gate input, and is turned on when the "H" level time division signal P106 is inputted, and the "L" level time division signal P106 is inputted. And turn off. When the time division means 6 is in the OFF state, the small capacitor 3 is charged, and in the ON state, the large capacitor 2 is charged.
The power supply switching means 7 receives the control of a power supply selection signal P118, which will be described later, at the gate input, and is turned on when the “H” level power supply selection signal P118 is input, and the “L” level power supply selection signal P118 is input. And turn off. When the power supply switching means 7 is in the ON state, the small capacitor 3 and the large capacitor 2 are connected in parallel, and the power source of the timepiece circuit 100 is the large capacitor 2. When the power supply switching means 7 is in the OFF state, the small capacitor 3 and the large capacitor 2 via the backflow prevention diode 9 are connected in parallel.That is, the parallel connection of the large-capacitance capacitor 2 and the small-capacitance capacitor 3 via the power supply switching means 7 is separated.During the quick start when the large-capacity capacitor 2 is hardly charged, the small-capacitance capacitor 3 is a power source, and when the large-capacity capacitor 2 is charged to some extent, the large-capacitance capacitor 2 via the backflow prevention diode 9 is the power source.
The overcharge prevention means 8 receives the control of a discharge signal P125, which will be described later, at the gate input, and is turned on when the “L” level discharge signal P125 is inputted, and is turned off when the “H” level discharge signal P125 is inputted. To do. When the overcharge prevention means 8 is in the ON state, charging to the large capacity capacitor 2 and the small capacity capacitor 3 is prohibited.
[0009]
FIG. 3 shows a block diagram of a conventional timepiece circuit 100. Reference numeral 101 denotes a reference signal source, which outputs a 32768 Hz reference signal P101. Reference numeral 102 denotes a frequency dividing stage that outputs a signal group P102.
103 isUsually means to create pulsesThe 1-second hand movement pulse generating circuit generates a 1-second hand-movement pulse P103 for normal display that moves one shot every second as shown in FIG. 5A.
104 isFirst warning pulse creation meansIn the 2-second hand movement pulse generation circuit, a 2-second hand movement pulse P104 is displayed for charging warning display, in which two hands are moved every 2 seconds shown in FIG. 5B and the interval between the two shots is constant.
105 isSecond warning pulse creation meansIn the irregular 2-second hand movement pulse generation circuit, an irregular 2-second movement pulse P105 for time deviation warning in which two hands are moved every 2 seconds shown in FIG. 5C and the interval between the two shots is large or small is generated.
Reference numeral 106 denotes a time division signal generating circuit which controls the time division means 6 by a time division signal P106 shown in FIG.
[0010]
107 is a first selection means for inputting a voltage detection signal P111 from a voltage detection circuit 111, which will be described later, to the C input. The A input is selected and output from the Z output at the "L" level, and the B input is selected from the Z output at the "H" level. The
108 is a second selection means for inputting a stop storage signal P119 from a stop storage circuit 119, which will be described later, to the C input, and the A input is selected and output from the Z output at the "L" level and the B input at the "H" level. The
A motor driver 109 receives a signal from the second selection means 108 and drives the step motor 110 as a driving signal P109.
[0011]
122 isRotation detection meansThis is a non-rotation detection circuit, and a 2-second hand movement mode detection signal P121 from a 2-second hand movement mode detection circuit 126, which will be described later, is input to the C input, and induced voltages generated in the coils of the step motor 110 at the "H" level are I1, I2 It is taken out at a predetermined timing from the input, and it is determined whether the step motor 110 is rotating or not rotating at the time of 2-second hand movement. When it is detected that the step motor 110 cannot move for 2 seconds due to the voltage drop, the non-rotation detection signal P122 of “H” level is output from the O output.
The determination of rotation or non-rotation is normally performed even in a normal state (1 second hand movement state) (so-called load compensation function), but is not shown here and will not be described.
[0012]
111First voltage detection meansWhen the voltage detection circuit detects the charging voltage of the large-capacitance capacitor 2 at an arbitrary sampling timing and detects that the voltage is lower than an arbitrary voltage value (1.15 V in the conventional example), “ An H ″ level voltage detection signal P111 is output.
112 isSecond voltage detection meansWhen the second voltage detection circuit detects the charging voltage of the small-capacitance capacitor 3 at an arbitrary sampling timing and detects that the voltage has risen above an arbitrary voltage value (1.3 V in this conventional example). , “L” level second voltage detection signal P112 is output.
Reference numeral 113 denotes a third voltage detection circuit, which detects the charging voltage of the large-capacitance capacitor 2 at an arbitrary sampling timing, and detects that it has risen from an arbitrary voltage value (2.6 V in this conventional example). In this case, the third voltage detection signal P113 of “L” level is output.
[0013]
Reference numeral 114 denotes an oscillation stop detection circuit, which outputs an oscillation stop detection signal P114 when the oscillation stops immediately before starting.
Reference numeral 115 denotes a reset circuit which is linked to the crown, and an “H” level reset signal P115 is output with the crown pulled.
[0014]
Reference numeral 118 denotes a power supply selection circuit. When the oscillation stop signal P114 via the OR gate 131 is inputted to the R terminal or when the voltage detection signal P111 from the voltage detection circuit 111 via the OR gate 131 is inputted, the “L” level. When the voltage detection signal P111 from the voltage detection circuit 111 via the inverter 116 is input to the S terminal, the power supply selection signal P118 that is at the “H” level is output from the Z output.
119 isStop memory meansThis is a stop memory circuit. When the oscillation stop detection signal P114 via the OR gate 117 is input to the S terminal or the non-rotation detection signal P122 via the OR gate 117 is input, it becomes “H” level and reset to the R terminal. When the reset signal P115 from the circuit 115 is input, a stop storage signal P119 that is at "L" level is output from the Z output.
[0015]
A discharge control circuit 127 includes an inverter 123, an OR gate 124, and an AND gate 125. When the power supply is the small-capacitance capacitor 3 and the 2-second hand movement state at the time of the quick start, when the overcharge of the small-capacitance capacitor 3 is detected and when the overcharge of the large-capacity capacitor 2 is detected, the “L” level discharge signal P125 is output.
A 2-second hand movement mode detection circuit 126 includes an inverter 120 and an AND gate 121. The AND gate 121 receives the voltage detection signal P111 from the voltage detection circuit 111 and the stop storage signal P119 from the stop storage circuit 119 via the inverter 120, and the 2-second hand movement mode detection signal P121 at the “H” level during the two-second movement. Is output.
[0016]
Next, the operation of the solar electronic timepiece having the above configuration will be described.
First, the operation at the quick start will be described.
When light strikes in the stop state, the oscillation stop detection signal P114 is output from the oscillation stop detection circuit 114.
The oscillation stop detection signal P114 plays the role of initial setting of the timepiece circuit 100.
The oscillation stop detection signal P114 is input to the R terminal of the power supply selection circuit 118 through the OR gate 131, and the power supply selection circuit 118 outputs a power selection signal P118 of “L” level. The power switching means 7 receives the “L” level power selection signal P118 at the gate input, and the large capacitor 2 is hardly charged, so the small capacitor 3 is selected. Since the small-capacitance capacitor 3 has a small capacitance, it immediately becomes a voltage at which the timepiece circuit 100 can operate.
Further, the signal is input to the S terminal of the stop memory circuit 119 via the OR gate 117, and the stop memory circuit 119 outputs the “H” level stop memory signal P 119.
When a potential is applied to the clock circuit 100, the reference signal source 101 starts oscillating, and the signal group P102 is output from the frequency dividing stage 102, and the 1-second hand-operated pulse creating circuit 103, the 2-second hand-operated pulse creating circuit 104, and the irregular 2 seconds. The hand movement pulse generation circuit 105 starts to generate a 1 second hand movement pulse P103, a 2 second hand movement pulse P104, and an irregular 2 second hand movement pulse P105, respectively. Since the “H” level stop storage signal P119 is input to the C input, the second selection means 108 selectively outputs the irregular 2-second hand movement pulse P105 regardless of the selection output of the first selection means 107 described later. An irregular time warning state is displayed by driving the irregular 2-second hand movement pulse P105.
In addition, since the charging voltage of the large-capacitance capacitor 2 is lower than 1.15 V, the voltage detection circuit 111 outputs the “H” level voltage detection signal P111. Accordingly, the first selection means 107 selects and outputs the 2-second hand movement pulse P104 since the "H" level voltage detection signal P111 is input to the C input.
The voltage detection signal P111 is also input to the R terminal of the power supply selection circuit 118 via the OR gate 131. The power supply selection circuit 118 outputs the power selection signal P118 of “L” level, and the power supply continues to select the small capacitor 3. The
[0017]
In this state, when the crown is pulled, the reset circuit 115 outputs the reset signal P115 at “H” level. Since the 1-second hand pulse generation circuit 103, the 2-second hand pulse generation circuit 104, and the irregular 2-second hand pulse generation circuit 105 are all input with the reset signal P115 to the R terminal, the output stops. Further, since the reset signal P115 is also input to the R terminal of the stop memory circuit 119, the "L" level stop memory signal P119 is output, and the second selection means 108 has the C input from the "H" level to the "H" level. The mode is switched to the L ″ level, and the 2-second hand movement pulse P104 is selected.
When the time is adjusted by rotating the crown and the crown is pushed in to the second, the reset signal P115 from the reset circuit 115 is canceled, and the output of the 2-second hand movement pulse P104 starts about 2 seconds later. The charging warning state is displayed by driving the 2-second hand movement pulse P104.
[0018]
In the charge warning state (two-second hand movement state), the non-rotation detection circuit 122 inputs the “H” level two-second hand movement mode detection signal P121 to the C input, and thus the rotation of the step motor 110 during the two-second hand movement. The non-rotation determination is performed. When it is detected that the step motor 110 cannot move for 2 seconds due to the voltage drop, the non-rotation detection signal P122 of “H” level is output.
Further, the solar cell 1 generates a voltage of about 2.4 V or more (in the case of four-stage connection in series) as long as it is exposed to light even at low illuminance. Therefore, when the small-capacitance capacitor 3 is a power source, even if the diode drop of the backflow prevention diode 4 is pulled, about 1.8 V or more (when the diode drop is 0.6 V) is applied to the timepiece circuit 100.
When the second voltage detection circuit 112 detects that the charging voltage of the small-capacitance capacitor 3 has risen from 1.3 V, it outputs a second voltage detection signal P112 of “L” level. The discharge control circuit 127 receives the “L” level second voltage detection signal P 112, the “L” level power supply selection signal P 118, and the “H” level 2-second hand movement mode detection signal P 121 via the inverter 123. , The “L” level discharge signal P125 is output, and charging is prohibited by the overcharge prevention means 8. When the charging voltage of the small-capacitance capacitor 3 is lowered from 1.3 V by moving the hand, the prohibition of charging by the overcharge preventing means 8 is released.
As described above, the charging potential of the small capacitor 3 applied to the timepiece circuit 100 does not exceed 1.3 V when the power source is in the 2-second hand movement state of the small capacitor 3. This is because the operation of the non-rotation detection circuit 122 for the purpose of detecting the rotation and non-rotation of the motor at the time of voltage drop cannot be guaranteed at 1.3 V or higher.
[0019]
  The time division signal P106 from the time division signal generation circuit 106 has a period of 1 second,5It is output at the timing shown in (d), and the large-capacity capacitor 2 is charged at the “H” level, and the small-capacitance capacitor 3 is charged at the “L” level. Incidentally, the timing of moving the hand is the charging timing of the large-capacity capacitor 2.
[0020]
In this charge warning state (2 second hand movement state), when the light is continuously applied and the charging potential of the large-capacitance capacitor 2 becomes higher than 1.15 V, the voltage detection signal P111 from the voltage detection circuit 111 changes from “H” level to “L”. Switch to level.
Since the voltage detection signal P111 is input to the S terminal via the inverter 116, the power supply selection circuit 118 outputs the “H” level power supply selection signal P118. Since the power selection signal P118 of “H” level is input to the gate input of the power switching means 7, the power is connected to the small capacitor 3 and the large capacitor 2 in parallel. At the same time, since the first selection means 107 switches the C input from the “H” level to the “L level”, the one-second hand movement pulse P103 is selectively output. The C input of the second selection means 108 is also at the “L” level. Since the stop memory signal P119 is input, the 1-second hand movement pulse P103 is selectively output, and the normal state is displayed by driving the 1-second hand movement pulse P103.
Further, the non-rotation detection circuit 122 stops the determination of the rotation or non-rotation of the step motor 110 because the “L” level 2-second hand movement mode detection signal P121 is input to the C input.
[0021]
In the normal state (1 second hand movement state), further irradiation of light continues, and when the charging potential of the large-capacitance capacitor 2 rises and the charging potential rises from 2.6 V, the third voltage detection circuit P113 detects the third voltage. The signal P113 is switched from the “H” level to the “L” level. Since the discharge control circuit 127 receives the “L” level third voltage detection signal P113, the discharge control circuit 127 outputs the “L” level discharge signal P125, and charging is prohibited by the overcharge prevention means 8. When the charging voltage drops below 2.6V by moving the hand, the prohibition of charging by the overcharge preventing means 8 is released. In the one-second movement state, the voltage applied to the large-capacitance capacitor 2 does not exceed 2.6V. This is because the rated voltage value of the large-capacitance capacitor 2 is 2.6V.
[0022]
In the above-described normal state (1 second hand movement state), when light irradiation is stopped and the charging potential of the large-capacitance capacitor 2 falls below 1.15 V, the voltage detection signal P111 from the voltage detection circuit 111 changes from “L” level to “ Switch to H ”level.
Since the C input is switched from the “L” level to the “H” level in the first selection means 107, the 2-second hand movement pulse P104 is selectively output. The C input of the second selection means 108 is the “L” level stop memory. Since the signal P119 remains input, the 2-second hand movement pulse P104 is selected and output, and the charge warning state is displayed by driving the 2-second hand movement pulse P104. The non-rotation detection circuit 122 is at the “H” level at the C input. Since the 2-second hand movement mode detection signal P121 is input, determination of whether the step motor 110 is rotating or not is started.
Further, since the power selection signal P118 from the power selection circuit 118 is switched from the “H” level to the “L” level, the power switching means 7 is turned off and the large capacity capacitor 2 through the small capacity capacitor 3 and the backflow prevention diode 9 is turned on. Are connected in parallel, and the power source is the large-capacitance capacitor 2 through the backflow prevention diode 9. The reason why the power supply switching means 7 is turned off is to cope with the quick start described above. The reason why the large-capacitance capacitor 2 is connected in parallel via the backflow prevention diode 9 is to extend the duration of the charging warning state (two-second hand movement state). Immediately after the charge warning state (2 second hand movement state) is switched, the power source applied to the clock circuit 100 is not 1.15V but 0.95V (diode drop is 0.2V).
[0023]
If the charging potential of the large-capacitance capacitor 2 further decreases due to the absence of light irradiation in the charging warning state (2 second hand movement state), the step motor 110 becomes non-rotated due to the voltage drop, and the non-rotation detecting circuit 122 An “H” level non-rotation detection signal P122 is output. Since the stop memory circuit 119 inputs the non-rotation detection signal P122 to the S terminal via the OR gate 117, the stop memory circuit 119 outputs the “H” level stop memory signal P119. Since the second selection means 108 inputs the stop memory signal P119 of "H" level to the C input, it outputs the irregular 2-second hand movement pulse P105 again, and a time error warning display indicating that the clock is out of order is displayed. The stepping motor 110 continues to operate for an irregular 2 seconds until the motor VEND (minimum operating voltage, approximately 0.9 V in the conventional example) is reached. The timepiece circuit 100 continues to output the irregular 2-second hand movement pulse P105 until the circuit VEND (about 0.8 V in the conventional example) even when the step motor 110 is stopped.
[0024]
Next, the hand movement pulses of the solar electronic timepiece with warning display will be described with reference to FIG.
FIG. 5A shows a one-second hand movement pulse P103.
In this case, the display is a normal display, and the charging potential of the large-capacitance capacitor 2 is equal to or higher than a voltage level at which a 1-second hand movement of 1.15 V or more is possible. The voltage detection circuit 111 outputs an “L” level voltage detection signal P111, and the stop storage circuit 119 outputs an “L” level stop storage signal P119. As a result, the 1-second hand movement pulse P103 from the 1-second hand movement pulse generation circuit 103 is selectively output via the first selection means 107 and the second selection means 108.
[0025]
FIG. 5B shows a 2-second hand movement pulse P104.
In this case, the display is a charging warning display, and the charging potential of the large-capacitance capacitor 2 is a voltage level of 1.15 V or less. The voltage detection circuit 111 outputs an “H” level voltage detection signal P111, and the stop storage circuit 119 outputs an “L” level stop storage signal P119. As a result, the 2-second hand movement pulse P104 from the 2-second hand movement pulse generation circuit 104 is selectively output via the first selection means 107 and the second selection means 108.
The power source of the timepiece circuit 100 is in a state where the small capacitor 3 and the large capacitor 2 via the backflow prevention diode 9 are connected in parallel. During the quick start when the large-capacitance capacitor 2 is hardly charged, the small-capacitance capacitor 3 is the power source. When the large-capacity capacitor 2 is charged to some extent, the large-capacitance capacitor 2 via the backflow prevention diode 9 is the power source. Yes.
[0026]
  FIG. 5C shows an irregular 2-second hand movement pulse P105. In this case, the display is a warning of incorrect time, and warns that the time is incorrect. By changing the hand movement interval every 2 seconds,5A warning different from the 2-second hand movement display state shown in FIG. When light is emitted from the stopped state and the oscillation stop detection circuit 114 is operated by the small-capacitance capacitor 3 for quick start, or when there is no light irradiation with a charging warning display (2 second hand movement), the large-capacitance capacitor 2 Is when the stepping motor 110 stops. In both cases, since the stop storage signal P119 of “H” level is output from the stop storage circuit 119, the irregular 2 seconds from the irregular 2 second hand movement creation circuit 105 via the first selection means 107 and the second selection means 108. The hand movement pulse P105 is selected and output.
[0027]
[Problems to be solved by the invention]
However, as described above, the solar electronic timepiece with a warning display of the conventional example, when the light irradiation is stopped in the 2-second hand movement state (charging warning state), the power supply switching means 7 is turned off, so that the timepiece The power source of the circuit 100 is the large-capacitance capacitor 2 through the backflow prevention diode 9, and only the voltage obtained by subtracting the diode drop from the original voltage of the large-capacity capacitor 2 was applied. Therefore, there has been a problem that the duration of the charging warning state (2 second hand movement state) is shortened.
Further, in the charging warning state at the time of quick start (two-second hand movement state), the small-capacitance capacitor 3 was not charged to 1.3 V or more so that the non-rotation detecting circuit 122 can correctly detect the rotation and non-rotation. Therefore, even if the user receives a charging warning by moving the hand for 2 seconds and charges the watch with light, the charging potential of the small-capacitance capacitor 3 which is a power source is only 1.3 V, and the charging is stopped when the hand movement starts. There was also a problem that the watch stopped immediately.
The object of the present invention is to solve the above-mentioned problems and to increase the duration in the charging warning state (2 second hand movement state) due to the absence of light irradiation and the charging warning state (2 second hand movement state) at the time of quick start, respectively. It is to provide a solar clock with a warning display.
[0028]
[Means for Solving the Problems]
  The configuration of the rechargeable timepiece and the power supply method according to the present invention for achieving the above object are as follows.
  As a rechargeable watch configuration, power generation meansWhen, Large capacity power storage means and small capacity power storage means charged by the power generation meansWhenThe large-capacity storage meansTheFrom power supply switching means for switching whether or not to connect the small capacity power storage means in parallelComposedPower supply means; first voltage detection means for detecting a predetermined first voltage value of the large-capacity storage means; a motor; a rotation detection means for detecting rotation and non-rotation of the motor; and driving the motor A normal pulse creating means for creating a drive pulse, a first warning pulse creating means for creating a first warning pulse, and a second warning pulse creating means for creating a second warning pulse,SaidThe first warning pulse is selectively output by a signal from the first voltage detection means,SaidThe second warning pulse isrotationIn a rechargeable timepiece that is selectively output by a signal from the detection means,
  The power switching means is theLarge capacity storage meansSaidControl to switch to a parallel connection state with small-capacity storage meansAs performed when the voltage of the large-capacity storage means is larger than the predetermined first voltage valueControlled,SaidLarge capacity storage meansSaidControl to switch to a state where the parallel connection with the small-capacity storage means is separatedSaidIt is configured to be controlled by non-rotation information from the rotation detection means,
  Further, stop storage means for storing non-rotation information from the rotation detection means,
Input prohibition means for controlling non-rotation information from the rotation detection means;SaidA second voltage detection means for detecting a predetermined second voltage value of the small-capacity storage means, and the second voltage detection meansSaidWhen an increase in the voltage of the small capacity storage means is detectedSaidThe non-rotation information from the rotation detection unit is not input to the stop storage unit by the input prohibition unit.
  The power supply method includes a first voltage detection step for receiving a predetermined first voltage value detection of the large-capacity storage unit charged by the power generation unit, a rotation detection step for receiving rotation and non-rotation detection of the motor, Small capacity storage meansSaidControl to switch to a parallel connection state with large-capacity storage meansWhen the voltage of the large-capacity storage means is larger than the predetermined first voltage valueSpecified,SaidLarge capacity storage meansSaidThe control for switching to a state in which the parallel connection with the small-capacity storage means is separated includes a power supply switching step specified by non-rotation information from the rotation detection step.
[0029]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 2 shows the time division charging method of the present invention.Rechargeable electronic watchIt is a whole block diagram which shows the solar electronic timepiece with a warning display. The same reference numerals as those in the whole block diagram of the conventional time-division charging type solar electronic timepiece with warning display shown in FIG.
The difference from the overall block diagram of the conventional time-division charging type solar electronic timepiece with warning display is that the backflow prevention diode 9 is eliminated. The elimination of the backflow prevention diode 9 is effective in reducing both space and cost.
[0030]
FIG. 1 is a block diagram showing a timepiece circuit 100 of the present invention. Similarly, the same reference numerals as those in the block diagram of the conventional timepiece circuit 100 in FIG.
Reference numeral 118 denotes a power supply selection circuit. When the oscillation stop signal P114 via the OR gate 117 is input to the R terminal or when the non-rotation detection signal P122 is input via the OR gate 117, the power selection circuit 118 becomes “L” level. When a voltage detection signal P111 from the voltage detection circuit 111 via the inverter 116 is input, a power supply selection signal P118 that becomes “H” level is output from the Z output.
Reference numeral 112 denotes second voltage detection means for detecting the charging voltage of the small capacitor 3 at an arbitrary sampling timing and detecting that the voltage has risen from an arbitrary voltage value (1.8 V in this embodiment). In this case, an “L” level second voltage detection signal P112 is output.
Reference numeral 130 denotes an input prohibiting means, which includes an AND gate 128 and an OR gate 129. The second voltage detection signal P112 from the second voltage detection circuit 112, the power supply selection signal P118 from the power supply selection circuit 118, and the non-rotation detection signal P122 from the non-rotation detection circuit 122 are input. When the second voltage detection signal P112 of L level is input, a signal of "L" level is output regardless of the output of the non-rotation detection signal P122.
[0031]
Next, the operation of the embodiment of the present invention will be described.
In the normal state (1 second hand movement state), the power source is the large-capacitance capacitor 2. In this state, when the irradiation of light is eliminated and the charging potential of the large-capacitance capacitor 2 falls below 1.15 V, the voltage detection signal P111 from the voltage detection circuit 111 is switched from the “L” level to the “H” level. The stop storage signal P119 remains at “L” level.
As a result, the 2-second hand movement pulse P104 from the 2-second hand movement pulse generation circuit 104 is selected and output via the first selection means 107 and the second selection means 108, and the charging warning state (two-second hand movement state) is entered.
The non-rotation detection circuit 122 starts the determination of the rotation or non-rotation of the step motor 110 since the “H” level 2-second hand movement mode detection signal P121 is input to the C input.
Since the power supply selection signal P118 from the power supply selection circuit 118 remains at the “H” level, the large-capacitance capacitor 2 remains selected as the power supply.
[0032]
If there is no light irradiation in the charging warning state (2 second hand movement state) and the charging potential of the large-capacitance capacitor 2 further decreases, the stepping motor 110 will not rotate due to the voltage drop (approximately 0.9V) and will not rotate. The detection circuit 122 outputs an “H” level non-rotation detection signal P122.
Since the power selection circuit 118 inputs the non-rotation detection signal P122 to the R terminal via the OR gate 117, the power selection circuit 118 outputs the power selection signal P118 of "L" level, and the small capacitor 3 is selected as the power source.
At the same time, the stop memory circuit 119 inputs the non-rotation detection signal P122 to the S terminal via the OR gate 117, and therefore outputs the “H” level stop memory signal P119. Since the second selection means 108 inputs the “H” level stop memory signal P119 to the C input, the second selection means 108 outputs the irregular 2-second hand movement pulse P105 again, and enters a time error warning state which means that the clock is out of order. Since the small-capacitance capacitor 3 has a small capacitance, the clock circuit 100 stops due to a voltage drop when the irregular 2-second hand movement pulse P105 is output for a while. Compared to the conventional example, the duration of the charging warning state (2 second hand movement state) was extended by about 0.2 V.
[0033]
Next, the operation immediately after the quick start will be described.
When the small-capacitance capacitor 3 is selected as the power source, the crown is pulled, the time is adjusted by rotation, and the time is pushed in according to the correct second, and the reset signal P115 from the reset circuit 115 is released. The output of the 2-second hand movement pulse P104 starts about 2 seconds later. Charging warning status is displayed by moving the hands for 2 seconds.
Further, in the charging warning state (two-second hand movement state), the non-rotation detection circuit 122 determines whether the step motor 110 is rotating or not because the “H” level two-second hand movement mode detection signal P121 is input to the C input. To do.
[0034]
When charging is performed by applying light in this charging warning state (2 second hand movement state), 1.8 V or more is charged to the small-capacitance capacitor 3 even with weak light. The second voltage detecting means 112 raises the detected voltage by 0.5 V compared to the conventional example to 1.8 V, which is just at a level where overcharge prevention works.
When it is detected that the charging voltage of the small-capacitance capacitor 3 has risen above 1.8V, the second voltage detection signal P112 of “L” level is output.
The discharge control circuit 127 receives the “L” level second voltage detection signal P 112, the “L” level power supply selection signal P 118, and the “H” level 2-second hand movement mode detection signal P 121 via the inverter 123. , The “L” level discharge signal P125 is output, and charging is prohibited by the overcharge prevention means 8.
This is because the driving of the step motor 110 by the 2-second hand movement pulse P104 cannot be guaranteed at 1.8 V or higher.
[0035]
At the same time, the input prohibition means 130 also receives the “L” level second voltage detection signal P112 from the second voltage detection means 112 and the “L” level power supply selection signal P118 from the power supply selection circuit 118. The output of the non-rotation detection signal P122 from the non-rotation detection circuit 122 is prohibited, and an “L” level signal is output.
As a result, the rotation potential of the step motor 110 is erroneously detected due to the charging potential of the small capacitor 3 being 1.3 V or more, and the time is not distorted, but the time distorted warning state (anomalous 2-second operation) State). In addition, the duration of the charge warning state (2 second hand movement state) at the time of quick start is extended by about 0.6 V compared to the conventional example.
[0036]
As described above, in the present invention, the step motor 110 is not rotated from the detection of the large capacity capacitor 2 of 1.15 V or less from the detection of the large capacity capacitor 2 to the abolition of the backflow prevention diode 9 and the OFF control of the power supply switching means 7. By switching to detection, the stop voltage of the clock operation decreased from 1.1V to 0.9V.
Further, when the charging potential of the small-capacitance capacitor 3 is higher than an arbitrary voltage value (1.8 V in this embodiment) during the 2-second operation using the small-capacitance capacitor 3 as a power source, the non-rotation detection circuit 122 The output of the non-rotation detection signal P122 is prohibited. The control for switching the power supply switching means 7 according to the present invention, which switches the small-capacitance capacitor 3 and the large-capacitance capacitor 2 to the parallel connection state, is controlled by the detection result of the voltage detection circuit 111. 3 is configured to be controlled by non-rotation information from the non-rotation detection circuit 122.
When the light irradiation is stopped in the 2-second hand movement state (charging warning state), the power supply switching means 7 is not turned off until the non-rotation of the step motor 110 is detected, and the power source of the timepiece circuit 100 turns off the backflow prevention diode 9. The large-capacitance capacitor 2 is supplied through the path of the power supply switching means 7 without being interposed. In other words, since the voltage of the large-capacitance capacitor 2 that is not pulled by the diode drop is applied to the timepiece circuit 100 until the timepiece stops (step motor 110 detects non-rotation), a charge warning state due to the absence of light irradiation ( 2 second hand movement state) can be lengthened, and the watch can be prevented from stopping before the carrier notices it.
Further, according to the present invention, when the second voltage detection means detects a voltage increase of the small capacity storage means, the non-rotation information from the rotation detection means is not input to the stop storage means by the input prohibition means. That
In the charge warning state at the time of quick start (2 second hand movement state), the small-capacitance capacitor 3 is charged to a voltage of 1.3 V or more. Therefore, even if the watch of the wearer is not exposed to light for a short time with the sleeves of clothes in the charging warning state at the time of quick start (2 second hand movement state), charging is interrupted even if charging is interrupted. The potential has risen to 1.3V or higher and the watch will stop It is possible to prevent the clock from being stopped immediately even if the charging is interrupted in the state where the hand movement is started by extending the duration in the short span in the charging warning state (2 second hand moving state) at the quick start.
[0037]
【The invention's effect】
As described above, according to the present invention,, ChargeElectric warning state (2 second hand movement state)When the light irradiation is stopped, the voltage of the large-capacity storage means that does not draw the diode drop is supplied until the motor is detected to be non-rotated, so that the charging warning state (2 Second hand movement state) can be lengthened,Prevents the watch from stopping before the carrier is aware of it.StopIt has an effect.
[Brief description of the drawings]
FIG. 1 is a block diagram of a timepiece circuit of the present invention.
FIG. 2 is an overall block diagram of a solar timepiece with warning display according to the present invention.
FIG. 3 is a block diagram of a conventional timepiece circuit.
FIG. 4 is an overall block diagram of a conventional solar timepiece with warning display.
FIG. 5 is a waveform diagram of a solar clock with a warning display.
[Explanation of symbols]
1 Solar cell
2 Large capacity capacitors
3 Small capacitor
4, 5 Backflow prevention diode
6 Time sharing means
7 Power supply switching means
8 Overcharge prevention means
9 Backflow prevention diode
100 Clock circuit
112 Second voltage detection means
118 Power supply selection circuit
119 Stop memory circuit
122 Non-rotation detection circuit
126 2-second hand movement mode detection circuit
127 Discharge control circuit
130 Input prohibition means

Claims (3)

A power generation unit, composed of a power supply switching means for switching the bulk electricity storage unit and the small-capacity storage means to be charged from the power generating means, whether or not connected in parallel with the large capacity storage means and said small-capacity storage means Power supply means;
First voltage detection means for detecting a predetermined first voltage value of the large-capacity storage means;
A motor,
Rotation detection means for detecting rotation and non-rotation of the motor;
Normal pulse creating means for creating a drive pulse for driving the motor;
A first warning pulse creating means for creating a first warning pulse;
A second warning pulse creating means for creating a second warning pulse;
The first warning pulse is selected and output by the signal from the first voltage detecting means,
In the rechargeable timepiece wherein the second warning pulse is selectively output by a signal from the rotation detecting means,
The power switching means is
Wherein a mass storage means control a small capacity storage means to switch to the parallel connection state voltage of the large-capacity storage means is controlled so as to be performed when greater than a predetermined of said first voltage value, said mass rechargeable timepiece control said power storage means connected in parallel with the small-capacity storage means is switched to the state to be separated, characterized by being configured as to be controlled by the non-rotation information from the rotation detecting means. Furthermore,
Stop storage means for storing non-rotation information from the rotation detection means;
Input prohibition means for controlling non-rotation information from the rotation detection means;
A second voltage detecting means for detecting a second voltage value predetermined for the small capacity power storage means is provided,
Wherein the non-rotation information from the rotation detecting means by the input inhibition means is configured so as not inputted to the stop storage means when the said second voltage detection means detects the voltage rise of the small-capacity storage means The rechargeable timepiece according to claim 1. A first voltage detection step of receiving a predetermined first voltage value detection of the large-capacity storage means charged by the power generation means;
A rotation detection step for receiving detection of rotation and non-rotation of the motor;
Wherein the small-capacity storage means control the mass storage means to switch to the parallel connection state is selected when the voltage of the large-capacity storage means is greater than a predetermined of said first voltage value, the said mass storage means small volume Control for switching to a state in which the parallel connection with the power storage means is separated is a power switching step specified by non-rotation information from the rotation detection step,
A power supply method comprising:

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