Electronic watch and method of charging the same
First Claim
1. An electronic watch comprising:
- an energy source that transforms an external energy into an electric energy and supplies a power supply voltage;
a booster circuit to generate a booster voltage from the power supply voltage;
a storage means for storing the power supply voltage or the booster voltage of the power supply voltage to supply a storage voltage;
a clock output means that has a watch system and a condenser of a small capacitance, that receives any of the power supply voltage or the booster voltage, and the storage voltage as a clock voltage, and supplies a plurality of logic signals;
a constant voltage circuit for generating a reference voltage from the clock voltage;
a voltage detection circuit that compares the power supply voltage or the booster voltage, the storage voltage, and the clock voltage selectively with a voltage set on the basis of the reference voltage and supplies a voltage detection signal;
a switching means provided with a plurality of switches, for controlling charging times of the storage means and the clock output means; and
a control means for controlling the switching means corresponding to a plurality of the logic signals and the voltage detection signal so that the charging time of the condenser of the clock output means becomes longer stepwise and the charging time of the storage means becomes shorter stepwise at a starting time of the clock system, and the charging time of the condenser of the clock output means becomes shorter stepwise and the charging time of the storage means becomes longer stepwise at a normal operation of the clock system.
2 Assignments
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Accused Products
Abstract
The electronic watch according to the invention comprises an energy source 1 (power supply), storage circuit 3, clock output unit 4, constant voltage circuit 5, voltage detection circuit 6, switching circuit 8, and control unit. The energy source 1 transforms external energy into electric energy and supplies a power supply voltage. The storage circuits 3 stores the power supply voltage or a booster voltage of the power supply voltage and thereby supplies a storage voltage. The clock output unit has a watch system and a condenser of a small capacitance, receives any of the power supply voltage or the booster voltage, and the storage voltage, and supplies a plurality of logic signals. The constant voltage circuit 5 generates a reference voltage from the clock voltage. The voltage detection circuit 6 compares the power supply voltage or booster voltage, storage voltage, and clock voltage selectively with a voltage set on the basis of the reference voltage and supplies a voltage detection signal. The switch circuit 8 is provided with a plurality of switches for controlling charging times of the storage circuit and the clock output unit. The control unit controls the switching circuit 8 by a plurality of pulse width variable switch control signals corresponding to a plurality of the logic signals and the voltage detection signal.
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Citations
22 Claims
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1. An electronic watch comprising:
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an energy source that transforms an external energy into an electric energy and supplies a power supply voltage; a booster circuit to generate a booster voltage from the power supply voltage; a storage means for storing the power supply voltage or the booster voltage of the power supply voltage to supply a storage voltage; a clock output means that has a watch system and a condenser of a small capacitance, that receives any of the power supply voltage or the booster voltage, and the storage voltage as a clock voltage, and supplies a plurality of logic signals; a constant voltage circuit for generating a reference voltage from the clock voltage; a voltage detection circuit that compares the power supply voltage or the booster voltage, the storage voltage, and the clock voltage selectively with a voltage set on the basis of the reference voltage and supplies a voltage detection signal; a switching means provided with a plurality of switches, for controlling charging times of the storage means and the clock output means; and a control means for controlling the switching means corresponding to a plurality of the logic signals and the voltage detection signal so that the charging time of the condenser of the clock output means becomes longer stepwise and the charging time of the storage means becomes shorter stepwise at a starting time of the clock system, and the charging time of the condenser of the clock output means becomes shorter stepwise and the charging time of the storage means becomes longer stepwise at a normal operation of the clock system. - View Dependent Claims (2, 3, 4)
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5. An electronic watch, comprising:
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an energy source that transforms an external energy into an electric energy and supplies a power supply voltage; a booster circuit to generate a booster voltage from the power supply voltage; a storage means for storing the power supply voltage or the booster voltage of the power supply voltage to supply a storage voltage; a clock output means that has a watch system and a condenser of a small capacitance, that receives any of the power supply voltage or the booster voltage, and the storage voltage as a clock voltage, and supplies a plurality of logic signals; a constant voltage circuit for generating a reference voltage from the clock voltage; a voltage detection circuit that compares the power supply voltage or the booster voltage, the storage voltage, and the clock voltage selectively with a voltage set on the basis of the reference voltage and supplies a voltage detection signal; a switching means provided with a plurality of switches, for controlling charging times of the storage means and the clock output means; and a control means for controlling the switching means corresponding to a plurality of the logic signals and the voltage detection signal, wherein the control means is provided with a switch control circuit that has a pulse width control circuit, and supplies a plurality of pulse width variable switch control signals to the switching means for controlling the charging times of the storage means and the clock output means by receiving the logic signals from the clock output means and the voltage detection signal from the voltage detection circuit. - View Dependent Claims (6, 7, 8, 9, 10)
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11. An electronic watch comprising:
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an energy source that transforms an external energy into an electric energy and supplies a power supply voltage; a storage means for storing the power supply voltage to supply a storage voltage; a clock output means that has a watch system and a condenser of a small capacitance, that receives the power supply voltage or the storage voltage as a clock voltage, and supplies a plurality of logic signals; a constant voltage circuit for generating a reference voltage from the clock voltage; a voltage detection circuit that compares the power supply voltage or the storage voltage, and the clock voltage selectively with a voltage set on the basis of the reference voltage and supplies a voltage detection signal; a switching means provided with a plurality of switches, for controlling charging times of the storage means and the clock output means; and a control means for controlling the switching means corresponding to a plurality of the logic signals and the voltage detection signal so that the charging time of the condenser of the clock output means becomes longer stepwise and the charging time of the storage means becomes shorter stepwise at a starting time of the clock system, and the charging time of the condenser of the clock output means becomes shorter stepwise and the charging time of the storage means becomes longer stepwise at a normal operation of the clock system. - View Dependent Claims (12, 13, 14)
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15. An electronic watch, comprising:
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an energy source that transforms an external energy into an electric energy and supplies a power supply voltage; a storage means for storing the power supply voltage supply voltage to supply a storage voltage; a clock output means that has a watch system and a condenser of a small capacitance, that receives the power supply voltage or the storage voltage as a clock voltage, and supplies a plurality of logic signals; a constant voltage circuit for generating a reference voltage from the clock voltage; a voltage detection circuit that compares the power supply voltage or the storage voltage, and the clock voltage selectively with a voltage set on the basis of the reference voltage and supplies a voltage detection signal; a switching means provided with a plurality of switches, for controlling charging times of the storage means and the clock output means; and a control means for controlling the switching means corresponding to a plurality of the logic signals and the voltage detection signal, wherein the control means is provided with a switch control circuit that has a pulse width control circuit, and supplies a plurality of pulse width variable switch control signals to the switching means for controlling the charging times of the storage means and the clock output means by receiving the logic signals from the clock output means and the voltage detection signal from the voltage detection circuit. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A method of charging an electronic watch, comprising the steps of:
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transforming an external energy into an electric energy supplying a power supply voltage; boosting the power supply voltage to supply a booster voltage; storing the power supply voltage or the booster voltage in a storage means to supply a storage voltage; providing a clock voltage to a clock output means, having a watch system and a condenser of a small capacitance, from at least one of the power supply voltage, the booster voltage, and the storage voltage; generating a plurality of logic signals from the clock output means; supplying a reference voltage from the clock voltage; comparing at least one of the power supply voltage, the booster voltage, and the storage voltage with a voltage set on the basis of the reference voltage to generate a voltage detection signal corresponding to the magnitude of the voltages; controlling charging times of the storage means and the clock output means based on switches controlled by the logic signals and the voltage detection signal, so that the charging time of the condenser of the clock output means becomes longer stepwise and the charging time of the storage means becomes shorter stepwise at a starting time of the clock system, and the charging time of the condenser of the clock output means becomes shorter stepwise and the charging time of the storage means becomes longer stepwise at a normal operation of the clock system.
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22. A method of charging an electronic watch, comprising the steps of:
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transforming an external energy into an electric energy supplying a power supply voltage; storing the power supply voltage in a storage means to supply a storage voltage; providing a clock voltage to a clock output means, having a watch system and a condenser of a small capacitance, from the power supply voltage or the storage voltage; generating a plurality of logic signals from the clock output means; supplying a reference voltage from the clock voltage; comparing the power supply voltage or the storage voltage with a voltage set on the basis of the reference voltage to generate a voltage detection signal corresponding to the magnitude of the voltages; controlling charging times of the storage means and the clock output means based on switches controlled by the logic signals and the voltage detection signal, so that the charging time of the condenser of the clock output means becomes longer stepwise and the charging time of the storage means becomes shorter stepwise at a starting time of the clock system, and the charging time of the condenser of the clock output means becomes shorter stepwise and the charging time of the storage means becomes longer stepwise at a normal operation of the clock system.
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Specification