摘要:
A secondary cell supplies drive power to a motor of an analogue electronic timepiece, and a state detection circuit detects whether or not a state at the time of driving the motor is a predetermined state. A cell voltage detection circuit detects a voltage of the secondary cell at intervals corresponding to a detection result by the state detection circuit. A control unit drives the motor by selecting a drive pulse of energy corresponding to a detection result of the cell voltage detection circuit out of drive pulses of different energies. When the state detection circuit detects that a state at the time of driving the motor is the predetermined state, the cell voltage detection circuit detects the voltage of the secondary cell at intervals shorter than intervals when the state detection circuit detects that the state at the time of driving the motors is not the predetermined state.
摘要:
A stepping motor control circuit includes a rotation detection circuit that detects an induced signal and detects whether or not the induced signal exceeds a predetermined reference threshold voltage in a detection segment having a plurality of detection areas, and a control unit that determines the state of rotation of a stepping motor on the basis of a pattern indicating whether or not the induced signals exceed the reference threshold voltage and, on the basis of the result of detection, controls the driving of the stepping motor with anyone of a plurality of main drive pulses different from each other in energy or a correction drive pulse having larger energy than the main drive pulse. An ineffective area is provided between at least the two detection areas, and the control unit determines the state of rotation of the stepping motor without considering the induced signal.
摘要:
It is configured to include: a secondary battery as a power supply that supplies power at least to a stepping motor; a rotation detection portion that detects a rotation state of the stepping motor; a control portion that drives the stepping motor by selecting a drive pulse having energy corresponding to the rotation state of the stepping motor from a plurality of drive pulses; and a solar battery that charges the secondary battery. Upon determination that it is possible to rotate the stepping motor by an overcharge indicating drive pulse having predetermined energy, the control portion drives the stepping motor by changing a current drive pulse to an overconsuming drive pulse having larger energy than the overcharge indicating drive pulse. It thus becomes possible to suppress deterioration of a secondary battery caused by overcharge without having to provide a dedicated voltage detection circuit, such as a comparator circuit.
摘要:
A stepping motor control circuit includes a rotation detection circuit that detects an induced signal and detects whether or not the induced signal exceeds a predetermined reference threshold voltage in a detection segment having a plurality of detection areas, and a control unit that determines the state of rotation of a stepping motor on the basis of a pattern indicating whether or not the induced signals exceed the reference threshold voltage and, on the basis of the result of detection, controls the driving of the stepping motor with anyone of a plurality of main drive pulses different from each other in energy or a correction drive pulse having larger energy than the main drive pulse. An ineffective area is provided between at least the two detection areas, and the control unit determines the state of rotation of the stepping motor without considering the induced signal.
摘要:
A power consumption control device includes a power consumption control unit that receives the output potential of a photovoltaic cell generating an electromotive force, receives the output potential of a secondary battery charged by the electromotive force of the photovoltaic cell, causes a timepiece device to transition to a power saving state where a clock operation of measuring time is stopped when the output potential difference of the secondary battery is not greater than a predetermined threshold value, and the secondary battery is in a non-charging state indicating a state where the output potential difference of the photovoltaic cell is not greater than the output potential difference of the secondary battery.
摘要:
An electronic timepiece can reduce a burden imposed on a user who performs a manipulation for correcting the positional displacement of a pointer when a position of the pointer is displaced due to the demonstration of the pointer movement. The electronic timepiece includes: a pointer which is rotated in a first direction based on a manipulation signal corresponding to a manipulation from the outside; and a control part which performs the demonstration of the pointer movement in which the pointer is rotated in a second direction opposite to the first direction and the first direction, wherein the pointer is positioned at a position where a rotational angle in the first direction from a preset reference position is smaller than a rotational angle in a second direction from the reference position.
摘要:
A voltage detection circuit detects a voltage of a secondary cell that powers a stepping motor. A rotation detection circuit detects a rotation state of the stepping motor, and a control unit selects a main driving pulse for driving the stepping motor based on the detected rotation state from plural kinds of driving pulses having different energies. An analog display unit announces that the voltage of the secondary cell becomes a predetermined reference voltage when the voltage detection circuit detects that the voltage of the secondary cell becomes the predetermined reference voltage. When the control unit selects a predetermined main driving pulse before the voltage detection circuit detects that the voltage of the secondary cell becomes a current reference voltage, the control unit sets the reference voltage to the predetermined reference voltage higher than the current reference voltage.
摘要:
The invention is intended to allow a motor to be driven normally even when an output voltage of a primary power source unit varies. A motor drive control unit configured to attenuate a charge of a secondary cell by an electromotive force of a solar cell to a level lower than the charge at that moment before driving the motor, and then intensify the charge of a level higher than the charge at that moment after having driven the motor is provided.
摘要:
Disclosed is a chronograph timepiece whose chronograph hands are electrically drive-controlled and mechanically zero-restoring-controlled, wherein it possible to perform a normal operation at the time of start operation and reset operation. After a mechanical control unit releases the setting of chronograph hands in response to the start operation of a start/stop button, a contact portion is placed in a start state, and an electrical control unit starts a time measurement operation to electrically hand-movement-drive the chronograph hands, and, after a contact portion is placed in a reset state in response to a reset operation of a reset button and the electrical control unit electrically resets the time measurement operation, the mechanical control unit mechanically zero-restores and sets the chronograph hands.
摘要:
Disclosed is a chronograph timepiece in which it is possible to prevent the battery reliability service life time from being exceeded even when the period of time that the chronograph function is used is short, making it possible to prevent failure generation in the chronograph timepiece due to liquid leakage. A 24-hour counter down-counts a period of time that has elapsed starting from 24 hours, and a chronograph counter down-counts the period of time that chronograph measurement operation is performed from a predetermined time; when the count values of the 24-hour counter and the chronograph counter become equal to each other, a processing unit consumes a battery for the residual period of time of the two counters by a battery power consuming unit.