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US 12,651,986 B2Granted
Actuator driving device and method of controlling actuator driving device
AssigneeCanon Kabushiki Kaisha
InventorTakayuki Taguchi
Life of this patent
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Abstract
An actuator driving device includes a driving coil that generates a driving force with first and second voltages; and a control unit, which sets one of the first and second voltages to a first pulse, sets the other one to a second pulse, and performs at least one of: a first control for modulating one pulse width of the first and second pulses with a change amount larger than that of the other pulse width so that a pulse width of ON time of the second pulse is within a pulse width of ON time of the first pulse; and a second control for modulating one pulse width of the first and second pulses with a change amount larger than that of the other pulse width so that the pulse width of the first pulse in ON time is within the pulse width of the second pulse in ON time.
Claims21
An actuator driving device comprising:
- a driving coil that has a first input terminal to which a first voltage is applied and a second input terminal to which a second voltage is applied, and generates a driving force for driving an actuator by applying the first voltage and the second voltage;
- and
- a control unit that controls the first voltage and the second voltage,
- wherein the control unit sets one of the first voltage and the second voltage to a first pulse, sets the other one of the first voltage and the second voltage to a second pulse, and performs the following:
- a first control for modulating a pulse width of one of the first pulse and the second pulse with a change amount of pulse width of the one of the first pulse and the second pulse so that a pulse width of the ON time of the second pulse is within a pulse width of the ON time of the first pulse, the change amount of pulse width of the one of the first pulse and the second pulse being larger than a change amount of pulse width of the other one of the first pulse and the second pulse in the first control;
- and
- a second control for modulating a pulse width of one of the first pulse and the second pulse with a change amount of pulse width of the one of the first pulse and the second pulse so that the pulse width of the first pulse in the ON time is within the pulse width of the second pulse in the ON time, the change amount of pulse width of the one of the first pulse and the second pulse being larger than a change amount of pulse width of the other one of the first pulse and the second pulse in the second control,
- wherein the control unit switches between the first control and the second control.
5 more elements
An actuator driving device comprising:
- a driving coil that has a first input terminal to which a first voltage is applied and a second input terminal to which a second voltage is applied, and generates a driving force for driving an actuator by applying the first voltage and the second voltage;
- and
- a control unit that controls the first voltage and the second voltage,
- wherein the control unit sets one of the first voltage and the second voltage to a first pulse, sets the other one of the first voltage and the second voltage to a second pulse, and performs at least one of the following:
- a first control for modulating a pulse width of one of the first pulse and the second pulse with a change amount of pulse width of the one of the first pulse and the second pulse so that a pulse width of the ON time of the second pulse is within a pulse width of the ON time of the first pulse, the change amount of pulse width of the one of the first pulse and the second pulse being larger than a change amount of pulse width of the other one of the first pulse and the second pulse in the first control;
- and
- a second control for modulating a pulse width of one of the first pulse and the second pulse with a change amount of pulse width of the one of the first pulse and the second pulse so that the pulse width of the first pulse in the ON time is within the pulse width of the second pulse in the ON time, the change amount of pulse width of the one of the first pulse and the second pulse being larger than a change amount of pulse width of the other one of the first pulse and the second pulse in the second control,
- wherein the control unit sets, in the first control, the first pulse and the second pulse such that a timing of a center of a pulse of the first pulse is within the pulse width of the second pulse, and
- wherein the control unit sets, in the second control, the first pulse and the second pulse such that a timing of a center of a pulse of the second pulse is within a pulse width of the first pulse.
6 more elements
An actuator driving device comprising:
- a driving coil that has a first input terminal to which a first voltage is applied and a second input terminal to which a second voltage is applied, and generates a driving force for driving an actuator by applying the first voltage and the second voltage;
- and
- a control unit that controls the first voltage and the second voltage,
- wherein the control unit sets one of the first voltage and the second voltage to a first pulse, sets the other one of the first voltage and the second voltage to a second pulse, and performs at least one of the following:
- a first control for modulating a pulse width of one of the first pulse and the second pulse with a change amount of pulse width of the one of the first pulse and the second pulse so that a pulse width of the ON time of the second pulse is within a pulse width of the ON time of the first pulse, the change amount of pulse width of the one of the first pulse and the second pulse being larger than a change amount of pulse width of the other one of the first pulse and the second pulse in the first control;
- and
- a second control for modulating a pulse width of one of the first pulse and the second pulse with a change amount of pulse width of the one of the first pulse and the second pulse so that the pulse width of the first pulse in the ON time is within the pulse width of the second pulse in the ON time, the change amount of pulse width of the one of the first pulse and the second pulse being larger than a change amount of pulse width of the other one of the first pulse and the second pulse in the second control;
- a first output unit that outputs the first voltage applied to the first input terminal;
- a second output unit that outputs the second voltage applied to the second input terminal;
- and
- a filter circuit,
- wherein the first output unit outputs the first voltage to the first input terminal via the filter circuit, and
- wherein second output unit outputs the second voltage to the second input terminal via the filter circuit.
10 more elements
A method of controlling an actuator driving device that has a driving coil for having a first input terminal to which a first voltage is applied and a second input terminal to which a second voltage is applied and generating a driving force for driving an actuator by applying the first voltage and the second voltage, the method comprising:
- setting one of the first voltage and the second voltage to a first pulse and the other of the first voltage and the second voltage to a second pulse;
- and
- switching between the following:
- a first control for modulating a pulse width of one of the first pulse and the second pulse with a change amount of pulse width of the one of the first pulse and the second pulse so that a pulse width of the ON time of the second pulse is within a pulse width of the ON time of the first pulse, the change amount of pulse width of the one of the first pulse and the second pulse being larger than a change amount of pulse width of the other one of the first pulse and the second pulse in the first control;
- and
- a second control for modulating a pulse width of one of the first pulse and the second pulse with a change amount of the one of the first pulse and the second pulse so that the pulse width of the first pulse in the ON time is within the pulse width of the second pulse in the ON time, the change amount of pulse width of the one of the first pulse and the second pulse being larger than a change amount of pulse width of the other one of the first pulse and the second pulse in the second control.
3 more elements
Dependencies are inferred from the claim text.