VIBRATION TYPE ACTUATOR CONTROL APPARATUS, APPARATUS HAVING THE SAME, AND STORAGE MEDIUM STORING VIBRATION TYPE ACTUATOR CONTROL PROGRAM
First Claim
1. A vibration type actuator control apparatus configured to control driving of a vibration type actuator configured to move a moving body that is one of the vibrator and a contact body that contacts a vibrator, the vibration type actuator including the vibrator in which a vibration is excited when a two-phase drive signal having a phase difference is applied to an electro-mechanical energy conversion element, the vibration type actuator control apparatus comprising a drive signal generator configured to generate the two-phase drive signal,wherein the drive signal generator changes a phase difference of the two-phase drive signal from an initial phase difference when the moving body is moved from a stopped state, the initial phase difference being determined based on a phase difference shift indicative of a shift from a phase difference set so as to stop the moving body.
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Abstract
A vibration type actuator control apparatus is configured to control driving of a vibration type actuator configured to move a moving body that is one of the vibrator and a contact body that contacts a vibrator. The vibration type actuator includes the vibrator in which a vibration is excited when a two-phase drive signal having a phase difference is applied to an electro-mechanical energy conversion element. The vibration type actuator control apparatus includes a drive signal generator configured to generate the two-phase drive signal. The drive signal generator changes a phase difference of the two-phase drive signal from an initial phase difference when the moving body is moved from a stopped state. The initial phase difference is determined based on a phase difference shift indicative of a shift from a phase difference set so as to stop the moving body.
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Citations
11 Claims
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1. A vibration type actuator control apparatus configured to control driving of a vibration type actuator configured to move a moving body that is one of the vibrator and a contact body that contacts a vibrator, the vibration type actuator including the vibrator in which a vibration is excited when a two-phase drive signal having a phase difference is applied to an electro-mechanical energy conversion element, the vibration type actuator control apparatus comprising a drive signal generator configured to generate the two-phase drive signal,
wherein the drive signal generator changes a phase difference of the two-phase drive signal from an initial phase difference when the moving body is moved from a stopped state, the initial phase difference being determined based on a phase difference shift indicative of a shift from a phase difference set so as to stop the moving body.
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7. An apparatus comprising:
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a vibration type actuator that includes a vibrator in which a vibration is excited when a two-phase drive signal having a phase difference is applied to an electro-mechanical energy conversion element, a contact body that contacts the vibrator, the vibration type actuator being configured to move a moving body that is one of the vibrator and the contact body; and a controller configured to generate the two-phase drive signal and to control driving of the vibration type actuator, wherein the controller changes a phase difference of the two-phase drive signal from an initial phase difference when the moving body is moved from a stopped state, the initial phase difference being determined based on a phase difference shift indicative of a shift from a phase difference set so as to stop the moving body. - View Dependent Claims (8)
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9. A non-transitory computer-readable storage medium for storing a program for controlling driving of a vibration type actuator configured to move a moving body that is one of a vibrator and a contact body that contacts a vibrator, the vibration type actuator including the vibrator in which a vibration is excited when a two-phase drive signal having a phase difference is applied to an electro-mechanical energy conversion element, the program comprising the steps of:
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setting an initial phase difference of the two-phase drive signal when the moving body is moved from a stopped state; and changing a phase difference of the two-phase drive signal from the initial phase difference, wherein the initial phase difference is determined based on a phase difference shift indicative of a shift from the phase difference set so as to stop the moving body.
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10. A vibration type actuator control apparatus configured to control driving of a vibration type actuator configured to move a moving body that is one of a vibrator and a contact body that contacts a vibrator, the vibration type actuator including the vibrator in which a vibration is excited when a two-phase drive signal having a phase difference is applied to an electro-mechanical energy conversion element, the vibration type actuator control apparatus comprising a drive signal generator configured to generate the two-phase drive signal,
wherein the drive signal generator changes a phase difference of the two-phase drive signal from an initial phase difference when the moving body is moved from a stopped state, the initial phase difference being determined based on a phase difference when the moving body stops from a drive state.
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11. A non-transitory computer-readable storage medium for storing a program for controlling driving of a vibration type actuator configured to move a moving body that is one of a vibrator and a contact body that contacts a vibrator, the vibration type actuator including the vibrator in which a vibration is excited when a two-phase drive signal having a phase difference is applied to an electro-mechanical energy conversion element, the program comprising the steps of:
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setting an initial phase difference of the two-phase drive signal when the moving body is moved from a stopped state; and changing a phase difference of the two-phase drive signal from the initial phase difference, wherein the initial phase difference is determined based on a phase difference when the moving body stops from a drive state.
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Specification