ACTUATOR CONTROL APPARATUS
First Claim
1. An actuator control apparatus comprising:
- an analog-digital conversion circuit configured to sample a position detection signal with a first sampling period, convert the sampled signal into a digital signal, and output the digital signal, the position detection signal outputted from a position sensor corresponding to a position of a control target;
a servo circuit configured to calculate a displacement amount, by which the control target is to be displaced by an actuator, and output first servo control data corresponding to the calculated displacement amount, based on the position detection signal converted into the digital signal;
a sampling circuit configured to linearly interpolate the first servo control data, and output second servo control data sampled with a second sampling period shorter than the first sampling period; and
a driving circuit configured to drive the actuator in accordance with the second servo control data.
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Accused Products
Abstract
An actuator control apparatus includes an analog-digital conversion circuit, a servo circuit, a sampling circuit, and a driving circuit. The analog-digital conversion circuit is configured to sample a position detection signal with a first sampling period, convert the sampled signal into a digital signal, and output the digital signal, the position detection signal outputted from a position sensor corresponding to a position of a control target. The servo circuit is configured to calculate a displacement amount, by which the control target is to be displaced by an actuator, and output first servo control data corresponding to the calculated displacement amount, based on the position detection signal converted into the digital signal. The sampling circuit is configured to linearly interpolate the first servo control data, and output second servo control data sampled with a second sampling period shorter than the first sampling period.
5 Citations
20 Claims
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1. An actuator control apparatus comprising:
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an analog-digital conversion circuit configured to sample a position detection signal with a first sampling period, convert the sampled signal into a digital signal, and output the digital signal, the position detection signal outputted from a position sensor corresponding to a position of a control target; a servo circuit configured to calculate a displacement amount, by which the control target is to be displaced by an actuator, and output first servo control data corresponding to the calculated displacement amount, based on the position detection signal converted into the digital signal; a sampling circuit configured to linearly interpolate the first servo control data, and output second servo control data sampled with a second sampling period shorter than the first sampling period; and a driving circuit configured to drive the actuator in accordance with the second servo control data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An image pickup device comprising:
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a position sensor configured to output a position detection signal, which is an analog signal, corresponding to a position of diaphragm blades; an analog-digital conversion circuit configured to sample the position detection signal with a first sampling period, convert the sampled signal into a digital signal, and output the digital signal; a servo circuit configured to calculate a displacement amount, by which the diaphragm blades are to be displaced by an actuator, and output first servo control data corresponding to the calculated displacement amount, based on the position detection signal converted into the digital signal; a sampling circuit configured to linearly interpolate the first servo control data, and output second servo control data sampled with a second sampling period shorter than the first sampling period; and a driving circuit configured to drive the actuator in accordance with the second servo control data. - View Dependent Claims (12, 13, 14, 15)
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16. A method for controlling a diaphragm of an image pickup device, comprising:
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detecting a position of diaphragm blades; generating a position detection signal which is an analog signal; converting the position detection signal sampled with a first sampling period into a digital signal; calculating a displacement amount, by which the diaphragm blades are to be displaced by an actuator, based on the position detection signal converted into the digital signal; generating first servo control data corresponding to the calculated displacement amount; generating second servo control data sampled with a second sampling period shorter than the first sampling period, with the first servo control data being linearly interpolated; and driving the actuator in accordance with the second servo control data. - View Dependent Claims (17, 18, 19, 20)
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Specification