Image stabilization control circuit for correcting vibration-caused displacement of optical axis, and image pickup apparatus provided with the same
View Patent ↗A first equalizer generates a vibration-component signal indicating the amount of movement of an image pickup apparatus according to an output signal of a vibration detecting element for detecting the vibration of the image pickup apparatus. The second equalizer generates a drive signal used to control a driver element to correct the position of a lens or image pickup devices, based on the output signal of a position detecting element for detecting the position of the lens to be driven or the image pickup devices to be driven and the vibration-component signal. A control unit verifies the operations of the driver element, the position detecting element, the vibration detecting element and the first equalizer, based on the output signal of the position detecting element and the vibration-component signal.
1. An image stabilization control circuit for correcting an optical axis of an image pickup apparatus in response to a vibration thereof, the circuit comprising:
a first equalizer which generates a vibration-component signal indicating a amount of movement of the image pickup apparatus according to an output signal of a vibration detecting element for detecting the vibration of the image pickup apparatus;
a second equalizer which generates a drive signal used to control a driver element to correct the position of a lens or image pickup devices, based on an output signal of a position detecting element for detecting the position of the lens to be driven or the image pickup devices to be driven and the vibration-component signal; and
a control unit which verifies operations of the driver element, the position detecting element, the vibration detecting element and said first equalizer, based on the output signal of the position detecting element and the vibration-component signal,
wherein said control unit verifies the operations thereof by verifying whether a phase difference in between the output signal of the position detecting element and the vibration-component signal is zero or not.
2. An image stabilization control circuit according to claim 1 , wherein said control unit verifies the operations thereof by verifying whether the amplitudes of the output signal of the position detecting element and the vibration-component signal are opposite in polarity and equal to each other or not.
3. An image pickup apparatus, comprising:
the lens;
the image pickup devices;
the driver element;
the position detecting element;
the vibration detecting element; and
the image stabilization control circuit according to claim 1 .
4. An image stabilization control circuit for correcting an optical axis of an image pickup apparatus in response to a vibration thereof, the circuit comprising:
a first equalizer which generates a vibration-component signal indicating a amount of movement of the image pickup apparatus according to an output signal of a vibration detecting element for detecting the vibration of the image pickup apparatus;
a second equalizer which generates a drive signal used to control a driver element to correct the position of a lens or image pickup devices, based on an output signal of a position detecting element for detecting the position of the lens to be driven or the image pickup devices to be driven and the vibration-component signal; and
a control unit which verifies operations of the driver element, the position detecting element, the vibration detecting element and said first equalizer, based on the output signal of the position detecting element and the vibration-component signal,
wherein said control unit verifies the operations thereof by verifying whether the amplitudes of the output signal of the position detecting element and the vibration-component signal are opposite in polarity and equal to each other or not.