Granted Patent B2

US 8,026,949 · App. 12/333,489 · Granted Sep 27, 2011

Abstract

Claims (29)

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;

a verifying-signal input circuit which inputs a signal used for verification, to said first equalizer; and

a control unit which verifies operations of the driver element, the position detecting element and said first equalizer, based on the vibration-component signal generated from the signal used for verification and the output signal of the position detecting element.

2. An image stabilization control circuit according to claim 1 , 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.

3. An image stabilization control circuit according to claim 1 , wherein said control unit verifies 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.

4. An image stabilization control circuit according to claim 2 , 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.

5. An image stabilization control circuit according to claim 1 , wherein said control unit verifies the operations thereof by verifying whether the amplitude of the output signal of the position detecting element added with the vibration-component signal is zero or not.

6. 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;

a verifying-signal input circuit which inputs a signal used for verification, to said first equalizer; and

a control unit which verifies an operation of said first equalizer based on the signal used for verification and the vibration-component signal,

wherein said control unit verifies whether a phase difference in between the signal used for verification and the vibration-component signal is 90 degrees or not.

7. 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 .

8. 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 6 .

Assignments (7)