DEVIATION DETECTOR, DEVIATION CORRECTOR AND IMAGING DEVICE

• US 20090021589A1
• Filed: 12/05/2006
• Published: 01/22/2009
• Est. Priority Date: 12/28/2005
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Okada, Hiroyuki
• Granted Patent: US 8,022,999 B2
• Time in Patent Office: Days
• US Class Current: 348/208.100
• CPC Class Codes: G03B 2205/0007 Movement of one or more optical elements for control of motion blur
• CPC Class Codes: G03B 2217/005 Blur detection
• CPC Class Codes: G03B 5/00 Adjustment of optical system relative to image or object surface other than for focusing
• CPC Class Codes: H04N 2101/00 Still video cameras
• CPC Class Codes: H04N 23/68 for stable pick-up of the scene, e.g. compensating for camera body vibrations
• CPC Class Codes: H04N 23/6812 based on additional sensors, e.g. acceleration sensors
• CPC Class Codes: H04N 23/6815 by distinguishing pan or tilt from motion
• CPC Class Codes: H04N 23/687 by shifting the lens or sensor position

Abstract

The correction amounts of respective correction units 37 of first and second shake correction amount deriving units 38, 39 are alternately employed in every short period composed of a time shorter than a period up to a timing at which it is contemplated that the output from a first HPF 31 is approximately stabilized after a switch S1 is turned on, and the signals of shake correction amounts, which are obtained by subjecting the outputs from first integration units 35 to a correction of the correction amounts, are alternately employed as drive signals to be output to the X-axis and Y-axis actuators 27, 28. With this arrangement, a shake correction amount deriving unit, which is operated later than a shake correction amount deriving unit operated just before it, can derive a shake correction amount based on a state in which a first HPF 31 has a smaller output error.

Claims

1. A shake detection apparatus, characterized by comprising:

shake detection means for outputting an electric signal according to shake applied to the shake detection apparatus;

a plurality of shake correction amount deriving means having integration means for integrating the electric signal output from the shake detection means and deriving shake correction amounts for correcting shake shown by the electric signal output from the shake detection means; and

output means for selecting any of the plurality of shake correction amount deriving means and outputting the shake correction amount derived by the selected shake correction amount deriving means as a shake correction amount used to correct the shake applied to the shake detection apparatus.

2. A shake detection apparatus according to claim 12, characterized in that the shake correction amount deriving means comprises:

first integration means for integrating the electric signal output from the shake detection means;

second integration means for integrating the output from the first integration means; and

correction means for correcting the output from the first integration means using the output from the second integration means after a second predetermined time has passed from the timing at which the first integration means starts an operation.

3. A shake detection apparatus according to claim 2 characterized in that the first and second predetermined times are made to the same time.

4. A shake detection apparatus according to claim 2, characterized in that the output means carries out the selection when a correction is carried out by the correction means.

5. A shake detection apparatus according to claim 2, characterized by comprising:

storage means for storing a correction amount used by correction means of the shake correction amount deriving means selected by the output means,

wherein the output means compares a correction amount of this time used by correction means of any one of shake correction amount deriving means which are not selected with the latest correction amount stored by the storage means and selects shake correction amount deriving means corresponding to a smaller correction amount as well as outputs a shake correction amount derived based on the smaller correction amount as a shake correction amount used to correct the shake applied to the shake detection apparatus.

6. A shake detection apparatus according to claim 2, characterized in that the correction means comprises:

multiplication means for multiplying the output of this time of the second integration means by a predetermined coefficient; and

subtraction means for subtracting a multiplied value obtained by a multiplication processing of the multiplication means from the output of next time from the first integration means and outputting a subtracted value to the first integration means.

7. A shake detection apparatus according to claim 12, characterized in that when the shake correction amount deriving means selected by the output means is changed, the control means temporarily interrupts the operation of any of the shake correction amount deriving means which are not selected by the output means and then resumes it.

8. A shake detection apparatus according to claim 1 comprises:

a high-pass filter comprising a capacitor and a resistor device,

wherein an electric signal output from the shake detection means is input to the high-pass filter, and the high-pass filter outputs the electric signal to the integration means after it eliminates a predetermined low frequency component signal from the electric signal.

12. A shake detection apparatus according to claim 1, further comprising control means for causing one shake correction deriving means among the plurality of shake correction amount deriving means to start an operation after a first predetermined time has passed from a timing at which other shake correction amount deriving means is caused to start an operation

9. (canceled)

10. (canceled)

11. (canceled)

13. A shake detection apparatus, characterized by comprising:

shake detection means for outputting an electric signal according to shake applied to the shake detection apparatus;

a plurality of shake correction amount deriving means having integration means for integrating the electric signal output from the shake detection means and deriving shake correction amounts for correcting shake shown by the electric signal output from the shake detection means;

output means for selecting any of the plurality of shake correction amount deriving means and outputting the shake correction amount derived by the selected shake correction amount deriving means as a shake correction amount used to correct the shake applied to the shake detection apparatus; and

drive means for driving a target based on the shake detection signal output from the output means to correct the shake.

14. An image pickup apparatus, characterized by comprising:

image pickup means for picking up a subject image;

shake detection means for outputting an electric signal according to shake;

a plurality of shake correction amount deriving means having integration means for integrating the electric signal output from the shake detection means and deriving shake correction amounts for correcting shake shown by the electric signal output from the shake detection means; and

output means for selecting any of the plurality of shake correction amount deriving means and outputting the shake correction amount derived by the selected shake correction amount deriving means as a shake correction amount used to correct the shake; and

drive means for driving a target based on the shake detection signal output from the output means to correct the shake.

15. A shake detection method, characterized by comprising:

a shake detection step for outputting an electric signal according to shake;

a plurality of shake correction amount deriving steps for integrating the electric signal output from the shake detection step and deriving shake correction amounts for correcting shake shown by the electric signal output from the shake detection step; and

output means for selecting any of the plurality of shake correction amount deriving steps and outputting the shake correction amount derived by the selected shake correction amount deriving step as a shake correction amount used to correct the shake.