Image shake correction device, control method thereof, and image pickup apparatus

Patent metadata

Field	Value
Publication number	US-2016018666-A1
Application number	US-201514791806-A
Country	US
Kind code	A1
Filing date	Jul 6, 2015
Priority date	Jul 16, 2014
Publication date	Jan 21, 2016
Grant date	—

Abstract

An image shake correction device comprising a first image shake correction lens and a second image shake correction lens for correcting an image shake of a subject image caused by shaking is provided. The image shake correction device executes correcting the image shake caused by the drive of the first image shake correction lens and the second image shake correction lens after correcting a drive deviation between the first image shake correction lens and the second image shake correction lens.

First claim

What is claimed is:

1 . An image shake correction device comprising:
first correction unit configured to correct an image shake of a subject image caused by shaking; and second correction unit configured to correct an image shake of a subject image caused by shaking that the first and second correction units are different location in an optical axis; and a control unit configured to control an execution of the correction of the image shake by a control of the first and second correction units after correcting a drive deviation between the first correction unit and the second correction unit.

2 . The image shake correction device according to claim 1 ,
wherein the control unit controls the first correction unit based on a shake signal indicating shaking detected by a detection unit, and wherein the control unit processes the shake signal by using a lens model having a drive characteristic with respect to a target position of the first correction unit, and controls the second correction unit based on the processed shake signal.

3 . The image shake correction device according to claim 2 ,
wherein the lens model is configured by a mathematical model indicating a frequency characteristic of a phase difference and an amplitude difference of a position of the first correction unit with respect to the target position of the first correction unit, and wherein the control unit processes the shake signal by using the mathematical model, outputs a target position signal of the second correction unit for controlling the second correction unit in synchronization with the first correction unit, and controls the second correction unit based on the target position signal.

4 . The image shake correction device according to claim 2 ,
wherein the lens model is provided for each drive condition including any one of at least a temperature change, drive amplitude, or a lens focal length, and wherein the control unit changes the lens model used for the processing of the shake signal, depending on the drive condition.

5 . The image shake correction device according to claim 1 ,
wherein the control unit controls the first correction unit based on a shake signal indicating shaking detected by a detection unit, obtains a position signal indicating a position of the first correction unit to be controlled, and controls the second correction unit based on a signal in which a high-frequency component of the obtained position signal has been cut.

6 . The image shake correction device according to claim 1 ,
wherein the control unit controls the first correction unit by using a control signal calculated based on a shake signal indicating shaking detected by a detection unit, obtains a position signal indicating a position of the first correction unit to be controlled, and controls the second correction unit based on a signal in which a high-frequency component of the obtained position signal has been cut and the control signal used for the control of the first correction unit.

7 . A control method of an image shake correction device including first correction unit for correcting an image shake of a subject image caused by shaking and second correction unit for correcting an image shake of a subject image caused by shaking that the first and second correction units are different location in an optical axis comprising:
controlling an execution of a correction of the image shake by a control of the first and second correction units after correcting a drive deviation between the first correction unit and the second correction unit.

8 . An image pickup apparatus comprising an image shake correction device, the image shake correction device comprising:
first correction unit configured to correct an image shake of a subject image caused by shaking; and second correction unit configured to correct an image shake of a subject image caused by shaking that the first and second correction units are different location in an optical axis; and a control unit configured to control an execution of the correction of the image shake by a control of the first and second correction units after correcting a drive deviation between the first correction unit and the second correction unit.

Assignees

• Canon Kk

Inventors

• Takeuchi Kenji

Classifications

• H04N23/687

  by shifting the lens or sensor position · CPC title

• G02B27/646 Primary

  compensating for small deviations, e.g. due to vibration or shake (movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68) · CPC title

• H04N23/6812

  based on additional sensors, e.g. acceleration sensors · CPC title

• H04N5/23287

  Electricity · mapped topic