CAMERA CONTROL DEVICE AND IMAGING DEVICE

• US 20190331983A1
• Filed: 12/13/2017
• Published: 10/31/2019
• Est. Priority Date: 12/21/2016
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: KABASAWA, HIDETOSHI, YAMASHITA, KOSEI, MURAKOSHI, SHO, MATSUMOTO, TOMOHIRO, SEGAMI, MASAHIRO
• Granted Patent: US 11,003,054 B2
• Time in Patent Office: Days
• CPC Class Codes: G01P 15/09 by piezoelectric pick-up
• CPC Class Codes: G01P 15/12 by alteration of electrical resistance G01P15/0897, G01P15/105 take precedence
• CPC Class Codes: G01P 15/125 by capacitive pick-up
• CPC Class Codes: G01P 15/18 in two or more dimensions
• CPC Class Codes: G03B 17/00 Details of cameras or camera bodies; Accessories therefor lens hoods or caps G03B11/04
• CPC Class Codes: G03B 17/02 Bodies
• CPC Class Codes: G03B 2205/0007 Movement of one or more optical elements for control of motion blur imaging systems in general using optical elements for stabilisation of the position of the image G02B27/64
• CPC Class Codes: G03B 2217/005 Blur detection
• CPC Class Codes: G03B 5/02 Lateral adjustment of lens
• CPC Class Codes: G03B 5/04 Vertical adjustment of lens; Rising fronts
• CPC Class Codes: G03B 7/091 Digital circuits
• CPC Class Codes: H04N 23/60 Control of cameras or camera modules
• CPC Class Codes: H04N 23/6812 based on additional sensors, e.g. acceleration sensors
• CPC Class Codes: H04N 23/685 performed by mechanical compensation

Abstract

[Object] Provided are a camera control device and an imaging device capable of improving camera shake correction accuracy.

[Solving Means] A camera control device according to an aspect of the present technology includes a control unit. The control unit generates a first control signal for camera shake correction on the basis of a first acceleration detection signal, a second acceleration detection signal, and an angular velocity signal, the first acceleration detection signal including information relating to an acceleration acting on a camera, the first acceleration detection signal having an alternating current (AC) waveform corresponding to the acceleration, the second acceleration detection signal including information relating to the acceleration, the second acceleration detection signal having an output waveform, an AC component corresponding to the acceleration being superimposed on a direct current (DC) component in the output waveform, the angular velocity signal including information relating to an angular velocity acting on the camera.

Claims

1. A camera control device, comprising

a control unit that generates a first control signal for camera shake correction on a basis of a first acceleration detection signal, a second acceleration detection signal, and an angular velocity signal, the first acceleration detection signal including information relating to an acceleration acting on a camera, the first acceleration detection signal having an alternating current (AC) waveform corresponding to the acceleration, the second acceleration detection signal including information relating to the acceleration, the second acceleration detection signal having an output waveform, an AC component corresponding to the acceleration being superimposed on a direct current (DC) component in the output waveform, the angular velocity signal including information relating to an angular velocity acting on the camera.

2. The camera control device according to claim 1, wherein

the control unit includes

an acceleration calculation unit that extracts a dynamic acceleration component and a static acceleration component from the acceleration on a basis of the first acceleration detection signal and the second acceleration detection signal, and

a correction signal generation circuit that generates the first control signal on a basis of the angular velocity signal and the dynamic acceleration component.

3. The camera control device according to claim 2, wherein

the correction signal generation circuit further generates a second control signal including information relating to posture of the camera with respect to a horizontal direction on a basis of the static acceleration component.

4. The camera control device according to claim 1, wherein

the first acceleration detection signal includes information relating to accelerations in directions of two axes orthogonal to an optical axis of the camera,

the angular velocity signal includes information relating to angular velocities around the two axes, and

the control unit acquires information relating to an angular velocity around an axis parallel to the optical axis of the camera on a basis of the information relating to the accelerations in the directions of the two axes.

5. The camera control device according to claim 2, wherein

the acceleration calculation unit includes a calculation circuit that extracts the static acceleration component from the acceleration on a basis of a difference signal between the first acceleration detection signal and the second acceleration detection signal.

6. The camera control device according to claim 5, wherein

the acceleration calculation unit further includes a gain adjustment circuit that adjusts gain of each signal so that the first acceleration detection signal and the second acceleration detection signal are at the same level.

7. The camera control device according to claim 5, wherein

the acceleration calculation unit further includes a correction circuit that computes a correction coefficient on a basis of the difference signal and corrects one of the first acceleration detection signal and the second acceleration detection signal using the correction coefficient.

8. The camera control device according to claim 1, further comprising

a detection unit including a movable portion, a piezoelectric first acceleration detection unit, and a non-piezoelectric second acceleration detection unit, the movable portion being movable upon receiving an acceleration, the piezoelectric first acceleration detection unit being provided on the movable portion to output the first acceleration detection signal, the non-piezoelectric second acceleration detection unit being provided on the movable portion to output the second acceleration detection signal.

9. The camera control device according to claim 8, wherein

the second acceleration detection unit includes a piezoresistive acceleration detection device.

10. The camera control device according to claim 8, wherein

the second acceleration detection unit includes a capacitive acceleration detection device.

11. An imaging device comprising:

an imaging device;

a lens for forming an image of a subject luminous flux on the imaging device;

a detection unit that outputs a first acceleration detection signal, a second acceleration detection signal, and an angular velocity signal, the first acceleration detection signal including information relating to an acceleration acting on a camera, the first acceleration detection signal having an AC waveform corresponding to the acceleration, the second acceleration detection signal including information relating to the acceleration, the second acceleration detection signal having an output waveform, an AC component corresponding to the acceleration is superimposed on a DC component in the output waveform, the angular velocity signal including information relating to an angular velocity acting on the camera; and

a control unit that generates a control signal for camera shake correction on a basis of the angular velocity signal, the first acceleration detection signal, and the second acceleration detection signal.

12. The imaging device according to claim 11, further comprising

a driving unit that moves the lens or the imaging device on a basis of the control signal.

13. The imaging device according to claim 11, further comprising

an electronic camera shake correction image processing circuit that generates a camera shake correction image on a basis of the control signal.