ANTI-SHAKE APPARATUS

Abstract

An anti-shake apparatus of a photographing apparatus comprises a hand-shake quantity detector and a controller. The hand-shake quantity detector has a first detector having an angular velocity sensor and has a second detector having an angular displacement sensor. The controller performs an anti-shake operation based on a first angular signal from the first detector and a second angular signal from the second detector.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The objects and advantages of the present invention will be better understood from the following description, with reference to the accompanying drawings in which:

FIG. 1 is a perspective view of a photographing apparatus of the embodiment, viewed from the front side of the photographing apparatus;

FIG. 2 is a front view of the photographing apparatus;

FIG. 3 is a side view of the photographing apparatus;

FIG. 4 is a construction diagram of the photographing apparatus;

FIG. 5 is a circuit construction diagram of the anti-shake unit of the photographing apparatus;

FIG. 6 is a front view of the driving unit of the anti-shake unit;

FIG. 7 is a side view of the driving unit of the anti-shake unit, viewed from the first horizontal driving coil side;

FIG. 8 is a construction diagram of a side part containing the circuit board depicted in FIG. 6;

FIG. 9 is a graph that shows characteristics of the pitching composite signal, the first pitching angular signal, and the second pitching angular signal.

FIG. 10 is a graph that shows a high-frequency element and a low-frequency element of the hand-shake; and

FIG. 11 is a construction diagram of the pitching inclination sensor and the rolling inclination sensor.

Claims

1. An anti-shake apparatus of a photographing apparatus, comprising: a hand-shake quantity detector that has a first detector having an angular velocity sensor and that has a second detector having an angular displacement sensor; anda controller that performs an anti-shake operation based on a first angular signal from said first detector and a second angular signal from said second detector.

2. The anti-shake apparatus according to claim 1, wherein said first detector has an integrated unit and a high-pass filter unit that removes a low-frequency element of a signal output from said angular velocity sensor to obtain a high-frequency signal that has had said low-frequency element removed, and said second detector has a hold unit and a low-pass filter unit that removes a high-frequency element of a signal output from said angular displacement sensor to obtain a low-frequency signal that has had said high-frequency element removed; said integrated unit integrating said high-frequency signal and generating said first angular signal based on the integrated high-frequency signal; andsaid hold unit holding an output value output from said low-pass filter unit based on said low-frequency signal at an anti-shake operation base time and outputting said second angular signal based on a differential between the held value by said hold unit and an output value output from said low-pass filter unit based on said low-frequency signal at a time after said anti-shake operation base time.

3. The anti-shake apparatus according to claim 2, wherein a cutoff frequency of said high-pass filter unit and a cutoff frequency of said low-pass filter unit have the same value.

4. The anti-shake apparatus according to claim 3, wherein said cutoff frequency of said high-pass filter unit and said low-pass filter unit is set to a value corresponding to a maximum value of a response frequency of said angular displacement sensor.

5. The anti-shake apparatus according to claim 4, wherein said cutoff frequency of said high-pass filter unit and said low-pass filter unit is from 2 to 3 Hz.

6. The anti-shake apparatus according to claim 1, wherein said controller specifies a hand-shake quantity based on a total value between said first angular signal and said second angular signal, and performs said anti-shake operation based on said total value.

7. The anti-shake apparatus according to claim 1, wherein said angular displacement sensor is an inclination angular sensor that detects an inclination angle of a pendulum.

8. The anti-shake apparatus according to claim 1, wherein said angular displacement sensor is an inclination angular sensor that has a pendulum having a magnet and has a hall sensor that detects a quantity of a magnetic field, between said magnet and said hall sensor, that changes corresponding to a swing of said pendulum.

9. The anti-shake apparatus according to claim 1, wherein said angular velocity sensor has a yawing angular velocity sensor and a pitching angular velocity sensor, and said angular displacement sensor has at least one of either a yawing angular sensor or a pitching angular sensor; said yawing angular velocity sensor detecting an angular velocity based on a yawing motion;said pitching angular velocity sensor detecting an angular velocity based on a pitching motion;said yawing angular sensor detecting an inclination angle based on said yawing motion; andsaid pitching angular sensor detecting an inclination angle based on said pitching motion.

10. The anti-shake apparatus according to claim 9, wherein said angular velocity sensor has a rolling angular velocity sensor that detects an angular velocity based on a rolling motion, and said angular displacement sensor has at least one of said yawing angular sensor, said pitching angular sensor and a rolling angular sensor that detects an inclination angle based on said rolling motion.

11. A photographing apparatus comprising: a hand-shake quantity detector that has a first detector having an angular velocity sensor and that has a second detector having an angular displacement sensor; anda controller that performs an anti-shake operation based on a first angular signal from said first detector and a second angular signal from said second detector.

12. The photographing apparatus according to claim 11, further comprising an operating unit;wherein said first detector has an integrated unit and a high-pass filter unit that removes a low-frequency element of a signal output from said angular velocity sensor to obtain a high-frequency signal that has had said low-frequency element removed, and said second detector has a hold unit and a low-pass filter unit that removes a high-frequency element of a signal output from said angular displacement sensor to obtain a low-frequency signal that has had said high-frequency element removed;said integrated unit integrating said high-frequency signal and generating said first angular signal based on the integrated high-frequency signal; andsaid hold unit holding an output value output from said low-pass filter unit based on said low-frequency signal at an anti-shake operation base time and outputting said second angular signal based on a differential between the held value by said hold unit and an output value output from said low-pass filter unit based on said low-frequency signal at a time after said anti-shake operation base time; andsaid anti-shake operation base time being set corresponding to an operation of said operation unit.

13. The photographing apparatus according to claim 12, said operation unit is a release button, and said anti-shake operation base time is a time when a control of exposure is started corresponding to said operation of said release button.