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US 7,689,107 B2Granted
Anti-shake apparatus
AssigneeHoya Corporation
InventorShigeo Enomoto
Life of this patent
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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.
Claims14
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, said angular displacement sensor comprising an inclination angular sensor that detects an inclination angle of a pendulum, said first detector has an integration unit and a high-pass filter unit that removes a low-frequency component of a signal output from said angular velocity sensor to obtain a high-frequency signal from which said low-frequency component has been removed, and said second detector has a hold unit and a low-pass filter unit that removes a high-frequency component of a signal output from said angular displacement sensor to obtain a low-frequency signal from which said high-frequency component has been removed,
- said integration unit integrating said high-frequency signal and generating a first angular signal based on the integrated high-frequency signal;
- and
- said hold unit holding a value output from said low-pass filter unit based on said low-frequency signal at an anti-shake operation base time and outputting a second angular signal based on a differential between the value held by said hold unit and a value output from said low-pass filter unit based on said low-frequency signal at a time after said anti-shake operation base time,
- wherein a cutoff frequency of said high-pass filter unit and a cutoff frequency of said low-pass filter unit have the same value;
- a controller that performs an anti-shake operation based on said first angular signal from said first detector and said second angular signal from said second detector, 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.
3 more elements
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, said angular displacement sensor comprising an inclination angular sensor that detects an inclination angle of a pendulum, said first detector has an integration unit and a high-pass filter unit that removes a low-frequency component of a signal output from said angular velocity sensor to obtain a high-frequency signal from which said low-frequency component has been removed, and said second detector has a hold unit and a low-pass filter unit that removes a high-frequency component of a signal output from said angular displacement sensor to obtain a low-frequency signal from which said high-frequency component has been removed,
- said integration unit integrating said high-frequency signal and generating a first angular signal based on the integrated high-frequency signal;
- and said hold unit holding a value output from said low-pass filter unit based on said low-frequency signal at an anti-shake operation base time and outputting a second angular signal based on a differential between the value held by said hold unit and a value output from said low-pass filter unit based on said low-frequency signal at a time after said anti-shake operation base time,
- wherein a cutoff frequency of said high-pass filter unit and a cutoff frequency of said low-pass filter unit have the same value;
- a controller that performs an anti-shake operation based on said first angular signal from said first detector and said second angular signal from said second detector 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.
2 more elements
Dependencies are inferred from the claim text.