Image-shake correcting device for detecting vibration frequency and for changing vibration characteristics
AssigneeCanon Kabushiki Kaisha
InventorsTsuyoshi Morofuji, Akihiro Fujiwara
Life of this patent
Estimating the term…
Abstract
An image-shake correcting device includes a vibration sensor for detecting a vibration of an apparatus, a correcting member for correcting a movement of an image due to a vibration, a first controlling circuit for controlling the correcting member on the basis of an output of the vibration sensor and driving the correcting member in a direction in which the movement of the image is corrected, a detecting circuit for detecting a frequency and an amplitude of the vibration from the output of the vibration sensor, and a second controlling circuit for controlling a characteristic of the first controlling circuit on the basis of an output of the detecting circuit.
Claims59
An image-shake correcting device comprising:
- vibration detecting means for detecting a vibration of an apparatus;
- correcting means for correcting an image shake due to the vibration in accordance with an output of said vibration detecting means;
- frequency detecting means for detecting a frequency of the vibration;
- and
- controlling means for changing frequency characteristics and phase characteristics of said vibration detecting means and/or said correcting means on the basis of an output of said frequency detecting means.
An image-shake correcting device comprising:
- first detecting means for detecting a vibration of an apparatus;
- correcting means for correcting a movement of an image due to the vibration;
- first controlling means for controlling said correcting means on the basis of an output of said first detecting means and driving said correcting means in a direction in which the movement of the image is corrected;
- second detecting means for detecting a frequency and an amplitude of the vibration from the output of said first detecting means;
- and
- second controlling means for controlling frequency and phase characteristics of said first controlling means on the basis of an output of said second detecting means.
An image stabilizing device comprising:
- a filter arranged to pass therethrough only a predetermined high-frequency component of an angular-velocity signal outputted from an angular-velocity detecting element and also arranged to vary its frequency characteristic in response to a first control signal;
- integrating means for integrating the angular-velocity signal passing through said filter and outputting an angle signal, said integrating means being arranged to vary the angle signal on the basis of a time constant set by a second control signal;
- means for eliminating an unnecessary vibration component by controlling phase and frequency characteristics of each of said filter and said integrating means by the first and second control signals;
- signal processing means for performing signal processing of an output of the angular-velocity detecting element and detecting an angular displacement;
- and
- controlling means for determining whether an input of the unnecessary vibration component is complete, on the basis of an output of said signal processing means, and returning, if the input of the unnecessary vibration component is complete, the characteristics of each of said filter and said integrating means to a characteristic corresponding to a normal mode.
An image-shake correcting device comprising:
- vibration detecting means for detecting a vibration of an apparatus;
- correcting means for correcting an image shake due to the vibration in accordance with an output of said vibration detecting means;
- frequency detecting means for detecting a frequency of the vibration;
- and
- controlling means for changing frequency and phase characteristics of said vibration detecting means on the basis of an output of said frequency detecting means.
An image-shake correcting device comprising:
- vibration detecting means for detecting a vibration of an apparatus;
- correcting means for correcting an image shake due to the vibration in accordance with an output of said vibration detecting means;
- frequency detecting means for detecting a frequency of the vibration;
- and
- controlling means for changing frequency and phase characteristics of said vibration detecting means and said correcting means on the basis of an output of said frequency detecting means.
An image-shake correcting apparatus, comprising:
- shake correcting means for detecting a vibration of the apparatus and correcting an image shake due to the vibration;
- detecting means for detecting a frequency of the vibration;
- and
- controlling means for changing frequency and phase characteristics of said shake correcting means on the basis of an output of said detecting means.
An image shake correcting apparatus, comprising:
- shake detecting sensor for detecting a vibration of the apparatus;
- shake correcting system for correcting an image shake due to the vibration;
- detecting circuit for detecting a frequency of the vibration;
- and
- micro-computer for changing frequency and phase characteristics of said shake correcting system.
An image-shake correcting device comprising:
- vibration detecting sensor for detecting a vibration of an apparatus;
- correcting device for correcting an image shake due to the vibration in accordance with an output of said vibration detecting sensor;
- frequency detecting circuit for detecting a frequency of the vibration;
- and
- micro processor changing frequency characteristics and phase characteristics of said vibration detecting sensor and/or said correcting device on the basis of an output of said frequency detecting circuit.
Dependencies are inferred from the claim text.