Image blurring correction device and imaging device using the same with a high pass filter

An imaging device comprising:

• an angular velocity sensor configured to detect a shaking of a camera body having an imaging unit and to output a blurring signal corresponding to the detected shaking;
• a high-pass filter including a time constant that can be set to a first time constant or a second time constant, which is less than the first time constant, said high-pass filter being configured to receive an input of the blurring signal, to eliminate a direct current component that is included within the blurring signal in accordance with the first time constant, and to output a fluctuation portion of the blurring signal with respect to a reference voltage as an angular velocity signal;
• an analog switch configured to cause a charge that is accumulated within the high-pass filter to discharge according to the second time constant;
• a computation unit configured to receive the angular velocity signal, and to perform a computation to correct a blurring of an image imaged by the imaging unit in accordance with the angular velocity signal;
• a detection unit configured to detect a time when a change of an orientation of the camera body commences and a time when a change of an orientation of the camera body terminates, by detecting a change over time of the angular velocity of the camera body;
• and
• a switching unit configured to switch the time constant of the high-pass filter from the first time constant to the second time constant, and to restore the time constant to the first time constant, by switching the analog switch on or off when the detection unit detects either the time when the change of the orientation of the camera body commences or the time when the change of the orientation of the camera body terminates,
• wherein the switching unit is configured to switch the time constant from the first time constant to the second time constant and to discharge the charge that is accumulated within the high-pass filter, each time the detection unit detects that the change of the orientation of the camera body commences and the change of the orientation of the camera body terminates.

An image blurring correction device comprising:

• an angular velocity sensor configured to detect a shaking of a camera body having an imaging unit and to output a blurring signal corresponding to the detected shaking;
• a high-pass filter including a time constant that can be set to a first time constant or a second time constant, which is less than the first time constant, said high-pass filter being configured to receive an input of the blurring signal, to eliminate a direct current component that is included within the blurring signal in accordance with the first time constant, and to output a fluctuation portion of the blurring signal with respect to a reference voltage as an angular velocity signal;
• an analog switch configured to cause a charge that is accumulated within the high-pass filter to discharge according to the second time constant;
• a computation unit configured to receive the angular velocity signal, and to perform a computation to correct a blurring of an image imaged on the imaging unit in accordance with the angular velocity signal;
• a detection unit configured to detect whether or not an exposure of the image on the imaging unit is performed;
• and
• a switching unit configured to switch the time constant of the high-pass filter between the first time constant and the second time constant by switching the analog switch on or off in accordance with a detection result of the detection unit,
• wherein the switching unit is configured to switch the time constant of the high-pass filter from the first time constant to the second time constant, and to discharge the charge that is accumulated within the high-pass filter, when the detection unit detects that the exposure is not performed.