Television – Camera – system and detail – Camera image stabilization
Reexamination Certificate
2008-08-22
2011-12-13
Giles, Nicholas (Department: 2622)
Television
Camera, system and detail
Camera image stabilization
C348S208200
Reexamination Certificate
active
08077211
ABSTRACT:
An imaging device includes an angular velocity sensor (11), which outputs a blurring signal, a high-pass filter circuit unit (12), which eliminates a direct current component in accordance with a first time constant, and which outputs a fluctuation portion with respect to a reference voltage as an angular velocity signal, an analog switch ASW (1), which cause a charge that is accumulated within the high-pass filter circuit unit (12) to discharge according to a second time constant, a computation unit (15), which is for performing a computation in order to correct a blurring of an image in accordance with the angular velocity signal, and a detection circuit unit (15D), which, in order to detect a change over time of the angular velocity of the camera body, samples the angular velocity signal on a per fixed time interval basis, obtains a derivative in accordance with a value thus sampled of the angular velocity signal, and detects a change over time in a size of the derivative thus obtained, wherein the time constant of the high-pass filter is switched between the first time constant and the second time constant of the high-pass filter by controlling a switching on or off of the analog switch in accordance with the result of the detection that is performed by the detection circuit unit (15D).
REFERENCES:
patent: 7209165 (2007-04-01), Ishikawa
patent: 7355631 (2008-04-01), Kumaki
patent: 7546027 (2009-06-01), Moriya
patent: 2004/0189815 (2004-09-01), Kumaki
patent: 2007/0154195 (2007-07-01), Irisawa et al.
patent: 2004-215189 (2004-07-01), None
patent: 4058283 (2007-12-01), None
Dickstein & Shapiro LLP
Giles Nicholas
Ricoh & Company, Ltd.
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