Patent ID: 9749533
Date: 2017-08-29
CPC Classifications: G02B,H04N

Claim:
1. An image shake correcting device for correcting an image shake by a drive of a correcting unit, the image shake correcting device comprising: a processor that executes a computer program stored in a memory to control the image shake correcting device to function as units comprising: (a) a dividing unit configured to divide a detection signal output by a shake detecting unit into a plurality of frequency components; and (b) a controlling unit configured to (1) detect a speed of panning or tilting, (2) independently change, for each of the plurality of frequency components based on the detected speed, a respective cut-off frequency of a filter calculation or a respective intermediate value calculated by the filter calculation, and (3) combine signals obtained by performing the filter calculation to generate a control signal of the correcting unit, if the panning or the tilting is determined from the detection signal, wherein the dividing unit divides the detection signal into a low frequency component and a high frequency component, and wherein the controlling unit comprises: (a) a determining unit configured to determine the speed of the panning or the tilting; (b) a first low pass filter having a variable converging time constant of the filter calculation while integrating the high frequency component; (c) a second low pass filter having the variable converging time constant of the filter calculation while integrating the low frequency component; and (d) a combining unit configured to add output signals of the first low pass filter and the second low pass filter of which the cut off frequency or the intermediate value is changed by the speed of the panning or the tilting determined by the determining unit, and output the control signal of a target position of the correcting unit.