Patent ID: 7224893

Claim:
An anti-shake apparatus of a photographing apparatus, comprising: a movable unit that has one of an imaging device and a hand-shake correcting lens, and that can be moved in first and second directions, said first direction being perpendicular to an optical axis of a camera lens of said photographing apparatus, and said second direction being perpendicular to said optical axis and said first direction; a fixed unit that slidably supports said movable unit in both said first and second directions; a signal-processing unit; and a control unit that controls said movable unit, said fixed unit, and said signal-processing unit, and that has first and second AID converters; one of said movable unit and said fixed unit having a magnetic-field change-detecting unit which has a horizontal magnetic-field change-detecting element for detecting a position of said movable unit in said first direction as a first location, and a vertical magnetic-field change-detecting element for detecting a position of said movable unit in said second direction as a second location; another of said movable unit and said fixed unit having a position-detecting magnet unit which is used for detecting said first and second locations, and which faces said magnetic-field change-detecting unit; said signal-processing unit outputting a first detected-position signal which specifies said first location on the basis of output signals of said horizontal magnetic-field change-detecting element, to said first A/D converter, and outputting a second detected-position signal which specifies said second location on the basis of output signals of said vertical magnetic-field change-detecting element, to said second A/D converter; said control unit calculating said first location on the basis of an A/D converting operation by said first A/D converter, for said first detected-position signal, and calculating said second location on the basis of an A/D converting operation by said second A/D converter, for said second detected-position signal, and performing an adjusting operation which maximizes a width between minimum and maximum values of said first detected-position signal, in a horizontal movement range of said movable unit, and in an A/D converting range of said first A/D converter, and which maximizes a width between minimum and maximum values of said second detected-position signal, in a vertical movement range of said movable unit, and in an A/D converting range of said second A/D converter; said horizontal movement range being proportional to a focal distance of said camera lens; and said vertical movement range being proportional to said focal distance.