Driving structure for use in optical actuator, corresponding photographing module, and assembly method

A driving structure for an optical actuator, comprising:

• a first driving part arranged for mounting a lens and driving the lens to translate in the directions of the x-axis and the y-axis, wherein the x-axis and y-axis are orthogonal to an optical axis of the lens;
• and
• a second driving part which is arranged for driving a photosensitive chip to translate in the x-axis and y-axis directions;
• wherein the lens and the photosensitive chip are configured to be driven simultaneously and move in opposite directions, wherein based on a detected tilt shaking angle a of a camera module, a lens movement distance of the lens which is driven by said first driving part is determined as b, and a movement distance of the photosensitive chip driven by said second driving part is determined as c, wherein the movement distance b of the lens, the movement distance c of the photosensitive chip, and an image focal length f of the camera module satisfy the following equation:
• a=arctan (b/f)+arctan (c/f), wherein said driving structure further comprises a driving logic module which is used to keep a ratio between the movement distance b of the lens and the movement distance c of the photosensitive chip remain at a preset fixed ratio.

A camera module, comprising:

• a lens;
• a photosensitive assembly;
• and
• a driving structure for an optical actuator comprising a first driving part which is arranged for mounting a lens and driving the lens to translate in the directions of the x-axis and the y-axis and a second driving part which is arranged for driving a photosensitive chip to translate in the x-axis and y-axis directions, wherein the lens and the photosensitive chip are configured to be driven simultaneously and move in opposite directions, wherein the x-axis and y-axis are orthogonal to an optical axis of the lens, wherein said lens is installed on said first driving part, and said photosensitive assembly is installed on said second driving part, wherein said photosensitive assembly comprises a circuit board, and said camera module further comprises a first connecting band and a second connecting band, and said first connecting band is arranged on a top area of said first driving part and is electrically connected to said first driving part, and said second connecting band is connected and conducted with said circuit board of said photosensitive assembly, wherein said second connecting band is provided with multiple bends to form a curved stacked shape.

A camera module, comprising:

• a lens;
• a photosensitive assembly;
• and
• a driving structure for an optical actuator comprising a first driving part which is arranged for mounting a lens and driving the lens to translate in the directions of the x-axis and the y-axis and a second driving part which is arranged for driving a photosensitive chip to translate in the x-axis and y-axis directions, wherein the lens and the photosensitive chip are configured to be driven simultaneously and move in opposite directions, wherein the x-axis and y-axis are orthogonal to an optical axis of the lens, wherein said lens is installed on said first driving part, and said photosensitive assembly is installed on said second driving part, wherein said first driving part comprises a first base portion and a first movable portion, and said second driving part comprises a second base portion and a second movable portion, wherein said second base portion is fixed with said first base portion, said second movable portion is located below said second base portion and is movably connected with said second base portion, and said photosensitive assembly is located below said second movable portion and fixed to said second movable portion;
• wherein said photosensitive assembly comprises a suspended circuit board which comprises a rigid main body of said circuit board and flexible connecting bands, and said connecting bands are extended from a first side and a second side of said circuit board body and bent upward to form bent parts, and a top of said bent part extends along a periphery of said photosensitive assembly in a horizontal direction, so that said connecting bands surround the first side, the second side and the third side of the photosensitive assembly, wherein each of said connecting bands located on the first side, the second side and the third side comprises at least one suspending portion which is fixed to said second base portion of said second driving part, or is fixed to said second base portion through an intermediary, wherein said photosensitive assembly has a first side and a second side consistent with the position of said main body of said circuit board, and the first side and the second side are arranged oppositely, and the third side intersects both the first side and the second side.