Anti-shake compensation structure for auto-focus

Abstract

An anti-shake compensation structure is provided. The anti-shake compensation structure includes an auto-focus module driving a lens to move along a light entering path of the lens. The auto-focus module includes a lens holder holding the lens, a coil adjacent to the lens holder, and a magnet corresponding to the coil. The anti-shake compensation structure further includes an outer frame supporting the lens holder, and a compensation driving unit driving the lens to sway relative to the outer frame along a direction not parallel to the light entering path. The compensation driving unit includes a compensation coil corresponding to the magnet.

What is claimed is: 
     
         1 . An anti-shake compensation structure, comprising:
 an auto-focus module, driving a lens to move along a light entering path of the lens, comprising:
 a lens holder, holding the lens; 
 a coil, adjacent to the lens holder; 
 a magnet, corresponding to the coil; 
   an outer frame, supporting the lens holder; and   a compensation driving unit, driving the lens to sway relative to the outer frame along a direction not parallel to the light entering path, wherein the compensation driving unit comprises a compensation coil corresponding to the magnet.   
     
     
         2 . The anti-shake compensation structure of  claim 1 , wherein the anti-shake compensation structure further comprises an elastic supporting member and a base, and the elastic supporting member elastically connects the base to the outer frame. 
     
     
         3 . The anti-shake compensation structure of  claim 2 , wherein the elastic supporting member comprises a pivot portion and the base sways along the direction not parallel to the light entering path about the pivot portion. 
     
     
         4 . The anti-shake compensation structure of  claim 3 , wherein the anti-shake compensation structure further comprises a spring sheet elastically connecting the base to the lens holder. 
     
     
         5 . The anti-shake compensation structure of  claim 1 , wherein the compensation driving unit further comprises a displacement sensor detecting the displacement of the auto-focus module relative to the outer frame, and the displacement sensor and the compensation coil do not overlap in a view of the light entering path. 
     
     
         6 . The anti-shake compensation structure of  claim 5 , wherein the displacement sensor and the coil do not overlap in the view of the light entering path. 
     
     
         7 . The anti-shake compensation structure of  claim 6 , wherein the displacement sensor comprises a magneto-resistive (MR) sensor detecting the displacement of the auto-focus module relative to the outer frame. 
     
     
         8 . The anti-shake compensation structure of  claim 1 , wherein the anti-shake compensation structure further comprises an image sensor, and the image sensor and the lens holder are arranged along the light entering path. 
     
     
         9 . The anti-shake compensation structure of  claim 1 , wherein the compensation driving unit further comprises two compensation coils respectively driving the lens to sway relative to the outer frame along two directions which are not parallel to each other. 
     
     
         10 . The anti-shake compensation structure of  claim 9 , wherein the light entering path and the two directions are perpendicular to each other. 
     
     
         11 . The anti-shake compensation structure of  claim 9 , wherein the auto-focus module further comprises two magnets respectively corresponding to the two compensation coils. 
     
     
         12 . The anti-shake compensation structure of  claim 1 , wherein the coil is arranged around the lens holder. 
     
     
         13 . The anti-shake compensation structure of  claim 1 , wherein the anti-shake compensation structure further comprises an elastic supporting member and a base, and the elastic supporting member elastically connects the base to the outer frame, and the magnet is arranged on the base. 
     
     
         14 . The anti-shake compensation structure of  claim 1 , wherein the compensation coil is arranged on an inner surface of the outer frame. 
     
     
         15 . The anti-shake compensation structure of  claim 1 , wherein the compensation driving unit further comprises a displacement sensor detecting the displacement of the auto-focus module relative to the outer frame, and the displacement sensor is arranged on an inner surface of the outer frame.