Optical image stabilizer with improved magnetic sensitivity,申请号US201414305666-传众专利搜索

Optical image stabilizer with improved magnetic sensitivity

申请公布号：US9423630(B2)

申请号：US201414305666

申请日期：2014.06.16

申请公布日期：2016.08.23

申请人：

TDK TAIWAN CORP.

发明人：Hu Chao-Chang;Wu Fu-Yuan;Huang Shih-Ting;Lin Jyun-Jie;Chen Yi-Ho

分类号：G02B27/64;G02B7/09;G02B7/08;H04N5/232

主分类号：G02B27/64

代理机构：

Bacon & Thomas, PLLC

代理人：Bacon & Thomas, PLLC

地址：Yangmei TW

摘要：A lens driving device that is based on a Voice Coil Actuator (VCA) structure and provides the auto-focusing and optical image stabilization (OIS) functions. These two functions can be realized by a common magnet scheme, or a separate magnet scheme. Also, the present invention provides an improved structure for the lens driving device to enhance the function of OIS thereof. By arranging a magnetic enhancement device below the OIS coils in the lens driving device, the magnetic driving force of the OIS coils and magnetic induction of the Hall sensors, if present, can be enhanced, and the magnetic sensitivity thereof may be also improved.

主权项：1. A lens driving device, comprising: a lens assembly having an optical axis; an auto-focusing (AF) coil disposed around an outer surrounding of said lens assembly with respect to said optical axis; a set of optical image stabilization (OIS) coils disposed on a plane having a normal direction perpendicular to said optical axis; a plurality of magnets arranged above said set of OIS coils in such a way that each of said magnets has a first surface facing said AF coil and a second surface facing said OIS coils; and a magnetic enhancement device disposed under said set of OIS coils.