公开(公告)号：US20160062076A1

公开(公告)日：2016-03-03

申请号：US14784802

申请日：2014-04-21

Applicant: LG INNOTEK CO. LTD.

Inventor： Yong Jun KO ,  Sang Won SEO ,  Jeong Gi SEO ,  Chul KIM ,  Don Han JUN ,  Wan Seop CHOI

IPC: G02B7/09 ,  B81B7/02 ,  H02N1/00 ,  G02B7/02

CPC classification number: G02B7/09 ,  B81B3/0024 ,  B81B7/02 ,  B81B2201/032 ,  B81B2201/047 ,  B81B2203/0163 ,  B81B2203/053 ,  G02B7/028 ,  G02B7/08 ,  G03B3/10 ,  H02N1/006

Abstract: The disclosure provides a MEMS device including: a fixed substrate having a cavity; a driving unit disposed in the cavity and floating above the fixed substrate; and an elastic unit for physically connecting the fixed substrate with the driving unit and varying the height of the driving unit according to a control current, wherein the elastic unit includes a bimorph driving unit connected to the fixed substrate and bent according to the control current, a spring connected to the driving unit, and a frame connecting the bimorph driving unit to the spring. Therefore, in order to overcome the limitations according to the power consumption and the size-reduction due to a coil and a magnet, the MEMS device drives one lens and thus can reduce the power consumption and the size thereof. Further, the MEMS device applies a thermal scheme which performs an automatic focusing function through vertical operation of a lens by a thermal expansion difference of different materials, thereby simplifying the structure thereof and reducing the cost.

Abstract translation: 本公开提供了一种MEMS器件，包括：具有空腔的固定衬底; 驱动单元，设置在所述空腔中，并且浮置在所述固定基板上; 以及用于将固定基板与驱动单元物理连接并根据控制电流改变驱动单元的高度的弹性单元，其中弹性单元包括连接到固定基板并根据控制电流弯曲的双压电晶片驱动单元， 连接到驱动单元的弹簧和将双压电晶片驱动单元连接到弹簧的框架。 因此，为了克服根据功率消耗和由于线圈和磁体引起的尺寸减小的限制，MEMS器件驱动一个透镜，从而可以降低功耗及其尺寸。 此外，MEMS器件通过不同材料的热膨胀差来应用通过透镜的垂直操作来执行自动聚焦功能的热方案，从而简化其结构并降低成本。