Micro electro mechanical systems device and apparatus for compensating tremble

Patent metadata

Field	Value
Publication number	US-9516233-B2
Application number	US-201214367107-A
Country	US
Kind code	B2
Filing date	Nov 7, 2012
Priority date	Dec 19, 2011
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

Disclosed are a micro electro mechanical systems (MEMS) device and an apparatus for compensating for a tremble. The MEMS device includes a substrate; a driven member moving relative to the substrate; an elastic member connected to the driven member and the substrate; a driving member fixed to the substrate for driving the driven member; and a dynamic stopper fixed to the substrate and latched to the driven member.

First claim

The invention claimed is:

1. A MEMS device comprising:
a substrate;
a driven member moving relative to the substrate;
an elastic member connected to the driven member and the substrate;
a driving member fixed to the substrate for driving the driven member;
a dynamic stopper fixed to the substrate and latched to the driven member;
an insulation layer coated on an entire surface of the dynamic stopper;
wherein the driven member comprises a latch groove,
wherein the dynamic stopper is inserted into the latch groove to fix the driven member, and
wherein the insulation layer is interposed between the dynamic stopper and an inner wall of the latch groove and inserted into the latch groove when the driven member is not being driven by the driving member; and
wherein the dynamic stopper is entirely spaced apart from the inner wall of the latch groove by the insulation layer.

2. The MEMS device of claim 1 , wherein the dynamic stopper comprises:
a fixing member fixed to the substrate;
an extension member extending from the fixing member; and
a latch member extending from the extension member while being bent or curved,
wherein the latch member is inserted into the latch groove.

3. The MEMS device of claim 1 , further comprising a stopper driving member facing the extension member for driving the extension member,
an image sensor included in the driven member; and
a lens member facing the image sensor.

4. The MEMS device of claim 2 , wherein the driven member is disposed on the substrate, the extension member extends along a side surface of the driven member, and the latch groove is formed on the side surface of the driven member.

5. The MEMS device of claim 3 , wherein the driving member comprises a driving electrode for driving the driven member, and the driving electrode is operated together with the stopper driving member.

6. An apparatus for compensating for a tremble, the apparatus comprising:
a fixed substrate;
a driven member moving relative to the fixed substrate;
an optical device included in the driven member;
a driving member fixed to the fixed substrate for driving the driven member;
a dynamic stopper fixed to the fixed substrate and latched to the driven member;
a first insulation layer coated on an entire surface of the dynamic stopper;
wherein the driven member comprises a latch groove,
wherein the dynamic stopper is inserted into the latch groove to fix the driven member, and
wherein the first insulation layer is interposed between the dynamic stopper and an inner wall of the latch groove and inserted into the latch groove when the driven member is not being driven by the driving member; and
wherein the dynamic stopper is entirely spaced apart from the inner wall of the latch groove by the insulation layer.

7. The apparatus of claim 6 , wherein the optical device comprises an image sensor.

8. The apparatus of claim 7 , wherein the optical device further comprises a lens facing the image sensor.

9. The apparatus of claim 6 , wherein the driving member comprises a plurality of first driving electrodes fixed to the fixed substrate, and the driven member comprises second driving electrodes disposed between the first driving electrodes, respectively.

10. The apparatus of claim 9 , further comprising a second insulation layer disposed between the first driving electrodes and the second driving electrodes.

11. The apparatus of claim 6 , wherein the dynamic stopper comprises a latch member inserted into the latch groove of the driven member, and the apparatus comprises a stopper driving member for allowing the latch member to be unlatched from the driven member when the driven member is driven by the driving member.

12. The apparatus of claim 6 , further comprising an elastic member for connecting the driven member to the fixed substrate.

13. The apparatus of claim 12 , wherein the elastic member is connected to a fixing member disposed on the fixed substrate, and the driven member is fixed to the fixed substrate by the elastic member and the fixing member.

14. The apparatus of claim 6 , wherein the driven member floats over the fixed substrate.

Assignees

• Lg Innotek Co Ltd
• Gwangju Inst Science & Tech

Inventors

• Park Hyun Kyu
• Moon Seung Hwan
• Lee Jong Hyun

Classifications

• H04N23/687 Primary

  by shifting the lens or sensor position · CPC title

• H02N1/002

  Electrostatic motors · CPC title

• G02B27/646

  compensating for small deviations, e.g. due to vibration or shake (movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68) · CPC title

• G02B26/0875

  by means of one or more refracting elements · CPC title

• B81B3/0051 Primary

  For defining the movement, i.e. structures that guide or limit the movement of an element (mechanical arrangements for preventing or damping vibration or shock H01H3/60) · CPC title