ACTUATOR FOR HOLOGRAPHIC INFORMATION STORING APPARATUS

• US 20090323150A1
• Filed: 02/24/2009
• Published: 12/31/2009
• Est. Priority Date: 06/30/2008
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Kyungwon Ferrite Ind. Co., Ltd., Samsung Electronics Co. Ltd.
• Inventors: Kim, Hong-hee, Kwon, Jae-hwan, Lee, Kyoung-woo, So, Hyoung-jong, Cheong, Young-min
• Granted Patent: US 7,916,371 B2
• Time in Patent Office: Days
• US Class Current: 359/221.2
• CPC Class Codes: G02B 26/0858 the reflecting means being moved or deformed by piezoelectric means

Abstract

An actuator to drive a mirror of a holographic information storing apparatus, the actuator including: piezoelectric cells; support members mounted on the piezoelectric cells; a hinge member mounted on the support member; and a post mounted on the hinge member, to support the mirror. The hinge member includes a bar disposed parallel to a rotation axis of the mirror, and a curved portion that extends from the bar.

Claims

1. An actuator to drive a mirror of a holographic information storing apparatus, the actuator comprising:

piezoelectric cells;

support members respectively mounted on the piezoelectric cells;

a hinge member comprising a bar disposed parallel to a rotation axis of the mirror and a curved portion extending from the bar; and

a post mounted on the hinge member, to support the mirror.

2. The actuator of claim 1, wherein:

the hinge member comprises first plates coupled to the support members, and a second plate to support the post; and

the bar and the curved portion are disposed between the first plates and the second plate.

3. The actuator of claim 1, wherein the curved portion comprises:

a first part disposed parallel to the rotation axis of the mirror; and

a second part disposed perpendicular to rotation axis of the mirror.

4. The actuator of claim 1, wherein the piezoelectric cells are connected to one another at a bottom surface thereof.

5. The actuator of claim 1, further comprising connectors disposed between adjacent ones of the support members.

6. The actuator of claim 2, wherein the support members have grooves to support the first plates.

7. The actuator of claim 1, wherein the hinge member is thinner than the support members.

8. The actuator of claim 1, wherein a space is formed between the support members, to accommodate movements of the hinge member.

9. An actuator to drive a mirror of a holographic information storing apparatus, the actuator comprising:

piezoelectric cells;

a support mounted on the piezoelectric cells;

a hinge mounted on the support, comprising bars disposed parallel to rotation axes of the mirror and curved portions extending from the bars; and

a post mounted between the hinge and the mirror.

10. The actuator of claim 9, wherein the support comprises:

support members that are each mounted on a respective one of the piezoelectric cells; and

connectors to flexibly connect adjacent ones of the support members.

11. The actuator of claim 10, wherein:

the hinge comprises plates that are each connected to a respective one of the bars; and

each support member has a groove to support a respective one of the plates.

12. The actuator of claim 10, wherein each support member has a protrusion that extends from a side thereof, to prevent the mirror from contacting the respective piezoelectric cell.

13. The actuator of claim 10, wherein:

the hinge comprises a central plate connected to the curved portions and the post; and

the support members define a central space to accommodate the central plate.