Stage with built-in damping

• US 8,238,739 B1
• Filed: 08/02/2010
• Issued: 08/07/2012
• Est. Priority Date: 07/18/2006
• Status: Active Grant

• Current Assignee: DigitalOptics Corporation MEMS (Adeia Inc.)
• Original Assignee: Digital Optics Corporation East*
• Inventors: Gutierrez, Roman C.
• Primary Examiner(s): Laballe, Clayton E
• Assistant Examiner(s): ADAMS, BRET W
• Application Number:
  US12/848,804
• Time in Patent Office: 736 Days
• Field of Search: 396/88, 396/133
• US Class Current: 396/133
• CPC Class Codes: G02B 27/646 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 Class Codes: G02B 7/08 adapted to co-operate with a remote control mechanism
• CPC Class Codes: G03B 3/10 Power-operated focusing
• CPC Class Codes: H04N 23/55 Optical parts specially adapted for electronic image sensors; Mounting thereof
• CPC Class Codes: H04N 23/60 Control of cameras or camera modules
• CPC Class Codes: H04N 23/68 for stable pick-up of the scene, e.g. compensating for camera body vibrations
• CPC Class Codes: H04N 23/687 by shifting the lens or sensor position

Abstract

A positioning system for a miniature electronic device. The positioning system has a first portion including a damper and a second portion connected to the first portion. The second portion positions a payload of the miniature electronic device. The miniature electronic device may be a miniature camera, or other device.

Claims

1. A system for positioning a payload within a miniature electronic device, comprising:

a generally planar first stage having a damper coupled thereto for damping movement of the first stage;

a generally planar second stage coupled to the payload and having an opening therein;

a generally planar support frame having an opening therein, the second stage being supported within the opening of and generally coplanar with the support frame;

an actuator coupled to at least one of the first and second stages; and

,

a controller in communication with the actuator, the controller being configured to generate an excitation waveform corresponding to a desired position of the payload within the electronic device.

2. The system of claim 1, further comprising an actuator in communication with at least one of the first stage and the second stage.

3. The system of claim 2, further comprising a controller in communication with the actuator, the controller configured to generate the excitation waveform corresponding to the desired position of the payload.

4. The system of claim 1, wherein the first stage is nested in the second stage.

5. The system of claim 1, wherein the first stage has at least one resonant frequency including a first resonant frequency and wherein the second stage has at least one resonant frequency including a second resonant frequency that is substantially the same as the first resonant frequency.

6. The system of claim 1, wherein the first stage has at least one resonant frequency including a first resonant frequency and wherein the second stage has at least one resonant frequency including a second resonant frequency that is different from the first resonant frequency.

7. The system of claim 6, wherein one of the second resonant frequency and the first resonant frequency is an integer multiple of the other of the second resonant frequency and the first resonant frequency.

8. The system of claim 1, wherein the first stage is connected to the second stage using one or more flexures.

9. The system of claim 8, further comprising a frame, and wherein the second stage is connected to the frame using at least one flexure.

10. A mobile electronic device comprising:

a support frame having an opening therein; and

,

a positioning system configured to position a moveable portion of the mobile electronic device to a selected position with respect to the support frame, the positioning system comprising;

a first stage having a damper coupled thereto for damping movement of the first stage; and

,

a second stage coupled to the moveable portion of the device and having an opening therein, the second stage being supported within the opening of the support frame by a second plurality of flexures.

11. The device of claim 10, further comprising an actuator in communication with at least one of the first stage and the second stage.

12. The device of claim 11, further comprising a controller in communication with the actuator, the controller configured to generate an excitation waveform indicative of a desired position of the movable portion with respect to the frame.

13. The device of claim 10, wherein the first stage is nested in the second stage.

14. The device of claim 10, wherein the first stage has at least one resonant frequency including a first resonant frequency and wherein the second stage has at least one resonant frequency including a second resonant frequency that is substantially the same as the first resonant frequency.

15. The device of claim 10, wherein the first stage has at least one resonant frequency including a first resonant frequency and wherein the second stage has at least one resonant frequency including a second resonant frequency that is different from the first resonant frequency.

16. The device of claim 15, wherein one of the second resonant frequency and the first resonant frequency is an integer multiple of the other of the second resonant frequency and the first resonant frequency.

17. The device of claim 10, wherein the device comprises a miniature camera.

18. The device of claim 10, wherein the device comprises at least one of a personal data assistant, a cell phone, and a security device.

19. A positioning system for a miniature camera comprising:

a first positioning means including a means for damping motion of the first positioning means; and

a second separate positioning means connected to the first positioning means, the second positioning means configured to position a movable portion of the miniature camera.

20. The system of claim 19, further comprising an actuating means for applying force to at least one of the first positioning means and the second positioning means.

21. The system of claim 20, further comprising a controlling means in communication with the actuating means, the controlling means for generating an excitation waveform corresponding to a of a desired position of the movable portion for controlling the actuating means.

22. The system of claim 19, further comprising means for flexibly connecting the first positioning means to the second positioning means.