Image photographing device having function for compensating hand vibration

• US 20120106936A1
• Filed: 09/07/2011
• Published: 05/03/2012
• Est. Priority Date: 11/03/2010
• Status: Active Grant

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: Lee, Jung Seok, Kang, Byung Woo, On, Sang Min, Kang, Seong Ho, Lim, Soo Cheol, Yoon, Young Bok
• Granted Patent: US 8,611,734 B2
• Time in Patent Office: Days
• US Class Current: 396/55
• CPC Class Codes: G03B 2205/0015 by displacing one or more optical elements normal to the optical axis
• CPC Class Codes: G03B 2205/0069 using electromagnetic actuators, e.g. voice coils
• CPC Class Codes: G03B 5/02 Lateral adjustment of lens
• CPC Class Codes: H04N 23/57 Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices

Abstract

Disclosed herein is an image photographing device having a function for compensating hand vibration. The image photographing device having a function for compensating hand vibration includes: an optical unit; a magnet combined with an outer peripheral surface of the optical unit; a housing inserted with the optical unit and the magnet and having coils disposed at a position corresponding to the magnet; suspension wires arranged at four corners of the optical unit, having the upper end portions and the lower end portions each combined with the optical unit and the housing to support the optical unit in a state floated from the bottom surface of the housing, and having a predetermined bending part formed at any point; a flexible printed circuit board surrounding the outer peripheral surface of the housing and applying current to the coils; and a substrate having the image sensor mounted on the top surface thereof and combined with the lower portion of the housing.

Claims

1. An image photographing device having a function for compensating hand vibration, comprising:

an optical unit;

a magnet combined with an outer peripheral surface of the optical unit;

a housing inserted with the optical unit and the magnet and having coils disposed at a position corresponding to the magnet;

suspension wires arranged at four corners of the optical unit, having the upper end portions and the lower end portions each combined with the optical unit and the housing to support the optical unit in a state floated from the bottom surface of the housing, and having a predetermined bending part formed at any point;

a flexible printed circuit board surrounding the outer peripheral surface of the housing and applying current to the coils; and

a substrate having the image sensor mounted on the top surface thereof and combined with the lower portion of the housing.

2. The image photographing device having a function for compensating hand vibration according to claim 1, wherein the optical unit includes a bobbin, a lens barrel mounted in the bobbin, and a driver vertically driving the lens barrel.

3. The image photographing device having a function for compensating hand vibration according to claim 2, wherein the driver performs an automatic focus by vertically driving the lens barrel by using an ultrasonic motor scheme using a piezo, a voice coil motor scheme generating an electromagnetic force using a coil and a magnet, or a scheme using a shape memory alloy.

4. The image photographing device having a function for compensating hand vibration according to claim 1, wherein the flexible printed circuit board is electrically connected to the substrate to transfer power applied through the substrate to the coil mounted in the housing.

5. The image photographing device having a function for compensating hand vibration according to claim 1, further comprising a yoke combined with the magnet mounted at the outside of the optical unit.

6. The image photographing device having a function for compensating hand vibration according to claim 1, further comprising a shield case combined at the outside of the housing.

7. The image photographing device having a function for compensating hand vibration according to claim 1, wherein the suspension wire includes a vertical supporting part whose lower end portion is fixed to the housing, a horizontal supporting part whose one end portion is combined with the optical unit by being bent at a right angle from the upper end portion of the vertical supporting part, and a bending part formed at any point of the vertical supporting part.

8. The image photographing device having a function for compensating hand vibration according to claim 7, wherein the bending part is configured in a spring shape.

9. The image photographing device having a function for compensating hand vibration according to claim 7, wherein the bending part is configured in a shape bent to be protruded in one direction.

10. The image photographing device having a function for compensating hand vibration according to claim 7, wherein the suspension wire is configured in a form in which the horizontal supporting part bent from the upper end portion of the vertical supporting part has a step.

11. An image photographing device having a function for compensating hand vibration, comprising:

an optical unit;

a magnet combined with an outer peripheral surface of the optical unit;

a housing inserted with the optical unit and the magnet and having coils disposed at a position corresponding to the magnet;

suspension wires arranged at four corners of the optical unit and having the upper end portions and the lower end portions each combined with a plate spring mounted in the optical unit and the bottom surface of the housing to support the optical unit in a state floated from the bottom surface of the housing;

a flexible printed circuit board surrounding the outer peripheral surface of the housing and applying current to the coils; and

a substrate having the image sensor mounted on the top surface thereof and combined with the lower portion of the housing.

12. The image photographing device having a function for compensating hand vibration according to claim 11, wherein the optical unit includes a bobbin, a lens barrel mounted in the bobbin, and a driver vertically driving the lens barrel.

13. The image photographing device having a function for compensating hand vibration according to claim 12, wherein the driver performs an automatic focus by vertically driving the lens barrel by using an ultrasonic motor scheme using a piezo, a voice coil motor scheme generating an electromagnetic force using a coil and a magnet, or a scheme using a shape memory alloy.

14. The image photographing device having a function for compensating hand vibration according to claim 11, wherein the flexible printed circuit board is electrically connected to the substrate to transfer power applied through the substrate to the coil mounted in the housing.

15. The image photographing device having a function for compensating hand vibration according to claim 11, further comprising a yoke combined with the magnet mounted at the outside of the optical unit.

16. The image photographing device having a function for compensating hand vibration according to claim 11, further comprising a shield case combined at the outside of the housing.

17. The image photographing device having a function for compensating hand vibration according to claim 11, wherein the plate spring is configured in a rectangular shape or is configured in a rectangular shape in which concave portions are formed at both side portions thereof.

18. An image photographing device having a function for compensating hand vibration, comprising:

an optical unit;

a magnet combined with an outer peripheral surface of the optical unit;

a housing inserted with the optical unit and the magnet and having coils disposed at a position corresponding to the magnet;

suspension wires arranged at four corners of the optical unit and having the upper end portions and the lower end portions each combined with the optical unit and the bottom surface of the housing to mount an elastic member at the outer peripheral surface;

a flexible printed circuit board surrounding the outer peripheral surface of the housing and applying current to the coils; and

a substrate having the image sensor mounted thereon and combined with the lower portion of the housing.

19. The image photographing device having a function for compensating hand vibration according to claim 18, wherein the optical unit includes a bobbin, a lens barrel mounted in the bobbin, and a driver vertically driving the lens barrel.

20. The image photographing device having a function for compensating hand vibration according to claim 19, wherein the driver performs an automatic focus by vertically driving the lens barrel by using an ultrasonic motor scheme using a piezo, a voice coil motor (VCM) scheme generating an electromagnetic force using a coil and a magnet, or a scheme using a shape memory alloy.

21. The image photographing device having a function for compensating hand vibration according to claim 18, wherein the flexible printed circuit board is electrically connected to the substrate to transfer power applied through the substrate to the coil mounted in the housing.

22. The image photographing device having a function for compensating hand vibration according to claim 18, further comprising a yoke combined with the magnet mounted at the outside of the optical unit.

23. The image photographing device having a function for compensating hand vibration according to claim 18, further comprising a shield case combined at the outside of the housing.

24. The image photographing device having a function for compensating hand vibration according to claim 18, wherein the suspension wire includes a vertical supporting part whose lower end portion is fixed to the housing and the upper end portion is combined to penetrate through the optical unit, a horizontal supporting part closely combined with the top surface of the optical unit by being bent at a right angle from the upper end portion of the vertical supporting part, the outer peripheral surface of the vertical supporting part of the suspension wire being mounted with a spring in a coil shape.

25. The image photographing device having a function for compensating hand vibration according to claim 24, wherein the suspension wire is configured so that the spring is combined with the upper end portion of the vertical supporting part combined to penetrate through the optical unit.