Image photographing device having function for compensating for hand vibration

• US 20120082442A1
• Filed: 02/25/2011
• Published: 04/05/2012
• Est. Priority Date: 10/04/2010
• Status: Active Grant

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kwon, Oh Byoung, Kim, Sung Hoon, Oh, Sang Hwan
• Granted Patent: US 8,594,493 B2
• Time in Patent Office: Days
• US Class Current: 396/55
• 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: H04N 23/54 Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
• CPC Class Codes: H04N 23/55 Optical parts specially adapted for electronic image sensors; Mounting thereof
• CPC Class Codes: H04N 23/687 by shifting the lens or sensor position

Abstract

Disclosed herein is an image photographing device having a function for compensating hand vibration to simultaneously perform auto focusing and hand vibration compensation. The image photographing device having a function for compensating hand vibration includes: a bobbin having a lens unit mounted therein, a driving coil in a Z axis direction wound on an outer peripheral surface thereof, and a driving coil in an X axis direction and a driving coil in a Y axis direction mounted outside the driving coil in a Z direction; a plurality of magnets mounted outside the driving coil in an X axis direction and the driving coil in a Y axis direction; an elastic member elastically combined with an upper portion and a lower portion of the bobbin; a housing into which the bobbin combined with the magnet and the elastic member is inserted; and a shield case combined with an upper portion of the housing.

Claims

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

a bobbin having a lens unit mounted therein, a driving coil in a Z axis direction wound on an outer peripheral surface thereof, and driving coils in an X axis direction and a Y axis direction mounted outside the driving coil in a Z direction;

a plurality of magnets mounted outside the driving coils in an X axis direction and a Y axis direction;

an elastic member elastically combined with an upper portion and a lower portion of the bobbin;

a housing into which the bobbin combined with the magnet and the elastic member is inserted; and

a shield case combined with an upper portion of the housing.

2. The image photographing device having a function for compensating for hand vibration according to claim 1, wherein the lens unit has at least one lens stacked inside a cylindrical lens barrel.

3. The image photographing device having a function for compensating for hand vibration according to claim 1, wherein a lower portion of the housing is mounted with a substrate of which a center is mounted with an image sensor.

4. The image photographing device having a function for compensating for hand vibration according to claim 1, wherein the driving coil in a Z axis direction is wound over the whole peripheral surface between an upper plate and a lower plate of the bobbin in a counterclockwise direction.

5. The image photographing device having a function for compensating for hand vibration according to claim 1, wherein the bobbin is formed in a polygonal shape, and the driving coils in an X axis direction are disposed on one opposite side of the bobbin and the driving coils in a Y axis direction are disposed on another opposite side thereof.

6. The image photographing device having a function for compensating for hand vibration according to claim 1, wherein Fleming'"'"'s left hand rule is applied to the driving coil in a Z axis direction and the driving coil in an X axis direction and the driving coil in a Y axis direction through the magnet disposed on four sides of the bobbin when current is applied to the coils to generate an electromagnetic force in an X axis direction and a Y axis direction, respectively.

7. The image photographing device having a function for compensating for hand vibration according to claim 5, wherein a pair of driving coils in an X axis direction and a pair of driving coils in a Y axis direction are disposed in parallel at predetermined intervals on each side of the bobbin.

8. The image photographing device having a function for compensating for hand vibration according to claim 7, wherein the pair of driving coils in an X axis direction and the pair of driving coils in a Y axis direction disposed in parallel on one side of the bobbin are wound in opposite direction to each other.

9. The image photographing device having a function for compensating for hand vibration according to claim 8, wherein the driving coil in an X axis direction and the driving coil in a Y axis direction formed at opposite positions in a diagonal direction of the four driving coils disposed on the opposite sides of the bobbin are wound in the same direction.

10. The image photographing device having a function for compensating for hand vibration according to claim 6, wherein the magnet is disposed so that N poles thereof face the four sides of the bobbin on which the driving coil in an X axis direction and the driving coil in a Y axis direction are mounted.

11. The image photographing device having a function for compensating for hand vibration according to claim 10, wherein the magnet is formed with a width exceeding inner winding portions of the pair of driving coils in an X axis direction and the pair of driving coils in a Y axis direction but not exceeding outer winding portions of the pair of driving coils in an X axis direction and the pair of driving coils in a Y axis direction.

12. The image photographing device having a function for compensating for hand vibration according to claim 1, wherein the elastic members have power connectors each extendedly formed on one side thereof, to be electrically connected to the substrate mounted on a lower portion of the housing.

13. The image photographing device having a function for compensating for hand vibration according to claim 12, wherein the elastic members apply current to the driving coil in a Z axis direction and the driving coil in an X axis direction and the driving coil in a Y axis direction wound on the bobbin through springs formed on all sides thereof.