Dual camera module and optical instrument

Patent metadata

Field	Value
Publication number	US-12242131-B2
Application number	US-202217937232-A
Country	US
Kind code	B2
Filing date	Sep 30, 2022
Priority date	Jul 29, 2016
Publication date	Mar 4, 2025
Grant date	Mar 4, 2025

Abstract

The present embodiment relates to a dual camera module, in which a first lens driving device is spaced apart from and arranged in parallel with a second lens driving device, a first Hall sensor of the first lens driving device is disposed is disposed at a corner portion which is spaced most apart from a second sensing magnet of the second lens driving device, among a plurality of corner portions of a first housing; and a second Hall sensor of the second lens driving device is disposed at a corner portion which is spaced most apart from the first Hall sensor, among a plurality of corner portions of a second housing.

First claim

The invention claimed is:

1. A lens driving device comprising:
a first cover member;
a first bobbin disposed in the first cover member;
a first coil disposed on the first bobbin;
a first driving magnet disposed in the first cover member and facing the first coil;
a first sensing magnet disposed on the first bobbin; and
a first Hall sensor configured to detect the first sensing magnet,
wherein the first cover member comprises first and third lateral plates opposite to each other, second and fourth lateral plates opposite to each other, a first corner portion disposed between the first and second lateral plates, a second corner portion disposed between the second and third lateral plates, a third corner portion disposed between the third and fourth lateral plates, and a fourth corner portion disposed between the fourth and first lateral plates,
wherein the first driving magnet comprises a first magnet disposed between the first bobbin and the first lateral plate, a second magnet disposed between the first bobbin and the second lateral plate, a third magnet disposed between the first bobbin and the third lateral plate, and a fourth magnet disposed between the first bobbin and the fourth lateral plate, and
wherein the first sensing magnet and the first Hall sensor are disposed at a position corresponding to the second corner portion.

2. The lens driving device of claim 1 , comprising a first compensation magnet disposed on the first bobbin,
wherein the first compensation magnet is disposed at a position corresponding to the fourth corner portion.

3. The lens driving device of claim 1 , wherein the first magnet is disposed closer to the first corner portion than to the fourth corner portion,
wherein the second magnet is disposed closer to the first corner portion than to the second corner portion,
wherein the third magnet is disposed closer to the third corner portion than to the second corner portion, and
wherein the fourth magnet is disposed closer to the third corner portion than to the fourth corner portion.

4. The lens driving device of claim 1 , wherein the first magnet is not overlapped with the third magnet in a direction from the first lateral plate toward the third lateral plate.

5. The lens driving device of claim 1 , wherein the first magnet is parallel to the first lateral plate.

6. The lens driving device of claim 1 , wherein the first sensing magnet is disposed in the first coil.

7. The lens driving device of claim 1 , comprising:
a first substrate disposed on or in the first cover member; and
a first lower support member coupled to the first bobbin,
wherein the first Hall sensor is disposed on the first substrate, and
wherein the first lower support member electrically connects the first coil and the first substrate.

8. The lens driving device of claim 7 , comprising a first housing disposed between the first cover member and the first bobbin,
wherein the first substrate comprises a body part disposed between the second lateral plate of the first cover member and the first housing.

9. The lens driving device of claim 8 , wherein the first substrate comprises a sensor mounting part bent from the body part, and
wherein the sensor mounting part of the first substrate is disposed in the first housing.

10. The lens driving device of claim 9 , wherein the sensor mounting part and the body part form an obtuse angle.

11. A camera module comprising:
the lens driving device of claim 1 ; and
a second lens driving device,
wherein the second lens driving device comprises:
a second cover member;
a second bobbin disposed in the second cover member;
a second coil disposed on the second bobbin;
a second driving magnet disposed in the second cover member and facing the second coil;
a second sensing magnet on the second bobbin; and
a second Hall sensor detecting the second sensing magnet,

wherein the first cover member is spaced apart from the second cover member, and
wherein a first optical axis of the first lens driving device is parallel to a second optical axis of the second lens driving device.

12. The camera module of claim 11 , wherein the second cover member comprises a fifth lateral plate facing the first lateral plate, a seventh lateral plate opposite to the fifth lateral plate, and sixth and eighth lateral plates opposite to each other, a fifth corner portion disposed between the fifth and sixth lateral plates, a sixth corner portion disposed between the sixth and seventh lateral plates, a seventh corner portion disposed between the seventh and eighth lateral plates, and an eighth corner portion disposed between the eighth and fifth lateral plates, and
wherein the second driving magnet comprises a fifth magnet disposed between the second bobbin and the fifth lateral plate, a sixth magnet disposed between the second bobbin and the sixth lateral plate, a seventh magnet disposed between the second bobbin and the seventh lateral plate, and an eighth magnet disposed between the second bobbin and the eighth lateral plate.

13. The camera module of claim 12 , wherein the fifth magnet is disposed closer to the fifth corner portion than to the eighth corner portion, the sixth magnet is disposed closer to the fifth corner portion than to the sixth corner portion, the seventh magnet is disposed closer to the seventh corner portion than to the sixth corner portion, and the eighth magnet is disposed closer to the seventh corner portion than to the eighth corner portion.

14. The camera module of claim 13 , wherein the second sensing magnet and the second Hall sensor are disposed at a position corresponding to the sixth corner portion.

15. The camera module of claim 12 , wherein the first magnet is not overlapped with the fifth magnet in a direction facing from the first optical axis toward the second optical axis, and
wherein the first magnet is overlapped with the seventh magnet in the direction facing from the first optical axis toward the second optical axis.

16. An optical instrument, comprising:
a main body;
the camera module of claim 11 disposed on the main body to photograph an image of a subject; and
a display configured to display the image photographed by the camera module.

17. A lens driving device comprising:
a first cover member;
a first bobbin disposed in the first cover member;
a first coil disposed on the first bobbin;
a first driving magnet disposed in the cover member and facing the first coil;
a first sensing magnet disposed on the first bobbin;
a first Hall sensor configured to detect the first sensing magnet; and
a first compensation magnet disposed on the first bobbin,
wherein the first cover member comprises first and third lateral plates opposite to each other, second and fourth lateral plates opposite to each other, a first corner portion disposed between the first and second lateral plates, a second corner portion disposed between the second and third lateral plates, a third corner portion disposed between the third and fourth lateral plates, and a fourth corner portion disposed between the fourth and first lateral plates,
wherein the first driving magnet comprises a first magnet disposed between the first bobbin and the first lateral plate, a second magnet disposed between the first bobbin and the second lateral plate, a third magnet disposed between the first bobbin and the third lateral plate, and a fourth magnet disposed between the first bobbin and the fourth lateral plate,
wherein the first compensation magnet is disposed opposite to the first sensing magnet about a first optical axis, a

Assignees

• Lg Innotek Co Ltd

Inventors

• Park Sang Ok
• Min Sang Jun
• Lee Seong Min

Classifications

• H04N23/54 Primary

  Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils · CPC title

• H04N23/45

  for generating image signals from two or more image sensors being of different type or operating in different modes, e.g. with a CMOS sensor for moving images in combination with a charge-coupled device [CCD] for still images · CPC title

• H04N23/90

  Arrangement of cameras or camera modules, e.g. multiple cameras in TV studios or sports stadiums · CPC title

• H04N23/67

  Focus control based on electronic image sensor signals · CPC title

• H04N23/57

  Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices · CPC title