CAMERA MODULE AND OPTICAL DEVICE INCLUDING LIQUID LENS

• US 20190317251A1
• Filed: 06/27/2019
• Published: 10/17/2019
• Est. Priority Date: 11/02/2017
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: CHOI, YONG BOK
• Granted Patent: US 10,871,599 B2
• Time in Patent Office: Days
• CPC Class Codes: G02B 26/005 based on electrowetting
• 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 3/12 Fluid-filled or evacuated lenses
• CPC Class Codes: G02B 3/14 of variable focal length
• CPC Class Codes: G02B 7/02 for lenses supports for magnifying lenses G02B25/002
• CPC Class Codes: G02B 7/021 for more than one lens
• CPC Class Codes: G02B 7/08 adapted to co-operate with a remote control mechanism
• CPC Class Codes: G03B 13/36 Autofocus systems
• CPC Class Codes: G03B 17/12 with means for supporting objectives, supplementary lenses, filters, masks, or turrets
• CPC Class Codes: G03B 2205/0084 using other types of actuators
• CPC Class Codes: G03B 3/10 Power-operated focusing
• 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 23/57 Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
• CPC Class Codes: H04N 23/6812 based on additional sensors, e.g. acceleration sensors
• CPC Class Codes: H04N 23/687 by shifting the lens or sensor position

Abstract

A camera module according to an embodiment includes a liquid lens unit including a cavity, a conductive liquid and a non-conductive liquid disposed in the cavity, “n” individual electrodes (n being an integer of 2 or more), and a common electrode, an interface being formed between the conductive liquid and the non-conductive liquid, a main board including an element constituting a control circuit for controlling the operation of the liquid lens unit, and a holder coupled to the main board such that the open area of an insertion hole for insertion of the liquid lens unit is disposed along a first side of the main board.

Claims

1. A camera module comprising:

a board having a plurality of circuit elements and an image sensor;

a holder disposed on the board and comprising a side wall having a hole;

a first lens unit disposed in the holder; and

a focus adjustable lens unit disposed in the holder, at least a portion of the focus adjustable lens unit disposed in the hole,

wherein the focus adjustable lens unit is disposed on the first lens unit,

wherein the board comprises a first long side, a second long side opposite the first long side, and a short side connecting the first long side and the second long side, and

wherein the hole is opened toward the first long side of the board.

2. The camera module according to claim 1, comprising:

a second lens unit disposed in the holder,

wherein the focus adjustable lens unit is disposed between the first lens unit and the second lens unit.

3. The camera module according to claim 1,

wherein the hole comprises a first hole and a second hole, and

wherein the second hole faces the first hole in a first direction perpendicular to an optical axis direction.

4. The camera module according to claim 3,

wherein the focus adjustable lens unit is disposed between the first hole and the second hole.

5. The camera module according to claim 3,

wherein the side wall comprises a first side wall and a second side wall disposed opposite to the first side wall,

wherein the first side wall has the first hole, and

wherein the second side wall has the second hole.

6. The camera module according to claim 4, wherein a part of the focus adjustable lens unit is disposed in at least one of the first hole and the second hole.

7. The camera module according to claim 6, wherein a part of the focus adjustable lens unit protrudes outward from the holder through at least one of the first hole and the second hole.

8. The camera module according to claim 1,

wherein the focus adjustable lens unit comprises a first material and a second material different from the first material.

9. The camera module according to claim 8,

wherein the first material comprises water and the second material comprises oil.

10. The camera module according to claim 3, wherein the first hole is opened toward the first long side of the board, and wherein the second hole is opened toward the second long side of the board.

11. The camera module according to claim 5, wherein the focus adjustable lens unit is inserted through the first hole and the second hole, wherein a first portion of the focus adjustable lens unit protrudes out from the first side wall, and wherein a second portion of the focus adjustable lens unit protrudes out from the second side wall.

12. The camera module according to claim 1, wherein the focus adjustable lens unit has a center thickness smaller than a size of the first opening in the holder, in a second direction parallel to the optical axis of the focus adjustable lens unit.

13. The camera module according to claim 1, wherein the circuit elements do not overlap a virtual plane, which passes through the first opening and is parallel to an upper surface of the board, in a second direction parallel to the optical axis of the focus adjustable lens unit.

14. The camera module according to claim 1, wherein the focus adjustable lens unit comprises a focus adjustable lens, and wherein the focus adjustable lens comprises:

a first plate comprising a cavity in which a conductive liquid and a non-conductive liquid are disposed;

an individual electrode disposed on one surface of the first plate; and

a common electrode disposed on another surface of the first plate.

15. The camera module according to claim 8, wherein the focus adjustable lens unit comprises:

a first connection substrate disposed on the focus adjustable lens and configured to electrically connect the common electrode and the board;

a second connection substrate disposed on the focus adjustable lens and configured to electrically connect the individual electrode and the board; and

a first side surface located at the first long side of the board and a second side surface located at the second long side of the board, and

wherein the first connection substrate comprises a first bending portion, which is connected to the common electrode, bends toward the board, and is disposed at a first position corresponding to a center of the first side surface of the focus adjustable lens unit.

16. The camera module according to claim 9, wherein the second connection substrate comprises a second bending portion, which is connected to the individual electrode, bends toward the board, and is disposed at a position corresponding to a center of the second side surface of the focus adjustable lens unit.

17. The camera module according to claim 10, comprising a first pad portion configured to be electrically connected to the first connection substrate, wherein the first pad portion is disposed on the board at a second position corresponding to the center of the first side surface of the focus adjustable lens unit and extends away from the circuit elements.

18. The camera module according to claim 9, comprising an insulation material and a cover covering an upper surface and a side surface of the holder,

wherein the first connection substrate is a metal plate,

wherein the metal plate comprises:

a lower terminal configured to be electrically connected to the board; and

an upper terminal configured to be electrically connected to the focus adjustable lens, and

wherein the insulation material is disposed on the metal plate in an area that faces an inner side surface of the cover.

19. A camera module, comprising:

a board having a plurality of circuit elements and an image sensor;

a holder disposed on the board and comprising a side wall having a hole;

a first lens unit disposed in the holder; and

a focus adjustable lens unit disposed on the first lens unit,

wherein the focus adjustable lens unit is inserted through the hole and overlapped with the hole in a direction perpendicular to an optical axis.

wherein the board comprises a first long side, a second long side opposite the first long side, and a short side connecting the first long side and the second long side, and

wherein the hole is opened toward the first long side of the board.

20. A camera module, comprising:

a board having a plurality of circuit elements and an image sensor;

a holder disposed on the board and comprising a side wall having a hole;

a first lens unit disposed in the holder;

a second lens unit disposed in the holder;

an interface variable lens disposed between the first lens unit and the second lens unit; and

a board disposed under the holder, a plurality of circuit elements and an image sensor being disposed on the board,

wherein the interface variable lens comprises a first material, a second material on the first material and an interface between the first material and the second material,

wherein a part of the interface variable lens is disposed in the hole, and

wherein the board comprises a first long side, a second long side opposite the first long side, and a short side connecting the first long side and the second long side, and

wherein the hole is opened toward the first long side of the board.