# US 11,994,741 B2 · Lens driving device and camera module including same

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- Number: US 11,994,741 B2
- Document ID: US11994741B2
- Status: Granted
- Kind: B2
- Application number: 17/044,200
- Filed: 2019-04-12
- Published: 2021-04-01
- Granted: 2024-05-28
- Earliest claimed: 2018-04-12
- Assignees: LG Innotek Co., Ltd.
- Applicants: LG Innotek Co., Ltd.
- Inventors: Hyun Ho Choi
- Web page: https://patentgrep.com/patent/US11994741B2

## CPC

- G02B 7/09: adapted for automatic focusing or varying magnification
- G03B 5/00: Adjustment of optical system relative to image or object surface other than for focusing
- G03B 5/04: Vertical adjustment of lens; Rising fronts
- G03B 30/00: Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
- G03B 2205/0046: Movement of one or more optical elements for zooming
- G03B 2205/0069: using electromagnetic actuators, e.g. voice coils
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)

## Abstract

One embodiment relates to a lens driving device and a camera module including same. The lens driving device according to the one embodiment can include: a base; a pin coupled to the base; and a housing including a lens group and moving in the optical axis direction along the pin. The housing can include, in one side thereof, a ball accommodation part and a plurality of balls arranged in the ball accommodation part. The pin is arranged in the ball accommodation part so as to be capable of guiding the housing while being in contact with the plurality of balls.

## Claims

### Claim 1

A lens driving device comprising:
a base;
a plurality of pins coupled to the base; and
a housing including a lens group and configured to move in an optical axis direction along the pins,
wherein the housing comprises a ball accommodation part and a plurality of balls disposed inside the ball accommodation part and surrounding a first pin of the pins,
wherein the first pin is disposed in the ball accommodation part to guide the housing while contacting the plurality of balls,
wherein the housing comprises a first housing including a first lens housing in which a first lens group is accommodated, and a first driver housing including a magnet and the ball accommodation part,
wherein the first housing includes a first protrusion extending from the first lens housing in a direction perpendicular to the optical axis direction, and a first guide groove provided in the first protrusion,
wherein the pins include a second pin disposed in the first guide groove to guide the movement of the first lens assembly,
wherein the base includes a first recess corresponding to a shape of the second pin,
wherein the lens driving device comprises a first driving part disposed below the first housing,
wherein the first driving part includes a first yoke and a first coil part disposed on the first yoke, and
wherein the first driving part is disposed between the first pin and the second pin.

### Claim 2 (depends on 1)

The lens driving device according to claim 1, wherein there is attractive force between the first yoke and the magnet.

### Claim 3 (depends on 1)

The lens driving device according to claim 1, wherein the ball accommodation part includes a predetermined first ball accommodation hole and the balls are disposed in the first ball accommodation hole.

### Claim 4 (depends on 3)

The lens driving device according to claim 3, wherein the balls include a first ball, a second ball, and a third ball disposed in the first ball accommodation hole.

### Claim 5 (depends on 1)

The lens driving device according to claim 1, wherein the first pin is a cylindrical pin having a circular cross-sectional shape.

### Claim 6 (depends on 5)

The lens driving device according to claim 5, wherein the plurality of balls comprises three balls disposed around and in direct contact with a circumference of the circular cross-sectional shape of the first pin.

### Claim 7 (depends on 5)

The lens driving device according to claim 5, wherein the ball accommodation part comprises a plurality of ball guide rails between the plurality of balls.

### Claim 8 (depends on 7)

The lens driving device according to claim 7, wherein a ball guide groove is disposed between the ball guide rails.

### Claim 9 (depends on 8)

The lens driving device according to claim 8, wherein the ball guide groove has an open area in a direction of the first pin, and a third gap of the open area is smaller than a diameter of one of the balls.