# US 10,768,439 B2 · Lens moving device, camera module and optical apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,768,439 B2 - Document ID: US10768439B2 - Status: Granted - Kind: B2 - Application number: 16/405,511 - Filed: 2019-05-07 - Published: 2019-08-29 - Granted: 2020-09-08 - Earliest claimed: 2014-06-11 - Assignees: LG Innotek Co., Ltd. - Applicants: LG Innotek Co., Ltd. - Inventors: Jin Suk Han; In Jae Yeo; Jae Hong Cho - Web page: https://patentgrep.com/patent/US10768439B2 ## CPC - 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)} - G02B 7/08: adapted to co-operate with a remote control mechanism - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A lens moving device is provided. The lens moving device includes: a bobbin; a first driving unit coupled to the bobbin; a second driving unit configured to move the first driving unit through an electromagnetic interaction with the first driving unit; a sensing magnet disposed on one side of the bobbin; a location detection sensor configured to sense a location of the sensing magnet; and a correction magnet disposed on an opposite side of the bobbin. According to the present disclosure, static tilt and dynamic tilt of the bobbin, to which a lens module is to be coupled, may be enhanced by a sensing magnet and a correction magnet which establish magnetic force equilibrium with each other. ## Claims ### Claim 1 A lens moving device comprising: a bobbin; a holder member disposed at an outer side of the bobbin; a first coil coupled to the bobbin; a driving magnet coupled to the holder member and configured to move the first coil through an electromagnetic interaction with the first coil; a second coil configured to move the driving magnet; a base disposed below the holder member, wherein the second coil is coupled to the base such that the second coil is configured to move the driving magnet through an electromagnetic interaction with the driving magnet, and wherein a printed circuit board with an image sensor is disposed below the base; an elastic member configured to elastically connect the bobbin and the holder member; a support member configured to elastically connect the holder member and the base; a sensing magnet disposed in a sensing magnet reception area formed as a concave groove concavely formed on an outer circumferential surface of the bobbin; a location detection sensor disposed on an upper portion of the holder member and configured to sense a location of the sensing magnet; and a correction magnet disposed on the outer circumferential surface of the bobbin opposite to the sensing magnet reception area of the bobbin; wherein the location detection sensor is disposed in an accommodation portion formed in the holder member whereby a portion of the holder member is recessed, wherein the sensing magnet is disposed on an upper portion of the bobbin, wherein the first coil is arranged below the sensing magnet such that a portion of the bobbin is arranged between the sensing magnet and the first coil, wherein the driving magnet is disposed on a lower portion of the holder member facing the first coil, and wherein the sensing magnet and the correction magnet are disposed above the first coil and are overlapped with the first coil in a first direction parallel to an optical axis. ### Claim 2 (depends on 1) The lens moving device of claim 1, wherein the sensing magnet and the correction magnet are spaced at a distance symmetrical to a center of the bobbin. ### Claim 3 (depends on 1) The lens moving device of claim 1, wherein a center of the bobbin is located on a virtual line connecting the sensing magnet and the correction magnet. ### Claim 4 (depends on 1) The lens moving device of claim 1, wherein the sensing magnet and the correction magnet have a shape and size symmetrical to each other. ### Claim 5 (depends on 1) The lens moving device of claim 1, wherein the first coil and the sensing magnet are disposed as being spaced in a direction corresponding to the first direction, wherein the bobbin is movably supported, by the elastic member, in a direction corresponding to a direction of the optical axis, and wherein the holder member is movably supported, by the support member, in a direction different from the direction of the optical axis. ### Claim 6 (depends on 1) The lens moving device of claim 1, further comprising: a cover member coupled to the base, wherein the bobbin is installed in an internal space of the cover member, and wherein the cover member is formed of a metallic material. ### Claim 7 (depends on 6) The lens moving device of claim 6, wherein the cover member comprises a top plate and four side surfaces extending downwardly from the top plate, and wherein each side surface of the cover member comprises a cutaway portion at a lower section thereof, such that each side surface has a first portion that extends farther downward than a second portion having the cutaway portion. ### Claim 8 (depends on 1) The lens moving device of claim 1, wherein the driving magnet overlaps with the second coil in the first direction parallel to the optical axis direction and overlaps with the first coil in a second direction perpendicular to the optical axis direction. ### Claim 9 (depends on 1) The lens moving device of claim 1, wherein each of the sensing magnet and the correction magnet is disposed at a location corresponding to a respective corner of the holder member. ### Claim 10 (depends on 1) The lens moving device of claim 1, wherein the bobbin comprises a coil groove that the first coil is disposed. ### Claim 11 (depends on 10) The lens moving device of claim 10, wherein the coil groove comprises a first side wall and a second side wall, and wherein the first coil is disposed between the first side wall and the second side wall. ### Claim 12 (depends on 2) The lens moving device of claim 2, wherein the first side wall is disposed between the first coil and the sensing magnet. ### Claim 13 (depends on 11) The lens moving device of claim 11, wherein the coil groove and the concave groove are overlapped in the first direction. ### Claim 14 (depends on 1) The lens moving device of claim 1, wherein the sensing magnet and the correction magnet are disposed as to maintain a magnetic force equilibrium between each other. ### Claim 15 (depends on 1) The lens moving device of claim 1, wherein the elastic member comprises an upper elastic member and a lower elastic member, wherein the upper elastic member elastically connects an upper portion of the bobbin and an upper portion of the holder member, and wherein the lower elastic member elastically connects a lower portion of the bobbin and the lower portion of the holder member. ### Claim 16 A lens moving device comprising: a base; a holder member spaced apart from the base; a bobbin disposed in the holder member; a first coil disposed on the bobbin; a driving magnet disposed on the holder member; a second coil disposed on the base; an elastic member connected to the bobbin and the holder member; a sensing magnet disposed on the bobbin; a location detector sensor disposed at a position corresponding to a position of the sensing magnet; and a correction magnet disposed on the bobbin and opposite to the sensing magnet, wherein the first coil is disposed on a lower portion of the bobbin, and the sensing magnet and the correction magnet are disposed on an upper portion of the bobbin, wherein the second coil is disposed between the holder member and the base, wherein the driving magnet overlaps with the second coil in a first direction parallel to an optical axis direction and overlaps with the first coil in a second direction perpendicular to the optical axis direction, wherein the sensing magnet and the correction magnet are disposed at positions corresponding to respective corner portions of the holder member, and wherein the sensing magnet is disposed above the first coil and is overlapped with the first coil in a first direction parallel to the optical axis direction. ### Claim 17 (depends on 16) The lens moving device of claim 16, comprising: a support member coupled with the holder member to support the holder member with respect to the base, wherein the elastic member elastically connects the bobbin and the holder member. ### Claim 18 (depends on 17) The lens moving device of claim 17, comprising: a cover member coupled to the base, wherein the cover member comprises a top plate and four side surfaces extended from the top plate, and wherein the bobbin has an octagonal shape comprising four first side surfaces respectively facing each of the four side surfaces of the cover member and four second side surfaces respectively facing each of four corner portions of the cover member. ### Claim 19 (depends on 18) The lens moving device of claim 18, wherein the sensing magnet and the correction magnet are disposed on two of the four second side surfaces of the bobbin. ### Claim 20 (depends on 19) The lens moving device of claim 19, wherein the location detector sensor is disposed at a position corresponding to the corner portion of the cover member.