# US 10,122,938 B2 · Lens moving apparatus and camera module and portable terminal including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,122,938 B2 - Document ID: US10122938B2 - Status: Granted - Kind: B2 - Application number: 15/921,202 - Filed: 2018-03-14 - Published: 2018-07-19 - Granted: 2018-11-06 - Earliest claimed: 2015-04-24 - Assignees: LG Innotek Co., Ltd. - Applicants: LG Innotek Co., Ltd. - Inventors: Sang Ok Park - Web page: https://patentgrep.com/patent/US10122938B2 ## CPC - H04N 23/75: by influencing optical camera components - G02B 7/08: adapted to co-operate with a remote control mechanism - 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)} - G03B 3/10: Power-operated focusing - H04N 23/54: Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils - H04N 23/55: Optical parts specially adapted for electronic image sensors; Mounting thereof - H04N 23/57: Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices - G03B 2205/0007: Movement of one or more optical elements for control of motion blur - G03B 2205/0069: using electromagnetic actuators, e.g. voice coils - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - 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 Embodiments provide a lens moving apparatus including a housing supporting a magnet, a bobbin having an outer circumferential surface on which a first coil is disposed, the bobbin moving in the housing in a first direction, upper and lower elastic members each connected to both the housing and the bobbin, and a second coil disposed so as to be spaced apart from the first coil in the first direction, wherein the second coil generates induction voltage resulting from inductive interaction with the first coil when the bobbin moves in the first direction. ## Claims ### Claim 1 A lens moving apparatus comprising: a housing; a bobbin disposed in the housing; a first coil disposed on the bobbin; a magnet disposed on the housing; an upper elastic member connected to an upper portion of the bobbin; a second coil disposed on an outer surface of the housing; and a circuit board disposed on the housing, wherein the bobbin is configured to move in a first direction along an optical axis via an electromagnetic interaction between the first coil and the magnet, wherein an induction voltage is generated at the second coil based on an inductive interaction between the first coil and the second coil when the bobbin moves in the first direction, and wherein the circuit board comprises first and second terminals for receiving the induction voltage. ### Claim 2 (depends on 1) The lens moving apparatus according to claim 1, wherein the second coil is disposed on an outer side surface of the housing and is positioned above the first coil and positioned below the upper elastic member. ### Claim 3 (depends on 1) The lens moving apparatus according to claim 1, wherein the housing comprises four side walls and the second coil is disposed on the four side walls. ### Claim 4 (depends on 1) The lens moving apparatus according to claim 1, wherein the circuit board is disposed on one side wall of four side walls. ### Claim 5 (depends on 1) The lens moving apparatus according to claim 1, wherein the first coil has a first ring shape and the second coil has a second ring shape, and the first ring shape is not overlapped with the second ring shape in a second direction perpendicular to the first direction. ### Claim 6 (depends on 1) The lens moving apparatus according to claim 1, wherein the circuit board further comprises third and fourth terminals for supplying a driving signal to the first coil. ### Claim 7 (depends on 6) The lens moving apparatus according to claim 6, further comprising a lower elastic member connected to a lower portion of the bobbin. ### Claim 8 (depends on 7) The lens moving apparatus according to claim 7, wherein the upper elastic member comprises first and second upper springs, and the lower elastic member comprises first and second lower springs. ### Claim 9 (depends on 8) The lens moving apparatus according to claim 8, wherein each of the first and second upper springs comprises a first inner frame connected to the upper portion of the bobbin, a first outer frame connected to an upper portion of the housing, and a first connection portion connecting the first inner frame and the first outer frame; wherein each of the second lower springs comprises a second inner frame connected to the lower portion of the bobbin, a second outer frame connected to a lower portion of the housing, and a second connection portion connecting the second inner frame and the second outer frame. ### Claim 10 (depends on 9) The lens moving apparatus according to claim 9, wherein one end of the second coil is conductively connected to the first inner frame of the first upper spring, and the other end of the second coil is conductively connected to the first inner frame of the second upper spring. ### Claim 11 (depends on 10) The lens moving apparatus according to claim 10, wherein the first terminal of the circuit board is conductively connected to the first outer frame of the first upper spring, and the second terminal of the circuit board is conductively connected to the first outer frame of the second upper spring. ### Claim 12 (depends on 9) The lens moving apparatus according to claim 9, wherein one end of the first coil is conductively connected to the second inner frame of the first lower spring, and the other end of the first coil is conductively connected to the second inner frame of the second lower spring. ### Claim 13 (depends on 12) The lens moving apparatus according to claim 12, wherein the third terminal of the circuit board is conductively connected to the second outer frame of the first lower spring, and the fourth terminal of the circuit board is conductively connected to the second outer frame of the second lower spring. ### Claim 14 (depends on 1) The lens moving apparatus according to claim 1, wherein the magnet comprises four magnets disposed on the four side walls of the housing. ### Claim 15 (depends on 1) The lens moving apparatus according to claim 1, further comprising a base coupled to the housing. ### Claim 16 (depends on 1) The lens moving apparatus according to claim 1, wherein a driving signal is applied to the first coil and the driving signal comprises a pulse width modulation (PWM) signal and/or a DC signal. ### Claim 17 (depends on 1) The lens moving apparatus according to claim 1, wherein a first distance between a vertical line and the first coil is shorter than a second distance between the vertical line and the second coil, and wherein the vertical line is a line that is parallel to the first direction and extends through a center of the housing. ### Claim 18 (depends on 1) The lens moving apparatus according to claim 1, wherein a distance in the first direction between the first coil and the second coil is configured to vary as the first coil and the bobbin move in the first direction, and the induction voltage is generated based on the distance. ### Claim 19 (depends on 1) A camera module comprising: a lens moving apparatus according to claim 1; a lens barrel coupled to the bobbin; and an image sensor. ### Claim 20 (depends on 19) A phone comprising: a camera module according to claim 19; and a controller, wherein the controller is configured to control a driving signal supplied to the first coil based on the induction voltage induced to the second coil.