# US 2020/0404181 A1 · Reflection module for optical image stabilization and camera module 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 2020/0404181 A1 - Document ID: US20200404181A1 - Status: Published application - Kind: A1 - Application number: 16/663,761 - Filed: 2019-10-25 - Published: 2020-12-24 - Earliest claimed: 2019-06-18 - Assignees: Samsung Electro-Mechanics Co., Ltd. - Applicants: Samsung Electro-Mechanics Co., Ltd. - Inventors: Hong Joo LEE; Young Bok YOON; Nam Ki PARK; Ta Kyoung LEE; Jung Woo KIM - Web page: https://patentgrep.com/patent/US20200404181A1 ## CPC - H04N 23/687: {by shifting the lens or sensor position} - G01R 33/07: Hall effect devices - G01R 33/072: {Constructional adaptation of the sensor to specific applications} - G02B 7/09: adapted for automatic focusing or varying magnification - G02B 7/10: by relative axial movement of several lenses, e.g. of varifocal objective lens - G02B 7/182: for mirrors - G02B 13/0065: {having a beam-folding prism or mirror} - G02B 13/009: {having zoom function} - 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 5/00: Adjustment of optical system relative to image or object surface other than for focusing - G03B 13/36: Autofocus systems - G03B 17/17: with reflectors arranged in beam forming the photographic image, e.g. for reducing dimensions of camera - 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 - H04N 23/51: Housings - H04N 23/55: Optical parts specially adapted for electronic image sensors; Mounting thereof - H04N 23/69: Control of means for changing angle of the field of view, e.g. optical zoom objectives or electronic zooming - G03B 2205/003: by a prism with variable angle or the like - G03B 2205/0069: using electromagnetic actuators, e.g. voice coils - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - 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 A reflection module for optical image stabilization includes a rotation holder, which includes a reflection member and is supported on an internal wall of a housing, and a driving part to provide driving force to move the rotation holder. The driving part includes a magnet disposed on the rotation holder, a coil disposed in the housing and opposing the magnet, and a hall sensor disposed in the housing and opposing an N pole or an S pole of the magnet. ## Claims ### Claim 1 A reflection module for optical image stabilization, comprising: a rotation holder comprising a reflection member and supported on an internal wall of a housing; and a driving part configured to provide driving force to move the rotation holder, wherein the driving part comprises a magnet disposed on the rotation holder, a coil disposed in the housing and opposing the magnet, and a hall sensor disposed in the housing and opposing an N pole or an S pole of the magnet. ### Claim 2 (depends on 1) The reflection module for optical image stabilization of claim 1, wherein the coil and the hall sensor are mounted on a circuit board, and the circuit board is fixed to the housing. ### Claim 3 (depends on 2) The reflection module for optical image stabilization of claim 2, wherein the hall sensor is disposed outside coil windings of the coil. ### Claim 4 (depends on 1) The reflection module for optical image stabilization of claim 1, wherein the hall sensor does not oppose a neutral zone adjacent to where the N pole and the S pole of the magnet meet. ### Claim 5 (depends on 1) The reflection module for optical image stabilization of claim 1, wherein the hall sensor is disposed on the N pole or the S pole of the magnet at a position in which a greatest absolute value of flux density is sensed. ### Claim 6 (depends on 1) The reflection module for optical image stabilization of claim 1, wherein a center of the hall sensor opposes a center of the N pole of the magnet or a center of the S pole of the magnet. ### Claim 7 (depends on 1) The reflection module for optical image stabilization of claim 1, wherein the hall sensor comprises two hall sensors, respectively disposed outside opposite sides of coil windings of the coil. ### Claim 8 (depends on 1) The reflection module for optical image stabilization of claim 1, wherein the magnet is disposed on a bottom surface of the rotation holder, and the coil is disposed on a bottom surface of the housing. ### Claim 9 (depends on 1) The reflection module for optical image stabilization of claim 1, wherein the hall sensor has a flux density value varying depending on a relative distance from the magnet. ### Claim 10 (depends on 9) The reflection module for optical image stabilization of claim 9, wherein the hall sensor has a greater amount of change in the flux density value when the hall sensor opposes the N pole or the S pole of the magnet than when the hall sensor opposes a neutral zone of the magnet. ### Claim 11 (depends on 1) The reflection module for optical image stabilization of claim 1, wherein the hall sensor has a greater flux density value when the hall sensor opposes the N pole or the S pole of the magnet than when the hall sensor opposes a neutral zone of the magnet. ### Claim 12 (depends on 1) The reflection module for optical image stabilization of claim 1, wherein the rotation holder is configured to rotate such that the reflection member is tilted in a direction perpendicular to an optical axis. ### Claim 13 A camera module comprising: a housing defining an internal space; a reflection module disposed in the internal space and comprising: a rotation holder comprising a reflection member and supported on an internal wall of the housing; and a driving part configured to provide driving force to move the rotation holder; and a lens module comprising a lens barrel including a plurality of lenses, and aligned in an optical axis direction such that reflected light is incident on the reflection member, wherein the driving part comprises a magnet disposed on the rotation holder, a coil disposed in the housing and opposing the magnet, and a hall sensor disposed in the housing and opposing an N pole or an S pole of the magnet, and wherein the lens module is disposed such that the lens barrel is selectively movable along an optical axis. ### Claim 14 (depends on 13) The camera module of claim 13, wherein the hall sensor comprises at least one hall sensor that opposes the N pole of the magnet and at least one hall sensor that opposes the S pole of the magnet. ### Claim 15 (depends on 14) The camera module of claim 14, wherein the hall sensor comprises two hall sensors that oppose the N pole of the magnet and two hall sensors that oppose the S pole of the magnet. ### Claim 16 (depends on 15) The camera module of claim 15, wherein the two hall sensors that oppose the N pole of the magnet are disposed on opposite sides of the coil with respect to the optical axis, and the two hall sensors that oppose the S pole of the magnet are disposed on opposite sides of the coil with respect to the optical axis.