# US 2013/0156411 A1 · Optical image stabilizer and image capturing device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0156411 A1 - Document ID: US20130156411A1 - Status: Published application - Kind: A1 - Application number: 13/452,928 - Filed: 2012-04-22 - Published: 2013-06-20 - Earliest claimed: 2011-12-15 - Assignees: Asia Optical Co., Inc. - Inventors: Ya-Ling Wang - Web page: https://patentgrep.com/patent/US20130156411A1 ## CPC - G03B 5/00: Adjustment of optical system relative to image or object surface other than for focusing - 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)} - H04N 23/6812: {based on additional sensors, e.g. acceleration sensors} - H04N 23/685: {performed by mechanical compensation} - G03B 2217/005: Blur detection - 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) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract An optical image stabilizer includes a magnetic element, a moving platform, at least one first sensor and at least one second sensor. The magnetic element is fixed on a main body. The moving platform is movably disposed on the main body. The first and the second sensors are fixed on the moving platform. When the moving platform moves relatively to the main body, the first sensor senses a variation of a magnetic force applied to the first sensor by the magnetic element for calculating a displacement of the moving platform along a first direction, and the second sensor senses a variation of a magnetic force applied to the second sensor by the magnetic element for calculating a displacement of the moving platform along a second direction. The first direction is perpendicular to the second direction. In addition, an image capturing device having the optical image stabilizer is also provided. ## Claims ### Claim 1 An optical image stabilizer, adapted to be used in an image capturing device, comprising: a magnetic element, fixed on a main body of the image capturing device; a moving platform, movably disposed on the main body, wherein a region of the moving platform is aligned to the magnetic element; at least a first sensor, fixed on the region, wherein when the moving platform moves relatively to the main body, the first sensor senses a variation of a magnetic force applied to the first sensor by the magnetic element for calculating a displacement of the moving platform along a first direction; and at least a second sensor, fixed on the region, wherein when the moving platform moves relatively to the main body, the second sensor senses a variation of a magnetic force applied to the second sensor by the magnetic element for calculating a displacement of the moving platform along a second direction, wherein the first direction is perpendicular to the second direction. ### Claim 2 (depends on 1) The optical image stabilizer of claim 1, wherein the image capturing device comprises: a control circuit, disposed on the main body and electronically connected to the moving platform; and a vibration sensor, disposed on the main body and electronically connected to the control circuit, wherein the vibration sensor is configured to sense a vibration value of the main body, and the control circuit is configured to drive the moving platform to move relatively to the main body for compensating the vibration value. ### Claim 3 (depends on 2) The optical image stabilizer of claim 2, wherein the first sensor and the second sensor are electronically connected to the control circuit, and when the displacement of the moving platform along the first direction and the displacement of the moving platform along the second direction are enough to compensate the vibration value, the control circuit stops driving the moving platform. ### Claim 4 (depends on 1) The optical image stabilizer of claim 1, wherein the number of the at least one first sensors is two and the first sensors are arranged along a first axis, the first axis is parallel to the first direction, and the two first sensors are spaced by a distance. ### Claim 5 (depends on 4) The optical image stabilizer of claim 4, wherein the number of the at least one second sensors is two and the second sensors are arranged along a second axis, the second axis is parallel to the second direction, and the two second sensors are spaced by a distance. ### Claim 6 (depends on 5) The optical image stabilizer of claim 5, wherein the two first sensors and the two second sensors surround an intersection of the first axis and the second axis. ### Claim 7 An image capturing device, comprising: a main body; and an optical image stabilizer, comprising: a magnetic element, fixed on the main body; a moving platform, movably disposed on the main body, wherein a region of the moving platform is aligned to the magnetic element; at least a first sensor, fixed on the region, wherein when the moving platform moves relatively to the main body, the first sensor senses a variation of a magnetic force applied to the first sensor by the magnetic element for calculating a displacement of the moving platform along a first direction; and at least a second sensor, fixed on the region, wherein when the moving platform moves relatively to the main body, the second sensor senses a variation of a magnetic force applied to the second sensor by the magnetic element for calculating a displacement of the moving platform along a second direction, wherein the first direction is perpendicular to the second direction. ### Claim 8 (depends on 7) The image capturing device as claimed in claim 7, further comprising: a control circuit, disposed on the main body and electronically connected to the moving platform; and a vibration sensor, disposed on the main body and electronically connected to the control circuit, wherein the vibration sensor is configured to sense a vibration value of the main body, and the control circuit is configured to drive the moving platform to move relatively to the main body for compensating the vibration value. ### Claim 9 (depends on 8) The image capturing device of claim 8, wherein the first sensor and the second sensor are electronically connected to the control circuit, and when the displacement of the moving platform along the first direction and the displacement of the moving platform along the second direction are enough to compensate the vibration value, the control circuit stops driving the moving platform. ### Claim 10 (depends on 7) The image capturing device of claim 7, wherein the number of the at least one first sensors is two and the first sensors are arranged along a first axis, the number of the at least one second sensors is two and the second sensors are arranged along a second axis, the first axis is parallel to the first direction, the second axis is parallel to the second direction, the two first sensors are spaced by a distance, and the two second sensors are spaced by a distance.