Lens moving apparatus and camera module and optical device including the same
First Claim
Patent Images
1. A lens moving apparatus comprising:
- a housing;
a bobbin disposed in the housing;
a first coil disposed on the bobbin;
a first magnet disposed on the housing;
a second magnet disposed on the housing and spaced apart from the first magnet;
upper and lower elastic members each coupled to both the bobbin and the housing; and
a first position sensor disposed on an outer circumferential surface of the bobbin so as to be spaced apart from the first coil and detecting a magnet field intensity of the first magnet and a magnet field intensity of the second magnet,wherein the first position sensor is disposed in a space between the first magnet and the second magnet when the bobbin is disposed at an initial position.
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Accused Products
Abstract
Embodiments provide a lens moving apparatus including a bobbin including a first coil disposed on an outer circumferential surface thereof, a housing provided with first and second magnets for moving the bobbin by interaction with the first coil, upper and lower elastic members each coupled to both the bobbin and the housing, and a first position sensor for detecting a sum of intensities of magnetic fields of the first and second magnets, wherein the first position sensor is disposed in a space between the first magnet and the second magnet when the bobbin is disposed at an initial position.
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Citations
20 Claims
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1. A lens moving apparatus comprising:
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a housing; a bobbin disposed in the housing; a first coil disposed on the bobbin; a first magnet disposed on the housing; a second magnet disposed on the housing and spaced apart from the first magnet; upper and lower elastic members each coupled to both the bobbin and the housing; and a first position sensor disposed on an outer circumferential surface of the bobbin so as to be spaced apart from the first coil and detecting a magnet field intensity of the first magnet and a magnet field intensity of the second magnet, wherein the first position sensor is disposed in a space between the first magnet and the second magnet when the bobbin is disposed at an initial position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 19, 20)
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15. A lens moving apparatus comprising:
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a housing; a bobbin disposed in the housing; a first coil disposed on the bobbin; a first magnet disposed on the housing; a second magnet disposed on the housing and spaced apart from the first magnet; upper and lower elastic members each coupled to both the bobbin and the housing; and a first position sensor disposed on the bobbin so as to be spaced apart from the first coil and detecting a magnet field intensity of the first magnet and a magnet field intensity of the second magnet, wherein a sum of intensities of magnetic fields detected by the first position sensor is zero or greater while the bobbin moves, and wherein an intensity of a magnetic field of the first magnet, an intensity of a magnetic field of the second magnet, and the sum of intensities of magnetic fields of the first and second magnets detected by the first position sensor have positive values when the bobbin is disposed at a first position, and the first position is a highest position to which the bobbin is moved by interaction between the first coil and the second magnet. - View Dependent Claims (16, 17, 18)
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Specification