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US 10,122,938 B2Granted
Lens moving apparatus and camera module and portable terminal including the same
AssigneeLG Innotek Co., Ltd.
InventorSang Ok Park
Life of this patent
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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.
Claims20
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.
8 more elements
Dependencies are inferred from the claim text.