Lens driving apparatus, and camera module and optical device comprising same
AssigneeLG Innotek Co., Ltd.
InventorsSang Ok Park, Byung Wook Son, Seong Min Lee, Jun Taek Lee, Kap Jin Lee
Life of this patent
Estimating the term…
Abstract
An embodiment comprises: a housing; a bobbin for mounting a lens, the bobbin being accommodated inside the housing; a first coil disposed on an outer circumferential surface of the bobbin; a magnet disposed in the housing; and a second coil disposed in the housing, wherein the second coil comprises a third coil and a fourth coil, a first signal is applied to the first coil, a second signal is applied to the fourth coil, and an induction voltage is generated in the second coil by a mutual induction operation between the first coil and the second coil.
Claims20
A lens driving apparatus comprising:
- a housing;
- a bobbin accommodated in the housing, the bobbin being equipped with a lens;
- a first coil disposed on an outer circumferential surface of the bobbin;
- a magnet disposed in the housing;
- a second coil disposed in the housing;
- and
- a circuit board electrically connected to the second coil,
- wherein the second coil comprises a third coil and a fourth coil,
- wherein the first coil receives a first signal and the fourth coil receives a second signal,
- wherein induced voltage is generated at the second coil by mutual induction with the first coil, and
- wherein the circuit hoard comprises a terminal for outputting the induced voltage of the second coil.
Dependencies are inferred from the claim text.