Lens moving apparatus
AssigneeLG Innotek Co., Ltd.
InventorsSang Ok Park, Byung Wook Son, Kyoung Ho Yoo, Jun Taek Lee
Life of this patent
Estimating the term…
Abstract
Disclosed is a lens moving apparatus. The lens moving apparatus includes a moving unit having at least one lens installed therein and moving by electromagnetic interaction between magnets and coils, elastic members configured to support the moving unit, and position sensors configured to sense change of electromagnetic force emitted from the magnets according to movement of the moving unit and to output an output signal based on a result of sensing, and a primary resonant frequency of frequency response characteristics according to gain of a ratio of the output signal of the position sensors to an input signal applied to the coils is 30 Hz to 200 Hz.
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 and facing the first coil;
- an elastic member comprising an inner frame coupled with the bobbin, an outer frame coupled with the housing, and a frame connection part connecting the inner frame and the outer frame;
- a sensing magnet disposed on the bobbin;
- and
- a first position sensor disposed opposite to the sensing magnet and configured to detect a movement of an optical axis direction of the bobbin,
- wherein a width of the frame connection part is at least two times greater than a thickness of the elastic member.
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 and facing the first coil;
- an elastic member comprising an inner frame coupled with the bobbin, an outer frame coupled with the housing, and a frame connection part connecting the inner frame and the outer frame;
- a sensing magnet disposed on the bobbin;
- and
- a position sensor disposed opposite to the sensing magnet and configured to detect a movement of an optical axis direction of the bobbin,
- wherein a width of the frame connection part is 2 times to 3 times greater than a thickness of the elastic member.
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 and facing the first coil;
- an elastic member comprising an inner frame coupled with the bobbin, an outer frame coupled with the housing, and a frame connection part connecting the inner frame and the outer frame;
- a sensing magnet disposed on the bobbin;
- and
- a first position sensor disposed opposite to the sensing magnet and configured to detect a movement of an optical axis direction of the bobbin.
Dependencies are inferred from the claim text.