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US 2019/0162562 A1Published application
Actuator and camera module including same
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsSang Hyun MIN, Jae Hyung LEE
Life of this patent
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Abstract
An actuator including a detection target disposed on a surface of a lens barrel, and a position detecting unit including two or more sensing coils and configured to detect a displacement of the detection target in a first direction perpendicular to an optical axis, wherein when the detection target moves in a second direction perpendicular to the optical axis, an area of overlap between each of the two or more sensing coils and the detection target is maintained constant.
Claims20
An actuator, comprising:
- a detection target disposed on a surface of a lens barrel;
- and
- a position detecting unit comprising two or more sensing coils and configured to detect a displacement of the detection target in a first direction perpendicular to an optical axis,
- wherein when the detection target moves in a second direction perpendicular to the optical axis, an area of overlap between each of the two or more sensing coils and the detection target is maintained constant.
1 more element
An actuator, comprising:
- a detection target disposed on a surface of a lens barrel;
- an oscillating unit comprising two or more oscillation circuits, each of the two or more oscillation circuits comprising a sensing coil;
- and
- a detecting unit configured to calculate a position of the detection target in a first direction perpendicular to an optical axis in response to a difference between frequencies of two or more oscillation signals output from the two or more oscillation circuits, respectively,
- wherein when the detection target moves in a second direction perpendicular to the optical axis, the frequencies of the two or more oscillation signals are maintained constant.
2 more elements
An actuator, comprising:
- a first detection target disposed on a lateral surface of a body and a second detection target disposed on another surface of the body;
- and
- a detecting unit comprising two or more first sensing coils configured to detect a displacement of the first detection target perpendicular to the lateral surface and two or more second sensing coils configured to detect a displacement of the second detection target perpendicular to the other surface,
- wherein overlap area of the first detection target with the first sensing coils remains constant when the body moves perpendicular to the lateral surface and overlap area of the second detection target with the second sensing coils remains constant when the body moves perpendicular to the other surface.
1 more element
Dependencies are inferred from the claim text.