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CN-122029482-A - Lens driving apparatus, and camera module and optical device including the same

CN122029482ACN 122029482 ACN122029482 ACN 122029482ACN-122029482-A

Abstract

Embodiments include a housing, a coil former disposed in the housing, a magnet disposed on the coil former, and a coil facing the magnet and moving the coil former in a first direction parallel to an optical axis by interaction with the magnet. The magnets include a first magnet disposed on one side surface of the bobbin and a second magnet disposed on the other side surface of the bobbin, and the coils include a first coil facing the first magnet in a second direction perpendicular to the first direction and a second coil facing the second magnet in a third direction perpendicular to the first direction and the second direction, and independent driving signals are supplied to each of the first coil and the second coil.

Inventors

  • JIN DAYING

Assignees

  • LG伊诺特有限公司

Dates

Publication Date
20260512
Application Date
20240930
Priority Date
20231016

Claims (10)

  1. 1. A lens movement device comprising: A housing; a bobbin disposed in the housing; A magnet provided on the bobbin, and A coil facing the magnet to move the former in a first direction parallel to an optical axis by interaction with the magnet, Wherein the magnet includes a first magnet provided on one side surface of the bobbin and a second magnet provided on the other side surface of the bobbin, Wherein the coil includes a first coil facing the first magnet in a second direction perpendicular to the first direction and a second coil facing the second magnet in a third direction perpendicular to the first direction and the second direction, and Wherein an independent drive signal is supplied to each of the first coil and the second coil.
  2. 2. The lens movement device of claim 1, comprising a spherical member disposed between the coil former and the housing.
  3. 3. The lens movement apparatus of claim 1, comprising a position sensor configured to detect displacement of the coil former, Wherein the position sensor includes a first sensor configured to detect the first magnet and a second sensor configured to detect the second magnet.
  4. 4. The lens moving apparatus of claim 1, wherein the first magnet comprises a first magnet unit and a second magnet unit, Wherein the second magnet comprises a third magnet unit and a fourth magnet unit, Wherein the first coil includes a first coil unit facing the first magnet unit and a second coil unit facing the second magnet unit, Wherein the second coil includes a third coil unit facing the third magnet unit and a fourth coil unit facing the fourth magnet unit, and Wherein an independent drive signal is supplied to each of the first to fourth coil units.
  5. 5. The lens movement apparatus of claim 4, comprising a position sensor configured to detect displacement of the coil former, Wherein the position sensor includes a first sensor configured to detect the first magnet unit, a second sensor configured to detect the second magnet unit, a third sensor configured to detect the third magnet unit, and a fourth sensor configured to detect the fourth magnet unit.
  6. 6. The lens moving apparatus according to claim 5, wherein each of the first to fourth sensors is a driver IC including a hall sensor.
  7. 7. The lens-movement device of claim 5, wherein the first sensor supplies a first drive signal to the first coil unit, Wherein the second sensor supplies a second driving signal to the second coil unit, Wherein the third sensor supplies a third driving signal to the third coil unit, and Wherein the fourth sensor supplies a fourth driving signal to the fourth coil unit.
  8. 8. The lens movement device of claim 4, comprising: A circuit board provided on the housing and electrically connected to the first to fourth coil units, and And a yoke disposed on the circuit board to generate attractive force with the magnet.
  9. 9. The lens moving apparatus according to claim 4, wherein each of the first coil unit and the second coil unit has a ring shape wound around a first axis parallel to the second direction, and Wherein each of the third coil unit and the fourth coil unit has a ring shape wound around a second axis parallel to the third direction.
  10. 10. The lens moving apparatus according to claim 4, wherein the first coil unit and the second coil unit are positioned opposite to each other with respect to a first reference line, the first reference line being a straight line parallel to the second direction and passing through the optical axis, and Wherein the third coil unit and the fourth coil unit are positioned opposite to each other with respect to a second reference line, which is a straight line parallel to the third direction and passing through the optical axis.

Description

Lens driving apparatus, and camera module and optical device including the same Technical Field Embodiments relate to a lens moving apparatus, a camera module including the lens moving apparatus, and an optical instrument. Background Voice Coil Motor (VCM) technology used in conventional general-purpose camera modules is difficult to apply to miniature camera modules intended to exhibit low power consumption, and researches related to miniature camera modules of low power consumption have been actively conducted. There is an increasing demand and production of camera-equipped electronic products, such as smartphones and cellular phones. The resolution of cameras for cellular telephones has been higher and smaller in size, and as a result, actuators for cellular telephones have also become smaller, larger in diameter, and more functional. In order to realize a high-resolution cellular phone camera, improvement in performance of the cellular phone camera, additional functions such as auto-focusing, shutter anti-shake, and zoom are required. Disclosure of Invention Technical problem Embodiments provide a lens moving apparatus, a camera device, and an optical instrument capable of correcting or compensating for a tilt of a bobbin caused by a static tilt or a moving tilt. Technical proposal A lens moving apparatus according to an embodiment includes a housing, a bobbin disposed in the housing, a magnet disposed on the bobbin, and a coil facing the magnet to move the bobbin in a first direction parallel to an optical axis by interaction with the magnet. The magnets include a first magnet disposed on one side surface of the bobbin and a second magnet disposed on the other side surface of the bobbin. The coil includes a first coil facing the first magnet in a second direction perpendicular to the first direction and a second coil facing the second magnet in a third direction perpendicular to the first direction and the second direction. An independent drive signal is supplied to each of the first coil and the second coil. The lens moving device may include a spherical member disposed between the bobbin and the housing. The lens movement device may include a position sensor configured to detect displacement of the coil former. The position sensor may include a first sensor configured to detect the first magnet and a second sensor configured to detect the second magnet. The first magnet may include a first magnet unit and a second magnet unit, and the second magnet may include a third magnet unit and a fourth magnet unit. The first coil may include a first coil unit facing the first magnet unit and a second coil unit facing the second magnet unit, and the second coil may include a third coil unit facing the third magnet unit and a fourth coil unit facing the fourth magnet unit. An independent driving signal may be supplied to each of the first to fourth coil units. The lens movement device may include a position sensor configured to detect displacement of the coil former. The position sensor may include a first sensor configured to detect the first magnet unit, a second sensor configured to detect the second magnet unit, a third sensor configured to detect the third magnet unit, and a fourth sensor configured to detect the fourth magnet unit. Each of the first to fourth sensors may be a driver IC including a hall sensor. The first sensor may supply a first driving signal to the first coil unit, the second sensor may supply a second driving signal to the second coil unit, the third sensor may supply a third driving signal to the third coil unit, and the fourth sensor may supply a fourth driving signal to the fourth coil unit. The lens moving apparatus may include a circuit board disposed on the housing and electrically connected to the first to fourth coil units, and a yoke disposed on the circuit board to generate attractive force with the magnet. Each of the first coil unit and the second coil unit may have a ring shape wound around a first axis parallel to the second direction, and each of the third coil unit and the fourth coil unit may have a ring shape wound around a second axis parallel to the third direction. The first coil unit and the second coil unit may be positioned opposite to each other with respect to a first reference line, and the first reference line may be a straight line parallel to the second direction and passing through the optical axis. The third coil unit and the fourth coil unit may be positioned opposite to each other with respect to the second reference line, and the second reference line may be a straight line parallel to the third direction and passing through the optical axis. The first coil unit and the second coil unit may be spaced apart from each other in the third direction, and the third coil unit and the fourth coil unit may be spaced apart from each other in the second direction. The spherical member may include a first spherical member disposed between a side surface of the bob