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KR-102962835-B1 - reflective member driving device

KR102962835B1KR 102962835 B1KR102962835 B1KR 102962835B1KR-102962835-B1

Abstract

The present embodiment relates to a reflector driving device comprising: a housing; a holder disposed within the housing; a reflector disposed in the holder; a moving plate disposed between the housing and the holder; a driving magnet and a sensing magnet disposed in the holder; a coil that electromagnetically interacts with the driving magnet; and a first sensor that detects the sensing magnet, wherein the driving magnet includes a first magnet that tilts the reflector around a first axis and a second magnet that tilts the reflector around a second axis perpendicular to the first axis, and the sensing magnet is disposed at a position that does not electromagnetically interact with the coil.

Inventors

  • 이성국

Assignees

  • 엘지이노텍 주식회사

Dates

Publication Date
20260511
Application Date
20210401

Claims (20)

  1. Housing; A holder disposed within the above housing; A reflective member disposed in the above holder; A moving plate disposed between the above housing and the above holder; A first magnet and a first coil that tilt the above-mentioned reflective member around a first axis; A second magnet and a second coil that tilt the above-mentioned reflective member around a second axis perpendicular to the first axis; A sensing magnet placed in the above holder; A first sensor for detecting the above-mentioned sensing magnet; and It includes a second sensor that detects the second magnet, and The first sensor detects a tilt centered on the first axis of the reflective member, and The second sensor detects a tilt centered on the second axis of the reflective member, and A reflective member driving device in which the distance between the center of the sensing magnet and the moving plate is longer than the distance between the center of the first magnet and the moving plate in the direction of the third axis perpendicular to each of the first axis and the second axis.
  2. In paragraph 1, The first magnet is positioned on the lower surface of the holder, and The second magnet is positioned on both sides of the holder, and The above-mentioned sensing magnet is a reflective member driving device disposed on both sides of the above-mentioned holder.
  3. In paragraph 1, A reflective member driving device in which the distance between the sensing magnet and the first sensor is shorter than the distance between the second magnet and the second sensor.
  4. In paragraph 1, The above-mentioned sensing magnet includes a first surface facing the first sensor, and The second magnet above includes a first surface facing the second sensor, and A reflective member driving device in which the area of the first surface of the second magnet is larger than the area of the first surface of the sensing magnet.
  5. In paragraph 2, The above sensing magnet is a reflective member driving device that protrudes more than the second magnet from both sides of the holder.
  6. In paragraph 1, The second magnet comprises a first sub-magnet disposed on a first side of the holder and a second sub-magnet disposed on a second side opposite to the first side of the holder. The above sensing magnet is a reflective member driving device comprising a first sensing magnet disposed on the first side of the holder and a second sensing magnet disposed on the second side of the holder.
  7. In paragraph 6, The first sensor includes a first sub-sensor that detects the first sensing magnet and a second sub-sensor that detects the second sensing magnet. The second sensor includes a third sub-sensor that detects the first sub-magnet and a fourth sub-sensor that detects the second sub-magnet. A reflection member driving device in which the distance between the first sub-sensor and the second sub-sensor is the same as the distance between the third sub-sensor and the fourth sub-sensor.
  8. In paragraph 2, The above sensing magnet is a reflective member driving device that is spaced further from the above moving plate than the second magnet.
  9. In paragraph 1, It includes a substrate disposed in the above housing, and The first sensor is disposed on the substrate, and The above housing includes a hole in which the first sensor is placed, and A reflective member driving device in which the length of the hole of the housing is shorter than the length of the sensing magnet in the direction of the second axis.
  10. In paragraph 1, A reflective member driving device in which at least a portion of the sensing magnet overlaps with the housing in the direction of the second axis.
  11. In paragraph 2, A reflective member driving device in which at least a portion of the sensing magnet overlaps with the second coil in the direction of the third axis.
  12. Housing; A holder disposed within the above housing; A reflective member disposed in the above holder; A moving plate disposed between the above housing and the above holder; A first magnet and a second magnet disposed in the above holder; A first coil that tilts the reflective member around a first axis through electromagnetic interaction with the first magnet; A second coil that tilts the reflective member around a second axis perpendicular to the first axis through electromagnetic interaction with the second magnet; A sensing magnet placed in the above holder; A first sensor for detecting the above-mentioned sensing magnet; and It includes a second sensor that detects the second magnet, and The distance between the sensing magnet and the first sensor is shorter than the distance between the second magnet and the second sensor, and The first sensor detects a tilt centered on the first axis of the reflective member, and The second sensor detects a tilt centered on the second axis of the reflective member, and A reflective member driving device in which the distance between the center of the sensing magnet and the moving plate is longer than the distance between the center of the first magnet and the moving plate in the direction of the third axis perpendicular to each of the first axis and the second axis.
  13. In Paragraph 12, The first magnet is positioned on the lower surface of the holder, and The second magnet is positioned on both sides of the holder, and The above-mentioned sensing magnet is a reflective member driving device disposed on both sides of the above-mentioned holder.
  14. In Paragraph 12, The above sensing magnet is a reflective member driving device that is spaced further from the above moving plate than the second magnet.
  15. In Paragraph 12, A reflective member driving device in which at least a portion of the sensing magnet overlaps with the housing in the direction of the second axis.
  16. Printed circuit board; An image sensor disposed on the above printed circuit board; A reflective member driving device according to any one of claims 1 to 15; and A camera device comprising a lens disposed in the optical path formed by the reflector of the above-mentioned reflector driving device and the image sensor.
  17. entity; A camera device of claim 16 disposed on the above main body; and An optical device comprising a display disposed on the main body and outputting one or more of a video and an image captured by the camera device.
  18. delete
  19. delete
  20. delete

Description

Reflective member driving device This embodiment relates to a reflective member driving device. A camera device is a device that captures a subject as a photo or video, and is installed in optical devices such as smartphones, drones, vehicles, etc. Recently, camera devices require Optical Image Stabilization (OIS) functionality to correct image shake caused by user movement in order to improve image quality, Auto Focus (AF) functionality to automatically adjust the distance between the image sensor and the lens to align the lens focal length, and zoom functionality to increase or decrease the magnification of distant subjects through a zoom lens. (Patent Document 1) US 2020-0396358 A1 FIG. 1 is a perspective view of a camera device according to the present embodiment. FIG. 2 is a bottom perspective view of a camera device according to the present embodiment. FIG. 3 is a plan view of a camera device according to the present embodiment. Figure 4 is a cross-sectional view taken from AA of Figure 3. FIG. 5 is an exploded view of a camera device according to the present embodiment. FIG. 6 is a perspective view of a reflective member driving device according to the present embodiment. FIG. 7 is an exploded perspective view of a reflective member driving device according to the present embodiment. FIG. 8 is a bottom exploded perspective view of a reflective member driving device according to the present embodiment. FIGS. 9 and FIGS. 10 are drawings for explaining the structure related to the moving plate of a reflective member driving device according to the present embodiment. FIG. 11 is a perspective view of a part of the configuration of a reflective member driving device according to the present embodiment. FIG. 12 is a cross-sectional view of a reflector driving device in the state shown in FIG. 11. FIG. 13 is a perspective view of a part of the configuration of a reflective member driving device according to the present embodiment. FIG. 14 is a plan view of a part of the configuration of a reflective member driving device according to the present embodiment. FIG. 15 is a cross-sectional view of a part of the configuration of a reflective member driving device according to the present embodiment. FIG. 16 is a perspective view illustrating the arrangement structure of the magnet, coil, and sensor of a reflective member driving device according to the present embodiment. FIGS. 17 to 19 are drawings for explaining the tilt around the x-axis of a reflector driving device according to the present embodiment. FIGS. 20 to 22 are drawings for explaining the tilt around the y-axis of a reflector driving device according to the present embodiment. FIG. 23 is a perspective view of a lens driving device according to the present embodiment. FIG. 24 is a perspective view with some components of the lens driving device according to the present embodiment omitted. FIG. 25 is a perspective view of the lens driving device in the state shown in FIG. 24, viewed from a different direction. FIG. 26 is a perspective view with some components of the lens driving device according to the present embodiment omitted. FIG. 27 is a perspective view of a lens driving device according to the present embodiment in which components such as a substrate and a coil are omitted. FIG. 28 is a perspective view of the lens driving device in the state shown in FIG. 27 with the first lens and related components omitted. FIG. 29 is a perspective view and a partial enlarged view of a part of the configuration of a lens driving device according to the present embodiment. FIG. 30 is a diagram illustrating the arrangement structure of the coil and sensor of a lens driving device according to the present embodiment. FIG. 31 is a perspective view of the lens driving device in the state shown in FIG. 27 with the second housing omitted. FIG. 32 is a perspective view of the lens driving device in the state shown in FIG. 31 with the guide rail omitted. FIG. 33 is an enlarged view of a part of the configuration of a lens driving device according to the present embodiment. FIG. 34 is a perspective view of the first moving part, the second moving part, and related components of a lens driving device according to the present embodiment. FIG. 35 is a perspective view of the second moving part and related components of the lens driving device according to the present embodiment. FIG. 36 is an exploded view of a lens driving device according to the present embodiment. FIG. 37 is a perspective view of the second housing of the lens driving device according to the present embodiment. FIGS. 38 and FIGS. 39 are exploded perspective views of some components of a lens driving device according to the present embodiment. FIG. 40 is a cross-sectional view of a lens driving device according to the present embodiment. FIGS. 41 to 43 are drawings for explaining the implementation of the zoom function and autofocus function of a lens driving device according to the present embodime