Camera lens module having position sensors between coils and yoke portions generating attractive force

• US 10,386,651 B2
• Filed: 01/05/2015
• Issued: 08/20/2019
• Est. Priority Date: 07/08/2014
• Status: Active Grant

• Current Assignee: Jahwa Electronics Company Limited
• Original Assignee: Jahwa Electronics Company Limited
• Inventors: Kim, Hee-Seoung, Kim, In-Soo, Noh, Yo-Han
• Primary Examiner(s): Carruth, Jennifer D.
• Assistant Examiner(s): Dunning, Ryan S
• Application Number:
  US15/310,285
• Publication Number:
  US 20170160558A1
• Time in Patent Office: 1,688 Days
• Field of Search: 34820899, 3482084, 3482087, 34820811, 359554, 359557, 359819, 359822, 359823, 359824, 396 52, 396 55
• CPC Class Codes: G02B 27/646 compensating for small deviations, e.g. due to vibration or shake movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68
• CPC Class Codes: G02B 7/02 for lenses supports for magnifying lenses G02B25/002
• CPC Class Codes: G03B 2205/0007 Movement of one or more optical elements for control of motion blur imaging systems in general using optical elements for stabilisation of the position of the image G02B27/64
• CPC Class Codes: G03B 2205/0069 using electromagnetic actuators, e.g. voice coils
• CPC Class Codes: G03B 5/00 Adjustment of optical system relative to image or object surface other than for focusing
• CPC Class Codes: H02K 1/34 Reciprocating, oscillating or vibrating parts of the magnetic circuit
• CPC Class Codes: H02K 11/21 Devices for sensing speed or position, or actuated thereby specially adapted for machines having non-mechanical commutating devices H02K29/06, H02K29/14
• CPC Class Codes: H02K 11/215 Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
• CPC Class Codes: H02K 33/00 Motors with reciprocating, oscillating or vibrating magnet, armature or coil system arrangements for handling mechanical energy structurally associated with motors H02K7/00, e.g. H02K7/06
• CPC Class Codes: H02K 41/0356 moving along a straight path
• CPC Class Codes: H02K 7/08 Structural association with bearings
• CPC Class Codes: H04N 23/682 Vibration or motion blur correction
• CPC Class Codes: H04N 23/687 by shifting the lens or sensor position

Abstract

A camera lens module includes a base portion to which an image stabilization carrier is mounted; two or more magnets provided in the image stabilization carrier; a coil portion including a plurality of coils and corresponding to each of the magnets; and a position sensor located between the coils. In addition to the above embodiment, various other embodiments can be implemented.

Claims

1. A camera lens module comprising:

an image stabilization carrier;

a base portion to which the image stabilization carrier is mounted;

magnets provided in the image stabilization carrier;

coil portions each including a plurality of coils and corresponding to the magnets, respectively, the coil portions facing the magnets, respectively;

position sensors each located within a space made between two coils of the plurality of coils of each of the coil portions, respectively;

auxiliary base portions disposed respectively at each lateral side of the base portion to support each of the coil portions;

a lens barrel carrier having an opening in which the image stabilization carrier is positioned for drivably supporting the image stabilization carrier and mounted in the base portion;

a ball bearing located between an inner sidewall of the lens barrel carrier and an outer sidewall of the image stabilization carrier to allow the image stabilization carrier to roll on the lens barrel carrier; and

yoke portions located on the lens barrel carrier and separated from the magnets, the yoke portions facing upwards to face bottoms of the magnets, respectively, wherein each of the yoke portions comprises a plurality of yokes spaced apart from each other, the each of the yoke portions generates attractive force to corresponding each of the magnets, and the plurality of yokes of the yoke portions face different area of the same side of corresponding each of the magnets.

2. The camera lens module as claimed in claim 1, wherein each of the position sensors is disposed at a peripheral portion of the coils and is disposed at a location where a magnetic field of the coils is not substantially affected by the position sensors.

3. The camera lens module as claimed in claim 1, wherein the coils are connected to each other in series.

4. The camera lens module as claimed in claim 1, wherein the plurality of coils are coils each of which an axis is parallel to a bottom of the base portion.

5. A camera lens module comprising:

an image stabilization carrier;

a base portion having an upper opening through which the image stabilization carrier is inserted;

a first image stabilization magnet positioned on a first side of the image stabilization carrier;

a second image stabilization magnet positioned on a second side of the image stabilization carrier;

first image stabilization coils facing the first image stabilization magnet;

second image stabilization coils facing the second image stabilization magnet, the second image stabilization coils and the first image stabilization coils facing different directions;

a first position sensor interposed in a space made between the first image stabilization coils;

a second position sensor interposed in a space made between the second image stabilization coils;

a first auxiliary base portion and a second auxiliary base portion disposed respectively at each lateral side of the base portion to support the first image stabilization coils and the second image stabilization coils;

a lens barrel carrier mounted in the base portion, the lens barrel carrier on which the image stabilization carrier is seated for drivably supporting the image stabilization carrier;

a ball bearing located between an inner sidewall of the lens barrel carrier and an outer sidewall of the image stabilization carrier to allow the image stabilization carrier to roll on the lens barrel carrier;

a first yoke portion and a second yoke portion located on the lens barrel carrier, the first yoke portion having yokes spaced apart and facing upwards to face a bottom of the first image stabilization magnet, the second yoke portion having yokes spaced apart and facing upwards to face a bottom of the second image stabilization magnet, each of the first and second yoke portions generates an attractive force to corresponding each of the first and second image stabilization magnets, wherein the bottoms of the first and second image stabilization magnets face a direction of a bottom of the base portion.

6. The camera lens module as claimed in claim 5, wherein axes of the first image stabilization coils and the second image stabilization coils are parallel to a bottom of the base portion.