CAMERA MODULE

• US 20180164661A1
• Filed: 05/25/2016
• Published: 06/14/2018
• Est. Priority Date: 07/13/2015
• Status: Abandoned Application

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: SEKIMOTO, Yoshihiro, NAKATA, Morikazu
• Application Number:
  US15/577,828
• Publication Number:
  US 20180164661A1
• Time in Patent Office: Days
• 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 7/021 for more than one lens
• CPC Class Codes: G02B 7/08 adapted to co-operate with a remote control mechanism
• CPC Class Codes: G02B 7/09 adapted for automatic focusing or varying magnification
• CPC Class Codes: G03B 2205/0015 by displacing one or more optical elements normal to the optical axis
• 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: G03B 5/04 Vertical adjustment of lens; Rising fronts
• CPC Class Codes: G03B 5/06 Swinging lens about normal to the optical axis
• CPC Class Codes: H02K 41/0356 moving along a straight path
• CPC Class Codes: H02K 5/24 specially adapted for suppression or reduction of noise or vibrations

Abstract

Accuracy of image stabilization is to be improved by reduction in a resonance peak. A coil (OIS coil 13) that is provided in one of a movable portion and a fixed portion (base 12) in a driving portion of a camera module (50) is arranged so as to be deviated to a side of a center of gravity (G) of the movable portion with a polarized surface (10a) of a permanent magnet (10), which is provided in the other, as a reference.

Claims

1. :

A camera module, comprising;

an imaging lens; and

a driving portion that moves the imaging lens in a direction vertical to an optical axis, wherein

the driving portion includes a movable portion on which the imaging lens is mounted and a fixed portion which is not displaced at a time of image stabilization,

a permanent magnet is included in one of the movable portion and the fixed portion and a coil is included in the other one of the movable portion and the fixed portion,

one magnetic pole of the permanent magnet faces the optical axis,

a surface of the coil, which is orthogonal to a winding axis of the coil, faces a surface of the permanent magnet, which is orthogonal to a polarized surface of the permanent magnet and substantially vertical to the optical axis, in parallel,

the coil is arranged to be deviated to a side of a center of gravity of the movable portion with the polarized surface as a reference, and

at least part of a portion of the coil which portion is arranged on the side of the center of gravity of the movable portion faces the permanent magnet.

2. :

The camera module according to claim 1, wherein a pair of permanent magnets, each of which is the permanent magnet, and a pair of coils, each of which is the coil, are provided to correspond to one movement direction of the driving portion, and each of the pair of coils is arranged to be deviated to the side of the center of gravity of the movable portion with the polarized surface as the reference.

3. :

The camera module according to claim 1, further comprising

a displacement detection portion that detects a displacement amount of the imaging lens in the direction vertical to the optical axis, wherein

a pair of permanent magnets, each of which is the permanent magnet, and a pair of coils, each of which is the coil, are provided to correspond to one movement direction of the driving portion, and one of the pair of coils is arranged to be deviated to the side of the center of gravity of the movable portion with the polarized surface as the reference, and

the displacement detection portion is arranged to face the permanent magnet arranged in a side opposite to the one of the pair of coils with the center of gravity of the movable portion as a reference.

4. :

The camera module according to claim 1, wherein the permanent magnet is included in the movable portion.

5. :

The camera module according to claim 1, further comprising a damper material that suppresses vibrations of the movable portion.