KR102062812B1 - Camera Module - Google Patents

Camera Module Download PDF

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Publication number
KR102062812B1
KR102062812B1 KR1020120047844A KR20120047844A KR102062812B1 KR 102062812 B1 KR102062812 B1 KR 102062812B1 KR 1020120047844 A KR1020120047844 A KR 1020120047844A KR 20120047844 A KR20120047844 A KR 20120047844A KR 102062812 B1 KR102062812 B1 KR 102062812B1
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KR
South Korea
Prior art keywords
lens holder
actuator
lens
camera module
optical
Prior art date
Application number
KR1020120047844A
Other languages
Korean (ko)
Other versions
KR20130124620A (en
Inventor
김학호
Original Assignee
엘지이노텍 주식회사
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Application filed by 엘지이노텍 주식회사 filed Critical 엘지이노텍 주식회사
Priority to KR1020120047844A priority Critical patent/KR102062812B1/en
Publication of KR20130124620A publication Critical patent/KR20130124620A/en
Application granted granted Critical
Publication of KR102062812B1 publication Critical patent/KR102062812B1/en

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    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/32Means for focusing
    • G03B13/34Power focusing
    • G03B13/36Autofocus systems
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/64Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
    • G02B27/646Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B7/00Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/023Mountings, adjusting means, or light-tight connections, for optical elements for lenses permitting adjustment
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B3/00Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/10Power-operated focusing
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B5/00Adjustment of optical system relative to image or object surface other than for focusing
    • G03B5/06Swinging lens about normal to the optical axis
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/222Studio circuitry; Studio devices; Studio equipment ; Cameras comprising an electronic image sensor, e.g. digital cameras, video cameras, TV cameras, video cameras, camcorders, webcams, camera modules for embedding in other devices, e.g. mobile phones, computers or vehicles
    • H04N5/225Television cameras ; Cameras comprising an electronic image sensor, e.g. digital cameras, video cameras, camcorders, webcams, camera modules specially adapted for being embedded in other devices, e.g. mobile phones, computers or vehicles
    • H04N5/232Devices for controlling television cameras, e.g. remote control ; Control of cameras comprising an electronic image sensor
    • H04N5/23248Devices for controlling television cameras, e.g. remote control ; Control of cameras comprising an electronic image sensor for stable pick-up of the scene in spite of camera body vibration

Abstract

A camera module according to a first embodiment of the present invention includes a printed circuit board on which an image sensor is mounted; A lens holder disposed above the printed circuit board to form an optical path; A first actuator disposed above the lens holder and configured to move a single outermost lens to perform a hand shake correction function; And a second actuator configured to move the lens holder to perform an auto focusing function.

Description

Camera Module

The present invention relates to a camera module.

The camera module for ultra small size and low power consumption is difficult to apply the technology such as the VCM used in the conventional general camera module, and the related research has been actively conducted.

In the case of a camera module mounted in a small electronic product, the camera module may be frequently shocked during use, and the camera module may be minutely shaken due to the shaking of the user during shooting. In view of such a point, in recent years, the development of the camera module which installs an anti-shake means in a camera module is calculated | required.

It is an object of the present invention to provide a camera module having an auto focusing function and a camera shake correction function.

A camera module according to a first embodiment of the present invention includes a printed circuit board on which an image sensor is mounted; A lens holder disposed above the printed circuit board to form an optical path; A first actuator disposed above the lens holder and configured to move a single outermost lens to perform a hand shake correction function; And a second actuator configured to move the lens holder to perform an auto focusing function.

A camera module according to a second embodiment of the present invention includes a printed circuit board on which an image sensor is mounted; A lens holder disposed above the printed circuit board to form an optical path; A first actuator disposed below the lens holder and configured to perform a camera shake correction function by moving one last lens; And a second actuator configured to move the lens holder to perform an auto focusing function.

In the first and second embodiments, the lens holder is installed inside the camera housing, and the second actuator preferably moves the entire lens holder and the first actuator.

The first actuator may be provided as a single lens moving actuator.

In this case, the second actuator may include a plurality of magnets installed on an outer circumferential surface of the camera unit; And a plurality of coils installed on an inner side of the camera housing facing the magnet, or a plurality of coils installed on an outer circumferential surface of the camera unit. And a plurality of magnets installed on an inner side of the camera housing facing the magnet; or a support member made of a shape memory alloy material installed on an inner circumferential surface of the camera housing to connect the sidewall surface of the lens holder. It can be configured by.

The lens holder, at least one lens; And an optical apparatus disposed on an optical path formed by the lenses to adjust light passing through the lens.

In this case, the optical apparatus may include an aperture and a shutter, and installed in a space between the outermost lens supported by the actuator and the lens facing the outermost lens, or facing the image sensor and the image sensor. It may be interposed in the space between the lenses, or the space portion formed between the plurality of lenses.

The present invention implements image stabilization by tilting and shifting a single lens using a first actuator, and configures a second actuator using a voice coil motor to control the lens module and the entire first actuator up and down. By implementing the auto focusing function, the camera shake correction function and the auto focusing function can be simultaneously implemented.

In addition, since the height of the actuator for implementing the auto focusing function can be reduced, the camera module can be made smaller.

1 and 2 are side cross-sectional views schematically showing a camera module according to a first embodiment of the present invention;
3 is a plan view of FIGS. 1 and 2, and
4 and 5 are side cross-sectional views schematically showing a camera module according to a second embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

1 and 2 are side cross-sectional views schematically showing a camera module according to a first preferred embodiment of the present invention, FIG. 3 is a plan view of FIGS. 1 and 2, and FIGS. 4 and 5 are preferred embodiments of the present invention. 2 is a side cross-sectional view schematically showing a camera module according to an embodiment.

As shown, the camera module according to the present invention includes a camera housing 1 and a printed circuit board 10, a lens holder 20, and first and second actuators 30 installed inside the camera housing 1. And 40.

The camera housing 1 may be provided in a substantially box shape, and may have an opening at a center thereof, and may be configured to transfer an image image to the printed circuit board 10.

The printed circuit board 10 may have an image sensor 11 mounted on an upper surface thereof and may be installed to be spaced apart from the lower surface of the lens holder 20 by a predetermined distance. An F-PCB (not shown) is electrically connected to a surface opposite to the mounting surface of the image sensor 11 of the printed circuit board 10 to supply power to the image sensor 11 and to supply the image sensor 11. ) Can be output to the predetermined control unit.

The F-PCB may be configured to supply a control signal and power to the first actuator 30.

The lens holder 20 may have a lens unit 21 installed therein to form an optical path. The lens unit 21 may be disposed at least one or more lenses sequentially, it is also possible to interpose optical instruments such as shutters and apertures between the lenses, if necessary.

For example, when a total of two lenses are disposed on an optical path formed between the first actuator 30 and the image sensor 11, the aperture and the shutter may be disposed in a space between the two lenses. It is also possible to be disposed in the space between the lenses and the first actuator 30, or the space between the lenses and the image sensor (11). This arrangement may vary depending on the product design and the configuration of the camera unit.

In addition, the lens holder 20 may be installed to be spaced apart from the image sensor 11 by a predetermined interval, and may be installed to be capable of vertically reciprocating movement by the second actuator 40 which will be described later.

According to the first embodiment of the present invention, the first actuator 30 is an image stabilization device (OIS), which moves one outermost lens 31 in a shifting and tilting direction to the image sensor 11. The focus of the incident image may be configured not to be affected by the shaking of the camera module.

In this case, although not shown, the first and second actuators 30 and 40 are connected to the F-PCB using separate connection means or an electronic circuit pattern layer integrally formed on the surface of the lens holder 20. Control signals and power can also be applied. In this case, the shifting direction of the first lens 31 is vertical, horizontal, and horizontal directions with respect to a plane perpendicular to the incident optical axis direction.

For example, when the electronic circuit pattern layer is integrally formed on the surface of the lens holder 20, the first actuator 30, which is relatively far from the printed circuit board 10, may have the electronics without a separate connecting part. Only by mounting on a circuit pattern layer or bonding with the electronic circuit pattern layer, these can be electrically connected to each other.

As such, a technology of forming an electronic circuit pattern layer integrally on the surface of the lens holder 20 is commonly referred to as MID technology (Molded Interconnect Device Technology), which is a 2S method (2S method) which is a patterning method through double molding. ), LDS method (Laser Direct Structuring method) that performs surface patterning operation by laser exposure, etc. in the state that the lens holder 20 contains impurities reacting with light or heat, or patterning by etching the non-circuit part after front metallization It can be configured by any one of the MIPTEC method.

According to the second embodiment of the present invention, the first actuator 30 is a hand shake correction device, and moves one last lens 32 in a shifting and tilting direction to be incident on the image sensor 11. The focus of the image can be configured not to be affected by the shaking of the camera module. At this time, the first actuator 30 is the same as the first embodiment described above, the other configuration is the same as the first embodiment described above.

The second actuator 40 reciprocates the lens holder 20 up and down from the first height H1 to the second height H2 as shown by the arrows of FIGS. 1, 2, 4, and 5. It may be provided as an auto focusing unit that automatically adjusts the focus of the image incident on the image sensor 11. According to an embodiment of the present invention, the second actuator 40 may be provided with a voice coil motor structure or a structure using a shape memory alloy.

For example, the second actuator 40 having a voice coil motor structure may be installed at a position corresponding to the plurality of magnets 41 and the magnets 41 installed outside the lens holder 20. Coil 42 may be configured, and vice versa.

At this time, the other configuration except for the second actuator 40 is the same as the first embodiment described above.

On the other hand, the magnet 41 and the coil 42, as shown in Figure 3, it is preferable that two pairs are disposed on each side of the camera housing (1), a pair may be provided if necessary.

In addition, in the above-described embodiment, the case in which the camera housing 1 is in the form of a quadrangular box is illustrated as an example, but is not limited thereto. When the camera housing 1 is provided in a cylindrical shape, the A plurality of coils 42 may be installed on the inner circumferential surface of the camera housing 1, and a magnet 41 may be installed on the outer circumferential surface of the lens holder 20 so as to correspond to the coils 42.

In addition, although not shown, the second actuator 40 may be configured using a shape memory alloy (SMA). In this case, the inner peripheral surface of the camera housing 1 is provided with a support member composed of a plurality of shape memory alloys, the length of which can be deformed, by connecting the side wall surface of the lens holder 20 to the support member, the shape memory As the length of the alloy changes, the lens holder 20 may be configured to perform an auto focusing function while reciprocating in a direction parallel to the optical axis.

According to the present invention as described above, since one of the outermost lens or the rearmost lens is moved to perform an anti-shake operation (OIS) and the lens holder 20 is moved up and down to perform an auto focusing operation, thereby minimizing the size of the camera module. can do.

In addition, since the first actuator 30 and the lens holder 20 used as the camera shake prevention unit and the lens holder 20 are formed as one module, the module can be controlled to be reciprocated as a whole to perform an auto focusing function. The module can be miniaturized and obtain high quality images.

The first and second actuators 30 and 40 are MEMS piezo actuators and MEMS bimorph actuators, in addition to MEMS actuators that move using electrostatic force and piezoelectric force. MEMS thermal actuators, MEMS magnetic actuators, MEMS liquid actuators, non-MEMS actuators, silicon actuators, liquid lenses, shape memory alloy actuators, voice coil motors (MEMS thermal actuators) VCM), etc., and any possible actuators made of these combinations may be used in place of any of them.

The embodiments of the present invention described above and illustrated in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention, as will be apparent to those skilled in the art.

One; A housing 10; Printed circuit board
11; Image sensor 20; Lens holder
21; A lens unit 30; Actuator
31; Outermost lens 32; Rear lens
40; Image Stabilizer

Claims (13)

  1. A printed circuit board on which an image sensor is mounted;
    A lens holder disposed on the printed circuit board;
    An outermost lens disposed on the lens holder;
    An electronic circuit pattern layer formed on a surface of the lens holder;
    A first actuator coupled to an upper surface of the lens holder, electrically connected to the electronic circuit pattern layer, and configured to move the outermost lens to perform the image stabilization function; And
    A second actuator configured to move the lens holder to perform an auto focusing function;
    The first actuator and the lens holder overlap in the optical axis direction,
    The lower surface of the first actuator is in surface contact with the upper surface of the lens holder.
  2. A printed circuit board on which an image sensor is mounted;
    A lens holder disposed on the printed circuit board;
    One last lens disposed under the lens holder;
    An electronic circuit pattern layer formed on a surface of the lens holder;
    A first actuator coupled to a lower surface of the lens holder, electrically connected to the electronic circuit pattern layer, and configured to perform a hand shake correction function by moving the last lens of the single sheet; And
    A second actuator configured to move the lens holder to perform an auto focusing function;
    The first actuator and the lens holder overlap in the optical axis direction,
    The upper surface of the first actuator is in surface contact with the lower surface of the lens holder,
    And the second actuator and the lens holder overlap in a direction perpendicular to the optical axis direction.
  3. The method according to claim 1 or 2,
    The lens holder,
    Camera module installed inside the camera housing.
  4. The method according to claim 1 or 2,
    The second actuator,
    A camera module for moving the lens holder and the first actuator as a whole.
  5. The method according to claim 1 or 2,
    The first actuator is,
    Camera module provided with a single lens moving actuator.
  6. The method of claim 3, wherein
    The second actuator,
    A plurality of magnets installed on an outer circumferential surface of the lens holder; And
    Camera module including a plurality of coils are installed on the inner side facing the magnet of the camera housing.
  7. The method of claim 3, wherein
    The second actuator,
    A plurality of coils provided on an outer circumferential surface of the lens holder; And
    A camera module comprising a plurality of magnets installed on the inner side facing the coil of the camera housing.
  8. The method of claim 3, wherein
    The second actuator,
    The camera module is installed on the inner circumferential surface of the camera housing, comprising a support member made of a shape memory alloy material for connecting the side wall surface of the lens holder.
  9. The method according to claim 1 or 2,
    The lens holder,
    At least one lens; And
    And an optical apparatus disposed on an optical path formed by the lens to adjust light passing through the lens.
  10. The method of claim 9, wherein the optical apparatus,
    Camera module including aperture and shutter.
  11. The method of claim 9, wherein the optical apparatus,
    And a camera module interposed in a space between the outermost lens supported by the actuator and the lens facing the outermost lens.
  12. The method of claim 9, wherein the optical apparatus,
    A camera module interposed in a space between the image sensor and a lens facing the image sensor.
  13. The method of claim 9, wherein the optical apparatus,
    And a camera module interposed in a space portion formed between the plurality of lenses of the lens holder.
KR1020120047844A 2012-05-07 2012-05-07 Camera Module KR102062812B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020120047844A KR102062812B1 (en) 2012-05-07 2012-05-07 Camera Module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120047844A KR102062812B1 (en) 2012-05-07 2012-05-07 Camera Module

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KR20130124620A KR20130124620A (en) 2013-11-15
KR102062812B1 true KR102062812B1 (en) 2020-01-06

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KR1020120047844A KR102062812B1 (en) 2012-05-07 2012-05-07 Camera Module

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3451055A4 (en) 2016-04-28 2019-05-15 LG Innotek Co., Ltd. Lens driving mechanism, camera module, and optical device
KR102104453B1 (en) * 2017-11-09 2020-05-29 삼성전기주식회사 Camera module

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010048993A (en) * 2008-08-21 2010-03-04 Fujinon Corp Method of manufacturing stacked type camera module, stacked type camera module, and imaging apparatus
JP2011203283A (en) * 2010-03-24 2011-10-13 Tdk Taiwan Corp Camera-shake prevention structure of autofocus module of lens

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7893965B2 (en) * 2007-08-08 2011-02-22 Bayer Materialscience Ag Optical lens image stabilization systems
JP2011017946A (en) * 2009-07-10 2011-01-27 Sony Corp Imaging apparatus
KR20110071550A (en) * 2009-12-21 2011-06-29 엘지이노텍 주식회사 Auto focus camera module
KR101612445B1 (en) * 2010-02-01 2016-04-14 삼성전자주식회사 Lens barrel and photographing apparatus comprising the same
JP5582922B2 (en) * 2010-08-24 2014-09-03 キヤノン株式会社 Image blur correction apparatus and imaging apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010048993A (en) * 2008-08-21 2010-03-04 Fujinon Corp Method of manufacturing stacked type camera module, stacked type camera module, and imaging apparatus
JP2011203283A (en) * 2010-03-24 2011-10-13 Tdk Taiwan Corp Camera-shake prevention structure of autofocus module of lens

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