JP5079836B2 - Anti-shake structure of lens autofocus module - Google Patents

Anti-shake structure of lens autofocus module Download PDF

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JP5079836B2
JP5079836B2 JP2010067520A JP2010067520A JP5079836B2 JP 5079836 B2 JP5079836 B2 JP 5079836B2 JP 2010067520 A JP2010067520 A JP 2010067520A JP 2010067520 A JP2010067520 A JP 2010067520A JP 5079836 B2 JP5079836 B2 JP 5079836B2
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lens
axis
shake
structure
autofocus module
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JP2011203283A (en
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富源 呉
朝彰 胡
益良 ▲たん▼
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台灣東電化股▲ふん▼有限公司
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Description

  The present invention relates to a camera shake prevention structure of a type of lens autofocus module.

  The present invention relates to an anti-shake structure (Anti Shake, AS) structure of an auto focus (Auto Focus, AF) module of a lens, and more particularly to an anti-shake structure used for a lens auto focus module of a high-level camera. .

  Due to technological advances, the volume of digital cameras has been greatly reduced, and at present, the digital camera function is incorporated into most of small electronic devices such as mobile phones, which are caused by miniaturization of lens modules. However, as the demands on imaging quality and performance are increasing, the number of pixels reaches 1 million pixels, and it is equipped with functions such as multi-autofocus (AF) and camera shake prevention (AS). This is a clear difference from a low-level camera.

  If a function is added to the camera module, it is necessary to add a corresponding module mechanism, and as the number of module mechanisms increases, the volume may increase. Thus, how to reduce the mechanism of various functions of the imaging module is a target of research and development of each camera module manufacturer.

  There are many types of auto-focus drive mechanisms in the well-known micro-type lens, and the most commonly used at present is a voice coil motor (VCM), which is a combination of a coil magnet and a spring. The function of changing the autofocus and focal length is achieved by holding the lens and moving it back and forth in the optical axis direction. It is suitable for short-distance driving of microlens autofocus because of its advantages such as small volume, low power consumption, accurate driving and low cost.

  The anti-shake technique has been achieved by several methods. For example, the imaging element compensates for the motion by the holding portion of the mechanism, thereby canceling the influence of the image obscuration by the vibration process. Alternatively, a mechanical structure is provided in the lens to remove camera shake. Alternatively, horizontal and vertical vibrations of the imaging element are detected by two gyro sensors, and motion compensation is performed using magnetic force.

  In Patent Document 1 “ANTI-SHAKE AUTO-FOCUS MODULAR STRUCTURE” by the present inventor, the entire autofocus module is driven using the movement signal generated by the movement sensor to perform instantaneous movement of the horizontal XY axes. Correct camera shake.

  The inventor of this application designed a camera shake prevention structure for a new lens autofocus module based on the conventional structure. In the conventional invention, the entire autofocus module was moved to correct camera shake. On the other hand, in the present invention, by moving only one lens of the lens device, the camera shake is corrected, the camera shake prevention structure is simpler, can be driven by power saving, and has a speedy camera shake correction function. It shall meet the requirements of the lens module of the high level camera.

U.S. Patent No. 12 / 630,688

  An object of the present invention is to provide a camera shake prevention structure of a lens autofocus module used in a lens device of a high-level camera to which a camera shake prevention structure is coupled.

  In order to achieve the above-mentioned object, a main technical feature of the present invention is to provide an anti-shake structure of a kind of lens autofocus module, which concentrates a light beam on an image sensor. This structure is an auto focus module (Auto-Focus Module), which drives the lens set to move back and forth (Z-axis) in the light beam entrance direction and collects it on the image sensor. A frame having a cover at the top and having a hollow center and fixing the autofocus module, a lens bracket, a correction lens, and a plurality of hanging lines (Suspension Wire) and one end is fixed to the cover on the frame. The lens bracket that suspends the correction lens in the light beam entry direction below the lens set, and the lens bracket is driven to move horizontally (X-axis or Y-axis) to correct image blur due to camera shake. And a shake correction driving unit.

  The following technical feature of the present invention is the above-described anti-shake structure of the lens autofocus module, wherein the shake correction drive unit includes a magnet assembly including at least one X-axis magnet and at least one Y-axis magnet; Each includes at least one X-axis coil and at least one Y-axis coil corresponding to the X-axis magnet and the Y-axis magnet, and receives the electromagnetic field generated by the blur signal to drive the lens bracket and the correction lens. It includes a coil assembly that moves the X axis and the Y axis, and an X axis sensor and a Y axis sensor corresponding to the X axis magnet and the Y axis magnet. A displacement detection assembly for achieving a correct correction position.

  Another technical feature of the present invention is the above-described anti-shake structure of the autofocus module of the lens, wherein the magnet assembly is fixed to a bottom blur correction drive unit of the autofocus module, and the coil assembly and the movement amount detection assembly. Is connected to the lens bracket, or the coil assembly and the displacement detection assembly are fixed to the bottom of the autofocus module, the magnet assembly is fixed to the bottom of the autofocus module, and the coil assembly is connected to the lens The coil assembly and the movement detection assembly are connected to a sensor mounting sheet, and the coil assembly and the movement detection assembly are connected to the bottom of the lens bracket.

  Another technical feature of the present invention is to provide an anti-camera structure of an autofocus module of a kind of lens, which is focused on an image sensor, and the structure is a frame, and a cover is provided inside. The frame having a hollow hole in the center and having a plurality of through holes in the cover, and an autofocus module, the lens set being fixed to the cover of the frame in the light beam entrance direction. The frame that is moved back and forth (Z axis) and condensed on the image sensor, and a lens bracket, a correction lens is disposed, and a plurality of hanging lines are connected. The lens, the end of which is connected to the sensor mounting sheet through the through hole of the cover, and the correction lens is hung so as to correspond to the light ray entering direction above the lens set A racket and a blur correction driving unit that drives the lens bracket and moves it horizontally (X-axis or Y-axis) to correct image blur due to camera shake. It is.

  According to still another technical feature of the present invention, in the above-described anti-shake structure of the autofocus module of the lens, the magnet assembly is fixed to the cover of the frame, and the coil assembly and the movement detection assembly are the lens bracket. Or the coil assembly and the displacement detection assembly are connected to the cover of the frame, and the magnet assembly is connected to the bottom of the lens bracket.

  The present invention is the above-described anti-camera structure of the autofocus module for a lens, and achieves the objective of anti-shake completely. The technologies of the various embodiments can be used independently, and the technologies of two or more embodiments can be combined and used. For example, the correction lens and its suspension mechanism are combined into one autofocus module. By adding it inside, the purpose of multiple correction can be achieved.

It is a side view of 1st Example of this invention. It is a three-dimensional exploded view of the first embodiment of the present invention. It is a side view of 2nd Example of this invention. It is a side view of 3rd Example of this invention. It is a side view of 4th Example of this invention. It is a side view of 5th Example of this invention. It is a side view of 6th Example of this invention.

  Please refer to FIG. 1 and FIG. 2 together. FIG. 1 is a side view of a first embodiment of the present invention, and FIG. 2 is a three-dimensional exploded view of the first embodiment of the present invention. The anti-camera structure of the lens autofocus module of the present invention is a high-level imaging module that can be attached to a portable device (not shown) such as a camera or a mobile phone.

  In general, a high-level portable device is provided with a shake detection element such as a gyro sensor or an acceleration sensor, and the shake detection element generates a shake signal. The present invention is a camera shake sensor having an anti-shake structure that captures a shake signal of the shake detection element, or the camera shake sensor 100 is provided in the present invention.

  The structure of the present invention includes an image circuit board 10, an auto focus module 20 (Auto-Focus Module) 20, and an anti-shake mechanism 30. Among them, an image sensor 11 is provided on the image circuit board 10, the image sensor 11 covers a sensor placement sheet 12, and a polarizing filter 13 is placed at the center of the sensor placement sheet.

  Among them, the autofocus module 20 drives and focuses the lens set 21 (Lens), and driving elements such as a voice coil motor (VCM), a step motor, a piezoelectric actuator, and an ultrasonic motor can be used. The lens set 21 captures a light image, and the lens set 21 and the image sensor 11 are positioned on a linear position in a light beam entering direction (Z-axis direction), and the autofocus module 20 drives the lens set 21. Then, the image is taken back and forth in the light beam entry direction (Z-axis direction) so that the image captured by the lens set 21 is condensed on the image sensor 11.

  The autofocus module 20 includes a frame 22, a cover 221 is provided above the frame 22, the center is a circular hollow shape, and an outer cover 222 covers the outside of the frame 22. A hollow is provided to allow the lens set 21 to be mounted inside.

  The base 23 is connected to the bottom of the cover 221 in the frame 22, the lens mounting sheet 231 mounts the lens set 21, and the outside of the lens mounting sheet 231 is covered with a coil 232, Four magnets 233 corresponding to the coils 232 are provided.

  The lens placement sheet 231 is connected to a movable inner ring of an upper plate spring 234 and a lower plate spring 235, and an outer ring of the upper plate spring 234 and the lower plate spring 235 is fixed to the base 23, thereby The autofocus module 20 is connected to the cover 221 in the frame 22.

  Among them, the camera shake prevention mechanism 30 is disposed between the image circuit board 10 and the autofocus module 20, and the camera shake prevention mechanism 30 is provided with a lens bracket 31, a plurality of hanging lines 32, and a camera shake correction drive unit. It has been.

  Among them, the lens bracket 31 is provided with at least one set of correction lenses 311 in the center, and these hanging lines 32 are formed of a flexible wire, have conductivity, and drive current of the shake correction drive unit. Preferably, four conductive wires are provided, one end of which is connected to the cover 221 in the frame 22 and the other end is connected to the lens bracket 31, whereby the lens bracket 31 and the correction lens 311 are connected. The lens set 21 is hung so as to correspond to the upper direction in the light ray entering direction below.

  The lens bracket 31 is connected to the shake correction drive unit, and the shake correction drive unit includes an anti-shake drive circuit board 33, a fixed frame 34, a magnet assembly 35, a coil assembly 36, and a movement amount detection assembly 37. An anti-vibration drive circuit provided on the anti-shake drive circuit board 33 detects a shake signal generated by the shake sensor 100 and drives the lens bracket 31 to be horizontal (X axis or Y axis). Accordingly, the image blur caused by camera shake is corrected.

  In the first embodiment of the present invention, the shake correction driving unit fixes the magnet assembly 35 to the bottom of the base 23 of the autofocus module 20 by the fixed frame 34 to form a non-movable part. Includes at least one X-axis magnet 35x and Y-axis magnet 35y, and the anti-shake drive circuit board 33 is connected to the lens bracket 31 or to the coil assembly 36 and the movement amount detection assembly 37. Thus, the movable part is formed.

  The coil assembly 36 includes at least one X-axis coil 36x and a Y-axis coil 36y. The X-axis coil 36x corresponds to the position of the X-axis magnet 35x, and the Y-axis coil 36y corresponds to the Y-axis magnet 35y. Corresponds to position. Accordingly, when the X-axis coil 36x and the Y-axis coil 36y generate an electromagnetic field, the X-axis magnet 35x and the Y-axis magnet 35y form an X-axis or Y-axis attractive force or exclusion force, and the lens bracket 31 and The correction lens 311 is moved in the X axis or Y axis.

  The movement amount detection assembly 37 includes an X-axis sensor 37x and a Y-axis sensor 37y, corresponding to the X-axis magnet 35x and the Y-axis magnet 35y, respectively, and detecting the movement amount of the X-axis or Y-axis, thereby The correction lens 311 can be moved to an accurate correction position. The movement amount detection assembly 37 may include a movement sensing element, for example, a hall sensor, an MR sensor, or a fluxgate sensor.

  FIG. 3 is a side view of the second embodiment of the present invention. In this embodiment, the movable part element and the non-movable part element of the first embodiment (FIG. 1) are made to face each other, and among these, The non-movable part is configured such that the anti-shake drive circuit board 33 is fixed to the bottom of the base 23 of the autofocus module 20 and further connected to the coil assembly 36 and the movement amount detection assembly 37.

  The movable portion of the shake correction driving unit connects the magnet assembly 35 to the lens bracket 31, and the lens bracket 31 corresponds to the coil assembly 36 and the movement amount detection assembly 37.

  FIG. 4 is a side view of a third embodiment of the present invention, in which the sensor mounting sheet 12 is connected to the bottom of the frame 22, and the magnet assembly 35 is connected to the sensor mounting sheet 12. A non-movable part is formed.

  The coil assembly 36 and the movement amount detection assembly 37 are connected to the anti-shake drive circuit board 33 and further connected to the bottom of the lens bracket 31 to form a movable part, and the coil assembly 36 and the movement The quantity detection assembly 37 corresponds to the magnet assembly 35 and drives the lens bracket 31 to move in the X-axis or Y-axis direction.

  FIG. 5 is a side view of the fourth embodiment of the present invention. In this embodiment, the movable part element and the non-movable part element of the third embodiment (FIG. 4) are made to correspond to each other. The movable part is connected to the sensor placement sheet 12 by the anti-shake drive circuit board 33, and the coil assembly 36 and the movement amount detection assembly 37 are further connected thereto.

  The movable portion of the blur correction drive unit connects the magnet assembly 35 to the bottom of the lens bracket 31, and the magnet assembly 35 corresponds to the coil assembly 36 and the movement amount detection assembly 37. To move in the X-axis or Y-axis direction.

  FIG. 6 is a side view of the fifth embodiment of the present invention. In this embodiment, a plurality of through holes 225 corresponding to the hanging lines are provided in the cover 221 in the frame 22, one end of these hanging lines 32 is connected to the lens bracket 31, and the other end is the cover 221. The lens bracket 31 and the correction lens 311 are attached in the light ray entrance direction above the lens set 21 by passing through the through hole 225 and connected to the sensor placement sheet 12.

  The non-movable part of the shake correction driving part connects the magnet assembly 35 to the frame 22, and the movable part of the shake correction driving part connects the anti-shake driving circuit board 33 to the bottom surface of the lens bracket 31. Further, the coil assembly 36 and the movement amount detection assembly 37 also correspond to the magnet assembly 35.

  FIG. 7 is a side view of the sixth embodiment of the present invention. In this embodiment, the movable portion element and the non-movable portion element of the fifth embodiment (FIG. 6) are made to correspond to each other, and the non-movable portion of the shake correction driving portion places the anti-shake drive circuit board 33 on the frame 22. The coil assembly 36 and the movement amount detection assembly 37 are further connected.

  The movable portion of the shake correction drive unit connects the magnet assembly 35 to the bottom surface of the lens bracket 31, and causes the coil assembly 36 and the movement amount detection assembly 37 to correspond to the magnet assembly 35.

11 Image sensor 12 Sensor mounting sheet 13 Polarizing filter 20 Autofocus module 21 Lens set 22 Frame 221 Cover 222 Outer cover 225 Through hole 23 Base 231 Lens mounting sheet 232 Coil 233 Magnet 234 Upper leaf spring 235 Lower leaf spring 30 Camera shake Prevention mechanism 31 Lens bracket 311 Correction lens 32 Hanging line 33 Anti-shake drive circuit board 34 Fixed frame 35 Magnet assembly 35x X-axis magnet 35y Y-axis magnet 36 Coil assembly 36x X-axis coil 36y Y-axis coil 37 Movement amount detection assembly 37x X axis sensor 37y Y axis sensor 100 Camera shake sensor

Claims (20)

  1. In the anti-shake structure of the lens autofocus module, the light beam is focused on the image sensor, and the sensor mounting sheet is provided on the image sensor.
    An autofocus module, which drives the lens set to move in the front-rear direction Z-axis in the light beam entrance direction and focuses the image sensor;
    A frame having a cover on the upper side and having a hollow center and fixing the autofocus module;
    A lens bracket, wherein at least one correction lens is combined and connected to a plurality of suspension lines, one end of each of the suspension lines is fixed to a cover on the frame, and the correction lens is disposed below the lens set. The lens bracket that hangs in the light entry direction of
    A shake correction drive unit that drives the lens bracket and moves it to the horizontal X-axis or Y-axis to correct image blur due to camera shake; and
    A structure for preventing camera shake of an autofocus module of a lens, characterized by comprising:
  2. In the camera shake prevention structure of the autofocus module of the lens according to claim 1,
    A camera shake sensor that detects camera shake, generates a shake signal, sends the shake signal to a shake correction drive unit, and drives the lens bracket to cause horizontal X-axis or Y-axis movement. , The camera shake sensor above,
    An anti-shake structure for an autofocus module of a lens, further comprising:
  3. In the camera shake prevention structure of the autofocus module of the lens according to claim 1,
    These hanging lines are made of a flexible wire, and the structure for preventing camera shake of a lens autofocus module.
  4. In the camera shake prevention structure of the autofocus module of the lens according to claim 1,
    An anti-shake structure for an autofocus module of a lens, wherein these hanging lines have conductivity and are used as drive current conduction lines of the shake correction drive unit.
  5. The camera shake prevention structure of the lens autofocus module according to claim 1,
    A magnet assembly comprising at least one X-axis magnet and at least one Y-axis magnet;
    A coil assembly including at least one X-axis coil and at least one Y-axis coil respectively corresponding to the X-axis magnet and the Y-axis magnet, and receiving the electromagnetic field generated by a blur signal; The coil assembly for driving the correction lens to move the X axis and the Y axis;
    A structure for preventing camera shake of an autofocus module of a lens, characterized by comprising:
  6. 6. The anti-shake structure of the autofocus module for a lens according to claim 5, wherein the shake correction drive unit further comprises:
    A displacement detection assembly that includes an X-axis sensor and a Y-axis sensor corresponding to the X-axis magnet and the Y-axis magnet, and detects an amount of movement of the X-axis or Y-axis to achieve an accurate correction position. Let the above moving amount detection assembly,
    A structure for preventing camera shake of an autofocus module of a lens, characterized by comprising:
  7.   7. The lens autofocus structure according to claim 6, wherein the X-axis sensor is a movement sensor element such as a Hall sensor, MR sensor, or fluxgate sensor. Anti-shake structure of the module.
  8.   6. The anti-camera structure of an autofocus module for a lens according to claim 5, wherein the magnet assembly is fixed to the bottom of the autofocus module, and the coil assembly is connected to the lens bracket. Anti-shake structure of the focus module.
  9.   6. The anti-camera structure of an autofocus module for a lens according to claim 5, wherein the coil assembly is fixed to the bottom of the autofocus module, and the magnet assembly is connected to the lens bracket. Anti-shake structure of the focus module.
  10.   6. The anti-shake structure of an autofocus module for a lens according to claim 5, wherein the coil assembly is connected to the sensor mounting sheet, and the magnet assembly is connected to the bottom of the lens bracket. Anti-shake structure of auto focus module.
  11.   6. The anti-shake structure of an autofocus module for a lens according to claim 5, wherein the magnet assembly is connected to the sensor mounting sheet, and the coil assembly is connected to the bottom of the lens bracket. Anti-shake structure of auto focus module.
  12. In shake prevention structure of the autofocus module lens, the light rays focused on the image sensor, the sensor mounting seat provided in the image sensor, the structure,
    A frame having a cover at the top , a hollow hole at the center, and a plurality of through holes in the cover;
    An autofocus module, which is fixed to the cover of the frame, moves the lens set to the Z axis in the front-rear direction in the light ray entrance direction, and focuses the light on the image sensor;
    A lens bracket, a correction lens is disposed, a plurality of hanging lines are connected, and another end of the hanging line is connected to the sensor mounting sheet through the through hole of the cover, and the correction is performed. The lens bracket is hung so as to correspond to the light ray entry direction above the lens set; and
    A blur correction driving unit that drives the lens bracket to move the X-axis or Y-axis in the horizontal direction, thereby correcting image blur due to camera shake; and
    A structure for preventing camera shake of an autofocus module of a lens, characterized by comprising:
  13. In the camera shake prevention structure of the autofocus module of the lens according to claim 12,
    A camera shake sensor that detects camera shake, generates a shake signal, sends the shake signal to a shake correction drive unit, and drives the lens bracket to cause horizontal X-axis or Y-axis movement. , The camera shake sensor above,
    An anti-shake structure for an autofocus module of a lens, further comprising:
  14. In the camera shake prevention structure of the autofocus module of the lens according to claim 12,
    These hanging lines are made of a flexible wire, and the structure for preventing camera shake of a lens autofocus module.
  15. In the camera shake prevention structure of the autofocus module of the lens according to claim 12,
    An anti-shake structure for an autofocus module of a lens, wherein these hanging lines have conductivity and are used as drive current conduction lines of the shake correction drive unit.
  16. The camera shake prevention structure of the lens autofocus module according to claim 12, wherein
    A magnet assembly comprising at least one X-axis magnet and at least one Y-axis magnet;
    A coil assembly including at least one X-axis coil and at least one Y-axis coil respectively corresponding to the X-axis magnet and the Y-axis magnet, and receiving the electromagnetic field generated by a blur signal; The coil assembly for driving the correction lens to move the X axis and the Y axis;
    A structure for preventing camera shake of an autofocus module of a lens, characterized by comprising:
  17. The anti-shake structure of the autofocus module for a lens according to claim 16, wherein the shake correction drive unit further comprises:
    A displacement detection assembly that includes an X-axis sensor and a Y-axis sensor corresponding to the X-axis magnet and the Y-axis magnet, and detects an amount of movement of the X-axis or Y-axis to achieve an accurate correction position. Let the above moving amount detection assembly,
    A structure for preventing camera shake of an autofocus module of a lens, characterized by comprising:
  18.   18. The lens autofocus structure according to claim 17, wherein the X-axis sensor is a movement sensor element such as a Hall sensor, an MR sensor, or a fluxgate sensor. Anti-shake structure of the module.
  19.   17. The anti-camera structure of an autofocus module for a lens according to claim 16, wherein the magnet assembly is fixed to a cover of the frame, and the coil assembly is connected to the bottom of the lens bracket. Anti-shake structure of the focus module.
  20.   17. The anti-camera structure of an autofocus module for a lens according to claim 16, wherein the coil assembly is fixed to the bottom of the cover of the frame, and the magnet assembly is connected to the lens bracket. Anti-shake structure of the focus module.
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JP6197785B2 (en) * 2012-02-14 2017-09-20 ミツミ電機株式会社 Lens driving device and camera
KR102000197B1 (en) * 2012-05-07 2019-07-22 엘지이노텍 주식회사 Camera Module
KR102044694B1 (en) * 2012-06-05 2019-11-14 엘지이노텍 주식회사 Camera Module
KR101500034B1 (en) 2012-06-29 2015-03-06 엘지이노텍 주식회사 Camera module
KR102051501B1 (en) * 2012-07-26 2019-12-03 엘지이노텍 주식회사 Camera module
KR102047373B1 (en) * 2012-07-30 2019-11-21 엘지이노텍 주식회사 Camera Module
KR101725442B1 (en) * 2014-03-07 2017-04-11 자화전자(주) Camera lens module
KR101592286B1 (en) * 2014-10-29 2016-02-11 (주)옵티스 Camera module
KR101999358B1 (en) * 2015-09-25 2019-07-11 자화전자(주) Camera lens module

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JP2008197571A (en) * 2007-02-15 2008-08-28 Fujinon Corp Image blur correction unit, image blur correction device, and imaging device
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