CN108873228B - Optical component driving mechanism - Google Patents

Optical component driving mechanism Download PDF

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Publication number
CN108873228B
CN108873228B CN201810431696.1A CN201810431696A CN108873228B CN 108873228 B CN108873228 B CN 108873228B CN 201810431696 A CN201810431696 A CN 201810431696A CN 108873228 B CN108873228 B CN 108873228B
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CN
China
Prior art keywords
electromagnetic driving
assembly
driving
electromagnetic
optical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201810431696.1A
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Chinese (zh)
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CN108873228A (en
Inventor
胡朝彰
范振贤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TDK Taiwan Corp
Original Assignee
TDK Taiwan Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TDK Taiwan Corp filed Critical TDK Taiwan Corp
Priority to CN202310900435.0A priority Critical patent/CN116908987A/en
Priority to US15/977,427 priority patent/US10887498B2/en
Publication of CN108873228A publication Critical patent/CN108873228A/en
Priority to US17/113,786 priority patent/US11509801B2/en
Priority to US17/114,025 priority patent/US11627241B2/en
Priority to US17/974,955 priority patent/US20230038826A1/en
Application granted granted Critical
Publication of CN108873228B publication Critical patent/CN108873228B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
    • G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
    • G02B7/1821—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors for rotating or oscillating mirrors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
    • G02B27/646—Imaging 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
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS 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
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/32—Means for focusing
    • G03B13/34—Power focusing
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS 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
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/32—Means for focusing
    • G03B13/34—Power focusing
    • G03B13/36—Autofocus systems
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS 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
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS 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
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B5/02—Lateral adjustment of lens
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS 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
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B5/04—Vertical adjustment of lens; Rising fronts
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Adjustment Of Camera Lenses (AREA)
  • Studio Devices (AREA)
  • Lens Barrels (AREA)

Abstract

The invention provides an optical component driving mechanism and an image pickup device. The movable part can bear the optical component, and the driving module can drive the movable part to rotate around a rotation axis relative to the fixed part, wherein the rotation axis is different from the optical axis of the optical component. The driving module comprises a first electromagnetic driving assembly and a second electromagnetic driving assembly. The optical axis is located between the first electromagnetic driving component and the second electromagnetic driving component, and the first electromagnetic driving component and the second electromagnetic driving component are located on one side of the movable portion. The first electromagnetic driving assembly and the second electromagnetic driving assembly are electrically independent.

Description

Optical component driving mechanism
Technical Field
The present invention relates to an optical component driving mechanism. More particularly, the present invention relates to an optical assembly drive mechanism having a drive module.
Background
With the development of technology, many electronic devices (such as smart phones or digital cameras) have photographing or video recording functions. The use of these electronic devices is becoming more and more popular and is evolving towards a convenient and light-weight design that provides more options for the user.
Some electronic devices with photographing or video recording function are provided with a lens driving module to drive an optical component to move, so as to achieve the functions of auto focus (auto focus) and optical anti-shake (Optical Image Stabilization, OIS). Light can be imaged on a photosensitive element through the optical element.
However, the lens driving module often needs to include a plurality of magnets and coils disposed around the optical assembly, which may prevent the lens driving module and the electronic device from further downsizing. Therefore, how to solve the above-mentioned problems has become an important issue.
Disclosure of Invention
The present invention is directed to an optical module driving mechanism and an image pickup apparatus, which solve the above-mentioned problems.
In order to solve the above-mentioned conventional problems, the present invention provides an optical module driving mechanism for driving an optical module, which includes a fixed portion, a movable portion and a driving module. The movable part can bear the optical component, and the driving module can drive the movable part to rotate around a rotation axis relative to the fixed part, wherein the rotation axis is different from the optical axis of the optical component. The driving module comprises a first electromagnetic driving assembly and a second electromagnetic driving assembly. The optical axis is located between the first electromagnetic driving component and the second electromagnetic driving component, and the first electromagnetic driving component and the second electromagnetic driving component are located on one side of the movable portion. The first electromagnetic driving assembly and the second electromagnetic driving assembly are electrically independent.
In an embodiment of the present invention, the first electromagnetic driving assembly and the second electromagnetic driving assembly are located at the same side of the movable portion when viewed along the optical axis direction. The first electromagnetic driving component and the second electromagnetic driving component are partially overlapped with the optical component when being seen along the direction perpendicular to the optical axis. The optical assembly driving mechanism is provided with a rectangular structure, and the first electromagnetic driving assembly and the second electromagnetic driving assembly are respectively adjacent to corners of the rectangular structure. The first electromagnetic driving assembly comprises a first electromagnetic driving element and a first electromagnetic driving member, and the second electromagnetic driving assembly comprises a second electromagnetic driving element and a second electromagnetic driving member. The first electromagnetic driving element and the second electromagnetic driving element are arranged on the movable part, and the first electromagnetic driving member and the second electromagnetic driving member are arranged on the fixed part. In some embodiments, the optical assembly driving mechanism further includes two detectors for sensing the angle changes of the movable portion and the fixed portion, and the detectors correspond to the first electromagnetic driving assembly and the second electromagnetic driving assembly, respectively.
In some embodiments, the driving module further includes a third electromagnetic driving assembly, a fourth electromagnetic driving assembly, a fifth electromagnetic driving assembly, and a sixth electromagnetic driving assembly. The third electromagnetic driving assembly and the fourth electromagnetic driving assembly are respectively and electrically connected with the first electromagnetic driving assembly and the second electromagnetic driving assembly. The optical axis is located between the third electromagnetic driving assembly and the fourth electromagnetic driving assembly, and when the optical axis is seen along the optical axis direction, the third electromagnetic driving assembly and the fourth electromagnetic driving assembly are located on the same side of the movable portion. The fifth electromagnetic driving component is used for driving the movable part to move along an axial direction relative to the fixed part, wherein the fifth electromagnetic driving component and the first electromagnetic driving component are arranged on opposite sides of the movable part, and the axial direction is perpendicular to the rotating shaft and the optical axis. The aforementioned optical axis is located between the fifth electromagnetic drive assembly and the sixth electromagnetic drive assembly. In some embodiments, the fifth electromagnetic driving assembly includes two fifth electromagnetic driving elements and a fifth electromagnetic driving member, and the sixth electromagnetic driving assembly includes two sixth electromagnetic driving elements and a sixth electromagnetic driving member, wherein the fifth electromagnetic driving elements are arranged along the optical axis direction, and the sixth electromagnetic driving elements are arranged along the optical axis direction. In some embodiments, the optical assembly driving mechanism further includes two position detection assemblies respectively disposed between the first electromagnetic driving assembly and the third electromagnetic driving assembly and between the second electromagnetic driving assembly and the fourth electromagnetic driving assembly.
The embodiment of the invention also provides an image pickup device, which comprises an optical assembly, a fixed part, a movable part and a driving module. The movable part can bear the optical component, and the driving module can drive the movable part to move relative to the fixed part. The optical component is provided with a first lens and a second lens, wherein the first lens is closer to the light incident end of the optical component than the second lens, and the first lens is larger than the second lens.
In an embodiment of the invention, the movable portion further includes a carrying element for carrying the optical element, and the carrying element has a surface, and the surface faces the light incident end and the first lens. The bearing assembly further comprises a plurality of glue grooves, wherein at least one glue groove is formed on one side of the bearing assembly close to the light incidence end and arranged on two sides of the optical assembly. When the optical component is viewed in the direction of an optical axis, the camera device is approximately provided with a rectangular structure, wherein the glue groove is positioned between the optical component and the short side of the rectangular structure. The other glue groove is formed on one side of the bearing component, which is close to a light emitting end of the optical component. The invention has the beneficial effects that the optical component driving mechanism provided by the invention is used for driving an optical component and comprises a fixed part, a movable part and a driving module. The movable part can bear the optical component, and the driving module can drive the movable part to rotate around a rotation axis relative to the fixed part, wherein the rotation axis is different from the optical axis of the optical component. The driving module comprises a first electromagnetic driving assembly and a second electromagnetic driving assembly. The optical axis is located between the first electromagnetic driving component and the second electromagnetic driving component, and the first electromagnetic driving component and the second electromagnetic driving component are located on one side of the movable portion. The first electromagnetic driving assembly and the second electromagnetic driving assembly are electrically independent, and miniaturization of the camera module and the electronic device is facilitated.
Drawings
Fig. 1 is a schematic diagram of an electronic device according to an embodiment of the invention.
Fig. 2 is a schematic diagram of an image capturing module according to an embodiment of the invention.
FIG. 3 is an exploded view of an optical assembly driving mechanism according to an embodiment of the present invention.
FIG. 4A is a schematic diagram of an optical assembly, a driving module and a position detecting assembly according to an embodiment of the invention.
FIG. 4B is a schematic diagram of an optical assembly, a driving module and a photosensitive assembly according to an embodiment of the invention.
FIG. 4C is a schematic diagram illustrating a driving module driving an optical component to move relative to a photosensitive component according to an embodiment of the invention.
Fig. 4D and 4E are schematic diagrams illustrating a driving module driving an optical component to rotate relative to a photosensitive component according to an embodiment of the invention.
Fig. 5A is a schematic diagram of an optical assembly and a driving module according to another embodiment of the present invention.
FIG. 5B is a schematic diagram of an optical assembly, a driving module, a position detecting assembly and a photosensitive assembly according to another embodiment of the present invention.
FIG. 6A is a schematic diagram of an optical assembly, a driving module and a position detecting assembly according to another embodiment of the present invention.
FIG. 6B is a schematic diagram illustrating a driving module driving an optical component to move relative to a photosensitive component according to another embodiment of the present invention.
Fig. 6C and 6D are schematic diagrams illustrating a driving module driving an optical component to rotate relative to a photosensitive component according to another embodiment of the invention.
Fig. 7A-7C are schematic diagrams of a carrier assembly and an optical assembly according to another embodiment of the present invention.
The reference numerals are as follows:
10. shell body
11. Accommodating space
12. An opening
20. Prism
30. Photosensitive assembly
40. Optical component driving mechanism
100. Movable part
110. 110' carrier assembly
111' surface
112' glue groove
113' glue groove
210. Top cover
220. Bottom cover
230. Circuit board
300. Elastic assembly
400. Hanging ring line
510. First electromagnetic driving assembly
511. First electromagnetic driving member
512. First electromagnetic driving element
520. Second electromagnetic driving assembly
521. Second electromagnetic driving member
522. Second electromagnetic driving element
530. Third electromagnetic driving assembly
531. Third electromagnetic driving member
532. Third electromagnetic driving element
540. Fourth electromagnetic drive assembly
541. Fourth electromagnetic driving member
542. Fourth electromagnetic driving element
550. Fifth electromagnetic driving assembly
551. Fifth electromagnetic driving member
552. 552', 552 "fifth electromagnetic drive element
560. Sixth electromagnetic drive assembly
561. Sixth electromagnetic driving member
562. 562', 562 "sixth electromagnetic drive element
600. Position detection assembly
610. Detector for detecting a target object
620. Sensed object
Aaxis A
E electronic device
E1 Light incident end
E2 Light emitting end
F1, F2 driving force
L external light ray
O, O' optical component
O1 first lens
O2 second lens
P camera module
R rotation axis
Detailed Description
The following describes an optical module driving mechanism according to an embodiment of the present invention, and an image pickup apparatus including the optical module driving mechanism. However, it will be readily appreciated that the embodiments of the invention provide many suitable inventive concepts that can be embodied in a wide variety of specific contexts. The specific embodiments disclosed are illustrative only, and are not intended to limit the scope of the invention in any way.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be appreciated that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Referring to fig. 1, an image capturing module P according to an embodiment of the invention may be installed in an electronic device E for taking a photograph or taking a photograph, wherein the electronic device E may be a smart phone or a digital camera, for example. In photographing or filming, the image capturing module P may receive light and image, and the image may be transmitted to a processor (not shown) provided in the electronic device E, and post-processing of the image is performed by the processor.
Referring to fig. 2, the image capturing module P includes a housing 10, a prism 20, a photosensitive assembly 30, and an optical assembly driving mechanism 40. The housing 10 has a receiving space 11 formed therein, and an opening 12 communicating with the receiving space 11 is formed in a wall surface thereof. The prism 20, the photosensitive assembly 30 and the optical assembly driving mechanism 40 may be disposed in the accommodating space 11, the optical assembly driving mechanism 40 is disposed between the prism 20 and the photosensitive assembly 30, and the opening 12 may be formed beside the prism 20. In addition, the optical component driving mechanism 40 may carry at least one optical component (e.g., the optical component O shown in fig. 3 or the optical components O' shown in fig. 7A and 7B).
As shown in fig. 2, the external light L may pass through the opening 12 along the X-axis direction and enter the accommodating space 11 of the image capturing module P, and be reflected by the prism 20. The reflected external light L may pass through the optical element disposed on the optical element driving mechanism 40 substantially along the Z-axis direction, and finally reach the photosensitive element 30. The light sensing element 30 can image the external light L after being captured by the light sensing element 30.
Fig. 3 is an exploded view of the optical element driving mechanism 40 and the optical element O carried thereon according to an embodiment of the present invention. As shown in the figure, the optical assembly driving mechanism 40 mainly includes a movable portion 100, a fixed portion 200, a plurality of elastic assemblies 300, a plurality of suspension loop wires 400, a driving module 500, and two position detecting assemblies 600.
The movable portion 100 may include a carrying element 110 for carrying the optical element O. The fixing portion 200 may include a top cover 210, a bottom cover 220, and a circuit board 230, wherein the top cover 210 and the bottom cover 220 may be combined to form a hollow case, and the circuit board 230 may be disposed on the bottom cover 220. The elastic member 300 connects the hollow case and the bearing member 110 to suspend the bearing member 110 in the hollow case. The suspension loop wire 400 connects the circuit board 230 and the elastic member 300. Since the spring element 300 and the suspension wire 400 both comprise metallic materials (e.g., copper or alloys thereof, etc.), both can be used as conductors. For example, the circuit board 230 may direct current into the driving module 500 through the suspension loop wire 400 and the elastic member 300.
The specific structures of the driving module 500 and the position detecting assembly 600 in the present embodiment are described below. It should be noted that, for ease of understanding, only the relative positions of the optical assembly O, the driving module 500, the position detecting assembly 600 and/or the photosensitive assembly 30 are shown in fig. 4A to 4E, and the remaining components are omitted and not shown.
Referring to fig. 3 and fig. 4A together, in the present embodiment, the driving module 500 includes a first electromagnetic driving component 510, a second electromagnetic driving component 520, a third electromagnetic driving component 530, a fourth electromagnetic driving component 540, a fifth electromagnetic driving component 550 and a sixth electromagnetic driving component 560.
In the X-axis direction, the first, third, and fifth electromagnetic driving assemblies 510, 530, and 550 are located at one side of the optical assembly O, and the second, fourth, and sixth electromagnetic driving assemblies 520, 540, and 560 are located at the other side of the optical assembly O. That is, the optical axis a of the optical assembly O may be located between the first electromagnetic driving assembly 510 and the second electromagnetic driving assembly 520, between the third electromagnetic driving assembly 530 and the fourth electromagnetic driving assembly 540, and between the fifth electromagnetic driving assembly 550 and the sixth electromagnetic driving assembly 560.
The first electromagnetic driving assembly 510 includes a first electromagnetic driving member 511 and a first electromagnetic driving element 512, which are respectively fixed to the circuit board 230 and the carrier assembly 110. The first electromagnetic driving member 511 may be, for example, a driving coil, and the first electromagnetic driving element 512 may be, for example, a magnetic component, wherein the magnetic force lines in the first electromagnetic driving element 512 are parallel to the optical axis a of the optical component O. Accordingly, when an electric current flows through the first electromagnetic driving member 511, an electromagnetic action generated between the first electromagnetic driving member 511 and the first electromagnetic driving element 512 may provide a driving force parallel to the optical axis a, causing the first electromagnetic driving element 512 to move relative to the first electromagnetic driving member 511.
The second electromagnetic driving assembly 520 includes a second electromagnetic driving member 521 and a second electromagnetic driving element 522, which are respectively fixed to the circuit board 230 and the carrier assembly 110. The second electromagnetic driving member 521 may be, for example, a driving coil, and the second electromagnetic driving element 522 may be, for example, a magnetic component, where the direction of magnetic lines of force in the second electromagnetic driving element 522 is parallel to the optical axis a of the optical component O. Thus, when an electric current flows through the second electromagnetic driving member 521, an electromagnetic action generated between the second electromagnetic driving member 521 and the second electromagnetic driving element 522 may provide a driving force parallel to the optical axis a, causing the second electromagnetic driving element 522 to move relative to the second electromagnetic driving member 521.
It should be noted that, in the present embodiment, the first electromagnetic driving element 510 and the second electromagnetic driving element 520 are electrically independent from each other, so that the same or different currents can be provided to the first electromagnetic driving element 512 and the second electromagnetic driving element 522.
With continued reference to fig. 3 and 4A, the third electromagnetic driving assembly 530 includes a third electromagnetic driving member 531 and a third electromagnetic driving element 532 respectively fixed to the circuit board 230 and the carrier assembly 110. The third electromagnetic driving member 531 may be, for example, a driving coil, and the third electromagnetic driving element 532 may be, for example, a magnetic component, wherein the magnetic force lines in the third electromagnetic driving element 532 are parallel to the optical axis a of the optical component O. Accordingly, when an electric current flows through the third electromagnetic driving member 531, an electromagnetic action generated between the third electromagnetic driving member 531 and the third electromagnetic driving element 532 may provide a driving force parallel to the optical axis a, causing the third electromagnetic driving element 532 to move relative to the third electromagnetic driving member 531.
In the present embodiment, the third electromagnetic driving member 531 is electrically connected to the first electromagnetic driving member 511, and the line between the center of the first electromagnetic driving component 510 and the center of the third electromagnetic driving component 530 is substantially parallel to the optical axis a of the optical component O. In addition, the magnetic flux direction in the third electromagnetic driving element 532 is opposite to the magnetic flux direction in the first electromagnetic driving element 512, so as to reduce interference between the two.
The fourth electromagnetic driving assembly 540 includes a fourth electromagnetic driving member 541 and a fourth electromagnetic driving element 542, which are respectively fixed to the circuit board 230 and the carrier assembly 110. The fourth electromagnetic driving member 541 can be, for example, a driving coil, and the fourth electromagnetic driving element 542 can be, for example, a magnetic component, wherein the magnetic force line direction in the fourth electromagnetic driving element 542 is parallel to the optical axis a of the optical component O. Accordingly, when a current flows through the fourth electromagnetic driving member 541, an electromagnetic action generated between the fourth electromagnetic driving member 541 and the fourth electromagnetic driving element 542 may provide a driving force parallel to the optical axis a, causing the fourth electromagnetic driving element 542 to move relative to the fourth electromagnetic driving member 541.
Similarly, the fourth electromagnetic driving member 541 is electrically connected to the second electromagnetic driving member 521, and the line between the center of the second electromagnetic driving assembly 520 and the center of the fourth electromagnetic driving assembly 540 is substantially parallel to the optical axis a of the optical assembly O. The direction of the magnetic field lines in the fourth electromagnetic drive member 542 is opposite to the direction of the magnetic field lines in the second electromagnetic drive member 522 to reduce interference therebetween.
It should be appreciated that because the first, second, third, and fourth electromagnetic driving members 511, 521, 531, 541 are fixed to the fixed portion 200, and the first, second, third, and fourth electromagnetic driving elements 512, 522, 532, 542 are fixed to the movable portion 100, the movable portion 100 can move relative to the fixed portion 200 at the same time when the electromagnetic action is generated between the electromagnetic driving members and the electromagnetic driving assembly.
Referring to fig. 4C, when the driving force F1 provided by the first and third electromagnetic driving assemblies 510 and 530 is equal to the driving force F2 provided by the second and fourth electromagnetic driving assemblies 520 and 540, the movable portion 100/optical assembly O can move along the Z-axis relative to the fixed portion 200/photosensitive assembly 30, so as to achieve the purpose of adjusting the focal length.
Referring to fig. 4D and 4E, when the optical assembly O is askew relative to the photosensitive assembly 30 (e.g., assembly error or collision of the image capturing module P), the driving force F1 provided by the first and third electromagnetic driving assemblies 510 and 530 can be different from the driving force F2 provided by the second and fourth electromagnetic driving assemblies 520 and 540. In this way, the movable portion 100/the optical element O can rotate around a rotation axis R, so that the optical axis a of the optical element O is perpendicular to the photosensitive element 30. The aforementioned rotation axis R is perpendicular to the optical axis a of the optical assembly O.
In the present embodiment, the optical element driving mechanism 40 has a rectangular structure, and the first, second, third and fourth electromagnetic driving elements 510, 520, 530 and 540 are respectively adjacent to four corners of the rectangular structure to provide uniform driving force to the movable portion 100.
Referring back to fig. 3 and 4A, the fifth electromagnetic driving assembly 550 includes a fifth electromagnetic driving member 551 and a fifth electromagnetic driving element 552, which are respectively fixed to the top cover 210 and the carrier assembly 110. The fifth electromagnetic driving member 551 may be, for example, a magnetic component, and the fifth electromagnetic driving element 552 may be, for example, a driving coil, wherein the magnetic force lines in the fifth electromagnetic driving member 551 are perpendicular to the optical axis a of the optical component O and the rotation axis R. Thus, when an electric current flows through fifth electromagnetic drive element 552, an electromagnetic action generated between fifth electromagnetic drive member 551 and fifth electromagnetic drive element 552 may provide a driving force perpendicular to optical axis a, causing fifth electromagnetic drive member 551 to move in an axial direction (X-axis) with respect to fifth electromagnetic drive element 552. The movable portion 100 can thus move along the axial direction (X-axis) with respect to the fixed portion 200, thereby achieving the purpose of shake compensation. It should be noted that the aforementioned axial direction is perpendicular to the optical axis a and the rotation axis R.
Likewise, the sixth electromagnetic drive assembly 560 includes a sixth electromagnetic drive member 561 and a sixth electromagnetic drive element 562 that are secured to the top cover 210 and the carrier assembly 110, respectively. The sixth electromagnetic driving member 561 may be, for example, a magnetic component, and the sixth electromagnetic driving element 562 may be, for example, a driving coil, wherein the magnetic force lines in the sixth electromagnetic driving member 561 are perpendicular to the optical axis a of the optical component O and the rotation axis R. Accordingly, when an electric current flows through the sixth electromagnetic drive element 562, an electromagnetic action generated between the sixth electromagnetic drive member 561 and the sixth electromagnetic drive element 562 may provide a driving force perpendicular to the optical axis a, moving the sixth electromagnetic drive member 561 in the axial direction (X-axis) with respect to the sixth electromagnetic drive element 562. The movable portion 100 can thus move along the axial direction (X-axis) relative to the fixed portion 200, thereby achieving the purpose of shake compensation. The axial direction is perpendicular to the optical axis a and the rotation axis R.
In the present embodiment, when viewed along the optical axis a of the optical element O, the first, second, third and fourth electromagnetic driving elements 510, 520, 530, 540 are located at one side of the movable portion 100, and the fifth and sixth electromagnetic driving elements 550, 560 are located at the other side of the movable portion 100. The first, second, third, and fourth electromagnetic driving assemblies 510, 520, 530, 540 partially overlap the optical assembly O when viewed in a direction perpendicular to the optical axis a (Y-axis) of the optical assembly O, so that the overall size of the optical assembly driving mechanism 40 is reduced.
As shown in fig. 3 and 4A, one of the position detecting assemblies 600 is disposed between the first electromagnetic driving assembly 510 and the third electromagnetic driving assembly 530, and the other is disposed between the second electromagnetic driving assembly 520 and the fourth electromagnetic driving assembly 540. Each position detecting assembly 600 includes a detector 610 and a sensed object 620 corresponding to each other, wherein the detector 610 is disposed on the circuit board 230. The object 620 is disposed on the carrier 110.
The detector 610 may determine the position of the movable portion 100 with respect to the fixed portion 200 by detecting the displacement of the sensed object 620. For example, the detector 610 may be a Hall effect Sensor (Hall Sensor), a magneto-resistive effect Sensor (Magnetoresistance Effect Sensor, MR Sensor), a giant magneto-resistive effect Sensor (Giant Magnetoresistance Effect Sensor, GMR Sensor), a tunneling magneto-resistive effect Sensor (Tunneling Magnetoresistance Effect Sensor, TMR Sensor) or a magnetic flux Sensor (Fluxgate), and the object 620 may be a magnet.
In the present embodiment, the magnetic lines of force in one of the objects 620 are parallel to the optical axis a of the optical element O, and the position detecting element 600 having the object 620 can detect the position of the movable portion 100 relative to the fixed portion 200 in the Z-axis direction. The magnetic lines of force in the other object 620 are perpendicular to the optical axis a of the optical element O, and the position detecting element 600 with the object 620 can detect the position of the movable portion 100 relative to the fixed portion 200 in the X-axis and/or Y-axis directions. In other words, by the aforementioned position detecting assembly 600, the angular variation between the movable portion 100 and the fixed portion 200 can be obtained.
In some embodiments, the optical device driving mechanism 40 may include only one position detecting device 600, and the detector 610 in the position detecting device 600 may directly detect the angular change between the detector 610 and the object 620.
Since the first, second, third, and fourth electromagnetic driving assemblies 510, 520, 530, 540 can rotate the optical assembly O relative to the photosensitive assembly 30, in some embodiments, the fifth electromagnetic driving assembly 550 and the sixth electromagnetic driving assembly 560 will be omitted, and the shake compensation can be achieved by using this rotation. In this way, the thickness of the optical assembly driving mechanism 40 in the Y-axis direction can be reduced, which is advantageous for miniaturization of the image capturing module P and the electronic device E.
Referring to fig. 5A and 5B, in another embodiment of the present invention, the optical element driving mechanism 40 may omit the third electromagnetic driving element 530 and the fourth electromagnetic driving element 540, and only use the driving forces provided by the first electromagnetic driving element 510 and the second electromagnetic driving element 520 to move the movable portion 100 along the Z-axis and rotate about the rotation axis R relative to the fixed portion 200. It should be noted that, in this embodiment, each position detecting assembly 600 may include only one detector 610, and the detector 610 may be surrounded by the driving coils (the first electromagnetic driving member 511 and the second electromagnetic driving member 521) and detect the displacement of the first electromagnetic driving element 512 and the second electromagnetic driving element 522 as the sensed object.
Referring to fig. 6A to 6D, in another embodiment of the present invention, the fifth electromagnetic driving assembly 550 includes a fifth electromagnetic driving member 551 and two fifth electromagnetic driving elements 552', 552", and the sixth electromagnetic driving assembly 560 includes a sixth electromagnetic driving member 561 and two sixth electromagnetic driving elements 562', 562" (the structures of the first, second, third and fourth electromagnetic driving assemblies 510, 520, 530 and 540 are the same as those of the previous embodiments, and thus are not repeated herein).
The two fifth electromagnetic driving elements 552', 552 "are arranged in the direction of the optical axis a, the two sixth electromagnetic driving elements 562', 562" are also arranged in the direction of the optical axis a, and in the X-axis direction, the fifth electromagnetic driving elements 552', 552 "are aligned with the sixth electromagnetic driving elements 562', 562", respectively. It should be noted that, the fifth electromagnetic driving element 552' is electrically connected to the sixth electromagnetic driving element 562', the fifth electromagnetic driving element 552 "is electrically connected to the sixth electromagnetic driving element 562", and the fifth electromagnetic driving element 552' is electrically independent of the fifth electromagnetic driving element 552".
Thus, by supplying the same or different magnitudes of electric current to the fifth and sixth electromagnetic driving elements 552', 562' and the fifth and sixth electromagnetic driving elements 552", 562", the movable portion 100/optical assembly O can be moved in the X-axis direction (fig. 6B) or rotated about the rotation axis R (fig. 6C and 6D).
Because the foregoing structure including the two fifth electromagnetic drive elements 552', 552 "and the two sixth electromagnetic drive elements 562', 562" may utilize the supply of currents of differing magnitudes to the fifth and sixth electromagnetic drive elements 552', 562' and the fifth and sixth electromagnetic drive elements 552", 562" to rotate the movable portion 100/optical assembly O, in some embodiments, the first, second, third, and fourth electromagnetic drive assemblies 510, 520, 530, 540 may be integrated into a single electromagnetic drive assembly or electromagnetic drive assemblies that are serially connected to one another.
Referring to fig. 7A to 7C, in another embodiment of the invention, the carrying element 110 in the camera module P can be replaced by a carrying element 110', and the carrying element 110' can carry the optical element O '. The optical component O' is a lens, and at least includes a first lens O1 adjacent to the light incident end E1 and a second lens O2 adjacent to the light emitting end E2, wherein the first lens O1 is larger than the second lens O2.
The carrier 110' has a surface 111', and when the optical element O ' is mounted on the carrier 110', the surface 111' faces the light incident end E1 and the first lens O1. The carrier assembly 110' may further have a plurality of adhesive grooves 112' formed on both sides of the optical assembly O '. The glue grooves 112 'are located between the short sides of the rectangular structure of the camera module P and the optical component O', and can be filled with an adhesive component (not shown) to fix the optical component O 'on the carrier component 110'. In addition, the carrier element 110' is also formed with a glue groove 113' near the light emitting end E2, and an adhesive element (not shown) may be filled in to fix the optical element O ' more firmly.
In summary, the present invention provides an optical component driving mechanism for driving an optical component, which includes a fixed portion, a movable portion, and a driving module. The movable part can bear the optical component, and the driving module can drive the movable part to rotate around a rotation axis relative to the fixed part, wherein the rotation axis is different from the optical axis of the optical component. The driving module comprises a first electromagnetic driving assembly and a second electromagnetic driving assembly. The optical axis is located between the first electromagnetic driving component and the second electromagnetic driving component, and the first electromagnetic driving component and the second electromagnetic driving component are located on one side of the movable portion. The first electromagnetic driving assembly and the second electromagnetic driving assembly are electrically independent.
The invention also provides an image pickup device which comprises an optical assembly, a fixed part, a movable part and a driving module. The movable part can bear the optical component, and the driving module can drive the movable part to move relative to the fixed part. The optical component is provided with a first lens and a second lens, wherein the first lens is closer to the light incident end of the optical component than the second lens, and the first lens is larger than the second lens.
Although embodiments of the present invention and their advantages have been disclosed above, it should be understood that those skilled in the art may make modifications, substitutions and alterations herein without departing from the spirit and scope of the invention. Furthermore, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification, unless a person skilled in the art would appreciate from the present disclosure that the processes, machine, manufacture, composition of matter, means, methods and steps are capable of performing substantially the same function or obtaining substantially the same result as the described embodiments. Accordingly, the scope of the present application includes such processes, machines, manufacture, compositions of matter, means, methods, or steps. In addition, each claim constitutes a separate embodiment, and the scope of the invention also includes combinations of the individual claims and embodiments.
While the invention has been described with reference to certain preferred embodiments, it is not intended to be limiting. Those skilled in the art will appreciate that many modifications and variations may be made without departing from the spirit and scope of the invention. The scope of the invention is therefore defined in the appended claims. Furthermore, each claim is to be construed as a separate embodiment, and various claims and combinations of embodiments are intended to be within the scope of the invention.

Claims (10)

1. An optical assembly driving mechanism for driving an optical assembly, comprising:
a fixing part comprising a circuit board;
a movable part for carrying the optical component; and
the driving module drives the movable part to rotate around a rotation axis relative to the fixed part, wherein the rotation axis is different from an optical axis of the optical assembly, and the circuit board is positioned at one side of the movable part when the circuit board is observed along the optical axis direction, and the driving module comprises:
the first electromagnetic driving component comprises a first electromagnetic driving element and a first electromagnetic driving member, wherein the first electromagnetic driving element is a magnetic element, the first electromagnetic driving member is a driving coil, the first electromagnetic driving member is fixed on the circuit board, and the first electromagnetic driving element is arranged on the movable part; and
the second electromagnetic driving component comprises a second electromagnetic driving element and a second electromagnetic driving member, wherein the second electromagnetic driving element is a magnetic element, the second electromagnetic driving member is a driving coil, the second electromagnetic driving member is fixed on the circuit board, and the second electromagnetic driving element is arranged on the movable part; when the first electromagnetic driving component and the second electromagnetic driving component are observed along the optical axis direction, the first electromagnetic driving component and the second electromagnetic driving component are positioned on one side of the movable part, which is adjacent to the circuit board, and the arrangement direction of the first electromagnetic driving element and the first electromagnetic driving component is parallel to the arrangement direction of the second electromagnetic driving element and the second electromagnetic driving component, wherein the optical axis is positioned between the first electromagnetic driving component and the second electromagnetic driving component, and the first electromagnetic driving component and the second electromagnetic driving component are electrically independent.
2. The optical component driving mechanism according to claim 1, wherein the first electromagnetic driving component, the second electromagnetic driving component and the optical component partially overlap when viewed in a direction perpendicular to the optical axis.
3. The optical device driving mechanism according to claim 1, wherein the optical device driving mechanism has a rectangular structure, and the first electromagnetic driving device and the second electromagnetic driving device are adjacent to corners of the rectangular structure, respectively.
4. The optical assembly driving mechanism according to claim 1, wherein the optical assembly driving mechanism further comprises two detectors for sensing an angular change of the movable portion and the fixed portion.
5. The optical assembly driving mechanism according to claim 4, wherein two of the detectors correspond to the first electromagnetic driving assembly and the second electromagnetic driving assembly, respectively.
6. The optical assembly drive mechanism of claim 1, wherein the drive module further comprises:
the third electromagnetic driving assembly is electrically connected with the first electromagnetic driving assembly; and
and the fourth electromagnetic driving assembly is electrically connected with the second electromagnetic driving assembly, wherein the optical axis is positioned between the third electromagnetic driving assembly and the fourth electromagnetic driving assembly, and the third electromagnetic driving assembly and the fourth electromagnetic driving assembly are positioned at one side of the movable part adjacent to the circuit board when the optical axis is seen in the direction of the optical axis.
7. The optical assembly driving mechanism according to claim 6, wherein the optical assembly driving mechanism further comprises two position detecting assemblies respectively disposed between the first electromagnetic driving assembly and the third electromagnetic driving assembly and between the second electromagnetic driving assembly and the fourth electromagnetic driving assembly.
8. The optical element driving mechanism according to claim 1, further comprising a fifth electromagnetic driving element for driving the movable portion to move in an axial direction relative to the fixed portion, wherein the fifth electromagnetic driving element is disposed on the opposite side of the movable portion from the first electromagnetic driving element and the second electromagnetic driving element, and the axial direction is perpendicular to the rotation axis and the optical axis.
9. The optical assembly driving mechanism according to claim 8, wherein the optical assembly driving mechanism further comprises a sixth electromagnetic driving assembly, the optical axis being located between the fifth electromagnetic driving assembly and the sixth electromagnetic driving assembly.
10. The optical module driving mechanism according to claim 9, wherein the fifth electromagnetic driving module includes two fifth electromagnetic driving elements and a fifth electromagnetic driving member, and the sixth electromagnetic driving module includes two sixth electromagnetic driving elements and a sixth electromagnetic driving member, wherein the two fifth electromagnetic driving elements are arranged along the optical axis direction, and the two sixth electromagnetic driving elements are arranged along the optical axis direction.
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US15/977,427 US10887498B2 (en) 2017-05-12 2018-05-11 Optical member driving mechanism and camera device
US17/113,786 US11509801B2 (en) 2017-05-12 2020-12-07 Optical mechanism
US17/114,025 US11627241B2 (en) 2017-05-12 2020-12-07 Optical mechanism
US17/974,955 US20230038826A1 (en) 2017-05-12 2022-10-27 Optical mechanism

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CN108873234A (en) 2018-11-23
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CN208766376U (en) 2019-04-19
CN108873228A (en) 2018-11-23

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