Patent Publication Number: US-2022221640-A1

Title: Optical element driving mechanism

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application claims the benefit of U.S. Provisional Application No. 63/135,402, filed on Jan. 8, 2021, the entirety of which is incorporated by reference herein. 
    
    
     BACKGROUND OF THE DISCLOSURE 
     Field of the Disclosure 
     The present disclosure relates to an optical element driving mechanism, and in particular it relates to an optical element driving mechanism with a polarizer. 
     Description of the Related Art 
     As technology has developed, it has become more common to include image-capturing and video-recording functions into many types of modern electronic devices, such as smartphones and digital cameras. These electronic devices are used more and more often, and new models have been developed that are convenient, thin, and lightweight, offering more choices for consumers. 
     BRIEF SUMMARY OF THE DISCLOSURE 
     According to some embodiments of the disclosure, the present disclosure provides an optical element driving mechanism, which includes a movable part, a fixed assembly, and a driving assembly. The movable part is configured to be connected to an optical element. The movable part is movable relative to the fixed assembly. The driving assembly is configured to drive the movable part to move relative to the fixed assembly. The movable part includes a connecting assembly configured to position the optical element. 
     According to some embodiments, a light beam travels along an optical axis to pass through the optical element and a first opening of the fixed assembly. The driving assembly is configured to drive the movable part to rotate around a rotating axis. The rotating axis is parallel to the optical axis. 
     According to some embodiments, the optical element has a plate-shaped structure. The optical element has a light-transmissible material. The optical element includes a polarizer. The optical element has an identification structure corresponding to the connection assembly. When viewed along the optical axis, the optical element includes a first side parallel to a first axis, and a second side parallel to a second axis. The first axis is perpendicular to the second axis. When viewed along the optical axis, the identification structure has a recessed structure. 
     According to some embodiments, the identification structure is located between the first side and the second side. When viewed along the optical axis, the identification structure has a hypotenuse, which is not parallel to the first side and the second side. When viewed along the optical axis, the included angle between the hypotenuse and the first side is different from the included angle between the hypotenuse and the second side. When viewed along the optical axis, the included angle between the hypotenuse and the first side is between 140 degrees and 175 degrees. 
     According to some embodiments, the connecting assembly includes a first connecting element that corresponds to the optical element, a second connecting element that corresponds to the optical element, and a third connecting element that corresponds to the optical element. The first connecting element has a recessed structure. The second connecting element has a recessed structure. The third connecting element has a recessed structure. 
     According to some embodiments, when viewed along the optical axis, the optical element further includes a third side, which is parallel to the second axis. The first connecting element is disposed between the first side and the hypotenuse. The second connecting element is disposed between the second side and the hypotenuse. The third connecting element is disposed between the first side and the third side. When viewed along the optical axis, the optical element has a polygonal structure. 
     According to some embodiments, when viewed along the optical axis, the first connecting element is located between the second connecting element and the third connecting element. When viewed along the optical axis, the shortest distance between the first connecting element and the second connecting element is different from the shortest distance between the first connecting element and the third connecting element. 
     According to some embodiments, the optical element driving mechanism further includes a first adhesive element, a second adhesive element, and a third adhesive element. The optical element is fixedly connected to the movable part by the first adhesive element. The optical element is fixedly connected to the movable part by the second adhesive element. The optical element is fixedly connected to the movable part by the third adhesive element. The first adhesive element is disposed in the first connecting element. The first adhesive element is in direct contact with the first side. The first adhesive element is in direct contact with the hypotenuse. The second adhesive element is disposed in the second connecting element. The second adhesive element is in direct contact with the second side. The second adhesive element is in direct contact with the hypotenuse. 
     According to some embodiments, the third adhesive element is disposed in the third connecting element. The third adhesive element is in direct contact with the third side. The third adhesive element is in direct contact with the first side. There is a gap between the first adhesive element and the third adhesive element. The first adhesive element and the second adhesive element are integrally formed. 
     According to some embodiments, the fixed assembly includes an outer frame and a base. The outer frame has a top wall with a plate-shaped structure. The base forms an accommodating space with the outer frame to accommodate the movable part. The first opening is formed on the base. The fixed assembly further includes a second opening formed on the top wall. The light beam enters the optical element driving mechanism and is configured to sequentially pass through the second opening, the optical element, and the first opening. 
     According to some embodiments, when viewed along the optical axis, a maximum size of the first opening is different from a maximum size of the second opening. When viewed along the optical axis, the maximum size of the first opening is greater than the maximum size of the second opening. The movable part has a receiving structure configured to receive the optical element. The top wall has a top wall surface facing the movable part. The top wall surface faces the optical element. The shortest distance between the movable part and the top wall surface is less than the shortest distance between the optical element and the top wall surface. 
     According to some embodiments, the optical element driving mechanism further includes a restricting assembly configured to restrict the movable part to rotate within an extreme motion range relative to the fixed assembly. The extreme motion range is greater than 90 degrees. The restricting assembly includes a protruding portion and a recessed portion. The protruding portion and the movable part are integrally formed as one piece. The recessed portion corresponds to the protruding portion and has a first blocking surface and a second blocking surface. When the movable part is located in a first extreme position relative to the fixed assembly, the protruding portion is in direct contact with the first blocking surface. When the movable part is located in a second extreme position relative to the fixed assembly, the protruding portion is in direct contact with the second blocking surface. An included angle formed by the first blocking surface and the second blocking surface is not 90 degrees. 
     According to some embodiments, the light beam is incident on an optical module after passing through the optical element driving mechanism. The optical element driving mechanism is configured to be installed in an electronic apparatus. The electronic apparatus includes a protection element, and the light beam is incident on the optical element after passing through the protection element. The protection element has a light-transmissible material. 
     According to some embodiments, the optical element driving mechanism further includes a control assembly configured to control the driving assembly to drive the movable part to be in a first position or a second position relative to the fixed assembly. The angle between the first position and the second position is 90 degrees. 
     According to some embodiments, the first position is different from the first extreme position and the second extreme position. The second position is different from the first extreme position and the second extreme position. When the movable part is located in the first position, the protruding portion does not contact the recessed portion. When the movable part is located in the second position, the protruding portion does not contact the recessed portion. 
     According to some embodiments, the driving assembly includes: a first coil; a second coil; and a magnetic element. The first coil includes: a first section, having a linear structure; and a second section, having a linear structure. When viewed along the optical axis, the included angle between the first section and the second section is greater than 90 degrees. The second coil includes: a third section, having a linear structure; and a fourth section, having a linear structure. When viewed along the optical axis, the included angle between the third section and the fourth section is greater than 90 degrees. 
     According to some embodiments, the first coil is electrically connected to the second coil. When a current enters the driving assembly and when viewed along the optical axis, a current direction of the first coil is opposite to a current direction of the second coil. The magnetic element includes: a first magnetic pole pair, including a first north pole and a first south pole; and a second magnetic pole pair, including a second north pole and a second south pole. An arrangement direction of the first north pole and the first south pole is parallel to the optical axis. The first north pole faces the first section. The first north pole faces the third section. 
     According to some embodiments, an arrangement direction of the second north pole and the second south pole is parallel to the optical axis. The second south pole faces the second section. The second south pole faces the fourth section. The arrangement direction of the first north pole and the first south pole is opposite to the arrangement direction of the second north pole and the second south pole. 
     According to some embodiments, when the movable part is located in any position within the extreme motion range and when viewed along the optical axis, the first section remains partially overlapping the first magnetic pole pair. When the movable part is located in any position within the extreme motion range and when viewed along the optical axis, the third section remains partially overlapping the first magnetic pole pair. When the movable part is located in any position within the extreme motion range and when viewed along the optical axis, the first section and the second magnetic pole pair remain non-overlapping. When the movable part is located in any position within the extreme motion range and when viewed along the optical axis, the third section and the second magnetic pole pair remain non-overlapping. 
     According to some embodiments, when the movable part is located in any position within the extreme motion range and when viewed along the optical axis, the second section remains partially overlapping the second magnetic pole pair. When the movable part is located in any position within the extreme motion range and when viewed along the optical axis, the fourth section remains partially overlapping the second magnetic pole pair. When the movable part is located in any position within the extreme motion range and when viewed along the optical axis, the second section and the first magnetic pole pair remain non-overlapping. When the movable part is located in any position within the extreme motion range and when viewed along the optical axis, the fourth section and the first magnetic pole pair remain non-overlapping. The first magnetic pole pair and the second magnetic pole pair are integrally formed in one piece. 
     The present disclosure provides an optical element driving mechanism, including a movable part, a fixed assembly, and a driving assembly. The movable part is movable relative to fixed assembly. The driving assembly is configured to drive the movable part to move relative to the fixed assembly. A receiving structure is formed on the movable part, which is configured to receive the optical element, and the optical element has an identification structure, so that the optical element can be quickly positioned on the movable part. 
     The movable part also includes a connecting assembly configured to position the optical element. The connecting assembly includes multiple connecting elements, which are communicated with the receiving structure. For example, each of the connecting elements has an arc-shaped groove, and multiple adhesive elements can be respectively disposed in the connecting elements and configured to fix the optical element on the movable part. Based on the design of this disclosure, it can be ensured that when the optical element driving mechanism is impacted, the optical element can be stably fixed on the movable part. 
     Additional features and advantages of the disclosure will be set forth in the description which follows, and, in part, will be obvious from the description, or can be learned by practice of the principles disclosed herein. The features and advantages of the disclosure can be realized and obtained by means of the instruments and combinations pointed out in the appended claims. These and other features of the disclosure will become more fully apparent from the following description and appended claims, or can be learned by the practice of the principles set forth herein. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Aspects of the present disclosure are best understood from the following detailed description when read with the accompanying figures. It is noted that, in accordance with the standard practice in the industry, various features are not drawn to scale. In fact, the dimensions of the various features may be arbitrarily increased or reduced for clarity of discussion. 
         FIG. 1  shows a schematic diagram of an optical element driving mechanism  100  according to an embodiment of the present disclosure. 
         FIG. 2  shows an exploded diagram of the optical element driving mechanism  100  according to the embodiment of the present disclosure. 
         FIG. 3  shows a cross-sectional view of the optical element driving mechanism  100  along line A-A in  FIG. 1  according to the embodiment of the present disclosure. 
         FIG. 4  is a top view of a partial structure of the optical element driving mechanism  100  according to an embodiment of the present disclosure. 
         FIG. 5  is an enlarged view of  FIG. 3  according to an embodiment of the present disclosure. 
         FIG. 6  is a top view of the movable part  108  at a first position P 1  according to an embodiment of the present disclosure. 
         FIG. 7  is a top view of the movable part  108  at a second position P 2  according to an embodiment of the present disclosure. 
         FIG. 8  is a bottom view of the movable part  108  at the first position according to an embodiment of the present disclosure. 
         FIG. 9  is a bottom view of the movable part  108  at the second position according to an embodiment of the present disclosure. 
         FIG. 10  is a schematic cross-sectional view of the optical element driving mechanism  100  installed in an electronic apparatus  50  according to an embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION OF THE ILLUSTRATIVE EMBODIMENTS 
     The following disclosure provides many different embodiments, or examples, for implementing different features of the provided subject matter. Specific examples of components and arrangements are described below to simplify the present disclosure. These are, of course, merely examples and are not intended to be limiting. For example, the formation of a first feature over or on a second feature in the description that follows may include embodiments in which the first and second features are in direct contact, and may also include embodiments in which additional features may be disposed between the first and second features, such that the first and second features may not be in direct contact. 
     In addition, the present disclosure may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. Moreover, the formation of a feature on, connected to, and/or coupled to another feature in the present disclosure that follows may include embodiments in which the features are in direct contact, and may also include embodiments in which additional features may be disposed interposing the features, such that the features may not be in direct contact. In addition, spatially relative terms, for example, “vertical,” “above,” “over,” “below,”, “bottom,” etc. as well as derivatives thereof (e.g., “downwardly,” “upwardly,” etc.) are used in the present disclosure for ease of description of one feature&#39;s relationship to another feature. The spatially relative terms are intended to cover different orientations of the device, including the features. 
     Unless defined otherwise, all 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 should be appreciated that each term, which is defined in a commonly used dictionary, should be interpreted as having a meaning conforming to the relative skills and the background or the context of the present disclosure, and should not be interpreted in an idealized or overly formal manner unless defined otherwise. 
     Use of ordinal terms such as “first”, “second”, etc., in the claims to modify a claim element does not by itself connote any priority, precedence, or order of one claim element over another or the temporal order in which acts of a method are performed, but are used merely as labels to distinguish one claim element having a certain name from another element having the same name (but for use of the ordinal term) to distinguish the claim elements. 
     In addition, in some embodiments of the present disclosure, terms concerning attachments, coupling and the like, such as “connected” and “interconnected”, refer to a relationship wherein structures are secured or attached to one another either directly or indirectly through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise. 
     Please refer to  FIG. 1  to  FIG. 3 .  FIG. 1  shows a schematic diagram of an optical element driving mechanism  100  according to an embodiment of the present disclosure,  FIG. 2  shows an exploded diagram of the optical element driving mechanism  100  according to the embodiment of the present disclosure, and  FIG. 3  shows a cross-sectional view of the optical element driving mechanism  100  along line A-A in  FIG. 1  according to the embodiment of the present disclosure. The optical element driving mechanism  100  can be an optical module and can be configured to hold and drive an optical element. The optical element driving mechanism  100  can be installed in different electronic devices or portable electronic devices, such as a smartphone, for allowing a user to perform the image adjustment function. 
     In this embodiment, the optical element driving mechanism  100  may include a fixed assembly FA, a movable assembly MA, and a driving assembly DA. The movable assembly MA is movably connected to the fixed assembly FA. The driving assembly DA is configured to drive the movable assembly MA to move relative to the fixed assembly FA. 
     In this embodiment, as shown in  FIG. 2 , the fixed assembly FA includes an outer frame  102  and a base  112 . The outer frame  102  includes a top wall  102 T having a plate-shaped structure. The base  112  and the outer frame  102  form an accommodating space AS configuration to accommodate the movable part  108  and the driving assembly DA ( FIG. 3 ). 
     The movable assembly MA may include a movable part  108  and an optical element  107 , and the movable part  108  is configured to be connected to the optical element  107 . The movable part  108  is movable relative to the fixed assembly FA, and the driving assembly DA is configured to drive the movable part  108  and the optical element  107  to move relative to the fixed assembly FA. 
     The optical element  107  may have a plate-shaped structure, and the optical element  107  may have a light-transmissible material. For example, the optical element  107  can be a polarizer, but it is not limited thereto. In other embodiments, the optical element  107  may be an optical filter such as a gradient mirror or a star mount mirror. 
     As shown in  FIG. 2 , a light beam L can travel along an optical axis O to pass through the optical element  107  and a first opening OP 1  of the fixed assembly FA, and then is received by an optical module  150  under the optical element driving mechanism  100  to generates a digital image signal. The first opening OP 1  is formed on the base  112 . 
     Furthermore, the fixed assembly FA further includes a second opening OP 2  formed on the top wall  102 T. The light beam L enters the optical element driving mechanism  100  and is configured to sequentially pass through the second opening OP 2 , the optical element  107 , and the first opening OP 1 . 
     When viewed along the optical axis O, the maximum size of the first opening OP 1  is different from the maximum size of the second opening OP 2 . For example, when viewed along the optical axis O, the maximum size of the first opening OP 1  is greater than the maximum size of the second opening OP 2  ( FIG. 8 ). 
     In this embodiment, the driving assembly DA is configured to drive the movable part  108  to rotate around a rotating axis RX to adjust the polarity (phase) of the light beam L. The rotating axis RX can be parallel to and/or overlap with the optical axis O. 
     In this embodiment, the driving assembly DA may include a first coil CL 1 , a second coil CL 2 , and a magnetic element MG 1 . The magnetic element MG 1  is fixedly disposed on the bottom of the movable part  108 , and when the first coil CL 1  and the second coil CL 2  are energized, an electromagnetic driving force is generated to drive the movable part  108  to rotate around the rotating axis RX. 
     Please refer to  FIG. 1  to  FIG. 4  together.  FIG. 4  is a top view of a partial structure of the optical element driving mechanism  100  according to an embodiment of the present disclosure. As shown in  FIG. 2 , the movable part  108  has a receiving structure  108 R configured to receive the optical element  107 . Furthermore, as shown in  FIG. 4 , the movable part  108  further includes a connecting assembly CA configured to position the optical element  107 , and the optical element  107  has an identification structure RS corresponding to the connecting assembly CA. 
     When viewed along the optical axis O, the optical element  107  may have a polygonal structure. When viewed along the optical axis O, the optical element  107  may include a first side  107 S 1  and a second side  107 S 2 . The first side  107 S 1  is parallel to a first axis AX 1 , and the second side  107 S 2  is parallel to a second axis AX 2 . The first axis AX 1  is perpendicular to the second axis AX 2 . 
     When viewed along the optical axis O, the identification structure RS has a recessed structure, and the identification structure RS is located between the first side  107 S 1  and the second side  107 S 2 . When viewed along the optical axis O, the identification structure RS has a hypotenuse, which is not parallel to the first side  107 S 1  and the second side  107 S 2 . 
     When viewed along the optical axis O, the included angle between the hypotenuse and the first side  107 S 1  is different from the included angle between the hypotenuse and the second side  107 S 2 . For example, when viewed along the optical axis O, an included angle AG 1  between the hypotenuse and the first side  107 S 1  is between 140 degrees and 175 degrees. 
     In this embodiment, the connecting assembly CA may include a first connecting element CE 1 , a second connecting element CE 2 , a third connecting element CE 3 , a fourth connecting element CE 4 , and a fifth connecting element CE 5 . The first connecting element CE 1  corresponds to the optical element  107 , the second connecting element CE 2  corresponds to the optical element  107 , and the third connecting element CE 3  corresponds to the optical element  107 . Each of the first connecting element CE 1  to the fifth connecting element CE 5  has a recessed structure. 
     When viewed along the optical axis O, the optical element  107  further includes a third side  107 S 3 , which is parallel to the second axis AX 2 . The first connecting element CE 1  is disposed between the first side  107 S 1  and the hypotenuse, the second connecting element CE 2  is disposed between the second side  107 S 2  and the hypotenuse, and the third connecting element CE 3  is disposed between the first side  107 S 1  and the third side  107 S 3 . 
     When viewed along the optical axis O, the first connecting element CE 1  is located between the second connecting element CE 2  and the third connecting element CE 3 . When viewed along the optical axis O, the shortest distance between the first connecting element CE 1  and the second connecting element CE 2  is different from the shortest distance between the first connecting element CE 1  and the third connecting element CE 3 . 
     Furthermore, the optical element driving mechanism  100  may further include a first adhesive element AE 1 , a second adhesive element AE 2 , and a third adhesive element AE 3 . The optical element  107  is fixedly connected to the movable part  108  by the first adhesive element AE 1 , the optical element  107  is fixedly connected to the movable part  108  by the second adhesive element AE 2 , and the optical element  107  is fixedly connected to the movable part  108  by the third adhesive element AE 3 . 
     For example, the first adhesive element AE 1  is disposed in the first connecting element CE 1 . The first adhesive element AE 1  is in direct contact with the first side  107 S 1 , and the first adhesive element AE 1  is in direct contact with the hypotenuse. 
     The second adhesive element AE 2  is disposed in the second connecting element CE 2 . The second adhesive element AE 2  is in direct contact with the second side  107 S 2 , and the second adhesive element AE 2  is in direct contact with the hypotenuse. 
     The third adhesive element AE 3  is disposed in the third connecting element CE 3 , the third adhesive element AE 3  is in direct contact with the third side  107 S 3 , and the third adhesive element AE 3  is in direct contact with the first side  107 S 1 . 
     It is worth noting that a gap is formed between the first adhesive element AE 1  and the third adhesive element AE 3 , and the first adhesive element AE 1  and the third adhesive element AE 3  are not in contact with each other. The first adhesive element AE 1  and the second adhesive element AE 2  are integrally formed. That is, the first adhesive element AE 1  is in contact with the second adhesive element AE 2 . 
     Similarly, the optical element driving mechanism  100  may further include a fourth adhesive element AE 4  and a fifth adhesive element AE 5 , which are respectively disposed in the fourth connecting element CE 4  and the fifth connecting element CE 5 . Based on the above-mentioned first adhesive element AE 1  to fifth adhesive element AE 5 , the optical element  107  can be firmly disposed on the movable part  108 . 
     Please refer to  FIG. 5 , which is an enlarged view of  FIG. 3  according to an embodiment of the present disclosure. As shown in  FIG. 5 , the top wall  102 T has a top wall surface  102 TS facing the movable part  108 . The top wall surface  102 TS faces the optical element  107 . It is worth noting that the shortest distance DS 1  between the movable part  108  and the top wall surface  102 TS is less than the shortest distance DS 2  between the optical element  107  and the top wall surface  102 TS, so that the problem of the optical element  107  being damaged by impact can be avoided. 
     Please go back to  FIG. 4 . In this embodiment, the optical element driving mechanism  100  further includes a restricting assembly RA configured to restrict the movable part  108  to rotate within an extreme motion range EMR relative to the base  112  of the fixed assembly FA. For example, the extreme motion range EMR is greater than 90 degrees, but it is not limited to this. 
     The restricting assembly RA includes a protruding portion  108 P and a recessed portion  112 R. The protruding portion  108 P and the movable part  108  are integrally formed in one piece, and the recessed portion  112 R is formed on the base  112  corresponding to the protruding portion  108 P. The recessed portion  112 R has a first blocking surface BS 1  and a second blocking surface BS 2 . 
     As shown in  FIG. 4 , when the movable part  108  is located in a first extreme position (the leftmost position) relative to the fixed assembly FA, the protruding portion  108 P is in direct contact with the first blocking surface BS 1 . In addition, when the movable part  108  is rotated to the rightmost position, the movable part  108  is located in a second extreme position relative to the fixed assembly FA, and at this time, the protruding portion  108 P is in direct contact with the second blocking surface BS 2 . 
     The included angle formed by the first blocking surface BS 1  and the second blocking surface BS 2  is not 90 degrees. For example, the included angle formed by the first blocking surface BS 1  and the second blocking surface BS 2  is greater than 90 degrees. 
     Please refer to  FIG. 2 ,  FIG. 4 ,  FIG. 6 , and  FIG. 7 .  FIG. 6  is a top view of the movable part  108  at a first position P 1  according to an embodiment of the present disclosure, and  FIG. 7  is a top view of the movable part  108  at a second position P 2  according to an embodiment of the present disclosure. In this embodiment, the optical element driving mechanism  100  may further include a control assembly  130  configured to control the driving assembly DA to drive the movable part  108  to be in the first position P 1  or the second position P 2  relative to the fixed assembly FA. The control assembly  130  may be, for example, a control chip. 
     The optical element driving mechanism  100  further includes a sensing element SE, which is disposed on the base  112  and configured to sense the position of the movable part  108  relative to the base  112 . Specifically, the sensing element SE is configured to sense changes in the magnetic field of the magnetic element MG 1  and output a sensing signal to the control assembly  130 . 
     The sensing element SE may include a Hall sensor, a magnetoresistance effect sensor (MR sensor), a giant magnetoresistance effect sensor (GMR sensor), a tunneling magnetoresistance effect sensor (TMR sensor), or a fluxgate sensor. 
     The control assembly  130  stores a look-up table, which is composed of the position of the movable part  108  and the magnetic field code (corresponding to the sensing signal). The control assembly  130  can obtain the position of the movable part  108  relative to the base  112  according to the look-up table and the sensing signal, thereby performing closed-loop control. 
     In this embodiment, as shown in  FIG. 7 , an angle AG between the first position P 1  and the second position P 2  is 90 degrees. It should be noted that the first position P 1  in  FIG. 6  is different from the first extreme position and the second extreme position in  FIG. 4 . Similarly, the second position P 2  is different from the first extreme position and the second extreme position. 
     When the movable part  108  is located in the first position P 1 , the protruding portion  108 P does not contact the recessed portion  112 R. That is, the protruding portion  108 P is not in direct contact with the first blocking surface BS 1 . Similarly, when the movable part  108  is located in the second position P 1 , the protruding portion  108 P does not contact the recessed portion  112 R. That is, the protruding portion  108 P is not in direct contact with the second blocking surface BS 2 . 
     Please refer to  FIG. 8  to  FIG. 9 .  FIG. 8  is a bottom view of the movable part  108  at the first position according to an embodiment of the present disclosure, and  FIG. 9  is a bottom view of the movable part  108  at the second position according to an embodiment of the present disclosure. As shown in  FIG. 8 , the first coil CL 1  may include a first section SG 1  and a second section SG 2 . The first section SG 1  has a linear structure, and the second section SG 2  has a linear structure. When viewed along the optical axis O, an included angle AG 2  between the first section SG 1  and the second section SG 2  is greater than 90 degrees. 
     Similarly, the second coil CL 2  includes a third section SG 3  and a fourth section SG 4 . The third section SG 3  has a linear structure, and the fourth section SG 4  has a linear structure. When viewed along the optical axis O, an included angle AG 3  between the third section SG 3  and the fourth section SG 4  is greater than 90 degrees. 
     In this embodiment, the first coil CL 1  is electrically connected to the second coil CL 2 . When a current IC enters the driving assembly DA and when viewed along the optical axis O, the current direction of the first coil CL 1  is opposite to the current direction of the second coil CL 2 . For example, the direction of the current IC in the first coil CL 1  is clockwise, and the direction of the current IC in the second coil CL 2  is counterclockwise. 
     Please continue to refer to  FIG. 6  to  FIG. 9 . In this embodiment, the magnetic element MG 1  includes a first magnetic pole pair MPR 1  and a second magnetic pole pair MPR 2 . The first magnetic pole pair MPR 1  includes a first north pole NP 1  and a first south pole SP 1 , and the arrangement direction of the first north pole NP 1  and the first south pole SP 1  is parallel to the optical axis O (the Z-axis). The first north pole NP 1  faces the first section SG 1 , and the first north pole NP 1  faces the third section SG 3 . 
     The second magnetic pole pair MPR 2  includes a second north pole NP 2  and a second south pole SP 2 . The arrangement direction of the second north pole NP 2  and the second south pole SP 2  is parallel to the optical axis O. The second south pole SP 2  faces the second section SG 2 , and the second south pole SP 2  faces the fourth section SG 4 . It should be noted that the arrangement direction of the first north pole NP 1  and the first south pole SP 1  is opposite to the arrangement direction of the second north pole NP 2  and the second south pole SP 2 . 
     As shown in  FIG. 8  and  FIG. 9 , when the movable part  108  is located in any position within the extreme motion range EMR and when viewed along the optical axis O, the first section SG 1  remains partially overlapping the first north pole NP 1  of the first magnetic pole pair MPR 1 . 
     When the movable part  108  is located in any position within the extreme motion range EMR and when viewed along the optical axis O, the third section SG 3  remains partially overlapping the first north pole NP 1  of the first magnetic pole pair MPR 1 . 
     When the movable part  108  is located in any position within the extreme motion range EMR and when viewed along the optical axis O, the first section SG 1  and the second magnetic pole pair MPR 2  remain non-overlapping (that is, the first section SG 1  and the second magnetic pole pair MPR 2  do not overlap). When the movable part  108  is located in any position within the extreme motion range EMR and when viewed along the optical axis O, the third section SG 3  and the second magnetic pole pair MPR 2  remain non-overlapping. 
     When the movable part  108  is located in any position within the extreme motion range EMR and when viewed along the optical axis O, the second section SG 2  remains partially overlapping the second magnetic pole pair MPR 2 . When the movable part  108  is located in any position within the extreme motion range EMR and when viewed along the optical axis O, the fourth section SG 4  remains partially overlapping the second magnetic pole pair MPR 2 . 
     When the movable part  108  is located in any position within the extreme motion range EMR and when viewed along the optical axis O, the second section SG 2  and the first magnetic pole pair MPR 1  remain non-overlapping. When the movable part  108  is located in any position within the extreme motion range EMR and when viewed along the optical axis O, the fourth section SG 4  and the first magnetic pole pair MPR 1  remain non-overlapping. 
     It should be noted that the first magnetic pole pair MPR 1  and the second magnetic pole pair MPR 2  are integrally formed in one piece. That is, the first magnetic pole pair MPR 1  and the second magnetic pole pair MPR 2  do not need to use glue to adhere to each other. 
     In addition, it should be noted that, as shown in  FIG. 8 , the optical element driving mechanism  100  may include a plurality of circuit members  113 , which are disposed in the base  112  by insert molding technology. For example, the base  112  may be made of a non-metal material, such as a plastic material, and the circuit member  113  may be made of a metal material. The circuit members  113  are configured to be electrically connected to the sensing element SE and the driving assembly DA. 
     Please refer to  FIG. 10 , which is a schematic cross-sectional view of the optical element driving mechanism  100  installed in an electronic apparatus  50  according to an embodiment of the present disclosure. The electronic apparatus  50  is, for example, a smartphone, but it is not limited thereto. The electronic apparatus  50  has a main circuit board  51 , and the optical element driving mechanism  100  is configured to be installed on the optical module  150  and the main circuit board  51  of the electronic apparatus  50 . 
     The light beam L is incident on the optical module  150  after passing through the optical element driving mechanism  100 . Furthermore, the electronic apparatus  50  may further include a protection element  52  configured to protect the optical element driving mechanism  100 . The light beam L can be incident on the optical element  107  after passing through the protection element  52 . For example, the protection element  52  is made of a light-transmissible material, such as glass or transparent plastic. 
     In summary, the present disclosure provides an optical element driving mechanism, including a movable part, a fixed assembly, and a driving assembly. The movable part is movable relative to fixed assembly. The driving assembly is configured to drive the movable part to move relative to the fixed assembly. A receiving structure is formed on the movable part, which is configured to receive the optical element, and the optical element has an identification structure, so that the optical element can be quickly positioned on the movable part. 
     The movable part also includes a connecting assembly configured to position the optical element. The connecting assembly includes multiple connecting elements, which are communicated with the receiving structure. For example, each of the connecting elements has an arc-shaped groove, and multiple adhesive elements can be respectively disposed in the connecting elements and configured to fix the optical element on the movable part. Based on the design of this disclosure, it can be ensured that when the optical element driving mechanism is impacted, the optical element can be stably fixed on the movable part. 
     Although the embodiments and their advantages have been described in detail, it should be understood that various changes, substitutions, and alterations can be made herein without departing from the spirit and scope of the embodiments as defined by the appended claims. Moreover, 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. As one of ordinary skill in the art will readily appreciate from the disclosure, processes, machines, manufacture, compositions of matter, means, methods, or steps, presently existing or later to be developed, that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein can be utilized according to the disclosure. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps. In addition, each claim constitutes a separate embodiment, and the combination of various claims and embodiments are within the scope of the disclosure.