Optical element driving mechanism

Abstract

The present disclosure provides an optical element driving mechanism. The optical element driving mechanism includes a movable part, a fixed assembly, a first driving assembly, and a guiding assembly. The movable part is configured to be connected to an optical element. The fixed assembly has a receiving space, and the movable part is partially disposed in the receiving space and movable relative to the fixed assembly. The first driving assembly is configured to drive the movable part to move relative to the fixed assembly. The guiding assembly is configured to guide the movable part to move relative to the fixed assembly along a first axis. No elastic element is disposed between the movable part and the fixed assembly.

Description

Technical Field

[0001] This disclosure relates to an optical element driving mechanism, and more particularly to an optical element driving mechanism for precise control of movement. Background Technology

[0002] With the development of technology, many electronic devices today (such as smartphones or digital cameras) have the function of taking pictures or recording videos. The use of these electronic devices is becoming more and more common, and they are developing towards convenient and thinner designs to provide users with more choices. Summary of the Invention

[0003] The purpose of this disclosure is to provide an optical element driving mechanism to solve at least one of the above-mentioned problems.

[0004] This disclosure provides an optical element driving mechanism, comprising a movable part, a fixed component, a first driving component, and a guiding component. The movable part is configured to be connected to an optical element. The fixed component has a receiving space, and the movable part is partially disposed within the receiving space and is movable relative to the fixed component. The first driving component is configured to drive the movable part to move relative to the fixed component. The guiding component is configured to guide the movable part to move relative to the fixed component along a first axis. No elastic element is disposed between the movable part and the fixed component.

[0005] According to some embodiments of this disclosure, the optical element driving mechanism further includes a second driving component configured to jointly drive the movable part relative to the fixed component within a limit movement range, together with the first driving component. The first and second driving components are configured to drive the movable part relative to the fixed component in a first direction. The first and second driving components are configured to drive the movable part relative to the fixed component in a second direction. Both the first and second directions are parallel to the first axis. The first and second directions are opposite to each other. The first and second driving components are configured to drive the movable part from a preset position to a target position. The preset position and the target position are located within the limit movement range.

[0006] According to some embodiments of this disclosure, the movable portion forms a support platform configured to support the optical element. The fixing assembly includes a cover and a base. The cover is disposed on the base to form the receiving space. The guiding assembly includes a first guiding element configured to guide the movable portion to move relative to the fixing assembly along the first axis. The first guiding element has an elongated structure. The first guiding element extends along the first axis. The first guiding element passes through the movable portion. The first guiding element is fixed to the base. The guiding assembly further includes a second guiding element configured to guide the movable portion to move relative to the fixing assembly along the first axis. The second guiding element is formed in the cover. The second guiding element has a slotted structure and extends along the first axis. The movable portion also includes a base, and the support platform extends from the base along a second axis. The second axis is perpendicular to the first axis. When viewed along the first axis, the support platform protrudes from the slotted structure. When viewed along a third axis, the support platform protrudes from the slotted structure. The third axis is perpendicular to the first axis and the second axis.

[0007] According to some embodiments of this disclosure, the guiding assembly further includes a third guiding element configured to guide the movable portion to move relative to the fixed assembly along the first axis. The third guiding element is formed on the base. The third guiding element has a slit structure extending along the first axis. The movable portion further includes an extension that extends from the base along the second axis. When viewed along the third axis, the extension does not protrude from the slit structure. When viewed along the third axis, the slit structure overlaps at least a portion of the extension.

[0008] According to some embodiments of this disclosure, the first driving assembly and the second driving assembly are disposed within the accommodating space. The first driving assembly includes: a first coil; a first magnetic element corresponding to the first coil; and a first magnetically conductive element corresponding to the first coil. The first magnetic element is disposed on the extension. The first coil surrounds the first magnetically conductive element. The first magnetically conductive element has an elongated structure. The first magnetically conductive element extends along the first axis. The second driving assembly includes: a second coil corresponding to the first magnetic element; and a second magnetically conductive element corresponding to the second coil. The second coil surrounds the second magnetically conductive element. The second magnetically conductive element has an elongated structure. The second magnetically conductive element extends along the first axis. The permeability of the first magnetically conductive element is the same as the permeability of the second magnetically conductive element. The number of turns of the first coil is equal to the number of turns of the second coil.

[0009] According to some embodiments of this disclosure, the optical element driving mechanism further includes a first limiting portion and a second limiting portion, configured to restrict the movement of the movable portion within the extreme range of motion. The first limiting portion and the second limiting portion are respectively disposed on a first side and a second side of the base. A first end and a second end of the first guiding element are respectively fixedly disposed on the first limiting portion and the second limiting portion. The optical element driving mechanism further includes a sensing component configured to sense the position of the movable portion relative to the fixed component. The sensing component includes a first sensing element disposed on the base and located on the first side. The sensing component includes a second sensing element disposed on the base and located on the second side. The first sensing element and the second sensing element are adjacent to the slit structure. When viewed along the second axis, the first guiding element is located between the first coil and the second coil. When viewed along the second axis, the movable portion overlaps at least a portion of the first coil and the second coil. When viewed along the second axis, the first coil does not overlap the first limiting portion and the second limiting portion. When viewed along the second axis, the second coil does not overlap with the first limiting portion and the second limiting portion. When viewed along the first axis, the extension is located between the first coil and the second coil. When viewed along the first axis, the first magnetic element is located between the first coil and the second coil. The optical element driving mechanism further includes a first stop surface and a second stop surface located on the cover and configured to abut against the support platform to prevent the movable part from rotating about the first axis. The optical element driving mechanism further includes a third stop surface and a fourth stop surface located on the base and configured to abut against the extension to prevent the movable part from rotating about the first axis.

[0010] According to some embodiments of this disclosure, the optical element driving mechanism further includes a control circuit configured to control the first driving assembly and the second driving assembly. The first driving assembly drives the movable part to move from an initial time point. Between the initial time point and a first time point, the control circuit provides a first current to the first coil, and the value of the first current increases linearly from zero to a first current value. Between the first time point and a second time point, the first current is maintained at the first current value. At the second time point, the movable part moves to a proximity position. The distance between the proximity position and the target position is five percent to ten percent of the limit range of motion. Between the second time point and a third time point, the value of the first current decreases linearly from the first current value to a second current value. The first current value is more than twice the second current value. At the third time point, the movable part reaches the target position and does not exceed the target position. Between the third time point and the fourth time point, the first current is maintained at the second current value.

[0011] According to some embodiments of this disclosure, the control circuit is configured to provide a second current to the second coil. Between the initial time point and the fourth time point, the second current maintains a third current value. The third current value is the same in magnitude as the second current value but opposite in phase.

[0012] According to some embodiments of this disclosure, the second driving component drives the movable part to move from the initial time point. Between the initial time point and the first time point, the control circuit provides a second current to the second coil, and the value of the second current increases linearly from zero to the second current value. Between the first time point and the second time point, the second current is maintained at the second current value. Between the second time point and the third time point, the value of the second current decreases linearly from the second current value to a third current value. Between the third time point and the fourth time point, the second current is maintained at the third current value. The third current value is the same in magnitude as the second current value but opposite in phase.

[0013] According to some embodiments of this disclosure, after the movable part moves to the target position, the control circuit continuously provides the first current to the first coil, and the first current is maintained at the second current value. After the movable part moves to the target position, the control circuit continuously provides the second current to the second coil, and the second current is maintained at the third current value.

[0014] This disclosure provides an optical element driving mechanism, including a movable part, a fixed assembly, first and second driving assemblies, and a guiding assembly. The movable part is configured to be connected to an optical element. The first and second driving assemblies are configured to drive the movable part to move relative to the fixed assembly along a first direction or a second direction. The guiding assembly is configured to guide the movable part to move relative to the fixed assembly along a first axis.

[0015] In this disclosure, no elastic element is provided between the moving part and the fixed component. Furthermore, in some embodiments, the second drive component continuously provides a fixed second electromagnetic driving force at any given time. Based on this structural design, the second electromagnetic driving force can provide a spring-like effect, but without the need for a physical spring on the moving path of the moving part. Therefore, the moving distance of the moving part can be increased, and the cost can also be reduced. Attached Figure Description

[0016] This disclosure will become clear from the following detailed description and accompanying illustrations. It should be emphasized that, in accordance with industry standard practice, the features are not drawn to scale and are for illustrative purposes only. In fact, the dimensions of the features may be arbitrarily enlarged or reduced for clarity.

[0017] Figure 1This is a perspective view of an optical element driving mechanism according to an embodiment of the present disclosure.

[0018] Figure 2 This is an exploded view of an optical element driving mechanism according to an embodiment of the present disclosure.

[0019] Figure 3 For the optical element driving mechanism according to an embodiment of the present disclosure along Figure 1 A cross-sectional view of line segment AA.

[0020] Figure 4 This is a top view of an optical element driving mechanism according to an embodiment of the present disclosure.

[0021] Figure 5 This is a perspective view of an optical element driving mechanism according to an embodiment of the present disclosure from another angle.

[0022] Figures 6 to 8 This is a top view showing the moving part of an optical element driving mechanism according to an embodiment of the present disclosure moving to different positions.

[0023] Figure 9 This is a graph showing the relationship between the current received by the first coil and the second coil according to an embodiment of the present disclosure and time.

[0024] Figure 10 This is a graph showing the relationship between the current received by the first coil and the second coil according to an embodiment of the present disclosure and time.

[0025] Figures 11 to 13 This is a top view showing the moving part of an optical element driving mechanism according to an embodiment of the present disclosure moving to different positions.

[0026] The attached figures are labeled as follows:

[0027] 100: Optical element drive mechanism

[0028] 102: Cover

[0029] 108: Activities Department

[0030] 1081: Support Platform

[0031] 1082: Base

[0032] 1083: Extension

[0033] 112: Base

[0034] 113: First limiting part

[0035] 114: Second limiting part

[0036] 130: Control Circuit

[0037] 200: Optical Components

[0038] AS: Compartmental Space

[0039] AX1: First axis

[0040] AX2: Second axis

[0041] AX3: Third axis

[0042] BS1: First stop surface

[0043] BS2: Second stop surface

[0044] BS3: Third stop surface

[0045] BS4: Fourth stop surface

[0046] CL1: First coil

[0047] CL2: Second coil

[0048] CM1: First magnetically conductive element

[0049] CM2: Second magnetic permeable element

[0050] D1: First Direction

[0051] D2: Second Direction

[0052] DA1: First driving component

[0053] DA2: Second driving component

[0054] DM: Driver Module

[0055] EF1: First electromagnetic driving force

[0056] EF2: Second electromagnetic driving force

[0057] EMR: Extreme Range of Motion

[0058] FA: Fixed component

[0059] GA: Guiding Component

[0060] GE1: First guiding element

[0061] GE2: Second Guiding Element

[0062] GE3: Third Guiding Element

[0063] IC1: First Current

[0064] IC2: Second Current

[0065] IV1: First current value

[0066] IV2: Second current value

[0067] IV3: Third Current Value

[0068] MA: Active Component

[0069] MG1: First magnetic element

[0070] SA: Sensing Components

[0071] SE1: First sensing element

[0072] SE2: Second sensing element

[0073] t0: Initial time point

[0074] t1: First time point

[0075] t2: Second time point

[0076] t3: Third time point

[0077] t4: Fourth time point

[0078] X: X-axis

[0079] Y: Y-axis

[0080] Z: Z-axis Detailed Implementation

[0081] The following discloses many different implementations or examples to carry out the different features provided. Specific embodiments of the elements and their arrangements are described below to illustrate this disclosure. Of course, these embodiments are merely illustrative and should not be construed as limiting the scope of this disclosure. For example, the specification mentions that a first feature is formed on a second feature. This may include embodiments where the first and second feature are in direct contact, or embodiments where there are other features between the first and second feature; in other words, the first and second feature are not in direct contact.

[0082] Furthermore, repeated reference numerals or designations may be used in different embodiments. These repetitions are merely for the purpose of clearly and simply describing this disclosure and do not represent a specific relationship between the different embodiments and / or structures discussed. Additionally, the formation, connection, and / or coupling to another feature component in this disclosure may include embodiments in which the feature components are formed in direct contact, and may also include embodiments in which additional feature components may be formed to insert into the aforementioned feature component, such that the aforementioned feature components may not be in direct contact. Furthermore, spatially related terms such as “vertical,” “above,” “up,” “below,” “bottom,” and similar terms (e.g., “downward,” “upward,” etc.) may be used to facilitate the description of the relationship between one element(s) or feature(s) in the illustrations and another element(s) or feature(s). These spatially related terms are intended to cover different orientations of the device including the feature.

[0083] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which this disclosure pertains. It is understood that these terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the relevant art and the background or context of this disclosure, and should not be interpreted in an idealized or overly formal manner, unless specifically defined herein.

[0084] Furthermore, the use of ordinal numbers such as "first" and "second" in the specification and claims to modify elements of the claims does not imply or represent any prior ordinal number for the claimed element, nor does it represent the order of one claimed element with another, or the order of manufacturing methods. The use of multiple ordinal numbers is only to enable a claimed element with a certain name to be clearly distinguished from another claimed element with the same name.

[0085] Furthermore, in some embodiments of this disclosure, terms such as "connection" and "interconnection," unless specifically defined, may refer to two structures in direct contact, or they may refer to two structures that are not in direct contact, with other structures disposed between them. Moreover, these terms regarding joining and connection may also include cases where both structures are movable or both structures are fixed.

[0086] Please refer to Figures 1 to 3 , Figure 1 This is a perspective view of an optical element driving mechanism 100 according to an embodiment of the present disclosure. Figure 2 This is an exploded view of an optical element driving mechanism 100 according to an embodiment of the present disclosure, and Figure 3 For the optical element driving mechanism 100 according to an embodiment of the present disclosure along Figure 1A cross-sectional view of line segment AA. The optical element drive mechanism 100 may be an optical camera module configured to carry and drive an optical element 200 or an optical system (e.g., a voice coil motor). The optical element drive mechanism 100 can be installed in various electronic devices or portable electronic devices, such as smartphones, to allow users to perform image extraction functions.

[0087] In this embodiment, the optical element driving mechanism 100 may include a fixed component FA, a movable component MA, and a driving module DM. The movable component MA is movably connected to the fixed component FA. The driving module DM is configured to drive the movable component MA to move relative to the fixed component FA.

[0088] In this embodiment, as Figure 2 As shown, the fixed component FA includes a cover 102 and a base 112, and the movable component MA may include a movable part 108 and the aforementioned optical element 200. In this embodiment, the movable part 108 may include a support platform 1081 configured to support the optical element 200, wherein the optical element 200 may also be a light shield or a shutter, but is not limited thereto. In other embodiments, the optical element 200 may also be a filter or an aperture, etc.

[0089] The cover 102 is fixedly mounted on the base 112. The cover 102 can be combined with the base 112 to form a receiving space AS to receive the movable component MA and the drive module DM. The movable part 108 is partially disposed in the receiving space AS and can move relative to the fixed component FA.

[0090] Additionally, the optical element drive mechanism 100 may further include a guide assembly GA configured to guide the movable part 108 to move relative to the fixed assembly FA along a first axis AX1. It is worth noting that in this disclosure, no elastic element, such as a spring, is provided between the movable part 108 and the fixed assembly FA.

[0091] Next, please refer to the following: Figures 1 to 4 , Figure 4 This is a top view of an optical element driving mechanism 100 according to an embodiment of the present disclosure. In this embodiment, the driving module DM includes a first driving component DA1 configured to drive the movable part 108 to move relative to the fixed component FA along a first axis AX1. Additionally, the optical element driving mechanism 100 may further include a second driving component DA2 configured to, together with the first driving component DA1, drive the movable part 108 to move relative to the fixed component FA within a limit range of motion EMR. Figure 4 ).

[0092] For example, the first drive assembly DA1 and the second drive assembly DA2 are configured to drive the movable part 108 to move relative to the fixed assembly FA in a first direction D1. Alternatively, the first drive assembly DA1 and the second drive assembly DA2 can also drive the movable part 108 to move relative to the fixed assembly FA in a second direction D2. Both the first direction D1 and the second direction D2 are parallel to the first axis AX1, but the first direction D1 and the second direction D2 are opposite to each other.

[0093] The first drive component DA1 and the second drive component DA2 are configured to drive the movable part 108 from a preset position to a target position. For example, the preset position may be where the movable part 108 is... Figure 4 The leftmost position in the middle, and the target position can be the activity section 108. Figure 4 The rightmost position in the equation, but not limited to this. For example, both the preset position and the target position are located within the extreme range of motion (EMR).

[0094] In this embodiment, the first driving component DA1 and the second driving component DA2 are disposed within the accommodating space AS. The first driving component DA1 includes a first coil CL1, a first magnetically conductive element CM1, and a first magnetic element MG1. The first magnetic element MG1 corresponds to the first coil CL1, and the first magnetically conductive element CM1 corresponds to the first coil CL1.

[0095] like Figures 2 to 4 As shown, the first magnetic element MG1 is disposed on an extension 1083 of the movable part 108, and the first coil CL1 surrounds the first magnetically conductive element CM1. For example, the first magnetically conductive element CM1 has an elongated structure and extends along the first axis AX1.

[0096] Furthermore, the second drive assembly DA2 may include a second coil CL2 and a second magnetically conductive element CM2. The second coil CL2 corresponds to the first magnetic element MG1, and the second magnetically conductive element CM2 corresponds to the second coil CL2. The second coil CL2 surrounds the second magnetically conductive element CM2.

[0097] For example, the second magnetic element CM2 has an elongated structure and extends along the first axis AX1. It is worth noting that the permeability of the first magnetic element CM1 is the same as that of the second magnetic element CM2, and the number of turns in the first coil CL1 is equal to the number of turns in the second coil CL2.

[0098] Furthermore, the size of the first magnetic element CM1 is equal to the size of the second magnetic element CM2, and the size of the first coil CL1 is also equal to the size of the second coil CL2. In other words, the first magnetic element CM1 and the second magnetic element CM2 are identical components, and the first coil CL1 and the second coil CL2 are identical components. Therefore, when the first coil CL1 and the second coil CL2 receive the same amount of current, the electromagnetic driving force generated by the first coil CL1 and the first magnetic element MG1 will be the same as the electromagnetic driving force generated by the second coil CL2 and the first magnetic element MG1.

[0099] The guiding assembly GA includes a first guiding element GE1 configured to guide the movable part 108 to move relative to the fixed assembly FA along the first axis AX1. The first guiding element GE1 has an elongated structure, such as a cylindrical structure, and extends along the first axis AX1. As shown, the first guiding element GE1 passes through the movable part 108 and is fixed to the base 112.

[0100] Furthermore, the guide assembly GA may also include a second guide element GE2, configured to guide the movable part 108 to move relative to the fixed assembly FA along the first axis AX1. The second guide element GE2 is formed on the cover 102 and has a slotted structure, extending along the first axis AX1.

[0101] In this embodiment, the movable part 108 further includes a base 1082, and the support platform 1081 extends from the base 1082 along a second axis AX2. The second axis AX2 is perpendicular to the first axis AX1.

[0102] like Figure 1 and Figure 3 As shown, when viewed along the first axis AX1, the support platform 1081 protrudes from the slotted structure (second guide element GE2). When viewed along a third axis AX3, the support platform 1081 protrudes from the slotted structure. The third axis AX3 is perpendicular to both the first axis AX1 and the second axis AX2.

[0103] Please refer to Figures 2 to 5 , Figure 5 This is a perspective view of an optical element driving mechanism 100 according to an embodiment of the present disclosure from another angle. Figure 5 As shown, the guide assembly GA also includes a third guide element GE3, configured to guide the movable part 108 to move relative to the fixed assembly FA along the first axis AX1.

[0104] A third guiding element GE3 is formed on the base 112, and the third guiding element GE3 has a slit structure extending along the first axis AX1. For example... Figure 2 and Figure 5 As shown, the active part 108 also includes an extension 1083, and the extension 1083 is formed by extending the base 1082 along the second axis AX2.

[0105] like Figure 3 As shown, when viewed along the third axis AX3, the extension 1083 does not protrude from the slit structure. When viewed along the third axis AX3, the slit structure overlaps at least a portion of the extension 1083.

[0106] Furthermore, the optical element driving mechanism 100 also includes a first stop surface BS1 and a second stop surface BS2, located on the cover 102, and configured to abut against the support platform 1081 to prevent the movable part 108 from rotating about the first axis AX1. The slotted structure can be formed by the first stop surface BS1 and the second stop surface BS2.

[0107] The optical element driving mechanism 100 further includes a third stop surface BS3 and a fourth stop surface BS4, located on the base 112, configured to abut against the extension 1083 to prevent the movable part 108 from rotating about the first axis AX1. The slit structure may be formed by the third stop surface BS3 and the fourth stop surface BS4.

[0108] Based on the design of the first stop surface BS1 to the fourth stop surface BS4, it can be ensured that the moving part 108 moves stably along the first axis AX1 and does not rotate around the first axis AX1.

[0109] Furthermore, such as Figure 2 With Figure 4 As shown, the optical element driving mechanism 100 further includes a first limiting part 113 and a second limiting part 114, configured to limit the movement of the movable part 108 within the extreme range of motion (EMR). The first limiting part 113 and the second limiting part 114 are respectively disposed on a first side SS1 and a second side SS2 of the base 112.

[0110] like Figure 4 As shown, a first end GE11 and a second end GE12 of the first guiding element GE1 are fixedly disposed on the first limiting part 113 and the second limiting part 114, respectively, for example, by using glue.

[0111] Additionally, the optical element driving mechanism 100 also includes a sensing component SA configured to sense the position of the movable part 108 relative to the fixed component FA. The sensing component SA includes a first sensing element SE1, disposed on the base 112 and located on the first side SS1. The sensing component SA also includes a second sensing element SE2, disposed on the base 112 and located on the second side SS2. Figure 5 As shown, the first sensing element SE1 and the second sensing element SE2 are adjacent to the slit structure.

[0112] The first sensing element SE1 and the second sensing element SE2 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.

[0113] like Figure 4 As shown, when viewed along the second axis AX2, the first guiding element GE1 is located between the first coil CL1 and the second coil CL2. When viewed along the second axis AX2, the movable part 108 overlaps at least a portion of the first coil CL1 and the second coil CL2.

[0114] When viewed along the second axis AX2, the first coil CL1 does not overlap with the first limiting portion 113 and the second limiting portion 114. When viewed along the second axis AX2, the second coil CL2 does not overlap with the first limiting portion 113 and the second limiting portion 114.

[0115] like Figure 3 As shown, when viewed along the first axis AX1, the extension 1083 is located between the first coil CL1 and the second coil CL2. When viewed along the first axis AX1, the first magnetic element MG1 is located between the first coil CL1 and the second coil CL2.

[0116] The following describes the operation process of moving the activity unit 108 from the preset position to the target position. Please refer to... Figure 4 as well as Figures 6 to 9 , Figures 6 to 8 A top view showing the movement of the movable part 108 of an optical element driving mechanism 100 according to an embodiment of the present disclosure to different positions, and Figure 9 This is a graph showing the relationship between the current received by the first coil CL1 and the second coil CL2 according to an embodiment of the present disclosure and time.

[0117] In this disclosure, the optical element driving mechanism 100 further includes a control circuit 130 configured to control the first driving component DA1 and the second driving component DA2, thereby controlling the position of the movable part 108 relative to the base 112. For example, as Figure 4 and Figure 9As shown, the first drive component DA1 provides a first electromagnetic driving force EF1 to drive the movable part 108 to move from an initial time point t0. At the initial time point t0, the movable part 108 is located at... Figure 4 The default position on the far left of the text.

[0118] Next, the moving part 108 begins to move to the right. Between the initial time point t0 and a first time point t1, the control circuit 130 provides a first current IC1 to the first coil CL1, so that the first coil CL1 and the first magnetic element MG1 generate the first electromagnetic driving force EF1. Figure 9 As shown, the current value of the first current IC1 increases linearly from 0 to a first current value IV1. In this embodiment, at the first time point t1, the active part 108 is, for example, located at... Figure 6 The position in the middle.

[0119] Between a first time point t1 and a second time point t2, the first current IC1 is maintained at a first current value IV1. That is, the first current value IV1 is a constant, and therefore the corresponding first electromagnetic driving force EF1 is also a constant, and continues to drive the movable part 108 to move to the right along the first direction D1.

[0120] Then, at the second time point t2, the active part 108 moves to a near position, for example, Figure 7 The position within the target location. The distance between the approach position and the target location is, for example, five to ten percent of the extreme range of motion (EMR).

[0121] Between a second time point t2 and a third time point t3, the current value of the first current IC1 linearly decreases from a first current value IV1 to a second current value IV2. In this embodiment, the first current value IV1 is more than twice, for example, three times, the second current value IV2, but is not limited thereto. During this time interval, the moving speed of the movable part 108 begins to decrease.

[0122] At the third time point t3, the movable part 108 reaches the target position but does not exceed the target position, that is, the movable part 108 does not collide with the second limiting part 114. Afterwards, between the third time point t3 and the fourth time point t4, the first current IC1 is maintained at the second current value IV2.

[0123] On the other hand, during the movement of the movable part 108, the control circuit 130 is configured to provide a second current IC2 to the second coil CL2 so that the second coil CL2 and the first magnetic element MG1 generate a second electromagnetic driving force EF2, and the direction of the second electromagnetic driving force EF2 is opposite to the direction of the first electromagnetic driving force EF1.

[0124] like Figure 9As shown, between the initial time point t0 and the fourth time point t4, the second current IC2 maintains a third current value IV3. The third current value IV3 is a constant, meaning the second electromagnetic driving force EF2 is also a constant. At the third time point t3, the third current value IV3 and the second current value IV2 are the same in magnitude but opposite in phase. Therefore, at this time, the first electromagnetic driving force EF1 and the second electromagnetic driving force EF2 are the same in magnitude but opposite in direction, allowing the movable part 108 to be fixed at the target position.

[0125] Based on the design of this embodiment, the second electromagnetic driving force EF2 provided by the second coil CL2 can provide a spring-like effect, but without the need for a physical spring on the moving path of the movable part 108, thus increasing the moving distance of the movable part 108. For example, the optical element 200 carried by the movable part 108 is an optical lens, therefore the design of this disclosure can increase the focal length of the optical lens and also reduce costs.

[0126] Please refer to Figures 10 to 13 as well as Figure 8 , Figure 10 This is a graph showing the relationship between the current received by the first coil CL1 and the second coil CL2 according to an embodiment of the present disclosure and time. Figures 11 to 13 This is a top view showing the movable part 108 of an optical element driving mechanism 100 according to an embodiment of the present disclosure moving to different positions. In this embodiment, the first driving component DA1 and the second driving component DA2 jointly drive the movable part 108 to move from an initial time point t0. The change in the first current IC1 received by the first coil CL1 is the same as in the previous embodiment, and therefore will not be described again here.

[0127] Between the initial time point t0 and the first time point t1, the control circuit 130 provides a second current IC2 to the second coil CL2 to generate a second electromagnetic driving force EF2, wherein the direction of the second electromagnetic driving force EF2 is the same as the direction of the first electromagnetic driving force EF1, such as... Figure 11 As shown, the current value of the second current IC2 increases linearly from zero to the second current value IV2. In this embodiment, at the first time point t1, the active part 108 is, for example, located at... Figure 12 The position in the middle.

[0128] Between the first time point t1 and the second time point t2, the second current IC2 is maintained at the second current value IV2. That is, the second electromagnetic driving force EF2 is also a constant value, and the second electromagnetic driving force EF2 is less than the first electromagnetic driving force EF1.

[0129] Then, at the second time point t2, the active part 108 moves to a near position, for example, Figure 13The position within the target location. The distance between the approach position and the target location is, for example, five to fifteen percent of the extreme range of motion (EMR), but not limited thereto.

[0130] Between the second time point t2 and the third time point t3, the current value of the second current IC2 decreases linearly from the second current value IV2 to the third current value IV3. At the third time point t3, the third current value IV3 is the same magnitude as the second current value IV2 but opposite in phase. Therefore, at this time, the first electromagnetic driving force EF1 is the same magnitude as the second electromagnetic driving force EF2 but opposite in direction, allowing the movable part 108 to be fixed at the target position, such as... Figure 8 As shown.

[0131] Finally, between the third time point t3 and the fourth time point t4, the second current IC2 is maintained at the third current value IV3.

[0132] Specifically, after the movable part 108 moves to the target position, the control circuit 130 continuously supplies a first current IC1 to the first coil CL1, and the first current IC1 is maintained at a second current value IV2. After the movable part 108 moves to the target position, the control circuit 130 continuously supplies a second current IC2 to the second coil CL2, and the second current IC2 is maintained at a third current value IV3. Thus, the movable part 108 can be stably fixed at the target position.

[0133] In summary, this disclosure provides an optical element driving mechanism, comprising a movable part, a fixed component, first and second driving components, and a guiding component. The movable part is configured to be connected to an optical element. The first and second driving components are configured to drive the movable part to move relative to the fixed component along a first direction or a second direction. The guiding component is configured to guide the movable part to move relative to the fixed component along a first axis.

[0134] In this disclosure, no elastic element is provided between the moving part and the fixed component. Furthermore, in some embodiments, the second drive component continuously provides a fixed second electromagnetic driving force at any given time. Based on this structural design, the second electromagnetic driving force can provide a spring-like effect, but without the need for a physical spring on the moving path of the moving part. Therefore, the moving distance of the moving part can be increased, and the cost can also be reduced.

[0135] While the embodiments and advantages of this disclosure have been disclosed above, it should be understood that those skilled in the art can make modifications, substitutions, and refinements without departing from the spirit and scope of this disclosure. Furthermore, the scope of protection of this disclosure is not limited to the processes, machines, manufacturing methods, material compositions, apparatuses, methods, and steps described in the specific embodiments of the specification. Any processes, machines, manufacturing methods, material compositions, apparatuses, methods, and steps that are currently in use or will be developed in the future can be understood from the content of this disclosure, and can be used according to this disclosure as long as they can perform substantially the same function or obtain substantially the same results in the embodiments described herein. Therefore, the scope of protection of this disclosure includes the aforementioned processes, machines, manufacturing methods, material compositions, apparatuses, methods, and steps. In addition, each claim constitutes an individual embodiment, and the scope of protection of this disclosure also includes combinations of the various claims and embodiments.

Claims

1. An optical element driving mechanism, comprising: A movable part, configured to connect to an optical element; A fixed component has a receiving space, wherein the movable part is partially disposed within the receiving space and is movable relative to the fixed component; A first drive component is configured to drive the movable part to move relative to the fixed component; as well as A guide component configured to guide the movable part to move relative to the fixed component along a first axis; There are no elastic elements between the movable part and the fixed component; The active section includes a support platform configured to support the optical element; The fixing component includes a cover and a base; The cover is disposed on the base to form the receiving space; The guiding assembly includes a first guiding element configured to guide the movable part to move relative to the fixed assembly along the first axis; The first guiding element extends along the first axis; The first guiding element passes through the movable part; The guiding assembly also includes a second guiding element configured to guide the movable part to move relative to the fixed assembly along the first axis; The second guiding element is formed in the cover; The second guiding element has a slotted structure and extends along the first axis; When viewed along the first axis, the support platform and the optical element protrude from the slotted structure; The active section also includes a base, and the support platform extends from the base along a second axis; The second axis is perpendicular to the first axis; When viewed along a third axis, the support platform protrudes from the slotted structure; The third axis is perpendicular to both the first axis and the second axis; The active part also includes an extension, which extends from the base along the second axis; The optical element driving mechanism further includes a second driving component configured to drive the movable part relative to the fixed component within a range of extreme motion together with the first driving component. The first driving component includes a first coil; The second drive component includes a second coil; When viewed along the first axis, the extension is located between the first coil and the second coil; When viewed along the third axis, the extension overlaps the first coil and the second coil; When viewed along the second axis, the substrate overlaps the first coil and the second coil.

2. The optical element driving mechanism as claimed in claim 1, wherein the first driving component and the second driving component are configured to drive the movable part to move relative to the fixed component in a first direction; The first drive assembly and the second drive assembly are configured to drive the movable part to move relative to the fixed assembly in a second direction; Both the first direction and the second direction are parallel to the first axis; The first direction and the second direction are opposite to each other; The first drive component and the second drive component are configured to drive the movable part to move from a preset position to a target position; The preset position and the target position are both within the range of extreme motion.

3. The optical element driving mechanism as described in claim 2, wherein... The first guiding element has a long strip-shaped structure; The first guiding element is fixed to the base.

4. The optical element driving mechanism as described in claim 3, wherein... The guiding assembly also includes a third guiding element configured to guide the movable part to move relative to the fixed assembly along the first axis; The third guiding element is formed on the base; The third guiding element has a slit structure that extends along the first axis; When viewed along the third axis, the extension does not protrude from the slit structure; When viewed along the third axis, the slit structure overlaps at least a portion of the extension.

5. The optical element driving mechanism as described in claim 4, wherein... The first drive component and the second drive component are disposed within the accommodating space; The first drive component includes: A first magnetic element, corresponding to the first coil; and A first magnetically conductive element corresponds to the first coil; The first magnetic element is disposed on the extension; The first coil surrounds the first magnetically conductive element; The first magnetically conductive element has an elongated strip structure; The first magnetically conductive element extends along the first axis; The second drive component includes: The second coil corresponds to the first magnetic element; and A second magnetically conductive element corresponds to the second coil; The second coil surrounds the second magnetically conductive element; The second magnetically conductive element has an elongated strip structure; The second magnetically conductive element extends along the first axis; The permeability of the first magnetic element is the same as that of the second magnetic element; The number of turns in the first coil is equal to the number of turns in the second coil.

6. The optical element driving mechanism as described in claim 5, wherein... The optical element driving mechanism also includes a first limiting part and a second limiting part, configured to restrict the movement of the movable part within the extreme range of motion; The first limiting part and the second limiting part are respectively disposed on a first side and a second side of the base; A first end and a second end of the first guiding element are respectively fixedly disposed on the first limiting portion and the second limiting portion; The optical element drive mechanism also includes a sensing component configured to sense the position of the movable part relative to the fixed component; The sensing assembly includes a first sensing element disposed on the base and located on the first side; The sensing assembly includes a second sensing element disposed on the base and located on the second side; The first sensing element and the second sensing element are adjacent to the slit structure; When viewed along the second axis, the first guiding element is located between the first coil and the second coil; When viewed along the second axis, the movable part overlaps at least a portion of the first coil and the second coil; When viewed along the second axis, the first coil does not overlap with the first limiting portion and the second limiting portion; When viewed along the second axis, the second coil does not overlap with the first limiting portion and the second limiting portion; When viewed along the first axis, the extension is located between the first coil and the second coil; When viewed along the first axis, the first magnetic element is located between the first coil and the second coil; The optical element drive mechanism also includes a first stop surface and a second stop surface, located on the cover, and configured to abut against the support platform to prevent the movable part from rotating about the first axis. The optical element drive mechanism also includes a third stop surface and a fourth stop surface located on the base and configured to abut against the extension to prevent the movable part from rotating about the first axis.

7. The optical element driving mechanism of claim 6, wherein the optical element driving mechanism further includes a control circuit configured to control the first driving component and the second driving component; The first drive component drives the active part to move from an initial time point; Between the initial time point and a first time point, the control circuit provides a first current to the first coil, and the value of the first current increases linearly from zero to a first current value. Between the first time point and the second time point, the first current is maintained at the first current value; At that second time point, the active part moved to a near position; The distance between the approach position and the target position is five to ten percent of the limit range of motion; Between the second time point and a third time point, the current value of the first current decreases linearly from the first current value to a second current value; The first current value is more than twice the second current value; At that third point in time, the activity unit arrived at the target location but did not exceed the target location; Between the third time point and the fourth time point, the first current is maintained at the second current value.

8. The optical element driving mechanism as claimed in claim 7, wherein The control circuit is configured to provide a second current to the second coil; Between the initial time point and the fourth time point, the second current maintains a third current value; The third current value is the same in magnitude as the second current value but in opposite phase.

9. The optical element driving mechanism as claimed in claim 7, wherein... The second drive component drives the active part to move from the initial time point; Between the initial time point and the first time point, the control circuit provides a second current to the second coil, and the value of the second current increases linearly from zero to the second current value; Between the first time point and the second time point, the second current is maintained at the second current value; Between the second time point and the third time point, the current value of the second current decreases linearly from the second current value to a third current value; Between the third time point and the fourth time point, the second current is maintained at the third current value; The third current value is the same in magnitude as the second current value but in opposite phase.

10. The optical element driving mechanism as claimed in claim 9, wherein... After the movable part moves to the target position, the control circuit continuously supplies the first current to the first coil, and the first current is maintained at the second current value; After the moving part moves to the target position, the control circuit continuously supplies the second current to the second coil, and the second current is maintained at the third current value.

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