Optical element driving mechanism

Abstract

An optical element driving mechanism comprises a movable part, a first frame, a driving assembly and a first sensing assembly. The movable part is used for connecting an optical element. The movable part can move relative to the first frame. The driving assembly drives the movable part to move relative to the first frame. The first sensing assembly is used for sensing the movement of the movable part.

Description

Technical Field

[0001] The present invention relates to an optical element driving mechanism, in particular to an optical element driving mechanism capable of driving an optical element to move in two dimensions. Background Art

[0002] With the development of technology, many electronic devices (such as laptops, smart phones or digital cameras) now have the function of taking photos or recording videos. The use of these electronic devices is becoming more and more common. In addition to developing more stable and better optical quality, they are also moving towards convenient and lightweight designs to provide users with more choices.

[0003] An optical component is needed that allows the optical photography focal length to be adjusted to meet different external photography requirements. However, when an optical component with a longer focal length (such as a lens) is required to be disposed in the aforementioned electronic device, the thickness of the electronic device will increase, which is not conducive to the thinness and stability of the electronic device. In view of this, how to design an optical component driving mechanism that can make the electronic device thinner and more stable has become an important issue. Summary of the invention

[0004] An object of the present invention is to provide an optical element driving mechanism to solve at least one of the above problems.

[0005] The terms of embodiment and similar terms (e.g., implementation, configuration, features, examples, and options) are intended to broadly refer to all of the subject matter of the present invention and the following claims. Several statements containing these terms should be understood as not limiting the subject matter described herein or limiting the meaning or scope of the following claims. The embodiments of the present invention covered herein are defined by the following claims, rather than this content. This content is a high-level overview of the various features of the present invention and introduces some of the concepts described in more detail in the following implementation paragraphs. This content is not intended to identify the key or essential features of the subject matter of the claims, nor is it intended to be used independently to determine the scope of the subject matter of the claims. This subject matter should be understood by reference to appropriate portions of the complete specification of the present invention, any or all drawings, and each claim.

[0006] In order to solve the above-mentioned known problems, according to certain features of the present disclosure, an optical element driving mechanism is provided, comprising a movable part, a first frame, a driving component and a first sensing component. The movable part is used to connect an optical element. The movable part can move relative to the first frame. The driving component is used to drive the movable part to move relative to the first frame. The first sensing component is used to sense the movement of the movable part.

[0007] According to certain features of the present disclosure, the optical element driving mechanism further includes a second frame and an optical module, wherein the first frame is arranged on the optical module, and the optical module further includes a movable part, a fixed part, a driving unit and a second sensing component. The movable part is used to connect an optical unit. The movable part can move relative to the fixed part. The driving unit is used to drive the movable part to move relative to the fixed part. The second sensing component is used to sense the movement of the movable part. The second frame is fixedly connected to the movable part. Part of the driving component is fixedly connected to the first frame. The first frame is fixedly connected to the fixed part, and the driving component and the driving unit are located on different sides of the fixed part.

[0008] According to certain features of the present disclosure, the drive component includes a first coil, a magnetic element and a second coil. The first coil has a first section, a second section and a third section. The magnetic element has a magnetic element surface facing the first section. The second coil corresponds to the magnetic element and has a fourth section, a fifth section and a sixth section. The first section is connected to the third section via the second section. The first section is not parallel to the second section. The third section is not parallel to the second section. When observed in a direction perpendicular to the surface of the magnetic element, the surface of the magnetic element does not overlap with the third section. When observed in a direction perpendicular to the surface of the magnetic element, the surface of the magnetic element does not completely cover the second section. The fourth section is connected to the sixth section via the fifth section. The fourth section is not parallel to the fifth section. The sixth section is not parallel to the fifth section. A magnetic pole arrangement direction of the magnetic element passes through the surface of the magnetic element.

[0009] According to certain features of the present disclosure, a first sensing element of the first sensing component is disposed between the first coil and the second coil. The first sensing element corresponds to the magnetic element. The first sensing element includes a reference portion and a magnetized portion. The reference portion has a fixed magnetic field direction. The magnetized portion can change the magnetic field direction according to the direction of the surrounding magnetic field. The driving component is used to drive the movable portion to move in a first dimension relative to the first frame. The driving unit is used to drive the movable portion and the movable portion to move in a second dimension relative to the fixed portion.

[0010] According to certain features of the present disclosure, the movable part can move within a movable part motion range relative to the first frame. The movable part motion range is defined by a first extreme position and a second extreme position. When the movable part is located at the first extreme position, the angle between the magnetic pole arrangement direction and the fixed magnetic field direction is not 0 degrees or 180 degrees. When the movable part is located at the second extreme position, the angle between the magnetic pole arrangement direction and the fixed magnetic field direction is not 0 degrees or 180 degrees. When the movable part is located at any position within the movable part motion range, the angle between the magnetic pole arrangement direction and the fixed magnetic field direction is not 0 degrees or 180 degrees.

[0011] According to certain features of the present disclosure, a preset position of the movable part is defined within the range of motion of the movable part. The preset position of the movable part is located in the middle part of the third equal parts of the range of motion of the movable part. When the movable part is located at the preset position of the movable part, the angle between the direction of the magnetic pole arrangement and the direction of the fixed magnetic field is between 60 degrees and 120 degrees. When the movable part is located at the preset position of the movable part, the angle between the direction of the magnetic pole arrangement and the direction of the fixed magnetic field is 90 degrees. The movable part can move relative to the fixed part within a movable part motion range.

[0012] According to certain features of the present disclosure, the optical element driving mechanism further includes a first database, a second database, and a third database. The first database is used to record the relationship between the position of the movable part and a first sensing signal output by the first sensing component. The second database is used to record the relationship between the position of the movable part and a second sensing signal output by the second sensing component. The third database is used to record the correlation between the first database and the second database.

[0013] According to certain features of the present disclosure, the third database includes a relationship between a plurality of positions of the movable portion within the movable portion movement range and the first sensing signal when the movable portion is located at a preset movable portion position.

[0014] According to certain features of the present disclosure, the third database includes the relationship between the first sensing signal and a plurality of positions of the movable part within the range of motion of the movable part when the movable part is located at a first calibration position. The movable part preset position is different from the first calibration position. The third database includes the relationship between the first sensing signal and a plurality of positions of the movable part within the range of motion of the movable part when the movable part is located at a second calibration position. The movable part preset position is different from the second calibration position. The first calibration position and the second calibration position are different, and the movable part preset position is located between the first calibration position and the second calibration position.

[0015] According to certain features of the present disclosure, the optical element driving mechanism further includes a control unit, which outputs a control signal to drive the movable part according to the first sensing signal, the second sensing signal and the first database, the second database and the third database.

[0016] The beneficial effects of the present invention are that the optical system of the embodiment of the present disclosure can make the movable part move smoothly relative to the fixed part, and can drive the movable part by the driving component to change the size of the opening formed by the optical element, thereby adjusting the amount of light entering, and drive the movable part by the driving unit to change the position of the movable part, thereby adjusting the focal length of the lens.

[0017] The above summary of the invention is not intended to present every embodiment or every feature of the present invention. Rather, the foregoing summary of the invention merely provides examples of some of the novel features and characteristics set forth herein. The above features and advantages and other features and advantages of the present invention will become apparent from the following detailed description of representative embodiments and modes for carrying out the present invention when taken in conjunction with the accompanying drawings and the appended claims. Additional features of the present invention will be apparent to those skilled in the art in view of the detailed description of various embodiments provided below with reference to the accompanying drawings, symbolically briefly illustrated. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention and its advantages will be better understood from the following description of exemplary embodiments in conjunction with reference to the accompanying drawings, which illustrate exemplary embodiments only and therefore should not be considered as limiting the various embodiments or the claims.

[0019] Figure 1 A front perspective view of an optical element driving mechanism according to certain features of the present disclosure.

[0020] Figure 2 FIG. 1 is a rear perspective view of an optical element driving mechanism according to certain features of the present disclosure.

[0021] Figure 3 The present invention is a front exploded perspective view of an optical element driving mechanism according to certain features of the present disclosure.

[0022] Figure 4 A rear perspective view of an optical element driving mechanism according to certain features of the present disclosure, wherein for illustrative purposes, an outer frame of the movable portion is not combined with a movable portion body of the movable portion, and a first frame is shown in dotted lines.

[0023] Figure 5 A rear perspective view of a driving assembly and a sensing element of a first sensing assembly according to certain features of the present disclosure.

[0024] Figure 6 FIG. 1 is a rear view of a driving assembly and a sensing element of a first sensing assembly according to certain features of the present disclosure.

[0025] Figure 7 A rear perspective view of an optical element driving mechanism according to certain features of the present disclosure, wherein the movable portion is located at a preset position, and for illustrative purposes, the upper cover and the first frame are shown in dotted lines.

[0026] Figure 8 According to certain features of the present disclosure, a rear perspective view of an optical element driving mechanism is shown, wherein the movable portion is located at a first extreme position, and for illustrative purposes, the upper cover and the first frame are shown in dotted lines.

[0027] Fig. 9 According to certain features of the present disclosure, a rear perspective view of an optical element driving mechanism, wherein the movable portion is located at a second extreme position, and for illustrative purposes, the upper cover and the first frame are shown in dotted lines.

[0028] Fig.10 1 is a graph showing the relationship between the change in the angle between the magnetic pole arrangement direction of the magnetic element and the fixed magnetic field direction of the reference portion of the sensing element and the resistance according to certain features of the present disclosure.

[0029] Fig.11 A rear stereoscopic view of an optical element driving mechanism according to certain features of the present disclosure, wherein the movable portion is located at a preset position, and for illustrative purposes, elements such as the optical element, the outer frame, the upper cover, and the first frame are removed, and the bottom shell is shown in dotted lines.

[0030] Fig.12 A rear stereoscopic view of an optical element driving mechanism according to certain features of the present disclosure, wherein the movable portion is located at a first calibration position, and for illustrative purposes, elements such as the optical element, outer frame, upper cover, and first frame are removed, and the bottom shell is shown in dotted lines.

[0031] Fig.13 A rear stereoscopic view of an optical element driving mechanism according to certain features of the present disclosure, wherein the movable portion is located at a second calibration position, and for illustrative purposes, elements such as the optical element, outer frame, upper cover, and first frame are removed, and the bottom shell is shown in dotted lines.

[0032] Fig.14 A block diagram of a control unit, a first database, a second database, and a third database of an optical element driving mechanism according to certain features of the present disclosure.

[0033] The reference numerals are as follows:

[0034] 1: Optical element drive mechanism

[0035] 10: Optical components

[0036] 10-a: hole

[0037] 10-b: Long hole

[0038] 20: Optical unit

[0039] 110: Activities Department

[0040] 111: Activity Department

[0041] 111-b: convex column

[0042] 112: Connecting element

[0043] 120: First frame

[0044] 130: Drive components

[0045] 131: First coil

[0046] 131-1: The first section

[0047] 131-2: The second section

[0048] 131-3: The third section

[0049] 132: Second coil

[0050] 132-1: The fourth section

[0051] 132-2: The fifth section

[0052] 132-3: Section 6

[0053] 133: Magnetic components

[0054] 133-1: Surface of magnetic components

[0055] 134: Magnetic element

[0056] 140: first sensing component

[0057] 141: first sensing element

[0058] 141-1: Reference Department

[0059] 141-2: Magnetization

[0060] 150: Movable part

[0061] 151: Upper cover

[0062] 152: Shading element

[0063] 153: Frame

[0064] 153-a: convex column

[0065] 154: Carriage

[0066] 160:Fixed part

[0067] 161: Base

[0068] 162: Bottom plate

[0069] 163: bottom shell

[0070] 170:Drive unit

[0071] 171, 172: Coil

[0072] 180: Second sensing component

[0073] 181: Second sensing element

[0074] 182:Magnetic element

[0075] 190: Second Frame

[0076] 200: Control unit

[0077] 201: Control elements

[0078] 202: Communication Components

[0079] 210: First Database

[0080] 220: Second database

[0081] 230: Third database

[0082] P1: Magnetic pole arrangement direction

[0083] D1: First Dimension

[0084] D2: The Second Dimension

[0085] S1: First sensing signal

[0086] S2: Second sensing signal

[0087] X, Y, Z: axis DETAILED DESCRIPTION

[0088] Various embodiments are described with reference to the accompanying drawings, and similar reference symbols are used to designate similar or equivalent elements throughout the accompanying drawings. The accompanying drawings are not drawn to scale, and the accompanying drawings are provided only to show the characteristics and features of the present disclosure. It should be understood that many specific details, relationships and methods are set forth to provide a comprehensive understanding. However, it will be easily appreciated by those skilled in the art that various embodiments can be practiced without one or more specific details or in other methods. In some cases, for illustrative purposes, known structures or operations are not shown in detail. Various embodiments are not limited to the order in which actions or events are displayed, as some actions can occur in different orders and / or simultaneously with other actions or events. In addition, not all of the actions or events shown are required for implementing certain features and characteristics of the present disclosure.

[0089] For purposes of this embodiment, the singular includes the plural and vice versa unless expressly stated otherwise. The term "including" means "including, but not limited to." In addition, approximate words such as "about," "almost," "substantially," and "approximately," and the like, may mean, for example, "at," "near," "nearly at," "within 3-5% of," "within acceptable manufacturing tolerances," or any logical combination thereof. Additionally, the terms "vertical" or "horizontal" are intended to further include "within 3-5%" of the vertical or horizontal direction, respectively. In addition, directional words such as "top," "bottom," "left," "right," "above," and "below" are intended to be relative to equivalent directions depicted in reference illustrations; to be understood from the context of the referenced object or element, such as from a common position of the object or element; or other descriptions thereof.

[0090] It is understood that although the terms "first", "second", etc. may be used herein to describe various elements, layers and / or parts, these elements, layers and / or parts should not be limited by these terms, and these terms are only used to distinguish different elements, layers and / or parts. Therefore, a first element, layer and / or part discussed below may be referred to as a second element, layer and / or part without departing from the teachings of some embodiments of the present disclosure. In addition, for the sake of brevity, the terms "first", "second", etc. may not be used in the specification to distinguish different elements. Without violating the scope defined by the attached claims, the first element and / or second element recorded in the claims may be interpreted as any element that conforms to the description in the specification.

[0091] It should be noted that the technical solutions provided in the following different embodiments can be replaced, combined or mixed with each other to form another embodiment without violating the spirit of the present disclosure.

[0092] The present disclosure relates to an optical element driving mechanism, which drives a movable part to drive an optical element, thereby adjusting the photographic imaging of an optical system to meet different photographic requirements.

[0093] First, please refer to Figure 1 , Figure 2 , Figure 3 . Figure 1 1 is a front perspective view of an optical element driving mechanism 1 according to certain features of the present disclosure. Figure 2 FIG. 1 is a rear perspective view of an optical element driving mechanism 1 according to certain features of the present disclosure. Figure 3 The present invention is a front exploded perspective view of an optical element driving mechanism 1 according to certain features of the present disclosure.

[0094] The optical element driving mechanism 1 includes a movable portion 110, a first frame 120, a driving component 130, a first sensing component 140, a movable portion 150, a fixed portion 160, a driving unit 170, a second sensing component 180, a second frame 190, a control unit 200, a first database 210, a second database 220 and a third database 230 (shown in FIG. Fig.14 ).

[0095] The movable part 110 is used to connect the optical element 10. The optical element 10 can be, for example, a blade, a filter, a lens, a photosensitive element, etc. In this embodiment, the optical element 10 is a blade, and six optical elements 10 form an aperture. Each optical element 10 has a hole 10-a and a long hole 10-b for connecting the movable part 110 and the movable part 150, as will be further explained below.

[0096] The movable part 110 and the optical element 10 can move relative to the first frame 120. The movable part 110 has a movable part body 111 and a plurality of connecting elements 112. The connecting elements 112 are used to movably connect the movable part 110 and the fixed part 160, as described below with respect to Figure 4 Further explanation: The movable body 111 has a plurality of protrusions 111 - b , which penetrate into the long hole 10 - b of the optical element 10 and can move in the long hole 10 - b .

[0097] The first frame 120 is disposed on an optical module (not shown, for example, a camera module, etc.), and the first frame 120 is fixedly connected to the fixing portion 160 .

[0098] The driving assembly 130 has a first coil 131, a second coil 132, a magnetic element 133 and a magnetic conductive element 134. The driving assembly 130 is used to drive the movable portion 110 to move relative to the first frame 120, as will be described below. Figures 7 to 9 Further explanation: Part of the driving assembly 130 , specifically the first coil 131 and the second coil 132 are fixedly connected to the first frame 120 . The magnetic conductive element 134 is fixed between the magnetic element 133 and the movable part 150 to prevent the magnetic field from interfering with the movement of the movable part 110 .

[0099] The first sensing assembly 140 has a first sensing element 141 fixedly disposed on the first frame 120 for sensing the movement of the movable portion 110 .

[0100] The movable part 150 is movably connected to the active part 110 and the fixed part 160. The movable part 150 is used to connect an optical unit 20 (for example, a lens). The movable part 150 can move relative to the fixed part 160. The movable part 150 includes an upper cover 151, a shading element 152, an outer frame 153 and a carrying part 154. The upper cover 151 is located above the optical element 10. The shading element 152 is located below the optical element 10 and can have a material such as SOMA to prevent light leakage. The outer frame 153 has a plurality of protrusions 153-a, which penetrate into the hole 10-a of the optical element 10 and can rotate in the hole 10-a. The second frame 190 is fixedly connected to the movable part 150 through the carrying part 154, and the second frame 190 can be used to carry the active part 110 and the outer frame 153.

[0101] The plurality of protrusions 111-b of the movable body 111 penetrate into the long hole 10-b of the optical element 10 and move in the long hole 10-b, and the plurality of protrusions 153-a of the outer frame 153 penetrate into the hole 10-a of the optical element 10 and rotate in the hole 10-a. The optical element 10 connects the movable body 111 and the outer frame 153.

[0102] When the movable body 111 is driven by the driving assembly 130 to move, the boss 111-b of the movable body 111 moves in the long hole 10-b, and the boss 153-a of the outer frame 153 rotates in the hole 10-a, thereby driving the movement of the optical element 10. By moving the optical element 10, the size of the aperture formed by the optical element 10 can be adjusted.

[0103] The fixing portion 160 includes a base 161, a bottom plate 162, and a bottom shell 163. The base 161 and the bottom shell 163 are attached to the bottom plate 162. The bottom shell 163 and the bottom plate 162 surround the base 161 and the driving unit 170 to block external impact. The driving assembly 130 and the driving unit 170 are located on different sides of the fixing portion 160.

[0104] The driving unit 170 is used to drive the movable part 150 to move relative to the fixed part 160. The driving unit 170 includes a coil 171 and a coil 172, which are disposed on both sides of the base 161, and the movable part 150 is respectively provided with a magnetic unit (not shown) on the side corresponding to the coil 171 and the coil 172, so that the movable part 150 and the movable part 110 can be driven to move relative to the first frame 120, as will be described below. Figures 11 to 13 Further explanation.

[0105] The second sensing component 180 is used to sense the movement of the movable part 150 . The second sensing component 180 includes a second sensing element 181 and a magnet element 182 . The second sensing element 181 and the magnet element 182 are both fixed to the base 161 of the fixed part 160 .

[0106] The control unit 200 includes a control element 201 and a communication element 202. The control element 201 is disposed on the first frame 120, and is used to output a control signal to the driving assembly 130 to drive the movable portion 110. The communication element 202 is located between the movable portion 150 and the movable portion 110, and is used to transmit the control signal to the driving unit 170 to drive the movable portion 150 and the movable portion 110.

[0107] Please refer to the following Figure 4 . Figure 4 A rear perspective view of the optical element driving mechanism 1 according to certain features of the present disclosure, wherein for illustrative purposes, the outer frame 153 of the movable portion 150 is not combined with the movable portion body 111 of the movable portion 110 , and the first frame 120 is shown in dotted lines.

[0108] After the outer frame 153 of the movable part 150 is combined with the movable part body 111 of the movable part 110, the connecting element 112 of the movable part 110 movably connects the movable part 150 and the movable part 110. In this embodiment, the connecting element 112 is four spheres. When the movable part body 111 is driven by the driving assembly 130 to move, the connecting element 112 rolls between the outer frame 153 and the movable part body 111, so that the movable part body 111 moves smoothly relative to the outer frame 153.

[0109] Please refer to the following Figure 5 as well as Figure 6 . Figure 5 FIG. 1 is a rear perspective view of a driving assembly 130 and a first sensing element 141 of a first sensing assembly 140 according to certain features of the present disclosure. Figure 6 FIG. 1 is a rear view of the driving assembly 130 and the first sensing element 141 of the first sensing assembly 140 according to certain features of the present disclosure.

[0110] In this embodiment, the first coil 131 and the second coil 132 are fixed to the first frame 120 , and the magnetic element 133 is fixed to the movable portion 110 .

[0111] The first coil 131 corresponds to the magnetic element 133 and has a first section 131-1, a second section 131-2 and a third section 131-3. The first section 131-1 is connected to the third section 131-3 via the second section 131-2. The first section 131-1 is not parallel to the second section 131-2. The third section 131-3 is not parallel to the second section 131-2.

[0112] The second coil 132 corresponds to the magnetic element 133 and has a fourth section 132-1, a fifth section 132-2 and a sixth section 132-3. The fourth section 132-1 is connected to the sixth section 132-3 via the fifth section 132-2. The fourth section 132-1 is not parallel to the fifth section 132-2. The sixth section 132-3 is not parallel to the fifth section 132-2.

[0113] The magnetic element 133 is fixed to the movable part body 111 of the movable part 110 (at Figure 5 , Figure 6 The magnetic element 133 has a magnetic element surface 133-1 facing the first section 131-1 (the first section 131-1 overlaps with the magnetic element surface 133-1 in the X direction). A magnetic pole arrangement direction P1 of the magnetic element 133 passes through the magnetic element surface 133-1.

[0114] Please see Figure 6 When observed along a direction perpendicular to the magnetic element surface 133 - 1 , the magnetic element surface 133 - 1 does not overlap with the third section 131 - 3 , and the magnetic element surface 133 - 1 does not completely cover the second section 131 - 2 .

[0115] The first sensing element 141 of the first sensing component 140 is disposed between the first coil 131 and the second coil 132. The first sensing element 141 corresponds to the magnetic element 133. The first sensing element 141 includes a reference portion 141-1 and a magnetized portion 141-2. The reference portion 141-1 has a fixed magnetic field direction. The magnetized portion 141-2 can change the magnetic field direction according to the direction of the surrounding magnetic field.

[0116] Please refer to the following Figures 7 to 10 .

[0117] Figure 7 According to certain features of the present disclosure, a rear perspective view of the optical element driving mechanism 1 is shown, wherein the movable portion 110 is located at a preset position, and for illustrative purposes, the upper cover 151 and the first frame 120 are shown in dotted lines.

[0118] Figure 8 According to certain features of the present disclosure, a rear perspective view of the optical element driving mechanism 1 is shown, wherein the movable portion 110 is located at a first extreme position, and for illustrative purposes, the upper cover 151 and the first frame 120 are shown in dotted lines.

[0119] Fig. 9 According to certain features of the present disclosure, a rear perspective view of the optical element driving mechanism 1 is shown, wherein the movable portion 110 is located at a second extreme position, and for illustrative purposes, the upper cover 151 and the first frame 120 are shown in dotted lines.

[0120] Fig.10 The figure is a relationship diagram between the change in the angle between the magnetic pole arrangement direction P1 of the magnetic element 133 and the fixed magnetic field direction of the reference portion 141 - 1 of the sensing element 141 and the resistance according to certain features of the present disclosure.

[0121] The driving assembly 130 is used to drive the movable portion 110 to move in a first dimension D1 relative to the first frame 120. Specifically, through the electromagnetic driving force generated by the first coil 131 and the second coil 132 of the driving assembly 130 and the magnetic element 133, the magnetic element 133 drives the movable portion 110 to move in the first dimension D1 relative to the first frame 120, and drives the movement of the optical element 10, thereby adjusting the aperture size formed by the optical element 10.

[0122] The movable portion 110 can move relative to the first frame 120 within a movable portion movement range. The movable portion movement range is from a first extreme position (i.e. Figure 8 shown position) and a second extreme position (i.e. Fig. 9 The position shown is defined as follows. Figure 8 In the first extreme position shown, the aperture formed by the optical element 10 is the smallest, achieving the minimum amount of light entering. Fig. 9 In the second extreme position shown, the aperture formed by the optical element 10 is the largest, achieving the maximum amount of light entering.

[0123] A preset position of the active part is defined within the range of motion of the active part ( Figure 7 In this embodiment, the preset position of the movable part is located in the middle part of the third equal part of the movable part motion range. That is, the preset position of the movable part ( Figure 7 The position) is located at the first extreme position ( Figure 8 position) and the second extreme position ( Fig. 9 within the middle part of the range divided into three equal parts).

[0124] Please refer to the following Fig.10 .Depend on Fig.10 It can be known that there is a relationship between the change in the angle between the magnetic pole arrangement direction P1 of the magnetic element 133 and the fixed magnetic field direction of the reference portion 141 - 1 of the sensing element 141 and the resistance.

[0125] When the angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction is 0 degrees, the magnetic field direction of the magnetized portion 141-2 of the first sensing element 141 is parallel to the fixed magnetic field direction of the reference portion 141-1, and at this time, the first sensing element 141 is not subject to resistance. When the angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction continues to increase, the resistance to the first sensing element 141 also increases. When the angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction is 45 degrees, the magnetic field direction of the magnetized portion 141-2 of the first sensing element 141 is affected by the magnetic pole arrangement direction P1 of the magnetic element 133, and is 45 degrees to the fixed magnetic field direction of the reference portion 141-1, and at this time, the first sensing element 141 is subject to some resistance. When the angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction is 180 degrees, the magnetic field direction of the magnetized portion 141-2 of the first sensing element 141 is affected by the magnetic pole arrangement direction P1 of the magnetic element 133, and is 180 degrees with the fixed magnetic field direction of the reference portion 141-1. At this time, the first sensing element 141 is subjected to the greatest resistance.

[0126] When the angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction continues to increase after 180 degrees, the resistance of the first sensing element 141 begins to decrease. When the angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction is 225 degrees, the magnetic field direction of the magnetized portion 141-2 of the first sensing element 141 is affected by the magnetic pole arrangement direction P1 of the magnetic element 133, and is 225 degrees with the fixed magnetic field direction of the reference portion 141-1. At this time, the first sensing element 141 is subjected to a smaller resistance than when it is 180 degrees. When the angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction continues to increase, the resistance of the first sensing element 141 continues to decrease. When the angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction is 360 degrees, the magnetic field direction of the magnetized portion 141-2 of the first sensing element 141 is parallel to the fixed magnetic field direction of the reference portion 141-1. At this time, the first sensing element 141 is not subjected to resistance.

[0127] Please see the resistance curve in the figure, the angle between the magnetic pole arrangement direction P1 of the magnetic element 133 and the fixed magnetic field direction is a line segment of 0 to 180 degrees. Observing the resistance curve with an angle of 0 to 180 degrees, the resistance curves with angles of 0 to 45 degrees and 135 to 180 degrees are nonlinear, and the resistance line segment with an angle of 45 to 135 degrees (indicated by a thick line) is approximately linear.

[0128] When the first sensing element 141 senses the magnetic element 133 , the linear resistance line segment makes the sensing and calculation data more accurate. Therefore, the angle between the magnetic pole arrangement direction P1 of the magnetic element 133 and the fixed magnetic field direction is preferably 45 degrees to 135 degrees.

[0129] In this embodiment, to optimize the accuracy of the sensing element 141 , when the movable portion 110 is located at any position within the movable portion motion range, the angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction of the reference portion 141 - 1 is neither 0 degree nor 180 degrees.

[0130] That is, when the movable portion 110 is located at the first limit position ( Figure 8 ), the angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction of the reference portion 141-1 is not 0 degrees or 180 degrees, and when the movable portion 110 is located at the second extreme position ( Fig. 9 When the magnetic pole arrangement direction P1 is at the position shown in the figure, the angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction of the reference portion 141 - 1 is not 0 degree or 180 degrees.

[0131] When the movable portion 110 is located at the movable portion preset position ( Figure 7 When the movable portion 110 is at the preset position of the movable portion, the angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction of the reference portion 141-1 is between 60 degrees and 120 degrees. When the movable portion 110 is at the preset position of the movable portion, the angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction of the reference portion 141-1 is 90 degrees.

[0132] Please refer to the following Figures 11 to 13 .

[0133] Fig.11 In accordance with certain features of the present disclosure, a rear stereoscopic view of the optical element driving mechanism 1 is shown, wherein the movable portion 150 is located at a preset position, and for illustrative purposes, elements such as the optical element 10, the outer frame 153, the upper cover 151 and the first frame 120 are removed, and the bottom shell 163 is shown in dotted lines.

[0134] Fig.12 In accordance with certain features of the present disclosure, a rear stereoscopic view of the optical element driving mechanism 1 is shown, wherein the movable portion 150 is located at a first calibration position, and for illustrative purposes, elements such as the optical element 10, the outer frame 153, the upper cover 151 and the first frame 120 are removed, and the bottom shell 163 is shown in dotted lines.

[0135] Fig.13 In accordance with certain features of the present disclosure, a rear stereoscopic view of the optical element driving mechanism is shown, wherein the movable portion 150 is located at a second calibration position, and for illustrative purposes, elements such as the optical element 10, the outer frame 153, the upper cover 151 and the first frame 120 are removed, and the bottom shell 163 is shown in dotted lines.

[0136] The driving unit 170 is used to drive the movable portion 110 (not shown for illustrative purposes), the movable portion 150 and the second frame 190 to move relative to the fixed portion 160 in a second dimension D2 .

[0137] In detail, the electromagnetic driving force generated by the coil 171 and the coil 172 of the driving unit 170 and the magnetic unit (not shown) disposed on the movable part 150 drives the movable part 110, the movable part 150 and the second frame 190 to move in the second dimension D2 relative to the fixed part 160, and drives the movement of the optical unit 20, thereby adjusting the position of the optical unit 20 to adjust the focal length of, for example, a lens.

[0138] Preset position of movable part ( Fig.11 The position shown) and the first calibration position ( Fig.12 The preset position of the movable part is different from the second calibration position ( Fig.13 The first calibration position and the second calibration position are different, and the preset position of the movable part is located between the first calibration position and the second calibration position.

[0139] Please refer to the following Fig.14 . Fig.14 A block diagram of a control unit 200 , a first database 210 , a second database 220 , and a third database 230 of an optical element driving mechanism 1 according to certain features of the present disclosure.

[0140] The first database 210 is used to record the relationship between the position of the movable part 110 and a first sensing signal S1 output by the first sensing component 140. The second database 220 is used to record the relationship between the position of the movable part 150 and a second sensing signal S2 output by the second sensing component 180. The third database 230 is used to record the correlation between the first database 210 and the second database 220.

[0141] When calibrating the optical element driving mechanism 1, first fix the movable part 150 at a preset position ( Fig.11 The movable part 110 is rotated to obtain the first set of data and recorded in the third database 230. Therefore, the third database 230 includes multiple positions (for example, Figure 8 The first limit position shown, Fig. 9 The second limit position shown, Figure 7 The relationship between the preset position of the movable part shown in the figure and the first sensing signal S1.

[0142] When the second calibration phase of the optical element driving mechanism 1 is performed, the movable part 150 is changed and fixed, and then the movable part 110 is rotated again to obtain a second set of data, which is recorded in the third database 230. Therefore, the third database 230 includes the data when the movable part 150 is located at the first calibration position ( Fig.12When the movable portion 110 is located at a plurality of positions within the range of motion of the movable portion (for example, Figure 8 The first limit position shown, Fig. 9 The second limit position shown, Figure 7 The relationship between the preset position of the movable part shown in the figure and the first sensing signal S1.

[0143] When the third calibration stage of the optical element driving mechanism 1 is performed, the movable part 150 is changed and fixed, and then the movable part 110 is rotated again to obtain a third set of data, which is recorded in the third database 230. Therefore, the third database 230 includes the data when the movable part 150 is located at the second calibration position ( Fig.13 When the movable portion 110 is located at a plurality of positions within the range of motion of the movable portion (for example, Figure 8 The first limit position shown, Fig. 9 The second limit position shown, Figure 7 The relationship between the preset position of the movable part shown in the figure and the first sensing signal S1.

[0144] A control signal is output to the control unit 200 according to the first sensing signal S1 , the second sensing signal S2 and the first database 210 , the second database 220 and the third database 230 to drive the movable part 110 .

[0145] In summary, the optical system of the embodiment of the present disclosure can make the movable part move smoothly relative to the fixed part, and can drive the movable part through the driving component to change the size of the opening formed by the optical element, thereby adjusting the amount of light entering, and drive the movable part through the driving unit to change the position of the movable part, thereby adjusting the focal length of the lens.

[0146] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meanings as commonly understood by those skilled in the art to which this disclosure belongs. It is understood that these terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the background or context of the relevant technology and the present disclosure, and should not be interpreted in an idealized or overly formal manner unless specifically defined herein.

[0147] Although the embodiments and advantages of the present disclosure have been disclosed as above, it should be understood that those skilled in the art may make changes, substitutions and modifications without departing from the spirit and scope of the present disclosure. In addition, the scope of protection of the present disclosure is not limited to the processes, machines, manufactures, material compositions, devices, methods and steps in the specific embodiments described in the specification. Any technician in the relevant technical field can understand the current or future developed processes, machines, manufactures, material compositions, devices, methods and steps from the disclosure of the present disclosure. As long as they can implement substantially the same functions or obtain substantially the same results in the embodiments described herein, they can be used according to the present disclosure. Therefore, the scope of protection of the present disclosure includes the above-mentioned processes, machines, manufactures, material compositions, devices, methods and steps. In addition, each claim constitutes an individual embodiment, and the scope of protection of the present disclosure also includes the combination of each claim and embodiment.

Claims

1. An optical element driving mechanism, comprising: A movable portion, used to connect an optical element; a first frame, the movable portion being movable relative to the first frame; a driving assembly, for driving the movable portion to move relative to the first frame; as well as A first sensing component is used to sense the movement of the movable part.

2. The optical element driving mechanism as claimed in claim 1, further comprising a second frame and an optical module, wherein the first frame is disposed on the optical module, and the optical module comprises: a movable part for connecting to an optical unit; a fixed portion, the movable portion being movable relative to the fixed portion; a driving unit for driving the movable part to move relative to the fixed part; as well as a second sensing component, for sensing the movement of the movable part; wherein the second frame is fixedly connected to the movable part; A portion of the drive assembly is fixedly connected to the first frame; The first frame is fixedly connected to the fixing portion, and the driving assembly and the driving unit are located at different sides of the fixing portion.

3. The optical element driving mechanism as claimed in claim 2, wherein the driving assembly comprises: A first coil having a first section, a second section and a third section; A magnetic element having a magnetic element surface facing the first section; as well as a second coil, corresponding to the magnetic element, having a fourth section, a fifth section and a sixth section; wherein the first section is connected to the third section via the second section; The first section is not parallel to the second section; The third section is not parallel to the second section; When viewed along a direction perpendicular to the surface of the magnetic element, the surface of the magnetic element does not overlap with the third section; When viewed along a direction perpendicular to the surface of the magnetic element, the surface of the magnetic element does not completely cover the second section; The fourth section is connected to the sixth section via the fifth section; The fourth section is not parallel to the fifth section; The sixth section is not parallel to the fifth section; A magnetic pole arrangement direction of the magnetic element passes through the surface of the magnetic element.

4. The optical element driving mechanism as claimed in claim 3, wherein a first sensing element of the first sensing component is disposed between the first coil and the second coil; The first sensing element corresponds to the magnetic element, and the first sensing element includes: A reference part having a fixed magnetic field direction; A magnetized portion capable of changing the direction of the magnetic field according to the direction of the surrounding magnetic field; The driving assembly is used to drive the movable portion to move in a first dimension relative to the first frame; The driving unit is used for driving the active part and the movable part to move in a second dimension relative to the fixed part.

5. The optical element driving mechanism as claimed in claim 4, wherein the movable portion can move relative to the first frame within a movable portion movement range; The motion range of the movable part is defined by a first limit position and a second limit position; When the movable portion is located at the first extreme position, the angle between the magnetic pole arrangement direction and the fixed magnetic field direction is not 0 degree or 180 degrees; When the movable portion is located at the second extreme position, the angle between the magnetic pole arrangement direction and the fixed magnetic field direction is not 0 degree or 180 degrees; When the movable part is located at any position within the moving range of the movable part, the angle between the magnetic pole arrangement direction and the fixed magnetic field direction is neither 0 degree nor 180 degrees.

6. The optical element driving mechanism according to claim 5, wherein: A preset position of the movable part is defined within the range of motion of the movable part; The preset position of the movable part is located in the middle part of the third equal parts of the range of motion of the movable part; When the movable portion is located at the movable portion preset position, the angle between the magnetic pole arrangement direction and the fixed magnetic field direction is between 60 degrees and 120 degrees; When the movable part is located at the preset position of the movable part, the angle between the magnetic pole arrangement direction and the fixed magnetic field direction is 90 degrees; The movable part can move relative to the fixed part within a movable part movement range.

7. The optical element driving mechanism according to claim 5, further comprising: a first database for recording the relationship between the position of the movable portion and a first sensing signal output by the first sensing component; a second database for recording the relationship between the position of the movable part and a second sensing signal output by the second sensing component; as well as A third database is used to record the correlation between the first database and the second database.

8. The optical element driving mechanism according to claim 7, wherein: The third database includes the relationship between a plurality of positions of the movable part within the moving range of the movable part and the first sensing signal when the movable part is located at a preset movable part position.

9. The optical element driving mechanism according to claim 8, wherein: The third database includes a relationship between a plurality of positions of the movable portion within the range of motion of the movable portion and the first sensing signal when the movable portion is located at a first calibration position; The preset position of the movable portion is different from the first calibration position; The third database includes a relationship between a plurality of positions of the movable portion within the range of motion of the movable portion and the first sensing signal when the movable portion is located at a second calibration position; The preset position of the movable portion is different from the second calibration position; The first calibration position and the second calibration position are different, and the preset position of the movable part is located between the first calibration position and the second calibration position. 10 . The optical element driving mechanism as claimed in claim 7 , further comprising a control unit for outputting a control signal to drive the movable part according to the first sensing signal, the second sensing signal and the first database, the second database and the third database.

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