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 utility model 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 current electronic devices (such as laptop computers, smart phones or digital cameras) have the functions of taking pictures or videos. The use of these electronic devices is becoming more and more common. While developing more stable and better optical quality, they are also moving towards convenient and thin-and-light designs to provide users with more choices.

[0003] An optical component is needed that allows adjustment of the optical photography focal length to adapt to different external photography requirements. However, when an optical element with a longer focal length (such as a lens) needs to be arranged in the aforementioned electronic device, it will cause an increase in the thickness of the electronic device, which is not conducive to the thin-and-light and stability of the electronic device. In view of this, how to design an optical element driving mechanism that can make the electronic device thin-and-light and stable has become an important issue. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an optical element driving mechanism to solve at least one of the above problems.

[0005] The terms of the embodiments and similar terms (such as embodiments, configurations, features, examples, and options) are intended to generally refer to all the subject matters of the present utility model and the following claims. Several statement items containing these terms should be understood as not limiting the subject matters described herein or the meaning or scope of the following claims. The embodiments of the present utility model covered herein are defined by the following claims, rather than the content of the present utility model. The content of this utility model is a high-level overview of various features of the present utility model and introduces some concepts described in more detail in the following embodiment paragraphs. The content of this utility model is not intended to identify the key or essential features of the claim subject matter, nor is it intended to be used independently to determine the scope of the claim subject matter. The subject matter should be understood by referring to the appropriate parts of the complete specification of the present utility model, any or all of the drawings, and each claim.

[0006] To solve the above-mentioned well-known problems, according to certain features of the present disclosure, an optical element driving mechanism is provided, including 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. The first frame is disposed 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. A 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 driving 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 and the second section are not parallel. The third section and the second section are not parallel. When viewed along the direction perpendicular to the magnetic element surface, the magnetic element surface does not overlap with the third section. When viewed along the direction perpendicular to the magnetic element surface, the magnetic element surface does not completely cover the second section. The fourth section is connected to the sixth section via the fifth section. The fourth section and the fifth section are not parallel. The sixth section and the fifth section are not parallel. A magnetic pole arrangement direction of the magnetic element passes through the magnetic element surface.

[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 part and a magnetized part. The reference part has a fixed magnetic field direction. The magnetized part can change the magnetic field direction according to the direction of the surrounding magnetic field. The driving component is used to drive the movable part to move relative to the first frame in a first dimension. The driving unit is used to drive the movable part and the movable part to move relative to the fixed part in a second dimension.

[0010] According to certain features of the present disclosure, the movable part can move relative to the first frame within a movable part movement range. The movable part movement range is defined by a first limit position and a second limit position. When the movable part is located at the first limit position, the included 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 limit position, the included 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 movement range, the included 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 movement range of the movable part. The preset position of the movable part is located in the middle part of the three equal parts of the movement range of the movable part. When the movable part is located at the preset position of the movable part, the included 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 included 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 movement range of the movable part.

[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 the relationship between multiple positions of the movable part within the movement range of the movable part and the first sensing signal when the movable part is located at a preset position of the movable part.

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

[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, the first database, the second database, and the third database.

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

[0017] The above description of the utility model content is not intended to present every embodiment or every feature of the present utility model. Instead, the foregoing utility model content only provides examples of some novel features and characteristics described herein. When combined with the accompanying drawings and the appended claims, the above features and advantages of the present utility model, as well as other features and advantages, will become apparent from the following detailed description of the representative embodiments and modes for implementing the present utility model. Given the detailed description of the various embodiments with reference to the accompanying drawings and the following simple description of the symbols provided, additional features of the present utility model will be apparent to those skilled in the art. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0020] Figure 2 Rear perspective view of the optical element driving mechanism according to certain features of the present disclosure.

[0021] Figure 3 Front exploded perspective view of the optical element driving mechanism according to certain features of the present disclosure.

[0022] Figure 4 Rear perspective view of the optical element driving mechanism according to certain features of the present disclosure, wherein for illustrative purposes, the outer frame of the movable part and the movable part body of the movable part are not combined, and the first frame is shown in dashed lines.

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

[0024] Figure 6 Rear view of the driving assembly and the sensing element of the first sensing assembly according to certain features of the present disclosure.

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

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

[0027] Figure 9 A rear perspective view of an optical element driving mechanism according to certain features of the present disclosure, wherein the movable part is located at a second limit position. For illustrative purposes, the upper cover and the first frame are shown in dashed lines.

[0028] Figure 10 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 part of the sensing element and the resistance according to certain features of the present disclosure.

[0029] Figure 11 A rear perspective view of an optical element driving mechanism according to certain features of the present disclosure, wherein the movable part is located at a preset position. For illustrative purposes, elements such as the optical element, the outer frame, the upper cover, and the first frame are removed, and the bottom case is shown in dashed lines.

[0030] Figure 12 A rear perspective view of an optical element driving mechanism according to certain features of the present disclosure, wherein the movable part is located at a first calibration position. For illustrative purposes, elements such as the optical element, the outer frame, the upper cover, and the first frame are removed, and the bottom case is shown in dashed lines.

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

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

[0033] The reference numerals are as follows:

[0034] 1: Optical element driving mechanism

[0035] 10: Optical element

[0036] 10-a: Hole

[0037] 10-b: Slot

[0038] 20: Optical unit

[0039] 110: Movable part

[0040] 111: Movable part body

[0041] 111-b: Convex post

[0042] 112: Connecting element

[0043] 120: First frame

[0044] 130: Driving component

[0045] 131: First coil

[0046] 131-1: First segment

[0047] 131-2: Second segment

[0048] 131-3: Third segment

[0049] 132: Second coil

[0050] 132-1: Fourth segment

[0051] 132-2: Fifth segment

[0052] 132-3: Sixth segment

[0053] 133: Magnetic component

[0054] 133-1: Surface of magnetic component

[0055] 134: Permeable component

[0056] 140: First sensing component

[0057] 141: First sensing element

[0058] 141-1: Reference part

[0059] 141-2: Magnetization part

[0060] 150: Movable part

[0061] 151: Upper cover

[0062] 152: Light-shielding element

[0063] 153: Outer frame

[0064] 153-a: Convex post

[0065] 154: Carrying part

[0066] 160: Fixing part

[0067] 161: Base

[0068] 162: Bottom plate

[0069] 163: Bottom case

[0070] 170: Driving unit

[0071] 171, 172: Coils

[0072] 180: Second sensing component

[0073] 181: Second sensing element

[0074] 182: Magnet element

[0075] 190: Second frame

[0076] 200: Control unit

[0077] 201: Control element

[0078] 202: Communication element

[0079] 210: First database

[0080] 220: Second database

[0081] 230: Third database

[0082] P1: Magnetic pole arrangement direction

[0083] D1: First dimension

[0084] D2: Second dimension

[0085] S1: First sensing signal

[0086] S2: Second sensing signal

[0087] X, Y, Z: Axes Detailed implementation manners

[0088] Multiple embodiments are described with reference to the accompanying drawings, and like reference signs are used throughout the drawings to designate like or equivalent elements. The drawings are not drawn to scale and are provided only to show the features and characteristics of the present disclosure. It should be understood that many specific details, relationships, and methods are set forth to provide a thorough understanding. However, those skilled in the art will readily conceive that the multiple embodiments may be practiced without one or more of the specific details or in other ways. In some cases, well-known structures or operations are not shown in detail for illustrative purposes. The multiple embodiments are not limited to the order of display of actions or events, as some actions may occur in a different order and / or simultaneously with other actions or events. Additionally, not all of the shown actions or events are required to implement certain features and characteristics of the present disclosure.

[0089] For the purposes of the present embodiment, unless explicitly stated otherwise, the singular includes the plural and vice versa. The term "comprising" means "including but not limited to". In addition, approximate terms such as "bout, almost, substantially, approximately" and their like may herein 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 respectively additionally include "within 3-5%" of the vertical or horizontal direction. Further, directional terms such as "top", "bottom", "left", "right", "above" and "below" are intended to relate to the equivalent directions depicted in the reference drawings; understood from the context of the reference object or element, such as from the normal position of the object or element; or such other description.

[0090] It is understood that although terms such as "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. Thus, 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. Additionally, for the sake of brevity, the terms "first", "second" etc. may not be used in the specification to distinguish different elements. Without departing from the scope defined by the appended claims, the first element and / or the second element recited in the claims may be construed as any element that conforms to the description in the specification.

[0091] It should be noted that the technical solutions provided in different embodiments hereinafter may be mutually replaced, combined or mixed for use to constitute another embodiment without violating the spirit of the present disclosure.

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

[0093] First, please refer to Figure 1 、 Figure 2 、 Figure 3 。 Figure 1 A front perspective view of the optical element driving mechanism 1 according to certain features of the present disclosure. Figure 2 A rear perspective view of the optical element driving mechanism 1 according to certain features of the present disclosure. Figure 3 A front exploded perspective view of the optical element driving mechanism 1 according to certain features of the present disclosure.

[0094] The optical element driving mechanism 1 includes a movable part 110, a first frame 120, a driving component 130, a first sensing component 140, a movable part 150, a fixed part 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 Figure 14 ).

[0095] The movable part 110 is used to connect the optical element 10. The optical element 10 can be, for example, a vane, a filter, a lens, a photosensitive element, etc. In this embodiment, the optical element 10 is a vane, and six optical elements 10 form a diaphragm. Each of the optical elements 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 main 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 will be further explained below with respect to Figure 4 . The movable part main body 111 has a plurality of protruding posts 111-b that penetrate into the long hole 10-b of the optical element 10 and can move within the long hole 10-b.

[0097] The first frame 120 is disposed in an optical module (not shown, such as a camera module, etc.), and the first frame 120 is fixedly connected to the fixed part 160.

[0098] The driving component 130 has a first coil 131, a second coil 132, a magnetic element 133, and a magnetic conductive element 134. The driving component 130 is used to drive the movable part 110 to move relative to the first frame 120, as will be further explained below with reference to Figures 7 to 9 . A part of the driving component 130, specifically the first coil 131 and the second coil 132, is 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 magnetic field interference with the movement of the movable part 110.

[0099] The first sensing component 140 has a first sensing element 141 that is fixedly disposed on the first frame 120 to sense the movement of the movable part 110.

[0100] The movable part 150 is movably connected to the movable 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 light-shielding element 152, an outer frame 153, and a loading part 154. The upper cover 151 is located above the optical element 10. The light-shielding element 152 is located below the optical element 10 and can be made of a material such as SOMA to prevent light leakage. The outer frame 153 has a plurality of protrusions 153-a that penetrate into the holes 10-a of the optical element 10 and can rotate within the holes 10-a. The second frame 190 is fixedly connected to the movable part 150 through the loading part 154, and the second frame 190 can be used to carry the movable part 110 and the outer frame 153.

[0101] A plurality of protrusions 111-b of the movable part main body 111 penetrate into the long holes 10-b of the optical element 10 and move within the long holes 10-b, and a plurality of protrusions 153-a of the outer frame 153 penetrate into the holes 10-a of the optical element 10 and rotate within the holes 10-a. The optical element 10 is connected to the movable part main body 111 and the outer frame 153.

[0102] When the movable part main body 111 is driven by the driving component 130 to move, the protrusions 111-b of the movable part main body 111 move within the long holes 10-b, and the protrusions 153-a of the outer frame 153 rotate within the holes 10-a, thereby driving the movement of the optical element 10. By moving the optical element 10, the aperture size formed by the optical element 10 can be adjusted.

[0103] The fixed part 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 impacts. The driving component 130 and the driving unit 170 are located on different sides of the fixed part 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 arranged on both sides of the base 161, and magnetic units (not shown in the figure) are respectively arranged on the sides of the movable part 150 corresponding to the coil 171 and the coil 172. Therefore, the movable part 150 and the movable part 110 can be driven to move relative to the first frame 120, as will be further explained below with reference to Figures 11 to 13 For 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 for outputting a control signal to the driving assembly 130 to drive the movable part 110. The communication element 202 is located between the movable part 150 and the movable part 110 for transmitting the control signal to the driving unit 170 to drive the movable part 150 and the movable part 110.

[0107] Next, please refer to Figure 4 。 Figure 4 For some features according to the present disclosure, a rear perspective view of the optical element driving mechanism 1, wherein for illustrative purposes, the outer frame 153 of the movable part 150 and the movable part main body 111 of the movable part 110 are not combined, and the first frame 120 is shown in dashed lines.

[0108] After the outer frame 153 of the movable part 150 and the movable part main body 111 of the movable part 110 are combined, 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 main 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 main body 111, so that the movable part main body 111 moves smoothly relative to the outer frame 153.

[0109] Next, please refer to Figure 5 and Figure 6 。 Figure 5 For some features according to the present disclosure, a rear perspective view of the driving assembly 130 and the first sensing element 141 of the first sensing assembly 140. Figure 6 For some features according to the present disclosure, a rear view of the driving assembly 130 and the first sensing element 141 of the first sensing assembly 140.

[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 part 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 and the second section 131-2 are not parallel. The third section 131-3 and the second section 131-2 are not parallel.

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

[0113] The magnetic element 133 is fixed to the movable portion main body 111 of the movable portion 110 (not shown in Figure 5 , Figure 6 ). The magnetic element 133 has a magnetic element surface 133-1 facing the first segment portion 131-1 (the first segment portion 131-1 and the magnetic element surface 133-1 overlap in the X direction). A magnetic pole arrangement direction P1 of the magnetic element 133 passes through the magnetic element surface 133-1.

[0114] See Figure 6 . When viewed along the direction perpendicular to the magnetic element surface 133-1, the magnetic element surface 133-1 does not overlap with the third segment portion 131-3, and the magnetic element surface 133-1 does not completely cover the second segment portion 131-2.

[0115] The first sensing element 141 of the first sensing assembly 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 magnetization portion 141-2. The reference portion 141-1 has a fixed magnetic field direction. The magnetization portion 141-2 can change the magnetic field direction according to the direction of the surrounding magnetic field.

[0116] Next, please refer to Figures 7 to 10 together.

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

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

[0119] Figure 9 is a rear perspective view of the optical element driving mechanism 1 according to certain features of the present disclosure, where the movable portion 110 is located at a second limit position. For illustrative purposes, the upper cover 151 and the first frame 120 are shown in dashed lines.

[0120] Figure 10 According to certain features of the present disclosure, it is a graph showing the 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.

[0121] The driving assembly 130 is used to drive the movable portion 110 to move relative to the first frame 120 in a first dimension D1. 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 relative to the first frame 120 in the first dimension D1, 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 defined by a first limit position (i.e., Figure 8 the position shown) and a second limit position (i.e., Figure 9 the position shown). At Figure 8 the first limit position shown, the aperture formed by the optical element 10 is the smallest, achieving the least amount of incident light. At Figure 9 the second limit position shown, the aperture formed by the optical element 10 is the largest, achieving the most amount of incident light.

[0123] A preset position of the movable portion ( Figure 7 the position) is defined within the movable portion movement range. In this embodiment, the preset position of the movable portion is located in the middle part of the one-third division of the movable portion movement range. That is, the preset position of the movable portion ( Figure 7 the position) is located within the middle part of the one-third division of the range between the first limit position ( Figure 8 the position) and the second limit position ( Figure 9 the position).

[0124] Next, please refer to Figure 10 . It can be known from Figure 10 the 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 included angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction is 0 degrees, the magnetic field direction of the magnetization part 141-2 of the first sensing element 141 is parallel to the fixed magnetic field direction of the reference part 141-1. At this time, the first sensing element 141 is not subject to resistance. When the included angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction continues to increase, the resistance received by the first sensing element 141 also increases. When the included angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction is 45 degrees, the magnetic field direction of the magnetization part 141-2 of the first sensing element 141 is affected by the magnetic pole arrangement direction P1 of the magnetic element 133 and forms an angle of 45 degrees with the fixed magnetic field direction of the reference part 141-1. At this time, the first sensing element 141 is subject to some resistance. When the included angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction is 180 degrees, the magnetic field direction of the magnetization part 141-2 of the first sensing element 141 is affected by the magnetic pole arrangement direction P1 of the magnetic element 133 and forms an angle of 180 degrees with the fixed magnetic field direction of the reference part 141-1. At this time, the first sensing element 141 is subject to the maximum resistance.

[0126] When the included angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction continues to increase after 180 degrees, the resistance received by the first sensing element 141 begins to decrease. When the included angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction is 225 degrees, the magnetic field direction of the magnetization part 141-2 of the first sensing element 141 is affected by the magnetic pole arrangement direction P1 of the magnetic element 133 and forms an angle of 225 degrees with the fixed magnetic field direction of the reference part 141-1. At this time, the first sensing element 141 is subject to less resistance than at 180 degrees. When the included angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction continues to increase, the resistance received by the first sensing element 141 continues to decrease. When the included angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction is 360 degrees, the magnetic field direction of the magnetization part 141-2 of the first sensing element 141 is parallel to the fixed magnetic field direction of the reference part 141-1. At this time, the first sensing element 141 is not subject to resistance.

[0127] Please refer to the resistance curve in the figure, which is the line segment of the included angle between the magnetic pole arrangement direction P1 of the magnetic element 133 and the fixed magnetic field direction from 0 degrees to 180 degrees. Observe the resistance curve from 0 degrees to 180 degrees. The resistance curves from 0 degrees to 45 degrees and from 135 degrees to 180 degrees are non-linear, and the resistance line segment from 45 degrees to 135 degrees (marked with 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 sensed and calculated data more accurate. Therefore, the included angle between the magnetic pole arrangement direction P1 of the magnetic element 133 and the fixed magnetic field direction is preferably from 45 degrees to 135 degrees.

[0129] In this embodiment, in order to optimize the accuracy of the sensing element 141, when the movable part 110 is at any position within the movement range of the movable part, the included angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction of the reference part 141-1 is not 0 degrees or 180 degrees.

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

[0131] When the movable part 110 is at the preset position of the movable part ( Figure 7 the position shown), since the preset position of the movable part is in the middle part of the three equal parts of the movement range of the movable part, the included angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction of the reference part 141-1 is between 60 degrees and 120 degrees. When the movable part 110 is at the preset position of the movable part, the included angle between the magnetic pole arrangement direction P1 and the fixed magnetic field direction of the reference part 141-1 is 90 degrees.

[0132] Next, please refer to Figures 11 to 13 .

[0133] Figure 11 A rear perspective view of the optical element driving mechanism 1 according to certain features of the present disclosure, where the movable part 150 is at a preset position. 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 case 163 is shown in dashed lines.

[0134] Figure 12 A rear perspective view of the optical element driving mechanism 1 according to certain features of the present disclosure, where the movable part 150 is at a first calibration position. 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 case 163 is shown in dashed lines.

[0135] Figure 13 A rear perspective view of the optical element driving mechanism according to certain features of the present disclosure, where the movable part 150 is at a second calibration position. 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 case 163 is shown in dashed lines.

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

[0137] Specifically, the electromagnetic driving force generated by the coils 171 and 172 of the driving unit 170 and a magnetic unit (not shown in the figure) provided on the movable part 150 drives the movable part 110, the movable part 150, and the second frame 190 to move relative to the fixed part 160 in the second dimension D2, 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] The preset position of the movable part ( Figure 11 the position shown) is different from the first calibration position ( Figure 12 the position shown). The preset position of the movable part is different from the second calibration position ( Figure 13 the position shown). 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] Next, please refer to Figure 14 . Figure 14 FIG. is a block diagram of the control unit 200, the first database 210, the second database 220, and the third database 230 of the 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 position of the movable part 150 at the preset position ( Figure 11 the position shown), and then rotate the movable part 110 to obtain a first set of data, which is recorded in the third database 230. Therefore, the third database 230 includes the relationships between multiple positions (for example, Figure 8 the first limit position shown, Figure 9 the second limit position shown, Figure 7 the preset position of the movable part shown, etc.) within the movement range of the movable part 110 and the first sensing signal S1 when the movable part 150 is located at the preset position of the movable part.

[0142] When performing the second stage of calibration of the optical element driving mechanism 1, change the position of the movable part 150 and fix it, and then rotate the movable part 110 again to obtain a second set of data, which is recorded in the third database 230. Therefore, the third database 230 includes when the movable part 150 is located at the first calibration position ( Figure 12When the movable part 110 is at multiple positions within the movement range of the movable part (for example, Figure 8 the first extreme position shown in Figure 9 the second extreme position shown in Figure 7 the preset position of the movable part shown, etc.), the relationship with the first sensing signal S1.

[0143] When performing the third stage of calibration of the optical element driving mechanism 1, the position of 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 when the movable part 150 is at the second calibration position ( Figure 13 the position shown), the movable part 110 is at multiple positions within the movement range of the movable part (for example, Figure 8 the first extreme position shown in Figure 9 the second extreme position shown in Figure 7 the preset position of the movable part shown, etc.), and the relationship with the first sensing signal S1.

[0144] Output a control signal to the control unit 200 according to the first sensing signal S1, the second sensing signal S2, 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 embodiments of the present disclosure can enable the movable part to 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 light input amount. The driving unit drives the movable part to change the position of the movable part, thereby adjusting the lens focal length.

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

[0147] Although the embodiments of the present disclosure and their advantages have been disclosed above, it should be understood that those skilled in the art can make changes, substitutions, and modifications without departing from the spirit and scope of the present disclosure. In addition, the protection scope of the present disclosure is not limited to the processes, machines, manufactures, compositions of matter, devices, methods, and steps in the specific embodiments described in the specification. Any person skilled in the art can understand the processes, machines, manufactures, compositions of matter, devices, methods, and steps developed currently or in the future from the disclosure content of the present disclosure. As long as they can perform 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 protection scope of the present disclosure includes the above-mentioned processes, machines, manufactures, compositions of matter, devices, methods, and steps. In addition, each claim constitutes an individual embodiment, and the protection scope of the present disclosure also includes the combination of each claim and embodiment.

Claims

1. An optical element driving mechanism, characterized in that: include: 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, comprising: A first coil having a first section; a magnetic element having a magnetic element surface facing the first section; and a second coil corresponding to the magnetic element; and A first sensing component is used to sense the movement of the movable part.

2. The optical element driving mechanism according to claim 1, wherein: The device further comprises 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; and 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 according to claim 2, wherein: The first coil also has a second section and a third section; The second coil has 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 according to 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 according to claim 4, characterized in that: The movable part can move relative to the first frame within a movable part 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, characterized in that: 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, characterized in that: Also includes: 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 according to claim 7, wherein: The invention also includes a control unit, which outputs a control signal to drive the movable part according to the first sensing signal, the second sensing signal, the first database, the second database and the third database.

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