Optical element driving mechanism

Abstract

The utility model provides an optical element driving mechanism. The optical element driving mechanism comprises a movable part, a fixed part and a driving assembly. The movable part is used for connecting the optical element and can move relative to the fixed part, and the driving assembly is used for driving the movable part to move relative to the fixed part.

Description

Technical Field

[0001] The present disclosure relates to an optical element driving mechanism. Background Art

[0002] With the development of technology, many electronic devices (such as smart phones or digital cameras) now have the function of taking photos or recording videos. These electronic devices are becoming more and more common and are developing in the direction of convenient and lightweight designs to provide users with more choices.

[0003] Electronic devices with camera or video recording capabilities typically incorporate an optical element drive mechanism to drive an optical element (such as a lens) along the optical axis, thereby achieving autofocus (AF) or optical image stabilization (OIS). Light passes through the optical element to form an image on a photosensitive element. However, with the current trend toward smaller and more durable mobile devices, effectively reducing the size of optical element drive mechanisms and improving their durability have become crucial issues. Utility Model Content

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

[0005] The present disclosure provides an optical element driving mechanism, comprising a movable portion, a fixed portion, and a driving assembly. The movable portion is used to connect the optical element and can move relative to the fixed portion, and the driving assembly is used to drive the movable portion to move relative to the fixed portion.

[0006] In some embodiments, the optical element driving mechanism further includes a first magnetic conductive element, a second magnetic conductive element, a third magnetic conductive element, a third magnetic element, a fourth magnetic element, and a guide assembly. The first magnetic conductive element is arranged on the fixed portion. The second magnetic conductive element is arranged on the fixed portion. The third magnetic conductive element is arranged on the fixed portion. The third magnetic element is arranged on the movable portion. The fourth magnetic element is arranged on the movable portion. The guide assembly is arranged on the fixed portion, and includes a first guide element and a second guide element, which are arranged on the fixed portion. The driving assembly includes a first magnetic element, a second magnetic element, a first driving coil, and a second driving coil. The first magnetic element is arranged on the movable portion. The second magnetic element is arranged on the movable portion. The first driving coil is arranged on the fixed portion, corresponding to the first magnetic element. The second driving coil is arranged on the fixed portion, corresponding to the second magnetic element.

[0007] In some embodiments, the first magnetic element corresponds to the first guiding element. The second magnetic element corresponds to the second guiding element. The first magnetic element corresponds to the first magnetic conductive element. The third magnetic element corresponds to the second magnetic conductive element. The fourth magnetic element corresponds to the third magnetic conductive element. The first magnetic element and the first guiding element generate a first force on the movable portion. The second magnetic element and the second guiding element generate a second force on the movable portion. The first magnetic element and the first magnetic conductive element generate a third force on the movable portion. The third magnetic element and the second magnetic conductive element generate a fourth force on the movable portion. The fourth magnetic element and the third magnetic conductive element generate a fifth force on the movable portion.

[0008] In some embodiments, the first force, the second force, the third force, the fourth force, and the fifth force collectively generate a net force on the movable portion. The net force is greater than zero in a first direction. The net force is greater than zero in a second direction. The first direction is perpendicular to the second direction. The direction of the first force is neither parallel to nor perpendicular to the first direction. The direction of the first force is neither parallel to nor perpendicular to the second direction. The direction of the second force is neither parallel to nor perpendicular to the first direction. The direction of the second force is neither parallel to nor perpendicular to the second direction. The direction of the third force is parallel to the first direction. The direction of the fourth force is parallel to the second direction. The direction of the fifth force is parallel to the first direction.

[0009] In some embodiments, in a first direction, a first distance exists between the first magnetic element and the first magnetic element. In a second direction, a second distance exists between the second magnetic element and the third magnetic element. In the first direction, a third distance exists between the third magnetic element and the fourth magnetic element. The first distance is different from the second distance. The first distance is different from the third distance. The second distance is different from the third distance. In the second direction, the first magnetic element has a first length. In the first direction, the second magnetic element has a second length. In the first direction, the third magnetic element has a third length. In the second direction, the fourth magnetic element has a fourth length. The first length is different from the third length. The first length is different from the fourth length. The second length is different from the third length. The second length is different from the fourth length.

[0010] In some embodiments, the first distance is greater than the third distance. The first length is greater than the third length. The first length is greater than the fourth length. The second length is greater than the third length. The second length is greater than the fourth length. The fixing portion includes a base. The first magnetic conductive element is disposed on the base. The second magnetic conductive element is disposed on the base. The third magnetic conductive element is disposed on the base. The base includes a base portion located between the second magnetic conductive element and the third magnetic element. The base is not located between the third magnetic conductive element and the fourth magnetic element.

[0011] In some embodiments, the fixed portion includes a first side, a second side, a third side, and a fourth side. The first side is adjacent to the second side. The first side is adjacent to the third side. The second side is adjacent to the fourth side. The third side is adjacent to the fourth side. The first drive coil is disposed on the first side. The second drive coil is disposed on the second side. The third and fourth sides do not have drive coils.

[0012] In some embodiments, the base includes a first groove and a second groove. A first guide element is disposed in the first groove. A second guide element is disposed in the second groove. The first groove has a first contact surface and a second contact surface. The second groove has a third contact surface, a first limiting surface, and a second limiting surface. The first guide element directly contacts the first and second contact surfaces. The second guide element directly contacts the third contact surface. The third contact surface is adjacent to the first and second limiting surfaces. The third contact surface is located between the first and second limiting surfaces. The second guide element does not contact the first and second limiting surfaces.

[0013] In some embodiments, the movable portion includes an opening. The main axis passes through the center of the opening. The direction in which the main axis extends is perpendicular to the first and second directions. As viewed along the main axis, the first line segment passes through the first and second guide elements. As viewed along the main axis, the second line segment passes through the center and is perpendicular to the first line segment. As viewed along the main axis, the third line segment extends in the first direction and passes through the center of the first magnetic element. As viewed along the main axis, the fourth line segment extends in the second direction and passes through the center of the third magnetic element. As viewed along the main axis, the fifth line segment extends in the first direction and passes through the center of the fourth magnetic element. The direction of the resultant force is a third direction. The third direction is not perpendicular to the direction in which the first line segment extends. The third direction is not parallel to the direction in which the second line segment extends. The first line segment does not pass through the center. The third line segment and the fifth line segment do not overlap. The third line segment does not pass through the center. The fourth line segment does not pass through the center. The fifth line segment does not pass through the center. As viewed along the main axis, the center and the fifth line segment are located on either side of the third line segment. The normal force between the first guide element and the first contact surface is different from the normal force between the first guide element and the second contact surface.

[0014] In some embodiments, the angle between the third direction and the first direction is smaller than the angle between the third direction and the second direction. The first guiding element and the third magnetic element are located on the same side of the second line segment. The second guiding element and the fourth magnetic element are located on the same side of the second line segment. The positive force between the first guiding element and the first contact surface is greater than the positive force between the first guiding element and the second contact surface. The drive assembly also includes a position sensing element. When viewed along the main axis, the position sensing element and the first guiding element are arranged on the same side of the second line segment. The optical element driving mechanism also includes a circuit element and a temperature sensing element. The position sensing element and the temperature sensing element are arranged on the circuit element. The temperature sensing element is arranged at a corner of the optical element driving mechanism.

[0015] The beneficial effects of the present disclosure lie in that the specific relative positions and size relationships of the various components disclosed herein not only enable the drive mechanism to be thinner in specific directions and more compact overall, but also further enhance the optical quality of the system (e.g., image quality or depth sensing accuracy) by combining different optical modules. Furthermore, the optical modules are utilized to achieve a multi-level anti-shake system, significantly enhancing the stabilization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following will be described in detail with reference to the accompanying drawings, embodiments of the present disclosure. It should be noted that, in accordance with standard industry practice, various features are not shown to scale and are for illustrative purposes only. In fact, the dimensions of the elements may be arbitrarily enlarged or reduced to clearly illustrate the features of the present disclosure.

[0017] Figure 1 It is a schematic diagram of the optical element driving mechanism.

[0018] Figure 2 This is an exploded diagram of the optical element drive mechanism.

[0019] Figure 3 It is a top view of the optical element drive mechanism.

[0020] Figure 4 It is along Figure 3 The line segment AA shows the cross-sectional view.

[0021] Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 It is a top view of some components of the optical element drive mechanism.

[0022] The reference numerals are as follows:

[0023] 1000: Optical element drive mechanism

[0024] 1100:Fixed part

[0025] 1110: Shell

[0026] 1120: Base

[0027] 1131: first side

[0028] 1132: Second side

[0029] 1133: Third side

[0030] 1134: Fourth side

[0031] 1200: Activities Department

[0032] 1201: Opening

[0033] 1202: Center

[0034] 1210: first groove

[0035] 1211: first contact surface

[0036] 1212: Second contact surface

[0037] 1220: Second groove

[0038] 1221: Third contact surface

[0039] 1222: First limit surface

[0040] 1223: Second limit surface

[0041] 1300: Drive assembly

[0042] 1311: First magnetic element

[0043] 1312: Second magnetic element

[0044] 1321: First magnetic element

[0045] 1322: Second drive coil

[0046] 1400: Boot component

[0047] 1410: First guiding element

[0048] 1420: Second guiding element

[0049] 1500: Magnetic components

[0050] 1510: First magnetic conductive element

[0051] 1520: Second magnetic conductive element

[0052] 1530: The third magnetic conductive element

[0053] 1600: Circuit components

[0054] 1610: Third magnetic element

[0055] 1620: Fourth magnetic element

[0056] 1700: Temperature sensing element

[0057] 1710: Position sensing element

[0058] 1911: First Distance

[0059] 1912: The Second Distance

[0060] 1913: The Third Distance

[0061] 1914: First Length

[0062] 1915: Second Length

[0063] 1916: The third length

[0064] 1917: Fourth Length

[0065] 1920: Joining forces

[0066] 1921: The First Force

[0067] 1922: The Second Force

[0068] 1923: The Third Force

[0069] 1924: The Fourth Force

[0070] 1925: The Fifth Force

[0071] 1931: First Line Segment

[0072] 1932: Second Segment

[0073] 1933: The Third Segment

[0074] 1934: The Fourth Segment

[0075] 1935: The Fifth Segment

[0076] 1941: First Direction

[0077] 1942: Second Direction

[0078] 1943: Third Direction DETAILED DESCRIPTION

[0079] The following discloses many different implementation methods or examples to implement the different features of the subject matter provided. The following describes specific embodiments of the components and their arrangements to illustrate the present disclosure. Of course, these embodiments are only for illustration and should not be used to limit the scope of the present disclosure. For example, when the specification mentions that a first feature component is formed on a second feature component, it may include an embodiment in which the first feature component and the second feature component are in direct contact. It may also include an embodiment in which there are other features between the first feature component and the second feature component. In other words, the first feature component and the second feature component are not in direct contact.

[0080] In addition, repeated numbers or labels may be used in different embodiments. These repetitions are only for the purpose of simply and clearly describing the present disclosure and do not represent a specific relationship between the different embodiments and / or structures discussed. In addition, in the present disclosure, forming, connecting and / or coupling to another feature component on top of another feature component may include embodiments in which the feature components are formed to be in direct contact, and may also include embodiments in which additional feature components can be formed to be inserted into the above-mentioned feature components, so that the above-mentioned feature components may not be in direct contact. In addition, spatially related words such as "vertical", "above", "up", "below", "bottom" and similar words (such as "downwardly", "upwardly", etc.) may be used. These spatially related words are for the convenience of describing the relationship between one (some) element or feature and another (some) element or feature in the figure. These spatially related words are intended to cover different directions of the device including the feature.

[0081] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meanings as commonly understood by one of ordinary skill 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 that is consistent with the background or context of the relevant technology and this disclosure and should not be interpreted in an idealized or overly formal manner unless otherwise defined herein.

[0082] Furthermore, the use of ordinal numbers such as "first" and "second" in the specification and claims to modify claim elements does not in itself imply or represent that the claimed element has any previous ordinal number, nor does it represent the order of one claimed element and another claimed element, or the order in the manufacturing method. The use of multiple such ordinals is only used to clearly distinguish a claimed element with a certain name from another claimed element with the same name.

[0083] Furthermore, in some embodiments of the present disclosure, terms such as "connected" and "interconnected," unless otherwise specified, may refer to two structures being in direct contact, or to two structures not being in direct contact, with another structure positioned between them. Furthermore, such terms may include situations where both structures are movable or both structures are fixed.

[0084] The present disclosure provides an optical element driving mechanism for driving an optical element to move. For example, Figure 1 is a schematic diagram of the optical element driving mechanism 1000, Figure 2 is an exploded view of the optical element driving mechanism 1000. Figure 3 is a top view of the optical element driving mechanism 1000, Figure 4 It is along Figure 3 The cross-sectional view is shown by line segment AA. Figures 1 to 4 As shown, the optical element driving mechanism 1000 may include a fixed portion 1100 , a movable portion 1200 , a driving assembly 1300 , a guiding assembly 1400 , a magnetic conductive assembly 1500 , and a circuit element 1600 arranged along a main axis 1900 .

[0085] In some embodiments, the fixed portion 1100 may include a housing 1110 and a base 1120, which may be combined to form a housing for the optical element driving mechanism 1000, within which other components may be housed and protected. The movable portion 1200 may move relative to the fixed portion 1100, and an optical element (not shown) may be disposed within the movable portion 1200 to allow the optical element driving mechanism 1000 to drive the optical element to move along with the movable portion 1200, thereby achieving functions such as auto focus (AF).

[0086] In some embodiments, the optical element may be, for example, a lens, a mirror, a prism, a reflective polished surface, an optical coating, a beamsplitter, an aperture, a liquid lens, an image sensor, a camera module, a ranging module, etc. It should be noted that the definition of optical element herein is not limited to elements related to visible light, and elements related to invisible light (e.g., infrared light, ultraviolet light) may also be included in the present invention.

[0087] In some embodiments, the driving assembly 1300 may include a first magnetic element 1311, a second magnetic element 1312, a first driving coil 1321, and a second driving coil 1322 to drive the movable portion 1200 to move relative to the fixed portion 1100. In some embodiments, the first magnetic element 1311 and the second magnetic element 1312 may include magnets. For example, the first magnetic element 1311 and the second magnetic element 1312 may be disposed on the movable portion 1200, while the first driving coil 1321 and the second driving coil 1322 may be disposed on the fixed portion 1100. The first magnetic element 1311 and the second magnetic element 1312 may generate an electromagnetic driving force with the first driving coil 1321 and the second driving coil 1322, respectively, to drive the movable portion 1200 to move relative to the fixed portion 1100.

[0088] In some embodiments, the positions of the first magnetic element 1311 and the second magnetic element 1312 and the positions of the first driving coil 1321 and the second driving coil 1322 can also be interchanged. For example, the first magnetic element 1311 and the second magnetic element 1312 can be set on the fixed part 1100, and the first driving coil 1321 and the second driving coil 1322 can be set on the movable part 1200, depending on design requirements.

[0089] In some embodiments, the guide assembly 1400 may include a first guide element 1410 and a second guide element 1420, each having a cylindrical shape and extending in the direction in which the main shaft 1900 extends. The first guide element 1410 and the second guide element 1420 may be fixed to the fixed portion 1100 (e.g., the base 1120), and the movable portion 1200 may contact the first guide element 1410 and the second guide element 1420 through frictional contact, thereby defining the direction of movement of the movable portion 1200 relative to the fixed portion 1100 via the first guide element 1410 and the second guide element 1420.

[0090] For example, when the driving assembly 1300 is used to drive the movable portion 1200, the electromagnetic driving force provided by the driving assembly 1300 can be greater than the maximum static friction between the movable portion 1200 and the guide assembly 1400, thereby allowing the movable portion 1200 to move relative to the fixed portion 1100 along the main axis 1900. When the driving assembly 1300 is not powered, the friction between the movable portion 1200 and the guide assembly 1400 can fix the movable portion 1200 in a specific position, thereby eliminating the need to continuously supply power to the driving assembly 1300 to fix the movable portion 1200.

[0091] In some embodiments, the magnetic conductive assembly 1500 may include a first magnetic conductive element 1510, a second magnetic conductive element 1520, and a third magnetic conductive element 1530, which are disposed on the fixed portion 1100 (e.g., the base 1120) to define the direction of the magnetic field in the optical element driving mechanism 1000. The first magnetic conductive element 1510, the second magnetic conductive element 1520, and the third magnetic conductive element 1530 may be made of, for example, a magnetically conductive metal.

[0092] In some embodiments, the circuit element 1600 is, for example, a flexible printed circuit board (FPC), which can be fixed to the base 1120 by adhesive bonding. In this embodiment, the circuit element 1600 is electrically connected to other electronic components disposed inside or outside the optical element driving mechanism 1000. For example, the circuit element 1600 can transmit an electrical signal to the driving assembly 1300, thereby controlling the movement of the movable portion 1200 and achieving an autofocus (AF) function.

[0093] Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 FIG1 is a top view of some components of the optical element driving mechanism 1000, wherein some components are omitted to better illustrate the details of other components. Figures 5 to 8 As shown, the optical element driving mechanism 1000 may further include a third magnetic element 1610, a fourth magnetic element 1620, a temperature sensing element 1700, and a position sensing element 1710. The third magnetic element 1610 and the fourth magnetic element 1620 may be magnets, for example, and may be disposed on the movable portion 1200, while the temperature sensing element 1700 and the position sensing element 1710 may be disposed on the circuit element 1600.

[0094] In some embodiments, as Figure 6 As shown, the movable portion 1200 may have a first groove 1210 and a second groove 1220, and the first guide element 1410 and the second guide element 1420 may be disposed in the first groove 1210 and the second groove 1220, respectively. In some embodiments, the first groove 1210 and the second groove 1220 may have different structures. For example, the first groove 1210 may have a first contact surface 1211 and a second contact surface 1212, while the second groove 1220 may have a third contact surface 1221, a first limiting surface 1222, and a second limiting surface 1223. The third contact surface 1221 may be located between the first limiting surface 1222 and the second limiting surface 1223 and adjacent to the first limiting surface 1222 and the second limiting surface 1223.

[0095] During normal use, the first contact surface 1211 and the second contact surface 1212 may contact the first guiding element 1410, while the third contact surface 1221 may contact the second guiding element 1420. The first limiting surface 1222 and the second limiting surface 1223 do not contact the second guiding element 1420. Therefore, even if tolerances occur during production of the optical element driving mechanism 1000, the first guiding element 1410 and the second guiding element 1420 can still be disposed in the first groove 1210 and the second groove 1220, respectively.

[0096] However, since the contact area between the first guide element 1410 and the movable part 1200 is larger than the contact area between the second guide element 1420 and the movable part 1200 (the first guide element 1410 contacts the first contact surface 1211 and the second contact surface 1212 at the same time, while the second guide element 1420 only contacts the third contact surface 1221), if the positive force between the first guide element 1410 and the movable part 1200 is equal to the positive force between the second guide element 1420 and the movable part 1200, the friction force between the first guide element 1410 and the movable part 1200 will be greater than the friction force between the second guide element 1420 and the movable part 1200, causing the movable part 1200 to be subjected to uneven force when moving along the main axis 1900, so that the movable part 1200 may be skewed during movement instead of moving along the main axis 1900. Therefore, the positive force between the first guide element 1410 and the movable part 1200 needs to be designed to be smaller than the positive force between the second guide element 1420 and the movable part 1200, so that the movable part 1200 is subjected to uniform friction force at the first guide element 1410 and the second guide element 1420 when moving along the main axis 1900.

[0097] like Figure 7 、 Figure 8 As shown, the first magnetic element 1311 may correspond to the first guiding element 1410 and the first magnetically conductive element 1510, the second magnetic element 1312 may correspond to the second guiding element 1420, the third magnetic element 1610 may correspond to the second magnetically conductive element 1520, and the fourth magnetic element 1620 may correspond to the third magnetically conductive element 1530. "Corresponding" here may represent the generation of a magnetic attraction between the two elements. Thus, a first force 1921 may be generated between the first magnetic element 1311 and the first guiding element 1410, a second force 1922 may be generated between the second magnetic element 1312 and the second guiding element 1420, a third force 1923 may be generated between the first magnetic element 1321 and the first magnetically conductive element 1510, a fourth force 1924 may be generated between the third magnetic element 1610 and the second magnetically conductive element 1520, and a fifth force 1925 may be generated between the fourth magnetic element 1620 and the third magnetically conductive element 1530.

[0098] In some embodiments, since the first magnetic element 1311, the second magnetic element 1312, the third magnetic element 1610, and the fourth magnetic element 1620 are all arranged on the movable part 1200, the first force 1921, the second force 1922, the third force 1923, the fourth force 1924, and the fifth force 1925 are all forces acting on the movable part 1200.

[0099] In some embodiments, first force 1921 and second force 1922 have positive components in both first direction 1941 and second direction 1942, wherein first direction 1941 is perpendicular to second direction 1942, and both first direction 1941 and second direction 1942 are perpendicular to the direction in which principal axis 1900 extends. In other words, the directions of first force 1921 and second force 1922 are neither perpendicular nor parallel to first direction 1941 or second direction 1942, and may, for example, be substantially parallel to line segment 1932. In some embodiments, the direction of third force 1923 is opposite to first direction 1941, the direction of fourth force 1924 is the same as second direction 1942, and the direction of fifth force 1925 is the same as first direction 1941.

[0100] In some embodiments, first line segment 1931 can be defined as a line segment passing through first guide element 1410 and second guide element 1420 when viewed along main axis 1900, while second line segment 1932 can be defined as a line segment perpendicular to first line segment 1931 and passing through center 1202 of opening 1201 of movable portion 1200. It should be noted that first line segment 1931 does not pass through center 1202. Furthermore, main axis 1900 does pass through center 1202. In some embodiments, center 1202 can be the center of mass of movable portion 1200. In some embodiments, center 1202 can be the midpoint between first guide element 1410 and second guide element 1420. In some embodiments, first guide element 1410 and third magnetic element 1610 can be located on the same side of second line segment 1932, while second guide element 1420 and fourth magnetic element 1620 can be located on the other side of second line segment 1932.

[0101] In some embodiments, third line segment 1933 can be defined as a line segment extending in first direction 1941 and passing through the center of first magnetic element 1311. Fourth line segment 1934 can be defined as a line segment extending in second direction 1942 and passing through the center of third magnetic element 1610. Fifth line segment 1935 can be defined as a line segment extending in first direction 1941 and passing through the center of fourth magnetic element 1620. In some embodiments, third line segment 1933 and fifth line segment 1935 can be parallel to each other and do not overlap. In some embodiments, third line segment 1933, fourth line segment 1934, and fifth line segment 1935 do not pass through center 1202. When viewed along major axis 1900, center 1202 and fifth line segment 1935 are located on either side of third line segment 1933.

[0102] As previously mentioned, in order to subject second guiding element 1420 to a greater normal force relative to first guiding element 1410, it is desirable to bias resultant force 1920, formed by first acting force 1921, second acting force 1922, third acting force 1923, fourth acting force 1924, and fifth acting force 1925, more toward second guiding element 1420. Furthermore, the direction of resultant force 1920 can be defined as a third direction 1943, where third direction 1943 is neither perpendicular nor parallel to the directions in which first line segment 1931 and second line segment 1932 extend. In other words, the direction of resultant force 1920 (third direction 1943) forms an angle greater than zero with second line segment 1932, and the angle between third direction 1943 and first direction 1941 is smaller than the angle between third direction 1943 and second direction 1942. In this way, the second guiding element 1420 can be subjected to a greater positive force relative to the first guiding element 1410, so that when the movable part 1200 moves relative to the first guiding element 1410 and the second guiding element 1420, the total friction force at the first guiding element 1410 and the second guiding element 1420 is consistent, thereby preventing the movable part 1200 from flipping during movement.

[0103] It should be noted that because the direction of resultant force 1920 (third direction 1943) is neither perpendicular nor parallel to second line segment 1932, and the normal vector of first contact surface 1211 is parallel to first direction 1941, and the normal vector of second contact surface 1212 is parallel to second direction 1942, the normal forces acting on first contact surface 1211 and second contact surface 1212 are different. For example, the normal force between first guide element 1410 and first contact surface 1211 is greater than the normal force between first guide element 1410 and second contact surface 1212.

[0104] In some embodiments, to ensure that the direction of resultant force 1920 satisfies the aforementioned description, the directions of first force 1921 and second force 1922 can be designed to be substantially parallel to second line segment 1932, the magnitude of fifth force 1925 can be designed to be greater than the magnitude of third force 1923, and the magnitude of fourth force 1924 can be designed to be less than the resultant force of third force 1923 and fifth force 1925 in first direction 1941. Thus, resultant force 1920 can be biased more toward one side of second guide element 1420, thereby achieving the aforementioned purpose.

[0105] For example, in a first direction 1941, a first distance 1911 may be defined between the first magnetic element 1311 and the first magnetically conductive element 1510. In a second direction 1942, a second distance 1912 may be defined between the third magnetic element 1610 and the second magnetically conductive element 1520. In the first direction 1941, a third distance 1913 may be defined between the fourth magnetic element 1620 and the third magnetically conductive element 1530. The first distance 1911 is smaller than the third distance 1913, and the second distance 1912 is smaller than the third distance 1913. This increases the fifth acting force 1925 between the fourth magnetic element 1620 and the third magnetically conductive element 1530, thereby achieving the aforementioned objective.

[0106] In some embodiments, a first driving coil 1321 is arranged between the first magnetic element 1311 and the first magnetic conductive element 1510, a base portion 1121 of the base 1120 is arranged between the third magnetic element 1610 and the second magnetic conductive element 1520, and the base 1120 is not located between the fourth magnetic element 1620 and the third magnetic conductive element 1530, thereby increasing the distance between the first magnetic element 1311 and the first magnetic conductive element 1510 and between the third magnetic element 1610 and the second magnetic conductive element 1520 to avoid the third force 1923 or the fourth force 1924 being too large.

[0107] In some embodiments, because the first magnetic element 1311 and the second magnetic element 1312 need to interact with the first driving coil 1321 and the second driving coil 1322, respectively, to push the movable portion 1200, while the third magnetic element 1610 and the fourth magnetic element 1620 do not need to generate a force with the coils, the dimensions of the first magnetic element 1311 and the second magnetic element 1312 can be designed to be larger than the dimensions of the third magnetic element 1610 and the fourth magnetic element 1620. For example, in the second direction 1942, the first magnetic element 1311 has a first length 1914, in the first direction 1941, the second magnetic element 1312 has a second length 1915, in the first direction 1941, the third magnetic element 1610 has a third length 1916, and in the second direction 1942, the fourth magnetic element 1620 has a fourth length 1917. The first length 1914 and the second length 1915 can be larger than the third length 1916 and the fourth length 1917.

[0108] In some embodiments, as Figure 5As shown, the base 1120 may have a first side 1131, a second side 1132, a third side 1133, and a fourth side 1134, wherein the first side 1131 is adjacent to the second side 1132 and the third side 1133, and the fourth side 1134 is also adjacent to the second side 1132 and the third side 1133. The first side 1131, the second side 1132, the third side 1133, and the fourth side 1134 may correspond to the first magnetic element 1311, the second magnetic element 1312, the third magnetic element 1610, and the fourth magnetic element 1620, respectively. In some embodiments, the first drive coil 1321 may be disposed on the first side 1131, the second drive coil 1322 may be disposed on the second side 1132, and no drive coils are disposed on the third side 1133 and the fourth side 1134.

[0109] In some embodiments, the temperature sensing element 1700 can be disposed at a corner of the optical element driving mechanism 1000 to sense the temperature of the optical element driving mechanism 1000. The position sensing element 1710 can be disposed on the first side 1131. When viewed along the main axis 1900, the position sensing element 1710 and the first guide element 1410 can be disposed on the same side of the second line segment 1932. Because the movable portion 1200 where the position sensing element 1710 is disposed is subjected to a greater frictional force and is therefore more stable, more accurate measurement results can be obtained when the position sensing element 1710 is used to measure the magnetic field of the first magnetic element 1311.

[0110] In some embodiments, the position sensing element 1710 may include a Hall effect sensor, a magnetoresistance effect sensor (MR sensor), a giant magnetoresistance effect sensor (GMR sensor), a tunneling magnetoresistance effect sensor (TMR sensor), or a fluxgate sensor.

[0111] In some embodiments, other elements can be used to replace the third magnetic element 1610, the fourth magnetic element 1620, the second magnetic conductive element 1520, and the third magnetic conductive element 1530 to provide the fourth force 1924 and the fifth force 1925 to the movable part 1200. For example, reeds, piezoelectric elements, shape memory alloys and other elements can be used, or they can be used together with the third magnetic element 1610, the fourth magnetic element 1620, the second magnetic conductive element 1520, and the third magnetic conductive element 1530, depending on design requirements.

[0112] In summary, the disclosed embodiments provide an optical element drive mechanism comprising a movable portion, a fixed portion, and a drive assembly. The movable portion is used to connect to the optical element and is movable relative to the fixed portion, while the drive assembly is used to drive the movable portion to move relative to the fixed portion. This ensures a more stable direction of the movable portion relative to the fixed portion, resulting in better imaging results.

[0113] The specific relative positions and size relationships of the various components disclosed in this disclosure not only enable the drive mechanism to be thinner in specific directions and more compact overall, but also further enhance the optical quality of the system (e.g., image quality or depth sensing accuracy) by combining different optical modules. Furthermore, the optical modules are utilized to achieve a multi-level anti-shake system, significantly improving the image stabilization effect.

[0114] Although the embodiments of the present disclosure and their advantages have been disclosed as 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 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 person skilled in the art can understand from the disclosure of the present disclosure that the processes, machines, manufactures, material compositions, devices, methods and steps currently or in the future are developed. 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, characterized in that: include: a movable portion for connecting to an optical element, the movable portion comprising an opening, a main axis passing through a center of the opening; a fixed portion, the movable portion being movable relative to the fixed portion, comprising a base, the base comprising a first groove and a second groove; a driving assembly for driving the movable portion to move relative to the fixed portion, the driving assembly comprising: a first magnetic element disposed on the movable portion; and a second magnetic element disposed on the movable portion; A guide assembly, disposed on the fixing portion, comprising: a first guiding element disposed in the first groove; and a second guide element disposed in the second groove, wherein a first line segment passes through the first guide element and the second guide element when viewed along the main axis, and the first line segment does not pass through the center; a third magnetic element disposed on the movable portion; and a fourth magnetic element disposed on the movable portion; In a second direction, the first magnetic element has a first length; In a first direction, the second magnetic element has a second length; In the first direction, the third magnetic element has a third length; In the second direction, the fourth magnetic element has a fourth length; The first direction is perpendicular to the second direction; The first length is different from the third length; The first length is different from the fourth length; The second length is different from the third length; The second length is different from the fourth length.

2. The optical element driving mechanism according to claim 1, wherein: Also includes: a first magnetic conductive element, disposed on the fixing portion; a second magnetic conductive element, disposed on the fixing portion; a third magnetic conductive element, disposed on the fixing portion; The drive assembly includes: a first driving coil, disposed on the fixed portion and corresponding to the first magnetic element; as well as A second driving coil is disposed on the fixing portion and corresponds to the second magnetic element.

3. The optical element driving mechanism according to claim 2, wherein: The first magnetic element corresponds to the first guiding element; The second magnetic element corresponds to the second guiding element; The first magnetic element corresponds to the first magnetic conductive element; The third magnetic element corresponds to the second magnetic conductive element; The fourth magnetic element corresponds to the third magnetic conductive element; The first magnetic element and the first guiding element generate a first force on the movable portion; The second magnetic element and the second guiding element generate a second force on the movable portion; The first magnetic element and the first magnetic conductive element generate a third force on the movable portion; The third magnetic element and the second magnetic conductive element generate a fourth force on the movable portion; The fourth magnetic element and the third magnetic conductive element generate a fifth force on the movable portion.

4. The optical element driving mechanism according to claim 3, wherein: The first acting force, the second acting force, the third acting force, the fourth acting force, and the fifth acting force jointly generate a resultant force on the movable portion; The resultant force is greater than zero in a first direction; The resultant force in a second direction is greater than zero; The direction of the first force is neither parallel nor perpendicular to the first direction; The direction of the first force is neither parallel nor perpendicular to the second direction; The direction of the second force is neither parallel nor perpendicular to the first direction; The direction of the second force is neither parallel nor perpendicular to the second direction; The direction of the third force is parallel to the first direction; The direction of the fourth force is parallel to the second direction; The direction of the fifth force is parallel to the first direction.

5. The optical element driving mechanism according to claim 4, wherein: In the first direction, there is a first distance between the first magnetic conductive element and the first magnetic element; In the second direction, there is a second distance between the second magnetic conductive element and the third magnetic element; In the first direction, there is a third distance between the third magnetic conductive element and the fourth magnetic element; The first distance is different from the second distance; The first distance is different from the third distance; The second distance is different from the third distance.

6. The optical element driving mechanism according to claim 5, wherein: The first distance is greater than the third distance; The first length is greater than the third length; The first length is greater than the fourth length; The second length is greater than the third length; The second length is greater than the fourth length; The first magnetic conductive element is disposed on the base; The second magnetic conductive element is disposed on the base; The third magnetic conductive element is disposed on the base; The base includes a base portion located between the second magnetic conductive element and the third magnetic element; The base is not located between the third magnetic conductive element and the fourth magnetic element.

7. The optical element driving mechanism according to claim 6, wherein: The fixing portion includes a first side, a second side, a third side, and a fourth side; The first side is adjacent to the second side; The first side is adjacent to the third side; The second side is adjacent to the fourth side; The third side is adjacent to the fourth side; The first driving coil is arranged on the first side; The second driving coil is arranged on the second side; The third side and the fourth side have no driving coils.

8. The optical element driving mechanism according to claim 7, wherein: The first groove has a first contact surface and a second contact surface; The second groove has a third contact surface, a first limiting surface, and a second limiting surface; The first guiding element directly contacts the first contact surface and the second contact surface; The second guide element directly contacts the third contact surface; The third contact surface is adjacent to the first limiting surface and the second limiting surface; The third contact surface is located between the first limiting surface and the second limiting surface; The second guiding element does not contact the first limiting surface or the second limiting surface.

9. The optical element driving mechanism according to claim 8, wherein: The direction in which the main axis extends is perpendicular to the first direction and the second direction; A second line segment passes through the center and is perpendicular to the first line segment when viewed along the main axis; A third line segment extends in the first direction and passes through the center of the first magnetic element when viewed along the main axis; A fourth line segment extends in the second direction and passes through the center of the third magnetic element when viewed along the main axis; Viewed along the principal axis, a fifth line segment extends in the first direction and passes through the center of the fourth magnetic element; The direction of the resultant force is a third direction; The third direction is not perpendicular to the direction in which the first line segment extends; The third direction is not parallel to the direction in which the second line segment extends; The third line segment does not overlap with the fifth line segment; The third line segment does not pass through the center; The fourth line segment does not pass through the center; The fifth line segment does not pass through the center; When viewed along the principal axis, the center and the fifth line segment are located on both sides of the third line segment; A normal force between the first guide element and the first contact surface is different from a normal force between the first guide element and the second contact surface.

10. The optical element driving mechanism according to claim 9, wherein: An included angle between the third direction and the first direction is smaller than an included angle between the third direction and the second direction; The first guiding element and the third magnetic element are located on the same side of the second line segment; The second guiding element and the fourth magnetic element are located on the same side of the second line segment; The normal force between the first guide element and the first contact surface is greater than the normal force between the first guide element and the second contact surface; The drive assembly also includes a position sensing element; When viewed along the main axis, the position sensing element and the first guiding element are arranged on the same side of the second line segment; The optical element driving mechanism also includes a circuit element and a temperature sensing element; The position sensing element and the temperature sensing element are disposed on the circuit element; The temperature sensing element is arranged at a corner of the optical element driving mechanism.

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