Optical assembly and method of assembling the same

Abstract

This application provides an optical component and its assembly method. By fixing a third lens portion with its optical axis as a reference, the positions of the first and second lens portions are simultaneously adjusted. Based on the sensitivity of the optical lenses, the first lens portion, with higher sensitivity, is first fixed to the housing of the driving device. Then, the position of the second optical lens portion, with lower sensitivity, is adjusted. Finally, after the second lens portion can clearly image the image, it is fixed to the focusing carrier of the driving device, thus forming the optical component described in this application. This assembly method simplifies the assembly process while ensuring the accuracy of the assembled optical component.

Description

Technical Field

[0001] This application relates to the field of camera module technology, and more particularly to an optical component and camera module with internal focusing capable of optical image stabilization. Background Technology

[0002] An optical lens is an essential component of a camera module, capable of converging incident light to form an image. In recent years, as users' demands for image quality in camera modules have increased, the pixel count of camera modules has also been continuously improving. Simultaneously, to enhance image quality, the size of the image sensor has also increased accordingly, thus placing increasingly higher demands on the design of the compatible optical lenses. Existing integrated optical lenses in camera modules consist of a lens barrel and multiple lens elements housed within it. Due to technological limitations in the design and assembly methods of integrated optical lenses, camera modules equipped with integrated optical lenses struggle to meet the miniaturization requirements of large-sensor camera modules. Furthermore, the overall lens height is relatively high, requiring additional clearance within the module for lens movement during autofocus.

[0003] How to achieve focusing and image stabilization of optical lenses that are compatible with large-size chips, while ensuring the miniaturization of their overall structure, remains a pressing technical problem that needs to be solved. Summary of the Invention

[0004] To address the aforementioned issues, this invention provides a lens drive structure suitable for focusing within a large-size chip, which, while achieving image stabilization, can solve some or most of the problems present in existing integrated lens solutions.

[0005] This invention provides an optical component for an internal focusing camera module suitable for large image sensors. In order to improve the imaging quality of the camera module, the size of the image sensor chip is increased accordingly, and the requirements for the driving force of image stabilization and focusing are also increased. How to improve the imaging quality of the camera module while ensuring the miniaturization of the overall structure is one of the urgent problems to be solved.

[0006] As the size of the image sensor increases, the size and weight of the corresponding optical lens also increase. In some cases, the excessive weight of the optical lens may result in insufficient driving force from the drive mechanism for focusing and image stabilization. Improving the structure of the drive mechanism itself to provide greater driving force would increase its overall size, contradicting the current trend towards miniaturization.

[0007] Based on the aforementioned technical challenges, by dividing the optical lens into multiple lens groups, the driving device can move some of these groups to achieve focusing and image stabilization during the large chip imaging process. This improves the imaging quality of the camera module while also miniaturizing the overall structure.

[0008] One object of the present invention is to provide an optical component and a camera module that divides the overall optical lens into multiple lens groups and drives some of the lens sections to move, thereby improving image quality while ensuring the miniaturization of the overall structure.

[0009] Another object of the present invention is to provide an optical component and a camera module, wherein a driving device is configured for at least one lens portion of a plurality of optical lenses.

[0010] Another objective of the present invention is to provide an optical component and a camera module, wherein the optical lens group mainly includes three lens sections, making the second lens section movable, thereby solving the problem of insufficient driving force.

[0011] Another object of the present invention is to provide an optical component and a camera module such that when the first lens part and the third lens part are fixedly installed, the second lens part is disposed between the first lens part and the third lens part and maintains a certain gap, so as to reserve the focusing distance of the second lens part.

[0012] Another object of the present invention is to provide an optical component and a camera module, wherein a first lens portion and a third lens portion are fixed to a fixed portion of a driving device, a second lens portion is fixed to a movable portion of the driving device, and the driving portion of the lens realizes image stabilization or focusing functions.

[0013] Another object of the present invention is to provide an optical component and a camera module, wherein the optical image stabilization unit of the driving device drives the second lens unit to perform optical image stabilization, thereby realizing optical image stabilization within the lens group.

[0014] Another object of the present invention is to provide an optical component and a camera module, wherein the focusing part of the driving device drives the second lens part to focus, thereby achieving focusing within the lens group.

[0015] Another objective of this invention is to provide an optical component and a camera module, wherein the focusing and image stabilization modules within the optical component share a common magnet pair, which can make full use of the internal space of the driving device and achieve miniaturization of the overall structure.

[0016] Another object of the present invention is to provide an optical component and a camera module, wherein the focusing and image stabilization modules within the optical component share a common magnet pair, thereby reducing structural components, making the structure compact, reducing the size of the optical component, and thus achieving miniaturization.

[0017] Another objective of this invention is to provide an optical component and a camera module, wherein the second lens portion moves within the housing, making full use of the internal space for focusing and image stabilization, thereby achieving a reasonable structural configuration and meeting the requirements of structural miniaturization.

[0018] Another object of the present invention is to provide an optical component and a camera module, wherein the housing provides a support surface for the first lens part and a housing space for the second lens part, and the structure is compact, thereby achieving a reduction in size in the Z direction.

[0019] Another objective of the present invention is to provide an optical component and a camera module, wherein the image stabilization component is disposed above the base, and the third lens is directly fixed to the base and mounted at the mounting position on the lower side of the base, thereby achieving a reduction in size in the Z direction.

[0020] Another object of the present invention is to provide an optical component and a camera module that fixes a third lens portion to a motor base, provides space for the movement of a second lens portion, and prevents collision between the second lens portion and the drive device base.

[0021] Another objective of the present invention is to provide an optical component and a camera module, wherein a third lens mounting position is provided on the lower surface of the motor base, providing sufficient mounting space for the third lens and ensuring the stability of the third lens connection.

[0022] Another object of the present invention is to provide an optical component and a camera module, wherein the base of the driving device has a circuit structure injection molded inside.

[0023] Another objective of this invention is to provide an optical component and a camera module, which uses a magnetic yoke embedded in a base by injection molding, and utilizes two adjacent and connected sides to set the magnetic yoke, thereby reducing the resistance to the return of the moving carrier.

[0024] Another object of the present invention is to provide an optical component and a camera module, which provides a miniaturized camera module by providing a photosensitive component structure based on a molded base, and molding the junction of the circuit board and the photosensitive chip.

[0025] Other advantages and features of the invention will be fully apparent from the following detailed description and may be achieved by combinations of the means and apparatus specifically pointed out in the appended claims.

[0026] According to one aspect of the present invention, the present invention provides a method for assembling an optical component, comprising:

[0027] (a) An optical lens is provided, the optical lens comprising a first lens portion, a second lens portion and a third lens portion arranged sequentially from the object side to the image side along the optical axis;

[0028] (b) The third lens portion is fixedly disposed with the fixing portion of the optical assembly;

[0029] (c) Pre-position the first lens section along the optical axis of the third lens section;

[0030] (d) Assemble and calibrate the first lens section, the second lens section and the third lens section to form an optical lens with clear imaging;

[0031] (e) Fix the first lens portion to the fixed portion, and fix the second lens portion to the movable portion of the optical assembly.

[0032] In step (d), assembling and calibrating the first lens unit, the second lens unit, and the third lens unit includes:

[0033] Using the third lens section as a reference, calibrate the gap of the second lens section in the Z direction;

[0034] Using the third lens section and the second lens section as a reference, the gap in the Z direction of the first lens section is corrected;

[0035] Using the third lens section as a reference, the position of the second lens section in the XY direction is corrected;

[0036] Using the third lens section and the second lens section as references, the position of the first lens section in the XY direction is corrected.

[0037] Step (e) includes:

[0038] Fix the first lens portion and the fixing portion;

[0039] The second lens unit can be adjusted in multiple degrees of freedom relative to the fixedly connected first and third lens units;

[0040] Once the optical lens formed by the second lens portion, the first lens portion, and the third lens portion can meet the imaging requirements, the second lens portion and the movable portion are fixed.

[0041] In step (b), the fixing part includes a base, the base includes a base body and a support part, and a ring structure extends downward from the peripheral area of ​​the base body to form the support part. The support part and the base body form a mounting position, and the third lens part is fixed in the mounting position.

[0042] The fixing part further includes a housing, which includes a main body and a supporting part. The main body is hollow and annular, with the upper end near the object extending inward to form the supporting part.

[0043] In step (c), the first lens portion is held above the second lens portion by the support portion that is pre-assembled on the housing.

[0044] The movable part includes an optical image stabilization unit, and the second lens part is pre-assembled into the movable part. The optical image stabilization unit drives the second lens part to move relative to the first lens part and the third lens part in a direction perpendicular to the optical axis.

[0045] The main body and the supporting part constitute a receiving space, and the second lens part is disposed in the receiving space and moves along a direction perpendicular to the optical axis within the receiving space.

[0046] The housing has a support portion with a clearance groove for clamping and adjusting the second lens portion.

[0047] The second lens portion includes a clamping portion that extends integrally outward along the side of the second lens portion and into the space of the clearance groove formed by the housing, so as to adjust the position of the second lens portion by clamping the clamping portion through the clearance groove.

[0048] The further objectives and advantages of this application will become fully apparent from the following description and accompanying drawings.

[0049] These and other objects, features and advantages of this application are fully apparent from the following detailed description, the accompanying drawings and the claims. Attached Figure Description

[0050] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0051] Figure 1 A schematic diagram of the overall structure of the optical assembly with a split optical lens in this application is shown.

[0052] Figure 2 A cross-sectional schematic diagram of the optical assembly with a split optical lens in this application is shown.

[0053] Figure 3 An exploded perspective view of the optical components described in this application is shown.

[0054] Figure 4An exploded view of the focusing unit and optical image stabilization unit on the drive device of this application is shown.

[0055] Figure 5 A schematic diagram of the combined focusing section and optical image stabilization section of the drive device in this application is shown.

[0056] Figure 6 A schematic diagram of the structure of the third lens mounted on the base in this application is shown.

[0057] Figure 7 An exploded view of the optical image stabilization unit and the base of the optical component in this application is shown.

[0058] Figure 8 A cross-sectional schematic diagram of the base structure of the drive device in this application is shown.

[0059] Figure 9 A schematic diagram of the camera module structure with optical components as described in this application is shown.

[0060] Figure 10 A cross-sectional view of the camera module with optical components provided in this application is shown.

[0061] Figure 11 An exploded view of the second lens section and the drive device in this application is shown.

[0062] Figure 12 This is a cross-sectional view showing the second lens section and the drive unit assembled in this application. Detailed Implementation

[0063] Hereinafter, exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments of the present invention. It should be understood that the present invention is not limited to the exemplary embodiments described herein.

[0064] In the description of this invention, it should be noted that directional terms such as "center," "lateral," "longitudinal," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this invention.

[0065] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0066] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0067] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection, a contact connection, or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0068] Exemplary optical components

[0069] like Figures 1 to 8 As shown, an optical component according to an embodiment of this application is illustrated, wherein the optical component includes an optical lens 20 and a driving device 30. The optical lens 20 is a split optical lens unit, including multiple lens units arranged along the optical axis. A portion of the optical lens 20 is disposed inside the driving device 30 and is held and driven by the driving device 30.

[0070] The optical lens includes a first lens section 21, a second lens section 22, and a third lens section 23, which are arranged sequentially from the object side to the image side along the optical axis. The first lens section 21 is located above the driving device 30, the second lens section 22 is located inside the driving device 30, and the third lens section 23 is located below the driving device 30, allowing light to pass sequentially through the first lens section 21, the second lens section 22, and the third lens section 23 of the optical lens 20.

[0071] The first lens section 21 includes a first lens barrel 211 and at least a first lens group 212 installed in the first lens barrel 211; the second lens section 22 includes a second lens barrel 221 and at least a second lens group 222 installed in the second lens barrel 221; and the third lens section 23 includes a third lens barrel 231 and at least a third lens group 232 installed in the third lens barrel 231. The first lens group 212, the second lens group 222, and the third lens group 232 cooperate with each other to form an imageable optical system.

[0072] Those skilled in the art will know that, for an imageable optical system formed by the first lens section 21, the second lens section 22, and the third lens section 23, within a predetermined range of the number of lens groups, the effective focal length of the imageable optical system is proportional to the number of optical lens groups, and its resolving power is also proportional to the number of optical lens groups.

[0073] Based on these technical requirements, if the split lens is implemented as a conventional driving device, that is, the driving device drives the overall optical lens for focusing and image stabilization, the split lens will have a relatively large height due to the fixed relative positional relationship between the lens groups, which in turn will result in a relatively large height of the driving device as a whole, making it difficult to meet the requirements of miniaturization of optical components.

[0074] To address the aforementioned technical problems, in this embodiment of the application, the middle lens portion of the split lens 20 is configured as a movable lens, that is, the relative position of the second lens portion 22 with respect to the first lens portion 21 and the third lens portion 23 can be adjusted. The first lens portion 21 and the third lens portion 23 are respectively fixed to the fixed portion of the driving device 30. In this way, during the shooting process, the second lens portion 22 of the split optical lens is set in the movable portion of the driving device 30, and the second lens portion 22 is adjusted to a predetermined position to form a clear image. This solves the problem of insufficient driving force when the driving device 30 drives the entire optical lens, while meeting the design requirements of miniaturization of optical components.

[0075] The second lens portion 22 is disposed inside the driving device 30 and connected to the movable part of the driving device 30. The driving device 30 can be configured to provide focusing driving force and optical image stabilization driving force for the second lens portion 22. That is, the movable part includes a focusing portion 32 and an optical image stabilization portion 33. In one embodiment, the second lens portion 22 is fixed within the focusing carrier 321 of the focusing portion 32 of the driving device 30. The focusing portion 32 is housed inside the optical image stabilization portion 33, and the focusing portion 32 can move synchronously with the optical image stabilization portion 33. The second lens portion 22 can be driven by the focusing portion 32 to move along the optical axis, thereby achieving focusing during shooting; the second lens portion 22 can be driven by the optical image stabilization portion 33 to move along a direction perpendicular to the optical axis, thereby achieving image stabilization during shooting.

[0076] In this embodiment, the structural configuration of the optical lens 20 and the driving device 30 allows the driving device 30 to drive the enlarged optical lens 20 to move for shooting. Specifically, the driving device 30 drives the second lens portion 22 to move. The first lens portion 21 and the third lens portion 23 are respectively fixed to the driving device 30, and the second lens portion 22 is fixed inside the driving device 30. This allows the driving device 30 to drive the portion of the optical lens 20, namely the second lens portion 22, to move, thereby achieving optical image stabilization and focusing with a relatively small driving device. This addresses the problems of large overall lens height and insufficient driving force in camera modules with large image planes.

[0077] Based on the above structure, the fixing part of the driving device 30 includes a housing 31 and a base 34. The housing has a receiving space 313. The first lens part 21 is fixed to the upper surface of the housing 31, and the third lens part 23 is fixed to the base 34. The housing 31, the first lens part 21, and the third lens part 23 form a receiving space among themselves. The second lens part 22 is fixed to the focusing part 32 on the driving device 30 and is received within the receiving space. It is disposed within the receiving space and is configured to be displaceable under the driving force of the driving device 30. The second lens part 22 is configured to move within the receiving space. Furthermore, the second lens part 22 is adapted to move in the XYZ directions within the movable space. For ease of explanation, the implementation method of optical focusing and optical image stabilization is further explained by establishing a spatial coordinate system. The optical axis of the optical system is defined as the Z-axis (i.e., the direction set by the Z-axis). A first preset direction perpendicular to the plane containing the optical axis is defined as the X-axis (i.e., the direction set by the X-axis). A second preset direction perpendicular to the plane containing the optical axis is defined as the Y-axis (i.e., the direction set by the Y-axis). In this embodiment, the X-axis and Y-axis are perpendicular to each other, and the Z-axis is perpendicular to the plane containing the X-axis and Y-axis. In other words, the X-axis, Y-axis, and Z-axis constitute a three-dimensional Cartesian coordinate system.

[0078] Specifically, such as Figures 3 to 8 As shown in the embodiment of this application, the driving device 30 includes a housing 31, a focusing part 32, an optical image stabilization part 33, and a base 34. The second lens part 22 is disposed inside the driving device 30. The focusing part 32 is configured to drive the second lens part 22 to move along the optical axis to achieve optical focusing. The optical image stabilization part 33 is configured to drive the second lens part 22 to move along a direction perpendicular to the optical axis to achieve optical image stabilization.

[0079] In some embodiments, the focusing part 32 is housed inside the optical image stabilization part 33, and the second lens part 22 is disposed on the focusing part 32. When the optical image stabilization part 33 drives the second lens part 22 to move in a direction perpendicular to the optical axis, the focusing part 32 and the second lens part 22 move together in a direction perpendicular to the optical axis to achieve image stabilization during shooting.

[0080] It is worth mentioning that the positional relationship between the focusing unit 32 and the optical image stabilization unit 33 is not limited in the optical assembly of the present invention. In some other embodiments, the optical image stabilization unit 33 may be located inside the focusing unit 32, so that when the focusing unit 32 drives the second lens unit 22 to move along the optical axis, it can simultaneously drive the optical image stabilization unit 33 to move along the optical axis, thereby achieving focusing during the shooting process.

[0081] Furthermore, such as Figure 3 As shown, the housing 31 of the driving device 30 has a main body 311 and a supporting portion 312. The main body 311 of the housing 31 is hollow and annular, with the upper end near the object side extending inward to form the supporting portion 312, which supports the first lens portion 21. The supporting portion 312 has at least one opening 3121 and at least one clearance groove 3122. The opening 3121 corresponds to the first lens portion 21 so that light enters through the first lens portion 21. The clearance groove 3122 is formed radially along the opening 3121 or along the optical axis, and the clearance groove 3122 is disposed between the supporting surface 312 and the first lens portion 21. The housing 31 also has a receiving space 313, which is formed by the main body 311 and the supporting portion 312, to accommodate the focusing portion 32 and the optical image stabilization portion 33.

[0082] Furthermore, in this embodiment, the clearance groove 3122 forms an adjustment space for the second lens portion 22, facilitating the adjustment of the position of the second lens portion 22 during subsequent assembly. In one specific embodiment, there can be two clearance grooves 313, respectively disposed on both sides of the second lens portion 22 and symmetrically arranged with respect to the second lens portion 22; or there can be four clearance grooves 313, equally spaced around the second lens portion 22.

[0083] The clearance groove 3122 is designed to facilitate process assembly. When assembling optical components, the assembly equipment clamps the second lens part 22 located inside the drive device 30 from the outside and performs assembly by adjusting the imaging quality of the entire lens optical imaging system in real time, thereby improving the accuracy, reliability and efficiency of assembly.

[0084] In a specific example of this application, such as Figures 4 to 5As shown, the focusing unit 32 includes a focusing carrier 321, at least one focusing coil 322, at least one focusing magnet 323, a frame 324, a holding member 325, and a focusing sensing member 326. The focusing carrier 321 has a supporting outer side 3211, a supporting inner side 3212 corresponding to the supporting outer side, and a light-transmitting hole 3213. The light-transmitting hole 3213 is located inside the focusing carrier 321. The second lens portion 22 is disposed in the light-transmitting hole 3213 and fixed to the supporting inner side 3212 of the focusing carrier 321. The focusing coil 322 is disposed on the supporting outer side 3211 of the focusing carrier 321. The focusing magnet 323 is disposed on the frame 324, corresponding to the position of the focusing coil 322. When the focusing coil 322 is energized, it interacts with the focusing magnet 323, causing the focusing part 32 to drive the second lens part 22 to move along the optical axis, thereby achieving focusing.

[0085] More specifically, the focusing carrier 321 is annular, the second lens portion 22 is disposed on the inner side 3212 of the focusing carrier 321, the focusing coil 322 is wound around the outer side 3211 of the focusing carrier 321, and the focusing magnet 323 is disposed around the focusing coil 322. The frame 324 is annular and located outside the second lens portion 22, wherein there can be two focusing magnets 323, which are symmetrically disposed on opposite sides of the frame 324.

[0086] In some embodiments, the outer bearing side 3211 of the focusing carrier 321 forms an annular winding groove 3214, wherein the focusing coil 322 is wound around the winding groove 3214 of the focusing carrier 321 to ensure that the focusing coil 322 is fixedly disposed on the outer bearing side 3211 of the focusing carrier 321.

[0087] In other embodiments, the outer bearing side 3211 of the focusing carrier 321 is formed with a plurality of protrusions for surrounding the focusing coil 322, which is arranged symmetrically on the side.

[0088] It is worth mentioning that the assembly method of the focusing magnet 323 and the frame 324 is not limited in the optical assembly of the present invention. For example, the focusing magnet 323 can be glued to the inner wall of the frame 324 so that the focusing magnet 323 is fixedly disposed in the frame 324. Figure 1In a specific embodiment of the optical component shown in FIG5, the frame 324 includes at least one mounting slot 3241, wherein the focusing magnet 323 is mounted in the mounting slot 3241 of the frame 324 to fix the focusing magnet 323 inside the mounting slot 3241 of the frame 324.

[0089] In some embodiments, the second lens barrel 211 and the focusing carrier 321 may be of the same structure, with the second lens group 222 directly fixed inside the focusing carrier 321. That is, the second lens group 222 is directly disposed on the inner support side 3212 of the focusing carrier 321, directly forming the second lens portion 22. The number of second lens groups 222 may be multiple or one. This design, where the second lens group 222 is directly fixed inside the focusing carrier 321 to form the second lens portion 22, not only ensures the integrity of the optical system but also simplifies the structural design of the drive components, achieving miniaturization of the overall structure.

[0090] Furthermore, the focusing unit 32 also includes a retainer 325 for movably holding the focusing carrier 321 to the frame 324. (Reference) Figures 4 to 5 The retaining member 325 may include at least one elastic member. More specifically, the retaining member 325 includes an upper elastic member 3251 and a lower elastic member 3252. The upper elastic member 3251 is fixed to the upper surface of the focusing part 32 and the upper surface of the frame 324, that is, the upper elastic member 3251 is disposed on the light-incident side of the second lens part 22. The lower elastic member 3252 is fixed to the lower surface of the focusing part 32 and the lower surface of the frame 324, that is, the lower elastic member 3252 is disposed on the light-outceasing side of the second lens part 22. Thus, the upper elastic member 3251 and the lower elastic member 3252 cooperate with the focusing carrier 321 to allow the second lens part 22 to be suspended and held inside the frame 324. The upper elastic member 3251 and the lower elastic member 3252 are generally in the shape of thin sheets. Through the action of the upper elastic member 3251 and the lower elastic member 3252, the focusing carrier 321 is held inside the frame 324. The upper and lower elastic members can not only keep the focusing carrier 321 in the frame 324, but also provide a restoring force by utilizing their own elasticity. That is, when the focusing carrier 321 moves along the optical axis to move the second lens part 22 for focusing under the action of the driving force, the holding member 325 can use its own elastic force to make the focusing carrier 321 return to the initial position.

[0091] Furthermore, the focusing unit 32 also includes a focusing circuit 327, which is interconnected with the circuit on the frame 324 to ensure the circuit connection of the focusing unit 32. The focusing circuit 326 is formed inside the focusing carrier 321 by injection molding, and the circuit interface of the focusing circuit 326 is reserved on the surface of the focusing carrier 321, so that the focusing coil 322 is electrically connected to the frame 324 through the focusing circuit 326, thereby forming the working circuit of the focusing unit 32 to ensure that the focusing unit 32 provides focusing driving force to the second lens unit 22 after being powered on.

[0092] It is worth mentioning that, in the embodiments of this application, the focusing unit 32 further includes a focusing sensor 326, which is mainly used to sense the position of the focusing carrier 321 and focus according to the shooting requirements to obtain a clear image. The focusing sensor 326 includes an IC controller 3261 and a position sensor 3262. The IC controller is mainly used to control the current in the focusing coil 322, including the magnitude and direction of the current, based on the position information monitored by the position sensor 3262, to adjust the position of the focusing carrier 321.

[0093] The optical image stabilization unit 33 includes an optical image stabilization carrier 331, at least one optical image stabilization coil 332, and at least one optical image stabilization magnet 333. The optical image stabilization unit 33 is mainly used to achieve image stabilization during the shooting process, so as to drive the second lens unit 22 to move along the direction perpendicular to the optical axis. Specifically, the direction perpendicular to the optical axis in this application mainly refers to the X direction and the Y direction.

[0094] In some embodiments, the focusing carrier 321 is housed inside the optical image stabilization carrier 331, the optical image stabilization carrier 331 having a mounting position for the optical image stabilization magnet 333, and the optical image stabilization magnet 333 being fixed to the mounting position formed by the optical image stabilization carrier 331.

[0095] In some embodiments, the optical image stabilization carrier 331 is square-shaped and annular. There may be four optical image stabilization magnets 333, which are symmetrically arranged on the optical image stabilization carrier 331. The optical image stabilization coil 332 is arranged below the optical image stabilization magnets 333 and corresponds one-to-one with the optical image stabilization magnets 333, and is used to provide the driving force for optical image stabilization.

[0096] The optical image stabilization unit 33 further includes at least one optical image stabilization sensor 334, which is mainly used to sense the position of the optical image stabilization carrier 331. The second lens part 22 is housed inside the optical image stabilization carrier 331. The second lens part 22 moves with the movement of the optical image stabilization carrier 331, thereby adjusting the position of the second lens part 22 in the horizontal direction perpendicular to the optical axis to achieve shake correction during shooting.

[0097] The optical image stabilization sensor 334 includes an X-direction sensor 3341 and a Y-direction sensor 3342. The X-direction sensor 3341 and the Y-direction sensor 3342 are used to monitor the position of the optical image stabilization carrier 331 and feed back its position information to the drive device control center. The drive device control center controls the current in the optical image stabilization coil 332, including the magnitude and direction of the current, according to the feedback position information, so as to adjust the position of the optical image stabilization carrier 331.

[0098] It is worth mentioning that, in a specific embodiment of this application, the focusing unit 32 and the optical image stabilization unit 33 share the same set of magnets, that is, the optical image stabilization magnet 333 and the focusing magnet 323 are the same set of magnets. Simultaneously, the frame 324 of the focusing unit 32 and the optical image stabilization carrier 331 have the same structure, that is, the focusing coil 322 is disposed on the focusing carrier 321, located inside the frame 324, and the focusing magnet 323 is disposed on the frame 324, serving as a shared magnet for both focusing and optical image stabilization. The optical image stabilization coil 332 is disposed at a position corresponding to the focusing magnet 322. Furthermore, by increasing the height of the shared magnet of the focusing unit 32 and the optical image stabilization unit 33, the shared magnet simultaneously cooperates with other components of the focusing unit 32 and the optical image stabilization unit 33 to drive the second lens unit 22 to move along the optical axis and in directions perpendicular to the optical axis. This allows for the reduction of structural components, resulting in a more compact structure and a smaller size of optical components, thus achieving miniaturization.

[0099] By rationally designing the drive device 30, the focusing unit 32 for driving the second lens unit 22 and the optical image stabilization unit 33 for driving the second lens unit 22 share some driving components, so as to make full use of the internal space of the drive device 30 and reduce the height of the optical components.

[0100] In other embodiments of this application, the common magnet of the focusing part 32 and the optical image stabilization part 33 may also be used in other ways to drive the second lens part 22 to move in conjunction with other components of the focusing part 32 and the optical image stabilization part 33. This is not limited to this application.

[0101] The optical image stabilization coil 332 is located at a position corresponding to the optical image stabilization magnet 333. In some embodiments, the optical image stabilization coil 332 is disposed below the optical image stabilization magnet 333, located on the lower surface of the optical image stabilization carrier 331. The optical image stabilization coil 332 is located within the magnetic field of the optical image stabilization magnet 333. When the optical image stabilization coil 332 is energized, it provides sufficient driving force to the second lens section 22 to achieve large-stroke image stabilization.

[0102] To ensure the optical image stabilization unit 33 is connected during operation and to provide the optical image stabilization carrier 331 with the driving force to move along the X / Y direction, the optical image stabilization drive unit 33 further includes an optical image stabilization circuit 335. The optical image stabilization circuit 335 is mainly used to connect the optical image stabilization coil 332 and to provide the optical image stabilization sensor 334 with the current required during its operation.

[0103] refer to Figures 1 to 8 To ensure more stable installation of the drive device 30 and the third lens portion 23, this application also provides a base 34 adapted to the third lens portion 23. The base 34 includes a base body 341, base support columns 342 disposed on the base body 341, and a support portion 343. The base support columns 342 extend integrally upward along the corner area of ​​the base body 341, forming a mounting surface with a height difference between the base support columns 342 and the surface of the base body 341. The number of base support columns 342 is at least two, and preferably, the base support columns 342 are symmetrically disposed on the base body 341 and fixed to the base body 341. In a specific embodiment of this application, the base support columns 342 are located at the four corners of the base body 341, extending integrally upward along the four corner areas of the base body 341, and are symmetrically distributed.

[0104] The base 34 surrounds the third lens portion 23. The peripheral area of ​​the base body 341 of the base 34 extends downward to form a ring structure, which serves as the support portion 343. The support portion 343 and the base body 341 form a mounting position for mounting the third lens portion 23. Specifically, the lower surface of the base body 341 and the inner surface of the support portion 343 form the mounting position, and the third lens barrel 231 of the third lens portion 23 rests against the mounting position of the base 34.

[0105] In some embodiments, the specific formation of the base support column 342 and the support portion 343 is not limited to this application. The base support column 342 and the support portion 343 can be integrally formed with the base body 341 by injection molding, or they can be further formed on the already formed base body 341 by injection molding.

[0106] The optical image stabilization coil 332 is disposed on the base 34. More specifically, the optical image stabilization coil 332 includes an X-direction stabilization coil and a Y-direction stabilization coil, and is disposed on the base body 341, opposite to the optical image stabilization magnet 334.

[0107] The optical image stabilization coil 332 is disposed on the upper surface of the base 34. Device mounting positions are provided around the light-transmitting hole on the upper surface of the base 34. The device can be a position sensor, a coil, or a circuit board. In this application, the optical image stabilization coil 332 is disposed on the base 34 and evenly distributed around the light-transmitting hole. There can be multiple optical image stabilization coils; in a specific embodiment, there can be four optical image stabilization coils 332, consistent with the number of optical image stabilization magnets 333 in this application. After the optical image stabilization coil 332 is fixed to the base 34, an optical image stabilization magnet 333 is correspondingly disposed above the optical image stabilization coil 332. The optical image stabilization magnet 333 is fixedly disposed on the frame 324, and its lower surface is parallel to the upper surface of the optical image stabilization coil 332 after installation.

[0108] In other embodiments, the third lens barrel 231 of the third lens section 23 may be integrally formed with the base 34, that is, the third lens group 232 is directly disposed on the mounting position of the base 34.

[0109] In some embodiments, the third lens group 232 of the third lens group 23 protrudes from the third lens barrel 231. After the third lens group 23 is fixed to the base body 341, the top of the third lens group 23 is flush with the upper surface of the base 34, that is, a certain gap is reserved between the second lens group 22 and the third lens group 23. In some embodiments, the base 34 extends along its upper surface base surface, and the extension surface is a horizontal surface. The extension surface can be used to install the housing 31 of the driving device, and the housing 31 can also serve as the mounting surface of the first lens part 21. The horizontal surface extending from the base is in horizontal contact with the housing 31 of the driving device, which can ensure the flatness of the driving structure installation.

[0110] Meanwhile, an optical image stabilization sensor mounting groove 3412 is formed on the upper surface of the base body 341 of the base 34. The optical image stabilization sensor mounting groove 3412 is formed on the base 34 by an internal recess, forming a groove-like structure on the base 34 to accommodate the optical image stabilization sensor 334. The sensor 334 is connected to the optical image stabilization circuit 335 embedded inside the base 34 to provide the optical image stabilization sensor 334 with the current required for its operation.

[0111] The optical image stabilization sensor mounting slot 3412 includes an X-direction mounting slot and a Y-direction mounting slot, which are respectively located on two adjacent sides of the base body 341. The optical image stabilization coil 332 is located on the upper surface of the base 34. There are multiple optical image stabilization coils 332. In this application, there can be four optical image stabilization coils 332, which are respectively arranged around the light-transmitting hole on the upper surface of the base 34. The optical image stabilization sensor 334 is located in the center of the optical image stabilization coil 332 and corresponds to the position of the lower surface of the optical image stabilization magnet 333, so as to monitor the position of the optical image stabilization carrier 331 at any time.

[0112] To enable the optical image stabilization unit 33 to move more smoothly in a plane perpendicular to the optical axis, in some embodiments, the driving device 30 further includes a guide support structure 35 to improve the stability of movement during optical image stabilization. The guide support structure 35 is disposed between the optical image stabilization carrier 331 and the base 34. More specifically, the guide support structure 35 is disposed between the optical image stabilization carrier 331 and the base body 341, so that during the movement of the optical image stabilization carrier 331 relative to the base 34, the guide support structure 35 can always provide support and guidance for the optical image stabilization carrier 331, enabling the optical image stabilization carrier 331 to move smoothly.

[0113] The guide support structure 35 is disposed between the base 34 and the optical image stabilization carrier 331, ensuring that the base 34 and the optical image stabilization carrier 331 maintain movable contact at all times through the guide support structure 35. When the optical image stabilization coil 332 is energized, the optical image stabilization coil 332 interacts with the optical image stabilization magnet 333, driving the optical image stabilization carrier 331 to move along the X-axis and Y-axis directions.

[0114] refer to Figure 7In a specific embodiment, the guide support structure 35 is implemented as a mechanism with a track-ball bearing structure. The guide support structure 35 includes a track disposed between the optical image stabilization carrier 331 and the base 34, and balls 351 disposed within the track. Since the balls are disposed within the limiting area, the movement trajectory of the balls is restricted within the track. The balls can slide or roll within the limiting area according to a preset movement pattern, which reduces the friction during the movement of the optical image stabilization unit 33 while ensuring the parallelism of the optical image stabilization unit 33 during movement.

[0115] The ball bearings 351 include at least two, preferably three or more, and are disposed at a corner or side of the base 34. The bottom of the optical image stabilization carrier 331 has a downwardly extending or recessed first limiting region 3311, and the base body 341 of the base 34 has an upwardly extending or recessed second limiting region 3411. The first limiting region 3311 and the second limiting region 3411 form a receiving position for accommodating the ball bearings 351, thereby confining the ball bearings within the space formed by the two regions to assist in the movement of the image stabilization carrier 331. Furthermore, in this embodiment, the shape of the track is not limited to this application and can be implemented as a cross shape, rectangle, etc. It should be understood that the shape of the track guides the optical image stabilization carrier 331 to move with the second lens portion 22. In some embodiments, the limiting region is implemented as including a track extending along the X-axis and / or along the Y-axis.

[0116] In some embodiments, the driving device 30 further includes a stabilizing member 36, which may be a magnetically conductive member 361. The magnetically conductive member 361 is disposed within the base body 341 of the base 34 and is located directly below the optical image stabilizing magnet 333. The magnetically conductive member 361 may be an iron sheet, which generates an attractive force with the optical image stabilizing magnet 333 fixed on the optical image stabilizing carrier 331, so that the optical image stabilizing part 33 and the base 34 remain relatively stable, thereby assisting the movement of the optical image stabilizing carrier 331.

[0117] In some embodiments, the number of magnetically conductive components 361 is four, and the number of optical image stabilization coils 332, optical image stabilization magnets 333 and magnetically conductive components 361 are the same. The optical image stabilization magnets 333 are arranged along the four sides of the optical image stabilization carrier 331.

[0118] The formation method of the magnetic conductive component 361 is not limited to that of this application. In some embodiments, the magnetic conductive component 361 is integrally formed on the base body 341 of the base 34 by an insert injection molding process. The magnetic conductive component 361 can also be fixed to the base body 341 of the base 34 by adhesive, so that the magnetic conductive component 361 can be opposite to the magnet 333.

[0119] The drive device 30 further includes an electrical connection member 37, which is disposed on the base 34 and electrically connected to the retainer 325, so as to provide a working circuit connection for the focusing coil 322 and the optical image stabilization coil 332 through the electrical connection member 37 and the retainer 325.

[0120] refer to Figures 1 to 5 In one specific embodiment, the electrical connection member 37 includes an upper end portion 371, a middle portion 372, and a lower end portion 373. The upper end portion 371, the middle portion 372, and the lower end portion 373 are electrically connected to each other.

[0121] The middle portion 372 of the electrical connection member 37 is disposed within the base body 341. The upper end portion 371 of the electrical connection member 37 extends integrally upward from the base body 341 along the base support column 342, and the lower end portion 373 extends downward from the base body 341 to achieve electrical conduction with circuit elements outside the drive device 30. The middle portion 372 of the electrical connection member 37 includes a plurality of electrical connection elements. At least one of the plurality of electrical connection elements in the middle portion 372 of the electrical connection member 37 extends integrally upward to the top of the base support column 342 to form the upper end portion 371 of the electrical connection member 37. At least one of the plurality of electrical connection elements in the middle portion 372 of the electrical connection member 37 extends integrally downward to the bottom end of the support portion 343 of the base 34 to form the lower end portion 373 of the electrical connection member 37.

[0122] The formation method of the electrical connection member 37 is not limited to that of this application. In one specific embodiment, the electrical connection member 37 is integrally formed onto the base 34 by an insert injection molding process. That is, the middle part 372 of the electrical connection member 37 is integrally formed into the base body 341, the upper end 371 of the electrical connection member 37 is integrally formed into the base support 342, and the lower end 373 of the electrical connection member 37 extends downward from the base body 341, or it can be integrally formed into the support part 343 and extend to the bottom of the support part 343, exposing the electrical contact point. In other embodiments, the electrical connection member 37 is formed onto the surface of the base body 341 by attachment, and a flexible plate structure is formed on the outer periphery of the support part 343. The lower end 373 is disposed within the flexible plate structure to achieve flexible electrical connection.

[0123] Furthermore, the middle portion 372 of the electrical connection member 37 includes circuitry for focusing and image stabilization. The focusing coil 322 is electrically connected to the upper end portion 371 of the electrical connection member 37 via the upper elastic member 3251 or the lower elastic member 3252. The optical image stabilization coil 332 is electrically connected to the middle portion 372 of the electrical connection member 37. More specifically, the focusing coil 322 is electrically connected to the upper elastic member 3251 or the lower elastic member 3252 via the focusing circuit 327. The upper elastic member 3251 or the lower elastic member 3252 is electrically connected to the middle portion 372 of the electrical connection member 37. The optical image stabilization coil 332 is electrically connected to the optical image stabilization circuit 335. The optical image stabilization circuit 335 is electrically connected to the middle portion 372 of the electrical connection member 37.

[0124] Specifically, the upper elastic member 3251 or the lower elastic member 3252 used to conduct the focusing coil 332 includes a focusing elastic portion 32511 and an image stabilizing elastic portion 32512, which extend in a plane perpendicular to the optical axis. The focusing elastic portion 32511 is located on the inner periphery of the image stabilizing elastic portion 32512. The inner side of the focusing elastic portion 32511 extends to and is fixed to the upper surface of the focusing carrier 321, and the outer side of the focusing elastic portion 32511 extends to and is fixed to the upper surface of the frame 324. The inner side of the image stabilizing elastic portion 32512 extends to and is fixed to the upper surface of the frame 324, and the outer side of the image stabilizing elastic portion 32512 extends to and is fixed to the upper surface of the base support 342 of the base 34. The driving device 30 is adapted to drive the focusing carrier 321 to move relative to the frame 324 along the direction set by the optical axis for optical focusing, and the driving device 30 is adapted to drive the frame 324 to move the focusing carrier 324 carrying the optical lens in a plane perpendicular to the optical axis for optical image stabilization.

[0125] When the driving device 30 drives the focusing carrier 321 to move along the direction set by the optical axis (i.e., the Z-axis direction), the focusing elastic portion 32511 deforms to accumulate elastic force; when the driving device 30 stops driving, the elastic force of the focusing elastic portion 32511 is released, driving the focusing carrier 321 to return to its original position. When the driving device 30 drives the frame 324 to move along the X-axis and Y-axis directions in a plane perpendicular to the optical axis, the image stabilization elastic portion 32512 deforms to accumulate elastic force; when the driving device 30 stops driving, the elastic force of the image stabilization elastic portion 32511 is released, driving the frame 324 to return to its original position.

[0126] The second lens section 22 is disposed within the driving device 30. Under the driving force of the driving device 30, the second lens section 22 can move along the optical axis to achieve focusing, or it can move in a plane perpendicular to the optical axis to achieve optical image stabilization. In order to achieve better image quality, in the optical design, in a specific embodiment, the optical sensitivity of the second lens section 22 is higher than that of other lens sections. The second lens section 22 includes an optical area and a structural area. In a specific embodiment, the size of the optical area boundary of the second lens section 22 relative to the optical axis is smaller than that of the optical area of ​​the first lens section 21 relative to the optical axis, and the size of the optical area boundary of the second lens section 22 relative to the optical axis is smaller than that of the optical area of ​​the third lens section 23 relative to the optical axis.

[0127] The third lens 23 is disposed at the mounting position of the base 34, wherein there are multiple third lens groups 232, and in this application, there are more than three third lens groups 232.

[0128] Furthermore, a first gap is reserved between the first lens portion 21 and the second lens portion 22 in the direction along the optical axis, and a second gap is reserved between the second lens portion 22 and the third lens portion 23 in the direction along the optical axis.

[0129] More specifically, the lower end face of the bearing portion 312 of the housing 31 and the bottom of the first lens portion 21 constitute the upper top surface of the accommodating space 313, the upper end face of the focusing carrier 321 and the top of the second lens portion 22 constitute the upper moving end face of the movable portion, and the upper top surface of the accommodating space 313 and the upper moving end face of the movable portion constitute the first gap.

[0130] The upper surface of the base body 341 and the top of the third lens part 23 constitute the lower bottom surface of the accommodating space 313. The lower end surface of the focusing carrier 321 and the bottom of the second lens part 22 constitute the lower moving end surface of the movable part. The lower bottom surface of the accommodating space 313 and the lower moving end surface of the movable part constitute the second gap.

[0131] The first gap is used for the second lens portion 22 to move upward along the optical axis, and the second gap is used for the second lens portion 22 to move downward along the optical axis.

[0132] The main body 311 of the housing 31 forms the peripheral side of the receiving space 313, and the outer peripheral side of the optical image stabilization carrier 331 and the peripheral side of the receiving space 313 form the third gap, which is used for the optical image stabilization carrier 331 to move horizontally in a direction perpendicular to the optical axis.

[0133] The peripheral side of the optical image stabilization carrier 331 and the base support 342 form the fourth gap, which limits the travel distance of the optical image stabilization carrier 331 in a horizontal movement perpendicular to the optical axis.

[0134] The third gap and the fourth gap are used for the optical image stabilization carrier 331 to move in a horizontal direction perpendicular to the optical axis, that is, the horizontal gap between the housing 31 and the optical image stabilization carrier 331 is greater than the travel distance of the optical image stabilization carrier 331 moving in a horizontal direction perpendicular to the optical axis.

[0135] The movable part formed by the focusing unit 32, the optical image stabilization unit 33, and the second lens unit 22 is housed in the receiving space 313 of the housing 31. Within the receiving space 313, the second lens unit 22 moves along the optical axis or in a direction perpendicular to the optical axis under the action of a driving force, so as to realize the optical focusing and optical image stabilization functions of the camera module.

[0136] The housing 31 provides a support surface for the first lens section 21, holding the first lens section 21 above the second lens section 22. On the other hand, the housing 31 and the base 34 form a receiving space, limiting the travel space of the focusing section 32 and the optical image stabilization mechanism 33.

[0137] In summary, the specific structure of the optical component based on the embodiments of this application has been clarified. The optical component resolves the contradiction between insufficient driving force of the driving device 30 and increased motor size by driving the second lens section 22 of the split optical lens 20 to move. By driving the second lens section 22 to move, focusing and image stabilization during the shooting process are achieved using a single driving device 30, effectively utilizing the internal space of the driving device and reducing the overall height of the optical component.

[0138] Example of a camera module

[0139] According to a second aspect of the invention, such as Figures 9 to 10 As shown, the optical component is integrated with a photosensitive component 40 to form a camera module. The photosensitive component 40 includes at least a circuit board 41, at least one photosensitive chip 42, and a filter element 43. The photosensitive chip 42 is mounted and electrically connected to the circuit board 41, and the filter element 43 is held in the light-sensing path of the photosensitive chip 42. The optical component is held in the light-sensing path of the photosensitive component 40, so that light entering the optical component passes through the optical component and reaches the photosensitive chip 42 of the photosensitive component 40, thereby achieving imaging.

[0140] The circuit board 41 serves as the substrate of the photosensitive component 40, supporting other parts of the photosensitive component 40. The circuit board 41 may have a first surface 411 and a second surface 412 opposite to the first surface 411, with the first surface 411 facing the object side and the second surface 412 facing away from the object side. The circuit board 41 includes a circuit board body, a connecting strip, and a connector portion (wherein the connecting strip and the connector portion are not shown in the figure). The connecting strip portion connects the circuit board body and the connector portion to achieve electrical conduction between the circuit board body and the connector portion, and the connector is used for connection with external devices.

[0141] The photosensitive chip 42 may be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The photosensitive chip 42 may include a centrally located photosensitive area and a non-photosensitive area surrounding the photosensitive area. The photosensitive area of ​​the photosensitive chip 42 can receive light via an optical system including the first lens component 21, the second lens component 22, and the third lens component 23, and has a photosensitive path corresponding to the photosensitive area.

[0142] The photosensitive chip 42 can be disposed on the first surface 411 of the circuit board 41. Specifically, the photosensitive chip 42 can be mounted on the central area of ​​the first surface 411 of the circuit board 41.

[0143] The specific implementation of the electrical connection between the photosensitive chip 42 and the circuit board 41 is not limited to this application. For example, the photosensitive chip 42 can be electrically connected to the circuit board body of the circuit board 41 by means of wire bonding (gold wire bonding), soldering, flip-chip (FC), redistribution layer (RDL), etc. Exemplarily, the electrical connection can be implemented as wire bonding. After the photosensitive chip 42 is mounted on the circuit board 41, one end of the gold wire is connected to the photosensitive chip 42 and the other end is connected to the circuit board 41 by a gold wire bonding process. The connecting wire can also be other types, such as silver wire, copper wire, etc.

[0144] In some embodiments, the circuit board 41 has a mounting groove for accommodating the photosensitive chip 42, and the shape of the mounting groove corresponds to the shape of the photosensitive chip 42. Exemplarily, the depth of the mounting groove may be equal to the thickness of the circuit board 41. The photosensitive assembly 40 may also include a reinforcing plate 46, which allows the photosensitive chip 42 to be completely embedded in the mounting groove of the circuit board 41 when the thickness of the photosensitive chip 42 is less than or equal to the thickness of the circuit board 41. The reinforcing plate 46, such as a steel plate, may also be disposed on the second surface 411 of the circuit board 41 to enhance the strength of the circuit board 41.

[0145] In other embodiments, the depth of the mounting groove may be less than the thickness of the circuit board 41, and when the photosensitive chip 42 is embedded in the mounting groove, the photosensitive chip 42 may protrude from the first surface 411 of the circuit board 41. Similarly, the reinforcing plate 46, such as a steel plate, may also be provided on the second surface 412 of the circuit board 41 to enhance the strength of the circuit board 41.

[0146] By providing a mounting slot on the circuit board 41 that cooperates with the photosensitive chip 42, the overall volume and weight of the photosensitive component 40 can be reduced, which is beneficial to reducing the height of the photosensitive component 40 and realizing the miniaturization of its overall structure.

[0147] The filter element 43 is held in the photosensitive path of the photosensitive chip 42 to filter the imaging light entering the photosensitive chip 42. In some embodiments, the photosensitive assembly 40 further includes a bracket 44 for supporting and holding the filter element 43. The filter element 43 is mounted on the bracket 44 and corresponds to at least a portion of the photosensitive area of ​​the photosensitive chip 42 to be held in the photosensitive path of the photosensitive chip 42.

[0148] The way the bracket 44 is combined with the circuit board 41 is not limited to this application. The bracket 44 can be formed separately to create a structure independent of the circuit board 41. The filter element bracket 44 is attached to the circuit board 41 with an adhesive and can be used to support other components. In other embodiments, the filter element bracket 44 and the circuit board 41 are integrally formed at a predetermined position on the circuit board body through a molding process. The photosensitive component 40 also includes at least one electronic component 45, which is disposed on the circuit board 41 and electrically connected to the circuit board 41. The electronic component 45 can be disposed on the first surface 411 of the circuit board 41 and spaced apart from the photosensitive chip 42. Specifically, the electronic component 45 can be mounted on the edge area of ​​the first surface 411 of the circuit board 41 and spaced a certain distance from the photosensitive chip 42. The electronic component 45 can be, for example, implemented as a capacitor, resistor, driver device, etc.

[0149] The bracket 44 is disposed on the first surface 411 of the circuit board 41 and has a stepped light-transmitting hole, which corresponds to the light-sensing path of the photosensitive chip 42. The stepped light-transmitting hole may have at least two cavities with different diameters, and the cavity furthest from the photosensitive chip 42 may be the first cavity.

[0150] In one embodiment, the bracket 44 may have a top surface parallel to the first surface 411 of the circuit board 41, and the stepped light-transmitting hole near the cavity of the photosensitive chip 42 may have an inclined inner surface. Exemplarily, the bracket 44 may be disposed in the edge region of the first surface 41 of the circuit board 41 and may not overlap with the photosensitive chip 42. Alternatively, the bracket 44 may be disposed in the edge region of the first surface 411 of the circuit board 41 and may overlap with the non-photosensitive area of ​​the photosensitive chip 42.

[0151] The bracket 44 integrates the connecting wires between the circuit board 41 and the photosensitive chip through a molding process. While protecting the gold wires, it can replace the traditional color filter element bracket, reduce the weight of the camera module, and lower the height of the camera module.

[0152] In some embodiments, the bracket 44 encapsulates the electronic component 45 and connecting wires, forming an integral unit with the circuit board 41 through a molding process. In other words, the electronic component 45 can be encapsulated within the bracket 44. Exemplarily, the integral unit formed by the bracket 44 and the circuit board 41 may also include the non-photosensitive area of ​​the photosensitive chip 42. Encapsulating the electronic component 45 between the bracket 44 and the circuit board 41 effectively protects the electronic component 45.

[0153] The color filter element 43 can be disposed within the first cavity of the stepped light-transmitting aperture, and the thickness of the color filter element 43 on the optical axis is less than or equal to the height of the first cavity of the stepped light-transmitting aperture on the optical axis, forming a gap between the color filter element 43 and the photosensitive chip 42. When the thickness of the color filter element 43 is less than or equal to the height of the first cavity of the stepped light-transmitting aperture on the optical axis, the color filter element 43 can be on the same plane as the top surface of the bracket 44, or recessed relative to the top surface of the bracket 44. This helps to reduce the overall height of the photosensitive assembly 40, thereby reducing the overall height of the camera module. In addition, by using the bracket 44 to support the color filter element 43, the separately set mounting seat of the color filter element 43 can be eliminated, which can reduce the overall size and weight of the photosensitive assembly 40, which is beneficial to the accuracy of image stabilization control of the photosensitive assembly 40, and enables the miniaturization of the overall structure of the formed camera module.

[0154] This application provides a large-chip camera module structure, such as... Figure 10 As shown, the camera module structure includes the module housing 10, optical lens 20, driving device 30, and photosensitive component 40. The optical lens is a split optical lens, including a first lens section 21, a second lens section 22, and a third lens section 23. During the imaging process of the optical system, the positions of the first lens section 21 and the third lens section 23 are fixed, while the second lens section 22 is adjustable.

[0155] Furthermore, the driving device 30 is fixedly connected to the second lens section 22, and under the action of the driving device 30, the second lens section 22 can move along the direction of the optical axis and perpendicular to the optical axis during operation, so as to realize the focusing and image stabilization functions during the shooting process.

[0156] The camera module further includes a photosensitive component 40, which is located directly below the driving device 30. The center of the optical axis of the driving device 30 is aligned with the center of the photosensitive component 40. The photosensitive component 40 mainly receives light passing through the optical system to form the captured image.

[0157] Furthermore, the photosensitive component 40 is formed using a molding process, in which the non-photosensitive area of ​​the photosensitive chip 42, the electronic components 45, and the connecting lines between them are molded inside the formed support 44, and a mounting structure for the color filter element 43 is formed on it. The strength of the circuit board is increased by using a reinforcing plate 46 set at the bottom of the circuit board 41 to ensure the flatness of the large chip in this solution. While reducing the overall height of the photosensitive component 40, the stability of the overall structure is ensured.

[0158] In some embodiments, such as Figure 10 As shown, the camera module also includes a module housing 10, which houses the aforementioned components within the space formed between itself and the photosensitive assembly 40. The upper surface of the module housing 10 has an opening that houses the first lens portion 21, and the light-receiving aperture of the first lens portion 21 is aligned with the center of the opening. The lower surface of the module housing 10 is bonded and fixed to the edge of the circuit board of the photosensitive assembly 40 to better protect the internal components and ensure the stability of the overall structure.

[0159] The camera module structure provided in this application has a built-in image sensor 42 with a size exceeding one inch, which can significantly improve the image quality of the camera module. Simultaneously, the internal focusing technology of the optical lens 20—that is, driving a portion of the lens to move to achieve focusing and image stabilization during shooting—ensures overall structural miniaturization while providing a large-size image sensor for image stabilization and focusing. Furthermore, by using a driven portion of the lens for shooting and image stabilization, while the other lens sections remain fixed during shooting, the fixed portion of the lens can be used to perform real-time position correction of the movable lens sections, resulting in a more accurate optical imaging system, while also simplifying the assembly process and improving assembly precision.

[0160] In particular, compared to conventional camera modules with large chips, the drive-split optical lens provided in this application moves part of the lens group to achieve focusing and shake correction, which can solve the contradiction between increasing the motor driving force and increasing the motor size, resulting in a miniaturized camera module structure.

[0161] Assembly method of optical components

[0162] According to another aspect of the present invention, the present invention further provides a method for assembling optical components, namely a driving device and an optical lens, wherein the assembly method includes the following steps:

[0163] (a) Provide an optical lens 20, the optical lens 20 including a first lens portion 21, a second lens portion 22 and a third lens portion 23 arranged sequentially from the object side to the image side along the optical axis; (b) Fix the third lens portion 23 to the fixing portion of the optical assembly;

[0164] (c) Position the first lens section 21 along the optical axis of the third lens section 23;

[0165] (d) Assemble and calibrate the first lens section 21, the second lens section 22 and the third lens section 23 to form an optical lens 20 with clear imaging;

[0166] (e) Fix the first lens portion 21 to the fixed portion, and fix the second lens portion 22 to the movable portion of the optical component.

[0167] In one specific embodiment, the optical assembly includes an optical lens 20 and a driving device 30. The movable part of the optical assembly includes a focusing carrier 321 of the driving device 30, and the fixed part of the optical assembly includes a housing 31 and a base 34. The optical lens 20 includes a first lens section 21, a second lens section 22, and a third lens section 23. The relative positions of the first lens section 21 and the third lens section 23 are defined by the housing 31 and the base 34 of the driving device 30, respectively. The second lens section 22 is supported by the focusing carrier 321 inside the driving device 30 and maintains a certain distance from the first lens section 21 and the third lens section 23.

[0168] In one specific embodiment, step (d) of the optical component assembly method, assembling and calibrating the first lens section, the second lens section, and the third lens section, includes:

[0169] Using the third lens section as a reference, calibrate the gap of the second lens section in the Z direction;

[0170] Using the third lens section and the second lens section as a reference, the gap in the Z direction of the first lens section is corrected;

[0171] Using the third lens section as a reference, the position of the second lens section in the XY direction is corrected;

[0172] Using the third lens section and the second lens section as references, the position of the first lens section in the XY direction is corrected.

[0173] It is worth mentioning that the relationship between these lens parts of the optical lens 20 is as follows: (1) the gap in the Z direction mainly affects the field curvature of the optical lens 20; (2) the position in the XY direction mainly affects the peak value of the optical lens 20; (3) the tilt between each lens group mainly affects the tilt and astigmatism of the optical lens 20.

[0174] In some embodiments, the assembly method of the first lens portion 21, the second lens portion 22, and the third lens portion 23 includes: first, calibrating the gap in the Z direction of the second lens portion 21 with the third lens portion 23 as a reference; second, calibrating the gap in the Z direction of the first lens portion 21 with the third lens portion 23 and the second lens portion 22 as references; third, correcting the position in the XY direction of the second lens portion 22 with the third lens portion 23 as a reference; and finally, correcting the position in the XY direction of the first lens portion with the third lens portion 23 and the second lens portion 22 as references.

[0175] Therefore, when designing the optical lens 20, it is necessary to consider the overall optical performance sensitivity of the optical lens 20 in a balanced way. This means avoiding any particular lens or lens group becoming overly sensitive due to the relationship between these lens groups, which could lead to a decrease in the overall optical performance of the optical lens 20 due to the high sensitivity of that lens or lens group. However, due to the different functions and optical powers of the lenses, there will inevitably be lens groups with varying sensitivities from low to high. For example, the second lens group 22 has a higher sensitivity than the third lens group 23, and the first lens group 21 has a higher sensitivity than the second lens group 22. Therefore, in the assembly method of this invention, after calibrating the gaps of these lens groups in the Z direction, the positions of these lens groups in the XY direction need to be calibrated sequentially according to their sensitivity from low to high, thus ensuring the overall optical performance of the optical lens 20.

[0176] In the optical lens 20 of this application, in order to facilitate assembly and improve the imaging quality of the optical lens, the first lens section 21 includes a plurality of first lens groups 211, and in one specific embodiment, the number of first lens groups 212 is 5; the second lens section 22 includes at least one second lens group 222, and in one specific embodiment, the number of second lens groups is 1; the third lens section 23 includes a plurality of third lens groups 232, and in one specific embodiment, the number of third lens groups 232 is 2.

[0177] It is worth mentioning that, in order to facilitate the adjustment of the second lens section 22, the second lens section 22 has a clamping part 2221 on its side, which is integrally formed by extending outward along the side of the second lens group 222. There are multiple clamping parts 2221. In a specific embodiment, such as... Figure 11 As shown, there are two clamping parts 2221, which are symmetrically arranged along the second lens group 222 and extend into the space of the clearance groove 3122 formed by the housing 31, so as to adjust the position of the second lens group 222 through the space of the clearance groove 3122 to meet the optical imaging requirements.

[0178] According to another aspect of the present invention, the present invention further provides a method for assembling each lens portion of the optical lens 20 and the driving device 30, wherein the assembly method includes the following steps:

[0179] (A) The housing 31 is provided, wherein the housing 31 has a receiving space and a top opening 3121 and a bottom opening respectively communicating with the receiving space;

[0180] (B) The focusing part 32 and the optical image stabilization part 33 of the second lens part 22 are assembled inside the housing 31 through the bottom opening of the housing 31, so that the second lens part 22 can be movably held in the receiving space of the housing 31 in a manner corresponding to the top opening 3121 of the housing 31; and

[0181] (C) The third lens portion 23 is fixedly disposed on the base 34 through the bottom opening of the housing 31 and attached to the first lens portion 21 on the housing 31 to obtain the optical lens 20, wherein the first lens portion 21, the second lens portion 22 and the third lens portion 23 are arranged sequentially along the optical axis of the optical lens 20.

[0182] In one specific embodiment, in step (C), firstly, the first lens portion 21 is pre-fixed to the housing 31; secondly, the first lens portion 21, the second lens portion 22, and the third lens portion 23 are calibrated; and thirdly, the first lens portion 21 and the housing 31 are fixed.

[0183] In one specific embodiment, in step (B), when the focusing part 32 of the driving device 30 is equipped with the second lens part 22, i.e., when it is a single lens, the upper surface of the focusing carrier 321 is higher than the upper surface of the optical image stabilization carrier 331. The second lens part 22 is inserted through the position of the clearance groove 313 reserved on the driving device housing 31. The second lens part 22 is inserted into the focusing carrier 321 for pre-assembly through the space reserved in the clearance groove 313.

[0184] Preferably, in step (C), the focusing unit carrier 321 of the focusing unit 32 of the driving device 50 surrounds the outside of the third lens unit 23. This avoids the position of the third lens unit 23 on the base, which helps to reserve space for the second lens unit 23 to move. This ensures that the third lens unit 23 is fixedly connected, while also helping to reduce the height of the optical lens 20, thereby reducing the height of the optical assembly.

[0185] According to the above steps, the optical lens 20 is pre-assembled. After the optical system is tested for imaging capability, the first lens part 21 and the third lens part 23 are fixedly connected to the driving device 30 through a fixing medium, which can be glue or other adhesive chemical substances. Next, the second lens part 22, i.e., the second lens group 22, is moved. The direction of the movement is multiple degrees of freedom, such as rotation, translation, and tilting in the X / Y / Z directions. When the optical lens 20 formed by the second lens group 222, the first lens part 21, and the third lens part 23 can meet the imaging requirements, the second lens group 222 can be fixed.

[0186] During the movement of the second lens unit 22, the adjustment is mainly made by the clearance groove 3122 reserved on the drive device housing 31. That is, the clearance groove 3122 is provided with a clamping device. The clamping device clamps the second lens group 222 and adjusts it in different directions. When the second lens group 222 meets the imaging requirements parameters with the first lens unit 21 and the third lens unit 23, the second lens group 222 can be fixed so that it forms an imaging optical lens 20 with the first lens unit 21 and the third lens unit 23.

[0187] Furthermore, a horizontal mounting surface of the drive device housing 31 is provided on the upper surface of the drive device base 34. The third lens part 23 is fixed inside the third lens mounting hole 355 reserved in the drive device base 34 and is fixed to the drive device base 34. The focusing part 32 and the optical image stabilization part 33 of the drive device 30 are again set on the upper surface of the third lens part 23. They are accommodated inside the housing using the receiving space 313 on the housing. The opening 3121 on the housing is consistent with the light-transmitting hole on the focusing part carrier 321 and the mounting hole of the third lens part 23. Then, the second lens part 22 and the first lens part 21 are pre-assembled by the clamping device. That is, the second lens part 22 is photographed on the focusing part carrier 321 through the clearance groove 3122 reserved on its motor housing 31, and the first lens part 21 is set on the opening 3122 of the drive device housing 31. After calibration and imaging, each group of lenses is fixed.

[0188] Furthermore, such as Figure 12 As shown, the second lens portion 22 is mounted in the carrier of the focusing portion 32, wherein the clamping portion 2221 on the side of the second lens portion 22 extends into the clearance groove 3122 reserved on the housing 31. The position of the second lens portion 22 is adjusted accordingly using the space reserved in the clearance groove 3122. Once its position meets the imaging requirements, it is fixed to the focusing portion carrier 321 by processes such as adhesive application.

[0189] The assembly method of the optical lens 20 and the driving device 30 provided in this application involves simultaneously adjusting the positions of the first lens section 21 and the second lens section 22, with the third lens section 23 fixed along its optical axis as a reference. Based on the sensitivity of the optical lenses, the first lens section 21, which has higher sensitivity, is first fixed to the housing 31 of the driving device 30. Then, the position of the second optical lens section 22, which has lower sensitivity, is adjusted. Finally, after the second lens section 22 can clearly form an image, it is fixed to the focusing carrier 321 of the driving device 30, thus forming the optical component described in this application. This assembly method simplifies the assembly process while ensuring the accuracy of the assembled optical component.

[0190] The basic principles, main features, and advantages of this invention have been described above. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made without departing from the spirit and scope of the invention, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection claimed by this invention is defined by the appended claims and their equivalents.

Claims

1. A method for assembling an optical component, characterized in that, include: (a) An optical lens is provided, the optical lens comprising a first lens portion, a second lens portion and a third lens portion arranged sequentially from the object side to the image side along the optical axis; (b) The third lens portion is fixedly disposed with the fixing portion of the optical assembly; (c) Pre-position the first lens section along the optical axis of the third lens section; (d) Assemble and calibrate the first lens section, the second lens section and the third lens section to form an optical lens with clear imaging; (e) Fix the first lens portion to the fixed portion, and fix the second lens portion to the movable portion of the optical assembly; Step (e) includes: Fix the first lens portion and the fixing portion; The second lens unit can be adjusted in multiple degrees of freedom relative to the fixedly connected first lens unit and the third lens unit; Once the optical lens formed by the second lens portion, the first lens portion, and the third lens portion can meet the imaging requirements, the second lens portion and the movable portion are fixed.

2. The assembly method according to claim 1, characterized in that, In step (d), assembling and calibrating the first lens unit, the second lens unit, and the third lens unit includes: Using the third lens section as a reference, calibrate the gap of the second lens section in the Z direction; Using the third lens section and the second lens section as a reference, the gap in the Z direction of the first lens section is corrected; Using the third lens section as a reference, the position of the second lens section in the XY direction is corrected; Using the third lens section and the second lens section as references, the position of the first lens section in the XY direction is corrected.

3. The assembly method according to claim 2, characterized in that, In step (b), the fixing part includes a base, the base includes a base body and a support part, and a ring structure extends downward from the peripheral area of ​​the base body to form the support part. The support part and the base body form a mounting position, and the third lens part is fixed in the mounting position.

4. The assembly method according to claim 3, characterized in that, The fixing part also includes a housing, which includes a main body and a supporting part. The main body is hollow and annular, and the upper end near the object side extends inward to form the supporting part.

5. The assembly method according to claim 4, characterized in that, In step (c), the first lens portion is held above the second lens portion by the support portion that is pre-assembled on the housing.

6. The assembly method according to claim 5, characterized in that, The movable part includes an optical image stabilization unit, and the second lens part is pre-assembled into the movable part. The optical image stabilization unit drives the second lens part to move relative to the first lens part and the third lens part in a direction perpendicular to the optical axis.

7. The assembly method according to claim 6, characterized in that, The main body and the supporting part constitute a receiving space, and the second lens part is disposed in the receiving space and moves along a direction perpendicular to the optical axis within the receiving space.

8. The assembly method according to claim 7, characterized in that, The housing has a relief groove for clamping and adjusting the second lens portion.

9. The assembly method according to claim 8, characterized in that, The second lens portion includes a clamping portion that extends integrally outward along the side of the second lens portion and into the space of the clearance groove formed by the housing, so as to adjust the position of the second lens portion by clamping the clamping portion through the clearance groove.

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