Lens driving device, camera module and electronic equipment

Abstract

This invention relates to the field of optical lenses, providing a lens driving device, a camera module, and an electronic device. The lens driving device includes: a base, a ball component, a guide component, a first coil assembly, a first magnet assembly, and a movable frame; the base provides a first support surface; the movable frame is located on the top side of the first support surface, and the first magnet assembly contacts the movable frame; the first coil assembly, when energized, drives a first magnet and a second magnet, causing the movable frame to move the lens perpendicular to the optical axis; the optical axis is perpendicular to the first support surface; the ball component is located between the movable frame and the first support surface, reducing friction when the movable frame moves relative to the first support surface; the guide component has a first end and a second end, the first end being slidably connected to the movable frame, and the second end being slidably connected to the base, allowing the movable frame to move smoothly in a direction parallel to the first support surface. This lens driving device improves the stability and guiding accuracy of ball-type image stabilization structures.

Description

Technical Field

[0001] This invention relates to the field of optical lenses, and more particularly to a lens driving device, a camera module, and an electronic device. Background Technology

[0002] With advancements in hardware technology for image processing and increasing user demands for image capture, there is a need to implement optical image stabilization (OIS) functionality in electronic devices and camera modules installed in mobile terminals. To enhance the driving force on the lens, related technologies typically insert ball bearings between the mover and stator assemblies of the drive device to maintain a constant and appropriate distance between them. Friction is minimized through the rotational movement of the ball bearings and point contact with the lens, resulting in smoother and more precise carrier movement and achieving image stabilization. However, the lens drive devices in these technologies are structurally complex, and ball bearing image stabilization structures suffer from stability and low guiding accuracy issues, such as optical axis crosstalk, tilting, or rotation. These ball bearing image stabilization structures place high demands on both hardware and software control. Therefore, there is an urgent need for a lens drive device, camera module, and electronic equipment to address these problems. Summary of the Invention

[0003] The purpose of this invention is to provide a lens driving device, a camera module, and an electronic device, wherein the lens driving device is used to improve the stability and guiding accuracy of a ball-type image stabilization structure.

[0004] In a first aspect, the present invention provides a lens driving device, comprising a base, a ball component, a first coil assembly, a first magnet assembly, a guide member, and a movable frame; the base serves to provide a first support surface; the first coil assembly is located outside the base, and the first magnet assembly is located inside the base; the movable frame is located on the top side of the first support surface, and the first magnet assembly is in contact with the movable frame; when energized, the first coil assembly drives the first magnet assembly to cause the movable frame to move the lens perpendicular to the optical axis direction; the optical axis direction is perpendicular to the first support surface; the ball component is located between the movable frame and the first support surface to reduce the frictional force when the movable frame moves relative to the first support surface; the guide member has a first end and a second end opposite to each other, the first end being slidably connected to the movable frame, and the second end being slidably connected to the base, so that the movable frame and / or the guide member move smoothly in a direction parallel to the first support surface.

[0005] Optionally, the end face of the movable frame facing the first support surface is provided with a support groove for accommodating the ball component; the support groove includes a second support surface parallel to the first support surface; the opposite ends of each ball component respectively roll in contact with the first support surface and the second support surface.

[0006] Optionally, the base includes a first support plate for providing the first support surface; the movable frame includes a second support plate for providing the second support surface; and the ball component is located between the first support plate and the second support plate.

[0007] Optionally, the guide includes a connecting rod, a first guide post, and a second guide post; the first guide post and the second guide post are respectively fixed to both sides of the connecting rod; the base includes a first guide groove, and the moving frame includes a second guide groove; the first guide post is used to slide along a first direction to connect to the first guide groove, and the second guide post is used to slide along a second direction to connect to the second guide groove; the optical axis direction, the first direction, and the second direction are mutually perpendicular.

[0008] Optionally, the first magnet assembly includes a first magnet and a second magnet; the first coil assembly includes a first coil and a second coil; the second-direction reverse end of the moving frame is fixedly connected to the first magnet, and the first-direction reverse end of the moving frame is fixedly connected to the second magnet; the second-direction reverse end of the base is fixedly connected to the first coil, and the first-direction reverse end of the base is fixedly connected to the second coil; when the first coil is energized, it is used to generate a first magnetic field acting on the first magnet, so that the first magnet drives the moving frame and the guide to move in a first direction; when the second coil is energized, it is used to generate a second magnetic field acting on the second magnet, so that the second magnet drives the moving frame to move in a second direction.

[0009] Optionally, the movable frame is provided with a baffle on its periphery; the baffle is used to support or fix the first magnet and the second magnet; when the baffle is made of magnetic material, the baffle that attracts the first magnet is used to shield the second magnetic field, and the baffle that attracts the second magnet is used to shield the first magnetic field.

[0010] Optionally, the base is fixedly connected to a housing; the housing covers the outside of the movable frame; the base or the housing is further provided with a first magnetic sheet and a second magnetic sheet; the first magnetic sheet acts on the first magnet, and the second magnetic sheet acts on the second magnet, so that the first magnet and the second magnet drive the movable frame to rest against the ball component.

[0011] Optionally, the movable frame is provided with a carrier; the carrier is used to load the lens; the carrier is fixedly connected to a third magnet, and the movable frame is fixed with a third coil; when the third coil is energized, it is used to generate a third magnetic field acting on the third magnet, so that the third magnet drives the carrier and the lens to move along the optical axis.

[0012] Optionally, a limiting frame is provided on the periphery of the moving frame; the hardness of the limiting frame is greater than that of the moving frame; the limiting frame is used to limit the maximum displacement of the carrier in the optical axis direction; a limiting buffer is provided between the limiting frame and the moving frame, and the limiting buffer is used to buffer the impact force of the carrier on the limiting frame.

[0013] Optionally, the movable frame is provided with a sliding shaft that extends along the optical axis; the carrier is provided with a sliding groove corresponding to the sliding shaft, and the sliding shaft is slidably connected to the sliding groove.

[0014] Optionally, the movable frame is provided with a third magnetic sheet corresponding to the third magnet; the third magnetic sheet acts on the third magnet so that the third magnet drives the slide groove to rest against the slide shaft.

[0015] In a second aspect, the present invention provides a camera module, including the lens driving device described in the first aspect, and further including a flexible circuit board and an image sensor; the flexible circuit board is used to connect a first coil assembly in the movable frame; the image sensor is fixed to the base, and the center of the image sensor and the center of the lens are located on the same optical axis.

[0016] Thirdly, the present invention provides an electronic device including the lens driving device described in any one of the first aspects, and further including a processor, the processor being used to control the energizing state of the first coil assembly; the energizing state including current magnitude and current direction.

[0017] The beneficial effects of this invention are as follows: By optimizing the design of the ball component and the guide component, the number of parts in the lens drive device is reduced, making the overall structure more compact and lightweight. The guide component provides guidance parallel to the first support surface, ensuring greater stability of the moving frame during movement and reducing optical axis crosstalk, tilting, and rotation phenomena. The low-friction design of the ball component and the precise guidance of the guide component ensure that the moving frame moves more accurately along the predetermined path, improving focusing and image stabilization accuracy. The simplification and optimization of the structure reduce potential failure points and improve the reliability and durability of the lens drive device. Attached Figure Description

[0018] Figure 1 This is an exploded structural diagram of a lens driving device provided by the present invention; Figure 2A schematic diagram of the structure of a base provided by the present invention; Figure 3 A schematic diagram of the installation structure of the base, guide, and movable frame from a first perspective provided by the present invention; Figure 4 This is a schematic diagram of a ball mounting component installed in a support groove according to the present invention; Figure 5 A schematic diagram of the installation structure of the base, guide, and moving frame from a second perspective provided by the present invention; Figure 6 A partial perspective view of a movable frame with a support groove provided by the present invention; Figure 7 A schematic diagram of the structure of a carrier provided by the present invention; Figure 8 A schematic diagram of the structure of a camera module from a perspective parallel to the optical axis provided by the present invention; Figure 9 This is a schematic diagram of the structure of an electronic device provided by the present invention.

[0019] Explanation of the reference numerals in the figure: 1. Base; 2. Ball component; 3. Guide component; 4. Moving frame; 5. Carrier; 6. Camera module; 10. First coil assembly; 101. First support surface; 102. First guide groove; 103. First support piece; 104. First coil; 105. Second coil; 106. Housing; 107. First magnetic piece; 108. Second magnetic piece; 30. First magnet assembly; 301. First magnet; 302. Second magnet; 303. Connecting rod; 304. First guide post; 305. Second guide post; 401. Support groove; 402. Second support surface; 403. Second support piece; 404. Second guide groove; 405. First direction reversing end; 406. Second direction reversing end; 407. Baffle; 408. Limiting frame; 409. Limiting buffer piece; 410. Third coil; 411. Sliding shaft; 412. Shell buffer piece; 501. Lens; 502. Third magnet; 503. Slide groove; 505. Third magnetic sheet; 601. Flexible circuit board; 602. Image sensor; 20. Electronic equipment; 21. Processor; 22. Memory; 23. Output interface; 24. Communication interface; 25. Antenna. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art. The terms "comprising" and similar expressions used herein mean that the element or object preceding the word covers the element or object listed following the word and its equivalents, but do not exclude other elements or objects.

[0021] In response to the problems existing in the current technology, such as Figure 1 and Figure 2 As shown, the first embodiment of the present invention provides a lens driving device, including: a base 1, a ball component 2, a first coil assembly 10, a first magnet assembly 30, a guide 3, and a moving frame 4; the base 1 is used to provide a first support surface 101; the first coil assembly 10 is located outside the base 1, and the first magnet assembly 30 is located inside the base 1; the moving frame 4 is located on the top side of the first support surface 101, and the first magnet assembly 30 is in contact with the moving frame 4; when the first coil assembly is energized, it is used to drive the first magnet assembly 30, so that the moving frame 4 drives the lens 501 to move perpendicular to the optical axis direction; the optical axis direction is perpendicular to the first support surface 101; the ball component 2 is located between the moving frame 4 and the first support surface 101, and is used to reduce the frictional force when the moving frame 4 moves relative to the first support surface 101; the guide 3 has a first end and a second end opposite to each other, the first end is slidably connected to the moving frame 4, and the second end is slidably connected to the base 1, so that the moving frame 4 and / or the guide 3 move smoothly in a direction parallel to the first support surface 101.

[0022] In some specific embodiments, the first magnet assembly 30 includes a first magnet 301 and a second magnet 302; both the first magnet 301 and the second magnet 302 are configured as magnets. The first coil 104 and the second coil 105 are both configured as single-turn coils.

[0023] In other specific embodiments, both the first magnet 301 and the second magnet 302 are configured as electromagnets or made of soft magnetic material. The first coil assembly 10 includes a first coil 104 and a second coil 105; both the first coil 104 and the second coil 105 are configured as multi-turn coils. The multi-turn coils can be configured as coaxial multi-turn coils or parallel-axis multi-turn coils.

[0024] In some specific embodiments, when the first magnet 301 drives the moving frame 4 to move in the second direction, the moving frame 4 slides relative to the guide member 3; when the second magnet 302 drives the moving frame 4 to move in the first direction, the moving frame drives the guide member 3 to move relative to the base 1.

[0025] It is worth noting that the winding axes of the first coil 104 and the second coil 105 are perpendicular to each other, so that the axial magnetic field of the first coil 104 is perpendicular to the axial magnetic field of the second coil 105, thereby making the direction of the force exerted by the first coil 104 on the first magnet 301 orthogonal to the direction of the force exerted by the second coil 105 on the second magnet 302. This embodiment can reduce the electromagnetic coupling between the first coil 104 and the second coil 105, thereby reducing interference and making the image stabilization function of the lens 501 driving device more stable in all directions.

[0026] like Figure 3 As shown, in some embodiments, the end face of the movable frame 4 facing the first support surface 101 is provided with a support groove 401 for accommodating the ball member 2. For example... Figure 4 As shown, the support groove 401 includes a second support surface 402 parallel to the first support surface 101; each ball component 2 rolls in contact with the first support surface 101 and the second support surface 402 at its opposite ends, and the ball component 2 is at least one ball.

[0027] In some specific embodiments, the support groove 401 is cylindrical, and the first support surface 101 and the second support surface 402 are the two end faces of the support groove 401. When the ball component 2 contacts the second support surface 402, there is a gap between the circumferential surface of the support groove 401 and the ball component 2. This embodiment, by setting the support groove 401 to accommodate the ball component 2, achieves the limitation of the ball component 2, and at the same time, can minimize the friction area between the support groove 401 and the ball component 2, which is beneficial to ensure that the ball component 2 plays a role in reducing friction. When the ball component 2 is composed of multiple balls, the rolling contact area between the ball component 2 and the first support surface 101 and the second support surface 402 can be increased. When the device is subjected to external impact, the damage or deformation of the rolling plane caused by the impact of the ball component 2 on the first support surface 101 and the second support surface 402 can be reduced, thus reducing the impact on the driving performance and improving structural reliability and driving smoothness. It is worth noting that the support groove 401 can also be configured as a polygonal prism or an elliptical cylinder.

[0028] In some embodiments, the base 1 includes a first support piece 103 for providing the first support surface 101; the movable frame 4 includes a second support piece 403 for providing the second support surface 402; and the ball member 2 is located between the first support piece 103 and the second support piece 403.

[0029] In some specific embodiments, both the first support plate 103 and the second support plate 403 are made of metal or ceramic. The ball component 2 is made of metal or ceramic. The moving frame 4 and the base 1 are both made of plastic. This embodiment uses higher-strength metal or ceramic materials for the friction points of the ball component 2, which helps to improve the impact resistance of the device. The plastic moving frame 4 and base 1 can reduce the overall weight of the device, which helps to improve the anti-shake accuracy.

[0030] like Figure 4 As shown, in some embodiments, the guide member 3 includes a connecting rod 303, a first guide post 304, and a second guide post 305; the first guide post 304 and the second guide post 305 are respectively fixed to both sides of the connecting rod 303. Figure 5 As shown, the base 1 includes a first guide groove 102, and the movable frame 4 includes a second guide groove 404; the first guide post 304 is used to slide along the first direction to connect the first guide groove 102, and the second guide post 305 is used to slide along the second direction to connect the second guide groove 404; the optical axis direction, the first direction, and the second direction are perpendicular to each other.

[0031] In some specific embodiments, the connecting rod 303 is arranged in an "L" shape in the optical axis direction. When there is one first guide post 304, the first guide post 304 has a first long side and a first short side in the optical axis direction, the first long side extends along the first direction, and the first long side slides and rubs against the first guide groove 102. When there is one second guide post 305, the second guide post 305 has a second long side and a second short side in the optical axis direction, the second long side extends along the second direction, and the second long side slides and rubs against the second guide groove 404.

[0032] In other specific embodiments, when the number of the first guide posts 304 is n1, n1 is a positive integer greater than 1, and the first guide posts 304 are arranged along the first direction. When the number of the second guide posts 305 is n2, n2 is a positive integer greater than 1, and the second guide posts 305 are arranged along the second direction.

[0033] It is worth noting that the above embodiments provide different configurations for the first guide post 304 and the second guide post 305 to meet actual needs. To avoid obstructing the structures of the base 1 and the movable frame 4, the connecting rod 303 can also be configured in any shape, as long as it connects the first guide post 304 and the second guide post 305.

[0034] In some embodiments, the second-direction reverse end 406 of the movable frame 4 is fixedly connected to the first magnet 301, and the first-direction reverse end 405 of the movable frame 4 is fixedly connected to the second magnet 302; the second-direction reverse end 406 of the base 1 is fixedly connected to the first coil 104, and the first-direction reverse end 405 of the base 1 is fixedly connected to the second coil 105; the first-direction end of the movable frame 4 is fixedly connected to the first magnet 301, and the second-direction end of the movable frame 4 is fixedly connected to the second magnet 302; the first-direction end of the base 1 is fixedly connected to the first coil 104, and the second-direction end of the base 1 is fixedly connected to the second coil 105; when the first coil 104 is energized, it generates a first magnetic field acting on the first magnet 301, so that the first magnet 301 drives the movable frame 4 and the guide member 3 to move along a first direction; when the second coil 105 is energized, it generates a second magnetic field acting on the second magnet 302, so that the second magnet 302 drives the movable frame 4 to move along a second direction.

[0035] It is worth noting that by setting the first coil 104 and the second coil 105 on the base 1, the number of flexible circuit boards 601 connected to the movable frame 4 can be reduced, which is easier to process and helps to improve the stability of the device.

[0036] In other embodiments, the fixed positions of the first magnet 301 and the first coil group can be interchanged, and the fixed positions of the second magnet 302 and the second coil group can be interchanged.

[0037] like Figure 6 As shown, in some embodiments, the movable frame 4 is provided with a baffle 407 on its periphery; the baffle 407 is used to support or fix the first magnet 301 and the second magnet 302.

[0038] In some specific embodiments, when the baffle 407 is made of a magnetic material, the baffle 407 that attracts the first magnet 301 is used to shield the second magnetic field, and the baffle 407 that attracts the second magnet 302 is used to shield the first magnetic field.

[0039] It is worth noting that when the baffle 407 is made of a magnetic material, it serves to concentrate and block magnetism, increase structural strength, and facilitate the installation of magnets. The first magnet 301 and the second magnet 302 are fixed to the baffle 407 by magnetic attraction. The baffle 407 can be a composite plate, which consists of magnetic and non-magnetic parts; the magnetic parts provide the functions of concentrating and blocking magnetism, and the non-magnetic parts increase the structural strength of the movable frame 4.

[0040] In some embodiments, the base 1 is fixedly connected to a housing 106; the housing 106 covers the outside of the movable frame 4; the base 1 or the housing 106 is also provided with a first magnetic sheet 107 and a second magnetic sheet 108; the first magnetic sheet 107 acts on the first magnet 301, and the second magnetic sheet 108 acts on the second magnet 302, so that the first magnet 301 and the second magnet 302 drive the movable frame 4 to rest against the ball member 2.

[0041] In some specific embodiments, by adjusting the shape, installation position, and angle of the first magnetic sheet 107 and the second magnetic sheet 108, the direction of the resultant force of the magnetic forces provided by the first magnetic sheet 107 and the second magnetic sheet 108 to the first magnet 301 and the second magnet 302 can be adjusted. A triangle is constructed with the centers of the three balls as vertices, and the distance L between the center of the triangle and the direction of the resultant force is defined as follows: the smaller L is, the more balanced the supporting force on the moving frame 4.

[0042] It is worth noting that the first magnetic sheet 107 and the second magnetic sheet 108 can be flat, flat with a central hole, or flat with grooves on the edges.

[0043] In other specific embodiments, under various tilting postures and preset accelerations, the combined force of the magnetic forces provided by the first magnetic sheet 107 and the second magnetic sheet 108 to the first magnet 301 and the second magnet 302 is sufficient to attract the moving frame 4 to the base 1. This embodiment can prevent the moving frame 4 and the ball component 2 from overturning under the action of gravity or inertia, ensuring the impact resistance of the device.

[0044] In some specific embodiments, when the first coil 104 and the second coil 105 are de-energized, the first magnetic sheet 107 and the second magnetic sheet 108 are used to attract the first magnet 301 and the second magnet 302, causing the moving frame 4 to return to the central position of the base 1. This design ensures that the moving frame 4 can automatically reset to the predetermined position without consuming additional power, thereby reducing the overall power consumption of the system. It is suitable for camera lenses that require frequent resets. By using magnetic force to achieve automatic reset, not only can energy consumption be reduced, but the response speed and stability of the system can also be improved.

[0045] In some embodiments, the movable frame 4 is provided with a carrier 5; the carrier 5 is used to load the lens 501; the carrier 5 is fixedly connected to a third magnet 502, and the movable frame 4 is fixedly provided with a third coil 410; when the third coil 410 is energized, it is used to generate a third magnetic field acting on the third magnet 502, so that the third magnet 502 drives the carrier 5 and the lens 501 to move along the optical axis.

[0046] In some specific embodiments, the third coil is connected to the circuitry on the base 1 via a flexible printed circuit (FPC) with a rocker arm attached. The rocker arm provides the flexible printed circuit board with movable space and support.

[0047] In some specific embodiments, the number of third magnets 502 is one, located on the opposite side of the first magnet 301 or the second magnet 302 relative to the movable frame 4. In other specific embodiments, the number of third magnets 502 is two, respectively located on the opposite side of the first magnet 301 and the second magnet 302 relative to the movable frame 4.

[0048] In some embodiments, a limiting frame 408 is provided on the periphery of the movable frame 4; the hardness of the limiting frame 408 is greater than the hardness of the movable frame 4; the limiting frame 408 is used to limit the maximum displacement of the carrier 5 in the optical axis direction; a limiting buffer piece 409 is provided between the limiting frame 408 and the movable frame 4, and the limiting buffer piece is used to buffer the impact force of the carrier 5 on the limiting frame 408.

[0049] It is worth noting that in this embodiment, the limiting frame 408 ensures that the carrier 5 is impacted and limited in an independent internal space, unaffected by the moving frame 4, thus improving structural reliability. In some specific embodiments, a shell buffer sheet 412 is also provided inside the outer shell 106, which is used to buffer the impact force of the limiting frame 408 on the outer shell 106.

[0050] like Figure 6 As shown, in some embodiments, the movable frame 4 is provided with a sliding shaft 411, which extends along the optical axis direction. For example... Figure 7 As shown, the carrier 5 is provided with a sliding groove 503 corresponding to the sliding shaft 411, and the sliding shaft 411 is slidably connected to the sliding groove 503.

[0051] In some specific embodiments, the sliding shaft 411 is configured as a column and is fixedly connected to the movable frame 4. The dimension of the sliding groove 503 in the optical axis direction is smaller than the dimension of the sliding shaft 411 in the optical axis direction. In this embodiment, when the sliding groove 503 moves in contact with the sliding shaft 411, the carrier 5 moves relative to the movable frame 4 along the optical axis direction.

[0052] In this embodiment, the sliding shaft 411 and the sliding groove 503 are used to stably guide the carrier 5, preventing the carrier 5 from deviating from the optical axis when it moves, which is beneficial to stabilizing the focus center.

[0053] In some embodiments, the movable frame 4 is provided with a third magnetic sheet 505 corresponding to the third magnet 502; the third magnetic sheet 505 acts on the third magnet 502 so that the third magnet 502 drives the slide groove 503 to rest against the slide shaft 411.

[0054] In some specific embodiments, the third magnetic sheet 505 is used to attract the third magnet 502 when the third coil 410 is de-energized, so that the carrier 5 drives the lens 501 to stop in a default position, which is a near-focal, medium-focal, or far-focal position. It is worth noting that the default position can be adjusted according to user needs, including adjusting the shape, installation position, and installation angle of the third magnetic sheet 505.

[0055] like Figure 8 As shown, the second embodiment provides a camera module 6, including the lens 501 driving device described in the above embodiments, and also includes a flexible circuit board 601 and an image sensor 602. Please refer to... Figure 6 and Figure 8 The flexible circuit board 601 is used to connect the first coil assembly in the movable frame 4; the image sensor 602 is fixed to the base 1, and the center of the image sensor 602 and the center of the lens 501 are located on the same optical axis, which is along the direction of the optical axis. In some specific embodiments, the image sensor 602 is a complementary metal-oxide-semiconductor or a charge-coupled device.

[0056] like Figure 9 As shown, the third embodiment provides an electronic device 20, including the lens 501 driving device described in any of the above embodiments, and further including a processor 21, the processor 21 being used to control the energizing state of the first coil assembly 10; the energizing state includes the magnitude and direction of the current. In one possible embodiment, the electronic device 20 further includes: an output interface 23 for outputting results; a communication interface 24 for transmitting communication signals; and an antenna 25 for transmitting or receiving signals.

[0057] It should be noted that the processor 21 in this embodiment can be an image processing chip or an integrated circuit chip, capable of processing image signals. In implementation, each step of the above method embodiment can be completed by the integrated logic circuitry in the processor's hardware or by instructions in software form. The processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices. It can implement or execute the steps disclosed in this embodiment. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this embodiment can be directly implemented by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method.

[0058] It is understood that the memory 22 in this embodiment can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which serves as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced Synchronous DRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0059] While embodiments of the present invention have been described in detail above, it will be apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations fall within the scope and spirit of the invention as set forth in the claims. Furthermore, the invention described herein may have other embodiments and can be implemented or carried out in various ways.

Claims

1. A lens driving device, characterized in that, include: Base, ball component, first coil assembly, first magnet assembly, guide component, and movable frame; The base is used to provide a first support surface; The first coil assembly is located on the outside of the base, and the first magnet assembly is located on the inside of the base; The movable frame is located on the top side of the first support surface, and the first magnet assembly is in contact with the movable frame; when the first coil assembly is energized, it drives the first magnet assembly so that the movable frame drives the lens to move perpendicular to the optical axis direction; the optical axis direction is perpendicular to the first support surface; The ball component is located between the movable frame and the first support surface, and is used to reduce the frictional force when the movable frame moves relative to the first support surface; The guide has a first end and a second end, the first end being slidably connected to the movable frame and the second end being slidably connected to the base, so that the movable frame and / or the guide can move smoothly in a direction parallel to the first support surface.

2. The apparatus according to claim 1, characterized in that, The movable frame has a support groove on its end face facing the first support surface for accommodating the ball component; the support groove includes a second support surface parallel to the first support surface; the opposite ends of each ball component respectively roll in contact with the first support surface and the second support surface.

3. The apparatus according to claim 2, characterized in that, The base includes a first support plate for providing the first support surface; the movable frame includes a second support plate for providing the second support surface; the ball component is located between the first support plate and the second support plate.

4. The apparatus according to claim 1, characterized in that, The guide component includes a connecting rod, a first guide post, and a second guide post; the first guide post and the second guide post are respectively fixed to both sides of the connecting rod; The base includes a first guide groove, and the movable frame includes a second guide groove; The first guide post is used to slide and connect to the first guide groove along a first direction, and the second guide post is used to slide and connect to the second guide groove along a second direction; The optical axis direction, the first direction, and the second direction are all perpendicular to each other.

5. The apparatus according to claim 4, characterized in that, The first magnet assembly includes a first magnet and a second magnet; the first coil assembly includes a first coil and a second coil; The second reverse end of the movable frame is fixedly connected to the first magnet, and the first reverse end of the movable frame is fixedly connected to the second magnet. The second reverse end of the base is fixedly connected to the first coil, and the first reverse end of the base is fixedly connected to the second coil. When the first coil is energized, it generates a first magnetic field acting on the first magnet, so that the first magnet drives the moving frame and the guide to move along a first direction; When the second coil is energized, it generates a second magnetic field that acts on the second magnet, so that the second magnet drives the moving frame to move in a second direction.

6. The apparatus according to claim 5, characterized in that, The movable frame is provided with a baffle on its periphery; the baffle is used to support or fix the first magnet and the second magnet. When the baffle is made of magnetic material, the baffle that attracts the first magnet is used to shield the second magnetic field, and the baffle that attracts the second magnet is used to shield the first magnetic field.

7. The apparatus according to claim 5, characterized in that, The base is fixedly connected to the outer shell; The outer shell covers the outside of the movable frame; The base or the outer casing is further provided with a first magnetic sheet and a second magnetic sheet; The first magnetic sheet acts on the first magnet, and the second magnetic sheet acts on the second magnet, so that the first magnet and the second magnet drive the moving frame to rest against the ball component.

8. The apparatus according to claim 1 or 5, characterized in that, The movable frame contains a carrier; The carrier is used to mount the lens; a third magnet is fixedly connected to the carrier, and a third coil is fixedly attached to the movable frame; When the third coil is energized, it generates a third magnetic field that acts on the third magnet, so that the third magnet drives the carrier and the lens to move along the optical axis.

9. The apparatus according to claim 8, characterized in that, The movable frame is provided with a limiting frame on its periphery; The rigidity of the limiting frame is greater than that of the moving frame; the limiting frame is used to limit the maximum displacement of the carrier in the optical axis direction. A limiting buffer plate is provided between the limiting frame and the moving frame, and the limiting buffer plate is used to buffer the impact force of the carrier on the limiting frame.

10. The apparatus according to claim 8, characterized in that, The movable frame is provided with a sliding shaft that extends along the optical axis; the carrier is provided with a sliding groove corresponding to the sliding shaft, and the sliding shaft is slidably connected to the sliding groove.

11. The apparatus according to claim 10, characterized in that, The movable frame is provided with a third magnetic sheet corresponding to the third magnet; the third magnetic sheet acts on the third magnet so that the third magnet drives the slide groove to rest against the slide shaft.

12. A camera module, comprising the lens driving device according to any one of claims 1 to 11, characterized in that, It also includes a flexible circuit board and an image sensor; the flexible circuit board is used to connect the first coil assembly in the movable frame; the image sensor is fixed to the base, and the center of the image sensor and the center of the lens are located on the same optical axis.

13. An electronic device comprising the lens driving device according to any one of claims 1 to 11, characterized in that, It also includes a processor for controlling the energizing state of the first coil assembly; the energizing state includes the magnitude and direction of the current.

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