Camera modules and electronic equipment

Abstract

The present application discloses a camera module and an electronic device, wherein the camera module includes: a lens seat assembly; a lens assembly, which is arranged on one side of the lens seat assembly; a magnetorheological elastomer structure, which is arranged between the lens assembly and the lens seat assembly, and the magnetorheological elastomer structure includes at least one sealed cavity, the sealed cavity is filled with magnetic fluid, and the wall surface of one end of the sealed cavity close to the lens assembly is an elastic surface; an electromagnetic coil, which is arranged corresponding to the elastic surface; wherein, after the electromagnetic coil is energized, the elastic surface is deformed. In the technical solution of the present application, by arranging the magnetorheological elastomer structure between the lens assembly and the lens seat assembly, under the action of the magnetorheological elastomer structure, the characteristics of the magnetic fluid are utilized to achieve anti-shake and focusing effects without occupying much space.

Description

Technical Field

[0001] The present application belongs to the technical field of folding devices, and specifically relates to a camera module and an electronic device. Background Art

[0002] At present, existing mobile phones usually move during the process of taking pictures, and the pictures taken by ordinary mobile phones during the process of moving will be blurred. In the existing technology, an anti-shake structure is added to the camera part of the mobile phone, thereby adding an anti-shake function to the module or sensor to improve the shooting effect of the mobile phone. However, the anti-shake technology in the existing technology usually uses the electromagnetic force of magnets and coils to drive, and the volume of the entire module is large and the internal structure is also relatively complex. Summary of the invention

[0003] The present application aims to provide a camera module and an electronic device, which achieves anti-shake and focusing effects without occupying much space by setting a magnetorheological elastomer structure between a lens assembly and a lens holder assembly and utilizing the characteristics of magnetic fluid under the action of the magnetorheological elastomer structure.

[0004] In order to achieve the above-mentioned purpose, the camera module provided in the embodiment of the first aspect of the present application includes: a lens holder assembly; a lens assembly, which is arranged on one side of the lens holder assembly; a magnetorheological elastomer structure, which is arranged between the lens assembly and the lens holder assembly, and the magnetorheological elastomer structure includes at least one sealed cavity, the sealed cavity is filled with magnetic fluid, and the wall surface of one end of the sealed cavity close to the lens assembly is an elastic surface; an electromagnetic coil, which is arranged corresponding to the elastic surface; wherein, when the electromagnetic coil is energized, the elastic surface is deformed.

[0005] According to the embodiment of the camera module provided by the present application, it mainly includes a lens seat assembly, a lens assembly and a magnetorheological elastomer structure. The three structures are arranged in layers. When the entire camera module moves, especially when it shakes, the magnetorheological elastomer structure will stabilize the lens assembly. Specifically, a magnetorheological elastomer structure is arranged between the lens assembly and the lens seat assembly. The magnetorheological elastomer structure will control the movement of the internal magnetic fluid when it shakes, so that the sealed cavity as a whole is deformed. Under the action of the deformation, since the lens assembly and the magnetorheological elastomer structure are in contact with each other, the local part of the lens assembly can also change with the movement, which can improve the effect of shooting stability and greatly improve the shooting effect. In addition, if all the sealed cavities are deformed together, when the deformation direction is the same, the lens assembly can be driven to translate, and the focusing function can be realized.

[0006] Among them, one or more sealed cavities are arranged in the magnetorheological elastomer structure, and an electromagnetic coil is arranged at a position corresponding to each sealed cavity, and a magnetic fluid is filled in the sealed cavity. After the electromagnetic coil is energized, a magnetic field corresponding to the sealed cavity is generated, and the magnetic fluid will change with the presence or absence of the magnetic field under its own characteristics. When the magnetic fluid changes, the entire sealed cavity will also change accordingly, thereby causing the sealed cavity to deform. Specifically, after the electromagnetic coil is energized, the end face of the sealed cavity itself facing one end of the lens assembly is an elastic surface, and under the condition of the force generated by the magnetic fluid, the elastic surface will produce corresponding deformation. Further, all surfaces of the sealed cavity are elastic surfaces, but the wall surface facing one end of the lens assembly has greater elasticity and is more prone to deformation. Through the above structural design, an external driving force will be generated on the lens assembly when power is turned on, and it will recover after power is turned off. By utilizing this characteristic, the lens assembly can be displaced under the action of the magnetorheological elastomer structure to achieve stable shooting effect.

[0007] Among them, since the sealed cavity in the magnetorheological elastomer structure is filled with magnetic fluid, the magnetic fluid will move when it is affected by the magnetic field force of the electromagnetic coil. Since only the wall surface at one end close to the lens assembly in the sealed cavity is an elastic surface, when the magnetic fluid moves, it will drive the elastic surface to deform, thereby exerting a certain displacement drive on the lens assembly to achieve the focusing and anti-shake effects.

[0008] Furthermore, in order to ensure the shooting effect, since the magnetorheological elastomer structure itself is located between the lens holder assembly and the lens assembly, a certain light transmittance is required, and its material must take into account both light transmittance and elasticity, and generally polydimethylsiloxane (PDMS) can be selected.

[0009] Of course, the number and positions of the sealed cavities can be flexibly determined according to the specific lens structure, as long as the lens assembly can be moved.

[0010] It should be added that after passing through the lens assembly, the light will pass through the magnetorheological elastomer structure and the lens mount assembly in sequence, and will eventually be received by the image chip, i.e., the image sensor. Therefore, the structures on the light transmission path need to have good light transmittance.

[0011] The electronic device provided in the embodiment of the second aspect of the present application includes: a housing; and a camera module such as any one of the embodiments of the first aspect described above, arranged on the housing.

[0012] According to an embodiment of the electronic device provided in the present application, it mainly includes a shell and a camera module arranged on the shell. The camera module can be arranged on the front side of the shell to shoot objects in front, or can be arranged on the back side of the shell to shoot objects behind. It can even be connected to the shell in a movable manner to realize arbitrary shooting.

[0013] The housing may be a middle frame, a front panel or a rear cover of an electronic device.

[0014] In addition, since the folding device includes the camera module of any of the above embodiments, it has the beneficial effects of any of the above embodiments.

[0015] Among them, electronic devices include mobile phones, tablets, cameras, camcorders, notebooks and other devices with shooting needs.

[0016] Additional aspects and advantages of the present application will become apparent in the following description or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a camera module according to an embodiment of the present application is shown;

[0018] Figure 2 A schematic diagram showing the relationship of the magnetorheological elastomer structure according to an embodiment of the present application is shown;

[0019] Figure 3 A schematic cross-sectional structure diagram of a camera module according to an embodiment of the present application is shown;

[0020] Figure 4 A schematic cross-sectional structure diagram of a camera module according to an embodiment of the present application is shown;

[0021] Figure 5 A schematic diagram of the structure of a magnetic fluid under no magnetic force according to an embodiment of the present application is shown;

[0022] Figure 6 A schematic diagram of a structure in which a magnetic fluid is deformed by a magnetic force according to an embodiment of the present application is shown;

[0023] Figure 7 A schematic structural diagram of an electronic device according to an embodiment of the present application is shown.

[0024] in, Figures 1 to 7 The corresponding relationship between the reference numerals and the component names is as follows:

[0025] 100: camera module; 102: lens holder assembly; 1022: lens holder body; 1024: infrared filter; 104: lens assembly; 106: magnetorheological elastomer structure; 1062: sealed cavity; 1064: electromagnetic coil; 1066: magnetic fluid; 1068: bracket seat body; 1070: first cavity; 1072: cover body; 1074: second cavity; 108: circuit board; 1082: image sensor; 200: electronic device; 202: housing. DETAILED DESCRIPTION

[0026] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0027] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0028] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] The electronic device provided in the embodiments of the present application may be a mobile phone, tablet, camera, camcorder, notebook or other device with shooting requirements.

[0030] Refer to the following Figures 1 to 7 Describe the camera module and electronic device provided according to the embodiments of the present application.

[0031] like Figure 1 and Figure 2As shown, one embodiment of the present application proposes a camera module 100, including: a lens holder assembly 102; a lens assembly 104, which is arranged on one side of the lens holder assembly 102; a magnetorheological elastomer structure 106, which is arranged between the lens assembly 104 and the lens holder assembly 102, and the magnetorheological elastomer structure 106 includes at least one sealed cavity 1062, each sealed cavity 1062 is filled with a magnetic fluid 1066, and the wall surface of one end of the sealed cavity 1062 close to the lens assembly 104 is an elastic surface; an electromagnetic coil 1064, which is arranged corresponding to the elastic surface; wherein, after the electromagnetic coil 1064 is energized, the elastic surface is deformed under the action of the magnetic fluid 1066.

[0032] According to the embodiment of the camera module 100 provided by the present application, it mainly includes a lens holder assembly 102, a lens assembly 104 and a magnetorheological elastomer structure 106. The three structures are arranged in a stacked manner. When the entire camera module 100 moves, especially when it shakes, the magnetorheological elastomer structure 106 can stabilize the lens assembly 104. Specifically, a magnetorheological elastomer structure 106 is arranged between the lens assembly 104 and the lens holder assembly 102. The magnetorheological elastomer structure 106 can control the movement of the magnetic fluid 1066 inside when it shakes, so that the sealed cavity 1062 is deformed as a whole. Under the effect of the deformation, since the lens assembly 104 and the magnetorheological elastomer structure 106 are in close contact, the local part of the lens assembly 104 can also change with the movement, which can improve the effect of shooting stability and greatly improve the shooting effect.

[0033] It should be supplemented that the deformation of the sealed cavity may be in any direction, usually along the optical axis of the lens assembly 104 .

[0034] Among them, one or more sealed cavities 1062 are arranged in the magnetorheological elastomer structure 106, and an electromagnetic coil 1064 is arranged at a position corresponding to each sealed cavity 1062, and a magnetic fluid 1066 is also filled in the sealed cavity. When the electromagnetic coil 1064 is energized, a magnetic field corresponding to the sealed cavity 1062 is generated, and the magnetic fluid 1066 will change with the presence or absence of the magnetic field under its own characteristics. When the magnetic fluid 1066 changes, the sealed cavity 1062 as a whole will also change accordingly, so that the sealed cavity 1062 will be deformed. Specifically, after the electromagnetic coil 1064 is energized, such as Figure 6 As shown in FIG. 1 , the end surface of the sealing cavity 1062 facing the lens assembly is an elastic surface. When receiving the force from the magnetic fluid 1066, the elastic surface will deform. Through the above structural design, an external driving force will be generated on the lens assembly 104 when power is turned on, and when power is turned off, the lens assembly 104 will be deformed. Figure 5 As shown, it will recover. By utilizing this characteristic, the lens assembly 104 can be displaced under the action of the magnetorheological elastomer structure 106 to achieve a stable shooting effect.

[0035] Among them, since the sealed cavity 1062 in the magnetorheological elastomer structure 106 is filled with magnetic fluid, the magnetic fluid will move when it is affected by the magnetic field force of the electromagnetic coil 1064. Since only the wall surface at one end close to the lens assembly in the sealed cavity 1062 is an elastic surface, when the magnetic fluid moves, the elastic surface will be driven to deform, thereby exerting a certain displacement drive on the lens assembly to achieve the focusing and anti-shake effects.

[0036] Furthermore, in order to ensure the shooting effect, since the magnetorheological elastomer structure 106 itself is located between the lens base assembly 102 and the lens assembly 104, a certain light transmittance is required, and its material must take into account both light transmittance and elasticity, and generally polydimethylsiloxane (PDMS) can be selected.

[0037] Of course, the number and position of the sealed cavities 1062 can be flexibly determined according to the specific lens structure, as long as the lens assembly 104 can be moved.

[0038] It should be added that after passing through the lens assembly 104, the light will pass through the magnetorheological elastomer structure 106 and the lens base assembly 102 in sequence, and will eventually be received by the image chip, i.e., the image sensor 1082. Therefore, the structures on the transmission path of the light need to have good light transmittance.

[0039] Those skilled in the art should know that magnetic fluid 1066 is also called ferromagnetic fluid 1066, which is a liquid that is strongly polarized in the presence of a magnetic field. It is composed of nanometer-level ferromagnetic particles suspended in a carrier fluid (usually an organic solvent or water). When there is no external magnetic field, ferromagnetic fluid 1066 is non-magnetic. When there is an external magnetic field, ferromagnetic fluid 1066 will produce strong magnetization. The biggest feature of ferromagnetic fluid 1066 is that when it is in a sufficiently strong vertical magnetic field, a wrinkled morphology will naturally form on its surface. Ferromagnetic fluid 1066 has an abnormally high magnetic susceptibility. A small bar magnet can reach its critical magnetic field and cause it to wrinkle. This deformation characteristic of magnetic fluid 1066 can convert magnetic energy into surface free energy and gravitational energy. When the external magnetic field intensity is higher than the critical magnetic field, this wrinkled morphology will appear. This application utilizes the above-mentioned characteristics of magnetic fluid 1066 to achieve anti-shake or focusing effects by generating deformation.

[0040] Furthermore, if Figure 3 and Figure 4As shown, the magnetorheological elastomer structure 106 specifically includes: a bracket base 1068, in which a plurality of first cavities 1070 are formed; a cover body 1072, which is disposed on one side of the bracket base 1068, and the cover body 1072 is sealed and connected to the bracket base 1068; wherein the first cavity 1070 and the cover body 1072 cooperate to form a sealed cavity 1062.

[0041] The magnetorheological elastomer structure 106 mainly includes a support base 1068 and a cover 1072. A first cavity 1070 is provided in the support base 1068. By covering the cover 1072 on the support base 1068, the first cavity 1070 and the cover 1072 can cooperate to form a sealed cavity 1062, so as to provide a containing space for the magnetic fluid 1066. On this basis, after the electromagnetic coil 1064 is energized, the magnetic fluid 1066 can be deformed in the first cavity 1070, thereby realizing the deformation of the sealed cavity 1062, and then satisfying the driving effect of the lens assembly 104.

[0042] After the cover body 1072 and the bracket base body 1068 are sealed and connected, the cover body 1072 can cover the first cavity 1070, and the gap between the cover body 1072 and the bracket base body 1068 can be sealed, thereby ensuring that the magnetic fluid 1066 will not leak.

[0043] In a specific embodiment, the magnetorheological elastomer structure 106 can be made using PDMS material. Since its initial state is liquid, after adding a certain ratio (usually PDMS: curing agent = 10:1) of curing agent, it can form the required elastic solid with extremely high light transmittance. Therefore, from the perspective of manufacturing technology, it is only necessary to design a mold with a specific structure. The magnetorheological elastomer structure 106 of the above structure can be easily made with this material, and the electromagnetic coil 1064 can also be directly integrated into the bottom layer of the sealed cavity 1062 through the change process of PDMS from liquid to solid, which is convenient for subsequent module assembly.

[0044] It can be understood that in this embodiment, the sealed cavity 1062 is only composed of the first cavity 1070, and there is no structure of the sealed cavity 1062 on the cover body 1072, which only serves as a snap-fit ​​sealing function.

[0045] Furthermore, the elasticity of the portion of the cover body 1072 opposite to the first cavity 1070 is greater than the elasticity of the bracket base 1068 .

[0046] By limiting the elasticity of some structures in the cover body 1072, the elasticity is larger and more prone to deformation. When the electromagnetic coil 1064 is energized, the deformation of the magnetic fluid 1066 will drive the portion of the cover body 1072 opposite to the first cavity 1070 to deform, thereby causing the lens assembly 104 to move relative to the deformed portion, thereby achieving a stable shooting effect.

[0047] It should be noted that the structure of the portion of the cover 1072 opposite to the first cavity 1070 is the wall surface of the sealed cavity 1062 at one end close to the lens assembly 104 .

[0048] Furthermore, if Figure 4 As shown, it also includes: a plurality of second cavities 1074, which are arranged on the cover body 1072, and each second cavity 1074 is arranged opposite to the first cavity 1070; wherein the elasticity of the bottom of the second cavity 1074 is greater than the elasticity of the bracket seat 1068.

[0049] By arranging the second cavity 1074 on the cover 1072, when the cover 1072 and the bracket seat 1068 are connected, the second cavity 1074 and the first cavity 1070 are arranged relative to each other, so that the second cavity 1074 and the first cavity 1070 are arranged opposite to each other, which is more convenient for positioning and connection. In addition, since the second cavity 1074 is arranged on the cover 1072, by limiting the elasticity of the bottom of the hole of the second cavity 1074 so that its elasticity is greater than the elasticity of the bracket seat 1068, the bottom of the hole of the second cavity 1074 will be deformed, so that after the electromagnetic coil 1064 is energized, the deformation of the magnetic fluid 1066 will drive the bottom of the hole of the cover 1072 and the second cavity 1074 to deform together, and then the lens assembly 104 relative to the deformed part will also move accordingly, so as to achieve a stable shooting effect.

[0050] It can be understood that, compared with a structure in which only the first cavity 1070 is provided, by additionally providing the second cavity 1074 on the cover body 1072 , the volume of the sealed cavity 1062 can be increased while ensuring the same cross-sectional area.

[0051] Furthermore, the plurality of sealed cavities 1062 are arranged in a circular array around the optical axis of the lens assembly 104; or the plurality of sealed cavities 1062 are arranged in a matrix array.

[0052] By setting a plurality of sealed cavities 1062 in the magnetorheological elastomer structure 106, the plurality of sealed cavities 1062 can be arranged in a circular array, that is, arranged around the optical axis of the lens assembly 104, so as to be more easily adapted to different displacement conditions of the camera module 100. It can be understood that the more sealed cavities 1062 there are, the more targeted control of the electromagnetic coils 1064 in a few specific sealed cavities 1062 can be performed when displacement occurs, thereby achieving a precise anti-shake effect. Similarly, the plurality of sealed cavities 1062 can also be arranged in a matrix array according to the specific shape of the lens holder assembly 102 or the lens assembly 104, and the matrix arrangement can also improve the anti-shake effect.

[0053] Furthermore, it includes: a circuit board 108 , on which an image sensor 1082 is disposed, the image sensor 1082 is disposed opposite to the lens assembly 104 , and the light passes through the lens assembly 104 and then enters the image sensor 1082 through the magnetorheological elastomer structure 106 and the lens holder assembly 102 .

[0054] By setting the circuit board 108, an image sensor 1082 arranged opposite to the lens assembly 104 can be set on the circuit board 108. In addition, control devices for normal operation, such as capacitors and resistors, are set on the circuit board 108. At the same time, connectors connected to external panels are also set to ensure the transmission of information. It should be noted that during the shooting process, after passing through the lens assembly 104, the light will pass through the magnetorheological elastomer structure 106 and the lens holder assembly 102 in sequence, and finally enter the image sensor 1082 for imaging. In order to ensure the imaging effect, when shaking occurs, the magnetorheological elastomer structure 106 can be controlled to deform to adjust the position and posture of the lens assembly 104, so as to facilitate subsequent stable imaging.

[0055] Furthermore, the lens holder assembly 102 specifically includes: a lens holder body 1022 connected to a side of the magnetorheological elastomer structure 106 away from the lens assembly 104 ; and an infrared filter 1024 disposed on the lens holder body 1022 .

[0056] The lens base assembly 102 mainly includes a lens base body 1022 and an infrared filter 1024, wherein the lens base body 1022 mainly serves to connect the magnetorheological elastomer structure 106 and provide fixed support, while the infrared filter 1024 is used to filter infrared wavelength light, thereby reducing the interference of infrared light on the imaging effect and ensuring the imaging quality.

[0057] It should be noted that the infrared filter 1024 is arranged in the optical path and has good light transmittance, but it will filter the light with infrared wavelength, that is, the light of 780nm~14um, and its area is generally larger than the lighting area of ​​the lens assembly 104.

[0058] Furthermore, the magnetorheological elastomer structure 106 is integrally formed.

[0059] In a specific embodiment, the magnetorheological elastomer structure 106 is integrally formed, which can effectively improve the sealing effect. It should be noted that before the integral forming, the electromagnetic coil 1064 needs to be placed in the position corresponding to the sealing cavity 1062 and then processed.

[0060] Furthermore, a magnetorheological elastomer structure protrudes from a wall surface of the sealed cavity close to the lens assembly, and the lens assembly is bonded to the protruding portion of the sealed cavity.

[0061] By limiting the specific shape of the sealing cavity, the protruding magnetorheological elastomer structure is limited, thereby facilitating connection with the lens assembly. Specifically, the connection between the two is bonding, that is, the magnetorheological elastomer structure is glued to the lens assembly by connecting glue, which ensures the connection without increasing the thickness and also makes subsequent assembly more convenient.

[0062] Furthermore, the elasticity of the wall surface at one end of the sealing cavity close to the lens assembly is greater than the elasticity of the wall surface at one end away from the lens assembly; and / or the elasticity of the circumferential wall surface of the sealing cavity 1062 is less than the elasticity of the wall surface at one end of the sealing cavity 1062 close to the lens assembly 104.

[0063] In this embodiment, the elasticity of the wall of the sealed cavity 1062 is limited, specifically, the wall of the sealed cavity at one end close to the lens has greater elasticity, and the wall of the other end has less elasticity, so that when subjected to the same force, the wall facing the lens assembly will deform more greatly, so as to facilitate the movement of the lens assembly. In addition, the elasticity of the circumferential wall is also limited, and its elasticity is limited to be smaller. When the magnetic fluid 1066 is deformed, when the same force is generated, the deformation of the circumferential wall is smaller and less likely to deform, ensuring that the wall of the sealed cavity 1062 at one end close to the lens assembly 104 is deformed first, thereby achieving a bulge in a specific direction, and then facilitating the anti-shake or focus of the entire camera module 100.

[0064] like Figure 7 As shown, the electronic device 200 provided in the embodiment of the second aspect of the present application includes: a housing 202 ; and a camera module 100 as any one of the embodiments of the first aspect described above, which is arranged on the housing 202 .

[0065] According to an embodiment of the electronic device 200 provided in the present application, it mainly includes a shell 202 and a camera module 100 arranged on the shell 202. The camera module 100 can be arranged on the front side of the shell 202 to shoot objects in front, or can be arranged on the back side of the shell 202 to shoot objects behind, and can even be connected to the shell 202 in a movable connection manner to realize arbitrary change of shooting.

[0066] In addition, since the electronic device 200 includes the camera module 100 of any of the above embodiments, it has the beneficial effects of any of the above embodiments.

[0067] In a specific embodiment, a structure for storing magnetic fluid 1066 and causing it to deform is provided, specifically: the magnetic fluid 1066 is sealed in a cavity of elastic film material, the side wall and the bottom of the cavity are made of thicker material and are not easily deformed, and the upper surface of the cavity is made of ultra-thin elastic material and is easy to deform. In the absence of a magnetic field, the film cavity does not deform. When the magnetic field in the vertical direction is increased, the magnetic fluid 1066 in the cavity deforms violently. The upper surface of the cavity is thin and easily deformed, so it protrudes upward, forming an upward driving force. After the magnetic field disappears, the magnetic fluid 1066 recovers under the action of the film elasticity.

[0068] In this specific embodiment, a typical elastic film material is polydimethylsiloxane (PDMS), which is a high molecular organic compound with the characteristics of high light transmittance and high elasticity.

[0069] In a specific embodiment, a camera module 100 is provided, wherein the lens is fixed in a lens barrel (i.e., a lens assembly 104), the lens barrel is arranged above a magnetic fluid annular cavity, and the bottom surface of the lens barrel is in contact with the upper surface of the magnetic fluid annular cavity (i.e., a magnetorheological elastomer structure 106), specifically, the bottom surface is fixed to the protruding surfaces located at the four corners of the upper surface of the magnetic fluid annular cavity by glue. The lower surface of the magnetic fluid annular cavity is connected to a lens seat (i.e., a lens seat assembly 102), and is directly fixed to the upper surface of the lens seat by glue, the lens seat includes an infrared filter 1024, and the image sensor 1082 is located below the lens seat, and the image sensor 1082 is fixed to a PCB board and is electrically connected.

[0070] The force driving the lens barrel comes from the magnetic fluid annular cavity, which is made of elastic material (such as the PDMS material mentioned above). The protruding parts on the four corners of the magnetic fluid annular cavity are correspondingly provided with cavities (i.e., sealed cavities 1062), the interior of the cavities is sealed and filled with magnetic fluid 1066, and the upper surface thickness of the cavities located at the four corners is very thin, which is easy to deform; the side support walls on the four sides of the annular cavity are thick and solid elastic materials, which have a certain hardness and are not easy to deform, and can play a supporting role; the bottom of the annular cavity is solid and thick elastic material, which is not easy to deform, and contains electromagnetic coils 1064 for generating magnetic fields. The electromagnetic coils 1064 at the bottom of the annular cavity are distributed directly below the cavities at the four corners. After power is turned on, they can provide a vertical magnetic field to the magnetic fluid 1066 in the cavity, causing the magnetic fluid 1066 to deform to varying degrees, and drive the elastic film on the upper surface of the cavity to deform, and finally cause the lens barrel to move.

[0071] It should be pointed out that the initial state of the PDMS material is liquid. After adding a certain ratio of curing agent (usually PDMS: curing agent = 10:1), it can form the required elastic solid with extremely high light transmittance. Therefore, from the perspective of manufacturing technology, it is only necessary to design a mold with a specific structure. This material can easily produce a magnetic fluid 1066 sealed annular cavity, and the coil mentioned above can also be directly integrated into the bottom layer of the annular cavity through the change process of PDMS liquid to solid, thereby integrating the drive device required for module focus / anti-shake, which is convenient for subsequent module assembly.

[0072] The focusing method using the above specific embodiment is as follows: when the same current is passed through the four electromagnetic coils 1064, the deformation degree of the four corners is the same, and the lens barrel can be driven vertically upward to achieve the focusing function.

[0073] The method of applying the above specific embodiment to anti-shake is as follows: when different currents are passed through the four electromagnetic coils 1064, the four corners can respectively produce different deformations, driving the lens barrel to tilt at different angles, thereby compensating for the overall shake of the module and achieving anti-shake.

[0074] According to the embodiments of the camera module and the electronic device of the present application, by setting a magnetorheological elastomer structure between the lens assembly and the lens holder assembly, under the action of the magnetorheological elastomer structure, the characteristics of the magnetic fluid are utilized to achieve anti-shake and focusing effects without occupying more space.

[0075] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0076] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A camera module, characterized in that: include: Mirror mount assembly; A lens assembly, arranged on one side of the lens base assembly; A magnetorheological elastomer structure is provided between the lens assembly and the lens seat assembly. The lens seat assembly, the lens assembly and the magnetorheological elastomer structure are stacked. The magnetorheological elastomer structure includes at least one sealed cavity filled with magnetic fluid. The wall surface of one end of the sealed cavity close to the lens assembly is an elastic surface. An electromagnetic coil is arranged corresponding to the elastic surface; When the electromagnetic coil is energized, a magnetic field corresponding to the sealed cavity is generated, and the magnetic fluid changes with the magnetic field, causing the sealed cavity as a whole to change accordingly, causing the elastic surface to deform; The elasticity of the wall surface of one end of the sealing cavity close to the lens assembly is greater than the elasticity of the wall surface of one end away from the lens assembly; and / or The elasticity of the circumferential wall surface of the sealing cavity is smaller than the elasticity of the wall surface at one end of the sealing cavity close to the lens assembly.

2. The camera module according to claim 1, characterized in that: The magnetorheological elastomer structure comprises: A support base body, wherein a plurality of first cavities are formed in the support base body; A cover body is disposed on one side of the bracket base body, and the cover body is sealed and connected to the bracket base body; Wherein, the first cavity and the cover cooperate to form the sealed cavity.

3. The camera module according to claim 2, characterized in that: The elasticity of a portion of the cover body opposite to the first cavity is greater than the elasticity of the bracket seat.

4. The camera module according to claim 3, characterized in that: Also includes: A plurality of second cavities are disposed on the cover body, and each of the second cavities is disposed opposite to the first cavity; Wherein, the elasticity of the bottom of the second cavity is greater than the elasticity of the bracket seat.

5. The camera module according to any one of claims 1 to 4, characterized in that: A plurality of the sealed cavities are arranged in a circular array around the optical axis of the lens assembly; or The plurality of sealed cavities are arranged in a matrix array.

6. The camera module according to any one of claims 1 to 4, characterized in that: include: A circuit board is provided with an image sensor, and the image sensor is arranged opposite to the lens assembly.

7. The camera module according to any one of claims 1 to 4, characterized in that: The mirror base assembly specifically comprises: A lens holder body connected to a side of the magnetorheological elastomer structure away from the lens assembly; The infrared filter is arranged on the lens holder body.

8. The camera module according to any one of claims 2 to 4, characterized in that: The magnetorheological elastomer structure is integrally formed.

9. The camera module according to any one of claims 1 to 4, characterized in that: The magnetorheological elastomer structure protrudes from a wall surface of the sealed cavity close to the lens assembly, and the lens assembly is bonded to the protruding portion of the sealed cavity.

10. An electronic device, characterized in that: include: case; The camera module as described in any one of claims 1 to 9 is arranged on the shell.

Images