Liquid lens and optical curve adjusting method thereof, camera module and terminal device

Abstract

The present disclosure relates to a liquid lens, an optical curve adjusting method thereof, a camera module and a terminal device. The liquid lens comprises a light-transmissive groove-shaped component, a liquid medium contained in the groove-shaped component, and an elastically deformable film encapsulating the groove-shaped component. The encapsulating part of the film corresponding to the groove of the groove-shaped component is a light-transmissive structure with unequal thickness. In use, the thickness of the local position of the deformable film is adjusted according to the required target optical curve, so as to be configured into a qualified structure with unequal thickness. Under the driving of external force, the film can be deformed to press the liquid medium, so as to obtain the same optical curve as the required target optical curve, thereby meeting the optical requirement.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of electronic device camera, in particular, to a liquid lens, a camera module, a terminal device and a manufacturing method of the liquid lens. BACKGROUND

[0002] The liquid lens is a kind of optical element without mechanical connection made of liquid, which can change the internal parameters of the optical element through external control. Compared with the traditional lens, simply speaking, the medium of the lens is changed from solid glass to liquid, and the shape of the liquid is changed during use to achieve the optical requirements such as focusing.

[0003] The traditional liquid lens includes a liquid, a light-transmitting groove body for containing the liquid, and a deformable film encapsulating the groove body. During use, the deformable film is deformed by applying pressure to control the shape of the liquid to obtain the required optical curve. The shape of the deformed film is similar to that of the conventional glass lens. In order to adjust the imaging effect of the liquid lens, the liquid medium is usually replaced, the film type is changed, and the overall size of the lens is adjusted. However, even so, when the optical path of the liquid lens is simulated, the curve generated after the deformation of the film still cannot be consistent with the required optical curve, and the optical requirements cannot be met. SUMMARY

[0004] The purpose of the present disclosure is to provide a liquid lens and an optical curve adjusting method thereof, a camera module and a terminal device to at least partially solve the problems in the related art.

[0005] In order to achieve the above-mentioned purpose, the present disclosure provides a liquid lens, which comprises a light-transmitting groove component, a liquid medium contained in the groove component, and an elastically deformable film encapsulating the groove component, wherein the encapsulation part of the film corresponding to the groove of the groove component is a light-transmitting structure with unequal thickness.

[0006] Optionally, it further comprises a ring-shaped pressing plate, which is attached to the side of the film away from the liquid medium, for pressing the film.

[0007] Optionally, the part of the encapsulation part corresponding to the inner side of the pressing plate is a structure with unequal thickness.

[0008] Optionally, the encapsulation part and the pressing plate are shape-matched, the pressing plate is configured as a circular ring, or a square ring, or an elliptical ring, and the pressing plate is centrally arranged in the encapsulation part.

[0009] Optionally, the surface of the film facing the liquid medium is a plane, and the surface away from the liquid medium is centrally formed with a ring-shaped first groove and / or a ring-shaped first protrusion.

[0010] Optionally, the number of the grooves is multiple, and / or the number of the protrusions is multiple.

[0011] Optionally, the surface of the thin film facing the liquid medium is planar, and the surface of the thin film facing away from the liquid medium is centrally formed with a spherical second protrusion and / or a spherical second groove.

[0012] Optionally, the refractive index of the thin film is the same as the refractive index of the liquid medium.

[0013] According to a second aspect of the present disclosure, a camera module is provided, comprising: a platform for mounting the liquid lens described above; a driving part comprising at least three groups of driving mechanisms, and a base for mounting the driving mechanisms, wherein the platform has driving positions corresponding to each of the driving mechanisms respectively, the driving mechanisms are used to drive the platform at the corresponding driving positions respectively, and make the thin film of the liquid lens deformed.

[0014] Optionally, further comprising a plurality of support members respectively having protrusions in spherical or semi-spherical shape, the curved surfaces of the protrusions support the platform, the support members are configured to be driven by the corresponding driving mechanisms, and make the platform follow.

[0015] Optionally, further comprising a bearing part for bearing the platform and a spring for pressing the bearing part onto the protrusions, the bearing part is provided with abutting pieces extending radially outward, the protrusions abut against the abutting pieces, two sides of the abutting pieces are respectively connected to one end of the spring, and the other end of the spring is fixedly connected to the support member.

[0016] Optionally, the driving mechanism comprises a magnet and a coil, one of the magnet and the coil is fixed on the support member, and the other is fixed on the base, and the electromagnetic force generated between the coil and the magnet after the coil is energized is used to drive the support member to move.

[0017] Optionally, one of the base and the support member in which the coil is fixed is further fixed with a magnetic conducting sheet, which is used to be magnetically attracted to the magnet to provide a driving force for resetting the platform.

[0018] Optionally, the base comprises a bottom plate and a vertical plate vertically arranged on the upper surface of the bottom plate, and the camera module further comprises a guiding part, the guiding part comprises a plurality of balls arranged between the support member and the vertical plate, wherein at least one of the support member and the vertical plate is provided with a groove extending along the movement direction of the moving part of the support member, and the balls are accommodated in the groove.

[0019] Optionally, a control unit for controlling the driving mechanism and a position sensor connected to the control unit are further included, the position sensor is used to detect the real-time position of the driving position and feed back the detection result to the control unit.

[0020] According to a third aspect of the present disclosure, a terminal device is provided, comprising the camera module as described above.

[0021] According to a fourth aspect of the present disclosure, an optical curve adjusting method of a liquid lens is provided, the liquid lens comprising a light-transmissive groove-shaped component, a liquid medium contained in the groove-shaped component, and an elastically deformable film encapsulating the groove-shaped component, an encapsulating part of the film corresponding to a slot of the groove-shaped component being a light-transmissive structure, the method comprising: imaging a target object using the liquid lens; applying a force to the encapsulating part towards the inside of the groove-shaped component, and obtaining an optical curve of the liquid lens through a computer simulator; determining a displacement difference between the optical curve and a target curve according to a target imaging effect; and determining a target thickness of each position of the film according to the displacement difference.

[0022] Through the above technical solution, when in use, the thickness of the local position of the deformable film is adjusted according to the required target optical curve, so as to be configured into a qualified non-uniform thickness structure, that is, under the driving of external force, the film can deform and extrude the liquid medium to obtain the same optical curve as the required target optical curve, thereby meeting the optical requirements.

[0023] Other features and advantages of the present disclosure will be described in detail in the following detailed description section. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0025] Figures 1-3 are respectively an exploded view, a front view and an optical curve of a film-equal-thickness liquid lens according to an exemplary embodiment of the present disclosure;

[0026] Figures 4-6 are respectively an exploded view, a front view and an optical curve of a first film-non-uniform-thickness liquid lens according to an exemplary embodiment of the present disclosure;

[0027] Figures 7-9 are respectively an exploded view, a front view and an optical curve of a second film-non-uniform-thickness liquid lens according to an exemplary embodiment of the present disclosure;

[0028] Figures 10-12are respectively an exploded view, a front view and an optical curve of a third thin film liquid lens exemplarily shown according to the present disclosure;

[0029] Figures 13-15 are respectively an exploded view, a front view and an optical curve of a fourth thin film liquid lens exemplarily shown according to the present disclosure;

[0030] Figures 16-18 are respectively an exploded view, a front view and an optical curve of a fifth thin film liquid lens exemplarily shown according to the present disclosure;

[0031] Figures 19-21 are respectively an exploded view, a front view and an optical curve of a sixth thin film liquid lens exemplarily shown according to the present disclosure;

[0032] Figure 22 is an exploded view of a thin film liquid lens with an elliptical ring shape exemplarily shown according to the present disclosure;

[0033] Figure 23 is an exploded view of a thin film liquid lens with a square ring shape exemplarily shown according to the present disclosure;

[0034] Figure 24 is a schematic view of a camera module exemplarily shown according to the present disclosure;

[0035] Figures 25-26 are two exploded views of a camera module exemplarily shown according to the present disclosure;

[0036] Figure 27 is a schematic view of a terminal device exemplarily shown according to the present disclosure.

[0037] BRIEF DESCRIPTION OF DRAWINGS

[0038] 10 - slot-shaped component; 20 - liquid medium; 30 - thin film; 40 - pressing plate; 50 - platform; 60 - driving mechanism; 61 - magnet; 62 - coil; 70 - platform; 71 - bottom plate; 72 - vertical plate; 80 - support; 81 - protrusion; 90 - spring sheet; 100 - bearing part; 101 - abutting piece; 110 - guide part; 111 - ball; 112 - slot; 120 - magnetic conducting sheet; 130 - machine body. DETAILED DESCRIPTION

[0039] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0040] In the present disclosure, the orientation words "inner" and "outer" are understood based on the application environment of the relevant components, which can be defined based on the actual use direction of the relevant components, or can be according to the contour of the component itself. For example: the part of the packaging portion corresponding to the "inner side" of the pressing plate refers to the part of the packaging portion surrounded by the inner diameter of the pressing plate; the abutting piece provided on the outer periphery of the bearing portion extends outwardly refers to the abutting piece located on the side of the bearing portion away from the center of the circle.

[0041] In addition, the following description relates to the drawings, and the same numbers in different drawings represent the same or similar elements unless otherwise indicated.

[0042] First, in order to facilitate the understanding of the technical solutions, refer to Figures 1-3 The optical curve of the thin film 30 and the like is briefly introduced. The thin film 30 in the related art is designed to be equal in thickness. The thin film 30 is deformed due to the extrusion of the pressing plate 40. Since the thickness of each position of the thin film 30 is uniform, refer to Figure 3 The optical curve generated by the deformation cannot meet the requirements of the target optical curve, and the resolution is often uneven, making it difficult to obtain a better imaging effect.

[0043] Refer to Figures 4-21 The present disclosure provides a liquid lens, which includes a light-transmissive groove-shaped component 10, a liquid medium 20 contained in the groove-shaped component 10, and an elastically deformable thin film 30 encapsulating the groove-shaped component 10, wherein the encapsulation portion of the thin film 30 corresponding to the groove of the groove-shaped component 10 is a light-transmissive structure of unequal thickness.

[0044] In order to meet the basic optical imaging requirements, the present disclosure requires that the groove-shaped component 10 and the thin film 30 are both configured to be light-transmissive. In some embodiments, the groove-shaped component 10 can include transparent glass and a frame sealing around the outer periphery of the glass. In other embodiments, the groove-shaped component 10 can be integrally formed by transparent glass, which is not limited by the present disclosure.

[0045] It should be explained that the optical curve refers to the curve profile of the surface of the lens, and in the present disclosure, it refers to the profile curve formed on the surface of the liquid medium 20 after being extruded by the thin film 30. The target optical curve refers to a pre-set surface profile curve of the lens that can meet the optical requirements. The optical curve is not repeated below.

[0046] By using the technical scheme, when in use, the thickness of the local position of the deformable film 30 is adjusted according to the required target optical curve, so as to be configured into a qualified non-uniform thickness structure, that is, under the driving of an external force, the film 30 can be deformed to extrude the liquid medium 20 to obtain the same optical curve as the required target optical curve, so as to meet the optical requirement. Specifically, by arranging the film 30 into a non-uniform thickness structure, a more complex optical curve that cannot be obtained by an equal-thickness film 30 can be obtained, for example, the curvatures at the middle and edges of the optical curve are different. Further, by the optical curve with different curvatures at the edges and the middle, the imaging range of the lens can be expanded, so that the light rays located at the edges of the lens can be well focused and focused to realize optical imaging.

[0047] Correspondingly, with reference to Figure 25 The present disclosure also provides an optical curve adjusting method of a liquid lens, which comprises the following steps:

[0048] imaging a target object by using the liquid lens; applying a force to the packaging part towards the inside of the groove-shaped part 10, and obtaining the optical curve of the liquid lens by a computer simulator; determining the displacement difference between the optical curve and the target curve according to the target imaging effect; and determining the target thickness of each position of the film 30 according to the displacement difference.

[0049] It should be noted that the target imaging effect described above is determined according to the actual application scene of the lens, for example, the functional requirements of a wide-angle lens and a long-focus lens are different, and the shape of the film 30 required by the lens should also be different. The liquid lens in the embodiment can be used independently, or can be combined with other lenses to form a lens group. Of course, the other lenses should be kept in a fixed position, and only the film 30 of the liquid lens is displaced during operation. In actual operation, the target object, the liquid lens, the photosensitive chip and the computer simulator and other components are connected in place, and the displacement of the film 30 is adjusted by adjusting the force towards the groove-shaped part 10. When the film moves to a position where the image is clear, the computer simulator can display the current optical curve and obtain the imaging effect of the image. According to the imaging effect, it can be determined whether the clarity of each position of the image is uniform. If there is a deviation, the optimal target position of the optical curve at this time can be determined, that is, the displacement difference between the current curve and the target curve is obtained, and then the target thickness of each position of the film 30 is determined according to the displacement difference.

[0050] The adjusting method has all the beneficial effects of the liquid lens described above, which will not be repeated here. The type of computer simulation software is not limited in the present disclosure, for example, it can be Ansys.

[0051] In addition, in the present disclosure, in order to avoid the fact that the film 30 of the liquid lens itself has a certain thickness and its light transmittance and refractive index are different from those of the liquid medium 20, resulting in poor focusing and zooming effect, in the present disclosure, the refractive index of the film 30 can be the same as that of the liquid medium 20. For example, the liquid medium 20 can be a mixture of pre-allocated glycerol and water, so that its refractive index and light transmittance are the same as those of the film 30. Of course, in other embodiments, the liquid medium 20 can be adjusted adaptively according to requirements, and the present disclosure does not limit this.

[0052] In order to make the film 30 can be uniformly subjected to a predetermined extrusion force, so as to be able to deform to obtain the required optical curve, in some embodiments, the liquid lens can further include a ring-shaped pressing plate 40, which can be attached to the side of the film 30 away from the liquid medium 20, so as to extrude the film 30.

[0053] Further, in order to prevent the pressing plate 40 from blocking the light path and affecting the imaging effect, in some embodiments, the part of the packaging portion corresponding to the inner side of the pressing plate 40 is of unequal thickness structure (i.e. all imaging light passes through the part surrounded by the inner ring of the pressing plate 40).

[0054] Referring to Figures 4-21 In order to make the imaging light path be able to focus uniformly and meet the imaging requirements, in some embodiments, the packaging portion can be circular and configured as an axial rotationally symmetrical structure, and the pressing plate 40 can be configured as a circular ring and centrally arranged in the packaging portion. In addition, referring to Figures 22-23 In other embodiments, the pressing plate 40 can also be configured as an elliptical ring or a square ring matched with the shape of the packaging portion, and the present disclosure does not limit this.

[0055] The present disclosure does not limit the specific thickness of the film 30 of unequal thickness, and the size of the film 30 is different for different target optical curves. For example, in some embodiments, the surface of the film 30 facing the liquid medium 20 can be a plane, and the surface away from the liquid medium 20 can be centrally formed with a ring-shaped recess or a ring-shaped protrusion. In addition, in other embodiments, the surface of the film 30 away from the medium 20 can be centrally formed with a ring-shaped first recess and a ring-shaped first protrusion at the same time.

[0056] Alternatively, in other embodiments, the surface of the film 30 facing the liquid medium 20 can be a plane, and the surface away from the liquid medium 20 can be centrally formed with a spherical second protrusion or a spherical second recess. In addition, the surface away from the liquid medium 20 can also be centrally formed with a spherical second protrusion and a spherical second recess at the same time.

[0057] Of course, in order to meet some higher requirements of the target optical curve, the above-mentioned second convex and second concave of the spherical surface can be used in combination with the annular first concave and the annular first convex, and the number of the above-mentioned concave and the above-mentioned convex can be multiple.

[0058] In order to facilitate the understanding of the unequal thickness film 30, the following introduces several specific embodiments in combination with the drawings:

[0059] Embodiment 1: refer to Figures 4-6 , provide a liquid lens, the surface of the film 30 away from the liquid medium 20 can be formed with annular convex with cross section of flat inverted U-shaped, its optical curve as Figure 6 shown.

[0060] Embodiment 2: refer to Figures 7-9 , provide a liquid lens, the surface of the film 30 away from the liquid medium 20 can be formed with annular concave with cross section of flat U-shaped, its optical curve as Figure 9 shown.

[0061] Embodiment 3: refer to Figures 10-12 , provide a liquid lens, the surface of the film 30 away from the liquid medium 20 can be formed with convex of spherical surface, its optical curve as Figure 12 shown.

[0062] Embodiment 4: refer to Figures 13-15 , provide a liquid lens, the surface of the film 30 away from the liquid 20 can be formed with concave of spherical surface, its optical curve as Figure 15 shown.

[0063] Embodiment 5: refer to Figures 16-18 , provide a liquid lens, the surface of the film 30 away from the liquid medium 20 can be formed with annular concave with cross section of flat U-shaped, the part of the film 30 surrounded by the inner diameter of the annular concave can also be formed with convex of spherical surface, its optical curve as Figure 18 shown.

[0064] Embodiment 6: refer to Figures 19-21 , provide a liquid lens, the surface of the film 30 away from the liquid medium 20 can be formed with annular convex with cross section of flat inverted U-shaped, the part of the film 30 surrounded by the inner diameter of the annular convex can also be formed with concave of spherical surface, its optical curve as Figure 21 shown.

[0065] The above-mentioned six embodiments are only for the convenience of understanding the unequal thickness film 30, but not limited to the above-mentioned six cases.

[0066] According to another aspect of the present disclosure, refer to Figures 24-26The application provides a camera module, which can comprise: a platform 50 for mounting the liquid lens; a driving part comprising at least three groups of driving mechanisms 60; and a base 70 for mounting the driving mechanisms 60, wherein the platform 50 has driving positions corresponding to the driving mechanisms 60 respectively, the driving mechanisms 60 are used for driving the platform 50 at the corresponding driving positions and making the film 30 of the liquid lens deform, and the camera module has all the beneficial effects of the universal actuator, which will not be repeated here.

[0067] In order to enable the driving mechanisms 60 to drive the platform 50 to move, refer to Figures 24-26 In some embodiments, the camera module can further comprise a plurality of supporting members 80 respectively having spherical or hemispherical protrusions 81, the curved surfaces of the protrusions 81 support the platform 50, and the supporting members 80 are configured to be driven by the corresponding driving mechanisms 60 and make the platform 50 follow.

[0068] In order to enable the platform 50 to keep uniform stress when being supported by the protrusions 81 and enable the platform 50 to be pressed on the protrusions 81 to quickly respond to the support force of the protrusions 81, refer to Figures 24-26 In some embodiments, a bearing part 100 for bearing the platform 50 and a spring 90 for pressing the bearing part 100 to the protrusions 81 are further included, the bearing part 100 is provided with abutting pieces 101 extending radially outward, the protrusions 81 abut against the abutting pieces 101, two sides of the abutting pieces 101 are respectively connected to one end of the spring 90, and the other end of the spring 90 is fixedly connected to the supporting member 80.

[0069] In the embodiments of the application, the spring 90 can be fixed to the bearing part 100 at one end and to the supporting member 80 at the other end, and the spring 90 has an elastic force for pressing the bearing part 100 to the protrusions 81. At this time, one end of the spring 90 can be directly fixedly connected to the bearing part 100, the connection mode can be bonding, bolt connection, etc., and the other end is fixed to the supporting member 80, specifically, two convex points can be arranged on the top surface of the supporting member 80, and a round hole is arranged at the end of the spring 90 connected to the supporting member 80, so as to be fixedly sleeved on the convex points corresponding in position. Of course, in other embodiments, the other end of the spring 90 can be directly welded to the top surface of the supporting member 80.

[0070] The shape of the bearing part 100 is not limited in the application and can be a circular ring, a square ring or a plate, etc. The spring 90 is configured to have an elastic force towards the protrusions 81 to press the abutting pieces 101 to the protrusions 81.

[0071] Refer to Figure 26In order to drive the support 80 to move, in the embodiment, the driving mechanism 60 can be an electromagnetic driver, which can include a magnet 61 and a coil 62, one of which is fixed on the support 80 and the other of which is fixed on the base 70, and the electromagnetic force generated between the coil 62 and the magnet 61 after the coil 62 is electrified is used to drive the support 80 to move. In the embodiment, the coil 62 is fixed on the base 70, and in use, the coil 62 is electrified according to the requirement, and the magnetic force is generated with the magnet 61. Since the coil 62 is fixed and cannot move, the reaction force drives the magnet 61 to move, and since the magnet 61 is fixed in the support 80, the driving mechanism 60 can drive the support 80 to move. Of course, in other embodiments, the positions of the magnet 61 and the coil 62 can be exchanged, and the present disclosure does not limit this.

[0072] It should be noted that, with reference to Figure 26 In the embodiment, the driving mechanism 60 and the support 80 are each provided with three, and the three supports 80 each correspond to one driving mechanism 60, and the three driving mechanisms 60 can move independently of each other. In order to make the platform 50 stably move under the driving of the three driving mechanisms 60, with reference to Figure 22 In some embodiments, the three driving mechanisms 60 can be arranged at equal intervals in the direction surrounding the platform 50.

[0073] In addition, in order to provide a reset force to the platform 50 after movement, with reference to Figure 26 In some embodiments, one of the base 70 and the support 80 in which the coil 62 is fixed is also fixed with a magnetic conductive sheet 120, which is used to be magnetically attracted with the magnet 61 to provide a driving force to reset the platform 50. In addition, the magnetic conductive sheet 120 can also be used to increase the magnetic force.

[0074] In the embodiment, the magnetic conductive sheet 120 can be fixed on the vertical plate 72 to be mentioned below at a position corresponding to the coil 62, and in addition, if the coil 62 is fixed in the support 80, the magnetic conductive sheet 110 can be fixed to the support 80 at a position corresponding to the coil 62. The present disclosure does not limit the type of the driving mechanism 60, for example, in some embodiments, the driving mechanism 60 can be an electromagnetic driver, and in other embodiments, the driving mechanism 60 can also be an SMA driver or a piezoelectric driver, and when the driving mechanism 60 is an SMA driver or a piezoelectric driver, the corresponding other components can be adjusted accordingly.

[0075] With reference to Figure 26In order to provide support and guidance for the movement of the support member 80, in some embodiments, the base 70 can include a bottom plate 71 and a vertical plate 72 erected on the upper surface of the bottom plate 71, and the camera module can further include a guide portion 110, which can include a plurality of rolling balls 111 arranged between the support member 80 and the vertical plate 72, wherein at least one of the support member 80 and the vertical plate 72 is provided with a groove 112 extending along the movement direction of the movement portion of the driving member 60, and the rolling balls 111 are accommodated in the groove 112. In addition, in other embodiments, the rolling balls 111 can be replaced by sliding shafts, which are not limited in the present disclosure.

[0076] It should be emphasized that, in the present embodiment, in order to increase the stability of the guide, the groove 112 can be provided with two groups, which are symmetrically arranged near the two sides of the end surface forming the groove 112.

[0077] In order to ensure the accuracy of the displacement of the platform 50, the driving mechanism 60 is closed-loop controlled, and in the present embodiment, the camera module further includes a control portion for controlling the driving mechanism 60 and a position sensor connected to the control portion, which is used to detect the real-time position of the driving position and feed back the detection result to the control portion.

[0078] In the embodiments of the present disclosure, the extrusion stroke of the driving mechanism 60 is precisely controlled by the closed-loop control system, which can ensure the uniformity of the deformation of the film 30, and on the other hand, by controlling the driving mechanism 60 in a closed loop and cooperating with different support members 80, different extrusion deformations can be applied to different regions of the film 30 to offset the errors caused in the film processing process or the liquid lens assembly process, thereby improving the imaging effect. In addition, when the liquid lens is arranged non-horizontally upward, the film 30 can be subjected to uneven extrusion deformation to offset the influence of the gravity of the liquid medium 20 on the deformation of the film 30.

[0079] According to another aspect of the present disclosure, referring to Figure 27 , a terminal device is provided, which includes the above-mentioned camera module. For example, when the terminal device is a mobile phone, it can include the above-mentioned camera module and a body 130, and the terminal device has all the beneficial effects of the above-mentioned camera module, which will not be described here.

[0080] The preferred embodiments of the present disclosure are described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details in the above-described embodiments, and various simple modifications can be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, which all belong to the protection scope of the present disclosure.

[0081] It should be further noted that various specific technical features described in the above specific embodiments can be combined in any suitable manner, and the disclosure will not be repeated here for various possible combinations.

[0082] In addition, various different embodiments of the disclosure can also be combined with each other as long as they do not contradict the idea of the disclosure, and they should also be considered as disclosed by the disclosure.

Claims

1. A camera module, characterized in that: include: A platform (50) is used to install a liquid lens, the liquid lens comprising a light-transmitting groove-shaped component (10), a liquid medium (20) contained in the groove-shaped component (10), and an elastically deformable film (30) encapsulating the groove-shaped component (10), wherein the encapsulation portion of the film (30) corresponding to the notch of the groove-shaped component (10) is a light-transmitting structure with unequal thickness; A driving unit comprising at least three sets of driving mechanisms (60), and A base (70) for mounting the driving mechanism (60), The platform (50) has driving positions corresponding to the respective driving mechanisms (60), and the driving mechanisms (60) are used to drive the platform (50) at the corresponding driving positions and cause the film (30) of the liquid lens to deform. The camera module further comprises a plurality of support members (80) each having a spherical or hemispherical protrusion (81), wherein the arc surface of the protrusion (81) supports the platform (50), and the support members (80) are configured to be driven by their corresponding driving mechanisms (60) and to cause the platform (50) to follow the movement. The camera module further comprises a bearing portion (100) for bearing the platform (50) and a spring piece (90) for pressing the bearing portion (100) onto the protrusion (81); an abutment piece (101) extending radially outward is provided on the outer periphery of the bearing portion (100); the protrusion (81) abuts against the abutment piece (101); two sides of the abutment piece (101) are respectively connected to one end of the spring piece (90); and the other end of the spring piece (90) is fixedly connected to the support member (80).

2. The camera module according to claim 1, wherein: It also includes an annular pressing plate (40), which is attached to the side of the film (30) facing away from the liquid medium (20) to press the film (30).

3. The camera module according to claim 2, wherein: The portion of the packaging portion corresponding to the inner side of the pressing plate (40) is a structure of uneven thickness.

4. The camera module according to claim 2 or 3, wherein: The packaging portion matches the shape of the pressure plate (40); the pressure plate (40) is configured as a circular ring, a square ring, or an elliptical ring; and the pressure plate (40) is centrally arranged on the packaging portion.

5. The camera module according to claim 3, wherein: The surface of the film (30) facing the liquid medium (20) is a plane, and the surface facing away from the liquid medium (20) is centrally formed with an annular first groove and / or an annular first protrusion.

6. The camera module according to claim 5, wherein: There are multiple first grooves, and / or There are multiple first protrusions.

7. The camera module according to claim 3, wherein: The surface of the film (30) facing the liquid medium (20) is a plane, and a second spherical protrusion or a second spherical groove is formed in the center of the surface facing away from the liquid medium (20).

8. The camera module according to claim 1, wherein: The driving mechanism (60) comprises a magnet (61) and a coil (62), one of the magnet (61) and the coil (62) being fixed on the support member (80), and the other being fixed on the base (70), and the electromagnetic force generated between the coil (62) and the magnet (61) when energized is used to drive the support member (80) to move.

9. The camera module according to claim 8, wherein: One of the base (70) and the support (80) to which the coil (62) is fixed is also fixed with a magnetic conductive sheet (120) for magnetically cooperating with the magnet (61) to provide a driving force for resetting the platform (50).

10. The camera module according to claim 1, wherein: The base (70) includes a bottom plate (71) and a vertical plate (72) vertically arranged on the upper surface of the bottom plate (71), and the camera module further includes a guide portion (110), and the guide portion (110) includes a ball (111) arranged between the support member (80) and the vertical plate (72), wherein at least one of the support member (80) and the vertical plate (72) is provided with a groove (112), and the groove (112) extends along the movement direction of the moving part of the support member (80), and the ball (111) is accommodated in the groove (112).

11. The camera module according to claim 1, wherein: It also includes a control unit for controlling the driving mechanism (60) and a position sensor connected to the control unit, wherein the position sensor is used to detect the real-time position of the driving position and feed back the detection result to the control unit.

12. A terminal device, characterized in that: A camera module comprising any one of claims 1-11.

13. A method for adjusting the optical curve of a liquid lens, the liquid lens comprising a light-transmitting groove-shaped component (10), a liquid medium (20) contained in the groove-shaped component (10), and an elastically deformable film (30) encapsulating the groove-shaped component (10), wherein the encapsulation portion of the film (30) corresponding to the notch of the groove-shaped component (10) is a light-transmitting structure, characterized in that: The method comprises: Imaging a target object using the liquid lens; Applying a force toward the interior of the groove-shaped component (10) to the packaging portion, and obtaining an optical curve of the liquid lens through a computer simulator; Determining a displacement difference between the optical curve and the target curve according to a target imaging effect; and The target thickness of each position of the film (30) is determined according to the displacement difference.

Images