CN116953875A - Variable focal length lens device and camera module - Google Patents

Abstract

The invention discloses a variable focal length lens device and an image pickup module, wherein the variable focal length lens device comprises a driving part, a deforming part, a fixed part and a movable part. The deformation portion includes a light-transmitting film and a high polymer, an incident surface of the high polymer corresponds to a middle portion of the light-transmitting film, the fixing portion includes a base, the base is located at an outer side of the high polymer, wherein a periphery of the light-transmitting film is connected to a top side of the base, the movable portion includes a light-transmitting plate, and the light-transmitting plate is drivably connected to the driving portion in such a manner as to be suspended at a bottom side of the base, wherein an exit surface of the high polymer corresponds to the light-transmitting plate.

Description

Variable focal length lens device and camera module

Technical Field

The present invention relates to optical imaging devices, and more particularly to a variable focal length lens device and an imaging module.

Background

The global smart phone occupancy is improved year by year, and simultaneously with the rising of novel social modes such as short videos, self-media and the like, the shutter of the smart phone is pressed at any time to record good moments through the camera module arranged on the smart phone, so that the smart phone has become one of life modes of people. Based on this, consumers are increasingly demanding imaging quality and miniaturization of camera modules configured in smartphones. It can be understood that, on the basis of the structure of the existing camera module, in order to improve the imaging quality of the camera module, the volume of the lens assembly of the camera module is designed to be larger and larger, and a driving assembly with stronger driving force and larger size is required to drive the lens assembly to move along the optical axis so as to realize zooming of the camera module.

Disclosure of Invention

An object of the present invention is to provide a variable focal length lens device and an image pickup module in which the surface shape of the incident surface of a high polymer of the variable focal length lens device can be changed to change the optical power of the variable focal length lens device to realize zooming of the image pickup module.

An object of the present invention is to provide a variable focal length lens device and an image capturing module, in which the height dimension of the image capturing module is not increased during zooming of the image capturing module by changing the surface shape of the incident surface of the high polymer of the variable focal length lens device, so that a space for zooming the image capturing module is not required to be reserved for a portable electronic device (for example, a smart phone), which is advantageous for the portable electronic device to develop toward the light and thin direction.

An object of the present invention is to provide a variable focal length lens device and an image pickup module, in which the image pickup module can achieve zooming by changing the surface shape of a polymer of the variable focal length lens device, and the requirement of the image pickup module for the driving force of the driving portion of the variable focal length lens device is reduced relative to the conventional manner of driving the entire lens assembly, so as to facilitate the simplification of the structure of the driving portion and the reduction of the size of the driving portion, thereby achieving the miniaturization of the image pickup module.

An object of the present invention is to provide a variable focal length lens device and an image pickup module in which the driving section drives a movable section of the variable focal length lens device in an electromagnetically driven manner to allow a deformed section of the variable focal length lens device to deform in a predetermined manner to achieve zooming of the image pickup module, such that the driving section of a small size can provide a larger driving force to allow the image pickup module to zoom in a larger zoom range.

An object of the present invention is to provide a variable focal length lens device and an image pickup module, wherein the driving portion uniformly applies force around the movable portion to drive the movable portion to move along the optical axis to control the periphery of the deformed portion to uniformly deform around the optical axis, thereby providing the image pickup module with a stable optical structure.

An object of the present invention is to provide a variable focal length lens device and an image capturing module, wherein a lens assembly of the image capturing module is located between the variable focal length lens device and a photosensitive assembly, so as to correct aberration of an optical system of the image capturing module and improve an imaging effect of the image capturing module.

An object of the present invention is to provide a variable focal length lens device and an image pickup module, wherein the driving unit can drive the movable portion to translate, tilt or rotate so as to realize anti-shake of the image pickup module.

According to one aspect of the present invention, there is provided a variable focal length lens apparatus comprising:

a driving section;

a deformation portion, wherein the deformation portion includes a light-transmitting film and a high polymer, an incident surface of the high polymer corresponding to a middle portion of the light-transmitting film;

a fixing portion, wherein the fixing portion includes a base located outside the high polymer, wherein a periphery of the light-transmitting film is connected to a top side of the base; and

and a movable portion, wherein the movable portion includes a light-transmitting plate that is drivably connected to the driving portion in such a manner as to be suspended from a bottom side of the base, wherein an exit surface of the high polymer corresponds to the light-transmitting plate.

According to one embodiment of the invention, the incidence surface of the high polymer is attached snugly to the middle of the light-transmitting film.

According to one embodiment of the invention, the exit face of the polymer is adhesively connected to the light-transmitting plate.

According to one embodiment of the invention, the fixing portion includes a substrate having a substrate perforation, wherein a peripheral edge of the light-transmitting film is attached to the substrate, the substrate perforation of the substrate corresponds to a middle portion of the light-transmitting film, wherein the substrate is disposed at a top side of the base to allow the peripheral edge of the light-transmitting film to be connected to the top side of the base through the substrate.

According to one embodiment of the invention, the substrate is a black opaque material; or the surface of the substrate is coated with a black coating.

According to one embodiment of the invention, the incident end of the high polymer is provided with a boss and an abutting platform surrounding the boss, the boss protrudes out of the abutting platform, wherein the boss of the high polymer extends to the substrate perforation of the substrate and is connected to the middle part of the light-transmitting film in a fitting way, and the abutting platform of the high polymer abuts against the substrate.

According to one embodiment of the invention, the substrate is located on the upper side of the light-transmitting film.

According to one embodiment of the invention, the light-transmitting film is directly connected to the top side of the base.

According to an embodiment of the present invention, the driving portion includes a coil and a magnet, a position of the coil and a position of the magnet correspond to each other, and one of the coil and the magnet is provided to the base and the other is provided to the light-transmitting plate.

According to an embodiment of the present invention, the driving part includes one coil and four magnets, one magnet is provided on each side of the light-transmitting plate, and the coil surrounds the outer sides of the four magnets.

According to an embodiment of the present invention, the driving part includes four coils and four magnets, one magnet is provided on each side of the light-transmitting plate, and one coil is provided on an outer side of each magnet.

According to an embodiment of the present invention, the driving portion includes four coils and four magnets, one magnet is provided at each corner of the light-transmitting plate, and one coil is provided at an outer side of each magnet.

According to one embodiment of the invention, the driving portion includes a magnetically permeable plate disposed on a side of the magnet facing away from the coil.

According to another aspect of the present invention, the present invention further provides an image capturing module, which includes:

a photosensitive assembly;

a lens assembly, wherein the lens assembly is held in a photosensitive path of the photosensitive assembly; and

a variable focal length lens assembly, wherein the variable focal length lens assembly is held in a photosensitive path of the photosensitive assembly, wherein the variable focal length lens assembly further comprises:

a driving section;

a deformation portion, wherein the deformation portion includes a light-transmitting film and a high polymer, an incident surface of the high polymer corresponding to a middle portion of the light-transmitting film;

a fixing portion, wherein the fixing portion includes a base located outside the high polymer, wherein a periphery of the light-transmitting film is connected to a top side of the base; and

and a movable portion, wherein the movable portion includes a light-transmitting plate that is drivably connected to the driving portion in such a manner as to be suspended from a bottom side of the base, wherein an exit surface of the high polymer corresponds to the light-transmitting plate.

According to one embodiment of the invention, the variable focal length lens device is attached to the lens assembly.

According to one embodiment of the invention, the variable focal length lens device is integrated inside the lens assembly.

Drawings

Fig. 1 is a schematic perspective view of an image capturing module according to a preferred embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of the camera module according to the above preferred embodiment of the invention.

Fig. 3A and 3B are respectively exploded views of the camera module according to the above preferred embodiment of the invention.

Fig. 4A and 4B are schematic views of a variable focal length lens device of the camera module according to the above preferred embodiment of the invention.

Fig. 5A and 5B are exploded views of the variable focal length lens device of the camera module according to the above preferred embodiment of the present invention.

Fig. 6A and 6B are schematic cross-sectional views of different states of the variable focal length lens device of the image capturing module according to the above preferred embodiment of the present invention.

Fig. 7 is a schematic cross-sectional view of a modified example of the variable focal length lens device of the image capturing module according to the above preferred embodiment of the present invention.

Fig. 8 is a schematic cross-sectional view of another modified example of the variable focal length lens device of the image capturing module according to the above preferred embodiment of the present invention.

Fig. 9 is a schematic diagram of a bottom view of still another modified example of the variable focal length lens device of the image capturing module according to the above preferred embodiment of the present invention.

Fig. 10 is a schematic diagram of a bottom view of another modified example of the variable focal length lens device of the image capturing module according to the above preferred embodiment of the present invention.

Detailed Description

Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including," "comprising," or "having" and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless specified or limited otherwise, the terms "mounted," "connected," "supported," and "coupled" and variations thereof are used broadly and encompass both direct and indirect mountings, connections, supports, and couplings. Furthermore, "connected" and "coupled" are not restricted to physical or mechanical connections or couplings.

Also, in the present disclosure, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present disclosure and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus the above terms should not be construed as limiting the present disclosure; in a second aspect, the terms "a" and "an" should be understood as "at least one" or "one or more", i.e. in one embodiment the number of one element may be one, while in another embodiment the number of the element may be plural, the term "a" should not be construed as limiting the number.

An image capturing module according to a preferred embodiment of the present invention will be disclosed and described in the following description with reference to fig. 1 to 6B of the drawings, wherein the image capturing module includes a photosensitive member 10, a lens member 20, and a variable focal length lens device 30, and the lens member 20 and the variable focal length lens device 30 are both held in a photosensitive path of the photosensitive member 10.

Specifically, the photosensitive assembly 10 includes a circuit board 11 and a photosensitive chip 12, and the photosensitive chip 12 is connected to the circuit board 11. For example, in this specific example of the camera module of the present invention shown in fig. 1 to 6B, after the back surface of the photosensitive chip 12 is attached to the front surface of the wiring board 11, the pads of the photosensitive chip 12 and the pads of the wiring board 11 are connected by a connection line 13 to achieve connection of the photosensitive chip 12 and the wiring board 11.

Alternatively, in other examples of the camera module of the present invention, when the front surface of the photosensitive chip 12 is attached to the back surface of the circuit board 11, the bonding pad of the photosensitive chip 12 and the bonding pad of the circuit board 11 may be directly bonded to achieve connection between the photosensitive chip 12 and the circuit board 11, and at this time, the photosensitive area of the photosensitive chip 12 corresponds to the reserved light perforation of the circuit board 11.

The photosensitive assembly 10 further includes a lens holder 14, the lens holder 14 is disposed on the circuit board 11, and the lens holder 14 at least surrounds the photosensitive area of the photosensitive chip 12, so that the photosensitive area of the photosensitive chip 12 can correspond to a light path 141 of the lens holder 14, and thus, incident light can reach the photosensitive chip 12 after passing through the light path 141 of the lens holder 14, so as to be imaged by the photosensitive chip 12 through photoelectric conversion.

It should be noted that the manner in which the lens base 14 is disposed on the circuit board 11 is not limited. For example, in the specific example of the camera module of the present invention shown in fig. 1 to 6B, the lens holder 14 is a preform, the lens holder 14 is attached to the circuit board 11 by an adhesive such as glue after the photosensitive chip 12 is attached to the circuit board 11, and the photosensitive area of the photosensitive chip 12 corresponds to the light path 141 of the lens holder 14. Alternatively, in other examples of the camera module of the present invention, the lens holder 14 is integrally bonded to at least a portion of the circuit board 11 and/or the non-photosensitive region of the photosensitive chip 12 during molding, and the lens holder 14 forms the light path 141 during molding to allow the photosensitive region of the photosensitive chip 12 to correspond to the light path 141 of the lens holder 14.

In addition, with continued reference to fig. 3A and 3B, the photosensitive assembly 10 includes at least one electronic component 15, which may be, but is not limited to, a resistor, a capacitor, a processor, a driver, etc., wherein the electronic component 15 is mounted on the circuit board 11. Preferably, the electronic component 15 is located inside the lens base 14, so as to avoid exposing the electronic component 15. Alternatively, in an example in which the lens holder 14 is integrally bonded to at least a portion of the circuit board 11 and/or the non-photosensitive region of the photosensitive chip 12, the lens holder 14 can embed the electronic component 15.

In addition, with continued reference to fig. 2-3B, the photosensitive assembly 10 further includes a filter 16, which may be, but is not limited to, an ir cut filter, wherein the filter 16 is attached to the inner side of the top surface of the lens holder 14 to maintain the photosensitive path of the filter 16 on the photosensitive chip 12, so that the incident light can reach the photosensitive chip 12 through the light channel 141 of the lens holder 14 after being filtered by the filter 16.

In this specific example of the image capturing module of the present invention shown in fig. 1 to 6B, the lens assembly 20 is a group lens, the lens assembly 20 is attached to the outside of the top surface of the lens holder 14, and the variable focal length lens device 30 is integrated inside the lens assembly 20 to maintain the light sensing path of the variable focal length lens device 30 to the light sensing chip 12 of the light sensing assembly 10 by the lens assembly 20.

For example, the lens assembly 20 includes a top lens 21 and a bottom lens 22, the bottom side of the lens barrel of the top lens 21 and the top side of the lens barrel of the bottom lens 22 are attached to each other, the variable focal length lens device 30 is disposed between the top lens 21 and the bottom lens 22 to integrate the variable focal length lens device 30 inside the lens assembly 20, wherein the bottom side of the lens barrel of the bottom lens 22 of the lens assembly 20 is attached to the outside of the top surface of the lens holder 14 such that incident light can reach the light sensing chip 12 of the light sensing assembly 10 after passing through the top lens 21, the variable focal length lens device 30 and the bottom lens 22, respectively, to be photoelectrically converted by the light sensing chip 12 for imaging. The camera module is capable of achieving zooming by changing the optical power of the variable focal length lens device 30. In addition, in the process of changing the focal power of the variable focal length lens device 30 to realize the zooming of the camera module, the height dimension of the camera module is not increased, so that the portable electronic device (for example, a smart phone) does not need to reserve a space for zooming of the camera module, which is beneficial to the development of the portable electronic device towards the light and thin direction.

It should be noted that the manner in which the variable focal length lens device 30 is disposed between the top lens 21 and the bottom lens 22 is not limited in the image capturing module of the present invention, for example, referring to fig. 2, a cavity 221 may be disposed on the top side of the barrel of the bottom lens 22, and the variable focal length lens device 30 is disposed in the cavity 221 of the bottom lens 22, so that the variable focal length lens device 30 is disposed between the top lens 21 and the bottom lens 22.

Further, the top side of the barrel of the bottom lens 22 may further be provided with a plurality of glue dispensing grooves 222, and the glue dispensing grooves 222 are respectively connected to the cavities 221, wherein after the variable focal length lens device 30 is disposed in the cavities 221 of the bottom lens 22, glue dispensing is performed in the glue dispensing grooves 222 of the bottom lens 22 to form a plurality of glue bonding portions 40, and the glue bonding portions 40 connect the variable focal length lens device 30 and the barrel of the bottom lens 22, so that the variable focal length lens device 30 is reliably disposed in the cavities 221 of the bottom lens 22.

Alternatively, in other examples of the image capturing module of the present invention, the lens assembly 20 may be a unitary structure or a group lens, the variable focal length lens device 30 may be attached to an outer side of a top surface of the lens base 14, and the variable focal length lens device 30 may be attached to a top surface of a lens barrel of the lens assembly 20 to maintain a light sensing path of the variable focal length lens device 30 to the light sensing chip 12 of the light sensing assembly 10 by the lens assembly 20, such that incident light can reach the light sensing chip 12 of the light sensing assembly 10 after passing through the variable focal length lens device 30 and the lens assembly 20, respectively, to be photoelectrically converted by the light sensing chip 12 for imaging. By holding the photosensitive member 20 of the image pickup module between the variable focal length lens device 30 and the photosensitive member 10, aberration of an optical system of the image pickup module can be corrected so that an imaging effect of the image pickup module can be improved.

Referring to fig. 4A to 6B, the variable focal length lens device 30 includes a deformation portion 31, a fixed portion 32 and a movable portion 33, wherein the deformation portion 31 includes a light-transmitting film 311 and a high polymer 312, an incident surface 3121 of the high polymer 312 corresponds to a middle portion of the light-transmitting film 311, wherein the fixed portion 32 includes a base 321, the base 321 is located at an outer side of the high polymer 312, for example, the base 321 may surround the high polymer 312, a periphery of the light-transmitting film 311 is connected to a top side of the base 321, wherein the movable portion 33 includes a light-transmitting plate 331, the light-transmitting plate 331 is movably suspended at a bottom side of the base 321, and an exit surface 3122 of the high polymer 312 corresponds to the light-transmitting plate 331. When the light-transmitting plate 331 is driven to press the high polymer 312 along the optical axis toward the direction approaching the light-transmitting film 311, since the circumference of the light-transmitting film 311 is limited by the base 321, the middle portion of the light-transmitting film 311 is bent and deformed to be convex outward, and at this time, the light-transmitting film 311 changes and maintains the surface shape of the incident surface 3121 of the high polymer 312 to make the incident surface 3121 of the high polymer 312 convex, by which the variable focal length lens device 30 can provide the function of converging light.

Preferably, the incident surface 3121 of the high polymer 312 is bonded to the middle of the light-transmitting film 311. Preferably, the exit surface 3122 of the high polymer 312 is bonded to the light-transmitting plate 331. When the light-transmitting plate 331 is driven to press the high polymer 312 along the optical axis toward the direction approaching the light-transmitting film 311, since the circumference of the light-transmitting film 311 is limited by the base 321, the middle portion of the light-transmitting film 311 is bent and deformed to be convex outward, and at this time, the light-transmitting film 311 changes and maintains the surface shape of the incident surface 3121 of the high polymer 312 to make the incident surface 3121 of the high polymer 312 convex, by which the variable focal length lens device 30 can provide the function of converging light. Accordingly, when the light-transmitting plate 331 is driven to pull the high polymer 312 along the optical axis in a direction away from the light-transmitting film 311, since the periphery of the light-transmitting film 311 is restricted by the base 321, the middle portion of the light-transmitting film 311 is bent and deformed to be concave inward, and at this time, the light-transmitting film 311 changes and maintains the surface shape of the incident surface 3121 of the high polymer 312 to make the incident surface 3121 of the high polymer 312 concave, by which the variable focal length lens device 30 can provide a divergent light ray effect.

Preferably, the light-transmitting plate 331 is a flat glass to allow the light-transmitting plate 331 to have a good supporting force and a high transmittance to visible light.

It should be noted that the shape of the transparent plate 331 in the top view is not limited in the camera module of the present invention. For example, in this specific example of the image pickup module of the present invention shown in fig. 1 to 6B, the shape of the light-transmitting plate 331 in a plan view is a square shape with a cut angle. Alternatively, in other examples of the camera module of the present invention, the transparent plate 331 may have a square or circular shape in a top view.

It should be noted that the material of the light-transmitting film 311 is not limited in the camera module of the present invention, as long as it has a good bending property to change and maintain the surface shape of the incident surface 3121 of the polymer 312 and has a good light transmittance, for example, the light-transmitting film 311 may be a bendable glass film, so that the light-transmitting film 311 can change and maintain the surface shape of the incident surface 3121 of the polymer 312 when the middle portion of the light-transmitting film 311 is bent and deformed to be convex outwards or concave inwards.

It is worth mentioning that the polymer 312 is a polymer solid lens having a high refractive index, and the polymer 312 can provide a function of converging light or diverging light in the case that the incident surface 3121 of the polymer 312 is changed.

Preferably, the polymer 312 is a solid of revolution, and the optical axis of the image pickup module coincides with the central axis of the polymer 312, the central axis of the light-transmitting film 311, and the central axis of the light-transmitting plate 331, so that when the light-transmitting plate 331 is driven to move along the optical axis, the circumference of the incident surface 3121 of the polymer 312 can be uniformly deformed centering on the optical axis, thereby providing the image pickup module with a stable optical structure.

It should be noted that the shape of the base 321 of the fixing portion 32 is not limited in the camera module of the present invention. For example, in this particular example of the camera module of the present invention shown in fig. 1-6B, the base 321 is a box that may surround the polymer 312. Alternatively, in other examples of the camera module of the present invention, the base 321 is a ring, which may surround the polymer 312.

With continued reference to fig. 4A to 6B, the fixing portion 32 further includes a base material 322, the base material 322 has a base material through hole 3221, the periphery of the light-transmitting film 311 is attached to the base material 322, the base material through hole 3221 of the base material 322 corresponds to the middle portion of the light-transmitting film 311, wherein the base material 322 is disposed on the top side of the base 321, such that the periphery of the light-transmitting film 311 is connected to the top side of the base 321 through the base material 322.

When the light-transmitting plate 331 is driven to move along the optical axis to press or pull the high polymer 312, the base material 322 is used for limiting the position of the light-transmitting film 311 which is bent and deformed to be convex outwards or concave inwards, so that the surface shape of the incident surface 3121 of the high polymer 312 is allowed to be deformed according to a preset mode to realize the zooming of the camera module.

In other words, when the light-transmitting plate 331 is driven to move along the optical axis to press or pull the high polymer 312, the base material 322 allows only bending deformation of the light-transmitting film 311 at a position corresponding to the base material through hole 3221 of the base material 322, so as to allow deformation of the surface shape of the incident surface 3121 of the high polymer 312 in a preset manner to realize zooming of the image capturing module.

Preferably, the diameter size of the high polymer 312 is larger than the diameter size of the substrate perforation 3221 of the substrate 322, so that a portion of the incident end of the high polymer 312 can extend to the substrate perforation 3221 of the substrate 322 and be bonded to the light-transmitting film 311 at a position corresponding to the substrate perforation 3221 of the substrate 322, and the incident surface 3121 of the high polymer 312 is defined by the position of the light-transmitting film 311 corresponding to the substrate perforation 3221 of the substrate 322.

In other words, the incident end of the high polymer 312 is stepped, and has a boss 3123 and an abutment table 3124 surrounding the boss 3123, the boss 3123 protrudes from the abutment table 3124, wherein the abutment table 3124 of the high polymer 312 is blocked by the substrate 322 and is bonded to the light-transmitting film 311 at a position corresponding to the substrate perforation 3221 of the substrate 322 to allow the incident surface 3121 of the high polymer 312 to be formed on the surface of the boss 3123, wherein the abutment table 3124 of the high polymer 312 abuts against the substrate 322, such that when the light-transmitting plate 331 is driven to press the high polymer 312 along the optical axis in a direction approaching the light-transmitting film 311, the abutment table 3124 of the high polymer 312 is blocked by the substrate 322 and only allows the boss 3123 of the high polymer 312 to protrude outward, so as to allow the convex surface 311 to change the light-transmitting film 311 to maintain the focal length of the high polymer 312, thereby providing a converging lens 30.

It will be appreciated that the diameter of the boss 3123 of the high polymer 312 is smaller than the size of the substrate penetration 3221 of the substrate 322 to form a gap between the outer wall of the boss 3123 of the high polymer 312 and the inner wall of the substrate 322 while avoiding friction between the boss 3123 of the high polymer 312 and the substrate 322, which is advantageous not only in controlling the surface shape of the incident surface 3121 of the high polymer 312 but also in reducing the requirement for the driving force of the variable focal length lens device 30.

It should be noted that the shape of the substrate 322 in the top view is not limited in the camera module of the present invention. For example, in the specific example of the camera module of the present invention shown in fig. 1 to 6B, the shape of the substrate 322 in a plan view may be square, and the size of the substrate corresponds to the size of the base 321, so that the substrate 322 can be disposed on the top side of the base 321. Alternatively, in other examples of the camera module of the present invention, the shape of the substrate 322 in a top view may be circular.

Preferably, in the specific example of the camera module of the present invention shown in fig. 1 to 6B, the substrate 322 is made of a black opaque material, so as to prevent the incident light from entering the polymer 312 through the substrate 322 and reduce stray light. In other words, incident light is only allowed to enter the polymer 312 through the substrate perforations 3221 of the substrate 322. Optionally, in other examples of the camera module of the present invention, the surface of the substrate 322 is coated with a black coating to prevent incident light from entering the polymer 312 through the substrate 322 and reduce stray light.

With continued reference to fig. 4A to 6B, the variable focal length lens device 30 includes a driving portion 34, the driving portion 34 being configured to drive the light-transmitting plate 331 to press the high polymer 312 along the optical axis toward the direction approaching the light-transmitting film 311, and to drive the light-transmitting plate 331 to pull the high polymer 312 along the optical axis toward the direction away from the light-transmitting film 311, so that the optical power of the variable focal length lens device 30 is changed to realize zooming of the image pickup module.

Specifically, the driving part 34 includes at least one coil 341 and at least one magnet 342, the position of the coil 341 corresponds to the position of the magnet 342, wherein one of the coil 341 and the magnet 342 is disposed at the fixed part 32, and the other is disposed at the movable part 33, wherein when the coil 341 is powered to generate an electromagnetic field, the electromagnetic field generated by the coil 341 and the magnetic field of the magnet 342 can interact to drive the movable part 33 to move along the optical axis. For example, in this specific example of the image pickup module of the present invention shown in fig. 1 to 6B, the coil 341 is provided to the fixed portion 32, and the magnet 342 is provided to the movable portion 33. Alternatively, in other examples of the camera module of the present invention, the coil 341 may be provided to the movable portion 33, and the magnet 342 may be provided to the fixed portion 32, accordingly.

It is worth mentioning that the direction in which the driving portion 34 drives the movable portion 33 along the optical axis is correlated with the current direction of the coil 341 input to the driving portion 34. In other words, by controlling the direction of the current inputted to the coil 341 of the driving section 34, the direction in which the movable section 33 moves along the optical axis can be controlled so as to change the plane shape of the incident surface 3121 of the high polymer 312 in a preset manner to realize zooming of the image pickup module.

In this specific example of the camera module of the present invention shown in fig. 1 to 6B, the driving part 34 includes one coil 341 and four magnets 342, wherein each side of the light-transmitting plate 331 of the movable part 33 is provided with one magnet 342, the coil 341 surrounds the four magnets 342 to allow the four magnets 342 to correspond to four different positions of the coil 341, respectively, so that when the coil 341 is powered to generate an electromagnetic field, the coil 341 and the four magnets 342 can cooperate with each other to apply a force uniformly around the light-transmitting plate 331 of the movable part 33 to drive the light-transmitting plate 331 to move along an optical axis to control the polymer 312 to deform uniformly centering on the optical axis, thereby providing the camera module with a stable optical structure.

Further, referring to fig. 5A and 5B, the fixing portion 32 includes four winding posts 323, the four winding posts 323 integrally extend downward from four corners of the base 321, respectively, wherein the coil 341 is wound around the four winding posts 323 to arrange the coil 341 at the fixing portion 32. Preferably, the four winding posts 323 integrally extend downward from the inner sides of the four corners of the base 321, so that after the coil 341 is wound around the four winding posts 323 and the coil 341 is disposed on the fixing portion 32, the outer wall of the coil 341 can be flush with the outer wall of the base 321, so as to avoid the coil 341 protruding from the outer wall of the base 321.

The driving portion 34 includes at least one magnetic conductive plate 343, wherein the magnetic conductive plate 343 is disposed on a side of the magnet 342 facing away from the coil 341, so as to reduce magnetic leakage of the magnet 342 and increase magnetic field strength of the magnet 342, thereby facilitating an increase in driving force of the driving portion 34.

In this specific example of the camera module of the present invention shown in fig. 1 to 6B, the driving part 34 includes four magnetic conductive plates 343, and the length and width dimensions of each magnetic conductive plate 343 are identical to those of the magnet 342, so that each magnet 342 and the magnetic conductive plate 343 can be disposed in a one-to-one correspondence.

In some embodiments of the camera module of the present invention, the magnet 342 and the magnetic conductive plate 343 may be attached to each other, for example, the magnet 342 and the magnetic conductive plate 343 may be attached to each other by glue, wherein each side of the light-transmitting plate 331 of the movable portion 33 is connected to a side of the magnetic conductive plate 343 facing away from the magnet 342, for example, the side of the light-transmitting plate 331 and the magnetic conductive plate 343 may be connected to each other by glue, so that one of the magnets 342 may be provided on each side of the light-transmitting plate 331.

In other embodiments of the camera module of the present invention, the magnet 342 and the magnetic conductive plate 343 may be molded and encapsulated to form a molded body outside the magnet 342 and the magnetic conductive plate 343, and the molded body may be attached to the side of the light-transmitting plate 331 by, but not limited to, glue, so that one magnet 342 may be disposed on each side of the light-transmitting plate 331.

Referring to fig. 6A, when an electromagnetic field is generated from the coil 341 by inputting a current in one direction to the coil 341, the interaction between the electromagnetic field generated from the coil 341 and the magnetic field of each of the magnets 342 can drive the light-transmitting plate 331 to press the high polymer 312 along the optical axis toward the direction approaching the light-transmitting film 311, and when the base 321 limits the periphery of the light-transmitting film 311, the boss 3123 of the high polymer 312 protrudes toward the light-transmitting film 311 to bend and deform the middle portion of the light-transmitting film 311 to protrude outward, and at this time, the light-transmitting film 311 changes and maintains the surface shape of the incident surface 3121 of the high polymer 312 to make the incident surface 3121 of the high polymer 312 convex, so that the variable focal length lens device 30 can provide a converging light effect.

Referring to fig. 6B, when an electric current in the other direction is input to the coil 341 to generate an electromagnetic field, the interaction between the electromagnetic field generated by the coil 341 and the magnetic field of each magnet 342 can drive the light-transmitting plate 331 to pull the high polymer 312 along the optical axis in a direction away from the light-transmitting film 311, and when the base 321 limits the periphery of the light-transmitting film 311, the boss 3123 of the high polymer 312 is recessed inward to bend and deform the middle portion of the light-transmitting film 311 to be recessed inward, and at this time, the light-transmitting film 311 changes and maintains the surface shape of the incident surface 3121 of the high polymer 312 to make the incident surface 3121 of the high polymer 312 concave, so that the variable focal length lens device 30 can provide a light-dispersing effect.

Fig. 7 shows a modified example of the variable focal length lens device 30 of the image pickup module of the present invention, unlike the variable focal length lens device 30 shown in fig. 4A to 6B, in this specific example of the variable focal length lens device 30 shown in fig. 7, the peripheral edge of the light-transmitting film 311 is directly attached to the surface of the base 321. In other words, the fixed portion 32 of the variable focal length lens device 30 shown in fig. 7 does not need to provide the base material 322.

Fig. 7 shows a modified example of the variable focal length lens device 30 of the image pickup module of the present invention, unlike the variable focal length lens device 30 shown in fig. 4A to 6B, in this specific example of the variable focal length lens device 30 shown in fig. 7, the base material 322 is located on the upper side of the light-transmitting film 311, and when the driving portion 34 drives the light-transmitting plate 331 to press the high polymer 312 in a direction approaching the light-transmitting film 311 along the optical axis, the boss 3123 of the high polymer 312 can make the middle portion of the light-transmitting film 311 protrude toward the base material perforation 3221 of the base material 322, at which time the light-transmitting film 311 changes and maintains the surface shape of the incident surface 3121 of the high polymer 312 to make the incident surface 3121 of the high polymer 312 convex, so that the variable focal length lens device 30 can provide a converging light effect.

Fig. 9 shows a modified example of the variable focal length lens device 30 of the image pickup module of the present invention, unlike the variable focal length lens device 30 shown in fig. 4A to 6B, in this specific example of the variable focal length lens device 30 shown in fig. 9, the coils 341 of the driving section 34 and the magnets 342 are in one-to-one correspondence.

Specifically, the driving part 34 includes four coils 341 and four magnets 342, wherein each side of the light-transmitting plate 331 of the movable part 33 is provided with one magnet 342, and each corresponding position of each magnet 342 is provided with one coil 341, so that when each coil 341 is supplied with power to generate an electromagnetic field, the electromagnetic field generated by each coil 341 and the magnetic field of each magnet 342 interact to be able to uniformly apply force around the light-transmitting plate 331 of the movable part 33 to drive the light-transmitting plate 331 to move along the optical axis. By controlling the magnitude and direction of the current input to each of the coils 341, the driving part 34 can drive the light-transmitting plate 331 of the movable part 33 to translate, tilt or rotate, so as to realize anti-shake of the camera module.

Fig. 10 shows a modified example of the variable focal length lens device 30 of the image pickup module of the present invention, unlike the variable focal length lens device 30 shown in fig. 9, in this specific example of the variable focal length lens device 30 shown in fig. 10, each corner of the light-transmitting plate 331 of the movable portion 33 is provided with a magnet 342, and each corresponding position of each magnet 342 is provided with a coil 341, so that when each coil 341 is supplied with power to generate an electromagnetic field, the electromagnetic field generated by each coil 341 and the magnetic field of each magnet 342 interact to be able to uniformly apply force around the light-transmitting plate 331 of the movable portion 33 to drive the light-transmitting plate 331 to move along the optical axis. By controlling the magnitude and direction of the current input to each of the coils 341, the driving part 34 can drive the light-transmitting plate 331 of the movable part 33 to translate, tilt or rotate, so as to realize anti-shake of the camera module.

It will be appreciated by persons skilled in the art that the above embodiments are examples only, wherein the features of the different embodiments may be combined with each other to obtain an embodiment which is readily apparent from the disclosure of the invention but which is not explicitly indicated in the drawings.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are by way of example only and are not limiting. The objects of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been shown and described in the examples and embodiments of the invention may be modified or practiced without departing from the principles described.

Claims (14)

1. A variable focal length lens apparatus comprising:

a driving section;

a deformation portion, wherein the deformation portion includes a light-transmitting film and a high polymer, an incident surface of the high polymer corresponding to a middle portion of the light-transmitting film;

a fixing portion, wherein the fixing portion includes a base located outside the high polymer, wherein a periphery of the light-transmitting film is connected to a top side of the base; and

and a movable portion, wherein the movable portion includes a light-transmitting plate that is drivably connected to the driving portion in such a manner as to be suspended from a bottom side of the base, wherein an exit surface of the high polymer corresponds to the light-transmitting plate.

2. The variable focal length lens device of claim 1, wherein the incidence surface of the high polymer is bonded to the middle of the light-transmitting film.

3. The variable focal length lens device of claim 2, wherein the exit face of the polymer is adhesively attached to the light-transmitting plate.

4. A variable focal length lens device according to claim 3, wherein the fixed portion comprises a substrate having a substrate perforation, wherein a peripheral edge of the light transmissive film is attached to the substrate, the substrate perforation of the substrate corresponding to a middle portion of the light transmissive film, wherein the substrate is disposed on a top side of the base to allow the peripheral edge of the light transmissive film to be connected to the top side of the base through the substrate.

5. The variable focal length lens device of claim 4, wherein the substrate is a black opaque material; or the surface of the substrate is coated with a black coating.

6. The variable focal length lens device of claim 4, wherein the incident end of the high polymer has a boss and an abutment surrounding the boss, the boss protruding from the abutment, wherein the boss of the high polymer extends to the substrate perforation of the substrate and is bonded to the middle of the light-transmitting film, the abutment of the high polymer abutting against the substrate.

7. A variable focal length lens device according to claim 3, wherein the substrate is located on an upper side of the light transmissive film.

8. A variable focal length lens device as claimed in claim 3, wherein the light transmissive film is directly attached to the top side of the base.

9. The variable focal length lens device according to any one of claims 1 to 8, wherein the driving portion includes a coil and a magnet, a position of the coil and a position of the magnet correspond, and one of the coil and the magnet is provided to the base and the other is provided to the light-transmitting plate.

10. A variable focal length lens device as claimed in claim 9, wherein the driving part comprises one of the coils and four of the magnets, one of the magnets being provided on each side of the light-transmitting plate, the coil surrounding the outer sides of the four magnets.

11. A variable focal length lens device according to claim 9, wherein the driving section includes four of the coils and four of the magnets, one of the magnets being provided on each side of the light-transmitting plate, and one of the coils being provided on an outer side of each of the magnets.

12. A variable focal length lens device according to claim 9, wherein the driving section includes four of the coils and four of the magnets, one of the magnets being provided at each corner of the light-transmitting plate, and one of the coils being provided outside each of the magnets.

13. The variable focal length lens device according to claim 9, wherein the driving portion includes a magnetically permeable plate provided on a side of the magnet facing away from the coil.

14. The module of making a video recording, its characterized in that includes:

a photosensitive assembly;

a lens assembly, wherein the lens assembly is held in a photosensitive path of the photosensitive assembly; and

a variable focus lens device as claimed in any one of claims 1 to 13, wherein the variable focus lens device is held in the photosensitive path of the photosensitive assembly.