CN107544108B

CN107544108B - Filter element, camera module, manufacturing method and application thereof

Info

Publication number: CN107544108B
Application number: CN201610487336.4A
Authority: CN
Inventors: 王江平; 范秋林; 毛狄青
Original assignee: Ningbo Sunny Opotech Co Ltd
Current assignee: Ningbo Sunny Opotech Co Ltd
Priority date: 2016-06-23
Filing date: 2016-06-23
Publication date: 2020-12-18
Anticipated expiration: 2036-06-23
Also published as: CN107544108A

Abstract

The optical filter element is used for a camera module and comprises a curved main body, and the curved main body has refraction and filtering functions on light rays so as to replace a lens of the camera module.

Description

Filter element, camera module, manufacturing method and application thereof

Technical Field

The invention relates to the field of camera modules, in particular to a light filtering element, a lens, a camera module, a manufacturing method and application thereof.

Background

Along with the development of various intelligent equipment, the application range of the module of making a video recording is more and more extensive, and the function and the structure of the module of making a video recording in return also influence intelligent equipment.

Multi-functional, frivolous are one of the present main development trend of numerous smart machine, can be under the condition of the module function of making a video recording constantly optimizes, but a bottleneck problem has appeared: the traditional camera module structure can not meet the requirement of lightness and thinness. Therefore, the thickness and the volume of the camera module become important factors limiting the implementation of the smart device, for example, the thickness of the mobile phone depends on the thickness of the camera module to a great extent.

A conventional camera module generally includes a circuit board, a photosensitive chip, a base, a filter and a lens. The photosensitive chip is attached to the circuit board and connected through a gold thread to realize photoelectric signal transmission between the photosensitive chip and the circuit board. The optical filter is installed on a photosensitive path of the photosensitive chip through the base. The lens is directly arranged on the base or is arranged on the base through a motor, so that the lens is positioned on a photosensitive path of the photosensitive chip.

Obviously, the thickness of the camera module depends on the number of components, the volume of each component, the connection relationship between the components, and other factors. From the above structure, the sum of the heights of the components of the circuit board, the base and the lens is the minimum thickness of the camera module.

In the camera module, a lens and a filter are essential components in an optical system. After entering the lens, the light reaches the optical filter through the refraction of the lens, and further filters partial light, such as infrared light, through the filtering of the optical filter, so that the image accords with the visual effect of human eyes. Here, the lens and the filter each assume different functions and each occupy a certain space. On the basis of the traditional structure, the lens and the optical filter have almost no space which can be reduced on the basis of meeting the optical imaging effect.

In addition, there are two main types of conventional filters, one is a reflective filter, and the other is an absorptive filter. The reflective filter, such as an infrared cut-off filter, uses the reflection of light on a film to intercept infrared light by plating an infrared cut-off film on the surface of white glass, so that the infrared light does not enter a space in a lens to perform a photoelectric conversion process. The effect of reflection is related to the angle of incidence of the light rays, and as the angle of incidence increases, the light filtering effect of the light rays, for example, at the edge of the lens, becomes worse. Absorptive filters, such as blue glass filters, use light absorbing materials in the blue glass material to control the wavelength of the incident light. Although the blue glass is relatively better than the infrared cut-off filter in terms of optical effect, the processing technology of the flaky blue glass is difficult at that time, and the processing efficiency is low, so that the practical application rate of the blue glass in the camera module is low.

Disclosure of Invention

An object of the present invention is to provide a filter element, a lens and a camera module, and a method for manufacturing the same and an application thereof, wherein the filter element has a refraction function of a lens and can be used as the lens.

An object of the present invention is to provide a filter element, a lens and an image pickup module, and a method of manufacturing and application thereof, in which the filter element has a lens-like structure, thereby forming a filter element having a combination of a refraction function and a filtering function.

An object of the present invention is to provide a filter element, a lens and a camera module, and a method of manufacturing and an application thereof, wherein the filter element can be applied to a lens to form a lens having a filtering effect.

An object of the present invention is to provide a filter element, a lens and a camera module, and a method for manufacturing the same and an application thereof, wherein the filter element can replace a lens of the lens instead of the lens, so that the spatial positions of the filter and the lens are combined, the height formed by the filter and the lens is reduced, and the longitudinal height of the camera module is reduced.

An object of the present invention is to provide a filter element, a lens and a camera module, and a method for manufacturing the same and an application thereof, wherein the filter element forms a curved surface structure so as to simulate a lens structure.

An object of the present invention is to provide a filter element, a lens and a camera module, and a method for manufacturing the same and an application thereof, wherein the filter element filters light by absorption, thereby having a better light filtering effect and less influence of a light incident angle.

An object of the present invention is to provide a filter element, a lens and a camera module, and a method for manufacturing the same and an application thereof, wherein the filter element has a curved main body and a film layer attached to the surface of the curved main body to increase the light function of the curved main body.

An object of the present invention is to provide a filter element, a lens and a camera module, which are reduced in thickness by combining reduction of the thickness of a lens portion and reduction of the thickness of a photosensitive member portion, so as to form an ultra-thin camera module, and a method of manufacturing and use thereof.

To achieve the above objects and other objects and advantages of the present invention, a filter element for a camera module includes a curved body for refracting and filtering light to replace a lens of the camera module.

According to an embodiment of the invention, the filter element filters light in an absorptive manner.

According to an embodiment of the invention, the filter element is absorptive for filtering the infrared light.

According to an embodiment of the invention, the curved body of the filter element is made of a blue glass material.

According to an embodiment of the present invention, the filter element includes a film layer attached to an outer surface of the curved body.

According to an embodiment of the present invention, the film layer of the filter element is a combination of: one or both of a cut-off film and an antireflection film.

According to an embodiment of the present invention, in the optical filter element, the cut-off film is an infrared cut-off film, and the antireflection film layer is a visible light antireflection film.

According to an embodiment of the invention, the film layer of the filter element is attached to the curved body by spraying, brushing or attaching.

Another aspect of the invention provides a lens for a camera module, which includes

At least one of the filter elements; and

and the filter element is arranged on the lens barrel.

According to an embodiment of the present invention, the lens barrel includes at least one lens, and the lens is mounted in the lens barrel and located above the filter element.

Another aspect of the present invention provides a camera module, which includes:

at least one lens;

at least one photosensitive component; and

at least one said filter element, said filter element and said lens are located in the photosensitive path of said photosensitive assembly.

According to an embodiment of the present invention, the camera module includes a bracket, and the bracket is mounted with the photosensitive assembly.

According to an embodiment of the present invention, the lens of the camera module is mounted on the bracket to form a fixed focus camera module.

According to an embodiment of the present invention, the bracket of the camera module is integrally connected to the photosensitive element.

According to an embodiment of the present invention, the camera module comprises a motor, the motor is mounted on the bracket, and the lens is mounted on the motor, so as to form a moving-focus camera module.

According to an embodiment of the present invention, the photosensitive assembly of the camera module includes a photosensitive element and a circuit board element, and the circuit board element is connected to the photosensitive element in a bonding manner.

According to an embodiment of the present invention, the photosensitive element of the camera module includes a photosensitive portion and a non-photosensitive portion, the non-photosensitive portion and the circuit board element each include at least one conductive unit, and the non-photosensitive portion and the circuit board element are electrically connected to each other through the corresponding conductive unit, so that the circuit board element is electrically connected to the non-photosensitive portion of the photosensitive element.

According to an embodiment of the present invention, the line board element of the camera module includes a connector electrically connected to the line board element, so that the photosensitive assembly is electrically connected to an electronic device when the photosensitive assembly is applied to the electronic device.

According to an embodiment of the present invention, the photosensitive element of the camera module includes a functional layer attached below the photosensitive element.

According to an embodiment of the present invention, the functional layer in the camera module is a metal plating layer.

According to an embodiment of the present invention, the conductive unit in the camera module is an anisotropic conductive film.

According to an embodiment of the present invention, the camera module includes a plurality of lenses, a plurality of photosensitive elements and a plurality of filter elements, forming an array camera module.

Another aspect of the present invention provides a method for manufacturing a filter element, including the steps of:

grinding a glass material to form a curved main body, or injection molding a curved main body by a transparent resin material, or die casting a transparent resin to form a curved main body on the basis of glass, thereby forming a filter element which has refraction and filtration functions on light and can replace a lens of a camera module.

According to the requirement, the method also comprises the following steps: and a film layer is attached to the outer surface of the curved surface main body.

According to an embodiment of the present invention, in the manufacturing method of the filter element, the glass material is blue glass.

According to an embodiment of the present invention, in the method for manufacturing the filter element, the curved body filters the infrared light in an absorptive manner.

According to an embodiment of the present invention, in the method for manufacturing the filter element, the film layer is a combination of: one or two of an infrared cut film and a visible light antireflection film.

According to an embodiment of the invention, in the manufacturing method of the filter element, the film layer is disposed on the curved main body by spraying, brushing or attaching.

Drawings

Fig. 1 is a perspective view of a camera module according to a first preferred embodiment of the present invention.

Fig. 2 is a schematic sectional view of a camera module according to a first preferred embodiment of the present invention.

Fig. 3 is an exploded view of a camera module according to a first preferred embodiment of the present invention.

Fig. 4 is a perspective view of a filter element of a camera module according to a first preferred embodiment of the present invention.

Fig. 5 is a schematic side view of a filter element of a camera module according to a first preferred embodiment of the invention.

Fig. 6 is a schematic diagram of the light action process of the camera module according to the first preferred embodiment of the invention.

Fig. 7 is a first manufacturing method of a filter element of a camera module according to a first preferred embodiment of the present invention.

Fig. 8 is a second manufacturing method of a filter element of a camera module according to the first preferred embodiment of the present invention.

Fig. 9 is a third manufacturing method of a filter element of a camera module according to the first preferred embodiment of the present invention.

Fig. 10 is a schematic sectional view of a camera module according to a second preferred embodiment of the present invention.

Fig. 11 is an exploded view of a camera module according to a second preferred embodiment of the present invention.

Fig. 12 is a perspective view of a camera module according to a third preferred embodiment of the present invention.

Fig. 13 is a schematic sectional view of a camera module according to a third preferred embodiment of the present invention.

Fig. 14 is an exploded view of a camera module according to a third preferred embodiment of the present invention.

Fig. 15 is an exploded view of a photosensitive assembly of a camera module according to a third preferred embodiment of the invention.

Fig. 16 is a perspective view of a camera module according to a fourth preferred embodiment of the present invention.

Fig. 17 is a schematic sectional view of a camera module according to a fourth preferred embodiment of the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.

As shown in fig. 1 to 9, a camera module according to a first preferred embodiment of the present invention. The camera module includes a photosensitive assembly 10, a bracket 20, a filter element 30, a lens 40 and a motor 50.

The bracket 20 is mounted to the photosensitive assembly 10, and the filter element 30 is mounted to the bracket 20 such that the filter element 30 is located in a photosensitive path of the photosensitive assembly 10. The lens 40 is mounted on the motor 50, the motor 50 is mounted on the bracket 20, so that the lens 40 is located in the photosensitive path of the photosensitive assembly 10, and the lens 40 can be adjusted by the motor 50, thereby forming a Focus-adjustable moving-Focus Camera module afcm (active Focus Camera model). That is to say, pass through the in-process of the image is gathered to the module of making a video recording, pass through by the light of gathering the target reflection the camera lens 40 gets into inside the module of making a video recording, light passes through the refraction effect of camera lens 40, and the refraction of filter element 30, the filtering effect reach photosensitive assembly 10 carry out the sensitization effect, through photosensitive assembly 10 realizes photoelectric conversion to accomplish the collection of target image, and at the in-process of gathering, can adjust through adjusting motor 50 the focus of the module of making a video recording, so that acquire predetermined target image.

It should be noted that, in this embodiment of the present invention, the moving Focus Camera module AFCM is taken as an example for illustration, and in other embodiments of the present invention, the Camera module may also be a fixed Focus Camera module ffcm (fix Focus Camera model). That is, the motor 50 is not required, and the lens 40 is directly mounted to the holder 20, thereby forming a fixed focal length camera module. It will be understood by those skilled in the art that the type of camera module is not a limitation of the present invention.

The photosensitive component 10 includes a photosensitive element 11 and a circuit board element 12, and the photosensitive element 11 is attached to the circuit board element 12. Further, the photosensitive element 11 is electrically connected to the circuit board element 12 through at least one connection line. For example, the connecting wire may be a gold wire, a silver wire or a copper wire. The photosensitive element 11 may be a photosensitive chip, such as a CCD or CMOS chip. The material of the wiring Board member 12 may be PCB (Printed Circuit Board), FPC (flexible Printed Circuit Board), or RF (Printed Flex).

That is to say, in the process of image acquisition, light incident on the lens 40 reaches the photosensitive element 11 to perform a photosensitive action after passing through the optical actions of the lens 40 and the filter element 30, and converts an optical signal into an electrical signal to be transmitted to the circuit board element 12, and further, the electrical signal is transmitted to an application device of the camera module, such as a mobile phone, a notebook computer, and a tablet computer, through the restoration of the application device, so that the acquired object is presented in the form of an image.

The lens 40 includes a lens barrel 41 and at least one lens 42, the lens 42 is mounted on the lens barrel 41, and a central optical axis of the lens 42 is coincident with a central axis of the photosensitive assembly 10.

Referring to fig. 4, 5 and 6, the filter element 30 includes a curved body 31, and the curved body 31 is in a lens shape, so that light is refracted by the curved body 31 when passing through the curved body 31. The curved body 31 has a filtering function, that is, light is filtered when passing through the curved body 31. That is, the curved body 31 has a dual function of filtering and refracting light, so that when light passes through the curved body 31, the light is filtered and refracted. Further, the filter element 30 has a light refracting function in conformity with the lens 42, so that the curved body 31 can function as the lens 42. In other words, the curved body 31 refracts light rays in the manner of the lens 42 and filters some of the light rays. That is, the curved body 31 corresponds to a conventional combination of a lens and a filter.

By way of example and not limitation, the curved body 31 has the effect of filtering infrared light. That is, when a light ray including infrared light passes through the curved main body 31, the infrared light is filtered and refracted. Of course, in other embodiments, the curved main body 31 may also have other light filtering functions, such as visible light or predetermined wavelength bands.

Further, according to this embodiment of the present invention, the curved body 31 filters light therein in an absorptive manner. In other words, when the light passes through the curved body 31, a part of the light is refracted and then emitted, and a part of the light is absorbed and cannot be emitted.

By way of example and not limitation, the curved body 31 may be a blue glass curved body to facilitate the absorption of infrared light by the blue glass material.

It should be noted that the conventional ir cut filter blocks the transmission of infrared light by reflection, and has strong dependence on the incident angle of light and the thickness of the reflective film, and only when the thickness of the optical film layer is 1/4 of the incident wavelength, the reflectivity is the largest, and since the incident angle is not smaller than the critical angle and the wavelength to be filtered is a range value, and the thickness of the reflective film is set according to the central wavelength, the reflectivity of the light at the edge is slightly worse. And the interception effect of the reflecting film on infrared light can generate larger deviation along with the change of the incident angle. This kind of condition makes, in the image of the collection of traditional camera module, causes the red edge color shading phenomenon that takes place in the image center. And the reflective filtering is easy to generate secondary imaging of reflected light, thereby forming halo or ghost phenomenon. According to the embodiment of the invention, the infrared light is filtered in an absorption mode, so that the defects can be effectively prevented, the dependence on the light incidence angle is small, the problems of color chips and parasitic light ghost can be prevented, and the color of the shot image is softer and more natural.

Referring to fig. 4, further, according to this embodiment of the present invention, the filter element 30 includes a film 32, and the film 32 is attached to the curved body 31 to enhance the function of the filter element 30 on light.

According to this embodiment of the present invention, the film 32 is an antireflection film or a cut-off film. For example, the film 32 may be an infrared cut film, or the film 32 may be a visible light antireflection film. Of course, the film layer 32 is not limited to a functional film. That is, the film layer 32 may be one kind of film, or may be a combination of a plurality of films, such as a combination of an antireflection film and a cut-off film. In particular, in the implementation process, the film layer 32 may be disposed on the surface of the curved main body 31 by spraying or brushing. In other embodiments of the present invention, the film layer 32 may not be disposed, for example, the curved main body 31 is disposed on a blue glass curved main body, and the refraction of light is realized through a lens-shaped curved structure, and the lens itself has an infrared light filtering function, so as to realize dual functions of a lens and a filter.

It is worth mentioning that the number of the film layers 32 is not limited to one layer, and may be two, three or more layers.

It should be noted that, as can be seen from the above description, the filter element 30 has dual functions of a lens and a filter, and filters light while refracting the light, so that the filter element 30 can replace one of the lenses 42 in the lens 40, thereby reducing the number of the lenses 42 in the lens 40, and reducing the height of the camera module. For example, the lens 40 in the original camera module is composed of 5 lenses 42, and after the original optical filter is replaced by the optical filter element 30 of the present invention, the lenses 42 of the lens 40 may only need 4 lenses to achieve the refraction and filtering effects of the original lens and optical filter on light, so that the height of the lens barrel 41 is reduced, and the height of the camera module is reduced, thereby being conveniently applied to various ultra-thin electronic devices, such as mobile phones, tablet computers, notebook computers, wearable devices, and the like.

Referring to fig. 7, further, according to the above preferred embodiment of the present invention, the present invention provides a method 1000 for manufacturing a filter element, including the steps of:

1100: grinding a glass material to form a curved main body 31; and

1200: a film 32 is attached to the outer surface of the curved main body 31.

In step 1100, the curved main body 31 is in the shape of a lens, and has a refraction function consistent with that of the lens for light. The glass material has an absorbing effect on light, for example, infrared light, and is exemplified by, but not limited to, blue glass.

The film layer 32 is exemplified by, but not limited to, an infrared cut film or a visible light reflection reducing film.

Further, in the step 1200, the film layer 32 may be attached to the curved main body 31 by spraying, brushing, or attaching.

Referring to fig. 8, according to the above preferred embodiment of the present invention, the present invention provides another manufacturing method 2000 of a filter element, comprising the steps of:

2100: injection molding a curved body 31 through a transparent resin material; and

2200: a film 32 is attached to the outer surface of the curved main body 31.

In step 2100, the curved body 31 has a lens-like structure and has a refractive effect on light rays consistent with a lens. The transparent resin material has a light absorbing effect, for example, an absorbing effect on infrared light.

Further, in step 2200, the film layer 32 may be attached to the curved body 31 by spraying, brushing, or attaching.

Referring to fig. 9, according to the above preferred embodiment of the present invention, the present invention provides a method 3000 for manufacturing another filter element, comprising the steps of:

3100: on a glass basis, transparent resin is die-cast to form a curved main body 31; and

3200: a film 32 is attached to the outer surface of the curved main body 31.

In step 3100, the curved body 31 has a lens 42-like structure with a refractive effect on light consistent with a lens. The glass and the transparent resin material form the curved main body 31 having an absorption effect on light, for example, infrared light. The glass is exemplified by, but not limited to, blue glass.

Further, in the step 3200, the film layer 32 may be attached to the curved body 31 by spraying, brushing or attaching.

Referring to fig. 6, according to the above preferred embodiment of the present invention, the present invention provides a light transmission method, which includes the steps of: transmits light rays refractively and absorptively. By such a light transmission method, the effect of light after passing through the lens 42 and the filter in succession is simulated, so that the two processes of action are combined together, rather than in a gradual manner. That is, absorption and refraction are performed simultaneously, rather than refraction first and then absorption. And by means of such light transmission mode, can carry out the improvement of structure to the module of making a video recording of using the light transmission principle.

As shown in fig. 10 and 11, a camera module according to a second preferred embodiment of the present invention. The camera module comprises the photosensitive assembly 10, the bracket 20, a lens 40B and the motor 50.

The bracket 20 is mounted to the photosensitive assembly 10, the lens 40B is mounted to the motor 50, the motor 50 is mounted to the bracket 20, so that the lens 40B is located in a photosensitive path of the photosensitive assembly 10, and the lens 40B can be adjusted by the motor 50, thereby forming a Focus-adjustable afcm (active Focus Camera model). That is to say, in the process of collecting images through the camera module, light reflected by a collected target enters the camera module through the lens 40B, the light reaches the photosensitive assembly 10 through refraction and filtering of the lens 40B to perform a photosensitive action, photoelectric conversion is realized through the photosensitive assembly 10, so that collection of target images is completed, and in the collecting process, the focal length of the camera module can be adjusted through adjusting the motor 50, so as to obtain a predetermined target image.

It should be noted that, in this embodiment of the present invention, the moving Focus Camera module AFCM is taken as an example for illustration, and in other embodiments of the present invention, the Camera module may also be a fixed Focus Camera module ffcm (fix Focus Camera model). That is, the motor 50 is not required, and the lens 40B is directly mounted to the holder 20, thereby forming a fixed focal length camera module. It will be understood by those skilled in the art that the type of camera module is not a limitation of the present invention.

Unlike the above preferred embodiment, the lens 40A includes a lens barrel 41A and at least one filter element 30A, and the filter element 30A is mounted in the lens barrel 41A. The lens 40A includes a lens 42A, and the lens 42A is mounted on the lens barrel 41A and located above the filter element 30A. That is, the filter element 30A is used as a lens of the lens 40A and has a filtering function.

Consistent with the first preferred embodiment, the filter element 30A includes a curved body 31A, and the curved body 31A is in the shape of a lens, so that light rays are refracted by the curved body 31A when passing through the curved body 31A. The curved body 31A has a filtering function, that is, light is filtered when passing through the curved body 31A. That is, the curved body 31A has a dual function of filtering and refracting light, so that when light passes through the curved body 31A, the light is filtered and refracted. Further, the filter element 30A has a light refracting effect in conformity with the lens so that the curved body 31A can function as the lens 42A. In other words, the curved main body 31A refracts light in a lens manner and filters a portion of the light therein. That is, the curved body 31 corresponds to a conventional combination of a lens and a filter.

By way of example and not limitation, the curved body 31A has the effect of filtering infrared light. That is, when a light ray including infrared light passes through the curved main body 31A, the infrared light is filtered and refracted. Of course, in other embodiments, the curved main body 31A may also have other light filtering functions, such as visible light or predetermined wavelength bands.

Further, according to this embodiment of the present invention, the curved body 31A filters light therein in an absorptive manner. In other words, when the light passes through the curved body 31A, a part of the light is refracted and emitted, and a part of the light is absorbed and cannot be emitted.

By way of example and not limitation, the curved body 31A may be a blue glass curved body to facilitate the absorption of infrared light by the blue glass material.

Further, according to this embodiment of the present invention, the filter element 30A includes a film layer 32A, and the film layer 32A is attached to the curved body 31A to enhance the function of the filter element 30A on light.

According to this embodiment of the present invention, the film 32A is an antireflection film or a cut-off film. For example, the film 32A may be an infrared cut film, or the film 32A may be a visible light antireflection film. Of course, the film layer 32A is not limited to one functional film. That is, the film layer 32A may be one kind of film, or may be a combination of a plurality of films, such as a combination of an antireflection film and a cut-off film. In particular, in the implementation process, the film layer 32A may be disposed on the surface of the curved main body 31A by spraying or brushing. In other embodiments of the present invention, the film layer 32A may not be disposed, for example, the curved main body 31A is disposed on the blue glass curved main body 31A, and the refraction of light is realized through a lens-shaped curved structure, and the lens itself has an infrared light filtering function, so as to realize dual functions of a lens and a filter.

It is worth mentioning that the number of the film layer 32A is not limited to one layer, and may be two, three or more layers.

In other words, the conventional optical filter is removed, and the optical filter element 30A is disposed in the lens barrel 41A, so that the lens 40A becomes a lens 40A with light refraction and light filtering functions. In the process of assembling the camera module, the process of mounting the filter element 30A to the holder 20 is not required. Compared with the traditional camera module, the remote filter element can have dual functions of a lens and an optical filter, so that the space position occupied by the combination of the original optical filter and the lens is reduced, the overall height of the camera module is reduced, and the camera module is conveniently applied to ultrathin electronic equipment such as mobile phones, tablet computers, notebook computers and wearable equipment.

As shown in fig. 12 to 15, is a camera module according to a third preferred embodiment of the present invention. Unlike the first preferred embodiment, the camera module includes a photosensitive element 10B. The photosensitive assembly 10B includes a photosensitive element 11B and a circuit board element 12B. The wiring board element 12B is bonded to the photosensitive element 11B. Further, the wiring board member 12B is fixedly attached to the photosensitive element 11B so that the relative positions of the photosensitive element 11B and the wiring board member 12B do not change.

Further, the photosensitive element 11B has a front surface 111B and a back surface 112B with reference to fig. 15. The front surface 111B is a surface having a photosensitive function, the back surface 112B is a surface not having a photosensitive function, and when the camera module is assembled, the front surface 111B is opposite to the lens 40, and the back surface 112B is opposite to the lens 40. In particular, in this embodiment of the present invention, the wiring board member 12 is lapped on the front surface 111B of the photosensitive element 11B, that is, the photosensitive element 11B provides a supporting position for the wiring board member 12B during assembly.

Specifically, the photosensitive element 11B may be implemented as a photosensitive chip. Such as a CCD or CMOS.

In this embodiment of the present invention, the photosensitive member 10B includes a functional layer 13B to improve the performance of the photosensitive member 10B, such as heat dissipation performance, such as structural strength performance. Further, the functional layer 13B is attached to the back surface 112B of the photosensitive element 11B to improve the performance of the photosensitive element 11B. In particular, the functional layer 13B is implemented as a metal plating layer and is attached to the back surface 112B of the photosensitive element 11, thereby increasing the structural strength of the photosensitive element 11B and improving the heat dissipation performance of the photosensitive element 11B. In other embodiments of the present invention, the functional layer 13B may also be other types or structures of functional layers 13B, such as a metal plate. The functional layer 13B may also be provided integrally with the photosensitive element 11B and the wiring board member 12B, that is, is not limited to being provided to the photosensitive element 11B. In another embodiment of the present invention, the photosensitive member 10B may not be provided with the functional layer 13B. It should be understood by those skilled in the art that the type and the arrangement position of the functional layer 13B are not limitations of the present invention.

Further, the front surface 111B of the photosensitive element 11B includes a photosensitive portion 1111B and a non-photosensitive portion 1112B. The light-sensing portion 1111B is used for sensing light, and the non-light-sensing portion 1112B is used for signal processing. The non-photosensitive portion 1112B is located at the periphery of the photosensitive region. That is to say, in the process of image acquisition by the camera module, after the light enters the camera module, the light reaches the photosensitive portion 1111B of the photosensitive element 11B for sensitization through the refraction of the lens 40 and the filtering of the optical filter, and then the logic signal processing of the non-photosensitive portion 1112B completes the photoelectric conversion process, converts the light signal into the circuit signal, and realizes the signal acquisition of the image.

According to this embodiment of the present invention, the wiring board member 12B is overlapped on the non-photosensitive region of the photosensitive member 11B so as not to affect the photosensitive process of the photosensitive member 11B. That is, the wiring board element 12B is attached to the edge position of the photosensitive element 11B. For example, when the photosensitive element 11B has a square shape, the circuit board element 12B is overlapped along one side of the square shape.

Further, the non-photosensitive portion 1112B includes a wiring board connection region 11121B for electrically connecting the wiring board element 12B. That is, the wiring board connection region 11121B is provided at the edge position of the photosensitive element 11B, and the wiring board element 12 is electrically connected to the photosensitive element 11B through the wiring board connection region 11121B. That is, the wiring board element 12B and the photosensitive element 11B are electrically connected to each other while being structurally overlapped.

Referring to fig. 15, the wiring board member 12B includes a first wiring board portion 121B and a second wiring board portion 122B, and the second wiring board portion 122B is connected to the first connection portion. The first connecting portion is used for connecting the photosensitive element 11B, and the second circuit board portion 122B is used for connecting other circuit elements.

The first circuit board portion 121B includes a photosensitive connection portion 1211B for electrically connecting the photosensitive element 11B. The photosensitive connection region 1211B corresponds to the circuit board connection region 11121B, and forms an electrical connection structure for electrically connecting the photosensitive element 11B and the circuit board element 12B. That is, when the light sensing function is performed, the light sensing element 11B transmits a signal from the light sensing element 11B to the wiring board element 12B through the electrical connection structure formed by the light sensing connection region 1211B and the wiring board connection region 11121B.

Further, the wiring board connection region 11121B of the photosensitive element 11B and the photosensitive element 11B of the wiring board element 12B each include at least one

conductive element

111211B,12111B, the interconnection of the corresponding conductive elements serving to electrically connect the photosensitive element 11B and the wiring board element 12B. And the connection of the

conductive units

111211B,12111B makes the connection of the photosensitive element 11B and the circuit board element 12B have better conductivity in the longitudinal direction and better insulation in the transverse direction, i.e. selective conductivity. For example, the

Conductive units

111211B,12111B may be implemented as anisotropic Conductive film acf (anisotropic Conductive film), which has better conductivity in the direction perpendicular to the photosensitive element 11B and the circuit board element 12B, and better insulation in the direction parallel to the photosensitive element 11B and the circuit board element 12B. According to this embodiment of the present invention, the photosensitive element 11B and the wiring board element 12B each include a plurality of the conductive units 11211B,12111B correspondingly arranged along the edges of the photosensitive element 11B and the wiring board element 12B, respectively, to form the wiring board connection region 11121B and the photosensitive connection region 1211B, constituting the electrical connection structure.

For example, the

conductive elements

111211B,12111B may be implemented as stripe structures and arranged at intervals along one edge of the photosensitive element 11B and the wiring board element 12B, respectively, to form stripe-shaped corresponding wiring connection regions 11121B and photosensitive connection regions 1211B. Of course, in other embodiments of the present invention, the conductive elements 11211B,12111B may be arranged in other shapes and layouts, such as dot-shaped spacing arrangements, for example, square spacing layouts. It will be understood by those skilled in the art that the shape, layout and number of the conductive elements 111211B,121111B may be set as desired and are not a limitation of the present invention.

In the process of manufacturing the photosensitive assembly 10B, anisotropic conductive films may be respectively disposed on the circuit board connection region 11121B of the photosensitive element 11B and the photosensitive connection region 1211B of the circuit board element 12B, so that the photosensitive element 11B and the circuit board element 12B are electrically connected stably by the pressing.

The second circuit board portion 122B includes a connector 1221B for electrically connecting to other circuit components. That is, when the camera module is applied to other electronic devices, such as a mobile phone, a notebook computer, and a tablet computer, the connector 1221B is electrically connected to a component of the electronic device, so as to transmit information between the camera module and the electronic device, and transmit image information of the camera module to the electronic device. In this embodiment of the present invention, the connection is disposed at the same side as the photosensitive connection region 1211B, but in other embodiments, the connector 1221B may also be disposed at a different position, such as a position at a side different from the photosensitive connection region 1211B, and it should be understood by those skilled in the art that the type and the disposed position of the connector 1221B are not limitations of the invention.

In other words, the first connecting portion undertakes the electrical connection between the photosensitive element 11B and the circuit board element 12B, and the second connecting portion undertakes the connection between the camera module and other electronic devices, so that the light information collected by the lens 40 is converted into an electrical signal through the photosensitive element 11B, and then can be transmitted to the electronic device applied to the camera module through the circuit board element 12B.

The material of the first Circuit Board portion and the second Circuit Board portion 122B of the Circuit Board element 12B may be FPC (flexible Printed Circuit), PCB (Printed Circuit Board), or RF (Rigid Flex Circuit). The first circuit board portion 121B and the second circuit board portion 122B may be made of the same material, or may be made of different materials to be combined, for example, the first circuit board portion 121B is an FPC, and the second circuit board portion 122B is a PCB. Preferably, the first circuit board portion 121B is FPC, so as to match with the material of the photosensitive element 11, so that the circuit board element 12B and the photosensitive element 11B are firmly and stably connected. It should be noted that the type of material of the circuit board element 12B is only used as an example to illustrate the way that the invention can be implemented, and is not a limitation of the invention.

According to this embodiment of the present invention, the holder 20 is mounted to the photosensitive element 11B. That is, the photosensitive element 11B is not the wiring board element 12B, and serves as a mounting base for the holder 20, the filter element 30, the motor 50, and the lens 40. More specifically, the bracket 20 is mounted on the non-light-receiving portion 1112B of the light-receiving element 11B, surrounding the light-receiving portion 1111B. For example, the bracket 20 is assembled to the photosensitive element 11B by bonding or integral molding. It should be understood by those skilled in the art that the manner in which the bracket 20 is mounted is not a limitation of the present invention.

Further, in this embodiment of the present invention, one end of the photosensitive element 11B protrudes from the bracket 20 to form a visor 113B, so as to provide a mounting position for the circuit board. That is, the circuit board connection region 11121B of the photosensitive element 11 protrudes from the holder 20 to be located outside the holder 20. According to this embodiment of the present invention, two assembling manners of the camera module and the photosensitive assembly 10B are provided, in one assembling manner, the photosensitive assembly 10B is assembled first, that is, the photosensitive element 11B and the circuit board element 12B are assembled, for example, pressed, and then the optical filter is assembled to the bracket 20B, and then the bracket 20B is mounted to the photosensitive element 11B, and then the lens 40, the motor 50, and other components are mounted. In another assembly method, the components related to the lens 40 are assembled first, and then the photosensitive element 11B and the circuit board element 12B are assembled, that is, the components such as the bracket 20, the optical filter, the lens 40, and the motor 50 are assembled first, and then the circuit board element 12B is assembled on the visor 113B protruding from the bracket 20. For example, the filter may be assembled to the holder 20, the holder 20 may be mounted to the photosensitive element 11B, the lens 40 may be mounted to the motor 50, the motor 50 may be mounted to the holder 20, and the circuit board element 12B may be bonded to the photosensitive element 11B.

In the traditional camera module, the photosensitive chip is attached to the circuit board, and the photosensitive chip and the circuit board are electrically connected through a gold wire, so that the signal of the photosensitive chip is transmitted to the circuit board through the gold wire.

First, in the present invention, there is no need to provide gold wires, i.e., there is no need to perform a gold wire-making process during the assembly process, so that the production process is simplified, and there is no need to reserve gold wire positions in the space of the camera module. In other words, the gold thread position is not reserved on the inner side of the bracket 20, and the original gold thread position is changed into a position where the bracket 20 can be installed, so that the installation position of the bracket 20 is expanded, the possibility that the bracket 20 retracts inwards is provided, and the transverse size of the assembled camera module is reduced.

Next, the original gold wire is located inside the bracket 20, that is, in the optical system where the lens 40 is located, so that the light reflected by the gold wire becomes stray light to sense the imaging quality of the camera module. In the process of gold wire making, the residual dust and impurities can easily pollute the lens 40, and the imaging effect of the camera module is influenced.

Third, in the present invention, the camera module is assembled based on the photosensitive element 11B, not based on a wiring board, so that the influence of the wiring board on the camera module is reduced. For example, the circuit board is bonded to the front surface 111B side of the photosensitive element 11B, and does not participate in the thickness calculation of the camera module, so that the thickness of the camera module is reduced. For example, when AA (Active alignment) adjustment is performed, the consistency of the optical axes is achieved by directly adjusting the components such as the photosensitive chip, the holder 20, the motor 50, or the lens 40, so as to avoid the accumulated error caused by the circuit board. Therefore, the assembly based on the photosensitive element 11B brings improvements to the image pickup module in terms of both the structural size and the optical performance.

In summary, the camera module obtained according to the present invention provides further reduction in thickness and lateral dimension, meets the requirement of light and thin development of electronic devices, and is suitable for being applied to respective electronic devices, such as mobile phones, tablet computers, notebook computers, micro cameras, wearable devices, and the like. It should be understood by those skilled in the art that the application device and the application scenario of the camera module are not limitations of the present invention.

It is worth mentioning that according to this embodiment of the invention, the filter element 30 has both a refracting effect on the light and a light filtering effect, and therefore has the dual function of a lens 42 and a filter. When the lens is assembled in the camera module, the lens 42 in the lens 40 can be replaced while the original optical filter is replaced, so that the original height of the lens 40 is reduced, and the effect of reducing the thickness of the camera module is achieved. The curved filter is combined with the photosensitive assembly 10B in a lap joint mode, the thickness and the transverse size of the camera module are reduced from different aspects, and an ultrathin camera module can be easily obtained, so that the camera module is conveniently applied to various electronic equipment with light and thin requirements on size, such as mobile phones, notebook computers, tablet computers, miniature camera devices, wearable equipment and other electronic equipment.

As shown in fig. 16 and 17, is a camera module according to a fourth preferred embodiment of the present invention.

In this embodiment, the camera module is implemented as an array of camera modules. The array camera module comprises at least two camera modules, so that the image acquisition process is realized through the cooperation of the camera modules.

For convenience of explanation, an array camera module including two camera modules, i.e., a dual camera module, will be described as an example. The array camera module includes a photosensitive assembly 10C, two supports 20, two filter elements 30, two motors 50 and two lenses 40.

It should be noted that, for convenience of disclosure, in this embodiment of the present invention, the array camera module composed of two lenses 40 is taken as an example for illustration, while in other embodiments of the present invention, the number of the lenses 40 may be more, such as three or more, and it should be understood by those skilled in the art that the number of the lenses 40 and the number of the corresponding components, such as the motor 50, the bracket 20, and the number of the filters, are not limited by the present invention.

The photosensitive assembly 10C includes two photosensitive elements 11 and two circuit board elements 12, and the two circuit board elements 12 are electrically connected to the corresponding photosensitive elements 11 respectively. The two brackets 20 are respectively mounted on the photosensitive elements 11, and the two filter elements 30 are respectively mounted on the two brackets 20, so that the filter elements 30 are located in the photosensitive paths of the corresponding photosensitive elements 11. The two motors 50 are mounted on the bracket 20, and the two lenses 40 are respectively mounted on the two motors 50, so that the lenses 40 are respectively located on the photosensitive paths corresponding to the photosensitive elements 11, and the focal length of the camera module can be adjusted by the motors 50. In the process of image acquisition, light enters the two lenses 40, reaches the corresponding light filtering elements 30 after the refraction action of the two lenses 40, then reaches the photosensitive elements 11 through the refraction and filtering action of the light filtering elements 30, further converts optical signals into electric signals through the photosensitive action of the photosensitive elements 11, and further transmits the electric signals to applied electronic equipment through the circuit board elements 12, so that the acquisition of two groups of images is completed at one time, namely the shooting effect of the array module.

More specifically, in this embodiment of the invention, two of the wiring board elements 12 are integrally connected so as to form an array structure. That is, when the photosensitive assembly 10C is assembled, the circuit board element 12 can be connected to the photosensitive element 11 by one-time press-fitting.

In the process of assembling the array camera module, the circuit board element 12 is integrally mounted on the photosensitive element 11, the brackets 20 are mounted at the positions corresponding to the two circuit board elements 12, and the filters, the motors 50 and the lenses 40 are assembled on the brackets 20.

It should be noted that in this embodiment of the present invention, the two holders 20 are independent, that is, the lens 40, the filter element 30 and the motor 50 are in a one-to-one correspondence relationship with the holders 20, while in other embodiments, the lens 40, the filter element 30 and the motor 50 may share the holder 20, for example, a unitary holder 20 is formed, and the adjacent lens 40, the filter element 30 and the motor 50 may share a middle portion of the unitary holder 20, and it should be understood by those skilled in the art that the structural shape of the holder 20 is not a limitation of the present invention.

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

Claims

1. A filter element for a camera module, the camera module including a photosensitive component and a lens held on the photosensitive path of the photosensitive component, the lens comprises a lens cone and at least one lens arranged in the lens cone, the camera module comprises a bracket, the lens is mounted to the holder, or the lens is mounted to the holder by a motor, characterized in that the filter element is square, the filter element being adapted to be mounted to the holder, and the filter element includes a curved body so that the curved body having a filtering function on light rays has a refracting function on light rays, the curved body being formed of a blue glass material, the light filtering element is arranged between the lens barrel of the lens and the photosensitive assembly so as to cooperate with the at least one lens of the lens to form a light collecting system of the camera module.

2. The filter element of claim 1, wherein the filter element absorptively filters light.

3. The filter element according to claim 1, wherein the filter element is absorptive for infrared light.

4. The filter element according to any of claims 1 to 3, wherein said filter element comprises a film layer attached to an outer surface of said curved body.

5. The filter element of claim 4, wherein the film layer is a combination of: one or both of a cut-off film and an antireflection film.

6. The filter element according to claim 5, wherein the cut-off film is an infrared cut-off film, and the antireflection film layer is a visible light antireflection film.

7. The filter element according to claim 5, wherein the film layer is attached to the curved body by spraying, brushing or pasting.

8. A camera module, comprising:

the lens comprises a lens barrel and at least one lens arranged in the lens barrel;

at least one photosensitive component; and

the camera module comprises a support, the lens is mounted on the support, or the lens is mounted on the support through a motor, the filter element is square, the filter element is suitable for being mounted on the support and comprises a curved main body, so that the curved main body with the function of filtering light has a refraction effect on the light, and the curved main body is formed by a blue glass material, wherein the filter element is arranged between the lens barrel of the lens and the photosensitive assembly to match with the at least one lens of the lens to form a light collection system of the camera module.

9. The camera module of claim 8, wherein the filter element absorptively filters light.

10. The camera module of claim 8, wherein the filter element is absorptive to infrared light.

11. The camera module of any of claims 8-10, wherein the filter element comprises a film layer attached to an outer surface of the curved body.

12. The camera module of claim 11, wherein the film layer is a combination of: one or both of a cut-off film and an antireflection film.

13. The camera module of claim 12, wherein the cut-off film is an infrared cut-off film and the antireflective film layer is a visible light antireflective film.

14. The camera module of claim 12, wherein the film layer is attached to the curved body by spraying, brushing, or attaching.

15. The camera module of any of claims 8-10, wherein the bracket is mounted to an upper surface of a photosensitive element of the photosensitive assembly.

16. The camera module of any of claims 8-10, wherein the lens is mounted to the bracket to form a fixed focus camera module.

17. The camera module of any of claims 8-10, wherein the bracket is integrally connected to the photosensitive element.

18. The camera module of any of claims 8-10, wherein the motor is mounted to the frame and the lens is mounted to the motor so as to form a moving focus camera module.

19. The camera module of any of claims 8-10, wherein the photosensitive assembly includes a photosensitive element and a circuit board component, the circuit board component being attached to the photosensitive element.

20. The camera module according to claim 19, wherein the photosensitive member includes a photosensitive portion and a non-photosensitive portion, the non-photosensitive portion and the circuit board member each including at least one conductive unit, the non-photosensitive portion and the circuit board member being electrically connected to each other through the conductive unit, so that the circuit board member is electrically connected to the non-photosensitive portion of the photosensitive member.

21. The camera module of claim 20, wherein the circuit board member includes a connector electrically connected to the circuit board member so that the photosensitive assembly is electrically connected to an electronic device when applied to the electronic device.

22. The camera module of claim 20, wherein the photosensitive element includes a functional layer attached to a backside of the photosensitive element, the functional layer being a metal coating.

23. The camera module of claim 20, wherein the conductive element is an anisotropic conductive film.

24. The camera module of claim 20, wherein the plurality of lenses, the plurality of photosensitive elements, and the plurality of filter elements form an array camera module.

25. A method of manufacturing a filter element for use in manufacturing a filter element according to any one of claims 1 to 7, comprising the steps of: and grinding a glass material to form the curved main body so as to form the light filtering element.

26. The method of manufacturing a filter element according to claim 25, wherein the glass material is blue glass.

27. The method of manufacturing a filter element according to claim 25, wherein the curved body filters infrared light in an absorptive manner.

28. The method of manufacturing a filter element according to claim 25, further comprising the steps of: attaching a film layer to the outer surface of the curved surface main body, wherein the film layer is a combination of: one or two of an infrared cut film and a visible light antireflection film.

29. The method of claim 25, wherein the film is applied by spraying, brushing or pasting to the curved body.

30. A method of manufacturing a filter element according to any one of claims 1 to 7, wherein the filter element is formed from a blue glass material by a process of die-casting a transparent resin on a glass base to form the curved body to form the filter element.

31. The method of manufacturing a filter element according to claim 30, further comprising the steps of: attaching a film layer to the outer surface of the curved surface main body, wherein the film layer is a combination of: one or two of an infrared cut film and a visible light antireflection film.

32. The method of claim 30, wherein the curved body has an absorptive filtering effect on infrared light.