CN218830404U - Shading structure for camera module and camera module - Google Patents

Abstract

A shading structure for a camera module comprises a shell, a lens, a light source and a light-transmitting piece; the lens and the light source are respectively arranged in the inner cavity of the shell, the lens is used for collecting optical signals of an external environment, and the light source is used for supplementing light of the external environment; the light-transmitting piece is positioned between the lens and the light source and the object to be shot, and the lens and the light source face the light-transmitting piece; the shading structure is used for blocking light rays emitted by the light source from entering the lens, and the shading structure for the camera module is characterized in that the light-transmitting piece is provided with a groove for embedding the shading structure; the shading structure is embedded into the groove of the light-transmitting piece so as to block a path that light rays emitted by the light source directly enter the lens through the light-transmitting piece.

Description

Shading structure for camera module and camera module

Technical Field

The utility model relates to a can prevent effectively that parasitic light from getting into shading structure and the module of making a video recording that camera lens module was used.

Background

With the economic development, the trend of automobile automation and intellectualization makes the vehicle-mounted camera module more important. Drivers increasingly rely on vehicle-mounted cameras to perform driving assistance, such as blind zone detection, collision early warning, automatic driving, in-cabin monitoring and the like. The number of cameras mounted on automobiles is increasing, and the design requirement for the reliability of the vehicle-mounted camera is increasing.

The infrared camera module is one of the existing commonly used vehicle-mounted camera modules. This kind of camera is often used for inside the driver's cabin, because the driver's cabin is inside dim, generally needs the infrared lamp light filling, but the parasitic light that infrared light produced in case through optical filter or other printing opacity spare part reflection or refraction shine into the camera inside will cause the not clear scheduling problem of image, cause the control discernment inaccurate.

In order to solve the problem of stray light interference and improve the imaging quality of the camera, chinese patent CN215219714U discloses a three-eye face recognition module, wherein a plurality of openings are formed in a shielding case, and the camera and a light supplement lamp are respectively arranged in different openings, so that the interference of part of stray light on the camera is avoided. Meanwhile, a protective transparent optical layer made of transparent glass or transparent plastic is attached to the front end of the shielding case facing the object to be shot, and the protective transparent optical layer is arranged to cover the opening where the camera is located. According to the scheme, the shading shielding cover and the protective transparent optical layer are of split structures, the structures are relatively complex, and the protective transparent optical layer is not arranged in front of the light supplement lamp, so that the light supplement lamp is more easily scratched or abraded, and dust prevention and water prevention are not facilitated.

If all cover protection transparent optical layer at the front end of camera, light filling lamp, then the light that the light filling lamp sent makes a round trip to reflect between two surfaces of the body of the interior layer after the inside layer body that gets into protection transparent optical layer to finally refraction gets into the camera, and then influences imaging quality.

Chinese patent CN209845094U discloses a "camera lens and a camera", in which a decorative sheet is provided on the front side of the lens and the light source facing the object to be photographed, the decorative sheet includes a sheet body made of a light-shielding material, and a lens hole corresponding to the lens and a light-transmitting portion corresponding to the light source are provided on the sheet body. At this time, the light emitted by the light source can pass through the light-transmitting part but can be cut off at the edge of the light-transmitting part, and the light cannot be conducted in the thickness space of the sheet body because the sheet body is made of the shading material. However, in this scheme, no optical filter is installed at the front side of the lens, which is not beneficial to isolating stray light in the external environment, and the imaging quality is greatly affected.

Therefore, in the related art, it is a problem to provide a filter on the lens and the front side, and to prevent stray light from being transmitted in a thickness space of the filter, thereby ensuring image quality.

Reference to the literature

Patent document 1: CN215219714U

Patent document 2: CN209845094U

Disclosure of Invention

An object of the utility model is to provide a can prevent effectively that parasitic light from getting into the shading structure that the module of making a video recording of camera lens was used. In order to achieve the above object, one aspect of the present invention is a light shielding structure for a camera module, wherein the camera module includes a housing, a lens, a light source, and a light-transmitting member; the lens and the light source are respectively arranged in the inner cavity of the shell, the lens is used for collecting optical signals of an external environment, and the light source is used for supplementing light of the external environment; the light-transmitting piece is positioned between the lens and the light source and the object to be shot, and the lens and the light source face the light-transmitting piece; the shading structure is used for blocking light rays emitted by the light source from entering the lens, and the shading structure for the camera module is characterized in that the light-transmitting piece is provided with a groove for embedding the shading structure; the shading structure is embedded into the groove of the light-transmitting piece so as to isolate the path of light emitted by the light source directly entering the lens through the light-transmitting piece.

According to the technical scheme, the light emitted by the light source can be prevented from directly entering the lens through the thickness space of the light-transmitting piece through the processes of refraction, reflection and the like, and stray light interference is reduced.

In a preferred mode, a projection of the light shielding structure on a cross section perpendicular to the optical axis of the lens is at least partially located between the lens and a projection of the light source on the cross section.

According to the technical scheme, the shading structure can block the interference of the light emitted from the light source to the lens.

In a preferred mode, a projection of the light shielding structure on a cross section perpendicular to an optical axis of the lens surrounds a projection of the lens and/or the light source on the cross section.

According to the technical scheme, the shading structure can better block the interference of the light emitted from the light source to the lens.

In a preferred mode, a projection of the light shielding structure on a cross section perpendicular to an optical axis of the lens has an opening.

According to the technical scheme, the light shading effect is guaranteed, and meanwhile materials and processing cost can be saved.

In a preferred mode, the groove of the light-transmitting member for the light-shielding structure to be embedded in is a blind hole or a through hole structure.

According to the technical scheme, the shading structure can enter the thickness space of the light-transmitting piece through the groove matched connection with the light-transmitting piece, and further more stray light is blocked.

In a preferred mode, the light-transmitting member is integrally formed with the light shielding structure.

According to the technical scheme, the light-transmitting piece and the shading structure can be connected more firmly, the processing is also convenient, the efficiency is improved, and the cost is saved.

In a preferred mode, the light shielding structure is directly fixedly connected with the shell or integrally formed with the shell.

According to the technical scheme, the shading structure and the shell can be connected more firmly, so that the stability of the shading structure is enhanced, the shading structure is also convenient to process, the efficiency is improved, and the cost is saved.

In a preferred mode, the light-transmitting member is a filter which can transmit only light of a specific wavelength.

According to the technical scheme, ambient stray light can be filtered, and light with specific wavelength is allowed to enter the lens.

Furthermore, another aspect of the present invention is a camera module, comprising:

a housing having an interior chamber; the lens is arranged in the inner cavity of the shell and used for acquiring optical signals of an external environment; the light source is arranged in the inner cavity of the shell and used for supplementing light to the external environment; the light-transmitting piece is positioned between the lens and the light source and the object to be shot, and the lens and the light source face the light-transmitting piece; the camera module is characterized by comprising the shading structure.

According to the technical scheme, stray light can be effectively prevented from directly entering the lens through the light-transmitting piece, and the imaging quality is further improved.

Drawings

In order to more clearly illustrate the present invention, the drawings of the present application will be described and illustrated. It is apparent that the drawings in the following description illustrate only some aspects of some exemplary embodiments of the invention, and that other drawings may be derived therefrom by those skilled in the art without the exercise of inventive faculty.

Fig. 1 is a general cross-sectional view of an exemplary module.

Fig. 2 is a general sectional view of a module of an example conventional technique.

Fig. 3 is a top view of an exemplary module in which a light shielding structure partially surrounds a camera lens.

Fig. 4 is a cross-sectional view of a module illustrating the recess as a hat blind hole.

FIG. 5 is a cross-sectional view of an exemplary module having a stepped blind recess.

Fig. 6 is a cross-sectional view of a module illustrating a groove as a via structure.

Fig. 7 is a cross-sectional view of a module in a case where an end portion of an exemplary light shielding structure is of a concave-convex type.

Fig. 8 is a cross-sectional view of a module in which an exemplary light shielding structure is integrally formed with a housing.

Description of the figures:

200-camera module, 100-shell, 1-first shell, 2-second shell, 3-lens, 4-ray, 5-shading structure, 6-light source, 7-light-transmitting piece, 71-first surface, 72-second surface, 73-groove, 8-first circuit board, 9-second circuit board, 10-arrow direction, 20-shell window

200 '-camera module, 1' -first shell, 2 '-second shell, 3' -lens, 4 '-light, 5' -shading structure, 6 '-light source, 7' -light-transmitting piece, 8 '-first circuit board, 9' -second circuit board, 10 '-arrow direction, 20' -shell window

Detailed Description

Various exemplary embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: unless otherwise indicated, the relative arrangement of components and steps, numerical expressions and numerical values, etc., set forth in these embodiments should be construed as merely illustrative, and not a limitation.

The use of the word "comprising" or "comprises" and the like in this disclosure is intended to mean that the elements listed before the word encompass the elements listed after the word and does not exclude the possibility that other elements may also be encompassed.

All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

For components, specific models of components, and like parameters, interrelationships between components, and control circuitry not described in detail in this section, can be considered techniques, methods, and apparatus known to those of ordinary skill in the relevant art, but where appropriate, should be considered as part of the specification.

(Module overall structure)

First, the overall structure of the present invention and the technical problem to be solved will be described with reference to fig. 1 and 2. Fig. 1 is a general sectional view of a module, and fig. 2 is a general sectional view of a module of a conventional art.

As shown in fig. 1, as an embodiment, the housing 100 of the camera module 200 is formed by mutually splicing a first housing 1 and a second housing 2, and the first housing 1 and the second housing 2 may be connected by various connecting methods such as clamping, bonding, welding, and the like. In addition, the housing 100 may also be an integrated structure, or may be formed by splicing three or more housings, which is not the main point of the present technical solution and is not described herein in detail.

As an embodiment, the lens 3 and the light source 6 are disposed in the inner cavity of the housing 100, and the front end of the lens 3 for collecting light and the front end of the light source 6 for emitting light are both disposed substantially toward the object. In a general example, the light source 6 is mainly used as a fill-in light to enhance the light intensity of the object to be shot and its surrounding environment, so as to ensure that the lens 3 can still work normally in a complex lighting environment or a dark environment. For example, when the light source 6 is an infrared fill-in light, infrared light is emitted to illuminate the object, and the infrared light is diffusely reflected and received by the lens 3 to form an image.

For simplicity, unless otherwise specified, the direction toward the subject along the optical axis of the lens 3 is referred to herein as the front, and the opposite direction is referred to herein as the rear.

As an embodiment, the second housing 2 is provided with a housing window 20 at the front side of the lens 3 and the light source 6, and on a cross section perpendicular to the optical axis of the lens 3, the projections of the lens 3 and the light source 6 are both located within the projection of the housing window 20, so as to avoid the shielding of the wall of the second housing 2 from the incoming and outgoing light rays.

As an embodiment, the light-transmitting member 7 has substantially the same shape and size as the housing window 20, and is fixedly connected to the housing window 20 by bonding, welding or other connecting methods, which are not limited herein. At this time, the light-transmitting member 7 covers the lens 3 and the light source 6, i.e., the lens 3 and the light source 6 are disposed facing the light-transmitting member 7, as viewed from the direction of the subject toward the image pickup module. The light-transmitting piece 7 can transmit light, can prevent the lens 3 and the light source 6 from being mistakenly touched to cause stain or abrasion in the using process, has dustproof and waterproof effects, and further enhances the performance stability of electronic components such as the lens 3 and the light source 6.

Preferably, the light-transmitting member 7 is provided as a filter, such as an infrared filter, for transmitting light of a set wavelength. Therefore, stray light in the external environment can be filtered through the light-transmitting member 7, and only light with a specific wavelength in the external environment, such as infrared light, is allowed to enter the lens 3, so that the imaging quality is improved. Taking an infrared filter as an example, the light-transmitting member 7 may be made of an optical glass coating or colored glass, or may be made of a special plastic such as PC or PMMA, which absorbs or reflects visible light and allows only infrared light to pass through.

The light-transmitting member 7 is generally in a plate-like form, and has a first surface 71 close to the lens 3 and a second surface 72 close to the object, and an inner plate of the light-transmitting member 7 is sandwiched between the first surface 71 and the second surface 72, so that the light-transmitting member 7 has a certain thickness space in the front-rear direction.

As an embodiment, the inner cavity of the casing 100 is further provided with a first circuit board 8 and a second circuit board 9, and the first circuit board 8 is electrically connected with the light source 6 for supplying power to the light source 6. The second circuit board 9 is electrically connected to the lens 3, and is generally disposed at a rear end of the lens 3 for converting the optical signal collected by the lens 3 into an electrical signal. It is to be understood that the arrangement of the circuit boards is not limited to the above-described manner, and one or more circuit boards may be provided as long as the functions of supplying power to the light source 6 and converting the optical signal collected by the lens 3 into an electrical signal are realized. Since the arrangement of the circuit board is not the key point of the technical scheme, redundant description is omitted here.

In the using process, light emitted by the light source 6 can penetrate through the light-transmitting piece 7 to irradiate towards a shot object, so that the effects of supplementing light for an external environment and enhancing the imaging effect of the lens 3 are achieved. However, since the first surface 71 and the second surface 72 of the light-transmitting member 7 are generally smooth, in practice, the first surface 71 or the second surface 72 may be coated for better light filtering effect, so that part of the light is reflected back and forth between the first surface 71 and the second surface 71 after entering the inner plate body of the light-transmitting member 7.

Specifically, according to the principle of light reflection, when light travels from one medium to an interface of another medium, a part of the light returns to the original medium, and the propagation direction of the light is changed. The light 4, as shown in fig. 1, enters the inner plate of the light-transmitting member 7 from the first surface 71, and then continues to travel to reach the second surface 72. At this time, a part of the light 4 passes through the second surface 72 and then exits from the light-transmitting member 7, but a part of the light 4 is reflected from the second surface 72, i.e. obliquely emitted to the first surface 71, and then continues to be reflected toward the second surface 72 after reaching the first surface 71, and the above-mentioned process is repeated to form a wave-like light path as shown in fig. 1. In the reflection process of the wavy light path, part of the reflected light can be refracted towards the lens 3 through the first surface 71, and the refracted light can easily enter the lens 3, so that the imaging effect is disturbed.

In addition, in the case where the first surface 71 and the second surface 72 are not coated, light is reflected at the boundary between the first surface 71 and the second surface 72 of the light-transmitting member 7 and air, and a light path similar to a wave shape is formed as shown in fig. 1.

Next, a light shielding structure of the conventional art is explained with reference to fig. 2.

As shown in fig. 2, the light shielding structure 5 'is disposed around the lens 3' and can block most of the light emitted from the light source 6 'from entering the lens 3'. However, since the light shielding structure 5' abuts against the first surface 71' of the light-transmitting member 7' and the inner plate of the light-transmitting member 7' is not embedded, only light directly reaching the light shielding structure 5' from the light source 6' can be blocked, and light entering the inner plate of the light-transmitting member 7' and reflected back and forth between the first surface 71' and the second surface 72' cannot be blocked.

Thus, after entering the inner plate of the light-transmitting member 7', the light 4' is continuously reflected between the first surface 71 'and the second surface 72' and finally reaches the position corresponding to the lens 3 'through the inner plate of the light-transmitting member 7'. At this time, part of the light is refracted through the first surface 71 'toward the lens 3', and the refracted light may enter the front end of the lens 3 'in the direction of the arrow 10', thereby disturbing the imaging effect.

That is to say, the shading structure of the conventional technology cannot solve the problem that the light 4' directly reflects back and forth on the inner plate body of the light-transmitting member 7' and finally refracts into the lens 3', and in use, stray light inevitably enters the lens 3' through the light-transmitting member 7', so that imaging blur is caused.

In order to solve the above problem faced by the conventional technology, as shown in fig. 1, the light shielding structure 5 is embedded into the inner plate of the light-transmitting member 7, so as to block the stray light entering the inner plate of the light-transmitting member 7. At this time, after the light 4 enters the inner plate of the light-transmitting member 7, the light is reflected back and forth between the first surface 1 and the second surface 2, but when the light 4 reaches the light shielding structure 5, the light 4 is blocked and reflected by the light shielding structure 5, and finally exits in the direction of the arrow 10, so that the path of the light 4 directly entering the lens 3 through the inner plate of the light-transmitting member 7 is blocked.

(light-shielding structure)

Next, the light shielding structure of the present invention will be described with reference to fig. 3 to 7.

Fig. 3 is a top view of a module in which a light shielding structure partially surrounds a camera lens. Fig. 4 is a cross-sectional view of the module with the recess being a hat blind hole. FIG. 5 is a cross-sectional view of a module having a stepped recess with a blind hole. Fig. 6 is a cross-sectional view of a module in which the recess is a via structure. Fig. 7 is a cross-sectional view of the module when the end of the light shielding structure is of a concavo-convex type.

First, the relative positional relationship between the light shielding structure 5, the lens 3, and the light source 6 will be described.

The projection of the light-shielding structure 5 on a section perpendicular to the optical axis of the lens 3 is located at least partially between the lens 3 and the projection of the light source 6 on this section, so that light emitted from the light source 6 is blocked from being directed towards the lens 3. In other words, at least a part of the light shielding structure 5 is disposed between the lens 3 and the light source 6 in the top view shown in fig. 3.

As an example, as shown in fig. 3, the projection of the light shielding structure 5 on the cross section perpendicular to the optical axis of the lens 4 surrounds the projection of the lens 3 on the cross section. It is understood that the light shielding structure 5 may be circular, elliptical, rectangular, arc-shaped, polygonal, etc. in top view, and the light shielding structure 5 may be closed or opened as shown in fig. 3, as long as the opening is not directed toward the light source 6. The arrangement of the opening does not influence the shading effect, can also save materials and processing cost, and enhances the structural strength of the light-transmitting piece 7.

Furthermore, the light-shielding structure 5 can also be arranged around the light source 6, either in a closed or in an open loop. Alternatively, the light shielding structure 5 can surround the light source 6 and the lens 3, such as an S-shaped or infinity shaped in top view, all of which can achieve the light shielding effect

It will be appreciated that the light-shielding structure 5 is not limited to the above-mentioned circular pattern, and may be provided as a straight plate between the lens 3 and the light source 6, for example, and may also shield most of the stray light, although the light-shielding effect may be weaker than the circular pattern. For simplicity, the following description will be made only by taking the surround pattern as an example.

As an embodiment, the light shielding structure 5 is configured to extend from the light transmissive member 7 in a direction along the optical axis of the lens 3 toward the second circuit board 9 provided at the rear end of the lens 3. It should be noted that the light shielding structure 5 may extend backward to a position abutting against the second circuit board 9, or may extend only a part of the distance to have a certain distance from the second circuit board 9, but at least the light shielding structure 5 extends backward to pass over the front ends of the lens 3 and the light source 6, so as to prevent the light emitted from the light source 6 from directly entering the lens 3. This scheme has saved material and processing cost.

The light shielding structure 5 may be made of various non-light-transmitting materials, including but not limited to metal materials, mixed materials of metal and non-metal, etc., as long as it can shield stray light.

Next, the connection manner of the groove 73 and the light shielding structure 5 will be described.

As an embodiment, as shown in fig. 4, the light-transmitting member 7 is opened with a groove 73 opened toward the light source 6 for the light shielding structure 5 to be inserted, and the groove 73 is recessed from the first surface 71 toward the second surface 72 in a direction substantially perpendicular to the first surface 71. In the top view shown in fig. 3, the groove 73 has a shape and a size corresponding to the light shielding structure 5 so as to be fittingly coupled with the light shielding structure 5.

As an example, the groove 73 is a blind hole structure, and the side walls 731 and 732 of the groove 73 may be parallel to each other and substantially perpendicular to the first surface 71, or as shown in fig. 4, the side walls 731 and 732 intersect at an inclined angle, so that the cross section of the groove 73 is substantially hat-shaped. In addition, the groove 73 may also be a stepped pattern of the side walls 731 and 732 shown in fig. 5, which is more convenient for machining, for example, when machining is performed by using laser, a layer is excavated on the first surface 71 by using a laser beam with a larger diameter, then the diameter of the laser beam is reduced, and a layer is further dug deep on the basis of the track of the first layer, and then the diameter of the laser beam is reduced continuously, and a layer is further dug deep on the basis of the track of the second layer, so that the groove 73 with a stepped cross section can be dug back and forth. The cross-sectional shape of the groove 73 is not limited to the above-mentioned ones, and is not listed here.

As a blind hole structure, the depth of the groove 73 in the vertical direction of the first surface 71 cannot be too shallow. If too shallow, a large spacing remains between the front end of the groove 73 facing the subject and the second surface 2, from which spacing part of the stray light still passes back and forth reflectively and finally refracts into the lens 3. The optimum value of the depth of the groove 73 needs to be obtained in practice through repeated calculations and experiments.

In fact, the groove 73 may also be a through hole structure, that is, the groove 73 penetrates through the first surface 71 and the second surface 72 of the light-transmitting member 7. As shown in fig. 6, after the light shielding structure 5 is embedded in the groove 73, the front end surface of the light shielding structure 5 facing the object to be photographed is flush with the second surface 72, so that a better light shielding effect can be achieved, the problem that when the groove 73 is a blind hole structure, part of stray light is reflected back and forth between the front end of the blind hole 73 and the second surface 2 is avoided, but the problem that the structural strength of the light-transmitting member 7 is reduced due to the through hole pattern is also easily caused.

In addition, as an embodiment, the end of the embedding groove 73 of the light shielding structure 5 may be a continuous end, or may be a discontinuous concave-convex pattern arranged at intervals like a battlement opening of a city wall, and in this case, the general cross-sectional view of the camera module 200 may be a pattern in which a part of the light shielding structure 5 is shielded by the groove 73, as shown in fig. 7.

The connection between the light shielding structure 5 and the light-transmitting member 7 includes, but is not limited to, glue bonding, thermal compression, welding, etc. In fact, the light shielding structure 5 and the light-transmitting member 7 may also be integrally formed, and the forming process includes, but is not limited to, two-color injection molding, metal powder forming, 3D printing, machining, and the like. These are conventional technical means and will not be described in detail herein.

Next, the connection relationship between the light shielding structure 5 and the housing 100 will be described with reference to fig. 1 and 8. Fig. 8 is a cross-sectional view of a module in which the light shielding structure is integrally formed with the housing.

As shown in fig. 1, the light shielding structure 5 may be provided separately from the housing 100, and as an embodiment, the light shielding structure 5 is fixedly connected to the light-transmitting member 7, and the light-transmitting member 7 is fixedly connected to the housing 100, so that an indirect connection relationship is formed between the light shielding structure 5 and the housing 100.

As another example, as shown in fig. 8, the light shielding structure 5 may be directly fixedly connected to the housing 100 or integrally formed with the housing 100. The connection manner of the light shielding structure 5 and the housing 100 includes, but is not limited to, two-color injection molding, glue bonding, hot pressing, welding, etc.

The light shielding structure 5 is directly fixed to or integrally formed with the housing 100, so that the light shielding structure 5 is more stable and firmer in the vibration environment of the vehicle. And light-transmitting member 7 also with casing window 20 fixed connection, can make also being connected more firmly between light-shielding structure 5 and the light-transmitting member 7 like this, make light-shielding structure 5 more difficult to take off from the recess 73 of light-transmitting member 7, be favorable to increasing overall structure's stability, and then the effect of reinforcing shading. In fact, the housing 100, the light shielding structure 5, and the light-transmitting member 7 can be integrally formed, so that the module structure is firmer, and the imaging quality is more stable.

It should be understood that the above-mentioned embodiments are only used for explaining the present invention, the protection scope of the present invention is not limited thereto, and any person skilled in the art can change, replace, combine the technical solution of the present invention and the inventive concept thereof within the technical scope of the present invention.

Claims (9)

1. A shading structure for a camera module comprises a shell, a lens, a light source and a light-transmitting piece;

the lens and the light source are respectively arranged in the inner cavity of the shell, the lens is used for collecting optical signals of an external environment, and the light source is used for supplementing light of the external environment;

the light-transmitting piece is positioned between the lens and the light source and the object to be shot, and the lens and the light source face the light-transmitting piece;

the shading structure is used for blocking the light emitted by the light source from entering the lens,

the shading structure for the camera module is characterized in that,

the light-transmitting piece is provided with a groove for embedding the shading structure;

the shading structure is embedded into the groove of the light-transmitting piece so as to block a path that light rays emitted by the light source directly enter the lens through the light-transmitting piece.

2. The shading structure for the camera module according to claim 1, wherein:

the projection of the light shielding structure on a section perpendicular to the optical axis of the lens is at least partially located between the lens and the projection of the light source on the section.

3. The shading structure for a camera module according to claim 2, wherein:

and the projection of the light shielding structure on the section perpendicular to the optical axis of the lens surrounds the projection of the lens and/or the light source on the section.

4. A light shielding structure for a camera module according to claim 3, wherein:

the projection of the shading structure on the section perpendicular to the optical axis of the lens is provided with an opening.

5. The shading structure for the camera module according to claim 1, wherein:

the groove of the light-transmitting piece, which is used for embedding the shading structure, is a blind hole structure or a through hole structure.

6. The shading structure for the camera module according to claim 1, wherein:

the light-transmitting piece and the shading structure are integrally formed.

7. The shading structure for the camera module according to claim 1, wherein:

the shading structure is directly fixedly connected with the shell or integrally formed.

8. The shading structure for the camera module according to claim 1, wherein:

the light-transmitting piece is a filter which can only transmit light with specific wavelength.

9. A camera module, comprising:

a housing having an interior chamber;

the lens is arranged in the inner cavity of the shell and used for acquiring optical signals of an external environment;

the light source is arranged in the inner cavity of the shell and used for supplementing light to the external environment;

the light-transmitting piece is positioned between the lens and the light source and the object to be shot, and both the lens and the light source face the light-transmitting piece;

the camera module is characterized in that,

a light-shielding structure according to any one of claims 1 to 8.

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