Camera module and terminal equipment

Abstract

The utility model relates to a camera module and terminal equipment. The camera module comprises a transparent lens; the lens assembly is arranged on one side of the inner surface of the transparent lens; the flash lamp is arranged on one side of the inner surface of the transparent lens, and the flash lamp and the lens assembly are arranged side by side; the antireflection film is attached to the outer surface of the transparent lens; wherein irradiation light emitted by the flash lamp sequentially passes through the transparent lens and the antireflection film, and reflected light generated on the transparent lens is reduced through the antireflection film. According to the embodiment of the invention, the anti-reflection film is arranged on the outer surface of the transparent lens, so that the problem of optical crosstalk of the lens assembly caused by reflection of the transparent lens during photographing based on a flash lamp can be improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of terminal device structures, and in particular to a camera module and a terminal device. BACKGROUND

[0002] Nowadays, many terminal devices are equipped with camera functions, and flashlights are increasingly applied in terminal devices, such as mobile phones, cameras, and tablet computers.

[0003] However, when the stacking space of the terminal device is limited, the flashlight is generally arranged close to the lens assembly, so that the irradiation light emitted by the flashlight is reflected multiple times through the outer transparent lens to form reflected light invading the lens assembly, causing light halo and causing the problem of light interference, which affects the imaging quality. UTILITARIAN CONTENT

[0004] To overcome the problems in the related art, the present disclosure provides a camera module and a terminal device. According to the present disclosure, a reflection-reducing film is arranged on the outer surface of the transparent lens, which can improve the problem of light interference caused by the reflection of the transparent lens on the lens assembly when taking pictures based on the flashlight.

[0005] According to a first aspect of an embodiment of the present disclosure, a camera module is provided; the camera module comprises:

[0006] a transparent lens;

[0007] a lens assembly arranged on one side of the inner surface of the transparent lens;

[0008] a flashlight arranged on one side of the inner surface of the transparent lens and arranged side by side with the lens assembly;

[0009] a reflection-reducing film attached to the outer surface of the transparent lens;

[0010] Wherein, the irradiation light emitted by the flashlight passes through the transparent lens and the reflection-reducing film in sequence, and the reflection-reducing film reduces the reflected light generated on the transparent lens.

[0011] In some embodiments, the reflection-reducing film comprises a plurality of first type film layers and a plurality of second type film layers; the refractive index of the first type film layer is less than a preset refractive index, and the refractive index of the second type film layer is greater than or equal to the preset refractive index;

[0012] Wherein, the first type film layers and the second type film layers are alternately stacked.

[0013] In some embodiments, the second type of film layer includes a plurality of first sub-film layers and at least two second sub-film layers; the refractive index of the first sub-film layer is greater than the refractive index of the second sub-film layer; the hardness of the second sub-film layer is greater than the hardness of the first type of film layer;

[0014] For a portion of the first type of film layer and a portion of the first sub-film layer, the first type of film layer and the first sub-film layer are alternately stacked in a direction away from the transparent lens;

[0015] At least two second sub-film layers are arranged on the side of all the first type of film layers away from the transparent lens;

[0016] For another portion of the second sub-film layer and another portion of the first sub-film layer, the second sub-film layer and the first sub-film layer are alternately stacked in a direction away from the first type of film layer.

[0017] In some embodiments, the first type of film layer includes a silicon oxide layer; the first sub-film layer includes a silicon nitride layer; and the second sub-film layer includes a silicon oxynitride layer.

[0018] In some embodiments, the anti-reflective film is sequentially stacked by a first silicon oxide layer, a first silicon nitride layer, a second silicon oxide layer, a second silicon nitride layer, a third silicon oxide layer, a third silicon nitride layer, a fourth silicon oxide layer, a fourth silicon nitride layer, a fifth silicon oxide layer, a fifth silicon nitride layer, a first silicon oxynitride layer, a sixth silicon nitride layer, and a second silicon oxynitride layer in a direction away from the transparent lens;

[0019] In some embodiments, the thickness of the first silicon oxide layer is between 5 nm and 15 nm; the thickness of the first silicon nitride layer is between 10 nm and 30 nm; the thickness of the second silicon oxide layer is between 18 nm and 53 nm; the thickness of the second silicon nitride layer is between 33 nm and 99 nm; the thickness of the third silicon oxide layer is between 62 nm and 185 nm; the thickness of the third silicon nitride layer is between 27 nm and 80 nm; the thickness of the fourth silicon oxide layer is between 17 nm and 50 nm; the thickness of the fourth silicon nitride layer is between 11 nm and 32 nm; the thickness of the fifth silicon oxide layer is between 9 nm and 26 nm; the thickness of the fifth silicon nitride layer is between 10 nm and 31 nm; the thickness of the first silicon oxynitride layer is between 17 nm and 50 nm; the thickness of the sixth silicon nitride layer is between 16 nm and 48 nm; and the thickness of the second silicon oxynitride layer is between 33 nm and 99 nm.

[0020] In some embodiments, the first type of film layer includes a silicon oxide layer; and the second type of film layer includes a tantalum oxide layer or an aluminum oxide layer.

[0021] In some embodiments, the number of the first type of film layers and the number of the second type of film layers are between 12 and 24.

[0022] In some embodiments, the transparent lens comprises a light-transmitting region and a non-light-transmitting region surrounding the light-transmitting region;

[0023] The anti-reflective film covers the light-transmitting region and the non-light-transmitting region; the flash and the lens assembly are both aligned with the light-transmitting region;

[0024] The camera module further comprises:

[0025] The light-absorbing film is attached to the inner surface of the transparent lens and covers the non-light-transmitting region, for absorbing the reflected light generated by the irradiation light on the transparent lens.

[0026] In some embodiments, the light-absorbing film is formed by a plurality of metal film layers stacked in sequence; wherein the materials of adjacent metal film layers are different.

[0027] In some embodiments, the metal film layers comprise a nickel film layer, an aluminum film layer and an indium film layer.

[0028] In some embodiments, the thickness of each metal film layer is between 90 nm and 110 nm.

[0029] In some embodiments, the camera module further comprises:

[0030] The inner decoration is mounted with the lens assembly and the flash;

[0031] The outer decoration is stacked on the inner decoration, and the transparent lens is mounted on the side of the outer decoration away from the inner decoration.

[0032] According to a second aspect of the embodiments of the present disclosure, a terminal device is provided; the terminal device comprises:

[0033] A housing;

[0034] The camera module of the first aspect is arranged on the housing;

[0035] The inner decoration of the camera module is arranged in the housing.

[0036] The technical solutions provided by the embodiments of the present disclosure can include the following beneficial effects:

[0037] In the embodiments of the present disclosure, the camera module includes a lens assembly, a flash, a transparent lens and an anti-reflection film. The lens assembly and the flash are arranged side by side on one side of the inner surface of the transparent lens, and the anti-reflection film is attached to the outer surface of the transparent lens. In this way, the transparent lens covers the lens assembly and the flash, and plays a role of light transmission and protection for the lens assembly and the flash. At the same time, the anti-reflection film can reduce the reflected light formed between the outer surface of the transparent lens and the air in the scene of turning on the flash to take a photo, suppress the photo halo generated by the reflected light entering the lens assembly, effectively improve the light cross problem caused by the reflection of the transparent lens on the lens assembly when taking a photo with the flash, and improve the imaging effect of the camera module. In addition, due to the anti-reflection effect of the anti-reflection film, the distance between the lens assembly and the flash can be set closer, saving the structural space.

[0038] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0039] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present disclosure and, together with the specification, serve to explain the principles of the present disclosure.

[0040] Figure 1 is a structural schematic of a camera module according to an exemplary embodiment Figure 1 .

[0041] Figure 2 is a simulation schematic of reflectivity of an anti-reflection film according to an exemplary embodiment.

[0042] Figure 3 is a structural schematic of a camera module according to an exemplary embodiment Figure 2 .

[0043] Figure 4 is a schematic diagram of a flash light cross problem according to an exemplary embodiment.

[0044] Figure 5 is a structural block diagram of a terminal device according to an exemplary embodiment.

[0045] Figures 1 to 4 The involved reference signs are as follows: 1, camera module; 11, transparent lens; 111, outer surface; 112, inner surface; 12, lens assembly; 13, flash; 14, anti-reflection film; 15, light extinction film. DETAILED DESCRIPTION

[0046] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The following description is only exemplary and is not intended to limit the scope, applicability or configuration of the disclosure. Rather, the exemplary embodiments are presented as example devices and methods consistent with the disclosure as detailed in the claims.

[0047] The camera module according to the embodiments of the present disclosure effectively improves the above-mentioned flash light leakage problem by arranging an anti-reflection film on the outer surface of the transparent lens.

[0048] Referring to Figure 1 , Figure 1 FIG. 1 is a structural schematic diagram of a camera module according to an exemplary embodiment of the present disclosure. Figure 1 The camera module 1 comprises:

[0049] a transparent lens 11;

[0050] a lens assembly 12 arranged on one side of the inner surface 112 of the transparent lens 11;

[0051] a flash 13 arranged on one side of the inner surface 112 of the transparent lens 11 and arranged side by side with the lens assembly 12;

[0052] an anti-reflection film 14 attached to the outer surface 111 of the transparent lens 11;

[0053] The irradiation light emitted by the flash 13 passes through the transparent lens 11 and the anti-reflection film 14 in sequence, and the anti-reflection film 14 reduces the reflected light generated on the transparent lens 11.

[0054] The camera module according to the embodiments of the present disclosure is installed in a terminal device to realize the photographing function of the terminal device through the camera module.

[0055] Here, the transparent lens is arranged at the top end (the uppermost) of the camera module, for transmitting light waves to enable the camera module to complete optical collection. The outer surface of the transparent lens is the surface of the top end of the camera module, and the inner surface is opposite to the outer surface and faces the inside of the camera module.

[0056] The transparent lens comprises a glass lens or a resin lens. The transparent lens can be circular or square, and the embodiments of the present disclosure do not make further limitation thereon.

[0057] In the embodiments of the present disclosure, the camera module is internally provided with a lens assembly, which is located on the side of the transparent lens close to the inner surface and specifically includes an aperture device, a plurality of lenses arranged along the optical axis direction (the plurality of lenses are arranged in sequence downward along the direction away from the transparent lens), an image sensor, a circuit board and the like. The aperture device is used to adjust the light transmittance through the camera module, and the shape, size and other parameters of the plurality of lenses are different, which can process the collected light entering the camera module, so that the light reaching the image sensor can be effectively converted into electrical parameters; the circuit board transmits the electrical parameters converted by the image sensor to the image processing module in the terminal device, so as to realize imaging based on the collected light.

[0058] It should be noted that, in the case that the brightness of the shooting environment is relatively high, the lens assembly can collect the collected light formed by the reflection of natural light of the shooting object to form an image; in the case that the brightness of the shooting environment is relatively low (i.e. dark environment), the provided flash can be used to emit irradiation light to the shooting object, and the collected light is formed by the reflection of the irradiation light of the shooting object.

[0059] Among them, the flash provided by the present disclosure is arranged near the lens assembly and is arranged side by side with the lens assembly on one side of the inner surface of the transparent lens; here, there is a gap between the flash and the inner surface of the transparent lens, and there is also a gap between the lens assembly and the inner surface of the transparent lens, and the above two gaps can ensure the rationality and effectiveness of the installation between the structures.

[0060] Here, the light emitted by the flash is generally visible light with a wavelength of 400 nanometers (nm)-700 nm.

[0061] It can be understood that the transparent lens is arranged above the lens assembly and the flash and covers the lens assembly and the flash, which is used to protect the lens assembly and the flash and improve the problems such as wear and tear and scratches caused by the exposure of the surface of the lens assembly and the flash. In addition, due to the transparency of the transparent lens, the collected light can be transmitted, which is helpful for effective imaging of the lens assembly; the irradiation light can also be transmitted, which improves the dark shooting effect.

[0062] It should be noted that, since the flash (Flash) provided by the embodiments of the present disclosure is arranged below the transparent lens (Glass) (i.e. the Underglass scheme is adopted), the present disclosure does not need to additionally process a flash through hole on the lens or the shell, improves the appearance delicacy, effectively saves the cost, and can be widely applied to terminal devices (such as 3C products of mobile phones, tablet computers and the like) with flash function.

[0063] For example, when the transparent lens is a glass lens, the surface of the glass lens is in contact with air. Since the medium of the glass and the air is not the same, the medium contact interface between the glass and the air will cause the reflected light to be reflected at the position of the outer surface. Even multiple reflections (as shown in FIG. 8) can occur between the outer surface and the inner surface (i.e., the two medium contact interfaces) of the transparent lens. The reflected light after multiple reflections can reach the lens assembly and cause destructive halos when the lens assembly captures light and forms an image, affecting the final imaging effect. Figure 1

[0064] In the embodiments of the present disclosure, the antireflection film (also referred to as an anti-reflective film or AR film) is attached to the transparent lens and covers the outer surface of the transparent lens. Here, the antireflection film can completely cover the transparent lens and have the same shape as the transparent lens, which can improve the appearance consistency.

[0065] For example, when the transparent lens is a glass lens, the antireflection film is attached to the outer surface of the glass lens, which breaks the medium contact interface between the glass and the air. The antireflection film has a smaller reflectivity and can absorb and dissipate the reflected light inside the glass lens formed by the incident light on the outer surface of the glass lens. By reducing the reflected light, the light transmittance of the camera module can be increased.

[0066] In some examples, the antireflection film can be formed by a single-layer film made of a single material. For example, the single-layer film can be made of a low-refractive material such as silicon dioxide (SiO2), magnesium fluoride (MgF2), etc., for reducing the reflection of visible light in a specific wavelength range.

[0067] In other examples, the antireflection film can also be formed by a plurality of film layers stacked together. The antireflection film layers are attached to the outer surface of the transparent lens. The adjacent film layers have different refractive indices. The reflected light is cancelled out due to the interference effect between the film layers with different refractive indices, which can increase the light transmittance and reduce the reflectivity.

[0068] In this example, the film layers can be stacked in the order of increasing refractive index away from the glass lens. For example, the antireflection film is formed by film layers made of MgF2, SiO2, tantalum pentoxide (Ta2O5), silicon nitride (Si x N y Of course, in other examples, the plurality of film layers can also be formed by other stacking manners, which are not limited in the embodiments of the present disclosure.

[0069] ​In some examples of the present disclosure, in order to improve the light transmittance of the camera module to the full-band visible light emitted by the flash, the thickness of each film layer of the anti-reflection film is set. For example, the thickness of each film layer can be set as 1 / 4 of the wavelength of the visible light to be covered, so that the reflected light in the film layer is phase-canceled, thereby improving the light transmittance.

[0070] In the embodiments of the present disclosure, the anti-reflection film is formed on the transparent lens by physical vapor deposition (PVD) coating technology. In the PVD coating process, the solid target material (such as the above-mentioned MgF2, SiO2, etc.) is converted into gaseous atoms or molecules, and is migrated to the surface of the substrate to form a thin film in a vacuum environment. This process includes three main stages: evaporation, migration and deposition. In the evaporation stage, the target atoms are converted into gas; in the migration stage, the gaseous atoms move linearly at high speed in the vacuum chamber to reach the substrate surface; in the deposition stage, the atoms form a continuous and dense film layer on the substrate surface through nucleation and growth processes. The substrate surface can be the outer surface of the transparent lens, or the surface of the previous layer of coating.

[0071] It should be noted that when the flash and the lens assembly are arranged side by side under the transparent lens, there is a predetermined interval between them. Here, if the distance between the flash and the lens assembly is too large, it will destroy the beauty on the appearance modeling (ID modeling), and also greatly limit the stacking design, with low space utilization; however, if the distance between the flash and the lens assembly is set too small in order to achieve close stacking, the light emitted by the flash may affect the lens assembly. Therefore, in the embodiments of the present disclosure, the predetermined interval between the flash and the lens assembly can be set to be between 1.6 mm and 2.5 mm when the anti-reflection film has the anti-reflection effect, so that a smaller interval can be set to achieve better stacking effect, and the actual imaging effect can not be affected, achieving a balance between the stacking effect and the imaging effect.

[0072] In the embodiments of the present disclosure, the camera module includes a lens assembly, a flash, a transparent lens and an anti-reflection film. The lens assembly and the flash are arranged side by side on one side of the inner surface of the transparent lens, and the anti-reflection film is attached to the outer surface of the transparent lens. In this way, the transparent lens covers the lens assembly and the flash, and plays a role of light transmission and protection for the lens assembly and the flash. At the same time, the anti-reflection film can reduce the reflected light formed between the outer surface of the transparent lens and the air in the open flash shooting scene, inhibit the formation of the reflected light into the lens assembly, effectively improve the light leakage problem caused by the reflection of the transparent lens on the lens assembly when shooting with the flash, and improve the imaging effect of the camera module. In addition, due to the anti-reflection effect of the anti-reflection film, the distance between the lens assembly and the flash can be set closer, saving the structural space.

[0073] In some embodiments, the anti-reflective film comprises a plurality of first type film layers and a plurality of second type film layers; the first type film layers have a refractive index less than a preset refractive index, and the second type film layers have a refractive index greater than or equal to the preset refractive index.

[0074] The first type film layers and the second type film layers are alternately stacked.

[0075] In the present embodiment, the anti-reflective film is formed by a plurality of film layers, which comprise a plurality of first type film layers and a plurality of second type film layers. The material forming the first type film layers has a refractive index less than a preset refractive index, so that the first type film layers behave as low refractive index film layers; the material forming the second type film layers has a refractive index greater than or equal to the preset refractive index, so that the second type film layers behave as high refractive index film layers. The preset refractive index can be a refractive index between 1.5-1.6.

[0076] In some examples, the number of the first type film layers and the second type film layers can be the same, and the first type film layers and the second type film layers are alternately stacked, i.e. one second type film layer is arranged between two adjacent first type film layers, and one first type film layer is arranged between two adjacent second type film layers.

[0077] The first type film layers with low refractive index have small hindrance to light, so that more light can penetrate the first type film layers, improving the light transmittance; at the same time, the low refractive index film layers also have a buffering effect, reducing the reflection of light at the interface of different refractive index materials. The second type film layers with high refractive index can enhance the interference effect of light inside the film layers, so that the reflected light is more easily cancelled. Therefore, by alternately using the first type film layers with low refractive index and the second type film layers with high refractive index, a plurality of interference interfaces can be formed, further improving the anti-reflective effect of the anti-reflective film.

[0078] In other examples, the number of the first type film layers and the second type film layers can also be different; for example, the same number of the first type film layers and the second type film layers are alternately stacked, forming a plurality of the above interference interfaces, further improving the anti-reflective effect of the anti-reflective film. The excess number of the first type film layers or the second type film layers can be stacked in other ways; for example, the excess number of the first type film layers can be film layers formed by different refractive index materials, and are attached to the outer surface of the transparent lens according to the rule of increasing refractive index in turn. The above first type film layers and second type film layers alternately stacked composite film layers can be arranged on the excess number of the first type film layers.

[0079] Therefore, the example can increase the light transmission effect and the adhesion between the glass lens by first arranging the first type of film layer with different low refractive index on the transparent lens, and further improve the antireflection effect of the antireflection film by alternately arranging the first type of film layer and the second type of film layer thereon. In addition, the example also provides a more abundant film layer stacking mode, thereby improving the design flexibility and diversity of the antireflection film.

[0080] Here, the first type of film layer includes but is not limited to a film layer formed of fluorine-containing acrylate, SiO2, MgF2, or nano-porous silicon dioxide (SiO x ) and the like; and the second type of film layer includes but is not limited to a film layer formed of Ta2O5, silicon nitride Si x N y , aluminum oxide (Al2O3), silicon oxynitride (SiON), and TiO2 and the like.

[0081] In the embodiments of the present disclosure, the first type of film layer with low refractive index and the second type of film layer with high refractive index are alternately stacked, so as to form a plurality of interference interfaces, thereby further improving the antireflection effect of the antireflection film.

[0082] In some embodiments, the second type of film layer includes a plurality of first sub-film layers and at least two second sub-film layers; the refractive index of the first sub-film layer is greater than the refractive index of the second sub-film layer; and the hardness of the second sub-film layer is greater than the hardness of the first type of film layer.

[0083] For a part of the first sub-film layers in the plurality of first type of film layers and the plurality of first sub-film layers, the first type of film layer and the first sub-film layer are alternately stacked in a direction away from the transparent lens;

[0084] At least two second sub-film layers are arranged on a side of all the first type of film layers away from the transparent lens.

[0085] For the at least two second sub-film layers and another part of the first sub-film layers in the plurality of first sub-film layers, the second sub-film layer and the first sub-film layer are alternately stacked in a direction away from the first type of film layer.

[0086] Here, the second type of film layer with high refractive index can include a first sub-film layer and a second sub-film layer, wherein the refractive index of the first sub-film layer and the second sub-film layer is higher than that of the first type of film layer, but the refractive index of the second sub-film layer is less than that of the first sub-film layer.

[0087] It can be understood that the part of the film layer far from the glass lens (top film layer) is more susceptible to external forces such as scratches than the other part of the film layer close to the glass lens (bottom film layer and intermediate film layer). If the hardness of the top film layer is insufficient, cracks can be formed on the antireflection film, affecting the imaging effect. Based on this, the number of second sub-film layers is greater than the number of first film layers in the embodiments of the present disclosure, and a part of the second sub-film layers and the first film layers are alternately stacked in the direction away from the transparent lens to form the bottom film layer and the intermediate film layer. The multiple interference interfaces formed in this way can directly phase cancel the reflected light of the incident light. In addition, the embodiments of the present disclosure also select some second sub-film layers with higher hardness but lower refractive index than the first film layers, and alternately stack them with another part of the second sub-film layers to form the top film layer. In this way, the top film layer not only can form certain destructive interference of light due to the refractive index difference between the film layers, but also can enhance the hardness of the top film layer, further improve the service life of the antireflection film, and ensure the imaging effect.

[0088] It should be noted that the above-mentioned multiple first film layers can be film layers of the same material or film layers of different materials; the above-mentioned multiple first sub-film layers and at least two second sub-film layers can also be film layers of the same material or film layers of different materials, respectively, and the embodiments of the present disclosure do not limit this.

[0089] In some embodiments, the first film layer includes a silicon oxide layer; the first sub-film layer includes a silicon nitride layer; and the second sub-film layer includes a silicon oxynitride layer.

[0090] Here, the SiO2 layer has good chemical stability, excellent optical performance, and low refractive index, usually between 1.46-1.5. The low-refractive SiO2 layer is arranged closer to the transparent lens, which can effectively increase the transmittance of the incident light (or n times reflected light). Si x N y The refractive index of the SiO2 layer is higher, usually around 2.0, and when alternately stacked between the SiO2 layer, it can form multiple effective interference interfaces, thereby better realizing phase cancellation of the reflected light. Si x N y The Si3N4 layer, especially the Si3N4 layer with higher nitrogen (N) content, has very high hardness and wear resistance, and can be arranged on the side away from the transparent lens to fully protect the transparent lens.

[0091] In addition, SiON is a mixture of SiO2 and Si x N yThe SiON layer has a refractive index between the refractive index of the SiO2 layer and the refractive index of the Si3N4 layer, generally between 1.6 and 1.97, and the hardness of the SiON layer is higher than the hardness of the SiO2 layer; in this way, the SiON layer can be alternately arranged with the Si3N4 layer to form a top film layer away from the transparent lens, effectively increasing the overall hardness of the antireflection film. At the same time, the SiON layer has smaller structural stress than the SiO2 layer, and is arranged farther away from the glass lens, which can reduce the breakage of the glass lens due to external stress.

[0092] In some embodiments, the first type of film layer includes a SiO2 layer; the first sub-film layer includes an Al2O3 layer; and the second sub-film layer includes a Si x N y layer.

[0093] In this way, the embodiments of the present disclosure can effectively improve the antireflection effect of the entire antireflection film by alternately stacking a part of the second sub-film layer and the first type of film layer in the direction away from the transparent lens to form a bottom film layer and an intermediate film layer; in addition, some second sub-film layers with higher hardness but lower refractive index than the first type of film layer are selected to be alternately stacked with another part of the second sub-film layer to form a top film layer, so that the antireflection film has good mechanical properties and improves the problem of crack formation.

[0094] In some embodiments, the antireflection film is stacked in the direction away from the transparent lens by a first silicon oxide layer, a first silicon nitride layer, a second silicon oxide layer, a second silicon nitride layer, a third silicon oxide layer, a third silicon nitride layer, a fourth silicon oxide layer, a fourth silicon nitride layer, a fifth silicon oxide layer, a fifth silicon nitride layer, a first silicon oxynitride layer, a sixth silicon nitride layer, and a second silicon oxynitride layer; wherein the thickness of the first silicon oxide layer is between 5 nm and 15 nm; the thickness of the first silicon nitride layer is between 10 nm and 30 nm; the thickness of the second silicon oxide layer is between 18 nm and 53 nm; the thickness of the second silicon nitride layer is between 33 nm and 99 nm; the thickness of the third silicon oxide layer is between 62 nm and 185 nm; the thickness of the third silicon nitride layer is between 27 nm and 80 nm; the thickness of the fourth silicon oxide layer is between 17 nm and 50 nm; the thickness of the fourth silicon nitride layer is between 11 nm and 32 nm; the thickness of the fifth silicon oxide layer is between 9 nm and 26 nm; the thickness of the fifth silicon nitride layer is between 10 nm and 31 nm; the thickness of the first silicon oxynitride layer is between 17 nm and 50 nm; the thickness of the sixth silicon nitride layer is between 16 nm and 48 nm; and the thickness of the second silicon oxynitride layer is between 33 nm and 99 nm.

[0095] It should be noted that the general anti-reflection film is designed for the anti-reflection of 0° incident angle light, and since the shooting object and the camera module are not necessarily directly opposite, the incident angle (AOI) range of the irradiation light emitted by the flash can be increased, thereby increasing the visible range in a dark environment and achieving a larger field of view range for shooting.

[0096] Since the optical requirement AOI is usually in the range of 0°-30°, 55°-65°, in order to achieve an average reflectivity <2%, the reliability of the film layer will be sacrificed, since the lower the optical reflectivity, the lower the hardness, the greater the risk of scratching and film falling off, therefore, considering the AOI range requirement, the hardness requirement of the anti-reflection film, and the requirement of covering the visible light range (generally needs to cover the full waveband of visible light), the thickness, material, and stacking method of each film layer of the stack are simulated and designed in the embodiment of the present disclosure, so as to obtain an anti-reflection film with lower reflectivity while meeting the above requirements.

[0097] Through simulation, the embodiment of the present disclosure proposes an anti-reflection film, which is stacked in the direction away from the transparent lens by a first SiO2 layer, a first Si3N4 layer, a second SiO2 layer, a second Si3N4 layer, a third SiO2 layer, a third Si3N4 layer, a fourth SiO2 layer, a fourth Si3N4 layer, a fifth SiO2 layer, a fifth Si3N4 layer, a first SiON layer, a sixth Si3N4 layer, and a second SiON layer; wherein the thickness of the first SiO2 layer is between 5nm-15nm; the thickness of the first Si3N4 layer is between 10nm-30nm; the thickness of the second SiO2 layer is between 18nm-53nm; the thickness of the second Si3N4 layer is between 33nm-99nm; the thickness of the third SiO2 layer is between 62nm-185nm; the thickness of the third Si3N4 layer is between 27nm-80nm; the thickness of the fourth SiO2 layer is between 17nm-50nm; the thickness of the fourth Si3N4 layer is between 11nm-32nm; the thickness of the fifth SiO2 layer is between 9nm-26nm; the thickness of the fifth Si3N4 layer is between 10nm-31nm; the thickness of the first SiON layer is between 17nm-50nm; the thickness of the sixth Si3N4 layer is between 16nm-48nm; the thickness of the second SiON layer is between 33nm-99nm. Under such design, when the AOI is in the range of 0°-65°, the reflectivity of the anti-reflection film is <1%.

[0098] Referring to Table 1, Table 1 is an example of the stacking of each film layer of an anti-reflection film with reflectivity <1% when the AOI is in the range of 0°-65°.

[0099]

[0100] In addition, referring to Figure 2 , Figure 2 is a simulation diagram of reflectivity of an antireflection film according to an example embodiment. Wherein, Figure 2 the abscissa axis represents the angle of incidence (AOI) of the irradiation light emitted by the flash, Figure 2 the ordinate axis represents the reflectivity of the antireflection film to the light wave of the specified incidence angle. Wherein, the light wave of the specified incidence angle counted here covers the wavelength range of 400nm-700nm.

[0101] from Figure 2 It can be seen that the antireflection film shown in the above table can achieve a reflectivity of <0.5% when the AOI is in the range of 0°-65°; in addition, due to the presence of the antireflection film on the outer surface, the reflectivity is reduced by 76% compared to not setting the antireflection film (i.e. forming a glass-air interface), and the irradiation light emitted by the flash is more easily transmitted into the surrounding environment after reaching the interface, and the proportion of light intensity participating in reflection is significantly reduced.

[0102] Therefore, the thickness, material, stacking manner, etc. of each film layer arranged in the stack are designed as described above, so that the antireflection film has a reflectivity of <1% for the irradiation light in the range of 0°-65° and in the full wavelength range of 400nm-700nm.

[0103] In some embodiments, the first type of film layer includes a silicon oxide layer; and the second type of film layer includes a tantalum oxide layer or an aluminum oxide layer.

[0104] Here, the example embodiments of the present disclosure also provide some second type of film layers with high hardness and high refractive index, such as Al2O3 layers and Ta2O5 layers; therefore, in some examples, the example embodiments of the present disclosure can stack SiO2 layers and Al2O3 layers alternately to form an antireflection film; in other examples, stack SiO2 layers and Ta2O5 layers alternately to form an antireflection film; in yet other examples, the adjacent two SiO2 layers of the antireflection film can be partially provided with Ta2O5 layers and partially provided with Al2O3 layers.

[0105] It should be noted that in the example in which the adjacent two SiO2 layers of the antireflection film are partially provided with Ta2O5 layers and partially provided with Al2O3 layers, considering that the hardness of the Al2O3 layer is less than that of the Ta2O5 layer, the Al2O3 layer and the SiO2 layer are generally arranged to form a bottom film layer or a middle film layer, and the Ta2O5 layer and the SiO2 layer are arranged to form a top film layer.

[0106] In the embodiments of the present disclosure, by selecting Al2O3 layer and Ta2O5 layer as the material with high refractive index, the overall hardness of the antireflection film can be improved, and the problem of crack formation on the antireflection film or transparent lens can be improved.

[0107] In some embodiments, the sum of the number of the first type of film layers and the number of the second type of film layers is between 12 and 24.

[0108] Here, by setting the sum of the number of the first type of film layers and the number of the second type of film layers to be between 12 and 24, a more appropriate number of interference interfaces can be generated, so that the antireflection effect of the antireflection film is more effective; and through actual test results, it can be known that such a number of film layers can achieve lower reflectivity for the full-band visible light within the range of 0°-65° of AOI.

[0109] In some embodiments, the transparent lens includes a light-transmitting region and a non-light-transmitting region surrounding the light-transmitting region.

[0110] The antireflection film covers the light-transmitting region and the non-light-transmitting region; the flash and the lens assembly are aligned with the light-transmitting region.

[0111] The camera module further includes:

[0112] The light-absorbing film is attached to the inner surface of the transparent lens and covers the non-light-transmitting region, and is used to absorb the reflected light generated by the incident light on the transparent lens.

[0113] Here, referring to Figure 3 , Figure 3 is a structural schematic diagram of a camera module according to an exemplary embodiment Figure 2 . Wherein the light-absorbing film 15 is attached to the inner surface 112 opposite to the outer surface 111 of the transparent lens 11, and the antireflection film 14 is arranged on the opposite sides of the transparent lens 11, respectively.

[0114] In the embodiments of the present disclosure, the light-transmitting region is located in the central region, for allowing the collected light from the outside to pass through, so that the lens assembly aligned with the light-transmitting region can collect the incident light and form an image based on the incident light; and also for allowing the incident light to pass out from the light-transmitting region to the shooting object. It should be noted that the non-light-transmitting region surrounds the light-transmitting region, for blocking the light from passing through. Here, since the light-absorbing film is set as an opaque film, the non-light-transmitting region of the transparent lens has the function of not transmitting light.

[0115] Wherein the light-absorbing film has a light-absorbing effect, so that the light is diffusely reflected on the surface of the film instead of being concentratedly reflected, and can also absorb a certain range of spectrum, so that the reflected light in the transparent lens can be absorbed and consumed, and the problem of flash light leakage can be improved.

[0116] Here, the transparent lens can be circular or square, and the light extinction film is formed on the edge of the inner surface of the transparent lens and extends inward, and can be annular.

[0117] In the embodiments of the present disclosure, the light extinction film can be formed of a metal material, or a composite material formed of a metal material and some semiconductor material such as monocrystalline silicon.

[0118] In this way, by arranging the light extinction film on the non-light-transmitting area of the inner surface of the transparent lens, the reflected light can be effectively absorbed and dissipated, reducing the reflected light emitted towards the lens assembly, further improving the problem of flashlight string light, and improving the imaging quality.

[0119] In some embodiments, the light extinction film is formed by stacking a plurality of metal film layers in sequence.

[0120] The materials of adjacent metal film layers are different.

[0121] Here, since the metal material has a better light extinction coefficient than the non-metal material, the light will be scattered when reflected on the metal surface, thereby reducing the gloss and producing excellent light extinction effect. In addition, after stacking a plurality of metal film layers of different materials, a light extinction film with a blackness that is darker than ink can be obtained, which has better light absorption effect and can absorb and dissipate the reflected light as much as possible. In addition, the metal film layers of different materials can reflect and transmit at the interface where they contact each other, and the reflected light waves can interfere with each other, resulting in a specified wavelength of light being weakened.

[0122] In this way, by arranging the light extinction film formed by stacking a plurality of metal film layers of different materials in sequence, a light extinction film with a blackness that is darker than ink can be obtained, and the light extinction, interference and scattering characteristics of the metal material can be utilized to further reduce the adverse effects of light waves entering the interior on the lens assembly.

[0123] In some embodiments, the metal film layer includes a nickel (Ni) film layer, an aluminum (Al) film layer, and an indium (In) film layer.

[0124] The Ni material and the Al material have good corrosion resistance, heat resistance, and good hardness. Although the In material is relatively active, its corrosion rate is inhibited when stacked with other metals. In addition, the Ni material, the Al material and the In material all have good light extinction performance, so the Al film layer, the Ni film layer and the In film layer can be stacked in sequence to obtain the light extinction film.

[0125] Here, in order to achieve good extinction effect on visible light in the 400nm-700nm waveband, the embodiments of the present disclosure can adaptively adjust the number of film layers according to actual conditions. In some examples, three metal film layers can be provided, for example, Al film layer, Ni film layer and In film layer are sequentially stacked; in other examples, more metal film layer combinations can be provided, for example, Al film layer, Ni film layer, In film layer and chromium (Cr) film layer are sequentially stacked.

[0126] It should be noted that the embodiments of the present disclosure directly attach the Al film layer to the inner surface of the transparent lens, and stack other film layers away from the transparent lens on the Al film layer, which can improve the adhesion of the extinction film on the transparent lens.

[0127] In some embodiments, the thickness of each metal film layer is between 90nm-110nm.

[0128] It can be understood that since the thickness of the metal film layer is too thin to absorb light well, and the metal film layer is too thick to cause light reflection, the embodiments of the present disclosure set the thickness of each metal film layer to be between 90nm-110nm, so that good extinction effect is achieved for visible light in the 400nm-700nm waveband, further reducing the reflected light invading the lens assembly, and improving the above-mentioned crosstalk problem.

[0129] For example, the thickness of each metal film layer is set to 100nm.

[0130] In the embodiments of the present disclosure, another anti-reflection film can also be provided on the inner surface of the transparent lens facing the lens assembly and the flash; the anti-reflection film on the outer surface can be the same or different. For example, the hardness of the anti-reflection film on the inner surface can be less than the hardness of the anti-reflection film on the outer surface.

[0131] It should be noted that when the anti-reflection film is also provided on the inner surface, it can only cover the light transmission area and be attached to the inner surface with the extinction film; or it can cover the entire inner surface first, the extinction film is attached to the anti-reflection film and covers the non-light transmission area.

[0132] In the embodiments of the present disclosure, the attachment and installation between the above-mentioned anti-reflection film and the transparent lens, and the attachment and installation between the extinction film and the transparent lens, can be completed by the transparent optical adhesive.

[0133] In some embodiments, the above-mentioned camera module further comprises:

[0134] The inner decoration part, the lens assembly and the flash are all installed in the inner decoration part;

[0135] The outer decoration part is stacked on the inner decoration part, and the transparent lens is installed on the side of the outer decoration part away from the inner decoration part.

[0136] Here, the outer decoration part (deco) is usually arranged on the shell of the terminal device, used for decorating the appearance of the terminal device and protecting the camera module. The inner decoration part (deco) is arranged in the shell of the terminal device, used for decorating the inside of the terminal device and accommodating the lens assembly and flash of the camera module.

[0137] Among them, the outer decoration part and the inner decoration part can both be metal structures, or both be plastic structures, or the outer decoration part can be a metal structure and the inner decoration part can be a plastic structure; the embodiments of the present disclosure do not limit this.

[0138] The transparent lens in the embodiments of the present disclosure is attached to the surface of the outer decoration part as a protective lens for the internal devices of the camera module, has a certain structural hardness, and has good light transmittance. Among them, the outer decoration part can be cylindrical, and the inner wall is provided with mounting lines, and the transparent lens is arranged on the outer decoration part through the mounting lines.

[0139] The lens assembly in the embodiments of the present disclosure includes an aperture device, a plurality of lenses, an image sensor, a circuit board, etc.; among them, the inner decoration part can also be cylindrical, and the inner wall is provided with mounting lines, and each device of the lens assembly is sequentially arranged in the inner decoration part through different mounting lines. In addition, the inner decoration part also has a mounting groove with a predetermined interval between the lens assembly, and the flash is arranged in the mounting groove.

[0140] Among them, in combination with the above examples, the outer decoration part is stacked on the inner decoration part, and the inner wall of the inner decoration part and the inner wall of the outer decoration part are arranged in communication; in some examples, the aperture device and part of the lenses of the lens assembly can also be mounted on the inner wall of the outer decoration, so as to realize more flexible zoom shooting.

[0141] The embodiments of the present disclosure can ensure the structural stability of the camera module by mounting the transparent lens on the outer decoration part, and mounting the lens assembly and the flash on the inner decoration part, so as to realize more effective and stable shooting function.

[0142] In some other embodiments of the present disclosure, the transparent lens can also be arranged on the outer decoration part, part of the lens module is arranged on the inner decoration part, part of the lens module is arranged on the outer decoration part, and the flash is arranged in the outer decoration part and located on the inner surface side of the transparent lens.

[0143] The embodiments of the present disclosure also propose a terminal device. The terminal device comprises:

[0144] The shell;

[0145] The camera module proposed in the above embodiments of the present disclosure is arranged on the shell.

[0146] The inner decoration part of the camera module is arranged in the shell.

[0147] The terminal device is a device with a shooting function. For example, the terminal device can be a mobile phone, a tablet computer, a personal computer device, a wearable device (such as a wearable watch or wearable glasses), or an Internet of Things terminal. The Internet of Things terminal includes, but is not limited to, a smart home device and / or a smart office device, and is not limited to the foregoing. The embodiments of the present disclosure do not limit the terminal device.

[0148] The shell is used to cover and protect functional modules such as a battery, a mainboard, and a small board in the electronic device. The shell can be a battery cover, which can be made of a metal material or a glass or plastic material.

[0149] The shell is provided with a camera opening. The outer decoration part of the camera module is exposed outward through the camera opening and is fixedly arranged on the shell. The transparent lens (for example, a glass lens) of the camera module is fixedly arranged on the outer decoration part. The inner decoration part is fixedly connected to the outer decoration part and is located in the shell. The lens assembly and the flash of the camera module are respectively arranged at different positions of the inner decoration part and are aligned with the camera opening.

[0150] It can be understood that the shell is usually a rear shell, and the camera module is usually a rear camera module. Of course, in another example, the shell can be a front shell of a screen in a scenario in which a front camera module is provided with a flash. The embodiments of the present disclosure do not limit the shell.

[0151] The camera module arranged at the shell of the terminal device can effectively implement shooting. In addition, the anti-reflection film and the light extinction film arranged in the camera module can not only effectively implement lens transmittance but also can suppress reflection on the inner and outer sides of the lens as a whole, thereby solving the problem of flash light leakage.

[0152] The terminal device to which the camera module is applied is exemplarily taken as a mobile phone in the following description of the embodiments.

[0153] In the field of mobile phone structures, the stacking layout between the flash and the lens assembly can be more compact in terms of structure modeling, thereby saving stacking space. Meanwhile, the flash can adopt an underglass scheme, so that the transparent lens or the shell does not need to be additionally processed to have a through hole, thereby improving the delicacy of the appearance and saving costs. The scheme has application value for shooting devices with a flash function, especially for 3C products similar to mobile phones.

[0154] Due to limited stacking space, the flash in the mobile phone is generally arranged close to the lens assembly, and the current design is mainly multi-module and large lens, which is very easy to cause the reflection of the transparent lens and cause the problem of light stringing, affecting the imaging quality. Therefore, the conventional methods mainly include: 1. lengthening the distance between the lens assembly and the flash, but the stacking design has great limitations, the space utilization rate is low, and the effect is not ideal; 2. setting a through hole for installing the flash on the transparent lens, which affects the delicacy of the appearance. Especially when the flash is arranged at the edge of the transparent lens, the laser or processing difficulty of the lens is increased, and the reliability of the whole machine lens is reduced.

[0155] Referring to Figure 4 , Figure 4 is a schematic diagram of a flash light stringing problem according to an exemplary embodiment. As shown in Figure 4 , the transparent lens 11 has two glass-air medium contact interfaces, and the average reflectivity of each medium contact interface to the full waveband visible light (400nm-700nm) is about 4.2%. After multiple reflections, part of the illumination light emitted by the flash 13 will invade into the lens assembly 12, especially the light with an incident angle (relative to the normal of the lens plane, AOI) greater than 55°, that is, the light with an angle of incidence greater than the Brewster angle will be totally reflected. Due to the high light intensity of the flash, even if there is one thousandth of light stringing, it will affect the imaging, especially in dark or night conditions, the problem is more prominent.

[0156] Based on this, the camera module 1 as shown in Figure 3 is provided in the present embodiment, a reflection-reducing film 14 is arranged on the outer surface 111 of the transparent lens 11, and a light-absorbing film 15 is arranged on the inner surface 112 of the transparent lens 11.

[0157] It can be understood that the general reflection-reducing film is designed for the reflection reduction of light with an incident angle of 0°, and the present embodiment increases the optimization for AOI in the range of 55°-65°, and simulates the design of the film stack. In addition, the outer surface is the surface facing the external environment, so the reflection-reducing film needs to have wear resistance and hardness requirements, therefore, the reflection-reducing film in the present embodiment is made of a stack of SiO2 layer, SixNy layer and SiON layer. In consideration of the hardness design, Si x N y and SiON can be replaced by hard materials such as Al2O3 and Ta2O5.

[0158] The optical requirement AOI is in the range of 0°-30° and 55°-65°, the wavelength is in the visible light range of 400nm-700nm, and the average reflectivity of the film is less than 2%. It should be noted that the reflectivity requirement can be further reduced, and the corresponding reliability will be sacrificed. The lower the optical reflectivity, the lower the hardness, the greater the risk of scratching and film falling off, and the corresponding balance needs to be made in combination with the actual application situation. Therefore, the embodiment of the present disclosure proposes a stacking mode as shown in Table 1 above. The anti-reflective film is stacked in the direction away from the transparent lens by the first SiO2 layer, the first Si3N4 layer, the second SiO2 layer, the second Si3N4 layer, the third SiO2 layer, the third Si3N4 layer, the fourth SiO2 layer, the fourth Si3N4 layer, the fifth SiO2 layer, the fifth Si3N4 layer, the first SiON layer, the sixth Si3N4 layer and the second SiON layer. For specific film layer thickness, refer to Table 1 shown in the above text.

[0159] In combination with Table 1 and the attached Figure 2 It can be seen that in the range of 0°-65°, the reflectivity of the film system is less than 0.5%. Therefore, due to the anti-reflective film provided on the outer surface, the reflectivity of the medium contact interface between the glass-air on the outer side of the transparent lens is reduced by 76% compared with the untreated (4.2%). The irradiation light of the flash lamp is more easily transmitted into the surrounding environment after reaching the interface, and the proportion of light intensity participating in reflection is significantly reduced.

[0160] In the embodiment of the present disclosure, the light extinction film is attached and provided on the inner surface of the transparent lens, which is a kind of super black absorption film. For the glass-air medium contact interface on the inner side of the transparent lens, the reflected light can be absorbed and dissipated as much as possible. The light extinction film formed by metal material makes the reflectivity of the above-mentioned inner surface reduce to about 0.2% compared with the ink film layer, and the appearance blackness is darker than pure ink, which is more advantageous in lens integration.

[0161] The light extinction film is formed by three metal film layers, specifically by Ni film layer, Al film layer and In film layer, and the thickness of each metal film layer is between 90nm-110nm. Since the extinction coefficient of metal varies with the wavelength of light, according to the light band requirement, the metal film layer can be combined in three layers or more layers to achieve full-band extinction. The combination of the three metal film layers of the present disclosure can cover the visible light in the wavelength range of 400nm-700nm.

[0162] In this way, in the simulation experiment, the exposure brightness of the flash lamp is set to 3W lux, the exposure time is 1s, and a dark environment is constructed. The probability of imaging glare is significantly reduced when the anti-reflective film and the light extinction film are applied on the transparent lens, and the distance between the lens assembly and the flash lamp is reduced from 2.8mm to 1.7mm.

[0163] Figure 5 is a structural block diagram of a terminal device according to an exemplary embodiment. The terminal device 500 may, for example, be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, or the like.

[0164] Referring to Figure 5 , the terminal device 500 can include one or more of the following components: a processing component 502, a memory 504, a power supply component 506, a multimedia component 508, an audio component 510, an input / output (I / O) interface 512, a sensor component 514, and a communication component 516.

[0165] The processing component 502 usually controls overall operations of the terminal device 500, such as operations associated with display, phone call, data communication, camera operation and recording operation, at least one of them. The processing component 502 can include one or more processors 520 to execute instructions to complete all or part of the steps of the methods described above. In addition, the processing component 502 can include one or more modules to facilitate the interaction between the processing component 502 and other components. For example, the processing component 502 can include a multimedia module to facilitate the interaction between the multimedia component 508 and the processing component 502.

[0166] The memory 504 is configured to store various types of data to support operations on the terminal device 500. Examples of these data include at least one of the following: instructions for any application or method operating on the terminal device 500, contact data, phonebook data, messages, pictures, and videos. The memory 504 can be implemented by any type of volatile or non-volatile storage devices or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read only memory (EEPROM), erasable programmable read only memory (EPROM), programmable read only memory (PROM), read only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0167] The power supply component 506 provides power to the various components of the terminal device 500. The power supply component 506 can include at least one of the following: a power management system, one or more power supplies, and other components associated with generating, managing and distributing power for the terminal device 500.

[0168] The multimedia component 508 includes a screen providing an output interface between the terminal device 500 and the user. In some embodiments, the screen can include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide and gestures on the touch panel. The touch sensor can not only sense a boundary of a touching or a sliding action, but also detect duration and pressure related to the touching or sliding action. In some embodiments, the multimedia component 508 includes a front camera and / or a rear camera. When the terminal device 500 is in an operation mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each of the front and rear cameras can be a fixed optical lens system or have a focal length and optical zoom capability.

[0169] The audio component 510 is configured to output and / or input audio signals. For example, the audio component 510 includes a microphone (MIC) that is configured to receive external audio signals when the terminal device 500 is in an operation mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals can be further stored in the memory 504 or transmitted via the communication component 516. In some embodiments, the audio component 510 also includes a speaker for outputting audio signals.

[0170] The input / output interface 512 provides an interface between the processing component 502 and peripheral interface modules, which can be a keyboard, a click wheel, and buttons, etc. The buttons can include, but are not limited to, a home button, a volume button, a start button, and a lock button.

[0171] The sensor component 514 includes one or more sensors to provide the terminal device 500 with state assessments of various aspects. For example, the sensor component 514 can detect an open / closed state of the terminal device 500, relative positioning of components, such as a display and keypad of the terminal device 500, a change in position of the terminal device 500 or a component of the terminal device 500, presence or absence of user contact with the terminal device 500, orientation or acceleration / deceleration of the terminal device 500, and temperature changes of the terminal device 500. The sensor component 514 can include a proximity sensor configured to detect presence of a nearby object without any physical contact. The sensor component 514 can also include a light sensor, such as a complementary metal-oxide-semiconductor (CMOS) or charge-coupled device (CCD) image sensor, utilized in imaging applications. In some embodiments, the sensor component 514 can further include, but is not limited to, at least one of an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, and a temperature sensor.

[0172] The communication component 516 is configured to facilitate wired or wireless communication between the terminal device 500 and other devices. The terminal device 500 can access a wireless network based on a communication standard, such as Wi-Fi, 4G, 5G, or a combination thereof. In an example embodiment, the communication component 516 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In an example embodiment, the communication component 516 further includes a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on Radio Frequency Identification (RFID) technology, Infrared Data Association (IrDA) technology, Ultra Wide Band (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0173] In an example embodiment, terminal device 500 can be implemented with one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components.

[0174] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the features disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the disclosure being indicated by the following claims.

[0175] It will be understood that the present disclosure is not limited to the precise structures herein described and illustrated in the drawings, and that various modifications and changes can be made without departing from its scope. The scope of the present disclosure is limited only by the claims that follow.

Claims

1. An image capturing module, comprising: The application relates to a camera lens, which comprises the following components: a transparent lens; a lens assembly arranged on one side of the inner surface of the transparent lens; a flash arranged on one side of the inner surface of the transparent lens and arranged side by side with the lens assembly; an anti-reflection film attached to the outer surface of the transparent lens; wherein the irradiation light emitted by the flash sequentially passes through the transparent lens and the anti-reflection film, and the anti-reflection film reduces the reflected light generated on the transparent lens. The anti-reflection film comprises a plurality of first film layers and a plurality of second film layers; the refractive index of the first film layers is less than a preset refractive index, and the refractive index of the second film layers is greater than or equal to the preset refractive index; wherein the first film layers and the second film layers are alternately stacked. The second film layers comprise a plurality of first sub-film layers and at least two second sub-film layers; the refractive index of the first sub-film layers is greater than that of the second sub-film layers; the hardness of the second sub-film layers is greater than that of the first film layers; for a part of the first sub-film layers in the plurality of first film layers and the plurality of first sub-film layers, the first film layers and the first sub-film layers are alternately stacked in a direction away from the transparent lens; at least two second sub-film layers are arranged on one side of all the first film layers away from the transparent lens; for the other part of the first sub-film layers in the at least two second sub-film layers and the plurality of first sub-film layers, the second sub-film layers and the first sub-film layers are alternately stacked in a direction away from the first film layers. The first film layers comprise a silicon oxide layer; the first sub-film layers comprise a silicon nitride layer; and the second sub-film layers comprise a silicon oxynitride layer. The anti-reflection film is sequentially stacked by a first silicon oxide layer, a first silicon nitride layer, a second silicon oxide layer, a second silicon nitride layer, a third silicon oxide layer, a third silicon nitride layer, a fourth silicon oxide layer, a fourth silicon nitride layer, a fifth silicon oxide layer, a fifth silicon nitride layer, a first silicon oxynitride layer, a sixth silicon nitride layer and a second silicon oxynitride layer in a direction away from the transparent lens; wherein the thickness of the first silicon oxide layer is between 5nm and 15nm; the thickness of the first silicon nitride layer is between 10nm and 30nm; the thickness of the second silicon oxide layer is between 18nm and 53nm; the thickness of the second silicon nitride layer is between 33nm and 99nm; the thickness of the third silicon oxide layer is between 62nm and 185nm; the thickness of the third silicon nitride layer is between 27nm and 80nm; the thickness of the fourth silicon oxide layer is between 17nm and 50nm; the thickness of the fourth silicon nitride layer is between 11nm and 32nm; the thickness of the fifth silicon oxide layer is between 9nm and 26nm; the thickness of the fifth silicon nitride layer is between 10nm and 31nm; the thickness of the first silicon oxynitride layer is between 17nm and 50nm; the thickness of the sixth silicon nitride layer is between 16nm and 48nm; and the thickness of the second silicon oxynitride layer is between 33nm and 99nm. ​ 2. The camera module of claim 1, wherein, ​ ​ 3. The camera module of claim 2, wherein, ​ ​ ​ ​ 4. The camera module of claim 3, wherein, ​ 5. The camera module of claim 4, wherein, ​ ​ 6. The camera module of claim 2, wherein, The first type of film layer comprises a silicon oxide layer; and the second type of film layer comprises a tantalum oxide layer or an aluminum oxide layer.

7. The camera module of any one of claims 2 to 6, wherein, The number of the first type of film layer and the number of the second type of film layer are between 12 and 24.

8. The camera module of any one of claims 1 to 6, wherein, The transparent lens comprises a light-transmitting region and a non-light-transmitting region surrounding the light-transmitting region. The anti-reflective film covers the light-transmitting region and the non-light-transmitting region; and the flash and the lens assembly are aligned with the light-transmitting region. The camera module further comprises: The light-absorbing film is attached to the inner surface of the transparent lens and covers the non-light-transmitting region, and is used to absorb reflected light generated by the irradiation light on the transparent lens.

9. The camera module of claim 8, wherein, The light-absorbing film is formed by sequentially stacking a plurality of metal film layers; and the materials of adjacent metal film layers are different.

10. The camera module of claim 9, wherein, The metal film layers comprise a nickel film layer, an aluminum film layer, and an indium film layer.

11. The camera module of claim 9, wherein, The thickness of each metal film layer is between 90 nm and 110 nm.

12. The camera module of any one of claims 1-6, wherein, The camera module further comprises: The lens assembly and the flash are mounted on the inner decorative part; The outer decorative part is stacked on the inner decorative part, and the transparent lens is mounted on the side of the outer decorative part away from the inner decorative part.

13. A terminal device, comprising: It comprises: A housing; The camera module according to any one of claims 1 to 12, wherein the outer decorative part of the camera module is arranged on the housing; and The inner decorative part of the camera module is arranged in the housing.

Images