阅读说明：本技术 黑色膜及其制备方法、镜筒、摄像头和电子设备 (Black film, preparation method thereof, lens barrel, camera and electronic equipment ) 是由 袁正超 游兴龙 刘兵波 于 2020-11-25 设计创作，主要内容包括：本申请提供了一种黑色膜,包括减反膜层、增强层和抗指纹层,所述减反膜层在420nm-780nm波长下的反射率低于1％,所述减反膜层设置在所述增强层和所述抗指纹层之间,或所述增强层设置在所述减反膜层和所述抗指纹层之间。该黑色膜的反射率低,内部结合力优异,耐磨性能和耐擦拭性能佳,其能够用于镜筒表面,降低反射光对成像的影响,同时使用寿命长。本申请还提供了黑色膜的制备方法、镜筒、摄像头和电子设备。(The application provides a black film, including subtracting anti-membrane layer, enhancement layer and anti fingerprint layer, subtract anti-membrane layer reflectivity under 420nm-780nm wavelength and be less than 1%, subtract anti-membrane layer setting and be in the enhancement layer with between the anti fingerprint layer, or the enhancement layer sets up subtract anti-membrane layer with between the anti fingerprint layer. The black film has low reflectivity, excellent internal binding force, good wear resistance and wiping resistance, can be used on the surface of a lens barrel, reduces the influence of reflected light on imaging, and has long service life. The application also provides a preparation method of the black film, a lens barrel, a camera and electronic equipment.)

1. A black film is characterized by comprising an anti-reflection film layer, an enhancement layer and an anti-fingerprint layer, wherein the reflectivity of the anti-reflection film layer at the wavelength of 420nm-780nm is lower than 1%, the anti-reflection film layer is arranged between the enhancement layer and the anti-fingerprint layer, or the enhancement layer is arranged between the anti-reflection film layer and the anti-fingerprint layer.

2. The black film of claim 1, wherein the reinforcing layer comprises at least one of alumina and silica-alumina, and wherein the reinforcing layer has a thickness of 100nm or less.

3. The black film of claim 1, wherein the anti-fingerprint layer has a thickness of 15nm to 50nm and a contact angle of greater than 115 °.

4. The black film of claim 1, further comprising a tie layer disposed between the anti-fingerprint layer and the anti-reflection film layer.

5. The black film according to claim 4, wherein the thickness of the connection layer is 8nm to 15nm, and the material of the connection layer comprises silicon dioxide.

6. The black film of claim 1, wherein the antireflection film layer is formed by alternately laminating a first optical film layer and a second optical film layer, the first optical film layer and the second optical film layer having different refractive indices.

7. The black film of claim 6, wherein the first optical film comprises at least one of titanium oxide, titanium pentoxide, tantalum oxide and zirconium oxide, and the second optical film comprises at least one of silicon monoxide, silicon dioxide, aluminum oxide and magnesium fluoride.

8. The black film according to claim 1, wherein the thickness of the black film is 1 μm or less.

9. The black film according to claim 1, wherein the black film has a pencil hardness of 4H or more and a reflectance of less than 1% at a wavelength of 420nm to 780 nm.

10. A method for preparing a black film, comprising:

respectively forming an anti-reflection film layer and an enhancement layer by adopting a vapor deposition method, wherein the anti-reflection film layer and the enhancement layer are arranged in a laminated manner, and the reflectivity of the anti-reflection film layer under the wavelength of 420nm-780nm is lower than 1%;

and forming an anti-fingerprint layer on the surface of the anti-reflection film layer or the enhancement layer to obtain the black film.

11. The lens barrel is characterized by comprising a lens barrel body and a black film arranged on the surface of the lens barrel body, wherein the black film comprises a reflection reducing film layer, an enhancement layer and an anti-fingerprint layer, the reflectivity of the reflection reducing film layer under the wavelength of 420nm-780nm is lower than 1%, the reflection reducing film layer is arranged between the enhancement layer and the anti-fingerprint layer, or the enhancement layer is arranged between the reflection reducing film layer and the anti-fingerprint layer.

12. The utility model provides a camera, its characterized in that, includes lens cone and camera lens, the lens cone includes lens cone body and sets up the black film on lens cone body surface, the black film is including subtracting anti-membrane layer, enhancement layer and anti fingerprint layer, the reflectivity of subtracting anti-membrane layer under 420nm-780nm wavelength is less than 1%, subtract anti-membrane layer setting in the enhancement layer with between the anti fingerprint layer, or the enhancement layer sets up subtract anti-membrane layer with between the anti fingerprint layer, the lens cone body has into unthreaded hole, the camera lens with go into the unthreaded hole and correspond the setting.

13. The electronic equipment is characterized by comprising a camera, wherein the camera comprises a lens barrel and a lens, the lens barrel comprises a lens barrel body and a black film arranged on the surface of the lens barrel body, the black film comprises an antireflection film layer, an enhancement layer and an anti-fingerprint layer, the reflectivity of the antireflection film layer under the wavelength of 420nm-780nm is lower than 1%, the antireflection film layer is arranged between the enhancement layer and the anti-fingerprint layer, or the enhancement layer is arranged between the antireflection film layer and the anti-fingerprint layer, the lens barrel body is provided with an entrance hole, and the lens and the entrance hole are correspondingly arranged.

Technical Field

The application belongs to the technical field of electronic products, and particularly relates to a black film, a preparation method thereof, a lens cone, a camera and electronic equipment.

Background

With the continuous development of electronic devices, users have higher and higher shooting and imaging requirements on the electronic devices. In the related art, when a camera is used for shooting, stray light is caused by reflected light on the surface of a lens barrel, and the imaging quality of the camera is affected.

Disclosure of Invention

In view of this, the present application provides a black film having low reflectance, excellent internal bonding force, excellent wear resistance and scratch resistance, which can be used on the surface of a lens barrel to reduce the influence of reflected light on image formation, while having a long service life; the lens cone and the camera with the black film have good shooting quality and good imaging quality.

In a first aspect, the present application provides a black film, including an anti-reflection film layer, an enhancement layer, and an anti-fingerprint layer, wherein the anti-reflection film layer has a reflectivity of less than 1% at a wavelength of 420nm to 780nm, the anti-reflection film layer is disposed between the enhancement layer and the anti-fingerprint layer, or the enhancement layer is disposed between the anti-reflection film layer and the anti-fingerprint layer.

In a second aspect, the present application provides a method for preparing a black film, comprising:

respectively forming an anti-reflection film layer and an enhancement layer by adopting a vapor deposition method, wherein the anti-reflection film layer and the enhancement layer are arranged in a laminated manner, and the reflectivity of the anti-reflection film layer under the wavelength of 420nm-780nm is lower than 1%;

and forming an anti-fingerprint layer on the surface of the anti-reflection film layer or the enhancement layer to obtain the black film.

In a third aspect, the present application provides a lens barrel, including a lens barrel body and a black film disposed on a surface of the lens barrel body, where the black film includes an anti-reflection film layer, an enhancement layer, and an anti-fingerprint layer, a reflectivity of the anti-reflection film layer at a wavelength of 420nm to 780nm is lower than 1%, and the anti-reflection film layer is disposed between the enhancement layer and the anti-fingerprint layer, or the enhancement layer is disposed between the anti-reflection film layer and the anti-fingerprint layer.

In a fourth aspect, the present application provides a camera, including lens cone and camera lens, the lens cone includes the lens cone body and sets up the black membrane on lens cone body surface, the black membrane is including subtracting anti-rete, enhancement layer and anti fingerprint layer, it is less than 1% to subtract reflectivity of anti-rete under 420nm-780nm wavelength, it sets up to subtract anti-rete the enhancement layer with between the anti fingerprint layer, or the enhancement layer sets up subtract anti-rete with between the anti fingerprint layer, the lens cone body has into unthreaded hole, the camera lens with it corresponds the setting to go into the unthreaded hole.

In a fifth aspect, the present application provides an electronic device, including a camera, the camera includes lens cone and camera lens, the lens cone includes the lens cone body and sets up the black membrane on lens cone body surface, the black membrane includes antireflection rete, enhancement layer and anti-fingerprint layer, the reflectance of antireflection rete under 420nm-780nm wavelength is less than 1%, antireflection rete sets up the enhancement layer with between the anti-fingerprint layer, or the enhancement layer sets up antireflection rete with between the anti-fingerprint layer, the lens cone body has into the unthreaded hole, the camera lens with it corresponds the setting to go into the unthreaded hole.

The application provides a black film, wherein the anti-reflection film layer is low in reflectivity, reflected light can be reduced, stray light is avoided in the shooting process, the hardness of the enhancement layer is good, the bonding force between the enhancement layer and the anti-reflection film layer is strong, the wear resistance of the anti-fingerprint layer is good, the enhancement layer and the anti-fingerprint layer can play a role in protecting the anti-reflection film layer, the hardness, the wear resistance and the wiping resistance of the black film are improved, and the service life of the black film is prolonged; the preparation method of the black film is simple, the process is mature, the raw material source is wide, and the industrial production is facilitated; the lens cone, the camera and the electronic equipment with the black film furthest reduce the influence of stray light on the shooting effect in the shooting process and improve the imaging quality.

Drawings

In order to more clearly explain the technical solution in the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be described below.

Fig. 1 is a schematic structural diagram of a black film according to an embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of a black film according to another embodiment of the present disclosure.

Fig. 3 is a schematic structural diagram of a black film according to another embodiment of the present disclosure.

Fig. 4 is a schematic structural diagram of a black film according to another embodiment of the present disclosure.

Fig. 5 is a schematic structural diagram of a lens barrel according to an embodiment of the present application.

Fig. 6 is a schematic structural diagram of a camera according to an embodiment of the present application.

Fig. 7 is a top view of a camera head according to another embodiment of the present disclosure.

Fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Description of reference numerals:

the anti-reflection film layer-10, the enhancement layer-20, the anti-fingerprint layer-30, the connecting layer-40, the black film-100, the lens cone body-101, the light inlet hole-102, the lens cone-200, the lens-300 and the camera-400.

Detailed Description

The following is a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present application, and these improvements and modifications are also considered as the protection scope of the present application.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Referring to fig. 1, which is a schematic structural diagram of a black film according to an embodiment of the present disclosure, a black film 100 includes a reflection reducing film layer 10, a reinforcing layer 20, and an anti-fingerprint layer 30, a reflectivity of the reflection reducing film layer 10 at a wavelength of 420nm to 780nm is lower than 1%, and the reflection reducing film layer 10 is disposed between the reinforcing layer 20 and the anti-fingerprint layer 30. Please refer to fig. 2, which is a schematic structural diagram of a black film according to another embodiment of the present disclosure, wherein a reinforcing layer 20 is disposed between a reflection reducing film layer 10 and an anti-fingerprint layer 30. In the application, the reflectivity of the black film 100 under the wavelength of 420nm-780nm is lower than 0.5% by arranging the anti-reflection film layer 10, and when the anti-reflection film is applied to the surface of the lens barrel 200, the reflected light can be greatly reduced, so that the generation of stray light is avoided, and the shooting quality is improved; the enhancement layer 20 can improve the hardness of the black film 100 and protect the antireflection film layer 10; the anti-fingerprint layer 30 has excellent wear resistance, can also protect the anti-reflection film layer 10, prevents the anti-reflection film layer 10 from falling off, and ensures the extremely low reflectivity and the visual black effect of the black film 100; the three-layer structure is interacted, the binding force is excellent, the black film 100 has extremely low reflectivity, and the hardness, the wear resistance, the wiping resistance and the internal stability of the black film 100 are improved while the black film is in absolute black.

In the application, the reflectivity of the anti-reflection film layer 10 under the wavelength of 420nm-780nm is lower than 1%, and the most incident light can be absorbed, so that the reflected light is reduced, and the anti-reflection film layer 10 and the black film 100 are black in vision, saturated in color and high in texture. Further, the reflectivity of the antireflection film layer 10 at the wavelength of 420nm-780nm is lower than 0.5%.

In the embodiment of the present application, the material of the anti-reflection coating layer 10 may be an inorganic substance, and the inorganic substance includes at least one of a simple metal, an inorganic oxide, and an inorganic fluoride. In one embodiment, the material of the anti-reflection film layer 10 includes at least one of a metal simple substance, an inorganic oxide, and an inorganic fluoride. Further, the inorganic oxide includes at least one of a metal oxide and a non-metal oxide. Specifically, the metal simple substance may be, but is not limited to, aluminum, yttrium, germanium, and the like, the inorganic oxide may be, but is not limited to, magnesium oxide, titanium dioxide, titanium pentoxide, silicon dioxide, silicon monoxide, zirconium dioxide, aluminum oxide, tantalum pentoxide, and niobium monoxide, and the inorganic fluoride may be, but is not limited to, magnesium fluoride, calcium fluoride, and the like. In another embodiment, the antireflection film layer 10 may be formed by, but not limited to, vapor deposition, such as physical vapor deposition or chemical vapor deposition, and specifically, the multilayer optical film layer is formed by, for example, low pressure chemical vapor deposition, atmospheric pressure chemical vapor deposition, evaporation, sputtering, ion plating, etc. to obtain the antireflection film layer 10.

In the present embodiment, the antireflection film 10 is formed by alternately stacking at least two light ends having different refractive indexes. Further, the antireflection film 10 is formed by periodically and alternately laminating at least two light ends films with different refractive indexes. In one embodiment, the antireflection film 10 is formed by alternately stacking a first optical film and a second optical film, which have different refractive indexes. Further, the antireflection film layer 10 is formed by alternately laminating the first optical film layer and the second optical film layer periodically. It can be understood that the combination of one first optical thread film layer and one second optical film layer is one period; in the antireflection film 10, the materials of the plurality of first optical film layers may be the same or different, and the materials of the plurality of second optical film layers may be the same or different. Further, the number of cycles is 2-10. Specifically, the number of cycles can be, but is not limited to, 2, 3, 4, 5, 6, 7, 8, 9, or 10, and is selected according to the actual needs and reflectivity requirements. In another embodiment, the antireflection film layer 10 is formed by alternately laminating a first optical film layer and a second optical film layer, and the refractive index of the first optical film layer is greater than that of the second optical film layer. By arranging the structure of alternately stacking the high refractive index and the low refractive index, the antireflection film layer 10 is favorable for absorbing light. Optionally, the material of the first optical film layer includes at least one of titanium oxide, titanium pentoxide, tantalum oxide, and zirconium oxide, and the material of the second optical film layer includes at least one of silicon monoxide, silicon dioxide, aluminum oxide, and magnesium fluoride. In a specific embodiment, the anti-reflection coating 10 includes a silicon dioxide layer, a titanium oxide layer, a silicon dioxide layer and a titanium oxide layer, which are stacked, wherein the silicon dioxide layer is disposed on the surface of the enhancement layer 20. In another embodiment, the anti-reflection coating 10 includes a silicon dioxide layer, a titanium oxide layer, a silicon dioxide layer, and a titanium oxide layer, which are stacked, wherein the titanium oxide layer is disposed on the surface of the enhancement layer 20. In yet another specific embodiment, the antireflection film layer 10 includes a silica layer, a zirconia layer, a silica layer, and a zirconia layer, which are stacked.

In the embodiment of the present application, the thickness of the anti-reflection film layer 10 is 100nm to 800nm, and by providing the anti-reflection film layer 10 having a nano-scale thickness, it is possible to achieve an absolute black visual effect without increasing the thickness of the black film 100 too much. Further, the thickness of the anti-reflection film layer 10 is 180nm-720 nm. Specifically, the thickness of the anti-reflection coating 10 may be, but not limited to, 150nm, 200nm, 350nm, 400nm, 500nm, 600nm, 750nm, or the like. In the present application, the antireflection film layer 10 is formed by laminating a plurality of optical film layers, and the thickness and material of each optical film layer are controlled to realize an absolute black color. In one embodiment, the optical film has a thickness of 5nm to 100 nm. Further, the thickness of the optical film layer is 35nm-75 nm. Further, the thickness of the optical film layer is 35nm-50 nm. Specifically, the thickness of the optical film layer may be, but not limited to, 5nm, 10nm, 35nm, 40nm, 45nm, 50nm, 65nm, 70nm, 85nm, 90nm, or the like. In a specific embodiment, the anti-reflection coating 10 includes a silicon dioxide layer, a titanium oxide layer, a silicon dioxide layer and a titanium oxide layer, which are stacked, wherein the silicon dioxide layer has a thickness of 60nm to 90nm, and the titanium oxide layer has a thickness of 30nm to 75 nm.

In the present application, the reinforcing layer 20 has high hardness, and can increase the hardness of the black film 100; meanwhile, the binding force with the anti-reflection film layer 10 is strong, so that the anti-reflection film layer 10 can be prevented from being separated during wiping and abrasion, and the stability of the whole structure of the black film 100 is ensured. It is understood that the black film 100 has an inner surface and an outer surface that are oppositely disposed. In an embodiment, when the enhancement layer 20 is closer to the outer surface of the black film 100 than the antireflection film layer 10, the enhancement layer 20 can also improve the protection effect on the antireflection film layer 10, prevent abrasion and wiping of the antireflection film layer 10, and ensure that the black film 100 presents an absolute black color. In another embodiment, the reinforcing layer 20 is closer to the inner surface of the black film 100 than the antireflection film layer 10.

In the embodiment of the present application, the material of the reinforcing layer 20 includes at least one of aluminum oxide and silicon aluminum. By using alumina and/or silica-alumina materials, the hardness and wear resistance of the reinforcement layer 20 are improved.

In the embodiment of the present application, the thickness of the reinforcing layer 20 is 100nm or less. That is, the thickness of the reinforcing layer 20 is less than or equal to 100nm, so that the reinforcing layer 20 is better combined with the antireflection film, while increasing the hardness of the black film 100 without excessively increasing the brittleness of the black film 100, so that the black film 100 has excellent mechanical properties. Further, the thickness of the enhancement layer 20 is 10nm to 100 nm. Further, the thickness of the enhancement layer 20 is 20nm to 85 nm. Specifically, the thickness of the enhancement layer 20 may be, but is not limited to, 15nm, 25nm, 30nm, 40nm, 50nm, 60nm, 75nm, 80nm, 95nm, or 100 nm. In an embodiment, when the enhancement layer 20 is closer to the outer surface of the black film 100 than the anti-reflection film layer 10, the thickness of the enhancement layer 20 is greater than 35nm, and the enhancement layer 20 is used for preventing the anti-reflection film layer 10 from being worn, and the enhancement layer 20 within the thickness range has excellent wear resistance, so as to prevent external force from directly acting on the surface of the anti-reflection film layer 10, and prolong the service life of the black film 100. Further, the thickness of the reinforcing layer 20 is 45nm to 100 nm. Further, the thickness of the enhancement layer 20 is 50nm to 85 nm. In another embodiment, when the reinforcing layer 20 is closer to the inner surface of the black film 100 than the anti-reflection film layer 10, the thickness of the reinforcing layer 20 is less than 35nm, and at this time, the reinforcing layer 20 is used to improve the bonding force and the overall hardness inside the black film 100, and the reinforcing layer 20 within this thickness range can form a higher bonding force with the anti-reflection film layer 10, prevent the anti-reflection film layer 10 from falling off, and improve the wear resistance and wiping resistance of the black film 100. Further, the thickness of the enhancement layer 20 is 10nm to 35 nm. Further, the thickness of the enhancement layer 20 is 12nm to 30 nm.

In the embodiment of the present application, the enhancement layer 20 can be formed by vapor deposition, such as physical vapor deposition or chemical vapor deposition, specifically, atmospheric pressure chemical vapor deposition, evaporation, sputtering, ion plating, and the like. In one embodiment, the enhancement layer 20 is formed by magnetron sputtering, which includes forming an aluminum oxide enhancement layer on the surface of the substrate by using aluminum as a target material and introducing argon and oxygen. The substrate may be, but not limited to, the antireflection film layer 10, the lens barrel 200, or the like. In another embodiment, the aluminum oxide reinforced layer is formed on the surface of the substrate by vacuum evaporation with aluminum oxide as the evaporation material and oxygen as the compensation gas. In another embodiment, the reinforced layer 20 is formed by magnetron sputtering, which includes forming the reinforced layer 20 of silicon-aluminum material on the surface of the substrate by using silicon-aluminum as a target material and introducing argon and nitrogen. Specifically, the voltage of magnetron sputtering can be but is not limited to 450V-500V, the current can be but is not limited to 75A-80A, and the power can be but is not limited to 25kW-35 kW.

In the present embodiment, the black film 100 includes a reinforcing layer 20, an antireflection film, a reinforcing layer 20, and an anti-fingerprint layer 30, which are stacked. That is to say, both sides of the anti-reflection film are provided with the enhancement layer 20, so that the bonding force between the enhancement layer 20 and the anti-reflection film is strong, the stability of the whole structure of the black film 100 is improved, the hardness of the black film 100 is also improved, and meanwhile, the enhancement layer 20 close to the outer surface plays a role in protecting the anti-reflection film, and the hardness and the tolerance of the black film 100 are improved.

In this application, through setting up anti fingerprint layer 30, improve the resistant fingerprint effect of black membrane 100, further promote the wear-resisting and resistant performance of wiping of black membrane 100 simultaneously, increase of service life. In order for the anti-fingerprint layer 30 to function, the anti-fingerprint layer 30 is closer to the outer surface of the black film 100 than the antireflection film layer 10 and the reinforcing layer 20.

In this application, have hydrophobic oleophobic group in the anti-fingerprint layer 30, reduced black membrane 100's surface energy through hydrophobic oleophobic group, improved black membrane 100's waterproof, grease proofing, anti-fingerprint performance, can form bond energy between hydrophobic oleophobic group and enhancement layer 20 or the antireflection rete 10 simultaneously, improve black membrane 100's wear resistance. In the present embodiment, the material of the fingerprint-resistant layer 30 includes a fluorine-containing compound. Specifically, the fluorine-containing compound may be, but not limited to, fluorosilicone resin, perfluoropolyether, fluoroacrylate, and the like. Further, the material of the fingerprint resistant layer 30 further includes silicon dioxide, and the friction resistance of the fingerprint resistant layer 30 is further improved by adding the silicon dioxide. In the present application, the anti-fingerprint layer 30 may be formed by spraying. In one embodiment, the fingerprint-resistant liquid is provided and is sprayed and cured to form the fingerprint-resistant layer 30. Further, the curing comprises baking at 80-200 ℃ for 2-10 min. In another embodiment, the anti-fingerprint layer 30 is formed by evaporation.

In the present embodiment, the thickness of the anti-fingerprint layer 30 is 15nm to 50 nm. When the thickness is less than 15nm, the fingerprint resistance effect of the black film 100 can be improved, but the improvement on the wear resistance and the wiping resistance of the black film 100 is limited, when the thickness is more than 50nm, the thickness of the black film 100 is excessively increased, light rays may be excessively reflected on the surface of the fingerprint resistance layer 30, and the reduction of the reflectivity of the black film 100 is not facilitated; therefore, through the anti-fingerprint layer 30 that sets up above-mentioned thickness, promote the waterproof, grease proofing, anti-fingerprint performance of black membrane 100 greatly, promote the wear resistance of black membrane 100 simultaneously, play the guard action to subtracting the anti-membrane, guarantee to subtract the reflectivity of anti-membrane unchangeable, maintain the super black of black membrane 100. Further, the thickness of the fingerprint resistant layer 30 is 30nm to 50 nm. Further, the fingerprint resistant layer 30 has a thickness of 35nm to 42 nm. Specifically, the thickness of the anti-fingerprint layer 30 may be, but is not limited to, 20nm, 30nm, 32nm, 35nm, 38nm, 40nm, 45nm, 47nm, and 50 nm.

In the present embodiment, the contact angle of the anti-fingerprint layer 30 is greater than 115 °. The contact angle is an important parameter for measuring the wettability of the material surface by the liquid, and the contact angle of the fingerprint-resistant layer 30 is larger than 115 degrees, which shows that the liquid can easily move on the fingerprint-resistant layer 30, thereby avoiding the pollution to the surface of the liquid and having excellent fingerprint-resistant performance.

In the present embodiment, the black film 100 further includes a connection layer 40. The connecting layer 40 is used for connecting the anti-fingerprint layer 30 with other layer structures of the black film 100, so that the bonding force between the anti-fingerprint layer 30 and other layer structures is improved; meanwhile, after the anti-fingerprint layer 30 is worn, the connection layer 40 can also play a role in wear resistance, so that the anti-reflection film is protected, and the absolute black color of the black film 100 is maintained.

In one embodiment of the present application, the connection layer 40 is disposed between the fingerprint-resistant layer 30 and the reflection reducing film layer 10. That is to say, the connecting layer 40 can be attached to the anti-fingerprint layer 30 and the anti-reflection film layer 10, so that the binding force between the anti-fingerprint layer 30 and the anti-reflection film is improved, the anti-fingerprint layer 30 is prevented from falling off, and the anti-reflection film is protected; the connecting layer 40 can also be attached to the anti-fingerprint layer 30 and the enhancement layer 20, so that the bonding force between the anti-fingerprint layer 30 and the enhancement layer 20 is improved, and the anti-fingerprint layer 30 is prevented from falling off.

Referring to fig. 3, a schematic structural diagram of a black film according to another embodiment of the present disclosure is different from fig. 1 in that the black film further includes a connection layer 40, and the connection layer 40 is disposed between the fingerprint-resistant layer 30 and the reflection reducing film layer 10. In the embodiment of the application, at least two optical film layers with different refractive indexes are included in the antireflection film; when the anti-reflection film comprises a silicon dioxide layer and the anti-fingerprint layer 30 is arranged on the surface of the silicon dioxide layer, the connecting layer 40 is not required to be arranged between the anti-fingerprint layer 30 and the silicon dioxide layer, and a chemical bond can be generated between the silicon dioxide layer and the anti-fingerprint layer 30, so that the adhesive force of the anti-fingerprint layer 30 is improved, and the connecting layer 40 can be arranged between the anti-fingerprint layer 30 and the silicon dioxide layer. Please refer to fig. 4, which is a schematic structural diagram of a black film according to another embodiment of the present disclosure, and it is different from fig. 2 in that it further includes a connection layer 40, and the connection layer 40 is disposed between the anti-fingerprint layer 30 and the enhancement layer 20.

In the present embodiment, the material of the connection layer 40 includes silicon dioxide. Through the connecting layer 40 with the silicon dioxide, a chemical bond is formed between the connecting layer 40 and the anti-fingerprint layer 30, the bonding force between the connecting layer 40 and the anti-fingerprint layer 30 is improved, and meanwhile, the bonding force between the connecting layer and the anti-reflection film layer 10 or the enhancement layer 20 is high, so that the stability and the tolerance of the whole structure of the black film 100 are ensured.

In the present embodiment, the connection layer 40 has a thickness of 8nm to 15 nm. The connecting layer 40 has too small thickness, the number of chemical bonds generated between the connecting layer 40 and the fingerprint-resistant layer 30 is limited, the binding force is general, and the too large thickness of the connecting layer 40 can enhance the reflection of the surface of the connecting layer on light and influence the black effect of the black film 100; therefore, the connection layer 40 within the above range can improve the structural stability of the black film 100, and ensure the appearance of the absolute black visual effect of the black film 100. Further, the thickness of the connection layer 40 is 9nm to 15 nm. Further, the thickness of the connection layer 40 is 10nm to 14 nm. Specifically, the thickness of the connection layer 40 may be, but is not limited to, 8.5nm, 9nm, 10nm, 11nm, 12nm, 12.5nm, 13nm, 14nm, or 15 nm.

In the present embodiment, the thickness of the black film 100 is 1 μm or less. The black film 100 has a stable internal structure, good hardness, and excellent abrasion and wiping resistance. Further, the thickness of the black film 100 is 500nm to 1000 nm. Further, the thickness of the black film 100 is 650nm to 900 nm. Specifically, the thickness of the black film 100 may be, but is not limited to, 500nm, 550nm, 600nm, 700nm, 850nm, 900nm, or 1000 nm.

In the embodiment of the present application, the pencil hardness of the black film 100 is 4H or more. Further, the pencil hardness of the black film 100 is 4H to 6H. Specifically, the pencil hardness of the black film 100 may be, but is not limited to, 4H, 5H, or 6H. Wherein the pencil hardness test comprises pressing the tip of the pencil downward at 45 ° against the surface of the black film 100 under a load of 750g, and sliding in different directions for a distance of at least 7 mm; the hardness values were recorded starting with the hardest pencil and proceeding from hard to soft one by one until a pencil was found in which the black film 100 was not scratched.

In the present embodiment, the black film 100 has a reflectance of less than 1% at a wavelength of 420nm to 780 nm. Further, the reflectance of the black film 100 at a wavelength of 420nm to 780nm is less than 0.5%. In the present application, the reflectance is a reflectance at a wavelength of 420nm to 780 nm. The utility model provides a reflectivity of black membrane 100 is low, can present absolute black in the vision, all can present to be black under different light and incident light angle, the colour is saturated, feel is senior, when the black coating film sets up on lens cone 200, can realize integrative black, the phenomenon of the lens cone 200 that has the coating film under different light and incident light angle of having avoided sending grey, promote whole vision uniformity, and the hardness is high, it is wear-resisting, it wipes to wipe off resistant, be favorable to long-term the use.

The present application further provides a method for preparing the black film 100, which includes:

operation 101: the anti-reflection film layer and the enhancement layer are respectively formed by adopting a vapor deposition method, the anti-reflection film layer and the enhancement layer are arranged in a laminated mode, and the reflectivity of the anti-reflection film layer under the wavelength of 420nm-780nm is lower than 1%.

Operation 102: and forming an anti-fingerprint layer on the surface of the anti-reflection film layer or the reinforced layer to obtain the black film.

In the embodiment of the present application, the antireflection film layer 10 may be formed by physical vapor deposition or chemical vapor deposition, specifically, a multilayer optical film layer is formed by low pressure chemical vapor deposition, atmospheric pressure chemical vapor deposition, evaporation, sputtering, ion plating, etc., so as to obtain the antireflection film layer 10.

In the embodiment of the present application, the enhancement layer 20 can be formed by physical vapor deposition or chemical vapor deposition, such as atmospheric pressure chemical vapor deposition, evaporation, sputtering, ion plating, and the like. The anti-reflection film layer 10 or the enhancement layer 20 prepared by vapor deposition can be well attached to the surface of the enhancement layer 20 or the anti-reflection film layer 10, and the bonding force is good.

In one embodiment of the present application, the anti-fingerprint layer 30 may be formed by evaporation. In another embodiment of the present application, the anti-fingerprint layer 30 may be formed by spraying and curing. Further, a molding connection layer 40 is included before molding the anti-fingerprint layer 30. In one embodiment, the connecting layer 40 can be formed by evaporation, sputtering, ion plating, or the like.

The present application also provides a lens barrel 200 including the black film 100 of any of the above embodiments. In the shooting process, light rays pass through the lens barrel 200 and enter the lens 300, and stray light is generated in the light rays entering the lens 300 due to the fact that the surface of the lens barrel 200 is also reflected, and the shooting effect is further influenced. Through set up black film 100 on lens cone 200 surface, can effectively reduce the reflection of lens cone 200 surface to light, avoid the influence of stray light to the shooting, this black film 100's hardness is high simultaneously, wear-resisting, it is good to wipe resistance, can effectively avoid the influence that external factor appears the color effect to black film 100 in the use, guarantees extremely low reflectivity, maintains long-time excellent shooting quality. Referring to fig. 5, which is a schematic structural diagram of a lens barrel according to an embodiment of the present disclosure, a lens barrel 200 includes a lens barrel body 101 and a black film 100 disposed on a surface of the lens barrel body 101. It will be appreciated that the black film 100 is disposed on a surface that reflects light. In one embodiment, the lens barrel body 101 has a light entrance hole 102, so that in cooperation with the lens 300, the black film 100 is disposed around the light entrance hole 102.

In the present application, the material of the lens barrel body 101 is not limited, and may be, but not limited to, plastic or the like. In the embodiment of the present application, the lens barrel body 101 is black, so as to further reduce the reflection of light by the lens barrel 200. In the embodiment of the present application, the lens barrel body 101 may be placed in a coater, and the black film 100 may be formed on the surface thereof.

In the present application, the black film 100 may be directly prepared on the surface of the lens barrel body 101, or may be connected to the black film 100 through an adhesive layer. In one embodiment of the present application, the adhesion between the black film 100 and the lens barrel body 101 is greater than 4B and the performance is excellent when the surface of the lens barrel 200 is checked by the one-hundred-grid method.

The present application further provides a camera 400 including the lens barrel 200 described above. The lens barrel 200 has an extremely low light reflection effect, and does not affect the shooting of the lens 300, so that the camera 400 has a good shooting effect. Referring to fig. 6, which is a schematic structural diagram of a camera according to an embodiment of the present disclosure, a camera 400 includes a lens barrel 200 and a lens 300, the lens barrel 200 includes a lens barrel body 101 and a black film 100 disposed on a surface of the lens barrel body 101, the lens barrel body 101 has a light entrance hole 102, and the lens 300 is disposed corresponding to the light entrance hole 102. Referring to fig. 7, which is a top view of a camera according to another embodiment of the present disclosure, a camera 400 includes a lens barrel 200 and a lens 300, the lens barrel 200 includes a lens barrel body 101 and a black film 100 disposed on a surface of the lens barrel body 101, the lens barrel body 101 has a light entrance hole 102, and the lens 300 is disposed corresponding to the light entrance hole 102.

In the embodiment of the present application, the camera 400 further includes a lens disposed on the surface of the lens barrel 200 and corresponding to the lens 300. By arranging the lens, the lens 300 is protected, and the service life of the camera 400 is prolonged.

The application also provides an electronic device comprising the camera 400. It is understood that the electronic device may be, but is not limited to, a cell phone, a tablet, a laptop, a watch, MP3, MP4, GPS navigator, digital camera, etc. The following description will be given taking a mobile phone as an example. Please refer to fig. 8, which is a schematic structural diagram of an electronic device according to an embodiment of the present application, where the electronic device includes a camera 400; the camera 400 includes a lens barrel 200 and a lens 300, the lens barrel 200 includes a lens barrel body 101 and a black film 100 disposed on a surface of the lens barrel body 101, the lens barrel body 101 has a light entrance hole 102, and the lens 300 is disposed corresponding to the light entrance hole 102. The application provides an electronic equipment is when shooing, and the parasitic light influence is little, and it is good to shoot the effect, is favorable to its use.

Example 1

A black film is arranged on the surface of a base material, and the black film comprises a 100nm aluminum oxide layer, a 29nm titanium oxide layer, a 16nm silicon dioxide layer, an 11nm titanium oxide layer, a 60nm silicon dioxide layer, a 75nm titanium oxide layer, a 38nm silicon dioxide layer and a 30nm anti-fingerprint layer which are arranged on the base material in sequence.

Example 2

The same as example 1 except that the 100nm alumina layer was replaced with a 56nm silicon aluminum layer.

Example 3

A black film is arranged on the surface of a base material, and the black film comprises a 100nm aluminum oxide layer, a 24nm silicon dioxide layer, a 22nm titanium oxide layer, a 12nm silicon dioxide layer, a 74nm titanium oxide layer, a 97nm silicon dioxide layer, a 28nm titanium oxide layer, an 8nm silicon dioxide layer and a 30nm anti-fingerprint layer which are arranged on the base material in sequence.

Example 4

A black film is arranged on the surface of a base material, and the black film comprises a 16nm silicon dioxide layer, a 29nm titanium oxide layer, a 60nm silicon dioxide layer, an 11nm titanium oxide layer, a 38nm silicon dioxide layer, a 75nm titanium oxide layer, a 100nm aluminum oxide layer, an 8nm silicon dioxide layer and a 30nm anti-fingerprint layer which are arranged on the base material in sequence.

Example 5

A black film is arranged on the surface of the base material, and the black film comprises a 56nm silicon aluminum layer, a 16nm silicon dioxide layer, a 29nm titanium oxide layer, a 60nm silicon dioxide layer, an 11nm titanium oxide layer, a 38nm silicon dioxide layer, a 75nm titanium oxide layer, an 8nm silicon dioxide layer and a 30nm anti-fingerprint layer which are arranged on the base material in sequence.

Comparative example 1

A black film is provided on the surface of a substrate, and the black film comprises a 29nm titanium oxide layer, a 16nm silicon dioxide layer, an 11nm titanium oxide layer, a 60nm silicon dioxide layer, a 75nm titanium oxide layer and a 38nm silicon dioxide layer which are provided on the substrate in this order.

Comparative example 2

A black film is arranged on the surface of a base material, and the black film comprises a 24nm silicon dioxide layer, a 22nm titanium oxide layer, a 12nm silicon dioxide layer, a 74nm titanium oxide layer, a 97nm silicon dioxide layer, a 28nm titanium oxide layer and a 15nm anti-fingerprint layer which are arranged on the base material in sequence.

Comparative example 3

A black film is arranged on the surface of a base material, and the black film comprises a 24nm silicon dioxide layer, a 22nm titanium oxide layer, a 12nm silicon dioxide layer, a 74nm titanium oxide layer, a 97nm silicon dioxide layer, a 28nm titanium oxide layer, a 12nm silicon dioxide layer and a 15nm anti-fingerprint layer which are arranged on the base material in sequence.

Comparative example 4

A black film is arranged on the surface of a base material, and the black film comprises a 100nm aluminum oxide layer, a 24nm silicon dioxide layer, a 22nm titanium oxide layer, a 12nm silicon dioxide layer, a 74nm titanium oxide layer, a 97nm silicon dioxide layer and a 28nm titanium oxide layer which are arranged on the base material in sequence.

Effects of the embodiment

The reflectivity, pencil hardness and wear resistance of the black films prepared in the above examples and comparative examples are detected, wherein the maximum reflectivity under the wavelength of 420nm-780nm is detected by a reflectivity tester, and the wear resistance test method comprises the steps of mounting the product on a test table, starting the stroke position of the wear resistance tester to make the motion stroke of the test head on the test table completely within a range; the position of a test head for installing the eraser is exposed by 5mm, the area of the steel wool is consistent with the size of the test head, and the steel wool needs to be smooth and locked or adhered tightly; the testing surface of the rubber and the steel wool is required to be flat and not to be concave-convex or inclined, the path of the steel wool is consistent with the stroke direction of the testing table, and the square edge of the testing head is parallel to the table top; the testing head and the load-bearing handle rotate to descend until the distance between the bottom end face of the weight and the upper surface of the lifting table board is 1.5cm, the clamping position of the weight is aligned, and the weight can not be exposed beyond the clamping position; after the test, the product is taken out, the test position can be marked by oiliness, then the angle after abrasion resistance is tested by a water drop contact angle tester, the water drop contact angle on the surface of the black film is detected to evaluate the abrasion resistance, the change of the water drop contact angle before and after the abrasion resistance test is within 2 degrees to evaluate the abrasion resistance to be strong, the abrasion resistance is evaluated to be good within 5 degrees, the abrasion resistance is evaluated within 10 degrees generally, the abrasion resistance is evaluated to be poor within 15 degrees, and the result is shown in table 1.

TABLE 1 test results

Compared with a comparative example, the black film provided by the embodiment of the application has the advantages that the reflectivity is lower, the pencil hardness and the wear resistance are excellent, the service life of the black film is prolonged, and the application in electronic equipment is facilitated.

The foregoing detailed description has provided for the embodiments of the present application, and the principles and embodiments of the present application have been presented herein for purposes of illustration and description only and to facilitate understanding of the methods and their core concepts; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.