Anti-fog sheet, back cover assembly, camera module and electronic device

Abstract

The application provides an anti-fog sheet, a back cover assembly, a camera module and an electronic device. The anti-fog sheet provided by the application comprises a main body and a moisture-absorbing film arranged on at least part of the surface of the main body, wherein the moisture-absorbing film has moisture-absorbing property. When the anti-fog sheet provided by the application is applied to the camera module or the electronic device, the camera of the camera module or the electronic device can be better prevented from fogging, so that the camera module and the electronic device have better shooting effect.

Description

Technical Field

[0001] This application relates to the field of electronics, specifically to an anti-fog film, a back cover assembly, a camera module, and an electronic device. Background Technology

[0002] With the rapid development of mobile communication technology, electronic devices such as mobile phones and tablets have become indispensable in people's daily lives. The camera function of mobile phones and other electronic devices has become one of the most frequently used functions in daily life; therefore, users have increasingly stringent requirements for the photography and video recording capabilities and quality of electronic devices.

[0003] During the production and assembly of electronic devices, to ensure low dust levels, the humidity in the assembly room is typically controlled at a high level (e.g., 50% to 60%). Therefore, after the electronic device is assembled, residual air inside may carry some moisture, which is difficult to release to the outside and thus remains inside. When the ambient temperature is high, or during prolonged use of the camera or other high-power scenarios, the internal temperature of the electronic device rises sharply, causing the remaining water to evaporate back into water vapor. When the external temperature of the electronic device drops rapidly at this time, the temperature of the camera lens area drops sharply, causing the moisture to condense on the lens, resulting in fogging, complete loss of photo-taking function, or a severe decrease in image quality. Summary of the Invention

[0004] This application provides an anti-fog film, which, when applied to a camera module or electronic device, can better prevent fogging of the camera lens, thereby enabling the camera module and electronic device to have better shooting effects.

[0005] In a first aspect, embodiments of this application provide an anti-fog sheet, the anti-fog sheet comprising:

[0006] The main body; and

[0007] A moisture-absorbing membrane is disposed on at least a portion of the surface of the body, and the moisture-absorbing membrane has hygroscopic properties.

[0008] Secondly, embodiments of this application provide a back cover assembly, the back cover assembly comprising:

[0009] Protective lenses; and

[0010] A back cover is disposed around the outer periphery of the protective lens, and at least one of the protective lens and the back cover is the anti-fog film described in the first aspect embodiment of this application.

[0011] Thirdly, embodiments of this application provide an electronic device, the electronic device comprising:

[0012] Display screen;

[0013] A camera module, wherein the camera module has a light-transmitting hole;

[0014] The rear cover assembly according to the second aspect embodiment of this application, wherein the protective lens of the rear cover assembly is disposed corresponding to the camera module, the moisture-absorbing film of the anti-fog film is located between the main body and the display screen, and the moisture-absorbing film is disposed away from the light-transmitting hole; and

[0015] The main processor is electrically connected to both the camera module and the display screen, and is used to control the camera module to take pictures and control the display screen to display.

[0016] Fourthly, embodiments of this application provide a camera module, the camera module comprising:

[0017] Lens tube;

[0018] A lens assembly, the lens assembly being housed within the lens barrel and supported by the lens barrel; and

[0019] A matting film is supported on the lens barrel and disposed on the object side of the lens group. The matting film is the anti-fog film described in the first aspect embodiment. The anti-fog film has a matting area and a light-transmitting area. The moisture-absorbing film is disposed in the matting area and avoids the light-transmitting area.

[0020] Fifthly, embodiments of this application provide an electronic device, which includes:

[0021] Display screen;

[0022] The camera module described in the fourth aspect of this application; and

[0023] The main processor is electrically connected to both the camera module and the display screen, and is used to control the camera module to take pictures and control the display screen to display.

[0024] This application provides an anti-fog sheet comprising a main body and a moisture-absorbing film. The moisture-absorbing film is disposed on at least a portion of the surface of the main body and has hygroscopic properties. When the anti-fog sheet is applied to an electronic device, the moisture-absorbing film can absorb residual water vapor or water mist inside the electronic device, thereby keeping the internal environment of the electronic device relatively dry. When the temperature of the electronic device rises, due to the adsorption effect of the moisture-absorbing film, water vapor or water mist is difficult to escape from the moisture-absorbing film. When the temperature of the electronic device drops sharply, due to the very low internal humidity and extremely low water vapor or water mist content, it is difficult for water vapor or water mist to condense and form small droplets on the light transmission path of the camera module of the electronic device. Therefore, when the anti-fog sheet is applied to an electronic device, it can play a good anti-fogging role for the camera module of the electronic device, making the camera module of the electronic device less prone to fogging in various temperature scenarios, resulting in better shooting effects and improved user experience. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the planar structure of an anti-fog sheet according to an embodiment of this application.

[0027] Figure 2 An embodiment of the anti-fog sheet of this application is along Figure 1 A schematic diagram of a partial cross-sectional view along the AA direction.

[0028] Figure 3 This is a schematic diagram of the planar structure of an anti-fog sheet according to another embodiment of this application.

[0029] Figure 4 An embodiment of the anti-fog sheet of this application is along Figure 3 Schematic diagram of the cross-sectional structure in the middle BB direction.

[0030] Figure 5 This is a schematic diagram of the structure of a microcapsule according to an embodiment of this application.

[0031] Figure 6 This is a cross-sectional structural schematic diagram of a moisture-absorbing membrane according to an embodiment of this application.

[0032] Figure 7 This is a cross-sectional structural schematic diagram of an anti-fog sheet according to another embodiment of this application.

[0033] Figure 8 This is a cross-sectional structural schematic diagram of an anti-fog sheet according to another embodiment of this application.

[0034] Figure 9 This is a cross-sectional structural schematic diagram of an anti-fog sheet according to another embodiment of this application.

[0035] Figure 10 This is a cross-sectional structural schematic diagram of the moisture-absorbing membrane according to another embodiment of this application.

[0036] Figure 11 This is a cross-sectional structural schematic diagram of an anti-fog sheet according to another embodiment of this application.

[0037] Figure 12 This is a cross-sectional structural schematic diagram of an anti-fog sheet according to another embodiment of this application.

[0038] Figure 13 This is a cross-sectional structural schematic diagram of an anti-fog sheet according to another embodiment of this application.

[0039] Figure 14 This is a schematic diagram of the structure of a back cover assembly according to an embodiment of this application.

[0040] Figure 15 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application.

[0041] Figure 16 This is a partial exploded structural diagram of an electronic device according to an embodiment of this application.

[0042] Figure 17 This is a top view of a camera module according to an embodiment of this application.

[0043] Figure 18 This is a circuit block diagram of an electronic device according to an embodiment of this application.

[0044] Figure 19 This is a schematic diagram of the structure of a camera module according to an embodiment of this application.

[0045] Figure 20 This is a partial exploded structural diagram of an electronic device according to another embodiment of this application.

[0046] Explanation of reference numerals in the attached figures:

[0047] 100-Anti-fog film, 10-Main body, 30-Moisture-absorbing film, 30a-Moisture-absorbing ink layer, 31-Microcapsule, 311-Moisture-absorbing core, 3111-Capsule, 312-Capsule wall, 32-Base layer, 33-Adhesive component, 34-Breathable layer, 40-Shielding layer, 50-Substrate layer, 60-First adhesive layer, 60a-Second adhesive layer, 70-First textured layer, 70a-Second textured layer, 80-First coating layer, 80a-Second coating layer Layer, 200-Electronic device, 210-Display, 220-Camera module, 221-Light aperture, 222-Lens barrel, 223-Lens group, 224-Anodizing plate, 101-Anodizing area, 102-Light-transmitting area, 230-Back cover assembly, 231-Protective lens, 2311-First light-transmitting part, 232-Back cover, 240-Main processor, 250-Memory, 260-Middle frame, 270-Housing, 271-Second light-transmitting part. Detailed Implementation

[0048] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0049] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0050] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0051] It should be noted that, for ease of explanation, the same reference numerals denote the same components in the embodiments of this application, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments.

[0052] With the rapid development of mobile communication technology, electronic devices such as mobile phones and tablets have become indispensable in people's daily lives. The camera function of mobile phones and other electronic devices has become one of the most frequently used functions in daily life; therefore, users have increasingly stringent requirements for the photography and video recording capabilities and quality of electronic devices.

[0053] During the production and assembly of electronic devices, to ensure low dust levels, the humidity in the assembly room is typically controlled at a high level (e.g., 50% to 60%). Therefore, after the electronic device is assembled, residual air inside may carry some moisture, which is difficult to release to the outside and thus remains inside. When the ambient temperature is high, or during prolonged use of the camera or other high-power scenarios, the internal temperature of the electronic device rises sharply, causing the remaining moisture to evaporate back into water vapor. When the external temperature of the electronic device drops rapidly at this time, the temperature of the camera lens area drops sharply, causing the moisture to condense on the lens, resulting in fogging, complete loss of photo-taking function, or a severe decrease in image quality.

[0054] In related technologies, a superhydrophobic or superhydrophilic layer is applied to the lens of a camera to prevent water vapor from condensing into small water droplets, thus preventing fogging. However, when a superhydrophobic layer is applied to the lens, its surface has micro-nano structures. Before assembling the lens, it needs to be wiped to remove dirt, white spots, and fibrous material. This wiping action can damage the micro-nano structures on the lens surface, while neglecting to wipe it can increase the rate of defects. On the other hand, superhydrophilic coatings have the problem of excessive adsorption capacity. During the assembly of cameras and electronic devices, they easily attract dust and fibers from the air, leading to a significant decrease in the yield rate of electronic devices.

[0055] In related technologies, a material with higher thermal conductivity than the lens itself can be placed on the outer periphery of the camera lens. When the temperature drops, the area with higher thermal conductivity is more prone to condensation, thus reducing the amount of condensation on the lens and achieving an anti-fogging effect. However, this solution can only alleviate the problem and cannot completely solve the fogging issue on the camera lens surface.

[0056] In related technologies, a resistance wire can be incorporated. When the camera fogs up, heating the resistance wire evaporates small water droplets on the lens surface, thus achieving an anti-fogging effect. However, today's consumers demand extremely thin and small electronic devices, and heating devices would significantly increase the size and weight of these devices.

[0057] Figure 1 This is a schematic diagram of the planar structure of an anti-fog sheet 100 according to an embodiment of this application. Figure 2 An anti-fog sheet 100 according to an embodiment of this application is along Figure 1 A schematic diagram of a partial cross-sectional view along the AA direction. Figure 3 This is a schematic diagram of the planar structure of the anti-fog sheet 100 according to another embodiment of this application. Figure 4 An anti-fog sheet 100 according to an embodiment of this application is along Figure 3Schematic diagram of the cross-sectional structure in the middle BB direction.

[0058] Please see Figures 1 to 4 This application provides an anti-fog sheet 100, which includes a main body 10 and a moisture-absorbing film 30. The moisture-absorbing film 30 is disposed on at least a portion of the surface of the main body 10 and has moisture-absorbing properties.

[0059] The anti-fog sheet 100 of this application embodiment can be applied to electronic devices with camera modules to absorb water vapor or water mist around the camera, prevent the camera from fogging when it cools down rapidly, and enable the camera to have good shooting quality and shooting effect in different application scenarios (such as after a period of use and rapid cooling).

[0060] It should be noted that the moisture-absorbing membrane 30 can be disposed on one or more surfaces of the main body 10; the moisture-absorbing membrane 30 can also be disposed on the entire surface of one surface of the main body 10, or on a portion of one surface. The moisture-absorbing membrane 30 only needs to be able to absorb water vapor or water mist to prevent the camera from fogging. The area and region covered by the moisture-absorbing membrane 30 can be designed according to actual needs, and this application does not impose specific limitations. In this application, the term "more" refers to at least two, at least two pieces, at least two layers, etc.

[0061] Optionally, the electronic device may be, but is not limited to, a camera module, camera, camcorder, mobile phone, tablet computer, laptop computer, smart bracelet, smartwatch (such as children's phone watch, adult phone phone, etc.), e-reader with camera module, game console with camera module, and other electronic devices with shooting functions.

[0062] Optionally, the anti-fog sheet 100 may include, but is not limited to, at least one of the following: a back cover of an electronic device (such as a battery protective case for an electronic device, a protective lens on a decorative component of a camera module (i.e., a protective lens on a decorative component on a back cover), and a light-diffusing sheet on the lens barrel of a camera module). Optionally, the body 10 may be, but is not limited to, at least one of the following: the body of a back cover, the substrate of a protective lens on a decorative component of a camera module, and the substrate of a light-diffusing sheet on a lens barrel.

[0063] It should be noted that the hygroscopicity of this application refers to the characteristic that the hygroscopic membrane 30 can absorb water vapor and water vapor (i.e., water vapor) in the air. In addition, the hygroscopic membrane 30 can also absorb small water droplets and fog droplets in the air or condensed on the anti-fog sheet.

[0064] It should be noted that when the anti-fog film 100 is applied to an electronic device, the moisture-absorbing film 30 is positioned facing the inside of the electronic device to absorb moisture or water vapor inside the electronic device, thereby preventing fogging on the camera of the electronic device when the temperature drops sharply.

[0065] It should be noted that when the anti-fog sheet 100 is applied to an electronic device, the moisture-absorbing film 30 of the anti-fog sheet 100 is at least connected to the cavity inside the electronic device used to house the camera module.

[0066] This application provides an anti-fog sheet 100 comprising a main body 10 and a moisture-absorbing film 30. The moisture-absorbing film 30 is disposed on at least a portion of the surface of the main body 10 and is used to absorb water vapor. When the anti-fog sheet 100 is applied to an electronic device, the moisture-absorbing film 30 can absorb residual water vapor inside the electronic device, thereby keeping the internal environment of the electronic device relatively dry. When the temperature of the electronic device rises, due to the adsorption effect of the moisture-absorbing film 30, water vapor is difficult to escape from the moisture-absorbing film 30. When the temperature of the electronic device drops sharply, due to the very low internal humidity and extremely low water vapor content, it is difficult for water vapor to condense and form small droplets on the light transmission path of the camera module of the electronic device. Therefore, when the anti-fog sheet 100 is applied to an electronic device, it can play a good anti-fogging role for the camera module of the electronic device, making the camera module of the electronic device less prone to fogging in various temperature scenarios, resulting in better shooting effects and improved user experience.

[0067] Optionally, the material of the main body 10 may be, but is not limited to, at least one of glass, microcrystalline glass, ceramic, polycarbonate (PC), polymethyl methacrylate (PMMA), and polyethylene terephthalate (PET). It is understood that the main body 10 may be, but is not limited to, at least one of glass plate, microcrystalline glass plate, ceramic plate, polycarbonate plate, polymethyl methacrylate plate, and polyethylene terephthalate plate.

[0068] Figure 5 This is a schematic diagram of the structure of a microcapsule 31 according to an embodiment of this application.

[0069] Please see Figure 5 In some embodiments, the moisture-absorbing membrane 30 includes microcapsules 31, each microcapsule 31 including a moisture-absorbing core 311 and a capsule wall 312. The surface of the moisture-absorbing core 311 has a plurality of capillaries 3111 and the moisture-absorbing core 311 is hygroscopic. The capsule wall 312 wraps around the surface of the moisture-absorbing core 311 and is breathable, such as allowing water vapor or moisture to pass through.

[0070] Understandably, the moisture-absorbing core 311 is a porous moisture-absorbing core 311.

[0071] Understandably, the microcapsule 31 has a core-shell structure.

[0072] Optionally, multiple capillaries 3111 on the surface of the same moisture-absorbing core 311 are at least partially interconnected, forming a sponge-like structure.

[0073] In this embodiment, the microcapsule 31 includes a moisture-absorbing core 311 and a capsule wall 312. The surface of the moisture-absorbing core 311 has multiple capillaries 3111 for absorbing water vapor or water mist. The capsule wall 312 wraps around the surface of the moisture-absorbing core 311 and is permeable to water vapor or water mist. The moisture-absorbing core 311 can use the capillary force of the capillaries 3111 to adsorb water droplets and water vapor or water mist only onto the moisture-absorbing core 3111. Therefore, when the anti-fog sheet 100 is applied to electronic devices, it can effectively dry the internal air of the electronic devices. When the temperature of the electronic device rises and then drops rapidly, it can prevent water droplets from condensing on the camera, thereby preventing the camera from fogging and improving the shooting quality of the electronic device. Furthermore, the capsule wall 312 does not obstruct the entry of moisture into the hygroscopic core 311, thus not hindering the absorption of moisture by the hygroscopic core 311. Additionally, the capsule wall 312 makes the entry and release of moisture relatively difficult. However, after the electronic device is assembled, there is a relatively long period for moisture to enter the microcapsule 31, thereby drying the internal air of the electronic device. When the temperature of the electronic device rises, the duration is usually short, and the moisture is difficult to release quickly, thus maintaining a dry gas environment inside the electronic device. Through the cooperation of the hygroscopic core 311 and the capsule wall 312, when the anti-fog sheet 100 is applied to the electronic device, it can better absorb moisture and dry the internal environment. At the same time, the capsule wall 312 can better prevent the release of moisture when the temperature of the electronic device rises, thus providing a better anti-fogging effect for the camera of the electronic device.

[0074] Optionally, the moisture-absorbing core 311 can be made of, but is not limited to, silicone; in other words, the moisture-absorbing core 311 is a porous silicone core. The surface of silicone contains a large number of hydrogen bonds, giving it the properties of absorbing and storing water (i.e., locking in water). The hydrogen bonds on the surface of silicone have strong van der Waals forces with the hydrogen bonds of water vapor, thus enabling the moisture-absorbing core 311 to effectively adsorb water droplets and water vapor, and preventing water vapor from easily overflowing or dissipating.

[0075] Optionally, the material of the capsule wall 312 can be, but is not limited to, melamine. Using melamine as the capsule wall 312 of the microcapsule 31 allows the capsule wall 312 to be breathable, thus not hindering the absorption of moisture by the moisture-absorbing core 311. Furthermore, although melamine is breathable, its breathability is relatively weak, making the entry and release of moisture relatively difficult. However, after the electronic device is assembled, there is a relatively long period of time for moisture to enter the microcapsule 31, thereby drying the internal air of the electronic device. When the temperature of the electronic device rises, the duration is usually short, and the moisture is difficult to release quickly, thus achieving the purpose of water retention and maintaining a dry gas environment inside the electronic device.

[0076] In some embodiments, the specific surface area of ​​the moisture-absorbing core 311 ranges from 200 m² / g to 800 m² / g.

[0077] In the embodiments of this application, when the numerical range a to b is involved, unless otherwise specified, the numerical value can be any value between a and b, including the endpoint value a and the endpoint value b.

[0078] Specifically, the specific surface area of ​​the moisture-absorbing core 311 is 200㎡ / g, 250㎡ / g, 300㎡ / g, 350㎡ / g, 400㎡ / g, 450㎡ / g, 500㎡ / g, 550㎡ / g, 600㎡ / g, 650㎡ / g, 700㎡ / g, 750㎡ / g, 800㎡ / g, etc.

[0079] In this embodiment, if the specific surface area of ​​the moisture-absorbing core 311 is too small, the moisture absorption efficiency of the moisture-absorbing core 311 will be too low, reducing the anti-fogging effect of the anti-fogging sheet 100; if the specific surface area of ​​the moisture-absorbing core 311 is larger, the moisture absorption effect of the moisture-absorbing core 311 will be better, but this will increase the difficulty of preparing the moisture-absorbing core 311 and the cost of the solution.

[0080] In some embodiments, the D50 particle size of the microcapsule 31 ranges from 1 μm to 8 μm. Here, D50 is the particle size corresponding to a cumulative particle size distribution volume percentage of 50% for the microcapsule 31.

[0081] Specifically, the D50 particle size of microcapsules 31 can be, but is not limited to, 1μm, 1.5μm, 2μm, 2.5μm, 3μm, 3.5μm, 4μm, 4.5μm, 5μm, 5.5μm, 6μm, 6.5μm, 7μm, 7.5μm, and 8μm. If the D50 particle size of microcapsules 31 is too small, the size of the moisture-absorbing core 311 of microcapsules 31 will be too small, and the proportion of capillaries 3111 will be too small, reducing the moisture absorption effect of microcapsules 31. If the D50 particle size of microcapsules 31 is too large, when microcapsules 31 are applied to inks, the dispersion effect of microcapsules 31 in inks will be poor, the thickness of the moisture-absorbing ink layer will be thick, and the surface of the moisture-absorbing ink layer will easily have unevenness.

[0082] Optionally, the D90 particle size of the microcapsule 31 is in the range of 5μm≤D90≤20μm. Wherein, D90 is the particle size corresponding to when the cumulative particle size distribution volume percentage of the microcapsule 31 reaches 90%.

[0083] Specifically, the D90 particle size of the microcapsule 31 can be, but is not limited to, 5μm, 6μm, 7μm, 8μm, 9μm, 10μm, 11μm, 12μm, 13μm, 14μm, 15μm, 16μm, 17μm, 18μm, 19μm, 20μm, etc. If the D90 particle size of the microcapsule 31 is too small, the size of the moisture-absorbing core 311 of the microcapsule 31 will be too small, and the proportion of capillaries 3111 will be too small, reducing the moisture absorption effect of the microcapsule 31. If the D90 particle size of the microcapsule 31 is too large, when the microcapsule 31 is applied to ink, the dispersion effect of the microcapsule 31 in the ink will be poor, the thickness of the moisture-absorbing ink layer will be thick, and the surface of the moisture-absorbing ink layer will easily have bumps.

[0084] In some embodiments, the thickness of the capsule wall 312 ranges from 50 nm to 250 nm.

[0085] Specifically, the thickness of the capsule wall 312 can be, but is not limited to, 50nm, 80nm, 100nm, 120nm, 140nm, 160nm, 180nm, 200nm, 220nm, 240nm, 250nm, etc.

[0086] In this embodiment, if the thickness of the capsule wall 312 is too thin, the microcapsule 31 will easily rupture, making it difficult for the microcapsule 31 to lock in moisture, and water vapor or water mist will easily escape, reducing the moisture absorption effect of the microcapsule 31 and thus reducing the anti-fogging performance of the anti-fogging sheet 100. If the thickness of the capsule wall 312 is too thick, water vapor or water mist will have difficulty passing through the capsule wall 312 and entering the moisture-absorbing core 311, which will also reduce the moisture absorption effect of the microcapsule 31 and reduce the anti-fogging performance of the anti-fogging sheet 100.

[0087] In some embodiments, the water vapor permeability of the capsule wall 312 ranges from 5 g / m² / day to 20 g / m² / day.

[0088] Specifically, the water vapor permeability of the bladder wall 312 can be, but is not limited to, 5 g / m² / day, 6 g / m² / day, 7 g / m² / day, 8 g / m² / day, 9 g / m² / day, 10 g / m² / day, 11 g / m² / day, 12 g / m² / day, 13 g / m² / day, 14 g / m² / day, 15 g / m² / day, 16 g / m² / day, 17 g / m² / day, 18 g / m² / day, 19 g / m² / day, 20 g / m² / day, etc.

[0089] In this embodiment, the density of the capsule wall 312 can be adjusted to regulate the ease with which water vapor enters and exits the capsule wall 312. By appropriately increasing the density of the capsule wall 312 of the microcapsule 31, water vapor entry and release become relatively difficult. However, when the anti-fog sheet 100 is applied to electronic devices, there is a relatively long period after the electronic device is assembled, allowing water vapor to enter. Therefore, the microcapsule 31 can still absorb moisture and dry the air without affecting the anti-fog effect of the anti-fog sheet 100. However, when the temperature of the electronic device rises, the duration is usually short, making it difficult for water vapor to quickly release from the capsule wall 312. Therefore, the internal environment of the electronic device can be kept dry, thus preventing fogging of the camera and achieving an anti-fog effect.

[0090] In this embodiment, if the water vapor permeability of the capsule wall 312 is too low, the water vapor will have difficulty entering the microcapsule 31 and being absorbed by the moisture-absorbing core 311, thus reducing the moisture absorption effect of the microcapsule 31 and the anti-fogging effect of the anti-fogging sheet 100. If the water vapor permeability of the capsule wall 312 is too high, when the anti-fogging sheet 100 is applied to electronic devices and the temperature of the electronic devices rises, the locking effect of the capsule wall 312 on the water vapor inside the microcapsule 31 will be too low, making it difficult to lock in the water vapor, which will also reduce the anti-fogging effect of the anti-fogging sheet 100.

[0091] In some embodiments, the moisture absorption rate of the microcapsule 31 ranges from 10% to 40%.

[0092] Understandably, the maximum mass of the microcapsule 31 after absorbing the water vapor or water mist increases by 10% to 40% compared to its initial mass before absorbing the water vapor or water mist. It is also understood that the ratio of the maximum mass of the microcapsule 31 after absorbing the water vapor or water mist to its initial mass before absorbing the water vapor or water mist is 1.1 to 1.4. For example, if the weight of the microcapsule 31 is 1g before absorbing the water vapor or water mist, then the maximum weight of the microcapsule 31 after absorbing the water vapor or water mist (e.g., under 100% humidity conditions) ranges from 1.1g to 1.4g. It is also understood that the microcapsule 31 can absorb and condense up to 10% to 40% of its own weight in water vapor or water mist.

[0093] Specifically, the moisture absorption rate of the microcapsule 31 can be, but is not limited to, 10%, 13%, 15%, 18%, 20%, 23%, 25%, 28%, 30%, 33%, 35%, 38%, 40%, etc.

[0094] In this embodiment, if the moisture absorption rate of the microcapsule 31 is too low, the moisture absorption effect of the microcapsule 31 will be reduced, and the anti-fogging effect of the anti-fogging sheet 100 will be reduced. If the moisture absorption rate of the microcapsule 31 is higher, it means that the moisture absorption effect of the microcapsule 31 is better. However, if the moisture absorption rate of the microcapsule 31 is too high, it will increase the difficulty of preparing the microcapsule 31, and may even make it difficult to achieve.

[0095] Figure 6 This is a cross-sectional structural schematic diagram of the moisture-absorbing membrane 30 according to an embodiment of this application.

[0096] Please see Figure 6 In some embodiments, the moisture-absorbing film 30 includes a moisture-absorbing ink layer 30a, which includes microcapsules 31 and ink (not shown). The mass fraction of the microcapsules 31 in the moisture-absorbing ink layer 30a ranges from 10% to 70%.

[0097] Understandably, the microcapsules 31 are dispersed in the ink to form a moisture-absorbing ink, and the moisture-absorbing ink is cured to form a moisture-absorbing ink layer 30a.

[0098] Specifically, the mass fraction of the microcapsules 31 in the moisture-absorbing ink layer 30a can be, but is not limited to, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, etc.

[0099] In this embodiment, if the mass fraction of the microcapsules 31 in the moisture-absorbing ink layer 30a is too low, the moisture absorption of the moisture-absorbing ink layer 30a is reduced, thus reducing the anti-fogging effect of the anti-fogging sheet 100. If the mass fraction of the microcapsules 31 in the moisture-absorbing ink layer 30a is too high, the dispersibility of the microcapsules 31 in the ink is reduced, making the microcapsules 31 prone to clumping, reducing the adhesion of the moisture-absorbing ink layer 30a, thereby making the anti-fogging sheet 100 prone to delamination and reducing the service life of the anti-fogging sheet 100.

[0100] Optionally, the thickness of the moisture-absorbing ink layer 30a ranges from 15μm to 25μm. Specifically, the thickness of the moisture-absorbing ink layer 30a can be, but is not limited to, 15μm, 16μm, 17μm, 18μm, 19μm, 20μm, 21μm, 22μm, 23μm, 24μm, 25μm, etc. If the thickness of the moisture-absorbing ink layer 30a is too thin, the moisture absorption effect of the moisture-absorbing ink layer 30a is reduced, and the anti-fogging effect of the anti-fogging sheet 100 is also reduced; if the thickness of the moisture-absorbing ink layer 30a is too thick, the thickness of the anti-fogging sheet 100 is increased, and the adhesion between the moisture-absorbing ink layer 30a and the main body 10 is reduced.

[0101] Figure 7 This is a cross-sectional structural schematic diagram of an anti-fog sheet 100 according to another embodiment of this application.

[0102] Please see Figure 7 In some embodiments, the anti-fog sheet 100 further includes a shielding layer 40 disposed between the main body 10 and the moisture-absorbing ink layer 30a. In other embodiments, when the anti-fog sheet 100 is used as a matte sheet, the moisture-absorbing ink layer 30a may also be located between the main body 10 and the shielding layer 40.

[0103] Optionally, the shielding layer 40 can be, but is not limited to, a black ink layer. The shielding layer 40 absorbs light and prevents light from passing through the portion of the anti-fog sheet 100 corresponding to the shielding layer 40. When the anti-fog sheet 100 is a matte finish on a lens barrel, the shielding layer 40 also absorbs stray light, improving the shooting effect of the camera module. Furthermore, the shielding layer 40 can also serve a decorative purpose, giving the anti-fog sheet 100 a better appearance.

[0104] Understandably, the anti-fog sheet 100 includes a main body 10, a shielding layer 40, and a moisture-absorbing ink layer 30a stacked in sequence.

[0105] In some embodiments, the masking layer 40 is disposed on the surface of the body 10, and the moisture-absorbing ink layer 30a is disposed on the surface of the masking layer 40 opposite to the body 10. In other embodiments, other film layers are further disposed between the body 10 layer and the masking layer 40.

[0106] It should be noted that when the anti-fog sheet 100 serves as the back cover of the electronic device, the shielding layer 40 can cover the entire surface of the back cover of the electronic device, that is, the entire surface of the main body 10. The moisture-absorbing ink layer 30a can cover the entire surface of the main body 10 or a portion of the surface of the main body 10. When the anti-fog sheet 100 serves as a protective lens on a decorative component of a camera module or as a light-absorbing film on a lens barrel, both the shielding layer 40 and the moisture-absorbing ink layer 30a are positioned to avoid the light transmission path (e.g., light-transmitting hole) of the camera module.

[0107] Optionally, the shielding layer 40 can be, but is not limited to, at least one of polyurethane ink layer, epoxy resin ink layer, etc. Optionally, the number of shielding layers 40 can be one or more layers; when the number of shielding layers 40 is multiple, the multiple shielding layers 40 are stacked sequentially. Optionally, the total thickness of the shielding layer 40 ranges from 20μm to 40μm. Specifically, the total thickness of the shielding layer 40 can be, but is not limited to, 20μm, 22μm, 24μm, 26μm, 28μm, 30μm, 32μm, 34μm, 36μm, 38μm, 40μm, etc. If the thickness of the shielding layer 40 is too thin, the light-blocking or light-absorbing effect of the shielding layer 40 will be poor; if the thickness of the shielding layer 40 is too thick, it increases the thickness of the anti-fog sheet 100.

[0108] In some embodiments, the masking layer 40 and the moisture-absorbing ink layer 30a are formed directly on the body 10. In other embodiments, the masking layer 40 and the moisture-absorbing ink layer 30a are first formed on a substrate layer and then bonded to the body 10.

[0109] Figure 8 This is a cross-sectional structural schematic diagram of an anti-fog sheet 100 according to another embodiment of this application.

[0110] Please see Figure 8 Optionally, the anti-fog sheet 100 further includes a substrate layer 50 and a first adhesive layer 60. The substrate layer 50 is located between the main body 10 and the shielding layer 40 and is used to support the shielding layer 40 and the moisture-absorbing ink layer 30a. The first adhesive layer 60 is used to bond the substrate layer 50 to the main body 10.

[0111] Optionally, the substrate layer 50 may be, but is not limited to, at least one of polycarbonate (PC), polymethyl methacrylate (PMMA), and polyethylene terephthalate (PET). Optionally, the thickness of the substrate layer 50 may range from 30 μm to 70 μm. Specifically, the thickness of the substrate layer 50 may be, but is not limited to, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 65 μm, and 70 μm.

[0112] Optionally, the first adhesive layer 60 can be, but is not limited to, a transparent optical adhesive layer (i.e., OCA adhesive). Optionally, the thickness of the first adhesive layer 60 ranges from 20 μm to 30 μm. Specifically, the thickness of the first adhesive layer 60 can be, but is not limited to, 20 μm, 22 μm, 24 μm, 26 μm, 28 μm, 30 μm, etc. If the thickness of the first adhesive layer 60 is too thin, the adhesion effect between the main body 10 of the first adhesive layer 60 and the substrate layer 50 is reduced; if the thickness of the first adhesive layer 60 is too thick, the thickness and cost of the anti-fog sheet 100 are increased.

[0113] Figure 9 This is a cross-sectional structural schematic diagram of an anti-fog sheet 100 according to another embodiment of this application.

[0114] Please see Figure 9 In some embodiments, the anti-fog sheet 100 further includes at least one of a first texture layer 70 and a first coating layer 80. The first texture layer 70 is used to give the anti-fog sheet 100 a textured effect, and the first coating layer 80 is used to give the anti-fog sheet 100 a metallic luster or iridescent effect.

[0115] Optionally, when the anti-fog film 100 is applied to an electronic device, both the first texture layer 70 and the first coating layer 80 are positioned to avoid the light transmission path (e.g., light transmission hole) of the camera module.

[0116] In one example, the anti-fog sheet 100 also includes a first texture layer 70, which is located between the substrate layer 50 and the masking layer 40. That is, the anti-fog sheet 100 includes a main body 10, a first adhesive layer 60, a substrate layer 50, a first texture layer 70, a masking layer 40 and a moisture-absorbing ink layer 30a stacked together.

[0117] In another example, the anti-fog sheet 100 also includes a first coating layer 80 located between the substrate layer 50 and the shielding layer 40. That is, the anti-fog sheet 100 includes a main body 10, a first adhesive layer 60, a substrate layer 50, a first coating layer 80, a shielding layer 40, and a moisture-absorbing ink layer 30a stacked together.

[0118] In another example, the anti-fog sheet 100 further includes a first texture layer 70 and a first coating layer 80, wherein the first texture layer 70 is located between the substrate layer 50 and the masking layer 40, and the first coating layer 80 is located between the first texture layer 70 and the masking layer 40. That is, the anti-fog sheet 100 includes a main body 10, a first adhesive layer 60, a substrate layer 50, a first texture layer 70, a first coating layer 80, a masking layer 40, and a moisture-absorbing ink layer 30a stacked together. Optionally, the method for preparing the anti-fog film 100 in this embodiment includes: 1) transferring a first textured layer 70 onto a substrate layer 50; 2) depositing a first coating layer 80 onto the first textured layer 70; 3) screen printing a black ink layer onto the first coating layer 80 and curing it to form a masking layer 40; 4) screen printing a moisture-absorbing ink layer 30a onto the masking layer 40; and 5) using optical adhesive to bond the substrate layer 50 having the first textured layer 70, the first coating layer 80, the masking layer 40 and the moisture-absorbing ink layer 30a to the main body 10, such that the substrate layer 50 faces the main body 10.

[0119] Optionally, the first texture layer 70 may be, but is not limited to, a UV-cured first texture layer 70 (i.e., a UV first texture layer 70), wherein the surface of the first texture layer 70 facing away from the substrate layer 50 has a textured structure to give the first texture layer 70 a textured effect. Optionally, the thickness of the first texture layer 70 ranges from 7 μm to 13 μm. Specifically, the thickness of the first texture layer 70 may be, but is not limited to, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, etc.

[0120] Optionally, the first coating layer 80 can be, but is not limited to, at least one of optical coating layers and vacuum coating layers. The first coating layer 80 can be one or more layers; when the first coating layer 80 is multi-layered, the multiple first coating layers 80 are stacked sequentially. Optionally, the total thickness of the first coating layer 80 ranges from 50 nm to 800 nm; specifically, the total thickness of the first coating layer 80 can be, but is not limited to, 50 nm, 100 nm, 200 nm, 300 nm, 400 nm, 500 nm, 600 nm, 800 nm, etc. Optionally, the first coating layer 80 can include one or more of TiO2, Ti3O5, NbO2, Nb2O3, Nb2O2, Nb2O5, SiO2, and ZrO2. Optionally, the first coating layer 80 may be formed by one or more of the following techniques: non-conductive vacuum metalization (NCVM), evaporation coating process, sputtering coating process, atomic layer deposition (ALD) technology, physical vapor deposition (PVD).

[0121] Figure 10 This is a cross-sectional structural schematic diagram of the moisture-absorbing membrane 30 according to another embodiment of this application. Figure 11This is a cross-sectional structural schematic diagram of an anti-fog sheet 100 according to another embodiment of this application.

[0122] Please see Figure 10 and Figure 11 In other embodiments, the moisture-absorbing membrane 30 includes a base layer 32, an adhesive 33, a breathable layer 34, and microcapsules 31. The breathable layer 34 is spaced apart on the side of the base layer 32 away from the main body 10. The adhesive 33 is disposed between the base layer 32 and the breathable layer 34 and surrounds the outer periphery of the base layer 32 and the breathable layer 34, respectively. The base layer 32, the adhesive 33, and the breathable layer 34 define a receiving cavity, and the microcapsules 31 are disposed within the receiving cavity.

[0123] Understandably, the moisture-absorbing membrane 30 includes a base layer 32, a microcapsule layer 31, and a breathable layer 34 stacked sequentially, with an adhesive 33 surrounding the outer periphery of the microcapsules 31. It is also understood that the microcapsules 31 are confined within a cavity enclosed by the base layer 32, the adhesive 33, and the breathable layer 34.

[0124] Understandably, the base layer 32 is positioned closer to the main body 10 than the breathable layer 34; in other words, the breathable layer 34 is positioned away from the main body 10. When the anti-fog sheet 100 is applied to an electronic device, the breathable layer 34 faces the interior of the electronic device.

[0125] In this embodiment, the moisture-absorbing membrane 30 includes a base layer 32, an adhesive 33, a breathable layer 34, and microcapsules 31. The breathable layer 34 is spaced apart on the side of the base layer 32 away from the main body 10. The adhesive 33 is disposed between the base layer 32 and the breathable layer 34 and surrounds the outer periphery of the base layer 32 and the breathable layer 34 respectively. The base layer 32, the adhesive 33, and the breathable layer 34 define a receiving cavity, and the microcapsules 31 are disposed in the receiving cavity. When the anti-fog sheet 100 is applied to electronic devices, residual moisture inside the electronic device can pass through the breathable layer 34 and enter the microcapsules 31 within the accommodating cavity, where it is absorbed. This keeps the internal environment of the electronic device relatively dry. When the temperature of the electronic device rises, the moisture-absorbing membrane 30 is unable to overflow due to its adsorption effect. When the temperature of the electronic device drops sharply, the low internal humidity and minimal moisture content make it difficult for small droplets to condense on the light transmission path of the camera module. As a result, when the anti-fog sheet 100 is applied to electronic devices, it provides excellent anti-fogging protection for the camera module, making it less prone to fogging in various temperature conditions, resulting in better shooting performance and improved user experience.

[0126] Optionally, the substrate layer 32 may be, but is not limited to, at least one of polycarbonate (PC), polymethyl methacrylate (PMMA), and polyethylene terephthalate (PET). Optionally, the thickness of the substrate layer 32 may range from 30 μm to 70 μm. Specifically, the thickness of the substrate layer 32 may be, but is not limited to, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 65 μm, and 70 μm.

[0127] Optionally, the base layer 32 can be, but is not limited to, a black base layer 32. In other words, the base layer 32 not only supports the adhesive component 33, the microcapsule 31, and the breathable layer 34, but also serves to shield or matte the light. It can also be understood that in this embodiment, the base layer 32 also functions as a shielding layer 40, therefore, the shielding layer 40 can be omitted.

[0128] Optionally, the adhesive component 33 may be, but is not limited to, a glue frame, and the adhesive component 33 is used to bond the breathable layer 34 to the base layer 32.

[0129] Optionally, the thickness of the adhesive component 33 ranges from 25 μm to 35 μm. It is understood that the height of the accommodating cavity in the moisture-absorbing membrane 30, along the lamination direction of the base layer 32 and the waterproof and breathable membrane, ranges from 25 μm to 35 μm. It is also understood that the thickness of the microcapsule 31 in the moisture-absorbing membrane 30, along the lamination direction of the base layer 32 and the waterproof and breathable membrane, ranges from 25 μm to 35 μm. Specifically, the thickness of the adhesive component 33 can be, but is not limited to, 25 μm, 26 μm, 27 μm, 28 μm, 29 μm, 30 μm, 31 μm, 32 μm, 33 μm, 34 μm, 35 μm, etc. The thickness of the adhesive component 33 is too thin, which increases the difficulty of preparation and reduces the bonding force between the breathable layer 34 and the base layer 32. In addition, the thickness of the moisture-absorbing ink layer 30a is too thin, resulting in a smaller amount of microcapsules 31, which reduces the moisture absorption effect of the moisture-absorbing film 30 and the anti-fog effect of the anti-fog sheet 100. The thickness of the adhesive component 33 is too thick, which increases the thickness of the anti-fog sheet 100 and is not conducive to making the anti-fog sheet 100 thinner.

[0130] Optionally, the breathable layer 34 is waterproof, i.e., the breathable layer 34 is a waterproof and breathable layer 34. Optionally, the thickness of the breathable layer 34 ranges from 40μm to 60μm. Specifically, the thickness of the breathable layer 34 can be, but is not limited to, 40μm, 43μm, 45μm, 48μm, 50μm, 53μm, 55μm, 58μm, 60μm, etc. If the thickness of the breathable layer 34 is too thin, the strength of the breathable layer 34 is insufficient, and it is easy to break, thereby exposing or scattering the microcapsules 31; if the thickness of the breathable layer 34 is too thick, it reduces the breathability of the breathable layer 34 and increases the thickness of the anti-fog sheet 100, which is not conducive to the thinning of the anti-fog sheet 100.

[0131] Optionally, the breathable layer 34 may be made of, but is not limited to, a polymeric microporous waterproof material such as expanded polytetrafluoroethylene (e-PTFE). Expanded polytetrafluoroethylene allows water vapor and air to pass through, thereby allowing water vapor to be absorbed by the microcapsules 31, which helps to dry the air inside the electronic device and prevents the lens on the camera of the electronic device from fogging up.

[0132] Figure 12 This is a cross-sectional structural schematic diagram of an anti-fog sheet 100 according to another embodiment of this application.

[0133] Please see Figure 12 Optionally, the anti-fog sheet 100 further includes a second adhesive layer 60a, which is disposed between the main body 10 and the base layer 32 for bonding the main body 10 and the base layer 32.

[0134] Optionally, the second adhesive layer 60a can be, but is not limited to, a transparent optical adhesive layer (i.e., OCA adhesive). Optionally, the thickness of the second adhesive layer 60a ranges from 20 μm to 30 μm. Specifically, the thickness of the second adhesive layer 60a can be, but is not limited to, 20 μm, 22 μm, 24 μm, 26 μm, 28 μm, 30 μm, etc. If the thickness of the second adhesive layer 60a is too thin, the adhesion effect between the main body 10 of the second adhesive layer 60a and the substrate layer 50 is reduced; if the thickness of the second adhesive layer 60a is too thick, the thickness and cost of the anti-fog sheet 100 are increased.

[0135] Figure 13 This is a cross-sectional structural schematic diagram of an anti-fog sheet 100 according to another embodiment of this application.

[0136] Please see Figure 13 Optionally, the anti-fog film 100 further includes at least one of a second texture layer 70a and a second coating layer 80a. The second texture layer 70a is used to give the anti-fog film 100 a textured effect, and the second coating layer 80a is used to give the anti-fog film 100 a metallic luster or iridescent effect.

[0137] Optionally, when the anti-fog film 100 is applied to an electronic device, both the second texture layer 70a and the second coating layer 80a are positioned to avoid the light transmission path (e.g., light transmission hole) of the camera module.

[0138] In one example, the anti-fog sheet 100 also includes a second textured layer 70a, which is located between the base layer 32 and the main body 10. That is, the anti-fog sheet 100 includes the main body 10, the second adhesive layer 60a, the second textured layer 70a and the moisture-absorbing film 30 stacked together. The moisture-absorbing film 30 includes the base layer 32, the adhesive 33, the breathable layer 34 and the microcapsules 31.

[0139] In another example, the anti-fog sheet 100 also includes a second coating layer 80a, which is located between the base layer 32 and the main body 10. That is, the anti-fog sheet 100 includes the main body 10, the second adhesive layer 60a, the second coating layer 80a and the moisture-absorbing film 30 stacked together. The moisture-absorbing film 30 includes the base layer 32, the adhesive layer 33, the breathable layer 34 and the microcapsules 31.

[0140] In another example, the anti-fog sheet 100 further includes a second textured layer 70a and a second coating layer 80a. The second textured layer 70a is located between the base layer 32 and the main body 10, and the second coating layer 80a is located between the second textured layer 70a and the main body 10. Optionally, the anti-fog sheet 100 includes a main body 10, a second adhesive layer 60a, a second coating layer 80a, a second textured layer 70a, and a moisture-absorbing film 30 stacked together. The moisture-absorbing film 30 includes a base layer 32, an adhesive layer 33, a breathable layer 34, and microcapsules 31. Optionally, the method for preparing the anti-fog sheet 100 in this embodiment includes: 1) transferring a second textured layer 70a onto a black base layer 32; 2) depositing a second coating layer 80a onto the second textured layer 70a; 3) using optical adhesive to bond the base layer 32 having the second textured layer 70a and the second coating layer 80a to the main body 10, such that the second coating layer 80a faces the main body 10; 4) providing an adhesive component 33 (adhesive frame) on the surface of the base layer 32 facing away from the second textured layer 70a, and placing a breathable layer 34 on the adhesive frame, so that a receiving cavity is formed between the base layer 32, the adhesive frame and the breathable layer 34, and filling the receiving cavity with microcapsules 31.

[0141] Optionally, the second texture layer 70a may be, but is not limited to, a UV-cured second texture layer 70a (i.e., a UV second texture layer 70a), wherein the surface of the second texture layer 70a facing away from the substrate layer 32 has a textured structure to give the second texture layer 70a a textured effect. Optionally, the thickness of the second texture layer 70a ranges from 7 μm to 13 μm. Specifically, the thickness of the second texture layer 70a may be, but is not limited to, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, etc.

[0142] Optionally, the second coating layer 80a can be, but is not limited to, at least one of an optical coating layer and a vacuum coating layer. The second coating layer 80a can be one or more layers; when the second coating layer 80a is multi-layered, the multiple layers of the second coating layer 80a are stacked sequentially. Optionally, the total thickness of the second coating layer 80a ranges from 50 nm to 800 nm; specifically, the total thickness of the second coating layer 80a can be, but is not limited to, 50 nm, 100 nm, 200 nm, 300 nm, 400 nm, 500 nm, 600 nm, 800 nm, etc. Optionally, the second coating layer 80a can include one or more of TiO2, Ti3O5, NbO2, Nb2O3, Nb2O2, Nb2O5, SiO2, and ZrO2. Optionally, the second coating layer 80a may be formed using one or more of the following techniques: non-conductive vacuum metalization (NCVM), evaporation coating, sputtering coating, and atomic layer deposition (ALD).

[0143] Figure 14 This is a schematic diagram of the structure of a back cover assembly 230 according to an embodiment of this application.

[0144] Please see Figure 14 This application embodiment also provides a back cover assembly 230, the back cover assembly 230 includes a protective lens 231 and a back cover 232, the back cover 232 is disposed around the outer periphery of the protective lens 231, and the anti-fog sheet 100 described in this application embodiment is in the protective lens 231 and the back cover 232.

[0145] Understandably, the back cover assembly 230 may only protect the lens 231 using the anti-fog film 100 of the present application embodiment; the back cover assembly 230 may also only protect the back cover 232 using the anti-fog film 100 of the present application embodiment; or the back cover assembly 230 may only protect both the lens 231 and the back cover 232 using the anti-fog film 100 of the present application embodiment.

[0146] Optionally, the protective lens 231 can be separated from the back cover 232; the protective lens 231 can also be connected to the back cover 232. Specifically, the protective lens 231 can be connected to the back cover 232 by an adhesive, and other components can be provided between the protective lens 231 and the back cover 232 in addition to the adhesive.

[0147] The back cover assembly 230 of this application embodiment can be used as a battery cover for an electronic device. When in use, the protective lens 231 is set to correspond to the rear camera module of the electronic device, the back cover 232 is set to correspond to the battery area, and the moisture-absorbing film avoids the light-transmitting hole of the camera module.

[0148] Optionally, the protective lens 231 has a first light-transmitting portion 2311, which corresponds to the light-transmitting hole of the camera module. The orthographic projection of the light-transmitting hole onto the first light-transmitting portion 2311 at least partially overlaps with the first light-transmitting portion 2311. The camera module takes pictures through the first light-transmitting portion 2311 of the back cover assembly 230. In the schematic diagram of this embodiment, the first light-transmitting portion 2311 can be made of a light-transmitting material, such as plastic or glass.

[0149] Figure 15 This is a schematic diagram of the structure of an electronic device 200 according to an embodiment of this application. Figure 16 This is a partial exploded structural diagram of an electronic device 200 according to an embodiment of this application. Figure 17 This is a top view of a camera module 220 according to an embodiment of this application. Figure 18 This is a circuit block diagram of an electronic device 200 according to an embodiment of this application.

[0150] Please see Figures 15 to 18 This application also provides an electronic device 200, which includes a display screen 210, a camera module 220, a back cover assembly 230 according to this application, and a main processor 240. The camera module 220 has a light-transmitting hole 221; the protective lens 231 of the back cover assembly 230 is disposed corresponding to the camera module 220; the moisture-absorbing film 30 of the anti-fog film 100 is located between the main body and the display screen 210, and the moisture-absorbing film 30 is disposed away from the light-transmitting hole 221; the main processor 240 is electrically connected to the camera module 220 and the display screen 210 respectively, and is used to control the camera module 220 to take pictures and control the display screen 210 to display.

[0151] The electronic device 200 in this application embodiment can be, but is not limited to, a mobile phone, tablet computer, laptop computer, desktop computer, smart bracelet, smartwatch, e-reader, game console, or other portable electronic device 200.

[0152] It should be noted that when the anti-fog sheet 100 includes at least one of the following: a shielding layer 40, a first textured layer 70, a first coating layer 80, a second textured layer 70a, and a second coating layer 80a, the shielding layer 40, the first textured layer 70, the first coating layer 80, the second textured layer 70a, and the second coating layer 80a are all disposed away from the light-transmitting hole 221.

[0153] Understandably, the display surface of the display screen 210 is positioned away from the back cover assembly 230, the moisture-absorbing film 30 is positioned closer to the display screen 210 than the main body 10, and the main body 10 is positioned further away from the display screen 210 than the moisture-absorbing film 30.

[0154] In some embodiments, the protective lens 231 is the anti-fog film 100. In other embodiments, the back cover 232 is the anti-fog film 100. In still other embodiments, both the protective lens 231 and the back cover 232 are the anti-fog film 100.

[0155] Optionally, the main processor 240 is electrically connected to the image processor of the camera module 220.

[0156] Optionally, the display screen 210 may be, but is not limited to, one or more of the following: liquid crystal display screen, light-emitting diode display screen (LED display screen), micro light-emitting diode display screen (Micro LED display screen), mini light-emitting diode display screen (Mini LED display screen), organic light-emitting diode display screen (OLED display screen).

[0157] Optionally, the main processor 240 includes one or more general-purpose processors, wherein the general-purpose processors can be any type of device capable of processing electronic instructions, including a central processing unit (CPU), microprocessor, microcontroller, controller, ASIC, system-on-a-chip, etc. The main processor 240 is used to execute various types of digital storage instructions, such as software or firmware programs stored in memory, which enables the computing device to provide a wide range of services.

[0158] Optionally, the electronic device 200 of this application further includes a memory 250. The memory 250 is electrically connected to the main processor 240 and is used to store the program code required for the main processor 240 to run, the program code required to control the display screen 210, the display content of the display screen 210, etc.

[0159] Optionally, memory 250 may include volatile memory, such as random access memory (RAM); memory 250 may also include non-volatile memory (NVM), such as read-only memory (ROM), flash memory (FM), hard disk drive (HDD), or solid-state drive (SSD). Memory 250 may also include combinations of the above types of memory.

[0160] In some embodiments, the electronic device 200 of this application further includes a mid-frame 260, which is disposed between the display screen 210 and the rear cover assembly 230, and the side of the mid-frame 260 is exposed between the rear cover assembly 230 and the display screen 210. The mid-frame 260 and the rear cover assembly 230 enclose an accommodating space (not shown), which is used to accommodate the main processor 240, the memory 250, and the camera module 220, etc.

[0161] It is understood that the electronic device 200 described in this embodiment is merely one form of the electronic device 200 used in the anti-fog sheet 100, and should not be construed as a limitation on the electronic device 200 provided in this application, nor should it be construed as a limitation on the anti-fog sheet 100 provided in various embodiments of this application.

[0162] Figure 19 This is a schematic diagram of the structure of a camera module 220 according to an embodiment of this application.

[0163] Please see Figure 19 This application embodiment also provides a camera module 220, which includes a lens barrel 222, a lens group 223, and a light-absorbing sheet 224. The lens group 223 is housed in and supported by the lens barrel 222, and is used to collect and focus light. The light-absorbing sheet 224 is supported by the lens barrel 222 and disposed on the object side of the lens group 223. The light-absorbing sheet 224 is the anti-fog sheet 100 described in this application embodiment. The anti-fog sheet 100 has a light-absorbing area 101 and a light-transmitting area 102. The light-absorbing area 101 is disposed around the outer periphery of the light-transmitting area 102. The moisture-absorbing film 30 is disposed in the light-absorbing area 101 and avoids the light-transmitting area 102.

[0164] For a detailed description of other aspects of the anti-fog sheet 100, please refer to the description of the corresponding part of the above embodiments, which will not be repeated here.

[0165] It should be noted that the matting area 101 of the matting sheet 224 is used to absorb stray light in order to improve the shooting effect of the camera.

[0166] It should be noted that, compared to the solution where the anti-fog sheet 100 is used to protect the lens 231 and the back cover 232, in this embodiment, the anti-fog sheet 100 is used as a matte film 224. The anti-fog sheet 100 is closest to the camera (the camera includes the lens barrel 222, the lens group 223 and the matte film 224), and can absorb moisture near the camera most quickly, thereby better preventing the camera from fogging and achieving a better anti-fog effect.

[0167] Optionally, the main body 10 is located between the moisture-absorbing film 30 and the lens group 223. Understandably, the main body 10 is positioned closer to the lens group 223 than the moisture-absorbing film 30, and the moisture-absorbing film 30 is positioned further away from the lens group 223 than the main body 10.

[0168] Understandably, when light enters the camera module 220, it first passes through the light-transmitting area 102 of the anti-fog sheet 100 (i.e., the matte sheet 224), then through the lens group 223, and finally forms an image on the image sensor of the camera module 220. It should be noted that, in this embodiment, the light-transmitting area 102 of the anti-fog sheet 100 forms the light-transmitting hole 221 of the camera module 220.

[0169] Optionally, the lens group 223 may include one or more lenses.

[0170] Optionally, the camera module 220 further includes an image sensor (also known as a photosensitive element, not shown) and an image processor (not shown). The image sensor is disposed on the image side of the lens group 223 (for example, on the side of the lens group 223 opposite to the light-absorbing sheet 224). The image sensor is used to convert the light signal passing through the lens group 223 into an electrical signal and generate image data. The image processor is electrically connected to the image sensor and is used to process the raw data output by the image sensor, including image processing such as noise reduction, color correction, automatic exposure, and automatic white balance.

[0171] Please see again Figure 15 and Figure 18 This application also provides an electronic device 200, which includes a display screen 210, a camera module 220 as described in this application embodiment, and a main processor 240. The main processor 240 is electrically connected to the camera module 220 and the display screen 210, and is used to control the camera module 220 to take pictures and control the display screen 210 to display.

[0172] Optionally, the main processor 240 is electrically connected to the image processor of the camera module 220.

[0173] The electronic device 200 in this application embodiment can be, but is not limited to, a mobile phone, tablet computer, laptop computer, desktop computer, smart bracelet, smartwatch, e-reader, game console, or other portable electronic device 200.

[0174] For a detailed description of other aspects of the camera module 220, please refer to the description of the corresponding part of the above embodiments, which will not be repeated here.

[0175] For a detailed description of the display screen 210, main processor 240, and other aspects, please refer to the description of the corresponding parts of the above embodiments, which will not be repeated here.

[0176] Optionally, the electronic device 200 of this application further includes a memory 250. The memory 250 is electrically connected to the main processor 240 and is used to store program code required for the main processor 240 to run, program code required to control the display screen 210, and the display content of the display screen 210, etc. For a detailed description of the memory and other aspects, please refer to the description of the corresponding part of the above embodiments, which will not be repeated here.

[0177] Figure 20 This is a partial exploded structural diagram of an electronic device 200 according to another embodiment of this application.

[0178] Please see Figure 20 In some embodiments, the electronic device 200 of this application further includes a mid-frame 260 and a housing 270. The mid-frame 260 is disposed between the display screen 210 and the housing 270, and the side of the mid-frame 260 is exposed between the housing 270 and the display screen 210. The mid-frame 260 and the housing 270 form an accommodating space (not shown), which is used to accommodate the main processor 240, the memory 250, and the camera module 220.

[0179] It should be noted that in this embodiment, the moisture-absorbing film 30 is located between the main body 10 and the shell 270.

[0180] Optionally, the housing 270 has a second light-transmitting portion 271, through which the camera module 220 can capture images. That is, in this embodiment, the camera module 220 is a rear-facing camera module. The second light-transmitting portion 271 is provided corresponding to the light-transmitting hole 221 (i.e., the light-transmitting area 102) of the camera module 220, and the orthographic projection of the light-transmitting hole 221 onto the second light-transmitting portion 271 at least partially overlaps with the second light-transmitting portion 271. In the schematic diagram of this embodiment, the second light-transmitting portion 271 is shown as an opening. In other embodiments, the second light-transmitting portion 271 may not be an opening, but rather a light-transmitting material, such as plastic or glass.

[0181] It is understood that the electronic device 200 described in this embodiment is merely one form of the electronic device 200 used in the camera module 220, and should not be construed as a limitation on the electronic device 200 provided in this application, nor should it be construed as a limitation on the camera module 220 provided in various embodiments of this application.

[0182] In this application, the terms "embodiment" and "implementation" mean that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of these phrases in various locations throughout the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art will understand, explicitly and implicitly, that the embodiments described in this application can be combined with other embodiments. Furthermore, it should be understood that the features, structures, or characteristics described in the various embodiments of this application can be arbitrarily combined to form yet another embodiment that does not depart from the spirit and scope of the technical solution of this application, provided there is no contradiction between them.

[0183] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. An anti-fog sheet, characterized in that, The anti-fog sheet includes: The main body; and A moisture-absorbing membrane is disposed on at least a portion of the surface of the body, and the moisture-absorbing membrane has hygroscopic properties.

2. The anti-fog sheet according to claim 1, characterized in that, The moisture-absorbing membrane includes microcapsules, the microcapsules comprising: A moisture-absorbing core, the surface of which has multiple capillaries, and the moisture-absorbing core is hygroscopic; and The capsule wall, which wraps around the surface of the moisture-absorbing core, is breathable.

3. The anti-fog sheet according to claim 2, characterized in that, The specific surface area of ​​the hygroscopic core ranges from 200 m² / g to 800 m² / g.

4. The anti-fog sheet according to claim 2, characterized in that, The D50 particle size of the microcapsules is in the range of 1μm≤D50≤8μm; the D90 particle size of the microcapsules is in the range of 5μm≤D90≤20μm, where D50 is the particle size corresponding to a cumulative particle size distribution volume percentage of 50% and D90 is the particle size corresponding to a cumulative particle size distribution volume percentage of 90%.

5. The anti-fog sheet according to claim 2, characterized in that, The thickness of the capsule wall ranges from 50 nm to 250 nm.

6. The anti-fog sheet according to claim 2, characterized in that, The moisture absorption rate of the microcapsules ranges from 10% to 40%.

7. The anti-fog sheet according to any one of claims 1-6, characterized in that, The moisture-absorbing membrane includes a moisture-absorbing ink layer, which comprises microcapsules and ink, wherein the mass fraction of the microcapsules in the moisture-absorbing ink layer ranges from 10% to 70%.

8. The anti-fog sheet according to any one of claims 1-6, characterized in that, The moisture-absorbing membrane includes a base layer, an adhesive component, a breathable layer, and microcapsules. The breathable layer is spaced apart on the side of the base layer away from the main body. The adhesive component is disposed between the base layer and the breathable layer and surrounds the outer periphery of the base layer and the breathable layer, respectively. The base layer, the adhesive component, and the breathable layer define a receiving cavity, and the microcapsules are disposed within the receiving cavity.

9. A back cover assembly, characterized in that, The rear cover assembly includes: Protective lenses; and A back cover is disposed around the outer periphery of the protective lens, wherein at least one of the protective lens and the back cover is an anti-fog film as described in any one of claims 1-8.

10. An electronic device, characterized in that, The electronic device includes: Display screen; A camera module, wherein the camera module has a light-transmitting hole; The back cover assembly of claim 9, wherein the protective lens of the back cover assembly is disposed corresponding to the camera module; the moisture-absorbing film of the anti-fog film is located between the main body and the display screen, and the moisture-absorbing film is disposed away from the light-transmitting hole; and The main processor is electrically connected to both the camera module and the display screen, and is used to control the camera module to take pictures and control the display screen to display.

11. A camera module, characterized in that, The camera module includes: Lens tube; A lens assembly, the lens assembly being housed within the lens barrel and supported by the lens barrel; and A matting sheet, which is supported on the lens barrel and disposed on the object side of the lens group, wherein the matting sheet is an anti-fog sheet as described in any one of claims 1-8, the anti-fog sheet having a matting area and a light-transmitting area, the matting area being disposed around the outer periphery of the light-transmitting area, and the moisture-absorbing film being disposed in the matting area and avoiding the light-transmitting area.

12. An electronic device, characterized in that, The electronic device includes: Display screen; The camera module as claimed in claim 11; and The main processor is electrically connected to both the camera module and the display screen, and is used to control the camera module to take pictures and control the display screen to display.

Images