Privacy-protection film, display screen module and electronic device

Abstract

The embodiment of the present application provides a kind of peep-proof film, display screen module and electronic equipment, it is related to display technical field.Peep-proof film includes light-transmitting substrate, light-absorbing component, multiple condenser lenses and light-transmitting filler.Light-absorbing component is located in light-transmitting substrate.Light-absorbing component includes multiple light-transmitting grids;Each light-transmitting grid is in the orthographic projection of light-transmitting substrate and forms light-transmitting area.Multiple condenser lenses are located in light-transmitting substrate, and at least part of at least one condenser lens is in the orthographic projection of light-transmitting substrate and is located in light-transmitting area.Light-transmitting filler is filled in each light-transmitting grid.On the basis of peep-proof, condenser lens is used to converge light, so that part of light can be emitted at the angle of the direction of orthovision angle of user orthovision peep-proof film after multiple refraction and / or total reflection of condenser lens, to improve the light output rate of peep-proof film, it is advantageous to improve the brightness of electronic equipment under peep-proof display.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a privacy film, a display module, and an electronic device. Background Technology

[0002] Electronic devices with display functions have become an indispensable part of people's lives. At the same time, the issue of privacy leaks caused by the use of electronic devices has gradually attracted attention. Existing privacy settings typically use privacy films to achieve a slanted viewing angle. Privacy films are generally optical venetian blinds; after a privacy film is installed on an electronic device, the display brightness of the screen decreases, affecting the user experience. Utility Model Content

[0003] This application provides a privacy film, a display module, and an electronic device to improve the brightness of the electronic device under privacy display conditions.

[0004] In a first aspect, one embodiment of this application provides a privacy film, the privacy film comprising a light-transmitting substrate, a light-absorbing component, a plurality of light-concentrating lenses, and a light-transmitting filler. The light-absorbing component is disposed on the light-transmitting substrate. The light-absorbing component includes a plurality of light-transmitting cells. Each light-transmitting cell, when projected onto the light-transmitting substrate, forms a light-transmitting area. The plurality of light-concentrating lenses are disposed on the light-transmitting substrate, and at least a portion of at least one of the light-concentrating lenses is located within the light-transmitting area when projected onto the light-transmitting substrate. The light-transmitting filler fills each of the light-transmitting cells.

[0005] The privacy film provided in this application includes a light-absorbing component that absorbs large-angle light incident on the privacy film, reducing the display viewing angle and achieving the purpose of privacy protection. In addition to privacy protection, a condenser lens is used to converge the light, allowing some of the light to exit at the user's direct viewing angle after multiple refractions and / or total internal reflection through the condenser lens. This increases the light emission rate of the privacy film, which is beneficial for improving the brightness of electronic devices under privacy display conditions and enhancing the user experience. A light-transmitting filler material filling the light-transmitting grid helps to increase the strength of the privacy film.

[0006] According to the first aspect, in one implementation, the light-absorbing component and the light-transmitting filler are both disposed on the same side of the light-transmitting substrate, the light-transmitting filler is in contact with the light-transmitting substrate, and the light-transmitting substrate covers a plurality of light-concentrating lenses, the plurality of light-concentrating lenses being arranged in a layered structure.

[0007] Because the condensing lenses are arranged in a layered structure and stacked with the light-transmitting substrate, in some possible implementations, when preparing the privacy film, multiple condensing lenses can be arranged in an array first, and then the light-transmitting substrate can be covered over the multiple condensing lenses, which facilitates the preparation of the privacy film.

[0008] According to the first aspect, in one implementation, a plurality of the light-concentrating lenses are located on the side of the light-transmitting substrate away from the light-absorbing component, and the plurality of the light-concentrating lenses are located on the light-incident side of the privacy film.

[0009] The light-incident side of a privacy screen protector refers to the side from which light emitted from the display panel is incident. Light emitted from the display panel first enters a condenser lens, where it is focused. Part of the light passes through the light-transmitting substrate and filler before exiting, while the rest is absorbed by the light-absorbing components. Thus, the portion of the incident light entering the privacy screen at a large angle undergoes multiple refractions and / or total internal reflections through the condenser lens, changing its original exit angle. This allows the light to exit at an angle directly in front of the user's viewing angle, reducing the amount of light incident on the light-absorbing components and improving the light extraction efficiency and brightness of the privacy screen protector.

[0010] According to the first aspect, in one implementation, the light-transmitting substrate includes a first surface and a second surface disposed opposite to each other, the light-concentrating lens, the light-absorbing component and the light-transmitting filler are all disposed on the first surface, each light-transmitting grid is disposed around at least two corresponding light-concentrating lenses, and the light-transmitting filler covers the light-concentrating lens.

[0011] In this possible implementation, since the condenser lens is located within the light-transmitting grid, the condenser lens does not occupy any space in the stacking direction, which is beneficial for making the privacy film thinner.

[0012] According to the first aspect, in one implementation, the focusing lens includes an incident surface and an exit surface connected together, the exit surface being disposed on the side of the incident surface facing the light-absorbing component and protruding towards the side where the light-absorbing component is located.

[0013] In this possible implementation, the condenser lens is a convex lens structure. A convex lens structure has a light-convexity effect; by setting the condenser lens as a convex lens structure, it can focus the light entering the lens, thereby converging the light near the angle at which the privacy film is viewed directly. This allows the privacy film to prevent privacy while simultaneously increasing display brightness.

[0014] According to the first aspect, in one implementation, the emitting surface is a partially spherical surface, and / or the focusing lens is a micrometer-scale lens structure. Compared to smaller nanometer-scale lens structures, micrometer-scale lens structures are larger in size, more feasible in manufacturing processes, and easier to fabricate, which helps to reduce the manufacturing cost of privacy films.

[0015] According to the first aspect, in one implementation, the height of the light-concentrating lens in the stacking direction of the light-transmitting substrate and the light-absorbing component is less than or equal to the height of the light-absorbing component in the stacking direction, which is beneficial to reducing the thickness of the privacy film.

[0016] According to the first aspect, in one implementation, within the light-transmitting area, a plurality of the light-concentrating lenses are arranged in an array on the orthogonal projection of the light-transmitting substrate, which is beneficial to further enhance the light-converging effect and further improve the light extraction efficiency of the privacy film.

[0017] According to the first aspect, in one implementation, the light-absorbing component comprises a black resin. The black resin is lightweight and possesses good chemical resistance (resistance to solvents, greases, weak acids and alkalis, etc.) and weather resistance (its resistance to UV aging can be enhanced by additives), making it adaptable to various working environments. The black resin may include resin and additives added to the resin; the additives may include carbon black, etc.

[0018] According to the first aspect, in one implementation, the light-transmitting substrate includes a flexible substrate. The flexible substrate has flexibility and bendability, reducing the possibility of the privacy film breaking due to stress and extending the service life of the privacy film.

[0019] According to the first aspect, in one implementation, the light-transmitting filler includes an optical adhesive.

[0020] According to the first aspect, in one implementation, the refractive index of the light-transmitting filler is less than the refractive index of the condensing lens, which is beneficial to improving the light-concentrating effect of the condensing lens. At least a portion of the light emitted from the condensing lens passes through the light-transmitting filler. The portion of the light emitted from the condensing lens is refracted after entering the light-transmitting filler, and the light rays that are refracted by the light-transmitting filler and then emitted outside the privacy film are closer to the positive viewing angle direction, which is beneficial to improving the brightness of the privacy display.

[0021] According to the first aspect, in one implementation, the refractive index of the condensing lens is in the range of [1.4, 2.5], and the refractive index of the light-transmitting filler is in the range of [1, 1.5], so as to improve the light-concentrating effect of the condensing lens in the privacy film.

[0022] According to the first aspect, in one implementation, the material of the condensing lens includes one of polycarbonate, polyethylene terephthalate, polystyrene, and polymethyl methacrylate.

[0023] Secondly, one embodiment of this application provides a display module, the display module including a display panel and a privacy film according to any implementation of the first aspect, the privacy film being disposed on the display panel. The privacy film is used to achieve privacy-protected display of the display module.

[0024] Thirdly, one embodiment of this application provides an electronic device, the electronic device including a housing and a display module according to the second aspect, the display module being disposed on the housing.

[0025] Fourthly, one embodiment of this application provides an electronic device, the electronic device including a display module and a privacy film according to any implementation of the first aspect, the display module including a display panel and a protective cover plate stacked together, and the privacy film being disposed on the side of the protective cover plate opposite to the display panel. Attached Figure Description

[0026] Figure 1 A perspective view of an electronic device provided in one embodiment of this application;

[0027] Figure 2 A schematic diagram of the structure of an electronic device provided in one embodiment of this application;

[0028] Figure 3 A schematic diagram of a display module and a privacy film assembled together, according to one embodiment of this application;

[0029] Figure 4 A plan view of a privacy film provided according to an embodiment of this application;

[0030] Figure 5 This is a schematic diagram of the structure of a privacy film provided in one embodiment of this application;

[0031] Figure 6 This is a schematic diagram of the light extraction efficiency curve of an electronic device;

[0032] Figure 7 This is a schematic diagram of the structure of a privacy film provided in one embodiment of this application;

[0033] Figure 8 for Figure 7 An enlarged schematic diagram of local region I;

[0034] Figure 9 This is a schematic diagram of the structure of a privacy film provided in one embodiment of this application;

[0035] Figure 10 This is a schematic diagram of the structure of a display module provided in one embodiment of this application.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100 Electronic device; 20 Housing; 30 Display module; 31 Display panel; 32 Protective cover; 321 Substrate; 322 Hardened coating; 40 Privacy film; 41 Transparent substrate; 411 First surface; 412 Second surface; 42 Light-absorbing component; 421 Transparent grid; 43 Condensing lens; 431 Incident surface; 432 Exit surface; 44 Transparent filler. Detailed Implementation

[0038] Please see Figure 1One embodiment of this application provides an electronic device 100, which may be a mobile phone, monitor, tablet computer, in-vehicle computer, watch, e-reader, laptop computer, wearable device, or other electronic device with display function. This application does not impose any special limitations on the specific form of the aforementioned electronic device 100.

[0039] Please refer to the following: Figure 1 and Figure 2 The electronic device 100 includes a housing 20, a display module 30, and a privacy film 40. The housing 20 supports the display module 30. The display module 30 is mounted on the housing 20. The privacy film 40 can be attached to the display module 30 for privacy and protection. When the privacy film 40 needs to be replaced, the user can directly peel it off from the surface of the display module 30, making it convenient for the user. Figure 2 The structure of the electronic device 100 is merely exemplary. The electronic device 100 may also include a processor, a speaker, and other devices, which will not be described in detail here.

[0040] The display module 30 is used to display images. The display module 30 can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a minimized LED, a micro-LED, a quantum dot light-emitting diode (QLED), etc. In some embodiments, a touch sensor can be provided in the display module 30 to form a touchscreen. This application embodiment does not limit the structure and type of the display module 30; the display module 30 only needs to be able to display images. The display module 30 can be a flexible display module 30, and the electronic device 100 can be a foldable terminal. The display module 30 can also be a non-flexible display module 30, and the electronic device 100 can be a foldable terminal or a non-foldable terminal.

[0041] Please see Figure 3The display module 30 may include a display panel 31 and a protective cover 32 stacked together. The protective cover 32 protects the display panel 31 to absorb and disperse the impact of external forces on the display module 30, reducing the risk of the display module 30 breaking or being damaged due to drops, squeezing, or accidental collisions. The display module 30 includes a bonding surface located on the side of the protective cover 32 opposite to the display panel 31, and the bonding surface is used to attach a privacy film 40. The privacy film 40 is attached to the bonding surface. The privacy film 40 can directly contact the bonding surface, or it can be attached to the bonding surface via an adhesive layer.

[0042] Existing privacy settings typically use privacy films to achieve a slanted viewing angle. Privacy films are generally optical venetian blinds. When a privacy film is applied to an electronic device, the display brightness of the screen decreases, affecting the user experience.

[0043] Based on this, please refer to Figure 4 and Figure 5 This application provides a privacy film 40, including a light-transmitting substrate 41, a plurality of light-concentrating lenses 43, a light-absorbing component 42, and a light-transmitting filler 44. The light-absorbing component 42 is disposed on the light-transmitting substrate 41. The light-absorbing component 42 includes a plurality of light-transmitting cells 421. Each light-transmitting cell 421 forms a light-transmitting area in its orthographic projection onto the light-transmitting substrate 41. The plurality of light-concentrating lenses 43 are disposed on the light-transmitting substrate 41. At least a portion of at least one light-concentrating lens 43 is located within the light-transmitting area in its orthographic projection onto the light-transmitting substrate 41. The light-transmitting filler 44 fills each light-transmitting cell 421.

[0044] The privacy film 40 provided in this application has a light-absorbing component 42 that absorbs light incident on the privacy film 40 at large angles, reducing the display viewing angle and achieving the purpose of privacy protection. In addition to privacy protection, a condenser lens 43 is used to converge the light, so that some of the light, after multiple refractions and / or total internal reflections through the condenser lens 43, can be emitted at an angle in the user's direct viewing angle of the privacy film 40, thereby increasing the light emission rate of the privacy film 40. This is beneficial for improving the brightness of the electronic device 100 under privacy display conditions and for improving the user experience. The light-transmitting filler 44 filling the light-transmitting grid 421 helps to improve the strength of the privacy film 40.

[0045] When the privacy film 40 is placed on the electronic device 100 and is in a flat state, the forward viewing direction is the direction perpendicular to the plane where the privacy film 40 is located.

[0046] The light-transmitting substrate 41 can be a flexible substrate to accommodate foldable electronic devices. The flexible substrate has flexibility and bendability, reducing the possibility of the privacy film 40 breaking due to stress and extending its service life. The flexible substrate serves as a support in the privacy film 40. It is also used to attach the privacy film 40 to the bonding surface when it needs to be placed there. Furthermore, the flexible substrate can absorb external impacts (such as drops or crushing), reducing the impact on the display module 30 and lowering the risk of screen breakage. This application does not limit the material of the flexible substrate; for example, it can be a polymer film material. The material of the flexible substrate may include at least one of polyethylene terephthalate (PET), colorless polyimide (CPI), triacetyl cellulose (TAC), polycarbonate (PC), polyurethane (PU), and polyethylene naphthalate (PEN). The thickness of the flexible substrate needs to be selected while taking into account the protection of the display module 30, touch sensitivity, and fit. In some embodiments, the light-transmitting substrate 41 may not be a flexible substrate.

[0047] The light-absorbing component 42 may be, but is not limited to, a black grating structure, which may be a periodic grid structure. The light-absorbing component 42 may, but is not limited to, include black resin. Black resin is lightweight and possesses good chemical resistance (resistance to solvents, greases, weak acids and alkalis, etc.) and weather resistance (its resistance to UV aging can be enhanced by additives), making it adaptable to various working environments. Black resin may include resin and additives added to the resin; additives may include carbon black, etc. The light-transmitting filler 44 may, but is not limited to, optical adhesive, and the light-transmitting filler 44 can provide protection for the light-absorbing component 42 and the condenser lens 43.

[0048] In some embodiments of this application, the light-absorbing component 42 and the light-transmitting filler 44 are both disposed on the same side of the light-transmitting substrate 41. The light-transmitting filler 44 is in contact with the light-transmitting substrate 41, and the light-transmitting substrate 41 is covered with a plurality of condensing lenses 43. The orthographic projection of the light-transmitting grid 421 onto the light-transmitting substrate 41 overlaps with the orthographic projection of the plurality of condensing lenses 43 onto the light-transmitting substrate 41. The plurality of condensing lenses 43 are arranged in a layered structure, and the layered structure and the light-transmitting substrate 41 are stacked in the same stacking direction as the light-absorbing component 42 and the light-transmitting substrate 41. Since the condensing lenses 43 are arranged in a layered structure and stacked with the light-transmitting substrate 41, in some possible implementations, when preparing the privacy film 40, the plurality of condensing lenses 43 can be arranged in an array first, and then the light-transmitting substrate 41 can be covered over the plurality of condensing lenses 43, which facilitates the preparation of the privacy film 40.

[0049] Multiple condensing lenses 43 are arranged in an array, and two adjacent condensing lenses 43 can be in contact. In this way, the light emitted from the display module 30 must enter the multiple condensing lenses 43 for convergence, thereby further improving the light emission rate of the privacy film 40. In some embodiments, the gap between two adjacent condensing lenses 43 projected onto the light-transmitting substrate 41 may not be zero.

[0050] Multiple condensing lenses 43 are located on the side of the light-transmitting substrate 41 facing away from the light-absorbing component 42. The multiple condensing lenses 43 are located on the light-incident side of the privacy film 40. The light-incident side of the privacy film 40 refers to the side where light emitted from the display panel 31 is incident on the privacy film 40. Light emitted from the display panel 31 first enters the condensing lenses 43, and after being converged by the condensing lenses 43, part of the light exits through the light-transmitting substrate 41 and the light-transmitting filler 44, while part of the light is incident on the light-absorbing component 42 and absorbed. The incident light entering the privacy film 40 at a large angle of incidence changes its original exit angle after multiple refractions and / or total internal reflections by the condensing lenses 43, allowing it to exit at an angle within the user's normal viewing angle of the privacy film 40. This reduces the light incident on the light-absorbing component 42, which helps improve the light extraction rate and brightness of the privacy film 40. The condensing lenses 43 are spaced from the light-absorbing component 42 in the stacking direction.

[0051] For example, the light-transmitting grid 421 is generally square. In some embodiments, the light-transmitting grid 421 may not be square; it may be a regular or irregular shape such as a circle or triangle. Multiple light-transmitting grids 421 may have the same or different shapes.

[0052] The condenser lens 43 includes an incident surface 431 and an exit surface 432 connected together. The exit surface 432 is located on the side of the incident surface 431 facing the light-absorbing component 42 and protrudes towards the side where the light-absorbing component 42 is located. That is, the condenser lens 43 is a convex lens structure. The convex lens structure has the function of converging light. By setting the condenser lens 43 as a convex lens structure, the condenser lens 43 can focus the light entering the condenser lens 43, thereby converging the light near the angle of the privacy film 40 when viewed directly. While the privacy film 40 performs its function of privacy protection, it also improves the display brightness.

[0053] The incident surface 431 may, but is not limited to, be a plane. Multiple condensing lenses 43 are located on the side of the light-transmitting substrate 41 away from the light-absorbing component 42. Since the incident surface 431 is a plane, the planes of the multiple condensing lenses 43 can be spliced ​​together to form a planar structure, which is beneficial to improving the flatness of the privacy film 40.

[0054] The exit surface 432 includes a partial spherical surface, and the condensing lens is a micrometer-scale lens structure. Compared to the even smaller nanometer-scale lens structure, the micrometer-scale lens structure is larger in size and easier to manufacture, which helps to reduce the manufacturing cost of the privacy film 40. In some embodiments, the condensing lens 43 can also be a nanometer-scale lens structure.

[0055] The refractive index of the light-transmitting filler 44 may, but is not limited to, be less than that of the condenser lens 43, in order to improve the light-concentrating effect of the condenser lens 43. At least a portion of the light emitted from the condenser lens 43 passes through the light-transmitting filler 44. A portion of the light emitted from the condenser lens 43 enters the light-transmitting filler 44 and is refracted. The light that is refracted by the light-transmitting filler 44 and then emitted outside the privacy film 40 will be closer to the positive viewing angle, which is beneficial to improving the brightness of the privacy display. The refractive index of the condenser lens 43 may, but is not limited to, be in the range of [1.4, 2.5], and the refractive index of the light-transmitting filler 44 may, but is not limited to, be in the range of [1, 1.5], in order to improve the light-concentrating effect of the condenser lens 43 in the privacy film 40. In some embodiments of this application, the refractive index of the light-transmitting filler 44 may be approximately the same as the refractive index of the light-transmitting substrate 41.

[0056] The material of the condenser lens 43 may include, but is not limited to, at least one of polycarbonate (PC), polyethylene terephthalate (PET), polystyrene, and poly(methyl methacrylate) (PMMA).

[0057] Please refer to it again. Figure 5 For example, L1 and L2 are incident on the corresponding condenser lens 43. After total internal reflection, L1 exits through the condenser lens 43 along the light path shown in A1. After refraction, L2 exits through the condenser lens 43 along the light path shown in A2. L3 corresponds to the light path of L1 in the privacy film without a condenser lens, and L4 corresponds to the light path of L2 in the privacy film without a condenser lens. In the privacy film without a condenser lens 43, L1 will be incident on the light-absorbing component. However, the condenser lens 43 changes the light path of L1 and L2 through total internal reflection or refraction, allowing L1 to change its light path and enter the light-transmitting grid, thus increasing the light output of the privacy film 40.

[0058] Please see Figure 6 , Figure 6 The horizontal axis represents the viewing angle, which is the angle by which the light emitted from the privacy screen 40 deviates from the normal viewing angle direction. Figure 6 The vertical axis represents the light output efficiency of electronic device 100, and A1 represents the light output efficiency of electronic device 100. Figure 4 and Figure 5The light emission rate correlation curves of the privacy film 40 shown are as follows: A1 is the light emission rate correlation curve of the privacy film 40 including the condenser lens 43 in the electronic device 100; A2 is the light emission rate correlation curve of the privacy film 40 without the condenser lens 43 in the electronic device 100; and A3 is the light emission rate correlation curve of the electronic device 100 without the privacy film 40. In the range of 0-30 degrees away from the positive viewing angle direction, due to the light-converging effect of the condenser lens 43, the light emission rate of the privacy film 40 including the condenser lens 43 is higher than that without the condenser lens 43.

[0059] Figure 4 The privacy film 40 shown is exemplified with the condenser lens 43 located on the side of the light-transmitting substrate 41 away from the light-absorbing component 42. The condenser lens 43 can also be positioned in other locations. For example, in some embodiments, such as... Figure 7 and Figure 8 As shown, the condensing lens 43 can also be disposed on the same side of the light-transmitting substrate 41 as the light-absorbing component 42 and the light-transmitting filler 44. The light-transmitting substrate 41 includes a first surface 411 and a second surface 412 disposed opposite to each other. The condensing lens 43, the light-absorbing component 42, and the light-transmitting filler 44 are all disposed on the side of the first surface 411 away from the second surface 412. Each light-transmitting grid 421 is disposed around at least two corresponding condensing lenses 43, and the light-transmitting filler 44 covers the condensing lens 43. The height h1 of the condensing lens 43 in the stacking direction of the light-transmitting substrate 41 and the light-absorbing component 42 is less than or equal to the height h2 of the light-absorbing component 42 in the stacking direction. Since the condensing lens 43 is located within the light-transmitting grid 421, the condensing lens 43 does not occupy any space in the stacking direction, which is beneficial for the thinness of the privacy film 40. The height of the condensing lens 43 in the stacking direction of the light-transmitting substrate 41 and the light-absorbing component 42 is h1, and the diameter of the spherical surface is d. The dimensions of h1 and d can determine the curvature of the condensing lens 43. Figure 8 B1 illustrates that the incident light rays, which are incident on the light-transmitting substrate 41 at the first angle, undergo total internal reflection after passing through the condenser lens 43 and exit onto the light-transmitting filler 44. Figure 8In diagram B2, the incident light rays incident on the light-transmitting substrate 41 at a second angle are refracted by the condensing lens 43 and then exit onto the light-transmitting filler 44. The angle between the exiting light ray at B1 and the orthogonal viewing direction is smaller than the angle between the incident light ray at B1 incident on the light-transmitting substrate 41 and the orthogonal viewing direction, and the angle between the exiting light ray at B2 and the orthogonal viewing direction is smaller than the angle between the incident light ray at B1 incident on the light-transmitting substrate 41 and the orthogonal viewing direction. Within the light-transmitting area, the multiple condensing lenses 43 are arranged in an array on the orthogonal projection of the light-transmitting substrate 41. The minimum distance between the orthogonal projections of two adjacent condensing lenses 43 on the light-transmitting substrate 41 can be 0. In other words, multiple condensing lenses 43 are provided within each light-transmitting grid 421, which helps to further enhance the light-gathering effect and improve the light extraction efficiency of the privacy film 40. In addition, the refractive index of the light-transmitting filler 44 can be less than that of the light-concentrating lens 43, and the refractive index of the light-transmitting substrate 41 can be less than that of the light-concentrating lens 43, so as to enhance the light-concentrating effect of the light-concentrating lens 43 in the privacy film 40.

[0060] For example, in some implementations, such as Figure 9 As shown, multiple condensing lenses 43 can also be disposed on the side of the light-transmitting substrate 41 near the light-absorbing component 42. The light-transmitting substrate 41 can wrap around multiple condensing lenses 43, which is beneficial to improving the bonding strength between the multiple condensing lenses 43 and the light-transmitting substrate 41.

[0061] Figure 3 The privacy film 40, as illustrated, is attached to the display module 30 as an external film structure, meaning the privacy film 40 and the display module 30 are detachably connected. When the user needs privacy, the privacy film 40 can be placed on the side of the protective cover 32 facing away from the display panel 31. When the privacy film 40 is no longer needed or needs to be replaced, it can be directly removed. In some embodiments, such as... Figure 10 As shown, the display module 30 includes a display panel 31 and a protective cover 32 stacked together. The protective cover 32 includes a substrate 321, a hardened coating 322, and a privacy film 40. The hardened coating 322 can be disposed between the substrate 321 and the privacy film 40. That is, the privacy film 40 can serve as at least a part of the protective cover 32 of the display module 30. In other words, the privacy film 40 can be integrated into the display module 30, and the privacy film 40 is part of the structure of the display module 30 itself. The protective film can be fixed to the side of the privacy film 40 away from the display panel 31 by an adhesive layer. Other stacked structures can also be disposed between the display panel 31 and the protective cover 32. In some embodiments, the privacy film 40 can also be disposed between the substrate 321 and the hardened coating 322. In some embodiments, the substrate 321 can be omitted, and the light-transmitting substrate 41 of the privacy film 40 serves as the substrate of the protective cover 32.

[0062] It should be understood that expressions such as “comprising” and “may include” used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as “comprising” and / or “having” are to be interpreted as indicating a particular characteristic, number, operation, constituent element, component, or combination thereof, but not to exclude the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0063] Furthermore, in this application, the expression "and / or" includes any and all combinations of the associated listed words. For example, the expression "A and / or B" may include A, may include B, or may include both A and B.

[0064] In this application, expressions including ordinal numbers such as "first" and "second" may modify the elements. However, such elements are not limited by the foregoing expressions. For example, the foregoing expressions do not limit the order and / or importance of the elements. The foregoing expressions are only used to distinguish one element from other elements. For example, "first user equipment" and "second user equipment" refer to different user equipment, although both "first user equipment" and "second user equipment" are user equipment. Similarly, without departing from the scope of this application, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0065] When a component is referred to as "connected" or "accessed" to other components, it should be understood that this component not only connects directly to or accesses other components, but also that another component may exist between this component and other components. On the other hand, when a component is referred to as "directly connected" or "directly accessed" to other components, it should be understood that no component exists between them.

[0066] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A privacy film (40), characterized in that, The privacy film (40) includes: Translucent substrate (41); A light-absorbing component (42) is disposed on the light-transmitting substrate (41), and the light-absorbing component (42) includes a plurality of light-transmitting grids (421); each of the light-transmitting grids (421) forms a light-transmitting area in the orthographic projection of the light-transmitting substrate (41); Multiple condensing lenses (43) are disposed on the light-transmitting substrate (41), and at least a portion of at least one of the condensing lenses (43) has its orthographic projection on the light-transmitting substrate (41) located within the light-transmitting area; A light-transmitting filler (44) is filled into each of the light-transmitting cells (421).

2. The privacy film (40) according to claim 1, characterized in that, The light-absorbing component (42) and the light-transmitting filler (44) are both located on the same side of the light-transmitting substrate (41). The light-transmitting filler (44) is in contact with the light-transmitting substrate (41). The light-transmitting substrate (41) covers a plurality of light-concentrating lenses (43), and the plurality of light-concentrating lenses (43) are arranged in a layered structure.

3. The privacy film (40) according to claim 2, characterized in that, The plurality of light-concentrating lenses (43) are located on the side of the light-transmitting substrate (41) away from the light-absorbing component (42), and the plurality of light-concentrating lenses (43) are located on the light-incident side of the privacy film (40).

4. The privacy film (40) according to claim 1, characterized in that, The light-transmitting substrate (41) includes a first surface (411) and a second surface (412) disposed opposite to each other. The light-concentrating lens (43), the light-absorbing component (42) and the light-transmitting filler (44) are all disposed on the first surface (411). Each light-transmitting grid (421) is disposed around at least two corresponding light-concentrating lenses (43), and the light-transmitting filler (44) covers the light-concentrating lens (43).

5. The privacy film (40) according to claim 1, characterized in that, The focusing lens (43) includes an incident surface (431) and an exit surface (432) connected together. The exit surface (432) is located on the side of the incident surface (431) facing the light-absorbing component (42) and protrudes towards the side where the light-absorbing component (42) is located.

6. The privacy film (40) according to claim 5, characterized in that, The exit surface (432) is a partial spherical surface, and / or the condenser lens (43) is a micron-sized lens structure.

7. The privacy film (40) according to any one of claims 1-6, characterized in that, The height of the condensing lens (43) in the stacking direction of the light-transmitting substrate (41) and the light-absorbing component (42) is less than or equal to the height of the light-absorbing component (42) in the stacking direction.

8. The privacy film (40) according to any one of claims 1-6, characterized in that, Within the light-transmitting area, a plurality of the light-concentrating lenses (43) are arranged in an array on the orthographic projection of the light-transmitting substrate (41).

9. The privacy film (40) according to any one of claims 1-6, characterized in that, The light-absorbing component (42) comprises black resin.

10. The privacy film (40) according to any one of claims 1-6, characterized in that, The light-transmitting substrate (41) includes a flexible substrate.

11. The privacy film (40) according to any one of claims 1-6, characterized in that, The light-transmitting filler (44) includes optical adhesive.

12. The privacy film (40) according to any one of claims 1-6, characterized in that, The refractive index of the light-transmitting filler (44) is less than that of the condensing lens (43).

13. The privacy film (40) according to claim 12, characterized in that, The refractive index of the condenser lens (43) is in the range of [1.4, 2.5], and the refractive index of the light-transmitting filler (44) is in the range of [1, 1.5].

14. The privacy film (40) according to any one of claims 1-6, characterized in that, The material of the condenser lens (43) includes one of polycarbonate, polyethylene terephthalate, polystyrene, and polymethyl methacrylate.

15. A display module (30), characterized in that, The display module (30) includes a display panel (31) and a privacy film (40) according to any one of claims 1-14, wherein the privacy film (40) is disposed on the display panel (31).

16. An electronic device (100), characterized in that, The electronic device (100) includes a housing (20) and a display module (30) according to claim 15, wherein the display module (30) is mounted on the housing (20).

17. An electronic device (100), characterized in that, The electronic device (100) includes a display module (30) and a privacy film (40) according to any one of claims 1-14. The display module (30) includes a display panel (31) and a protective cover (32) stacked together. The privacy film (40) is disposed on the side of the protective cover (32) away from the display panel (31).

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