Peep-proof film

Abstract

The utility model provides a peep-proof film which comprises a peep-proof layer, and the peep-proof layer comprises a plurality of peep-proof structures which are arranged in the width direction of the peep-proof film at intervals. Wherein each peep-proof structure comprises a base and a protrusion arranged on the base, and a reflection side wall is formed on the surface, facing the other peep-proof structure, of the protrusion. According to the embodiment of the utility model, the reflection of light rays between the peep-proof structures can be increased, the light rays finally reflected out of the peep-proof film are reduced, rainbow lines are prevented from being generated, the transmittance of the light rays is improved, and a user can watch the content of a display screen more clearly from the front side.

Description

Technical Field

[0001] The utility model relates to the technical field of protective films, in particular to an anti-peep film. Background Art

[0002] With the rapid advancement of modern technology and the widespread use of electronic products, personal privacy is facing a greater risk of being compromised. In public places, users often worry about others viewing sensitive information on their phones or computers. To address this issue, privacy filters have emerged.

[0003] The privacy screen protector utilizes patented ultra-fine louver optical technology, ensuring that the information displayed on the screen is only visible to the user facing forward, while anyone viewing from the sides sees only a dark image. This technology utilizes a tiny grating structure to control the propagation path of light, reducing the screen's viewing angle and effectively protecting the user's privacy.

[0004] However, while the privacy film's grating structure provides privacy protection, it often compromises display clarity during normal use. During use, external light reflects off the privacy film, affecting the phone's brightness and resulting in a less clear viewing experience than without the film. Furthermore, interference between the reflected light and the phone's light creates rainbow patterns, which can lead to eye soreness, dryness, and even dizziness and blurred vision over time. Utility Model Content

[0005] In order to improve at least some of the above shortcomings or deficiencies, an embodiment of the present invention provides an anti-peep film, which can increase the refraction of light between the anti-peep structures, reduce the reflected light, increase the light transmittance, reduce the interference between light, avoid the generation of rainbow patterns, and make the user see the content of the display screen more clearly when viewing it from the front.

[0006] On the one hand, an embodiment of the present invention provides an anti-peep film, which includes an anti-peep layer, and the anti-peep layer includes a plurality of anti-peep structures arranged at intervals in the width direction of the anti-peep film; wherein, the anti-peep structure includes a base and a protrusion arranged on the base, and the protrusion forms a reflective side wall facing the surface of another anti-peep structure.

[0007] In one embodiment, the protrusion includes a first protrusion and a plurality of second protrusions, the plurality of second protrusions are arranged on both sides of the first protrusion, and the height of the first protrusion is greater than the height of the second protrusion.

[0008] In one embodiment, at least two second protrusions arranged in a stepped manner are respectively provided on both sides of the first protrusion, and the heights of the plurality of second protrusions decrease as the distance between the second protrusion and the first protrusion increases.

[0009] In one embodiment, the top surface of the first protrusion and / or the top surfaces of the plurality of second protrusions are arc-shaped.

[0010] In one embodiment, the reflective sidewall includes a first reflective sidewall and a second reflective sidewall arranged opposite to each other on the protrusions, and a reflective channel is formed between the first reflective sidewall of any protrusion and the second reflective sidewall of another adjacent protrusion.

[0011] In one embodiment, the width of the reflection channel gradually narrows from the top end of the first protrusion to the bottom end of the first protrusion.

[0012] In one embodiment, the second protrusion includes a first height protrusion and a plurality of second height protrusions, and the first height protrusions are respectively arranged on both sides of the second height protrusion.

[0013] In one embodiment, the protrusion is located in the middle of the base, and a plurality of second protrusions are symmetrically arranged on both sides of the first protrusion.

[0014] In one embodiment, the anti-peeping layer further includes a light-transmitting material, and the light-transmitting material covers the anti-peeping structure.

[0015] In one embodiment, the privacy film includes a first substrate layer, a first optical adhesive layer, the privacy layer, a second substrate layer, and a silicone layer sequentially stacked along a thickness direction, and the protrusion protrudes toward the first optical adhesive layer.

[0016] It can be seen from the above that the above technical features of the utility model can have one or more of the following beneficial effects: the anti-peep film provided in this embodiment increases the reflection of light between the anti-peep structures by setting protrusions and reflective side walls, increases the light that finally enters the display screen, improves the transmittance of light, reduces the emitted light, avoids the generation of rainbow patterns, and ensures that users can view the content of the display screen more clearly when viewing it from the front; and the protrusion is set in the middle of the base to ensure that the reflection of light incident from the left and right sides remains consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A cross-sectional view of an anti-peep film provided in an embodiment of the present invention.

[0019] Figure 2 for Figure 1Schematic diagram of the structure of the anti-peeping structure.

[0020] Figure 3 Another cross-sectional view of an anti-peep film provided in an embodiment of the present invention.

[0021] Figure 4 Another cross-sectional view of an anti-peep film provided in an embodiment of the present invention.

[0022] Figure 5 Another cross-sectional view of an anti-peep film provided in an embodiment of the present invention.

[0023] Figure 6 for Figure 5 Schematic diagram of the structure of the anti-peeping structure.

[0024] Figure 7 Another cross-sectional view of an anti-peep film provided in an embodiment of the present invention.

[0025] Figure 8 for Figure 7 Schematic diagram of the structure of the anti-peeping structure.

[0026] Figure 9 Another cross-sectional view of an anti-peep film provided in an embodiment of the present invention.

[0027] Figure 10 A top view of the privacy layer of a privacy film provided by an embodiment of the present invention,

[0028] Reference numerals:

[0029] 10. First substrate layer; 20. First optical adhesive layer; 30. Privacy layer; 310. Privacy structure; 311. Base; 312. Protrusion; 3121. First protrusion; 3122. Second protrusion; 3122a. First height protrusion; 3122b. Second height protrusion; 313. Reflective side wall; 3131. First reflective side wall; 3132. Second reflective side wall; 314. Reflective channel; 320. Light-transmitting material; 40. Second optical adhesive layer; 50. Second substrate layer; 60. Silicone layer. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] like Figure 1 、 Figure 2As shown, an embodiment of the present invention provides a privacy film, comprising a privacy film layer 30, which includes a plurality of privacy films 310 arranged at intervals along the width of the privacy film. The privacy films 310 are, for example, strip-shaped structures extending along the length of the privacy film, and the plurality of privacy films 310 are, for example, gratings. The privacy films 310 include a base 311 and a protrusion 312 disposed on the base 311. The protrusion 312 has a reflective sidewall 313 formed on the surface facing the other privacy films 310.

[0032] The design of the privacy film is to protect the display screen while preventing others from peeping at the content on the display screen from the side. Its core principle is to use a fine louver structure to control the propagation of light. The light transmittance is highest on the front of the display screen. As the angle is tilted, the transmittance gradually decreases and the display screen gradually becomes darker, thus effectively preventing others from peeping at the content on the display screen. When the privacy film is attached to the display screen, the user's line of sight from the front passes through the gap between the privacy structure 310 to the display screen, that is, the user can clearly query and browse the content displayed on the display screen through the privacy film. When others look at the display screen from the sides of the display screen, the human eye's line of sight is to squint at the display screen. At this time, the human eye's line of sight cannot penetrate the privacy structure 310 from the side of the privacy structure 310, that is, the line of sight cannot reach the display screen, and can only see a dark picture, and cannot obtain the content of the display screen. The application scenarios of privacy film include mobile phones, tablets, laptops and ATM machines, etc., which can protect user privacy and display information security.

[0033] Specifically, since the light from the outside world enters the anti-peep structure 310 and is finally reflected through multiple reflections, it will interfere with the light emitted by the electronic device screen itself, resulting in a rainbow-like color distribution, that is, rainbow lines, which will affect the user's clear reading of the screen content and cause damage to the user's eyesight. The technical solution adopted in this application reduces the light reflected from the anti-peep structure 310 by setting a reflective sidewall 313 on the protrusion 312 and the protrusion 312, thereby avoiding the generation of rainbow lines, allowing the user to see the content on the electronic device screen more clearly when using it. Specifically, when light enters the anti-peep structure 310, the light will be reflected onto the reflective sidewall 313 during the reflection process, further reflected, and the number of reflections will increase, thereby increasing the energy of the light that is finally reflected into the display screen, reducing the light that is finally reflected from the anti-peep structure 310, and improving the transmittance of the light. That is, it will reduce the light from the outside world that enters the anti-peep structure 310 and is finally emitted through multiple reflections, thereby reducing the interference between the light and the light emitted by the electronic device screen itself, reducing the generation of rainbow lines, and ensuring the clarity of the display screen during normal use by the user.

[0034] like Figure 3 、 Figure 4 、 Figure 7 、 Figure 9As shown, in one embodiment, the protrusions 312 include a first protrusion 3121 and a plurality of second protrusions 3122. The plurality of second protrusions 3122 are disposed on both sides of the first protrusion 3121, and the height of the first protrusion 3121 is greater than the height of the second protrusion 3122. The outer walls of the first and second protrusions 3121, 3122 are also provided with reflective sidewalls 313. As the number of protrusions 312 increases, the number of reflective sidewalls 313 also increases, thereby increasing the number of light reflections, increasing the amount of light entering the privacy protection structure 310, and increasing the amount of light that passes through; while reducing the amount of light reflected from the privacy protection structure 310, thereby reducing the generation of rainbow patterns.

[0035] like Figure 3 As shown, in one embodiment, the number of second protrusions 3122 is further increased to increase the number of light reflections. At least two second protrusions 3122 are arranged in a stepped manner on both sides of the first protrusion 3121. The height of the multiple second protrusions 3122 decreases as the distance between the second protrusion 3122 and the first protrusion 3121 increases. At the same time, in order to make the middle protrusion 3121 the highest, the first protrusion 3121 is placed in the middle, and the multiple second protrusions 3122 are symmetrically arranged on the left and right sides of the first protrusion 3121, which can maintain the symmetry of the left and right sides and the anti-peeping effect.

[0036] like Figure 4 As shown, in one embodiment, the top surface of the first protrusion 3121 and / or the top surfaces of the plurality of second protrusions 3122 are arc-shaped, and light will be continuously reflected on the surfaces of the first protrusion 3121 and the second protrusion 3122, thereby increasing light scattering.

[0037] like Figure 5-Figure 9As shown, in one embodiment, the reflective sidewalls 313 include a first reflective sidewall 3131 and a second reflective sidewall 3132 disposed oppositely on the protrusion 312. The opposing sidewalls of the protrusion 312 structure serve as reflective sidewalls 313, allowing light to reflect multiple times within the structure rather than directly exiting the display screen. This multiple reflection helps reduce the visibility of the display screen content when viewed from the side. A reflective channel 314 is formed between the first reflective sidewall 3131 of any protrusion 312 and the second reflective sidewall 3132 of another adjacent protrusion 312. Specifically, a gap exists between the first reflective sidewall 3131 of any protrusion 312 and the second reflective sidewall 3132 of another adjacent protrusion 312. Light is reflected multiple times within this gap due to the presence of the first and second reflective sidewalls 3131, 3132, forming the reflective channel 314. The multiple reflections within the reflective channel 314 increase the amount of light ultimately entering the privacy protection structure 310 and reduce the amount of light exiting, ensuring a clearer view of the screen content when in use. It also helps limit the propagation angle of light, thereby reducing light leakage from the sides and enhancing light concentration on the front. For example, UV resin and mold embossing technology can be used to form an anti-peeping structural layer, and filling glue can be used to fill the gaps in the structural layer.

[0038] Specifically, the opposite side walls of the first protrusion 3121 are provided with the first reflective side wall 3131 and the second reflective side wall 3132, and the opposite side walls of the second protrusion 3122 are also provided with the first reflective side wall 3131 and the second reflective side wall 3132. There is a gap between the first reflective side wall 3131 of the first protrusion 3121 and the second reflective side wall 3132 of another adjacent second protrusion 3122, forming the above-mentioned reflective channel 314; there is a gap between the first reflective side wall 3131 of any second protrusion 3122 and the second reflective side wall 3132 of another adjacent second protrusion 3122, also forming the above-mentioned reflective channel 314.

[0039] like Figure 7-Figure 9 As shown, in one embodiment, the width of the reflection channel 314 gradually narrows from the top of the first protrusion 3121 to the bottom of the first protrusion 3121, that is, the width of the reflection channel 314 gradually narrows as it approaches the bottom of the first protrusion 3121. The number of reflections of light in the narrower reflection channel 314 will increase, thereby improving the transmittance of light and reducing the light emitted from the anti-peeping structure 310.

[0040] like Figure 8As shown, in one embodiment, the second protrusion 3122 includes a first height protrusion 3122a and a plurality of second height protrusions 3122b, and the first height protrusions 3122a are respectively arranged on both sides of the second height protrusion 3122b. For example, the height of the first height protrusion 3122a is greater than the height of the second height protrusion 3122b, the first height protrusion 3122a is arranged adjacent to the first protrusion 3121, and the plurality of first height protrusions 3122a and the second height protrusions 3122b are arranged in an alternating manner.

[0041] In one embodiment, protrusion 312 is located in the middle of base 311, with multiple second protrusions 3122 symmetrically positioned on either side of the first protrusion 3121. Placing protrusion 312 in the middle of base 311 ensures symmetry when reflecting light incident from the left and right sides of the display screen, ensuring consistent light reflection conditions regardless of the user's position on the screen. Furthermore, to ensure that the center protrusion 312 is the highest, the first protrusion 3121 is positioned in the middle, with multiple second protrusions 3122 symmetrically positioned on either side of the first protrusion 3121, maintaining symmetry and providing a privacy-preventing effect.

[0042] In one embodiment, the anti-peep layer 30 further includes a light-transmitting material 320 , which covers the anti-peep structure. The light-transmitting material 320 can fill the recess between two adjacent anti-peep structures 310 and fill the anti-peep layer 30 . The light-transmitting material 320 is a transparent material to ensure that light can pass through the light-transmitting material 320 smoothly.

[0043] like Figure 10As shown, in one embodiment, the privacy film includes a first substrate layer 10, a first optical adhesive layer 20, a privacy layer 30, a second substrate layer 50, and a silicone layer 60, stacked sequentially along the thickness direction. The protrusions 312 (i.e., the first protrusions 3121 and the second protrusions 3122) protrude toward the first optical adhesive layer 20. The first substrate layer 10 may be, for example, a tempered film or plastic film. The first optical adhesive layer 20 may be, for example, an optically clear adhesive (OCA), which bonds the privacy layer 30 and the first substrate layer 10 together. This adhesive offers high transparency and excellent bonding properties, ensuring smooth light transmission while maintaining structural stability. The privacy layer 30 is a Venetian blind structure that utilizes the principles of physical optics to control light propagation, ensuring that the inner tube of the display screen is clearly visible only from the front and obscured or invisible from the side, effectively preventing onlookers from peeping. The second substrate layer 50 is an optically transparent film (Polyethylene Terephthalate) with excellent physical and chemical properties, dimensional stability, transparency, and recyclability, further optimizing the optical control effect. The silicone layer 60 is, for example, an optical-grade high-transmittance silicone with high adhesive properties, and is used to adhere the privacy film to the display screen. For example, a release film layer is provided on the side of the silicone layer 60 away from the second substrate layer 50. The release film layer is, for example, a fluorine release film, which can keep the surface of the silicone layer 60 clean and avoid sticking other debris. It is also easy to peel off, which brings convenience to use and strong practicality. The privacy structure 310 can be formed by coating the second substrate layer 50 with a coating material, and then drying and curing the coating material to ensure that the coating material is firmly attached to the second substrate layer 50. The coating material can be a light-curing black glue layer, which is cured by an ultraviolet light source to form a shutter structure. The coating material contains tiny prism structures or optical interference materials. These structures can limit the propagation angle of light to achieve a privacy effect.

[0044] In one embodiment, the privacy film further includes a second optical adhesive layer 40 disposed between the privacy film layer 30 and the second substrate layer 50. The second optical adhesive layer 40, such as an optically clear adhesive (OCA), strengthens the adhesion between the privacy film layer 30 and the second substrate layer 50. Jelly glue may be provided between the second optical adhesive layer 40 and the second substrate layer 50 to facilitate application of the film to curved screens, etc.

[0045] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products or devices.

[0046] In addition, it can be understood that the aforementioned embodiments are merely illustrative descriptions of the present invention. Under the premise that the technical features do not conflict, the structures do not contradict, and the purpose of the invention of the present invention is not violated, the technical solutions of the various embodiments can be arbitrarily combined and used in combination.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A privacy film, characterized in that: The anti-peeping layer (30) includes a plurality of anti-peeping structures (310) arranged at intervals in the width direction of the anti-peeping film; The anti-peep structure (310) comprises a base (311) and a protrusion (312) arranged on the base (311), and the protrusion (312) forms a reflective side wall (313) facing the surface of another anti-peep structure (310).

2. The privacy film according to claim 1, wherein: The protrusion (312) comprises a first protrusion (3121) and a plurality of second protrusions (3122), wherein the plurality of second protrusions (3122) are arranged on both sides of the first protrusion (3121), and the height dimension of the first protrusion (3121) is greater than the height dimension of the second protrusion (3122).

3. The privacy film according to claim 2, wherein: At least two second protrusions (3122) arranged in a stepped manner are respectively provided on both sides of the first protrusion (3121), and the height of the plurality of second protrusions (3122) decreases as the distance between the second protrusion (3122) and the first protrusion (3121) increases.

4. The privacy film according to claim 2, wherein: The top surface of the first protrusion (3121) and / or the top surfaces of the plurality of second protrusions (3122) are arc-shaped.

5. The privacy film according to claim 2, wherein: The reflective side wall (313) comprises a first reflective side wall (3131) and a second reflective side wall (3132) arranged relatively on the protrusion (312), and a reflective channel (314) is formed between the first reflective side wall (3131) of any one of the protrusions (312) and the second reflective side wall (3132) of another adjacent protrusion (312).

6. The privacy film according to claim 5, wherein: The width of the reflection channel (314) gradually narrows from the top of the first protrusion (3121) to the bottom of the first protrusion (3121).

7. The privacy film according to claim 2, wherein: The second protrusion (3122) includes a first height protrusion (3122a) and a plurality of second height protrusions (3122b), and the first height protrusions (3122a) are respectively arranged on both sides of the second height protrusions (3122b).

8. The privacy film according to claim 2, wherein: The protrusion (312) is located in the middle of the base (311), and a plurality of second protrusions (3122) are arranged on both sides of the first protrusion (3121) in a bilaterally symmetrical manner.

9. The privacy film according to claim 1, wherein: The anti-peep layer (30) further comprises a light-transmitting material (320), and the light-transmitting material (320) covers the anti-peep structure (310).

10. The privacy film according to any one of claims 1 to 8, wherein: The privacy film comprises a first substrate layer (10), a first optical adhesive layer (20), the privacy layer (30), a second substrate layer (50), and a silicone layer (60) stacked in sequence along a thickness direction, and the protrusion (312) protrudes toward the first optical adhesive layer (20).

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