High-definition moire-free privacy film and display device
By designing an interlocking structure of low and high refractive index layers in the privacy film, the moiré pattern problem is solved, improving the privacy effect and visual experience of the privacy film while maintaining high contrast and brightness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENGSHAN JIACHENG NEW MATERIAL
- Filing Date
- 2025-10-28
- Publication Date
- 2026-07-24
AI Technical Summary
Existing privacy screen protectors are prone to developing moiré patterns during use, which can affect the user's eyesight, reduce screen contrast and brightness, and worsen the privacy viewing angle.
The surface design employs interlocking concave and convex structures with low and high refractive index layers, allowing light to pass through after different refractions, uniformly dispersing the light and avoiding moiré patterns.
It achieves zero moiré pattern when installed at any angle, improving the screen's privacy protection and visual experience while maintaining high contrast and brightness.
Smart Images
Figure CN224553517U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of displays, and more particularly to a high-definition privacy film without moiré patterns and a display device. Background Technology
[0002] Privacy films for electronic display screens are special types of films whose main function is to prevent others from peeping at the screen content. Privacy films utilize ultra-fine louver optical technology, employing a parallel grating structure to control the screen's viewing angle by leveraging the properties of light transmission, refraction, reflection, and diffuse reflection. This structure allows unobstructed light transmission when incident perpendicularly, but as the angle of light increases, the light is gradually blocked by the louver structure, reducing the amount of light transmitted. Therefore, only the user directly facing the screen receives enough light to see it clearly, while onlookers at an angle receive less light, appearing to see only darkness, thus only able to see the screen content from the front and not from the side. This design aims to prevent others from peeping at the screen content and protect user privacy.
[0003] In existing technologies, some users have noticed moiré patterns appearing on their screens after applying privacy screen protectors. These patterns are usually irregular and can affect the user's vision, causing eye fatigue after prolonged use. Current technologies use AG frosted finishes on the surface of privacy screen protectors to address moiré patterns through haze and diffuse reflection of light. However, frosted films reduce screen contrast and brightness, which may strain the eyes and affect vision with prolonged use. Furthermore, the frosted structure alters the angles of light refraction, reflection, and diffuse reflection, resulting in a decrease in the privacy viewing angle from a narrow 30-degree angle to a viewing angle of approximately 50 degrees. Therefore, avoiding moiré patterns is a pressing issue that needs to be addressed. Utility Model Content
[0004] This application provides a high-definition privacy film and display device without moiré patterns, which can avoid the generation of moiré patterns.
[0005] In a first aspect, this application provides a high-definition privacy screen protector without moiré patterns, comprising a substrate, a privacy grating structure, and a combined layer connected sequentially in the thickness direction; the combined layer includes a first structural layer and two second structural layers; in the thickness direction, the first structural layer is disposed between the two second structural layers, and the refractive index of the first structural layer is greater than the refractive index of the second structural layers; the first structural layer and the second structural layers are interlocked by a concave-convex structure.
[0006] Preferably, the thickness of the substrate is between 0.01 mm and 0.1 mm.
[0007] Preferably, the thickness of the privacy grating structure is between 50 μm and 150 μm.
[0008] Preferably, the refractive index of the first structural layer is greater than 1.6.
[0009] Preferably, the refractive index of the second structural layer is less than 1.4.
[0010] Preferably, the concave-convex structure includes a first tooth layer and a second tooth layer. The first tooth layer includes a plurality of first teeth, and a first recess is formed between two adjacent first teeth. The second tooth layer includes a plurality of second teeth, and a second recess is formed between two adjacent second teeth. The first teeth are inserted into the second recess, and the second teeth are inserted into the first recess.
[0011] Preferably, a plurality of first teeth and a plurality of second teeth are arranged in an array in the transverse plane, with each first tooth corresponding to a second recess and each second tooth corresponding to a first recess; the thickness direction is perpendicular to the transverse plane.
[0012] Preferably, the cross-sectional shape of both the first tooth and the second tooth is configured as a triangle, trapezoid, or rectangle.
[0013] Preferably, the first tooth is disposed on the second structural layer, the second tooth is disposed on the first structural layer, the material of the first tooth is the same as that of the second structural layer, and the material of the second tooth is the same as that of the first structural layer.
[0014] Secondly, this application provides a display device, including a display unit and a high-definition privacy film without moiré patterns, wherein the high-definition privacy film without moiré patterns is connected to the display unit.
[0015] The privacy film and display device of this application have at least the following beneficial effects: The privacy film of this application has a combined layer on one side of the privacy grating structure. The combined layer includes a first structural layer and two second structural layers. The refractive index of the first structural layer is greater than that of the second structural layer. By designing an interlocking concave-convex structure on the surface of the low and high refractive index layers, the low and high refractive index layers permeate and interweave with each other. The incident light passes through different refractions and is evenly dispersed after refraction, so that there will be no moiré pattern when the privacy film is installed at any angle. Attached Figure Description
[0016] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a cross-sectional schematic diagram of the high-definition privacy film without moiré patterns of this application; Figure 2 yes Figure 1 Explosion diagram of the middle composite layer; Figure 3 Cross-sectional schematic diagram of the display device; The annotations in the attached figures are explained as follows: 10. Privacy film; 100. Substrate; 200. Privacy grating structure; 300, composite layer; 310, first structural layer; 320, second structural layer; 330, concave-convex structure; 331, first tooth layer; 3311, first tooth; 331a, first recess; 332, second tooth layer; 3321, second tooth; 332a, second recess.
[0017] 20. Display device; 210. Display unit. Detailed Implementation
[0018] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.
[0019] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.
[0020] Example 1: This embodiment provides a high-definition privacy film without moiré patterns and a display device. First, the high-definition privacy film 10 without moiré patterns in this embodiment will be introduced.
[0021] like Figure 1As shown, the high-definition privacy film 10 without moiré patterns in this embodiment includes a substrate 100, a privacy grating structure 200, and a composite layer 300 connected sequentially along the thickness direction. The composite layer 300 includes a first structural layer 310 and two second structural layers 320. In the thickness direction, the first structural layer 310 is stacked in parallel between the two second structural layers 320, and the first structural layer 310 and the second structural layer 320 are interlocked and connected to each other by a concave-convex structure 330.
[0022] The substrate 100 has a rectangular cross-sectional shape and a thickness of 0.01 mm to 0.1 mm (mm represents millimeters), for example, 0.06 mm to 0.08 mm. The surface of the substrate 100 is connected to the first side of the privacy light gate structure 200, and the second side of the privacy light gate structure 200 is connected to the second structural layer 320 of the composite layer 300.
[0023] The function of the privacy grating structure 200 is to prevent peeping. The thickness of the privacy grating structure 200 is between 50μm and 150μm (μm represents micrometers), for example, 80μm to 120μm. The specific structural form of the privacy grating structure 200 can be found in existing technologies.
[0024] The refractive index of the first structural layer 310 of the composite layer 300 is defined as The refractive index of the second structural layer 320 is defined as , Greater than In this embodiment, the two second structural layers 320 have the same shape, material, and refractive index. Preferably, in this embodiment... Greater than 1.6 Less than 1.4.
[0025] like Figure 2 As shown, in the thickness direction, the first second structural layer 320, the first concave-convex structure 330, the first structural layer 310, the second concave-convex structure 330 and the second second structural layer 320 are connected in sequence.
[0026] like Figure 2As shown, in this embodiment, the concave-convex structure 330 includes a first tooth layer 331 and a second tooth layer 332 arranged sequentially in the thickness direction. The first tooth layer 331 includes a plurality of spaced first teeth 3311, and a first recess 331a is formed between two adjacent first teeth 3311. Similarly, the second tooth layer 332 includes a plurality of spaced second teeth 3321, and a second recess 332a is formed between two adjacent second teeth 3321. The first teeth 3311 engage with the second recess 332a, and the second teeth 3321 engage with the first recess 331a. Specifically, along the thickness direction, the first teeth 3311 are inserted into the second recess 332a and the outer contour of the first teeth 3311 is in contact with the inner circumferential contour of the second recess 332a. Similarly, the second teeth 3321 are inserted into the first recess 331a and the outer contour of the second teeth 3321 is in contact with the inner circumferential contour of the first recess 331a. In this embodiment, the first tooth layer 331 and the second tooth layer 332 interlock with each other, and the incident light passes through after different refractions. The light is evenly dispersed after refraction, avoiding the generation of moiré patterns.
[0027] like Figure 2 As shown, there are multiple first teeth 3311, all formed on the surface of the second structural layer 320, forming a first tooth layer 331. These multiple first teeth 3311 are arranged in an array within a transverse plane. Similarly, there are multiple second teeth 3321, all formed on the surface of the first structural layer 310, forming a second tooth layer 332. These multiple second teeth 3321 are also arranged in an array within a transverse plane. In this embodiment, the transverse plane refers to a plane perpendicular to the thickness direction.
[0028] like Figure 2 As shown, in this embodiment, the first tooth 3311 and the second tooth 3321 preferably have the same shape and specifications. For example, the cross-sectional shape of the first tooth 3311 and the second tooth 3321 is configured as a triangle, trapezoid, or rectangle. In this embodiment, a triangle is more preferred. Similarly, the first recess 331a and the second recess 332a also have the same shape and specifications. It can be understood that the shape of the first recess 331a and the second recess 332a is also preferably triangular.
[0029] like Figure 2 As shown, the first tooth 3311 is disposed on the second structural layer 320, and the material of the first tooth 3311 is the same as that of the second structural layer 320. The second tooth 3321 is disposed on the first structural layer 310, and the material of the second tooth 3321 is the same as that of the first structural layer 310. This design facilitates the manufacturing and formation of the first tooth 3311 and the second tooth 3321.
[0030] like Figure 3As shown, this embodiment also discloses a display device. The display device 20 includes a display unit 210 and a high-definition privacy film 10 without moiré patterns. The display unit 210 can refer to an existing display screen. The second structural layer 320 is connected to the display unit 210 on the side opposite to the first structural layer 310.
[0031] Example 2: The difference between this embodiment two and embodiment one is that: A first second structural layer 320 is printed and coated on one side of the privacy grating structure 200, and a first structural layer 310 is printed and coated on the second structural layer 320; a second second structural layer 320 is printed and coated on the first structural layer 310.
[0032] The second structural layer 320 located on the upper side is a special optical resin with a refractive index lower than that of ordinary resins (the refractive index of ordinary resins is about 1.5). Its refractive index is below 1.4, and can even reach 1.2-1.3. This type of material achieves low refractive characteristics through processes such as fluorine modification and polysiloxane synthesis, while also having high light transmittance (light transmittance in the visible light region exceeds 90%), reducing light scattering, and is suitable for reducing interface light signal loss. It has flexible curing methods and can be cured by UV curing or thermal curing. It is made by printing with a frosted structure roller or frosted structure film and then curing by UV light or thermal curing, and the surface is made into an uneven shape.
[0033] The first structural layer 310 is a polymer material with a refractive index typically ranging from 1.64 to 1.74 (ultra-high refractive indices can reach over 1.8). The refractive index can be further increased by adding metal oxides (such as titanium or copper) or sulfur. The primary materials for the first structural layer 310 are epoxy resin and epoxidized resin. It exhibits strong optical stability, is suitable for high-temperature and ultraviolet environments, and offers flexible curing methods, including UV curing or thermal curing. It is manufactured by imprinting with a frosted structure roller or film, followed by UV curing or thermal curing, and the surface is made into an uneven shape.
[0034] The second structural layer 320 located on the lower side is a special optical resin with a refractive index lower than that of ordinary resin (the refractive index of ordinary resin is about 1.5). Its refractive index is below 1.4, and can even reach 1.2-1.3. The upper surface of the second structural layer 320 is made into an uneven shape that interlocks with the first structural layer 310.
[0035] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.
Claims
1. A high-definition privacy film without moiré patterns, characterized in that, It includes a substrate (100), a privacy grating structure (200), and a composite layer (300) connected sequentially in the thickness direction. The composite layer (300) includes a first structural layer (310) and two second structural layers (320); in the thickness direction, the first structural layer (310) is disposed between the two second structural layers (320), and the refractive index of the first structural layer (310) is greater than the refractive index of the second structural layers (320); the first structural layer (310) and the second structural layer (320) are interlocked with each other by a concave-convex structure (330).
2. The high-definition privacy film without moiré patterns according to claim 1, characterized in that, The thickness of the substrate (100) is 0.01mm to 0.1mm.
3. The high-definition privacy film without moiré patterns according to claim 1, characterized in that, The thickness of the privacy grating structure (200) is 50μm~150μm.
4. The high-definition privacy film without moiré patterns according to claim 1, characterized in that, The refractive index of the first structural layer (310) is greater than 1.
6.
5. The high-definition privacy film without moiré patterns according to claim 1, characterized in that, The refractive index of the second structural layer (320) is less than 1.
4.
6. The high-definition privacy film without moiré patterns according to any one of claims 1 to 5, characterized in that, The concave-convex structure (330) includes a first tooth layer (331) and a second tooth layer (332). The first tooth layer (331) includes a plurality of first teeth (3311), and a first recess (331a) is formed between two adjacent first teeth (3311). The second tooth layer (332) includes a plurality of second teeth (3321), and a second recess (332a) is formed between two adjacent second teeth (3321). The first teeth (3311) are inserted into the second recess (332a), and the second teeth (3321) are inserted into the first recess (331a).
7. The high-definition privacy film without moiré patterns according to claim 6, characterized in that, Multiple first teeth (3311) and multiple second teeth (3321) are arranged in an array in a transverse plane, with each first tooth (3311) corresponding to a second recess (332a) and each second tooth (3321) corresponding to a first recess (331a); the thickness direction is perpendicular to the transverse plane.
8. The high-definition privacy film without moiré patterns according to claim 7, characterized in that, The cross-sectional shape of the first tooth (3311) and the second tooth (3321) is configured as a triangle, trapezoid, or rectangle.
9. The high-definition privacy film without moiré patterns according to claim 6, characterized in that, The first tooth (3311) is disposed on the second structural layer (320), and the second tooth (3321) is disposed on the first structural layer (310). The material of the first tooth (3311) is the same as that of the second structural layer (320), and the material of the second tooth (3321) is the same as that of the first structural layer (310).
10. A display device, characterized in that, Includes a display unit (210) and a high-definition privacy film (10) without moiré patterns as described in any one of claims 1 to 9, wherein the high-definition privacy film (10) without moiré patterns is connected to the display unit (210).