Peep-proof film

Abstract

The invention discloses a peep-proof film, and relates to the field of optical film materials, the peep-proof film comprises a base material layer and a peep-proof layer, and the peep-proof layer comprises a shielding grating structure and a light guide grating structure; the multiple shielding parts are arranged on the base material layer to form the grating structure, so that the peep-proof function is achieved, the space between the shielding parts is filled with the transparent parts, the quantum particles and the light guide particles are added into the transparent parts, the quantum dots can effectively convert harmful blue light emitted by the electronic screen into harmless light, the eye protection function is achieved, and the service life of the electronic screen is prolonged. The light guide particles can effectively transmit and scatter light along the surfaces of the light guide particles, so that transmission of the light in the whole transparent part is more uniform, and the brightness of the display device is increased.

Description

Technical Field

[0001] This application relates to the field of optical films, and particularly to an anti-peeping film. Background Art

[0002] The anti-peeping film for electronic display screens is a special film layer and is widely used. However, some users find that after applying the anti-peeping film, the screen brightness decreases, and stripy patterns, commonly known as moiré patterns, appear on the screen, which affects the user's eyesight and causes eye fatigue and tiredness after using it for a while.

[0003] The generation of moiré patterns is a visual phenomenon. When the alignment between the pixel pitch of the polarizer and the liquid crystal screen of an electronic display screen device and the stripe pattern of the anti-peeping grille structure does not match, moiré patterns will be generated. Moreover, the pixel pitch of liquid crystal screens of each model and brand is different, so it is difficult for the anti-peeping grille to match each electronic screen, and most of them will produce the moiré effect.

[0004] In the prior art, to solve this phenomenon, during the die-cutting and processing of the anti-peeping film, the angle needs to be adjusted for each electronic screen. Incorrect die-cutting alignment will generate moiré patterns, resulting in the need to adjust the angle of the material, which will reduce the product yield rate and increase the cost of the manufacturer. Moreover, the required angle adjustments for the anti-peeping film corresponding to different display screens are different, and it is necessary to calibrate with the real machine of the display screen to adjust the rotation and swing angle degrees required to eliminate moiré patterns. Also, only one sheet of the sheet material can be processed and die-cut at a time, increasing the quality control difficulty for the manufacturer and reducing the production efficiency.

[0005] In the prior art, some people make the surface of the anti-peeping film into an AG matte treatment to solve the moiré patterns through the haze and the diffuse reflection of light. However, the matte film will reduce the contrast and brightness of the screen, and there is a serious flicker phenomenon, which may cause a certain burden on the eyes and affect eyesight after long-term use. Moreover, the matte structure changes the refraction, reflection, and diffuse reflection angles of light, resulting in a worse anti-peeping angle of the anti-peeping film. The original 30-degree narrow viewing angle becomes a viewing angle of about 50 degrees. To avoid affecting the anti-peeping angle, some people also add diffusion particles under the anti-peeping film and use the haze of the diffusion particles to cover the moiré patterns. However, the diffusion particles require a raised microstructure to achieve the haze. However, when the raised microstructure adheres to the electronic display screen, there is air, which affects the visual effect; if the raised microstructure is filled with pressure-sensitive adhesive, the haze will be lost and the effect of covering the moiré patterns cannot be achieved. Therefore, there is an urgent need for an anti-peeping film that protects the eyes and has uniform brightness to solve the above problems. Summary of the Invention

[0006] The embodiments of this application provide an anti-peeping film that can improve the eye protection effect and brightness of the anti-peeping film.

[0007] This application provides an anti-peeping film, including:

[0008] A substrate layer;

[0009] An anti-peeping layer is provided on the surface of the substrate layer;

[0010] The anti-peeping layer includes an occlusion grid structure and a light guide grid structure. The occlusion grid structure includes a plurality of occlusion parts arranged at intervals, and the occlusion parts are used to occlude light to achieve anti-peeping; the light guide grid structure includes a transparent part filled between two adjacent occlusion parts, and a plurality of quantum particles and a plurality of light guide particles are uniformly distributed in the transparent part.

[0011] The anti-peeping film of the present application has at least the following beneficial effects:

[0012] The anti-peeping film of the present application forms a grid structure by arranging a plurality of occlusion parts on the substrate layer, thereby realizing the anti-peeping function. A transparent part is filled between the occlusion parts, and quantum particles and light guide particles are added to the transparent part. A plurality of quantum particles and light guide particles are uniformly distributed in the transparent part. Quantum dots can effectively convert harmful blue light emitted by the electronic screen into harmless light (such as red light or white light), thereby reducing the harm of blue light to the eyes to achieve the eye protection function. The light guide particles can effectively transmit and scatter light along their surfaces, making the light transmission more uniform inside the entire transparent part, increasing the brightness of the display device, and the brightness can be increased by 10-25%. The light guide particles have high and stable brightness. By adjusting the particle size and refractive index of the light guide particles, the light transmission efficiency can be optimized and moiré interference can be resisted. The present application has high light transmittance. When cutting the anti-peeping film during production, there is no need to swing the angle. After pasting on the electronic display screen, there is no moiré, which can reduce material loss and improve the convenience and production efficiency of cutting and processing. Description of the Drawings

[0013] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0014] Figure 1 is a cross-sectional view of the anti-peeping film in the embodiment of the present application;

[0015] Figure 2 is a cross-sectional view of the anti-peeping film in some other embodiments of the present application;

[0016] The description of the reference numerals is as follows:

[0017] 100. Substrate layer;

[0018] 200. Anti-peeping layer; 201. Occlusion grid structure; 2011. Occlusion part; 202. Light guide grid structure; 2021. Transparent part; 2022. Quantum particles; 2023. Light guide particles;

[0019] 300. Additional functional film layer;

[0020] X: Planar direction of the substrate layer;

[0021] Y: Thickness direction of the substrate layer. Detailed implementation manners

[0022] The features and exemplary embodiments of various aspects of the present application will be described in detail below. To make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below in combination with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than limiting the present application. For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present application by showing examples of the present application.

[0023] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, elements defined by the statement "including..." do not exclude the existence of additional identical elements in the process, method, article or device including the elements.

[0024] As Figure 1 shown, this embodiment discloses an anti-peeping film, which includes a substrate layer 100 and an anti-peeping layer 200 provided on the substrate layer 100.

[0025] The cross-section of the substrate layer 100 in its thickness direction (as shown by the Y direction in Figure 1 ) can be rectangular. The thickness of the substrate layer 100 is 10 μm (μm represents: micron) to 100 μm, for example, 10 μm, 20 μm, 40 μm, 60 μm or 100 μm. The material of the substrate layer 100 is any one of PET (polymer), TPU (plastic raw material), EPU (pearl cotton), TAC (triacetate cellulose), PC (polycarbonate) or PMMA (acrylic), or a combination of these materials.

[0026] As Figure 1As shown, the anti-peeping layer 200 includes an occlusion grille structure 201 and a light guide grille structure 202. The occlusion grille structure 201 includes a plurality of occlusion portions 2011 arranged at intervals. The occlusion portions 2011 are used to occlude light to achieve anti-peeping. The plurality of occlusion portions 2011 are arranged at intervals in the plane direction of the substrate layer 100 (i.e., Figure 1 the X direction shown). The plurality of occlusion portions 2011 form a grille structure above the substrate layer 100. The light guide grille structure 202 includes a transparent portion 2021 filled between two adjacent occlusion portions 2011, that is, a transparent portion 2021 is provided between two occlusion portions 2011 spaced in the plane direction. In some preferred embodiments, a transparent portion 2021 is also filled between the lower surface of the occlusion portion 2011 and the upper surface of the substrate layer 100. A plurality of quantum particles 2022 are uniformly distributed in the transparent portion 2021 and a plurality of light guide particles 2023 are uniformly distributed.

[0027] In some preferred embodiments, the light guide grille structure 202 is made by roll stamping on the substrate layer 100 through a mold and demolding after UV light curing. The occlusion grille structure 201 is filled between the light guide grille structures 202 and made by UV light curing or thermal curing.

[0028] In some preferred embodiments, the interval distance of the plurality of occlusion portions 2011 in the plane direction is 2 μm to 10 μm, such as 2 μm, 4 μm or 10 μm.

[0029] As Figure 1 shown, in some preferred embodiments, the cross-sectional shape of the occlusion portion 2011 in the thickness direction of the substrate layer 100 is an isosceles trapezoid to facilitate achieving good optical effects. Among them, the height of the isosceles trapezoid is 60 μm to 120 μm, the upper base width is 20 μm to 50 μm, the lower base width is 30 μm to 60 μm, and the upper base of the isosceles trapezoid is located on the side close to the substrate layer 100.

[0030] In some preferred embodiments, the material of the occlusion portion 2011 is composed of a light-shielding material and an optical resin. The light-shielding material can refer to the prior art for details.

[0031] In some preferred embodiments, the material of the transparent portion 2021 is configured as an optical resin, such as a UV light-curable optical resin.

[0032] As Figure 1As shown, in some preferred embodiments, the plurality of quantum particles 2022 are configured as red quantum particles 2022 and / or green quantum particles 2022. Among them, in the plurality of quantum particles 2022, they can all be red quantum particles 2022, or they can all be green quantum particles 2022, or a combination of red quantum particles 2022 and green quantum particles 2022. In this embodiment, it is preferred that the plurality of quantum particles 2022 include both red quantum particles 2022 and green quantum particles 2022. The plurality of quantum particles 2022 are uniformly dispersed in the transparent part 2021 (optical resin), and the quantum particles 2022 can effectively convert the harmful blue light emitted by the electronic screen into red light and white light, reducing the harm of blue light to the eyes.

[0033] In some preferred embodiments, the emission peak of the red quantum particles 2022 is 620 nm (nm represents nanometer) to 640 nm; the added weight ratio of the red quantum particles 2022 in the transparent part 2021 is 0.1% to 8%. The emission peak of the green quantum particles 2022 is 520 nm to 545 nm, and the added weight ratio of the green quantum particles 2022 in the transparent part 2021 is 0.1% to 5%.

[0034] As Figure 2 shown, in some other embodiments, the quantum particles 2022 may not be provided in the transparent part 2021, but a plurality of the quantum particles 2022 are uniformly provided in the additional functional film layer 300, and the additional functional film layer 300 is provided on the side of the anti-peeping layer 200 away from the substrate layer 100. Among them, the additional functional film layer 300 includes an attached adhesive layer, a coated hardening layer, a smooth layer or a repair layer.

[0035] As Figure 1 shown, in some preferred embodiments, a plurality of bead-shaped light guide particles 2023 are uniformly distributed in the transparent part 2021 (optical resin), making the transmission of light more uniform inside the entire material and increasing the brightness of the display.

[0036] In some preferred embodiments, the specific material and manufacturing process of the light guide particles 2023 can refer to the light guide powder in the prior art. For example, the light guide particles 2023 are made of composite materials such as high-purity oxides, phosphates, and carbonates. After these materials are finely processed, they can effectively transmit and scatter light along their surfaces, making the transmission of light more uniform inside the entire material and increasing the brightness of the display. The brightness can be increased by about 10 - 25%. The light guide particles 2023 have high and stable brightness, and the light transmission efficiency can be optimized and moiré interference can be resisted by adjusting the particle size and refractive index.

[0037] In some preferred embodiments, the added mass ratio of the light guiding particles 2023 in the transparent part 2021 is 1% to 25%, such as 1%, 5%, 10%, 15% or 25%. Among them, the refractive index of the light guiding particles 2023 is between 1.3 and 1.66; the light guiding particles 2023 are classified by particle size into micron-sized and nano-sized. The micron-sized particle size is 1μm to 8μm, and the nano-sized particle size is 10nm to 500nm. In this embodiment, the light guiding particles 2023 with micron-sized and nano-sized particle sizes each account for 50%.

[0038] In some preferred embodiments, the added mass ratio of the light guiding particles 2023 in the transparent part 2021 is 1% to 25%.

[0039] As mentioned above, the above is only the specific implementation manner of the present application. Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described systems, modules, and units can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here. It should be understood that the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of various equivalent modifications or replacements, and these modifications or replacements should be covered within the protection scope of the present application.

Claims

1. An anti-peeping film, characterized in that, Comprising: A substrate layer; A privacy layer disposed on the surface of the substrate layer; The privacy layer includes an occlusion grating structure and a light guiding grating structure. The occlusion grating structure includes a plurality of spaced occlusion portions for occluding light to achieve privacy. The light guiding grating structure includes transparent portions filled between adjacent occlusion portions, and a plurality of quantum particles and a plurality of light guiding particles are uniformly distributed in the transparent portions.

2. The anti-peeping film according to claim 1, characterized in that, The spacing distance of the occlusion portions in the planar direction of the substrate layer is 2 μm to 10 μm.

3. The anti-peeping film according to claim 1, wherein The cross-sectional shape of the occlusion portion in the thickness direction of the substrate layer is an isosceles trapezoid.

4. The anti-peeping film according to claim 3, characterized in that, The height of the isosceles trapezoid is 60 μm to 120 μm, the upper base width is 20 μm to 50 μm, and the lower base width is 30 μm to 60 μm.

5. The anti-peeping film according to any one of claims 1 to 4, characterized in that The material of the transparent portion is configured as an optical resin.

6. The anti-peeping film according to claim 1, wherein The plurality of quantum particles are configured as red quantum particles and / or green quantum particles.

7. The anti-peeping film according to claim 6, wherein The emission peak of the red quantum particles is 620 nm to 640 nm; the added weight ratio of the red quantum particles in the transparent portion is 0.1% to 8%.

8. The anti-peeping film according to claim 6 or 7, characterized in that, The emission peak of the green quantum particles is 520 nm to 545 nm, and the added weight ratio of the green quantum particles in the transparent portion is 0.1% to 5%.

9. The anti-peeping film according to claim 1, characterized in that, The added mass ratio of the light guiding particles in the transparent portion is 1% to 25%.

10. The anti-peeping film according to claim 9, characterized in that, The refractive index of the light guiding particles is between 1.3 and 1.66.

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