Peep-proof film and peep-proof display screen

Abstract

The utility model provides a peep-proof film and a peep-proof display screen. The peep-proof film comprises a dodging layer, a base material layer and a peep-proof layer which are stacked in sequence. The dodging layer comprises a plurality of trapezoidal lenses and light diffusion particles distributed in the trapezoidal lenses. The peep-proof layer comprises light-transmitting areas and light-shielding areas, and the light-transmitting areas and the light-shielding areas are alternately arranged in the first direction. The size of the side, close to the base material layer, of each trapezoidal lens in the first direction is a, the sum of the sizes of one light-transmitting area and one light-shielding area adjacent to the light-transmitting area in the first direction is b, and a is larger than or equal to b. The trapezoidal lens has a certain light gathering effect and can be used as a light emitting surface to improve the brightness, and the built-in light diffusion particles have a light homogenizing effect and can eliminate moire patterns caused when the light diffusion particles are compounded with a display. The size of the side, close to the base material layer, of each trapezoidal lens is at least larger than the sum of the size of one light-transmitting area and the size of one shading area adjacent to the light-transmitting area, and therefore the brightness of the peep-proof film can be further improved, and the brightness influenced by the shading areas in the peep-proof layer is compensated.

Description

Technical Field

[0001] The utility model relates to the technical field of display screens, in particular to an anti-peeping film and an anti-peeping display screen. Background Art

[0002] With the development of electronic displays, users have higher and higher requirements for personal privacy protection. Usually, a protective film with anti-peeping function is pasted outside the display screen. When the viewing angle exceeds a certain range, the content of the electronic screen cannot be seen clearly, so as to achieve the effects of protecting the screen and protecting privacy.

[0003] The anti-peeping film mainly uses the anti-peeping layer in the film layer to play an anti-peeping role. Multiple gratings are arranged in the anti-peeping layer. Using the ultra-fine shutter optical technology, the wide viewing angle of the screen is changed into a narrow viewing angle by controlling the light angle. When light irradiates on the anti-peeping film, most of the light is blocked by the gratings, and only a small part of the light that irradiates on the film basically vertically can be reflected out from the grating intervals, so as to achieve the effects of reducing the visible range of the screen and preventing peeping.

[0004] Since the anti-peeping film usually includes a substrate layer, an anti-peeping layer, etc., its relatively large thickness will inevitably reduce the brightness of the display screen when it is attached to the display screen, bringing many inconveniences to consumers. In addition, affected by the current manufacturing process, the light transmittance of the produced anti-peeping films is not good. If the light transmittance of the anti-peeping film is increased, its anti-peeping performance will be reduced. In addition, the current use process of the anti-peeping film is not mature, and there is no relevant industry standard. When the anti-peeping film is installed on the screen of the display, due to poor die-cutting alignment and other influences, moiré patterns will appear, and the graininess is serious. The anti-peeping film with moiré patterns will hurt the eyes and make the eyes prone to fatigue.

[0005] Therefore, how to improve the brightness of the anti-peeping film and avoid generating moiré patterns is an urgent problem to be solved in the industry. Summary of the Utility Model

[0006] Based on the above problems, the purpose of the utility model is to provide an anti-peeping film and an anti-peeping display screen. This anti-peeping film not only has a high light transmittance but also can avoid generating moiré patterns when compounded with the display, which is beneficial to the popularization and use of the anti-peeping film.

[0007] To achieve the above purpose, on the one hand, the utility model provides an anti-peeping film. The anti-peeping film includes a light homogenizing layer, a substrate layer, and an anti-peeping layer stacked in sequence. Define the direction perpendicular to the stacking direction as the first direction. The light homogenizing layer includes a plurality of trapezoidal lenses and light diffusing particles distributed in each trapezoidal lens. The anti-peeping layer includes a light-transmitting area and a light-shielding area. The light-transmitting area and the light-shielding area are arranged alternately along the first direction. The size of one side of each trapezoidal lens close to the substrate layer in the first direction is a, and the sum of the sizes of one light-transmitting area and an adjacent light-shielding area in the first direction is b, and a≥b.

[0008] In the technical solution adopted by the present utility model, the light homogenizing layer away from the anti-peeping layer includes a plurality of trapezoidal lenses and light diffusing particles distributed in each trapezoidal lens. The trapezoidal lenses have a certain light condensing effect, and as the light-emitting surface, the brightness can be improved. In addition, the built-in light diffusing particles have a light homogenizing effect and can eliminate the moiré pattern caused by the combination with the display. Along the first direction, the size of the side of each trapezoidal lens close to the substrate layer is at least larger than the sum of the sizes of one light-transmitting area and an adjacent light-shielding area, so that the brightness of the anti-peeping film can be further improved, and the brightness affected by the light-shielding area in the anti-peeping layer can be compensated. Therefore, the anti-peeping film of the present utility model can not only improve the brightness but also eliminate the moiré pattern caused by the combination with the display, which is beneficial to subsequent popularization and application.

[0009] As a technical solution of the present utility model, the trapezoidal lens includes an upper top surface away from the substrate layer and a lower bottom surface close to the substrate layer.

[0010] As a technical solution of the present utility model, adjacent trapezoidal lenses are in line contact by means of their respective lower bottom surfaces.

[0011] As a technical solution of the present utility model, the size of the upper top surface is 5 - 500 μm, the size of the lower bottom surface is 20 - 1000 μm, and the distance from the upper top surface to the lower bottom surface is 20 - 600 μm.

[0012] As a technical solution of the present utility model, the lower bottom surface of each trapezoidal lens covers at least a pair of adjacent light-transmitting areas and light-shielding areas.

[0013] As a technical solution of the present utility model, the volume ratio of the light diffusing particles in each trapezoidal lens is 0.1 - 10.0%.

[0014] As a technical solution of the present utility model, the diameter of the light diffusing particles is 50 - 500 nm.

[0015] As a technical solution of the present utility model, the light diffusing particles are selected from at least one of polymethyl methacrylate spheres, silicon oxide spheres, silica gel spheres, polystyrene spheres, melamine spheres, calcium carbonate spheres, and Teflon spheres.

[0016] As a technical solution of the present utility model, the substrate layer is a PMMA board, a PET board, a PP board, a TPU board, or a PE board.

[0017] On the other hand, the present utility model provides an anti-peeping display screen, which includes a display panel and the aforementioned anti-peeping film, and the anti-peeping film is disposed on one side of the display panel. Description of the Drawings

[0018] Figure 1This is a cross-sectional schematic diagram of the anti-peeping film structure of the present utility model.

[0019] Explanation of component symbols

[0020] 100 - Anti-peeping film; 10 - Light homogenizing layer; 11 - Trapezoidal lens; 111 - Upper top surface; 113 - Lower bottom surface; 13 - Light diffusing particles; 30 - Substrate layer; 50 - Anti-peeping layer; 51 - Translucent area; 53 - Light-blocking area; D - First direction; d1 - Size of the upper top surface of the trapezoidal lens; d2 - Size of the lower bottom surface of the trapezoidal lens; d3 - Distance from the upper top surface to the lower bottom surface; d4 - Size of the translucent area in the first direction; d5 - Size of the light-blocking area in the first direction Detailed implementation manners

[0021] To better illustrate the purpose, technical solution and beneficial effects of the present utility model, the present utility model will be further described below with reference to specific drawings. It should be noted that the following drawings are further explanatory illustrations of the present utility model and should not be construed as limitations on the present utility model.

[0022] The anti-peeping film of the present utility model can be used for anti-peeping of mobile phone displays, tablet displays, etc. As Figure 1 shown, the anti-peeping film 100 includes a light homogenizing layer 10, a substrate layer 30 and an anti-peeping layer 50 stacked in sequence. The direction perpendicular to the stacking direction is defined as the first direction D.

[0023] Further as Figure 1 shown, the light homogenizing layer 10 includes a plurality of trapezoidal lenses 11 and light diffusing particles 13 distributed in each trapezoidal lens 11. The trapezoidal lens 11 includes an upper top surface 111 away from the substrate layer 30 and a lower bottom surface 113 close to the substrate layer 30. Adjacent trapezoidal lenses 11 are in line contact through their respective lower bottom surfaces 113. The size d1 of the upper top surface 111 is 5 - 500 μm, further preferably 5 - 300 μm, or 50 - 200 μm, or 100 - 200 μm. The size d2 of the lower bottom surface is 20 - 1000 μm, further preferably 100 - 800 μm, or 200 - 600 μm, or 300 - 500 μm. The distance d3 from the upper top surface 111 to the lower bottom surface 113 is 20 - 600 μm, further preferably 50 - 500 μm, or 100 - 300 μm. The volume ratio of the light diffusing particles 13 in each trapezoidal lens 11 is 0.1 - 10.0%, further preferably 0.1 - 8.0%, or 1.0 - 5.0%. The diameter of the light diffusing particles 13 is 50 - 500 nm, further preferably 100 - 500 nm, or 20 - 400 nm. The light diffusing particles 13 are selected from at least one of polymethyl methacrylate spheres, silica spheres, silicone spheres, polystyrene spheres, melamine spheres, calcium carbonate spheres and Teflon spheres.

[0024] The substrate layer 30 is a PMMA board, a PET board, a PP board, a TPU board or a PE board. The thickness of the substrate layer 30 is 10 - 300 μm, and more preferably 25 - 125 μm.

[0025] The anti-peeping layer 50 includes a light-transmitting area 51 and a light-shielding area 53, and the light-transmitting area 51 and the light-shielding area 53 are arranged alternately along the first direction D. The thickness of the anti-peeping layer 50 is 20 - 250 μm, and more preferably 50 - 250 μm. The light-transmitting area 51 can be a transparent resin or air, that is, the gap formed between adjacent light-shielding areas 53 constitutes the light-transmitting area 51. The light-shielding area 53 can be a black matrix layer light-shielding area made of a light-impermeable material.

[0026] Further, it should be noted that the size of one side of each trapezoidal lens 11 close to the substrate layer 30 along the first direction D is a. The sum of the sizes of one light-transmitting area 51 and an adjacent light-shielding area 53 in the first direction D is b, and a ≥ b, that is, as Figure 1 shown, d2 ≥ d4 + d5. Further, the lower bottom surface 113 of each trapezoidal lens 11 covers at least a pair of adjacent light-transmitting areas 51 and light-shielding areas 53.

[0027] In the anti-peeping film 100 of the present utility model, the trapezoidal lens 11 has a certain light-gathering effect, and as the light-emitting surface, it can improve the brightness. The built-in light-diffusing particles 13 have a light-homogenizing effect and can eliminate the moiré pattern caused by the combination with the display. Along the first direction D, the size of one side of each trapezoidal lens 11 close to the substrate layer 30 is at least larger than the sum of the sizes of one light-transmitting area 51 and an adjacent light-shielding area 53, so that the brightness of the anti-peeping film 100 can be further improved, and the brightness affected by the light-shielding area 53 in the anti-peeping layer 50 can be compensated.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit the protection scope of the present utility model. Although the present utility model has been described in detail with reference to the preferred embodiments, it is not limited to only the embodiments listed. Those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present utility model.

Claims

1. A privacy film, characterized in that: It includes a light-uniform layer, a substrate layer and an anti-peeping layer stacked in sequence, and a direction perpendicular to the stacking is defined as a first direction. The light-uniform layer includes a plurality of trapezoidal lenses and light diffusion particles distributed in each of the trapezoidal lenses. The anti-peeping layer includes a light-transmitting area and a light-shielding area, and the light-transmitting area and the light-shielding area are alternately arranged along the first direction. The size of a side of each of the trapezoidal lenses close to the substrate layer along the first direction is a, and the sum of the sizes of a light-transmitting area and an adjacent light-shielding area in the first direction is b, and a≥b.

2. The privacy film according to claim 1, characterized in that: The trapezoidal lens includes an upper top surface away from the substrate layer and a lower bottom surface close to the substrate layer.

3. The privacy film according to claim 2, characterized in that: Adjacent trapezoidal lenses are in line contact via their respective lower bottom surfaces.

4. The privacy film according to claim 2, characterized in that: The size of the upper top surface is 5 to 500 μm, the size of the lower bottom surface is 20 to 1000 μm, and the distance from the upper top surface to the lower bottom surface is 20 to 600 μm.

5. The privacy film according to claim 2, characterized in that: The lower bottom surface of each of the trapezoidal lenses at least covers a pair of adjacent light-transmitting areas and light-shielding areas.

6. The privacy film according to claim 1, characterized in that: The volume ratio of the light diffusion particles in each of the trapezoidal lenses is 0.1 to 10.0%.

7. The privacy film according to claim 1, characterized in that: The diameter of the light diffusion particles is 50 to 500 nm.

8. The privacy film according to claim 1, characterized in that: The light diffusion particles are selected from at least one of polymethyl methacrylate balls, silicon oxide balls, silica balls, polystyrene balls, melamine balls, calcium carbonate balls and Teflon balls.

9. The privacy film according to claim 1, characterized in that: The substrate layer is a PMMA board, a PET board, a PP board, a TPU board or a PE board.

10. An anti-peeping display screen, characterized in that: The device comprises a display panel and the privacy film according to any one of claims 1 to 9, wherein the privacy film is arranged on one side of the display panel.

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