High-definition large-size peep-proof film

Abstract

The utility model relates to the technical field of optical films, and particularly discloses a high-definition large-size peep-proof film. The peep-proof film comprises a peep-proof base material layer and a peep-proof structure layer compounded on the peep-proof base material layer, wherein the peep-proof structure layer consists of a transparent adhesive block I, a transparent adhesive block II and a shading strip; the first transparent adhesive block, the shading strip and the second transparent adhesive block are sequentially arranged on the peep-proof base material layer at equal intervals, and the first transparent adhesive block and the second transparent adhesive block are both regular prismatic tables. The sum of the volumes of the transparent adhesive blocks is greater than the sum of the volumes of the shading strips; the first transparent adhesive block and the second transparent adhesive block both contain transparent tackifying particles. The first transparent adhesive block and the second transparent adhesive block have adhesiveness, so that an adhesive layer can be omitted; meanwhile, light can be transmitted from the transparent adhesive block I and the transparent adhesive block II, the light incidence amount is increased, and the visible light passing rate is improved; the peep-proof film can achieve 360-degree peep-proof, and the possibility that the peep-proof effect is weakened due to the fact that the size of the peep-proof film is increased is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of optical film, more specifically, it relates to a high-definition large-size peep-proof film. BACKGROUND

[0002] In modern life, in order to pursue excellent visual effect, the size of display screen is gradually increased to obtain better visual effect. However, there are few large-size peep-proof films on the market. With the increase of the size of the peep-proof film, the difficulty of peep-proof increases, and the peep-proof effect becomes poor. The peep-proof film generally comprises a base material layer, an adhesive layer and a peep-proof structure layer. With the increase of the size of the peep-proof film, the thickness of the adhesive layer increases to ensure the stable combination between the base material layer and the peep-proof structure layer. The increase of the thickness of the adhesive layer affects the visible light transmittance of the whole peep-proof film, and the visible light transmittance decreases. It is difficult to balance the stability and the visible light transmittance of the large-size peep-proof film. SUMMARY

[0003] In order to solve the problem that the stability and the visible light transmittance of the large-size peep-proof film are difficult to improve, the application provides a high-definition large-size peep-proof film.

[0004] The application provides a high-definition large-size peep-proof film, which adopts the following technical scheme:

[0005] A high-definition large-size peep-proof film comprises:

[0006] a peep-proof base material layer;

[0007] a peep-proof structure layer, which is combined on the peep-proof base material layer and is composed of transparent adhesive blocks one, transparent adhesive blocks two and light-shielding strips; the transparent adhesive blocks one are distributed at equal intervals on the peep-proof base material layer, the transparent adhesive blocks two are distributed at equal intervals between adjacent two transparent adhesive blocks one, and the light-shielding strips are distributed between adjacent transparent adhesive blocks one and transparent adhesive blocks two; the transparent adhesive blocks one and the transparent adhesive blocks two are all right prisms; the sum of the volumes of the transparent adhesive blocks one and the transparent adhesive blocks two is greater than the sum of the volumes of the light-shielding strips; and the transparent adhesive blocks one and the transparent adhesive blocks two both contain transparent tackifying microparticles.

[0008] By adopting the above technical scheme, the transparent tackifying microparticles increase the bonding capacity of the transparent adhesive blocks one and the transparent adhesive blocks two after solidification, so that the transparent adhesive blocks one and the transparent adhesive blocks two can not only play a role of adhesion, but also play a role of support, the peep-proof base material layer and the peep-proof structure layer can be combined and formed without adhesive bonding, light loss caused by the adhesive layer can be avoided, and the combination stability of the large-size peep-proof film is ensured;

[0009] The light shielding strip is located at the side of the transparent adhesive block one and the transparent adhesive block two, the light of the display screen can be emitted from the bottom surface of the transparent adhesive block one and the transparent adhesive block two and emitted from the top surface, and the human eye can view the image from the visual angle formed by the transparent adhesive block one and the transparent adhesive block two respectively; since the volume proportion of the light shielding strip in the anti-peeping structure layer is small, and the light can pass through the transparent adhesive block one and the transparent adhesive block two, the light transmission amount is increased, and the visible light transmittance of the anti-peeping film is high.

[0010] Meanwhile, the transparent adhesive block one and the transparent adhesive block two are designed as right prisms, the light shielding strip is distributed around the side of the transparent adhesive block, and the anti-peeping film can perform 360° anti-peeping, thereby reducing the possibility that the anti-peeping effect is weakened due to the increase in the size of the anti-peeping film.

[0011] Further, the bottom surface of the transparent adhesive block one and the bottom surface of the transparent adhesive block two are square.

[0012] By adopting the above technical solution, when the bottom surface of the transparent adhesive block one is square, the transparent adhesive block is a right quadrangular prism, the right quadrangular prism can realize 360° anti-peeping effect, and compared with a right pentagonal prism and a right hexagonal prism, the right quadrangular prism has low manufacturing difficulty and simple preparation method.

[0013] Further, the size of the transparent adhesive block one and the size of the transparent adhesive block two are the same, and the refractive index of the transparent adhesive block one and the refractive index of the transparent adhesive block two are the same.

[0014] By adopting the above technical solution, the size and the refractive index of the transparent adhesive block one and the transparent adhesive block two are controlled, so that the visual angle from the transparent adhesive block one and the visual angle from the transparent adhesive block two are the same, and the same visual effect is ensured when the screen is viewed.

[0015] Further, the volume ratio of the transparent adhesive block one, the transparent adhesive block two and the light shielding strip is 1:1:(1.54-1.78).

[0016] Further, the top surface side length of the transparent adhesive block one is 150-300 μm, the bottom surface side length of the transparent adhesive block one is 150-300 μm, and the height of the transparent adhesive block one is 375-1500 μm.

[0017] Further, the top surface side length of the transparent adhesive block two is 150-300 μm, the bottom surface side length of the transparent adhesive block two is 150-300 μm, and the height of the transparent adhesive block one is 375-1500 μm.

[0018] By adopting the above technical solution, the size of the top surface and the bottom surface of the transparent adhesive block one and the transparent adhesive block two is controlled, so that the visual angle range can be controlled in a small range, and the stable bonding of the anti-peeping film is ensured.

[0019] Further, the size of the transparent adhesion microparticles is controlled to be 1-10 μm.

[0020] By adopting the technical scheme, when the size of the transparent adhesion microparticles is controlled to be within the range, the transparent adhesion microparticles can refract the light at the top of the anti-peep structure layer, reduce the possibility of the strong light generated by the display screen directly entering the human eye, and play a certain anti-glare role.

[0021] Further, the anti-peep base material layer is obtained by alternately stacking the first resin layer and the second resin layer in sequence, the difference between the refractive indexes of the first resin layer and the second resin layer is greater than or equal to 0.05, the anti-peep base material layer generates a first reflection wave band at 680-1440 nm and a second reflection wave band at 220-480 nm.

[0022] By adopting the technical scheme, after the first resin layer and the second resin layer are stacked, a reflection wave band is generated in a specific wavelength range, when light is emitted at a certain angle from the front as a reference, the interference and diffraction effects are relatively strong, and the light of a specific wavelength is enhanced, therefore, by controlling the wave band range in which the second reflection peak or the third reflection peak appears, the wave band is shifted to the left, so that the anti-peep base material layer presents a golden yellow color, and the anti-peep effect of the anti-peep film is enhanced. At the same time, the anti-peep base material layer can reflect and absorb the short-wave blue-violet light at 220-480 nm, and the anti-peep film plays a certain anti-blue light effect.

[0023] Further, the transparent adhesive block one and the transparent adhesive block two are light yellow.

[0024] By adopting the technical scheme, the transparent adhesive block one and the transparent adhesive block two are light yellow, therefore, the light transmission part of the anti-peep structure layer presents a transparent light yellow color, the anti-peep base material layer generates a second reflection wave band at 220-480 nm, and presents a light blue color in vision, and because of the complementary color mechanism, the light yellow color and the light blue color are complementary colors in optics, and the superposition of the two produces white light, so that the anti-peep film is colorless and transparent in vision from the front perspective, and the visual field is clear and soft. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A cross-sectional structure schematic diagram of a high-definition large-size anti-peep film disclosed in Embodiment 1.

[0026] Figure 2 A top view of a high-definition large-size anti-peep film disclosed in Embodiment 1.

[0027] REFERENCE SIGNS:

[0028] 1, anti-peep base material layer; 11, first resin layer; 12, second resin layer; 2, anti-peep structure layer; 21, transparent adhesive block one; 22, transparent adhesive block two; 23, light shielding strip; 24, transparent adhesion microparticle. DETAILED DESCRIPTION

[0029] Embodiment

[0030] Figure 1 A schematic diagram of the cross-sectional structure of a high-definition large-size privacy film disclosed in Embodiment 1. Referring to Figure 1 A high-definition large-size privacy film, comprising a privacy base layer 1, a privacy structure layer 2 compounded on the privacy base layer 1; the privacy structure layer 2 is composed of transparent adhesive block one 21, transparent adhesive block two 22 and light-shielding strip 23. The privacy structure layer 2 has both adhesion ability and can be directly compounded on the privacy base layer 1 without adhesion layer, and can increase the visible light transmittance through the action of transparent adhesive block one 21 and transparent adhesive block two 22, successfully solving the problem that the stability and visible light transmittance of large-size privacy film are difficult to improve simultaneously.

[0031] Referring to Figure 1 and Figure 2 The transparent adhesive block one 21 and the transparent adhesive block two 22 are both right prism, and the bottom surface of the right prism can be square, regular pentagon, regular hexagon, etc.; in order to reduce the production difficulty, the bottom surface of the right prism in this embodiment is square. The transparent adhesive block one 21 is distributed on the privacy base layer 1 at equal intervals, and the transparent adhesive block one 21 is distributed in a matrix. The top surface side length of the transparent adhesive block one 21 is 150-300 μm, the bottom surface side length is 150-300 μm, and the height is 375-1500 μm. In this embodiment, the top surface side length of the transparent adhesive block one 21 is 150 μm, the bottom surface side length is 300 μm, and the height is 375 μm. The light is incident from the bottom surface of the transparent adhesive block one 21 to the top surface of the transparent adhesive block one 21, and the side surface of the transparent adhesive block one 21 is the light-shielding strip 23, which blocks the light from the side surface of the transparent adhesive block one 21. The privacy film can achieve a privacy angle of 360°.

[0032] Referring to Figure 1The resin material of the transparent adhesive block one 21 can be any one or more of ethylene / propylene copolymer, ethylene / vinyl cyclohexane copolymer, ethylene / vinyl cyclohexene copolymer, ethylene / alkyl acrylate copolymer, ethylene / alkyl methacrylate copolymer, ethylene / norbornene copolymer, ethylene / vinyl acetate copolymer, propylene / butadiene copolymer, isobutylene / isoprene copolymer, and chloroethylene / vinyl acetate copolymer. The transparent adhesive block one 21 is formed by curing the resin material with the addition of curing agent, transparent tackiness microparticles 24, and antioxidant and other additives. The transparent tackiness microparticles 24 are added in an amount of 5-15% by weight of the transparent adhesive block one 21. The transparent tackiness microparticles 24 are made of titanium sol prepared by complexing titanium alkoxide with acetic acid and then hydrolyzing and condensing. The transparent tackiness microparticles 24 not only provide certain strength and support the transparent adhesive block one 21, but also act as tackiness agent to increase the intermolecular van der Waals force and hydrogen bonding, thereby enhancing the bonding strength between the anti-peeping structure layer 2 and the anti-peeping base material layer 1. Meanwhile, the size of the transparent tackiness microparticles 24 is controlled to 1-10 μm. The transparent tackiness microparticles 24 can refract light, reduce the possibility of direct light from the display screen entering the human eye, and have certain anti-glare effect.

[0033] Referring to Figure 1 and Figure 2 The transparent adhesive block two 22 is located between two adjacent transparent adhesive blocks one 21. The top surface of the transparent adhesive block two 22 has a side length of 150-300 μm, the bottom surface has a side length of 150-300 μm, and the height is 375-1500 μm. In this embodiment, the top surface of the transparent adhesive block two 22 has a side length of 300 μm, the bottom surface has a side length of 150 μm, and the height is 375 μm. The resin material of the transparent adhesive block two 22 can be any one or more of ethylene / propylene copolymer, ethylene / vinyl cyclohexane copolymer, ethylene / vinyl cyclohexene copolymer, ethylene / alkyl acrylate copolymer, ethylene / alkyl methacrylate copolymer, ethylene / norbornene copolymer, ethylene / vinyl acetate copolymer, propylene / butadiene copolymer, isobutylene / isoprene copolymer, and chloroethylene / vinyl acetate copolymer. The transparent adhesive block two 22 is formed by curing the resin material with the addition of curing agent, transparent tackiness microparticles 24, and antioxidant and other additives. Light enters from the bottom surface of the transparent adhesive block two 22 and exits from the top surface. When the refractive index of the transparent adhesive block one 21 is the same as that of the transparent adhesive block two 22, the viewing angle from the transparent adhesive block one 21 is the same as that from the transparent adhesive block two 22, ensuring the same visual effect when watching the screen.

[0034] Referring to Figure 1 and Figure 2The distance between the transparent adhesive block one 21 and the transparent adhesive block two 22 is 15 μm. The gap between the transparent adhesive block one 21 and the transparent adhesive block two 22 is filled with light shielding glue, and the light shielding glue forms a light shielding strip 23 after curing. At this time, the volume ratio of the transparent adhesive block one 21, the transparent adhesive block two 22 and the light shielding strip 23 is 1:1:1.78. Since the volume ratio of the light shielding strip 23 in the anti-peep structure layer 2 is small, and the transparent adhesive block one 21 and the transparent adhesive block two 22 can both pass light, the amount of light transmission increases, and the visible light transmittance of the anti-peep film is high. The light shielding glue is obtained by compounding resin material three, curing agent, black pigment and auxiliary agent in a specific proportion. The resin material three can be any one or more of ethylene / propylene copolymer, ethylene / vinyl cyclohexane copolymer, ethylene / vinyl cyclohexene copolymer, ethylene / alkyl acrylate copolymer, ethylene / alkyl methacrylate copolymer, ethylene / norbornene copolymer, ethylene / vinyl acetate copolymer, propylene / butadiene copolymer, isobutylene / isoprene copolymer, and chloroethylene / vinyl acetate copolymer.

[0035] Referring to Figure 1 The anti-peep base material layer 1 is obtained by alternately stacking the first resin layer 11 and the second resin layer 12. The number of layers of the first resin layer 11 and the second resin layer 12 is controlled to be 200-400 layers. The difference in refractive index of the first resin layer 11 and the second resin layer 12 is greater than or equal to 0.05. By controlling the layer thickness and the number of layers, the anti-peep base material layer 1 generates a first reflection band at 680-1440 nm and a second reflection band at 220-480 nm. When light is incident at a certain angle from the front as a reference, the interference and diffraction effects are relatively strong, and the light of a specific wavelength is enhanced. Therefore, by controlling the wavelength range of the second reflection peak or the third reflection peak, the wavelength is shifted to the left, so that the anti-peep base material layer 1 appears golden yellow, and the anti-peep effect of the anti-peep film is enhanced. At the same time, the anti-peep base material layer 1 can reflect and absorb short-wave blue-violet light at 220-480 nm, and the anti-peep film has a certain anti-blue light effect. At the same time, since the transparent adhesion microparticles 24 are titanium sol, they reflect a light yellow color, so that the transparent adhesive block one 21 and the transparent adhesive block two 22 appear transparent light yellow. Therefore, the transparent part of the anti-peep structure layer 2 appears transparent light yellow, and the anti-peep base material layer 1 generates a second reflection band at 220-480 nm, which appears light blue in vision. Since the complementary color mechanism is based on, light yellow and light blue are complementary colors in optics, and their superposition will produce white light. From the front perspective, the anti-peep film appears colorless and transparent in vision, and the visual field is clear and soft.

[0036] The preparation method of the embodiment is as follows:

[0037] The resin material one, the curing agent, the transparent adhesion microparticle 24 and the auxiliary agent are compounded according to a specific proportion to form resin glue one, which is put into a mold, the mold is placed on the anti-peep substrate layer 1, and after the resin glue one is injected, photocuring is carried out, and after curing, the transparent adhesive block one 21 is formed;

[0038] The resin material two, the curing agent, the transparent adhesion microparticle 24 and the auxiliary agent are compounded according to a specific proportion to form resin glue two, which is put into a mold, the mold is placed on the anti-peep substrate layer 1, and after the resin glue two is injected, photocuring is carried out, and after curing, the transparent adhesive block two 22 is formed.

[0039] The transparent adhesive block one 21 and the transparent adhesive block two 22 can be directly compounded with other functional layers, after the compounding is completed; the resin material three, the curing agent, the black pigment and the auxiliary agent are compounded according to a specific proportion to form light-shielding glue, the light-shielding glue is injected between the gaps of the transparent adhesive block one 21 and the transparent adhesive block two 22, after the glue injection, heat curing is carried out, the light-shielding strip 23 is formed, and the anti-peep structure layer 2 is constituted.

[0040] The technical features of the above-described embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that the combinations are within the scope of the present application.

[0041] Moreover, the above-described embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as the limitation of the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A high-definition large-size privacy film, characterized by, include: Privacy-protecting substrate layer (1); The privacy structure layer (2) is composited on the privacy substrate layer (1) and consists of transparent adhesive block one (21), transparent adhesive block two (22) and light-shielding strip (23). The transparent adhesive block one (21) is evenly distributed on the privacy substrate layer (1), the transparent adhesive block two (22) is evenly distributed between two adjacent transparent adhesive blocks one (21), and the light-shielding strip (23) is distributed between adjacent transparent adhesive blocks one (21) and transparent adhesive blocks two (22). The transparent adhesive block one (21) and the transparent adhesive block two (22) are both regular frustums. The sum of the volumes of the transparent adhesive block one (21) and the transparent adhesive block two (22) is greater than the sum of the volumes of the light-shielding strip (23). The transparent adhesive block one (21) and the transparent adhesive block two (22) both contain transparent adhesive microparticles (24).

2. The high-definition large-size privacy film of claim 1, wherein: The bottom surfaces of both the first transparent adhesive block (21) and the second transparent adhesive block (22) are square.

3. The high-definition large-size privacy film of claim 2, wherein: The transparent adhesive block one (21) and the transparent adhesive block two (22) are the same size, and the refractive index of the transparent adhesive block one (21) and the transparent adhesive block two (22) is also the same.

4. The high-definition large-size privacy film of claim 1, wherein: The volume ratio of the first transparent adhesive block (21), the second transparent adhesive block (22), and the light-shielding strip (23) is 1:1:(1.54~1.78).

5. The high-definition large-size privacy film of claim 4, wherein: The top side length of the transparent adhesive block (21) is 150-300 μm, the bottom side length of the transparent adhesive block (21) is 150-300 μm, and the height of the transparent adhesive block (21) is 375-1500 μm.

6. A high definition large size privacy film according to claim 5, wherein: The top side length of the transparent adhesive block 2 (22) is 150-300μm, the bottom side length of the transparent adhesive block 2 (22) is 150-300μm, and the height of the transparent adhesive block 2 (22) is 375-1500μm.

7. The high definition large size privacy film of claim 1, wherein: The size of the transparent adhesive microparticles (24) is controlled between 1 and 10 μm.

8. The high definition large size privacy film of claim 1, wherein: The privacy-protecting substrate layer (1) is formed by alternating layers of a first resin layer (11) and a second resin layer (12), wherein the refractive index difference between the first resin layer (11) and the second resin layer (12) is ≥ 0.05, the privacy substrate layer (1) generates a primary reflection band in the range of 680 to 1440 nm and a secondary reflection band in the range of 220 to 480 nm.

9. A high definition large size privacy film as defined in claim 8, wherein: Both the first transparent adhesive block (21) and the second transparent adhesive block (22) are light yellow.

Images