Automobile anti-reflection light control film

Abstract

The utility model discloses an automobile anti-reflection light control film, which relates to the technical field of protective films and comprises a base layer made of transparent materials. The anti-reflection layer is arranged on the surface of one side of the base layer, and the anti-reflection layer is formed by alternately arranging at least one layer of high-refractive-index film and at least one layer of low-refractive-index film; the light control layer is located on the surface of the side, away from the base layer, of the anti-reflection layer, the light control layer comprises a plurality of microstructures, and the microstructures are one or more combinations of columnar structures, microprism structures or shutter structures; the bonding layer is arranged on the surface of one side, far away from the anti-reflection layer, of the base layer; the protection layer is arranged on the surface of one side, far away from the anti-reflection layer, of the light control layer; the phenomenon of reflection of light emitted by a central control screen and / or an instrument of an automobile on an automobile window and a front windshield is powerfully reduced, and the interference of reflection on the sight of a driver is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of protective film, specifically is a kind of automobile anti-reflection light control film. BACKGROUND

[0002] With the continuous improvement of the intelligent degree of car, the function of car central control screen and instrument is increasingly rich, and its display brightness is also continuously improved.In the daily driving process, especially in the daytime when sunlight is sufficient or at night when ambient light is relatively dark, the light emitted by car central control screen or instrument can form a reflection on the window glass and the front windshield.

[0003] This reflection phenomenon brings many troubles to the driver.In lane changing, the reflection of central control screen or instrument on the window glass can be superimposed with the image in the outside rearview mirror, interfere with the driver's judgment of the position and distance of the vehicle on the side, and increase the risk of lane changing.And when reversing, the reflection on the window glass will affect the driver's observation of the rear obstacles and pedestrians through the rearview mirror, and easily lead to collision accidents.If the reflection is mapped to the front windshield, the driver's vision will be dispersed between the front road and the reflection on the windshield, and the judgment of the front road condition will be interfered, which seriously threatens the driving safety.

[0004] At present, some cars on the market try to reduce the reflection problem by adjusting the brightness, contrast and other parameters of central control screen and instrument, but the effect is not ideal.Because in the adjustment process, the screen content is often too bright or too dark in some environments, which affects normal viewing.Some cars also use the method of changing the interior material to reduce reflection, but it is difficult to fundamentally improve the reflection caused by the light emitted by central control screen and instrument themselves.Therefore, it has important practical significance to develop a kind of automobile anti-reflection light control film that can effectively solve the reflection problem of car central control screen and instrument and ensure driving safety. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a technical scheme that can solve the above problems.

[0006] An automobile anti-reflection light control film, comprising:

[0007] A base layer made of transparent material;

[0008] An anti-reflection layer arranged on one side surface of the base layer, the anti-reflection layer is composed of at least one layer of high refractive index film and at least one layer of low refractive index film arranged alternately;

[0009] A light control layer located on the side surface of the anti-reflection layer away from the base layer, the light control layer comprises a plurality of microstructures, and the microstructure is one or a combination of more of columnar structure, micro-prism structure or louver structure.

[0010] an adhesive layer arranged on the side surface of the base layer away from the anti-reflection layer;

[0011] a protective layer arranged on the side surface of the light control layer away from the anti-reflection layer.

[0012] As a further scheme of the present application, the optical transparent material of the base layer is one of polyethylene terephthalate, polycarbonate or cyclic olefin polymer.

[0013] As a further scheme of the present application, the high-refractive thin film material in the anti-reflection layer is one of titanium oxide, zirconium oxide or zinc oxide.

[0014] The low-refractive thin film material in the anti-reflection layer is one of magnesium fluoride or silicon dioxide.

[0015] As a further scheme of the present application, the adhesive of the adhesive layer is acrylate adhesive or silicone adhesive.

[0016] As a further scheme of the present application, the material of the protective layer is hardened polyurethane or silicon-based coating material.

[0017] As a further scheme of the present application, it further comprises an anti-reflection layer arranged between the anti-reflection layer and the light control layer.

[0018] As a further scheme of the present application, the material of the anti-reflection layer is silicon dioxide.

[0019] As a further scheme of the present application, it further comprises a photonic crystal layer arranged between the anti-reflection layer and the light control layer.

[0020] As a further scheme of the present application, the photonic crystal layer is composed of periodically arranged medium materials with different refractive indexes.

[0021] As a further scheme of the present application, the base layer is uniformly distributed with nanoscale light scattering particles, and the particle size of the nanoscale light scattering particles ranges from 10 to 100 nanometers.

[0022] Compared with the prior art, the present application has the following advantages:

[0023] The anti-reflection layer and the light control layer cooperate with each other to effectively reduce the reflection of the light emitted by the central control screen and / or the instrument of the automobile on the windshield and the front windshield, greatly reducing the interference of the reflection on the driver's vision; after the reflection is reduced, the driver can more clearly observe the outside conditions when changing lanes, reversing and normal driving, thereby effectively reducing the risk of accidents and ensuring driving safety.

[0024] The additional aspects and advantages of the present application will be given in part in the following description, and will become apparent from the following description, or will be learned from the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative labor.

[0026] Figure 1 is a structural schematic diagram of the present application;

[0027] Figure 2 is an explosion structural schematic diagram of the present application in hierarchical distribution;

[0028] Figure 3 is a cross-sectional structural schematic diagram of the present application in hierarchical distribution;

[0029] Figure 4 is a cross-sectional structural schematic diagram of the present application in hierarchical distribution in one embodiment.

[0030] The reference signs and names in the drawings are as follows:

[0031] 1, base layer; 2, anti-reflection layer; 3, light control layer; 4, adhesive layer; 5, protective layer; 6, microstructure; 7, anti-reflection layer; 8, photonic crystal layer; 9, light scattering particles; 10, high refractive index film; 11, low refractive index film. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative labor are within the scope of protection of the present application.

[0033] Please refer to Figures 1-4 In the embodiments of the present application, an automobile anti-reflection light control film comprises:

[0034] The base layer 1 is made of transparent material;

[0035] The anti-reflection layer 2 is arranged on one side surface of the base layer 1, and the anti-reflection layer 2 is composed of at least one high refractive index film 10 and at least one low refractive index film 11 arranged alternately.

[0036] light control layer 3, which is located on the side surface of the anti-reflection layer 2 away from the base layer 1, the light control layer 3 comprising a plurality of microstructures 6, the microstructures 6 being one or more combinations of columnar structures, micro-prism structures or louver structures;

[0037] adhesive layer 4, which is arranged on the side surface of the base layer 1 away from the anti-reflection layer 2;

[0038] protective layer 5, which is arranged on the side surface of the light control layer 3 away from the anti-reflection layer 2.

[0039] In the technical scheme of the utility model:

[0040] In the anti-reflection layer 2, the high refractive index film 10 and the low refractive index film 11 are alternately arranged in order, when light is incident on the film interface, due to the difference in refractive index of different films, the light will be reflected and refracted at the interface, in the high refractive index film 10, the propagation speed of light is relatively slow, while in the low refractive index film 11, the propagation speed is fast, which makes the propagation path and phase of the reflected light in different films different, according to the principle of light interference, when these reflected lights are superimposed again, the reflected lights with specific phase difference cancel each other out, thereby greatly weakening the intensity of reflected light;

[0041] The columnar structure in the light control layer 3, the cross section is usually circular or polygonal, when the light irradiates the columnar structure, the refraction and scattering will occur on the columnar surface, so that the light is scattered to a specific direction, avoiding the direct reflection of light to the area where the driver's eyes are located; the micro-prism structure is similar to a small triangular prism, after the light is incident, refraction and total reflection occur at multiple interfaces of the micro-prism, and the light is guided to other directions, changing the original propagation path of the light and reducing the interference to the driver's vision; the louver structure is composed of a series of leaf-shaped structures arranged in parallel and at intervals, when the light irradiates, the leaves can block part of the light directly reflected, and guide the light transmitted through the leaf gaps, like the control of real louver on light, further reducing the amount of light forming the reflection;

[0042] The anti-reflection layer 2 first reduces the reflection of light, reducing the control burden of the light control layer 3, and the light control layer 3 further regulates the remaining light passing through the anti-reflection layer 2, for example, after the anti-reflection layer 2 reduces the reflection intensity of most light that may form reflection, the microstructure 6 of the light control layer 3 scatters, refracts and directs the remaining light, guiding the light that may still interfere with the driver's vision after passing through the anti-reflection layer 2 to other harmless directions, and the two cooperate with each other to reduce the probability of light forming reflection on the glass and interfering with the driver's vision in all directions;

[0043] The base layer 1 is made of transparent material, mainly provides stable support for the anti-reflection layer 2 and the light control layer 3, and ensures that light can pass through smoothly, so that the central control screen and the instrument display are not affected; the adhesive layer 4 firmly pastes the anti-reflection light control film on the required parts of the central control screen and the instrument of the automobile, so that the film is tightly attached to the surface of the object; the protective layer 5 is located on the outer side of the light control layer 3, mainly used to protect the light control layer 3 and the anti-reflection layer 2, prevent scratching, wear and tear and dust pollution, prolong the service life of the anti-reflection light control film;

[0044] In summary, the anti-reflection layer 2 and the light control layer 3 cooperate with each other to effectively reduce the reflection phenomenon of the light emitted by the central control screen and / or the instrument of the automobile on the windshield and the front windshield, greatly reducing the interference of the reflection on the driver's vision; after reducing the reflection, the driver can more clearly observe the external conditions when changing lanes, reversing and normal driving, thereby effectively reducing the risk of accidents and ensuring driving safety.

[0045] In the embodiment of the utility model, the optical transparent material of base layer 1 is one of polyethylene terephthalate, polycarbonate or cyclo olefin polymer.

[0046] Polyethylene terephthalate (PET), polycarbonate (PC) and cyclo olefin polymer (COP) all have good optical transparency, which can minimize the absorption and scattering of light when passing through the base layer 1, ensuring that the light emitted by the central control screen and the instrument can efficiently and clearly pass through the base layer 1 to the anti-reflection layer 2 and the light control layer 3, and then realize the subsequent regulation of light.

[0047] In the embodiment of the utility model, the high refractive index film 10 material in the anti-reflection layer 2 is one of titanium oxide, zirconium oxide or zinc oxide.

[0048] The low refractive index film 11 material in the anti-reflection layer 2 is one of magnesium fluoride and silicon dioxide.

[0049] The high refractive index film 10 material such as titanium oxide (TiO2), zirconium oxide (ZrO2) or zinc oxide (ZnO) has a high refractive index, and is alternately arranged with the low refractive index film 11 material to form the anti-reflection layer 2. When light is incident on the anti-reflection layer 2, the optical characteristics of different refractive index films are used to make the reflected light interfere and cancel at the film interface. The low refractive index film 11 material such as magnesium fluoride (MgF2) and silicon dioxide (SiO2) has a low refractive index, and is matched with the high refractive index film 10 to form a large refractive index contrast and enhance the interference effect.

[0050] In the embodiment of the utility model, the adhesive of the adhesive layer 4 is an acrylate adhesive or a silicone adhesive; and the material of the protective layer 5 is hardened polyurethane or a silicon-based coating material.

[0051] The acrylate adhesive and the silicone adhesive have good bonding performance, can be tightly combined with the material of the base layer 1 and the surface of the automotive center screen or instrument, can form firm chemical bonds or physical adsorption between different materials, ensure that the anti-reflection light control film can be stably attached to the target surface and is not easy to fall off, and the two adhesives also have certain flexibility, can adapt to the curvature and possible deformation of the surface of the automotive center screen or instrument, and maintain good bonding effect.

[0052] The hardened polyurethane and silicon-based coating materials have high hardness and wear resistance, can form a firm protective barrier on the surface of the light control layer 3, can prevent external objects from scratching, wearing or damaging the microstructure 6 of the light control layer 3, and ensure that the light control layer 3 can work normally.

[0053] In the embodiment of the utility model, the base layer 1 is evenly distributed with nano light scattering particles 9, and the particle size range of the nano light scattering particles 9 is 10-100 nanometers.

[0054] When light is incident on the base layer 1, the nano light scattering particles 9 will scatter the light due to the similar particle size and wavelength of the light; according to Mie scattering theory, the scattering effect of particles with a particle size of 10-100 nanometers on light is more significant, and the intensity and direction of the scattered light will be different due to factors such as the size and shape of the particles and the wavelength of the incident light; these evenly distributed nano light scattering particles 9 can scatter the incident light in all directions, thereby changing the propagation path of the light and achieving scattering control of the light; that is, the scattering effect of the nano light scattering particles 9 on the light can disperse the originally strong reflected light, reduce the intensity of the reflected light, and thus effectively reduce glare.

[0055] In one embodiment of the utility model embodiment, a light transmission layer 7 is arranged between the anti-reflection layer 2 and the light control layer 3; the material of the light transmission layer 7 is silicon dioxide.

[0056] The silicon dioxide light transmission layer 7 is arranged between the anti-reflection layer 2 and the light control layer 3, and the interference principle of light is used; when the light enters the light transmission layer 7 from the anti-reflection layer 2 and then enters the light control layer 3, the thickness of the light transmission layer 7 is designed as an integer multiple of the half wavelength of a specific wavelength of light in the material, so that the light reflected on the two interfaces of the light transmission layer 7 will interfere destructively, thereby reducing the reflected light, increasing the transmitted light, improving the light transmittance, and enabling more light to effectively reach the light control layer 3 and be reasonably controlled.

[0057] In another embodiment of the utility model embodiment, a photonic crystal layer 8 is arranged between the anti-reflection layer 2 and the light control layer 3; the photonic crystal layer 8 is composed of periodically arranged medium materials with different refractive indexes.

[0058] The photonic crystal is a structure formed by periodically arranging medium materials with different refractive indexes, and has a photonic band gap characteristic; when light is incident on the photonic crystal layer 8, lights of different frequencies propagate in the periodic structure; due to the periodic change of the refractive index, the light is subjected to Bragg scattering; in a specific frequency range, the propagation of the light is prohibited, forming a photonic band gap; by designing the structure of the photonic crystal and the refractive index, arrangement period and other parameters of the medium material, the photonic band gap can be matched with the wavelength range of the light to be controlled, so that the selective transmission, reflection or absorption of the light of a specific wavelength is realized; the photonic crystal layer 8 is arranged between the anti-reflection layer 2 and the light control layer 3, the photonic band gap characteristic of the photonic crystal layer 8 can be used to further control the light, and the anti-reflection layer 2 and the light control layer 3 cooperate to optimize the control effect on the light.

[0059] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

Claims

1. An antireflective control film for automobiles, characterized by comprising: The application relates to an anti-reflection film, which comprises the following parts: a base layer made of transparent material; an anti-reflection layer arranged on one side surface of the base layer, which is composed of at least one high-refractive thin film and at least one low-refractive thin film arranged alternately; a light control layer located on the side surface of the anti-reflection layer away from the base layer, which comprises a plurality of microstructures, and the microstructures are one or more combinations of columnar structures, micro-prism structures or louver structures; a bonding layer arranged on the side surface of the base layer away from the anti-reflection layer; a protective layer arranged on the side surface of the light control layer away from the anti-reflection layer.

2. The antireflective control film according to claim 1, wherein The optical transparent material of the base layer is one of polyethylene terephthalate, polycarbonate or cyclic olefin polymer.

3. The antireflective control film according to claim 1, wherein the antireflective control film has a thickness of 0.1 to 10 μm. The high-refractive thin film material in the anti-reflection layer is one of titanium oxide, zirconium oxide or zinc oxide; The low-refractive thin film material in the anti-reflection layer is one of magnesium fluoride and silicon dioxide.

4. The antireflective control film according to claim 1, wherein The adhesive of the bonding layer is acrylate adhesive or silicone adhesive.

5. The antireflective control film according to claim 1, wherein The material of the protective layer is hardened polyurethane or silicon-based coating material.

6. The antireflective control film according to claim 1, wherein the antireflective control film has a thickness of 0.1 to 10 μm. The application further comprises an anti-reflection layer arranged between the anti-reflection layer and the light control layer.

7. The antireflective control film according to claim 6, wherein the antireflective control film has a thickness of 0.1 to 1.0 μm. The material of the anti-reflection layer is silicon dioxide.

8. The antireflective control film according to claim 1, wherein the film has a thickness of 0.1 to 10 μm. The application further comprises a photonic crystal layer arranged between the anti-reflection layer and the light control layer.

9. The antireflective control film according to claim 8, wherein the antireflective control film has a thickness of 0.1 to 1.0 μm. The photonic crystal layer is composed of periodically arranged medium materials with different refractive indexes.

10. The antireflective control film according to claim 1, wherein The base layer is uniformly distributed with nanoscale light scattering particles, and the particle size of the nanoscale light scattering particles ranges from 10 to 100 nanometers.

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