TW202335857A - Optical assembly and electronic device comprising same - Google Patents

Abstract

The present invention relates to an optical assembly and an electronic device comprising the optical assembly. The optical assembly comprises a substrate, and a first film layer and a second film layer which are sequentially stacked on the surface of the substrate. Anti-reflective particles with mass percentage of 1% to 20% are dispersed in the second film layer. The anti-reflective particles comprise, by mass percentage, 48% to 52% of first anti-reflective particles, 28% to 32% of second anti-reflective particles and 18% to 22% of third anti-reflective particles. The particle size of the first anti-reflective particles is greater than or equal to 50 nm and less than or equal to 100 nm. The particle size of the second anti-reflective particles is greater than or equal to 20 nm and less than 50 nm. The particle size of the third anti-reflective particles is less than 20 nm. The optical assembly has anti-reflective optical performance while having high wear resistance and bending resistance.

Description

Optical components and electronic devices containing the same

The present invention relates to the field of optical technology, and in particular to an optical element and an electronic device including the optical element.

Anti-reflection refers to reducing or eliminating the reflected light on the surface of the optical element, thereby increasing the light transmission of the optical element and reducing or eliminating the stray light of the system. For electronic products such as mobile phones and monitors, effective anti-reflection devices are needed to reduce the reflectivity, so as to achieve the purpose of making the edges of electronic products present a "black" appearance. "All-in-one black" will make the appearance of electronic products evenly black and more beautiful. At the same time, with the widespread application of flexible screens and folding screens in electronic products, "all-in-one black" can also make flexible screens and folding screens more comfortable when curved or folded. The creases created when folding appear less noticeable. However, if traditional anti-reflective coatings are applied directly to flexible screens or foldable screens, the coating will crack after being bent or folded for a period of time. Therefore, there is a need to further develop anti-reflection devices that can be applied to flexible screens and folding screens and have good bending resistance.

The research and development of traditional anti-reflection devices mainly has two directions. The first direction is to apply a low-refractive index coating on the surface of electronic products. The refractive index of the coating (Refractive Index) is generally between 1.35 and 1.40. When light passes through different substances, the refractive index of the substances is different. Therefore, according to Snell's law, light will be refracted and reflected (as shown in Figure 1). However, the theoretical calculation of reflectivity is only related to the refractive index. The reflectance R (Reflectivity) calculation formula is , so simply reducing the reflectivity by changing the refractive index (N ₁ ) of the material will have physical limitations. The range of reflectivity reduction is limited, and the low-refractive index coating is not scratch-resistant and easily brittle. An additional coating process will be added to the construction. In addition, low-refractive index coating materials are scarce and expensive. Further screening is required to meet the adhesion to the underlying coating, and the available materials are very limited.

The second direction is to add some particles to the hardened coating on the surface of electronic products to reduce reflectivity. However, by introducing additional particles into the hardened coating, although a lower degree of reflectivity can be obtained, the surface wear resistance of the hardened coating will be reduced, making it difficult to apply it to coatings such as screen surfaces of electronic products.

At the same time, the two traditional research directions have paid less attention to the bending resistance of anti-reflection devices.

Based on this, the present invention provides an optical element that not only has anti-reflective optical properties, but also has high wear resistance and bending resistance, and an electronic device including the same.

A first aspect of the present invention provides an optical element, including a base material, and a first film layer and a second film layer sequentially laminated on the surface of the base material, with a mass percentage of 1% dispersed in the second film layer. ~20% anti-reflective particles; In terms of mass percentage, the anti-reflective particles include 48% to 52% of the first anti-reflective particles, 28% to 32% of the second anti-reflective particles, and 18% to 22% of the third anti-reflective particles; Wherein, the particle diameter of the first anti-reflective particles is ≥50nm and ≤100nm; The particle size of the second anti-reflective particles is ≥20nm and <50nm; The particle size of the third anti-reflective particles is <20 nm.

In one embodiment, the mass percentage of the anti-reflection particles in the second film layer is 10% to 20%.

In one embodiment, the anti-reflective particles have a solid structure.

In one embodiment, the material of the anti-reflective particles is selected from one or more of silicon dioxide and titanium dioxide.

In one embodiment, the second film layer is prepared by dispersing the anti-reflective particles in a colloid and solidifying it. In terms of mass percentage, the raw materials for preparing the colloid include: 20%~40% polyacrylic resin, 10%~30% epoxy resin, 20%~40% acrylate oligomer, 5%~25% UV monomer diluent and 1%~5% Photoinitiator.

In one embodiment, in terms of mass percentage, the raw materials for preparing the first film layer include: 20%~40% polyacrylic resin, 10%~30% epoxy resin, 20%~40% acrylate oligomer, 5%~25% UV monomer diluent and 1%~5% Photoinitiator.

In one embodiment, the refractive index of the first film layer is greater than the refractive index of the second film layer.

In one embodiment, the thickness of the second film layer is 0.1 μm ~ 2 μm; and/or The thickness of the first film layer is 3 μm~10 μm.

In one embodiment, the material of the substrate is polyimide, polyethylene terephthalate, cellulose triacetate, glass, polycarbonate or polymethyl methacrylate.

A second aspect of the present invention provides an electronic device, including a body and an anti-reflection device embedded in the body, where the anti-reflection device is the optical element as described above.

In one embodiment, the anti-reflection device is a protective cover.

The above-mentioned optical element sets a first film layer between the base material and the second film layer, while reasonably controlling the proportion of anti-reflective particles in the second film layer, and using three types of anti-reflective particles with different particle sizes to set a reasonable gradation. , thus: 1) Through the cooperation between three types of anti-reflection particles with different particle sizes, reflection can be reduced to the greatest extent, ensuring the anti-reflection optical properties of the element, and at the same time, a relatively stable film can be formed in the second film layer The connection within the glue makes the film layer have better wear resistance and can ensure the hardness of the film layer; 2) The second film layer dispersed with an appropriate amount of three types of anti-reflective particles of different particle sizes also has a certain degree of flexibility and can be matched with the settings The first film layer makes the adhesion between the second film layer and the substrate dense, so that the optical element can have better bending resistance.

In addition, the above-mentioned optical elements can be used as the outermost protective layer of electronic devices to protect internal structures, such as display panels and touch components. When users click on electronic devices, the internal structures will not be damaged.

The optical element of the present invention and the electronic device including the optical element will be described in further detail below with reference to specific embodiments. The invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which the invention belongs. The terminology used herein in the description of the invention is for the purpose of describing specific embodiments only and is not intended to limit the invention.

In the present invention, "one or more" refers to any one, any two or more than two of the listed items.

In the present invention, "first aspect", "second aspect", etc. are only used for descriptive purposes and cannot be understood as indicating or implying the relative importance or quantity, nor can they be understood as implicitly indicating the importance or quantity of the indicated technical features. quantity. Moreover, "first", "second", etc. only serve the purpose of non-exhaustive enumeration and description, and it should be understood that they do not constitute a closed limitation of quantity.

In the present invention, the technical features described in open terms include closed technical solutions composed of the listed features, and also include open technical solutions including the listed features.

In the present invention, when it comes to numerical intervals, unless otherwise specified, the above numerical interval is regarded as continuous and includes the minimum value and maximum value of the range, as well as every value between the minimum value and the maximum value. Further, when a range refers to an integer, every integer between the minimum value and the maximum value of the range is included. Additionally, when multiple ranges are provided to describe a feature or characteristic, the ranges can be combined. In other words, unless otherwise indicated, all ranges disclosed herein are to be understood to include any and all subranges subsumed therein.

In the present invention, the percentage content involved, unless otherwise specified, refers to mass percentage for solid-liquid mixing and solid-solid phase mixing, and refers to volume percentage for liquid-liquid phase mixing.

In the present invention, the percentage concentration involved refers to the final concentration unless otherwise specified. The final concentration refers to the proportion of the added component in the system after adding the component.

In the present invention, if the temperature parameter is not particularly limited, it is allowed to be treated at a constant temperature, or it is allowed to be treated within a certain temperature range. The thermostatic treatment described allows the temperature to fluctuate within the accuracy of the instrument control.

In the present invention, "laminated on the surface of..." and "arranged between..." may refer to direct contact with the stacked (arranged) objects, or indirect contact with the stacked (arranged) objects, that is, connection through other intermediate structures.

In the present invention, "oligomer" refers to a polymer composed of fewer repeating units, and its relative molecular mass is between small molecules and macromolecules. Without limitation, "oligomer" in the present invention refers to a polymer composed of 10 to 20 repeating units.

The invention provides an optical element, which includes a base material and a first film layer and a second film layer sequentially laminated on the surface of the base material. Anti-reflection particles with a mass percentage of 1% to 20% are dispersed in the second film layer; In terms of mass percentage, the anti-reflective particles include 48% to 52% of the first anti-reflective particles, 28% to 32% of the second anti-reflective particles and 18% to 22% of the third anti-reflective particles; among which, the first anti-reflective particles The particle diameter of the reflective particles is ≥50nm and ≤100nm; the particle diameter of the second anti-reflective particles is ≥20nm and <50nm; the particle diameter of the third anti-reflective particles is <20nm.

It can be understood that the main function of the first film layer is to form a transition between the substrate and the second film layer, that is, as a transition layer to make the adhesion between the second film layer and the substrate dense.

Without limitation, the second film layer can be any functional film layer on the surface of the electronic device substrate, and is configured according to different electronic devices. Further, the second film layer is not an optical coating. In one specific example, the second film layer is a protective film layer, which provides encapsulation and protection for the film layer below it. Further, the second film layer is a hard layer.

Without limitation, the anti-reflection principle of the above optical elements is as follows: When light enters the second film layer of an optical element and encounters dispersed anti-reflective particles, the light will change its original straight path, resulting in changes in refraction and reflection. Anti-reflective particles of different particle sizes change the direction of light. The paths of refraction and reflection are different. Light undergoes more refraction and reflection between anti-reflection particles of different particle sizes, and the reflectivity is therefore lowered. See Figures 1 and 2. Figure 1 shows the refraction and reflection behavior of normal light when it travels through dielectric materials. Figure 2 shows that when light encounters anti-reflection particles dispersed in the second film layer, it changes its original path and also changes the light. refraction and reflection paths, thereby reducing reflectivity. At the same time, the presence of anti-reflective particles not only changes the direction of the light, but also causes the light to take more paths, thus attenuating the energy of the light and further reducing the reflectivity.

In particular, the above-mentioned optical element uses anti-reflective particles with a specific particle size combination in the second film layer, which can increase the change in the direction of the light path through the gaps. Among them, 48%~52% of the first anti-reflection particles have a particle size of ≥50nm and ≤100nm. They have the widest distribution range in the second film layer. They first play the role of changing the light path. 28%~32% The second anti-reflective particles (particle diameter is ≥20nm and <50nm) and 18%~22% of the third anti-reflective particles (<20nm) can find gaps between the first anti-reflective particles and change the light again. direction of travel. When the proportions and particle sizes of the three anti-reflective particles are outside the above range, the optical properties are prone to deviation and the reflectivity cannot be effectively reduced.

In one specific example, the particle diameter of the third anti-reflective particles is ≥10 μm and <20 nm.

Further, the mass percentage of the anti-reflection particles in the second film layer is 1% to 20%. If the added amount is insufficient, it will happen that after the light is incident on the surface layer, it will not be able to hit the anti-reflective particles. Because it cannot hit the anti-reflective particles, it will not be able to change the direction of the light. Without the ability to change the direction of the light, the light will go straight and reflect, resulting in an increase in reflectivity and an inability to effectively reduce the reflectivity. If too much is added, the anti-reflective particles after stirring may still be too concentrated. Although the tiny anti-reflective particles that are too concentrated can still change the direction of the light, being too concentrated will affect the overall transmittance and will As a result, the light emitted from the bottom is blocked, resulting in reduced transmittance, and the reflectivity cannot be effectively reduced. At the same time, if too much is added, the haze of the optical components will also increase, affecting the appearance of the product. Specifically, the mass percentage of anti-reflective particles in the second film layer includes but is not limited to: 1%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 20%.

In one specific example, the mass percentage of anti-reflective particles in the second film layer is 10% to 20%.

It can be understood that the second film layer is prepared by dispersing anti-reflective particles in colloid and curing and molding, and the anti-reflective particles need to be uniformly dispersed in the colloid. In one specific example, in terms of mass percentage, the raw materials for preparing the colloid include: 20%~40% acrylic resin oligomer, 10%~20% light-curing reactive diluent, 1%~5% photoinitiator, 1.5%~8% additives and 50%~70% solvent.

Among them, without limitation, the functionality of the acrylic resin oligomer is 6 to 15, and can be selected from the group consisting of polyether polyurethane acrylate oligomer, polyester polyurethane acrylate oligomer, and polycarbonate polyurethane acrylate. Oligomers, aliphatic urethane acrylate oligomers, silicone-modified urethane acrylate oligomers, fluorine-modified urethane acrylate oligomers, epoxy-modified urethane acrylate oligomers and polyester acrylate oligomers one or more polymers.

Without limitation, the functionality of the photocurable reactive diluent is mainly 2 to 6 functional groups, and can be selected from the group consisting of pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, and trimethylolpropane triacrylate. Acrylates, ethoxylated trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, 1,6-hexanediol di(meth)acrylate, trimethylolpropane triacrylate, trisacrylate Hydroxymethylpentane trimethacrylate, trimethylolpropane pentaerythritol triacrylate, propoxylated neopentyl glycol diacrylate, ethoxylated 1,6-hexanediol diacrylate and tris(2-acrylamide) Oxyethyl) one or more isocyanurates.

Without limitation, the photoinitiator can be selected from the group consisting of 1-hydroxycyclohexylphenone (Photoinitiator 184), 2-hydroxy-2-methyl-1-phenyl-1-propanone (Photoinitiator 1173), 2, 4,6-trimethylbenzoyl-diphenylphosphine oxide (photoinitiator TPO) and 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone (photoinitiator 2959 ) one or more.

Without limitation, the additive may be selected from one or more of inorganic nanomaterials and fluorosilicon additives.

Without limitation, the solvent may be selected from one or more of ethyl acetate, butyl acetate, methyl ethyl ketone, methyl isobutyl ketone, propylene glycol methyl ether and propylene glycol methyl ether acetate.

In one specific example, the anti-reflective particles are solid structures. Among the raw materials for preparing the above-mentioned second film layer, the use of solid structure anti-reflection particles can achieve better compatibility with colloids. At the same time, the solid structure is better at destroying reflected light, and is easy to produce and obtain. It is more convenient and cheaper. It will not be deformed due to large changes in ambient temperature. It has good durability and wear resistance. Reliability (Reliability Test) refers to the performance of the product in different usage environments. , even after long-term use, the product characteristics after use can be the same as the characteristics at the beginning of use, and the performance will not become worse as the use time increases).

It can be understood that the anti-reflective particles are preferably transparent and colorless anti-reflective particles. In one specific example, the material of the anti-reflective particles is selected from one or more of silicon dioxide and titanium dioxide. Titanium dioxide and silicon dioxide have a low refractive index and are transparent, and can be effectively linked with the raw materials for preparing the second film layer during synthesis to improve the appearance of transparency and low haze. Specifically, the aforementioned refractive index ranges from 1.2 to 1.3. If it is further less than 1.2, the compatibility with the raw materials for preparing the second film layer will become worse, resulting in inability to dissolve, which will affect the transparency, light transmittance, and increase haze.

Without limitation, the preparation method of the aforementioned second film layer includes the following steps: Mix the raw materials for preparing the colloid of the second film layer to prepare a colloid solution; Add the anti-reflective particles to the colloidal solution in batches and stir to disperse.

It can be understood that the second film layer may be one layer, or may be two or more layers, such as three layers. The multiple layers may be connected through a colloid layer of the second film layer without adding anti-reflective particles, or they may be directly contacted and laminated. There may be more than one colloid layer of the second film layer without added anti-reflective particles. Specifically, it can be shown in Figures 3 to 5: Figure 3 shows that the first film layer 200, two colloid layers 301 and the second film layer 300 are sequentially stacked on the surface of the base material 100; Figure 4 shows that the first film layer 200, the two colloid layers 301 and the second film layer 300 are sequentially stacked on the surface of the base material 100. Film layer 200 and three second film layers 300; FIG. 5 shows that the first film layer 200, the second film layer 300, the colloid layer 301 and the second film layer 300 are sequentially stacked on the surface of the substrate 100.

In one specific example, the thickness of the second film layer is 0.1 μm~2 μm. The study found that if the thickness is too high, the reflectivity, wear resistance, and bending performance will decrease to varying degrees. If the film thickness is too small, the film surface will be uneven and the appearance will be poor.

In one specific example, the thickness of the first film layer is 3 μm~10 μm. The study found that if the film thickness is too small, poor adhesion may occur if the film thickness is too small.

In one specific example, in terms of mass percentage, the raw materials for preparing the first film layer include:

20%~40% acrylic resin oligomer, 10%~20% light-curing reactive diluent, 1%~5% photoinitiator, 1.5%~8% additives and 50%~70% solvent.

Among them, without limitation, the functionality of the acrylic resin oligomer is 6 to 15, and can be selected from the group consisting of polyether polyurethane acrylate oligomer, polyester polyurethane acrylate oligomer, and polycarbonate polyurethane acrylate. Oligomers, aliphatic urethane acrylate oligomers, silicone-modified urethane acrylate oligomers, fluorine-modified urethane acrylate oligomers, epoxy-modified urethane acrylate oligomers and polyester acrylate oligomers one or more polymers.

Without limitation, the functionality of the photocurable reactive diluent is mainly 2 to 6 functional groups, and can be selected from the group consisting of pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, and trimethylolpropane triacrylate. Acrylates, ethoxylated trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, 1,6-hexanediol di(meth)acrylate, trimethylolpropane triacrylate, trisacrylate Hydroxymethylpentane trimethacrylate, trimethylolpropane pentaerythritol triacrylate, propoxylated neopentyl glycol diacrylate, ethoxylated 1,6-hexanediol diacrylate and tris(2-acrylamide) Oxyethyl) one or more isocyanurates.

Without limitation, the photoinitiator can be selected from the group consisting of 1-hydroxycyclohexylphenone (Photoinitiator 184), 2-hydroxy-2-methyl-1-phenyl-1-propanone (Photoinitiator 1173), 2, 4,6-trimethylbenzoyl-diphenylphosphine oxide (photoinitiator TPO) and 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone (photoinitiator 2959 ) one or more.

Without limitation, the additive may be selected from one or more of inorganic nanomaterials and fluorosilicon additives.

Without limitation, the solvent may be selected from one or more of ethyl acetate, butyl acetate, methyl ethyl ketone, methyl isobutyl ketone, propylene glycol methyl ether and propylene glycol methyl ether acetate.

In one specific example, the refractive index of the first film layer is greater than the refractive index of the second film layer. This can avoid excessive reflection and refraction, which will interact with the second film layer and cause interference fringes, which will affect the appearance. Further, the refractive index of the first film layer is 1.465~1.505, and the refractive index of the second film layer is 1.465~1.485.

In one specific example, the material of the substrate is polyimide (CPI), polyethylene terephthalate (PET), triacetylcellulose (TAC), glass (such as ultra-thin glass UTG), Polycarbonate (PC) or polymethylmethacrylate (PMMA).

Furthermore, the above-mentioned optical element further includes a dielectric layer disposed between the base material and the first film layer, and the dyne value of the dielectric layer is ≥40. Without limitation, one of the situations where a dielectric layer needs to be added is that the surface energy of the substrate is too small. When the dyne value is less than 40 (the dyne value can be measured with a dyne pen), the first film layer will appear on the substrate. Poor adhesion causes the functional layer to be easily peeled off from the substrate. The presence of the dielectric layer can increase the surface energy of the substrate and ensure good adhesion between the first film layer and the substrate.

In one specific example, the thickness of the dielectric layer is 100nm~300nm.

In one specific example, the material of the dielectric layer is primer (such as chlorinated polypropylene, SBS resin, etc.) or Corona (Corona refers to the use of corona treatment to adhere to the hardened glue or to make the hardened glue easy to coat on the surface of the substrate. )

The present invention also provides an electronic device, including a body and an anti-reflection device embedded in the body, where the anti-reflection device is the above-mentioned optical element. Further, electronic devices may include mobile phones and monitors.

In one specific example, the anti-reflection device is a protective cover. Further, the protective cover is a screen cover.

The following are specific examples.

The glue forming the transition layer in the embodiment and the comparative example is the same, and its composition is as follows (mass percentage): JESTA DSP-552F (6-functional fluorine modified polyurethane acrylate oligomer) 15%, Changxing Chemical 6195-100 (10-functional aliphatic polyurethane acrylate oligomer) 10%, dipentaerythritol hexaacrylate 10%, Photoinitiator 2959 2%, NANOBYK-3605 (inorganic nanomaterial) 2.5%, Shin-Etsu KY-1203 (fluorosilicone additive) 1%, propylene glycol methyl ether 20% and butyl acetate 39.5%.

The manufacturing methods of the optical elements provided in Examples 1 to 5 and Comparative Examples 1 to 3 are as follows: (1) Transition layer production: Pour the glue of the transition layer on the base material PET, use a wire rod to evenly apply the glue on the base material, and harden it after UV light irradiation. The UV light irradiation energy is about 220mJ to obtain the transition layer. The layer thickness About 6μm; (2) Hard film layer production: 2.1 Mix silica solid particles according to the gradation in Table 1 (mass percentage); 2.2 Prepare the colloid according to the following formula (mass percentage): Colloid 1: Jestar DSP-552F (6-functional fluorine modified polyurethane acrylate oligomer) 15%, Changxing Chemical 6195-100 (10-functional aliphatic polyurethane acrylate oligomer) 10%, dipentaerythritol hexaacrylate 10%, photoinitiator 2959 2%, NANOBYK-3605 (inorganic nanomaterial) 2.5%, Shin-Etsu KY-1203 (fluorosilicone additive) 1%, propylene glycol methyl ether 20% and butyl acetate 39.5%. Colloid 2: Bahe New Material BW8025 (average 10-functional fluorine-modified polyurethane acrylate oligomer) 10%, Shaduomo CN9006NS (6-functional aliphatic polyurethane acrylate oligomer) 18%, trimethylolpropane trimethylol Acrylate (TMPTA) 12%, photoinitiator 2959 2.2%, NANOBYK-3605 (inorganic nanomaterial) 2.5%, Shin-Etsu KY-1203 (fluorosilicone additive) 1%, propylene glycol methyl ether 15% and butyl acetate 30.7% . Colloid 3: Changxing Chemical 6196-100 (15-functional aliphatic polyurethane acrylate oligomer) 10%, Sartosan CN9006NS (6-functional aliphatic polyurethane acrylate oligomer) 15%, pentaerythritol triacrylate 13%, light Initiator 1173 2.5%, NANOBYK-3605 (inorganic nanomaterial) 2.5%, Shin-Etsu KY-1203 (fluorosilicone additive) 1%, propylene glycol methyl ether 19% and butyl acetate 37%. 2.3 Pour the solid silica particles into the corresponding colloid in batches according to the mass percentage in Table 1 and stir evenly. The stirring speed is controlled to 180 rpm. After the addition is completed, continue stirring for 10 minutes; 2.4 Pour the mixture obtained in step 2.3 on the surface of the transition layer, use a roller to evenly apply it on the base material, control the distance between the roller and the surface of the transition layer to about 1μm~2μm, and harden it after irradiation with a UV lamp. The UV lamp irradiation energy is about 220mJ, and you get Hard film layer, film thickness is 2μm.

The manufacturing method and raw materials of the optical element provided in Comparative Example 3 are the same as those in Example 1. The main difference is that step (1) of the transition layer is not made.

Among them, the electron microscope image of the optical element produced in Example 1 is shown in Figure 6. Table 1 Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Comparative example 1 Comparative example 2 Glue for hard film layer Colloid 1 Colloid 1 Colloid 1 Colloid 1 Colloid 1 Colloid 2 Colloid 3 Colloid 1 Colloid 1 Silica addition amount 5% 7% 10% 15% 20% 7% 7% 40% 10% Silica particle size and particle size (R) distribution 10nm~100nm 10nm~100nm 10nm~100nm 10nm~100nm 10nm~100nm 10nm~100nm 10nm~100nm 10nm~100nm 50nm~200nm 50%: 50nm≤R≤100nm, 30%: 20nm≤R＜50nm, 20%: 10μm≤R＜20nm 50%: 50nm≤R≤100nm, 30%: 20nm≤R＜50nm, 20%: 10μm≤R＜20nm 50%: 50nm≤R≤100nm, 30%: 20nm≤R＜50nm, 20%: 10μm≤R＜20nm 50%: 50nm≤R≤100nm, 30%: 20nm≤R＜50nm, 20%: 10μm≤R＜20nm 50%: 50nm≤R≤100nm, 30%: 20nm≤R＜50nm, 20%: 10μm≤R＜20nm 50%: 50nm≤R≤100nm, 30%: 20nm≤R＜50nm, 20%: 10μm≤R＜20nm 50%: 50nm≤R≤100nm, 30%: 20nm≤R＜50nm, 20%: 10μm≤R＜20nm 50%: 50nm≤R≤100nm, 30%: 20nm≤R＜50nm, 20%: 10μm≤R＜20nm 50%: 150nm ≤R≤200nm, 30%: 100nm ≤R＜150nm, 20%: 10μm≤R＜100nm

The test methods for the optical elements of Examples 1 to 7 and Comparative Examples 1 to 3 are as follows: (1) Reflectance test method (spectrometer model: Konica Minolta CM-5; light source is D65, angle is 100): 1.1 Prepare two linear polarizers (Polarizer); 1.2 Glue two polarizers vertically; 1.3. Bond the test sample and crossed polarizer; 1.4. Place the test sample surface on the sensor area; 1.5. Make sure the sample being tested is flat and there are no bubbles between the adhesives; 1.6. Start measurement and confirm the measurement results. (2) Bending performance test method (Equipment model: Yuasa DML HB-FS): 2.1 Prepare test samples for folding; 2.2 The length of the sample to be tested shall not be less than 150mm; 2.3 For inward folding, the hard film layer faces upward; 2.4 Fix both sides of the test sample on the folding plate; 2.5 Set the folding frequency to once per second; 2.6 Monitor every 50,000 times until it stops at 200,000 times; 2.7 Check the appearance and compare the optical results before and after folding. (3) Transmittance/Haze: After a beam of incident light passes through the product, part of the light will go straight and part of the light will be scattered. Light at +/-3 degrees is defined as light traveling in a straight line, and light exceeding +/-3 degrees is called scattered light. The transmittance tests the ratio of straight light to incident light; the haze tests the ratio of scattered light to incident light. (4) Wear resistance: 0000# steel wool was loaded with a weight of 1kg and a heavy object was placed on the product to conduct a friction test. There were no obvious scratches after 1500 times. (5) Hardness: Tested under 750g load-bearing conditions.

The results are shown in Table 2 below: Table 2 Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Comparative example 1 Comparative example 2 Comparative example 3 Reflectivity 4.02% 3.85% 2.42% 2.53% 2.62% 3.78% 3.86% 6.12% 6.45% 4.3% Bending performance 1.5mm inward folding, 200,000 bending times OK 1.5mm inward folding, 200,000 bending times OK 1.5mm inward folding, 200,000 bending times OK 1.5mm inward folding, 200,000 bending times OK 1.5mm inward folding, 200,000 bending times OK 1.5mm inward folding, 200,000 bending times OK 1.5mm inward folding, 200,000 bending times OK 1.5mm inward folding, 200,000 bending times NG 1.5mm inward folding, 200,000 bending times NG 1.5mm inward folding, 200,000 bending times NG Wear resistance pass through pass through pass through pass through pass through pass through pass through failed pass through pass through hardness 5H 5H 5H 5H 5H 5H 5H 5H 5H 5H Haze 0.35% 0.36% 0.34% 0.35% 0.36% 0.35% 0.36% 0.86% 0.63% 0.35% Penetration rate 91.1% 90.8% 90.5% 90.5% 90.1% 91.0% 90.5% 88.3% 86.5% 90.5%

The technical features of the above-described embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, All should be considered to be within the scope of this manual.

The above-mentioned embodiments only express several implementation modes of the present invention to facilitate a specific and detailed understanding of the technical solutions of the present invention, but they should not be construed as limiting the scope of protection of the invention patent. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. It should be understood that technical solutions obtained by those skilled in the art through logical analysis, reasoning or limited testing based on the technical solutions provided by the present invention are within the protection scope of the appended claims of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the contents of the appended claims, and the description and drawings may be used to interpret the contents of the claims.

100: Substrate 200: First film layer 300: Second film layer 301: Colloidal layer N _Air : Air refractive index N ₁ : First film layer refractive index

Figure 1 is a schematic diagram of the refraction and reflection of light through a medium. Figure 2 is a schematic diagram of the refraction and reflection of light when it encounters anti-reflection particles dispersed in the second film layer. Figure 3 is a schematic structural diagram of an optical element according to an example of the present invention. Figure 4 is a schematic structural diagram of an optical element of another example of the present invention. Figure 5 is a schematic structural diagram of an optical element according to another example of the present invention. Figure 6 is an electron microscope image of an optical element according to an embodiment of the present invention.

100:Substrate

200: first film layer

300: Second film layer

301: Colloidal layer

Claims (11)

An optical component containing: A base material and a first film layer and a second film layer sequentially laminated on the surface of the base material; Wherein, the second film layer is dispersed with anti-reflective particles accounting for 1% to 20% of the mass percentage of the second film layer; In terms of mass percentage, the anti-reflective particles include 48% to 52% of the first anti-reflective particles, 28% to 32% of the second anti-reflective particles, and 18% to 22% of the third anti-reflective particles; Wherein, the particle diameter of the first anti-reflective particles is ≥50nm and ≤100nm; The particle size of the second anti-reflective particles is ≥20nm and <50nm; The particle size of the third anti-reflective particles is <20 nm. The optical element according to claim 1, wherein the mass percentage of the anti-reflection particles in the second film layer is 10%~20%. The optical element according to claim 1, wherein the second film layer is prepared by dispersing the anti-reflection particles in a colloid and solidifying it. In terms of mass percentage, the raw materials for preparing the colloid include: The optical element according to claim 1, wherein the anti-reflection particles have a solid structure. The optical element according to claim 1, wherein the material of the anti-reflection particles is selected from one or more of silicon dioxide and titanium dioxide. The optical element according to claim 1, wherein, in terms of mass percentage, the raw materials for preparing the first film layer include: 20%~40% polyacrylic resin, 10%~30% epoxy resin, 20%~40% acrylate oligomer, 5%~25% UV monomer diluent and 1%~5% Photoinitiator. The optical element according to claim 1, wherein the refractive index of the first film layer is greater than the refractive index of the second film layer. The optical element according to any one of claims 1 to 7, wherein the thickness of the second film layer is 0.1 μm ~ 2 μm; and/or The thickness of the first film layer is 3 μm~10 μm. The optical element according to any one of claims 1 to 7, wherein the material of the substrate is polyimide, polyethylene terephthalate, cellulose triacetate, glass, polycarbonate or polyethylene terephthalate. Methyl methacrylate. An electronic device characterized by: The electronic device has a body and an anti-reflection device embedded in the body. The anti-reflection device is an optical element as described in any one of claims 1 to 9. The electronic equipment according to claim 1, wherein the anti-reflection device is a protective cover.

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