An optical film device with adjustable haze and transmittance and a method for manufacturing the same

Abstract

The application relates to the technical field of optical film devices, and particularly discloses an optical film device with adjustable haze and transmittance and a preparation method thereof. The optical film device with adjustable haze and transmittance comprises a substrate, a first conductive film, a transmittance regulation layer, a haze regulation layer, a second conductive film and a protective film arranged in sequence, the thickness of the transmittance regulation layer is 83-134 microns, and the thickness of the haze regulation layer is 10-30 microns. The optical film device has the advantages that the color, the transmittance and the haze can be adjusted simultaneously.

Description

Technical Field

[0001] This application relates to the technical field of optical thin film devices, and more specifically, to an optical thin film device with adjustable haze and transmittance, and a method for fabricating the same. Background Technology

[0002] Intelligent dimming devices are widely used in construction, home furnishings, and automobiles due to their ability to provide numerous functions such as heat insulation, temperature control, energy saving, and privacy, and therefore have significant social and commercial value. The development of intelligent dimming film technology has a long history and is extremely challenging.

[0003] Currently, there are two main types of smart devices on the market based on electrochromic technology: smart glass technology based on polymer dispersed liquid crystal color-changing (PDLC) and smart glass technology based on conductive polymer electrochromic (EC).

[0004] Polymer-dispersed liquid crystal technology disperses small liquid crystal droplets within an organic solid polymer matrix. By changing the voltage, the free orientation of the liquid crystal molecules is achieved, resulting in an opaque, milky-white, or semi-transparent state.

[0005] While electrochromic technology using conductive polymers can address the minimum transmittance issue of PDLCs, its complex processing and high cost limit its application to a few devices, such as high-end sports cars and Boeing aircraft. This is because the physicochemical properties of the inorganic polarized crystal particles in conductive polymers differ significantly from those of organic polymers. According to the principle of "like dissolves like," and given the very small amount of polar inorganic particles used, it is difficult to mix them uniformly with the polymer. Even common surfactants struggle to achieve homogeneity, sometimes requiring the grafting of small organic molecules onto the surface of the inorganic polarized crystal particles before using oligomers with surfactant properties for mixing. Furthermore, current electrochromic technology can only achieve changes in a single indicator such as color change, transmittance, or haze; controlling multiple indicators simultaneously remains challenging.

[0006] Therefore, related optical thin film devices have the following problems: electrochromic technology can only achieve color change and transmittance change, and its ability to control haze is limited; polymer-dispersed liquid crystal color-changing technology can only achieve large-scale haze change, and its ability to control color change and light transmittance is limited. Summary of the Invention

[0007] In order to enable the control of color change, transmittance and haze of optical thin film devices, this application provides an optical thin film device with adjustable haze and transmittance and a method for its preparation.

[0008] In a first aspect, this application provides an optical thin-film device with adjustable haze and transmittance, employing the following technical solution:

[0009] An optical thin-film device with adjustable haze and transmittance includes a substrate, a first conductive film, a transmittance control layer, a haze control layer, a second conductive film, and a protective film arranged sequentially. The transmittance control layer has a thickness of 83-134 μm, and the haze control layer has a thickness of 10-30 μm.

[0010] By adopting the above technical solution, the transmittance control film and the haze control film are respectively sandwiched between two conductive films, and can respond to voltage separately, realizing independent and coordinated control of transmittance and haze. The transmittance control layer is a functional layer made of polarized crystal, and its transmittance can be changed over a wide range according to the voltage adjustment; the haze control layer is a functional layer made of liquid crystal, and its haze can be changed over a wide range according to the voltage adjustment.

[0011] In the power-off state, the haze control layer made of liquid crystal molecules plays a dominant role, which can further increase the haze of the optical thin film device. In the power-on state, the functional layer made of polarized crystal plays a dominant role, changing from an opaque state to a transparent state, and the transmittance changes from a low state to a high state. The functional layer made of liquid crystal molecules can also become transparent, thus enabling the three functions of the optical thin film device—haze, transmittance, and color change—to be adjusted.

[0012] The thickness of the transmittance control layer and the haze control layer has a significant impact on the performance of the final optical thin film device. When the thickness of the haze control layer is kept constant, as the thickness of the transmittance control layer gradually increases, the haze in the off state and the haze in the on state gradually increase, while the transmittance in the off state and the transmittance in the on state gradually decrease. When the thickness of the transmittance control layer is taken in the range of 80-135μm and the thickness of the haze control layer is taken in the range of 10-30μm, the optical thin film device has good dimming performance.

[0013] Preferably, the transmittance control layer comprises a functional layer prepared using an electric polarizing crystal, hexamethylphosphoric triamine, oligomers and polymers, wherein the weight ratio of the electric polarizing crystal to hexamethylphosphoric triamine is 1:(5-20); the haze control layer is a functional layer prepared using liquid crystal molecules and polymers, wherein the weight ratio between the liquid crystal molecules and polymers is 1:(1-3).

[0014] The polarization crystal used in the transmittance control layer is one or more of titanium dioxide, zinc oxide nanoparticles, perovskite, and organic-inorganic hybrid particles.

[0015] The oligomer used in the transmittance control layer is one or more of poly(n-hexyl methacrylate), poly(octyl acrylate), and poly(laurate acrylate), and the molecular weight of the oligomer is 100-5000.

[0016] The polymer used in the transmittance control layer is one or more of polybutylene succinate, polysiloxane, and polyurethane.

[0017] By adopting the above technical solution, titanium dioxide, zinc oxide nanoparticles, perovskite, and organic-inorganic hybrid materials are used as polarizing crystals. When electricity is applied, the polarizing crystal particles in the optical thin film device will align in a specific direction, making it transparent. When the power is off, the polarizing crystal particles will redistribute randomly due to Brownian motion, making it opaque and preventing light from passing through. The polarizing crystals are first dispersed in oligomers and then blended with polymers, which helps to improve the dispersion uniformity of the polarizing crystals in the film, so that the resulting transmittance control layer has a uniform light transmission effect.

[0018] Due to its unique stereostructure, hexamethylphosphoric triamine can better polarize the polarizing crystal, resulting in better compatibility between the polarizing crystal and the polymer. Furthermore, when the polymer is polybutylene succinate, polysiloxane, or polyurethane, the polybutylene succinate and polysiloxane groups contain oxygen, which can form hydrogen bonds with hexamethylphosphoric triamine, thereby improving the bonding between the polarizing crystal and the polymer.

[0019] Preferably, the polarization crystal used in the transmittance control layer is perovskite.

[0020] By adopting the above technical solution, when the polarized crystal is perovskite, because perovskite has a cubic crystal structure, it can be better compatible and combined with hexamethylphosphoric triamine, thus it can be better compatible and combined with polymers.

[0021] Preferably, the polymer used in the transmittance control layer is one or more of polybutylene succinate and polysiloxane.

[0022] By adopting the above technical solution, both polybutylene succinate and polysiloxane have symmetrical structures that enable the polarized crystals to be arranged in an orderly manner in the transmittance control layer, thereby improving the uniformity of the transmittance control layer.

[0023] Preferably, the weight ratio of the polarized crystal to the oligomer is 1:(5-30).

[0024] By adopting the above technical solution, the addition of oligomers helps to make the polarization crystal and the polymer have good compatibility. When the weight ratio of polarization crystal to oligomer is in the range of 1:(5-30), the prepared transmittance control layer has good adhesion.

[0025] Secondly, this application provides a method for fabricating an optical thin-film device with adjustable haze and transmittance, employing the following technical solution:

[0026] A method for fabricating an optical thin-film device with adjustable haze and transmittance includes the following steps:

[0027] S1. First, the polarizing crystal is dispersed in hexamethylphosphoric triamine, and then oligomer and polymer solution are added and mixed. After mixing, it is coated on the first conductive film, dried and cured to obtain the transmittance control layer.

[0028] S2. The liquid crystal and polymer solution are blended, coated on the transmittance control layer, dried and cured to obtain the haze control layer.

[0029] S3. Place the protective film coated with the second conductive film on the haze control layer and flatten it to obtain an optical thin film device with adjustable transmittance and haze.

[0030] By adopting the above technical solution, the polarization crystal is first dispersed in hexamethylphosphoric triamine, and then oligomers and polymers are added to form a transmittance control layer with good bonding strength and uniformity. The haze control layer and the transmittance control layer have good bonding strength, ensuring the service life of the optical thin film device.

[0031] Preferably, in step S1, the polarized crystal is dispersed in hexamethylphosphoric triamine in three or more fractions.

[0032] By adopting the above technical solution, the polarization crystal is dispersed in hexamethylphosphoric triamine in three or more parts, which can ensure that the polarization crystal is fully mixed.

[0033] In summary, this application has the following beneficial effects:

[0034] 1. The optical thin film device of this application can simultaneously achieve changes in several aspects such as color change, transmittance or haze, overcoming the limitations of existing optical thin film devices in controlling color change, transmittance or haze.

[0035] 2. The optical thin-film device of this application can simultaneously achieve multiple functions such as heat insulation, dimming, and privacy, and has a wide range of applications, taking into account both indoor and outdoor applications.

[0036] 3. The method of this application adopts a solution processing method, which is simple to operate and can easily achieve large-area rapid processing. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of an optical thin-film device.

[0038] Figure 2 The light transmittance of the optical thin film device prepared in Example 6 is in the off state and the on state. Detailed Implementation

[0039] Raw material sources and details:

[0040] The organic-inorganic hybrid particles were prepared by the method specified in Chinese Patent No. CN 111718450 B. The preparation of the organic-inorganic polarized particles was as follows: Dye molecule B (50.0 mg) and hydroxypropyl acrylate (203.0 mg) were added to a zinc oxide nanorod solution (50.0 mL, 3.0 mg / mL, ethylene glycol methyl ether solution), and aeration was carried out for 15 min. Then, 2.3 mg of AIBN (dissolved in 1 mL of tetrahydrofuran) was added, and the reaction was carried out at 75 °C for 4.5 h. The temperature was further increased to 85 °C, and the reaction was carried out for 1 h. The reaction solution was concentrated to 10 mL, and 100 mL of n-hexane was added, precipitating a green powder solid. The solid was washed twice with n-hexane and then once with ethanol. The obtained solid was dried under nitrogen to obtain the organic-inorganic polarized particles.

[0041] The structural formula of dye molecule B is: Octyl polyacrylate (self-made, Mn ~ 3990) 1H-NMR (300MHz, CDCl3, δ) 4.2-3.9 (3H), 2.5-2.2 (4H), 0.8-1.4 (15H) GPC;

[0042] Polyethylene-propylene copolymer (Zhengzhou Alpha Chemical Co., Ltd., Mn ~ 42,000, Mw ~ 175,000);

[0043] Polyethylene glycol diacrylate (Tanshtech, Mw-600);

[0044] Photoinitiator 754 is phenylacetic acid-oxy-2,1-ethylenediester;

[0045] Polyacrylate lauryl ester Mn ~ 8,000 1H-NMR (300MHz, CDCl3, δ) 4.2-3.9 (3H), 2.5-2.2 (4H), 0.8-1.4 (23H);

[0046] Polysiloxane: CAS: 63148-62-9; Molecular formula: C8H 24 O2Si3; Molecular weight: 74.15394;

[0047] Polyurethane: CAS: 51852-81-4; Molecular formula: C 16 H 22 N2O5; Molecular weight: 322.35628;

[0048] Polybutylene succinate CAS: 25777-14-4; Molecular formula: C8H 16 O6; Molecular weight: 208.21;

[0049] Hexamethylphosphoryltriamine: Molecular formula: C6H18 N3OP; Molecular weight: 179.20; CAS number: 680-31-9;

[0050] The polarized crystals in this application are all nanoscale particles;

[0051] The protective film is a PE film;

[0052] Both the first conductive film and the second conductive film are ITO films;

[0053] The substrate is a PET film.

[0054] Example

[0055] Examples 1.1-1.8

[0056] An optical thin-film device with adjustable haze and transmittance includes the following steps:

[0057] S1. Weigh 10g of zinc oxide and 100g of hexamethylphosphoric triamine, and weigh 150g of polyoctyl acrylate and 10g of polybutylene succinate according to a 1:10 mass ratio. First, add the perovskite to the hexamethylphosphoric triamine in three or more portions and mix thoroughly. Then, add the polyoctyl acrylate and polyethylene-propylene copolymer, and add 50mL of tetrahydrofuran. Stir thoroughly, and then reflux at 85℃ for 20 minutes to prepare a homogeneous solution. Coat the prepared solution onto an ITO film placed on a doctor blade coater, controlling the wet film thickness at 360-800μm. After drying, a transmittance control layer with a thickness of 83-134μm is obtained.

[0058] S2. Dissolve 2.0g of E7 liquid crystal in 5mL of ethyl acetate solution, add 3.5g of polyethylene glycol diacrylate and 0.01g of photoinitiator 754 to prepare a homogeneous solution. Coat the prepared solution onto the transmittance control layer, control the wet film thickness to be 150-300μm, and after drying, obtain a haze control layer with a thickness of 10-30μm.

[0059] S3. Place the protective film coated with ITO film on the haze control layer in S2, flatten it, and remove the air to obtain an optical thin film device.

[0060] The thicknesses of the transmittance control layer and haze control layer in Examples 1.1-1.8 are shown in the table below.

[0061] Table 1. Thickness of the transmittance control layer and haze control layer in Examples 1.1-1.8

[0062]

[0063] The performance of the optical thin film devices in Examples 1.1-1.8 was tested.

[0064] The tests include:

[0065] 1. The difference in light transmittance and haze between the powered-on and powered-off states of an optical thin-film device reflects its optical control quality. Transmittance was measured using an LS183 spectrometer, with a measurement range of 380 nm to 760 nm. Haze was tested using a TH-100 transmittance-haze meter (Hangzhou Caipu Technology Co., Ltd.). An AC power supply with a frequency of 50 Hz and an adjustable voltage range of 0-300 V was applied during the powered-on state; the results are shown in Table 2. The light transmittance diagrams of the thin film prepared in Example 6 in the powered-off and powered-on states are shown below. Figure 2 As shown.

[0066] The optical thin film devices of Examples 1-8 were subjected to light control quality tests, and the test results are shown in Table 1.

[0067] Table 2 Comparison and evaluation results of the light control quality of optical thin film devices in Examples 1-8

[0068]

[0069] As shown in Examples 1.1-1.8 and Table 2, the thickness and materials used in the transmittance control layer and haze control layer have a significant impact on the performance of the final optical thin-film device. Examples 1.1-1.3 show that when the thickness of the transmittance control layer increases, the haze in the off state increases from 82% to 88%, while the transmittance in the off state decreases from 4.1% to 0.8%, indicating that a thicker transmittance control layer can improve the dimming performance in the off state. In the on state, haze also increases, but transmittance decreases significantly. In Examples 1.4-1.6, using a blue transmittance control layer can achieve a light modulation effect from blue haze to colorless transparency. Furthermore, by fine-tuning the transmittance control layer and haze control layer, changes in color, transmittance, and haze can be achieved, enabling different functions for different application scenarios. In Example 1.6, when the optimized thicknesses of the transmittance control layer and the haze control layer are 85 μm and 25 μm, respectively, the transmittance range can be increased from 4.8% to 61%, and the haze can be decreased from 90% to 7.9%. Furthermore, as shown in Example 1.8, even with a wider range of adjustment of the thicknesses of the transmittance control layer and the haze control layer, good dimming performance can still be achieved.

[0070] Example 2

[0071] A method for preparing an optical thin film device is based on Example 1.6, except that an equal amount of polysiloxane is used to replace polybutylene succinate, while the remaining steps are the same as in Example 1.6.

[0072] Example 3

[0073] A method for preparing an optical thin film device is based on Example 1.6, except that an equal amount of polyurethane is used to replace polybutylene succinate, while the remaining steps are the same as in Example 1.6.

[0074] Example 4

[0075] A method for fabricating an optical thin-film device, based on Example 1.6, differs in that an equal amount of dimethyl silicone oil is used instead of hexamethylphosphoric triamine.

[0076] Example 5

[0077] A method for fabricating an optical thin-film device, based on Example 1.6, differs in that an equal amount of perovskite is used to replace zinc oxide nanoparticles.

[0078] Example 6

[0079] A method for fabricating an optical thin-film device, based on Example 1.6, differs in that an equal amount of titanium dioxide is used to replace zinc oxide nanoparticles.

[0080] Example 7

[0081] An optical thin-film device with adjustable haze and transmittance, based on Example 1.6, differs in that it includes the following steps:

[0082] S1. Weigh 10g of organic-inorganic hybrid particles, 150g of polyoctyl acrylate, and 10g of polybutylene succinate. Add the organic-inorganic hybrid particles directly to the polyoctyl acrylate and polyethylene-propylene copolymer and mix thoroughly. Then add 50mL of tetrahydrofuran and stir thoroughly. Reflux at 85℃ for 20min to prepare a homogeneous solution. Coat the prepared solution onto an ITO film placed on a doctor blade coater, controlling the wet film thickness at 360μm. After drying, a transmittance control layer with a thickness of 83μm is obtained.

[0083] S2. Dissolve 2.0g of E7 liquid crystal in 5mL of ethyl acetate solution, add 3.5g of polyethylene glycol diacrylate and 0.01g of photoinitiator 754 to prepare a homogeneous solution. Coat the prepared solution onto the transmittance control layer, control the wet film thickness to 300μm, and after drying, obtain a haze control layer with a thickness of 25μm.

[0084] S3. Place the protective film coated with ITO film on the haze control layer in S2, flatten it, and remove the air to obtain an optical thin film device.

[0085] Examples 8.1-8.2

[0086] A method for preparing an optical thin film device, based on Example 1.6, differs in that, in S1, zinc oxide nanoparticles are first added to hexamethylphosphoric triamine in one go or in two parts and mixed, then polyoctyl acrylate and polyethylene-propylene copolymer are added, 50 mL of tetrahydrofuran is added, the mixture is stirred thoroughly, and then refluxed at 85°C for 20 min to prepare a homogeneous solution.

[0087] During the blending process of zinc oxide nanoparticles and hexamethylphosphoric triamine, it was found that zinc oxide could not be uniformly blended with hexamethylphosphoric triamine whether it was added all at once or in two separate additions.

[0088] Examples 9.1-9.4

[0089] An optical thin-film device, based on Example 1.6, differs in that the weight ratio of the polarizing crystal to hexamethylphosphoric triamine is different.

[0090] The dosages for Examples 9.1-9.4 are shown in the table below.

[0091] Table 3. Dosage ratios for Examples 9.1-9.4

[0092]

[0093] Examples 10.1-10.4

[0094] An optical thin-film device, based on Example 1.6, differs in that the weight ratio of the polarizing crystal to the oligomer is different.

[0095] The weights of Examples 10.1-10.4 are shown in the table below.

[0096] Table 4. Dosage ratios for Examples 10.1-10.4

[0097] Mass ratio of polarized crystal to oligomer Electrode crystal dosage / g oligomers / g Example 10.1 1：5 10 50 Example 10.2 1:30 10 300 Example 10.3 1:2 10 20 Example 10.4 1:40 10 400

[0098] Examples 11.1-11.4

[0099] An optical thin-film device, based on Example 1.6, differs in that the weight ratio between liquid crystal molecules and polymer is different.

[0100] The weights of Examples 11.1-11.4 are shown in the table below.

[0101] Table 5. Dosage ratios for Examples 11.1-11.4

[0102] The weight ratio between liquid crystal molecules and polymers Crystal molecule dosage / g Polymer dosage / g Example 11.1 1:1 2 2 Example 11.2 1:3 2 6 Example 11.3 1:0.5 2 1 Example 11.4 1:4 2 8

[0103] Comparative Example 1

[0104] An optical thin-film device, based on Example 1.6, except that an equal amount of polyethylene is used instead of polybutylene succinate.

[0105] Comparative Example 2

[0106] An optical thin-film device, based on Example 1.6, differs in that an equal amount of organic-inorganic hybrid particles are used to replace zinc oxide nanoparticles, and an equal amount of dimethyl silicone oil is used to replace hexamethylphosphoric triamine.

[0107] The bonding strength of the optical thin film devices prepared in Examples 1.6, 2-7, 9.1-9.4, 10.1-10.4, 11.1-11.4, and Comparative Examples 1-2 was tested.

[0108] The tests include:

[0109] 2. Binding test

[0110] The bonding degree of the optical thin film devices of Examples 1.6, 2-7, 9.1-9.4, 10.1-10.4, 11.1-11.4, and Comparative Examples 1-2 was tested. Taking the change rate of open-state transmittance as an example, the initial light control performance of the optical thin film devices of Examples 1.6, 2-7, 9.1-9.4, 10.1-10.4, 11.1-11.4, and Comparative Examples 1-2 was tested, and their light control performance was tested after 50 bends. The bonding degree was represented by the change of open-state transmittance after 50 bends. The smaller the change rate, the stronger the bonding degree of the optical thin film device. The test results are shown in Table 6.

[0111] Table 6. Test results of the optical thin-film devices in Examples 1.6, 2-7, 9.1-9.4, 10.1-10.4, 11.1-11.4, and Comparative Examples 1-2.

[0112] Change in open transmittance after 50 bends / % Example 1.6 8 Example 2 8.9 Example 3 9.2 Example 4 9.2 Example 5 7 Example 6 8.1 Example 7 8 Example 9.1 8.2 Example 9.2 8.1 Example 9.3 9.1 Example 9.4 9 Example 10.1 8.9 Example 10.2 8.5 Example 10.3 9.8 Example 10.4 9.7 Example 11.1 8.8 Example 11.2 8.9 Example 11.3 9.3 Example 11.4 9.4 Comparative Example 1 10.2 Comparative Example 2 10.1

[0113] Based on Examples 1.6 and 2-3, Comparative Example 1, and Table 6, it can be seen that Example 1.6 is superior to Example 2-3, and Examples 1.6 and 2-3 are both superior to Comparative Example 1. The use of polybutylene succinate, which has carbonyl groups, not only makes the polarized crystal easier to polarize, but its symmetrical structure also allows the polarized crystal to be arranged uniformly, thereby improving the uniformity of the transmittance control layer. Furthermore, polybutylene succinate, polysiloxane, and polyurethane all contain oxygen and nitrogen, making them locally polar polymers, which makes it easier for hydrogen bonds to form between the polarized crystal and the polymer, thus improving their bonding degree.

[0114] Based on Examples 1.6 and 4, Comparative Example 2, and Table 6, it is evident that Example 1.6 is superior to Example 4. This indicates that the hexamethylphosphoric triamine used in this application possesses a unique stereostructure, which, when mixed with the polarizing crystal, improves the compatibility between the polarizing crystal and the polymer. Dimethyl silicone oil is also a commonly used surfactant; however, when preparing the transmittance control layer, the stirring time required for uniformly dispersing the polarizing crystal (excluding organic-inorganic hybrids) in dimethyl silicone oil in three stages is significantly longer than that for hexamethylphosphoric triamine. When the weight ratio of the polarizing crystal relative to dimethyl silicone oil is high, uniform dispersion may even be impossible. This, in turn, improves the bonding strength of the transmittance control layer. Compared to Example 1.6, Comparative Example 2 uses organic-inorganic hybrid particles that are miscible with dimethyl silicone oil. This is much easier than the miscibility of non-organic polarized crystals with dimethyl silicone oil. This indicates that the polarized crystals are not only designed to introduce color-changing groups, but also significantly enhance the compatibility of the polarized crystals with oligomers and polymers. Furthermore, it shows that the hexamethylphosphoric triamine used in this application has a significantly better effect on the miscibility of the polarized crystals with oligomers and polymers than dimethyl silicone oil.

[0115] Based on Examples 1.6 and 5-6 and Table 6, it can be seen that Example 5 is superior to Examples 1.6 and 6. This indicates that when perovskite is used as the polarizing crystal, its cubic crystal form allows it to mix better with hexamethylphosphoric triamine and has good binding with the polymer.

[0116] As can be seen from Examples 1.6 and 7 and Table 6, the optical thin film devices prepared in Examples 1.6 and 7 have similar performance. This indicates that the present application can achieve good bonding with the polymer by directly mixing hexamethylphosphoric triamine with the polarizing crystal, without the need for organic treatment on the inorganic polarizing crystal particles to ensure the optical performance and bonding degree of the optical thin film device.

[0117] Based on Examples 1.6 and 9.1-9.4 and Table 6, it can be seen that Example 1.6 is superior to Examples 9.1-9.4, and Examples 9.1-9.2 are all superior to Examples 9.3-9.4. This indicates that when the weight ratio of the polarizing crystal to hexamethylphosphoric triamine in this application is in the range of 1:(5-20), it has better dispersibility, improves the uniformity of optical thin film devices, and ensures good bonding between the polarizing crystal and the polymer.

[0118] Based on Examples 1.6 and 10.1-10.4 and Table 6, it can be seen that Examples 1.6 are superior to Examples 10.1-10.4, and Examples 10.1-10.2 are superior to Examples 10.3-10.4. This indicates that when the weight ratio of the polarizing crystal to the oligomer is in the range of 1:(5-30) in this application, the optical thin film device has better bonding.

[0119] Combining Examples 1.6 and 11.1-11.4 with Table 6, it can be seen that Examples 1.6 are all superior to Examples 11.1-11.4, and Examples 11.1-11.2 are superior to Examples 11.3-11.4. This indicates that in this application, when the weight ratio of liquid crystal to polymer is in the range of 1:(1-3), the optical thin film device made has better bonding and optical performance.

[0120] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. An optical film device having adjustable haze and transmittance, comprising, in order, a substrate, a first conductive film, a transmittance-controlling layer, a haze-controlling layer, a second conductive film, and a protective film, characterized in that, The thickness of the transmittance regulating layer is 83-134 μm, and the thickness of the haze regulating layer is 10-30 μm. The transmittance regulating layer comprises a functional layer prepared from an electrophoretic crystal, hexamethylphosphoramide, an oligomer and a polymer, the weight ratio of the electrophoretic crystal and the hexamethylphosphoramide is 1: (5-20), the weight ratio of the electrophoretic crystal and the oligomer is 1: (5-30), and the haze regulating layer is a functional layer prepared from liquid crystal molecules and a polymer, the weight ratio of the liquid crystal molecules and the polymer is 1: (1-3); The electrophoretic crystal used in the transmittance regulating layer is one or more of titanium dioxide, zinc oxide nanoparticles, perovskite and organic-inorganic hybrid particles. The oligomer used in the transmittance regulating layer is one or more of poly (n-hexyl methacrylate), poly (octyl acrylate) and poly (lauryl acrylate), and the molecular weight of the oligomer is 100-5000. The polymer used in the transmittance regulating layer is one or more of polybutylene succinate, polysiloxane and polyurethane.

2. The optical thin film device of claim 1, wherein: The electrophoretic crystal used in the transmittance regulating layer is perovskite.

3. The optical thin film device of claim 1, wherein: The polymer used in the transmittance regulating layer is one or more of polybutylene succinate and polysiloxane.

4. The optical thin film device of claim 1, wherein: The polymer in the haze regulating layer is polyethylene glycol diacrylate.

5. A method for producing the optical thin film device having adjustable haze and transmittance according to any one of claims 1 to 4, characterized by: The method comprises the following steps: S1, first disperse the electrophoretic crystal in hexamethylphosphoramide, add an oligomer and a polymer solution to mix, coat on the first conductive film after mixing, dry and solidify to obtain a transmittance regulating layer; S2, blend liquid crystal and a polymer solution, coat on the transmittance regulating layer, dry and solidify to obtain a haze regulating layer; S3, place the protective film plated with the second conductive film on the haze regulating layer, flatten to obtain an optical thin film device with adjustable transmittance and haze.

6. The method for fabricating an optical thin-film device with adjustable haze and transmittance according to claim 5, characterized in that: In S1, the electrophoretic crystal is dispersed in hexamethylphosphoramide for three or more times.

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