Optical atomization film, method for preparing optical atomization film and display module

Abstract

This application discloses a light-diffusing film, a method for preparing the light-diffusing film, and a display module to solve the problem of flickering caused by the microlens effect amplifying changes in brightness of the display screen in existing anti-glare layers. The light-diffusing film includes a substrate layer, a light-diffusing anti-polarization film layer, and an anti-glare film. The light-diffusing anti-polarization film layer is formed by photo-initiated polymerization of a polymeric composition, wherein the polymeric composition includes at least two prepolymers containing polymerizable groups, and at least one prepolymer component (A) possessing birefringence anisotropy is included. The light-diffusing anti-polarization film layer forms at least two regions with different refractive indices on the substrate layer, and the birefringence anisotropy prepolymer component (A) is randomly oriented in the axial angular direction within the different regions of the light-diffusing anti-polarization film layer.

Description

Technical Field

[0001] This application relates to the field of organic light-emitting display technology, and in particular to a photo-atomizing film, a method for preparing the photo-atomizing film, and a display module. Background Technology

[0002] With the continuous development of display technology, display devices such as Organic Light-Emitting Diode (OLED) and Liquid Crystal Display (LCD) have been widely used in smartphones, tablets, and automotive displays. To meet the demands of use in bright outdoor environments, existing solutions typically require an anti-glare (AG) layer on the viewing side of the display device. This anti-glare layer uses its surface microstructures to scatter incident light, effectively suppressing specular reflections on the display surface and improving visual comfort.

[0003] However, because the bright areas of the pixels and the dark areas of the black matrix (BM) of the display screen itself form a small-sized (tens of μm) alternating pattern of light and dark, the uneven anti-glare structure distributed on the surface of the anti-glare layer will produce a microlens effect. This effect can amplify the light and dark variation pattern within the above-mentioned small-sized range, making the tiny light and dark differences that are originally difficult to distinguish with the naked eye become clearly visible, thus causing the "flickering" problem on the display screen and seriously affecting the display quality.

[0004] Therefore, how to effectively suppress the flash point problem caused by the presence of the anti-glare layer has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] This application provides a light-affecting film to solve the problem of flashing caused by the microlens effect amplifying changes in brightness of the display screen in existing anti-glare layers.

[0006] The embodiments of this application adopt the following technical solutions: A light-affecting film, characterized in that it comprises a substrate layer, a light-affecting antipolarization film layer, and an anti-glare film; The optically atomized depolarization film is formed by photo-initiated polymerization of a polymerizable composition, wherein the polymerizable composition includes at least two prepolymers containing polymerizable groups, wherein at least one prepolymer component (A) has birefringence anisotropy. The optically atomized unpolarization film layer forms at least two regions with different refractive indices on the substrate layer. In the different regions of the optically atomized unpolarization film layer, the axial angular direction of the birefringent anisotropic prepolymer component (A) is randomly oriented.

[0007] Preferably, the birefringent anisotropic prepolymer is present in the polymeric composition at a mass ratio of 3% to 95%.

[0008] Preferably, the birefringent anisotropic prepolymer component (A) contains polymerizable groups, which are selected from one or more of acrylate groups, methacrylate groups, epoxy groups, oxetyl groups, vinyl groups, and vinyl ether groups.

[0009] Preferably, the thickness of the optically atomized unpolarization film layer is 0.1 μm to 10 μm, and the haze is 40% to 99%.

[0010] Preferably, the refractive index difference of the birefringent anisotropic prepolymer component (A) is 0.01~0.5.

[0011] Preferably, the anti-glare film is disposed on the side of the light-dampening depolarization film layer opposite to the substrate layer, or on the side of the substrate layer opposite to the light-dampening depolarization film layer.

[0012] Preferably, the thickness of the anti-glare film is ≤50μm and the haze is ≥40%.

[0013] This application also provides a method for preparing the above-mentioned photo-atomizing film, including: A polymerizable composition is coated onto a substrate layer, the polymerizable composition comprising at least two prepolymers containing polymerizable groups, wherein at least one prepolymer component (A) possessing birefringence anisotropy is included; the substrate layer coated with the polymerizable composition is placed in a dry environment to evaporate the solvent, thereby obtaining a hazy antipolarization film coating; the hazy antipolarization film coating is cured so that the birefringence anisotropy prepolymer component (A) is randomly oriented in the axial angular direction in different regions of the hazy antipolarization film layer, forming regions with at least two different refractive indices, thereby obtaining a composite of the hazy antipolarization film and the substrate layer; an anti-glare film is disposed on the composite to obtain the hazy film.

[0014] Preferably, an anti-glare film is provided on the side of the cured light-dampening depolarization film layer opposite to the substrate layer; or an anti-glare film is provided on the side of the substrate layer opposite to the light-dampening depolarization film layer.

[0015] This application also provides a display module, including the aforementioned photo-atomizing film.

[0016] The above-described technical solutions adopted in the embodiments of this application can achieve the following beneficial effects: The optical atomizing film provided by this invention includes a substrate layer, an optical atomizing antipolarization film layer, and an anti-glare film. The optical atomizing antipolarization film layer is formed by photo-initiated polymerization of a polymeric composition containing birefringent anisotropic prepolymers. This film layer forms at least two regions with different refractive indices on the surface of the substrate layer, and the axial angular directions of the birefringent anisotropic prepolymers are randomly oriented in different regions. This structure gives the optical atomizing antipolarization film layer high haze characteristics. When light emitted from the display panel passes through this film layer, the light is fully scattered and homogenized. The originally sharp directional light is dispersed and blurred, thereby making the intensity distribution of the emitted light in all directions of space tend to be uniform. When the above-mentioned optical atomizing film is used in conjunction with the anti-glare film, the homogenized light incident on the anti-glare film can effectively avoid the uneven microstructure and pixel brightness alternating patterns on the surface of the anti-glare film. The microlens magnification effect produced by the interaction significantly suppresses or completely eliminates the "flickering" phenomenon, improving display quality. At the same time, since birefringent materials have different refractive indices for polarized light with different vibration directions, when linearly polarized light is incident on this film, the light undergoes phase delay in different directions in different regions. Under the effect of random orientation distribution, the incident single-direction polarized light is gradually converted into unpolarized light, i.e., natural light, which exists in all polarization directions. This significantly reduces the degree of linear polarization of the outgoing light. When this light-atomizing film is placed on the light-emitting side of the polarizer of the display device, the uniform light incident on the anti-glare film can effectively eliminate the problem of brightness difference and contrast reduction caused by uneven distribution of polarized light at different viewing angles. This ensures that the display screen still has uniform brightness and color performance at oblique viewing angles, thereby greatly improving the visual experience. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the specific structure of a photo-atomizing film provided in an embodiment of this application; Figure 2 This is a schematic diagram illustrating the specific structure of an optical atomization film applied to an optical display module, as provided in an embodiment of this application. Figure 3 This is a schematic diagram illustrating the specific structure of an optical atomization film applied to an optical display module, as provided in an embodiment of this application. Figure 4 A schematic diagram illustrating the specific structure of an OLED display module in COE mode, provided in an embodiment of this application; Figure 5 A schematic diagram illustrating the specific structure of an optical atomization film applied to an OLED display module in another COE mode, as provided in an embodiment of this application. Figure 6 A schematic diagram illustrating the specific structure of a photo-atomizing film applied to a conventional OLED or LCD display module, as provided in this application embodiment; Figure 7 This is a schematic diagram illustrating the specific structure of a photo-atomizing film provided in this application embodiment, applied to another conventional mode of OLED or LCD display module. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] The technical solutions provided by the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0020] This application provides a light-affecting film to solve the problem of flashing caused by the microlens effect amplifying changes in brightness of the display screen in existing anti-glare layers.

[0021] A schematic diagram of the specific structure of a photo-atomizing film provided in this application is shown below. Figure 1 As shown, it mainly includes a substrate layer 1, a light-dampening depolarization film layer 2, and an anti-glare film 3, wherein the light-dampening depolarization film layer is formed by photo-initiated polymerization of a polymeric composition.

[0022] In one embodiment, the specific preparation method of the above-mentioned photo-atomizing film may include the following steps: Step 11: Coat the polymeric composition onto the substrate layer; The polymerizable composition includes at least two prepolymers containing polymerizable groups, wherein at least one prepolymer component (A) is birefringent and anisotropic.

[0023] In one embodiment, the birefringent anisotropic prepolymer component (A) in the polymeric composition is at a mass ratio of 3% to 95%, wherein the mass ratio is determined by the total amount of solids after removing the solvent.

[0024] It should be noted that before coating, surface treatment methods such as plasma discharge or corona discharge can be used to treat the substrate layer to clean the surface and increase the surface energy.

[0025] In one embodiment, the polymeric composition can be applied to the substrate layer using a slit die or a micro-grooving die.

[0026] Step 12: Place the substrate layer coated with the polymeric composition in a dry environment to evaporate the solvent and obtain a light-dampening antipolarization film coating. In one embodiment, the coated polymeric composition can be dried in a drying oven to evaporate the solvent, thereby obtaining a light-dampening antipolarization film coating.

[0027] Step 13: Curing the optically atomized unpolarization film coating so that the birefringent anisotropic prepolymer component (A) is randomly oriented in the axial angular direction in different regions of the optically atomized unpolarization film layer, and forming regions with at least two different refractive indices, thereby obtaining the optically atomized film.

[0028] In the embodiments of this application, photoinitiated polymerization can be carried out by ultraviolet light curing. After ultraviolet light curing, a photo-fogging unpolarization film layer can be obtained. Since the different prepolymer compositions in the polymerizable composition have poor compatibility, the different prepolymer compositions will spontaneously separate phases and form regions with different refractive indices during the film formation process. The photo-fogging unpolarization film layer has at least two regions with different refractive index differences in the plane along the surface of the layer. In different regions of the photo-fogging unpolarization film layer, the axial angular direction of the birefringent anisotropic prepolymer component (A) is randomly oriented.

[0029] In one embodiment, an anti-glare film may be provided on the side of the cured light-dampening depolarization film layer opposite to the substrate layer; or an anti-glare film may be provided on the side of the substrate layer opposite to the light-dampening depolarization film layer.

[0030] In this embodiment, the anti-glare film may be composed of a mixture of anti-glare particles and a hardened resin. Specifically, the surface of the anti-glare particles has active groups that can interact with the surface of the light-dampening depolarization film layer and the substrate layer; the surfaces of the substrate layer and the light-dampening depolarization film layer have active groups that can interact with the anti-glare particles, either naturally or after pretreatment.

[0031] In the embodiments of this application, the curing resin mixture mainly comprises 10-60 parts of acrylate resin with a functionality of 2-15 (which may include, but is not limited to, polyurethane-modified acrylate or acrylate monomers), 0.5-3 parts of photoinitiator, 40-80 parts of solvent, and 0.1-1 parts of other additives.

[0032] In one embodiment, anti-glare particles and a mixture of curing resin can be sequentially attached to the surface of a substrate layer or a light-dampening depolarization film layer, then dried, and further cross-linked by ultraviolet light to form an anti-glare coating. Specifically, anti-glare particles can first be directly deposited in a single layer on the surface of a substrate layer or a light-dampening depolarization film layer. After drying and a fixing reaction, the anti-glare particles are fixedly attached to the substrate layer or the light-dampening depolarization film layer. Then, a mixture of curing resin is applied to the substrate layer or the light-dampening depolarization film layer that already contains a single layer of anti-glare particles. After drying the solvent in an oven, it is cured and cross-linked by ultraviolet light to obtain the anti-glare film.

[0033] In one embodiment, the polymerizable group in the polymerizable composition may be selected from one or more of acrylate, methacrylate, epoxy, oxetyl, vinyl, and vinyl ether groups, and the polymerizable group may have the structure shown in formulas (1) to (6) below:

[0034] Equation (1)

[0035] Equation (2)

[0036] Equation (3)

[0037] Equation (4)

[0038] Equation (5)

[0039] Equation (6) In one embodiment, the types of materials possessing birefringent anisotropy may include, but are not limited to, the following: Cellulose resins, compounds with mesocrystalline properties, azobenzene compounds, and engineering plastics such as polycarbonate, polymethyl methacrylate, and polystyrene.

[0040] In the embodiments of this application, the following materials can be used as the prepolymer component (A) with birefringence and anisotropy, specifically including: A-1: UA-5137 isocyanate ethyl acrylate modified cellulose resin, purchased from Eastman Company; A-2: Acrylate-modified cellulose resin UA-5140, purchased from Eastman Company; A-3: The structural formula is as follows, purchased from Sigma-Aldrich:

[0041] A-4: The structural formula is as follows, purchased from Jiangsu Hecheng Display Co., Ltd.:

[0042] A-5: The structural formula is as follows, purchased from Jiangsu Hecheng Display Co., Ltd.:

[0043] A-6: The structural formula is as follows, purchased from Shanghai Yuanye Biotechnology Co., Ltd.:

[0044] A-7: The structural formula is as follows, purchased from Jiangsu Hecheng Display Co., Ltd.:

[0045] A-8: The structural formula is as follows, purchased from TCI (Shanghai) Chemical Trading Co., Ltd.:

[0046] A-9: The structural formula is as follows, purchased from Xi'an Qiyue Biotechnology Co., Ltd.:

[0047] In one embodiment, the polymerizable composition may contain other auxiliary components in addition to the prepolymer containing polymerizable groups. For example, the polymerizable composition may also include at least one of a diluent, a photoinitiator, a solvent, a leveling and defoaming agent, a silane coupling agent, or an amine resin.

[0048] It should be noted that conventional diluents, photoinitiators, solvents, leveling and defoaming agents, silane coupling agents or amine resins can all be used in this invention.

[0049] To reduce viscosity, a diluent can be added to the polymerizable composition, wherein the diluent may be composed of a polymerizable resin group. In a preferred embodiment, 1,6-hexanediol diacrylate (HDDA), isobornyl acrylate (IBOA), dipropylene glycol diacrylate (DPGDA), etc., can be used as diluents.

[0050] To form a crosslinked network through photoinitiated polymerization, a photoinitiator can be added to the polymerizable composition. In a preferred embodiment, photoinitiators such as benzophenones, acetophenones, benzoyl ketals, and onium salts can be used. Furthermore, some branded initiators such as "BASF OXE-01" and "OXE-02" can also be added to the polymerizable composition as photoinitiators.

[0051] In addition to using one photoinitiator, two or more photoinitiators can also be used simultaneously. In one embodiment, the photoinitiator accounts for 0.1% to 10% by mass of the total mass of the polymerizable composition; preferably, it can be 0.5% to 7% by mass; more preferably, it can be 1% to 5% by mass.

[0052] In actual coating production processes, other additives can be added as needed to ensure solution leveling, photocrosslinking efficiency, etc. For example, additives suitable for the polymerizable compositions of the present invention may include one or more combinations of leveling and defoaming agents and chain transfer agents.

[0053] In a preferred embodiment, the leveling and defoaming agent may be at least one of the following: BYK-300, BYK-306, BYK-358, BYK-354, BYK-361N, BYK-515, BYK-3560, and BYK-3566 from BYK Corporation; at least one of the following: MEGAFACE F-554 and F-556 from DIC Corporation; at least one of the following: Zonyl FS-520 and Zonyl 8857A from DuPont Corporation; or at least one of the following: LD-24 2006 and LD-25-2112 from Xuan Yuan Technology Co., Ltd. The amount of the agent added relative to the total mass of the polymerizable composition, by mass fraction, may be from 0.005% to 5% by mass; preferably, from 0.01% to 3% by mass; more preferably, from 0.02% to 1% by mass.

[0054] In actual coating production processes, solvents are often required to aid in the coating process. In a preferred embodiment, the solvents used in the embodiments of this application may mainly include benzenes, ketones, ethers, esters, halogenated hydrocarbons, and highly polar solvents.

[0055] In a preferred embodiment, benzene-based solvents mainly include toluene, ethylbenzene, xylene, chlorobenzene, anisole, etc.; ketone-based solvents mainly include acetone, methyl ethyl ketone, 3-pentanone, cyclopentanone, cyclohexanone, isophorone, etc.; ether-based solvents mainly include 1,4-dioxane, tetrahydrofuran, etc.; ester-based solvents mainly include ethyl acetate, butyl acetate, propylene glycol methyl ether acetate, etc.; halogenated hydrocarbon solvents mainly include dichloromethane, chloroform, 1,2-dichloroethane, etc.; highly polar solvents mainly include methanol, ethanol, isopropanol, n-butanol, tert-butanol, propylene glycol methyl ether, dimethyl sulfoxide, N,N-dimethylformamide, N,N-dimethylacetamide, N-methylpyrrolidone, N-ethyl-2-pyrrolidone, ethanolamine, acetonitrile, etc. In one embodiment, a single solvent can be used, or two or more solvents can be used simultaneously.

[0056] In actual coating production processes, silane coupling agents and amine resins are also required to enhance the adhesion between the polymeric composition and the substrate layer.

[0057] In a preferred embodiment, 3-aminopropyltriethoxysilane, or epoxy-containing coupling agent KH560, or γ-methacryloyloxypropyltrimethoxysilane can be used as the silane coupling agent.

[0058] In a preferred embodiment, the amine resin is primarily polyetheramine-modified polyurethane acrylate and polyethylene glycol diacrylate. For example, "LuCure5186" from Runao Chemical, "EM224" and "EM226" from Changxing Chemical can be used as the amine resin. The amount of additive used is from 0.01% to 5% by mass relative to the total mass of the polymerizable composition; preferably, it is from 0.5% to 3.5% by mass, and more preferably, it is from 1% to 3% by mass.

[0059] In one embodiment, the substrate layer is a transparent layer on which a photo-atomizing film layer may be laminated. Generally, one or more of polyethylene terephthalate, polycarbonate, polymethyl methacrylate, and triacetyl cellulose can be used as the substrate layer. In a preferred embodiment, the thickness of the substrate layer can be between 20 μm and 200 μm.

[0060] In one embodiment, the thickness of the anti-glare film is ≤50μm and the haze is ≥40%.

[0061] In one embodiment, this application also provides a display module, including a photo-atomizing film prepared based on the above-described preparation method.

[0062] In one embodiment, the light-diffusing film of this application can be applied to various display modules to eliminate the flashing phenomenon caused by the anti-glare layer. The following is in conjunction with... Figures 2 to 7 Describe the specific applications of the photo-atomizing film of this application in different display modules: Application 1: like Figure 2 as well as Figure 3 As shown, the specific stacked structure of the photo-atomizing film in this application includes: Bottom layer: OLED display device 201; Intermediate layer: The photo-atomizing film of this application (substrate layer + photo-atomizing depolarization film layer); Top layer: Anti-glare layer 204.

[0063] Among them, such as Figure 2 As shown, the anti-glare layer 204 and the light-dampening depolarization film layer 202 are respectively coated on both sides of the substrate layer 203; and as Figure 3 As shown, the anti-polarization film layer 303 and the anti-glare layer 304 are sequentially stacked on the substrate layer 302.

[0064] Application 2: OLED display module in COE mode; like Figure 4 As shown, the specific stacked structure of the photo-atomizing film applied in the COE mode of an OLED display module includes: Anti-glare layer 404 and light-dampening depolarization film layer 403 are respectively coated on both sides of substrate layer 404. Light-dampening depolarization film layer 403 is attached to the surface of encapsulation layer of OLED display device 401 through adhesive layer 402.

[0065] like Figure 5 As shown, another stacked structure of the photo-atomizing film of this application in the COE mode of an OLED display module includes: The substrate layer 503 is attached to the surface of the encapsulation layer of the OLED display device 501 via the adhesive layer 502, and the light-dampening depolarization film layer 504 and the anti-glare layer 505 are sequentially stacked on the substrate layer 503.

[0066] Application 3: Traditional OLED display modules / LCD display modules; The specific layering structure of the photo-atomizing film applied in traditional OLED or LCD display modules is as follows: Figure 6 As shown, the specific stacked structure of the photo-atomizing film applied in the COE mode of an OLED display module mainly includes: Bottom layer: OLED / LCD display device 601; Intermediate layer: From bottom to top, the following layers are stacked sequentially: polarizer (POL) 602, adhesive layer 603, light-dampening and depolarization film layer 604, and substrate layer 605. Top layer: Anti-glare layer 606.

[0067] like Figure 7 As shown, the photo-atomizing film of this application is applied to another stacked structure of an OLED display module or an LCD display module, including: Bottom layer: OLED display device 701; Intermediate layer: from bottom to top, polarizer POL702, adhesive layer 703, substrate layer 704, and depolarization film layer 705 are stacked sequentially; Top layer: Anti-glare layer 606.

[0068] The present invention is further illustrated below by way of examples. It should be understood that the following examples are for illustrative purposes only and are not intended to limit the invention. Unless otherwise specified, all parts in the following examples are parts by weight.

[0069] Example 1 According to the raw material formulation shown in Table 1 below, the materials were mixed evenly to obtain Composition 1. Composition 1 was then coated onto a corona-treated PET substrate layer using a bar coating method, with a bar size of 30 μm. The bar coating speed was 1 cm / s. The mixture was then placed in an 80°C oven for 2 minutes to allow the solvent to evaporate completely. Subsequently, the composition was cured by irradiation with an H-type high-pressure mercury lamp at 500 mJ under a nitrogen atmosphere, thereby obtaining the photo-fogging film of Example 1.

[0070] Table 1 Raw material formulation of composition 1

[0071] Example 2 According to the raw material formulation shown in Table 2 below, the materials were mixed evenly to obtain composition 2. Composition 2 was then coated onto the corona-treated PET substrate layer using a bar coating method, with the bar size being 30 μm. The bar coating speed was 1 cm / s. The mixture was then placed in an 80°C oven for 2 minutes to allow the solvent to evaporate completely. Subsequently, the composition was cured by irradiation with an H-type high-pressure mercury lamp at 500 mJ under a nitrogen atmosphere, thereby obtaining the photo-fogging film of Example 2.

[0072] Table 2 Raw material formulation of composition 2

[0073] Example 3 According to the raw material formula shown in Table 3 below, the ingredients are mixed evenly to obtain composition 3. Composition 3 is then processed according to the steps described in Example 1 above to obtain the photo-atomizing film of Example 3.

[0074] Table 3 Raw material formulation of composition 3

[0075] Example 4 According to the raw material formula shown in Table 4 below, the ingredients are mixed evenly to obtain composition 4. Composition 4 is then processed according to the steps described in Example 1 above to obtain the photo-atomizing film of Example 4.

[0076] Table 4 Raw material formulation of composition 4

[0077] Example 5 According to the raw material formula shown in Table 5 below, the ingredients are mixed evenly to obtain composition 5. Composition 5 is then processed according to the steps described in Example 1 above to obtain the photo-atomizing film of Example 5.

[0078] Table 5. Raw material formulation for composition 5

[0079] Example 6 According to the raw material formula shown in Table 6 below, the ingredients are mixed evenly to obtain composition 6. Composition 6 is then processed according to the steps described in Example 1 above to obtain the photo-atomizing film of Example 6.

[0080] Table 6 Raw material formulation of composition 6

[0081] Example 7 According to the raw material formula shown in Table 7 below, the ingredients are mixed evenly to obtain composition 7. Composition 7 is then processed according to the steps described in Example 1 above to obtain the photo-atomizing film of Example 7.

[0082] Table 7 Raw material formulation of composition 7

[0083] Comparative Example 1 According to the raw material formula shown in Table 8 below, the ingredients are mixed evenly to obtain composition 8. Composition 8 is then processed according to the steps described in Example 1 above to obtain the photo-atomizing film of Comparative Example 1.

[0084] Table 8 Raw material formulation of composition 8

[0085] Comparative Example 2 According to the raw material formulation shown in Table 9 below, the ingredients are mixed evenly to obtain composition 9. Composition 9 is then processed according to the steps described in Example 1 above to obtain the photo-atomizing film of Comparative Example 9.

[0086] Table 9. Raw material formulation of composition 9

[0087] Comparative Example 3 According to the raw material formula shown in Table 10 below, the raw materials are mixed evenly to obtain composition 10. Composition 10 is then processed according to the steps described in Example 1 above to obtain the photo-atomizing film of Comparative Example 3.

[0088] Table 10 Composition 10 Raw Material Formulation

[0089] Performance testing The performance tests for all embodiments in this application employ the following test items and methods: 1. Anti-flicker point performance: A light-diffusing film layer and an AGCG (anti-glare cover glass) cover plate with etched microstructures are sequentially stacked on the display screen. The light-diffusing film layer is bonded or filled with PSA glue, OCA glue, or alcohol between it and the display screen and the AGCG. The flash point performance is observed under white screen and other pure colors and test screens. The anti-flicker point level is distinguished by ★, with the highest being ★★★★★, which means the best anti-flicker point effect, with almost no visible flash point, and excellent flash point test results for white screen.

[0090] 2. Haze and transmittance: In the embodiments of this application, haze and transmittance can be tested using a haze meter in accordance with the standard GB / T 25273-2025.

[0091] The performance of the photo-atomizing films prepared in Examples 1-8 and Comparative Examples 1-3 was tested, and the test results are shown in Table 12 below.

[0092] Table 11 Test results of Examples 1-8 and Comparative Examples 1-3

[0093] Note: Flash point resistance ratings are indicated by ★, with the highest being ★★★★★.

[0094] As shown in Table 11, compared with the optical atomization films prepared by single-component polymeric compositions in Comparative Examples 1-3, the optical atomization films in Examples 1-8 all possess extremely high anti-flashpoint performance, and simultaneously exhibit high transmittance and haze. This indicates that the optical atomization films prepared using the optical atomization film preparation method provided in this application have high haze characteristics because the film layer forms at least two regions with different refractive indices on the surface of the substrate layer, and the axial angle direction of the birefringent anisotropic prepolymer is randomly oriented in different regions. When the light emitted from the display panel passes through this film layer, the light is fully scattered and homogenized, and the light that originally had a sharp directionality is dispersed and blurred, thereby making the intensity distribution of the emitted light in all directions of space tend to be uniform. When the above-mentioned optical atomization film is used in conjunction with an anti-glare film, the homogenized light incident on the anti-glare film can effectively avoid the high haze caused by the anti-glare film. The microlens magnification effect generated by the interaction between the uneven microstructure on the surface of the anti-glare film and the alternating bright and dark patterns of the pixels significantly suppresses or completely eliminates the "flickering" phenomenon, thus improving display quality. Simultaneously, because birefringent materials have different refractive indices for polarized light with different vibration directions, when linearly polarized light is incident on this film, the light experiences phase delays in different directions in different regions. Under the influence of random orientation distribution, the incident single-direction polarized light is gradually transformed into unpolarized light, i.e., natural light, which exists in all polarization directions. This significantly reduces the degree of linear polarization of the emitted light. Furthermore, when this light-diffusing film is placed on the light-emitting side of the polarizer in the display device, the uniform light incident on the anti-glare film effectively eliminates the brightness differences and contrast reduction caused by uneven distribution of polarized light at different viewing angles. This ensures that the display still has uniform brightness and color performance at oblique viewing angles, thereby greatly improving the visual experience.

[0095] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. An optical fogging film, characterized by, Includes a substrate layer, a light-dampening antipolarization film layer, and an anti-glare film; The optically atomized depolarization film is formed by photo-initiated polymerization of a polymerizable composition, wherein the polymerizable composition includes at least two prepolymers containing polymerizable groups, wherein at least one prepolymer component (A) has birefringence anisotropy. The optically atomized unpolarization film layer forms at least two regions with different refractive indices on the substrate layer. In the different regions of the optically atomized unpolarization film layer, the axial angular direction of the birefringent anisotropic prepolymer component (A) is randomly oriented.

2. The light fogging film of claim 1, wherein, The birefringent anisotropic prepolymer component (A) is present in the polymeric composition at a mass ratio of 3% to 95%.

3. The light fogging film of claim 1, wherein, The polymerizable group is selected from one or more of acrylate, methacrylate, epoxy, oxetyl, vinyl, and vinyl ether groups.

4. The light fogging film of claim 1, wherein, The thickness of the optically treated depolarizing film is 0.1 μm to 10 μm, and the haze is 40% to 99%.

5. The photo-atomizing film according to claim 1, characterized in that, The refractive index difference of the birefringent anisotropic prepolymer component (A) is 0.01~0.

5.

6. The photo-atomizing film according to claim 1, characterized in that, The anti-glare film is disposed on the side of the light-dampening and polarization-de-polarizing film layer opposite to the substrate layer, or disposed on the side of the substrate layer opposite to the light-dampening and polarization-de-polarizing film layer.

7. The photo-atomizing film according to claim 6, characterized in that, The thickness of the anti-glare film is ≤50μm, and the haze is ≥40%.

8. A method for preparing a photo-atomizing film, characterized in that, include: A polymerizable composition is coated on a substrate layer, the polymerizable composition comprising at least two prepolymers containing polymerizable groups, wherein at least one prepolymer component (A) is birefringent and anisotropic. The substrate layer coated with the polymeric composition is placed in a dry environment to evaporate the solvent, thereby obtaining a light-dampening depolarization film coating. The optically atomized unpolarization film coating is cured so that the birefringent anisotropic prepolymer component (A) is randomly oriented in the axial direction in different regions of the optically atomized unpolarization film layer, and forms at least two regions with different refractive indices, thereby obtaining a composite of the optically atomized unpolarization film and the substrate layer. An anti-glare film is applied to the composite to obtain the light-atomizing film.

9. The preparation method according to claim 8, characterized in that, The step of setting an anti-glare film on the composite to obtain the light-fogging film specifically includes: An anti-glare film is provided on the side of the cured optical de-polarization film layer opposite to the substrate layer; or An anti-glare film is provided on the side of the substrate layer opposite to the anti-polarization film layer.

10. A display module, characterized in that, Includes the photo-atomizing film as described in any one of claims 1 to 7.

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