Anti-reflection optical film and display panel

Abstract

The invention relates to an anti-reflection optical film and a display panel, and relates to the technical field of display. The anti-reflection optical film comprises a polarization assembly and an anti-reflection assembly, the polarization assembly comprises a polarization layer and a lambda / 4 wave plate layer which are arranged in a stacked mode, and the polarization assembly is used for absorbing ambient light reflected by the interior of a panel body; the anti-reflection assembly is arranged on the side, away from the panel body, of the polarization assembly and comprises a first anti-reflection layer and a second anti-reflection layer, and the refractive indexes of the first anti-reflection layer and the second anti-reflection layer are different; the ambient light comprises first wave band light, second wave band light and third wave band light which are different in wavelength, the designed wavelength of the lambda / 4 wave plate layer corresponds to the center wavelength of the third wave band light, and the first antireflection layer and the second antireflection layer are used for at least carrying out destructive interference on the first wave band light and the second wave band light. Therefore, the anti-reflection performance of the polarization assembly at the first wave band light and the second wave band light is compensated. According to the technical scheme, the problem that the anti-reflection scheme performance and cost of an existing display panel are difficult to consider at the same time can be solved.

Description

Anti-reflective optical films and display panels Technical Field

[0001] This application relates to the field of display technology, and in particular to an anti-reflective optical film and a display panel. Background Technology

[0002] Organic light-emitting diode (OLED) displays have become mainstream due to their self-illumination and high contrast, but their surface metal electrodes are prone to reflecting ambient light, causing glare and affecting image quality. Current mainstream anti-reflection technologies include circular polarizers (using linear polarizers and λ / 4 waveplates) and anti-reflection coatings (AR) (multilayer thin-film interference). However, both suffer from a trade-off between performance and cost: high-performance solutions require liquid crystal polymer (LCP) or cyclic olefin polymer (COP) compensation films or multilayer precision coatings, resulting in high costs; low-cost solutions (such as polycarbonate PC waveplates) suffer from wavelength dispersion and strong viewing angle dependence, leading to color glare and performance degradation at wide viewing angles. Therefore, a solution that balances high performance and low cost is urgently needed. Summary of the Invention

[0003] This application provides an anti-reflective optical film and a display panel to solve the problem that existing display panel anti-reflective solutions cannot balance performance and cost.

[0004] In a first aspect, this application provides an anti-reflection optical film, comprising: a polarizing component including a polarizing layer and a λ / 4 waveplate layer stacked together, the polarizing layer being located on the side of the λ / 4 waveplate layer facing away from the panel body of the display panel, the polarizing component being used to absorb ambient light reflected from inside the panel body; and an anti-reflection component disposed on the side of the polarizing component facing away from the panel body, the anti-reflection component including a first anti-reflection layer and a second anti-reflection layer stacked together, the first anti-reflection layer and the second anti-reflection layer having different refractive indices; wherein, the ambient light includes a first band light, a second band light and a third band light with different wavelengths, the design wavelength of the λ / 4 waveplate layer corresponding to the center wavelength of the third band light, the first anti-reflection layer and the second anti-reflection layer being used to at least cancel interference between the first band light and the second band light, so as to compensate for the anti-reflection performance of the polarizing component at the first band light and the second band light.

[0005] In some embodiments, the third band light is a green light band with a center wavelength of 550 nm.

[0006] In some embodiments, the first band light is red light with a center wavelength of 650 nm, and the second band light is blue light with a center wavelength of 450 nm.

[0007] In some embodiments, the refractive index of the first antireflective layer is greater than the refractive index of the second antireflective layer.

[0008] In some embodiments, the refractive index n1 of the first antireflection layer is 1.80-1.85, the thickness t1 is 60nm-65nm, and satisfies n1·t1=λ_red / 4, where λ_red is the center wavelength of the first band light; the refractive index n2 of the second antireflection layer is 1.23-1.26, the thickness t2 is 88nm-92nm, and satisfies n2·t2=λ_blue / 4, where λ_blue is the center wavelength of the second band light.

[0009] In some embodiments, the antireflection assembly further includes: a base film layer disposed on the side of the polarization layer opposite to the λ / 4 waveplate layer; an antireflection structure layer disposed on the side of the base film layer opposite to the polarization layer; the antireflection structure layer includes a plurality of antireflection protrusions, which are distributed non-periodically from the center outwards in a plane parallel to the base film layer; the cross-sectional width of the antireflection protrusions gradually increases along the direction from the base film layer to the polarization assembly.

[0010] In some embodiments, the second antireflection layer is disposed on the side of the antireflection structure layer opposite to the base film layer, and the first antireflection layer is located on the side of the second antireflection layer opposite to the antireflection structure layer.

[0011] In some embodiments, the λ / 4 waveplate layer is made of polycarbonate and has a phase retardation of 137.5 nm ± 10 nm at the third wavelength.

[0012] In some embodiments, the base film layer is made of polyethylene terephthalate or cellulose triacetate; the anti-reflective protrusions are made of UV-curable resin, and the UV-curable resin is doped with nano-alumina particles.

[0013] Secondly, this application provides a display panel, comprising: a panel body; and an anti-reflective optical film as described above, disposed on the display surface of the panel body.

[0014] Compared with the prior art, the above-mentioned technical solution provided in this application has the following advantages: The anti-reflection optical film provided in this application achieves multi-level anti-reflection optimization of ambient light by combining a polarizing component and an anti-reflection component. The polarizing component and the anti-reflection component are arranged one after the other in the optical path, forming a dual defense line of outer layer interference cancellation and inner layer polarization absorption, constituting a synergistic anti-reflection mechanism and achieving an anti-reflection effect of "1+1>2". The anti-reflection component is located on the side of the polarizing component away from the main panel, serving as the outer defense line to preferentially interfere with the first and second wavelengths of ambient light, reducing the reflected light energy entering the system. The polarizing component, as the inner defense line, includes a stacked polarizing layer and a λ / 4 waveplate layer. The polarizing layer is located on the side of the λ / 4 waveplate layer away from the main panel, effectively absorbing ambient light reflected from inside the main panel, achieving basic anti-reflection function. Simultaneously, this invention solves the problem of the anti-reflection performance of traditional polarizing components in different wavelength bands. To address the issue of uneven anti-reflection performance across the entire wavelength band, the design wavelength of the λ / 4 waveplate layer corresponds to the center wavelength of the third-band light, ensuring optimal anti-reflection performance of the polarizing component in this band. The anti-reflection component includes a first anti-reflection layer and a second anti-reflection layer with different refractive indices, forming a thin-film interference structure specifically designed to destructively interfere with the first and second-band light, accurately compensating for the performance shortcomings of the polarizing component in these bands. This effectively improves upon existing low-cost solutions' problems such as wavelength dispersion, unbalanced reflection spectrum, and color glare, while avoiding the shortcomings of insufficient band coverage in single polarizing structures or single AR film solutions, balancing wide-band anti-reflection performance and visual experience. Furthermore, it simplifies the film structure while controlling costs; the structure, consisting only of a combination of a double-layer anti-reflection layer and a polarizing component, eliminates the need for complex multi-layer precision coatings or expensive LCP / COP compensation films found in existing high-performance solutions, and avoids the performance degradation associated with low-cost solutions. Its simple structure and few film layers reduce the reliance on high-precision equipment and high-end materials from the design level, simplify process control, improve production yield, and achieve a balance between high performance and low cost. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0018] Figure 1 is a schematic diagram of the structure of the anti-reflection optical film provided in an embodiment of this application; Figure 2 is a schematic diagram of the structure of the polarizing component provided in an embodiment of this application; Figure 3 is a schematic diagram of the structure of the anti-reflection protrusion provided in an embodiment of this application; Figure 4 is a schematic diagram of the structure of the display panel provided in another embodiment of this application.

[0019] Explanation of reference numerals in the attached drawings: 1. Antireflective optical film; 2. Panel body; 10. Polarizing component; 110. Polarizing layer; 120. λ / 4 waveplate layer; 130. Upper protective layer; 140. First adhesive layer; 150. Second adhesive layer; 160. Third adhesive layer; 170. Release film; 180. Lower protective layer; 20. Antireflective component; 210. First antireflective layer; 220. Second antireflective layer; 230. Base film layer; 240. Antireflective structural layer; 2401. Antireflective protrusion. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0022] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0023] Organic Light-Emitting Diode (OLED) displays, with their outstanding advantages such as self-illumination, high contrast, wide color gamut, and thinness, have been widely used in various terminal products such as smartphones, televisions, and automotive displays, becoming the mainstream technology in the current display field. However, the surface metal electrodes of OLED displays have strong light reflection characteristics, easily reflecting ambient light under normal lighting conditions, forming glare that not only reduces the contrast and clarity of the image but also exacerbates eye fatigue, seriously affecting the user's viewing experience and display quality. To solve the above-mentioned glare problem, the industry has developed a variety of anti-reflection technologies, among which the mainstream solutions are mainly divided into two categories: one is the circular polarizer solution, which uses the synergistic cooperation of a linear polarizer and a λ / 4 waveplate to convert reflected ambient light into linearly polarized light, which is then absorbed by the linear polarizer, thereby suppressing reflected light; the other is the surface anti-reflection coating (AR) solution, which uses multiple layers of thin films with different refractive indices to form an interference structure, reducing the reflectivity of ambient light on the display surface through the principle of thin-film interference destructive. However, both of the above solutions share a common technical challenge: balancing performance and cost, making it difficult to meet the needs of large-scale industry applications.

[0024] Specifically, circular polarizers are expensive and have wavelength sensitivity issues, resulting in weaker anti-reflection performance in short-wave and long-wave regions compared to the designed wavelength, and weaker anti-reflection performance at wide viewing angles compared to normal viewing angles, causing an imbalance in the reflection spectrum and color glare. To improve this color shift problem, a waveplate compensation scheme needs to be introduced. Conventionally, liquid crystal polymer (LCP) or cyclic olefin polymer (COP) compensation films are used, which have extremely high material and process costs. Besides, other high-performance anti-reflection solutions often require high-end materials and precision processes. For example, AR films are prepared using multi-layer precision coating. Such solutions are not only expensive in terms of materials, but also rely on high-precision coating equipment and complex process control, resulting in high overall manufacturing costs and limiting their application in low- to mid-range display products. Low-cost anti-reflection solutions typically use low-cost materials such as polycarbonate (PC) to prepare λ / 4 waveplates. While this effectively reduces material costs and equipment investment, PC material itself has significant wavelength dispersion defects and is highly dependent on viewing angles, leading to an imbalanced reflection spectrum and color glare. Furthermore, the anti-reflection effect deteriorates significantly at wide viewing angles, failing to meet the image quality requirements of high-end display products. Therefore, there is an urgent need in this field for an innovative solution that can balance high performance and low cost control.

[0025] To address the aforementioned technical problems, as shown in Figure 1, this application provides an anti-reflection optical film 1, including a polarizing component 10 and an anti-reflection component 20. The polarizing component 10 includes a polarizing layer 110 and a λ / 4 waveplate layer 120 stacked together. The polarizing layer 110 is located on the side of the λ / 4 waveplate layer 120 facing away from the panel body 2 of the display panel. The polarizing component 10 is used to absorb ambient light reflected from inside the panel body 2. The anti-reflection component 20 is disposed on the side of the polarizing component 10 facing away from the panel body 2. The anti-reflection component 20 includes stacked components... The first antireflection layer 210 and the second antireflection layer 220 have different refractive indices; wherein, the ambient light includes first band light, second band light and third band light with different wavelengths, the design wavelength of the λ / 4 waveplate layer 120 corresponds to the center wavelength of the third band light, and the first antireflection layer 210 and the second antireflection layer 220 are used to at least cancel the interference of the first band light and the second band light to compensate for the antireflection performance of the polarizing component 10 at the first band light and the second band light.

[0026] As can be seen from the above, by combining the polarizing component 10 and the anti-reflection component 20, multi-level anti-reflection optimization of ambient light is achieved. The polarizing component 10 and the anti-reflection component 20 are arranged one after the other in the optical path, forming a dual defense line of outer-layer interference cancellation and inner-layer polarization absorption, constituting a synergistic anti-reflection mechanism and achieving an anti-reflection effect of "1+1>2". The anti-reflection component 20 is located on the side of the polarizing component 10 away from the panel body 2, serving as the outer defense line to preferentially interfere with the first and second wavelengths of ambient light, reducing the energy of reflected light entering the system. The polarizing component 10, as the inner defense line, includes a stacked polarizing layer 110 and a λ / 4 waveplate layer 120. The polarizing layer 110 is located on the side of the λ / 4 waveplate layer 120 away from the panel body 2, effectively absorbing ambient light reflected from inside the panel body 2, achieving basic anti-reflection function. Simultaneously, this invention solves the problem of uneven anti-reflection performance of traditional polarizing components across different wavelengths, achieving full-wavelength anti-reflection. Balanced anti-reflection performance: The λ / 4 waveplate layer 120 is designed with a wavelength corresponding to the center wavelength of the third-band light, ensuring that the polarizing component 10 has the best anti-reflection performance in this band; the anti-reflection component 20 includes a first anti-reflection layer 210 and a second anti-reflection layer 220 with different refractive indices, forming a thin-film interference structure, which is specifically designed to perform destructive interference on the first-band light and the second-band light, accurately compensating for the performance shortcomings of the polarizing component in these bands; it effectively improves the problems of wavelength dispersion, reflection spectrum imbalance, and color glare in existing low-cost solutions, while avoiding the shortcomings of insufficient band coverage of single polarizing structures or single AR film solutions, taking into account both wide-band anti-reflection performance and visual experience; in addition, it simplifies the film system structure and takes cost control into account; the structure of only a combination of double anti-reflection layers and polarizing components does not require the use of complex multi-layer precision coatings or expensive LCP / COP compensation films in existing high-performance solutions, nor does it require bearing the performance degradation cost of low-cost solutions. Its simple structure and few film layers reduce the reliance on high-precision equipment and high-end materials from the design level, simplify process control, improve production yield, and achieve a balance between high performance and low cost.

[0027] It should be noted that polarizing layer 110 is a linear polarizing layer, whose function is based on the dichroic principle to convert unpolarized ambient light into linearly polarized light. Specifically, polarizing layer 110 can use polyvinyl alcohol (PVA) film as a substrate, and adsorb iodine molecules or dichroic dyes through a dyeing process. Then, through directional stretching, the iodine molecules or dye molecules are arranged in an orderly manner along the stretching direction, thereby forming selective absorption of vibrational light in a specific direction; the light vibration component parallel to the stretching direction is strongly absorbed, while the light vibration component perpendicular to the stretching direction is transmitted. The parameters of polarizing layer 110 can be selected according to specific needs. For example, the thickness of polarizing layer 110 is 5μm-30μm, the monomer transmittance is >43%, and the degree of polarization is >99.9%.

[0028] It should also be noted that the λ / 4 waveplate layer 120 is used to change the polarization state of the incident light. Its working principle is based on the linear birefringence effect: when linearly polarized light is incident on the waveplate at a 45° angle, it is decomposed into two orthogonal components vibrating along the fast axis and the slow axis. The two components have different propagation speeds in the waveplate and produce a certain phase difference upon exiting. The λ / 4 waveplate layer 120 is designed to produce a phase difference of π / 2 (i.e., a quarter-wavelength delay) at a specific wavelength. Specifically, its design wavelength corresponds to the center wavelength λ_green of the third band light, and the phase delay Γ(λ) is determined by the following formula: Γ(λ) = (2π / λ) Δn(λ) Where λ is the incident light wavelength, Δn(λ) is the birefringence of the waveplate material (which is a function of wavelength, i.e., wavelength dispersion), and d is the physical thickness of the waveplate; at the center wavelength λ_green, the target phase delay must be satisfied: target value Re(λ_green) = Δn(λ_green). d =λ_green / 4. Due to the wavelength dispersion characteristics of the λ / 4 waveplate layer 120, its birefringence Δn(λ) varies with wavelength, resulting in the actual phase delay deviating from λ / 4 in the region that deviates from the design wavelength band (first band light, second band light), causing incomplete antireflection. Therefore, the anti-reflection component 20 needs to provide targeted compensation for these wavelengths; that is, the polarizing component 10 has the best anti-reflection performance (i.e., the lowest reflectivity) at the third wavelength, while the reflectivity of the first and second wavelengths at the polarizing component 10 is relatively high, i.e., the anti-reflection performance is relatively degraded; in the optical path, the λ / 4 waveplate layer 120 works in conjunction with the polarizing layer 110: after the ambient light passes through the polarizing layer 110 and the λ / 4 waveplate layer 120 in sequence, it is converted into circularly polarized light; after being reflected inside the panel body 2, the circularly polarized light rotates in the opposite direction, and when it passes through the λ / 4 waveplate layer 120 again, it is converted back into linearly polarized light, and its vibration direction is perpendicular to the transmission axis of the polarizing layer 110, so it is absorbed by the polarizing layer 110 to achieve the anti-reflection function.

[0029] It should also be noted that, as shown in Figure 2, when the polarizing component 10 is not assembled, it includes an upper protective layer 130, a polarizing layer 110, a first adhesive layer 140, a λ / 4 waveplate layer 120, a second adhesive layer 150, a lower protective layer 180, a third adhesive layer 160, and a release film 170 arranged in sequence. The first adhesive layer 140, the second adhesive layer 150, and the third adhesive layer 160 may be, but are not limited to, pressure-sensitive adhesive layers, which can firmly adhere to each other and ensure interlayer optical coupling. The upper protective layer 130 and the lower protective layer 180 are temporary protective films, which may be, but are not limited to, triacetyl triacetate (TAC). Cellulose material is used to protect the surfaces of polarizing layer 110 and λ / 4 waveplate layer 120 from scratches in roll or sheet condition; release film 170 is a temporary release film used to protect the bottom third adhesive layer 160 from contamination or adhesion during storage and transportation; understandably, upper protective layer 130, lower protective layer 180 and release film 170 are all process auxiliary materials that will be removed in the final product.

[0030] It should also be noted that interference cancellation refers to utilizing the wave nature of light and precisely controlling the refractive index and thickness of the film to make light of a specific wavelength superimposed with opposite phases and equal amplitudes after reflection from the upper and lower surfaces of the film, thereby canceling each other out and achieving the purpose of reducing reflectivity. Understandably, the first antireflection layer 210 and the second antireflection layer 220 are used to perform interference cancellation on at least the first and second wavelength light. This means selecting different refractive index materials and controlling the physical thickness of the first antireflection layer 210 and the second antireflection layer 220 so that the optical thickness (n·d) of the two films matches the quarter wavelength of the first and second wavelength light, respectively, thereby achieving interference cancellation on the reflected light of these two wavelengths.

[0031] It should also be noted that internal reflection of panel body 2 refers to the optical phenomenon in which ambient light is reflected back by the reflective interface inside panel body 2 after entering panel body 2; panel body 2 contains a variety of highly reflective components in its internal structure, including but not limited to metal electrodes and metal wiring layers.

[0032] In some embodiments, the third band light is a green light band with a center wavelength of 550 nm.

[0033] By using the green light band as the third wavelength with a center wavelength of 550nm, the anti-reflective optical film 1 can be further improved in terms of its overall anti-reflection uniformity, visual experience, and manufacturing economy. Since the human eye has the highest visual sensitivity to light around 550nm in the green light band, which is the core band for perceiving image brightness and clarity, designing the wavelength of the λ / 4 waveplate layer 120 to correspond to the center wavelength of 550nm in the green light band ensures that the polarizing component 10 has optimal anti-reflection performance in the band most sensitive to the human eye. This effectively suppresses glare caused by ambient light reflection in this band, improves image clarity and brightness uniformity, reduces visual fatigue, and better aligns with the visual perception patterns of the human eye. Simultaneously, the visible light band is typically 380nm-780nm, with red and blue light located at opposite ends of the visible light band, with a center wavelength of 550nm. The design of the λ / 4 waveplate layer 120 for the green light band maximizes the phase compensation effect of both the red and blue light bands, expanding the effective coverage of the polarizing component 10 across the entire visible light range. This avoids the problems of large band coverage deviations and uneven anti-reflection effects caused by designing only for the end bands such as red or blue light. Furthermore, simultaneously achieving ideal anti-reflection effects for both red and blue light bands often requires more complex film structures, high-precision materials, and cumbersome manufacturing processes, significantly increasing material costs and manufacturing difficulty. This invention, using the visible light center wavelength of 550nm as the design benchmark, simplifies the structure and manufacturing process while ensuring balanced anti-reflection across the entire band, reducing costs. Based on this, the anti-reflection component 20, with its destructive interference compensation for the red and blue light bands, balances the anti-reflection performance of the three bands (red, green, and blue), effectively improving issues such as spectral imbalance, wavelength dispersion, and color glare, further enhancing the color consistency, display quality, and visual effects of the display panel in strong light environments.

[0034] It should be noted that the objective value Re(λ_green) = Δn(λ_green) d =λ_green / 4 =550nm / 4=137.5nm.

[0035] In some embodiments, the first band of light is red light with a center wavelength of 650 nm, and the second band of light is blue light with a center wavelength of 450 nm.

[0036] By setting the first band of light to the red light band with a center wavelength of 650nm and the second band of light to the blue light band with a center wavelength of 450nm, it is possible to achieve precise coverage and balanced compensation of the entire visible light band together with the aforementioned green light band (center wavelength of 550nm). The red light 650nm and the blue light 450nm correspond to the two ends of the visible light band, respectively. Using them as the key compensation bands of the antireflection component 20, the first antireflection layer 210 and the second antireflection layer 220 can cancel each other out through thin-film interference, specifically suppressing the reflected light in the red light band and the blue light band, and accurately compensating for the problems of insufficient antireflection performance and obvious wavelength dispersion that easily occur in the polarization component 10 at the above two ends of the band. By working in conjunction with the λ / 4 waveplate layer 120, centered on a 550nm green light wavelength, full-coverage anti-reflection optimization across the blue, green, and red primary color bands can be achieved. This results in a flatter and more uniform reflection spectrum across the entire visible light range, fundamentally improving issues such as color shift, color glare, and wide-viewing-angle degradation caused by insufficient band compensation. Furthermore, this design is highly compatible with the three primary color emission bands of the display panel, further enhancing color reproduction, contrast, and visual comfort.

[0037] It should be noted that the stacking order of the first antireflection layer 210 and the second antireflection layer 220 is not uniquely limited, as long as the two are stacked and meet the requirement of destructive interference for the first and second wavelength light. Different stacking orders can be selected as needed: Stacking order 1: The first antireflection layer 210 is located on the side of the second antireflection layer 220 away from the polarizing component 10 (i.e., the first antireflection layer 210 is closer to the direction of ambient light incidence): In this case, the ambient light passes through the first antireflection layer 210 first, and then through the second antireflection layer 220; Stacking order 2: The second antireflection layer 220 is located on the side of the first antireflection layer 210 away from the polarizing component 10 (i.e., the second antireflection layer 220 is closer to the direction of ambient light incidence): In this case, the ambient light passes through the second antireflection layer 220 first, and then through the first antireflection layer 210.

[0038] In some embodiments, the refractive index of the first antireflective layer 210 is greater than the refractive index of the second antireflective layer 220.

[0039] By employing a first antireflective layer 210 with a refractive index greater than that of the second antireflective layer 220, a reasonable and stable refractive index gradient can be formed between the two layers. This facilitates a more stable and efficient destructive interference effect in the red and blue light bands, thereby enhancing the antireflective component 20's ability to suppress reflected light in both bands. Furthermore, this dual-layer film system with its high and low refractive index combination is simple in structure and has a mature optical design. It allows for achieving the required refractive index difference using conventional material systems, reducing the complexity of film system design and the difficulty of process control. This improves the band matching accuracy and antireflective performance stability of the antireflective optical film 1, further ensuring the balance and reliability of the antireflective effect across the entire band.

[0040] In some embodiments, the first antireflection layer 210 has a refractive index n1 of 1.80-1.85 and a thickness t1 of 60nm-65nm, and satisfies n1·t1=λ_red / 4, where λ_red is the center wavelength of the first band light; the second antireflection layer 220 has a refractive index n2 of 1.23-1.26 and a thickness t2 of 88nm-92nm, and satisfies n2·t2=λ_blue / 4, where λ_blue is the center wavelength of the second band light.

[0041] By setting parameters such as n1, t1, n2, and t2, the first antireflection layer 210 and the second antireflection layer 220 respectively constitute quarter-wavelength film structures for the red and blue light bands. This enables the reflected light in the corresponding bands to form precise destructive interference conditions at the film interface, thereby maximizing the antireflection effect for red and blue light and compensating for the shortcomings of the polarizing component 10 in antireflection performance in the red and blue bands. By matching the refractive index and thickness, it ensures that the film has stable and efficient destructive interference capability in the target band, and also enables the antireflection component 20 to have a flat reflection spectrum in the visible light range. This is beneficial for further suppressing color glare and improving the uniformity of antireflection across the entire viewing angle and wavelength. At the same time, the aforementioned refractive index and thickness ranges are within the range achievable by commonly used optical materials, resulting in strong process controllability and high film stability. This is beneficial for simplifying process control, improving mass production yield, and reducing production costs while ensuring excellent antireflection performance.

[0042] It should be noted that the optical thickness of the first antireflection layer 210 is n1·t1=λ_red / 4=650nm / 4=162.5nm. Understandably, in the actual production process, due to objective factors such as process precision, equipment error and material property fluctuations, it is difficult to achieve an absolutely precise optical thickness of 162.5nm. Therefore, the optical thickness of the first antireflection layer 210 can fluctuate within the range of 162.5nm±10nm, which can also ensure that the first antireflection layer 210 can still form an effective interference cancellation effect on the red light band and will not significantly affect the antireflection compensation effect of the red light band, while taking into account both process feasibility and mass production stability. In addition, the optical thickness of the second antireflection layer 220 is n2·t2=λ_blue / 4=450nm / 4=112.5nm. Understandably, the optical thickness of the second antireflection layer 220 can be within the range of 112.5nm±10nm.

[0043] It should also be noted that the first antireflection layer 210 and the second antireflection layer 220 can be applied using a wet coating process. Compared with the traditional vacuum magnetron sputtering process, this process has advantages such as lower equipment investment, faster production speed, higher material utilization, and easier roll-to-roll continuous production, resulting in a significant reduction in cost.

[0044] In some embodiments, the antireflection assembly 20 further includes a base film layer 230 and an antireflection structure layer 240; the base film layer 230 is disposed on the side of the polarization layer 110 away from the λ / 4 waveplate layer 120; the antireflection structure layer 240 is disposed on the side of the base film layer 230 away from the polarization layer 110; the antireflection structure layer 240 includes a plurality of antireflection protrusions 2401, which are distributed non-periodically from the center to the periphery in a plane parallel to the base film layer 230; the cross-sectional width of the antireflection protrusions 2401 gradually increases along the direction from the base film layer 230 to the polarization assembly 10.

[0045] The base film layer 230 enables a stable connection between the antireflection component 20 and the polarizing component 10, while providing a reliable support for the antireflection structure layer 240. The antireflection structure layer 240 is composed of non-periodic antireflection protrusions 2401 that are distributed radially from the center to the surrounding area. This not only further broadens the antireflection band and weakens the viewing angle dependence, but also provides a basic structure for solving the problems of increased reflectivity and color shift at large viewing angles.

[0046] It should be noted that "non-periodic" means that the arrangement of the anti-reflection protrusions 2401 does not have a strict, repetitive periodic pattern. For example, the center distance (spacing) between adjacent anti-reflection protrusions 2401 is not a fixed value, but is randomly or quasi-randomly distributed within a certain range. The planar position coordinates of the anti-reflection protrusions 2401 do not have a strict periodic repetitive pattern, thus avoiding the formation of a regular grating structure. The non-periodic radial distribution of multiple anti-reflection protrusions 2401, compared to traditional periodic micro / nano structures, can effectively avoid optical defects such as diffraction fringes and moiré patterns that are prone to occur in periodic structures, improving the purity of the image display. The radial distribution from the center to the surrounding areas means that the anti-reflection protrusions 2401, in a plane parallel to the base film layer 230, exhibit a geometric characteristic similar to diverging from a central region to the surrounding space. For example, the arrangement direction or orientation of the anti-reflection protrusions 2401 is not completely random, but has a certain directionality, that is, extending and distributing along various directions from the center to the surrounding areas. The distribution density or spacing of the anti-reflection protrusions 2401 can also be varied. The anti-reflection protrusion 2401 gradually changes its angle with the Z-direction as the distance from the center increases, forming a structural gradient from the center to the edge. As shown in Figure 1, the angle between the anti-reflection protrusion 2401 and the Z-direction gradually increases from the center region to the edge region. The protrusion in the center region is close to vertical, mainly optimizing light rays incident in the normal direction. The protrusion in the edge region has an increased tilt angle, specifically matching light rays incident at a wide viewing angle. For example, the angle between the anti-reflection protrusion 2401 and the Z-direction is α, and α increases with the distance from the center region. This radial distribution and the change in the angle of the anti-reflection protrusion 2401 make the anti-reflection structure layer exhibit anisotropic optical characteristics at different azimuth angles (i.e., when viewing the screen from different directions), providing a structural basis for anti-reflection optimization at wide viewing angles. At the same time, the anti-reflection protrusion 2401 has a gradually increasing cross-sectional width (i.e., smaller at the top and larger at the bottom) along the direction from the base film layer 230 to the polarizing component 10. This design, together with the aforementioned refractive index gradient and anisotropic characteristics, can further optimize the light propagation path and improve anti-reflection efficiency.The gradient width structure matches the gradient distribution of material density and refractive index, further strengthening the continuously changing equivalent refractive index transition layer. This more fully realizes the smooth transition of refractive index between air and the base film layer 230, minimizing abrupt changes in refractive index and reducing light reflection loss at the interface. Simultaneously, it guides more ambient light into the antireflection component 20. Multiple suppressions are achieved through the destructive interference of the first antireflection layer 210 and the second antireflection layer 220, and the polarization absorption of the polarization component 10, further reducing reflectivity. Specifically, the antireflection protrusion 2401 is located along the base film layer 230 towards the polarization component 10. The structure design, with its gradually increasing cross-sectional width (i.e., smaller at the top and larger at the bottom), corresponds to a material density distribution that is smaller at the top and larger at the bottom, resulting in a gradual change in refractive index from top to bottom. From a microscopic perspective, the anti-reflection structure is composed of numerous small structures, while from a macroscopic perspective, these small structures together present a continuous gradual change in refractive index. Compared to an ideal structure with no height gradient, the anti-reflection protrusion 2401 in this embodiment has a certain height, and a cross-sectional view of it clearly reveals the difference in refractive index between the upper and lower regions. This gradual change characteristic enables a smooth transition in refractive index between air and the base film layer 230. This principle can be verified by the reflectance calculation formula R=(n0-n1)² / (n0+n1)² (where n0 and n1 are the refractive indices of the materials on both sides of the interface, respectively). Because the gradient structure makes the refractive index difference between air (n0) and the base film layer 230 (n1) approach 0, the interface reflectance is significantly reduced. Especially at a wide viewing angle, the gradient effect is smoother and can effectively alleviate the problems of increased reflectance, deterioration of anti-reflection effect and color shift at a wide viewing angle. In addition, the anti-reflection protrusion 2401 structure can also form anisotropy, which can specifically optimize the anti-reflection effect of incident light from different directions, further widening the anti-reflection viewing angle range. Combined with the structural design of the first anti-reflection protrusion 2401 pointing from the base film layer 230 to the polarizing component 10, with the cross-sectional width gradually increasing (i.e., smaller at the top and larger at the bottom), and the interference cancellation effect of the second anti-reflection layer 220, uniform scattering and suppression of ambient light incident from different angles can be achieved, adapting to the viewing needs of multiple scenarios.

[0047] It should be noted that the antireflective structure layer 240 is an anisotropic biomimetic nanostructure layer, for example, the antireflective structure layer 240 is a biomimetic moth eye structure; the antireflective protrusion 2401 is a nano protrusion.

[0048] It should also be noted that, as shown in Figures 1 and 3, the direction of the base film layer 230 pointing to the polarizing component 10 is the Z direction, and the cross-section of the anti-reflection protrusion 2401 is a cross-section perpendicular to the Z direction; it can be understood that, along the Z direction, the width of the cross-section of the anti-reflection protrusion 2401 gradually increases, that is, W2 > W1.

[0049] In some embodiments, the second antireflection layer 220 is disposed on the side of the antireflection structure layer 240 away from the base film layer 230, and the first antireflection layer 210 is located on the side of the second antireflection layer 220 away from the antireflection structure layer 240.

[0050] By placing the second antireflection layer 220 on the side of the antireflection structure layer 240 away from the base film layer 230, and placing the first antireflection layer 210 on the side of the second antireflection layer 220 away from the antireflection structure layer 240, the antireflection component 20 forms a continuous stacked structure of antireflection structure layer 240—second antireflection layer 220—first antireflection layer 210, which can form a multi-level synergistic antireflection system with the polarizing component 10, characterized by optical path matching, gradual refractive index change, and interference cancellation.Ambient light passes sequentially through the first antireflective layer 210, the second antireflective layer 220, and the antireflective structural layer 240 before entering the polarizing component 10. This fully utilizes the precise interference cancellation effect of the first and second antireflective layers 210 and 220 on the red and blue light bands, respectively, to compensate for the antireflective performance at both ends of the wavelength range. Simultaneously, the equivalent asymptotic refractive index distribution formed by the antireflective structural layer 240 smoothly connects with the refractive index of the second and first antireflective layers 220, further reducing interface reflection and scattering, and avoiding additional reflection and color shift caused by abrupt changes in interlayer refractive index. Thus, the various film layers cooperate optically and support each other structurally, ensuring antireflection across the entire wavelength range and a wide viewing angle. This not only improves the bonding stability and structural reliability between film layers, but also enhances the overall optical uniformity and mass production yield of the antireflective optical film 1. Furthermore, the stacking order of the second antireflective layer 220 being closer to the antireflective structural layer 240 and the first antireflective layer 210 being farther from the antireflective structural layer 240 (i.e., the second antireflective layer 220 is placed on the side of the antireflective structural layer 240 away from the base film layer 230, and the first antireflective layer 210 is located on the side of the second antireflective layer 220 away from the antireflective structural layer 240), compared to the arrangement of placing the first antireflective layer 210 closer to the antireflective structural layer 240 and the second antireflective layer 220 externally, has better optical matching and antireflective synergistic effects. Specifically: on the one hand, the second antireflective layer 220... Layer 20 is primarily used for destructive interference in the blue light band. Its design features a lower refractive index, closer to the equivalent refractive index of the antireflective layer 240. Placing the second antireflective layer 220 adjacent to the antireflective layer 240 creates a smaller refractive index difference between them, further reducing interlayer interface reflection and preventing additional interface loss and color shift caused by abrupt refractive index changes. This results in a smoother transition of the asymptotic refractive index, significantly improving antireflective stability, especially under wide-angle incidence conditions. On the other hand, the first antireflective layer 210 is primarily used for destructive interference in the red light band. Its relatively higher refractive index, placed on the outermost layer, facilitates the formation of a reasonable refractive index gradient with the surrounding air. Together with the second antireflective layer 220, it forms a film structure with a gradual transition in refractive index from high to low from the outside to the inside. This allows for better adaptation and connection with the microscopic gradual distribution of the antireflective structure layer 240, which has a smaller upper layer and a larger lower layer, and a smaller upper layer and a larger lower layer. This results in a continuous and smooth equivalent refractive index change in the overall film system on a macroscopic scale, further enhancing the antireflection effect across the entire wavelength and wide viewing angle, and suppressing the increase in reflectivity and color shift. At the same time, this layer sequence arrangement allows for stronger coupling and more significant synergistic effects between the optical thickness design of the two antireflective layers, the film system interference conditions, and the gradual refractive index distribution of the antireflective structure layer 240. Without increasing the number of film layers or the complexity of the process, it further improves the overall antireflection uniformity and optical effect.

[0051] In some embodiments, the λ / 4 waveplate layer 120 is made of polycarbonate and has a phase retardation of 137.5 nm ± 10 nm in the third wavelength band.

[0052] By fabricating a λ / 4 waveplate layer using polycarbonate (PC) material, and achieving a phase retardation of 137.5 nm ± 10 nm in the third wavelength band, the economics and mass production feasibility of the antireflective optical film 1 can be significantly improved while ensuring that the antireflective performance meets the application requirements. Polycarbonate material is widely available and inexpensive. Compared with traditional high-cost waveplate materials such as cyclic olefin polymers (COP) and liquid crystal polymers (LCP), it can significantly reduce raw material costs and processing difficulty, making it more suitable for large-scale mass production. Meanwhile, by controlling the phase delay within the range of 137.5nm±10nm, the λ / 4 waveplate layer 120 can achieve a phase delay close to the ideal 1 / 4 wavelength in the green light band (550nm), which is the design center. This ensures that the polarizing component 10 has a stable and reliable polarization conversion and anti-reflection effect in the band most sensitive to human vision. It can not only be compatible with the optical properties of polycarbonate material itself, avoiding the increase in process difficulty caused by strictly pursuing the ideal delay, but also cooperate with the anti-reflection component 20 to compensate for the red and blue light bands, making up for the defects of polycarbonate material with large wavelength dispersion and easy degradation of performance at wide viewing angles. This allows the overall film system to still achieve a balanced anti-reflection effect across the entire band and a stable anti-reflection effect at a wide viewing angle, achieving a balance between low cost and high performance anti-reflection.

[0053] It should be noted that the λ / 4 waveplate layer 120 is preferably made of optical-grade polycarbonate (PC), such as AD-5503. During the preparation process, the PC film is oriented by uniaxial or biaxial stretching to precisely control the orientation of the polymer chains and the physical thickness of the film. The parameters of the stretching process (such as stretching ratio, stretching temperature, stretching speed, etc.) need to be optimized according to the target phase retardation, so that the in-plane phase retardation of the λ / 4 waveplate layer 120 at the designed wavelength of 550nm satisfies: Re(550nm) = 137.5nm±10nm. This parameter range ensures that the λ / 4 waveplate layer 120 has a λ / 4 retardation effect for green light (550nm); the thickness of the λ / 4 waveplate layer 120 is 10μm~100μm.

[0054] It should also be noted that polycarbonate (PC) materials possess inherent wavelength dispersion characteristics; specifically, the birefringence Δn of PC materials is not a constant, but varies with the incident light wavelength λ. This variation can be approximately described by the Cauchy dispersion relation: Δn(λ) = A + B / λ² + C / λ 4Wherein, A, B, and C are constants related to material properties. This relationship indicates that the birefringence of PC material decreases with increasing wavelength, that is, it exhibits a higher birefringence for short wavelengths (such as blue light) and a lower birefringence for long wavelengths (such as red light). This makes the relationship between its retardation Re(λ) and wavelength approximately: Re(λ)∝1 / λ. This causes the birefringence phase difference between short and long wavelengths at both ends of the band to deviate from λ / 4, resulting in incomplete antireflection in the short and long wavelength regions, and high reflectivity, thus presenting a colored glare state. It is precisely because of this inherent wavelength dispersion defect of polycarbonate PC material that this invention introduces an antireflection component 20, which specifically targets the first band light (red light) and the second band light (blue light) for destructive interference to compensate for the insufficient performance of the polarizing component 10 in these bands, thereby achieving balanced antireflection across the entire band.

[0055] In some embodiments, the base film layer 230 is made of polyethylene terephthalate or cellulose triacetate; the anti-reflective protrusion 2401 is made of UV-curable resin, and the UV-curable resin is doped with nano-alumina particles.

[0056] The base film layer 230 is made of polyethylene terephthalate (PET) or triacetyl cellulose (TAC), which has high optical transparency, excellent mechanical strength and flatness, and good dimensional stability. It can provide a stable and reliable support carrier for the antireflective structure layer 240, the first antireflective layer 210 and the second antireflective layer 220. At the same time, it has good bonding compatibility with the polarizing component 10, which is beneficial to improving the overall structural strength and service life of the film layer. Moreover, the above materials are widely available and inexpensive, which can further enhance the cost advantage of the present invention. The anti-reflective protrusion 2401 is made of UV-curable resin material, which has high molding precision and fast curing speed. It is compatible with efficient and low-cost preparation processes such as wet coating and nanoimprinting, which helps to simplify the processing flow and improve production efficiency. At the same time, the doping of nano-alumina particles into the UV-curable resin can precisely control the refractive index of the anti-reflective protrusion 2401, so that it forms a better refractive index match with adjacent film layers, further optimizing the equivalent progressive refractive index distribution and improving the anti-reflection effect. In addition, the doping of nano-alumina particles can also effectively improve the hardness, wear resistance and weather resistance of the anti-reflective protrusion 2401, improve the scratch resistance of the film surface, reduce the optical performance degradation caused by scratches and wear during use, and enable the anti-reflective optical film 1 to maintain stable and excellent anti-reflection performance during long-term use.

[0057] It should be noted that the thickness of the base film layer 230 is 10μm - 100μm, and it requires high light transmittance (>90%) and low haze (<1%).

[0058] It should also be noted that the anti-reflective structure layer 240 can be prepared by the following steps: (1) Mold preparation: First, the required nanostructure pattern is made on the quartz master plate by electron beam lithography, which corresponds to the non-periodic radial distribution of anti-reflective protrusions 2401 described in this invention. Electron beam lithography has extremely high resolution (up to below 10 nm), which can precisely control the shape, size and distribution density of the nanoprotrusions to ensure that the master plate pattern is consistent with the design target; (2) Roller replication: Using the quartz master plate with the above-mentioned nanostructure pattern as the original template, the master plate structure is replicated onto the nickel alloy material by electroforming process to prepare the imprinting roller. The electroforming process can transfer the nanostructure pattern of the master plate to the surface of the metal roller with high fidelity to form an imprinting mold with the opposite structure. The nickel alloy embossing roller has good mechanical strength and wear resistance, making it suitable for long-term continuous embossing production; (3) Roll-to-roll UV nanoimprinting: The prepared embossing roller is installed on the roll-to-roll nanoimprinting equipment, and a layer of UV-curable resin is uniformly coated on the surface of the clean base film layer 230 (such as PET film). The UV-curable resin has a low viscosity in the liquid state, which can fully fill the microstructure on the surface of the embossing roller; then, the embossing roller is used to continuously emboss the base film coated with UV-curable resin, and at the same time, it is irradiated by a UV light source so that the resin can be rapidly cured under pressure. Under ultraviolet light irradiation, the resin undergoes a cross-linking reaction, transforming from a liquid to a solid state, precisely replicating the nanostructure on the surface of the impression roller. After curing and demolding, the desired antireflective structural layer 240 is formed on the surface of the base film layer 230, which includes multiple nanoscale antireflective protrusions 2401, distributed non-periodicly in a radial pattern in a plane parallel to the base film layer 230. Preferably, 5wt%-10wt% of nano-alumina (Al2O3) particles can be mixed into the ultraviolet-cured resin. The addition of nano-alumina particles can significantly improve the hardness and wear resistance of the antireflective protrusions 2401 after curing, while their nanoscale size (preferably less than 50nm) does not cause significant scattering of visible light and does not affect the optical properties of the antireflective structural layer 240.

[0059] Through the above process, the present invention successfully prepared a biomimetic moth eye structure with non-periodic radially distributed nanoprotrusions on the base film layer 230, providing a structural basis for the subsequent coating of the first antireflection layer 210 and the second antireflection layer 220 on it.

[0060] In summary, the antireflective optical film 1 provided in this application embodiment achieves excellent antireflective performance while also controlling costs through the systematic design and synergistic cooperation of the polarizing component 10, the antireflective component 20 and their internal functional layers. Specifically: (1) The polarizing component 10 uses conventional polycarbonate (PC) material as the λ / 4 waveplate layer 120, which not only significantly reduces material costs, but also serves as the polarization conversion core, capable of converting linearly polarized light into circularly polarized light, laying the foundation for subsequent absorption of reflected light. Although PC material has inherent wavelength dispersion characteristics, this application enables low-cost materials to meet high-performance antireflective requirements through targeted compensation of subsequent functional layers, achieving a balance between material cost and optical performance; (2) By setting a first antireflective layer 210 and a second antireflective layer 220 with different refractive indices, a double-layer interference film structure is formed, specifically for destructive interference of the red and blue light bands. The design precisely compensates for the wavelength dispersion defect of PC material, making the reflection spectrum flatter and effectively eliminating the color glare common in traditional structures, achieving balanced anti-reflection performance across the entire band; (3) By setting an anti-reflection structure layer 240, which contains multiple anti-reflection protrusions 2401 that are non-periodicly distributed radially from the center to the periphery, and the angle between the anti-reflection protrusions 2401 and the thickness direction gradually increases from the central region to the edge region. This structural design enables incident light from different angles to achieve targeted refractive index matching: the vertical anti-reflection protrusion 2401 in the central region optimizes incident light in the normal direction, and the tilted anti-reflection protrusion 2401 in the edge region optimizes oblique incident light at large angles; at the same time, the high sensitivity of the tilted protrusion to blue light and the effective extension of the red light reflection path by the angle gradient are combined to reduce the reflectivity of red and blue light at large angles, and the reflection spectrum remains flat at large angles, thereby significantly improving the oblique viewing experience and eliminating the color shift phenomenon at large angles; (4) through the basic polarization absorption of the polarization component 10, the band selective interference cancellation of the anti-reflection layer, and the wide-angle refractive index gradient of the anti-reflection structure layer 240, this application forms a triple synergistic anti-reflection system, which provides a solution for improving the picture quality of the display panel.

[0061] This application embodiment also provides a method for preparing an anti-reflective optical film 1, comprising: S100: preparing a polarizing component 10 by bonding a 25 μm thick polyvinyl alcohol (PVA) polarizer and an 80 μm thick polycarbonate (PC) λ / 4 waveplate together using a 25 μm thick acrylic pressure-sensitive adhesive (PSA). The in-plane phase retardation Re of the PC waveplate is controlled to be 135 nm by a stretching process (at a design wavelength of 550 nm, the target value is 137.5 nm ± 10 nm, and 135 nm is within this tolerance range). After bonding, upper and lower protective films and a release film 170 are sequentially attached to the back of the component.

[0062] It should be noted that the thickness of each layer mentioned above is only an example and can be adjusted according to specific needs in actual production. For example, the thickness of PVA polarizer can be selected from 5-30μm, the thickness of PC waveplate can be selected from 10-100μm, and the thickness of PSA adhesive layer can also be optimized according to bonding process and optical requirements.

[0063] S200: Preparation of Antireflective Components 20 S201: Base Film Preparation A 75μm thick optical-grade polyethylene terephthalate (PET) film is selected as the base film layer 230. This base film has high light transmittance (>90%) and low haze (<1%), and its surface is treated with corona discharge or primer to enhance the adhesion of subsequent coatings. In other embodiments, cellulose triacetate (TAC) can also be used as the base film material, or other thicknesses in the range of 50-100μm can be selected according to product thickness requirements; S202: Preparation of Antireflective Structural Layer 240 UV-curable resin is coated on one side of the PET base film, and the structure is replicated using a roll-to-roll UV nanoimprinting process. The imprinting roller used is a nickel alloy roller with a "spotlight-like" nanostructure pattern on its surface. This roller is replicated by electroforming after preparing a quartz master plate using electron beam lithography. The microstructure parameters of the imprinting roller, for example, a period of 300 nm and a depth of 200 nm, correspond to the non-periodic radial distribution of antireflective protrusions 2401 in this invention. During the imprinting process, UV-curable resin fills the roller microstructure and is simultaneously cured by UV irradiation. After demolding, the required antireflective structure layer 240 is formed on the surface of the base film; S203: Preparation of antireflective layer On the surface of the formed antireflective structure layer 240, a double-layer antireflective film is sequentially deposited using a wet coating process. First, a first antireflective layer 210 is coated, with the material refractive index controlled at 1.80-1.85 and the physical thickness controlled at 60-65 nm, so that its optical thickness corresponds to a quarter wavelength of red light (650 nm); then, a second antireflective layer 220 is coated, with the material refractive index controlled at 1.23-1.26 and the physical thickness controlled at 88-92 nm, so that its optical thickness corresponds to a quarter wavelength of blue light (450 nm). Wet coating processes can employ methods such as slot coating and microgravure coating, requiring low equipment investment and suitable for large-scale continuous production; S204: Adhesive and release film 170 are bonded to the other side of the PET base film (i.e., the side without the anti-reflection structural layer 240), pressure-sensitive adhesive (PSA) is coated, and release film 170 is applied to complete the preparation of the anti-reflection component 20; S300: Assemble the polarizing component 10 and the anti-reflection component 20 by bonding the prepared polarizing component 10 and the anti-reflection component 20. Before bonding, the upper protective layer 130 on the upper surface of the polarizing component 10 is removed, and the base film side of the anti-reflection component 20 (i.e., the side of the PET base film without pressure-sensitive adhesive) is bonded to the upper surface of the PVA polarizing layer 110 of the polarizing component 10 using optical adhesive or directly. During bonding, it should be ensured that there are no bubbles or dust contamination, and curing should be carried out under appropriate pressure and temperature to form a complete composite anti-reflection optical film 1.

[0064] When finally attaching the composite film to the panel body 2, the bottom release film 170 and the lower protective layer 180 are removed in sequence, and the composite film is firmly attached to the display surface of the panel body 2 through the exposed pressure-sensitive adhesive layer.

[0065] It can be seen that the above preparation method adopts a modular production approach, which prepares the polarizing component 10 and the anti-reflection component 20 separately and then laminates them together, thereby improving production flexibility and yield. The whole process system is mature, with low equipment investment and high production efficiency.

[0066] As shown in Figure 4, this application embodiment also provides a display panel, including a panel body and an anti-reflective optical film 1 as described in any previous embodiment, wherein the anti-reflective optical film 1 is disposed on the display surface of the panel body.

[0067] It should be noted that the main body of the panel 2 may be, but is not limited to, an OLED panel.

[0068] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0069] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0070] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An antireflective optical film, characterized in that, include: A polarizing component includes a polarizing layer and a λ / 4 waveplate layer stacked together. The polarizing layer is located on the side of the λ / 4 waveplate layer facing away from the main body of the display panel. The polarizing component is used to absorb ambient light reflected from inside the main body of the display panel. An anti-reflection component is disposed on the side of the polarizing component facing away from the main body of the display panel. The anti-reflection component includes a first anti-reflection layer and a second anti-reflection layer stacked together. The first anti-reflection layer and the second anti-reflection layer have different refractive indices. The ambient light includes a first band light, a second band light, and a third band light with different wavelengths. The design wavelength of the λ / 4 waveplate layer corresponds to the center wavelength of the third band light. The first anti-reflection layer and the second anti-reflection layer are used to at least cancel the interference of the first band light and the second band light to compensate for the anti-reflection performance of the polarizing component at the first band light and the second band light.

2. The antireflective optical film according to claim 1, characterized in that, The third band of light is green light, and its center wavelength is 550nm.

3. The antireflective optical film according to claim 2, characterized in that, The first band of light is red light with a center wavelength of 650nm, and the second band of light is blue light with a center wavelength of 450nm.

4. The antireflective optical film according to claim 3, characterized in that, The refractive index of the first antireflective layer is greater than that of the second antireflective layer.

5. The antireflective optical film according to claim 4, characterized in that, The first antireflection layer has a refractive index n1 of 1.80-1.85 and a thickness t1 of 60nm-65nm, and satisfies n1·t1=λ_red / 4, where λ_red is the center wavelength of the first band of light; the second antireflection layer has a refractive index n2 of 1.23-1.26 and a thickness t2 of 88nm-92nm, and satisfies n2·t2=λ_blue / 4, where λ_blue is the center wavelength of the second band of light.

6. The antireflective optical film according to any one of claims 1-5, characterized in that, The anti-reflection component further includes: a base film layer disposed on the side of the polarization layer opposite to the λ / 4 waveplate layer; an anti-reflection structure layer disposed on the side of the base film layer opposite to the polarization layer; the anti-reflection structure layer includes a plurality of anti-reflection protrusions, which are distributed non-periodically from the center outwards in a plane parallel to the base film layer; the cross-sectional width of the anti-reflection protrusions gradually increases along the direction from the base film layer to the polarization component.

7. The antireflective optical film according to claim 6, characterized in that, The second antireflection layer is disposed on the side of the antireflection structure layer opposite to the base film layer, and the first antireflection layer is located on the side of the second antireflection layer opposite to the antireflection structure layer.

8. The antireflective optical film according to any one of claims 1-5, characterized in that, The λ / 4 waveplate layer is made of polycarbonate, and the phase retardation at the third wavelength is 137.5 nm ± 10 nm.

9. The antireflective optical film according to claim 6, characterized in that, The base film layer is made of polyethylene terephthalate or cellulose triacetate; the anti-reflective protrusions are made of UV-curable resin, and the UV-curable resin is doped with nano-alumina particles.

10. A display panel, characterized in that, include: Panel body; an anti-reflective optical film as described in any one of claims 1-9, disposed on the display surface of the panel body.

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