WO2022227706A1 - Brightness enhancement film - Google Patents

Brightness enhancement film Download PDF

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Publication number
WO2022227706A1
WO2022227706A1 PCT/CN2022/071506 CN2022071506W WO2022227706A1 WO 2022227706 A1 WO2022227706 A1 WO 2022227706A1 CN 2022071506 W CN2022071506 W CN 2022071506W WO 2022227706 A1 WO2022227706 A1 WO 2022227706A1
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WO
WIPO (PCT)
Prior art keywords
brightness enhancement
enhancement film
layer
hole
microprism
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PCT/CN2022/071506
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French (fr)
Chinese (zh)
Inventor
宋庆欢
王代青
陈细俊
季洪雷
郭俊秋
Original Assignee
惠州视维新技术有限公司
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Publication of WO2022227706A1 publication Critical patent/WO2022227706A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays

Definitions

  • the invention relates to the field of functional films, in particular to a brightness enhancement film.
  • the LCD Liquid Crystal Display, liquid crystal display
  • the traditional backlight module of TV is mainly composed of four diaphragms: the lower diffuser film, the lower brightness enhancement film, the upper brightness enhancement film and the upper diffuser film.
  • the light-emitting surface of the Brightness Enhancement Film (BEF) has a prism layer structure, which can converge the incident light, play a brightening role, and improve the front-view brightness of the LCD screen. Therefore, the brightness enhancement film is an indispensable part in the liquid crystal display device.
  • the size of the diaphragm is getting larger and larger, the gap between the TV cavity is getting smaller and smaller, and the moisture absorption and dehumidification of the diaphragm are more uneven, resulting in warping and water ripples.
  • the problem is becoming more and more obvious. Therefore, how to solve the problem of moisture absorption and warpage of the film becomes very important.
  • the commonly used method in the industry is to add a large amount of low shrinkage additives (such as polyvinyl acetate (PVAc), polymethyl methacrylate (PMMA), polystyrene) to the coating.
  • low shrinkage additives such as polyvinyl acetate (PVAc), polymethyl methacrylate (PMMA), polystyrene
  • PMMA polymethyl methacrylate
  • PSt ethylene
  • the publication number is CN106556886A (published on April 5, 2017), and the Chinese patent application with the invention titled "An anti-warping optical diffuser film and its preparation method” is to design the formula of the surface coating: film formation
  • the physical resin is composed of liquid rubber and optical resin, and the mass ratio of liquid rubber and optical resin is controlled at 1:1 to 1:9 to improve the warpage resistance of the diaphragm.
  • the effects of these external additives on the optical properties and physical properties of optical films are unknown.
  • the publication number is CN102596571B (published on January 14, 2015), and the PCT international patent application titled "optical film with warpage-resistant surface” mentions that a plurality of microstructures can be fabricated on the back of the first optical film.
  • this scheme has strict requirements on the top and bottom contact surface topography and friction coefficient, and has limitations in application. Therefore, it is imminent to develop an optical film that resists uneven warping of humidity. Therefore, the existing technology has defects and needs to be improved and developed.
  • a brightness enhancement film is provided to solve the problem of warpage caused by uneven moisture absorption and dehumidification of a large size brightness enhancement film.
  • an embodiment of the present invention provides a brightness enhancement film, the brightness enhancement film includes a back coating layer, a transparent substrate layer and a microprism structure layer;
  • the transparent substrate layer is disposed on the backcoat layer
  • the micro-prism structure layer is disposed on the transparent base material layer, and the micro-prism structure layer includes a plurality of micro-prism structures;
  • At least one through hole is disposed between two adjacent microprism structures, and the through hole penetrates through the back coating layer and the transparent substrate layer.
  • the height of the microprism structure layer ranges from 5 ⁇ m to 100 ⁇ m.
  • the shape of the through hole is cylindrical or conical.
  • the diameter of the cylindrical through hole is less than 10 ⁇ m.
  • the conical through hole near the microprism structure layer is the first hole
  • the back coating layer is the first hole.
  • the area of the first orifice is larger than the area of the second orifice of the through hole.
  • the diameter of the first orifice is less than or equal to 10 ⁇ m.
  • the cross-sectional shape of the microprism structure is a triangle or a circular arc.
  • the micro-prism structure with a triangular cross-sectional shape includes an apex angle away from the transparent substrate layer, and the angle of the apex angle ranges from 60° to 120°. °.
  • the cross-sectional shape of the microprism structure is a circular arc, and the radius of the circular arc ranges from 1 ⁇ m to 100 ⁇ m.
  • the cross-sectional shape of the microprism structure is a circular arc, and the size of the circular arc angle ranges from 1° to 180°.
  • an embodiment of the present invention provides a brightness enhancement film, characterized in that the brightness enhancement film includes a back coating layer, a transparent substrate layer and a microprism structure layer;
  • the transparent substrate layer is disposed on the backcoat layer
  • the micro-prism structure layer is disposed on the transparent base material layer, and the micro-prism structure layer includes a plurality of micro-prism structures;
  • At least one through hole is disposed between two adjacent microprism structures, and the through hole penetrates through the back coating layer and the transparent substrate layer.
  • the height of the microprism structure layer ranges from 5 ⁇ m to 100 ⁇ m.
  • the diameter of the cylindrical through hole is less than 10 ⁇ m.
  • the conical through hole near the microprism structure layer is the first hole
  • the back coating layer is the first hole.
  • the area of the first orifice is larger than the area of the second orifice.
  • the diameter of the first orifice is less than or equal to 10 ⁇ m.
  • the cross-sectional shape of the microprism structure is a triangle or a circular arc.
  • the micro-prism structure with a triangular cross-sectional shape includes an apex angle away from the transparent substrate layer, and the angle of the apex angle ranges from 60° to 120°. °.
  • the cross-sectional shape of the microprism structure is a circular arc, and the radius of the circular arc ranges from 1 ⁇ m to 100 ⁇ m.
  • the material of the microprism structure layer is acrylic resin.
  • the material of the transparent substrate layer is one of PET, PC, PS and PMMA.
  • the brightness enhancement film provided by the embodiment of the present invention includes a back coating layer, a transparent substrate layer and a microprism structure layer; the transparent substrate layer is provided on the back coating layer; the microprism structure layer is provided on the On the transparent substrate layer, the micro-prism structure layer includes a plurality of micro-prism structures; at least one through hole is arranged between two adjacent micro-prism structures, and the through hole penetrates through the back coating and all the micro-prism structures. the transparent substrate layer.
  • the through hole penetrates the back coating layer and the transparent substrate layer, so that the brightness enhancement film not only has the function of concentrating and brightening, but also has excellent air permeability. Therefore, in the backlight of large-size TV, the air flow between the brightness enhancement film and the brightness enhancement film, and between the brightness enhancement film and the diffuser plate or light guide plate can be realized, so that the humidity can be fully exchanged and balanced, which can effectively solve the problem of large The warpage problem caused by the uneven moisture absorption and moisture removal of the dimensional brightening film.
  • FIG. 1 is a schematic structural diagram of a brightness enhancement film provided by an embodiment of the present invention.
  • FIG. 2 is another schematic structural diagram of the brightness enhancement film provided by the embodiment of the present invention.
  • FIG. 3 is another schematic structural diagram of the brightness enhancement film provided by the embodiment of the present invention.
  • FIG. 4 is another schematic structural diagram of the brightness enhancement film provided by the embodiment of the present invention.
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined as “first”, “second” may expressly or implicitly include one or more of said features. In the description of the present invention, “plurality” means two or more, unless otherwise expressly and specifically defined.
  • the terms “installed”, “connected” and “connected” should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection, electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements relation.
  • installed should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection, electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements relation.
  • a first feature "on” or “under” a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them.
  • the first feature being “above”, “over” and “above” the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature.
  • the first feature is “below”, “below” and “below” the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.
  • the brightness enhancement film 100 includes a back coating layer 10, a transparent substrate layer 20 and a microprism structure layer 30; the transparent substrate layer 20 is disposed on the on the back coating layer 10; the micro-prism structure layer 30 is disposed on the transparent base material layer 20, and the micro-prism structure layer 30 includes a plurality of micro-prism structures 301; There is at least one through hole 40 , the through hole 40 penetrates the back coating layer 10 and the transparent substrate layer 20 .
  • the through hole 40 penetrates through the back coating layer 10 and the transparent base material layer 20, so that the brightness enhancement film 100 not only has the function of concentrating and enhancing brightness , and also has excellent air permeability, so that the air flow between the brightness enhancement film 100 and the brightness enhancement film 100, and between the brightness enhancement film 100 and the diffusion plate or light guide plate can be realized in the backlight of a large-size TV, so that the humidity Achieving a sufficient exchange balance can effectively solve the warpage problem caused by the uneven moisture absorption and dehumidification of the large-size brightness enhancement film.
  • the height of the microprism structure layer 30 ranges from 5 ⁇ m to 100 ⁇ m.
  • the height range of the microprism structure layer 30 is set to 5 ⁇ m to 100 ⁇ m is that this height range is set according to the actual application in the current industry. In the range of 5 ⁇ m to 100 ⁇ m, the higher the height, the better the light-gathering effect of the brightness enhancement film, but the more difficult to manufacture and the higher the price, so the height range is preferably 10 ⁇ m to 30 ⁇ m.
  • the shape of the through hole 40 is cylindrical or conical.
  • the shape of the through hole 40 is set to be cylindrical or conical is because the cylindrical through hole 40 and the conical through hole 40 are simple and easy to realize, and can be drilled by laser or mechanical drilling. It should be noted that the shape of the through hole 40 is not limited to cylindrical or conical shape, because the function of the through hole 40 is to increase the air flow and accelerate the humidity balance. Therefore, as long as the through hole 40 can increase the air flow and accelerate the humidity balance, All belong to the scope of protection in this case, and are not specifically limited here.
  • the diameter of the cylindrical through hole 40 is less than 10 ⁇ m.
  • the diameter range of the through hole 40 is preferably 1 ⁇ m to 5 ⁇ m.
  • the conical through hole 40 close to the microprism structure layer 30 is the first hole 401
  • the hole close to the back coating layer 10 is the second hole 402
  • the first hole The area of the port 401 is larger than the area of the second port 402 of the through hole 40 .
  • setting the area of the first orifice 401 to be larger than the area of the second orifice 402 can take into account both the air mobility and the light-concentrating effect, that is, the air mobility and the light-concentrating effect are both better. It should be noted that, under the condition that the area of the first orifice 401 is constant, the smaller the area of the second orifice 402 is, the better the light-concentrating effect of the brightness-enhancing film is, the more delicate the appearance is, and the light penetrates the brightness-enhancing film. Still even.
  • the area of the first orifice 401 is set to 10 ⁇ m, and then the area of the second orifice 402 is set to be approximately 0 ⁇ m, at this time, the through hole 40 is still a via hole rather than a closed hole, then the brightness enhancement film at this time, The light-gathering effect will be very good, the appearance will be very delicate, and the light will still be uniform after penetrating the brightening film.
  • those skilled in the art can specifically set the area of the second orifice 402 according to the actual situation, which is not specifically limited here.
  • the diameter of the first orifice 401 is less than or equal to 10 ⁇ m.
  • the visual effect is worse and the appearance is not delicate enough.
  • the cross-sectional shape of the microprism structure 301 is a triangle or a circular arc.
  • the cross-sectional shape of the microprism structure 301 is set as a triangle or a circular arc: (1) The triangle and the circular arc have a certain converging effect on the transmitted light (light in media with different refractive indices). Refraction occurs); 2The triangle and arc shape are easy to mold engraving and easy to produce.
  • the triangular-shaped micro-prism structure 301 has better light-concentrating effect, but its light-diffusing effect is not as good as that of the arc-shaped micro-prism structure 301 .
  • the micro-prism structure 301 with a triangular cross-sectional shape includes an apex angle 3011 away from the transparent substrate layer 20 , and the angle of the apex angle 3011 ranges from 60° to 120°.
  • the angle range of the vertex angle 3011 is set according to the actual application in the current industry. In the range of 60° ⁇ 120°, the smaller the angle is, the better the condensing effect, but the worse the viewing angle (the uniform light effect). Difference). Therefore, the angle of the vertex angle 3011 is preferably 90°.
  • the cross-sectional shape of the microprism structure 301 is a circular arc, and the radius of the circular arc ranges from 1 ⁇ m to 100 ⁇ m.
  • the size range of the arc radius is set according to the actual application in the current industry. In the range of 1 ⁇ m ⁇ 100 ⁇ m, the larger the arc radius is, the better the condensing effect, but the thicker the structure, the less delicate the appearance. . Therefore, the size range of the arc radius is preferably 20 ⁇ m to 50 ⁇ m.
  • the cross-sectional shape of the micro-prism structure 301 is a circular arc, and the size of the circular arc angle ranges from 1° to 180°.
  • the size range of the arc angle is set according to the actual application in the current industry. In the range of 1° ⁇ 180°, the smaller the angle, the better the light-focusing effect and the smaller the viewing angle. Therefore, the size range of the arc angle is preferably 80° to 100°.
  • the distance between adjacent microprism structures 301 ranges from 0 ⁇ m to 50 ⁇ m.
  • the back coating 10 includes microparticles and acrylic resin, and the material of the microparticles is one of PMMA, PBMA and nylon.
  • the material of the transparent substrate layer 20 is one of PET, PC, PS and PMMA.
  • the material of the microprism structure layer 30 is acrylic resin.
  • the brightness enhancement film 100 provided by the embodiment of the present invention includes a back coating layer 10, a transparent substrate layer 20 and a microprism structure layer 30; the transparent substrate layer 20 is disposed on the back coating layer 10;
  • the prismatic structure layer 30 is disposed on the transparent base material layer 20, and the microprism structure layer 30 includes a plurality of microprism structures 301; at least one through hole 40 is disposed between two adjacent microprism structures 301, and the through hole 40 is formed. Holes 40 penetrate through the backcoat layer 10 and the transparent substrate layer 20 .
  • At least one through hole 40 is disposed between two adjacent microprism structures 301 , and the through hole 40 penetrates through the back coating layer 10 and the transparent base material layer 20 , so that the brightness enhancement film 100 not only has a light concentrating function
  • the effect of enhancing brightness also has excellent air permeability, so that air between the brightness enhancing film 100 and the brightness enhancing film 100, and between the brightness enhancing film 100 and the diffuser or light guide plate can be realized in the backlight of a large-size TV. Flow, so that the humidity can be fully exchanged and balanced, which can effectively solve the warpage problem caused by the uneven moisture absorption and moisture removal of the large-size brightness enhancement film.

Abstract

A brightness enhancement film (100). The brightness enhancement film (100) comprises a back coating (10), a transparent base material layer (20) and a microprism structure layer (30), wherein the transparent base material layer (20) is arranged on the back coating (10); the microprism structure layer (30) is arranged on the transparent base material layer (20), and the microprism structure layer (30) comprises a plurality of microprism structures (301); and at least one through hole (40) is arranged between two adjacent microprism structures (301), and the through hole (40) penetrates the back coating (10) and the transparent base material layer (20). The present invention can effectively solve the problem of warping caused by uneven moisture absorption and removal of a large-sized brightness enhancement film (100).

Description

增亮膜Brightness Enhancement Film
本申请要求于2021年04月25日提交中国专利局、申请号为202110448202.2、发明名称为“增亮膜”的中国专利申请的优先权，其全部内容通过引用结合在本发明中。This application claims the priority of the Chinese patent application with the application number 202110448202.2 and the invention name "brightness enhancement film", which was submitted to the China Patent Office on April 25, 2021, the entire contents of which are incorporated herein by reference.
技术领域technical field
本发明涉及功能薄膜领域，特别涉及一种增亮膜。The invention relates to the field of functional films, in particular to a brightness enhancement film.
背景技术Background technique
LCD（Liquid Crystal Display，液晶显示器）是目前主流的TV（television，电视）显示技术。但是，LCD为非发光性的显示器件，需要借助BLU（Back Light Unit，背光模组）提供高亮、均匀的光源才能达到显示效果。TV传统的背光模组主要由下扩散膜、下增亮膜、上增亮膜和上扩散膜四张膜片组装而成。其中，增亮膜（BEF，Brightness Enhancement Film）的出光面具有棱镜层结构，可以将入射的光线进行收敛，起增亮作用，提升液晶显示器画面的正视亮度。因此，增亮膜是液晶显示设备中必不可少的部分。LCD (Liquid Crystal Display, liquid crystal display) is the current mainstream TV (television, television) display technology. However, the LCD is a non-luminous display device, and needs to use the BLU (Back Light Unit, backlight module) to provide a bright and uniform light source to achieve the display effect. The traditional backlight module of TV is mainly composed of four diaphragms: the lower diffuser film, the lower brightness enhancement film, the upper brightness enhancement film and the upper diffuser film. Among them, the light-emitting surface of the Brightness Enhancement Film (BEF) has a prism layer structure, which can converge the incident light, play a brightening role, and improve the front-view brightness of the LCD screen. Therefore, the brightness enhancement film is an indispensable part in the liquid crystal display device.
液晶TV在运输及使用过程中，尤其是在海洋运输及季节性变化显著的地区使用时，环境湿度剧烈变化，湿度变化范围可达20%RH~95%RH。在环境湿度高、地交替变化的过程中，膜片整体吸湿、排湿不均匀，造成局部涨缩不一致，产生翘曲，形成波浪纹。这会使显示画面产生暗影和水波纹，严重影响画质效果。随着消费者追求液晶TV大尺寸、轻薄化设计，膜片尺寸越来越大，TV腔体间隙越来越小，膜片吸湿、排湿更不均匀，其所造成的翘曲，水波纹问题愈来愈明显。因此，如何解决膜片的吸湿翘曲问题变得十分重要。During the transportation and use of LCD TV, especially when it is used in marine transportation and areas with significant seasonal changes, the environmental humidity changes drastically, and the humidity range can reach 20%RH~95%RH. In the process of high ambient humidity and alternating changes of ground, the overall moisture absorption and dehumidification of the diaphragm is uneven, resulting in inconsistent local expansion and contraction, resulting in warping and forming wavy lines. This will cause dark shadows and water ripples on the display screen, which will seriously affect the picture quality. As consumers pursue large-size, light and thin LCD TVs, the size of the diaphragm is getting larger and larger, the gap between the TV cavity is getting smaller and smaller, and the moisture absorption and dehumidification of the diaphragm are more uneven, resulting in warping and water ripples. The problem is becoming more and more obvious. Therefore, how to solve the problem of moisture absorption and warpage of the film becomes very important.
针对提升光学膜片的抗翘曲性能，行业内常用的方法是在涂层中添加大量低收缩率的添加剂（如聚醋酸乙烯脂(PVAc)、聚甲基丙烯酸甲酯(PMMA)、聚苯乙烯(PSt)）来在一定程度上降低涂层或者薄膜的收缩。例如公布号为CN106556886A(公布日为2017年4月5日)，发明名称为“一种抗翘曲光学扩散膜及其制备方法”的中国专利申请中就是通过设计表面涂层的配方：成膜物树脂由液体橡胶和光学树脂构成，且液体橡胶和光学树脂的质量比例控制在1:1至1:9来提高膜片的抗翘曲性能。但是，这些外来的添加剂对光学薄膜的光学性质及物理性质的影响尚未可知。另外一些专利，例如公布号为CN102928900B(公布日为2015年6月24日)，发明名称为“一种抗翘曲光学薄膜、其制备方法及使用该光学薄膜的显示器件”的中国专利申请中提到可以在光学基材两面涂覆相同的涂层来减轻翘曲。然而这些方案虽然从技术上可以减轻翘曲，但是光学增亮膜天然存在上下表面涂层不一样的问题（上表面为棱镜结构、下表面为保护涂层）而无法适用。以上两部专利仅仅对高温翘曲有改善，而对于湿度不均匀引起的翘曲无改善效果。公布号为CN102596571B(公布日为2015年1月14日)，发明名称为“具有抗翘曲表面的光学膜”的PCT国际专利申请中提到可以在第一光学膜背面制造多个微结构的糙面表面来保持和第二光学膜的上表面（通常为线性棱柱）之间的摩擦系数小于1，这样第一光学膜背面的糙面提供的小于1的摩擦系数可提高整个光学膜叠堆（第一光学膜和第二光学膜）的翘曲性能。然而该方案对上、下膜片接触表面的形貌以及摩擦系数要求严格，应用存在局限性。因此，研究出一种抗湿度不均匀翘曲的光学薄膜迫在眉睫。因此，现有技术存在缺陷，有待改进与发展。In order to improve the warpage resistance of optical films, the commonly used method in the industry is to add a large amount of low shrinkage additives (such as polyvinyl acetate (PVAc), polymethyl methacrylate (PMMA), polystyrene) to the coating. ethylene (PSt)) to reduce the shrinkage of the coating or film to a certain extent. For example, the publication number is CN106556886A (published on April 5, 2017), and the Chinese patent application with the invention titled "An anti-warping optical diffuser film and its preparation method" is to design the formula of the surface coating: film formation The physical resin is composed of liquid rubber and optical resin, and the mass ratio of liquid rubber and optical resin is controlled at 1:1 to 1:9 to improve the warpage resistance of the diaphragm. However, the effects of these external additives on the optical properties and physical properties of optical films are unknown. Other patents, such as the publication number CN102928900B (published on June 24, 2015), are in the Chinese patent application titled "An anti-warping optical film, its preparation method and a display device using the same" It is mentioned that the same coating can be applied to both sides of the optical substrate to reduce warpage. However, although these solutions can technically reduce warpage, the optical brightness enhancement film naturally has the problem that the upper and lower surface coatings are different (the upper surface is a prism structure, and the lower surface is a protective coating) and cannot be applied. The above two patents only improve the warpage at high temperature, but have no improvement effect on the warpage caused by uneven humidity. The publication number is CN102596571B (published on January 14, 2015), and the PCT international patent application titled "optical film with warpage-resistant surface" mentions that a plurality of microstructures can be fabricated on the back of the first optical film. A matte surface to maintain a coefficient of friction less than 1 with the top surface of the second optical film (usually a linear prism), so that the matte surface on the back of the first optical film provides a coefficient of friction less than 1 that improves the overall optical film stack Warp performance of (first optical film and second optical film). However, this scheme has strict requirements on the top and bottom contact surface topography and friction coefficient, and has limitations in application. Therefore, it is imminent to develop an optical film that resists uneven warping of humidity. Therefore, the existing technology has defects and needs to be improved and developed.
技术问题technical problem
提供一种增亮膜，以解决大尺寸增亮膜片吸湿、排湿不均匀所带来的翘曲问题。A brightness enhancement film is provided to solve the problem of warpage caused by uneven moisture absorption and dehumidification of a large size brightness enhancement film.
技术解决方案technical solutions
第一方面，本发明实施例提供一种增亮膜，所述增亮膜包括背涂层、透明基材层和微棱镜结构层；In a first aspect, an embodiment of the present invention provides a brightness enhancement film, the brightness enhancement film includes a back coating layer, a transparent substrate layer and a microprism structure layer;
所述透明基材层设置于所述背涂层上；the transparent substrate layer is disposed on the backcoat layer;
所述微棱镜结构层设置于所述透明基材层上，所述微棱镜结构层包括多个微棱镜结构；The micro-prism structure layer is disposed on the transparent base material layer, and the micro-prism structure layer includes a plurality of micro-prism structures;
相邻的两个所述微棱镜结构之间设置有至少一个通孔，所述通孔贯穿所述背涂层和所述透明基材层。At least one through hole is disposed between two adjacent microprism structures, and the through hole penetrates through the back coating layer and the transparent substrate layer.
进一步的，在本发明实施例所述的增亮膜中，所述微棱镜结构层的高度范围为5μm至100μm。Further, in the brightness enhancement film according to the embodiment of the present invention, the height of the microprism structure layer ranges from 5 μm to 100 μm.
进一步的，在本发明实施例所述的增亮膜中，所述通孔的形状为圆柱形或者圆锥形。Further, in the brightness enhancement film according to the embodiment of the present invention, the shape of the through hole is cylindrical or conical.
进一步的，在本发明实施例所述的增亮膜中，圆柱形的所述通孔的直径小于10μm。Further, in the brightness enhancement film according to the embodiment of the present invention, the diameter of the cylindrical through hole is less than 10 μm.
进一步的，在本发明实施例所述的增亮膜中，圆锥形的所述通孔靠近所述微棱镜结构层的孔口为第一孔口，靠近所述背涂层的孔口为第二孔口，所述第一孔口的面积，大于所述通孔的第二孔口的面积。Further, in the brightness enhancement film according to the embodiment of the present invention, the conical through hole near the microprism structure layer is the first hole, and the back coating layer is the first hole. Two orifices, the area of the first orifice is larger than the area of the second orifice of the through hole.
进一步的，在本发明实施例所述的增亮膜中，所述第一孔口的直径小于或等于10μm。Further, in the brightness enhancement film according to the embodiment of the present invention, the diameter of the first orifice is less than or equal to 10 μm.
进一步的，在本发明实施例所述的增亮膜中，所述微棱镜结构的截面形状为三角形或者圆弧形。Further, in the brightness enhancement film according to the embodiment of the present invention, the cross-sectional shape of the microprism structure is a triangle or a circular arc.
进一步的，在本发明实施例所述的增亮膜中，截面形状为三角形的所述微棱镜结构包括远离所述透明基材层的顶角，所述顶角的角度范围为60°至120°。Further, in the brightness enhancement film according to the embodiment of the present invention, the micro-prism structure with a triangular cross-sectional shape includes an apex angle away from the transparent substrate layer, and the angle of the apex angle ranges from 60° to 120°. °.
进一步的，在本发明实施例所述的增亮膜中，截面形状为圆弧形的所述微棱镜结构，其圆弧半径的大小范围为1μm至100μm。Further, in the brightness enhancement film according to the embodiment of the present invention, the cross-sectional shape of the microprism structure is a circular arc, and the radius of the circular arc ranges from 1 μm to 100 μm.
进一步的，在本发明实施例所述的增亮膜中，截面形状为圆弧形的所述微棱镜结构，其圆弧角度的大小范围为1°至180°。Further, in the brightness enhancement film according to the embodiment of the present invention, the cross-sectional shape of the microprism structure is a circular arc, and the size of the circular arc angle ranges from 1° to 180°.
第二方面，本发明实施例提供一种增亮膜，其特征在于，所述增亮膜包括背涂层、透明基材层和微棱镜结构层；In a second aspect, an embodiment of the present invention provides a brightness enhancement film, characterized in that the brightness enhancement film includes a back coating layer, a transparent substrate layer and a microprism structure layer;
所述透明基材层设置于所述背涂层上；the transparent substrate layer is disposed on the backcoat layer;
所述微棱镜结构层设置于所述透明基材层上，所述微棱镜结构层包括多个微棱镜结构；The micro-prism structure layer is disposed on the transparent base material layer, and the micro-prism structure layer includes a plurality of micro-prism structures;
相邻的两个所述微棱镜结构之间设置有至少一个通孔，所述通孔贯穿所述背涂层和所述透明基材层。At least one through hole is disposed between two adjacent microprism structures, and the through hole penetrates through the back coating layer and the transparent substrate layer.
进一步的，在本发明实施例所述的增亮膜中，所述微棱镜结构层的高度范围为5μm至100μm。Further, in the brightness enhancement film according to the embodiment of the present invention, the height of the microprism structure layer ranges from 5 μm to 100 μm.
进一步的，在本发明实施例所述的增亮膜中，圆柱形的所述通孔的直径小于10μm。Further, in the brightness enhancement film according to the embodiment of the present invention, the diameter of the cylindrical through hole is less than 10 μm.
进一步的，在本发明实施例所述的增亮膜中，圆锥形的所述通孔靠近所述微棱镜结构层的孔口为第一孔口，靠近所述背涂层的孔口为第二孔口，所述第一孔口的面积，大于所述第二孔口的面积。Further, in the brightness enhancement film according to the embodiment of the present invention, the conical through hole near the microprism structure layer is the first hole, and the back coating layer is the first hole. Two orifices, the area of the first orifice is larger than the area of the second orifice.
进一步的，在本发明实施例所述的增亮膜中，所述第一孔口的直径小于或等于10μm。Further, in the brightness enhancement film according to the embodiment of the present invention, the diameter of the first orifice is less than or equal to 10 μm.
进一步的，在本发明实施例所述的增亮膜中，所述微棱镜结构的截面形状为三角形或者圆弧形。Further, in the brightness enhancement film according to the embodiment of the present invention, the cross-sectional shape of the microprism structure is a triangle or a circular arc.
进一步的，在本发明实施例所述的增亮膜中，截面形状为三角形的所述微棱镜结构包括远离所述透明基材层的顶角，所述顶角的角度范围为60°至120°。Further, in the brightness enhancement film according to the embodiment of the present invention, the micro-prism structure with a triangular cross-sectional shape includes an apex angle away from the transparent substrate layer, and the angle of the apex angle ranges from 60° to 120°. °.
进一步的，在本发明实施例所述的增亮膜中，截面形状为圆弧形的所述微棱镜结构，其圆弧半径的大小范围为1μm至100μm。Further, in the brightness enhancement film according to the embodiment of the present invention, the cross-sectional shape of the microprism structure is a circular arc, and the radius of the circular arc ranges from 1 μm to 100 μm.
进一步的，在本发明实施例所述的增亮膜中，所述微棱镜结构层的材质为丙烯酸树脂。Further, in the brightness enhancement film according to the embodiment of the present invention, the material of the microprism structure layer is acrylic resin.
进一步的，在本发明实施例所述的增亮膜中，所述透明基材层的材质为PET、PC、PS和PMMA中的一种。Further, in the brightness enhancement film according to the embodiment of the present invention, the material of the transparent substrate layer is one of PET, PC, PS and PMMA.
本发明实施例提供的增亮膜，包括背涂层、透明基材层和微棱镜结构层；所述透明基材层设置于所述背涂层上；所述微棱镜结构层设置于所述透明基材层上，所述微棱镜结构层包括多个微棱镜结构；相邻的两个所述微棱镜结构之间设置有至少一个通孔，所述通孔贯穿所述背涂层和所述透明基材层。The brightness enhancement film provided by the embodiment of the present invention includes a back coating layer, a transparent substrate layer and a microprism structure layer; the transparent substrate layer is provided on the back coating layer; the microprism structure layer is provided on the On the transparent substrate layer, the micro-prism structure layer includes a plurality of micro-prism structures; at least one through hole is arranged between two adjacent micro-prism structures, and the through hole penetrates through the back coating and all the micro-prism structures. the transparent substrate layer.
有益效果beneficial effect
通过在相邻的两个微棱镜结构之间设置至少一个通孔，该通孔贯穿背涂层和透明基材层，使得该增亮膜不仅具有聚光增亮的作用，还具备优异的透气性，从而能够在大尺寸TV的背光内，实现增亮膜与增亮膜之间，以及增亮膜与扩散板或导光板之间的空气流动，使得湿度达到充分交换平衡，能够有效解决大尺寸增亮膜片吸湿、排湿不均匀所带来的翘曲问题。By arranging at least one through hole between two adjacent microprism structures, the through hole penetrates the back coating layer and the transparent substrate layer, so that the brightness enhancement film not only has the function of concentrating and brightening, but also has excellent air permeability. Therefore, in the backlight of large-size TV, the air flow between the brightness enhancement film and the brightness enhancement film, and between the brightness enhancement film and the diffuser plate or light guide plate can be realized, so that the humidity can be fully exchanged and balanced, which can effectively solve the problem of large The warpage problem caused by the uneven moisture absorption and moisture removal of the dimensional brightening film.
附图说明Description of drawings
图1为本发明实施例提供的增亮膜的结构示意图。FIG. 1 is a schematic structural diagram of a brightness enhancement film provided by an embodiment of the present invention.
图2为本发明实施例提供的增亮膜的另一结构示意图。FIG. 2 is another schematic structural diagram of the brightness enhancement film provided by the embodiment of the present invention.
图3为本发明实施例提供的增亮膜的另一结构示意图。FIG. 3 is another schematic structural diagram of the brightness enhancement film provided by the embodiment of the present invention.
图4为本发明实施例提供的增亮膜的另一结构示意图。FIG. 4 is another schematic structural diagram of the brightness enhancement film provided by the embodiment of the present invention.
本发明的实施方式Embodiments of the present invention
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件一定具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本发明的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc., or The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined as "first", "second" may expressly or implicitly include one or more of said features. In the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接或可以相互通讯；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection, electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements relation. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.
在本发明中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.
下文的公开提供了许多不同的实施方式或例子用来实现本发明的不同结构。为了简化本发明的公开，下文中对特定例子的部件和设置进行描述。当然，它们仅仅为示例，并且目的不在于限制本发明。此外，本发明可以在不同例子中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。此外，本发明提供了的各种特定的工艺和材料的例子，但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the invention. Furthermore, the present disclosure may repeat reference numerals and/or reference letters in different instances for the purpose of simplicity and clarity and not in itself indicative of a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
本发明实施例提供一种增亮膜100，参考图1至图4，该增亮膜100包括背涂层10、透明基材层20和微棱镜结构层30；该透明基材层20设置于该背涂层10上；该微棱镜结构层30设置于该透明基材层20上，该微棱镜结构层30包括多个微棱镜结构301；相邻的两个该微棱镜结构301之间设置有至少一个通孔40，该通孔40贯穿该背涂层10和该透明基材层20。通过在相邻的两个微棱镜结构301之间设置至少一个通孔40，该通孔40贯穿背涂层10和透明基材层20，使得该增亮膜100不仅具有聚光增亮的作用，还具备优异的透气性，从而能够在大尺寸TV的背光内，实现增亮膜100与增亮膜100之间，以及增亮膜100与扩散板或导光板之间的空气流动，使得湿度达到充分交换平衡，能够有效解决大尺寸增亮膜片吸湿、排湿不均匀所带来的翘曲问题。An embodiment of the present invention provides a brightness enhancement film 100. Referring to FIG. 1 to FIG. 4, the brightness enhancement film 100 includes a back coating layer 10, a transparent substrate layer 20 and a microprism structure layer 30; the transparent substrate layer 20 is disposed on the on the back coating layer 10; the micro-prism structure layer 30 is disposed on the transparent base material layer 20, and the micro-prism structure layer 30 includes a plurality of micro-prism structures 301; There is at least one through hole 40 , the through hole 40 penetrates the back coating layer 10 and the transparent substrate layer 20 . By arranging at least one through hole 40 between two adjacent microprism structures 301, the through hole 40 penetrates through the back coating layer 10 and the transparent base material layer 20, so that the brightness enhancement film 100 not only has the function of concentrating and enhancing brightness , and also has excellent air permeability, so that the air flow between the brightness enhancement film 100 and the brightness enhancement film 100, and between the brightness enhancement film 100 and the diffusion plate or light guide plate can be realized in the backlight of a large-size TV, so that the humidity Achieving a sufficient exchange balance can effectively solve the warpage problem caused by the uneven moisture absorption and dehumidification of the large-size brightness enhancement film.
在一些实施例中，该微棱镜结构层30的高度范围为5μm至100μm。In some embodiments, the height of the microprism structure layer 30 ranges from 5 μm to 100 μm.
其中，之所以将微棱镜结构层30的高度大小范围设置为5μm至100μm，是因为这个高度范围是根据目前行业内的实际应用来设定的。在5μm至100μm的范围内，高度越高，增亮膜的聚光作用越好，但是制造越困难，价格也越高，因此高度范围优选10μm至30μm。The reason why the height range of the microprism structure layer 30 is set to 5 μm to 100 μm is that this height range is set according to the actual application in the current industry. In the range of 5 μm to 100 μm, the higher the height, the better the light-gathering effect of the brightness enhancement film, but the more difficult to manufacture and the higher the price, so the height range is preferably 10 μm to 30 μm.
在一些实施例中，该通孔40的形状为圆柱形或者圆锥形。In some embodiments, the shape of the through hole 40 is cylindrical or conical.
其中，之所以将通孔40的形状设置为圆柱形或者圆锥形，是因为圆柱形通孔40和圆锥形通孔40简单，易于实现，可以通过激光或者机械打孔。需要说明的是，通孔40的形状不限于圆柱形或者圆锥形，因为通孔40的作用是增加空气流动，加速湿度平衡，因此，只要是能够增加空气流动，加速湿度平衡的通孔40，都属于本案保护的范围，在此不做具体限定。The reason why the shape of the through hole 40 is set to be cylindrical or conical is because the cylindrical through hole 40 and the conical through hole 40 are simple and easy to realize, and can be drilled by laser or mechanical drilling. It should be noted that the shape of the through hole 40 is not limited to cylindrical or conical shape, because the function of the through hole 40 is to increase the air flow and accelerate the humidity balance. Therefore, as long as the through hole 40 can increase the air flow and accelerate the humidity balance, All belong to the scope of protection in this case, and are not specifically limited here.
在一些实施例中，圆柱形的该通孔40的直径小于10μm。In some embodiments, the diameter of the cylindrical through hole 40 is less than 10 μm.
其中，在通孔40的直径范围（0μm至10μm）内，直径越大，增亮膜两侧的空气流动性越好，湿度平衡越快，翘曲褶皱越小，但是，与此同时视觉效果越差，外观不够细腻，因此，通孔40的直径范围优选1μm至5μm。Among them, within the diameter range of the through hole 40 (0 μm to 10 μm), the larger the diameter is, the better the air flow on both sides of the brightness enhancement film, the faster the humidity balance, and the smaller the warp wrinkles. However, at the same time, the visual effect The worse, the appearance is not fine enough, therefore, the diameter range of the through hole 40 is preferably 1 μm to 5 μm.
在一些实施例中，圆锥形的该通孔40靠近该微棱镜结构层30的孔口为第一孔口401，靠近该背涂层10的孔口为第二孔口402，该第一孔口401的面积，大于该通孔40的第二孔口402的面积。In some embodiments, the conical through hole 40 close to the microprism structure layer 30 is the first hole 401, and the hole close to the back coating layer 10 is the second hole 402, the first hole The area of the port 401 is larger than the area of the second port 402 of the through hole 40 .
其中，将第一孔口401的面积设置为大于第二孔口402的面积，可以兼顾空气流动性和聚光效果，即空气流动性和聚光效果都比较好。需要说明的是，在第一孔口401的面积一定的情况下，第二孔口402的面积越小，增亮膜聚光效果越好，外观越细腻，并且光线在穿透增亮膜后仍然均匀。例如，将第一孔口401的面积设置为10μm，然后将第二孔口402的面积设置为近乎0μm，此时该通孔40仍属于过孔而非封闭，则此时的增亮膜，其聚光效果会很好，外观也很细腻，并且光线在穿透增亮膜后仍然均匀。当然，本领域技术人员可以根据实际情况来具体设置第二孔口402的面积，在此不做具体限定。Wherein, setting the area of the first orifice 401 to be larger than the area of the second orifice 402 can take into account both the air mobility and the light-concentrating effect, that is, the air mobility and the light-concentrating effect are both better. It should be noted that, under the condition that the area of the first orifice 401 is constant, the smaller the area of the second orifice 402 is, the better the light-concentrating effect of the brightness-enhancing film is, the more delicate the appearance is, and the light penetrates the brightness-enhancing film. Still even. For example, if the area of the first orifice 401 is set to 10 μm, and then the area of the second orifice 402 is set to be approximately 0 μm, at this time, the through hole 40 is still a via hole rather than a closed hole, then the brightness enhancement film at this time, The light-gathering effect will be very good, the appearance will be very delicate, and the light will still be uniform after penetrating the brightening film. Of course, those skilled in the art can specifically set the area of the second orifice 402 according to the actual situation, which is not specifically limited here.
在一些实施例中，该第一孔口401的直径小于或等于10μm。In some embodiments, the diameter of the first orifice 401 is less than or equal to 10 μm.
其中，在0μm至10μm这个大小范围内，第一孔口401和第二孔口402的直径越大，增亮膜两侧的空气流动性越好，湿度平衡越快，翘曲褶皱越小，但是，与此同时视觉效果越差，外观不够细腻。Among them, in the size range of 0 μm to 10 μm, the larger the diameter of the first orifice 401 and the second orifice 402 is, the better the air flow on both sides of the brightness enhancement film, the faster the humidity balance, and the smaller the warping wrinkles. However, at the same time, the visual effect is worse and the appearance is not delicate enough.
在一些实施例中，该微棱镜结构301的截面形状为三角形或者圆弧形。In some embodiments, the cross-sectional shape of the microprism structure 301 is a triangle or a circular arc.
其中，之所以将微棱镜结构301的截面形状设置为三角形或者圆弧形，原因有两个：①三角形和圆弧形对透过的光线具有一定的汇聚作用（光线在不同折射率的介质中发生折射）；②三角形和圆弧形易于模具雕刻，便于生产。此外，相比于圆弧形的微棱镜结构301，三角形的微棱镜结构301的聚光效果更好，但是，其匀光效果没有圆弧形的微棱镜结构301好。Among them, there are two reasons why the cross-sectional shape of the microprism structure 301 is set as a triangle or a circular arc: (1) The triangle and the circular arc have a certain converging effect on the transmitted light (light in media with different refractive indices). Refraction occurs); ②The triangle and arc shape are easy to mold engraving and easy to produce. In addition, compared with the arc-shaped micro-prism structure 301 , the triangular-shaped micro-prism structure 301 has better light-concentrating effect, but its light-diffusing effect is not as good as that of the arc-shaped micro-prism structure 301 .
在一些实施例中，截面形状为三角形的该微棱镜结构301包括远离该透明基材层20的顶角3011，该顶角3011的角度范围为60°至120°。In some embodiments, the micro-prism structure 301 with a triangular cross-sectional shape includes an apex angle 3011 away from the transparent substrate layer 20 , and the angle of the apex angle 3011 ranges from 60° to 120°.
其中，该顶角3011的角度范围是根据目前行业内的实际应用来设定的，在60°~120°的范围内，角度越小，聚光作用越好，但是视角越差（匀光效果差）。因此，该顶角3011的角度优选为90°。Among them, the angle range of the vertex angle 3011 is set according to the actual application in the current industry. In the range of 60°~120°, the smaller the angle is, the better the condensing effect, but the worse the viewing angle (the uniform light effect). Difference). Therefore, the angle of the vertex angle 3011 is preferably 90°.
在一些实施例中，截面形状为圆弧形的该微棱镜结构301，其圆弧半径的大小范围为1μm至100μm。In some embodiments, the cross-sectional shape of the microprism structure 301 is a circular arc, and the radius of the circular arc ranges from 1 μm to 100 μm.
其中，该圆弧半径的大小范围是根据目前行业内的实际应用来设定的，在1μm~100μm这个范围内，圆弧半径越大，聚光效果越好，但结构越粗，外观不够细腻。因此，该圆弧半径的大小范围优选为20μm~50μm。Among them, the size range of the arc radius is set according to the actual application in the current industry. In the range of 1μm~100μm, the larger the arc radius is, the better the condensing effect, but the thicker the structure, the less delicate the appearance. . Therefore, the size range of the arc radius is preferably 20 μm to 50 μm.
在一些实施例中，截面形状为圆弧形的该微棱镜结构301，其圆弧角度的大小范围为1°至180°。In some embodiments, the cross-sectional shape of the micro-prism structure 301 is a circular arc, and the size of the circular arc angle ranges from 1° to 180°.
其中，该圆弧角度的大小范围是根据目前行业内的实际应用来设定的，在1°~180°这个范围内，角度越小，聚光效果越好，视角越小。因此，该圆弧角度的大小范围优选为80°~100°。Among them, the size range of the arc angle is set according to the actual application in the current industry. In the range of 1°~180°, the smaller the angle, the better the light-focusing effect and the smaller the viewing angle. Therefore, the size range of the arc angle is preferably 80° to 100°.
在一些实施例中，相邻的微棱镜结构301的间距范围为0μm至50μm。In some embodiments, the distance between adjacent microprism structures 301 ranges from 0 μm to 50 μm.
在一些实施例中，该背涂层10包括微粒子和丙烯酸树脂，该微粒子的材质为PMMA、PBMA和尼龙中的一种。In some embodiments, the back coating 10 includes microparticles and acrylic resin, and the material of the microparticles is one of PMMA, PBMA and nylon.
在一些实施例中，该透明基材层20的材质为PET、PC、PS和PMMA中的一种。In some embodiments, the material of the transparent substrate layer 20 is one of PET, PC, PS and PMMA.
在一些实施例中，该微棱镜结构层30的材质为丙烯酸树脂。In some embodiments, the material of the microprism structure layer 30 is acrylic resin.
综上该，本发明实施例提供的增亮膜100，包括背涂层10、透明基材层20和微棱镜结构层30；该透明基材层20设置于该背涂层10上；该微棱镜结构层30设置于该透明基材层20上，该微棱镜结构层30包括多个微棱镜结构301；相邻的两个该微棱镜结构301之间设置有至少一个通孔40，该通孔40贯穿该背涂层10和该透明基材层20。本发明实施例通过在相邻的两个微棱镜结构301之间设置至少一个通孔40，该通孔40贯穿背涂层10和透明基材层20，使得该增亮膜100不仅具有聚光增亮的作用，还具备优异的透气性，从而能够在大尺寸TV的背光内，实现增亮膜100与增亮膜100之间，以及增亮膜100与扩散板或导光板之间的空气流动，使得湿度达到充分交换平衡，能够有效解决大尺寸增亮膜片吸湿、排湿不均匀所带来的翘曲问题。To sum up, the brightness enhancement film 100 provided by the embodiment of the present invention includes a back coating layer 10, a transparent substrate layer 20 and a microprism structure layer 30; the transparent substrate layer 20 is disposed on the back coating layer 10; The prismatic structure layer 30 is disposed on the transparent base material layer 20, and the microprism structure layer 30 includes a plurality of microprism structures 301; at least one through hole 40 is disposed between two adjacent microprism structures 301, and the through hole 40 is formed. Holes 40 penetrate through the backcoat layer 10 and the transparent substrate layer 20 . In this embodiment of the present invention, at least one through hole 40 is disposed between two adjacent microprism structures 301 , and the through hole 40 penetrates through the back coating layer 10 and the transparent base material layer 20 , so that the brightness enhancement film 100 not only has a light concentrating function The effect of enhancing brightness also has excellent air permeability, so that air between the brightness enhancing film 100 and the brightness enhancing film 100, and between the brightness enhancing film 100 and the diffuser or light guide plate can be realized in the backlight of a large-size TV. Flow, so that the humidity can be fully exchanged and balanced, which can effectively solve the warpage problem caused by the uneven moisture absorption and moisture removal of the large-size brightness enhancement film.
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.
以上对本发明实施例所提供的一种增亮膜进行了详细介绍，本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的技术方案及其核心思想；本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例的技术方案的范围。The brightness enhancement film provided by the embodiments of the present invention has been described in detail above. The principles and implementations of the present invention are described with specific examples in this paper. The descriptions of the above embodiments are only used to help understand the technology of the present invention. scheme and its core idea; those of ordinary skill in the art should understand that: it is still possible to modify the technical solutions recorded in the foregoing embodiments, or to perform equivalent replacements for some of the technical features; and these modifications or replacements do not make The essence of the corresponding technical solutions deviates from the scope of the technical solutions of the embodiments of the present invention.

Claims (20)

  1. 一种增亮膜，其中，所述增亮膜包括背涂层、透明基材层和微棱镜结构层；A brightness enhancement film, wherein the brightness enhancement film comprises a back coating layer, a transparent substrate layer and a microprism structure layer;
    所述透明基材层设置于所述背涂层上；the transparent substrate layer is disposed on the backcoat layer;
    所述微棱镜结构层设置于所述透明基材层上，所述微棱镜结构层包括多个微棱镜结构；The micro-prism structure layer is disposed on the transparent base material layer, and the micro-prism structure layer includes a plurality of micro-prism structures;
    相邻的两个所述微棱镜结构之间设置有至少一个通孔，所述通孔贯穿所述背涂层和所述透明基材层。At least one through hole is disposed between two adjacent microprism structures, and the through hole penetrates through the back coating layer and the transparent substrate layer.
  2. 如权利要求1所述的增亮膜，其中，所述微棱镜结构层的高度范围为5μm至100μm。The brightness enhancement film of claim 1, wherein the height of the microprism structure layer ranges from 5 μm to 100 μm.
  3. 如权利要求1所述的增亮膜，其中，所述通孔的形状为圆柱形或者圆锥形。The brightness enhancement film of claim 1, wherein the shape of the through hole is cylindrical or conical.
  4. 如权利要求3所述的增亮膜，其中，圆柱形的所述通孔的直径小于10μm。The brightness enhancement film of claim 3, wherein the diameter of the cylindrical through hole is less than 10 μm.
  5. 如权利要求3所述的增亮膜，其中，圆锥形的所述通孔靠近所述微棱镜结构层的孔口为第一孔口，靠近所述背涂层的孔口为第二孔口，所述第一孔口的面积，大于所述第二孔口的面积。The brightness enhancement film as claimed in claim 3, wherein the conical through holes close to the microprism structure layer are the first apertures, and the conical apertures close to the back coating are the second apertures , the area of the first orifice is larger than the area of the second orifice.
  6. 如权利要求5所述的增亮膜，其中，所述第一孔口的直径小于或等于10μm。The brightness enhancement film of claim 5, wherein the diameter of the first aperture is less than or equal to 10 μm.
  7. 如权利要求1所述的增亮膜，其中，所述微棱镜结构的截面形状为三角形或者圆弧形。The brightness enhancement film of claim 1, wherein the cross-sectional shape of the microprism structure is a triangle or a circular arc.
  8. 如权利要求7所述的增亮膜，其中，截面形状为三角形的所述微棱镜结构包括远离所述透明基材层的顶角，所述顶角的角度范围为60°至120°。The brightness enhancement film of claim 7 , wherein the microprism structure having a triangular cross-sectional shape includes a vertex away from the transparent substrate layer, and the vertex angle ranges from 60° to 120°.
  9. 如权利要求7所述的增亮膜，其中，截面形状为圆弧形的所述微棱镜结构，其圆弧半径的大小范围为1μm至100μm。The brightness enhancement film according to claim 7, wherein the cross-sectional shape of the microprism structure is a circular arc, and the radius of the circular arc ranges from 1 μm to 100 μm.
  10. 如权利要求7所述的增亮膜，其中，截面形状为圆弧形的所述微棱镜结构，其圆弧角度的大小范围为1°至180°。The brightness enhancement film according to claim 7, wherein the cross-sectional shape of the micro-prism structure is arc-shaped, and the arc angle ranges from 1° to 180°.
  11. 一种增亮膜，其中，所述增亮膜包括背涂层、透明基材层和微棱镜结构层；A brightness enhancement film, wherein the brightness enhancement film comprises a back coating layer, a transparent substrate layer and a microprism structure layer;
    所述透明基材层设置于所述背涂层上；the transparent substrate layer is disposed on the backcoat layer;
    所述微棱镜结构层设置于所述透明基材层上，所述微棱镜结构层包括多个微棱镜结构；The micro-prism structure layer is disposed on the transparent base material layer, and the micro-prism structure layer includes a plurality of micro-prism structures;
    相邻的两个所述微棱镜结构之间设置有至少一个通孔，所述通孔贯穿所述背涂层和所述透明基材层，所述通孔的形状为圆柱形或者圆锥形。At least one through hole is disposed between two adjacent microprism structures, the through hole penetrates the back coating layer and the transparent substrate layer, and the shape of the through hole is cylindrical or conical.
  12. 如权利要求11所述的增亮膜，其中，所述微棱镜结构层的高度范围为5μm至100μm。The brightness enhancement film of claim 11 , wherein the height of the microprism structure layer ranges from 5 μm to 100 μm.
  13. 如权利要求11所述的增亮膜，其中，圆柱形的所述通孔的直径小于10μm。The brightness enhancement film of claim 11 , wherein the diameter of the cylindrical through hole is less than 10 μm.
  14. 如权利要求11所述的增亮膜，其中，圆锥形的所述通孔靠近所述微棱镜结构层的孔口为第一孔口，靠近所述背涂层的孔口为第二孔口，所述第一孔口的面积，大于所述第二孔口的面积。The brightness enhancement film as claimed in claim 11, wherein the conical through hole close to the microprism structure layer is the first aperture, and the conical aperture close to the back coating is the second aperture , the area of the first orifice is larger than the area of the second orifice.
  15. 如权利要求14所述的增亮膜，其中，所述第一孔口的直径小于或等于10μm。The brightness enhancement film of claim 14, wherein the diameter of the first aperture is less than or equal to 10 μm.
  16. 如权利要求11所述的增亮膜，其中，所述微棱镜结构的截面形状为三角形或者圆弧形。The brightness enhancement film of claim 11, wherein the cross-sectional shape of the microprism structure is a triangle or a circular arc.
  17. 如权利要求16所述的增亮膜，其中，截面形状为三角形的所述微棱镜结构包括远离所述透明基材层的顶角，所述顶角的角度范围为60°至120°。The brightness enhancement film of claim 16 , wherein the microprism structure having a triangular cross-sectional shape includes an apex angle away from the transparent substrate layer, and the angle of the apex angle ranges from 60° to 120°.
  18. 如权利要求16所述的增亮膜，其中，截面形状为圆弧形的所述微棱镜结构，其圆弧半径的大小范围为1μm至100μm。The brightness enhancement film according to claim 16, wherein the cross-sectional shape of the microprism structure is a circular arc, and the radius of the circular arc ranges from 1 μm to 100 μm.
  19. 如权利要求11所述的增亮膜，其中，所述微棱镜结构层的材质为丙烯酸树脂。The brightness enhancement film of claim 11, wherein the material of the microprism structure layer is acrylic resin.
  20. 如权利要求11所述的增亮膜，其中，所述透明基材层的材质为PET、PC、PS和PMMA中的一种。The brightness enhancement film according to claim 11, wherein the material of the transparent substrate layer is one of PET, PC, PS and PMMA.
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