CN114335375A

Movatterモバイル変換

Info

Publication number: CN114335375A
Application number: CN202011057551.3A
Authority: CN
Inventors: 王冠楠; 徐铖; 费文娟; 张瑾
Original assignee: SVG Tech Group Co Ltd
Current assignee: SVG Tech Group Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2022-04-12

Abstract

Description

Translated fromChinese

增亮膜Brightness Enhancement Film

技术领域technical field

本发明涉及显示器技术领域，特别涉及一种增亮膜。The present invention relates to the technical field of displays, in particular to a brightness enhancement film.

背景技术Background technique

目前，OLED(有机发光二极管)作为一种新型的照明和显示技术，在照明和显示领域有着极大的应用前景，随着新型材料的不断问世，OLED已经可以获得接近100％的内量子效率，但是由于柔性基底与空气分界面的全反射和有机层的波导效应的影响，OLED还只能够获得20％左右的外量子效率，这就导致了OLED的亮度不够理想。At present, OLED (Organic Light Emitting Diode), as a new type of lighting and display technology, has great application prospects in the field of lighting and display. With the continuous advent of new materials, OLED has achieved nearly 100% internal quantum efficiency, However, due to the influence of the total reflection at the interface between the flexible substrate and the air and the waveguide effect of the organic layer, the OLED can only obtain an external quantum efficiency of about 20%, which leads to an unsatisfactory brightness of the OLED.

在OLED的内部加入光子晶体的方法可以有效提高外量子效率，但是需要对其内部结构进行调整，破坏了原有结构，增加了制备工艺的难度，同时也会改变辐射光谱的分布。对基底表面进行微结构处理同样可以改善外量子效率。但是这些方法分别存在着对基底折射率要求较为苛刻、只能对某一波段光线的外量子效率进行提高、只能实现某一观测角范围内的发光效率的改善等问题。另外，OLED作为一种面光源还存在着发光不均匀的缺点，无源OLED在恒压驱动条件下,电阻上的压降将产生严重的亮度不均匀性，可以通过增加辅助电极可以改善亮度非均匀性，但是增加了OLED器件的结构复杂程度。而有源OLED由于晶化工艺的局限性，在大幅面的器件上常常在阈值电压、迁移率等电学参数上具有非均匀性，可以通过开关管逐行扫描输入OLED电流可以解决这些问题，但同样需要增加额外的器件整合至OLED上。如何通过简易的方式改善OLED的亮度和发光均匀性的问题是急需解决的问题。The method of adding photonic crystals inside the OLED can effectively improve the external quantum efficiency, but its internal structure needs to be adjusted, which destroys the original structure, increases the difficulty of the preparation process, and also changes the distribution of the radiation spectrum. Microstructuring the substrate surface can also improve external quantum efficiency. However, these methods have some problems, such as relatively strict requirements on the refractive index of the substrate, only improving the external quantum efficiency of a certain wavelength band of light, and only improving the luminous efficiency within a certain observation angle range. In addition, OLED, as a surface light source, also has the disadvantage of uneven light emission. Under the condition of constant voltage driving, passive OLED will cause serious brightness unevenness due to the voltage drop on the resistance. It can be improved by adding auxiliary electrodes. uniformity, but increases the structural complexity of the OLED device. However, due to the limitations of the crystallization process, active OLEDs often have non-uniformity in electrical parameters such as threshold voltage and mobility on large-format devices. These problems can be solved by scanning the input OLED current row by row through the switch tube. It is also necessary to add additional devices to be integrated on the OLED. The problem of how to improve the brightness and luminous uniformity of OLED in a simple way is an urgent problem to be solved.

发明内容SUMMARY OF THE INVENTION

有鉴于此，本发明提供一种增亮膜，能够实现OLED显示装置增亮，并使OLED显示装置发光更均匀。In view of this, the present invention provides a brightness enhancement film, which can enhance the brightness of an OLED display device and make the OLED display device emit light more uniformly.

一种增亮膜，包括相对设置的第一表面和第二表面，第一表面之内或之上设置有微纳结构层，微纳结构层包括第一微纳结构区以及绕着第一微纳结构区周向设置的第二微纳结构区，第一微纳结构区包括多个第一微纳结构，各第一微纳结构包括多个第一斜面，各第一斜面与第二表面之间具有第一倾斜锐角，第二微纳结构区包括多个第二微纳结构，各第二微纳结构包括多个第二斜面，各第二斜面与第二表面之间具有第二倾斜锐角，第二倾斜锐角与第一倾斜锐角角度不同，使得第二微纳结构区的出光率大于第一微纳结构区的出光率。A brightness enhancement film, comprising a first surface and a second surface arranged opposite to each other, a micro-nano structure layer is arranged in or on the first surface, and the micro-nano structure layer includes a first micro-nano structure region and surrounding the first micro-nano structure area. A second micro-nano structure region arranged in the circumferential direction of the nano-structure region, the first micro-nano structure region includes a plurality of first micro-nano structures, each first micro-nano structure includes a plurality of first slopes, and each first slope and a second surface There is a first inclination acute angle between them, the second micro-nano structure region includes a plurality of second micro-nano structures, each second micro-nano structure includes a plurality of second inclined surfaces, and each second inclined surface has a second inclination between the second surface The angle of the second acute angle is different from that of the first acute angle, so that the light extraction rate of the second micro-nano structure region is greater than that of the first micro-nano structure region.

在本发明的实施例中，上述第一微纳结构区内的多个该第一倾斜锐角大小不同；该第二微纳结构区内的多个该第二倾斜锐角大小不同；多个该第一微纳结构之间紧密排布或按设定规律排布；多个该第二微结构之间紧密排布或按设定规律排布。In the embodiment of the present invention, a plurality of the first inclined acute angles in the first micro-nano structure area are different in size; a plurality of the second inclined acute angles in the second micro-nano structure area are different in size; a plurality of the first inclined acute angles are different in size; A micro-nano structure is closely arranged or arranged according to a set rule; a plurality of the second microstructures are closely arranged or arranged according to a set rule.

在本发明的实施例中，上述第一微纳结构区内的多个该第一倾斜锐角大小相同；该第二微纳结构区内的多个该第二倾斜锐角大小相同；该第一微纳结构区对应发光点的中心区域设置，该第二微纳结构区对应发光点的边缘区域设置。In the embodiment of the present invention, a plurality of the first inclination acute angles in the first micro-nano structure area are the same in size; a plurality of the second inclination acute angles in the second micro-nano structure area are the same in size; the first micro-nano structure area has the same size; The nano-structure region is arranged corresponding to the central region of the light-emitting point, and the second micro-nano structure region is arranged corresponding to the edge region of the light-emitting point.

在本发明的实施例中，上述增亮膜的第一表面凹陷形成有多个凹孔，该第一微纳结构区的该第一微纳结构具有一个该凹孔，该第二微纳结构区的该第二微纳结构具有一个该凹孔，该第一倾斜锐角与该第一微纳结构区的孔径呈反比，与该第一微纳结构的深度呈正比；该第二倾斜锐角与该第二微纳结构的孔径呈反比，与该第二微纳结构的深度呈正比；该第一倾斜锐角范围为35°～60°；该第二倾斜锐角范围为35°～60°。In an embodiment of the present invention, a plurality of concave holes are formed on the first surface of the above-mentioned brightness enhancement film, the first micro-nano structure in the first micro-nano structure region has one of the concave holes, and the second micro-nano structure The second micro-nano structure in the region has one of the concave holes, the first oblique acute angle is inversely proportional to the aperture of the first micro-nano structure region, and is proportional to the depth of the first micro-nano structure; the second oblique acute angle is proportional to the The aperture of the second micro-nano structure is inversely proportional to the depth of the second micro-nano structure; the first inclination acute angle ranges from 35° to 60°; the second inclination acute angle ranges from 35° to 60°.

在本发明的实施例中，上述增亮膜的材质包括PET、PMMA、热固化树脂、光固化树脂。In the embodiment of the present invention, the material of the above-mentioned brightness enhancement film includes PET, PMMA, thermosetting resin, and light curing resin.

在本发明的实施例中，上述增亮膜的第一表面凹陷形成有多个凹孔，该第一微纳结构区的该第一微纳结构具有一个该凹孔，该第二微纳结构区的该第二微纳结构具有一个该凹孔，各该第一微纳结构的深度与各该第二微纳结构的深度相同，该第一微纳结构区的孔径与该第二微纳结构区的孔径不同。In an embodiment of the present invention, a plurality of concave holes are formed on the first surface of the above-mentioned brightness enhancement film, the first micro-nano structure in the first micro-nano structure region has one of the concave holes, and the second micro-nano structure The second micro-nano structure in the region has one of the concave holes, the depth of each first micro-nano structure is the same as the depth of each second micro-nano structure, and the pore diameter of the first micro-nano structure region is the same as the second micro-nano structure. The pore sizes of the structured regions are different.

在本发明的实施例中，上述增亮膜的第一表面凹陷形成有多个凹孔，该第一微纳结构区的该第一微纳结构具有一个该凹孔，该第二微纳结构区的该第二微纳结构具有一个该凹孔，该第一微纳结构区的孔径与该第二微纳结构区的孔径相同，各该第一微纳结构的深度与各该第二微纳结构的深度不同。In an embodiment of the present invention, a plurality of concave holes are formed on the first surface of the above-mentioned brightness enhancement film, the first micro-nano structure in the first micro-nano structure region has one of the concave holes, and the second micro-nano structure The second micro-nano structure in the region has one of the concave holes, the pore size of the first micro-nano structure region is the same as the pore size of the second micro-nano structure region, and the depth of each first micro-nano structure is the same as that of each second micro-nano structure. The depth of the nanostructures is different.

在本发明的实施例中，上述各第一微纳结构的深度范围为10μm～50μm，各该第二微纳结构的深度范围为10μm～50μm；各该第一微纳结构的孔径范围为10μm～120μm；各该第二微纳结构区的孔径范围为10μm～120μm。In the embodiment of the present invention, the depth range of each of the first micro/nano structures is 10 μm˜50 μm, the depth range of each of the second micro/nano structures is 10 μm˜50 μm, and the pore size range of each of the first micro/nano structures is 10 μm. ˜120 μm; the pore diameter of each of the second micro-nano structure regions ranges from 10 μm to 120 μm.

在本发明的实施例中，上述增亮膜还包括基底，该基底的材料包括PET、PMMA、玻璃，该基底的光学特性满足在波长380～780纳米的可见光的透过率在80％以上。In an embodiment of the present invention, the above-mentioned brightness enhancement film further includes a substrate, the material of which includes PET, PMMA, and glass, and the optical properties of the substrate satisfy the transmittance of visible light with a wavelength of 380-780 nm above 80%.

在本发明的实施例中，上述第一微纳结构和该第二微纳结构的形状包括金字塔型、棱锥体、棱台、四面体、球台、圆锥体中的一种或至少两种的组合。In an embodiment of the present invention, the shapes of the first micro-nano structure and the second micro-nano structure include one or a combination of at least two of pyramid, pyramid, pyramid, tetrahedron, ball table, and cone .

本发明的增亮膜结构简单，第一微纳结构的第一斜面可将光线折射至第一微纳结构区的上方，通过设定不同的第二倾斜锐角与第一倾斜锐角，使得第二微纳结构区的出光率大于第一微纳结构区的出光率，从而实现OLED显示装置增亮，并使OLED显示装置发光更均匀。The brightness enhancement film of the present invention has a simple structure, the first inclined surface of the first micro-nano structure can refract light to the top of the first micro-nano structure region, and by setting different second inclination acute angles and first inclination acute angles, the second The light extraction rate of the micro-nano structure region is greater than that of the first micro-nano structure region, so that the OLED display device can be brightened and the OLED display device can emit light more uniformly.

附图说明Description of drawings

图1是本发明第一实施例的增亮膜的剖面结构示意图。FIG. 1 is a schematic cross-sectional structure diagram of a brightness enhancement film according to a first embodiment of the present invention.

图2是本发明第一实施例的微纳结构单元的俯视结构示意图。FIG. 2 is a schematic top-view structural diagram of the micro-nano structural unit according to the first embodiment of the present invention.

图3是本发明第一实施例的第一微纳结构和第二微纳结构的放大结构示意图。FIG. 3 is an enlarged schematic structural diagram of the first micro-nano structure and the second micro-nano structure according to the first embodiment of the present invention.

图4是本发明的增亮膜的光线折射路径示意图。FIG. 4 is a schematic diagram of the light refraction path of the brightness enhancement film of the present invention.

图5是本发明第二实施例的增亮膜的剖面结构示意图。5 is a schematic cross-sectional structure diagram of a brightness enhancement film according to a second embodiment of the present invention.

具体实施方式Detailed ways

第一实施例first embodiment

图1是本发明第一实施例的增亮膜的剖面结构示意图，图2是本发明第一实施例的微纳结构单元的俯视结构示意图，图3是本发明第一实施例的第一微纳结构和第二微纳结构的放大结构示意图，请参照图1至图3，增亮膜包括相对设置的第一表面10和第二表面11，第一表面10之内或之上设置有微纳结构层12，微纳结构层12包括第一微纳结构区13以及绕着第一微纳结构区13周向设置的第二微纳结构区14，第一微纳结构区13包括多个第一微纳结构131，各第一微纳结构131包括多个第一斜面131a，各第一斜面131a与第二表面11之间具有第一倾斜锐角β1，第二微纳结构区14包括多个第二微纳结构141，各第二微纳结构141包括多个第二斜面141a，各第二斜面141a与第二表面11之间具有第二倾斜锐角β2，第二倾斜锐角β2与第一倾斜锐角β1角度不同，使得第二微纳结构141的出光率大于第一微纳结构区13的出光率。1 is a schematic cross-sectional structure diagram of a brightness enhancement film according to a first embodiment of the present invention, FIG. 2 is a schematic top-view structure diagram of a micro-nano structural unit according to the first embodiment of the present invention, and FIG. 3 is a first micro-nano structure unit according to the first embodiment of the present invention. The enlarged schematic diagrams of the nano-structure and the second micro-nano structure, please refer to FIG. 1 to FIG. 3 , the brightness enhancement film includes afirst surface 10 and asecond surface 11 which are arranged opposite to each other, and thefirst surface 10 is provided with a micro The nano-structure layer 12 includes a firstmicro-nano structure region 13 and a secondmicro-nano structure region 14 circumferentially arranged around the firstmicro-nano structure region 13 , and the firstmicro-nano structure region 13 includes a plurality of The firstmicro-nano structure 131, each firstmicro-nano structure 131 includes a plurality of firstinclined planes 131a, and each firstinclined plane 131a has a first inclined acute angle β1 with thesecond surface 11, and the secondmicro-nano structure region 14 includes a plurality of firstinclined planes 131a. Each of the secondmicro-nano structures 141 includes a plurality of secondinclined surfaces 141a, and each secondinclined surface 141a has a second inclined acute angle β2 between the secondinclined surface 141a and thesecond surface 11, and the second inclined acute angle β2 is related to the firstinclined surface 141a. The angle of the inclined acute angle β1 is different, so that the light extraction rate of the secondmicro-nano structure 141 is greater than that of the firstmicro-nano structure region 13 .

如图4所示，本发明的增亮膜结构简单，第一微纳结构131的第一斜面131a可将光线折射至第一微纳结构区13的上方，通过设定不同的第二倾斜锐角β2与第一倾斜锐角β1，使得第二微纳结构区14的出光率大于第一微纳结构区13的出光率，从而实现OLED显示装置增亮，并使OLED显示装置发光更均匀。As shown in FIG. 4 , the brightness enhancement film of the present invention has a simple structure, and the firstinclined surface 131a of the firstmicro-nano structure 131 can refract light to the top of the firstmicro-nano structure region 13. By setting different second acute inclination angles β2 and the first oblique acute angle β1 make the light extraction rate of the secondmicro-nano structure region 14 greater than that of the firstmicro-nano structure region 13 , thereby realizing brightening of the OLED display device and making the OLED display device emit light more uniformly.

进一步地，第一微纳结构区13内的多个第一微纳结构131的第一倾斜锐角β1大小不同；第二微纳结构区14内的多个第一微纳结构141的第二倾斜锐角β2大小不同；多个第一微纳结构131之间紧密排布或按设定规律排布；多个第二微结构141之间紧密排布或按设定规律排布。Further, the first inclination acute angles β1 of the plurality of firstmicro-nano structures 131 in the firstmicro-nano structure region 13 are different in size; the second inclination of the plurality of firstmicro-nano structures 141 in the secondmicro-nano structure region 14 The acute angles β2 are different in size; the plurality of firstmicro-nano structures 131 are closely arranged or arranged according to a predetermined rule; the plurality ofsecond microstructures 141 are closely arranged or arranged according to a predetermined rule.

进一步地，多个第一微纳结构131之间例如呈矩阵或蜂窝状紧密排布；多个第二微结构141之间例如呈矩阵或蜂窝状紧密排布。在本实施例中，多个第一微纳结构131之间呈蜂窝状紧密排布，多个第二微纳结构141之间呈蜂窝状紧密排布。Further, the plurality of firstmicro-nano structures 131 are, for example, closely arranged in a matrix or honeycomb shape; the plurality ofsecond microstructures 141 are, for example, closely arranged in a matrix or honeycomb shape. In this embodiment, the plurality of firstmicro-nano structures 131 are closely arranged in a honeycomb shape, and the plurality of secondmicro-nano structures 141 are closely arranged in a honeycomb shape.

进一步地，第一微纳结构区13内的多个第一倾斜锐角β1大小相同；第二微纳结构区14内的多个第二倾斜锐角β2大小相同；第一微纳结构区13对应发光点的中心区域设置，第二微纳结构区14对应发光点的边缘区域设置。在本实施例中，增亮膜设置在显示装置(OELD)上，发光点为显示装置发出的光，当显示装置有多个发光点时或有多个显示装置发光时，各微纳结构层12分别与显示装置的多个发光点对应设置。Further, the plurality of first inclination acute angles β1 in the firstmicro-nano structure region 13 have the same size; the plurality of second inclination acute angles β2 in the secondmicro-nano structure region 14 have the same size; the firstmicro-nano structure region 13 corresponds to light emission. The center region of the dot is set, and the secondmicro-nano structure region 14 is set corresponding to the edge region of the light-emitting dot. In this embodiment, the brightness enhancement film is arranged on the display device (OELD), and the light-emitting point is the light emitted by the display device. When the display device has multiple light-emitting points or multiple display devices emit light, eachmicro-nano structure layer 12 are respectively arranged corresponding to the plurality of light-emitting points of the display device.

进一步地，增亮膜设置在显示装置上时，第一微纳结构区13内的多个第一微纳结构131的第一倾斜锐角β1的角度小于第二微纳结构区14内的多个第二微纳结构141的第二倾斜锐角β2的角度。Further, when the brightness enhancement film is disposed on the display device, the angle of the first acute oblique angle β1 of the plurality of firstmicro-nano structures 131 in the firstmicro-nano structure region 13 is smaller than that of the plurality of firstmicro-nano structures 131 in the secondmicro-nano structure region 14 . The angle of the second inclined acute angle β2 of the secondmicro-nano structure 141 .

进一步地，增亮膜的第一表面10凹陷形成有多个凹孔101，第一微纳结构区13的第一微纳结构131具有一个凹孔101，第二微纳结构区14的第二微纳结构141具有一个凹孔101，第一倾斜锐角β1与第一微纳结构区13的孔径r呈反比，与第一微纳结构131的深度h呈正比；第二倾斜锐角β2与第二微纳结构141的孔径r呈反比，与第二微纳结构141的深度h呈正比；第一倾斜锐角β1范围为35°～60°；第二倾斜锐角β2范围为35°～60°。优选地，第一倾斜锐角β1为36.42°、45.08°、52.13°，第二倾斜锐角β2为37.56°、49.98°、58.71°。Further, a plurality ofconcave holes 101 are formed on thefirst surface 10 of the brightness enhancement film, the firstmicro-nano structure 131 of the firstmicro-nano structure region 13 has oneconcave hole 101, Themicro-nano structure 141 has aconcave hole 101, the first oblique acute angle β1 is inversely proportional to the aperture r of the firstmicro-nano structure region 13, and is proportional to the depth h of the firstmicro-nano structure 131; the second oblique acute angle β2 is inversely proportional to the second The aperture r of themicro-nano structure 141 is inversely proportional to the depth h of the secondmicro-nano structure 141 ; the first oblique acute angle β1 ranges from 35° to 60°; the second oblique acute angle β2 ranges from 35° to 60°. Preferably, the first acute inclination angle β1 is 36.42°, 45.08°, 52.13°, and the second acute inclination angle β2 is 37.56°, 49.98°, 58.71°.

进一步地，增亮膜的材质包括PET、PMMA、热固化树脂、光固化树脂。例如为UV胶，UV胶在加热处理后或者光线照射后,能在较短的时间内迅速发生物理和化学变化，进而固化。Further, the material of the brightness enhancement film includes PET, PMMA, thermosetting resin, and light curing resin. For example, UV glue, UV glue can rapidly undergo physical and chemical changes in a short period of time after heat treatment or light irradiation, and then cure.

进一步地，增亮膜的第一表面10凹陷形成有多个凹孔101，第一微纳结构区13的第一微纳结构131具有一个凹孔101，第二微纳结构区14的第二微纳结构141具有一个凹孔101，各第一微纳结构131的深度h与各第二微纳结构141的深度h相同，第一微纳结构区13内的第一微纳结构131的孔径r与第二微纳结构区14内的第二微纳结构141的孔径r不同。在本实施例中，第一微纳结构区13的孔径r大于第二微纳结构区14的孔径r。Further, a plurality ofconcave holes 101 are formed on thefirst surface 10 of the brightness enhancement film, the firstmicro-nano structure 131 of the firstmicro-nano structure region 13 has oneconcave hole 101, Themicro-nano structure 141 has aconcave hole 101 , the depth h of each firstmicro-nano structure 131 is the same as the depth h of each secondmicro-nano structure 141 , and the aperture of the firstmicro-nano structure 131 in the first micro-nano structure region 13 r is different from the pore size r of the secondmicro-nano structure 141 in the secondmicro-nano structure region 14 . In this embodiment, the aperture r of the firstmicro-nano structure region 13 is larger than the aperture r of the secondmicro-nano structure region 14 .

进一步地，第一微纳结构区13的孔径r范围为10μm～120μm；第二微纳结构区14的孔径r范围为10μm～120μm。优选地，第一微纳结构区13内的第一微纳结构131的孔径r为57μm、95μm、100μm，第二微纳结构区14内的第二微纳结构141的孔径r为34μm、80μm、98μm。Further, the pore size r of the firstmicro-nano structure region 13 ranges from 10 μm to 120 μm; the pore size r of the secondmicro-nano structure region 14 ranges from 10 μm to 120 μm. Preferably, the pore size r of the firstmicro-nano structure 131 in the firstmicro-nano structure region 13 is 57 μm, 95 μm, and 100 μm, and the pore size r of the secondmicro-nano structure 141 in the secondmicro-nano structure region 14 is 34 μm and 80 μm. , 98μm.

进一步地，各第一微纳结构131的深度h与各第二微纳结构141的深度h范围为10μm～50μm，优选地，各第一微纳结构131的深度h与各第二微纳结构141的深度h均为12μm、27.5μm、32μm。Further, the depth h of each firstmicro-nano structure 131 and the depth h of each secondmicro-nano structure 141 range from 10 μm to 50 μm. Preferably, the depth h of each firstmicro-nano structure 131 and each second micro-nano structure The depths h of 141 are all 12 μm, 27.5 μm, and 32 μm.

进一步地，增亮膜还包括基底20，基底20的材料包括PET、PMMA、玻璃，基底20的光学特性满足在波长380～780纳米的可见光的透过率在80％以上。Further, the brightness enhancement film further includes asubstrate 20, the material of thesubstrate 20 includes PET, PMMA, glass, and the optical properties of thesubstrate 20 satisfy the transmittance of visible light with a wavelength of 380-780 nm above 80%.

进一步地，第一微纳结构131和第二微纳结构141的形状包括金字塔型、棱锥体、棱台、四面体、球台、圆锥体中的一种或至少两种的组合。在本实施例中，各第一微纳结构131和各第二微纳结构141是由第一表面10凹陷形成，优选地，第一微纳结构131和第二微纳结构141为三棱锥形，但并不以此为限。Further, the shapes of the firstmicro-nano structure 131 and the secondmicro-nano structure 141 include one or a combination of at least two of pyramid, pyramid, pyramid, tetrahedron, ball table, and cone. In this embodiment, each of the firstmicro-nano structures 131 and each of the secondmicro-nano structures 141 are formed by recesses on thefirst surface 10 . Preferably, the firstmicro-nano structures 131 and the secondmicro-nano structures 141 are triangular pyramids. , but not limited to this.

具体地，在本实施例中，第一微纳结构131和第二微纳结构141为三棱锥形，呈蜂窝状紧密排布。第一微纳结构131的孔径r为95μm，第二微纳结构141的孔径r为80μm,第一微纳结构131的深度h与第二微纳结构141的深度h均为27.5μm,第一倾斜锐角β1为45.08°，第二倾斜锐角β2为49.98°。Specifically, in this embodiment, the firstmicro-nano structures 131 and the secondmicro-nano structures 141 are triangular pyramids, and are closely arranged in a honeycomb shape. The aperture r of the firstmicro-nano structure 131 is 95 μm, the aperture r of the secondmicro-nano structure 141 is 80 μm, the depth h of the firstmicro-nano structure 131 and the depth h of the secondmicro-nano structure 141 are both 27.5 μm. The acute inclination angle β1 is 45.08°, and the second acute inclination angle β2 is 49.98°.

第二实施例Second Embodiment

图5是本发明第二实施例的增亮膜的剖面结构示意图,如图5所示，本实施例的增亮膜与第一实施例的增亮膜大致相同，不同点在于第一实施例中第一微纳结构131的深度h和第二微纳机构141的深度h相同，第一微纳结构131的孔径r和第二微纳结构141的孔径r不同。本实施例中第一微纳结构131的深度h和第二微纳机构141的深度h不同，第一微纳结构131的孔径r和第二微纳结构141的孔径r相同。FIG. 5 is a schematic cross-sectional structure diagram of the brightness enhancement film of the second embodiment of the present invention. As shown in FIG. 5 , the brightness enhancement film of this embodiment is substantially the same as the brightness enhancement film of the first embodiment, and the difference lies in the first embodiment. The depth h of the firstmicro-nano structure 131 and the depth h of the secondmicro-nano structure 141 are the same, and the aperture r of the firstmicro-nano structure 131 and the aperture r of the secondmicro-nano structure 141 are different. In this embodiment, the depth h of the firstmicro-nano structure 131 is different from the depth h of the secondmicro-nano structure 141 , and the aperture r of the firstmicro-nano structure 131 is the same as the aperture r of the secondmicro-nano structure 141 .

进一步地，增亮膜的第一表面10凹陷形成有多个凹孔101，第一微纳结构区13的第一微纳结构131具有一个凹孔101，第二微纳结构区14的第二微纳结构141具有一个凹孔101，第一倾斜锐角β1与第一微纳结构区13内第一微纳结构131的孔径r呈反比，与第一微纳结构131的深度h呈正比；第二倾斜锐角β2与第二微纳结构141的孔径r呈反比，与第二微纳结构141的深度h呈正比；第一倾斜锐角β1范围为35°～60°；第二倾斜锐角β2范围为35°～60°。优选地，第一倾斜锐角β1为36.42°、44.88°、52.13°，第二倾斜锐角β2为37.56°、49.98°、58.71°。Further, a plurality ofconcave holes 101 are formed on thefirst surface 10 of the brightness enhancement film, the firstmicro-nano structure 131 of the firstmicro-nano structure region 13 has oneconcave hole 101, Themicro-nano structure 141 has aconcave hole 101, the first oblique acute angle β1 is inversely proportional to the aperture r of the firstmicro-nano structure 131 in the firstmicro-nano structure region 13, and is proportional to the depth h of the firstmicro-nano structure 131; The two acute oblique angles β2 are inversely proportional to the aperture r of the secondmicro-nano structure 141 and proportional to the depth h of the secondmicro-nano structure 141 ; the first oblique acute angle β1 ranges from 35° to 60°; the second oblique acute angle β2 ranges from 35°～60°. Preferably, the first acute inclination angle β1 is 36.42°, 44.88°, 52.13°, and the second acute inclination angle β2 is 37.56°, 49.98°, 58.71°.

进一步地，增亮膜的第一表面10凹陷形成有多个凹孔101，第一微纳结构区13的第一微纳结构131具有一个凹孔101，第二微纳结构区14的第二微纳结构141具有一个凹孔101，第一微纳结构区13的孔径r与第二微纳结构区14的孔径r相同，各第一微纳结构131的深度h与各第二微纳结构141的深度h不同。在本实施例中，各第一微纳结构131的深度h小于各第二微纳结构141的深度h，第一微纳结构区13的孔径r等于第二微纳结构区14的孔径r。Further, a plurality ofconcave holes 101 are formed on thefirst surface 10 of the brightness enhancement film, the firstmicro-nano structure 131 of the firstmicro-nano structure region 13 has oneconcave hole 101, Themicro-nano structure 141 has aconcave hole 101, the pore size r of the firstmicro-nano structure region 13 is the same as the pore size r of the secondmicro-nano structure region 14, and the depth h of each firstmicro-nano structure 131 is the same as that of each second micro-nano structure. The depth h of 141 is different. In this embodiment, the depth h of each firstmicro-nano structure 131 is smaller than the depth h of each secondmicro-nano structure 141 , and the aperture r of the firstmicro-nano structure region 13 is equal to the aperture r of the secondmicro-nano structure region 14 .

进一步地，各第一微纳结构131的深度h范围为10μm～50μm，各第二微纳结构141的深度h范围为10μm～50μm。优选地，各第一微纳结构131的深度h为12μm、23μm、32μm，第二微纳结构221的深度h为13μm、27.5μm、32μm。Further, the depth h of each of the firstmicro-nano structures 131 ranges from 10 μm to 50 μm, and the depth h of each of the secondmicro-nano structures 141 ranges from 10 μm to 50 μm. Preferably, the depths h of the firstmicro-nano structures 131 are 12 μm, 23 μm, and 32 μm, and the depths h of the second micro-nano structures 221 are 13 μm, 27.5 μm, and 32 μm.

进一步地，第一微纳结构区13与第二微纳结构区14的孔径r范围为10μm～120μm。优选地，第一微纳结构区13和第二微纳结构区14的孔径r均为41μm、80μm、98μm。Further, the pore size r of the firstmicro-nano structure region 13 and the secondmicro-nano structure region 14 ranges from 10 μm to 120 μm. Preferably, the pore diameters r of the firstmicro-nano structure region 13 and the secondmicro-nano structure region 14 are both 41 μm, 80 μm, and 98 μm.

具体地，在本实施例中，第一微纳结构131和第二微纳结构141为三棱锥形，呈蜂窝状紧密排布。第一微纳结构区13与第二微纳结构区14的孔径r均为80μm,第一微纳结构131的深度h为23μm，第二微纳结构141的深度h为27.5μm,第一倾斜锐角β1为44.88°，第二倾斜锐角β2为49.98°。Specifically, in this embodiment, the firstmicro-nano structures 131 and the secondmicro-nano structures 141 are triangular pyramids, and are closely arranged in a honeycomb shape. The apertures r of the firstmicro-nano structure region 13 and the secondmicro-nano structure region 14 are both 80 μm, the depth h of the firstmicro-nano structure 131 is 23 μm, the depth h of the secondmicro-nano structure 141 is 27.5 μm, the first inclination The acute angle β1 is 44.88°, and the second oblique acute angle β2 is 49.98°.

关于增亮膜的其他结构请参照第一实施例，此处不再赘述。For other structures of the brightness enhancement film, please refer to the first embodiment, which will not be repeated here.

本发明并不限于上述实施方式中的具体细节，在本发明的技术构思范围内，可以对本发明的技术方案进行多种简单变型，这些简单变型均属于本发明的保护范围。在上述具体实施方式中所描述的各个具体技术特征，在不矛盾的情况下，可以通过任何合适的方式进行组合。为了避免不必要的重复，本发明对各种可能的组合方式不再另行说明。The present invention is not limited to the specific details in the above-mentioned embodiments, and within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, and these simple modifications all belong to the protection scope of the present invention. The various specific technical features described in the above-mentioned specific embodiments may be combined in any suitable manner under the condition of no contradiction. In order to avoid unnecessary repetition, the present invention will not describe various possible combinations.

Claims

2. The brightness enhancement film according to claim 1, wherein the first acute tilt angles in the first micro-nano structured region are different in size; the second micro-nano structure area is provided with a plurality of second inclined acute angles; a plurality of the first micro-nano structures are closely arranged or arranged according to a set rule; the plurality of second microstructures are closely arranged or arranged according to a set rule.

3. The brightness enhancement film according to claim 1, wherein the first acute tilt angles in the first micro-nano structured region are the same size; the second micro-nano structure area is provided with a plurality of second inclined acute angles; the first micro-nano structure area is arranged corresponding to the central area of the light-emitting point, and the second micro-nano structure area is arranged corresponding to the edge area of the light-emitting point.

4. The brightness enhancing film according to claim 1, wherein a plurality of recesses are formed in a first surface of the brightness enhancing film, the first micro-nano structure of the first micro-nano structure area has one recess, the second micro-nano structure of the second micro-nano structure area has one recess, and the first acute tilt angle is inversely proportional to the aperture of the first micro-nano structure area and directly proportional to the depth of the first micro-nano structure area; the second acute inclination angle is inversely proportional to the aperture of the second micro-nano structure and is proportional to the depth of the second micro-nano structure; the first acute inclination angle ranges from 35 degrees to 60 degrees; the second acute angle of inclination ranges from 35 to 60 °.

5. The brightness enhancing film according to claim 1, wherein the material of the brightness enhancing film comprises PET, PMMA, thermosetting resin, and light curing resin.

6. The brightness enhancement film according to claim 1, wherein a plurality of recesses are formed in a first surface of the brightness enhancement film, the first micro-nano structure of the first micro-nano structure area has one recess, the second micro-nano structure of the second micro-nano structure area has one recess, the depth of each first micro-nano structure is the same as that of each second micro-nano structure, and the aperture of the first micro-nano structure area is different from that of the second micro-nano structure area.

8. The brightness enhancement film according to claim 6 or 7, wherein each of the first micro-nano structures has a depth ranging from 10 μm to 50 μm, and each of the second micro-nano structures has a depth ranging from 10 μm to 50 μm; the aperture range of each first micro-nano structure is 10-120 mu m; the aperture range of each second micro-nano structure area is 10-120 mu m.

9. The brightness enhancing film according to claim 1, further comprising a substrate made of PET, PMMA, glass, wherein the substrate has an optical property such that the transmittance of visible light with a wavelength of 380-780 nm is 80% or higher.

10. The brightness enhancing film of claim 1, wherein the first micro-nano structure and the second micro-nano structure comprise one or a combination of at least two of a pyramid, a frustum, a tetrahedron, a frustum of a sphere, and a cone.