TWI352827B - Integrated optical film - Google Patents

Description

1352827 IX. Description of the Invention: [Technical Field] The present invention relates to an optical film, and more particularly to an optical film applied to a liquid crystal display. [Prior Art] The liquid crystal panel itself does not emit light. Therefore, the backlight module as a brightness source is an important component of the LCD display function, and the brightness of the liquid crystal display is improved.

The words are very important. At present, the use of a wide variety of optical 臈 in the backlight module provides an application that can increase the brightness of the LCD panel to make the light source the most efficient, without the need to change any component design or consume additional energy. Economical and simple solution. Figure 〖 is a simple schematic diagram of various optical films contained in the backlight module. As shown in FIG. 1 , the optical film included in the general backlight module includes a reflective film (1) disposed under the light guide (2); and other optical films disposed above the light guide plate (2). From bottom to top, the order is: diffusion film (3), concentrating film (4) and (5) and protective diffusion film (6). The main function of the expansion film is to provide a uniform surface light source for the liquid crystal display. The concentrating film industry is known as Brightness Enhancement FUm or prism film. The main function of the concentrating film is to collect scattered light by refraction and internal total reflection, and concentrate it to about ±35 degrees. The positive viewing angle (On·—direction' to increase the brightness of the LCD. The commonly used concentrating film uses a linear columnar structure arranged regularly to achieve a concentrating effect. The film is shown in Figure 2, and the 纟 contains a base. The material 21 and the plurality of 稜鏡 structures 22 located above the substrate 21, the money structure are parallel to each other, wherein each 稜鏡 structure H is formed by an inclined surface, and the inclined surface 128054.doc 1352827 intersects at the top of the raft to form a peak. 23' and each of the other inclined surfaces of the adjacent turns intersect at the bottom of the crucible to form a valley 24. Since the conventional light collecting film is a regular strip structure of a fixed width, it is easy to reflect or refract light with other films from the display. Or other reflected or refracted light of the concentrating sheet itself produces an optical interference phenomenon, resulting in the appearance of a moire or Newton ring. Further, as shown in FIG. 3, the conventional concentrating film is independent of the rib. The mirror-column structure 'in this configuration, most of the light is still unable to concentrate to a positive viewing angle of about ±35 degrees. For example, the light rays 31 and 32 are not concentrated to a positive viewing angle of about ±35 degrees. It cannot be effectively utilized. Therefore, how to make the light through the concentrating film more effective has been an urgent problem for the related industry. It is known that a protective diffusion film (or an upper diffusion film) can be disposed on the concentrating film. In order to improve the above optical interference phenomenon, and prevent the concentrating film and the panel or other diaphragm from vibrating during transportation to cause mutual damage. However, the disadvantage of this method is that the cost is increased, and the backlight module is complicated. It is necessary to use protective diffusion to prevent the concentrating film from being scratched by contact with the panel. Before assembly, a protective film should also be attached to avoid damage that may occur during storage and/or transport of the concentrating film. The diffusion film and the protective ruthenium are relatively higher than the required cost. [Invention] In view of the above, the present invention provides an optical film to improve the above-mentioned shortcomings. Moreover, the scratch caused by the contact between the optical film and other film or panel can be avoided, thereby eliminating the cost of the upper diffusion film or the protective film. The optical film is provided by the invention of 12B054.doc 1352827. Including a substrate and a microstructure layer on a surface of the substrate, wherein the microstructure layer comprises one or more first regions, the first region comprising at least one multimodal columnar structure, the multimodal column And a '" structure consisting of a union structure formed by overlapping at least two columnar structures and a maximum height of the multi-peak columnar structure is an arcuate columnar structure; and the microstructure layer includes one as needed Or a plurality of second regions, the second region comprising at least one unimodal columnar structure. [Embodiment] Herein, the multimodal columnar structure refers to a union formed by overlapping at least two columnar structures with each other. The height of the valley line between any two adjacent columnar structures is between 3% and 95% of the height of the lower of the two adjacent columnar structures. In the present context, the term "peak-column-like column structure" refers to a structure composed of a single prism-column structure and having only a single-peak structure. The valley line between the single-peak prism columnar structure and its adjacent columnar structure The height is 〇% to 29.9% of the height of the lower one of the unimodal columnar structure and its adjacent columnar structure. When the height of the valley line between the adjacent two columnar structures falls within the above range, in the present invention, the two columnar structures are each regarded as a unimodal columnar structure. As used herein, valley line refers to a line formed by the adjacent sides of adjacent two columnar structures. As used herein, the height of the columnar structure refers to the vertical distance of the peak of the columnar structure relative to the bottom of the columnar structure. In this context, the height of the valley line refers to the vertical distance of the valley line relative to the two adjacent columns 128054.doc -8. 1352827. The width of the columnar structure refers to the valley between the two adjacent columns. The distance. The columnar structure used in the present invention is the technical subject of the present invention, and is well known to those skilled in the art, and is formed by two inclined planes which are formed by two oblique planes intersecting at the top of the crucible. The peaks may each form a valley with a further inclined surface of the wood-like columnar structure at the bottom. ,

The curved columnar structure used in the present invention is well known to those of ordinary skill in the art to which the present invention is composed of two inclined planes, the intersection of the tops of the two inclined planes being passivated to form a curved surface and The two inclined planes may each have an additional inclined surface to the bottom of the adjacent columnar structure: the intersection forms a valley. In this context, the highest point of the top surface of the curved columnar structure is defined as the peak of the curved columnar structure, and the height of the curved columnar structure refers to the vertical distance of the peak of the curved columnar structure relative to the bottom thereof.

In contrast to the two sides of the columnar structure, the angle at which the arcuate columnar structures extend perpendicular to the inclined plane is defined as the apex angle of the arcuate columnar structure. The substrate used in the optical film of the present invention may be any one known to those skilled in the art to which the present invention pertains, such as glass or plastic. The above plastic substrate is not particularly limited 'for example, but not limited to, a polyester resin such as polyethylene terephthalate (PET) or ethyl phthalate (1). Polyethylene naphthalate, PEN); p〇iyacryiate resin, such as polymethyl methacrylate (PMMA); polyolefin resin 128054.doc 1352827 (polyolefin resin), such as polyethylene ( PE) or polypropylene (pp); polystyrene resin; polycyclic olefin resin (p〇丨ycycI〇〇iefin resin), polystyrene resin (p〇iyjmide resin); polycarbonate resin ( Polycarbonate resin; p〇lyurethane resin; triacetate ceuui〇se (TAC); polylactic acid; or a mixture thereof. Preferably, polyethylene terephthalate, Sa, polymethyl propyl ketone, polyglycol resin, cellulose triacetate, polylactic acid or a mixture thereof is more preferably polyethylene terephthalate. The thickness of the substrate will generally depend on the desired optical product requirements, preferably between about 50 microns and about 300 microns. The microstructure layer of the optical film of the present invention may be composed of any resin having a refractive index greater than that of air. In general, the higher the refractive index, the better the effect. The resin used to form the microstructured layer is well known to those skilled in the art, for example, a thermosetting resin or an ultraviolet curable resin, preferably an ultraviolet curable resin. A monomer which can be used to constitute the above ultraviolet curable resin is, for example but not limited to, an acrylate monomer. The types of the above acrylate monomers are, for example but not limited to, acrylate, methacrylate, urethane acrylate, py ster acrylate, cyclopropyl acrylate (ep) 〇xy acryiate) or a mixture thereof, preferably propionate or methacrylate. Further, the above acrylic monomer may have a -functional group, preferably a polyfunctional group. Examples of the acrylic acid vinegar monomer suitable for use in the present invention, for example, include self-contained (mercapto)acrylic acid, tripropylene glycol based propylene (four) (caffe, coffee, 01 di (meth) aCryl, Μ- Butanediol di(meth)acrylic acid brewing 128054.doc 1352827

(l,4-butanediol di(meth)acrylate), 1,6-hexanediol di(meth)acrylate S (l,6-hexanediol di(meth)acrylate), polyethylene glycol di(meth) Polyglycol di(meth) acrylate, allylated cyclohexyl di(meth)acrylate, bis(indenyl) acrylate Isocyanurate di(meth)acrylate, 2-phenoxyl ethyl (meth)acrylate, ethoxylated trimethoprim (three) Ethoxylated trimethylol propane tri(meth) acrylate, propoxylated glycerol tri(meth)acrylate, trimethyl methacrylate tris(methyl) ) Trimethylol propane tri(meth)acrylate, 2-(p-isopropyl-phenoxy)-ethyl propyl acrylate (CPA) and their a group of mixtures.

Examples of commercially available acrylic acid S-type monomers include those manufactured by Sartomer under the trade names SR454®, SR494®, SR9020®, SR9021® or SR9041®; manufactured by Eternal under the trade names 624-100®, EM210 ® or EM2108®; and manufactured by UCB under the trade name Ebecryl 600®, Ebecryl 830®, Ebecryl 3605® or Ebecryl 6700®, etc. The above-mentioned resin forming the microstructured layer may be added with any conventional additives such as light. Starting materials, crosslinking agents, inorganic fine particles, leveling agents, antifoaming agents or antistatic agents, and the like, are well known to those of ordinary skill in the art to which the present invention pertains. An antistatic agent, 128054.doc 1352827, may be added to the resin used to form the microstructure layer as needed to provide an antistatic effect to the resulting optical film, thereby improving work yield. Antistatic agents useful in the present invention are well known to those of ordinary skill in the art to which the present invention pertains, for example, but not limited to, ethoxylated glycerol fatty acid esters, quaternary amine compounds, fatty amine derivatives, rings An oxyresin (such as polyethylene oxide), a siloxane or other alcohol derivative (such as a polyethanol ester or a polyethylene glycol ether). The photoinitiator which can be used in the present invention generates a free radical upon irradiation with light, and initiates a polymerization reaction by the transfer of a radical. Photoinitiators suitable for use in the present invention are well known to those of ordinary skill in the art to which the present invention pertains, for example, but not limited to, benzophenone, benzoin, 2 _2•2-hydroxy-2-methyl-l-phenyl-propan-l-one, 2,2-dimethoxy-1,2-diphenylethanone (2 , 2_dimeth〇xy l, 2_diphenyeth grabs small one), 1-hydroxycyclohexyl phenyl ketone oxime... ketone), 2,4,6·trimethylbenzhydryldiphenylphosphine oxide (2,4 , 6_ trimethylbenzoyl diphenyl phosphine oxide), or a mixture of them. Preferably, the photoinitiator is diphenyl Tketone or hydroxycyclohexylphenyl to promote the microstructure of the microstructure layer, Φτ phase Φ Φ Di also nt..

The ruthenium, zinc oxide or a mixture thereof Q is preferably titanium dioxide or dioxide. The above inorganic microparticles have a particle size of about 0,01 micrometers to 128,054.doc 12 1352827 and about 100 micrometers. The microstructure of the present invention comprises one or more first regions, each of which comprises 3 to J-type Tama A columnar structure consisting of a union structure formed by overlapping at least two other structures and an arcuate columnar structure at a maximum height in the multi-porous columnar structure. When the microstructure layer of the present invention comprises a plurality of first regions, the first regions may be the same or different. The adjacent side faces of the adjacent two columnar structures in the above-mentioned multi-bee columnar structure are connected to form a valley line, and the height of the valley line is the height of the phase (4) columnar structure is lower than the height of the height of the column ► 95% It is preferably from 30% to 85%, more preferably from 45% to 80%. Preferably, the multimodal columnar structure is composed of a columnar structure selected from the group consisting of an arcuate columnar structure, a prismatic columnar structure, and a mixture thereof, and the columnar structures may be of equal height or unequal height, Isometric or unequal width. The above multi-peak columnar structure is preferably composed of two or more arc-shaped columnar structures, and the superior system is composed of two curved columns having the same height, width, apex angle and radius of curvature. Structured. _ _ The present invention can effectively utilize the light that cannot be effectively utilized on both sides when the conventional technique uses a single-稜鏡 columnar structure or a single curved columnar structure by using the multi-peak columnar structure of the first region. . As shown in FIG. 4 or 5, when a single columnar structure or a single arcuate columnar structure is used, the light of the light 31 is effectively used, and if it is modified into a multimodal columnar structure as in the present invention, Then, the light exiting position of the original light ray 31 can be adjusted to the light exiting position of the light ray 41 or 51, so that the light ray β can be effectively utilized. Further, those skilled in the art to which the present invention pertains generally expect the resistance of the curved columnar structure. Preferably, the light collecting effect is poor, and the present invention can improve the scratch resistance of the optical film by designing a multi-peak columnar structure composed of an arc having a maximum height of 128,054.doc -13. 1352827-shaped columnar structure. Since the multimodal columnar structure has more than two peaks at a fixed distance from the claw to 200 μm, the light collecting effect can be improved, and the shortcoming effect of the light collecting effect when only the curved columnar structure is used is improved. In order to further enhance the brightness of the optical film as a whole, the microstructure layer of the present invention may optionally include - or a plurality of second regions each comprising at least one unimodal 稜鏡 columnar structure ^ when the microstructure layer of the present invention comprises When the plurality of second regions are different, the second regions may be the same or different; in addition, if the second region includes two or more single-peak columnar structures, the single-peak columnar structures may wait High or not equal height, equal width or unequal width. Preferably, the second region comprises two or more (five) or more unimodal prism columns, and more preferably two or more unimodal columnar structures having the same height, width and apex angle. When the microstructure layer of the present invention includes both the first region and the second region, the maximum height of the multi-peak columnar structure of the first region is the maximum of the multi-peak columnar structure of the H region formed by the curved columnar structure. The height is greater than the maximum height of the single-peak columnar structure of the second region. Thereby, it is possible to effectively prevent the sharp corners of the columnar structures in the first region and the second region of the microstructure layer from being damaged by contact with other optical rafts or panels. According to the present invention, the columnar structure and the curved columnar structure of the multimodal columnar structure constituting the __ region and the unimodal columnar structure of the second region are preferably symmetrical columnar structures. . The use of a symmetrical columnar structure not only simplifies the processing method but also makes it easier to control the collection effect. The height of the columnar or curved columnar structure used in the present invention is 128054.doc • H· 1352827 决 = the demand for the desired optical product, generally ranging from 5 micrometers to ι 〇〇 micrometers' It is preferably in the range of from 1 μm to 5 μm, more preferably in the range of from 2 μm to 40 μm. The curvature of the curved columnar top surface used in the present invention is between 2 micrometers and 5 micrometers, preferably between 5 micrometers and 35 micrometers, more preferably between 5 micrometers and 2 micrometers. . The apex angles of the prismatic columnar members or the segmented columnar structures used in the present invention may be the same or different from each other, and are 〇4〇. To 12 baht. Preferably, it is between 6 inches. to. In order to achieve both high resistance and high luminance characteristics, the apex angle of the columnar structure is preferably 80. To 95. The angle of the apex angle of the curved columnar structure is between. to%. . According to a preferred embodiment of the present invention, the microstructure layer of the present invention comprises a first region comprising at least one multimodal columnar structure, the multimodal columnar structure being composed of two arcuate columnar structures A union structure formed by overlapping each other; and the microstructure layer comprises a second region comprising at least one unimodal columnar structure. When the microstructure layer of the present invention comprises two or more different first regions: X1, X2, X3, ...), the first regions may be arranged in any suitable order, that is, may be a random structure. The arrangement is, for example, but not limited to, X丨X丨X2X1X2X丨, XiX2X1X1x2, etc.; or a repeating structure, such as but not limited to: X1X2X1X2X1X2, X1X1X2X1X1X2 4. When the microstructure layer of the present invention simultaneously includes one or more first regions that are the same or different and one or more second regions that are the same or different, the first region (X) and the second region in the microstructure layer ( y) may be arranged in any suitable order, that is, may be a random structure, such as but not limited to: xxyxyx, xyxxy, etc.; or a repeating structure, the arrangement side 128054.doc • 15· 1352827 For example but not limited to: xyxyxy, xxyxxy, etc. The microstructure layer of the present invention preferably comprises a repeating structure composed of a first region and a second region, more preferably a repeating structure composed of a plurality of identical first regions and a plurality of identical second regions. The ratio of the width of the first region to the width of the second region is from 0.1 to 10, preferably from 〇 5 to 3, more preferably from 1 to 13. In general, if the ratio of the width of the first region to the width of the second region is less than 0.1, the overall scratch resistance of the optical film is relatively poor. The construction of the microstructure layer of the optical film of the present invention is exemplified by the following description, and is not intended to limit the scope of the present invention. Any modifications and changes that may be readily made by anyone familiar with the art are included in the disclosure of this specification. As shown in FIG. 6a to FIG. 12, the optical film of the present invention is formed on the surface of the substrate 3 to form microstructure layers 310, 410, 510, 610, 710, 810 and 91, and the microstructure layer can be formed. For the preparation of the substrate together with the substrate; or by any conventional method, such as coating or embossing to form a microstructure layer on the substrate, or coating and re-engraving structure. In the embodiment of Figures 6a and 6b, the first region comprises a multi-peak columnar structure 320, which is a combination structure formed by two equal-curved arc-shaped columnar structures 32〇& and 32 ribs overlapping each other. The height h丨 of the valley line between the curved columnar structures 32〇a&32〇b is 60/ of the height of the curved columnar structures 32〇a and 32〇b. The second region may comprise a unimodal columnar structure 340 of equal height and equal width as shown in FIG. 63, or a unimodal columnar structure 340 of two equal heights and equal width as shown in FIG. 6b. . 128054.doc • 16 · 1352827 In the embodiment of Figure 7, the first region comprises a multimodal columnar structure 42〇, which is composed of three equal heights (the arc-shaped columnar structure 42高度a, 42〇 with a height of HO) a combination structure formed by overlapping b and 420c, wherein a height h of the curved columnar structure and the valley line between 420b is 50% of Η2, and a height h of the valley line between the curved columnar structures 42〇b and 420c It is also 50°/Hz; the second region comprises a single-peak prism columnar structure 440 or more than two single-peak columnar structures (as shown on the right side of Figure 7, the second area can contain three The single-peak columnar structure) is a columnar structure of unequal height but equal width. In the embodiment of FIG. 8, the first region comprises a multi-peak column structure 52. The crucible includes a multimodal columnar structure 521, wherein the multimodal columnar structure 52 is a union structure formed by overlapping two arcuate columnar structures 520a and 520b of unequal heights, an arcuate columnar structure 520a and The lower height of 520b is 52〇a, the height is Η*, and the height of the valley line between the curved columnar structures 52〇a and 520b is 55. The peak-column structure 521 is a union structure formed by two arc-shaped columnar structures 521a and 52 lb having unequal heights overlapping each other. The lower height of the arc-shaped columnar structures 521a and 521b is 521b, and the height thereof is 521b. For h5, the height hs of the valley line between the curved columnar structures 521a and 52 lb is 65% of Hs; the second region contains a single-peak 稜鏡枉-like structure or contains more than two unimodal 稜鏡 columnar structures In the embodiment of Figure 9, the first region comprises a multimodal columnar structure 620 consisting of two equal heights (1^6 height) of the columnar structures 62〇3 and 620 (; and a height The height of the valley line between the columnar structure 620a and the curved column structure 128054.doc • 17· 1352827 620b is greater than the height of the valley line 620b of the prismatic column structure overlapping each other. For the 62°/., the height h7 of the valley line between the columnar structure 620c and the curved columnar structure 620b is also 62% of the 幵6; the second area includes the enthalpy of equal height but not equal width. The single-peak columnar structure is 64〇. In the embodiment of Fig. 10, the first region comprises a multi-peak columnar structure 720, which is formed by an arcuate columnar shape. The combination structure 720a and a prism columnar structure 720b overlap each other, the height of the arcuate columnar structure 72〇& is greater than the height of the columnar structure 720b, and the height of the columnar structure 72〇b is Us The height 1!8 of the valley line between the curved columnar structure 720a and the prismatic dome structure 720b is 45 s of Hs. The second area includes a unipolar 稜鏡 columnar structure 740 of unequal height and unequal width. And 741. In the embodiment of Fig. 11, the first region comprises a multimodal columnar structure 82〇 or comprises a multimodal columnar structure 821. The multimodal columnar structure 820 is composed of two unequal height columnar structures. 820a and 820c and a joint structure formed by overlapping arc-shaped columnar structures 820b having a height greater than the meandering structures, wherein the height of the valley line between the columnar structure 820a and the curved columnar structure 820b Hs> is 67% of the height H9 of the prism columnar structure 820a, and the height of the valley line between the prismatic dome structure 820c and the curved weight structure 82〇b is the height of the columnar structure 820c. 58%, multi-peak columnar structure 821 is composed of two equal heights (degrees of Ηη) curved columnar structures 82la and 82lb The union structure formed by the overlaps wherein the height of the valley line between the arcuate columnar structures 821a and 821b is 60% of Hu; the second region comprises at least one unimodal prism columnar structure 840, and two 稜鏡The columnar structures 840 can be of equal height or unequal height, equal width or unequal width. In the embodiment of Fig. 12, the first region includes a multimodal columnar structure 92〇, 128054.doc -18 · 1352827, which is a combination of two equal south arcuate columnar structures 920a and 920b overlapping each other. The structure 'where the valley hull hu between the curved columnar structures 920a and 920b is 58% of the height %2 of the arcuate columnar structure 92〇a &92〇b; the second region contains two equal heights and the like The width of the single-peak columnar structure 940 and 941 'where the height of the valley line between the uniaxial columnar structures 940 and 941 is 1^3 is 22% of the height H13 of the unipolar prism columnar structure 940 and 941 . Figure 13 is a plan view showing an embodiment of an optical film of the present invention, wherein the multi-peak columnar structure of the first region and the unimodal prism columnar structure of the second region are linearly extending inspection structures. The columnar structure of the present invention is not limited to a columnar structure extending in a straight line, and may be a columnar structure extending in a curve (as shown in Fig. 14) or a line extending. Further, the peak heights of the columnar structures may not vary in the direction of extension, but may vary regularly or irregularly along the direction of extension. If the peak height of the columnar structure is to be changed regularly or irregularly along the extending direction, it may be manufactured by integral molding, or the columnar structure having a peak height which does not change along the extension direction may be manufactured first, and then The secondary processing is performed such that the peak height of the columnar structure changes regularly or irregularly along the extending direction. Further, in addition to the two inclined planes which may be used to form the columnar structure or the curved columnar structure of the present invention as previously described herein, two inclined curved surfaces extending in the extending direction may be used to constitute the edge. The mirror columnar structure or the arcuate columnar structure' and the radius of curvature of the inclined surfaces may each change regularly or irregularly along the direction in which they extend. According to the present invention, the columnar structures of the multimodal columnar structure constituting the first region and the unimodal columnar structure of the second region may be parallel or non-parallel to each other, and are not parallel to each other. The structure may be in the form of 128054.doc -19-1352827 which has intersected or not intersected.

The optical properties of the film are affected by the hardness of the I and the scratching of the surface of the substrate. The layer is formed on the other surface of the substrate relative to the microstructure layer as needed. The above-mentioned scratch resistance can be smooth or non-smooth, for example: fine uneven structure. The anti-layer of the present invention may be formed by any conventional method, such as, but not limited to, screen printing, spraying, (iv) twisting or coating a surface of a substrate with a scratch-resistant layer containing diffusion particles, etc., wherein the coating contains diffusion The anti-scratch layer of the particles provides some degree of light diffusion to the scratch resistant layer. The thickness of the above-mentioned anti-layer is preferably between 5G micrometers, more preferably between i and meters. According to the present invention, it is preferred to apply a hard cover liquid comprising a diffusion particle and at least one resin selected from the group consisting of an ultraviolet curable resin, a thermosetting resin, a thermoplastic resin, and a mixture thereof on a substrate, and if necessary, Thermal curing, ultraviolet curing, or heating and ultraviolet double curing to form a scratch-resistant layer, and thereby making the scratch-resistant layer have a textured structure. The amount of the above diffusion particles is 0.1 to 10% by weight based on the total weight of the resin component in the hard coat liquid.

Ultraviolet-curing resins useful in the scratch-resistant layer of the present invention are as previously described herein, which may optionally include oligomers having a molecular weight of from about 1 to about 3 to about 104. Such oligomeric systems are familiar to those skilled in the art. Well known, for example, acrylate oligomers such as, but not limited to, urethane acrylates such as aliphatic urethane acrylate, aliphatic amine decanoic acid Aiiphatic urethane hexaacrylate and aromatic urethane hexaacrylate; epoxy acrylate such as bisphenol 128054.doc -20-1352827 A epoxy diacrylate (bisphenol- A epoxy diacrylate) and novolac epoxy acrylate; polyester acrylate such as polyester diacrylate; or pure acrylate.

Thermosetting resins useful in the present invention generally have an average molecular weight of between about 104 and about 2 x 106, preferably between about 2 x 104 and about 3 x 10 , more preferably between about 4 x 104 and about 105. The thermosetting resin of the present invention may be selected from polyester resins containing hydroxyl groups (-0H) and/or carboxyl groups (-COOH), epoxy resins, polymethacrylate resins, polyacrylate resins, polyamine resins, and fluorin. The group consisting of a resin, a polyimide resin, a polyamine phthalate resin, an alkyd resin, and a mixture thereof preferably contains a hydroxyl group (-OH) and/or a carboxyl group (-C00H). A polyacrylic acid or a polyacrylate resin such as a polyacrylonitrile polyol resin. The thermoplastic resin usable in the scratch-resistant layer of the present invention may be selected from the group consisting of polyester resins; polymethacrylate resins such as polymethyl methacrylate (ρμμα); and mixtures thereof.

The diffusion particles which can be used in the scratch-resistant layer of the present invention are not particularly limited and are known to those skilled in the art to which the present invention is known, and may be organic particles such as (meth) propylene (tetra) resin, urethane resin. And (4) a resin or a mixture thereof; or an inorganic particle such as zinc oxide, cerium oxide, titanium dioxide, oxidized oxidized, alumina, sulphur, zinc sulphate, barium sulphate or a mixture thereof, or a combination of the two. Preferably + - > The particles are organic particles. The shape of the above-mentioned expanded particles is not particularly limited. For example, J is a spherical shape, a rhombic shape, etc., and the bean particle size is preferably from 1 to 30 μm. The anti-layer of the present invention may optionally contain any additives known to those skilled in the art, such as, but not limited to, antistatic agents, photoinitiators, leveling agents, and the like. A wet turbid agent, a dispersing agent or inorganic fine particles. Examples of antistatic agents, photoinitiators and inorganic microparticles suitable for use in the present invention are as previously described herein. The anti-layer of the optical film of the invention has good antistatic property and high hardness property, and its surface resistivity is between ιο\1〇13ω/〇, (9) mouth represents ohm/m square) and is measured by the JIS Κ5400 standard method. , its pen hardness can reach 3Η

Or above, and measured according to JIS Κ 7136 standard method, having ι〇% to combustion haze. The order of preparing the microstructure layer and the scratch-resistant layer of the optical film of the present invention by any conventional method and preparing the microstructure layer and the scratch-resistant layer is not particularly limited. The microstructure layer of the optical film of the present invention can be produced in any manner known to those of ordinary skill in the art to which the present invention pertains, for example, by a method comprising the steps of: (a) termifying the resin and appropriate additives as < α to form a colloidal coating composition; to be engraved on the drum by controlling the diamond tool stone tool in the rotation of the diamond tool (b) on a rounded blank (or drum), on the drum The moving mobility of the transverse direction and/or the rotational speed of the drum causes a specific groove to be drilled, and then the thermal coating or heat is applied to the substrate or the roller (8). The engraved cylinder is subjected to roller embossing to form the structured surface; and 128054.doc -22- 1352827 (d) the coating is irradiated with energy rays or heat or both to make the coating The layer is cured. The anti-layer of the optical film of the present invention can be produced in any manner known to those skilled in the art to which the present invention pertains, for example, by coating a coating composition comprising particles, a resin and an optional additive on a substrate to form a coating. The layer is then irradiated with energy rays or heat or both to cure the coating. The following examples are intended to be illustrative of the invention and are not intended to limit the scope of the invention. Modifications and variations that may be readily made by those skilled in the art are included within the scope of the disclosure of the present disclosure and the scope of the appended claims. Preparation of Glue A 60 g of EM210® (2-phenylmercaptoethyl acrylate, sold by Eternai) and 60 g of 624-l〇〇® (epoxy acrylate, sold by Eternai & Mixing ' Then add 5 grams of Chivacure® BP as a photoinitiator (benzophenone, supplied by Double Bond Chemicals) at 5 ° C and 1 rpm to form a glue A. The preparation of the glue B is a solvent (40 g of toluene), an acrylate monomer (1 gram of dipentaerythritol hexapropylene acid Sa, 2 gram of dimethicone tripropylene acid, and a gram of quaternary Alcohol diacrylate, aggregator (28 g of aliphatic urethane hexaacrylate [Eterxure 6145-100, Eternal]) and photoinitiator (6 g of hydroxycyclohexyl phenyl) The mixture was mixed at a high speed to prepare a resin formulation B' having a solid content of about 6% by weight and a total weight of about 100 grams. Solvent (27 g of benzene, 13.5 g of butyl hydrazine), 克. 5 g of acrylic granules 128054.doc -23· 1352827 [SSX-108, Japan Sekisui Chemical Co., Ltd.; average particle size of 8 μιη], 40 g of resin Formula Β', thermosetting resin (20 g acrylate resin [Eterac 7365-S-30, Eternal] (solid content about 3%)) and 2 g antistatic agent [(}^1 ugly-36M-AS, Marubishi Oil Chem. Co" Ltd] (about 20% solids) forms a gum B (about 3 % solids).

Mould roller engraving C will be precision roller surface electric clock electroless nickel or oxygen-free copper, with CNC ultra-precision precision lathe with tool positioning instrument, and single crystal diamond knife with different r value and angle, lathe rotation speed below 500 rpm, feed rate The upper limit value is 〇.〇15 mm. Write the numerical control (NC) program according to the set pattern. Use the required diamond knife, and with the aid of the tool positioning instrument, change the tool at the appropriate time to prepare the desired surface on the roller surface. The structural groove is used as a mold for subsequent processing. As described herein before, the order of preparing the microstructured layer and the scratch-resistant layer is not particularly limited, and the preparation method is as follows. Preparation of Microstructure Layer The glue A was coated on a polyethylene terephthalate (PET) substrate [A4300®, TOYOBO; thickness 188 μηι] to form a coating, which was then engraved by a mold roller. The roller of the microstructured groove obtained by the method of C forms an structured surface on the coating by embossing. The coating was irradiated with an energy ray (UV lamp of 200 to 400 nm, intensity: 15 〇 to 3 〇〇 mJ/cm 2 , time: 2 to 15 seconds) at room temperature to cure it. Preparation of scratch-resistant layer. Apply the glue B to the surface of the substrate with RDS applicator #3, and dry it after 1 〇〇〇c. I28054.doc •24· 1352827 After drying for 1 knives, then use uv exposure machine ( Fusi〇n uv, F600V, 6〇() W/inch, Η-type lamp source), energy ray 2〇〇mj/cm2, time · 2~i5 seconds, make it solidified, and obtain a thickness of about 5pm Floor. Embodiment 1 An optical film prepared by the above method, the microstructure comprising a repeating structure composed of a first region and a second region, wherein the first region comprises a multimodal columnar structure composed of two curved columnar structures The height of the intersecting valley line of the two columnar structures in the multi-peak curved columnar structure is about 58% of the height of the adjacent two columnar structures having a lower height; and wherein the second region comprises two single peaks Prism columnar structure. Various characteristic tests were carried out, and the results obtained by the test are shown in Tables 1, 2, 3 and 4 below. Comparative Example 1 An optical film of Comparative Example was prepared by the above preparation method, wherein the roller of the mold roller engraving C was designed such that the microstructure of the prepared optical crucible had a plurality of non-parallel and intersecting or unintersecting edges. The mirror columnar structure has a microstructure such as a commercially available concentrating film 96SM (Eternal Corporation). Various characteristic tests were carried out, and the results obtained in the test are shown in Table 1 below. Comparative Example 2 A commercially available concentrating film PTR733 (Shinhe Corporation) having a microstructure of a lens structure. Test Method A: The films of Example 1, Comparative Example 1, and Comparative Example 2 were subjected to the following tests and recorded in Tables 1 and 2.矽#存亮彦's economy/test: Using the NDH 5000W haze meter [Japan Electro-Color Co., Ltd.], measuring the haze of the sample to be tested according to JIS K7136 standard method 128054.doc • 25- 1352827 (Hz) and full light Transmittance (Tt).嵩笔硬彦 test powder: The pencil hardness of the surface of the microstructure layer of the sample to be tested was tested by a JISK-5400 method using a pencil hardness tester [Elcometer 3086, SCRATCH BOY] with a Mitsubishi pencil (2H, 3H). Extraordinary Pan Hard Friends: Using the pendulum hardness testing machine [Braive Instruments, model Pendulum Hardness Konig type], directly test the hardness and wear resistance of the microstructure layer of the sample to be tested with its prism microstructure layer, the test stroke is 60° to 30° Between, record the number of swings. When the surface hardness of the sample to be tested is harder, the number of swings of the pendulum can be more than that of the surface of the sample to be tested.硪 Sealing test powder: A 3M BEF-III-10T diaphragm (length and width 20 mmx20 mm) is attached to a 600 gram weight platform (area length and width 20 mm x 20 mm) using a linear wear tester [TABER 5750] The prism microstructure layer directly tests the heavy pressure and scratch resistance of the microstructure layer of the sample to be tested, and the test is performed at a speed of 2 inch, 10 eyele/min. Table 1 Haze Hz (%) Total light transmittance Tt (%) Pencil hardness scratch resistance test Pendulum hardness (number of swings) Example 1 94.57 24.56 3H No injury 71 Comparative Example 1 96.75 5.56 严重 Severe scratch 48 by example 1 and the results of Comparative Example 1 show that the same glue is used, but the different microstructures are engraved, and the hardness and scratch resistance of the optical film are changed. The optical film of the present invention has better hardness and heavy pressure and scratch resistance. The damage of the microstructure layer can be effectively avoided, thereby saving the cost of using the upper diffusion film and the protective film. 128054.doc •26- Table 2 Haze Hz (%) Total light transmittance Tt (%) Pencil hardness scratch resistance test pendulum hardness (number of swings) Example 1 94.57 24.56 3H No scratch 71 Comparative example 2 92.86 59.92 3H None Scratch 103 1352827 It can be seen from Table 2 that the hardness and financial ability of Example 1 and Comparative Example 2 are similar. Further, the optical films of Example 1 and Comparative Example 2 were subjected to the following tests to compare their luminance gain effects. Test Method B: Brightness test: The film of Example 1 and Comparative Example 2 and the diffusion film [DI-780A and DI-600A] produced by Eternal Co., Ltd. were combined with a backlight to form various modules for luminance analysis. Backlight 1 : Based on a direct-lit backlight of 10 cm square, the structure is such that four straight-tube type cold cathode tubes (CCFLs) are placed on the anti-UV reflective film, and a 2 mm diffuser plate is placed to homogenize the light source. Backlight 2: Based on the 17" side backlight, the structure is such that the reflector and the cold cathode lamp (CCFL) are placed on the reflective film on both sides of the light guide plate and the light guide plate. Using a luminance meter [Topcon, SC-777] measures the luminance value of the backlight and the module to be tested (Brightness; unit: cd/m2) at a distance of 50 cm from the backlight directly above the backlight (0 ° angle). The central luminance value of the backlight is used as the base value. The difference between the central luminance value and the base value of the module to be tested is divided by the base value and multiplied by 100%, and the module to be tested is compared with the backlight 128054. Doc •27· 1352827 luminance gain value. The results are recorded in Tables 3 and 4.

128054.doc 28- 1352827 Table 3 lOcmxlOcm direct-type backlight, forward luminance value (cd/m2) luminance gain (°/〇) backlight 1 3915.35~~ 0 month source i plus under-diffusion film (DI-780A) And a comparative example 2 film 5408.23' +38 backlight 1 plus a piece of lower diffusion film (DI-780A) and a piece of embodiment 1 film 5665.76 +45 backlight 1 plus two pieces of comparative example 2 film η 5599 +43 backlight 1 plus two pieces of embodiment 1 diaphragm 6561.08 +68 Lu 4 4"side backlighting~~ Forward luminance value (cd/m2) luminance gain (%) backlight 2 180.7 0 backlight 2 plus one piece of diffusion Film (DI-780A) and a piece of Comparative Example 2 45 456.1 +152 Backlight 2 plus one piece of lower diffusion film (DI.780A) and one piece of Example 1 film ~ 609 +237 Example 1 of Table 3 and Table 4 Comparing with the results of Comparative Example 2, it can be seen that: (1) The forward luminance value of the original 1〇cmxlO cm direct type backlight 1 is 3915.35 cd/m2, plus a piece of lower diffusion film (DI_780A) and one piece of the film of Example 1 Provides a 45% luminance gain value to achieve a luminance of 5665 76 cd/m2; however, 'backlight i plus a piece of lower diffusion film (DI_78〇A) and one slice of Comparative Example 2 are only available With a gain of 38%, the luminance reaches 5408.23 cd/m2. Therefore, the film of Example 1 of the present invention can achieve both scratch resistance and brightness. Comparing the backlight 1 with the two concentrating film modules, the luminance gain value of Example 1 of the present invention (Example 1: 68%) was significantly better than the luminance gain value (43%) of Comparative Example 2. 128054.doc -29- (2) The positive luminance value of the original 17 side backlight 2 is 18〇 7 cd/m2, plus ^ one piece of lower diffusion film (DI-780A) and one embodiment! The diaphragm provides a brightness value of 237%, which gives a luminance of 609 cd/m2; however, the original backlight 2 plus the under-diffusion film (DI-78〇A) and one piece of the comparative example 2 film can only provide 152/〇. The luminance gain value is 456.1 cd/m2. Compared with the backlight 2 and a module of the lower diffusion film (DI-780A) and a film of the comparative example 2, the film of the first embodiment of the present invention can provide a better luminance gain value" by the embodiment and the comparative example. As a result, it is understood that the optical film of the present invention has characteristics of good resistance to high luminance and high luminance. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a simplified schematic diagram of various optical films contained in a backlight module. 2 is a schematic view of a conventional concentrating film. Fig. 3 is a schematic view showing the light emission of a conventional braided structure. 4 and 5 are schematic views showing the light output of the multimodal columnar structure of the present invention. 6a through 12 are schematic views of an embodiment of an optical film of the present invention. 13 and 14 are plan views showing an embodiment of an optical film of the present invention. [Main component symbol description] 1 Reflective film 2 Light guide plate 3 Diffusion film 4,5 Concentrating film 6 Protective diffusion film 21 Substrate 22 稜鏡 Structure 128054.doc •30- 1352827

23 24 31,32,41,51 300 310, 410, 510, 610, 710, 810 320, 420, 520, 521, 620, 720, 820, 821, 920 340, 440, 540, 541, 640, 740, 741, 940, 941 320a, 3 20b, 420a, 420b, 420c, 520a, 5 20b, 521 a, 52 lb, 620b, 720a, 820b, 821a, 82 lb, 920a, 920b 620a, 620c, 720b, 820a, 820c 匕 to h13 H], H2, H4 to H6, HdH12 Valley light direction, microstructure, first layer, multi-peak columnar structure, second region, single-peak, columnar structure, arc-shaped columnar structure, columnar structure, valley line height, multi-peak column structure, two adjacent The height of the columnar structure is lower. 128054.doc 31

Claims (1)

/ Patent Application No. '097I0I276 Chinese Patent Application Version® Replacement (97 years 2 j ;) X. Patent Application Range: An optical film comprising a substrate and a structural layer, wherein The microstructure layer on one surface of the substrate comprises one or more domains, each of the first regions is 3 to >, a multimodal columnar structure, and the LD is a columnar column The structure consists of at least two columns, . The structure is formed by overlapping each other to form a ^ ^ ^ ^ ^ qing ticket structure and the maximum southness of the multi-peak columnar structure is composed of an arc-shaped columnar structure; and the microstructure layer includes one and a second region as needed. The second regions each comprise at least one unimodal columnar structure. 2. The columnar structure of the optical film of the requester, wherein the multi-column columnar structure for forming the first region is selected from the group consisting of a curved columnar structure, a prismatic columnar structure, and a mixture thereof. 3. The optical film of claim 1, wherein the multi-peak columnar structure of the first region is composed of two or more arcuate columnar structures. 4. The optical film of claim 1, wherein the microstructure layer comprises a first region and a second region, wherein a maximum height of the multi-peak columnar structure of the first region is greater than a single-peak columnar structure of the second region maximum height. 5. The optical film of claim 1, wherein adjacent sides of adjacent two columnar structures in the first region multimodal columnar structure are joined to form a valley line, and the two lines of the valley line are adjacent 30% of the height of the lower of the two columnar structures to 950/〇〇6. The optical film of the item 5, wherein the height of the valley line is adjacent to the two columns, and the height of the structure is lower. 45% to 80% of the height. 7. The optical film of claim 1 or 2, wherein the columnar structure and/or the curved column 128054-970212.d〇, 8. The height of the page structure is replaced by 3 (more) A range of 5 microns to 1 inch. The optical film of claim 2, wherein the curvature of the top of the curved columnar structure is between 2 microns and 50 microns. 9. 10 11. 12. 13. 14. 15. 16. 17. The optical film of claim 2 or 2, wherein the apex angle of the cylindrical column and/or the curved columnar structure is 40. To 120. . • The optical film of claim 9, wherein the prismatic columnar structure and/or the curved columnar structure have a apex angle of 6 〇. To 95. . Such as. The optical film of the item 1 or 2 wherein the fox-shaped columnar structure and/or the prismatic columnar structure is a symmetrical columnar structure. The optical film of claim 1, wherein the multimodal columnar structure and/or the unimodal columnar structure is a columnar structure extending in a straight line. Such as the optical film of the request, wherein the multi-column structure and the unimodal columnar structure are columnar structures extending in a curve or a fold line. The optical film of claim 1, wherein the peak height of the multimodal columnar structure and/or the unimodal columnar structure does not vary in the direction of extension. The optical film of the request, wherein the peak height of the multimodal columnar structure and/or the unimodal columnar structure changes regularly along the extending direction. The optical film of the item 1 of the above-mentioned item 1 wherein the peak height of the multimodal columnar structure and/or the unimodal columnar structure changes irregularly in the extending direction. An optical film comprising a substrate, micro on a surface of the substrate. a layer and a scratch resistant layer on the other surface of the substrate, the microstructure layer. a repeating structure comprising a first region and a second region, wherein the domain includes at least one multimodal columnar structure, and the multi-column columnar structure is formed by at least two curved columnar structures The union formed by the overlap 128054-970212.doc 1352827 One-~—— _ f%, the monthly 4th repair (more) is the replacement page adjacent to the adjacent two sides of the columnar structure to form - valley... valley line The height is 45% to 8〇% of the height of the lower two of the adjacent columnar structures; and the first region includes at least one single-peak columnar structure; the multi-peak column of the first region The maximum height of the structure is greater than the maximum height of the single-peak, columnar structure of the second region. 18. The optical film of claim 17, wherein the scratch resistant layer is smooth. 19. The optical film of claim 17 wherein the "scratch resistant layer is non-smooth. 2. The optical film of claim 19, wherein the scratch-resistant layer has a textured structure and the: diffused particles and at least one selected from the group consisting of ultraviolet curable resins, thermosets, thermoplastic resins, and mixtures thereof Resin. The optical film of claim 17, wherein the height of the columnar structure and the curved columnar structure is in the range of 5 micrometers to 100 micrometers. 22. The optical film of claim 17, wherein the curvature half of the top of the curved columnar structure is between 2 microns and 50 microns. The optical film of claim 17, wherein the apex angle of the columnar structure and the curved columnar structure is 60. To 95. . 24. The optical enthalpy of claim 17, wherein the arcuate columnar structure and the columnar structure are symmetric columnar structures. 25. The optical film of claim 17, wherein the arcuate columnar structures have the same height 'width, apex angle, and radius of curvature. 26. The optical film of claim 17, wherein the repeating structure is interlaced by the first region and the second region. 27. The optical film of claim 1 or 17, wherein the substrate is selected from the group consisting of Benzene 128054-970212.doc 1352827 Month ~ Japanese repair (more) is replacing the group consisting of ethylene diacetate, polymethyl methacrylate, polycycloolefin resin, cellulose triacetate, polylactic acid and mixtures thereof group. 128054-970212.doc 4 1352827 • Patent application No. 097101276 Chinese image replacement page (February 1997) XI. Schema: Repair (more) replacement page 128054-970212-fig.doc 1352827 128054-fig.doc 1352827 320 320 320a 320b 320a 320b Fly ►310 ►3(10) Figure 6a 320 320a 320b 320a 320b 卜 310 卜300 128054-fig.doc 1352827 420 ,-κ-^ 420a 420b 420c 30C I28054-fig.doc -4- 1352827 620 people >610 300 720 -Λ_ ,710 -300 128054-fig.doc 8201352827 J> 821 ►810 卜300 920 t-A-s 920a 920b 920 ,~^N 920a 920b • 910 •300 128054-fig.doc 6- 1352827 128054-fig.doc