TWI339279B - Optical concentrator without protective film - Google Patents

Description

1339279 IX. Description of the Invention: [Technical Field] The present invention relates to a light collecting element, and more particularly to an optical light collecting element which can be applied to a liquid crystal display. 4 [Prior Art] • In general, the main structure of a liquid crystal display ("LCD") consists of two parts: a panel and a backlight module. The panel part includes a transparent electrode, a liquid crystal, an alignment film, and color filter. The components of the backlight module include a lamp tube, a light guide plate, and various optical films, etc. The purpose of the backlight module is mainly to provide a light source required for the liquid crystal display. In order to improve the brightness of the liquid crystal display, reduce the heat accumulation and reduce the energy loss of the light source, the most commonly used method in the industry is to use a variety of light collecting elements in the backlight module, such as the brightness enhancement mode developed by 3M (Brightness Enhancement) Film, BEF) or prism film, which is used to harden a special acrylic resin into a fine crucible structure on a polyester optical film having a thickness of only 25 to 250 μm. The most important function of the light collecting element is to collect the scattered light from the light guide plate by refracting and internal total reflection: the plate is scattered to all directions, and concentrated to a positive angle of about ±35 degrees. 〇n-axis) direction to increase the brightness of the LCD. However, at present, the light collecting components still encounter some problems in actual use. For example, as shown in FIG. 1 , the light collecting element 10 has a concentrating structure 12 on the upper surface of the substrate, and if the surface of the concentrating structure 12 is not subjected to any protection treatment, during the subsequent transport or It is easy to cut during the cutting process. 134326.doc 1339279 Scratches or abrasions due to carelessness, which will affect the optical effect of the light collecting elements. In the current general solution of the industry, as shown in FIG. 2, a protective film M is attached to the concentrating structure 12 on the upper surface of the substrate, and a protective film under the layer is attached to the lower surface of the substrate to prevent To the injury, but this method has the disadvantage of increasing costs and complicated processes. In addition, there is also a hard mask layer (hard eQating) on the other side of the concentrating structure coated-layer having a relief structure 9

In the manner or as shown in Fig. 3a, the method can protect the lower surface of the substrate from being damaged by the concentrating structure 12, but the concentrating structure body is destroyed 5 (see Fig. 3b), thereby affecting the optical effect. SUMMARY OF THE INVENTION The present invention provides a light collecting element, which can achieve the effect of preventing the abrasion resistance of the upper and lower surfaces of the light collecting element in a specific range β by controlling the above-mentioned disadvantages, and can maintain the good effect without being attached with a protective film. Brightness.

A light collecting element comprising (a) a base surface of the first surface having a condensed junction. The main object of the invention is to provide a material; (b) a first surface on one side of the substrate: and (c) a base The second surface of the other side of the material, wherein the maximum static coefficient of friction between the first surface and the first surface is measured between about 0.3 and 0.7 according to the K7 (2) standard method. The descriptions used herein are merely illustrative of the described embodiments and are not intended to limit the scope of the invention. For example, the use of "-" in the specification, unless the context clearly dictates otherwise, the term "a" is used in the singular and plural. 134326.doc 1339279 "In the present invention, a columnar structure refers to a multi-material structure or a single-peak columnar structure, and a columnar structure" means a union structure in which at least two columnar structures overlap each other, and The height two of any two adjacent columnar structures. ... 30% to the height of the lower height of the adjacent columnar structure to only the right: the peak columnar structure refers to a structure composed of a single columnar structure and having only the first peak. In this context, the mirror columnar structure is composed of two inclined surfaces which may be curved or planar, and the two inclined surfaces intersect at the top of the crucible to form a peak ' and may be separately from the adjacent columnar structure An inclined surface intersects at the bottom to form a valley. In this paper, the '(nine)-shaped columnar structure) is composed of two inclined planes, and the intersection of the tops of the two inclined planes is passivated to form a curved surface, and the two inclined planes are separated from the other inclined surfaces of the adjacent columnar structures. Cross formation. — In this paper, “linear columnar structure” is defined as a columnar structure in which the ridges of the columnar structure extend in a straight line. As used herein, a "curved columnar structure" is defined as a columnar structure in which a ridgeline of a columnar structure extends in a meandering manner, and the curvedly extending ridgeline forms an appropriate surface curvature change. The height of the curved column structure is from 2% to 1% by weight of the reference, preferably from 1% to 2% by weight based on the height of the columnar structure of the ° curve. In this paper, 'pencil hardness' means that the surface of the sample to be tested is a flat surface, measured by the standard method of m κ_·, and the hardness measured. I34326.doc 1339279 The collection of light 7C pieces of this month includes a substrate; the substrate has a first surface = a second surface, in order to avoid the two light collecting elements are connected when the backlight module is assembled: in the light collection The component has been fabricated (4) to generate a stack*, resulting in a maximum static coefficient of friction between the first surface and the second surface of the light collecting element 1: 1 measured according to the JIS K7125 standard method, preferably between about 〇3 and 〇7. When the coefficient of friction is less than 0.3, the concentrating structure is liable to collapse and the luminance is lowered. When the coefficient is greater than 0.7, the concentrating structure is too rigid (10) yang (10), which is easy to damage the second surface of the substrate or other components. The material of the substrate may be any one of ordinary skill in the art to which the present invention pertains, such as glass or plastic. The plastic substrate may be composed of one or more polymer resin layers to form the above polymer resin layer. The kind of the resin is not particularly limited, and is, for example, selected from the group consisting of polyester resins such as polyethylene terephthalate (PET) or polyethylene naphthalate (polyethylene). Naphthalate, PEN), polyacrylate resin 'such as polymethyl methacrylate (PMMA)' polyolefin resin (p〇iy〇iefin resin), such as polyethylene (PE) or polypropylene Dilute (PP), polycyclic hydrocarbon resin (p〇iyCyCiCi〇〇iefin resin), polyimide resin, polycarbonate resin, polyamine And the like, but not limited thereto, preferably selected from the group consisting of polyester resin, polylactic acid, and polylactic acid (polylactic acid) and combinations thereof. The carbonate resin and combinations thereof; more preferably polyethylene terephthalate. The thickness of the substrate generally depends on the optical product 134326.doc, J, which is to be produced, generally 15 microns to 300 microns. In order to increase the scratch resistance, the first surface and the first surface of the substrate are not suitable to have a pencil hardness greater than HB at the same time according to the JIS K5400 standard method. In other words, the substrate has a pencil hardness of not more than a pencil hardness. The first surface of the light-collecting element of the present invention has a light collecting structure, and the light collecting structure is used to provide the desired optical properties of the light collecting element, and the form thereof is It is not particularly limited and can be prepared by any means known in the art to which the present invention pertains, for example, can be prepared together with a substrate in an integrally formed atmosphere, for example, by embossing. Or by injection, or by using a commercially available concentrating film laminate (laminati) on a substrate; or by roll-to-roll (roll t0 roU) continuous production technology on a substrate The cloth glue is solidified to form a plurality of structured surfaces capable of providing a concentrating effect. The thickness of the concentrating structure is not particularly limited, and is usually between about 1 micrometer and about 5 micrometers, preferably 5 micrometers. As far as 35 microns, preferably 15 microns to glutinous rice, the higher the refractive index of the concentrating structure, the better the luminance gain effect. Surface forming method side coating first glue according to a preferred embodiment of the present invention, the first method having the light structure is a roll-to-roll continuous production technique, after the substrate is glued The concentrating structure is formed by solidification, and the first surface having the condensing structure is formed, and has a pencil hardness of not more than ΗΒ according to the JIS κ54 standard method.

A surface, such as but not 134326.doc 1339279, is limited to forming a coating of the substrate with respect to the other side coating of the concentrating structure; or coating the substrate with respect to the concentrating structure. The side is first coated with a glue, and then a roller having a concave-convex structure on the surface is used to form a coating having a concave-convex microstructure on the glue by embossing. The thickness of the above coating layer is not particularly limited and is usually between about 〇5 and about 3 Å, preferably between about 1 and about 10 μm.

In order to impart a degree of light diffusion to the coating, a certain degree of light diffusion is produced, and the above glue may be included as a bead, such as, but not limited to, glass beads; metal oxide beads, for example, but not Restricted to titanium dioxide (Ti〇2), cerium oxide (si〇2), zinc oxide (Zn0), aluminum oxide (Αι2〇3), zirconia (ZrO 2 ) or mixtures thereof; or plastic beads such as, but not limited to, acrylic acid A vinegar resin, a styrene resin, a urethane resin, an anthrone resin or a mixture thereof is preferably an acrylate resin or an anthrone resin; or a combination thereof. The shape of the above beads is not particularly limited, and may be, for example, a spherical shape, a rhombus shape, an elliptical shape, a rice grain shape, a biconvex lens shape, or the like.

The amount is between about 丨 micrometers and (10) micrometers, and the above-mentioned bead phase = medium solid content is about 01 parts by weight to about a hundred parts by weight per 100 parts by weight of the solid portion of the glue. In the case where the (four) structure is absent on the first surface of the substrate, the haze of the coating is not less than 3%', preferably 3% to 70%, as measured by the JIS K7136 standard method. According to a preferred embodiment of the present invention, the second surface of the light collecting member is formed by a roll-to-roll continuous production technique, and the second glue containing no beads is coated on the substrate side. It is cured to form a smooth coating, and has a pencil hardness of 2b to hb measured according to the JIS K5400 standard method. 134326.doc 1339279 According to another preferred embodiment of the present invention, the second surface of the light collecting member is formed by a roll-to-roll continuous production technique of "substrate-side coating" containing plastic beads. The second glue is solidified to form a non-smooth coating, and the root; according to the JIS K5400 standard method, has a pencil hardness of H~3H2 and is measured by the JIS K7136 standard method, and the haze of the coating is 4% to 25 〇/〇. . The first glue and the second glue may be the same or different, each comprising at least one resin selected from the group consisting of an ultraviolet curing resin, a thermosetting resin, a thermoplastic resin φ, and a mixture thereof, wherein the first glue is preferably used. It is an ultraviolet curing resin; the second glue is preferably a mixture of an ultraviolet curing resin and a thermosetting resin, and is treated by heating and ultraviolet double curing, so that the formed coating has excellent heat resistance and a very small volume. Shrinkage. The first glue and/or the second glue may optionally comprise any additives known to those of ordinary skill in the art, such as, but not limited to, slip agents, diluents, inorganic fillers (for example, but not limited to, slip agents, diluents) Inorganic filler), curing agent, antistatic agent, leveling agent, stabilizer, agent, fluorescent whitening agent or ultraviolet absorber. In order to increase the lubricity after curing, the first glue and/or the second glue may be visualized. It is necessary to include a slip agent, and the slip agent suitable for use in the present invention is a phthalamide resin, an acrylate resin, a naphthenate (naphthenates). The group consisting of an anthrone resin and a fatty alcohol resin is preferably a cycloalkyl ester or an anthrone resin. Commercially available examples of such slip agents include: manufactured by Teg0 Corporation under the trade name Rad 2300. In order to avoid the molecular weight of the glue is too high, the viscosity is too large, so that the operability changes 134326.doc -12- 1339279. It is easy to apply the coating with poor leveling and other disadvantages. Add diluent to adjust the viscosity of the glue. . In addition, the addition of a thinner with a methoxyl group can 'adjust the elastic modulus of the glue after curing to make the concentrating element: the surface, the structure has better flexibility, thus increasing the wear resistance of the optical element' Sex. The above diluent is preferably an acrylate monomer, more preferably a monofunctional* acrylate monomer, and a suitable diluent such as, but not limited to, selected from the group consisting of (meth) acrylate, 2_ Phenoxyethyl acrylate (2_ Φ phenoxyi mhyi acry丨ate), 2-(2-ethoxyethoxy) Ethyl acrylate, Trimethylolpropane Triacrylate ), polyethylene glycol diacrylate, Cumyl Phenoxyl Ethyl Acrylate, Propoxylated neopentyl gly C〇l diacrylate , Eth〇xylated Trimethylolpropane Triacrylate, Propoxylated Trimethyloipropane Triacrylate, Dipentaerythritol Hexaacrylate DPHA, and the like combination. Examples of commercially available monomers include: manufactured by Eternal., under the trade names EM2108®, EM210®, EM211®, EM224®, EM23 1® and manufactured by Shin-Nakamura, under the trade name Α· LEN10 or A -BPEFA, etc. In addition, in order to avoid the optical properties caused by the collapse phenomenon of the concentrating structure, the first glue and/or the second glue may be added with an inorganic filler in the glue to avoid affecting the optical properties due to the collapse phenomenon of the concentrating structure. In addition, the inorganic filler 134326.doc 13 1339279 also has the effect of increasing the bdghtness of the liquid crystal display panel. The inorganic fillers which can be used in the present invention are well known to those skilled in the art of the present invention, such as, but not limited to, zinc oxide, cerium oxide, cerium decanoate, emulsified aldehyde, alumina, calcium carbonate. Titanium dioxide, calcium sulfate, sulfuric acid lock or a mixture thereof, preferably titanium dioxide, oxidized oxidized, oxidized stone, zinc or a mixture thereof. The above inorganic filler has a particle size of from about 1 nanometer to about 350 nanometers, preferably from about 50 nanometers to about 150 nanometers. In order to improve the cross-linking between molecules, the first sputum and/or the second glue may be added with a hardener, such as, but not limited to, isocyanate, diisocyanate (diis〇cyanate). Or polyisocyanate. Examples of the ultraviolet curable resin suitable for use in the present invention include, for example, acrylate resins, and the types of the above acrylate resins are, for example but not limited to, methacrylate resins (methacrylate). Resin, urethane acrylate resin, polyester acrylate resin, epoxy acrylate (ep〇xy acry 丨 resin or mixture thereof, preferably thiol acrylate) Ester Resin. • The thermosetting resin useful in the present invention generally has an average molecular weight of from about 1〇4 to about 2χ1〇6, preferably between about 2xl〇4 and about 3x10, more preferably about 4x10. Between about 105. The thermosetting resin of the present invention may be selected from polyester resins containing epoxy groups (-COOH) and/or hydroxyl groups (-〇H), epoxy resins, poly(meth)acrylic acids. An ester resin, a polyamide resin, a fluorocarbon resin, a polyimide resin, a polyurethane resin, an alkyd resin, and a group of 134326.doc 14 - preferably It is a poly(meth)acrylate resin containing an ester group and/or a warp group. The thermoplastic resin usable in the present invention may be selected from a polyester resin; a polymethyl propylene 8 S-day resin such as polymethyl methacrylate (PMMA); and a group of such a mixture of β-fields, when a thermosetting resin or a thermoplastic resin is used, a solvent may be added as needed. The solvent which can be used in the present invention is well known to those skilled in the art, for example, Benzene's esters or ketones or mixtures thereof. Non-limiting examples of benzene solvents include benzene, o-diphenyl, m-dioxene, p-dimethyl phthalate, dinonyl benzene or stupid ethylene or mixtures thereof Non-limiting examples of ester solvents include, for example, ethyl acetate, butyl acetate, diethyl carbonate, ethyl formate, methyl acetate, ethoxyethyl acetate, ethoxypropyl acetate or monomethylhydrazine. Propylene glycol ester or a mixture thereof. Non-limiting form of ketone solvent Including a propionate, methyl ethyl ketone or methyl isobutyl ketone or a mixture thereof. According to an embodiment of the present invention, the first glue for forming the concentrating structure of the first surface is an acrylate resin It comprises a polymerizable monomer, a crosslinking agent and a photoinitiator. Suitable polymeric monomers include, for example, epoxy diacrylate, halogenated epoxy diacrylate. ), methyl methacrylate, isobornyl acrylate, 2-phenoxy ethyl acrylate, acrylamide ), styrene, halogenated styrene, acrylic acid, (meth)acrylonitrile (meth) acrylonitrile, hydrazine derivative dipropionic acid S 134326. Doc •15- 1339279

(fluorene derivative diacrylate), biphenylepoxyethyl acrylate, polyethylene glycol o-phenylphenyl ether acrylate, halogenated phenyl phenyl epoxide (halogenated) Biphenylepoxyethyl acrylate), alkoxylated epoxy diacrylate, halogenated alkoxylated epoxy diacrylate, aliphatic urethane diacrylate , aliphatic urethane hexaacrylate, aromatic urethane hexaaerylate, bisphenol-A epoxy bisphenol-A epoxy Diacrylate), novolc epoxy acrylate, polyester acrylate, polyester diacrylate, acrylate-terminated urethane oligomer Capped urethane oligomer), or a mixture of them. Preferred polymerized single system functionalized epoxy diacrylate, methacrylate methacrylate, 2-phenoxyethyl acrylate, hydrazine derivative diacrylate, biphenyloxyethyl acrylate, aliphatic amine group Phthalate diacrylate, aliphatic urethane hexaacrylate, or aromatic urethane hexaacrylate. Examples of commercially available polymerized monomers include those manufactured by Sartomer under the trade names SR454®, SR494®, SR9020®, SR9021® or SR9041®; manufactured by Eternal under the trade names EM210®, EM2108®; by UCB The company produces 'commercial names Ebecryl 60 (^, Ebecryl 8308, Ebecryl 3605® or Ebecryl 6700®; and 134326.doc 16 1339279 produced by Shin-Nakamura Co., Ltd. under the trade name A-LEN10 or A-BPEFA, etc.) The parental agent may be a monomer or oligomer, such as a propionate vinegar having one or more functional groups, preferably a polyfunctional group, to increase the glass transition temperature. The above has one or more functional groups. The type of acrylate is well known to those of ordinary skill in the art to which the invention pertains, such as, but not limited to, (meth) acrylate; urethane acrylate, such as an aliphatic amine. Aliphatic urethane acrylate, aliphatic urethane hexaacrylate or aromatic urethane hexaa Crylate);polyester acrylate' such as polyester diacrylate, ep0Xy acrylate, such as bisphenol-A epoxy Diacrylate) '2-carbyl-3-phenoxypropylpropionic acid; a novolac epoxy acrylate; preferably a (fluorenyl) acrylate, which may have two or more A functional group, preferably a polyfunctional group. Examples of (meth) acrylates suitable for use in the present invention, such as, but not limited to, tripropylene glycol di(meth) propionate (tripropylene glycol di (meth) Acrylate), 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylic acid ,6-hexanediol di(meth)acrylate), polyethyleneglycol di(meth)acrylate, propylated di(meth)acrylic acid cyclohexene S (allylated Cyclohexyl di(meth)acrylate), di(methyl)acrylic acid isocyanuric acid vinegar-17- 134326.doc ί 1339279 (isocyanurate di(met H)acrylate), ethoxylated trimethylol propane • tri(meth)acrylate, propoxylated glycerol tris(decyl) acrylate (ethoxylated trimethylol propane • tri(meth)acrylate) Propoxylated glycerol tri(meth)acrylate), trimethylol propane tri(meth)acrylate, tris-(propyloxyethyl)isophthalic acid urea vinegar (tris) Acryloxyethyl) isocyanurate) or a mixture of these. ^ Commercially available acrylic acid useful in the present invention includes: manufactured by Sartomer under the trade names SR454®, SR494®, SR9020®, SR9021® or SR9041®; manufactured by Eternal, under the trade name 624-100 Produced by ®, 6161-10 (^; and by]^8, under the trade name of £56 (^1600®, Ebecryl 830®, Ebecryl 3605® or Ebecryl 6700®, etc. Suitable for the light start of the present invention) The agent is not particularly limited, and is a radical generated by light irradiation, and a polymerization reaction is initiated by the transfer of a radical. For example, it may be selected from a benzophenone, a benzoin, or a benzoin. Benzil, 2,2-dimethoxy-l,2-diphenylethan-l-one, 1-hydroxyl 1-hydroxy cyclohexyl phenyl ketone, 2,4,6-trimethylbenzoyl diphenyl phosphine oxide (TPO) and combinations thereof Constituting a group, preferably a second clumsy_β The above-mentioned concentrating structure form is well known to those of ordinary skill in the art to which the present invention pertains, examples thereof However, it is not limited to: regular or irregular columnar structure, conical structure, solid angle structure, orange-shaped block structure, lens 134326.doc -18. 1339279-like structure and capsule structure or a combination thereof, etc., preferably a regular columnar structure. The columnar structures may be linear (n_r), curved (serpentine) or polygonal (7) gzag), preferably linear, and adjacent linear columns may be parallel or non-parallel. The height of the peak of the structure may not change along the direction of extension or the direction of extension of the I. The peak height of the columnar structure varies along the direction of extension, meaning that at least the right gossip in the 5 columnar structure has a file position. The degree of change is random or regular along the position of the main axis of the structure. The variation of the basin 纟 纟 ή , ^ , ^ branching is at least the nominal height (or the same degree of the same spoon). It is between 5% and 50% of the nominal height. The columnar structure used in the present invention can be of equal height or unequal height, equal width or unequal width, and its height depends on the desired optical The demand for the product is generally between about! micron to about 50 micro The range between, preferably between about 5 microns and about 35 microns, more preferably between about 15 microns and (10) (four). The columnar structure of the concentrating structure of the present invention comprises at least one single peak. The columnar structure, the columnar structure of the concentrating structure of the present invention may be a fox-shaped columnar structure, a columnar structure or a mixture thereof. In order to have both high luminance and scratch resistance, the radius of curvature of the top of the orbital columnar structure is not more than 4 micrometers, preferably between 〇ι micrometers and tens of meters, and the radius of curvature of each columnar structure may be the same or not the same. The above columnar structure is preferably a symmetrical core structure, and the use of a symmetrical columnar structure not only simplifies the processing method but also facilitates the control of the light collecting effect. The prismatic or arcuate dendritic structures used in the present invention may have the same apex angles as each other or not (d), which is between about 40. To about 12 baht. Preferably, it is between about 60° and about 120°. 134326.doc -19- 1339279 When the concentrating structure of the present invention comprises two different columnar structures (for example, represented by χ丨 and X2) or two or more (for example, represented by X, x2, X3, ...) The columnar structures are multimodal columnar structures or unimodal columnar structures, and may be arranged in any suitable order 'that is, may be a random structure, such as, but not limited to, XiX, x2X, X2Xi, Qing 丨❿, etc.; may also be a repeating structure's arrangement such as but not limited to: XlX2XlX2XlX2, WX2XAX2, etc., preferably a repeating row composed of two different columnar structures

Column structure. According to a preferred embodiment of the present invention, the concentrating structure comprises a plurality of prismatic columns, the columnar structures being linear columnar structures and parallel to each other, = concentrating in the embodiment of FIG. The structure has a columnar structure of a single-peak columnar structure 41 of equal width, equal width, and the same apex angle.

According to another preferred embodiment of the present invention, the concentrating structure comprises a plurality of columnar structures, the columnar structures are linear columnar structures, and the peak heights of the partial columnar structures vary along the extending direction, as shown in FIG. Show. The columnar structure of the concentrating structure is a single-peak 柱 columnar structure of equal height, equal width, and the same apex angle. And the columnar structures comprise a unimodal linear columnar structure 34〇 (χ!) whose peak height varies along the extending direction and a unimodal linear columnar structure 330 (χ2) whose peak height does not vary along the extending direction, and the columnar structure comprises: The columnar structures are arranged in alternating repeating structures (X丨X2X1Xj. According to still another preferred embodiment of the present invention, the concentrating structure comprises a plurality of columnar structures, the columnar structures being linear columnar structures, at least The two or more columnar structures are not parallel to each other, thereby reducing the optical interference phenomenon. The mutually non-parallel columnar structures may be mutually non-parallel, and the columnar structures are not 134326.doc -20· 1339279 parallel The arcuate columnar structure, UU ^ ^ is not a lamp-like columnar structure and an arc-shaped column, and the above-mentioned non-parallel columnar structure is in the microstructure layer: it is intersected or unintersected. Form, a schematic view (top view) of a microstructured layer with mutually non-parallel brother columnar structures. As shown in Figure: Inventive light: the microstructured layer of the film may comprise columnar structures that are not parallel to each other (eg, medium (7) has Irregular columnar structure 61, not intersecting Not parallel to the columnar structure 62) and parallel to the columnar structures 63 to each other.

Figure 7 is a schematic illustration of an embodiment of the light collecting element of the present invention. The light collecting element of the present invention comprises a substrate 7〇1 and a first surface on one side of the substrate, the first surface having a plurality of columnar structures 702; and the other side of the substrate The coating 703 of the two surface coatings, wherein the contact area of the two light collecting elements is 704. The light collecting element of the present invention has a total light transmittance of not less than 6%, preferably more than _, more preferably 嶋 or (10)% or more, according to the standard method of JIS K7136. According to a preferred embodiment, the light collecting element produced by the present invention has antistatic treatment on both the first surface and the second surface, and the surface impedance thereof is less than 1〇13 ohm/m square (Ω/□). Preferably, the thickness of the light collecting element of the present invention has a high refractive index of at least 1.49, preferably a refractive index of between about 10,000 Å, which provides a good optical gain. Value; and because the coating is halogen-free, it will not pollute the environment. The light collecting elements of the present invention can be used in light source devices such as advertising light boxes, flat panel displays or coffee lighting devices, and the like, particularly in backlight modules for liquid crystal displays. The concentrating element of the invention can be prevented from being scratched during transportation or operation, and 134326.doc Λ1 1339279 is not easy to be stained with dust, and has high transparency, so the ampames of the phthalamide P can be used without 4, you can achieve the role of protection, - Cheng, complex π said a, the system of tearing the film is less::. The convenience of assembling the backlight module is greatly improved, and it is also possible to reduce the following: Embodiments will be further described with respect to the light collecting element of the present invention and its preparation. EXAMPLES Preparation of φ glue A-P The glue A-F was prepared in the manner described below, and the composition of each formulation is as listed in Table 1. First, the components were mixed in the weight ratios listed in Table 1, and further at 50. (At the temperature of 1, stirring at a speed of 1,0 〇〇卬 111 to form a colloidal polymerizable composition.

134326.doc •22· 1339279 (a): Crosslinker (produced by Changxing Company, 624-100®) (b) · Crosslinker (produced by Changxing Company, 6161-100®) (C), monomer ( A-LEN10): (d). Thinner (produced by Changxing Co., Ltd., EM210®) (e)·Diluent (produced by Changxing Company, EM2 11®) ' (1): Photoinitiator ( Produced by Ciba, 1184) (g), slip agent (produced by Teg〇, Rad 23〇〇) φ (h), thermosetting resin (produced by Changxing Co., Ltd., 7365-S-3〇) (1). Thermosetting resin ( Produced by Changxing Company, ETERFLON4267-P-50) (j). Hardener (produced by Changxing Company, N612) (k): Solvent (ethyl acetate, produced by Li Changrong Chemical Institute) (l): Beads Manufactured by the company, SSX_l〇2) Example 1 The colloidal polymerizable composition glue D was coated on a polyethylene terephthalate Φ (PET) substrate (model, manufactured by T0RAY); A smooth coating is formed, and then the coating is irradiated with UV light energy rays at room temperature to cure. An optical film having a coating having a thickness of 5 μm was obtained. - Thereafter, on the other side of the substrate, a colloidal polymerizable composition glue A is applied onto the substrate to form a coating, and then a ruthenium pattern is formed on the coating by means of a roller embossing. At the same time, the coating is irradiated with uv light energy rays to be cured. An optical film having a coating having a prism height of 25 μm was obtained. Example 2 134326.doc -23· 1339279 The colloidal polymerizable composition glue D was coated on a polyethylene terephthalate (PET) substrate (Model U34®, manufactured by TORAY Corporation) to form _ . Smoothing the coating, and then embossing using a roller having a concave-convex structure on the surface; forming a surface relief structure on the coating. The coating is simultaneously irradiated with UV light energy rays to cure. An optical film having a coating having a thickness of 5 μm was obtained. Thereafter, on the other side of the substrate, a colloidal polymerizable composition glue A is applied onto the substrate to form a coating layer, and then a ruthenium pattern is formed on the coating by a roller embossing pattern. . The coating is simultaneously irradiated with uv light energy rays to cure. An optical film having a coating having a crucible height of 25 μm was obtained. Example 3 The colloidal polymerizable composition glue D was coated on a polyethylene terephthalate (PET) substrate (Model U34®, manufactured by T〇RAY Co., Ltd.) to form a smooth coating of j. The coating is simultaneously irradiated with UV* energy rays to cure. An optical film having a coating having a thickness of 5 μm was obtained. Thereafter, on the other side of the substrate, a colloidal polymerizable composition glue B is applied onto the above substrate to form a coating, and then a ruthenium pattern is formed on the coating by means of a roller embossing. At the same time, the coating is irradiated with UV light energy rays to cure it. An optical film having a coating having a height of 25 microns was obtained. Example 4 A colloidal polymerizable composition glue F was coated on a polyethylene terephthalate (PET) substrate (Model U34®, manufactured by T〇ray Co., Ltd.) to form: surface relief coating The layer was then 'cured by UV light energy rays after drying for 100 minutes, and then cured. An optical film having a coating thickness of $134326.doc -24 - 1339279 microns is obtained. Thereafter, on the other side of the substrate, a colloidal polymerizable composition glue c is applied to the above substrate to form a coating, and then a columnar pattern is formed on the coating by roller embossing. At the same time, the coating is irradiated with UV light energy rays to cure. An optical film φ having a coating having a crucible height of 25 μm was obtained. Example 5 A colloidal polymerizable composition glue D was applied to a polyethylene terephthalate (PET) substrate (Model U34® , produced by TORAY Co., Ltd., to form a surface relief coating, while illuminating the coating with uv light energy rays at room temperature to cure. An optical film having a coating having a thickness of 5 μm was obtained. Thereafter, a colloidal polymerizable composition glue c is applied to the above substrate on the other side of the substrate to form a coating, and then a ruthenium pattern is formed on the coating by means of a roller embossing. At the same time, the coating is irradiated with uv light energy rays to cure. An optical film having a coating having a height of 25 μm was obtained. Example 6 A colloidal polymerizable composition glue E was applied to a polyethylene terephthalate (PET) substrate (Model U34®, manufactured by TORAY Corporation) to form a smooth coating. After loo c is dried for 1 minute, the coating is irradiated with uv light energy rays to cure it. An optical film having a coating having a thickness of 5 μm was obtained. Then, on the other side of the substrate, a colloidal polymerizable composition glue a is applied onto the substrate to form a coating, and then a prism is formed on the coating by means of a roller embossing; η 士^ is now mad-like. At the same time, the coating is irradiated with UV light energy rays to cure. An optical film having a coating height of 25 microns and a coating of 134326.doc • 25· 1339279 was obtained. Example 7 A colloidal polymerizable composition glue D was coated on a polyethylene terephthalate (PET) substrate (Model U34®, manufactured by T〇RAY Co., Ltd.) to form a smooth surface coating. 'At the same time, the coating is irradiated with uv light energy rays at room temperature to cure. An optical film having a coating having a thickness of 5 μm was obtained. Thereafter, on the other side of the substrate, a colloidal polymerizable composition glue A is applied onto the above substrate to form a coating, and then an arcuate columnar pattern is formed on the coating layer by means of a roller embossing. The coating is simultaneously irradiated with uv light energy rays to be cured. An optical film having a coating having a radius of curvature of 3 μm at a top of 25 μm was obtained. Comparative Example 1 A colloidal polymerizable composition glue A was applied onto a polyethylene terephthalate (PET) substrate (Model U34®, manufactured by T〇RAY Co., Ltd.) to form a coating, and then utilized. The roller embossing method forms a columnar pattern on the coating. The coating is simultaneously irradiated with UV light energy rays to cure. An optical film having a coating having a prism height of 25 μm was obtained. Comparative Example 2 A colloidal polymerizable composition glue F was applied to a polyethylene terephthalate (PET) substrate (Model U34®, manufactured by T〇RAY Co., Ltd.) to form a surface relief coating. After 10 minutes (TC drying! minutes, the coating is irradiated with uv light energy rays to cure it. An optical film having a coating thickness of 5 μm is obtained. Thereafter, the substrate is further coated on the substrate. The polymerizable composition glue A is coated on the above substrate to form a coating layer, and then embossed by a roller 134326.doc -26- 1339279 to form a columnar pattern on the coating layer. The coating can be irradiated with radiation to obtain an optical film having a coating having a height of 25 μm. Test method: • Pencil hardness test: using a pencil hardness tester [Elcometer 3086, . SCRATCH B0Y] The pencil hardness of the first and second surfaces of the sample to be tested is tested by a Mitsubishi pencil using the JIS K-5400 method, wherein the first surface is first filled with the same knee liquid and then tested, and the test results are as follows: Shown. Maximum static friction coefficient test : Using the friction coefficient test machine [TOYOSEIKI company, the system of the cohesion force test machine] with the m K7125 method, the sample size to be tested is 63 mm×63 mm 'with a test stroke of 15 mm, the test speed is 100 mm/mimite 'load 20 N 'measurement to be tested The maximum static friction coefficient (μ3) between the first surface and the second surface of the sample. The test results are shown in the following Table 2. From the resistance test: using a linear wear tester [TABER 5750] on a weight platform of 350 grams (long area) The film of the sample to be tested (length 20 mm x 20 mm) is attached to the film with a width of 20 mm x 20 mm. The first surface is condensed directly; the weight of the second surface is tested for scratch resistance to test the stroke 0,5 The cycle is 10 cycles/min for 10 cycles scratch resistance test, and then the appearance of the concentrating structure and the second surface are scratched after the test. The test results are shown in the following table 2. 134326.doc -27- 1339279 2 first surface coating / second surface coating first surface structure second surface structure first surface wrong pen hardness second surface pencil hardness maximum static friction coefficient (ps) resistant to test example 1 A/Glue D 稜鏡 Columnar smooth Η HB 0.46 No scratches Example 2 Glue A/Glue D Prism columnar undulations HB 0.41 No scratches Example 3 Glue B/Glue D 稜鏡Smooth Η HB 0.44 No scratches Example 4 Glue C/Glue F 稜鏡 Columnar undulations HB H 0.33 No scratches Example 5 Glue C/Glue D Prism columnar smooth HB HB 0.31 No damage Example 6 Glue A/Glue E 稜鏡 Columnar Smoothing H 2B 0.31 No Scratch Example 7 Glue A/Glue D Curved Columnar Smoothing H HB 0.37 No Scratch Comparative Example 1 Glue A/None稜鏡 Column-like smooth H HB 0.75 to injury Comparative Example 2 Glue A / Glue F Prism Columnar undulation HH 0.45 There is damage to 1. From Table 2, Examples 1, 2, 3, 4, 5, 6 As can be seen from the results of 7, the maximum static friction coefficient Ms of the light collecting element of the present invention is less than 0.7, and the first or second surface has at least one surface pencil hardness of not more than HB, the concentrating structure is not scratched; Embodiment 1, 2 3, 6 and 7 are the second surface pencil hardness is not greater than HB, the embodiment 4 is the first surface pencil hardness is not greater than HB, and the embodiment 5 is the first and second surface pencil The hardness is not greater than HB. In particular, the second surface structure may be smooth or undulating (refer to Example 1 and Example 2 in Table 2), or the composition of the glue that can change the concentrating structure of the first surface ( Refer to Table 2 for implementation 134326.doc -28 - 1339279 Example 1 and Example 3), or the concentrating structure may be a columnar or curved columnar structure (refer to Example 1 and Example 7 in Table 2) The glue of the second surface coating may be added to the beads in the case where the first surface is not more than HB, and the beads may be added (see the glue F and the embodiment 4 in Table 2). 2. As can be seen from Table 2, the second surface structures of Examples 1, 3, 5, 6, 7 and Comparative Example 1 were smooth 'and the pencil hardness of the second surface was not greater than that of Comparative Example 1 (the maximum static friction coefficient (μ3) ) Not less than 〇.7 ' Causes the concentrating structure to be scratched. 3. As can be seen from Table 2, the second surface structures of Examples 2, 4 and Comparative Example 2 are both undulating and undulating 'in particular, the maximum static friction coefficient of Comparative Example 1 is less than 0-7, due to the first and the first concentrating elements. The pencil hardness of both surfaces is greater than ΗΒ 'causing the concentrating structure to have scratches. The above 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. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a simplified schematic view of a light collecting element of the prior art. 2 is a simplified schematic view of a light collecting element including a protective film of the prior art. Figures 3a and 3b are simplified schematic views of a light collecting element comprising a protective film of the prior art. 4 is a schematic view showing an embodiment of an optical light collecting element of the present invention. Fig. 5 is a schematic view showing an embodiment of an optical light collecting element of the present invention. Fig. 6 is a schematic view showing an embodiment of an optical light collecting element of the present invention. 134326.doc -29- 1339279 Figure 7 is a schematic illustration of one embodiment of an optical light collecting element of the present invention. [Main component symbol description]

5 concentrating structure with damaged body 8 protective film 8a diffusion layer 9 undulating structure 10 light collecting element 11 substrate 12 and 41 concentrating structure 13 and 14 protective film 411 prism column structure 330 and X! uniaxial linear column Structure 340 and X2 unimodal linear columnar structure 61 intersected non-parallel columnar structure 62 unintersected non-parallel columnar structure 63 parallel columnar structure 701 substrate 702 substrate first surface 703 substrate second surface 704 Contact area 134326.doc •30·

Claims (1)

Patent Application No. 097143802 (Replacement of Chinese Patent Application No. (January 100)) X. Patent Application Range: 1. A light collecting element comprising (a) a substrate, (b) first on one side of the substrate a surface having a concentrating structure and a crucible formed by curing a first knee liquid on a side of the substrate; and (c) a second surface on the other side of the substrate, the second surface being Coating a surface of the substrate original film or coating the second glue on the other side of the concentrating structure to form a coating, wherein the first glue and the second glue each comprise at least one selected from the group consisting of a resin composed of an ultraviolet curable resin, a thermosetting resin, a thermoplastic resin, and a mixture thereof, wherein a maximum static friction coefficient between the first surface and the second surface is measured by a standard method according to JIS K7 125 'from about 0.3 to about 0.7 And measuring, according to the JIS K5400 standard method, that at least one surface of the first and second surfaces has a pencil hardness of not more than HB. 2. The light collecting element of claim 1 wherein the condensing structure is selected from the group consisting of a columnar structure, a conical structure, a solid angle structure, a lenticular structure, a wavy structure, and an arcuate block structure. group. 3. The light collecting element of claim 1, wherein the concentrating structure comprises a plurality of columnar structures having the same height, width and apex angle and parallel to each other. Such as. The light collecting element of claim 1, wherein the light collecting structure comprises a plurality of columns and ridges. And the columnar structures include 134326-1000125.do, 1339279 b* long « ; V: /Ϊ p , · ····· Ά Ά 向 皮 皮 线性 ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; The columnar structure and the peak height do not follow the repeating structure of the extended structure. 5. The light collecting element of claim 2, wherein the braided structure is a columnar structure extending in a straight line, a curved line or a line extending. 6. The light collecting element of claim 2, wherein the apex angle of the columnar structure is between about 40[deg.] and about 120. between. The light collecting element of claim 2, wherein the columnar structure is a columnar structure. 8. The light collecting element of claim 1, wherein the height of the concentrating structure is between about t microns and about 50 microns. 9. The claim light element, wherein the light-concentrating structure has a refractive index between about 1.5 and about 1.6. 10. The light collecting element of claim 1, wherein the coating has a thickness of between about 5 micrometers and about 30 micrometers. 11. The light collecting element of claim 1, wherein the coating is smooth. 12. The concentrating element of the item, wherein the coating is non-smooth. 13. A light collecting element comprising (a) a substrate; (b) a first surface on a side of the substrate, the first surface having a light collecting structure comprising a plurality of linear columnar structures 'and Forming a first glue on the substrate side and then curing, the first surface is measured according to the K5400 standard method to have a pencil hardness of not more than hb; and (c) a second surface on the other side of the substrate, $The second surface contains a coating 134326-1000l25.doc 1339279 a layer, the coating is formed by coating a first glue with respect to the other side of the concentrating structure, wherein the first glue and the second glue each comprise at least one selected from the group consisting of ultraviolet curing resins, thermosetting The resin composed of the resin, the thermoplastic resin, and the mixture thereof, and the maximum static friction coefficient between the first surface and the second surface are measured to be between about 0.3 and about 〇7 according to the JIS K7125 standard method. 14. The light collecting element of claim 3, wherein the linear columnar structure, '. The structure has a radius of curvature of no more than 4 microns at the top. 15. For example, in May, the η collection element of the item η, wherein the coating is measured by the smooth K5400 standard method, has a pen hardness of a. Kangpi I34326-1000125.doc