TW201005374A - Optical sheet and backlight unit using the same - Google Patents

Abstract

The object of the invention is to provide an optical sheet with an excellent anti-adhesive property and a higher total transmittance for inhibiting interference and uneven brightness thereby possessing high economic efficiency and thinness, and a backlight unit using the optical sheet. The optical sheet of this invention comprises a transparent substrate film, an optical layer laminated on one side of the substrate film, and an anti-adhesive layer laminated on the other side of the substrate film, characterized in that: the anti-adhesive layer contains fillers and its resin-made binders, the flat portion of the anti-adhesive layer has an average thickness greater than 50nm and less than 150nm, and the average particle diameter of the fillers is greater than 70nm and less than 200nm. The fillers contain main ingredient of small-diameter fillers and minor ingredient of large-diameter fillers, wherein the average particle diameter of the small-diameter fillers is greater than 50nm and less than 150nm.

Description

201005374 VI. Description of the Invention: [Technical Fields According to the Invention] H-Day and the Moon are related to an optical sheet and a backlight unit using the same, and the present invention relates to a method for diffusing transmitted light and refracting toward the normal side. The optical function of collecting light, etc., and is particularly suitable for use in an optical sheet and a backlight unit in a liquid crystal display device. [Prior Art] In the liquid crystal display device, a backlight system in which a liquid crystal layer is irradiated from the back surface to emit light is generally used, and a backlight unit such as an end surface illumination type or a direct type is provided on the lower surface side of the liquid crystal layer. As shown in Fig. 5(a), the end-illuminated backlight unit 50 basically includes a linear light source 51 as a light source and a square plate-shaped light guide plate having end portions arranged along the light source 51. 52. And a plurality of optical sheets laminated on the light guide plate 52. The optical sheet has a predetermined optical function such as a function of refracting the peak direction of the light toward the normal direction side and a function of diffusing the luminance distribution, and specifically, the light diffusion sheet 53 and the edge disposed on the surface side of the light guide plate 52. Lens 54 and the like. Further, although not shown, in addition to the light diffusion sheet 53 and the cymbal sheet 54, the optical sheet may be provided with a reflection sheet disposed on the back side of the light guide plate 52 or a lenticular sheet having a microlens array on its surface. . Hereinafter, the function of the backlight unit 50 will be described. First, the light incident from the light source 51 to the light guide plate 52 is reflected by the back surface of the light guide plate 52, and the reflection sheet disposed on the back side of the light guide plate 52 (not shown). Each side surface of the light guide plate W is reflected and emitted from the surface of the light guide plate 52. The light emitted from the light guide plate 52 is incident on the light-diffusing sheet 53, and is diffused and folded toward the normal direction by a predetermined optical action such as 201005374 to be emitted from the surface of the light-diffusing sheet 53. After that, the light emitted from the light-diffusing sheet 53 is incident on the cymbal sheet 54, and is emitted as a light having a distribution of I-peaks in a substantially normal direction by the prism portion 54a formed on the surface thereof. As described above, the light emitted from the light source and the light emitted from the light source 52 is refracted toward the surface side by the light guide plate 52, and is diffused by the light diffusion sheet 53, and the composite lens 54 is substantially vertically The direction is refracted so as to refract the entire surface of the liquid crystal layer (not shown). Further, although not shown, another prism sheet or another prism sheet may be further disposed on the surface side of the cymbal sheet 54. The backlight unit of the light diffusion sheet. 'As the prior light diffusion sheet 53', as shown in FIG. 5(b), the base film 55, the light diffusion layer % formed on the surface of the base film 55, and the laminate are The anti-adhesion layer 57 on the back surface of the base film 55 (for example, see Japanese Patent Laid-Open Publication No. Hei 2-89007, etc.). The light diffusion layer 56 is configured to have a light diffusing function for transmitted light, and the light diffusing agent is contained in the adhesive 58. In the above-described light diffusing film 53, the anti-adhesion layer 57 is formed by coating a resin composition constituting a binder, a resin bead 61, and a solvent as a resin composition on the back surface of the base film 55, and a binder. Resin beads 61 dispersed in 6〇 by the tree The bead 61 has a convex portion on the back surface. The convex portion formed on the back surface of the anti-adhesion layer 57 prevents the back surface of the light-diffusing sheet 53 from being adhered to the light guide plate 52 and the like to cause interference fringes. From the viewpoint of adhesion, the resin beads 6 1 of the above-mentioned release layer 57 may be acrylate beads having an average particle diameter of 5 #m to 2 Å, etc. Therefore, the above-mentioned release layer 57 may be used in the resin beads 61. The reflection of the interface and the refraction of 201005374 cause a certain degree of scattering of light incident from the back surface. The light diffusion sheet 53 of the above-mentioned light may cause a decrease in optical function such as light transmittance due to the release layer 57. Further, in order to fix the resin beads 61 having the above average particle diameter, the average thickness of the word anti-adhesion layer 57 is set to 5 or more and &quot;claws or less. 2. The light diffusion sheet 53 of the above-mentioned precursor is contrary to the current liquid crystal. The requirement for the squeezing of the display device' and the transmission of light by the refraction at the two interfaces of the anti-adhesive layer 57 may cause duplication, etc. Further, since the anti-adhesion layer 57 contains resin beads 6 丨, so especially the convex part of the back It may become relatively soft', and may be damaged during assembly or storage and transportation of the liquid crystal display device. If the back surface of the anti-adhesion layer 57 is damaged, liquid crystal display device may be generated due to scattering of light. Further, the image redundancy is lowered, and unevenness in brightness, etc. occurs. Further, since the release layer 57 is formed by coating or the like as described above, when the light diffusion sheet 53 is manufactured, at least three steps are required: the substrate film is required. The step of forming 55, the step of forming the light-diffusing layer 56 on the surface of the base film 55, and the step of laminating the anti-adhesion layer 57 on the back surface of the base film 55 and reducing the manufacturing cost in order to achieve the current requirements The manufacturing process is required to be simplified. The disadvantages of the light diffusing sheet 53 also occur in the cymbal sheet 54, or other lenticular sheet, lenticular lens sheet, Fresnel lens sheet or the like. [Patent Document 1] Japanese Patent Laid-Open Publication No. 2000-89007 [Draft of the Invention] 201005374 The present invention is based on the fact that the above-mentioned types of anti-adhesive properties are excellent, and the purpose of the invention is to provide a phenomenon and brightness. Unevenness, advancement: the first rate, the optical means capable of effectively suppressing the interference sheet and the backlight unit using the same, and the optical means for solving the above problems are as follows: An optical sheet having a transparency The optical layer m on one side of the film, the base film, and the layered on the substrate are laminated on the substrate, and are characterized in that: one side of the anti-adhesive layer, the anti-adhesive layer contains a filler and a resin binder thereof, and an anti-adhesive layer The flat sweeping portion is taken down, the average thickness of P is 50 or more, and the (10) surface is averaged by the filler; 彳& is 7 〇nm or more and 2 〇〇nm or less at 7 Λ. Anti-adhesive::=The anti-adhesive layer contains filler and resin binder. The average thickness of the anti-adhesive layer is Μ _ The average particle size of the above filler is 70nm or more, 2〇〇, 〇_ to: , Nano-sized filler, can be below the claws. Therefore, the fine protrusions are made by the fine convex part. The fruit is densely and evenly formed on the outer surface. The dense and uniform hooks are scattered and the spots are scattered. And the right dice guides the first board, the bracts and so on. Therefore, the light has a relatively 'anti-sticking property and can prevent interference fringes due to adhesion. 〇W towel, play (4) (4) The average particle size is Γ =, - τ, therefore, the average particle size of the filler is less than: see the wavelength of light, even S? λ 4 · Gu Η ° people filler ' can also Significantly reduce the barrier to light transmission 6 201005374, so it has a higher total light transmittance. Further, in the optical sheet, the average thickness of the flat portion of the release layer is 5 〇 nmui, 15 〇, so that the average thickness of the flat portion of the release layer is smaller than the wavelength of visible light, and the two of the release layer can be reduced. The transmission 弁 green generated by the refraction at the interface &gt; 45 jb a ''' interference sees 'can effectively suppress the generation of embossing and the like. Further, in the optical sheet, the average thickness of the flat portion of the release layer is remarkably smaller than the previous average thickness, and I can promote the thinning of the currently required liquid crystal display device. Further, the optical sheet has a filler in the release layer in order to form a fine convex portion on the outer surface, but does not contain the resin beads in the prior optical sheet, and can be subjected to extrusion molding. In the production line of the step of forming the base film, the anti-adhesive layer is laminated, and as a result, other steps such as coating of the base material such as the optical sheet can be omitted, and the manufacturing workability can be improved and promoted. Manufacturing costs have fallen. The average particle size of the filler may be greater than the average thickness of the flat portion of the release layer. By making the average particle diameter of the filler larger than the average thickness of the flat portion of the release layer as described above, the fine convex portion can be remarkably formed on the outer surface of the release layer to further improve the release resistance. In the above filler, a small-diameter filler containing a main component and a large-diameter filler having an average particle larger than a subcomponent of the small-diameter filler, and the average particle size of the small-diameter filler may be 50 nm or more; . As described above, the filler containing a small-diameter filler of a main component and a large-diameter filler of a subcomponent can form a fine convex portion on substantially the entire surface by the small-diameter filler of the main component on the outer surface of the anti-adhesive layer. Further, a convex portion larger than 201005374 is formed in a scattered manner by the large-diameter filler of the subcomponent, and as a result, the anti-sticking property is remarkably improved. The content of the filler in the above anti-adhesion layer is ^ a ft / horse 2 〇 mass % or more, and 5 〇 mass % % or less. By the above-mentioned, the content of the filler of the adhesive layer is imaginary within the above range, so that it is formed on the outer surface of the anti-adhesive layer; ,, <The fineness and density of the fine convex portion are suitable for anti-adhesion, thereby preventing stickiness Further mention the ancient. The polymer constituting the above binder may have two, ^ 令 - - - - - - - - - - - - - - - - - - - - - - - By making the adhesive polymer have a three-dimensional cross-linking and 'mouth structure' as described above, the fixing property and the protective property of the filler in the anti-adhesive layer are improved, and the inside of the adhesive is assisted. Sex and anti-adhesion. Further, due to the binder polymer and the joint structure, the smoothness and wear resistance of the anti-adhesive layer are improved. The parent may be made of a polymer containing four parts of acrylic acid, less of which is known as a hardening agent. By using (iv) a (tetra) acid polyol and a hard polymer composition as a material for forming a binder as described above, it is possible to easily and surely perform a lamination operation of laminating an anti-adhesive layer on a substrate film, and: a mixture It has high transparency, and further, the three-dimensional crosslinked structure can be easily formed by the selection of the J楮甶 hardener. As the above filler, colloidal oxidizing is preferred. The colloidal fossil is excellent in light transmittance in the anti-adhesive layer, and has a good dispersibility in the binder polymer, which contributes to an improvement in heat resistance and rigidity of the anti-adhesive layer. The coefficient of variation of the particle size distribution of the small-diameter filler is preferably 鸠 or less. By setting the coefficient of variation of the small-diameter filler to 2% or less as described above, the uniformity and the protrusion height of the fine convex portions formed on the outer surface of the release layer can be made suitable for anti-adhesion, and the anti-adhesive property is further improved. 8 201005374 The above anti-adhesive layer can be dispersed and contains an antistatic agent. By dispersing the antistatic agent in the anti-adhesion layer as described above, the optical moon antistatic property can be imparted, and the anti-stick property of the optical sheet and the light guide plate, the ruthenium sheet and the like which are superimposed on the back side thereof can be further improved. . The above optical layer may contain a light diffusing agent and a binder thereof. The optical sheet is characterized in that the light diffusing sheet has a function of diffusing transmitted light by a plurality of light diffusing agents in the optical layer, and has a high anti-adhesion property to light transmittance by the anti-adhesive layer. Uniformity, economy and film properties of shell and the like. Further, the optical layer may have a fine uneven shape having refractive properties. The optical sheet is an optical sheet that follows a mold shape, such as a microlens sheet, a cymbal sheet, a lentil lens sheet, or a phenanthrene lens sheet, and has a plurality of precursor layers to condense transmitted light toward the normal direction side. Various kinds of light such as refraction and diffusion: The function 'II has high anti-adhesion property, uniformity of total transmittance, uniformity, economy and film property. In this case, the light source is used to generate the surplus g-strong, and the optical unit is used in the backlight unit. The optical film is as described above: the first film has high anti-adhesiveness and total transparency. The uniformity of the light rate and brightness, as well as the film properties, can significantly increase the light emitted by the light source: efficiency, which can promote the high brightness, energy saving and thin weight reduction required by the society. , the average particle diameter of the flat portion of the anti-adhesive layer, and "here, the "in the region of the filler." The effect of the coefficient of variation of the numerical particle size distribution of the volumetric reference 201005374 As described above, the total light transmission of the light of the present invention Rate, can effectively suppress high economical and thin film. The cost and thinness of the liquid crystal display device used in the process. The film has excellent anti-sticking property, high interference phenomenon and uneven brightness, and thus Therefore, the backlight unit of the present invention can promote high brightness, uniformity of brightness, and low [embodiment], which is called the singularity of the singularity of the singularity of the invention. FIG. 1 is a view showing the optical sheet of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 2 is a schematic bottom view of the optical sheet of FIG. 1, and FIG. 3 is a schematic cross-sectional view showing an optical sheet different from the form of the optical sheet of the drawing, and the drawing is not related to SJ i and FIG. A cross-sectional view of an optical sheet having different optical sheet shapes. ▲ Optical #1 light diffusing sheet of Fig. 1 comprising: a base film 2, an anti-adhesive layer 3 laminated on the back surface of the base film 2, and a laminate The optical layer 4 on the surface of the substrate film 2. The base film 2 must be made to transmit light, and therefore it is formed of a transparent, especially colorless, transparent synthetic resin. The one used in the base film 2 is not particularly limited. For example, a pair can be cited. Polyester polymer such as ethylene phthalate _ 曰 曰 &amp; ethylene glycol dicarboxylate, cellulose polymer such as diethyl hydrazine cellulose or triethylene fluorenyl cellulose, polycarbonate polymer 'Polyacrylic polymers such as polymethyl methacrylate, styrenic polymers such as polystyrene, Cyanchao's stupid ethylene copolymer, polyethylene, polypropylene, polyolefin with cyclic or even norbornene structure , an olefin polymer such as an ethylene-propylene copolymer, a gas-vinyl polymer, a nylon or an aromatic polyamine, etc. 201005374 a guanamine polymer, a ruthenium-based polymer polymer, a poly bond _-polymer # "Polymer, polymerization polymer, 35 dichloroethylene polymer, this thioether polymer, vinyl aryl ester polymer, poly f disk polymer dibutyric acid polymer, medium Preferably, the transparency is excellent, and the strength is higher than that of the *μ base polymerization. Wait. More preferably, it is a polyethylene terephthalate which is improved in exchangeability, and is used as a material for forming the base film 2.

Two or more types are used in combination or in combination. In addition, 逑 合物 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可 可For example, lubricants and cross-linking agents quot &quot;° as the additive, agent, anti-flame agent, collateral, knowing, antistatic agent, flame retardant, flame retardant, foaming agent, antifungal agent, A filler deterioration agent, a dispersant, or the like. , /,, plasticizer, anti-layer thickness of the substrate ( 2 (flat is preferably not particularly limited, but 1RR 250 &quot; m or less, more preferably 20 or more, 188 # m or less. If the substrate film 2 When the thickness of 2 ^ μ is less than the above range, when a polymer composition for forming an optical layer (a layer for functioning as an optical sheet) is laminated on the surface of the base film, curling and use are liable to occur. Difficult problem 4. On the other hand, if the thickness of the substrate film 2 exceeds the above range, the brightness of the liquid crystal display device on which the optical sheet 1 is mounted may be lowered, and the thickness of the backlight unit is large, so that the thickness of the backlight unit is large. There is also a need for the type of liquid crystal display device. 'The anti-adhesive layer 3 is composed of a plurality of fillers 5, 11 201005374 which are layered and spaced apart, and the back of the filler 5 is fixedly bonded (2: : the adhesive 6 on the back side, by means of the back surface, the filler 5 is enlarged, and the anti-adhesion layer 3 is adjacent to the light guiding protrusion 7. Therefore, if the surface of the optical sheet i is Therefore, the layer 'will be abutted on the light guide plate by the convex portion 7 on the back side. The entire back surface of 1 is in contact with the light guide plate, etc. ...1: The optical sheet 1 is adhered to the light guide plate and the like, and unevenness of brightness is generated on the surface of the liquid crystal which is prevented from being displayed. Machine filling: :: 5 specific The material can be roughly classified into an inorganic filler and the second is the inorganic filler, and for example, it can be used: a substance selected from the group of the elements of the periodic table (for example, Shi Xi, Shao, Ci, Qin, Kie, etc.): Hydroxide, strontium sulphide, sulphuric acid or a mixture of these. Compared with 2, it is 'easy to obtain the particle size of the nanometer, and the shielding of light = erbium dioxide. x, as an organic filler, for example Can be used: 〇曰 (4) nitrile resin, polyaminocarboxylic acid | purpose, polyethylene, t, polyacrylonitrile 'polyamide, etc. Among them, preferably after hardening; month: more than ... tannic acid resin, more The shape of the filler 5 is not particularly limited, and examples thereof include a spherical shape: a hammer = a needle shape, a rod shape, a cubic shape, a plate shape, and a scale. Shape, fiber shape, which is preferably a convex portion 7 shape, and the formation of the back surface of the anti-adhesion layer 3 is excellent, and performance A good anti-adhesive spherical shape. The lower limit of the average particle diameter of the filler 5 is preferably 7 () _, more preferably 1 ° 0 nm. On the other hand, the upper limit of the average granule pinch as the filler 5 is Good: 200nm, more preferably 15〇_. If the average particle size of the filler 5 does not reach the lower limit of 12 201005374, the surface energy will be old, the work adhesive is 6 t, and, the second:: bucket: can be difficult to disperse The content contained therein becomes small, so that it is possible that the average particle diameter of the filler 5 exceeds the above upper limit, ==. Conversely, if the effect of blocking the penetration of the light is long, the total light transmittance is lowered. H may cause the anti-adhesive layer 3 of the filler 5 of the optical sheet 1 to be formed so as not to be easily adhered to the substrate film 2 even if it is not t (the county having the back surface within the above average particle diameter range). Reduce the cost of manufacturing: ί 二直 r laminated anti-adhesive layer with the composition of you also people who are only lightweight and thin film. Further, the anti-adhesive layer 3 having the above-mentioned nano-sized filler 5 has an antistatic effect and an effect of preventing damage in addition to the above-mentioned light-transmitting and anti-adhesive property. The lower limit of the content of the filler 5 in the anti-adhesive layer 3 (the content in terms of solid content in the composition for the anti-adhesive layer) is preferably 2% by mass, more preferably, the upper limit of the content of the filler 5 is on the other hand. Preferably, (10) is 'better $ 40% by mass. If the content of the filler 5 is less than the above lower limit, the uniform dispersibility and density of the convex portion 7 formed on the back surface of the anti-adhesion may be lowered, and the anti-adhesive effect may not be sufficiently obtained. On the other hand, if the content of the filler 5 exceeds the above upper limit, the anti-sticking effect cannot be further improved, and the light transmittance may be lowered. The coefficient of variation of the particle size distribution of the filler 5 is preferably 2% by mole or less, more preferably 10% or less. By setting the coefficient of variation of the filler 5 in the above range, the uniformity of the protrusion height formed on the back surface of the anti-adhesion layer 3 is improved, and the anti-sticking property is further improved. Further, by making the coefficient of variation of the filler 5 within the above range, the reduction of the V of the small-diameter filler which is unfavorable for the anti-adhesion, and the reduction of the filler 5 per unit area can be promoted, and the anti-adhesion prevention can be promoted. The scattering or the like on the layer 3 causes an effect of a decrease in optical function. The binder 6 can be formed by hardening the polymer composition containing the base polymer to form the crucible edge-bonding agent 6, and the filler 5 can be fixed to the back surface of the base film 2 at substantially equal density. From the viewpoint of improving light transmittance, the substrate yttrium used in the binder 6 itself is preferably a transparent ruthenium, more preferably a colorless transparent one. The base polymer is not particularly limited, and examples thereof include poly(methacrylic) resins such as poly(methacrylic acid) and polybenzal methyl acrylamide, and poly(biphenyl)styrene. A polyether-based resin represented by a polystyrene-based resin or the like, a polyether-based resin typified by poly(2,6-fluorenyl-, 4-phenylene ether), and a poly(oxycarbonyloxy-oxime) -Polyphenyl-based resin represented by phenyl isopropylidene-yttrium-phenylene), poly(oxy-2,2,4,4-tetramethyl), 3_cyclobutyloxy (p-phenylene fluorenyl) is a polyglycol, a resin, a poly(oxyindoleyl-phenylene-phenylene), a poly(oxyanthracepin-1,4-phenylene group) A fluorinated wind-based resin represented by propylene, '4, phenyloxy-:, 4-phenylphenyl fluorenyl hydrazine a polyamido-based resin represented by a mercapto imido group, 4,4'-biphenyl), which is a poly(thio-anthracene, 'phenylphenylsulfonyl-[,phenylphenylene]-phenyl) Represented polysulfide resin 'unsaturated polyester resin, epoxy resin,

Melamine «lipid, propylene phthalate-based phthalate resin, poly-resin polyimide resin, polyphosphazene-based resin, 7-oxo (tetra) ester composed of organic alkoxy oxime &lt; These polymers may be used alone or in combination of two or more. E is particularly self-processable and can be easily formed into a release-preventing method by a method such as coating. 14 201005374 In terms of layer 3, the above substrate polymer is preferably a polyol. Further, from the viewpoint of the formability of the two-dimensional crosslinked structure described below, the upper substrate polymer is preferably a polyolefin-based copolymer. The polymer having three-dimensional crosslinks 6 as shown in Fig. 2 has three-dimensional crosslinkability and improved adhesion and adhesion resistance. Further, for the reason, the hardness of the anti-adhesive layer 3 and the smoothness constitute the polymer 1 〇 structure of the binder 6. Since the binder structure is formed as described above, the filler 5 in the anti-adhesion layer 3 contributes to the uniform dispersibility of the filler 5, and the polymer 10 has a three-dimensional crosslinked structure, and the properties and the abrasion resistance are improved. There is no particular limitation on the method of constituting the three-dimensional cross-linked gentleman. The parental structure of the three-dimensional cross-linking is not limited, and it is generally known that the three-dimensional cross-linked structure can be made by the above-mentioned substrate I. The polymer composition is formed by containing a polyfunctional precursor having two or more unsaturated groups. The polyfunctional monomer having two or more unsaturated groups means a monomer having two or more unsaturated functional groups capable of undergoing mound polymerization with a monomer or a prepolymer as a functional group capable of copolymerization. , Ζ · · · · · · · · · · · · · · · · · ············································································· Functional monomer. - as the polyfunctional monomer having 2 or more unsaturated groups, for example, ethylene glycol di(meth)acrylic acid vinegar, diethylene glycol di(methyl) acrylate triterpene Glycol di(methyl) propyl acetoacetate, glycerol (di)trimethyl) acrylate - hydrazine, two! Di-(methyl)-propyl acetoacetate of polyols such as methyl propyl (di/tri) (meth) acrylate vinegar, pentaerythritol (di/tri/tetra) (methyl) acrylate vinegar , tri-(methyl)acrylic acid vinegar, tetrakis (meth)acrylic acid vinegar; p-diethylbenzene, 15 201005374 o-divinylbenzene, etc. #西的, (甲丙能单;; Methyl)acrylic acid vinyl sulfonium (meth) acrylate propyl acetonate; diene-diene-based diene; dichloride-introduced monomer material having a phosphazene skeleton and polymerized A polyfunctional monomer having a hetero atomic cyclic skeleton. #有有更更知知其々 a,..^土之夕 g monomer monomer compounding amount is preferably a two-dimensional parent The weight of the polymer in the polymer is 5% by mass or less and 80% by mass or less. If the above-mentioned _ is not obtained, the heat resistance and solvent resistance may not be caused, and if the amount is more than the above range, the I: 1 direction may be combined. On the other hand, if the characteristics of the rubber are lowered, the impact resistance and the like may be lowered, and the plastic may be used as the above-mentioned polyol. For example, it may be mentioned that: (3) The chromium ruthenium obtained by the polymerization of the early body of the unsaturated body of the unsaturated body, and the polyacetal polyol obtained by the extraction of the hydroxy group under the condition of excess hydroxyl group, etc. 2 or more. 珣 use, or as a hydroxyl-containing unsaturated monomer, can be listed. Xiangqi 7_ cattle · (a) such as 2-PS-ethyl acrylate, 2-hydroxypropyl acrylate, 曱其m 〇 Propylene-containing phthalocyanine- 2, thiol-based acrylate, propylene glycol, high-acrylic sterol, etc., containing a trans-unsaturated monomer; (b) for example, dipropylene glycol, ring Oxypropane, butanediol, epoxide cyclohexane, phenyl glycidyl ether, decanoic acid 1 soil) rn . , β / by 酉曰, Placcel FM-1 C Da1Cel Chetmcal Industries Or an epoxy compound, which is obtained by reacting with, for example, acrylic acid, methacrylic acid-deficient T-based acrylic acid, maleic acid, fumaric acid, butenoic acid, itaconic acid, etc. 16 201005374 a hydroxyl group-containing unsaturated monomer or the like. One or two or more selected from the group of the hydroxyl group-containing unsaturated monomers may be polymerized to produce the above polyol. Further, the above polyol may also be selected from the group consisting of ethyl acrylate, n-propyl acrylate, isopropyl propionate, n-butyl acrylate, tributyl acrylate, ethyl hexyl acrylate, ethyl decyl acrylate. , n-propyl decyl acrylate, isopropyl methacrylate, n-butyl methacrylate, tert-butyl methacrylate, ethyl hexyl acrylate, mercapto propylene Glycidyl methacrylate, cyclohexyl methacrylate, styrene, vinyl benzene, fluorene methyl styrene, acrylic acid, methacrylic acid, acrylonitrile, vinyl acetate, vinyl propionate, ethylene stearate Ester, propylene acetate, diallyl adipate, diconazole of itaconic acid, diethyl maleate, chloroacetamidine, dimethylidene chloride, acrylamide, N-A One or two or more ethylenically unsaturated monomers of acrylamide, N_butoxymethyl acrylamide, diacetone acrylamide, ethylene, propylene, isobutylene, etc. and selected from the above (a And the hydroxyl group-containing unsaturated monomer in (b) is produced by polymerization. The number average molecular weight of the polyol obtained by polymerizing the monomer component containing the ethylenically unsaturated monomer is 1 (10) Å or more and 5 Å or less, preferably 5,000 or more and 1 Å or less. . Further, the hydroxyl value is US$ or more, and 3 乂 ’ is preferably 10 or more and 2 Å or less, more preferably 2 Å or more and 15 Å or less. As the polyester polyol obtained under the conditions of excess radical, (e) such as ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, -butanol, 1,4-butanediol, pentane Glycol, neopentyl glycol, iota, 6-hexanediol, 17 201005374 1,10-decanediol, 2,2,4-dimethylpyrazine 113;^-;1(^^-mercapto-1, 3-戍-Yin, Trimethylolpropane, Tri-fermented, Glycerol, Pentaerythritol, Cyclohexanediol, Gasified Double A, Recordylmethyl) Cyclohexane & Phenyldiphenyl Polyhydric alcohols such as acetamidine), tris(10)ethylethyl isocyanurate, phthalic acid, and the like (4), for example, cis-butane diacid, fumaric acid, succinic acid, adipic acid, sebacic acid, Polybasic acids such as sebacic acid, trimellitic acid, terephthalic acid, phthalic acid, isophthalic acid, etc., in polyols such as propanol, monohydric alcohol, polyethylene glycol, trihydroxypyridyl propane, etc. The number average molecular weight of the polyester polyol obtained by the reaction of the excess hydroxyl group is 500 or more and 300,000 or less, preferably 2, by the reaction under the condition that the number of base groups is more than the number of the above-mentioned polybasic acid. 〇 Above 'face (9) below. Further, the warp value is 5 or more and 3 Å or less, preferably (7) or more and 2 Torr or less, more preferably 2 Å or more and ι 5 〇 or less. The polyol used as the base polymer of the polymer composition preferably has a (meth) group obtained by polymerizing a monomer component containing the polyester polyol and the hydroxyl group-containing unsaturated monomer. An acrylic polyol such as an acrylonitrile unit. The use of the polyester polyol or the acrylic polyol as the binder of the base polymer 6 is highly economical, and the yellowing of the release layer 3 can be suppressed. Further, either of the polyhydric phenol and the acrylic polyol may be used. In addition, the number of the polyester polyol and the acrylic polyol may be particularly limited as long as it satisfies two or more per molecule, but the hydroxyl value in the solid component is 10 In the following, the number of crosslinking points is reduced, and solvent resistance, water resistance, heat resistance, surface hardness, and the like tend to be lowered by the film properties of 18 201005374. As the above substrate polymer, a polyhydric alcohol having a cycloalkyl group is preferred. As described above, by introducing a ring-shaped base into the polyol constituting the binder 6 as the base polymer, the water repellency and water resistance of the binder 6 can be made high, and the high-temperature and high-humidity conditions are high. The bending resistance, dimensional stability, and the like of the optical sheet are improved. x improves the basic properties of the coating film such as weather resistance, hardness, thickness, and solvent resistance of the anti-adhesive. Further, the affinity between the binder 6 and the filler 5 to which the organic polymer is fixed on the surface, and the uniform dispersibility of the material 5 are further improved. The cycloalkyl group is not particularly limited, and examples thereof include cyclobutylene, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclooctyl group, cyclodecyl group, cyclodecyl group, earth ring eleven alkyl group, and ring ten. Dialkyl, cyclotridecyl, cyclotetrahydrocarbyl, cyclopentadienyl, cyclohexadecane, ring seventeen (four), ring ten person base. The polyol having the above-mentioned cycloalkyl group is obtained by copolymerizing a polymerizable unsaturated monomer having a ring-based group. The polymerizable unsaturated monomer having a cycloalkyl group means having at least one ring-based group in the molecule: a polyunsaturated monomer. The polymerizability (tetra) and the monomer are not particularly limited, and examples thereof include (meth)acrylic acid cyclohexanol, (methyl) propyl acetoacetate, and (meth)acrylic acid third earth. Alkyl and the like.酉曰(Methyl)acrylic acid ring When the polyol is used as the substrate polymer as described above, the product may be obtained by polymerizing a polyisocyanate compound as a curing agent. Dimer, t substance, tetramer oxime derivative. The monolith composition contains a polyisocyanate 19 201005374 ester hardener, and the following three-dimensional crosslinked structure can be easily and surely formed, and the film properties of the anti-adhesive layer 3 are further improved. Further, by blending the polyisocyanate compound, the curing reaction rate of the polymer composition can be increased. Therefore, even if the polymer composition contains a cationic antistatic agent which contributes to the dispersion stability of the fine inorganic filler, The productivity of the curing reaction rate due to the cationic antistatic agent is sufficiently compensated, and the productivity can be further improved. The polyisocyanate compound is preferably a diphenylene diisocyanate derivative or a mixture of the xylene diisocyanate derivative and an aliphatic diisocyanate derivative. The xylene diisocyanate vinegar derivative has a large effect of increasing the reaction rate of the polymer composition, and yellowing and deterioration due to heat or ultraviolet rays in the aromatic monoisocyanate derivative. Therefore, the temporal deterioration of the light transmittance of the optical sheet 1 can be reduced. On the other hand, the effect of improving the reaction rate of the aliphatic diisocyanate derivative is smaller than that of the aromatic diisocyanate derivative, but it is caused by ultraviolet rays or the like. Since the use, the deterioration, and the like are extremely small, the effect of improving the reaction rate and the effect of preventing yellowing can be achieved by blending with the xylene diison gas S夂sa and the living organism. The lower limit ' of the compounding amount of the polyisocyanate compound (the amount of the solid component converted to the i00 part of the polymer component in the polymer composition) is preferably 2 parts', more preferably 5 parts. On the other hand, the upper limit of the amount of the above-mentioned hardening agent is preferably 2 G parts, more preferably 15 parts. By setting the amount of the polyisocyanate compound in the above range as described above, the above polymer composition can effectively exhibit the effect of increasing the rate of the curing reaction. 20 201005374 As the above inorganic filler 5, a surface-fixed (tetra) organic polymer can be used. By using the inorganic filler 5 to which the organic polymer is immobilized as described above, the dispersibility in the binder 6 or the affinity with the binder 6 can be improved. The specific molecular weight, shape, composition, and functional group of the immobilized organic polymer are not particularly limited, and any organic polymer can be used. Further, the shape of the organic poly-σ material may be any shape such as a straight bond, a bond, or a crosslinked structure. f is a specific tree constituting the above organic polymer, and examples thereof include a (meth)acrylic resin, a polystyrene, a polyvinyl acetate, a polyolefin such as polyethylene or polypropylene, a polyethylene oxide, and a dichlorochloride. A polyester such as ethylene or polyethylene terephthalate or a copolymer thereof; or a resin obtained by partially modifying a functional group such as an amine group, an epoxy group, a hydroxyl group or a carboxyl group. Among them, an organic polymer containing a (meth)acrylic acid unit such as a (meth)acrylic resin, a (meth)acrylic acid-styrene resin, or a (meth)acrylic acid-polyacetic resin is used as an essential component. It is preferred to have a film forming function. The other side I is preferably a resin having compatibility with the base polymer of the above polymer composition, and therefore, it is preferably one having the same composition as the substrate contained in the polymer composition. Λ - Further, the fine particles of the inorganic filler 5 may also contain an organic polymer. Thereby, moderate softness and toughness of the inorganic material as the core of the filler 5 can be imparted. Further, the organic polymer may be an alkoxy group, and the content of the filler 5 in which the organic polymer is fixed is preferably 0.01 mmol or more and 5 Å or less per 1 g of the organic polymer. By the alkoxy group, the affinity between the adhesive of 6 201005374 and the dispersibility of the binder 6 and the adhesion of the binder 6 can be improved. The above alkoxy group means an R fluorenyl group bonded to a metal element forming a fine particle skeleton. The R is an alkyl group which may be substituted, and the r fluorenyl group in the fine particles may be the same or different. Specific examples of R include, for example, an anthracenyl group, an ethyl propyl isopropyl group, an n-butyl group, and the like. It is preferable to use an alkoxy group of the same metal as the metal constituting the filler 5 and when the filling hopper 5 is a colloidal cerium oxide, it is preferable to use an alkoxy group having ruthenium as a metal. The rate of the organic polymer in the non-container 5 in which the organic polymer is fixed is not particularly limited, but it is preferably based on the filler 5 to achieve 〇_5 mass. /〇 or more, 5〇% by mass or less. The above-mentioned organic polymer defined on the filler 5 is formed by using a polymer composition containing a binder 6 as a binder, and may contain a polyfunctional group selected from two functional groups which react with a hydroxyl group. At least one of an isocyanate compound, a melamine compound, and an amine resin. Thereby, the matrix resin of the filler and the binder 6 is bonded by a crosslinked structure, thereby improving storage stability, stain resistance, Γ &amp; α, flexibility, weather resistance, storage stability, and the like. Further, the obtained film has gloss. ^, the antistatic agent may be mixed in the polymer composition in a finely dispersed state. The formation of the binder 6 by the polymer composition in which the antistatic agent is mixed can cause the light sheet 1 to exhibit an antistatic effect, thereby preventing adsorption of dust or being difficult to overlap with the ruthenium or the like due to static electricity. The problem. Further, if an antistatic agent is applied to the surface, the surface may be sticky or dirty, but by dissipating the antistatic agent in the polymer composition as described above, the drawback can be reduced 22 201005374. For the antistatic agent, there are no anionic diterpenoids such as a sulphate or an alkyl phosphate. For example, a cationic antistatic agent such as an alkyl odorant compound can be used, and a quaternary ammonium salt or a sorbitan can be used. Alcoholic anhydride monostearic acid vinegar, ethanol: glycol, polyoxyethylene, polyglycolic acid, etc., antistatic, anti-static, non-ionic antistatic: end, metal oxide powder, carbon nano; . :: Conductive metal The cationic antistatic agent factory with a large electrical effect is preferably an antistatic antistatic agent, which exerts an antistatic effect. * Adding a small amount of the cation to the substrate, as a base polymer for forming the adhesive, filling the base 5, and using the polymer composition for the fight, in addition to the hardener, the antistatic sword is incorporated into, for example, a plasticizer, dispersed Agents, each: suitable antioxidants, viscous modifiers, lubricants, and light stabilization: the flat portion of the core anti-adhesive layer 3 is wide. The lower limit of the average thickness is preferably 5 〇 &amp; (the area in the region without filler 5 is preferably 50 nm, more preferably the flat portion of the 7 〇 anti-adhesive layer 3: 〇 _. In addition, the aspect is 120 If the anti-X sense is preferably 15 〇 nm, the average thickness τ of the right anti-adhesive layer 3 may cause the filler s ^ , the lower limit, if (4)... the true 枓 5 is fixed to the back of the substrate film 2 On the other hand, if the average thickness T of the anti-adhesive layer 3 exceeds the above-mentioned upper limit, the anti-adhesive convex portion can be made smaller by the adhesion preventing layer 3, and the result may cause the above upper limit to be exceeded. :. Also, if the average of the anti-adhesive layer 3... the dryness of the transmitted light ^ see the refraction of the two interfaces of the anti-adhesive layer 3 to produce a good phenomenon, thus creating a double-grain, etc. The average roughness (Ita) of A/r is preferably 〇.〇5 &quot; mu upper, 〇.15 Mm or less, more preferably 〇〇8 μιη or more, 〇12 Μ 23 201005374 m or less. Anti-adhesive layer The maximum height (Ry) of the back side of 3 is preferably 〇·4 &quot;, above 0.9 // m, more preferably 〇6 &quot; m or more, 〇7 &quot; below the claw. Anti-adhesive layer 3 The tenth point average roughness (Rz) of the surface is preferably 〇3 (four) :: upper, 〇·8..., more preferably 〇.5...up, 0.6.... if the arithmetic mean roughness of the back side of the anti-adhesive layer 3 (The maximum height (^) and the ten-point average roughness (Rz) are smaller than the above range, which may result in a decrease in the fine convex portion on the back surface of the release layer 3 and a decrease in the anti-adhesive property. If the arithmetic mean roughness (Ra) or the like exceeds the above range, glare may occur on the surface of the liquid crystal display device, resulting in deterioration of quality. The optical layer 4 is provided with a plurality of substantially uniform surfaces disposed on the surface of the substrate film 2. a light diffusing agent 8 and a binder 9 of the plurality of light diffusing agents 8. The plurality of light diffuses are coated by the binder 9. The plurality of light diffuses contained in the optical layer 4 as described above The agent 8 allows the light transmitted from the back side of the optical layer 4 to the front side to be uniformly spread. x, by the complex (four) light spread (four) 8, the fine unevenness is formed substantially uniformly on the surface of the optical layer 4. The refraction of the fine meniscus lens formed on the surface of the optical #1 as described above allows the light to diffuse better Further, the average thickness of the optical layer 4 is not particularly limited. For example, it is assumed to be i...upper, three 〇...down. The light diffusing agent 8 has the property of diffusing the green color of the green The particles are substantially filled with a filler and an organic filler, and as the filler, for example, a dioxide dioxide, an oxidized quartz, a oxidized sulphur, a zinc oxide sulphide, a sulphuric acid, or the like can be used. As the material of the organic filler, for example, an acrylic acid system: a ruthenium diene nitrile resin, a polyamino carboxylic acid sl, a polychloroethylene, a polystyrene, a dilute nitrile, a polynitramine or the like can be used. To, (four) 24 201005374 Shu Yue, better for poly-t-butyl acrylate vinegar (five) ma). The shape of the light diffusing agent 8 is not particularly limited, and may be, for example, a spherical shape, a spindle shape, a needle shape, a pile type, a fiber shape, or the like. Among them, a spherical beads having a high light diffusibility are preferably used as a sheet shape. The lower limit of the average particle diameter of the light diffusing agent 8 is preferably 2 # m, more preferably 5 is preferably 5 &quot; m. On the other hand, the upper limit of the average particle diameter of the light diffusing agent 8 is preferably 50, more preferably 20, most preferably 1... If the average particle diameter of the light diffusion is less than the above range, the unevenness of the surface of the optical layer 4 formed by the diffusion of the light will become small, and the light necessary for the light diffusion sheet may not be satisfied. Diffusion. On the other hand, if the average particle diameter of the light diffusion is larger than the above range, the optical length will increase 'and it is difficult to uniformly spread. The lower limit of the blending amount of the light diffusing agent 8 (the amount of the base polymer in the polymer composition of the material forming the binder 9) and the solid content of the object 100 is preferably 1 Preferably, the amount is preferably 2 parts, preferably 50 parts, and the upper limit of the compounding amount is preferably 5%, preferably 2 parts. The reason is that if the blending amount of the light diffusing agent 8 does not reach the above range, the light diffusibility may become insufficient. In addition, if the blending amount of the light diffusing exceeds the above range, the fixed diffusion is uniform. The effect will drop. Further, in the case of a so-called upper light-diffusing sheet disposed on the surface of the enamel sheet, it is necessary to have a high light diffusibility, and therefore the amount of light diffusion is preferably Η) or more and 40 parts or less. More preferably, it is iq or more and 30 or less. Adhesive bonding is formed by hardening a polymer composition containing a substrate polymer into a curing agent. Using the person, the light diffusing agent 8 is disposed in a substantially equal manner on the substrate film 2, _U L , on the surface. The polymer composition for forming the binder 9 is the same as the polymer composition of the binder 6 for forming the above-mentioned release layer 3. The composition of the σ-forming binder 9 may contain a minute inorganic filler in the composition of the composition. By bonding the adhesive 9 to the right g and having a fine inorganic filler, the optical layer 4 and the optical sheet i are made resistant to dryness 70. The inorganic substance constituting the micro inorganic filler is not particularly limited, and the handle * ^ is an inorganic oxide. The inorganic telluride is defined as: metal 亓妾 + π _ ‘, fly occupies', to form a ^ ^ _ metal compound via a bond with an oxygen atom. As the metal element constituting the inorganic oxygen species, for example, preferably A, s ώ - main ^ - soil weight 佺 is selected from the group 2 to the sixth element of the periodic table of the halogen, more preferably selected from the vowels n 兀Elements of Groups 3 to 5 of the Periodic Table of the Prime Term. More preferably, it is an element selected from the group consisting of Si, Al, Ti; ^7 - r, and in terms of improving the heat resistance and uniformity of the release property, the gold, and the fish is a colloidal ceria which is a Si. The filler is the best. Further, the shape of the fine inorganic filler, the needle shape, the plate shape, the scaly shape, and the crushed shape are not particularly limited. The lower limit of .1Λ *open + uniform particle control is preferably A 5 _, more preferably l〇tim. Another ancient: ΑΔ, ί "face, the upper limit of the average particle size of the micro-inorganic filler is m is nm. The reason is: if the average particle size of the micro-inorganic filler is clean, μ &gt; Ancient, ... not reaching the above range, the surface energy of the micro inorganic filler is: r: 攸 and easy to agglomerate, etc. 'Conversely', if the average particle size exceeds the total ground 2 +: white turbidity due to the influence of short wavelength, and thus The transparency of the optical sheet 1 is maintained by the king. 26 201005374 The lower limit of the amount of the fine inorganic filler relative to the base polymer (the amount of the inorganic component only) is preferably in terms of solid content. 5 parts, more preferably 5 parts. On the other hand, the upper limit of the above-mentioned fine inorganic filler is preferably 5 parts, more preferably 2 parts, and the best is ι〇〇 When the amount of the fine inorganic filler is less than the above range, the heat resistance of the optical sheet i may not be sufficiently exhibited. On the other hand, if the amount exceeds the above range, it is difficult to blend into the polymer composition, and It is possible to make the transmittance of the optical layer 4 As the fine inorganic filler, as in the case of the above-described filler 5, an organic polymer may be used in which the surface layer is fixed. # Use the fine inorganic filler to which the organic polymer is fixed as described above, and the binder 9 can be improved. The dispersibility and the affinity with the binder 9. The method for producing the optical fiber is not particularly limited as long as it can produce the above-described ones, but it is preferable to use a production method having the following steps. ' (a) a substrate film forming step of forming a substrate film extrudate composed of a thermoplastic resin by extrusion molding using a τ-type mold, and (b) a laminating step of squeezing the substrate film a composition for laminating an anti-adhesive layer on the surface of the body (the stretching step is to stretch the laminate of the substrate film extrudate and the anti-adhesive layer composition layer) (d) to form the optical layer 4 The step of forming the optical layer 4 by laminating the composition for the optical layer in which the light-diffusing agent 8 is mixed in the polymer composition of the binder 9 onto the surface of the substrate 2 to form the optical layer 4. Simultaneously by co-extrusion molding using a T-die The substrate 臈 forming step and the above-described 讳 逻 逻 逻 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 201005374 Before the stretching step of the layer stretching, the step of laminating the composition for the anti-adhesive layer on one side of the substrate film extrudate is carried out, so that the step of forming the substrate film and the stretching step can be performed The optical sheet is produced by suppressing the manufacturing cost, improving the productivity, and the work efficiency. The optical sheet 1 is diffused by the light contained in the optical layer 4 as a result of the same production line (that is, the in-line lamination step). The reflection or refraction at the interface of the agent 8 and the refraction of the fine concavities formed on the surface of the optical layer 4 have a high light diffusion function (directional diffusion function). Further, the anti-adhesive layer 3 of the optical sheet i contains the filler 5 and a resin-made adhesive 6'. The average thickness of the flat portion of the anti-adhesion layer 3 is _ or more, and the average particle diameter of the filler 5 is 7 〇 nm or more. Since the filler of the nano-size is used, the fine convex portion 7' is formed on the outer surface of the anti-adhesion layer 3 by a nano-sized filler 5, and as a result, it can be densely dispersed. &quot; scatter-like contact with the light guide plate overlapping the back side

Li::, the optics... has a high anti-stick properties and may prevent: adhesion and interference fringes. In the optical sheet 1, the average particle diameter of the filler 5 which exhibits the anti-adhesive property is at least 2 Å or less, so that the level of the filler 5 is the wavelength of the light, even if it is blended with the material 5 The effect on the permeability can be significantly reduced, resulting in a higher total light transmittance. The average thickness of the flat portion of the anti-adhesive layer 3 in the light-applying sheet 1 is M, M is nm, and the average is 15 〇 as follows: Therefore, the two flat portions of the anti-adhesive layer 3 are smaller than visible light. The wavelength, which can reduce the interference phenomenon of the transmitted light due to the refraction on the surface of the anti-adhesion layer 3, can effectively suppress the occurrence of the dull pattern of 201005374. Further, the average thickness of the flat portion of the anti-adhesive sheet of the optical sheet 1 is smaller than that of the previous average, so that the thickness of the currently required liquid helium display device can be promoted. In the optical sheet 1, in order to form the convex portion 7 on the outer surface of the optical sheet 1, the resin yarn of the anti-adhesive layer is formed, so that I; / material 5, but including the previous aperture Further, the layer (4) can be laminated in the line by the molding step of the film 2 by the extrusion molding method. As a result, other steps such as coating after forming a base film such as an optical sheet can be omitted. Workability and promote reduction in manufacturing costs. The light of FIG. 3 includes a base film 2, an anti-adhesive layer 2 laminated on the back surface of the base film 2, and an optical layer laminated on the surface of the substrate 2, the base film 2, and an optical layer. 4. The type, content, shape, and the like of the filler 5, as well as the adhesive sheet 6 and the manufacturing method, etc., are the same as those of the above-mentioned optical sheet, and the same reference numerals are attached thereto, and the description thereof is omitted. Anti-adhesive layer 12 and figure! Similarly, the optical sheet i has a plurality of fillers 5 disposed in a layered manner and spaced apart from each other, and the binder 6 is fixed to the surface of the base film 2. The filler 5 contains a small-diameter filler of a main component and a large-diameter filler crucible having an average particle diameter larger than that of the minor component of the small-diameter filler 5a. The optical sheet 11 contains a small-diameter filler having a main component and a large-diameter filler 5b as a filler 5, whereby the small-diameter filler 5a of the main component is used to form a relatively denser surface on the back surface (outer surface) of the release layer 12. The fine convex portion 7a which is dispersed is formed by the large-diameter filler 5b of the subcomponent, and the relatively large convex portion 7b is formed in a scattered manner, so that the sticking resistance is remarkably improved. The lower limit of the average particle diameter of the small-diameter filler 5a is preferably 5 〇 _, more preferably 29 201005374 80 nm. On the other hand, the upper limit of the average diameter of the small diameter 埴 and '4 5a is 150 nm, more preferably 12 〇 nm. If the average particle size of 5 k of J k filler is not far from the lower limit, it may cause the surface energy to be on the raft, and it is difficult to disperse it in the binder, and fill it with a small diameter. The convex portion 7a formed in the anti-adhesive layer 3 of the bucket 5 a becomes small, and it is impossible to prevent the sticking of the soap. On the other hand, if the average particle size of the small material 5a exceeds the upper limit of the above ip and 疋, the effect of shielding the light transmission due to the influence of the short wavelength may increase the effect of the iron + anti-food, resulting in the optical film. The total light transmittance of 丨1 decreases. The lower limit of the average diameter of the large-diameter filler 5b + τ 10 ^ 较佳 is preferably 2 〇〇 nm, 300 纳米. On the other hand, the large diameter 埴祖仏... "The upper limit of the average particle size of the filled sorghum is preferably .&quot;m, more preferably... If the average diameter of the large diameter filler 小于 is less than the above lower limit, then scatter The convex portion 7b formed on the back surface of the anti-adhesion layer 12 is reduced by 'I and the anti-adhesive property is not improved. On the other hand, if the average particle diameter of the large-diameter filler 5b exceeds the above upper limit, the anti-adhesion layer is provided. The fixing property of the large-control filler 5b in η is lowered, and the order is further reduced by the thin film formation of the anti-adhesion layer 12. The blending of the large-diameter filler 5b with respect to the total filler 5 is preferably 5% by mass or more and 30% by mass. In the following, it is more preferably 1% by mass or more and 2% by mass or less. When the mixing ratio of the large-diameter filler 5b is less than the upper side & $ J in the above range, the anti-adhesive layer 12 is formed in a scattered manner as described above. The density of the large convex portions on the back side will decrease, so that the above-mentioned anti-sticking effect can not be improved. On the other hand, if the blending ratio of the large twisted filler 5b exceeds the above range, the solid is not achieved. The effect of improving the sex', on the contrary, due to the matching of the large diameter to fill the 5b, may result in The optical transmission of the optical sheet 11 is linearly reduced. 30 201005374 The optical film of Fig. 4 has optical functions such as refraction and diffusion, and the light is distributed by the father, and the base film 2 toward the normal direction is laminated on the jinming The lenticular sheet has the optical layer 21 on the back surface of the base film 2, the optical layer 21 on the surface, and the optical sheet of the first embodiment: 353. The base film 2 and the release layer 3 are The upper optical layer is provided with the same reference numerals and the description thereof is omitted. The sheet laminated on the surface of the base film 2 is formed and formed in the sheet portion 22, the layer of the sheet portion 22 There may be no microlens array 23 on the side of the sheet. Further, the light is formed into the optical layer 21. In summary, the portion 22' is formed only by the microlens array 23. Further, it may be::=臈The optical layer 21 is formed directly on the surface of the surface of the film 2, and the base film 2 of the base material must be integrally formed. The colorless transparent synthetic resin is formed by the formation of a fine resin. As the synthetic tree used for the optical layer 21, for example, ethylene glycol is exemplified. Vinegar, acrylic acid to win the tree:? Ethylene diformate, cellulose acetate, cellulose, weathering Stuffed, polystyrene, polyolefins, alkenyl bean, an active energy ray curable resin. Resin, electron beam hardening type, excellent ultraviolet curable type and strong; s, ray hardening type resin, or transparency. Widely used: human: ethylene terephthalate. Further, in the optical layer 21, in addition to the super-speed synthetic resin, an anti-deteriorating agent, a dispersing agent, etc., such as a filler, a plasticizer, and a stable microlens array 23 are formed of a plurality of 24 systems. r A a 4 is composed. The microlens is formed on the substrate, on the surface side of the substrate film 2, and is (approximate to the shape of the hemisphere). Further, the spherical convex lens is not limited to the above-mentioned semi-', &quot;", microlens of a spherical concave lens. The hemispherical concave 31 201005374 also has an excellent optical work lens microlens and the above micro The lens 24 months, the microlens 24 is densely arranged and disposed on the surface of the substrate film 2 in a few ways. In terms of the body, the microlens 24 is arranged in a 鈇0**-angular lattice pattern. On the surface of the substrate film 2. Therefore, the distance between the material (4) and the A 24 (p) and the distance between the lenses (S) are all fixed. The pattern can be densely arranged with the microlens. Fortunately, the lens 24 is not limited to the above-mentioned regular digonal lattice pattern which can be densely filled, and may also be a square lattice pattern or a random pattern. By the random pattern, the wind system is in the optical system. When the sheet 20 overlaps with other optical members, the generation of the moiré can be reduced. The lower limit of the diameter (d) of the microlens 24 is preferably i 或 or Λ 卜 卜 民, preferably better than i 〇 &quot; m, more preferably 100... Preferably, it is 20... On the other hand, the upper limit of the diameter (8) of the microlens 24 is preferably 100&quot; More preferably 70 "m. If the diameter (D) of the microlens 24 is less than 1 ’, the influence of the diffraction becomes large, which tends to cause a decrease in the light dryness or color separation, resulting in deterioration of quality. On the other hand, if the diameter (D) of the right microlens 24 exceeds 1 〇 # # m, it is liable to cause an increase in thickness or uneven brightness, resulting in deterioration in quality. In addition, by making the diameter (D) of the microlens 24 1 〇〇 or more, the number of microlenses 24 per unit area is reduced, and the area of the optical sheet 2 as the lenticular sheet is increased. It is easy to reduce the technical and cost burden of manufacturing. The lower limit of the surface roughness (Ra) of the microlens 24 is preferably 〇.〇1 # claw, more preferably 0.03 #m. On the other hand, the upper limit of the surface roughness (Ra) of the microlens 24 is preferably 0.1 Å, more preferably 〇 7 . By setting the surface roughness (Ra) of the microlens 24 to the above lower limit or more as described above, 32 201005374, the formability of the microlens array 23 of the optical sheet 20 can be made easy, thereby reducing the manufacturing technique and The burden on the cost. On the other hand, by reducing the surface roughness (Ra) of the microlens 24 to the above upper limit, the scattering of light on the surface of the microlens 24 is lowered, and the condensing function of the microlens 24 or the normal line can be improved. The refractive function on the direction side achieves high luminance in the front direction due to the good optical function. The lower limit (H/R) of the height (H) of the microlens 24 with respect to the radius of curvature (R) is preferably 5/8, more preferably 3/4. On the other hand, the upper limit of the height ratio (H/R) is preferably! . By setting the π-degree ratio (H/R) of the microlens to the above range as described above, the lens refraction in the microlens 24 is effectively exerted, and the optical light such as the condensing of the optical sheet 2 is remarkably improved. Features. The upper limit of the inter-lens distance (s; p_D ) of the microlens 24 with respect to the diameter (D) is preferably 1/2, more preferably 1/5. By setting the inter-lens distance (s) of the microlens 24 to the above upper limit or less as described above, the flat portion which is disadvantageous to the optical function is reduced, and the optical function such as condensing of the optical sheet 20 is remarkably improved. The lower limit of the filling ratio of the microlens 24 is preferably 4% by weight, more preferably 6% by weight. By setting the filling ratio of the microlens 24 to the above lower limit or more as described above, the area occupied by the microlens 24 on the surface of the optical sheet 20 is increased, and the optical function such as condensing of the optical sheet 20 is remarkably improved. Furthermore, the numerical range of the height ratio (H/R), the spacing ratio (S/D) and the filling ratio is based on the brightness of the non-sequential ray tracing using the Monte Carlo method (M〇nte Carl〇) 33 201005374. Analyze the simulation and export it. The lower limit of the refractive index of the material constituting the optical layer 21 is preferably 1.45. On the other hand, the upper limit of the refractive index of the material is preferably '3 ' or more preferably 1.6. In this range, I8' constituting the optical layer 2 is optimally formed by using the refractive index of the optical layer as described above as the above range, thereby effectively exhibiting the refraction of the microlens material, thereby further improving The optical sheet 2. Optical work such as condensing: refracting the manufacturing method of the optical yoke 20, as long as it can be manufactured and is not particularly limited, it is suitable to employ a manufacturing method including the following (4): "The material film forming step" is performed by using a τ type mold Extrusion molding method ' (a = substrate film broadcast body composed of plastic resin; (b) lamination step = composition for laminating anti-adhesive layer on one side of the material film extrudate; (c) stretching step 2 The substrate film extrudate and the anti-adhesive layer layer are stretched; the optical layer is formed on the surface of the base film 2. As a method of forming the optical layer 21, specifically: a) a method of synthesizing the wax and the base film 2 in a sheet having an inverted shape on the surface of the microlens array 23, and peeling off the sheet mold to form the optical layer 21; (1) The resin is reheated and then pressed together with the substrate film 2 = a mold having a reversed shape of the surface of the microlens array 23 and a metal plate, and a method of transferring the shape; 2 having a micro-transparent roller through the peripheral surface a pinch between the (c) and a molten film of the resin and the substrate mirror array a roll mold having a reversed shape of the surface and an extrusion sheet forming method of transferring the above shape; 34 201005374 (d) applying an ultraviolet curable resin to the base film 2, and then extruding the same as described above a method of inverting a shape of a sheet mold, a mold or a roll mold to transfer the shape onto an uncured ultraviolet curable resin and irradiating ultraviolet rays to harden the ultraviolet curable resin; (e) unclamping ultraviolet rays A method in which a curable resin is applied to a mold or a roll mold having the same reverse shape as described above, and is pressed by the base film 2 to be flattened and irradiated with ultraviolet rays to harden the ultraviolet curable resin; (f) a method of forming an uncured (liquid) ultraviolet curable resin or the like from a fine nozzle or releasing it onto a substrate 臈 2 to form a microlens 24 and hardening it; (g) using an electron beam curing resin A method of replacing the ultraviolet curable resin, etc. Further, the base film forming step and the laminating step may be simultaneously performed by a co-extrusion molding method using a T-die. Further, it is also possible to use T The co-extrusion molding method of the mold performs the step of forming the optical layer 21 simultaneously with the substrate film forming step and the laminating step. Specifically, the molten synthetic resin is extruded from the T-die to the peripheral surface and has a microlens The surface of the array 4 23 is a nip between the roll die of the opposite shape and the other, and the pot is hardened, whereby the optical sheet 20 can be simultaneously formed. By the extrusion molding method In the method of stretching the laminate of the base film extrusion and the laminate for the release layer, the laminate of the composition for the release layer is laminated on the surface of the extruded substrate film. In the step and the optical layer forming step, the layering step and the optical layer forming step can be carried out on the same production line as the substrate film forming step 35 201005374 and the stretching step, whereby the optical sheet can be manufactured at a manufacturing cost. That is, as a step of laminating in the production line, improving productivity and work efficiency, and further, as a manufacturing method having a damage (four) which is opposite to the above-described microlens array u:), for example, it can be manufactured by using light:: Forming a speckled three-dimensional pattern on the material, and manipulating the three-dimensional pattern to make a curved surface, thereby fabricating a microlens array model, and then depositing a metal layer on the surface of the microlens array model by electroforming, and then The metal layer is peeled off. Further, as the method of fabricating the microlens array model, the method described in the above (f) may be employed. The optical sheet 20 has a high concentration of light, such as refraction and diffusion toward the normal direction side by the microlens array 23, and can easily and surely control its optical function. Therefore, the optical 4 can, for example, control the peak direction of incident light rays toward the pupil of the backlight unit to be controlled at an inclination angle optimum for the refraction toward the normal direction side. In addition, the optical sheet has a higher anti-adhesive property, uniformity of light transmittance, brightness, etc., economy, and film properties by the anti-adhesive|3. Further, the above-mentioned "microlens" means a partial spherical surface, a microlens such as a hemispherical convex lens or a hemispherical concave lens. The so-called straight (E))", the diameter of the base or opening of the microlens. The term "height" refers to the vertical distance from the base surface to the top of the microlens when the microlens is a convex lens. When the microlens is a concave lens, it refers to the open surface of the microlens. The vertical distance to the bottom. The term "inter-lens distance" means the shortest distance between one of the adjacent pairs of microlenses 36 201005374. The "filling rate" refers to the area ratio of the microlens per unit area in the surface projection shape. The "triangular lattice pattern" refers to a pattern in which the surface is divided into three (four) of the same shape, and the microlenses are arranged at the respective vertices of the regular triangle.

The backlight unit for a liquid crystal display device of the present invention includes a square light guide plate, a light source disposed along a long side edge of the light guide plate, and a light optical sheet such as a light diffusion sheet or a slab laminated on the surface of the light guide plate; The optical sheet 11 and the second sheet are used as the light diffusion sheet and the sheet #. Because the optical sheet has the higher uniformity, economy, and "sex" of the anti-adhesive property, the total light transmittance, the brightness, and the like, the backlight unit can significantly improve the utilization efficiency of the light emitted by the light source. Further, the optical sheet and the backlight unit of the present invention are not limited to the above-described embodiments. For example, the optical sheet is not limited. The light diffusing sheet and the microlens sheet can also be applied to other optical sheets such as a scorpion sheet, a lenticular lens sheet, and a lenticular lens sheet. The anti-adhesive layer is laminated on the enamel sheet and the lentil lens sheet. The back surface of the optical sheet such as the cyrillic lens sheet can improve the uniformity, economy and film properties of the anti-sticking property, the total light transmittance, the brightness, etc. In addition to the substrate film, the optical layer and the anti-adhesive layer, Further, other layers such as an ultraviolet ray (iv) u, an antistatic agent layer, and an overcoat layer may be laminated on the optical sheet. Further, the polymer composition may further contain an ultraviolet absorber as described above. Containing purple The polymer composition forming agent 6' of the line absorbent can impart ultraviolet ray resistance to the optical sheet, thereby preventing the liquid crystal layer from being damaged by ultraviolet rays from the backlight sheet 37 201005374 The absorbent is not particularly limited as long as it is a compound which can absorb ultraviolet rays and is efficiently converted into heat energy and is stable to light. The towel preferably has a high ultraviolet absorbing function and the above-mentioned base. The compatibility of the material polymer is good, and the water-based acid-based ultraviolet absorber and the benzotriazole-based ultraviolet absorber are stably present in the substrate to polymerize 'benzophenone-based ultraviolet absorption and cyanoacrylate. The ester-based ultraviolet absorber; one or two or more selected from the group of the above-mentioned groups can be used. Further, as the ultraviolet (four), a polymer having an ultraviolet absorbing group of the split towel can be preferably used (for example, The compatibility of the main polymer with UV 6 in the molecular chain manufactured by Nippon Shokubai Co., Ltd.

Yudaburu UV" series, etc.). By absorbing the polymer of the line, it is high in adhesion to the binder, thereby preventing the inferiority of the ultraviolet absorbing function due to bleeding of the ultraviolet absorber or the like. Further, a polymer having an ultraviolet absorbing group in a molecular chain may be used as a base polymer of the binder 6, and X may also be a polymer having an ultraviolet absorbing group bonded thereto as a binder &6 &lt; Further, the base polymer may further contain an ultraviolet absorber, and the ultraviolet absorption function may be further enhanced. The lower limit of the ultraviolet absorber with respect to the viscosity is preferably 0.1% by mass and % by mass, and the above-mentioned % by mass of the ultraviolet absorber is preferably 5% by mass. The reason for this is that if the % is purple, it is more preferable that the outer absorbent is not more effective than the base polymer optical sheet, and the content of the base polymer of the ultraviolet compound 6 is preferably 1% by mass, preferably the upper limit of the amount of 3 Preferably, the mass ratio of 1 〇 mass is less than the lower limit, and the absorption function; on the other hand, if the mass ratio of the ultraviolet ray 38 201005374 absorbent exceeds the above upper limit, the substrate concentration is affected, and the strength of the adhesive 6 is caused, In the case of durability, etc., it is not possible to use a UV stabilizer (a base polymer containing a molecular bond and a right stabilizer) instead of the above, , and琛 琛 absorbent, UV stabilizer and UV absorber at the same time make ^, the agent, can make the free radicals generated by ultraviolet rays, activity = UV stabilized 丨 虱 虱 4 deactivation, high UV stability, (four) and so on. As the strand stabilizer, a hindered amine-based ultraviolet release agent having high stability against ultraviolet rays can be suitably used. Further, the combination of the ultraviolet absorber and the ultraviolet stabilizer is used to significantly improve the deterioration of the ultraviolet rays and the weather resistance. EXAMPLES Hereinafter, the present invention will be described in detail based on the examples, but the present invention is not limitedly construed based on the δ loading of the examples. [Example 1] Polyethylene terephthalate (hereinafter referred to as "ΡΕΤ") was supplied to a butadiene core to perform extrusion molding to form a double FhT crucible extrudate, and this p-ruthenium film extrudate was extruded. Stretching the gentleman's 3 seven in the length direction of the film. Next, a 100 parts polyester polyhydric A/r alcohol ("Vylonal MD1250" manufactured by Tosoh Textile Co., Ltd.) and 12 parts of bismuth isophthalate (manufactured by Sigma-Industrial Pharmaceutical Co., Ltd.) were prepared. Elastron H-3, ) π ”^, and 50 parts of colloidal oxidized dreams with an average particle size of 100 nm

The composition for the toxic layer is applied to the PET, the M extrudate by a roll coating method to form the anti-adhesive layer, and the layer of the object and the above-mentioned ΡΕτ „ 积 The laminate of the film extrusion. Then, the laminate is stretched to 3 times along the width direction of the film, and stretched to 3 times, thereby obtaining a substrate for an optical sheet having an average thickness of 丨88 39 201005374 (prevention The average thickness of the adhesive layer is 〇〇 〇〇.) These steps are carried out continuously on the same production line. Secondly, the acrylic acid polyol is contained in a solid content conversion (manufactured by Dairi Seiki Co., Ltd.) 100 parts of the polymer composition of the hardener ("C.") A resin bead ("ΜΒχ_ΐ5" manufactured by Sekisui Kogyo Co., Ltd.) was used to produce a composition for an optical layer. The composition for an optical layer is applied to the surface of the substrate sheet for an optical sheet by a roll coating method to be 15 Å (in terms of solid content), and is cured, thereby forming an optical layer, and finally cutting. An optical sheet of Example was obtained in a 20 cm square. [Example 2] The same anti-adhesive layer composition and PET as those used in the Example were supplied to a multilayer mold, respectively, and then formed into a multi-layer mold, thereby forming a composition for preventing the hiding layer. A coextruded formed body composed of a layer of material and a PET crucible extrudate. Then, the co-extruded molded body was simultaneously biaxially stretched at a stretching ratio of 3 times in the film length direction and 3 times in the film width direction, thereby obtaining a substrate sheet for an optical sheet having an average thickness of 188 Å. (the average thickness of the anti-adhesive layer is 100 nm). These steps are all carried out continuously on the same production line. And 'Next' in the same way as the implementation of the &quot;

The optical film of Example 2 was obtained by coating the object on the surface of the substrate sheet for the optical sheet, and forming an optical layer, and cutting it into 20 cm square. [Comparative Example] A film made of transparent polyethylene terephthalate 201005374 with a thickness of 188 core as a base film was used as a composition for an optical layer, and a photonic layer composition of the same as in the above Example 1 was used. As a composition for the anti-adhesive layer, an acrylic polyol containing #1GG parts (RUB MEDIUM SA manufactured by Daisei Seiki Co., Ltd.) and 5 parts of a hardener (Japanese polyamine) in terms of solid content conversion

The polymer composition of "Cor〇nateHX" manufactured by Ester Co., Ltd. contains U-injury average granules #3#m of propylene fosphate resin beads ("dirty _3" manufactured by Sekisui Kogyo Co., Ltd.) The composition of the composition. The composition for the optical layer was laminated on the surface of the base (4) in a manner of 15 g/m 2 (in terms of solid content). The composition for the release layer was laminated to 3 g / m 2 (in terms of solid content). The back surface of the substrate film, #本得#Comparative example. [Evaluation of Characteristics] Using the optical sheets of the above Examples 1 and 2 and the optical sheets of the comparative examples, the evaluation of the anti-adhesive properties of the optical sheets, and the relative values of the total light transmittance, the haze value, and the front luminance Determination. The results are shown in the following Table i. The anti-adhesive property is to be placed under the environmental test conditions (7〇ciCxRH95%) for 24 hours in the state where the back surface of the optical sheet is overlapped with the acrylic sheet at a water interval, and an optical sheet and an acrylic sheet are tried. In the case of peeling, the case where the peeling is easy is evaluated as Q, and the price of the material which is not easily peeled off is χ. Further, the relative values of the total light transmittance, the fog value, and the front luminance were measured in accordance with jis_k7i〇5 using a fog value meter manufactured by Suga Test Instrument Co., Ltd. 41 201005374 . [Table 1] Evaluation of anti-sticking property Total light transmittance (Tt) Haze value positive degree of relative value Example 1 〇69.5 95.8 102 Example 2 〇69.0 95.7 101 Comparative Example X 67.9 95.7 1〇〇 (above The unit of the numerical value is all [%]. As shown in the above Table i, the optical sheets of Examples 丄 and 2 are compared with the optical sheets of the comparative example, and have a high anti-adhesion &amp; Relative values of light rate, fog value and front brightness. Further, the arithmetic mean roughness (Ra), the maximum height (Ry), and the ten-point average roughness (Rz) of the back surface of the anti-adhesive layer of the optical sheet of Example i were measured, and the results were 0.09, 〇.63 (4), respectively. And 〇 52 hearts. The pencil hardness of the anti-adhesive layer of the optical sheet A Η 〜 2 Η β The calculation of the surface properties: Average roughness (Ra) 'Maximum height (Ry) and ten-point average roughness (V), : According to JIS deletion 01_1994, the cutoff wavelength λ c is set to 2 5 faces, the evaluation length is not 12.5 mm, and the stylus type surface roughness measuring machine r Surfc〇m 47〇A manufactured by Tokyo Precision Co., Ltd. is used for the clothing industry. As described above, the constituent elements of the optical sheet m乍 liquid crystal display unit of the invention of the invention are particularly suitable for a transmissive liquid crystal display device. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing an unintentional cross section of an optical sheet according to an embodiment of the present invention 42 201005374. Figure 2 is a schematic bottom view of the optical sheet of Figure 1. Fig. 3 is a schematic cross-sectional view showing an optical sheet different from the optical sheet of Fig. 1. Fig. 4 is a schematic cross-sectional view showing an optical sheet different from the optical sheet of Figs. 1 and 3. Fig. 5(a) is a schematic perspective view showing a conventional end face illumination type backlight unit, and Fig. 5(b) is a schematic cross-sectional view showing a general optical sheet. [Main component symbol description] 1 '11, 20 optical sheet 2, 55 base film 3 &gt; 12 '57 anti-adhesive layer 4, 21 optical layer 5 filler 5a small-diameter filler 5b large-diameter filler 6, 9, 58 ' 60 Adhesive 7, 7a, 7b Projection 8' 59 Light diffusing agent 10 Polymer 22 Sheet portion 23 Microlens array 24 Microlens 50 End-illuminated backlight unit 43 201005374

51 52 53 54 54a 56 61 DHPRST Linear Light Source Light Guide Light Diffuser Prism Piece Prism Light Diffusion Layer Resin Bead Microlens 24 Diameter Microlens 24 Height Microlens 24 Between Curvature Radius of Microlens 24 Lens Average thickness of the flat portion 44

Claims (1)

201005374 Dingwei's Scope of Circulation ···················································· Anti-adhesive layer The anti-adhesive layer contains a filler and a resin-made adhesive. Below the flat portion of the anti-adhesive layer, the thickness of the dry sentence is 50 nm or more, 150 nm to + H ^ 7 () nm or more, and (10) below. 2. The optical sheet of claim 1, wherein: the average particle size of the filler is greater than the average thickness of the flat portion of the release layer. 3. For the optical sheet of claim 1 of the patent scope, wherein: _ ° hai filler contains a small diameter filler of a main component, and a large diameter filler having an average particle diameter larger than a subcomponent of the small diameter filler, 6 HAI small diameter filler The average particle diameter is 50 mn or more and 15 〇 nm or less. 4. For the optical sheet of claim 1, wherein the content of the filler in the anti-adhesion layer is 2% by mass or more and 5 〇 or less. 5. The optical sheet of claim 1, wherein: the polymer constituting the binder has a three-dimensional crosslinked structure. 6. The optical sheet of claim ii, wherein: the viscous sword is formed from a polymer composition comprising an acrylic polyol and a hardener. 7. The optical sheet of claim 1 wherein the filler is a colloidal cerium oxide. 45 201005374 8. An optical sheet according to item 3 of the patent application, wherein the coefficient of variation of the particle size distribution of the filler is 2. % or less As in the optical sheet of Patent Application No. 1, straight: The anti-adhesive layer contains an antistatic agent dispersed therein. ',. Among them: 1 〇. As claimed in the patent scope of the first optical sheet, the optical layer contains a light diffusing agent and its binder. Among them: 1. The optical sheet of claim 1 of the patent scope, its optical layer It has a fine concavo-convex shape with refraction and annotation. The light source for the liquid crystal display device is dispersed and guided to the side of the surface, and is characterized in that it is an optical sheet of any one of the patent application scopes. , pattern: (such as the next page) 46