TW200912388A - Peak-valley pattern formed sheet and method for producing the same - Google Patents

Abstract

A peak-valley pattern formed sheet having a resin substrate; a resin rigid layer formed on one side of the resin substrate; and a peak-valley pattern formed on a surface of the rigid layer, wherein the difference (T2-T1) between the glass transformation temperature T2 of a resin forming the rigid layer and the glass transformation temperature T1 of a resin forming the substrate is 10 DEG C or more; and the average depth of a valley portion of the peak-valley pattern is 10% or more to the most frequent pitch of the peak-valley pattern as 100%, and the method for producing the same are provided.

Description

[Technical Field] The present invention relates to a concave-convex pattern forming sheet provided in a light diffusing body and a method of manufacturing the same. Further, the present invention relates to a light diffusing body which forms a sheet using a concave-convex pattern. Further, the present invention relates to an engineering sheet original for optical diffuser production which is used as a mold for producing a light diffusing body having a concave-convex pattern formed on its surface. Further, the present invention relates to a method of producing a light diffuser. The present invention relates to an optical sheet and a light diffusing sheet which are used as a light diffusion sheet or the like. The present invention relates to a diffusing light guide that diffuses light from a light source. Further, the present invention relates to a backlight unit provided in a liquid crystal display device. The present invention relates to a concave-convex pattern forming sheet provided in an optical element such as an antireflection body or a phase difference plate, and a method of manufacturing the same. Further, the present invention relates to an antireflection body and a phase difference plate using a concave-convex pattern forming sheet. Further, the present invention relates to an engineering sheet for optical element manufacturing which is used as a mold for producing an optical element having a concave-convex pattern. The present application is based on Japanese Patent Application No. 2007-040694, filed on Feb. 21, 2007, and Japanese Patent Application No. 2007-040694, filed on Jun. 7, 2007. Japanese Patent Application No. 2007-15 1677, which was filed in Japan on June 7, 2007, and Japanese Patent Application No. 2007-15, 17%, and 2, 7 years, which were filed in Japan on June 7, 2007. The Japanese Patent Application No. 2007-261176 filed on the Japanese Patent Application No. 2007-261176, the priority of which is hereby incorporated by reference. [Prior Art] ‘In general, a concave-convex pattern formed on the surface with a strong ππ π : ^ J skin-like concave-convex pattern is used as a light diffuser. For example, Patent Document 1 discloses that a light diffuser is not used as a light diffuser in which a concave-convex pattern is formed, and a plurality of protrusions are formed on at least one surface of a light-transmitting substrate, and the height of the protrusions is disclosed. For 2~2〇, the apex of the protrusion is 1~10 μιη, and the aspect ratio of the empty/μ dog is 1 or more. Further, in Patent Document i, there is disclosed a method of forming a protrusion, that is, the surface of the light-transmitting substrate is processed by irradiation of the bundle by KrF quasi-spraying or the like. Patent Document 2 discloses a light diffusing body in which an anisotropic diffusion pattern composed of wavy irregularities is formed on the surface. Further, Patent Document 2 discloses a method of forming an anisotropic diffusion pattern, that is, 'exposing and developing a film of a photosensitive resin by irradiating laser light, and forming a bump on the surface of the crucible. The master hologram transfers the master hologram onto a metal mold and uses the metal mold to shape the resin. [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei. No. Hei. No. Hei. No. Hei. A sheet on which irregularities are formed, for example, 'Patent Document 3' discloses a light-diffusing sheet in which a large number of dot-like convex portions are formed on the surface of the substrate. In the optical sheet disclosed in Patent Document 3, ink is ejected onto a substrate by an inkjet method and fixed to form a dot-like convex portion. Japanese Laid-Open Patent Publication No. 2004-157430 discloses that a concave-convex pattern composed of fine wavy irregularities is formed on a surface, and a concave-convex pattern in which the most frequent pitch of the concave-convex pattern is below the wavelength of visible light is known. The furnace sheet can be used as an optical element such as an antireflection body or a phase difference plate (see Non-Patent Document 1). The reason why the uneven pattern forming sheet can be used as an antireflection body is as follows: When the uneven pattern is not provided on the surface of the sheet, reflection occurs due to a sudden change in the refractive index at the interface between the sheet and the air. However, when a wavy concave-convex pattern is provided on the surface of the sheet, that is, at the interface between the sheet and the air, the refractive index value is between the refractive index of the air and the refractive index of the concave-convex pattern forming sheet in the portion of the concave-convex pattern. The value (hereinafter referred to as an intermediate refractive index), and the intermediate refractive index continuously changes in the depth direction of the concave-convex pattern. Specifically, the deeper the position, the closer to the refractive index of the concave-convex pattern forming sheet. Since the intermediate refractive index changes continuously as described above, the sharp change in the refractive index at the interface as described above is not caused, so that the reflection of light can be suppressed. Further, when the distance between the concave-convex patterns is equal to or less than the wavelength of visible light, it is difficult to cause coloring due to interference of visible light, i.e., visible light, in the concave-convex pattern portion. Further, the reason why the concave-convex pattern forming sheet can be used as the phase difference plate is that the air and the concave-convex pattern forming sheet which are different in refractive index from each other in the portion of the concave-convex pattern are alternately arranged, and as a result, optical anisotropy is exhibited to the light. & However, when the distance between the concave and convex patterns is the same as the wavelength of visible light or below the wavelength of visible light, t exhibits the phenomenon of displaying the same phase difference in a wide visible light wavelength region. 126510.doc 200912388 2 is a specific example of the above-mentioned concave-convex pattern forming sheet. For example, in Non-Patent Document 1, a seed sheet is proposed, and a heated metal sheet composed of polydimethyl siloxane is steamed to form a metal. The layer 'following is followed by shrinking the sheet composed of poly-methyl oxy-oxygen to form a wavy concave-convex pattern on the surface of the metal layer. Patent Document 4 proposes that a seed sheet 'on the surface of the heat-shrinkable synthetic resin ^' sequentially forms a base layer and a metal layer, and thereafter heat-shrinks the heat-shrinkable resin into a resin film to form a surface of the metal layer. Wavy embossed pattern. In Patent Document 5t, a seed sheet is formed, and a layer composed of a material which is volume-shrinked by exposure processing is formed, and the layer is subjected to exposure treatment to form irregularities on the surface. None of the concave-convex pattern forming sheets disclosed in Patent Documents 4 and 5 and Non-Patent Document 2 shows excellent performance as an optical element. Specifically, when used as an antireflection body, reflection cannot be made. The rate is sufficiently low, and when used as a phase difference plate, the phase difference cannot be sufficiently large, and the same phase difference cannot be generated over the wide wavelength region. Further, as a method of producing a embossed pattern, a light lithography method using visible light using a pattern mask is known as a method of forming a embossed pattern of 凹凸 Λ ΰ gt 丄 。 。 。 。 。 。 。 。 。 。 。 。 。. However, this method cannot produce a concavo-convex pattern forming sheet which can be used as an optical element and has a distance between the wavelengths of light. Therefore, it is necessary to carry out a finer reinforcement of the material line #射干扰法 or electron ray lithography. These methods are: exposing and developing a photoresist layer formed on a substrate by using ultraviolet laser interference light or electron rays to form a photoresist pattern layer, and using the photoresist pattern layer as a mask, using dry remnant 126510.doc 200912388 The method forms a concave-convex shape. However, when the ultraviolet laser interference interferometric ray lithography method is applied, there are the following problems, and although the electric power is processed in a wide area of more than 1 〇 cm, it is not suitable for mass production. Further, in Patent Document 6, a method is proposed in which a particle layer is placed on a substrate, and the particle layer is used as a residual material to dry the surface of the substrate. However, in this case, there is also a problem that it is difficult to process in a wide area of more than 3 ticks, and thus it is not suitable for mass production. [Patent Document 4] Japanese Laid-Open Patent Publication No. JP-A No. Hei. No. Hei. No. Hei. No. Hei. Bulletin [Non-Patent Document 1] Kikuda Kyuo and Iwata Tatsuya, "Optics", Sakamoto Optical Publishing, Vol. 27, No. 1, 1998, p. 12-17 [Non-Patent Document 2] Ned. (Ned B〇wden) Waiting for "Nature", No. 393, 1998, p 146 [Summary of the Invention] [Problems to be Solved by the Invention] The light diffusion systems disclosed in Patent Documents 1 and 2 are sufficient. Light diffuser. However, there is a problem that the method of processing energy beam irradiation disclosed in Patent Document 1 and the method of exposing and developing a photosensitive resin film by laser using the laser disclosed in Patent Document 2 are complicated. Further, it cannot be said that the diffusion of the light diffusing body of Patent Documents 1 and 2 is sufficient. The present invention has been made in view of the above circumstances, and an object thereof is to provide a concavo-convex pattern forming sheet which can be used as a light diffusing body and which can be easily manufactured. Further, an object of the present invention is to provide a method for producing a concave-convex pattern forming sheet which can easily produce a concave-convex pattern forming sheet of I26510.doc-10-200912388 which is used as a light diffusing body. Further, it is an object of the present invention to provide a light diffuser excellent in diffusion anisotropy. Further, an object of the present invention is to provide an engineering sheet for producing a light-diffusing body and a method for producing a light-diffusing body, which can be manufactured in a simple and large-scale manner, and has a maximum frequency spacing between the concave-convex pattern-forming sheet and A light diffuser having a concave-convex pattern having the same average depth. When it is desired to control the diffusion and reflection of light by the concavities and convexities, if the distance between the concavo-convex portions is about the wavelength of light, coloring due to interference may occur, and if the interval exceeds the number! 0 μΓη may be recognized as a bright line or the like. Therefore, it is required to set the interval between the uneven portions to 20 μηι or less. However, in the optical sheet disclosed in Patent Document 3, when the interval between the uneven portions is several tens of micrometers to several hundreds of micrometers, the interval can be stably formed, but when the interval between the uneven portions is 20 μm or less, it is difficult to obtain The required interval. Further, in the optical sheet, the optical characteristics such as light diffusibility are not uniform, but the optical characteristics are not uniform, and may be high or low at a specific position. For example, in the light guide plate used in the backlight unit of the liquid crystal display, in order to prevent the image of the linear light source disposed on the side end surface thereof from being reflected on the surface of the light guide plate, it is sometimes necessary to lift the light near the linear light source. Light diffusing property of the side surface. When a direct type backlight unit having a plurality of linear light sources or point light sources is used in a liquid crystal display, sometimes the linear light source or the point light source is directly above the linear light source or the point light source. Need to improve light diffusivity. In order to adjust the optical sheets having irregularities on the surface to make the optical characteristics non-uniform, it is conceivable to change the interval between the uneven portions depending on the position, but the uneven portions are provided at intervals of 126510.doc 200912388. Therefore, in the optical sheet disclosed in Patent Document 3, which is high or low in the position of the document 3, it is difficult to make the optical characteristics of the optical sheet which is difficult to change the interval to be particularly uniform after the optical sheet of 20 μη or less. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an optical sheet which is excellent in optical expansion and which is easy to be optically uneven. Further, it is an object of the present invention to provide a target ^^^ 0 九A light-diffusing sheet which is excellent in diffusibility and which is easy to be uneven in light diffusing property. The nine-body such as the diffusion-conducting π-form disclosed in Patent Documents 1 and 2 has insufficient anisotropy of light diffusion.撼私道,# The backlight unit of the 胥忒寺 expansion light guide cannot diffuse the light from the light source sufficiently anisotropically. Therefore, the redundancy of the light emitted from the diffused light guide will vary depending The image brightness of the device is uneven. It is an object of the present invention to provide a diffusing light guide and a backlight unit that can sufficiently diffuse light from a light source. i The object of the present invention is to provide an anti-reflection A concave-convex pattern forming sheet exhibiting excellent performance when an optical element such as a body or a phase difference plate is used. Further, it is an object of the present invention to provide a simple, large-area, and large-scale manufacture of the above. A method for producing a concave-convex pattern forming sheet of a convex pattern forming sheet. Further, an object of the present invention is to provide an anti-reflecting body having a low reflectance and a phase difference plate which generates the same phase difference over a wide wavelength region. Further, the present invention It is an object of the invention to provide an optical element for manufacturing an optical element, which can easily and in large quantities produce an optical element having a concave-convex pattern having the same frequency spacing and average depth as that of the concave-convex pattern forming sheet. 126510.doc -12- 200912388 [Solution of the problem] Technical Solution The present invention includes the following aspects: a π]-concave-convex pattern forming sheet comprising a resin substrate and a resin hard layer provided on one surface of the substrate, and the hard layer is A concave-convex pattern along one direction is formed on the surface, and the difference between the glass transition temperature τα of the resin constituting the hard layer and the glass transition temperature Tgl of the resin constituting the substrate (D-82-D § 1) is 10. The mode-to-frequency spacing of the pattern exceeds the μηι and is 20 μηι or less, and the average depth of the bottom of the concave-convex pattern is i0% or more when the above-mentioned minimum frequency spacing is 100%. [2] A method for producing a concave-convex pattern forming sheet, comprising the steps of 'supplied to a resin having a smooth surface and a thickness exceeding 0.05 and 5. 〇μπι or less on the surface i of the resin recording material Forming a hard layer to form a laminated sheet, and deforming at least a hard layer of the laminated sheet in a folded manner; and the hard layer is made of a resin having a glass transition temperature higher than 1 o ° C or more than a resin constituting the substrate [3] The method for producing a concavo-convex pattern forming sheet according to [2], wherein the step of deforming the hard layer into a resin base material and deforming the hard layer in a most fold manner The sheet is heated to: :: shrink the heat shrinkable film. ° (4) - Light diffusing body 'The concave-convex pattern forming (1) is formed, and the base material and the hard layer of the convex pattern forming sheet are transparent. [5] A concave-convex pattern forming sheet comprising: a resin base material; and a resin hard layer provided on a surface of the base material; a concave-convex pattern along the − direction is formed on the hard surface 'The hard layer consists of metal or gold 126510.doc •13- 200912388 genus compound, and the FB_Anμηι convex pattern has a most frequent spacing of more than 1 μηη and is less than 20, and the embossed pattern is numb;

The average depth of &amp; ° is 10% or more when 100% of the above-mentioned maximum frequency spacing is set. [6] The concave-convex pattern of [5] is Φ into a sheet, wherein the hard layer is made of metal. [7] The concave-convex pattern forming sheet of [5] wherein the metal is selected from the group consisting of gold, aluminum, silver, carbon, copper, bismuth, indium, magnesium 'rhenium, palladium, lead, platinum, rhodium, tin, titanium, vanadium, At least one metal in the group consisting of words and defamation. The m-type concave-convex pattern-forming sheet is characterized in that it comprises a step of providing a metal or metal compound having a smooth surface and a thickness exceeding 0.01 μm and being 〇.2 _ or less on the surface of the resin substrate. The hard layer is formed by Φ into a laminate sheet, and at least the hard layer of the laminate sheet is deformed in a folded manner; and the hard layer is composed of a metal or a metal compound. [9] A method for producing a concave-convex pattern forming sheet according to m, wherein a uniaxial direction heat shrinkable film is used as a resin substrate, and in the step of deforming the hard layer in a folded manner, the laminated sheet is heated The uniaxially oriented heat shrinkable film is shrunk.工程 — — — — — — — — 工程 工程 工程 工程 工程 工程 工程 工程 工程 工程 工程 工程 工程 工程 工程 工程 工程 工程 工程 工程 工程 工程 工程 工程 工程 工程 工程 凹凸 凹凸 凹凸 凹凸 凹凸 凹凸 凹凸 凹凸 凹凸 凹凸 凹凸 凹凸 凹凸 凹凸It is used as a mold of a light diffuser having the same pitch and the same depth and the same average depth. [11] A method for producing a light-diffusing body, comprising the steps of: applying an uncured curable resin to a surface on which a concave-convex pattern is formed on an original sheet for producing a light-diffusing body of [1〇]; The curable resin is cured, and then the cured coating film is peeled off from the engineering moon original. 126510.doc • 14-200912388 U2] A method for producing a light diffusing body, comprising the steps of: contacting a sheet-like thermoplastic resin with a concave-convex pattern formed by contacting an original sheet of a light-diffusing body for manufacturing [10] The sheet-shaped thermoplastic resin is pressed against the original sheet of the engineering sheet and heated in this state to soften it, and then cooled; and the cooled sheet-shaped thermoplastic resin is peeled off from the original sheet of the engineering sheet. . [13] A method for producing a light diffusing body, comprising the steps of: laminating a concave-convex pattern transfer material on a surface on which a concave-convex pattern is formed on an original sheet for producing a light-diffusing body of [1〇]; The concave-convex pattern transfer material laminated on the concave-convex pattern is peeled off from the original sheet to produce a secondary engineering molded product; and the secondary engineering molded article is in contact with the concave-convex pattern of the original sheet of the engineering sheet On the surface, the uncured curable resin is applied; and after the curable resin is cured, the cured coating film is peeled off from the secondary engineering molded article. [14] The method for producing a light diffusing body, comprising the step of: laminating a concave-convex pattern transfer material on a surface on which a concave-convex pattern is formed on a one-pass original or a plate for producing a light diffuser according to [10]; The concave-convex pattern transfer material laminated on the concave-convex pattern is peeled off from the above-mentioned sheet to prepare a molded article for two-time engineering, and the sheet-shaped thermoplastic resin is brought into contact with a molded article for one time. The surface of the original sheet of the above-mentioned engineering sheet is contacted with one side of the surface of the original sheet; the sheet-shaped thermoplastic resin is pressed against the -4, one-man engineering molded article, and heated in this state. It is softened and cooled in total; and the cooled & sheet-like thermoplastic resin is peeled off from the secondary engineering molded article. 126510.doc -15. 200912388 [15] An optical sheet </ RTI> characterized in that a concave-convex region having irregularities is dispersedly disposed on one side or both sides of the flat surface. [16] The optical sheet of [15], wherein the uneven regions are unevenly arranged. Π 7] A light diffusing sheet comprising the optical sheet of [15]. [18] The light-diffusing sheet of [17] wherein the most frequent pitch A of the unevenness in the concave-convex region exceeds 1 and is 20 μm or less, and the ratio of the average depth B of the unevenness to the most frequent spacing Α (Β/Α) is 0.1~3_0. [19] The light diffusing sheet of [18], wherein the concave and convex regions are dotted in a dotted manner. [20] A diffusing light guide body comprising: a transparent resin layer having a meandering wave-like concave-convex pattern formed on one surface thereof, wherein the most frequent pitch of the concave-convex pattern exceeds 1·〇μηι and is 20 μm Hereinafter, the ratio (Β/Α) of the average depth 3 of the unevenness to the most frequent spacing Α is 0.1 to 3.0. [21] A backlight unit comprising: [2〇] a diffused light guide; and a reflector that faces a surface of the diffused light guide opposite to a surface on which the uneven pattern is formed; And a light source disposed between the diffusion light guide and the reflector. [22] A backlight unit comprising: a diffusion light guide of [2〇]; and a reflector that faces a surface of the diffusion light guide opposite to a surface on which the uneven pattern is formed; And a light source adjacent to any one of the sides of the diffusion light guide. [23] A concave-convex pattern forming sheet comprising: a resin base material; and a resin hard layer provided on at least a part of an outer surface of the base material; and the hard layer has a corrugated concave-convex pattern constituting The difference between the glass transition temperature Tgz of the resin of the hard layer and the glass transition temperature Tgi 126510.doc -16-200912388 of the resin constituting the substrate (Tg2-Tgl)^0. . As described above, the most frequent pitch of the concave-convex pattern is ..., and the average depth of the bottom of the concave-convex pattern is such that the above-described maximum frequency spacing is set to 100 °/. More than 10% of the time. [24] A method for forming a embossed pattern forming sheet, which comprises the following steps, comprising: arranging a resin having a smooth surface on at least a part of an outer surface of a resin substrate; &amp;, to form a laminated sheet; and to make the hard layer of the laminated sheet to be serpentinely deformed; and the hard layer is higher in temperature than the resin constituting the substrate by the glass transition temperature. It is composed of the above resins. [25] An antireflection body comprising the concavo-convex pattern forming sheet of [23]. [26] A phase difference plate comprising the concavo-convex pattern forming sheet of [23]. [27] An engineering sheet for producing an optical element, comprising the feature of the concavo-convex pattern forming sheet of [23], which is used for manufacturing a concavo-convex pattern having the same frequency-to-frequency spacing and average depth as that of the concavo-convex pattern forming sheet. It is used as a mold for optical components. [Effects of the Invention] The uneven pattern forming sheet of the present invention can be used as a light diffuser and can be easily produced. According to the manufacturing method of the uneven pattern of the present invention, the concave-convex pattern forming sheet used as the light diffusing body can be easily produced. The light diffuser of the present invention is excellent in the anisotropy of diffusion. According to the method for producing a light-diffusing material for producing a light-emitting material of the present invention and the method for producing a light-diffusing body, a light-diffusing body in which a concave-convex pattern having the same frequency pitch and average depth as that of the uneven pattern-forming sheet is formed can be easily and widely produced. The optical sheet of the present invention has excellent target optical characteristics, and can make the optical characteristics 126510.doc • 17- 200912388 easy to be uneven. The light-diffusing sheet of the present invention is excellent in target light diffusibility and can be made to be uneven in light diffusibility. According to the diffusing light guide and the backlight unit of the present invention, light from the light source can be sufficiently anisotropically diffused. The uneven pattern forming sheet of the present invention can be preferably used as an optical element such as an antireflection body or a phase difference plate. Further, the uneven pattern forming sheet of the present invention can be preferably used as an engineering sheet for producing an optical element, and the engineering sheet for producing an optical element is used as a mold for producing an optical element having a corrugated pattern. In the method for producing a concave-convex pattern-forming sheet of the present invention, the fine uneven pattern can be formed on the surface in a large area. Therefore, the uneven pattern-forming sheet which can be preferably used for an optical element or the like can be easily and widely produced. The antireflection system of the present invention has low reflectance and excellent performance. The phase difference plate of the present invention can produce the same phase difference over a wide wavelength region and has excellent performance. By using the engineering sheet for optical element manufacturing of the present invention, an optical element having the same uneven pattern and the same average depth as the groove pattern forming sheet can be easily and largely produced. [Embodiment] 1. Concavo-convex pattern forming sheet (concavo-convex pattern forming sheet-1) Hereinafter, an embodiment of the concavo-convex pattern forming sheet of the present invention will be described. 126510.doc 18- 200912388 Figs. 1 and 2 show a concave-convex pattern forming sheet of this embodiment. The uneven pattern forming sheet 10 of the present embodiment includes a base material 11 and a hard layer 12 provided on one surface of the base material 11, and the hard layer 12 has a concave-convex pattern 12a. The uneven pattern 12a on the uneven pattern forming sheet 10 has corrugated irregularities along substantially one direction, and the corrugated irregularities are meandering. Further, the tip end of the convex portion of the concave-convex pattern 12a of the present embodiment has a curvature. The difference (TgyTg丨) between the glass transition temperature Tg2 of the resin constituting the hard layer 12 (hereinafter referred to as the second resin) and the glass transition temperature Tg! of the resin constituting the substrate U (hereinafter referred to as the first resin) is 10 Above °C, it is preferably 2 (TC or more 'more preferably 30. (: above. Since the difference of (Tg2-Tgl) is 1 〇. 〇 or more, it can be at a temperature between Tg2 and Tgt It is easy to process. If the temperature between Tg2 and Tgl is used as the processing temperature, it can be processed under the condition that the Young's modulus of the substrate is higher than the Young's modulus of the hard layer 12, and the result can be in the hard layer. It is easy to form the concavo-convex pattern 12a on the 12th. Further, from the viewpoint of economy, there is a lack of necessity to use a resin having a Tg2 of more than 4 〇 (rc, and there is no Tgl lower than _15 (rc resin), so (Tg2_T cited) Preferably, it is 550 C or less, and more preferably 2 〇〇. 〇 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 The difference in Young's modulus is better than 疋O.OUOO GPa, and the better is 〇i〇Gpa. The degree is, for example, the heating temperature at the time of the contraction of the concave-convex pattern forming sheet in the following method, and the Young's modulus is a value measured according to JIS Κ 7113-1995. The glass transition temperature Tgi of the tree sorghum is preferably ~.c, better 126510.doc -19-200912388 疋-120~200 C. The reason is that there is no glass transition temperature Tgi lower than -150° When the glass transition temperature Tgi of the first resin is 3 Torr or less, it can be easily heated to a processing temperature (temperature between Tg2 and Tgl) when the uneven pattern forming sheet 10 is produced. The Young's modulus of the second resin in the processing temperature at the time of forming the sheet is preferably from 0.01 to 100 MPa, more preferably from 7 to MPa. If the Young's modulus of the first resin is 0.01 MPa or more, Then, it has a hardness which can be used as the base material 11, and when the Young's modulus of the first resin is 1 〇〇 MPa or less, the softness of the hard layer 12 can be deformed at the same time as the first resin. For example, polyethylene phthalate such as polyethylene terephthalate; polyethylene 43⁄4 acrylonitrile polyene Polystyrene resin such as ethylene-butyl diene copolymer; | polyoxyl resin such as vinyl chloride, polyvinylidene chloride, polydidecyl fluorene oxide; fluororesin, ABS resin, polyamine, acrylic acid Resin, polycarbonate, polycycloolefin, etc. The glass transition temperature Tgz of the second resin is preferably 4 〇 to 4 〇〇. 〇, more preferably 8 〇 to 25 〇. In the case where the glass transition temperature Tg2 of the second resin is 40° C. or higher, the processing temperature at the time of producing the uneven pattern forming sheet 1 is useful at room temperature or above, and is economically disadvantageous. It is necessary to use a glass transition temperature Tgz of more than 40 (the resin of rc as the second resin). The Young's modulus of the second resin in the processing temperature at the time of producing the uneven pattern forming sheet 10 is preferably 0.01 to 300 GPa, more preferably 1 〇 GPa. The reason is that when the Young's modulus of the right second resin is 〇〇1 Gpa or more, it is possible to obtain a harder 126510.doc -20-200912388 degree than the #模模4 in the processing temperature of the first resin. This hardness can be used to maintain the sufficient hardness of the uneven pattern after the uneven pattern 12a is formed, and it is economically disadvantageous to use a resin having a Young's modulus of more than 300 GPa as the second resin. The above is the type of the first resin, and as the second resin, for example, polyvinyl alcohol, polystyrene, acrylic resin, styrene-acrylic copolymer, styrene-acrylonitrile copolymer, polyethylene terephthalate can be used. Ester, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, poly-f-ether sulfone, fluororesin, and the like. Among these, a fluorine resin is particularly preferable in terms of having an antifouling function. The thickness of the substrate 11 is preferably 〇3 to 500 μm. If the thickness of the substrate 〇 is 〇.3 μπι or more, the uneven pattern forming sheet 1 is difficult to be broken, and if the thickness of the substrate is 500 μηι or less. Further, the uneven pattern forming sheet (7) can be easily made thinner. Further, in order to support the substrate 11, a resin support having a thickness of 5 to 5 μm may be provided, and when the substrate is used as a light diffuser, the light diffusion property of the θ gate may be ' When the film containing the fine bubbles is attached to the substrate or the uneven pattern is formed into a light diffuser, in order to further improve the light diffusion effect, it is possible to prevent the optical characteristics such as light transmittance from being greatly impaired. The substrate 11 contains a light diffusing agent composed of an inorganic compound and an organic light diffusing agent composed of an organic compound. Examples of the inorganic light diffusing agent include magnesium dioxygenate, zinc oxide, oxidized chin, and rock (four) &amp; anti / month stone oxide glass, mica, etc. Oxidation of scorpionfish, gas oxidation, barium sulfate, glass 126510.doc • 21 - 200912388 As an organic light diffusing agent, exemplified by benzene, polymer particles, polymer particles, Shiyan Oxygen is a polymer particle, etc. These light diffusing agents can be used alone or in combination of two or more. s From the viewpoint of incomprehensible light transmittance, the content of the light diffusing agent Better 疋 relative to the first tree When the uneven pattern forming sheet 1G is used as a light diffusing body, in order to further improve the diffusion effect, it is possible to prevent the optical characteristics such as light transmittance from being greatly impaired. The fine particles are contained in the substrate u. The fine bubbles absorb less light and are less likely to lower the light transmittance. As a method of forming the fine bubbles, a method of mixing a blowing agent into the base (4) can be applied (for example, 'Japanese Patent Special Opening A method of foaming an acrylic foamed resin to contain fine bubbles (for example, Japanese Patent Laid-Open Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. Further, in order to achieve more uniform surface irradiation, the method of forming fine bubbles is preferably a method of foaming a specific position unevenly (for example, the patent of the present invention) Further, the light diffusing agent and the fine foaming may be used in combination. The thickness of the hard layer 12 is preferably more than 〇.〇5 μιη and is 5 (4) or less, more preferably Μ~2 μΐΠ. When the thickness of the hard layer exceeds G.G5 μΐη and is 5 μm or less, the uneven pattern forming sheet can be easily produced as follows. Further, in order to improve adhesion and form finer The structure may also be such that an undercoat layer is formed between the substrate 11 and the hard layer 12. The concave-convex pattern 最 the pitch ratio Α of the concave-convex pattern 12a of the sheet 10 exceeds 1 μηη I26510.doc -22- 200912388 and is 20 μηα or less Preferably, it is more than ! μιη and is below i〇. If the most frequent spacing Α is less than 1, the light will pass through, and if the most frequent spacing a exceeds pm ', the light diffusibility will be low. The bottom of the concave pattern 2a is 12b The average depth Β is set to the minimum frequency spacing ( (10) on the hidden X (ie, the vertical and horizontal UxJi), preferably above the gauge (that is, the aspect ratio is 0.3 or more). ^When the average depth of the material A is set to 100% at 100%, even if the concave-convex pattern forming sheet is used as the original film for the production of the light diffuser, it is difficult to obtain light diffusion with high dispersibility. body. °, also from the angle at which the concavo-convex pattern 12a can be easily formed

The words 'average depth B is better than the most frequent ratio of 3.0 or less), and more. 3距% or less when the distance A is set to 100% (that is, the length is 2〇〇°/° or less (that is, the aspect ratio is 2.0 here) the bottom portion 12b refers to the minimum of the concave portion of the concave-convex pattern 12a. When the cross-sectional shape (see FIG. 2) obtained by cutting the concave-convex pattern forming sheet 1〇 in the longitudinal direction is observed, the reference line L1 to each convex parallel to the surface direction of the entire uneven pattern forming sheet (7) is used. The average value (Bav) of the length I from the top of the portion, and the length from the reference line L丨 to the bottom of each concave portion, the top of the convex portion and the bottom portion of the concave portion are opposite to the substrate 11 side of the hard layer 12 The side surface is adjacent to each other. The following method can be used: each value in the image of the cross section of the pattern is measured. As a method of measuring the average depth B, the depth of the bottom of the concave and convex portions taken by the atomic force microscope is determined. The average of 126510.doc -23- 200912388 In order to obtain a light diffuser having a high anisotropy of light diffusion, it is preferable that the concave-convex pattern 12a is meandered to some extent, and the adjacent convex portions are spaced apart from each other along the concave-convex pattern 12a. Not uniform. Here, The unevenness of the alignment of the concavo-convex pattern 12a is called the alignment degree. The larger the alignment degree, the more uneven the alignment. The alignment degree is obtained by the following method. First, the surface of the concave-convex pattern is photographed by a surface optical microscope, and Converting the image into a grayscale document (for example, tiff format, etc.) in the image of the grayscale document (refer to FIG. 3), the lower the whiteness, the deeper the bottom of the concave portion (the higher the whiteness) Wherever, the top of the convex portion is higher.) Then, the image of the grayscale document is Fourier transformed. The image after Fourier transform is shown in Fig. 4. The white color extending from the center of the image of Fig. 4 to both sides The portion includes information on the distance between the concave and convex patterns 12a and the orientation. Next, the auxiliary line L2 is drawn in the horizontal direction from the center of the image of Fig. 4, and the brightness on the auxiliary line is drawn (refer to Fig. 5). The horizontal axis represents the reciprocal of the pitch, the vertical axis represents the frequency, and the frequency is the maximum value. The reciprocal 1/X of the X indicates the most frequent spacing of the concave-convex pattern 12a. Then, in Figure 4, the auxiliary is called, and the value is χ Part and auxiliary line

degree. The half value width W! is larger. The half value width % of the peak in Fig. 6 (the frequency is the width of the peak at the half of the height) indicates that the alignment of the concave-convex pattern W] is larger, which means that the meandering is made uneven. 126510.doc •24· 200912388 The above-mentioned better alignment is 〇·3~1〇. When the alignment degree is 〇.3 to 丨〇, the unevenness between the concave-convex patterns 12a is large, and the concave-convex pattern-forming sheet and the light-diffusing body light obtained by using the concave-convex pattern-forming sheet as the original sheet of the engineering sheet are used. More diffusive. If the degree of alignment exceeds 1 〇, the direction of the bevel pattern becomes random to some extent, so the light diffusibility becomes high, but the directionality is low. / In order to make the degree of alignment 0.3 to 1.o, it is possible to appropriately select the target of the compressive stress necessary for the production of the sheet by the uneven pattern. The difference (Tg2_Tgi) between the glass transition temperature of the second resin constituting the hard layer 12 and the glass transition temperature Tgi of the first resin constituting the substrate 11 is i〇. The above-described concave-convex pattern forming sheet 1 of the present invention can be obtained by the following method for producing a concave-convex pattern forming sheet, and thus can be easily produced. Moreover, as a result of the investigation by the inventors, it was found that when both the base #11 and the hard (four) are transparent, the most frequent pitch A of the concave-convex pattern 12a exceeds i_ and is less than 2〇ηη below the 'concave&amp; bottom of the pattern 12a (3) The average depth β is 10% or more when the above-mentioned worst-frequency pitch A is a surface, that is, the concave-convex pattern forming sheet 10 of the present invention has sufficient light diffusibility, and thus can be used as a light diffuser. △ Further, the uneven pattern forming sheet of the present invention is not limited to the above embodiment. For example, the top end of the convex portion of the concave-convex pattern of the concave-convex pattern forming sheet of the present invention may also be a pointed top. However, the diffusion anisotropy is further improved. The convex portion of the convex pattern preferably has a curvature at the top end. shape. (Concave-convex pattern forming sheet-2) 4 I I have found that the distance A of the concave-convex pattern 12a is 1 μm or less, especially for shouting, and the concave-convex pattern 126510.doc -25- 200912388 12a The average depth B of the bottom portion 12b is 10% or more in the case where the most frequent pitch A is ι〇〇%, and is particularly preferably 1% or more, whereby excellent performance as an optical element can be exhibited. Specifically, when the uneven pattern is formed into a sheet as an antireflection body, 1 reduces the reflectance 'and' when the concave-convex pattern forming sheet 1 is used as a phase difference plate, the same can be achieved over a wide wavelength region. Phase difference. The reason for this is that 'the average frequency P of the concave-convex pattern 12a is short, and when i is hereinafter, the average depth B is smaller than 罙, which is 10% or more when the most frequent pitch A is 100%. That is, the 'frequency band spacing A is short, the wavelength of the visible light is the same, or the wavelength of the visible light is below, and it is difficult for the visible light to be diffracted or scattered by the unevenness. Further, since the average depth_depth and the portion in which the intermediate refractive index changes continuously become longer in the thickness direction, the effect of suppressing light reflection can be remarkably exhibited. Further, since the most frequent pitch A is short and the average depth B is deep, the portion in which the air having different refractive indices and the concave-convex pattern forming sheet are alternately arranged becomes longer in the thickness direction, and the portion exhibiting optical anisotropy becomes longer. Therefore, a phase difference can be generated. Further, the phase difference generated by the uneven pattern is substantially the same over a wide wavelength region. At this time, the hard layer 12 has a lower refractive index with respect to the substrate, but a higher antireflection property can be obtained, which is preferable. Further, the thickness of the hard layer 12 is preferably nm. When the thickness of the hard layer 12 is 1 nm or more, the hard layer 12 is less likely to cause defects, and when the thickness of the hard layer 12 is 1 〇〇 nm or less, the hard layer 12 can sufficiently ensure light transmittance. Further, the thickness of the hard layer 12 is more preferably 5 〇 nm or less, and particularly preferably 20 nm or less. If the thickness of the hard layer 12 is 5 〇 nm or less, the embossed pattern forming sheet can be easily manufactured as described below. 126510.doc -26- 200912388. Further, in order to improve the adhesion and form a finer structure, it is also possible to form an undercoat layer between the substrate 11 and the hard layer 12. Further, a resin layer may be provided on the hard layer 12. The most frequent pitch of the concave-convex pattern 12a of the concave-convex pattern forming sheet 10 is 8% or less, preferably 0_4 or less. Further, from the viewpoint that the uneven pattern i2a can be easily formed, the most frequent pitch 8 is preferably 0 05 μm or more. Preferably, the pitch of the concavo-convex pattern 12a is eight 丨, A. , . . . are within the range of ±6〇〇/0 of the most frequent spacing A, and more preferably within the range of ±3〇%. If the pitch is within ±60% of the most frequent pitch, the pitch is uniform and the performance as an optical component can be improved. Further, after the median pitch A is satisfied to be i μηι or less, each of the pitches A, A2, and Ay·· may be continuously changed. Preferably, each of the depths Bi, B2, and b3 of the concavo-convex pattern 12a is within ±60〇/〇 of the average ice B, and more preferably within ±3〇%. If each depth is within ±6〇% of the average depth of 3, the depth is uniform and the performance as an optical element can be exhibited. Further, when the average depth B is equal to or greater than 〇/〇 when the most frequent pitch a is 1%, the depth ratios, El, and Br can be continuously changed. The concave-convex pattern forming sheet 1G can be applied to an optical element such as an antireflection body or a phase difference plate, and an optical element for producing an optical element, as described below, and can also be used for an ultra-water-repellent sheet or a super-hydrophilic sheet. Further, the uneven pattern forming sheet is not limited to the above embodiment. For example, in the above embodiment, the hard layer has a periodic corrugated concavo-convex pattern in the width direction of the 126510.doc 200912388 sheet along the concave-convex pattern, but may have a sheet along the concavo-convex pattern in addition to the concavo-convex pattern. A periodic wave-shaped concave-convex pattern in the longitudinal direction. Further, the hard layer may have a large number of undulating concave and convex patterns along a specific direction. In such a case, the most frequent pitch of the concave-convex pattern is 1 μm or less, and the average depth of the bottom of the concave-convex pattern is 1% or more when the above-mentioned worst-frequency pitch is 100%, thereby exhibiting as an optical element. Excellent performance. From the viewpoint of the refractive index, the shape of the convex portion is preferably that the tip is a apex, but the tip may also have a curvature. When the concave-convex pattern is not in a specific direction, the maximum frequency spacing can be obtained in the following manner. First, the surface above the concave-convex pattern is photographed by an atomic force microscope, and the image is converted into a grayscale document (for example, a tiff format or the like). In the image of the gray text (refer to Fig. 24), the lower the whiteness, the deeper the bottom of the concave portion (the higher the whiteness, the higher the top of the convex portion). Then, Fourier transform is performed on the image of the grayscale document. The image after Fourier transform is shown in FIG. In the Fourier-transformed image, the direction observed from the center of the white portion indicates the directionality of the gradation, and the reciprocal of the distance from the center to the white portion indicates the period of the gradation image. When the concave-convex pattern is not in the characteristic direction, it becomes an image in which a ring is displayed as shown in Fig. 26. Eight people's circle center in the image after Fourier transform is directed to the outer linear auxiliary line L2, and the brightness (Y axis) on the distance from the center (X axis) is drawn (refer to Figure 24). ). Then, the value r of the X-axis indicating the maximum value in the drawing is read. The reciprocal (i/r) of the 1&gt; value is the most frequent spacing. (Concave-convex pattern forming sheet-3) 126510.doc -28- 200912388 When the hard layer 12 is composed of a metal or a metal compound, it is easy to form the concave-convex pattern forming sheet 1〇, and therefore the metal is preferable. As the metal, the Young's modulus is not too high, and the concave-convex pattern 12a can be formed more easily, so it is preferably selected from the group consisting of gold, aluminum, silver, carbon, copper, bismuth, indium, lock, bismuth, palladium, lead, and platinum. At least one metal selected from the group consisting of bismuth, tin, titanium, vanadium, zinc, and antimony. The metal mentioned here also contains abundance. As a metal compound, for the same reason, it is preferably selected from the group consisting of titanium oxide, aluminum oxide, zinc oxide, magnesium oxide, tin oxide, copper oxide, indium oxide, cadmium oxide, lead oxide, antimony oxide, and antimony fluoride. And at least one metal compound of the group consisting of potassium fluoride, cesium fluoride, zinc sulfide, and gallium arsenide. Further, when the hard layer 12 is made of a metal, the surface of the layer may be oxidized by air to form an air oxide film. However, in the present invention, the layer of such a metal layer which is oxidized by air is also regarded as composed of metal. Layer. The thickness of the hard layer 12 is preferably more than 〇.〇1 and is 0.2 or less, more preferably 0.02 to 0·1 μη. When the thickness of the hard layer exceeds 〇〇1 and is 0.2 μm or less, the uneven pattern forming sheet can be easily produced as follows. Further, an undercoat layer may be formed between the substrate 11 and the hard layer 12 in order to improve the rituality and form a finer structure. The most frequent pitch A of the concavo-convex pattern 12a of the concavo-convex pattern forming sheet 10 is more than 1 μm and is 20 μm or less, preferably more than 1 μm and not more than 1 μmη. When the most frequent pitch Α is less than 1 μm and exceeds 20 gua, even if the concave-convex pattern forming sheet 10 is used as an original for manufacturing a light diffuser, it is difficult to obtain light 126510.doc • 29- 200912388 Light diffusion with high diffusivity body. 2. Method of Producing Concavo-Contour Pattern Forming Sheet Hereinafter, an embodiment of a method for producing a concavo-convex pattern forming sheet of the present invention will be described. As shown in Fig. 7, the method for producing a concave-convex pattern forming sheet according to the present embodiment includes the following steps: "Setting a hard surface 13 having a smooth surface on one surface of the heat shrinkable film Ua as a resin substrate (hereinafter referred to as The surface is smoothed to the hard layer 13) to form the laminated sheet 10a (hereinafter referred to as the first step); and the heat shrinkable film i丨a is heated and shrunk, and at least the surface of the laminated sheet i is smoothed to the hard layer 13 to be folded. The method is modified (hereinafter referred to as the second step). Here, the surface smoothing hard layer 13 is a layer having a center line average roughness of 〇·1 μπι or less as described in JIS B0601. In the first step, in the first step, the surface of the heat-shrinkable film 11 a is provided with a surface smoothing hard layer 13 made of a resin to form the laminated sheet 10a, and for example, a heat shrinkable film Ua is exemplified. On one of the surfaces, a solution or a dispersion of the second resin is applied by a spin coater or a bar coater, and the solution is dried; the layer is preliminarily laminated on one side of the heat shrinkable film 11 a. The method of making the surface smoothing the hard layer 13 and the like. As the heat-shrinkable film 丨丨a, for example, a polyethylene terephthalate-based shrink film, a polystyrene-based shrink film, a polyolefin-based shrink film, a polyvinyl chloride-based shrink film, or the like can be used. Among the shrink thinner, it is especially good to shrink the shrinkage of 5〇~7〇% 126510.doc •30- 200912388 Membrane. When a shrink film having a shrinkage of 50 to 70% is used, the deformation ratio can be made 5% or more, and the optimum pitch A of the uneven pattern 12a can be easily produced. The average depth β of the bottom of the concave-convex pattern i2a is not less than 20 μm, and the unevenness pattern forming sheet 1 of 1% or more when the most frequent pitch Α is 1%.

Further, the average depth B of the bottom portion l2b of the uneven pattern Ua can be easily produced. The uneven pattern forming sheet 10 of ι〇〇〇/〇 or more when the most frequent pitch A is set to loo%, where the deformation ratio means Length before deformation - length after deformation) / (length before deformation) xl00 (. /.), or means (length after deformation) / (length before deformation) xl00 (%;). Further, the average depth 凹凸 of the concave-convex pattern l2a can be set to 3 〇 〇 % when the maximum frequency spacing A is set to 1 〇 〇 %. On the heat-shrinkable film 11a, the undercoat resin layer having a glass transition temperature lower than that of the heat-shrinkable film 11a is applied, and a layered sheet provided with the surface hard smooth layer 13 is formed on the undercoat resin layer. The laminated sheet is heated and contracted, whereby a concave-convex pattern forming sheet is formed. The heat shrinkable film 11a after heat shrinkage is peeled off from the laminated sheet, and another heat shrinkable film is bonded to form a laminated sheet. The laminated sheet is heat-shrinked, whereby the average depth B can be made larger than the case where one sheet of the heat-shrinkable film is heated and shrunk. After repeating this step a plurality of times, the average depth B of the uneven pattern 12a can be 3 〇〇〇/〇 when the most frequent pitch a is set to 1 〇〇%. In the present invention, it is preferable that the thickness of the surface smooth hard layer 13 exceeds 0.05 μm and is 5.0 μη or less. The thickness of the surface smooth hard layer 13 is set to the above range, whereby the inter-frequency 126510.doc -31 - 200912388 of the concave-convex pattern 12a can reliably exceed 1 μm and be 20 μm or less. However, if the thickness of the surface smooth hard layer 13 is 〇〇5 μm or less, the most frequent spacing Α may be 1 or less. If the thickness of the surface smooth hard layer η exceeds 5.0 μm, the maximum frequency spacing a may sometimes exceed 2〇μηη. Further, in the present invention, the surface smoothing hard layer 13 is composed of a resin (the second resin) having a glass transition temperature higher than that of the resin (the second resin) constituting the heat shrinkable film. Since the glass transition temperature of the second resin and the glass transition temperature of the second resin satisfy the above relationship, the most frequent pitch A of the uneven pattern 12a can be reliably more than 1 and 20 μm or less. The thickness of the surface flat α hard layer 13 can also be When the thickness of the surface smooth hard layer 13 is continuously changed, the distance and depth between the concavo-convex patterns 12a formed after compression are continuously changed. In the manufacturing method, 'from the viewpoint that the concavo-convex pattern can be more easily formed 5' is preferable to set the Young's modulus of the surface smooth hard layer 13 to 〇·〇1 to 300 GPa. More preferably, it is set to 0.1 to 10 GPa. When the laminated sheet 10a is deformed, Preferably, the surface smoothing hard layer j 3 is deformed by a deformation ratio of 5 / or more. If the surface smoothing hard layer 13 is deformed by the above deformation ratio, the average depth B of the bottom portion 12b of the concave-convex pattern 12a can be easily made. For the most frequent a is set to 〇〇% or more 丨〇% or more. Further, it is more preferable to deform the surface smooth hard layer 13 by a deformation ratio of 5% or more. If the surface is smooth, the hard layer 丨3 is 5% or more. When the deformation rate is deformed, the average depth B of the bottom portion 12b of the uneven pattern 12a can be easily set to 1% or more when the most frequent pitch A is set to 0%%. • Step 1-2 126510.doc -32- 200912388 Further, when the hard layer 12 is composed of a metal bite s μ 1 Λ 金属 $ metal compound, the method of reporting the laminated sheet 10a can be listed as a 7-horse shape, for example, in the case of heat shrinkable thin abdomen n - Surface vapor deposition of gold 35 or gold film Ua film Ua on one side, laminated layer, heat shrinkage thin method, etc. The surface smoothing hard layer 13 is particularly developed in this manufacturing method, More Wengu easily forms the corner sound of the concave-convex pattern 12a and $, it is better to make the surface smooth and hard 〇1 cnn rp _ The Young's module of the mouth 3 is set to 0.1~5〇GGPa, and more preferably set to 1 ~l50GPa. In order to smooth the surface of the hard shore η month hard buy wide 13% of the modulus is set to be good to smooth the surface, Ρ The solid layer 13 consists of gold, aluminum, silver, carbon, copper, bismuth, indium, magnesium, sharp, kiln, lanthanum, platinum, lanthanum, tin, titanium, vanadium, zinc, and antimony. At least one of the group consists of a metal. Or, preferably, the surface smoothes the hard layer 13 by being selected from the group consisting of oxidized osmium, oxidized zinc, zinc oxide: magnesium oxide, tin oxide, copper oxide, indium oxide, and cadmium oxide. , oxidized ytterbium oxide ytterbium fluoride, fluorinated mother, magnesium fluoride, sulphide, gallium arsenide consists of at least one kind of metal compound. Here, Young's modulus is root (four) s z 228 ( )_1993 "Southern Temperature Young's Modulus Test Method for Metallic Materials"' The value measured by changing the temperature to 23〇c. The same is true when the hard layer is composed of a metal compound. The thickness of the surface flat α hard layer 13 exceeds Gqi (4) and is q 2 (four) or less, preferably 0.02 to 0.1 _. When the thickness of the surface smooth hard layer 13 is set to the above range, the most frequent pitch A of the uneven pattern Ua can be reliably exceeded by i μη and is 2 G μη or less, whereas the surface is smooth. If the thickness is less than 〇'〇1 μηι, then the most frequent spacing Α will sometimes become the following. If the surface is flat 126510.doc -33- 200912388 π hard shell layer 13 has a thickness exceeding 〇·2 μιη, then the most frequent spacing a has It will exceed 20 μm. Further, the thickness of the surface smooth hard layer 13 may be continuously changed. When the thickness of the surface smooth hard layer 13 is continuously changed, the distance and depth between the concavo-convex patterns 12a formed after compression are continuously changed. When the laminated sheet 10a is deformed, it is preferred that the surface smoothing hard layer 13 is deformed at a deformation ratio of 5 / or more. When the surface smoothing hard layer 13 is deformed by a deformation ratio of 5% or more, the average depth B of the bottom portion of the uneven pattern na can be easily made 10% or more when the maximum frequency spacing a is 100%. Further, it is preferable that the surface smooth hard layer 13 is deformed at a deformation ratio of 5% or more. When the surface smoothing hard layer 13 is deformed by a deformation ratio of 5% or more, the average depth b of the bottom portion 12b of the concave-convex pattern 12a can be easily made 1%% when the maximum frequency spacing A is set to 1%%. the above. • In the second step, in the second step, the heat shrinkable film 11 a is heat-shrinked, thereby forming a wavy concave-convex pattern 12a on the surface of the hard layer 13 in a direction perpendicular to the contraction direction. The hard layer 12 is thus obtained. The method of heating the heat-shrinkable film 11 &amp; when it is heated and contracted is, for example, a method of passing through hot air, steam or hot water, and the like, which is particularly preferable from the viewpoint of uniformly shrinking the heat-shrinkable film 11a. It is the method of passing in hot water. The heating temperature at the time of heat shrinkage of the heat shrinkable film 11a is preferably selected depending on the type of the heat shrinkable film to be used and the distance between the target uneven pattern 12a and the depth of the bottom portion 12b. 126510.doc • 34- 200912388 In the manufacturing method, if the thickness of the surface smooth hard layer 13 is thinner and the Young's modulus of the surface smooth hard layer 13 is lower, the pitch A of the concave-convex pattern 12a is smaller. The higher the deformation rate of the substrate, the deeper the average depth b. Therefore, in order to set the concave-convex pattern 12a to the specific frequency spacing a and the average depth B, it is necessary to appropriately select the above conditions. In the method for producing a concave-convex pattern forming sheet described above, the glass transition temperature is higher than the first resin constituting the surface smooth hard layer 13 than the first resin constituting the heat-shrinkable thin film Ua. As described above, when the temperature between the glass transition temperature of the first resin and the glass transition temperature of the second resin is higher, the Young's modulus of the surface smoothing hard layer 13 is higher than that of the heat shrinkable film 11a. Further, since the thickness of the surface smoothing hard layer 13 is set to be more than 0.05 μm and not more than 5.0 μΐη, the surface is smooth and hard at the temperature between the glass transition temperature of the j-th resin and the glass transition temperature of the second resin. 13 said that the thickness is increased, it is better to say that it is folded. Further, since the surface smooth hard layer 13 is laminated on the heat shrinkable film Ua, the stress generated by the shrinkage of the heat shrinkable film 11a is uniform as a whole. Therefore, according to the present invention, the surface smoothing hard layer 13 is deformed in a folded manner, and the uneven pattern forming sheet 10 excellent in the performance of the light diffusing body can be easily and widely produced. Further, according to the manufacturing method, the most frequent pitch of the concave-convex pattern 12a can be easily made to exceed i _ and be less than 2 μm, and the average depth B of the bottom of the concave-convex pattern core can be easily made to be the maximum frequency spacing A. Set to 1〇% or more at 1〇〇%. Further, as a method of producing the uneven pattern forming sheet, the following method 1265l.doc.35-200912388 (1) to (4) may be applied: Method (1) A smooth hard layer is provided on the entire surface of the substrate 11. 13 to form the laminated sheet 10a' and compress the entire laminated sheet i〇a in one direction along the surface. When the glass transition temperature of the substrate 11 is lower than room temperature, the compression of the laminated sheet 1a is performed at room temperature, and when the glass transition temperature of the substrate is above room temperature, the compression of the laminated sheet 10a is It is carried out at a temperature above the glass transition temperature of the substrate crucible and below the glass transition temperature of the surface smooth hard layer 13. Method (2) On the entire surface of the substrate 11, a smooth hard layer 13 is provided to form the laminated sheet 10a, so that the laminated sheet i〇a extends in one direction and shrinks in the direction orthogonal to the extending direction. The surface smooth hard layer 13 is compressed in one of the directions. When the glass transition temperature of the substrate 11 is lower than room temperature, the extension of the laminated sheet 10a is performed at room temperature, and when the glass transition temperature of the substrate ii is above room temperature, the extension of the laminated sheet 10a is based on The temperature of the material 11 is higher than the glass transition temperature and lower than the glass transition temperature of the surface smooth hard layer 13. (3) On the substrate ji formed of the uncured ionizing radiation-curable resin, the surface of the hardened layer 13 is laminated to form a laminated sheet 1 〇a, and the ionizing radiation is irradiated to harden the substrate 11, thereby making the substrate 11 hardened. It shrinks and compresses the surface smooth hard layer 13 laminated on the substrate 11 in at least one direction along the surface. 126510.doc -36- 200912388 Method (4) The substrate which is swollen and expanded by the solvent is coated with a smooth surface of the hard surface layer 13 to form a laminated sheet 1 〇a, and the solvent in the substrate 11 is dried, It is removed, thereby causing it to shrink, and compresses at least along the surface - without smoothing the hard layer i 3 which is laminated on the substrate 11. In the method (1), as a method of forming the laminated sheet 1a, an example may be mentioned; the φ on the soil material 11 is coated with a resin solution by a spin coater or a bar coater, and A method of drying a solvent; a method of stacking a pre-made surface smooth and hard (4) on a substrate surface. As a method of dusting the entire laminated core in the direction along the surface, for example, a method of compressing the end portion of one end of the laminated core and the opposite side thereof by a vise or the like is performed. In the method (2), the method of extending the laminated sheet (10) in the − direction may, for example, be a method of stretching the end portion of the laminated sheet 1Ga and the end portion on the opposite side to extend the same. In the method (3), examples of the ionizing radiation curable resin include an ultraviolet curable resin or an electron beam curable resin. In the method (4), the solvent can be appropriately selected depending on the kind of the second resin. The drying temperature of the solvent can be appropriately selected depending on the kind of the solvent. For the surface smooth hard layer 13 in the methods (2) to (4), the same components as in the method (1) can be used, and the same thickness can be used. χ, laminated sheet-formation method and method (1) The same method can be applied: coating a resin solution or dispersion on the surface of the substrate 11 and drying the solvent 126510.doc -37· 200912388 method A method of laminating a previously prepared surface smooth hard layer on one side of the substrate 11. • 2nd step-2 * When the mode spacing a of the concavo-convex pattern 12a is 1 or less, in the method (1), the thickness of the surface smoothing hard layer 13 is preferably 5 〇 nm or less, more preferably 20 Below nm. When the thickness of the surface smooth hard layer 13 is 5 〇 nm &amp; amp, the maximum pitch A of the concave-convex pattern 12a can be reliably made i μηι or less. Further, the surface smooth hard layer 13 is preferably 1 nm or more from the viewpoint that the hard layer 12 after compression is less likely to cause defects. In this case, the surface smoothing hard layer 13 is made 10 higher by the glass transition temperature than the first resin. (The above-mentioned second resin is used. When the surface smoothing hard layer 13 is composed of a second resin having a glass transition temperature higher than the first resin by 1 〇 ° C or more, the substrate can be made to be compressed at the time of compression. In the state in which the surface smoothing hard layer 13 is wavy and deformed by meandering, the uneven pattern 12a can be easily formed. In the manufacturing method of the uneven pattern forming sheet described above, the smooth hard layer 13 is formed by the surface. When the second resin phase has a glass transition temperature higher than 10 ° C or higher than the first resin constituting the substrate 11 , when the temperature between the glass transition temperature of the first resin and the glass transition temperature of the second resin is between The Young's modulus of the surface smooth hard layer 13 is higher than that of the substrate 11. Therefore, when the temperature between the glass transition temperature of the first resin and the glass transition temperature of the second resin is processed, the surface smoothing the hard layer 13 is not so much. The thickness is increased as it is folded. Further, since the surface smooth hard layer 13 is laminated on the substrate 11, the stress generated by compression or contraction is uniform as a whole. Therefore, according to the present invention In addition, the uneven pattern forming sheet 10 can be easily produced by deforming the surface smooth hard layer 蛇3, and the uneven pattern forming sheet 10 having excellent performance can be easily produced in a large area as an optical element. Further, according to the manufacturing method, the concave-convex pattern forming sheet 10 can be easily shortened. Since the most frequent pitch A of the concave-convex pattern 12a is, the average depth B can be made deeper. Specifically, the most frequent pitch A of the concave-convex pattern 12a can be easily made 1 or less, and the average depth of the bottom portion 12b of the concave-convex pattern 12a can be easily made. β is 10% or more when the most frequent pitch a is t 〇〇%. Further, according to the manufacturing method, the pitches A!, A2, A3, ... and the respective depths B1 and b2 in the uneven pattern 12a can be easily made. In the second step, when a metal or a metal compound is used as the surface smooth hard layer, the heat shrinkable film m is thermally contracted in the second step, whereby the surface is smoothed on the hard layer 13. The corrugated concave-convex pattern 12a is formed in a direction perpendicular to the contraction direction to form the hard layer 12. The heating method for heating and contracting the heat-shrinkable film 11a is exemplified by hot air, A method of passing gas or hot water, etc., from the viewpoint of uniformly shrinking the heat shrinkable film 11a [particularly, a method of passing through hot water. The heat shrinkable film 1 la埶 shrinks... The heating temperature of the smear is preferably selected according to the type of the heat shrinkable film to be used and the distance between the target concave-convex pattern 12a and the depth of the bottom portion 12b. In the manufacturing method, if the surface is smooth, The thinner the thickness of the hard layer 13 is, the lower the Young's modulus of the smooth hard layer 13 is, the smaller the pitch A of the concave-convex pattern (1) is, and the higher the deformation rate of the substrate is. The average depth B of the material is more fruitful. Therefore, in order to set the concave-convex pattern 12a to the specific minimum spacing 8 and the average depth B', the above conditions must be appropriately selected. In the method for producing a concave-convex pattern forming sheet described above, the Young's modulus of the surface smooth hard layer 13 composed of a metal or a metal compound is much larger than the Young's modulus of the heat shrinkable film Ha, and therefore When the surface of the heat-shrinkable film 11a is harder and the hard layer 13 is thermally compressed, the surface smoothing hard layer 13 is not so thick as it is folded. Further, since the surface smooth hard layer 13 is laminated on the heat shrinkable film Ua, the stress generated by the shrinkage of the heat shrinkable film 11a is uniform as a whole. Therefore, according to the present invention, the surface smoothing hard layer 13 is deformed in a folded manner, and the uneven pattern forming sheet excellent in performance can be easily produced in a large area as a light diffusing body. Further, according to this manufacturing method, the most frequent pitch A of the uneven pattern 12a can be easily made larger than 1 μm and equal to or less than 2 μm, and the average depth 底部 of the bottom portion l2b of the concave-convex pattern 12a can be easily set to the most frequent pitch a. 1〇〇〇/. More than 10% of the time. However, as a method of producing a sheet for forming a concave-convex pattern, it is known that a hot nano-imprint method is performed by pressing a concave-convex pattern of a mold for nanoimprinting onto a sheet-shaped thermoplastic resin which is softened by heating. In the light nano-imprint method, the uncured ionizing radiation curable resin composition is coated on the concave-convex pattern of the mold for imprinting, and then irradiated with ionizing radiation to be hardened. 126510.doc 200912388 In the thermal embossing method, it is necessary to apply uniform pressure to the entire mold to press the mold having the concave-convex pattern on the thermoplastic resin, but in the method, if the area of the mold is large, the application is performed. The pressure on the mold tends to be uneven, and as a result, the transfer of the concave-convex pattern becomes uneven. Therefore, it cannot be said that it is suitable for the production of a large-area concave-convex pattern forming sheet used for a liquid crystal t-displayed tissue. ^ In the photonic N I method, since the mold release property of the mold and the hardened resin is insufficient, the transfer of the uneven pattern may become incomplete. Moreover, the more the number of times the mold is repeatedly used, the more significant the tendency. With respect to these nanoimprint methods, the above-described method for producing a concavo-convex pattern forming sheet can omit the transfer of the concavities and convexities (4), thereby eliminating the above-mentioned problems in the nanoimprint method.

Further, in the above-described embodiment, the hard layer may be provided with a hard layer on one of the base materials on both sides of the substrate. 3. The light diffuser ' is provided on one side of the substrate on a part of the surface, and the hard layer is provided, or the layer of light or the two sides of the substrate, the light diffuser having the most frequent spacing A exceeds i and is 2〇_ The following concavo-convex pattern forming sheet 1〇. In the light diffuser of the present invention, J J has other layers on one or both sides of the uneven pattern forming sheet 10. For example, y, the surface of the concave-convex pattern forming sheet 10 on which one side of the uneven pattern 12a is formed may be prevented from contaminating the surface, and may have a thickness of 1 to ί nm containing a fluororesin or a polyoxyl resin. Anti-fouling layer on the left and right. 126510.doc •41· 200912388 Further, on the surface of the substrate 11 side of the light diffuser, a support made of a transparent resin or a glass may be supplied as a *α a 々j. Further, an adhesive layer may be formed on the surface of the substrate 11 side, or may contain a coloring matter so as to have appropriate functionality. The light diffusing body of the present invention having the above-described uneven pattern forming sheet having a concave-convex pattern formed on its surface has sufficient light diffusibility. 4. The method for producing a light-diffusing body original sheet and a method for producing a light-diffusing body The original sheet for producing a light-diffusing body of the present invention (hereinafter referred to as an original sheet) is provided with the above-described uneven pattern forming sheet 10 The embossed pattern forming sheet can be used as a mold having a large area and a large number of embossed pattern forming sheets by transferring the embossed pattern 12a to other materials in a manner as described below, and the embossed pattern forming sheet can be formed on the surface and having the original sheet of the engineering sheet A light diffuser having the same pattern of the most frequent pitch and the average depth. Further, on the original sheet of the engineering sheet, a resin or metal support for supporting the uneven pattern forming sheet 10 may be further provided. As a specific method for producing a light-diffusing body using an original sheet of the engineering sheet, for example, the following methods (a) to (C): Method (a) The method includes the steps of: forming a concave-convex pattern on the original sheet of the engineering sheet The coating of the uncured ionizing radiation-curable resin and the irradiation of the ionizing radiation to cure the curable resin are performed, and then the cured coating film is peeled off from the original sheet of the engineering sheet. Here, the ionizing radiation generally means ultraviolet rays or electron rays, and the present invention also includes visible rays, xenon rays, ion rays, and the like. 126510.doc •42· 200912388 Method (b) The method comprises the steps of: coating an unhardened liquid thermosetting resin on a surface of the original sheet on which the concave-convex pattern is formed; and heating to make the liquid heat The curable resin is hardened, and then the hardened coating film is peeled off from the original sheet of the engineering sheet. Method (c) The method comprises the steps of: contacting a sheet-shaped thermoplastic resin to a surface of the original sheet of the engineering sheet on which the concave-convex pattern is formed; pressing the sheet-shaped thermoplastic resin on the original sheet of the engineering sheet, and in this state Heating is performed to soften it and then cooled; and the cooled sheet-like thermoplastic resin is peeled off from the self-defense sheet original. Further, it is also possible to produce a molded article for secondary engineering using the original film of the virgin sheet, and to manufacture the light diffuser using the molded article for secondary engineering. For example, a secondary engineering sheet can be exemplified as a secondary engineering sheet. The following is an electric series: the original sheet of the engineering sheet is rounded and attached to the cylinder (4) and The plated roller was obtained by electroplating in a state of being inserted into the inside of the cylinder and taking out the roller from the cylinder. As a specific method of using the secondary engineering molding method (4) to (f): &amp;&gt;, the following method (d) includes the following steps: on the surface of the original sheet of the engineering sheet, which is formed on the surface of the filial piety A metal such as nickel or the like, and a material for transfer is formed by a laminated plating layer (the plating layer is peeled off from the original worksheet of the concave-convex pattern) to prepare a molded product for the king and then formed for secondary engineering. 126510.doc -43 - 200912388 A line-curable resin on one side in contact with the concave-convex pattern; and after hardening by irradiation, coating the uncured ionizing radiation ionization from the secondary engineering method (e) The hardened coating film is peeled off by the radiation, and the method includes the steps of: laminating a plating layer (concave-convex pattern transfer material) on the surface of the original sheet on which the concave-convex pattern is formed; The electroplated layer is peeled off from the original sheet to prepare a metal-made secondary engineering molded article; and the unhardened liquid hot hard is applied to the surface of the secondary engineering molded article in contact with the concave-convex pattern. The resin is cured; and the resin is cured by heating, and then the cured coating film is peeled off from the secondary engineering molded article. Method (f) The method includes the steps of: forming a concave-convex pattern on the original sheet of the engineering sheet a laminated plating layer (concave-convex pattern transfer material); the plating layer is peeled off from the original sheet of the engineering sheet to prepare a metal-made secondary engineering molded product; and the sheet-shaped thermoplastic resin is brought into contact with the secondary engineering forming a surface of the object in contact with the concave-convex pattern; the sheet-shaped thermoplastic resin is pressed against the secondary engineering molded article, and heated in this state to be softened, and then cooled; and The molded article for secondary engineering is peeled off from the above-mentioned cooled sheet-shaped thermoplastic resin. Specific examples of the method (a) will be described below. As shown in Fig. 8, first, the mesh-shaped engineering sheet original UO is formed with irregularities. On the surface of the pattern 112a, the uncured liquid ionizing radiation-curable tree stalk 112c is applied by the coater 120. Then, the engineering sheet master 110 coated with the curable resin is passed through the roller 1 30, the hardening resin is filled in the inside of the concave-convex pattern 112a of the original sheet 11055.doc-44-200912388. Then, the ionizing radiation is irradiated by the ionizing radiation irradiation device 140 to make the curable resin And hardening. Then, the ionizing radiation-curable resin after hardening is removed from the original sheet 110, whereby a network-shaped light diffusing body 15 〇 can be produced. In the method (a), in order to impart mold release property, Before the application of the uncured ionizing radiation curable resin, a layer made of a polyoxyxylene resin, a fluororesin or the like may be provided on the surface of the original sheet on which the uneven pattern is formed. A coater for applying an uncured ionizing radiation curable resin to a surface on which a concave-convex pattern is formed on an original sheet of an engineering sheet includes a T-die coater, a roll coater, a bar coater, and the like. Examples of the uncured ionizing radiation-curable resin include one or more selected from the group consisting of epoxy acrylate vinegar, epoxidized oil acrylate, urethane acrylate, and unsaturated polyester. Prepolymer of polyester acrylate vinegar, polyether acrylate, ethylene/acrylate, polyene/acrylate, 矽_acrylate, polybutadiene, polystyrene decyl acrylate, aliphatic acrylic acid Ester, alicyclic acrylate, aromatic acryl acid, hydroxy-containing acrylate, allyl-containing acrylate 'glycidyl-containing acrylate, carboxyl-containing acrylate, ke-containing propyl Monomers such as sour milk. The uncured ionizing radiation curable resin is preferably diluted with a solvent or the like. Further, a fluororesin, a polyoxymethylene resin or the like may be added to the uncured ionizing radiation curable resin. When the uncured ionizing radiation-curable resin is hardened by ultraviolet rays 126510.doc -45- 200912388, it is preferable to add an anthraquinone class or a benzophenone to an uncured ionizing radiation curable resin. A photopolymerization initiator. After the application of the uncured liquid ionizing radiation curable resin, the substrate made of resin, glass or the like may be bonded and irradiated with ionizing radiation. The irradiation of the ionizing radiation may be carried out by any one of the substrate and the original sheet having ionizing radiation. The thickness of the ionized radiation curable resin sheet after hardening is preferably about 0.1 to 100 μηι. When the thickness of the ionizing radiation-curable resin sheet after hardening is 〇.1 μm or more, sufficient strength can be secured, and if it is 1 〇 () μηη or more, sufficient flexibility can be ensured. In the method shown in Fig. 8, the original sheet of the engineering sheet is a mesh, but it may be a single blade. When a single-blade work piece is used, a single-blade work piece can be used as a flat-plate mold marking method, and a single-blade work piece can be wound on a roll to be used as a roll-shaped embossing method for a cylindrical mold. Wait. Further, the original blade of the single blade may be placed inside the mold of the injection molding machine.

K However, in the method of using the single-blade engineering sheet, the step of forming the concave-convex pattern must be repeated a plurality of times for mass production of the light-diffusing body. When the release property of the ionizing radiation curable resin and the original sheet of the film is low, the concavo-convex pattern is clogged after repeated times, and the transfer of the uneven pattern tends to be incomplete. On the other hand, the method shown in FIG. 8 can form a concave-convex pattern over a large area and continuously because the original sheet of the engineering sheet is in a mesh shape. Therefore, even if the number of times of use of the concave-convex pattern forming sheet is small, The required number of light diffusers can be produced in a short time. 126510.doc -46· 200912388 In the methods (b) and (e), the liquid thermosetting resin may, for example, be an uncured melamine resin, a urethane resin or an epoxy resin. The hardening temperature in the method (b) is preferably lower than the glass transition temperature of the original sheet of the engineering sheet. ^ The hardening temperature is above the glass transition temperature of the original sheet of the engineering sheet, and the concave and convex pattern of the original sheet of the engineering sheet may be shaped when hardened. In the methods (c) and (f), the thermoplastic resin may, for example, be an acrylic resin, a polyolefin or a polyester. The pressure at which the sheet-like thermoplastic resin is pressed against the secondary engineering molded article is preferably 1 to just MPa. If the pressure is pressed! When the pressure is MPa or more, the uneven pattern can be transferred with high precision, and if the pressure at the time of pressing is ι MPa or less, excessive pressurization can be prevented. Further, the heating temperature of the thermoplastic resin in (c) is preferably lower than the glass transition temperature of the original sheet of the engineering sheet. The reason for this is that if the heating temperature is equal to or higher than the glass transition temperature of the original sheet of the original sheet, the concave and convex pattern of the original sheet of the blade may be deformed during heating. The cooling temperature and the subsequent cooling temperature are preferably smaller than the glass transition temperature of the thermoplastic resin from the viewpoint of accurately transferring the concave-convex pattern. In the methods (4) to (4), the heating step may be omitted, and (9) the angle at which the concave-convex pattern of the original sheet is prevented from being deformed is preferably a method (a) of using an ionizing radiation curable resin. The thickness of the material in the methods (d) to (f) is set to 50. The thickness of the shape is 50 Å. It is preferable to form the secondary work for metal into about 50,000 μm. If the secondary work for metal is used for μπι or more, the molded article for secondary engineering has sufficient strength of 126510.doc -47 - 200912388. If the thickness is 500 or less, sufficient resilience can be ensured. In the methods (4) to (f), a metal sheet having a small deformation due to the use of heat is used as a work piece, and thus any of the ionizing radiation curable resin, the thermosetting tree, and the thermoplastic resin can be used. The concave-convex pattern is used to form a sheet material. When the concave-convex pattern forming sheet produced by the methods (4) to (1) is used as a light diffusing body, in order to further enhance the light diffusing effect, the uneven pattern forming sheet may contain a light diffusing agent composed of the above inorganic compound and an organic compound composed of an organic compound. Light diffusing agent or fine bubbles. Further, in the methods (4) to (1), the concave-convex pattern of the original sheet of the engineering sheet is transferred onto a metal to obtain a molded article for secondary engineering, but it may be transferred onto a resin to obtain a molded article for secondary engineering. Examples of the resin which can be used at this time include polyacetic acid, polyacetal, polysulfone, and ionization-releasing resin which is used in the method (4). When the ionizing radiation curable resin is used, the coating of the ionizing radiation curable resin is hardened and peeled off in the same manner as in the method (4), whereby a molded article for secondary engineering is obtained. In the light diffusing body obtained as described above, an adhesive layer may be provided on the surface opposite to the surface on which the uneven pattern is formed. Further, a concave-convex pattern may be further formed on the surface opposite to the surface on which the uneven pattern is formed. In addition, it is also possible to use a protective layer as a protective layer without peeling off the embossed or embossed molded article used as the original of the engineering sheet, and the detachment is used before the use of the light diffuser. Floor. 126510.doc -48 - 200912388, the unevenness of the above-mentioned unevenness is formed. The uneven pattern of the uneven pattern forming sheet 10 on the light-diffusing body produced by the above-described manufacturing method is formed, and therefore the uniformity of the uniform diffusion is excellent. In the light diffusing body, other layers may be provided on one or both sides of the uneven pattern forming sheet. For example, in the surface of the concave-convex pattern forming sheet on which one side of the concave-convex pattern is formed, in order to prevent the escape from being disturbed, it is also possible to have a thickness containing fluororesin or poly-stone resin as a main component. (10) The anti-sweat layer on the left and right. Further, a support made of a transparent resin or a glass may be provided on the side of the light diffuser on the side where the uneven pattern is not formed. 5. Optical sheet 5-1 • First embodiment Hereinafter, a first embodiment of the optical sheet of the present invention will be described. Fig. 13 shows an optical sheet of this embodiment. Further, in Fig. 13, for the sake of convenience of explanation, the uneven portion 212 is enlarged, and its arrangement is displayed in a scattered manner. The optical sheet 21A of the present embodiment is used as a light diffusing sheet in which the light source 330 is disposed on one end 〇1 in the longitudinal direction, and is attached to the flat surface u, and is dispersed in a dot shape by the following pattern. The concave-convex region 212' having an elliptical shape is a pattern which gradually becomes denser as the one end α from the longitudinal direction of the optical sheet 210a faces the other end β. In the present invention, the term “flat” means that the center line average roughness described in JIS Β0601 is equal to or less than i.i μηη. Further, the uneven portion means that the center line average roughness described in JIS Β0601 exceeds 0.1 μm, especially 0.5 μm or more. • Concave-convex region The concavo-convex region 12 has a concavo-convex pattern. In the present embodiment, 126510.doc •49-200912388 is shown in Fig. 1. On the surface of the uneven portion 12, a meandering corrugated pattern 12a is formed. In the optical sheet 2 l〇a of the present embodiment used for the light-diffusing sheet, the optimum pitch A of the 疋 concave-convex pattern 12a is more than 1 μm and is 20 μη or less, more preferably more than 1 μm and is 1 〇μπι below. If the most frequent spacing a is less than i μιη ', the most frequent spacing a is less than or equal to the wavelength of visible light, so that visible light is not refracted by the concave-convex pattern 12a, but light is transmitted. If the most frequent spacing a exceeds the upper limit, The anisotropy of diffusion becomes low, and thus there is a tendency that brightness tends to be uneven. The ratio (B/A, hereinafter referred to as the aspect ratio) of the average depth b of the unevenness of the uneven pattern 12a to the most frequent pitch A of the concave-convex pattern 12&amp; is preferably 〇1 to 3. If the aspect ratio is less than 0 · 1, the target optical characteristics may not be obtained. On the other hand, when the aspect ratio is more than 3. 〇, there is a tendency that it is difficult to form the uneven pattern 12a at the time of manufacturing the optical sheets 21 〇 &amp; Here, the average depth B refers to the average depth of the bottom Ub of the concave-convex pattern 12a. Further, the bottom portion 12b refers to a very small point of the concave portion of the concave-convex pattern 12a, and the average depth B is a cross section obtained by cutting the uneven portion 12 in the short-diameter direction (see Fig. 2) for observation, from the entire optical sheet 1a The length I of the reference line L! parallel to the surface direction to the top of each convex portion, the average value (BAV) of the ratio, and the length from the reference line Li to the bottom of each concave portion ^^, b3· The difference between the average values (bAv) (bAV-BAV). As a method of measuring the average depth B, a method of measuring the depth of each bottom portion 12b of 1265l0.doc-50-200912388 in the image of the cross-sectional pattern of the concave-convex pattern 12& The average of these. As described in the present embodiment, the meandering pattern of the concavo-convex pattern 12a in one direction means that the degree of alignment of the concavo-convex pattern obtained by the following method is 〇3 or more. The alignment degree is a pointing ticket of the alignment unevenness pattern, and the larger the value is, the more uneven the alignment is. If the degree of alignment is less than 0.3 Å, the unevenness of the alignment of the concavo-convex pattern 12a is small, and therefore the diffusibility of light is small. Further, the degree of alignment is preferably 1. 〇 or less. If the degree of alignment exceeds J 〇, the direction of the concave = pattern 12a becomes random to some extent, so that the light diffusibility becomes high, but the anisotropy tends to be low. In order to achieve an alignment degree of 0.3 or more, for example, in the following production, the heat shrinkable film and the uneven portion forming convex portion can be appropriately selected. Further, a method of forming a transparent resin by using a metal mold having a concave-convex pattern having an orientation of 0 or more on one surface may be employed. The area ratio of the area of the uneven portion 212 to the area of one surface of the optical sheet 21 () 3 depends on the target light diffusibility, but is preferably 30 to 100. /(^) If the area ratio of the uneven region 212 is 3% or more, sufficient light diffusibility can be exhibited. • The optical sheet constituent material &quot; Optical sheet 21〇a has a high transmittance by visible light (specifically A transparent resin having a total light transmittance of 85% or more in visible light. Further, in order to improve heat resistance and richness, the optical sheet (10) can be formed without impairing optical characteristics such as light transmittance. It contains additives. As an additive 126510.doc -51 - 200912388, it can be listed as a light stabilizer, an ultraviolet absorber, an antioxidant, a lubricant light diffusing agent, etc. Among them, it is particularly preferable to add a light stabilizer, and the addition amount thereof is relatively high. In the case of the transparent resin (10), the amount of the light stabilizer is 0.03 parts by mass or more, and the addition effect is sufficient, but if the amount of the light stabilizer exceeds 2 〇, the amount of the light stabilizer is more than 2 〇. In this case, the amount of the light stabilizer is excessive, which tends to increase the unnecessary cost. Further, in order to further improve the light diffusion effect, the optical property can be made not to greatly impair the optical characteristics such as the light transmittance. The bird contains an inorganic light diffusing agent composed of an inorganic material and an organic light diffusing agent composed of an organic compound. Examples of the inorganic light diffusing agent include cerium oxide, white carbon, talc, magnesium oxide, zinc oxide, and titanium oxide. , carbonic acid, hydrogen hydroxide, copper sulfate, tannic acid, magnesium, Lai IS, acid sodium, zinc, glass, * mother, etc. τ as an organic light diffusing agent, exemplified by styrenic polymer particles, Acrylic acid: a polymerized particle, a siloxane polymerized particle, a polyamidated polymer particle, etc. «The light diffusing agent may be used singly or in combination of two or more. ° For excellent light scattering The light diffusing agent may be a porous structure such as a petal shape or a spherical crystal. 0 From the viewpoint of impairing light transmittance, the content of the light diffusing agent is preferably 100 parts by mass relative to the transparent resin. It is 1 part by mass or less. Further, in order to improve the light diffusion effect, the optical sheet may be finely contained within a range of optical properties such as light transmittance of 126510.doc -52-200912388.The fine bubbles absorb less light, and it is difficult to reduce the light transmittance. As a method of forming fine bubbles, a method of mixing a foaming agent into the optical sheet 21 can be applied (for example, Japanese Patent Laid-Open No. 5-2ΐ28ΐι The method disclosed in Japanese Laid-Open Patent Publication No. Hei No. Hei. No. Hei. No. Hei. In addition, in order to achieve a more uniform surface irradiation, the method of forming the fine bubbles is preferably a method of uniformly foaming a specific position (for example, disclosed in Japanese Laid-Open Patent Publication No. 2006-124499) method). Further, the above light diffusing agent may be used in combination with fine foaming. • Thickness of the optical sheet The thickness of the optical sheet 10a is preferably 〇 2 to 3 〇 mm, more preferably 2·5 mm, and particularly preferably 0·1 to 2.0 mm. If the thickness of the optical sheet 10a is less than 0.02 mm, since the thickness thereof is smaller than the depth of the concave-convex pattern 12&amp; and the thickness of the optical sheet 10's is less than 3.0 mm, the optical sheet 10a may be difficult to handle because of its large mass. The optical sheet 21A may also be composed of two or more resin layers. Even when the optical sheet 10a is composed of two or more layers, the thickness of the optical sheet is preferably 0.02 to 3.0 mm. • How to use Light diffuser. Specifically, the optical sheet 210a is used at one end α. The optical sheet 210a is used as the 2 1 0a system so that the light source 3 3 〇 is disposed adjacent to one end 31 of the optical optical sheet 21A, and the light source 33 is disposed, whereby the light can be applied to the optical sheet 126510.doc •53·200912388 21〇 Propagation within a. Further, the light propagating in the optical sheet 21a is diffused in the uneven portion 212, whereby light can be emitted from the surface on which one side of the uneven portion 212 is formed. Further, since the uneven region 212 is disposed by being gradually densified from the one end & toward the other end β, the amount of light emitted can be increased toward the other end β. In general, the intensity of light propagating in the optical sheet 21〇a becomes weaker as it goes away from the light source 310, but since the amount of light emitted increases toward the other end β, it can be made from the optical sheet 21. The intensity of the light emitted by 〇a is uniform. When the optical sheet 210a is used, it is preferable to provide a reflecting plate on the surface having no uneven portion 212 in order to increase the utilization efficiency of the light of the light source 33. In the optical sheet 21a of the first embodiment described above, the light diffusing property is exhibited by the uneven pattern 12a formed on the surface of the uneven portion 21 2 . Further, the uneven region 212 is disposed in a pattern in which the other end of the optical sheet 210a is elongated, so that the light diffusibility becomes higher on the other end side in the longitudinal direction. As described above, since the light diffusibility can be adjusted by the unevenness of the uneven regions 212, the optical sheet 210a can easily obtain the desired light diffusibility at a desired position. • Manufacturing Method An example of a method of manufacturing the optical sheet 21 〇a will be described below. (First Manufacturing Method) The first manufacturing method is a method of producing an optical sheet 2i〇a using a heat shrinkable film. That is, the first manufacturing method has the following manufacturing steps for producing a concave-convex pattern forming sheet of the optical sheet 210a, and the manufacturing step refers to: 126510.doc •54·200912388 one side of the heat shrinkable film, the printing surface is smooth The resin-made uneven portion forming convex portion is formed to form a printed sheet (hereinafter referred to as "first step"), and the heat shrinkable film is heated and shrunk so that at least the concave-convex region forming convex portion of the printed sheet is deformed by folding (Hereinafter, it is called the 2nd step). In the first step, as shown in FIG. 14 and FIG. 15 , as a method of printing the uneven portion 14 on one surface of the heat shrinkable film 13 , for example, screen printing or gravure printing can be applied. , lithography, inkjet printing, etc. As the heat shrinkable film 13, for example, a polyethylene terephthalate-based shrink film, a polystyrene-based shrink film, a polyolefin-based shrink film, a polyvinyl chloride-based shrink film, or the like can be used. Among the heat shrinkable films 213, it is particularly preferable to shrink the shrink film of 5 〇 to 7 〇%. When a shrink film having a shrinkage of 50 to 70% is used, the deformation ratio can be made 5 % by or more, and the optimum pitch A of the uneven pattern 12 a can be easily made to be more than 1 μηι and 20 μηι or less, and the aspect ratio is 〇 > 1 The above concavo-convex pattern forms a sheet. Here, the deformation rate means (length before deformation - length after deformation) / (length before deformation) xl 〇〇 (%), or means (length after deformation) / (length before deformation) X100 (%). The uneven portion forming convex portion 214 has a glass transition temperature higher than that of the resin (first resin) constituting the heat shrinkable film 213 by more than one 角度 from the viewpoint of easily forming the meandering corrugated pattern 12a. The resin (second resin) is composed of. As the second resin, for example, polyvinyl alcohol, polystyrene, propylene ^26510.doc -55-200912388 acid resin, styrene-acrylic acid copolymer, styrene-acrylonitrile copolymer, polyterephthalic acid can be used. Ethylene glycol ester, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyether sulfone, fluororesin, and the like. The surface of the uneven portion forming convex portion 214 refers to a center line average roughness of 0.1 μm or less as described in JIS B0601, from the viewpoint of easily forming the desired uneven pattern 12a. Further, the thickness of the uneven portion forming convex portion 214 is preferably 0.05 to 5. 〇 Km' is more preferably 〇1 to 1 〇 μη1. When the thickness of the uneven portion forming convex portion 214 is in the above range, the most frequent pitch A of the uneven pattern 12a can be reliably more than 1 μm and not more than 2 μm. However, if the thickness of the uneven portion forming convex portion 142 14 is less than 0·〇5 μm, the most frequent pitch Α may be 1 μηι or less. If the thickness of the uneven portion forming convex portion 214 exceeds $ 〇, the most The frequency spacing A sometimes exceeds 2 〇. Further, the thickness of the uneven portion forming convex portion 214 may not be fixed. For example, it may be continuously thickened in one direction or continuously thinned in one direction. Further, from the viewpoint of the corrugated concave-convex pattern 12 &amp; which is more likely to form a serpentine, the Young's modulus of the concave-convex region forming convex portion 214 is preferably 〇·01 〜3〇〇GPa', and more preferably 0.1. ~ lOGPa. In the second step, the heat-shrinkable film 213 is formed on the convex region forming projection, and the wave-shaped concave-convex pattern 12a is formed in a direction perpendicular to the contraction direction to obtain the uneven portion 212 (refer to FIG. 16). ). As a heating method for heating and shrinking the heat shrinkable film 213, 126510.doc-56-200912388 can be exemplified by a method of passing through hot air, steam or hot water, etc., wherein the heat shrinkable film 213 can be uniformly shrunk. In terms of angle, it is especially good to pass the method in hot water. In the manufacturing method, the thinner the thickness of the uneven portion forming convex portion 214 and the lower the Young's modulus of the concave-convex region forming convex portion 214, the smaller the minimum frequency spacing A of the concave-convex pattern 12a is. The higher the deformation rate of the shrinkable film, the deeper the average depth B. In the first manufacturing method, in the case of the temperature between the glass transition temperature of the first resin and the glass transition temperature of the second resin, the Young's modulus of the uneven portion forming convex portion 214 is higher than that of the heat shrinkable film 213. Young's modulus. Therefore, when the temperature between the glass transition temperature of the first resin and the glass transition temperature of the second resin is processed, the uneven portion forming convex portion 214 is folded as compared with the thickness increase ‘. Further, since the uneven portion forming convex portion 214 is laminated on the heat shrinkable film 213, the stress generated by shrinkage of the heat shrinkable film 213 is uniform as a whole. Therefore, the heat shrinkable film 213 is shrunk, so that the uneven portion forming convex portion 214 is deformed in a folded manner, whereby the uneven portion 212 can be formed. Therefore, according to the above manufacturing method, the uneven pattern forming sheet which becomes the optical sheet 210a can be obtained. The uneven pattern forming sheet obtained in the above manner can be directly used as the optical sheet. In this case, the optical sheet 21〇a is formed by heating the shrinkable film 2丨3 and the uneven portion forming convex portion 214. (Second Manufacturing Method) The second manufacturing method is a method in which the concave-convex pattern obtained by the first manufacturing method is used to form the optical sheet 21〇a as the original sheet of the engineering sheet. The original sheet may be in the form of a single blade or may be a continuous sheet or mesh. Specific examples of the second production method include the following methods (a) to (c): Method (a) The method includes the steps of: coating unhardened on the surface of the original sheet on which the concave-convex pattern is formed The ionizing radiation curable resin; and irradiating the ionizing radiation to cure the curable resin, and then peeling off the cured coating film from the original sheet. Here, the ionizing radiation generally means ultraviolet rays or electron rays', and the present invention also includes visible light rays, X-rays, ion rays, and the like. Method (b) The method includes the steps of: applying an unhardened liquid thermosetting resin on a surface on which the concave-convex pattern is formed on the original sheet of the engineering sheet; and heating to cure the liquid thermosetting resin, and then self-curing The hardened coating film is peeled off from the original of the engineering sheet. Method (c) The method comprises the steps of: contacting a sheet-like thermoplastic resin to a surface of the original sheet of the engineering sheet on which the concave-convex pattern is formed; pressing the sheet-shaped thermoplastic resin on the original sheet of the engineering sheet' and in this state Heating is performed to soften it, followed by cooling; and on the self-defense sheet original (4) the above-mentioned cooled sheet-shaped thermoplastic resin. Further, it is also possible to produce a molded article for secondary engineering using the original sheet of the engineering sheet, and to manufacture the optical sheet 1 using the molded article for secondary engineering as a specific use of the molded article of 126510.doc -58-200912388 The method includes the following methods (d) to (1): Method (d) The method includes the steps of: performing metal plating of nickel or the like on the surface on which the concave-convex pattern is formed on the original sheet of the engineering sheet to laminate the plating layer; The electroplated layer is peeled off from the original sheet to prepare a metal-made secondary engineering molded product; and then 'unhardened ionizing radiation hardening is applied on the side of the second engineering molded article in contact with the concave-convex pattern. The resin is irradiated with ionizing radiation to cure the curable resin, and then the cured coating film is peeled off from the secondary engineering molded article. Method (e) The method comprises the steps of: laminating an electric clock layer on a surface on which a concave-convex pattern is formed on an original sheet of an engineering sheet, and peeling off the electric ore layer from the original sheet of the engineering sheet to prepare a metal-made secondary engineering forming product Applying an unhardened liquid thermosetting resin to the surface on the side in contact with the concavo-convex pattern of the secondary engineering molded article; and curing the resin by heating, and then molding the secondary engineering product The hardened coating film is peeled off. Method (f) The method comprises the steps of: forming a layer of electro-mineral layer on the surface of the original sheet on which the concave-convex pattern is formed, and stripping the electro-mineral layer from the original sheet of the engineering sheet to prepare a second-time engineering molded article made of metal The sheet-shaped thermoplastic resin is brought into contact with the surface of the secondary engineering molded article in contact with the concave-convex pattern; and the sheet-shaped thermoplastic resin is pressed against the secondary engineering molded article, and The film was softened by heating in the state, and then cooled; and the cooled sheet-like thermoplastic 126510.doc-59-200912388 resin was peeled off from the secondary engineering molded article. Specific examples of the method (a) will be described below. As shown in Fig. 8, first, the unhardened liquid ionizing radiation curable tree raft is applied to the surface of the ''circular shape of the original sheet 11' on which the uneven pattern ii2a is formed by the coater 120. 112c. Then, the engineering sheet precursor 涂布ι〇 coated with the curable resin is pressed by the roll 130, and the curable resin is filled in the concave-convex pattern 112a of the original sheet 110. Thereafter, the ionizing radiation is irradiated by the ionizing radiation irradiating device 140 to crosslink and harden the curable resin. Then, the hardened ionizing radiation curable resin is peeled off from the original sheet of the engineering sheet, whereby the optical sheet 210a of the mesh shape can be produced. In the method (a), in order to impart releasability, before the application of the uncured ionizing radiation curable resin, a polycrystalline yttrium having a thickness of about nm may be provided on the surface of the original sheet on which the uneven pattern is formed. A layer composed of a resin and a fluororesin. As a coater for applying an uncured ionizing radiation curable resin to the surface on which the concave-convex pattern is formed on the original sheet of the engineering sheet, a τ-die coater, a roll coater, a bar coater, or the like can be given. Examples of the uncured ionizing radiation curable resin include one or more selected from the group consisting of epoxy acrylate, epoxidized oil acrylate, urethane acrylate, unsaturated polyester, and polyester. Prepolymers of acrylate, polyether acrylate, ethylene/acrylate, polyene/acrylate, fluorenone acrylate, polybutadiene, polystyrene methyl methacrylate, etc., aliphatic acrylate, alicyclic Acrylate, aromatic acrylate, hydroxy-containing acrylate, allyl-containing acrylate, condensate 126510.doc -60- 200912388 glyceryl acrylate, carboxyl group-containing acrylate, halogen-containing group C, such as @文Sg and other monomers. The uncured ionizing radiation curable resin is preferably diluted with a solvent or the like. Further, a fluororesin, a polyoxymethylene resin or the like may be added to the uncured ionizing radiation curable resin. When the uncured ionizing radiation curable resin is cured by ultraviolet rays, it is preferred to add a photopolymerization initiator such as phenylacetic acid I or benzophenone to the uncured ionizing radiation curable resin. . The method (d) is specifically the same as the above method (a) except that the original sheet of the method in the method is changed to a molded article for secondary engineering produced by using the original sheet of the sigma sheet. In the methods (b) and (e), examples of the liquid thermosetting resin include, for example, an unhardened dimeric gas amine resin, a polyurethane resin, and an epoxy resin. Further, the hardening temperature in the method (b) is preferably lower than the glass transition temperature of the original sheet of the engineering sheet. If the hardening temperature is the glass transition temperature of the original sheet of the engineering sheet

Above, the concave-convex pattern of the original sheet of the engineering sheet may be deformed at the time of hardening. Examples of the transparent thermoplastic resin in the methods (c) and (f) include styrene-methyl methacrylate copolymer (MS), polymethyl methacrylate (PMMA), and polystyrene (PS). Cycloolefin polymer (c〇p), polycarbonate (PC), polypropylene (PP), polyethylene terephthalate (pE), polyether oxime (PES), polyvinyl chloride (PVC) , resin such as polyethylene terephthalate (PET). Among these, from the viewpoint of forming processing, from the viewpoint of hygroscopicity and particularly good, MS, PMMA, PS, COP, pc 126510.doc -61 - 200912388, 'better is The styrene content in the MS is from 30 to 90% by mass. These transparent thermoplastic resins can be configured in a single layer or a multilayer structure. For example, a transparent thermoplastic resin or the like having a three-layer structure in which a pmma layer is provided on both sides of the PS layer can be used. Further, it is also possible to use a resin having a refractive index on the surface of the above transparent thermoplastic resin. Examples of the resin having a high refractive index include a fluorene-based epoxy compound, a fluorene-based acrylate compound, a fluorene-based polyester (〇KP), a polymethylphenyl stone hospital (PMPS), and a polydiphenyl stone smelting (PDPS). ) Wait. In the method (c), the pressure at which the sheet-like thermoplastic resin is pressed against the original sheet of the engineering sheet, and the pressure at which the sheet-shaped thermoplastic resin is pressed against the second-process molded article in the method (1) is preferably hiOO. MPa. When the pressure at the time of pressing is 1 MPa or more, the uneven pattern can be transferred with high precision, and if the pressure at the time of pressing is 100 MPa or less, excessive pressurization can be prevented. Further, the heating temperature of the thermoplastic resin in the method (c) is preferably lower than the glass transition temperature of the original sheet of the engineering sheet. The reason for this is that if the heating temperature is equal to or higher than the glass transition temperature of the original sheet of the original sheet, the concave-convex pattern of the original sheet of the engineering sheet may be deformed upon heating. From the viewpoint of allowing the uneven pattern to be transferred with high precision, the cooling temperature after heating is preferably smaller than the breakage temperature of the thermoplastic resin. 'Dish (third manufacturing method) The third manufacturing method is to provide a concave-convex pattern forming sheet made of metal 1265l0.doc-62-200912388 or a metal compound concave-convex region on the surface of the resin layer as the original sheet of the engineering sheet. A method of manufacturing the optical sheet 21 〇3. The uneven pattern forming sheet provided with the uneven portion made of a metal or a metal compound can be obtained by replacing the convex portion for forming a concave-convex region made of a resin with a convex portion for forming a concave-convex region made of a metal or a metal compound. The concave-convex region forming convex portion was formed by vapor deposition instead of printing, and was obtained in the same manner as in the first production method. In other words, the method for producing a concave-convex pattern forming sheet provided with a concave-convex region made of a metal or a metal compound includes the steps of vacuum-depositing a convex portion for forming a concave-convex region made of a metal or a metal compound on one surface of the heat-shrinkable film. To form a vapor-deposited sheet; and to heat-shrink the heat-shrinkable film so that at least the uneven portion forming convex portion of the vapor-deposited sheet is deformed by folding. In the method for producing the concavo-convex pattern forming sheet, the metal or metal compound: the Young's modulus of the convex portion for forming the uneven portion is much larger than the Young's modulus of the heat shrinkable film 1 and thus the uneven portion when thermally compressed The formation of the convex portion is not so much the thickness is increased, but it is better to say that it is folded. As a result, it is possible to obtain the uneven pattern holding region and the optical sheet 2 provided with the unevenness h-domain; Further, the unevenness of the concave-convex pattern forming sheet is the same as the uneven area of the special film 210a. As for the third manufacturing of the genus, the genus of the genus, the embossing of the embossing of the embossing of the embossing of the embossing Shi, Shi Xi,: silver, stern, copper, bismuth, indium, magnesium, sharp, Ji, wrong, genus. The metal at least in the group of '&lt;&gt; is also a semi-metal. I26510.doc -63 - 200912388 As a metal compound, for the same reason, it is preferably selected from the group consisting of titanium oxide, aluminum oxide, zinc oxide, magnesium oxide, tin oxide, copper oxide, oxidized steel, oxidized bromine, oxidized, #,Μ _ At least one metal compound of the group consisting of magnesium sulfide and gallium arsenide. The surface of the uneven portion forming convex portion means that the center line average roughness described in JIS B0601 is 〇_1 μηι or less from the viewpoint of easily forming the desired uneven pattern 12a. The thickness of the convex portion for forming the uneven portion made of a metal or a metal compound is preferably 〇01 to 〇.2_'. .05 〇 〇 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 However, if the thickness of the convex portion for unevenness is less than (10), the maximum frequency spacing A becomes 1 μη or less, and exceeds 0.2 筲 20_. The material pitch Α may sometimes exceed the thickness of the convex portion for forming the uneven portion, and may not be fixed. For example, the thickness may be continuously increased and thinned in one direction. When the metal or the region forming convex portion is vapor-deposited on the heat-shrinkable film in a continuous direction, the unevenness of the heat-shrinkable film material is formed by the convex portion and the surface of the concave-convex region to be formed. Leave the cover. The pattern and the opening of the cover serve as a heating shrinkage film for heat shrinking. ^^加古J. The method of passing through hot air, steam or hot water, etc., can be cited as 'from the heating can be 126510.doc • 64 - 200912388 In terms of uniform shrinkage of the shrinkable film, it is particularly preferable to pass it in hot water. Specifically, in the method (a) to (f) in the second production method, a concave-convex pattern forming sheet provided with a concave-convex region made of a metal or a metal compound is used as the third method. The original sheet of the engineering sheet is formed by forming a concave-convex pattern in which the uneven portion of the second resin is placed in place of six. (Fourth Manufacturing Method) The fourth manufacturing method is a method of manufacturing an optical sheet 10a from an unformed transparent thermoplastic resin using a molding apparatus, and the molding apparatus includes a metal mold, a heating and cooling mechanism for heating and cooling the metal mold, and And a pressurizing mechanism for pressurizing the metal mold. The transparent thermoplastic resin used in the fourth production method may be the same as the transparent thermoplastic resin used in the second production method. Specifically, in the fourth manufacturing method, first, the particles or powder of the transparent thermoplastic resin are filled in a metal mold, the metal mold is heated by a heating and cooling mechanism, and the metal mold is pressed by a pressurizing mechanism. Pressurize. Next, the inside of the mold is cooled by the heating and cooling mechanism and the pressurization is stopped to obtain the optical sheet 2 1 〇 a. In the manufacturing method, a meandering corrugated pattern is formed on the surface in contact with the exit surface of the optical sheet 210a as a metal mold. For example, a corrugated pattern in which the meandering pattern forming sheets in the first to third manufacturing methods are attached to one surface, and a meandering corrugated pattern is formed on one surface by laser irradiation or the like. As the molding method in the fourth production method, for example, press forming 126510.doc-65-200912388 method or injection molding method can be applied. The optical sheet 21A obtained by the above-described first to fourth production methods can be used as it is, and can be bonded to a substrate made of a transparent resin or glass by an adhesive to form a final optical sheet. In the method of manufacturing the optical sheet 210a described above, it is easy to arrange the uneven region 212 in a pattern which is denser on the other end β side in the longitudinal direction of the optical sheet 210a. Therefore, the optical sheet 21 〇 a having a high light diffusibility on the β side of the other end in the longitudinal direction can be easily obtained. 5 - 2 - Second Embodiment Hereinafter, a second embodiment of the optical sheet of the present invention will be described. Fig. 17 shows an optical sheet of this embodiment. Further, in the drawings, in order to facilitate the explanation, the uneven portion 215 is enlarged, and the arrangement thereof is displayed in a scattered manner. The optical sheet 210b of the present embodiment is used as a light diffusing sheet in which the light source 330 is disposed on one end 〇1 in the longitudinal direction, and is attached to the flat one surface 211, and is disposed along the optical sheet 2 by the following pattern. The strip-shaped uneven region 215 formed in the width direction of the 丨〇b, that is, a pattern which gradually becomes denser as one end α from the longitudinal direction of the optical sheet 21〇b faces the other end β. When the uneven portion 21 5 is disposed as described above, the light diffusibility can be improved on the other end ρ side of the optical sheet 21 〇 b in the same manner as the optical sheet 210a of the second embodiment. The uneven pattern of the uneven portion 215 of the second embodiment is the same as the concave-convex pattern 12a of the uneven portion 212 of the second embodiment. The area ratio of the area of the uneven portion 215 to the area of one surface of the optical sheet 210b is also the same as the area ratio in the first embodiment. 126510.doc •66· 200912388 The optical sheet 21 of the second embodiment can be used with the first! The optical sheet 2l〇a of the embodiment is produced by the same manufacturing method. 5-3. Third embodiment Hereinafter, a third embodiment of the optical sheet of the present invention will be described. Fig. 18 shows an optical sheet of this embodiment. Further, in Fig. 8, for the sake of convenience of explanation, the uneven portion 216 is enlarged, and the arrangement thereof is displayed in a scattered manner. The optical sheet 210c of the present embodiment is used as a light diffusing sheet in which the light source 330 is disposed on one end 〇1 in the longitudinal direction, and is attached to the flat one surface 211, and the optical sheet 21〇c is dispersedly arranged along the longitudinal direction. The strip-shaped portion 2丨6a and the strip-shaped uneven portion 216 formed along the strip-shaped portion 16b in the width direction. The portion 2161 of the uneven portion 216 along the width direction of the optical sheet 210c is configured to be gradually densified as the one end α from the longitudinal direction of the optical sheet 210c faces the other end β. The uneven pattern of the uneven portion 216 of the third embodiment is the same as the uneven pattern 12a of the uneven portion 212 of the first embodiment. The area ratio of the area of the uneven portion 216 to the area of one surface of the optical sheet 210c is also the same as the area ratio in the first embodiment. The optical sheet 210c of the third embodiment can be produced by the same manufacturing method as the method of manufacturing the optical sheet 210a of the first embodiment. 5-4. Fourth embodiment Hereinafter, a fourth embodiment of the optical sheet of the present invention will be described. Fig. 19 shows an optical sheet of this embodiment. Further, in Fig. 19, for the sake of easy explanation, the uneven portion 21 7 is enlarged' and its arrangement is displayed in a scattered manner. The optical sheet 210d of the present embodiment is used as a light diffuser in which a linear light source 330 is disposed on a surface C on which one side of the uneven portion 126510.doc-67-200912388217 is not formed. Further, in the optical sheet 210d, an uneven region 217' having an elliptical shape is dispersedly disposed on the flat surface 211, and the uneven portion 217 is denser as it is closer to the light source 330. In the present embodiment, the light from the light source 330 is unevenly incident on the optical sheet 210d. However, since the portion where the stronger the light reaches, the arrangement of the uneven portion 217 becomes denser, so that the light can be emitted in a diffused state. . Therefore, the intensity of light emitted from the optical sheet 2 10 0d can be made uniform. The fourth embodiment is the same as the concave-convex pattern 12a of the uneven portion 212 of the first embodiment. The area ratio of the area of the uneven portion 217 to the area of one surface of the optical sheet 210d is also the same as the area ratio in the first embodiment. The optical sheet 21 〇d of the fourth embodiment can be produced by the same manufacturing method as the method of manufacturing the optical sheet 21a of the first embodiment. 5-5. Other Embodiments % "The optical sheet of the present invention is not limited to the above embodiment. For example, in the first embodiment and the fourth embodiment, the uneven portion is formed in an elliptical shape, but may be a circular shape or a rectangular shape. Further, in the rice cake of the present invention, the uneven regions may be formed at random. Further, the concave-convex pattern of the uneven portion may not be meandering but may be linear. Further, the uneven regions may be formed on both surfaces of the optical sheet. Further, the optical sheet can also be reinforced by the reinforcing substrate. 6. Diffusion Light Guide The sorrow of the automobile is said to be 126510.doc -68· 200912388 Fig. 1 shows the diffused light guide of the present embodiment. The diffused light guide 10 of the present embodiment is composed of a transparent resin layer 11 in which a meandering corrugated pattern 12a is formed on one of the faces. In the other surface (back surface) of the transparent resin layer in the present embodiment, a smooth surface having a concave-convex pattern is not formed. The most frequent pitch A of the concavo-convex pattern 12a exceeds 1 μm and is preferably 2 μηη and 10 μιη or less. If the most frequent spacing is μηι, the most frequent spacing A is below the wavelength of visible light, so the visible light is not refracted by the irregularities, but the light is transmitted, if the most frequent spacing A exceeds

In Pm, the anisotropy of diffusion becomes low, which tends to cause uneven brightness. The ratio of the average depth axis of the concavities and convexities of the concavo-convex pattern 12a to the most frequent pitch A of the concavo-convex pattern ( (B/A, hereinafter referred to as the aspect ratio) is preferably 〇1 to 3〇. When the aspect ratio is insufficient (M, the anisotropy of diffusion becomes low, and luminance unevenness is likely to occur. On the other hand, when the aspect ratio is larger than 3. 〇, it is difficult to form the uneven pattern 12a when the diffusing light guide 10 is manufactured. Where, the average deep sound η &amp; butyl, 1 and the degree B refers to the average depth of the bottom portion 12b of the concave-convex pattern 12a. Further, the bottom of the 丨 总 总 总 ' ' ' 糸 糸 凹凸 凹凸 凹凸 凹凸 凹凸 凹凸 凹凸 凹凸 凹凸 凹凸 凹凸 糸 糸?? refers to the reference line L1 to the direction in which the diffused light guide M1 is loaded in the longitudinal direction, and is parallel to the direction of the surface of the entire diffused light guide 10 T at the top of the convex part: 2, the average value of 3... _^^ As the square of the average depth B measured by the atomic force microscope, the following method is used: the bottom of the measurement (4) The depth is obtained and the image of the profile of the 4: value is obtained. 126510.d〇c - 69 · 200912388 The meandering in the present invention means that the degree of alignment of the irregularities obtained by the following method is 〇_3 or more. The alignment degree is an index of the unevenness of the alignment of the concavities and convexities, and the larger the value is, the more uneven the alignment is. To determine the alignment, the surface of the concave and convex pattern is first photographed by a surface optical microscope, and the image is converted into a grayscale document (e.g., t逬 format, etc.). In the image of the grayscale document (refer to Fig. 3), the lower the whiteness, the deeper the bottom of the concave portion (the higher the whiteness, the higher the top portion of the bar). Then, Fourier transform is performed on the image of the grayscale document. The Fourier transformed image is shown in Figure 4. The white portion extending from the center of the image of Fig. 4 to both sides contains information on the distance and orientation of the concave-convex pattern (2). Next, the auxiliary line ^ is drawn in the horizontal direction from the center of the image of Fig. 4, and the brightness on the auxiliary line is drawn (refer to Fig. 5). In the drawing of Fig. 5, the horizontal axis represents the pitch, the vertical axis represents the frequency, and the frequency has the largest value χ represents the most frequent pitch of the uneven pattern 12a. Next, in Fig. 4, the auxiliary line L3 of the bow is orthogonal to the auxiliary line h at a portion of the value ,, and the brightness on the auxiliary line Ls is drawn (refer to Fig. 6). In order to compare with various concavo-convex structures, the horizontal axis of Fig. 6 is a value obtained by dividing the X value. The horizontal axis of Fig. 6 indicates an index (orientation) indicating the degree of inclination with respect to the direction in which the unevenness is formed (the vertical direction in Fig. 3), and the vertical axis indicates the frequency. The half value width % of the peak in the stroke of Fig. 6 (the width of the peak at a height of one half of the maximum value) indicates the alignment degree of the concave-convex pattern. The larger the half-value width W!, the more random the pitch is. If the above-described alignment degree is less than 〇3, the alignment of the concavo-convex pattern 12a is uneven. 126510.doc 70-200912388 is smaller, so the anisotropy of light diffusion becomes smaller. Also, the degree of alignment is preferably one phase. If the degree of alignment exceeds..., the direction of the concave-convex pattern becomes _Lr to a certain extent, so that the light diffusibility becomes high, but the anisotropy tends to be low. In order to achieve an alignment degree of 0.3 or more, for example, in the production described below, a hard layer having a heat shrinkable film and a surface 卞μ can be appropriately selected. For example, the higher the shrinkage ratio of the heat-shrinkable film or the smaller the Young's modulus of the hard layer which is smoother than the surface of θ, the greater the alignment. The diffusion light guide 10 obtained by the production method is composed of two resin layers. Further, a method in which a transparent resin is formed by using a metal mold having a concave-convex pattern of =0.3 or more on one surface is used. The layer formed by the manufacturing method. Diffusion lead precursor 1. The least-frequency spacing obtained by using a layer of resin in the above manner by Fourier transform is the same as the average pitch. v v The transparent resin layer U is composed of a transparent resin having a high transmittance of visible light (specifically, the total light transmittance is 85%). Light: Special: Improves heat resistance and richness. 'In the dry square of the raw material without damaging the light transmittance, etc.' In the transparent resin layer u, it contains additives = agent light: light stabilizer, ultraviolet absorber , antioxidants, Runxian expansion agents, etc. Among them, it is particularly preferable to add a light stabilizer, and it is a mass of 1 (10) parts by mass relative to the transparent resin. If the addition amount of the 氺 — 二 二 二 — 薏 薏 薏 为 为 为 为 为 为 为 为 为 为 则 添加 添加 添加 添加 添加 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 126 There is an excess of stabilizers' and thus there is a tendency for unnecessary cost increases. In the second embodiment, the inorganic light diffusing agent and the light diffusing agent composed of the inorganic compound are contained in the transparent resin layer 11 in a range in which the light diffusing effect is not further improved. The "organic compound composed of organic compounds as inorganic light diffusing agents, including dioxane, white carbon, talc, magnesium sulfate, zinc oxide, titanium oxide, calcium carbonate, aluminum hydroxide, barium sulfate, tannic acid, Shi Xi Acid town, Shixi acid soda, Shiqi acid sodium, Shixi acid, glass, mica, etc. As the organic light diffusing agent, styrene (tetra) polymer particles, acrylic polymer particles, and siloxane polymer particles can be cited. Polyimide-based polymer particles, etc. These light-diffusing agents may be used singly or in combination of two or more. In order to obtain excellent smear characteristics, the light diffusing agent may be used as a petal or a ball. A porous structure such as a crystal. The content of the light diffusing agent is preferably 1 part by mass or less based on 100 parts by mass of the transparent resin from the viewpoint of being less likely to impair the light transmittance. Further, in order to increase the amount of money The scattering effect is such that the fine resin bubbles are contained in the transparent resin layer 11 within a range that does not greatly impair the optical characteristics such as the light transmittance. The fine bubbles absorb less light and are less likely to lower the light transmittance. For the formation method, a method of mixing a foaming agent into a transparent resin core can be applied (for example, the method disclosed in Japanese Laid-Open Patent Publication No. Hei 5-212811, Japanese Patent Application Laid-Open No. Hei No. Hei 6-107842), and acrylic 126510.doc-72 - 200912388 The foaming resin is subjected to a foaming treatment so as to contain a microscopic method as disclosed in the Japanese Patent Laid-Open No. 2004-2812: a method (for example, a more uniform surface irradiation can be realized). +&amp;,·&gt; m, , and 瑕 瑕 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡 泡The light diffusing agent and the fine foaming may be used in combination. The thickness of the transparent resin layer U is preferably 0 02 〜 3 〇 _, and more preferably 〇 Γ 0 Γ 2 5 bribe 'especially good Μ Μ Μ. When the thickness of the resin layer 11 is less than 0_02 mm, the thickness thereof is less than the depth of the concave-convex pattern, and if the thickness is thicker than 3·〇_, the quality of the diffused light guiding member (7) may be difficult to handle due to the large mass. The resin layer U may also be composed of two or more resin layers. Even when the transparent resin layer 11 is composed of two or more layers, the thickness of the transparent resin layer u is preferably 0.02 to 3.0 mm. The manufacturing method can be the same as the manufacturing method of the above optical sheet. The function of the above-described diffuser light guide body 10 has an anisotropic diffusibility of light. Specifically, it is not disposed on the side (back side) side of the side of the diffused light guide body 10 on which the uneven pattern i 2a is not formed. When there is a light source, light emitted from the light source enters the diffusing light guide 10 from the back surface, and passes through the inside of the diffusing light guide 10 to reach the uneven surface. Here, the incident angle is 0 degrees or more and reaches the angle less than the critical angle. The light is emitted outside the diffusing light guide 10 in a state of being refracted. Since the direction of the light passing through the diffusing light guiding body 1 〇 126510.doc -73- 200912388 is not one direction, the angle between the concave-convex surface of the diffusing light guiding body 1 and the light is not fixed, so the light is refracted at a wide angle. Further, since the irregularities are meandering and the alignment is uneven, the anisotropy of diffusion is high. Further, the light reaching the concave &amp; face at an angle above the critical angle is totally reflected and then traveled in the diffused light guide body, but then exits when reaching the concave-convex surface at an angle less than the critical angle. Again, the angle of incidence is. The light reaching the angle does not refract, and the 疋 directly exits beyond the diffusing light guide. Further, when a light source is provided on one side surface side of the diffused light guide body 10, as in the case described above, the light incident in the light guide body 10 after the incident angle is 0 degrees or more and reaches the angle of the critical angle is refraction. Out of the diffused light guide. Here, since the irregularities are meandering and the alignment is uneven, the anisotropy of diffusion is high. Furthermore, the diffusing light guide of the present invention is not limited to the above embodiment. For example, when a light source is disposed on the back side of the transparent resin layer, in order to improve the light incident efficiency, it is preferable that the back (4) of the transparent resin layer has fine undulations having an antireflection function. Here, it is preferable that the finest pitch of the fine wave-like irregularities is ί _ or less, and the aspect ratio is 01 or more. The reason is that the anti-reflection function cannot be obtained if the most frequent pitch exceeds 丨_, or if the aspect ratio exceeds 0.1 ’. The fine wavy irregularities described above can be formed on the back surface of the = grease layer together with the uneven pattern for diffusion. For example, when the light guide body is formed by repeated molding or injection molding, the following method can be applied, that is, as a metal mold = on the side adjacent to the exit surface (surface) side of the transparent wax layer A light wavy concave-convex pattern is formed, and a fine wavy concave-convex pattern is formed on a surface adjacent to the incident surface I26510.doc -74·200912388 (back surface) side of the transparent resin layer. Further, the fine wavy irregularities may be formed separately on the back surface of the transparent resin layer unlike the uneven pattern for light diffusion. For example, a film on which a fine wavy concave-convex pattern is formed may be attached to the back side of the transparent resin layer via an adhesive.广 In order to further improve the anisotropy of light diffusion, a film containing fine bubbles may be attached to the incident surface side or the exit surface side. As shown in FIG. 2A, when the film 317 containing fine bubbles is attached to the human face side, in order to effectively utilize the light from the light source 330, it is preferable that the light source is irradiated with a strong light. The content of the fine bubbles in 317a is large, and the content of the fine bubbles in the other portion 317b is small or not. The diffusing light guiding body of the present invention may also have a wedge shape in which the thickness is gradually thinned from one end toward the other end. In the wedge-shaped diffused light guide, a light source is disposed on a thick side. In the diffusion light guiding system of the present invention, it is necessary to form a meandering corrugated pattern on one surface, but it is not limited to those in which a concave-convex pattern is formed only on one surface. That is, a meandering wave-like concave-convex pattern may be formed on the other surface of the transparent resin layer. 7. Backlight unit 7 - 1 1. First Embodiment Hereinafter, a first embodiment of a backlight unit of the present invention will be described. Fig. 21 shows a backlight unit of this embodiment. The backlight unit 100 of the present embodiment is a so-called direct type backlight unit including a diffusion light guide 310 and a reflection plate 320 which is formed with a surface of the diffusion light guide 310 having a concave-convex pattern 126510.doc -75 - 200912388 ( The surface on the opposite side of the surface 315) (back surface 316) is disposed opposite to each other; and a plurality of light sources 330, 330, ... are disposed between the diffusion light guide 31 and the reflection plate 320. Further, on the surface 315 side of the diffused light guiding member 31, a diffusion film 340, a ruthenium sheet 35, and a brightness rising film 36 are laminated in this order. Examples of the light source 330 include a cold cathode tube, a light emitting diode, and the like. The reflector 320 may be, for example, a metal plate having a mirror surface or a laminate having such a metal plate. The diffusing film 340 may, for example, be a resin film containing transparent particles. The diffusion film 340 is such that the light emitted from the diffusion light guide is further diffused. For example, a resin sheet having a large number of conical or pyramidal projections on one surface (for example, trade name Vikuiti BEF III manufactured by Sumit〇m〇 3M Limited) or the like can be cited. The cymbal 35 is used to make the direction of travel of the light emitted from the diffusion film 340 consistent with the direction perpendicular to the surface. Examples of the brightness-increasing film 360 include a sheet in which only a main wave (p-wave) of light is passed through and a human-wave (S-wave) is reflected (for example, trade name Vikuiti DBEF-D400 manufactured by sumit〇m〇3M Limited). . 7 - 2 - 2 embodiment The following describes a second embodiment of the backlight unit of the present invention. Fig. 22 shows a backlight unit of this embodiment. The backlight unit 200 of the present embodiment is a so-called end face illumination type backlight unit, and includes a diffusion light guide 310 and a reflection plate 320 opposite to the surface (surface 315) on which the uneven pattern is formed on the diffusion light guide 31? The face (back face 316) is disposed opposite to each other; and 126510.doc -76-200912388 a plurality of light sources 330 are disposed on one side of the diffused light guide 31'. Further, on the surface 315 side of the diffusion light guide 310, a diffusion film 340, a ruthenium sheet 350, and a brightness rising film 360 are laminated in this order. The diffusing light guide 310, the reflecting plate 32, the light source 330, the diffusion film 340, the cymbal 350, and the brightness rising film 36 used in the present embodiment are the same as those in the first embodiment. In the backlight unit 100 of the above-described embodiment including the diffusing light guide 31A having the meandering wave-like concave-convex pattern, the light emitted from the light source 33 has a high anisotropy on the uneven surface of the diffused light guide 310. And spread. Therefore, in a liquid crystal display device having backlights of 100 and 200, it is difficult to produce image unevenness. 8. Antireflection body The antireflection system of the present invention includes the above-described uneven pattern forming sheet 1 which is a concave-convex pattern 12 having a maximum pitch A of 1 μm or less. In the antireflection body of the present invention, other layers may be provided on one or both sides of the uneven pattern forming sheet 1'. For example, in the surface of the concave-convex pattern forming sheet 1 on which one side of the uneven pattern 12a is formed, in order to prevent contamination of the surface, the thickness of the fluororesin or the polyoxynoxy resin as a main component may be id nm or so. Stained layer. In the antireflection body of the present invention, the refractive index of the concave-convex pattern forming sheet 1 is between the refractive index of the concave-convex pattern forming sheet 10 and the refractive index of the concave-convex pattern forming sheet 10 (the refractive index of the substrate 11). The intermediate refractive index, which varies continuously. Further, the most frequent pitch 8 of the concave-convex pattern 12a is 1 μm or less, and the average depth B of the bottom portion 12b of the concave-convex pattern 12a is 126%. Above, low, and squatting, the reflectance of light can be extremely low and the reflectivity is large. ^.+. ^ 〇八致0/〇. The reason is that the pattern of the bump pattern is formed. The unevenness of the slice 10 is the highest I-frequency spacing of the 12th I system. When the ratio is 1 μιη or less, the average

^ % 1ΠΠΟ/0* The most frequent spacing A of the horse is (10) or more. Therefore, the portion in which the intermediate refractive index continuously changes becomes longer in the thickness direction, so that the effect of suppressing light reflection can be remarkably exhibited. The antireflection body can be mounted, for example, on an image display device such as a liquid crystal display panel or a plasma display, a light emitting portion tip of a light emitting diode, and a surface of a solar battery panel. When the above-mentioned antireflection body is attached to the image display device, it is possible to prevent the illumination light from being reflected, so that the visibility of the image can be improved. When the above-mentioned anti-reflection body is attached to the top end of the light-emitting portion of the light-emitting diode, the light extraction efficiency can be improved. When the antireflection body is mounted on the surface of the solar cell panel, the amount of light extraction can be increased, so that the power generation efficiency of the solar cell can be improved. 相位9. Phase difference plate The phase difference plate of the present invention has the above-mentioned concave-convex pattern formation. In the case of the sheet, the concave pattern is the concave-convex pattern i2a having the most frequent spacing A of 1 μm or less. Among them, the direction of the unevenness is not random, but is along one direction. In the phase difference plate of the present invention, similarly to the above-described antireflection film, other layers may be provided on one surface or both surfaces of the concave-convex pattern forming sheet 10. For example, a concave-convex pattern 12a may be formed on the concave-convex pattern forming sheet 10. One side of the side has a sweat-proof layer. 126510.doc -78 · 200912388 The phase difference plate of the present invention can significantly exert the effect of generating a phase difference. The reason is that, as described above, when the most frequent pitch A of the concave-convex pattern 12a of the concave-convex pattern forming sheet 1 is short, when the width is i μm or less, the average depth B is deep, and the maximum frequency spacing Α is set to 1〇〇. When the % of the air is 10% or more, the portions of the air having different refractive indices and the concave-convex pattern forming alternately in the month 10 become longer in the thickness direction, and the portion exhibiting optical anisotropy becomes longer. Further, when the distance between the concave-convex patterns is equal to or lower than the wavelength of visible light or the wavelength of visible light, the same phase difference can be generated over a wide range of visible light wavelengths. (Engineering sheet for optical element manufacturing) The optical sheet for manufacturing an optical element of the present invention (hereinafter, simply referred to as an engineering sheet) includes the uneven pattern forming sheet 10, and the uneven pattern, that is, the groove having the most frequent pitch A of 1 μm or less In the pattern 12a, the engineering sheet for optical element manufacturing of the present invention is used as a mold for transferring a concave-convex pattern 12a to another material by a method as described below, and manufacturing a concave-convex pattern forming sheet in a large area and in a large amount. The concave-convex pattern forming sheet has a concave-convex pattern having the same frequency-to-average pitch and average depth as the engineering sheet, and can be used as an optical element such as an antireflection body or a phase difference plate. The specific method of manufacturing an optical component using an engineering sheet is the same as that of the above optical sheet. [Example 1] The Young's modulus in the following examples was measured using a tensile tester (τε·7〇οι) manufactured by Dingester Industries Co., Ltd. and measured according to jIS K. When the temperature is not specifically described, it is a value at 23 °C. 126510.doc -79- 200912388 (Example 1) A heat shrinkable film made of polyethylene terephthalate having a thickness of 5 〇 μιη in a uniaxial direction and a Young's modulus of 3 GPa (Mitsubishi Resin Co., Ltd.) HISHIPET LX-60S, manufactured by the company, has a glass transition temperature of 70. 〇), coated with polymethyl methacrylate diluted in toluene by a bar coater (P4831-made by POLYMER SOURCE Co., Ltd.) MMA, the glass transition temperature is 1 〇〇. 〇 'make it to a thickness of 200 nm to form a hard layer to obtain a laminate. Then, at 80. (: the laminate is heated for 丄 minute, thereby causing its heat shrinkage to 40% of the length before heating (that is, deformed by a deformation rate of 6〇%) to obtain a concave-convex pattern forming sheet (light diffusing body) having a corrugated concave-convex pattern of a hard layer, the corrugated concave-convex pattern along The direction perpendicular to the direction of shrinkage has a period. Further, the heat shrinkable film made of polyethylene terephthalate and the polymethyl methacrylate are 80. The Young's modulus is 5〇Mpa, 1 GPa. (Example 2) Dilution in toluene A embossed pattern-forming sheet (light diffuser) was obtained in the same manner as in Example 1 except that styrene (p. LYMER s〇 URCE Co., Ltd., PS, glass transition temperature: 10 (rc). The heat shrinkable film made of polyethylene terephthalate and the Young's modulus of the polystyrene at 80 ° C were 50 MPa and 1 GPa, respectively. (Example 3) Coating of polystyrene A concave-convex pattern forming sheet (light diffusing body) was obtained in the same manner as in Example 2 of the implementation of 126510.doc 200912388. (Example 4) The laminated sheet was heated at 70 C for 丨, Then, the heat-shrinkage was heated to 90% of the length (i.e., 'deformed by a deformation ratio of 丨〇%), and a concave-convex pattern-forming sheet was obtained in the same manner as in Example 2 ( (Embodiment 5) The concavo-convex pattern forming sheet (light diffusing body) obtained in Example 1 was used as an original sheet of an engineering sheet, and a light diffusing body was obtained in the following manner. The surface of the original sheet obtained in Example 1 on which the concave-convex pattern is formed is coated An uncured ultraviolet curable resin composition comprising an epoxy acrylate prepolymer, a 2-ethylhexyl acrylate and a benzophenone photopolymerization initiator. Further, an uncured ultraviolet curable resin composition On the surface of the coating film which is not in contact with the original sheet of the engineering sheet, the triethylene glycol film having a thickness of 5 μm is overlapped and pressed. Next, ultraviolet rays are irradiated from the top of the triethylene cellulose film to make the film harden. 1 The external curable resin composition is hardened, and the cured product is peeled off from the original sheet of the engineering sheet to thereby obtain a light diffuser. (Example 6) The uneven pattern forming sheet (light diffusing body) obtained in Example 1 was used as a work sheet original, and an optical element was obtained as follows. That is, the surface on which the concave-convex pattern is formed on the original sheet of the original sheet obtained by the embodiment is subjected to nickel plating treatment, and then the nickel plating is peeled off, thereby obtaining 126510.doc •81 - 200912388 having a thickness of 200 μm Secondary engineering film. Applying an epoxy acrylate-based prepolymer, a 2-ethylhexyl acrylate-based, and a benzophenone-based photopolymerization initiator to the surface on which the uneven pattern is formed on the secondary work piece A cured ultraviolet curable resin composition. Then, on the surface of the coating film of the uncured ultraviolet curable resin composition which was not in contact with the secondary work piece, a film of a film of 5 μ μm thick was laminated and pressed. Thereafter, ultraviolet rays are irradiated from the upper surface of the bismuth cellulose film to harden the unhardened ultraviolet curable resin composition, and the cured product is peeled off from the secondary work piece to obtain a light diffuser. (Example 7) The same procedure as in Example 6 was carried out except that the thermosetting epoxy resin was used instead of the ultraviolet curable resin composition, and the thermosetting resin was cured by heating instead of ultraviolet irradiation. Light diffuser. (Example 8) In the same manner as in Example 6, a secondary work piece having a thickness of 2 μm was obtained. On the surface on which the concavo-convex pattern was formed on the secondary work piece, a film of 1 methacrylic acid methyl S having a thickness of 5 μm was superposed and heated. The polymethyl methacrylate film which was softened by heating and the secondary work piece were pressed from both sides, and then cooled and solidified&apos; and peeled off from the secondary work piece, whereby a light diffuser was obtained. (Comparative Example 1) A concavo-convex pattern forming sheet (light diffusing body) was obtained in the same manner as in Example 2 except that the coating thickness of the ethyl acetate was changed to 6 μm. 126510.doc -82-200912388 (Comparative Example 2) A concavo-convex pattern forming sheet (light diffusing body) was obtained in the same manner as in Example 2 except that the coating thickness of the polystyrene was changed to 4 Å. ', (Comparative Example 3) HISHIPET LX-10S (3 mils of Young's mold) manufactured by Mitsubishi Plastics Co., Ltd. was used to replace msHipET ^ 60S manufactured by Mitsubishi Plastics Co., Ltd., and the laminated sheet was heated at 70 Torr for 丨 minutes. The heat-shrinkage was 97% of the length before heating (that is, it was deformed by a deformation ratio of 3%), and a concave-convex pattern-forming sheet (light diffusion) was obtained in the same manner as in Example 除. body). (Comparative Example 4) A concave-convex pattern-forming sheet was obtained by the method for producing an anisotropic diffusion pattern disclosed in Patent Document 2. That is, the following two plates are provided: a shielding plate having a diffusion plate such as frosted glass for diffusing and transmitting laser light and having a slit having a width of 1 mm and a length of 1 〇cm, and a commercially available coating having a thickness of 100 μτη The photosensitive film sheet of the photosensitive resin 'saves the two sheets at a distance of 1 m' and makes the two sheets parallel to each other. Then, after the argon laser having a wavelength of 5 14 nm is irradiated from the side of the shielding plate, the argon laser light diffused through the slit through the frosted glass exposes the photosensitive resin on the photosensitive film. The exposure as described above is repeated to expose the photosensitive resin on the entire surface of the photosensitive film sheet. Further, 'the photosensitive photosensitive film to be exposed is developed' to obtain a concave-convex pattern forming sheet (light diffusing body). Furthermore, the grayscale document conversion image of Comparative Example 4 is displayed in FIG. 9, and the image of the 126510.doc-83 - 200912388 grayscale text image is displayed in FIG. . \'From the center of the image of Fig. 10 along the k solid i 亮度 brightness trace ^ 彳 ^ line L4, (four) (four) on the help line of the second diagram is shown in Figure (1) and then, in Figure i. The middle 1 auxiliary '5 /, the part of the value Y is orthogonal to the auxiliary line l4, and T l···························· (Comparative Example 5) Attempts to use a film having a thickness of 5 〇 针 针 舻 杨 杨 杨 杨 杨 为 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 In the same manner as in the first embodiment, the uneven pattern forming sheet (light diffusing body) was not formed, but the uneven pattern forming sheet (light diffusing body) was not obtained. (Comparative Example 6) A heat shrinkable shrink film made of polyethylene terephthalate having a thickness of 50 _ and a Young's modulus of 3 (10) in a uniaxial direction (HISH bribe LX_1〇s manufactured by Mitsubishi Plastics Co., Ltd.) , glass transfer temperature is 7 〇 on one side, by the bar coating method to coat the polydimethyl methoxy hydride with a Young's modulus of 2 Μρ &amp; (Shin-Etsu Chemical Co., Ltd. ks847t, glass transition temperature The dispersion obtained by diluting in toluene with -1201) and a retort medium (Shin-Etsu Chemical Co., Ltd. CAT-PL_5GT) was made into an eagle nm to form a hard layer to obtain a laminated sheet. Secondly, at 100 t The laminated sheet was heated for 1 minute to be heat-shrinked, whereby a concave-convex pattern forming sheet was obtained, but the hard layer could not be deformed by folding. Therefore, the corrugated concave-convex pattern was not formed. By atomic force microscope (Nan〇Sc〇pe, manufactured by veeco Co., Ltd.) '126510.doc • 84- 200912388 The surfaces of Examples 1 to 8 and Comparative Examples 1 to 6 were imaged. Example of the light-diffusing body of the concave-convex pattern forming sheet 1~8 and comparative examples m&amp; The concave-convex pattern forming sheet of Example 4 was used to measure the depth of the 凹凸 如 如 n n n n n n 如 如 如 如 如 如 如 如 , , 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如The degree of alignment of the concavo-convex pattern is obtained as follows. First, the surface of the concavo-convex pattern is photographed by a surface optical microscope, and the image is converted into a grayscale document (see Fig. 3). The image is subjected to Fourier transform. Fig. 4 shows an image after Fourier transform, and the person guides the auxiliary line L2 in the horizontal direction from the center of the image of Fig. 4, and draws the brightness on the auxiliary line (see Fig. 5). Thereafter, in FIG. 5, the auxiliary line L3' is orthogonal to the auxiliary line ^ in the portion of the value X (reciprocal of the most frequent pitch) and the luminance on the auxiliary line L3 is drawn (refer to FIG. 6). The degree of alignment of the concavo-convex pattern is obtained from the half-value width w of the peak in the drawing of Fig. 6. The equivalent value is shown in Table 1. Further, according to the most frequent pitch of the concave-convex pattern and the average depth of the bottom, the following Benchmarking 6 parity as the adaptability of light diffusers The evaluation results are shown in Table 1. 〇: The most frequent pitch of the concave-convex pattern exceeds i μη1 and is 20 μm or less, and the average depth is 10% or more when the maximum frequency spacing is 100%, and the alignment degree is 〇·3. ~1.0, suitable as a light diffuser. △. The most frequent pitch of the concave-convex pattern is below or more than 2〇μιη, or the average depth is less than 1〇% when the most frequent spacing is set to 100%, or the alignment is less than 0 _ 3 It may not be suitable as a light diffuser. 126510.doc •85· 200912388 χ: A concave-convex pattern cannot be formed. [Table 1]

Average pitch of the concavo-convex pattern (μιη) Average depth of the concavo-convex pattern (μιη) Depth/pitch (%) Orientation evaluation Example 1 2 2 100 0.3 〇Example 2 2 2 100 0.3 〇Example 3 10 10 100 0.3 〇Implementation Example 4 2 0.4 20 0.3 〇 Example 5 2 2 100 0.3 〇 Example 6 2 2 100 0.3 〇 Example 7 2 2 100 0.3 〇 Example 8 2 2 100 0.3 〇 Comparative Example 1 60 60 100 0.3 Δ - Comparative Example 2 0.4 0.4 100 0.3 Δ Comparative Example 3 Γ 2 0.18 9 0.3 Δ Comparative Example 4 5 6 120 0.16 Δ Comparative Example 5 No uneven pattern X was formed. Comparative Example 6 The uneven pattern X was not formed to smooth the surface of the laminated sheet to be folded. In Examples 1 to 8 which were modified in the same manner, the uneven pattern forming sheet can be easily produced. Further, in the concave-convex pattern forming sheet-like concave-convex patterns of Examples 1 to 8, the most frequent pitch is more than 1 μm and is 20 μm or less, and the average depth of the bottom is i 0% or more when the above-mentioned worst-frequency pitch is 1%%. Therefore, it is suitable as a light diffuser. In Examples 1 to 4, the above-mentioned maximum frequency spacing and average depth were obtained because the thickness of the surface smooth hard layer exceeded 〇.〇5 μηη and was 5 μηη or less and the deformation ratio was 丨〇%. the above. Moreover, according to the manufacturing method of Examples 5 to 8 in which the uneven pattern forming sheet (light diffusing body) obtained in the Example is used as a work sheet, it is possible to easily produce a sheet (light diffusing body) having a pattern formed with the uneven pattern. A light diffuser having a concave-convex pattern having the same frequency spacing and average depth. On the other hand, in Comparative Example 1A2, since the thickness of the surface hard smooth layer is 126510.doc -86 - 200912388 degrees is 0.05 μηι or less or exceeds 5 μm, the obtained concave-convex pattern forming sheet (light diffuser) The most frequent pitch of the concave-convex pattern is 1 μm or less or more than 20 μm. Further, in Comparative Example 3, since the deformation ratio is 3%, the average depth of the bottom of the concave-convex pattern of the obtained concave-convex pattern forming sheet is insufficient. The frequency spacing η is again 100 /. % of time. Further, in Comparative Example 4, the degree of alignment was less than 0.3. These Comparative Examples 1 to 4 are not necessarily suitable as a light diffuser. Further, in Comparative Example 5 in which a biaxially stretched polyethylene terephthalate film was used as a resin layer, and a production method in Comparative Example 6 in which a laminated sheet having a glass transition temperature lower than that of the first resin using the second resin was used In the case, since the smooth surface of the hard layer cannot be deformed by folding, the concave-convex pattern is not formed. The Young's modulus in the following examples is a tensile tester (TENSILON RTC-1210 manufactured by Orientec Co., Ltd.), and the temperature is measured according to JIS Z 2280-1993 "High Temperature Young's Modulus Test Method for Metallic Materials". Changed to 23 ° C and measured. The same applies to the case where the hard layer is composed of a metal compound. (Example 9) A heat-shrinkable film made of polyethylene terephthalate having a thickness of 50 μm in a uniaxial direction and a Young's modulus of 3 GPa (HISHIPET LX-10S manufactured by Mitsubishi Plastics Co., Ltd.) On one side, aluminum having a Young's modulus of 70 GPa was vacuum-deposited to have a thickness of 〇.〇5 μηι to form a smooth hard surface layer to obtain a laminated sheet. Next, the laminated sheet is heated at 10 °C for 1 minute to heat shrink it to 4% by weight of the length before heating (that is, 'make it change at a deformation rate of 60% 126510.doc • 87- 200912388]) to obtain a concave-convex pattern forming sheet having a corrugated concave-convex pattern having a corrugated concave-convex pattern having a period 0 in a direction orthogonal to the contraction direction, as follows, and using the concave-convex pattern forming sheet as an engineering A light diffuser is obtained in the form of a sheet original, that is, an epoxy acrylate-based prepolymer, 2-ethylhexyl acrylate and dibenzophenone are coated on the surface of the original sheet on which the concave-convex pattern is formed. An uncured ultraviolet curable resin composition of a photopolymerization initiator. Thereafter, the coating film of the uncured ultraviolet curable resin composition is not in contact with the original sheet of the μηι-triethylene fiber engineering sheet. And superimposing and pressing the film of the thickness of the bismuth film. Then, ultraviolet rays are irradiated from the upper surface of the second cellulose film to harden the uncured ultraviolet curable resin, and the cured product is obtained by peeling off the cured product from the original sheet of the engineering sheet. (Embodiment 10) The concave-convex pattern forming sheet obtained by the method of Example 9 was used as an original of an engineering sheet, and a light diffusing body was obtained in the following manner. That is, by the embodiment 9 The surface of the obtained original sheet of the obtained engineering sheet is subjected to nickel plating treatment, and then the nickel plating is peeled off, thereby obtaining a secondary engineering sheet having a thickness of 200 μm. The secondary engineering sheet is formed with a concave-convex pattern. The surface is coated with an uncured ultraviolet curable resin composition comprising a propylene glycol acrylate (tetra) acrylate, a propyl benzoate-2-ethyl group, and a diphenyl (tetra) photopolymerization initiator. The unhardened ultraviolet curable resin composition is coated on the surface which is not in contact with the secondary work piece of 126510.doc 88 - 200912388, and the thickness of the triacetone cellulose film of 50 is superimposed and pressed, and then, from the third The ultraviolet ray is irradiated on the ruthenium cellulose film to harden the uncured curable resin, and the cured product is peeled off from the secondary work piece, thereby obtaining a light diffuser. (Example 11) A thermosetting epoxy resin is used instead. UV hardening The light diffuser was obtained in the same manner as in Example 1 except that the thermosetting epoxy resin was cured by heating to replace the ultraviolet irradiation. (Example 12) In the same manner, a secondary work piece having a thickness of 20 μm was obtained. On the surface of the secondary work piece on which the concave-convex pattern was formed, a polymethyl methacrylate film having a thickness of 50 μm was superposed and heated. The softened polymethyl methacrylate film and the secondary engineering sheet are pressed from both sides thereof, and then cooled and solidified, and the cured polymethyl methacrylate film is peeled off from the secondary engineering sheet. This obtained a light-diffusing body. (Comparative Example 7) A light diffuser was obtained in the same manner as in Example 9 except that the thickness was changed to the same. (Comparative Example 8) A light diffuser was obtained in the same manner as in Example 9 except that aluminum was vacuum-deposited to have a thickness of 〇 〇丨μηι. (Comparative Example 9) 1265l〇.d〇c -89- 200912388 A heat-shrinkable film (Mitsubishi) made of polyethylene terephthalate having a thickness of 5 G μηι in a uniaxial direction and a thickness of 3 (10) in Young's modulus On the surface of HISHIPET LX-10S, the resin is limited, the Young's modulus of vacuum distillation is GPa, and its thickness is 〇_〇5 μηι to form a smooth hard layer to obtain a laminate. Then, the laminated sheet was heated at 70 C for 1 minute to shrink to 97% of the length of the heated crucible (that is, deformed by a deformation ratio of 3%), and in addition, 9 A light diffuser is obtained in the same manner. The upper surface of the light-diffusing body of the concave-convex pattern-forming sheets of Examples 9 to 12 and Comparative Examples 7 to 9 was imaged by an atomic force microscope (Nan〇Sc〇pe (1) manufactured by Philippine Veec Co., Ltd.). With respect to the concavo-convex pattern forming sheets of Examples 9 to 12 and Comparative Examples 7 to 9, the depth of the concavo-convex pattern at 1 〇 was measured in an image of an atomic force microscope, and the depths were averaged to obtain an average depth. Further, the degree of alignment of the concavo-convex pattern was determined in the following manner. First, the surface of the concave-convex pattern is photographed by a surface optical microscope, and the image is converted into a grayscale document (refer to Fig. 3). Then, Fourier transform is performed on the image of the grayscale document. Figure 4 shows the image after Fourier transform. The person guides the auxiliary line in the horizontal direction from the center of the image of Fig. 4, and draws the brightness on the auxiliary line (refer to Fig. 5). Thereafter, in Fig. 5, the auxiliary line L3' is drawn in the portion of the value χ (the reciprocal of the most frequent pitch) and the auxiliary line q is the parent's and the luminance on the auxiliary line L3 is drawn (see Fig. 6). Further, the degree of alignment of the uneven pattern is obtained from the half value width W1 of the peak in the drawing of Fig. 6. 126510.doc 90· 200912388 The equivalent values are shown in Table 2. Further, the adaptability of the light diffuser was evaluated based on the following pitch based on the most frequent pitch of the concave-convex pattern and the average depth of the bottom. The evaluation result is shown in Table 2 ° The 最·bump pattern has a most frequent pitch of more than 1 μηη and is 20 μπι or less, and the average depth is 10% or more when the most frequent pitch is 100%, and the alignment degree is 〇·3~ 1. 〇, suitable as a light diffuser. △• The most frequent spacing of the embossed pattern is Ιμιη or less, or the average depth is less than 丨〇% when the MF spacing is set to 1 〇〇%, or the alignment is less than 0.3, which is not necessarily suitable as a light diffuser. Unable to form a bump pattern

In the embodiment in which the concave-convex pattern forming sheet is used as the original sheet of the engineering sheet, the light diffusing body having the concave-convex pattern can be easily produced. In particular, in the light diffusing bodies obtained in Examples 9 to 12, the most frequent pitch of the concave-convex pattern exceeds ... and is 2 Å or less, and the average depth of the bottom is set to 100/. When it is 1 G% or more, it is suitable as a light diffuser. In the embodiment, the reason why the maximum _ distance and the average depth as described above is obtained is 126510.doc -91 · 200912388. The thickness of the surface smooth hard layer exceeds 0.01 pm and is less than 0.2 μηη, and the deformation ratio is More than 10%. On the other hand, in Comparative Examples 7 and 8, since the thickness of the surface hard smoothing layer was 0.01 μm or less or more than 〇 2 μm, the maximum pitch of the obtained concavo-convex pattern was ... or less. Further, in the case of J 9 , since the deformation ratio is set to 3%, the average depth of the bottom portion of the concave-convex pattern of the obtained light-diffusing body is less than 10% when the maximum-frequency pitch is 100%. Further, in Comparative Example 10, the degree of alignment was less than 〇3. These comparative examples are not necessarily suitable as light diffusers. (Example 13) The heat shrinkable film in the uniaxial direction was 50 μη1, and the Young's modulus was 3 polyethylene terephthalate. The heat shrinkable film (HISHIPET LX-60S, glass manufactured by Mitsubishi Plastics Co., Ltd., glass) The transfer temperature is one of 7 (rc)! Polystyrene (POLYME SOURCE Co., Ltd.) diluted in toluene by a gravure printing machine (K printh ΡΓ〇&lt;^Γ) manufactured by Matsuo Co., Ltd. For PS, the glass transition temperature is (10). C(1) has a diameter of 50 and a thickness of dots to obtain a printed sheet. The pattern of dots is a gray scale pattern as described below, that is, a width of 5 (10) is called 1 〇 (10). Within the range from the end of the length direction to the other end, the point a product ratio is increased by 10% β per 1 cm in the range of 0 to 1%, and the point ratio of 0% means that it is completely unprinted. 1% indicates full printing. Then, the printed sheet is heated for 1 minute, thereby shrinking the pot to 40% of the length before heating (that is, deforming it by a deformation rate of 6〇%) At 8rc, the Young's modulus of polystyrene is higher than that of poly(four) 126510.doc -92- 200912388 '1 carboxylic acid ethyl vinegar The twisted modulus of the film of the shrinking film is 50 MPa. Therefore, when it is shrinking, the point is folded by the square ten, and the shape is deformed to form the entanglement and shrinkage. The direction in which the directions are orthogonal to each other and the a heart is in the direction of the mouth, and has a periodic wavy concave-convex pattern. Thus, the concave-convex pattern formed on the flat surface of the flat surface is formed with a concave-convex pattern to form h 0 3 The maximum pitch of the concave-convex pattern of the concave-convex pattern forming sheet is 5 μηι, the aspect ratio is !, and the alignment degree is 〇.3. After checking the obtained light-diffusing property of the concave-convex pattern forming sheet, the phase is known. In the direction perpendicular to the contraction direction, the direction of the direction parallel to the contraction direction is stronger and the diffuse diffusion of the light is more strongly diffused. Further, the light diffusibility gradually increases along the direction in which the area ratio of the uneven region becomes larger. The concave-convex pattern forming sheet of such an embodiment can be used as a light diffusing sheet. (Example 14) Polyphenylene terephthalate having a thickness of 25 in a biaxial direction and a Young's modulus of 3 GPa Formic acid ethyl ethane g-shrink film (Mitsubishi resin shares A embossed pattern-forming sheet was obtained in the same manner as in Example 13 except that HISHIPET PX_4GS was manufactured by the company, and HISHIPET LX-60S was manufactured in the same manner as in Example 13. There is a corrugated concavo-convex pattern that does not follow a specific direction. The concavo-convex pattern of the concavo-convex pattern forming sheet has a most frequent pitch of 5 μm and an aspect ratio of 1. After examining the optical characteristics of the concavo-convex pattern forming sheet of Example 14 It is known that it has an isotropic light diffusibility. Therefore, the uneven pattern forming sheet of Example 14 can be used as a light diffusing sheet. I26510.doc •93- 200912388 (Embodiment 15) The printing point is printed by an inkjet printer (FUJI FILM Co., Ltd. Dimatix Μ ΡΓ ΡΓ ΐ Γ〇ΜΡ 831 831 831 831), except for the same as in the thirteenth embodiment. The obtained concave-convex pattern forming sheet was obtained. The concave-convex pattern of the uneven pattern of the concave-convex pattern forming sheet has a most frequent pitch of 5 μΐη and an aspect ratio of 1 ′ of an orientation of 0.3. The optical characteristics of the obtained concavo-convex pattern forming sheet were examined, and it was found to have the same anisotropic diffusing property as in Example 13. Therefore, the uneven pattern forming sheet of Example 15 can be used as a light diffusing sheet. (Example 16) A concavo-convex pattern-forming sheet obtained by the method of Example 13 was used as a sheet original, and a light-diffusing sheet was obtained in the following manner. That is, the surface on which the uneven pattern was formed on the original sheet of the engineering sheet obtained in Example 13 was coated with an epoxy acrylate-based prepolymer, propylene ethylhexyl ester, and benzophenone-based photopolymerization. An uncured ultraviolet curable resin composition of a starting agent. Then, on the surface of the coating film of the uncured ultraviolet curable resin composition which is not in contact with the original sheet of the engineering sheet, a film of a thickness of 5 Å μηη is laminated and pressed. Next, ultraviolet rays are irradiated from the top of the triacetone cellulose film to harden the unhardened ultraviolet curable resin, and the hardened article is peeled off from the original sheet of the engineering sheet to thereby obtain a light-diffusing sheet. The obtained light-diffusing sheet had the same concave-convex regions as those of the light-diffusing sheet of Example 13, and had the same light diffusibility. 126510.doc • 94- 200912388 (Embodiment 17) A concavo-convex pattern forming sheet obtained by the method of Example 13 was used as the original sheet of the work piece, and (4) pieces were obtained in the following manner. Namely, a nickel plating treatment was performed on the surface on which the concave-convex pattern of the original sheet obtained in Example 13 was formed, and then the nickel plating was peeled off, whereby a thickness of 2 G0 μπ^_ engineering sheets was obtained. Applying an uncured ultraviolet curable property containing an epoxy acrylate prepolymer, ethyl hexyl acrylate, and a diphenyl-based photopolymerization initiator to the surface on which the uneven pattern is formed on the secondary work piece Resin composition. Then, on the surface of the coating film of the uncured ultraviolet curable resin composition which was not in contact with the secondary engineering sheet, a film of triethylene fluorene cellulose having a thickness of 5 pm was superposed and pressed. Then, ultraviolet rays were irradiated from the upper surface of the triacetone cellulose film to harden the hardened curable resin, and the cured product was peeled off from the secondary work piece, whereby a light-diffusing sheet was obtained. The obtained light-diffusing sheet had the same concave-convex regions as those of the light-diffusing sheet of Example 13, and had the same light diffusibility. (Example 18) The thermosetting epoxy resin was used in place of the ultraviolet curable resin composition ', and the thermosetting epoxy resin was cured by heating to replace the ultraviolet irradiation 'other than' in the same manner as in Example 丨7. The light diffusing sheet is obtained in the same manner. The obtained light-diffusing sheet had the same concave-convex regions as those of the light-diffusing sheet of Example 13, and had the same light diffusibility. 126510.doc • 95-200912388 (Embodiment 19) In the same manner as in Example 17, a secondary work piece having a thickness of 2 〇〇 μηΐ2 was obtained. On the surface of the secondary work piece on which the uneven pattern was formed, a 50 μm thick polymethyl methacrylate film was superposed and heated. The heated and softened polymethyl methacrylate film and the secondary engineering sheet are pressed from both sides, and then cooled and solidified, and the cured polymethyl methacrylate is peeled off from the secondary engineering sheet. A film is thereby obtained as a light diffusion sheet. The obtained light-diffusing sheet had the same concave-convex region as that of the light-diffusing sheet of Example 13, and had the same light diffusibility. (Example 20) The thickness of the heat shrinkage in the uniaxial direction was 5 G _ and the Young's modulus was a heat-shrinkable film made of polyethylene terephthalate (Mitsubishi Resin Co., Ltd.) , glass (4) temperature is one of the faces of the listener. A large number of dot-shaped openings (apertures of aperture 5. (4) are placed. Γ i The pattern of the opening of the grass is the gray pattern as described below, ie j5(10)X In the range of length 1G (10), the σ accumulation ratio is opened from the end of the length direction toward the other end. % means that the opening is not open, indicating that the t cover is placed on the surface of the heat shrinkable film. The modulus of the aluminum is 7〇GPa, and the pot is made to obtain the steamed ore. The thickness is 〇.〇5, which forms the inscription on the surface of the heat-shrinkable film. The pattern of the point is 126510.doc -96- 200912388 Cmx length 10 cm of the end of the end of the opening area ratio % ° Again, the point area ratio is the gray pattern as described below, that is: within the width of 5, from one end of its length to the other" 0~ 1% increase per 1 cm in the range of 100%. 0% means no evaporation at all, 100% means full steaming Then, the steamed sheet is heated for 1 minute at the time of loot, whereby it is heat-shrinked to 40% of the length before heating (that is, it is deformed by a deformation rate of 60%). During heat shrinking, the manner of folding The deformation forms a corrugated pattern having a period along a direction orthogonal to the contraction direction. Thereby, a concave-convex pattern forming sheet having irregularities formed on one surface is obtained. The concave-convex pattern forms a concave-convex pattern of the uneven portion of the sheet. The most frequent spacing is 3 μιη 'the aspect ratio is 1, and the alignment degree is 〇.3. Then, the obtained concave-convex pattern forming sheet is used as the original of the engineering sheet, and the light-diffusing sheet is obtained as follows. The surface of the original sheet on which the concave-convex pattern is formed on the surface of the original sheet, and the coating includes

The vitamin film is pressed and pressed.

Thereby, a light diffusing sheet is obtained.

Example 13 has the same anisotropic diffusivity. 126510.doc -97- 200912388 (Example 21) Polyethylene terephthalate shrink film using a heat shrinkage in the biaxial direction of 25 μηι and a Young's modulus of 3 GPa (Mitsubishi Resin Co., Ltd.) A embossed pattern-forming sheet was obtained in the same manner as in Example 2 except that HISHIPET PX_4 〇S) was used instead of HISHIPET LX-60S manufactured by Mitsubishi Plastics Co., Ltd. The concave-convex pattern of the uneven pattern of the concave-convex pattern forming sheet has a mode gap of 3 μm and an aspect ratio of 1. Then, using this concave-convex pattern to form a sheet, a light-diffusing sheet was obtained in the same manner as in Example 2A. The optical characteristics of the light-diffusing sheet of Example 2 were examined to have an isotropic light diffusibility. (Example 22) A concavo-convex pattern-forming sheet obtained by the method of Example 20 was used as a work piece original plate. A light-diffusing sheet was obtained in the following manner. Namely, the surface of the original sheet of the engineering sheet obtained in Example 20 on which the uneven pattern was formed was subjected to a nickel-nickel treatment, and thereafter the nickel was peeled off, whereby a secondary work piece having a thickness of 200 μm was obtained. Applying an uncured pattern comprising an epoxy acrylate prepolymer, an acrylic acid 2-ethylhexyl acrylate, and a benzophenone photopolymerization initiator to the surface on which the concave-convex pattern is formed on the secondary work piece An ultraviolet curable resin composition. Then, on the surface of the coating film of the uncured ultraviolet curable resin composition which is not in contact with the secondary work piece, a film of a thickness of 5 Å of triethylene fluorene is superposed and pressed. Then, ultraviolet rays are irradiated from the upper surface of the triacetone cellulose film to harden the hardened hardenable resin. The cured product is peeled off from the secondary work piece, and the light-diffusing sheet is obtained by 126510.doc • 98-200912388. The obtained light-diffusing sheet had the same concave-convex region as that of the light-diffusing sheet of Example 20 and had the same light diffusibility. (Example 23) The same procedure as in Example 22 was carried out except that the thermosetting epoxy resin was used instead of the ultraviolet curable resin composition, and the thermosetting epoxy resin was cured by heating instead of ultraviolet irradiation. Ways to obtain a light diffusing sheet. "The obtained light-diffusing sheet has the same unevenness as the light-diffusing sheet of Example 2 and has the same light diffusibility. (Example 24) In the same manner as in Example 22, a thickness of 2 获得 was obtained. a second engineering piece of μηι. The polymethyl methacrylate film having a thickness of 5 μm is superposed on the surface of the secondary engineering sheet having the concave-convex pattern, and is heated by pressing on both sides. After the softened polymethyl methacrylate film and the secondary red sheet are 'cooled', the cured polydecyl acrylate film is peeled off from the secondary work piece, thereby obtaining a light diffusing sheet. The light-diffusing sheet has the same unevenness region as the light-diffusing sheet of Example 2 and has the same light diffusibility. In the optical sheets of Examples 13 to 24 in which the uneven portions are mixed on one surface, by the concave &amp; Since the light-diffusing property is excellent in the unevenness of the area, the light diffusing property is excellent. Further, in the optical sheet, the uneven portion is disposed closer to the other end side in the longitudinal direction, so that the light diffusibility on the other end side in the longitudinal direction is higher. Young's modulus in the following examples of system using a tensile tester (D ^ "" Industrial Co., Ltd. ΤΕ-126510.doc -99- 200912388 7〇01), and the value of κ and 7113_1995 measured pursuant to JIS. When the temperature is not specifically described, it is a value at 23 〇c. * (Example 25) A polyethylene terephthalate shrink film having a thickness of 5 yoke and a Young's die 4 of 3 (10) in a uniaxial direction (HISHIPET LX-60S, manufactured by Mitsubishi Plastics Co., Ltd., glass) The transfer temperature is (1) on one side of the surface, and the polymethyl propylated acid is added to the toluene by a spin coating method (p4831-MMA manufactured by POLYMER SOURCE Co., Ltd., glass transition temperature is 100). 〇 'make it to a thickness of 12 nm to form a hard layer to obtain a laminate. Then add the layer to the laminate for a minute, thereby allowing the heat to shrink to 40% of the length before heating (ie, The deformation pattern is deformed by a deformation ratio of 6% to obtain a concave-convex pattern forming sheet having a corrugated concave-convex pattern in the hard layer, and the corrugated concave-convex pattern has a period in a direction orthogonal to the contraction direction. The Young's modulus of the shrink film of the phthalic acid and the polymethyl methacrylate at 5 ° C is 5 MPa and 1 GPa, respectively. (Example 26) Heat shrinkage in a uniaxial direction Polyethylene terephthalate with a thickness of 50 drops and a Young's modulus of 3 muscles (Mitsubishi Resin Co., Ltd. HISHIPET LX-61S, glass transition temperature of 7 (rc) - surface, coated with polyvinyl alcohol diluted in water (12 nm made by KURARay Co., Ltd. to form PVA105 'glass transition temperature 85 ° C), the thickness of the hard layer to obtain a laminated sheet. 126510.doc •100- 200912388 and then at 75 c, the laminated sheet is heated for 1 minute, thereby allowing it to heat ', :,,, ... month 50% of the length of b (that is, deformed by a deformation rate of 5%)" to obtain a concave-convex pattern forming sheet having a corrugated concave-convex pattern of the hard layer. The above-mentioned corrugated concave-convex pattern is orthogonal to the contraction direction The direction has a period. Further, the shrink film of polyethylene terephthalate and the Young's modulus of the polyethylene at 75 C are 5 〇Μρ &amp; 1, respectively. (Example 27) The thickness of the heat shrinkage in the axial direction is 5〇μηι, and the Young's modulus is 3 pairs of the polyethylene-ethylene formate shrink film (HISHIPET LX-61S manufactured by Mitsubishi Plastics Co., Ltd., the glass transition temperature is 7〇. Steaming and solidifying fluororesin (Tandk Co., Ltd. NAN〇s Β) was made to have a thickness of 12 μΐη to form a hard layer to obtain a laminated sheet. 'When the temperature was 7 5 C, the laminated sheet was heated for j minutes, thereby causing heat shrinkage to the length before heating. 50% (that is, deformed by a deformation rate of 5%) k to obtain a concave-convex pattern forming sheet having a corrugated concave-convex pattern in a hard layer, the corrugated concave-convex pattern having a direction orthogonal to the contraction direction (Example 28) A sheet having a thickness of 5 parts composed of polydimethyl siloxane having a Young's modulus of 2 MPa was stretched to twice the length by a stretching device, and in this state, It is solid. Next, in this state, on one side of the sheet, it was coated on toluene-diluted polymethyl methacrylate (P483 1-MMA manufactured by POLYMER SOURCE Co., Ltd., glass transition temperature was 100 〇, making it 126510 thick) .doc -101 · 200912388 is 12 nm to form a hard layer to obtain a laminate. Then 'stop stretching, return the laminate to the length before stretching, thereby making the hard layer 50% deformation rate The concave-convex pattern forming sheet having a corrugated concave-convex pattern having a hard layer is obtained by compression, and the corrugated concave-convex pattern has a period along a direction orthogonal to the contraction direction. (Example 29) The Young's modulus is 2 MPa. One side of a sheet of 5 mm thick consisting of polydimethyl siloxane, coated with polymethyl methacrylate diluted in toluene (P4831-MMA, manufactured by POLYMER SOURCE Co., Ltd., glass transition temperature of 1 〇 ( TC), having a thickness of 丨2 nm, to form a hard layer to obtain a laminated sheet. Then 'stretching the laminated sheet to a length of five times by a stretching device, thereby shrinking the length of the normal direction of the stretching direction 5〇% (that is, make it 5%) The deformation rate was deformed to obtain a concave-convex pattern forming sheet having a corrugated concave-convex pattern in the hard layer, and the corrugated concave-convex pattern had a period along the stretching direction. (Comparative Example 10) Coating was performed so as to have a thickness of 60 nm. A concave-convex pattern-forming sheet was obtained in the same manner as in Example 25 except that polymethyl methacrylate was used. (Comparative Example 11) An attempt was made to use a two-axis extended poly pair having a thickness of 5 G μm and a Young's modulus of 5 Ethylene phthalate bismuth phthalate (G2 manufactured by Teijin Co., Ltd.) was used to replace the shrink film &amp; otherwise, the embossed pattern engineering sheet was obtained in the same manner as in Example 25. However, no wavy shape was formed. The concave-convex pattern is not 126510.doc •102- 200912388 The sheet for concave-convex pattern engineering is obtained. (Comparative Example 12) The thickness of the heat-shrinkage in the uniaxial direction is 5〇μιη, and the Young's modulus is 3^b. Ethylene phthalate shrink film (HISHIPET LX-10S, manufactured by Mitsubishi Plastics Co., Ltd.), coated with polymethyl methacrylate diluted in toluene (p483i_ΜΜΑ, manufactured by POLYMER S0URCE Co., Ltd., glass transfer) The degree is 1 〇〇. 〇, the thickness is i2 to form a smooth hard layer on the surface to obtain a laminated sheet. Then, at 7 (TC), the laminated sheet is heated for a minute to shrink to 97 长度 before heating. The concave-convex pattern forming sheet was obtained in the same manner as in Example ^ except that the sheet for uneven patterning was obtained by deforming at a deformation ratio of 3%. (Comparative Example 13) The thickness of the heat shrinkage in the direction of the material is 5 〇 _, and the Young's modulus is 3 Å polyethylene terephthalate shrink film (m-ET LX_10S manufactured by Mitsubishi Plastics Co., Ltd.), and the glass transition temperature is 7 〇. (1) On one side, a polydimethyl sulphate of 2 muscles was applied by spin coating to the KS847T of Industrial Co., Ltd., and the transition temperature of the glass was _1) The retort medium (Shin-Etsu Chemical Co., Ltd. (1)) was diluted in toluene:::dispersion' to a thickness of 12 nm to form a hard layer to obtain a bar layer. Then, in the wartime, the laminated sheet was heated for 1 minute to be heat-shrinked, whereby the uneven pattern forming sheet was obtained. However, since the hard layer was not deformed by the meandering, the wavy concave-convex pattern was not formed. I26510.doc -103- 200912388 (Example 30) The concave-convex pattern forming sheet obtained by Example 25 was used as an engineering sheet, and an optical element was obtained in the following manner. That is, on the surface of the engineering sheet obtained in Example 25 on which the uneven pattern was formed, the epoxy acrylate-based prepolymer, the 2-ethylhexyl acrylate and the benzophenone-based light were applied. An uncured ultraviolet curable resin composition of a polymerization initiator. Then, on the surface of the coating film of the uncured ultraviolet curable resin composition which is not in contact with the engineering sheet, a film of a thickness of 50 μm of trimethine cellulose is superposed and pressed. Next, ultraviolet rays are irradiated from the upper surface of the triacetone cellulose film to harden the unhardened ultraviolet curable resin composition, and the cured product is peeled off from the engineering sheet, whereby an optical element is obtained. (Example 31) The uneven pattern forming sheet obtained in Example 25 was used as an engineering sheet, and an optical member was obtained in the following manner. Namely, a nickel plating treatment was performed on the surface on which the uneven pattern was formed on the engineering sheet obtained in Example 25, and thereafter the nickel plating was peeled off, whereby a nickel-plated sheet having a thickness of 2 μm was obtained. Applying an uncured ultraviolet light containing an epoxy acrylate-based prepolymer, an acrylic acid 2-ethylhexyl ester, and a dimerization-based photopolymerization initiator to the surface on which the uneven pattern is formed on the nickel-plated sheet A curable resin composition. Then, on the surface of the coating film of the uncured ultraviolet curable resin composition which is not in contact with the nickel-plated sheet, a thickness of 5 〇^(1) of triacetyl cellulose 1265 l〇, d〇c • 104· 200912388 The film overlaps and is pressed. Next, ultraviolet rays were irradiated from above the triacetyl cellulose film to harden the unhardened ultraviolet curable resin composition, and the cured product was peeled off from the nickel-plated sheet, whereby an optical element was obtained. (Example 32) The same procedure as in Example 31 was carried out except that the thermosetting epoxy resin was used instead of the ultraviolet curable resin composition ', and the thermosetting resin was cured by heating instead of ultraviolet irradiation'. Optical element. (Example 33) In the same manner as in Example 11, a nickel-plated sheet having a thickness of 200 μm was obtained. On the surface of the nickel-plated sheet on which the uneven pattern was formed, a film of a thickness of 5 μ μΐ 2 polymethyl methacrylate was superposed and heated. The polymethyl methacrylate film and the nickel-plated sheet which were softened by heating were pressed from the two sides, and then cooled and solidified, and peeled off from the nickel-plated sheet, whereby a concave-convex pattern-forming sheet was obtained. The upper surfaces of the optical elements of the concave-convex pattern forming sheets of Examples 25 to 33 and Comparative Examples 1G to 13 were imaged by an atomic force microscope (Nan〇Sc〇pe ηι manufactured by Veee Co., Ltd., Japan). The photons of the concave-convex pattern forming sheets of Examples 25 to 33 and Comparative Examples 1 to 13 were measured for the depth of the concavo-convex pattern in the image of the atomic force microscope, and the depths were averaged to obtain an average value. depth. The values of these are shown in Table 3. Further, the applicability of the well member was evaluated based on the following criteria based on the most frequent spacing of the threshold and the average depth of the bottom. The evaluation results are shown in Table 126510.doc 200912388. The most frequent pitch of the concave-convex pattern is 1 μm or less, and the average depth is 10% or more when the maximum-frequency pitch is 100%, which is suitable as an optical element. X : The most frequent spacing of the embossed pattern exceeds 1 μηη, or the average depth is insufficient. Set the MF spacing to 1 °% at 1 °%. Not suitable as an optical component. [Table 3] Average pitch of the concave-convex pattern (nm) Depth of the deepest portion of the concave-convex pattern (nm) Depth/pitch (%) Evaluation Example 25 280 250 89 〇 Example 26 280 230 82 〇 Example 27 300 250 82 〇 Example 28 280 230 82 〇 Example 29 280 230 82 〇 Comparative Example 10 1100 700 64 X Comparative Example 11 No uneven pattern X was formed X Comparative Example 12 300 28 9 X Comparative Example 13 No uneven pattern X was formed Example 30 280 250 89 〇Example 31 280 250 89 〇Example 32 280 250 89 〇Example 3 3 280 250 89 〇In Examples 25 to 29 and Comparative Examples 10 and 12, the substrate was made of the first resin.

On one side of the V, a laminated sheet provided with a hard layer is formed by serpentine deformation, and the hard layer is composed of a second resin having a glass transition temperature higher than a glass transition temperature of the first resin by more than 1 ° C, and is used in the production method. The concave-convex pattern forming sheet can be easily manufactured. Further, in the concave-convex pattern forming sheets obtained in Examples 25 to 29, the groove width of the concave-convex pattern is 1 μm or less, and the average depth of the bottom portion is 10% or more when the above-mentioned mode spacing is 100%. Therefore, it is suitable as an optical component. In Examples 25 to 29, the above-mentioned maximum frequency pitch and average depth were obtained because the thickness of the surface smooth hard layer was 50 μm or less and the deformation ratio was 50% or more. 126510.doc 106-200912388 Further, according to the manufacturing method of Examples 30 to 33 in which the uneven pattern forming sheet obtained in Example 25 is used as an engineering sheet, it is possible to easily manufacture the most frequent pitch and average with the concave-convex pattern forming sheet. Optical elements of the same concave and convex pattern. Further, in the comparative example 10, since the thickness of the surface hard smoothing layer exceeds 5 Å, the pitch of the concave-convex pattern of the obtained concave-convex pattern forming sheet exceeds 1 μm. Further, in Comparative Example 12, since the deformation ratio was 3%, the average depth of the bottom portion of the uneven pattern of the obtained concave-convex pattern forming sheet was less than 1% by weight when the most frequent pitch was 100%. These comparative examples are not necessarily suitable as optical elements. On the other hand, in Comparative Example 11 in which a biaxially stretched polyethylene terephthalate film was used as the resin layer, and a laminate sheet in which the glass transition temperature of the second resin was lower than the glass transition temperature of the first resin, In the manufacturing method of Comparative Example 13, since the smooth surface of the hard layer was not meandered, the uneven pattern was not formed. [Industrial Applicability] The uneven pattern forming sheet of the present invention can be used as a light diffuser and can be easily produced. According to the method for producing a concave-convex pattern forming sheet of the present invention, the concave-convex pattern forming sheet used as the light diffusing body can be easily produced. The light diffusing body of the present invention is excellent in the anisotropy of diffusion. According to the method for producing a light-diffusing body and the method for producing a light-diffusing body of the present invention, it is possible to easily and directly produce a light-diffusing body in which a concave-convex pattern having the same pitch and average depth as that of the uneven pattern-forming sheet is formed. The optical sheet of the present invention has excellent target optical characteristics and can easily make light 126510.doc -107- 200912388: characteristics: uniform sentence. The light-diffusing sheet of the present invention has excellent target light diffusibility, and is easy to make the light diffusibility non-uniform. The diffusing light guide and the backlight unit ' according to the present invention can be sufficiently diffused anisotropically. The embossed pattern forming sheet of Jiuyuan can be preferably used as an antireflector or phase: light... x' The concave-convex pattern forming sheet of the present invention may also be preferably: an engineering sheet for manufacturing a first element, which is a mold for manufacturing an optical element having a corrugated concave-convex pattern; BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an enlarged perspective view showing an enlarged portion of an embodiment of a concave-convex pattern forming sheet of |U] m of the present invention. Fig. 2 is a cross-sectional view showing the concave-convex pattern forming sheet of Fig. i cut in a direction orthogonal to the direction in which the concave-convex pattern is formed. The image is a gradation conversion image of an image obtained by photographing the surface of the concave-convex pattern by a surface optical microscope. Fig. 4 is an image obtained by performing Fourier transform on the image of Fig. 3. Figure 5 is a graph depicting the brightness over the distance from the center of the circle in the image of Figure 4. Figure 6 is a graph depicting the brightness on the auxiliary line 13 in the image of Figure 4. Fig. 7 is a cross-sectional view showing a laminated sheet according to an embodiment of the method for producing a concave-convex pattern forming sheet of the present invention. The drawing is an explanatory view showing an example of a method of producing a light diffuser having the uneven pattern forming sheet of the present invention. 126510.doc 200912388 Fig. 9 is a gradation conversion image of an image obtained by photographing the surface of the uneven pattern in Comparative Example 4 by a surface optical microscope. Fig. 10 is an image obtained by performing Fourier transform on the image of Fig. 9. Figure 11 is a graph depicting and plotting the brightness over the distance from the center of the circle in the image of Figure 10. Fig. 12 is a view showing the luminance on the auxiliary line Ls in the image of Fig. 10. Fig. 13 is a perspective view showing the first embodiment of the optical sheet of the present invention. Fig. 14 is a cross-sectional view showing a printing sheet used in the production of the optical sheet shown in Fig. 13. Figure 15 is a transmission electron micrograph of the surface of the printed sheet. Fig. 1 is a transmission electron micrograph of the surface of the optical sheet. Fig. 1 is a perspective view showing a second embodiment of the optical sheet of the present invention. Fig. 18 is a perspective view showing a third embodiment of the optical sheet of the present invention. Fig. 19 is a perspective view showing a fourth embodiment of the optical sheet of the present invention. Fig. 20 is a cross-sectional view showing another embodiment of the diffused light guide of the present invention. Fig. 2 is a cross-sectional view showing a first embodiment of a backlight unit of the present invention. Figure 22 is a cross-sectional view showing a second embodiment of the backlight unit of the present invention. Fig. 23 is an enlarged perspective view showing an enlarged portion of an embodiment of the concave-convex pattern forming sheet of the present invention. Fig. 24 is a gradation conversion image of an image obtained by photographing a surface of a pattern 126510.doc - 109 - 200912388 which is not in a specific direction by an atomic force microscope. Fig. 25 is an image obtained by performing Fourier transform on the image of Fig. 24. Figure 26 is a graph depicting the brightness over the distance from the center of the circle in the image of Figure 25. [Description of main component symbols] 10 concave-convex pattern forming sheet 10a laminated sheet 11 base material (transparent resin layer) 11a heat shrinkable film 12 hard layer 12a concave-convex pattern 12b bottom portion 13 resin-hard layer (surface layer) 210a 210b, optical sheet 210c' 210d 211 flat side surface 212, 215, uneven area 216, 217 213 heat shrinkable film 214 concave and convex area forming convex part 100' 200 backlight unit 310 diffusing light guide body 315 surface 126510.doc • 110- 200912388 316 Back 320 Reflector 330 Light Source 340 Diffusion Film 350 Bracts 360 Brightness Rising Film 126510.doc - in .

Claims (1)

200912388 X. Patent application scope: 1. A concave-convex pattern forming sheet comprising: a resin substrate and a resin hard layer provided on one surface of the substrate; and formed on a surface of the hard layer The difference between the glass transition temperature Tg2 of the resin constituting the hard layer and the glass transition temperature Tgl of the resin constituting the substrate (1^2_1^1) is 1 (rc or more, the most frequent pitch of the concave-convex pattern) When the thickness is more than 1 μm and is 20 pm or less, the average depth of the bottom of the concave-convex pattern is 10% or more when the above-mentioned maximum frequency spacing is 丨〇〇%. 2) A method for producing a concave-convex pattern forming sheet, which is characterized by including a step of forming a hard layer having a smooth surface, a thickness of more than 0.05 μm and a thickness of 5.0 μm or less to form a laminated sheet on one surface of a resin substrate; and folding at least the hard layer of the laminated sheet The step of deformation; and The hard layer is composed of a resin having a glass transition temperature higher than 10 ° C or more than the resin constituting the substrate. 3. The method for producing a concave-convex pattern forming sheet according to claim 2, wherein a uniaxially oriented heat shrinkable film is used as the resin substrate, and the laminated sheet is heated in the step of deforming the hard layer in a folded manner. The heat shrinkable film is shrunk in a uniaxial direction. 4_ A light diffusing body comprising a concave-convex pattern forming sheet of a request, wherein the base material and the hard layer of the concave-convex pattern forming sheet are transparent. 5_ a concave-convex pattern forming sheet, comprising: a resin base material; and a resin hard layer provided on one surface of the base material; and a direction along the one surface of the hard layer is formed In the concave-convex pattern, the hard layer is made of a metal or a metal compound, and the pitch of the concave-convex pattern exceeds i μηη and is 20 μΓη or less, and the average depth of the bottom of the concave-convex pattern is 10% or more when the above-mentioned maximum frequency spacing is 100%. . 6. The concavo-convex pattern of claim 5, wherein the hard layer is made of metal. 7. The concave-convex pattern forming sheet of claim 5, wherein the metal is selected from the group consisting of gold, aluminum, silver, carbon, copper, bismuth, indium, magnesium, bismuth, palladium, lead, platinum, rhodium, tin-titanium, vanadium, zinc, At least one metal ruthenium of the group consisting of 铋 8. A concave-convex pattern forming sheet, comprising: a metal having a smooth surface and a thickness exceeding 0.01 μm and being less than 2 μmη on one surface of a resin substrate a step of forming a hard layer to form a laminated sheet; and a step of deforming at least the hard layer of the laminated sheet by folding; and the hard layer is composed of a metal or a metal compound. 9. The method for producing a concave-convex pattern forming sheet according to claim 8, wherein a single-direction, direction-heat-shrinkable film is used as a resin substrate, and the laminated sheet is heated in a step of deforming the hard layer to be folded. The heat shrinkable film is shrunk in a single direction. . An engineering sheet original for manufacturing a light diffuser, which has the concave-convex pattern forming sheet of claim 5, and which is used as a surface-shaped 126510.doc 200912388 to form a pattern with the concave-convex pattern forming sheet and The mold of the light diffuser having the same depth and the same unevenness is used. A method for producing a light diffusing body, comprising: a step of applying an unhardened curable resin on a surface on which a concave-convex pattern is formed on an original sheet for producing a light diffusing body of claim 10; The curable resin is cured, and then the step of peeling off the cured coating film from the original sheet of the engineering sheet. 12. A method of producing a light-diffusing body, comprising: contacting a sheet-shaped thermoplastic resin with a surface on which a concave-convex pattern is formed on an original sheet for producing a light-diffusing body of claim 10; The thermoplastic resin is pressed against the original sheet of the engineering sheet, and heated in this state to soften it, followed by cooling; the step of peeling off the cooled sheet-shaped thermoplastic resin from the original sheet of the engineering sheet A method for curing the curable resin, comprising: a step of forming a material for laminating concave-convex pattern transfer on an original sheet for producing a light-diffusing body; and forming a concave-convex pattern on the concave-convex pattern Step of molding a product for engineering; peeling off the surface of the second engineering using the step of applying the uncured curable resin to the surface of the original surface of the original sheet of the above-mentioned engineering sheet, 126510.doc 200912388 The step of coating the film. A method of producing a light-diffusing body, comprising: a step of forming a material for forming a textured uneven pattern on a surface on which a pattern of a light-diffusing body for manufacturing a light-diffusing body is required to be ηπ n ^ %; The step of peeling off the uneven pattern transfer material deposited on the concave-convex pattern on the original sheet of the engineering sheet to prepare a molded article for secondary engineering. The sheet-shaped thermoplastic resin is brought into contact with the secondary engineering: the shape and the above-mentioned engineering a step of contacting the surface of the original sheet and the concave-convex pattern on one side; pressing the sheet-like hot T plastic resin on the secondary engineering molded article, and heating and softening in this state, and thereafter performing a step of cooling; and a step of peeling off the cooled sheet-shaped thermoplastic resin from the molded article for secondary engineering. An optical sheet characterized in that a concave-convex region having irregularities is dispersedly disposed on one side or both sides of a flat surface. 16. The optical sheet of claim 15, wherein the uneven regions are unevenly arranged. 17. A light diffusing sheet comprising the optical sheet of claim 15. 18. The light-diffusing sheet of claim 17, wherein the frequency-to-frequency spacing A of the unevenness in the concave-convex region exceeds 1 μm and is less than 20 μm, and the ratio of the average depth b of the unevenness to the most frequent spacing Α (Β/Α) is (Μ~3.0. 19) The light-diffusing sheet of claim 18, wherein the concave-convex regions are dotted in a dotted manner. 20. A diffusing light guiding body characterized by: a wavy shape formed by a meandering on one side The transparent resin layer of the concave-convex pattern is formed, 126510.doc 200912388 The most frequent pitch of the concave-convex pattern is more than 1.0 μπι and is 20 μηι or less, and the ratio of the average depth 凹凸 of the unevenness to the most frequent spacing Α (Β/Α) is 0.1 to 3.0. A backlight unit comprising: a diffusing light guide according to claim 20; and a reflecting plate disposed opposite to a surface of the diffusing light guiding body opposite to a surface on which the concave-convex pattern is formed; And a light source ' disposed between the diffused light guide and the reflector. 22_ A backlight unit, comprising: a diffused light guide according to claim 20; and a reflector opposite to the diffusion guide Light body shape And a light source of the surface of the concave-convex pattern on the side opposite to the surface of the concave-convex pattern; and a light-emitting material that is adjacent to the one side surface of the diffusing light guide. 23. A concave-convex pattern-forming sheet, comprising: a resin substrate; a resin hard layer provided on at least a part of the outer surface of the substrate, wherein the hard layer has a wavy concave-convex pattern, and a glass transition temperature Tg2 of the resin constituting the hard layer and a glass transition temperature Tgl of the resin constituting the substrate The difference (Tg2-Tgl) is 1 (TC or more, and the most frequent pitch of the concave-convex pattern is 1 μm or less. The average depth of the bottom of the concave-convex pattern is 1% or more when the above-mentioned minimum frequency spacing is 1%%. A method for producing a concave-convex pattern forming sheet, comprising: providing a resin-made hard layer having a smooth surface on at least a part of an outer surface of a resin substrate to form a laminated sheet; and forming the laminated sheet a step of at least a hard layer serpentine deformation; and 126510.doc 200912388 The hard layer has a glass transition temperature that is 1 高 higher than the resin constituting the substrate. 25. An antireflection body comprising the concavo-convex pattern forming sheet of claim 23. 26. A phase difference plate comprising the concavo-convex pattern forming sheet of claim 23. 27. An optical element manufacturing process A sheet having the feature of the concave-convex pattern forming sheet of claim 23, and used as a mold for producing an optical element having a concave-convex pattern having the same frequency-to-frequency spacing and average depth as the concave-convex pattern forming sheet. Doc