KR100812877B1 - Method for manufacturing optical element with diffuse reflection compensation film and optical element with diffuse reflection compensation film manufactured by the above method - Google Patents

Abstract

The present invention comprises the steps of laminating a compensation film on the TAC film upper part of the polarizing film, cutting the polarizing film provided with the compensation film to a predetermined size, to prepare a light diffusion composition by mixing inorganic particles or polymer organic particles, etc. step; The optical diffusing layer coating step of coating the light diffusion composition on the upper surface of the compensation film or retardation film to form a light diffusion layer, and a method of manufacturing an optical element having a diffuse reflection compensation film consisting of a curing step and the diffuse reflection compensation film prepared in this manner The present invention relates to an optical element provided with.

Compensation film or retardation film used in the LCD cell is typically located between the polarizing element and the LCD cell serves to compensate. The compensation film was disposed on the top of the polarizing film and then coated with an anti-reflective function layer to prepare a diffuse reflection compensation film having excellent transparency and anti-glare so that the display surface could be seen without glare.

Anti-reflective film, compensation film, anti-reflective coating layer

Description

A manufacturing method of an optical element having a diffuse reflection compensation film and an optical element having a diffuse reflection compensation film manufactured by the above-described method TECHNICAL FIELD

1 is a structural diagram of an optical element in which a compensation film is laminated on an outermost layer of a polarizing film.

2 is a structural diagram of an optical element in which a compensation film laminated with an antiglare transparent support film is disposed on a top plate of a polarizing film.

3 is a structural diagram of an optical device having a diffuse reflection compensation film manufactured according to the present invention.

4 is a graph showing transmittance of the optical device according to Example 1 of the present invention.

5 is a graph showing transmittance of the optical device according to Example 2 of the present invention.

6 is a graph showing transmittance of the optical device according to Example 3 of the present invention.

7 is a graph showing transmittance of the optical device according to Comparative Example 1. FIG.

8 is a graph illustrating transmittance of the optical device according to Comparative Example 2. FIG.

9 is a graph of cross-transmittance optical elements of Examples and Comparative Examples.

* Explanation of symbols for main parts of the drawings

100: LCD cell 200: adhesive

300: transparent support 400: polarizing element

500: transparent support 600: adhesive

700: cycloolefin film 800: pressure-sensitive adhesive

800 ': diffuse reflection coating layer 900: diffuse reflection transparent support film

The present invention relates to a method of manufacturing an optical device having a diffuse reflection compensation film and an optical device having a diffuse reflection compensation film manufactured in this manner. More specifically, the step of laminating the compensation film on the triacetyl cellulose (hereinafter referred to as 'TAC') film, cutting the polarizing film provided with the compensation film to a predetermined size, inorganic to the ultraviolet curable resin Preparing a light diffusion composition by mixing particles or polymer organic particles; The method of manufacturing an optical device having a diffuse reflection compensation film comprising a light diffusion layer coating step and a curing step of coating the light diffusion composition on the compensation film or the retardation film to form a light diffusion layer, and a diffuse reflection compensation film manufactured in this manner The invention relates to an optical element provided. The present invention is a method for manufacturing an optical device excellent in the degree of light diffusion (Haze), transparency, diffuse reflection effect, etc. than conventional anti-reflective polarizing film by coating a solution containing organic particles or inorganic particles on the compensation film to be.

In a cathode-ray tube (CRT) display or liquid crystal display, accelerated electrons impinge on the phosphor inside the front glass and emit energy, causing the phosphor to emit red, green, and blue light. Emitted to the front side. When the display is used indoors, when a light such as a fluorescent light is incident on the display surface and the light is reflected, the screen is blinded and the screen is difficult to recognize.

Conventionally, there has been a case of dispersing a light diffusing material in a transparent or translucent resin body (Japanese Patent Laid-Open No. 55-46707). However, this conventional technology has a problem of reducing the concentration effect of the lens sheet used to improve the front brightness of the transmissive liquid crystal display device because the reflection performance is secured by backscattering.

In addition, in most cases, a triacetyl cellulose (TAC) film is coated on one surface to produce a diffuse reflection film. In this case, since the overall thickness of the polarizing film becomes thick, problems such as transparency occur.

The present invention is to solve the problems of the prior art, to produce a diffuse reflection compensation film by producing a diffuse reflection compensation film coated with a light diffusing material including inorganic particles and organic particles in a compensation film or a retardation film, not a triacetyl cellulose film It aims at manufacturing the optical element provided. Therefore, when light is emitted from the inside, it is possible to scatter the light to prevent glare, and because it does not attach a separate diffuse reflection film to the compensation film by using an adhesive, the optical film having a reflection reflection compensation film having a thin thickness and transparency is maintained. The device can be manufactured. In addition, the process is simple and economical and efficient film production is possible.

An object of the present invention is the step of laminating a compensation film on the TAC film, cutting the polarizing film provided with the compensation film to a predetermined size, light diffusion composition by mixing inorganic particles or polymer organic particles, such as UV curable resin Preparing a; And a light diffusing layer coating step of forming the light diffusing layer by coating the light diffusing composition on the compensation film or the retardation film, and curing the polarizing film including the light diffusing layer using photocuring. It can be achieved through a method of manufacturing an optical element having a diffuse reflection compensation film comprising a light diffusing layer and a diffuse reflection compensation film prepared by such a method.

Hereinafter will be described in detail focusing on the technical configuration of the present invention.

The present invention relates to a method for manufacturing an optical element having a diffuse reflection compensation film and an optical element having a diffuse reflection compensation film produced by such a method. Method for manufacturing a diffuse reflection compensation film according to the present invention comprises the steps of laminating the compensation film on the TAC film, cutting the polarizing film provided with the compensation film to a predetermined size, inorganic particles or polymer organic particles, such as UV curable resin Mixing the steps to prepare a light diffusion composition; A light diffusion layer coating step of coating the light diffusion composition on the compensation film or the retardation film to form a light diffusion layer; And a curing step of curing the polarizing film including the light diffusion layer using photocuring. Each step is described below.

(1) Lamination stage of compensation film

The compensating film or the retardation film is laminated on the outside of the TAC film of the polarizing film by using an adhesive. The compensation film or retardation film is usually located between the liquid crystal display (hereinafter referred to as "LCD") cell and the polarizing element to perform a compensation role. Recently, the externally implemented image is not clearly seen despite the use of a backlight light source. In order to solve this problem, the film uniaxially stretched on the top plate has a 45 degree angle with the light absorption axis of the polarizing film, To make a clear image observation. In the polarizing film of this type, to form a light diffusion coating layer causing diffuse reflection on the surface of the compensation film uniaxially stretched on the outermost portion of the polarizing film.

(2) cutting the polarizing film to a predetermined size

The optical device is cut to a predetermined size after manufacturing an optical device having a compensation film for coating unnecessary parts, reducing costs, and simplifying a manufacturing process.

(3) step of preparing the light diffusion composition

In order to prevent the glare from reflection of light on the surface of the polarizing film, a metal or a high molecular writer such as inorganic particles is mixed with a commonly used ultraviolet curable resin. Examples of the inorganic particles include SiO ₂ and TiO ₂ , and organic particles may include styrene beads, melamine beads, acryl beads, acrylic-styrene beads, polycarbonate beads, polyethylene beads, polyvinyl chloride beads, and the like. Styrene beads are preferred and two or more kinds of organic particles may be used together. Since the fine particles are all non-aggregated, effective scattering is obtained by the difference in refractive index with the translucent resin, thereby preventing surface light emission. Each of the materials included in the mixture will be described in detail below.

(4) light diffusion layer coating step

In order to coat the light diffusion layer, the present invention uses spin coating. The spin coating method is a method of coating an arbitrary liquid on an object by rotating the substrate to push the composition placed on the substrate out by using centrifugal force. Spin coating has the advantage of improving the yield through the shortening of the manufacturing process.

In general, the spin coater used in the spin coating method is used between about 1000rpm and 10000rpm and can adjust the rotation speed with the variable resistance.In the center of the spin coater, the spin coater can prevent the object from escaping out while rotating the object. There is a vacuum tube holding the object.

The light diffusing composition used in the present invention comprises an ultraviolet curable resin, a curing agent and light diffusing fine particles of inorganic particles or organic particles. Look at each component of the light diffusion composition used in the coating step.

<UV curable resin>

As the photocurable resin, ultraviolet curable resin is generally used. As the photocurable resin, unsaturated polyester resins, polyfunctional acrylate resins, epoxy acrylic resins, epoxy acrylate resins, urethanes, urethane acrylates and the like can be used alone or in combination. Although the urethane-acrylate resin was used in the present invention, usable curable resins are not limited to the listed resins as long as they exhibit the same effect.

<Hardener>

The curing agent of the present invention can be appropriately selected and used according to the form of the functional group present in the curable resin, preferably isocyanate compound, epoxy compound, aziridine compound, metal chelate compound, metal alkoxide metal salt, amine compound , Hydride compounds and the like are used alone or in combination.

The isocyanate compound in the present invention is an aliphatic diisocyanate such as aromatic diisocyanate compounds such as diphenylmethane isocyanate, xylene diisocyanate, and hexamethyl diisocyanate. ) May be used alone or in combination.

In addition, the epoxy compound in the present invention is a polyethylene glycol diglycidyl ether (diglycidyl ether), diglycidyl ether (diglycidyl ether), trimethylol propane triglycidyl ether (trimethylol propane triglycidyl ether) and the like alone Or mixed.

It is preferable to use 0.3 to 5.0 weight% of hardening | curing agents in this invention with respect to 100 weight% of light-diffusion compositions. In the present invention, the curing agent is an additive used to control the molecular weight or chain structure of the light-diffusion composition, and when the curing agent is used in the above-described range, the effect of suppressing phase separation and the like is prominent.

<Light Diffusion Particles>

The light-diffusion fine particles in the present invention are inorganic particles such as silica, calcium carbonate, aluminum hydroxide, magnesium hydroxide, clay, talc, titanium dioxide, cesium oxide, transparent organic particles such as acrylic resin, styrene resin, epoxy resin and silicone resin. Or white organic particles. In addition, when the acrylic polymer is used as the main component of the adhesive composition, polymer organic particles satisfying the refractive index and the degree of diffusion required for light diffusion are preferable. The polymer organic particles include melamine beads (refractive index: 1.57), acrylic beads (refractive index: 1.47), acrylic-styrene beads (refractive index: 1.54), polycarbonate beads, polyethylene beads, vinyl chloride beads, and the like.

It is preferable to use the light-diffusion microparticles | fine-particles suitable for the spray-coating system, and, as for the light-diffusion microparticles | fine-particles used by this invention, it is more preferable to use acryl-type beads or styrene beads. In the present invention, it is also preferable to use inorganic beads as light diffusing fine particles. The acrylic beads, styrene beads or inorganic beads may be used alone or in combination.

When the light diffusing layer is added, fine unevenness is formed on the surface of the light diffusing layer. The surface of the light diffusing layer having fine unevenness has a 10-point average roughness (Rz) of 1 to 10 μm and an average inclination (θa) of 15 to Make it 10˚. If the 10-point average roughness is less than 1 μm, the light diffusivity due to the scattering particles of the film is weakened. If the 10-point average roughness is larger than 10 μm, the light diffusivity is strong and the luminance is low, which is not preferable. In addition, if the average inclination is less than 15 ° light diffusion is weak, if the average inclination is greater than 20 ° light diffusion is strong and the front brightness is too low is not preferable. The 10-point average roughness is the difference between the average value of the top to fifth normal heights and the average value of the bottom depths to the fifth depths with respect to the average line of the portion where the reference length is selected from the section curve of the measured object. In addition, the average inclination is obtained by the same measurement method as the measurement when obtaining the ten-point average roughness, and is an average value of the angle between the average line and the cross-section curve of the portion where the reference length is selected from the cross-section curve of the object under test.

Acrylic beads used in the present invention are ethyl acrylate, butyl acrylate, amyl acrylate, 2-ethylhexyl acrylate, octyl acrylate, cyclohexyl acrylate, benzyl acrylate, butyl methacrylate, 2-ethylhexyl meta Acrylate, cyclohexyl methacrylate, benzyl hexyl methacrylate, cyclohexyl methacrylate, benzyl methacrylate, methyl acrylate, methyl methacrylate, benzyl methacrylate, vinyl acetate, styrene, acrylonitrile, acrylic acid , Methacrylic acid, maleic anhydride, itaconic acid, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, N-methylol acrylamide, acrylamide, methacrylamide, glycidyl Amide, lauryl acrylate, ethoxydiethylene glycol acrylate, methoxy triethylene glycol Acrylate, phenoxyethyl acrylate, tetrahydrofuryl acrylate, isobornyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 2-hydroxy-3-phenoxy acrylate, neopentyl Glycol diacrylate, 1,6-hexanediol diacrylate, trimethylol propane triacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol hexaacrylate, trimethylolpropane acrylate benzoate , 2-ethylhexyl methacrylate, n-stearyl methacrylate, cyclohexyl methacrylate, tetrahydrofurfuryl methacrylate, 2-hydroxyethyl methacrylate, 2-hydroxybutyl methacrylate, 1 , 6-hexanediol dimethacrylate, trimethylolpropane trimethacrylate, glycerin dimethacrylate Agent, glycerin dimethacrylate acrylate hexamethylene diisocyanate, pentaerythritol triacrylate is preferably a monomer or oligomer of hexamethylene diisocyanate used alone or in combination.

In addition, the styrene beads used in the present invention may be used alone or in combination with styrene, α-methylstyrene, α-ethylstyrene, o-ethylstyrene, p-ethylstyrene, 2,4-dimethylstyrene or vinyl toluene. desirable.

In addition, the inorganic particles used in the present invention include silica (SiO ₂ ), titanium oxide (TiO ₂ ), zirconium oxide (ZrO ₂ ), manganese oxide (MnO ₂ ), cobalt oxide (CoO), and iron oxide (Fe ₂ O _3). ) Is preferably used alone or in combination.

The content of the light diffusing fine particles is preferably 1% by weight to 2% by weight with respect to 100% by weight of the light diffusion composition, and more preferably 1.5% by weight to 2% by weight. When the content of the light diffusing fine particles is less than 1% by weight, it is difficult to expect a light diffusing effect, and when the content of the light diffusing fine particles is more than 2% by weight, the light diffusing fine particles may be excessively reduced to reduce transmittance.

Through the light diffusing fine particles used in the present invention, a polarizing film having excellent dispersibility and uniform and high light diffusivity can be obtained. It is preferable that the shape of light-diffusion fine particle is spherical or needle shape. Further, the light diffusing fine particles are preferably hollow inorganic particles or organic particles in the form of pores or hollows. The inorganic or organic particles in the cavity mean particles in which the internal empty space of each of the light diffusing fine particles is kept empty without being filled with other impurities. Forming method, sintering method, stretching method, track etching method, solvent phase separation method, extraction method, and the like are used to prepare the shape of the pupil. It may be appropriately selected and used according to the type of.

The particle diameter of the light-diffusion fine particles is preferably 1 µm to 4 µm, more preferably 2 µm to 3 µm. If the particle diameter of the light-diffusion fine particles is smaller than 1 μm, it is difficult to obtain a satisfactory light-diffusion effect, and the light-diffusion is lowered, so that the image is discolored to aluminum color. In addition, when the particle diameter of the light-diffusion fine particles is larger than 4 μm, the background of the screen tends to be rough due to the light-diffusion fine particles in the adhesive composition, and the image contrast is deteriorated.

In the present invention, the refractive index of the light diffusing fine particles preferably has a difference of 0.01 to 0.4 with respect to the refractive index of the light diffusing composition. More preferable refractive index difference is 0.07-0.3. If the difference in refractive index is less than 0.01, light diffusion does not occur and if the difference in refractive index is greater than 0.4, the internal scattering is excessively large and the total light transmittance is weakened. In addition, the refractive index of the light diffusing fine particles must be lower than the refractive index of the light diffusing composition to easily adjust the refractive index and improve productivity.

<Dispersant>

In the present invention, an organic solvent that is a dispersant is used to apply the hard coating layer to the compensation film. In the present invention, it is preferable to use an organic solvent in which the hard coating layer composition can be evenly dispersed. The organic solvent is selected in consideration of the improvement of the coating property, adhesion, and hardness strengthening function of the hard coating layer.

The organic solvent used in the present invention is a C1-8 saturated hydrocarbon alcohol, such as alcohol-based methanol, isopropanol, butanol, t-butanol, isobutanol, acetone of ketones, methyl ethyl ketone, methyl isobutyl ketone or the like. Saturated hydrocarbon-based diketones having 1 to 8 carbon atoms, such as saturated hydrocarbon ketones of 1 to 8 and acetyl acetone, ethyl acetate of esters, and ethyl cellosolves of 1 to 8 saturated hydrocarbon-based esters such as butyl acetate and ether alcohols. , Methyl cellosolve, butyl cellosolve, 1-methoxy-2-propanol, and other N-methyl pyrrolidone, ethyl cellosolve acetate, diacetone alcohol and the like are used alone or in combination. Moreover, benzene, toluene, xylene, ethylbenzene, etc. which correspond to an aromatic hydrocarbon can also be used individually or in mixture.

The organic solvent is preferably 20 parts by weight to 110 parts by weight with respect to 100 parts by weight of the hard coating layer composition, and more preferably 30 parts by weight to 80 parts by weight. When the content of the organic solvent is less than 20 parts by weight with respect to 100 parts by weight of the hard coat layer composition, the viscosity is low, so that applicability and adhesion with the compensation film are lowered. When the content of the organic solvent is greater than 110 parts by weight, the amount of the organic solvent is greater than that of the hard coating layer composition. Profitability is inferior by using

It is preferable that the thickness of the coated diffuse reflection compensation film prepared by mixing the composition as described above is 30 to 60 μm, more preferably 45 to 55 μm, and the thickness of the light diffusion layer is 2 to 15 μm. More preferably, it is 5-10 micrometers. When the thickness of the hard coating layer is less than 2㎛ is too thin, it is difficult to secure scratch resistance and chemical resistance, when larger than 15㎛ has a disadvantage in that the economic efficiency during spin coating. The above thickness is advantageous for scratching and chemical resistance and the surface hardness is most suitable.

Additionally, the light diffusing composition may contain an antifoaming agent, a coating improver, a thickener, an organic lubricant, an organic polymer particle, an antioxidant, an ultraviolet absorber, a blowing agent dye, and the like.

<Leveling agent>

In the present invention, to level the surface of the hard coating layer, a leveling agent is mixed and used in the hard coating layer composition. The leveling agent can be used by mixing a ketone or an ester solvent with a silicone resin. As a leveling agent by this invention, it is preferable to use a silicone diacrylate and a silicone polyacrylate compound individually or in mixture.

The content of the leveling agent is preferably 0.1% to 3% by weight, more preferably 0.5% to 2% by weight in 100% by weight of the light diffusion composition. If the leveling agent is less than 0.1% by weight, it is difficult to expect the leveling effect, and when it is 3% by weight or more, the hardness may be weakened.

(5) curing step

The curing step according to the present invention uses a curing method commonly used in the manufacturing process of an optical element including a diffuse reflection compensation film.

The curable resin and the curing agent may vary according to the difference in the curing method, and the range is not limited to the curable resin and the curing agent specifically mentioned in the present invention.

Hereinafter, the present invention will be described in more detail with reference to preferred examples of the present invention and comparative examples compared with the present invention.

Example 1

A light diffusing composition is prepared by mixing 20% by weight of an ultraviolet curable resin, 1% by weight of SiO ₂ (size: 1-4 μm), a leveling agent, and a dispersing agent with 80% by weight of xylene. The prepared light diffusing composition is laminated using an adhesive so as to be located on the outermost layer of the compensation film (ESSINA film of Sekisui Co., Ltd.). The laminated polarizing film is cut into 500mm * 500mm and then coated in a continuous rotary coating machine. The light diffusing composition prepared above is uniformly coated on the cycloolefin surface at 500 rpm in a continuous rotary coater. The coated optical device is dried, and then irradiated with ultraviolet rays to cure the optical device, thereby manufacturing an optical device having a thickness of 5 μm.

Example 2

A light diffusing composition is prepared by mixing 20 wt% of ultraviolet curable resin, 1.5 wt% of SiO ₂ (size: 1-4 μm), a leveling agent, and a dispersing agent with 80 wt% of xylene. The prepared light diffusing composition is laminated using an adhesive so as to be located on the outermost layer of the compensation film (ESSINA film of Sekisui Co., Ltd.). The laminated polarizing film is cut into 500mm * 500mm and then coated in a continuous rotary coating machine. The light diffusing composition prepared above is uniformly coated on the cycloolefin surface at 500 rpm in a continuous rotary coater. The coated optical device is dried, and then irradiated with ultraviolet rays to cure the optical device, thereby manufacturing an optical device having a thickness of 5 μm.

Example 3

A light diffusing composition is prepared by mixing 20% by weight of an ultraviolet curable resin, 2% by weight of SiO ₂ (size: 1-4 μm), a leveling agent, and a dispersing agent with 80% by weight of xylene. The prepared light diffusing composition is laminated using an adhesive so as to be located on the outermost layer of the compensation film (ESSINA film of Sekisui Co., Ltd.). The laminated polarizing film is cut into 500mm * 500mm and then coated in a continuous rotary coating machine. The light diffusing composition prepared above is uniformly coated on the cycloolefin surface at 500 rpm in a continuous rotary coater. The coated optical device is dried, and then irradiated with ultraviolet rays to cure the optical device, thereby manufacturing an optical device having a thickness of 5 μm.

Comparative Example 1)

It is an optical element which does not form the coating layer which has a diffuse reflection function in a cycloolefin film.

Comparative Example 2)

In order to implement an anti-glare function in the polarizing film, an anti-reflective triacetyl cellulose film was laminated on a cycloolefin film using an adhesive to produce a diffuse reflection film.

[Table 1] is a table comparing the adhesion, film thickness, cloudiness, transparency and the like of the polarizing film corresponding to the embodiment made by the present invention and the polarizing film corresponding to the comparative example.

The single plate transmittances of Examples 1, 2 and 3 are lower than those of Comparative Example 1, but are higher than those of Comparative Example 2, and the orthogonal transmittances are almost similar. The degree of polarization also shows a similar value, and the transparency is very high compared to Comparative Example 2. The cloudiness of Example 1 is lower than that of Comparative Example 2. The thickness of the film is very thin as compared with Comparative Example 2. In other words, the optical device according to the present invention has been shown to have a much thinner thickness than laminating the anti-glare TAC film using an adhesive, but does not affect other physical properties.

division Adhesion Single plate transmittance (%) Orthogonal Transmittance (%) Polarization degree (%) Cloudiness (%) Transparency (%) Film thickness (㎛) Example 1 100/100 37.60 0.00 100.00 14.70 52.80 245 Example 2 100/100 34.16 0.01 99.98 25.20 41.30 245 Example 3 100/100 36.97 0.00 99.99 38.50 36.50 245 Comparative Example 1 - 43.39 0.00 100.00 0.20 99.70 240 Comparative Example 2 34.33 0.00 100.00 26.20 42.30 295

[Table 2] is a table showing the color values comparing Examples 1,2,3 and Comparative Examples 1,2.

Item L a b Example 1 61.32 -1.02 3.72 Example 2 58.45 -0.96 3.72 Example 3 60.80 -1.29 3.44 Comparative Example 1 65.87 -1.44 3.93 Comparative Example 2 58.59 -1.03 3.97

Figure 3 is a structure of an optical element having a diffuse reflection compensation film produced according to the present invention, unlike the conventional invention is a form in which a light diffusion coating layer is added without applying an adhesive on the upper portion of the cycloolefin film. 4, 5 and 6 show graphs of transmittances of optical devices according to Examples 1 and 2 and 3 of the present invention, and FIGS. 7 and 8 show graphs of transmittances of optical devices according to Comparative Examples 1 and 2. In addition, Figure 9 shows a graph of the transmittance crossover of the optical element of the Example and Comparative Example.

In the above, this invention was demonstrated in detail with reference to an Example and a comparative example centering on a structure. However, the scope of the present invention is not limited to the above embodiments, but may be embodied in various forms of embodiments within the scope of the appended claims. Without departing from the gist of the invention as claimed in the claims, any person of ordinary skill in the art is considered to be within the scope of the claims described in the present invention to the extent possible to vary.

Through the above technical configuration, the present invention has an effect of providing a method of manufacturing a polarizing film by coating the light diffusing composition evenly on a compensation film or a retardation film and a polarizing film prepared by such a method. In addition, through the light diffusion layer coated by the present invention it is also possible to obtain a diffuse reflection prevention and viewing angle improvement effect. In addition, the light diffusion layer (Haze), the transparency (Clarity), the viewing angle and the like than the light diffusion layer existing in the liquid crystal display device.

Claims (9)

In the method of manufacturing a diffuse reflection compensation film, Laminating a compensation film on the TAC film; Preparing a light diffusing composition by mixing light diffusing fine particles such as inorganic particles or polymer organic particles with ultraviolet curable resin; A light diffusion layer coating step of coating the light diffusion composition on the compensation film or the retardation film to form a light diffusion layer; And The polarizing film comprising the light diffusion layer is an optical element manufacturing method having a diffuse reflection compensation film, characterized in that it comprises a curing step of curing using thermal curing or photocuring. The method of claim 1, The light diffusing composition is an optical element manufacturing method having a diffuse reflection compensation film, characterized in that it comprises an ultraviolet curable resin, a curing agent, light diffusing fine particles, dispersant, leveling agent. The method of claim 1, The inorganic particles are SiO ₂ , TiO ₂ characterized in that the diffuse reflection compensation film production method. The method of claim 1, The organic particles are styrene beads, melamine beads, acryl beads, acrylic-styrene beads, polycarbonate beads, polyethylene beads, polyvinyl chloride beads manufacturing method of the diffuse reflection compensation film. The method of claim 1, The coating step is a diffuse reflection compensation film manufacturing method characterized in that by the spin coating method. The method of claim 1, Particle diameter of the light diffusing fine particles is 1㎛ to 4㎛ characterized in that the reflection reflection film manufacturing method. In the diffuse reflection compensation film according to the optical element manufacturing method comprising a diffuse reflection compensation film according to claim 1, The diffuse reflection compensation film is a diffuse reflection compensation film, characterized in that consisting of a TAC film, a compensation film, light diffusion layer in order from the bottom. The method of claim 7, wherein The diffuse reflection compensation film, characterized in that the thickness of the light diffusion layer is 2 to 15㎛. An image display apparatus having an optical element comprising a diffuse reflection compensation film manufactured according to the optical element manufacturing method including the diffuse reflection compensation film according to claim 1, comprising: a cathode ray tube (CRT), a liquid crystal display An image display apparatus used for at least one of a group consisting of a liquid crystal dispaly (LCD), a plasma display panel (PDP) and an organic light emitting diode (OLED).

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