KR100771954B1 - Method for Manufacturing compensation film for IPS mode with using Nematic Liquid Crystal - Google Patents

Abstract

The present invention is to provide a method for producing a compensation film for IPS using a nematic liquid crystal, the method for manufacturing a compensation film for IPS using a nematic liquid crystal is used as a base film, the transparent support is coated on the transparent support on the alignment film Drying and curing to form an alignment film; A rubbing step of performing a rubbing treatment on the alignment layer; And a liquid crystal layer forming step of coating, drying, and curing a nematic liquid crystal on the rubbed alignment layer.

Description

Method for manufacturing compensation film for IPS mode with using Nematic Liquid Crystal}

1 is a structural diagram of an IPS compensation film using a nematic liquid crystal according to an embodiment of the present invention,

Figure 2 is a graph showing the phase difference change according to the inclination angle with respect to the phase axis of the compensation film obtained in Example 1 of the present invention,

Figure 3 is a graph showing the phase difference change according to the inclination angle with respect to the phase axis of the compensation film obtained in Example 2 of the present invention,

4 is a graph showing a phase difference change according to an inclination angle with respect to a phase axis of a TAC film obtained in Comparative Example 1. FIG.

Explanation of symbols on the main parts of the drawings

100: nematic liquid crystal 200: alignment film

300: transparent support

The present invention relates to a method for producing a compensation film for IPS using nematic liquid crystals and a compensation film produced by the method, in particular as a compensation film of an IPS (In-Plane Switch) LCD (Liquid Crystal Display) of the liquid crystal display device It relates to a method for producing a compensation film for IPS using a nematic liquid crystal used and a compensation film produced by the method.

In general, a liquid crystal flat panel display can be driven for several hours on a battery due to low power consumption compared to a Cathode Ray Tube (CRT) display, and has a small space, and a small weight makes it easy to carry. For one reason, the spread is spreading rapidly. In addition, the size of the product is increasing from small to large-sized display devices such as computer monitors and TVs. In particular, in the case of medium and large sized liquid crystal displays, it is important to secure the quality of a competitive display when it has a clear image quality at a wide viewing angle and improves the brightness contrast when the driving cell is turned on and off.

For this reason, various liquid crystals such as Dual Domain TN, Asymmetrically Aligned Microcell (ASM), Vertical Alignment (VA), Surrounding Electrode (SE), Patterned VA (PVA), and In-Plane Switching (IPS) modes. Mode displays are being developed. Each of these modes has a unique liquid crystal array and has inherent optical anisotropy. Therefore, in order to compensate for the change in the optical axis of linearly polarized light due to the optical anisotropy of these liquid crystal modes, various optical anisotropy compensation films are required.

The compensation film is important not only for optical compensation due to liquid crystal which is an optical anisotropic body, but also for compensating light leakage occurring at an optical viewing angle near 45 DEG from the optical axis of the orthogonal polarizing element, a compensation film having optical anisotropy is important. Therefore, it is important to develop an optical film capable of precisely and effectively controlling optical anisotropy for optical compensation of liquid crystal displays in various modes.

Optical anisotropy can be divided into Re, which is an in-plane retardation value, and Rth, which is a retardation value in the z-axis direction.

According to the prior art, in order to compensate for the IPS mode (LCD) LCD, the + C-plate compensation film manufactured mainly by the stretching method was used.

However, the + C-plate compensation film produced by the stretching method was difficult to implement the + C-plate function. It also resulted in reduced process complexity and yield, and increased thickness.

Accordingly, the present invention has been proposed to solve the above conventional problems, and an object of the present invention is to form an alignment layer on a transparent support and to coat a nematic liquid crystal, thereby functioning as a + C-plate compensation film as a thin film. It is to provide a method for producing a compensation film for IPS using the formed nematic liquid crystal and a compensation film produced by the method.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail centering on a technical structure.

Method for producing a compensation film for IPS using a nematic liquid crystal according to the present invention comprises the steps of using a transparent support as a base film, coating the alignment film on the transparent support, drying, curing to form an alignment film; A rubbing step of performing a rubbing treatment on the alignment layer; And a liquid crystal layer forming step of coating, drying, and curing a nematic liquid crystal on the rubbed alignment layer.

The transparent support used as the base film in the present invention includes a triacetyl cellulose (TAC) film, a polyethylene terephthalate (PET) film, an unstretched cyclo olefin (COP) -based film, and the like.

Hereinafter, a step-by-step look at the manufacturing method of the compensation film for IPS using the nematic liquid crystal according to the present invention.

(1) alignment film forming step

The alignment film is prepared by mixing an alignment film coating composition including an alignment film resin and a curing agent in a solvent to form a solution, and then performing coating by an inline coating method on the transparent support, which is the base film, and then drying and curing the alignment film. Is done.

1) alignment layer coating step

Coating heads used in the in-line coating method of the present invention are, for example, knife (Knife), comma (Comma), die (Die), micro gravure, gravure, nip (nip), spray and the like. In-line coating as in the present invention eliminates or minimizes the fine voiding phenomenon caused by using the coating heads listed above. In addition, air filling the voids can cause a change in the refractive index and scatter the light to reduce the overall transmittance.

In the present invention, an alignment film coating composition comprising an alignment film resin and a curing agent is defined as a solvent and a solution in a form prepared as an alignment film coating solution.

It is preferable to use ultraviolet curable resin for the orientation film resin used by this invention. As the example, an unsaturated polyester resin, a polyfunctional acrylate resin, a polyfunctional methacrylate, a urethane acrylate, an epoxy acrylic resin, an epoxy acrylate resin or the like or a mixture of these can be used. Of course, if the alignment film resin usable in the present invention exhibits the same effect, the range is not limited to the resins listed above.

In addition, the said alignment film resin uses the compound which has a 1 or more polar group and 1 or more functional group in a molecule | numerator. The at least one polar group is preferably at least one of a hydroxy group, an amino group, a urethane group or an isocyanate ring in the compound, and different polar groups may be present. As the alignment film has a smaller surface resistance, the vertical alignment of the liquid crystal to be described later increases, so that an alignment film resin having a small surface resistance is preferably used. As one example, it is preferable to use a resin having a side chain.

The content of the alignment film resin is preferably 15 wt% to 55 wt% in 100 wt% of the alignment film coating solution. More preferably, it is 20 to 40 weight%. If the content of the alignment film resin is less than 15% by weight, the hardness is low to insufficient to form the alignment film, if more than 55% by weight more than necessary there is a disadvantage in that the economical efficiency of the alignment film resin is included.

In addition, the curing agent may be used by selecting one curing agent or a mixture of two or more according to the type of alignment film resin, preferably isocyanate compound, epoxy compound, aziridine compound, metal chelate compound, metal alkoxide metal salt, amine A compound, a hydrazine compound, etc. are used individually or in mixture.

In the present invention, since only the ultraviolet curable resin is used as the alignment film resin, it is preferable to use only the ultraviolet curable curing agent for the curing agent. In addition, it is preferable to adjust and select the type, size, content, etc. of the curing agent according to the type, physical and chemical properties of the curable resin to be used.

Isocyanate compounds in the present invention are trimethylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, diphenylmethane isocyanate, xylene diisocyanate aromatic diisocyanate compounds such as diisocyanate, aliphatic diisocyanate such as hexamethyl diisocyanate, and the like are 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.

The curing agent used to form the alignment film of the present invention is preferably used 0.1% to 10% by weight, more preferably 0.5% to 5% by weight relative to 100% by weight of the alignment film coating solution.

In the present invention, the curing agent is an additive used to control the molecular weight or the chain structure of the alignment layer coating composition. When the curing agent is used in the above-described range, the effect of suppressing phase separation and the like is prominent. When the content of the curing agent is less than 0.1% by weight, it is difficult to expect the function of the curing agent, and when the content of the curing agent is greater than 10% by weight, the content of the curable resin is relatively low, making it difficult to increase hardness.

In addition, the solvent used in the alignment film coating step may be suitably mixed with the alignment film coating composition (composition comprising a alignment film resin and a curing agent). A representative example is Iso Propyl Alcohol (IPA).

The viscosity of the solution containing the alignment film resin is preferably 1 cps to 500 cps. When the viscosity is 1 cps or less, the thickness of the alignment film to be manufactured may be controlled to be thin. However, the hardness of the alignment film may be lowered, which may be insufficient to function the alignment film. It is difficult to control the thickness, and a problem arises in that a part of the film becomes thick.

2) Alignment layer drying step

In the alignment film drying step, a process of drying the polarizing film coated with the alignment film uniformly in step 1) is performed. That is, in the alignment film drying step, the solvent applied in the alignment film coating step is volatilized.

The drying temperature performed in the drying step is preferably 20 ° C to 70 ° C, more preferably 25 ° C to 60 ° C. If the drying temperature is lower than 20 ° C, it takes longer to remove the solvent, and if the drying temperature is higher than 70 ° C, the physical properties of the alignment layer may be affected.

In addition, the drying time is preferably about 30 seconds to about 400 seconds. More preferably 55 to 200 seconds, still more preferably 60 to 100 seconds. If the drying time is less than 30 seconds, the effect of drying does not appear properly, and drying for more than 400 seconds may affect the physical properties.

3) Alignment film curing step

In the alignment film curing step, an alignment film layer is formed by applying UV light to the alignment film dried in the step 2).

The UV curing step is performed to completely adhere the dried alignment layer to the polarizing film and to completely remove the solvent that could not be removed in the drying process.

In addition, the energy range of UV is preferably 250mJ / cm ² to 600mJ / cm ² . If the amount of energy irradiation is 250mJ / cm ² or less, sufficient curing effect does not appear, if the 600mJ / cm ² or more may affect the physical properties of the alignment layer.

The curing time is relatively determined corresponding to the energy irradiation amount of UV, the curing time is preferably 45 seconds to 130 seconds. If the curing time is 45 seconds or less, the effect of curing does not appear sufficiently. If the curing time is 130 seconds or more, the physical properties and durability of the alignment film may be affected, thereby degrading the function of the alignment film. The above-mentioned ultraviolet curing uses ultraviolet rays emitted from light sources such as ultra high temperature mercury lamp, high pressure mercury lamp, low pressure mercury lamp, carbon arc, xenon arc, metal halide lamp and the like.

It is preferable to form the said oriented film so that the thickness may be set to 0.01 micrometer-5 micrometers. More preferably, they are 0.05 micrometer-3 micrometers. If the thickness is thicker than 5 μm, the thickness of the IPS compensation film becomes thicker than necessary, and if the thickness is thinner than 0.01 μm, the nematic liquid crystal, which will be described later, cannot be properly aligned, and thus the IPS-LCD compensation cannot be properly performed. have.

(2) rubbing

In the rubbing step, the alignment film formed in the step (1) is passed through the rubbing device to perform a process of helping to orient the surface in a predetermined direction. Although the rubbing step is not particularly limited, it is preferable that the process is smooth since it affects the orientation and uniformity of the liquid crystal compound later. In the rubbing treatment performed in the rubbing step, for example, a rubbing roll is manufactured by attaching a velvet-shaped cloth in which fibers such as lenyon, nylon, cotton, and aramid are attached to a roll, and the organic material is coated in a state where the roll is rotated at high speed. How to treat the surface. Or a rubbing process can be performed by carrying out high speed rotation in the state which fixed the rubbing roll, and conveying a film, making contact with a rubbing roll. Conditions for rubbing treatment include the type of polymer film or plastic film or cloth to be used, the diameter of the rubbing roll or the rotation speed and rotation direction of the rubbing roll, the moving speed of the polymer film or rubbing roll, and the pressure of the rubbing roll to the polymer film. It is set differently according to the degree. The rubbing is preferably processed to have a vertical alignment of the liquid crystal to be described later. Due to the rubbing treatment in the above direction, the liquid crystal layer to be described below serves as a positive C plate.

(3) liquid crystal layer forming step

In the present invention, the liquid crystal layer forming step is performed by coating, drying, and curing the liquid crystal layer by an in-line coating method on the alignment film rubbed in the rubbing step.

1) Liquid Crystal Layer Coating Step

Coating heads used in the in-line coating method of the present invention is, for example, knife (Knife), comma (Comma), die (Die), micro gravure, gravure, nip (nip), spray and the like. In-line coating as in the present invention eliminates or minimizes the fine voiding phenomenon caused by using the coating heads listed above. In addition, air filling the voids can cause a change in the refractive index and scatter the light to reduce the overall transmittance.

Nematic liquid crystals are liquid crystals that have an order of orientation in the direction assuming the molecular axis, although there is no regularity in the molecular position. Nematic liquid crystals are generally ferroelectric because the polarization is canceled because the directions of molecules are almost equal to up and down. Indicates.

The liquid crystal layer coating step may be coated on the alignment layer by an inline coating method in the form of a solution (hereinafter 'liquid crystal coating solution') in which the liquid crystal composition containing the nematic liquid crystal is dissolved in a solvent.

It is preferable that the nematic liquid crystal used has vertical alignment property. As one example, liquid crystals exhibiting homeotropic molecular arrangements are preferred. In addition, the use of a curable nematic liquid crystalline polymer in which a predetermined amount of an optically active component is added to a liquid crystalline polymer capable of easily fixing its alignment state (the monomer form becomes a polymer form after the curing step described later). desirable. The reason for using the curable nematic liquid crystal is that it should be used as a compensation film.

As the optically active component, any one can be used as long as it exhibits optical activity, but it is preferable to use an optically active polymer compound or a polymer composition. As long as it has an optically active group in a molecule | numerator, all can be used, It is preferable from a viewpoint of compatibility with the said liquid crystalline polymer that it is an optically active liquid crystalline high molecular compound or a liquid crystalline polymer composition. Examples of the liquid crystalline polymers include polyacrylates, polymethacrylates, polymalonates, polysiloxanes, polyesters, polyamides, polyesteramides, polycarbonates, polypeptides, celluloses, and compositions based on these liquid crystalline polymers. Can be. Especially, the liquid crystalline polyester which is optically active of an aromatic principal is contained as a preferable example.

Moreover, as a liquid crystalline polymer which has an optically active group in a molecule | numerator, Polyacrylate which has optically active group in the side chain of polyester, polyimide, polyamide, polycarbonate, polyesterimide, or a polymer which has an optically active group in a polymer main chain, Polymethacrylate, polymalonate, polysiloxane, etc. are mentioned as an example. Among them, liquid crystal polyesters having good orientation and relatively easy synthesis are preferred. Examples of the structural unit of the polymer include aromatic or aliphatic diol units, aromatic or aliphatic dicarboxylic acid units, and aromatic or aliphatic hydroxycarboxylic acid units.

In addition, as a solvent used to dissolve the liquid crystal composition including the nematic liquid crystal, halogenated hydrocarbons such as chloroform, dichloroethane, tetrachloroethane, trichloroethylene, tetrachloroethylene and o-dichlorobenzene, and Mixed solvents with phenols, kentones, ethers, dimethylformamide, dimethylacetamide, dimethyl sulfoxide, N-methylpyrrolidone, sulfolane, cyclohexanone, xylene, toluene and the like.

The content of the liquid crystal composition is preferably 15% by weight to 60% by weight, more preferably 20% by weight to 40% by weight in 100% by weight of the liquid crystal coating solution.

If the content of the liquid crystal composition is less than 15% by weight, the desired viewing angle compensation function cannot be performed properly. If the content of the liquid crystal composition is more than 60% by weight, the liquid crystal composition is contained more than necessary, which makes the control of the process difficult and economical. have.

In addition, the optically active component is preferably 5 parts by weight to 15 parts by weight with respect to 100 parts by weight of the nematic liquid crystalline polymer. More preferably, they are 8 weight part-13 weight part. If the content of the optically active ingredient is 5 parts by weight or less, the optically active function cannot be properly performed, and more than 15 parts by weight is meaningless because there is no difference in effect.

In addition, the liquid crystal coating solution preferably has a viscosity of 1 cps to 600 cps, more preferably 10 cps to 450 cps. Even more preferred is 50cps to 300cps.

When the viscosity of the liquid crystal coating solution is less than 1 cps, it is difficult to easily apply the liquid crystal coating solution due to the low adhesive strength. When the viscosity of the liquid crystal coating solution is larger than 600 cps, the adhesive force is too large to control the process.

2) drying step

The drying step is performed to remove the solvent applied to the liquid crystal layer in the liquid crystal layer coating step.

The drying temperature performed in the drying step is preferably 15 ℃ to 60 ℃, more preferably 25 ℃ to 55 ℃. If the drying temperature is lower than 15 ° C, it takes longer to remove the solvent, and if the drying temperature is higher than 60 ° C, the physical properties of the liquid crystal layer may be affected.

Moreover, as for drying time, about 15 second-about 300 second are preferable. More preferably 55 to 200 seconds, still more preferably 60 to 100 seconds. If the drying time is less than 15 seconds, the effect of drying does not appear properly, and drying for more than 300 seconds may affect the physical properties.

3) liquid crystal layer curing step

In the liquid crystal layer curing step, ultraviolet light (UV) is applied to the liquid crystal layer dried in the drying step to form a liquid crystal layer.

The hardening of the liquid crystal layer is performed to completely attach the dried liquid crystal layer to the alignment layer and to completely remove the solvent that may not be removed in the drying process.

In addition, the energy range of UV is preferably 250mJ / cm ² to 600mJ / cm ² . If the amount of energy irradiation is 250mJ / cm ² or less, sufficient curing effect does not appear, if the 600mJ / cm ² or more may affect the physical properties of the alignment layer.

The curing time is relatively determined corresponding to the energy irradiation amount of UV, the curing time is preferably 45 seconds to 130 seconds. If the curing time is 45 seconds or less, the effect of curing does not appear sufficiently. If the curing time is 130 seconds or more, the physical properties and durability of the liquid crystal layer may be affected, thereby degrading the function of the liquid crystal layer. The above-mentioned ultraviolet curing uses ultraviolet rays emitted from light sources such as ultra high temperature mercury lamp, high pressure mercury lamp, low pressure mercury lamp, carbon arc, xenon arc, metal halide lamp and the like.

The liquid crystal layer is preferably formed to have a thickness of 0.01 μm to 20 μm. More preferably, they are 1 micrometer-10 micrometers. If the thickness of the liquid crystal layer is thinner than 0.01㎛ it is difficult to perform the desired viewing angle compensation function, if the thickness is more than 20㎛ has a disadvantage of thickening the viewing angle compensation film.

The structural diagram of the compensation film for IPS using the nematic liquid crystal produced through the above process is shown in FIG. As shown, the compensation film for the IPD using the nematic liquid crystal is an alignment film 200 is coated on the transparent support 300, the liquid crystal layer 100 containing the nematic liquid crystal is coated thereon. Accordingly, the IPS compensation film using the nematic liquid crystal shown in FIG. 1 has the same rough structure as the IPS compensation film by the conventional stretching method, but the manufacturing process becomes simpler and thinner. The liquid crystal layer 300 serves as a positive C plate.

Hereinafter, the present invention will be described in more detail with reference to the following examples, but the following examples are only examples of the present invention and the present invention is not limited to these examples.

Example 1

1) As alignment film resin, it is a polyfunctional acrylate type and polyfunctional methacrylate type | mold oriented film resin, dipentaacryloyl acrylate (Kayard D-310 by Nippon Kayaku Co., Ltd.) and pentaerythritol triacrylate (Nippon Kayakku) Manufacture Kayarad PET-30), 35% by weight of the alignment film resin mixed with a weight ratio 9: 1, trimethylene diisocyanate 3% by weight as a curing agent, and the above mixed composition (alignment film resin + curing agent) to isopropyl alcohol It was dissolved, coated in the form of a solution on the TAC film by the in-line coating method, dried and UV cured to form an alignment film with a thickness of 3㎛. The drying was carried out at 25 ° C., and for 1 minute. Curing was performed by irradiation with 300mJ / cm ² UV.

2) The alignment film was subjected to a rubbing treatment (rubbing treatment with a cloth) of the transparent support in the longitudinal direction.

3) As a liquid crystal, coating was performed using a nematic curable liquid crystal solution (Merck's RMS04-015). The nematic curable liquid crystal solution (Merck's RMS04-015) is one in which 33% by weight of the nematic liquid crystal is dissolved in xylene (liquid crystal coating solution). The liquid crystal coating solution was coated on the alignment layer by an in-line coating method and dried at 25 ° C. for 1 minute, followed by ultraviolet curing with an energy of 300 mJ / cm ² to form a liquid crystal layer, but compensated for the thickness of the liquid crystal layer to be 1 μm. A film was prepared.

Example 2

The viewing angle compensation film was manufactured under the same conditions as in Example 1 except that the thickness of the liquid crystal layer was increased to 1.5 μm.

Example 3

The viewing angle compensation film was manufactured under the same conditions as in Example 1 except that the thickness of the liquid crystal layer was increased to 2 μm.

Comparative Example 1

TAC film, which is a transparent support, was used.

Table 1 shows the refractive indices, refractive index correlations, and thickness direction phase differences of the compensation films obtained in Examples 1, 2, 3, and Comparative Example 1.

Item Nx Ny Nz Refractive index correlation Thickness Direction Retardation (Rth) ㅣ Nz-Nx ㅣ Example 1 1.62406 1.62406 1.62345 Nx = Ny> Nz -49.2 0.00061 Example 2 1.67114 1.67114 1.67146 Nx = Ny <Nz -27.6 0.00032 Example 3 1.65707 1.65707 1.65765 Nx = Ny <Nz  46.9 0.00058 Comparative Example 1 1.55555 1.55554 1.55475 Nx = Ny> Nz -64.0 0.0008

(Nx means the refractive index in the x-axis, Ny means the refractive index in the y-axis, and Nz means the refractive index in the z-axis.)

The refractive index correlations of the compensation films obtained in Examples 1, 2, and 3 are the same, whereas in Comparative Example 1, the correlations are different. That is, through Table 1, TAC (Comparative Example 1) has the characteristics of the negative C plate, but it can be seen that the physical properties change from negative to positive as the vertically aligned liquid crystal is coated (Examples 1 to 3) have.

2 to 3 are graphs showing the change in phase difference according to the inclination angle with respect to the phase axis of the compensation films obtained in Examples 1 and 2, and FIG. 4 is a phase difference according to the inclination angle with respect to the phase axis of the TAC film obtained in Comparative Example 1. Graph showing change.

As shown, the graph shown in FIG. 3 shows the smallest phase difference change, followed by the graph shown in FIG. 2 and the graph shown in FIG. 4 show the largest phase difference change. This means that the thinner the film thickness, the larger the phase difference change.

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 deemed to be within the scope of the claims underlying the present invention to the extent possible for various modifications.

In addition, the preferred range, more preferred range, and even more preferred range limitation in the present invention are intended to maximize the effect even more, and more satisfactory technical effects can be obtained by narrowing the limited range.

As described above, the method for producing a compensation film for IPS using the nematic liquid crystal according to the present invention and the compensation film prepared by the method by forming an alignment layer on the transparent support and coating the nematic liquid crystal, + C-plate It can be formed as a thin film while functioning as a compensation film.

In addition, there is an advantage that the complexity of the process can be solved by using an in-line coating method without using the stretching method.

Claims (10)

(a) In 100 weight% of the orientation film coating solution which mixed the orientation film coating composition comprised including the orientation film resin and a hardening | curing agent in the solvent, Iii) 15 wt% to 55 wt% of the alignment film resin Ii) the curing agent is an alignment film forming step of coating the alignment film coating solution mixed at 0.1% by weight to 10% by weight according to the in-line coating method on the transparent support, drying, ultraviolet curing to form an alignment film; (b) a rubbing step of rubbing the alignment film formed in the step in the longitudinal direction of the transparent support made of a triacetyl cellulose (TAC) film; And (c) a liquid crystal layer forming step of coating a liquid crystal coating solution in which the nematic liquid crystal is mixed at 15% by weight to 60% by weight on the rubbed alignment layer by an inline coating method, and drying and UV curing to form a liquid crystal layer. Is done by The nematic liquid crystal has a vertical alignment, and a curable nematic liquid crystal polymer in which an optically active component is added to the liquid crystal polymer is used. Method of producing a compensation film for IPS using a nematic liquid crystal, characterized in that from 15 parts by weight to 15 parts by weight. delete The method of claim 1, The alignment film resin in the step (a) is a nematic liquid crystal, characterized in that at least one of unsaturated polyester resin, polyfunctional acrylate resin, polyfunctional methacrylate, urethane acrylate, epoxy acrylic resin, epoxy acrylate resin Method for producing a compensation film for IPS using. delete The method of claim 1, The nematic liquid crystalline polymer of step (c) is at least one of polyacrylate, polymethacrylate, polymalonate, polysiloxane, polyester, polyamide, polyesteramide, polycarbonate, polypeptide, cellulose Method of producing a compensation film for IPS using a nematic liquid crystal. The method of claim 1, The viscosity of the alignment film coating solution of the step (a) is the manufacturing method of the compensation film for IPS using a nematic liquid crystal, characterized in that 1cps to 500cps. The method of claim 1, The viscosity of the liquid crystal coating solution of the step (c) is the manufacturing method of the compensation film for IPS using a nematic liquid crystal, characterized in that 1cps to 600cps. The method of claim 1, The liquid crystal layer formed in step (c) has a thickness of 0.01㎛ to 20㎛ manufacturing method of the IPS compensation film using a nematic liquid crystal, characterized in that the coating. The method of claim 1, The solvent used in the step (c) is a halogenated hydrocarbon such as chloroform, dichloroethane, tetrachloroethane, trichloroethylene, tetrachloroethylene, O-dichlorobenzene, mixed solvent of these and phenols, kentones, ethers , Dimethylformamide, dimethylacetamide, dimethyl sulfoxide, N-methylpyrrolidone, sulfolane, cyclohexanone, xylene, toluene, characterized in that the preparation of a compensation film for IPS using a nematic liquid crystal Way. delete

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