JP5189888B2 - Method for producing retardation layer - Google Patents

Description

The present invention relates to a method for producing a retardation layer used for a display element such as a liquid crystal display device.

  In recent years, there has been a high demand for flat panel displays such as liquid crystal display elements, and optical elements are not only linear polarizing plates but also used in combination with various retardation plates for the purpose of improving display contrast and widening the viewing angle. Is increasing. Such an optical element is generally bonded to the surface of the substrate constituting the liquid crystal cell on the side opposite to the liquid crystal using an adhesive.

  As such a retardation control layer, a retardation control film obtained by stretching a polycarbonate film or the like in a predetermined direction, or a liquid crystal material having birefringence anisotropy is applied to a triacetyl cellulose film or the like. The obtained retardation control film is used.

  These films are used by laminating and laminating to a linearly polarizing plate, or by laminating the laminated ones on a substrate, but the adhesive layer used for the affixing may cause light reflection, Desired optical characteristics cannot be obtained. Further, the thickness of the retardation layer cannot be ignored optically.

  In view of these problems, the display disclosed in Patent Document 1 discloses a technique in which a phase difference control layer made of a liquid crystal polymer is stacked on a color filter layer that is a constituent member of a liquid crystal panel.

JP 2005-24919 A

  However, in the technique disclosed in Patent Document 1, it is necessary to form an alignment film under the liquid crystal layer in order to align the liquid crystal polymer used as the retardation control layer in a predetermined direction. The alignment film can be formed by applying a rubbing that rubs in a predetermined direction with a roll wrapped with a cloth after applying a resin composition in which polyamide resin or polyimide resin is dissolved and dried. .

  In the technique disclosed in Patent Document 1, a photopolymerizable liquid crystal composition in which a liquid crystal polymer is dissolved is applied by a coating method typified by spin coating, and this is irradiated with ionizing radiation for polymerization. A phase difference control layer is formed.

  Therefore, the process of forming the phase difference control layer becomes complicated. In particular, the rubbing causes the cloth to come into contact with the substrate and rubs, so that there is a problem that the product or the production line is contaminated by particles such as cloth waste generated at that time.

An object of the present invention is to solve the conventional problems and provide a method for producing a retardation layer capable of forming a retardation layer without providing an alignment film on a substrate.

In the present invention, a resin layer treated so that liquid crystal molecules are aligned is provided on the surface of the blanket, and a coating liquid containing a photopolymerizable liquid crystal is applied to the surface of the resin layer, and ionizing radiation is applied thereto. After the irradiation, the phase difference layer is transferred onto a substrate.

In the present invention, a resin layer treated so that liquid crystal molecules are aligned is provided on the surface of the blanket, and a coating liquid containing a photopolymerizable liquid crystal is applied to the surface of the resin layer, and ionizing radiation is applied thereto. Is then transferred onto a substrate using a printing machine.

In the present invention, a resin layer treated so that liquid crystal molecules are aligned is provided on the surface of the blanket, and a coating liquid containing a photopolymerizable liquid crystal is applied to the surface of the resin layer, and ionizing radiation is applied thereto. , And after removing unnecessary portions with a printing plate, it is transferred onto a substrate.

In the present invention, a resin layer treated so that liquid crystal molecules are aligned is provided on the surface of the blanket, and a coating liquid containing a photopolymerizable liquid crystal is applied to the surface of the resin layer, and ionizing radiation is applied thereto. , And after removing unnecessary portions with a printing plate, the layer is transferred onto a substrate using a printing machine.

In the invention, it is preferable that the resin layer is processed so that liquid crystal molecules are aligned by rubbing.

According to this invention, the resin layer processed so that a liquid crystal molecule may orientate is provided in the surface of a blanket. And once a coating liquid is apply | coated to the surface of a resin layer, a liquid crystal molecule is orientated on the resin layer surface, an ionizing radiation is irradiated, and an orientation state is hold | maintained. Then, it transfers on a board | substrate and obtains a phase difference layer.

  Accordingly, the retardation layer can be formed without providing an alignment film on the substrate. Therefore, the retardation layer can be easily formed and the thickness of the optical element including the retardation layer can be reduced.

According to the present invention, the resin layer treated so that liquid crystal molecules are aligned is provided on the surface of the blanket. And once a coating liquid is apply | coated to the surface of a resin layer, a liquid crystal molecule is orientated on the resin layer surface, an ionizing radiation is irradiated, and an orientation state is hold | maintained. Then, it transfers on a board | substrate using a printing machine, and obtains a phase difference layer.

  Accordingly, the retardation layer can be formed without providing an alignment film on the substrate. Therefore, the retardation layer can be easily formed and the thickness of the optical element including the retardation layer can be reduced. Further, transfer to the substrate can be performed more easily by using a printing machine.

According to the present invention, the resin layer treated so that liquid crystal molecules are aligned is provided on the surface of the blanket. And once a coating liquid is apply | coated to the surface of a resin layer, a liquid crystal molecule is orientated on the resin layer surface, an ionizing radiation is irradiated, and an orientation state is hold | maintained. Then, after removing an unnecessary part with a printing plate, it transfers on a board | substrate and obtains a phase difference layer.

  Accordingly, the retardation layer can be formed without providing an alignment film on the substrate. Therefore, the retardation layer can be easily formed and the thickness of the optical element including the retardation layer can be reduced. Furthermore, a retardation layer having a pattern shape can be formed by removing unnecessary portions with a printing plate.

According to the present invention, the resin layer treated so that liquid crystal molecules are aligned is provided on the surface of the blanket. And once a coating liquid is apply | coated to the surface of a resin layer, a liquid crystal molecule is orientated on the resin layer surface, an ionizing radiation is irradiated, and an orientation state is hold | maintained. Then, after removing an unnecessary part with a printing plate, it transfers on a board | substrate using a printing machine, and obtains a phase difference layer.

  Accordingly, the retardation layer can be formed without providing an alignment film on the substrate. Therefore, the retardation layer can be easily formed and the thickness of the optical element including the retardation layer can be reduced. Furthermore, a retardation layer having a pattern shape can be formed by removing unnecessary portions with a printing plate. Further, transfer to the substrate can be performed more easily by using a printing machine.

  Further, according to the present invention, since the resin layer is processed so that the liquid crystal molecules are aligned by rubbing, stronger alignment can be imparted.

Also to have a retardation layer produced by the production method of the retardation layer of the present invention, variations in the optical characteristics is small in the display surface, a color filter having stable characteristics can be obtained.

  FIG. 1 is a process diagram showing a method for manufacturing a color filter. The color filter manufacturing method includes a black matrix forming step (step s1) for forming a black matrix on the substrate, and a colored pixel forming step (step s2) for forming colored pixels in the openings of the black matrix formed on the substrate. And a retardation layer forming step (step s3) of forming a retardation layer using a photopolymerizable liquid crystal on a color filter layer composed of a black matrix and colored pixels.

  FIG. 2 is a cross-sectional view showing the configuration of the color filter 1. The color filter 1 is formed on a substrate 2 as a laminate in which a color filter layer 4, an overcoat layer 5, and a retardation layer 6 composed of a black matrix 3B and colored pixels 3C are laminated in this order. Each process and material will be described below.

[Black Matrix Formation Step (Step s1)]
In this step, a black matrix 3B is formed on the substrate 2. As the substrate 2, an inorganic substrate such as glass, silicon or quartz, or an organic substrate as listed below is used. That is, as an organic substrate, acrylic resin such as polymethyl methacrylate, polyamide resin, polyacetal resin, polybutylene terephthalate, polyester resin such as polyethylene terephthalate and polyethylene naphthalate, cellulose resin such as triacetyl cellulose, syndiotactic・ Styrene resins such as polystyrene, polyphenylene sulfide resins, polyether ketone resins, polyether ether ketone resins, fluorine resins, polyether nitrile resins, polycarbonate resins, modified polyphenylene ether resins, polycyclohexene resins, norbornene resins, polysulfone resins , Polyethersulfone resin, polysulfone resin, polyarylate resin, polyamideimide resin, polyetherimide Fat, such as a thermoplastic polyimide resin, made of a common plastic can be used. Although there is no limitation in particular in the thickness of a board | substrate, the thing of about 5 micrometers-1 mm is preferable according to a use, for example.

  The black matrix 3B is used to prevent the leakage of light (light shielding) by blackening the periphery of each dot (pixel) of RGB (red, green, and blue colorants) in a colored pixel, which will be described later, like a window frame. It also plays a role in improving and preventing color mixing during manufacturing. In terms of characteristics, it is preferable that the reflectance is low and the color is pure black and the processing (for example, etching processing) is easy. The black matrix 3 forms a pattern corresponding to the non-pixel portion and forms an opening corresponding to the pixel portion.

  The black matrix 3B preferably includes a resin composition containing a black colorant. A paint-type resin composition is applied to one surface of the substrate 2 and once solidified, a resist is applied, resist exposure, resist development, resin composition etching, and resist removal are performed to form a desired pattern. be able to. Alternatively, a pattern can be formed by applying a photosensitive resin composition of a paint type containing a black colorant, and exposing the photosensitive resin composition and developing the photosensitive resin composition. In addition, the black matrix 3B can be formed by a printing method using a black ink composition.

  Alternatively, the black matrix 3B is a two-layer chrome black matrix having a laminated structure of chromium oxide (CrOx) / chromium (Cr) (x is an arbitrary number, “/” represents a laminated layer), or further reduces the reflectance. Alternatively, it may be a three-layer chromium black matrix having a laminated structure of chromium oxide (CrOx) / chromium nitride (CrNy) / chromium (Cr) (x and y are arbitrary numbers, “/” represents a laminated structure). A thin film of metal, metal oxide, or metal nitride is formed on the substrate 2 as required by various methods such as vapor deposition, ion plating, or sputtering, and a pattern is formed by photolithography or electroless plating. can do.

  The thickness of the black matrix 3B is preferably about 0.5 to 2 μm for the resin black matrix and about 0.2 to 0.4 μm for the chrome black matrix.

[Colored Pixel Formation Step (Step s2)]
In this step, the colored pixels 3C are formed in the openings of the black matrix 3B formed on the substrate 2.

  Each colored pixel 3C of the color filter layer 4 may be provided for each opening of the black matrix 3B, but for convenience, it is provided in a band shape from the front side to the back side in FIG. It may be a thing. Further, the shape of the opening may be any of a stripe shape, a dot shape, or a deformed shape thereof. The colored pixel 3C is a photo printing method in which an ink composition colored in a predetermined color is prepared and printed for each color pattern, or a paint type photosensitive resin composition containing a colorant of a predetermined color is used. It can be formed by a lithography method. In particular, it is preferably formed by a photolithography method. A color filter layer 4 is constituted by the black matrix 3B and the colored pixels 3C, and the thickness of the color filter layer 4 is preferably about 1 μm to 5 μm.

  Moreover, you may form the overcoat layer 5 on the color filter layer 4 as needed. The overcoat layer 5 is preferably a transparent protective film including an acrylic resin, and the thickness is preferably 1 to 3 μm. The overcoat layer 5 may be formed so as to cover the entire surface of the color filter layer 4, or may be patterned and partially formed.

[Phase difference layer forming step (step s4)]
In this step, the retardation layer 6 is formed on the color filter layer 4. When the overcoat layer 5 is formed, the retardation layer 6 is formed on the overcoat layer 5.

  The retardation layer 6 is formed by applying a coating liquid containing a photopolymerizable liquid crystal to the surface of a resin layer treated so that liquid crystal molecules are aligned, and irradiating it with ionizing radiation. 5 or the color filter layer 4 is formed by transferring. The thickness of the formed retardation layer 6 is preferably 0.5 to 4.0 μm.

<Photopolymerizable liquid crystal>
The photopolymerizable liquid crystal is not particularly limited as long as it is a polymerizable liquid crystal capable of forming a liquid crystal phase having nematic regularity or smectic regularity, but a nematic liquid crystal material can be preferably used. Among the nematic liquid crystals, nematic liquid crystals having two or more polymerizable groups in the liquid crystal molecules can be preferably used.

  In the photopolymerizable liquid crystal, a polymerizable monomer molecule, a polymerizable oligomer molecule, a polymerizable polymer molecule, or the like may be used alone, or two or more of these may be mixed and used. An example of a commercially available material is LC242 (trade name, manufactured by BASF).

<Other ingredients>
The coating liquid containing the photopolymerizable liquid crystal preferably includes a photopolymerization initiator. As the photopolymerization initiator, a radical polymerizable initiator can be preferably used. A radically polymerizable initiator generates free radicals by energy such as ultraviolet rays. Commercially available photopolymerization initiators can also be used. For example, Irgacure 184, Irgacure 369, Irgacure 651, Irgacure 819, Irgacure 907 (all trade names, manufactured by Ciba Specialty Chemicals Co., Ltd.) and the like can be suitably used.

  The photopolymerization initiator is preferably added in a range that does not significantly impair the liquid crystal regularity of the photopolymerizable liquid crystal. The addition amount of the photopolymerization initiator is generally 0.01 to 15% by mass, preferably 0.1 to 12% by mass, more preferably 0.5 to 10% based on the amount of the photopolymerizable liquid crystal. It is the range of mass%.

  In the coating liquid containing the photopolymerizable liquid crystal, a sensitizer can be added in addition to the photopolymerization initiator as long as the object of the present invention is not impaired.

  Furthermore, it is preferable that the coating liquid containing a photopolymerizable liquid crystal contains a surfactant. By containing the surfactant, the uniformity of the coating film can be improved and the liquid crystal alignment at the air interface can be controlled.

  The surfactant is not particularly limited as long as it does not impair the liquid crystal expression of the photopolymerizable liquid crystal. For example, nonionic surfactants such as polyoxyethylene alkyl ether and polyoxyethylene alkyl allyl ether, fatty acid salt, alkyl sulfate ester salt, alkylbenzene sulfonate, alkyl naphthalene sulfonate, alkyl sulfosuccinate, alkyl diphenyl ether disulfonate Salt, alkyl phosphate, polyoxyethylene alkyl sulfate ester salt, naphthalene sulfonic acid formalin condensate, special polycarboxylic acid type polymer surfactant, anionic surfactant such as polyoxyethylene alkyl phosphate ester, etc. Can be mentioned. Moreover, you may add an acrylic oligomer, an acrylic polymer, etc.

  The addition amount of the surfactant is generally 0.01 to 1% by mass, preferably 0.05 to 0.5% by mass based on the amount of the photopolymerizable liquid crystal.

  The photopolymerizable liquid crystal and each of the above components can be dissolved in a solvent to obtain a coating solution. The solvent that can be used is not particularly limited as long as it can dissolve the photopolymerizable liquid crystal and each component, and an organic solvent can be preferably used. In order to form a coating film uniformly, 3-methoxybutyl acetate, diethylene glycol dimethyl ether, propylene glycol monomethyl ether acetate, cyclohexanone, etc. can be used suitably as a solvent.

<Transfer printing>
The coating liquid obtained as described above is once applied to the resin layer, and then transferred onto the substrate 2, whereby the retardation layer 6 is printed.

  FIG. 3 is a diagram illustrating an example of a transfer printing process. Application of the coating liquid to the resin layer and transfer of the applied coating liquid to the substrate 2 are realized by a known printing technique as a series of steps. Printing is performed on the substrate 2 that is the printing object using the coating liquid like printing ink. As the printing method, for example, letterpress printing, intaglio printing, planographic printing, flexographic printing, gravure printing, offset printing and the like can be used.

<Blanket>
In offset printing, the blanket 10 is used. A coating solution is once applied to the resin layer on the blanket surface. As the material of the resin layer on the blanket surface, polyethylene terephthalate resin, polyamide resin, polyimide resin or the like can be used. Generally, silicon rubber or the like is used as a material in offset printing as a material, but in this case, in order to use it as a resin layer for aligning liquid crystal, polyethylene terephthalate resin, polyamide resin, polyimide resin or the like is used. Is desirable.

  In the conventional technique, an alignment film is provided on a substrate, and a coating liquid is applied on the alignment film to align liquid crystal molecules. In the present invention, liquid crystal is used on the resin layer on the blanket surface instead of the alignment film. The molecules are oriented and printed on the substrate.

<Rubbing>
For example, if the resin layer on the blanket surface is obtained by stretching in a predetermined direction, liquid crystal molecules can be aligned without rubbing treatment, but it is aligned at a predetermined angle with a predetermined strength. In some cases, the surface of the resin layer is preferably rubbed. A known technique can be used as the rubbing method.

  A resin layer such as polyethylene terephthalate resin is wound around a stainless steel roll, and the surface of the resin layer is rubbed in a predetermined direction by a rubbing roller 11 or the like wound with a cloth such as rayon. it can. The blanket 10 having the resin layer with the surface rubbed thus obtained can be repeatedly used in a plurality of transfer printing steps, and the rubbing treatment on the surface of the resin layer can be omitted after the second time.

<Application of polymerizable liquid crystal composition>
A blanket 10 is coated with a coating solution in which the polymerizable liquid crystal composition is dissolved in a solvent. A known technique can be used for the coating method. That is, the coating liquid can be applied by a die coating method using the slit nozzle 12, a roll coating method, a gravure coating method, or the like.

<Photocuring>
The blanket 10 coated with the coating liquid containing the photopolymerizable liquid crystal is held at a predetermined temperature at which the photopolymerizable liquid crystal exhibits a liquid crystal structure, and in this state, the coating film is irradiated with ionizing radiation from the radiation source 13. Then, the photopolymerizable liquid crystal is polymerized and cured. The purpose of the irradiation with ionizing radiation is to fix the liquid crystal molecules aligned in a predetermined direction on the blanket 10 so that the alignment is not disturbed after the transfer.

  At this time, if the photopolymerization reaction proceeds too much, there is a problem that the blanket 10 is excessively solidified and is not easily detached from the blanket. For this reason, it is preferable to set an appropriate irradiation amount so that the ionizing radiation can be easily detached from the blanket 10 and transferred to the substrate, and the orientation of the liquid crystal molecules is not greatly disturbed after the transfer.

When using ultraviolet rays as the ionizing radiation depends on the polymerizable combination of liquid crystal and the photopolymerization initiator used, generally irradiation dose 50~2000mJ / cm ^2, preferably 300~1100mJ / cm ^2. The exposure wavelength is preferably about 200 to 450 nm.

<Substrate transfer>
The retardation layer 6 formed on the surface of the blanket 10 is transferred onto the substrate 2. The rotational speed of the blanket 10 is adjusted so that the end of the retardation layer 6 and the end of the transfer region on the substrate 2 are aligned and the retardation layer 6 is transferred to a predetermined position on the substrate 2. The feed rate of the substrate 2 is controlled.

  In order to improve the adhesion between the color filter layer 4 and the retardation layer 6, an adhesive layer (not shown) is provided on the color filter layer 4, and then the retardation layer 6 is formed on the adhesive layer. Also good. When the overcoat layer 5 is formed, an adhesive layer (not shown) may be provided thereon, and then the retardation layer 6 may be formed on the adhesive layer.

FIG. 4 is a diagram illustrating another example of the transfer printing process.
As in the example shown in FIG. 3, the retardation layer 6 may be provided in a shape that covers the entire color filter layer 4 or may be provided in a predetermined pattern shape. In this example, formation of the retardation layer 6 having a pattern shape will be described.

  When the retardation layer 6 having a pattern shape is provided on the substrate 2, for example, a reverse printing method can be used.

  The resin layer on the surface of the blanket 10 is rubbed with a rubbing roller 11 and a coating liquid is applied to the surface of the blanket 10, and then the coating film is irradiated with ionizing radiation from a radiation source 13 to polymerize the photopolymerizable liquid crystal and cure. The steps up to this are the same as in the above example.

  The plate 14 is brought into contact with the coating film obtained after the coating liquid is cured, and a part of the coating film is removed by the convex pattern formed on the plate 14, and the coating film remaining on the blanket 10 surface. Is transferred to the substrate 2 as the retardation layer 6 having a pattern shape.

  As the material of the printing plate, a metal plate can be used. For example, there is a method of using a copper plate coated with chromium to add wear resistance to a copper plate etched.

  The retardation distribution generated by the retardation layer 6 provided as described above is preferably 5% or less.

  By setting such a distribution, it is possible to manufacture the color filter 1 having a stable characteristic with small variations in optical characteristics within the display surface. Further, by using such a color filter 1, it is possible to obtain a display with extremely uniform optical characteristics within the panel surface.

  EXAMPLES The present invention will be specifically described below with reference to examples and comparative examples, but the present invention is not particularly limited as long as it does not exceed the gist thereof. In the following, “parts” and “%” mean “parts by weight” and “% by weight” unless otherwise specified. The retardation (retardation) of the glass substrates with retardation layers in Examples and Comparative Examples was measured as follows.

[Retardation of glass substrate with retardation layer]
The phase difference was measured at a measurement wavelength of 586.5 nm using an ellipsometric apparatus (trade name: KOBRA-WPR, manufactured by Oji Scientific Instruments).

(Example)
<Rubbing treatment>
Using a rayon rubbing cloth on a polyethylene terephthalate resin film with a thickness of 0.5 mm, the surface of the resin film is rubbed under conditions of a roll rotation speed of 500 rpm, a resin film feed speed of 16.7 mm / second, and an indentation amount of 0.15 mm. Processed.

<Preparation of photosensitive resin composition>
The photosensitive resin composition is bis [4- [4- (acryloyloxy) butoxycarbonyloxy] benzoic acid] 2-methyl-1,4-phenylene (trade name: LC-242, manufactured by BASF) as a photopolymerizable liquid crystal. 30 parts, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropan-1-one (trade name: Irgacure 907, manufactured by Ciba Specialty Chemicals Co., Ltd.) as a photopolymerization initiator 0. 9 parts, 0.03 part of an acrylic polymer (trade name: BYK-361N, manufactured by Big Chemie) as an additive and 69 parts of propylene glycol monomethyl ether acetate as a solvent were prepared.

<Formation of coating film>
After applying the prepared photosensitive resin composition to a polyethylene terephthalate resin film by spin coating, the resin film is placed on a hot plate and heated under conditions of a temperature of 60 ° C. and a heating time of 3 minutes to remove the solvent. The liquid crystal structure of the coating film that becomes the phase difference layer was stabilized. Thereafter, the entire surface was irradiated with an ultraviolet ray having a wavelength of 365 nm so that the irradiation dose became 900 mJ / cm ² .

<Transfer of coating film>
A resin film on which a coating film is formed is bonded onto a glass substrate, pressed with a predetermined pressure, and then the polyethylene terephthalate resin film is peeled off, and the retardation layer 6 is transferred onto the glass substrate, thereby the retardation layer 6. The attached glass substrate A was produced.

[Repetitive formation of retardation layer]
By applying the photosensitive resin composition on the peeled polyethylene terephthalate resin film without particularly rubbing, forming a coating film in the same manner as above, and transferring the retardation layer 6 onto another glass substrate. A glass substrate B with a retardation layer 6 was produced.

  Further, the photosensitive resin composition is applied onto the peeled polyethylene terephthalate resin film without performing a rubbing treatment, a coating film is formed in the same manner as described above, and the retardation layer 6 is transferred onto another glass substrate. Thereby, the glass substrate C with the phase difference layer 6 was produced.

(Comparative Example 1)
[Alignment film formation process]
On a glass substrate, a polyimide resin-based alignment film forming ink composition (obtained from Nissan Chemical Co., Ltd.) was formed by spin coating, and baked under conditions of a temperature of 180 ° C. and a heating time of 1 hour. Using a rayon rubbing cloth, the surface was rubbed under the conditions of a roll rotation speed of 500 rpm, a substrate feed speed of 16.7 mm / second, and an indentation amount of 0.15 mm to form an alignment film having a thickness of 1000 mm.

[Phase difference layer forming step]
After applying the photosensitive resin composition A for forming the retardation layer on the alignment film by the slit coating method, the substrate is placed on a hot plate and heated at a temperature of 120 ° C. for a heating time of 3 minutes to remove the solvent. The liquid crystal structure of the retardation layer was stabilized. Thereafter, ultraviolet rays with a wavelength of 365 nm were used to irradiate the entire surface so that the irradiation dose was 1200 mJ / cm ² , and a glass substrate D with a retardation layer serving as a comparative example was obtained.

[Measurement of phase difference and film thickness]
About the Example, when the phase difference of the glass substrate A with the phase difference layer 6 was measured, it was 261.0 nm. The thickness of the retardation layer 6 was 1.98 μm. It was 267.1 nm when the phase difference of the glass substrate B with the phase difference layer 6 was measured. The thickness of the retardation layer was 2.05 μm. It was 273.6 nm when the phase difference of the glass substrate C with the phase difference layer 6 was measured. The thickness of the retardation layer was 1.95 μm.

  About the comparative example, when the phase difference was measured, it was 276.6 nm. The thickness of the retardation layer was 1.97 μm.

It is process drawing which shows the manufacturing method of a color filter. 2 is a cross-sectional view illustrating a configuration of a color filter 1. FIG. It is a figure which shows the example of a transfer printing process. It is a figure which shows the other example of a transfer printing process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Color filter 2 Substrate 3B Black matrix 3C Colored pixel 4 Color filter layer 5 Overcoat layer 6 Retardation layer 10 Blanket 11 Rubbing roller 12 Slit nozzle 13 Radiation source 14 Plate

Claims (5)

A resin layer treated so that liquid crystal molecules are aligned is provided on the surface of the blanket, a coating liquid containing a photopolymerizable liquid crystal is applied to the surface of the resin layer , and this is irradiated with ionizing radiation. A method for producing a retardation layer, which comprises transferring onto a substrate. A resin layer treated so that liquid crystal molecules are aligned is provided on the surface of the blanket, a coating liquid containing a photopolymerizable liquid crystal is applied to the surface of the resin layer , and this is irradiated with ionizing radiation. A method for producing a retardation layer, which comprises transferring onto a substrate using a printing machine. A resin layer treated so that liquid crystal molecules are aligned is provided on the surface of the blanket, and a coating liquid containing a photopolymerizable liquid crystal is applied to the surface of the resin layer , and this is irradiated with ionizing radiation. A method for producing a retardation layer, comprising: removing a portion with a printing plate and then transferring the portion onto a substrate. A resin layer treated so that liquid crystal molecules are aligned is provided on the surface of the blanket, and a coating liquid containing a photopolymerizable liquid crystal is applied to the surface of the resin layer , and this is irradiated with ionizing radiation. A method for producing a retardation layer, comprising: removing a portion with a printing plate, and then transferring the portion onto a substrate using a printing machine.   The method for producing a retardation layer according to claim 1, wherein the resin layer is processed so that liquid crystal molecules are aligned by a rubbing process.

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