KR20110095732A - Method for preparing pattern retarder - Google Patents

Abstract

PURPOSE: A method for preparing pattern retarder is provided to efficiently manufacture a 3D image device with high pattern precision. CONSTITUTION: A lamda/4 phase difference film is transferred by a feeder(S1). An orientation film is formed on the lamda/4 phase difference film(S3). A lamda/2 retardation pattern of the liquid crystal coating layer is formed using a pattern role on the orientation film(S5). The retardation pattern composition for forming the phase difference pattern in printed(S7). A liquid crystal coating layer is formed(S9). The liquid crystal coating layer is heat-hardened(S11).

Description

Manufacturing Method of Patterned Retarder {METHOD FOR PREPARING PATTERN RETARDER}

The present invention comprises the steps of forming an alignment film on the lambda / 4 phase difference film so that the alignment direction is constant; And forming a λ / 2 retardation pattern of the liquid crystal coating layer on the alignment layer with a pattern roll, thereby providing a patterning retarder having high pattern precision, suitable for large size and mass production, and easy to manufacture.

In general, the eyes of a person are about 65 mm apart so that when looking at an object, each eye sees a slightly different side of the object. As a way of recognizing this, there is a slight difference between the shape of an object seen after covering one eye with a palm and the object seen after covering another.

This is called disparity due to the left and right binocular. This difference is synthesized in the brain and perceived as a three-dimensional image. This principle is the basic principle applied to 3D stereoscopic image reproduction.

Three-dimensional stereoscopic imaging techniques can be broadly classified into a binocular parallax (stereoscopic technique) and a compound parallax (autostereoscopic technique). The binocular parallax method uses a parallax image of the left and right eyes having the largest stereoscopic effect, and includes a polarized glasses method and a glasses-free method.

As described in Japanese Patent Application Laid-Open No. Hei 10-232365 and Korean Patent Laid-Open No. 2008-0108034, a three-dimensional stereoscopic image device of polarized glasses is as follows.

The liquid crystal panel having a right eye image area R and a left eye image area L, a polarizing plate disposed on the front of the liquid crystal panel, and a rotation direction of the polarization axes of the right eye image and the left eye image which are disposed on the polarizing plate and pass through the polarizing plate are opposite to each other. And a three-dimensional stereoscopic image device having a patterned retarder that emits with circularly polarized light. In addition, it is provided with a polarizing glasses that allows viewing of the right eye image and the left eye image emitted from the stereoscopic image device as a stereoscopic image (see Fig. 1).

Patterned retarders applied to the three-dimensional stereoscopic imaging apparatus and a manufacturing method thereof are known in various ways. In Japanese Patent Laid-Open No. 10-227998, an alignment film or an alignment film is formed on a sheet of substrate, and the first patterned region is formed by etching, laser irradiation, or sand blasting, and then forming the first patterned region. The patterned retarder is formed by stacking the second patterned region on the first patterned region in the same or different manner.

However, the manufacturing method of the patterned retarder is not only complicated, but also has a disadvantage in that the manufacturing time of the patterned retarder is long and the manufacturing is not easy due to low pattern precision. In addition, productivity was low because the first substrate and the second patterned region were formed on the single substrate.

As described above, the conventional method for manufacturing a patterned retarder is to form a first patterned region and then a second patterned region based on a single substrate, thereby lowering productivity and complicated manufacturing process. But the manufacturing time was long and not easy to manufacture.

Moreover, the pattern precision of the produced patterning retarder was low.

In addition, the three-dimensional stereoscopic image apparatus to which the patterned retarder is applied has recently been required to be enlarged and mass produced.

Accordingly, the present invention is to provide a method for manufacturing a patterned retarder in a process that is simplified for the manufacturing process and suitable for short time mass production.

In addition, the present invention is to provide a three-dimensional stereoscopic image device to which the patterned retarder manufactured by the above method is applied.

1. forming an alignment film on the λ / 4 retardation film such that the alignment direction is constant; And forming a λ / 2 phase difference pattern of the liquid crystal coating layer on the alignment layer using a pattern roll.

2. In the above 1, λ / 4 retardation film is a method of producing a patterned retarder is a sheet of obliquely stretched sheet or a continuous film in which the obliquely stretched film is drawn from the roll.

3. The method according to the above 2, wherein the orientation direction is perpendicular to or parallel to the slow axis of the λ / 4 retardation film.

4. In the above 3, the alignment direction of the patterned retarder manufacturing method is formed by the polarizing electron beam irradiation or rubbing treatment on the alignment film.

5. In the above 1, λ / 2 phase difference pattern is a method of manufacturing a patterned retarder is alternately arranged in a stripe shape of the λ / 2 phase difference region and the liquid crystal coating layer is not formed in the λ / 2 phase difference pattern.

6. In the above 5, the liquid crystal coating layer is a method of manufacturing a patterned retarder containing a reactive liquid crystal compound (RM).

7. In the above 1, the method of manufacturing a patterned retarder using a pressure roll or pressure plate for supporting the alignment film portion is formed in the lambda / 2 phase difference pattern is further below the lambda / 4 phase difference film.

8. according to the above 7, the method for producing a patterned retarder using a transition roll for further transferring the composition for forming a pattern on the pattern roll.

9. The method of claim 1, wherein the pattern formation is performed by a printing method selected from offset, gravure, inverse offset and gravure offset.

10. The method of any one of the above 1 to 9, the method of manufacturing a patterned retarder produced by a roll-to-roll method.

The present invention can provide a method for producing a patterned retarder having high pattern precision, suitable for large size and mass production, and easy to manufacture.

In addition, the present invention can manufacture a polarizing plate laminated with a patterned retarder and a patterned retarder obtained by laminating a polarizer with a roll-to-roll, and thus can be suitably used in a three-dimensional stereoscopic imaging apparatus.

In addition, since the number of steps is reduced compared to the method of further bonding the patterned retarder, it is possible to easily manufacture a three-dimensional stereoscopic image device.

In addition, the present invention in the polarizing plate consisting of a polarizer and a polarizer protective film, when using a patterned retarder as a polarizer protective film it is possible to manufacture a thin three-dimensional stereoscopic imaging apparatus.

Figure 1 shows a three-dimensional stereoscopic image device of the polarizing glasses method,
FIG. 2 shows an apparatus for producing a patterned retarder by a roll to roll method using a continuous gradient stretched film of the present invention,
3 shows step by step a method of manufacturing a patterned retarder of the present invention,
4 shows a patterned retarder made in accordance with the present invention,
5 shows an exemplary gravure-offset printing method according to the invention,
6 shows an exemplary reverse offset printing method according to the present invention.

The present invention comprises the steps of forming an alignment film on the lambda / 4 phase difference film so that the alignment direction is constant; And It relates to a method for producing a patterned retarder comprising the step of forming a pattern roll of the lambda / 2 phase difference pattern of the liquid crystal coating layer on the alignment layer.

Hereinafter, a method of manufacturing a patterned retarder according to an example of the present invention will be described in detail.

2 is an apparatus for producing a patterned retarder by a roll to roll method using a continuous film in which obliquely stretched films are drawn from a roll.

Specifically, a transfer part 11 for unwinding and winding the λ / 4 retardation film 5, an alignment film forming part 1 for forming an alignment film on the λ / 4 retardation film 5, and a liquid crystal coating layer on the alignment film. And a phase difference pattern forming portion 3 formed of a pattern roll. The retardation pattern forming unit 3 includes a composition printing unit 17, a drying unit 19, and a curing unit 21 for retardation pattern formation.

The conveying section may be provided with a first roll 7 for winding the lambda / 4 phase difference film and a second roll 9 for winding the patterned retarder. The first roll and the second roll are preferably connected to a driving source such as a motor and a power transmission member such as a belt or a chain so as to be rotated by receiving a driving force. In addition, it may be provided with an accumulator for controlling the conveying amount of the film according to the guide roll and the process for maintaining the tension and stable film transfer.

The alignment layer forming unit 1 may be provided with a light source capable of aligning the entire region of the alignment layer formed on the λ / 4 retardation film 5 in one direction.

3 is a step-by-step illustrating the manufacturing method of the patterned retarder of the present invention will be described in more detail with reference to this.

(lambda) / 4 phase (s) difference film 5 is conveyed by the conveyance part 11 (S1). In this case, it is preferable that the λ / 4 retardation film 5 is moved in a conventional roll to roll manner. In addition, it is preferable to use a guide roll (not shown) for maintaining the tension and stable film transfer, and an accumulator (not shown) for controlling the feeding amount of the film according to the process.

An oriented film is formed on (lambda) / 4 phase (s) difference film 5 (S3). Formation of the alignment film is carried out by an alignment film applying apparatus, and drying is performed by a drying apparatus as necessary. In addition, this process may be abbreviate | omitted when an orientation film is formed on (lambda) / 4 phase (s) difference film 5 through another alignment film formation process. Orientation in a fixed direction is given by rubbing with a rubbing roll or exposure with polarized light.

A pattern roll is used on the alignment film to form a λ / 2 retardation pattern of the liquid crystal coating layer (S5). (Lambda) / 2 phase difference pattern formation of a liquid crystal coating layer pattern-prints the composition for phase difference pattern formation using a pattern roll on an oriented film (S7). Thereafter, the pattern-printed retardation pattern forming composition is dried to form a liquid crystal coating layer (S9). The liquid crystal coating layer is light / heat cured (S11).

Pattern formation using a pattern roll is not particularly limited, but specifically, one selected from offset printing, gravure printing, reverse-offset printing, and gravure-offset printing may be used. It is preferable to use reverse offset printing or gravure offset printing.

For example, gravure offset printing transfers the ink 34 to the surface of the blanket 32 from the gravure plate or roll 31 on which the line portion is formed as shown in FIG. 5, and then transfers the transferred ink to the printed object 36. It is a method of indirect printing. FIG. 5A illustrates a method of using a gravure plate and FIG. 5B illustrates a method of using a gravure roll. In the case of using a gravure roll, the ink 34 may be continuously supplied to the surface of the blanket 32 using the ink injection portion 35.

The gravure plate or roll 31 may be a convex plate or a concave plate. In the case of a concave plate, the ink is filled in and the non-wire portion is scraped off using a doctor knife or a doctor blade 33.

For example, in reverse offset printing, after the ink 34 is applied to the entire surface of the blanket 32 as shown in FIG. 6, the ink corresponding to the non-pattern is removed on the surface of the gravure plate or the convex plate of the roll 31, and then the blanket ( The pattern on 32) is printed on the printed object 36. FIG. 6A illustrates a method using a gravure plate and FIG. 6B illustrates a method using a gravure roll. The ink injecting portion 35 can be used to continuously supply the ink 34 to the surface of the blanket 32.

Moreover, it is preferable to further use the press roll or the press plate 37 for supporting the orientation film part in which (lambda) / 2 phase difference pattern is formed below a (lambda) / 4 phase difference film. The pressure roll and the pressure plate 37 serve to adjust the printing pressure and limit the fine movement of the film to facilitate the formation of a precise pattern on the lambda / 4 phase difference film.

The lambda / 2 phase difference pattern is printed so that the thickness becomes 0.01 to 10 mu m after drying. A uniform patterned retarder can be easily formed in the thickness range.

The solvent is evaporated through the drying process.

Drying is not particularly limited and can be generally carried out using a hot air dryer or a far infrared heater, the drying temperature is usually 30 to 100 ℃, preferably 50 to 80 ℃, drying time is usually 10 to 600 seconds, preferably 50 to 120 seconds is preferred. In addition, drying may be carried out at the same temperature conditions, or may be performed while raising the temperature step by step.

The dried lambda / 2 phase difference pattern can be produced by light / heat curing, thereby producing the patterned phase difference of the present invention.

Therefore, the patterned retardation of the present invention passes through the region where the retardation delay of light passing through the λ / 4 retardation film and the retardation pattern is -λ / 4 (or 3λ / 4) and the λ / 4 retardation film, and the retardation pattern The regions where the phase difference delay of the light passing through the unformed region is λ / 4 alternately exist. The distance between the regions is formed in the same size.

Although light is not specifically limited, For example, electromagnetic waves, such as an ultraviolet-ray, can be used.

The exposure may be performed while the movement of the patterned retarder is fixed or moved using an accumulator or the like.

In this manner, the lambda / 4 phase difference film 5, the alignment layer 2 formed on the lambda / 4 phase difference film 5, the lambda / 2 phase difference pattern region of the liquid crystal coating layer formed on the alignment layer 2 as shown in FIG. A patterned retarder including the 17 and the phase difference pattern unformed region 18 can be manufactured. At this time, the liquid crystal coating layer is composed of a λ / 2 phase difference pattern region and a pattern non-formation region.

The λ / 4 retardation film of the present invention simultaneously plays the role of the film and the base film which are emitted by delaying the incident light λ by 1/4. Normally incident incident light lambda is 590 nm.

The material of the [lambda] / 4 retardation film is not particularly limited, but specific intrinsic birefringence values can be produced using positive, negative or mixed materials thereof.

In the present invention, the "material having a positive birefringence value" refers to a material having optically positive uniaxial property when molecules are oriented with a uniaxial order. For example, when the positive material is a resin, when the light is incident on a layer in which molecules have a uniaxial orientation, the refractive index of the light in the alignment direction is greater than the refractive index of the light in the direction orthogonal to the alignment direction. Say.

In addition, in this invention, a "material whose negative birefringence value is negative" means the material which has the characteristic which shows optically negative uniaxiality when a molecule is oriented with uniaxial order. For example, when the negative material is a resin, when light is incident on a layer formed with molecules having a uniaxial orientation, the resin has a refractive index of light in the alignment direction smaller than that of light in a direction orthogonal to the alignment direction. Say.

The positive or negative material is preferably a resin.

As the positive resin, specifically, an olefin polymer (for example, polyethylene, polypropylene, norbornene polymer, cycloolefin polymer, etc.), a polyester polymer (for example, polyethylene terephthalate, polybutylene terephthalate, etc.), poly Arylene sulfide-based polymers (e.g., polyphenylene sulfide, etc.), polyvinyl alcohol-based polymers, polycarbonate-based polymers, polyallylate-based polymers, cellulose ester-based polymers (the intrinsic birefringence values may be negative), polyether sulfone-based Polymers, polysulfone-based polymers, polyallyl sulfone-based polymers, polyvinyl chloride-based polymers, or poly-membered (binary, ternary, etc.) copolymers thereof. These can use together single 1 type or 2 types or more.

As the negative resin, specifically, polystyrene, polystyrene-based polymer (copolymer of styrene or styrene derivative and other monomer), polyacrylonitrile-based polymer, polymethyl methacrylate-based polymer, cellulose ester-based polymer (the intrinsic birefringence value is Amount), or a multi-membered (two-membered, ternary, etc.) copolymer polymer or the like. These may be used individually by 1 type, but may use 2 or more types together.

As said polystyrene polymer, the copolymer of styrene or a styrene derivative and 1 or more types chosen from acrylonitrile, maleic anhydride, methyl methacrylate, and butadiene is preferable. In the present invention, at least one selected from polystyrene, polystyrene-based polymer, polyacrylonitrile-based polymer, and polymethyl methacrylate-based polymer is preferable, and among them, polystyrene and polystyrene-based polymer are more preferable in view of high birefringence expression. In view of high heat resistance, a copolymer of styrene and / or styrene derivative with maleic anhydride is particularly preferred.

This invention does not specifically limit the method of manufacturing (lambda) / 4 phase (s) difference film. For example, the lambda / 4 phase difference film is prepared by the film forming method or extrusion molding method, it is preferable to stretch it. Stretching is a single-axis stretching stretching in the mechanical flow direction; Transverse uniaxial stretching (eg, tenter stretching) stretching in a direction orthogonal to the mechanical flow direction; It can be produced by biaxial stretching or the like which simultaneously performs longitudinal and transverse, and it is preferable to apply a diagonally stretched film.

Gradient stretching is a stretching method in which the direction of slow axis is formed in a diagonal direction rather than parallel or perpendicular to the direction of MD (Machine Direction) by varying the moving speed of both ends in the stretching process of the long film.

In addition, (lambda) / 4 phase (s) difference film can be used as it is in roll shape, or it can cut | disconnect to a fixed magnitude | size and can be used for manufacture of patterning retarder in the shape of a sheet. In particular, the roll-shaped lambda / 4 phase difference film is a roll-to-roll method, the patterning retarder can be produced, the pattern precision is high, it is suitable for large-scale and mass production, and easy to manufacture, its application is preferable.

It is preferable that (lambda) / 4 phase (s) difference film has a (retardation (Re) / wavelength) value of 0.2-0.3 at least in wavelength 450nm, 550nm, and 650nm. More preferably, the (retardation (Re) / wavelength) value is at least 0.23 to 0.27, more preferably at 0.24 to 0.26 at wavelength 450 nm, 550 nm, and 650 nm.

The alignment direction of the alignment film formed on the lambda / 4 phase difference film can be orthogonal or parallel to the slow axis of the lambda / 4 phase difference film. The orientation direction considers the wavelength dispersion characteristic of the liquid crystal coating layer to be formed on the alignment film and is intended to reduce cross talk at wavelengths other than the reference wavelength. Preferably, the alignment direction of the alignment layer is vertical so that the wavelength dispersion characteristic is small and the crosstalk reduction effect is excellent in all wavelength ranges.

The alignment layer is generally used in the art and is not particularly limited, but an organic alignment layer is preferably used. More preferably, those described in International Patent No. 2005/096041, Japanese Patent Application Laid-open No. Hei 10-123461, and Japanese Patent Application Laid-open No. Hei 10-227998 may be used.

The organic alignment film is formed using an alignment film composition containing an acrylate-based, polyimide-based or polyamic acid. The polyamic acid is a polymer obtained by reacting diamine and dianhydride, and the polyimide is obtained by imidating the polyamic acid, and their structure is not particularly limited.

It is important to maintain an appropriate viscosity of the alignment film composition. When the viscosity is too high, it is difficult to form an alignment film having a uniform thickness because it does not easily flow even when pressure is applied. When the viscosity is too low, the spreadability is good, but it is difficult to control the thickness of the alignment film. For example, it is preferable that they are 1 cP-13 cP at 25 degreeC.

In addition, it is good to consider the surface tension, the solid content and the volatility of the solvent. In particular, since the content of solid content affects the viscosity and surface tension, it is good to adjust the thickness and curing characteristics of the alignment film in consideration of the same.

If the solid content is too high, the viscosity is high, the thickness of the alignment film is thick, if it is too low, there is a problem that a high proportion of the solvent causes a stain after drying the solution. For example, the content of solids is preferably 0.1 to 30% by weight.

The alignment film composition is preferably in the form of a solution in which solid content such as acrylate, polyimide, or polyamic acid is dissolved in a solvent. The solvent is not particularly limited as long as it can dissolve the solid content. Specifically, butyl cellosolve, gamma-butyrolactone, N-methyl-2-pyrrolidone and dipropylene glycol monomethyl ether may be used.

Such solvents are suitably mixed so as to form a uniform alignment film in consideration of solubility, viscosity, surface tension, and the like.

In addition to the alignment layer composition, a crosslinking agent and a coupling agent may be further mixed to form an effective alignment layer.

The alignment film is produced by applying the alignment film composition to one side of the lambda / 4 phase difference film.

The application is not particularly limited as long as it is a method commonly used in the art. For example, application of the alignment layer composition may be carried out using a flow casting method and a method of applying an air knife, gravure, reverse roll, kiss roll, spray or blade. It can be formed by applying directly in a suitable development manner.

In order to improve the coating efficiency of the alignment film composition, a drying process may be further performed.

Drying is not particularly limited and can be generally carried out using a hot air dryer or a far infrared heater, the drying temperature is usually 30 to 100 ℃, preferably 50 to 80 ℃, drying time is usually 10 to 600 seconds, preferably 50 to 120 seconds is preferred.

Orientation is provided to the orientation film formed after this so that an orientation direction may become orthogonal or parallel to the slow axis of (lambda) / 4 phase (s) difference film. The method for providing orientation is not particularly limited, and the orientation is imparted to the entire alignment film.

For example, polarization exposure can be imparted by exposure with a polarized light or rubbing with a rubbing roll, but a polarization exposure that can set the orientation direction perpendicular to the alignment film with respect to the slow axis of the λ / 4 retardation film in a continuous process is preferable.

The light used for exposure is not particularly limited, but may be irradiated with a polarized electron beam such as polarized ultraviolet radiation, an electron beam, an ion beam, a plasma beam, and radiation at a predetermined angle. It is preferable to irradiate the ultraviolet-ray which polarized out of these.

A patterned retarder is manufactured by forming a λ / 2 phase difference pattern of the liquid crystal coating layer on the alignment layer.

The composition for forming a phase difference pattern of the liquid crystal coating layer may have an optical anisotropy and a liquid crystal compound having a crosslinkability by light may be used. Specifically, it is preferable to use a reactive liquid crystal compound (RM) as a material having refractive index anisotropy of 0.05 or more. More preferably, it is preferable to use the reactive liquid crystal compound (RM) described in Information Display 10 volume 1 (the latest research trend of reactive liquid crystal monomer (RM)).

The reactive liquid crystal compound refers to a monomer molecule having a liquid crystal phase including a mesogen capable of expressing liquid crystal and a terminal group capable of polymerization. By polymerizing the reactive liquid crystal compound, it is possible to obtain a crosslinked polymer network while maintaining the aligned phase of the liquid crystal. When the reactive liquid crystal compound molecules are cooled from the clearing point, a large area domain having a structure that is better aligned at a relatively low viscosity in the liquid crystal phase may be obtained than when the liquid crystal polymer having the same structure is used.

The large area liquid crystal crosslinked network film thus formed is mechanically and thermally stable because it has a solid thin film form while maintaining properties such as optical anisotropy and dielectric constant of the liquid crystal.

The retardation pattern forming composition is used after dilution in a solvent in order to ensure the efficiency of the coating process and uniformity of the coating layer, and preferably has a uniform dissolved in a solvent capable of dissolving the liquid crystal compound.

For example, the reactive liquid crystal compound may be a solvent capable of dissolving the same, and specifically, one or two or more mixed solvents selected from propylene glycol monomethyl ether acetate (PGMEA), methyl ethyl ketone (MEK), xylene, and chloroform to form a phase difference pattern. Prepare a composition for.

At this time, the content of the reactive liquid crystal compound in the composition for retardation pattern formation is to maintain 15 to 30% by weight. If the concentration is lower than 15% by weight, it is impossible to realize retardation, and when the concentration exceeds 30% by weight, the reactive liquid crystal compound is precipitated, thereby making it difficult to form a uniform retardation pattern.

It is important to maintain the appropriate viscosity of the composition for retardation pattern formation. If the viscosity is too high or the viscosity is too low, it is difficult to use the pattern roll device. For example, the viscosity of the composition for retardation pattern formation is preferably 3 cP to 7 cP at 25 ° C.

In addition, the composition for retardation pattern formation may further contain a plurality of additives without departing from the object of the present invention. Additives include, for example, dispersants, binders (e.g., free radical polymerizable and cationic polymerizable binders), preservatives (e.g., glutaraldehyde, tetramethylolacetyleneurea), antioxidants, degassing agents, defoamers, viscosity modifiers, flows Enhancers, antisettling agents, gloss enhancing agents, lubricants, adhesion promoters, anti dermal agents, metting agents, emulsifiers, stabilizers, hydrophobic agents, light stabilizer additives, treatment improvers, antistatic agents, and the like can be used.

The present invention may include an anti-glare laminate in order to protect the reactive liquid crystal compound for forming the retardation pattern and to prevent surface shine. In addition, a surface treatment layer such as a hard coating layer, an antireflection layer, an anti-stick layer, a diffusion barrier layer, and an anti-glare layer may be further stacked.

Hereinafter, preferred examples are provided to aid the understanding of the present invention, but the following examples are merely for exemplifying the present invention, and it will be apparent to those skilled in the art that various changes and modifications can be made within the scope and spirit of the present invention. It is natural that such variations and modifications fall within the scope of the appended claims.

Example 1

An acrylate-based alignment liquid was coated on the wound 50 μm-thick λ / 4 retardation film (Zeon Corp., obliquely stretched zeanoa film) and dried by hot air at 40 ° C. for 120 seconds to form an alignment film having a thickness of 1,000 Å.

An ultraviolet-ray polarized by a 14mW exposure lamp was irradiated on the moving alignment film to prepare a photo-aligned alignment film. The orientation direction was made into the vertical direction of the slow axis of (lambda) / 4 phase (s) difference film. The composition for forming the lambda / 2 phase difference pattern of 27% by weight (solid content) prepared by dissolving the reactive liquid crystal monomer in chloroform was printed on the alignment film using the pattern roll printing apparatus of FIG.

The pattern roll printing apparatus transferred the composition 34 to the surface of the blanket 32 from the concave plate-shaped gravure plate 31 filled with the composition 34 for retardation pattern formation. The doctor bleed 33 was used to fill the composition 34 only inside the gravure plate 31.

Subsequently, the pattern transferred on the blanket 32 was pattern-transferred on the orientation film 36 of (lambda) / 4 phase (s) difference film. At this time, the pressing plate 37 was provided in the lower part of the (lambda) / 4 phase (s) difference film corresponding to the part in which the blanket 32 and the orientation film 36 of the (lambda) / 4 phase (s) difference film contacted, and the pattern is formed.

After preliminary drying at 80 ° C. for 20 seconds, the resultant was dried at 110 ° C. for 5 seconds to form a λ / 2 phase difference pattern of a 1.5 μm thick liquid crystal coating layer. Thereafter, a 14 mW exposure lamp is photocured with ultraviolet light for 500 seconds to pass through the region where the phase difference delay of light passing through the λ / 4 phase difference film and the phase difference pattern is -λ / 4 and the λ / 4 phase difference film and the phase difference pattern unformed area. A patterned retarder was produced in which regions in which the phase difference delay of one light was λ / 4 alternately existed.

Example 2

A patterned retarder was manufactured in the same manner as in Example 1, but using the pattern roll printing apparatus of FIG. 5 (b).

The pattern roll device was provided so that the gravure roll (transition roll) 31 into which the composition 34 for retardation pattern formation was inject | poured into the recessed plate of the roll surface, and the blanket 32 which transfers the said composition may be in close contact. The gravure roll 31 uses a doctor blade 33 to fill the retardation pattern forming composition 34 only in the recess plate, and the retardation pattern forming composition 34 is continuously formed from the composition injection part 35. It was configured to be supplied.

The composition 34 for retardation pattern formation was transferred from the gravure roll 31 to the blanket 32. Subsequently, the pattern transferred on the blanket 32 was pattern-transferred on the orientation film 36 of (lambda) / 4 phase (s) difference film. At this time, the pressing roll 37 was provided in the lower part of the (lambda) / 4 phase (s) difference film corresponding to the part in which the blanket 32 and the orientation film 36 of the (lambda) / 4 phase (s) difference film contacted, and the pattern is formed.

Example 3

The same process as in Example 1, but using the pattern roll printing apparatus of Figure 6 (a) to prepare a patterned retarder.

The pattern roll printing apparatus applies the composition 34 to the entire surface of the blanket 32 from the composition injecting portion 35 for retardation pattern formation, and then transfers the ink corresponding to the non-pattern to the surface of the convex plate of the gravure plate 31. After removal, the pattern on the blanket 32 was patterned on the alignment film 36 of the lambda / 4 phase difference film. At this time, the press plate 37 was provided in the lower part of (lambda) / 4 phase (s) difference film corresponding to the part in which the blanket 32 and the orientation film 36 of (lambda) / 4 phase (s) difference film contacted, and a pattern is formed.

Example 4

The same process as in Example 1 was performed, but the patterned retarder was manufactured using the pattern roll printing apparatus of FIG. 6 (b).

The pattern roll printing apparatus was provided so that the blanket 32 in which the composition 34 for retardation pattern formation was apply | coated on the roll surface, and the gravure roll 31 in which the recessed plate were formed may closely contact. After transfer-removing the ink corresponding to the nonpattern on the surface of the convex plate of the gravure roll 31, the pattern on the blanket 32 was patterned on the alignment film 36 of (lambda) / 4 phase (s) difference film. At this time, the press roll 37 was provided in the lower part of the (lambda) / 4 phase (s) difference film corresponding to the part in which the blanket 32 and the orientation film 36 of the (lambda) / 4 phase (s) difference film contacted, and the pattern is formed.

1: alignment film forming portion 2: alignment film
3: phase difference pattern forming part 5: lambda / 4 phase difference film
7: first roll 9: second roll
11 transfer unit 13 light source
17: composition printing part for phase difference pattern formation
18: phase difference pattern unformed area
19: drying part 21: hardening part
31: gravure plate or gravure roll
32: Blanket 33: Doctor Bled
34 ink (composition for phase difference pattern formation)
35 ink injection portion 36 printed object (alignment film)
37: pressure plate or pressure roll

Claims (10)

forming an alignment film on the λ / 4 retardation film such that the alignment direction is constant; And forming a λ / 2 phase difference pattern of the liquid crystal coating layer on the alignment layer using a pattern roll.
The method of manufacturing a patterned retarder according to claim 1, wherein the lambda / 4 phase difference film is a sheet of obliquely stretched sheet or a continuous film in which the obliquely stretched film is drawn from a roll.
The method of claim 2, wherein the orientation direction is orthogonal or parallel to the slow axis of the λ / 4 retardation film.
The manufacturing method of the patterned retarder of Claim 3 in which an orientation direction is formed in a oriented film by polarizing electron beam irradiation or a rubbing process.
The method of manufacturing a patterned retarder according to claim 1, wherein the λ / 2 retardation pattern is alternately arranged in a stripe shape with a λ / 2 retardation region in which a liquid crystal coating layer is formed and an unformed region in which the liquid crystal coating layer is not formed.
The method of claim 5, wherein the liquid crystal coating layer comprises a reactive liquid crystal compound (RM).
The manufacturing method of the patterned retarder of Claim 1 which uses a press roll or a pressure plate for supporting the alignment film part in which a (lambda) / 2 phase difference pattern is formed further below a (lambda) / 4 phase (s) difference film.
The method of manufacturing a patterned retarder according to claim 7, further comprising a transition roll for transferring the composition for pattern formation to the pattern roll.
The method of claim 1, wherein the pattern formation is performed by a printing method selected from among offset, gravure, inverse offset, and gravure offset.
The manufacturing method of the patterned retarder of any one of Claims 1-9 manufactured by the roll-to-roll system.

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