KR20130035908A - Liquid crystal composition - Google Patents

Abstract

PURPOSE: A liquid crystal composition is provided to manufacture a retardation film without the lack of uniformity of phase difference. CONSTITUTION: A liquid crystal composition forming a liquid crystal hardened material layer(110) comprises 70-99 parts by weight of polymerizable liquid crystal monomer, 1-30 parts by weight of polymerizable non liquid-crystal monomer, 0.1-10 parts by weight of photopolymerization initiator, 0.01-1 parts by weight of surfactant, and a solvent, based on 100.0 parts by weight of the sum of the polymerizable liquid crystal monomer and polymerizable non-liquid crystal monomer. The contact angle of the liquid crystal composition is 10 degrees or more. The solvent is a cyclic ether solvent and a ketone-based solvent.

Description

Liquid crystal composition {LIQUID CRYSTAL COMPOSITION}

The present invention relates to a liquid crystal composition for a pattern retardation film.

Generally, various optical films are provided in display devices, such as a liquid crystal display device. As one of these optical films, the film provided with the layer which hardened the liquid crystal composition is known conventionally (refer patent documents 1-3). Such a film is manufactured by hardening a liquid crystal composition after apply | coating a liquid crystal composition normally to the surface of a suitable base material, performing an orientation process etc. as needed.

Japanese Patent No. 4553569 Japanese Patent Publication No. 2008-107823 Japanese Patent Publication No. 2008-242001

One of the representative methods of the display method of the three-dimensional display device that is being developed recently is a method called a passive method. In a passive stereoscopic display device, a right eye image and a left eye image are usually displayed in the same screen, and these images are divided into left and right eyes using dedicated glasses. Therefore, in the passive stereoscopic display device, two or more kinds of regions having different in-plane retardation (in-plane retardation) are different from each other in order to display images corresponding to each of the left and right eyes in different polarization states, respectively. The retardation film (namely, "pattern retardation film") which has in a position may be provided.

The said pattern retardation film may be manufactured with a liquid crystal composition. The pattern retardation film manufactured from a liquid crystal composition is provided with the layer which consists of hardened | cured material of a liquid crystal composition, and this layer has two or more types of area | regions which have a different phase difference. The layer which consists of hardened | cured material of such a liquid crystal composition is manufactured by forming the film | membrane (liquid crystal composition layer) of a liquid crystal composition by the die-coating method, for example, and hardening the film | membrane.

By the way, in the conventional pattern retardation film, in-plane retardation did not become a desired value partially, and there existed a case where retardation nonuniformity might arise. The phase difference nonuniformity refers to a phenomenon in which the phase difference is partially nonuniform in the region where the phase difference should be constant. If such phase difference nonuniformity occurs, there is a possibility that cross talk occurs or the image to be displayed is not partially displayed. The crosstalk here refers to a phenomenon in which a left eye image is visually recognized as a right eye or a right eye image is visually recognized as a left eye in a three-dimensional display device.

This invention was devised in view of the said subject, Comprising: It aims at providing the liquid crystal composition which can obtain the pattern retardation film without retardation nonuniformity.

MEANS TO SOLVE THE PROBLEM As a result of earnestly examining in order to solve the said subject, it determined that (A) polymerizable liquid crystal monomer, (B) polymerizable non-liquid crystal monomer, (C) photoinitiator, (D) surfactant, and (E) solvent are predetermined. The present invention was completed by discovering that a pattern retardation film without a retardation unevenness can be easily produced by using a liquid crystal composition containing a weight ratio of and having a contact angle in a predetermined range with respect to stainless steel.

That is, this invention is as follows [1]-[3].

[1] As a liquid crystal composition for a pattern retardation film,

The said liquid crystal composition makes the total amount of (A) polymeric liquid crystal monomer and (B) polymerizable non-liquid crystal monomer 100 weight part, (A) polymeric weight liquid crystal monomer 70 weight part or more and 99 weight part or less, (B) polymerizable 1 part by weight or more and 30 parts by weight or less of the non-liquid crystal monomer, (C) 0.1 part by weight or more and 10 parts by weight or less, (D) 0.01 part by weight or more and 1 part by weight or less of the surfactant, and (E) a solvent,

A liquid crystal composition, wherein the contact angle of the liquid crystal composition to stainless steel SUS316L is 10 ° or more.

[2] The liquid crystal composition is used in a method for producing a pattern retardation film having the liquid crystal composition coated on a coating substrate,

The liquid crystal composition of this invention whose contact angle of the said liquid crystal composition with respect to the said coating base material is 30 degrees or less.

[3] the solvent (E) contains a cyclic ether solvent and a ketone solvent,

The liquid crystal composition of this invention whose contact angle of the said liquid crystal composition with respect to stainless steel SUS316L is 15 degrees or more.

According to the liquid crystal composition of this invention, a long pattern retardation film without retardation nonuniformity can be obtained.

1 is a plan view schematically showing an example of a pattern that the liquid crystal cured product layer may have.
It is a figure which shows typically an example of the structure which apply | coats a liquid crystal composition to a coating base material by the die-coating method.
3 is an exploded plan view schematically showing an example of a liquid crystal display device that can be used as the stereoscopic display device of the present invention.
It is a figure which shows typically a mode at the time of measuring the contact angle of a liquid crystal composition.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment, an illustration, etc. are shown and this invention is demonstrated in detail. However, the present invention is not limited to the following embodiments, examples, and the like, and may be arbitrarily changed and implemented without departing from the scope of the claims and equivalents thereof. In addition, in the following description, "(meth) acryl" means "acryl" and "methacryl", and "(meth) acrylate" means "acrylate" and "methacrylate". In addition, "phase difference" means in-plane phase difference (in-plane retardation) unless otherwise stated. In addition, the angle of the optical axis of an optical element, such as the transmission axis of a polarizing plate, the slow axis of a retardation film, etc. means the angle seen from the thickness direction unless otherwise stated. In addition, the plus and minus directions of the angles of the optical axis denote counterclockwise rotation angles as plus angles and clockwise rotation angles as negative angles in the direction of viewing the image with polarized glasses. In addition, the direction of a component "parallel", "vertical", or "orthogonal" may include the error in the range which does not impair the effect of this invention, for example within the range of +/- 5 degrees.

[One. summary]

The liquid crystal composition of this invention is a liquid crystal composition for pattern retardation films. Usually, the pattern retardation film manufactured using the liquid crystal composition of this invention is equipped with the layer (henceforth "liquid crystal hardened | cured material layer" suitably) which consists of hardened | cured material of the liquid crystal composition of this invention. Since this liquid crystal hardened | cured material layer has two or more types of area | regions which have a different phase difference, two or more types of area | regions which have different phase difference also in a pattern phase difference film are provided in a different position in surface.

Moreover, the liquid crystal composition of this invention contains (A) polymeric liquid crystal monomer, (B) polymeric non-liquid crystal monomer, (C) photoinitiator, (D) surfactant, and (E) solvent in predetermined weight ratio. . Furthermore, the liquid crystal composition of the present invention has a predetermined high contact angle with respect to stainless steel SUS316L. By using such a liquid crystal composition of this invention, the pattern retardation film without retardation nonuniformity can be manufactured.

Although the reason for obtaining the elongate pattern retardation film without retardation nonuniformity by the liquid crystal composition of this invention is not clear, According to examination of this inventor, it is estimated by the following reason.

Usually, when manufacturing a pattern retardation film using a liquid crystal composition, the process of forming a liquid crystal composition layer by a die coating method is performed. In the die coating method, a liquid crystal composition layer is formed by discharging a liquid crystal composition from a die and apply | coating the discharged liquid crystal composition to the surface of a suitable coating base material. By the way, when application | coating by the die-coating method is performed continuously, a liquid crystal composition may gradually become lump in the downstream part of die | dye. In this manner, when the liquid crystal composition is transferred to the surface of the coating substrate, the transferred portion tends to be unable to control the thickness of the liquid crystal composition layer. For this reason, since the thickness of a liquid crystal composition layer becomes nonuniform and retardation also becomes nonuniform with the nonuniform thickness, it is estimated that retardation nonuniformity had arisen in the pattern retardation film conventionally.

In the die coating method, the die is usually formed of a metal such as stainless steel. Therefore, in the present invention, the liquid crystal composition is easily transferred from the die to the coating base material by increasing the contact angle of the liquid crystal composition with respect to the die. For this reason, when using the liquid crystal composition of this invention, since a liquid crystal composition becomes difficult to mix in the downstream part of die | dye, it can prevent that the thickness of a liquid crystal composition layer becomes nonuniform, and also prevents the phase difference nonuniformity of a pattern retardation film. It is assumed that this is becoming possible.

[2. (A) polymerizable liquid crystal monomer]

The polymerizable liquid crystal monomer (A) refers to a liquid crystal compound having a polymerizable group. In addition, a polymerizable group means group which raise | generates a polymerization reaction on suitable conditions and polymerizes the compound containing the said polymerizable group. Examples of the polymerizable group include a carboxyl group, a (meth) acryl group, an epoxy group, a thioepoxy group, a mercapto group, an isocyanate group, an isothiocyanate group, an oxetane group, a thioethanyl group, an aziridinyl group, A pyrrole group, a vinyl group, an allyl group, a fumarate group, cinnamic oil group, an oxazoline group, a hydroxyl group, an alkoxy silyl group, an amino group, etc. are mentioned. One type or two or more types of polymerizable groups contained in one molecule may be used. The number of polymerizable groups per molecule is usually one or more, preferably two or more.

When the (A) polymerizable liquid crystal monomer is polymerized, the liquid crystal composition of the present invention is also cured. Usually, in the hardened | cured material of the liquid crystal composition of this invention obtained in this way, the orientation state of the (A) polymerizable liquid crystal monomer before superposition | polymerization is maintained. Therefore, the refractive index anisotropy ((DELTA) n) of the hardened | cured material of the liquid crystal composition of this invention can be adjusted by controlling the orientation state of (A) polymeric liquid crystal monomer, and also the in-plane phase difference of the pattern retardation film of this invention can be adjusted.

(A) As a polymerizable liquid crystal monomer, Unexamined-Japanese-Patent No. 11-130729, Unexamined-Japanese-Patent No. 8-104870, Unexamined-Japanese-Patent No. 2005-309255, Unexamined-Japanese-Patent No. 2005-263789, Japan patent Publication 2001-519317, Japanese Patent Publication 2002-533742, Japanese Patent Publication 2002-308832, Japanese Patent Publication 2002-265421, Japanese Patent Publication No. 62-070406, Japanese Patent Publication No. 11- The thing described in 100575, Unexamined-Japanese-Patent No. 2008-291218, Unexamined-Japanese-Patent No. 2008-242349, International Publication 2009/133290, Japan Patent Application 2008-170835, etc. are mentioned.

Especially, the (A) polymeric liquid crystal monomer represented by following General formula (1) is preferable.

In Formula 1, R ¹ , R ² and R ³ each independently represent a hydrogen atom or a methyl group. In addition, in said Formula (1), R <^4> and R <^5> represents a C2-C12 alkylene group each independently. Especially, it is preferable that carbon number of this alkylene group is 4-6. Moreover, although this alkylene group may have a branch in the carbon chain, it is preferable that it is a linear alkylene group which does not have a branch in the carbon chain. When the example of the (A) polymerizable liquid crystal monomer represented by General formula (1) is mentioned as a product name, "LC242" by BASF Corporation, etc. are mentioned.

(A) A polymerizable liquid crystal monomer may be used individually by 1 type, and may be used combining two or more types by arbitrary ratios.

(A) Although a polymerizable liquid crystal monomer may become a nematic phase of a liquid crystal state at a certain temperature, when temperature rises, it will lose liquid crystal and become an isotropic phase (isotropic phase). At this time, the boundary temperature that changes from the nematic phase to the isotropic phase is referred to as the nematic-isotropic transition temperature (hereinafter sometimes referred to as "NI point" as appropriate). When producing a pattern retardation film, it is preferable that the said NI point is low. For this reason, 250 degreeC or less is preferable, as for the NI point of the said (A) polymerizable liquid crystal monomer when measuring only with (A) polymeric liquid crystal monomer, 200 degrees C or less is more preferable, 150 degrees C or less is especially preferable. In addition, a minimum is 40 degreeC or more normally.

(A) The refractive index anisotropy (Δn) of the polymerizable liquid crystal monomer is usually 0.01 or more, preferably 0.05 or more at a wavelength of 546 nm. In addition, when the (A) polymerizable liquid crystal monomer having refractive index anisotropy (Δn) of 0.30 or more may be used, the long wavelength side absorption end of the ultraviolet absorption spectrum may reach the visible band, but the absorption end of the spectrum Even in the visible band, it can be used as long as it does not adversely affect the desired optical performance. By using the (A) polymerizable liquid crystal monomer having such a high refractive index anisotropy (Δn), the thickness of the cured liquid crystal layer required to obtain a desired optical function can be reduced, thereby improving orientation uniformity or economy. You can improve your costs. However, from the viewpoint of preventing the thickness of the liquid crystal cured product layer from being excessively thin and the thickness accuracy from decreasing, the refractive index anisotropy (Δn) of the polymerizable liquid crystal monomer (A) is preferably 0.20 or less, and more preferably 0.17 or less.

When the liquid crystal composition of this invention contains only one type of (A) polymerizable liquid crystal monomer, the refractive index anisotropy ((DELTA) n) of the said (A) polymerizable liquid crystal monomer is (A) polymerizable in the liquid crystal composition of this invention as it is. Let it be refractive index anisotropy ((DELTA) n) of a liquid crystal monomer. In addition, when the liquid crystal composition of this invention contains two or more types of (A) polymerizable liquid crystal monomers, the value of refractive index anisotropy ((DELTA) n) of each (A) polymerizable liquid crystal monomer, and each (A) polymerizable liquid crystal monomer The value of the weighted average calculated | required from the content rate of is made into the refractive index anisotropy ((DELTA) n) of the (A) polymeric liquid crystal monomer in the liquid crystal composition of this invention. The value of refractive index anisotropy (Δn) can be measured by the cinnamon method.

In the liquid crystal composition of the present invention, when the total amount of the (A) polymerizable liquid crystal monomer and the (B) polymerizable non-liquid crystal monomer is 100 parts by weight, the amount of the (A) polymerizable liquid crystal monomer is usually 70 parts by weight or more, preferably Is 75 parts by weight or more, more preferably 80 parts by weight or more, usually 99 parts by weight or less, preferably 95 parts by weight or less, and more preferably 90 parts by weight or less. (A) The refractive index anisotropy (DELTA) n can be made high by carrying out quantity of a polymeric liquid crystal monomer more than the lower limit of the said range, and favorable film-forming property can be obtained by below an upper limit.

[3. (B) polymerizable non-liquid crystalline monomer]

The polymerizable non-liquid crystal monomer (B) is a compound having a polymerizable group and capable of causing a polymerization reaction when light is irradiated to the liquid crystal composition of the present invention, and does not express liquid crystallinity. By using the (B) polymerizable non-liquid crystal monomer, the mechanical strength of the liquid crystal cured product layer can be increased.

It is preferable that the liquid crystal composition of this invention contains the polyfunctional (B) polymerizable non-liquid crystalline monomer as (B) polymerizable non-liquid crystalline monomer. The multifunctional (B) polymerizable non-liquid crystalline monomer refers to the (B) polymerizable non-liquid crystalline monomer including two or more polymerizable groups per molecule, and among them, one containing three or more polymerizable groups per molecule. desirable. By using such a polyfunctional (B) polymerizable non-liquid crystal monomer, the NI point of the liquid crystal composition of this invention can be reduced. For example, the polymerizable group of the (B) polymerizable non-liquid crystal monomer tends to attract or repel each other with the polymerizable group of the (A) polymerizable liquid crystal monomer due to the influence of electrostatic attraction, intermolecular force, and the like. As a result, the multifunctional (B) polymerizable non-liquid crystal monomer exhibits an effect of disturbing the arrangement regularity of the (A) polymerizable liquid crystal monomer. Therefore, the liquid crystallinity of the (A) polymerizable liquid crystal monomer tends to be lost, and the NI point of the liquid crystal composition of the present invention is estimated to be reduced as described above.

The specific ratio of the polyfunctional (B) polymerizable non-liquid crystal monomer in the (B) polymerizable non-liquid crystal monomer may be set in accordance with the NI point of the target liquid crystal composition, preferably 20% by weight or more, and more preferably. Preferably it is 30 weight% or more, and is 100 weight% or less normally.

Examples of the (B) polymerizable non-liquid crystal monomers include trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, and dipentaerythritol hexa (Meth) acrylate, 2- (2-vinyloxyethoxy) ethyl acrylate, 2-hydroxy-3-acryloyloxypropyl methacrylate, polyethylene glycol di (meth) acrylate, ethoxylated bisphenol A di (Meth) acrylate, 9,9-bis [4- (2-acryloyloxyethoxy) phenyl] fluorene, tricyclodecanedimethanol di (meth) acrylate, 1,10-decanediol Di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, 1,9-nonanediol di (meth) acrylate, polypropylene glycol di (meth) acrylate, 4- ( ω-propenyloxy) ethyloxy-4'-cyanobipe And the like can be mentioned (meth) acrylate compounds such as. Especially, a (meth) acrylate compound is preferable from a viewpoint of reducing the NI point of the liquid crystal composition of this invention efficiently.

The molecular weight of the (B) polymerizable non-liquid crystal monomer is usually 100 or more, preferably 200 or more, more preferably 300 or more, usually 2000 or less, preferably 1500 or less, and more preferably 1000 or less. When the molecular weight of the (B) polymerizable non-liquid crystal monomer is at least the lower limit of the above range, volatilization of the (B) polymerizable non-liquid crystal monomer at the time of the heating process can be suppressed, and favorable film formability can be obtained by being below the upper limit.

In the liquid crystal composition of the present invention, when the total amount of the (A) polymerizable liquid crystal monomer and the (B) polymerizable non-liquid crystal monomer is 100 parts by weight, the amount of the (B) polymerizable non-liquid crystal monomer is usually 1 part by weight or more, preferably Preferably it is 5 weight part or more, More preferably, it is 10 weight part or more, Usually 30 weight part or less, Preferably it is 25 weight part or less, More preferably, it is 20 weight part or less. In addition, (B) polymeric non-liquid crystal monomer may be used individually by 1 type, and may be used combining two or more types by arbitrary ratios. In the case of two or more types, the total amount thereof is preferably in the range of the amount of the (B) polymerizable non-liquid crystal monomer. (B) By making the amount of the polymerizable non-liquid crystal monomer more than the lower limit of the above range, the mechanical strength of the liquid crystal cured product layer can be increased or the NI point can be efficiently lowered. Can be stabilized.

[4. (C) photoinitiator]

(C) Photoinitiator is a polymerization initiator which starts the polymerization reaction of (A) polymeric liquid crystal monomer and (B) polymeric non-liquid crystal monomer. (C) By including a photoinitiator, the liquid crystal composition of this invention becomes possible to perform the hardening rapidly. Moreover, the (C) photoinitiator also shows the effect of reducing the NI point of the liquid crystal composition of this invention normally.

(C) It is preferable that it is a compound which can generate a radical by irradiating light as a photoinitiator. In particular, since light used for curing the liquid crystal composition of the present invention is usually ultraviolet (UV), it is more preferable to use a radical capable of generating radicals by irradiation of ultraviolet rays as the (C) photopolymerization initiator. .

Examples of the photopolymerization initiator (C) include acetophenone, 2,2-dimethoxy-2-phenylacetophenone, diethoxyacetophenone, 1-hydroxycyclohexylphenyl ketone, and 2-methyl-1- [ 4- (methylthio) phenyl] -2-morpholinopropane-1-one, 1,2-benzyl-2-methylamino-1- (4-morpholinophenyl) butanone, 1,2-hydro Acetophenone or its derivatives such as oxy-2-methyl-1-phenylpropan-1-one; Benzophenones or derivatives thereof such as benzophenone, 4,4'-bis (dimethylamino) benzophenone, 4-trimethylsilylbenzophenone, 4-benzoyl-4'-methyldiphenylsulfide and the like; Benzoin or derivatives thereof such as benzoin, benzoin ethyl ether, benzoin propyl ether, benzoin isobutyl ether, and benzoin isopropyl ether; Methylphenylglyoxylate, benzodimethyl ketal, 2,4,6-trimethylbenzoyldiphenylphosphine oxide, bis (2,6-dichlorobenzoyl) -phenylphosphine oxide, bis (2,6-dichloro Benzoyl) -2,5-dimethylphenylphosphine oxide, bis (2,6-dichlorobenzoyl) -4-ethoxyphenylphosphine oxide, bis (2,6-dichlorobenzoyl) -4-biphenylylphosph Fin oxide, bis (2,6-dichlorobenzoyl) -4-propylphenylphosphineoxide, bis (2,6-dichlorobenzoyl) -2-naphthylphosphine oxide, bis (2,6-dichlorobenzoyl ) -1-naphthylphosphine oxide, bis (2,6-dichlorobenzoyl) -4-chlorophenylphosphine oxide, bis (2,6-dichlorobenzoyl) -2,4-dimethoxyphenylphosphine Oxide, bis (2,6-dichlorobenzoyl) -decylphosphineoxide, bis (2,6-dichlorobenzoyl) -4-octylphenylphosphine oxide, bis (2,6-dichlorobenzoyl) -2, 5-die Tylphenylphosphine oxide, bis (2,6-dichlorobenzoyl) -phenylphosphine oxide, bis (2,4,6-trimethylbenzoyl) -2,5-dimethylphenylphosphine oxide, bis (2,6 -Dichloro-3,4,5-trimethoxybenzoyl) -2,5-dimethylphenylphosphineoxide, bis (2,6-dichloro-3,4,5-trimethoxybenzoyl) -4- Oxyphenylphosphine oxide, bis (2-methyl-1-naphthoyl) -2,5-dimethylphenylphosphine oxide, bis (2-methyl-1-naphthoyl) -2,5-phenylphosphine oxide, bis (2-methyl-1-naphthoyl) -4-biphenylylphosphineoxide, bis (2-methyl-1-naphthoyl) -4-ethoxybiphenylphosphine oxide, bis (2-methyl-1- Naphthoyl) -2-naphthylphosphine oxide, bis (2-methyl-1-naphthoyl) -4-propylphenylphosphineoxide, bis (2-methoxyl-1-naphthoyl) -2,5-di Methylphenylphosphine oxide, bis (2-methoxyl-1-naphthoyl) -4-methoxyphenylphosphine oxide, bis (2-methoxyl-1- Protoyl) -4-biphenylylphosphineoxide, bis (2-chloro-1-naphthoyl) -2,5-dimethylphenylylphosphineoxide, bis (2,6-dimethoxybenzoyl) -2, 4, 6- trimethyl pentyl phosphine oxide, bis (2, 4, 6- trimethyl benzoyl) phenyl phosphine oxide, etc. are mentioned. (C) A photoinitiator may be used individually by 1 type, and may be used combining two or more types by arbitrary ratios.

In the liquid crystal composition of the present invention, when the total amount of the (A) polymerizable liquid crystal monomer and the (B) polymerizable non-liquid crystal monomer is 100 parts by weight, the amount of the (C) photopolymerization initiator is usually 0.1 parts by weight or more, preferably It is 0.5 weight part or more, More preferably, it is 1 weight part or more, Usually 10 weight part or less, Preferably it is 7 weight part or less, More preferably, it is 5 weight part or less. (C) By making quantity of a photoinitiator more than the lower limit of the said range, a polymerization degree can be made high, the hardness of a liquid crystal hardened | cured material layer can be made high, the NI point of a liquid crystal composition can be effectively lowered, and a liquid crystal phase can be made into below an upper limit. By making it stable, orientation uniformity can be improved.

[5. (D) surfactants]

As (D) surfactant, it is preferable to select suitably and to use the thing which does not excessively inhibit the orientation of the (A) polymerizable liquid crystal monomer. By including (D) surfactant, the orientation of the (A) polymerizable liquid crystal monomer can be made uniform.

Especially, it is preferable to use surfactant (namely, fluorine-type surfactant) containing fluorine as surfactant (D). By using a fluorine-type surfactant as (D) surfactant, the height difference of the area | region which has a different phase difference in a liquid crystal hardened | cured material layer can be made small. That is, in general, in the liquid crystal cured product layer including two or more types of regions having different phase differences, the height (dimensions in the thickness direction) of some regions is higher than the height of the other regions, and fine irregularities are formed on the surface of the liquid crystal cured product layer. It was formed in some cases. By the way, since the height difference of the area | region which has a different phase difference can be made small by using a fluorine-type surfactant as surfactant (D), the said unevenness | corrugation of the surface of a liquid-crystal hardened | cured material layer can be made small.

The surfactant (D) may be any type such as cationic, anionic or nonionic. Especially, nonionic surfactant is preferable. It is because the height difference of the area | region which has different phase difference in a liquid crystal hardened | cured material layer can be made small effectively.

Examples of the surfactants (D) include OMNOVA's PolyFox PF-151N, PF-636, PF-6320, PF-656, PF-6520, PF-3320, PF-651, and PF-652 as fluorine-based surfactants; Neossa Futagent FTX-204D, FTX-208G, FTX-209F, FTX-212P, FTX-215M, FTX-222F, FTX-602A; DIC Corporation Megapuck F-477, F-553, F-554, F-555, F-556, TF-1367; Sumitomo Three-Mesa Novec FC-430, FC-4430, FC-4432; AGC Seimi Chemical Co., Ltd. Saffron KH-40 etc. are mentioned. (D) Surfactant may be used individually by 1 type, and may be used combining two or more types by arbitrary ratios.

In the liquid crystal composition of the present invention, when the total amount of the (A) polymerizable liquid crystal monomer and the (B) polymerizable non-liquid crystal monomer is 100 parts by weight, the amount of the (D) surfactant is usually 0.01 part by weight or more, preferably 0.05 It is weight part or more, More preferably, it is 0.10 weight part or more, Usually 1 weight part or less, Preferably it is 0.50 weight part or less, More preferably, it is 0.30 weight part or less. By setting the amount of the surfactant to be equal to or greater than the lower limit of the above range, the orientation regulating force at the air interface can be increased to prevent the occurrence of orientation defects, and the liquid crystal phase can be stabilized by improving the orientation uniformity by using the upper limit or less. Can be.

[6. (E) solvent]

(E) A solvent has the effect | action which improves the applicability | paintability of the liquid crystal composition of this invention. Moreover, the (E) solvent has an effect | action which adjusts the contact angle of the liquid crystal composition of this invention. Therefore, it is preferable to use what is suitable as (E) solvent so that the contact angle of the liquid crystal composition of this invention may fall in a desired range.

Examples of the solvent include ketone solvents, alkyl halide solvents, amide solvents, sulfoxide solvents, heterocyclic compound solvents, hydrocarbon solvents, ester solvents and ether solvents. Among them, ketone solvents and cyclic ether solvents are preferred because they readily dissolve the liquid crystal compound.

As a ketone solvent, For example, Non-cyclic ketones, such as methyl ethyl ketone and methyl isobutyl ketone; Cyclic ketones, such as cyclopropanone, cyclopentanone, and a cyclohexanone, etc. are mentioned. In addition, examples of the cyclic ether solvent include tetrahydrofuran, 1,3-dioxolane, 1,4-dioxane and the like. Among these, ketone solvents are preferable.

In addition, a solvent may be used individually by 1 type and may be used combining two or more types by arbitrary ratios. In particular, when the mixed solvent which combined cyclic ether solvent and a ketone solvent is used, since the solubility of (A) polymeric liquid crystal monomer improves, the orientation of the said (A) polymeric liquid crystal monomer will improve, and it is preferable. At this time, the weight ratio of the cyclic ether solvent and the ketone solvent is 5.0% or more, preferably 10.0% or more, more preferably 20% or more, usually 60% or less, preferably "cyclic ether solvent / ketone solvent". Preferably it is 50% or less, More preferably, it is 40% or less.

In the liquid crystal composition of the present invention, when the total amount of the (A) polymerizable liquid crystal monomer and the (B) polymerizable non-liquid crystal monomer is 100 parts by weight, the amount of the solvent (E) is usually 50 parts by weight or more, preferably 100 weight parts. It is at least 150 parts by weight, particularly preferably at least 150 parts by weight, usually at most 400 parts by weight, preferably at most 300 parts by weight, particularly preferably at most 200 parts by weight. In the case where the amount of the solvent (E) is in this range, the applicability of the liquid crystal composition of the present invention can be generally improved, and the contact angle can be in the desired range.

[7. Optional ingredients]

The liquid crystal composition of the present invention may contain other components in addition to those described above as long as the effects of the present invention are not significantly impaired. In addition, these components may be used individually by 1 type, and may be used combining two or more types by arbitrary ratios.

For example, the liquid crystal composition of this invention may contain the ultraviolet absorber, antioxidant, etc.

[8. Physical properties of liquid crystal composition;

The contact angle with respect to stainless steel SUS316L of the liquid crystal composition of this invention is 10 degrees or more normally, Preferably it is 15 degrees or more, More preferably, it is 17 degrees or more. The high contact angle with respect to stainless steel SUS316L in this way means that the contact angle with respect to the die used for the die-coating method is high, and that means that a liquid-crystal composition falls easily from a die | dye. For this reason, since a liquid crystal composition can be prevented from clogging in the downstream part of die | dye, stable application | coating becomes possible. Therefore, the thickness of a liquid crystal composition layer can be prevented from becoming nonuniform, and also it becomes possible to prevent retardation nonuniformity of a pattern retardation film. Moreover, there is no restriction | limiting in the upper limit of the contact angle with respect to the said stainless steel SUS316L, Usually, it is 30 degrees or less.

The contact angle with respect to stainless steel SUS316L of a liquid crystal composition is measured as follows.

First, a flat plate formed of stainless steel SUS316L and having a flat surface without irregularities is prepared. At this time, the roughness of the plane is arithmetic mean roughness Ra, and is 0.05 µm to 0.13 µm. The flat plate is placed so that the plane is horizontal and upward, and the liquid crystal composition is dropped on the plane. An image of 1 second after the dropping (that is, 1 second after the droplet of the liquid crystal composition contacts the flat plate) is taken, and the contact angle is obtained by the θ / 2 method from the taken image. The measurement is performed in an environment of normal temperature and normal pressure. As a measuring apparatus, "Drop Master 500" made from Kyowa Interface Science Co., Ltd. is used, for example.

In addition, depending on the flat plate of stainless steel SUS316L, arithmetic mean roughness Ra of a plane may differ according to a measuring direction. In this case, the arithmetic mean roughness Ra of the plane in the measurement direction of the contact angle is in the above range. Usually, as shown in FIG. 4, the measurement direction X of a contact angle becomes perpendicular | vertical with respect to the observation direction Y at the time of observing the droplet 510 with the camera 520. As shown in FIG. Therefore, the flat plate 540 which normally has the arithmetic mean roughness Ra of the plane 530 measured in the direction X perpendicular | vertical with respect to the observation direction Y is used in the said range. In this case, the arithmetic mean roughness Ra of the plane 530 in the observation direction Y is usually 0.17 µm to 0.23 µm.

Moreover, the contact angle with respect to a coating base material of the liquid crystal composition of this invention is 30 degrees or less normally, Preferably it is 28 degrees or less, More preferably, it is 25 degrees or less. Here, a coating base material means the base material used as an object which apply | coats a liquid crystal composition, when forming a liquid crystal composition layer. When the contact angle with respect to an application | coating base material is small as mentioned above, at the time of application | coating by a die-coating method, the liquid crystal composition of this invention will be easy to transfer from a die to an application | coating base material. For this reason, since a liquid crystal composition can be prevented from clogging in the downstream part of die | dye, stable application | coating becomes possible. Therefore, the thickness of a liquid crystal composition layer can be prevented from becoming nonuniform, and also it becomes possible to prevent retardation nonuniformity of a pattern retardation film. Moreover, there is no minimum in the contact angle with respect to the said coating base material, Usually, it is 5 degrees or more.

The contact angle with respect to the coating base material of a liquid crystal composition is measured as follows.

First, the coating base material is placed so that the coating surface of this coating base material is horizontal and upward. Here, a coating surface is a surface to which a liquid crystal composition is apply | coated, and when a coating base material is a film, for example, the main surface of the said film will be a coating surface normally. Then, the liquid crystal composition is dripped at the coating surface of an application | coating base material. An image one second after the dropping is photographed, and a contact angle is obtained from the photographed image by the θ / 2 method. The measurement is performed in an environment of normal temperature and normal pressure. As a measuring apparatus, "Drop Master 500" made from Kyowa Interface Science Co., Ltd. is used, for example.

Means for bringing the stainless steel SUS316L and the contact angle of the liquid crystal composition of the present invention into the coating substrate into the desired range include, for example, controlling the kind and amount of the surfactant, the kind and amount of the solvent, and the solid content concentration of the liquid crystal composition. Etc. can be mentioned.

[9. Pattern retardation film]

By using the liquid crystal composition of this invention, a long pattern retardation film can be manufactured. A long pattern retardation film is provided with the layer (namely, liquid crystal hardened | cured material layer) which consists of hardened | cured material of the liquid crystal composition of this invention, and the said liquid crystal hardened | cured material layer has two or more types of regions which have a different phase difference. Usually, the 2 or more types of area | region which a liquid crystal hardened | cured material layer has is made to form a predetermined pattern. The two or more kinds of regions may be, for example, an isotropic region and a region having anisotropy.

More specifically, the region having anisotropy may be a region that can function as a half wave plate. As for the area | region which can function as a half wave plate, the value of the in-plane phase difference measured by the measurement wavelength 546nm is preferable 225 nm or more, More preferably, 245 nm or more, Furthermore, 285 nm or less are preferable and 265 nm or less are more preferable. .

It is preferable that the in-plane phase difference measured in the measurement wavelength 546nm is almost zero in an isotropic area | region. Specifically, the value of the in-plane retardation measured at the measurement wavelength of 546 nm is preferably 1 nm or more, more preferably 3 nm or more, still more preferably 10 nm or less, and even more preferably 5 nm or less.

In-plane retardation Re denotes the expression I: Re = (nx-ny) × d (where nx is the direction perpendicular to the thickness direction (in-plane direction) and represents the refractive index in the direction giving the maximum refractive index, and ny is the thickness direction. It is a value expressed by the perpendicular | vertical direction (in-plane direction) and showing the refractive index of the direction perpendicular | vertical to the direction of nx, and d represents a film thickness. In-plane retardation can be measured using a commercially available retardation measuring device (for example, "KOBRA-21ADH" manufactured by Oji measurement equipment company, "2D birefringent evaluation system" Photonic Lattice company; WPA-micro ") or the cinnamon method.

The specific shape of the pattern comprised by two or more types of area | regions in a liquid crystal hardened | cured material layer can be selected according to the pixel arrangement | positioning of the liquid crystal panel combined with the pattern retardation film of this invention in a stereoscopic display apparatus. For example, when the stereoscopic display device is a passive stereoscopic display device, the liquid crystal panel usually has two sets of pixel groups (that is, a pixel group for viewing with the right eye and a pixel group for viewing with the left eye). In this case, the pattern which the pattern retardation film has is good also as a pattern whose area | region corresponding to one of these pixel groups is an isotropic area, and the area | region corresponding to the other is an area | region which has anisotropy. More specifically, the pattern in which the several area | region extended in strip shape along the long direction is mentioned preferably.

1 is a plan view schematically showing an example of a pattern that the liquid crystal cured product layer may have. In the example of FIG. 1, the liquid crystal hardened | cured material layer 110 of the pattern retardation film 100 is the area | region 111 (the anisotropic area | region; shown as an oblique part) and the some isotropic area which have some anisotropy. (112) (isotropic regions) are alternately arranged, and thus have a stripe pattern composed of them. Both the anisotropic region 111 and the isotropic region 112 have a strip-like shape extending along its long direction (direction indicated by the coordinate axis X). The width of the anisotropic areas (111) ₍₁₁₁ W) and the width (W ₁₁₂₎ of the isotropic region 112, to be compliant with the pixel size or aspect of the resolution of the liquid crystal panel used can be set appropriately. For example, it is 200 micrometers-260 micrometers in the liquid crystal panel of 20 inches and the resolution (1,600 * 1200 pixels horizontal), and is 280 micrometers-340 micrometers in the liquid crystal panel of 27 inches and the resolution (1920 * 1200 pixels horizontal).

In addition, in this pattern retardation film, a liquid crystal hardened | cured material layer is obtained by hardening the liquid crystal composition of this invention. Therefore, the phase difference nonuniformity in the liquid crystal hardened | cured material layer 110 can be prevented. That is, in any of the anisotropic region 111 and the isotropic region 112, the phase difference can be prevented from being partially nonuniform within each of the regions 111 and 112.

When manufacturing a pattern retardation film, the liquid crystal composition of this invention is apply | coated to an application | coating base material, for example, the liquid crystal composition layer of an uncured state is obtained, a part of this liquid crystal composition layer is hardened to some orientation state, and another part isotropic orientation You may manufacture a pattern retardation film by hardening in a state (namely, a state which is not oriented), and obtaining a liquid crystal hardened | cured material layer. Such a manufacturing method can be performed using a long base film as a coating base material, and since it can manufacture a pattern retardation film as a long film, it is excellent at the point of production efficiency. Here, the "long" film means having a length of at least 5 times or more with respect to the width of the film, preferably having a length of 10 times or more, and specifically, a length that is wound in a roll shape and stored or transported. Say that having.

As an example of the manufacturing method of a pattern retardation film,

i. Manufacturing a mask layer having a light shielding portion for shielding energy rays and a light transmitting portion for transmitting the energy rays on one surface of the base film;

ii. Providing a liquid crystal composition layer in an uncured state on the surface on the side opposite to the mask layer of the base film;

iii. A first curing step of curing a partial region of the liquid crystal composition layer by irradiating an energy ray having a wavelength that is shielded by the light shielding portion from the mask layer side of the base film but which transmits the light transmitting portion,

iv. Changing the alignment state in an uncured region of the liquid crystal composition layer, and

v. 2nd hardening process which irradiates an energy ray from the opposite side to the said mask layer of the said base film, and hardens the area | region which is the uncured state of the said liquid crystal composition layer.

You may manufacture by the manufacturing method which has a.

The pattern retardation film manufactured as mentioned above is normally used after peeling a base film and a mask layer. However, you may use a base film and a mask layer suitably without peeling.

In the manufacturing method of the said pattern retardation film, it is preferable that the base film uses what becomes lower as the contact angle of the liquid crystal composition of this invention as mentioned above. It is for improving application | coating stability of a liquid crystal composition and preventing retardation unevenness more reliably.

As a material of a base film, the material which permeate | transmits energy rays, such as an ultraviolet-ray, can be used to the extent which hardens a liquid crystal composition in the process of hardening the liquid crystal composition layer of an uncured state. Usually, a material having a total light transmittance (measured using a turbidimeter (measured using Nippon Color Industry Co., Ltd., NDH-300A) in accordance with JIS K7361-1997) at 80 mm or more at 1 mm thickness is suitable.

Examples of the material of the base film include chain olefin polymers, cycloolefin polymers, polycarbonates, polyesters, polysulfones, polyethersulfones, polystyrenes, polyvinyl alcohols, cellulose acetate polymers, polyvinyl chlorides, and polymethacrylates. Etc. can be mentioned. Among these, a linear olefin polymer and a cycloolefin polymer are preferable, and a cycloolefin polymer is especially preferable from a viewpoint of transparency, low hygroscopicity, dimensional stability, light weight, etc. In addition, these may be used individually by 1 type and may be used combining two or more types by arbitrary ratios. In addition, you may contain arbitrary compounding agents in the material of a base film, as long as the effect of this invention is not impaired remarkably. As a specific example of a suitable material, "Zeonor 1420" by Nippon Zeon company is mentioned.

The thickness of the base film is preferably 30 µm or more, more preferably 60 µm or more, preferably 300 µm or less, more preferably from the viewpoints of handleability at the time of manufacture, cost of materials, thinning and weight reduction. It is 200 micrometers or less.

The unstretched film which is not extended | stretched may be sufficient as a base film, and the stretched stretched film may be sufficient as it. Moreover, the film which is isotropic or the film which has anisotropy may be sufficient.

The base film may be a film of a single layer structure composed of only one layer, or may be a film of a multilayer structure composed of two or more layers. Usually, from a viewpoint of productivity and cost, the film of a single layer structure is used.

The base film may be one of which one or both surfaces have been subjected to surface treatment. By surface-treating, adhesiveness with the other layer formed directly on the surface of a base film can be improved. As surface treatment, an energy ray irradiation treatment, a chemical treatment, etc. are mentioned, for example.

As a material of a mask layer, you may shield an energy ray, especially an ultraviolet-ray, and may select suitably the composition for masks which is easy to form a pattern.

Usually, resin is used as a mask composition. Examples of the resin include acrylic resins, urethane resins, polyamide resins, cellulose ester resins, polyester resins, polyimide resins, polyamideimide resins, urethane acrylate cured resins, epoxy acrylate cured resins, and polyester acrylate cured resins. At least 1 type of resin chosen from the group which consists of is preferable. By including these resins, a material which shields ultraviolet rays can be maintained even in a high temperature environment, and a stable light shielding portion can be produced. The said resin may be used individually by 1 type, and may be used combining two or more types by arbitrary ratios.

The glass transition temperature of resin contained in the composition for masks is 80 degreeC or more normally, Preferably it is 100 degreeC or more, and is 400 degrees C or less normally, Preferably it is 350 degrees C or less. By making glass transition temperature 80 degreeC or more, heat resistance of a mask layer can be improved and it can prevent that a mask layer deform | transforms at the time of heating of a liquid-crystal composition layer, for example. Moreover, by making glass transition temperature 400 degrees C or less, the solubility of resin can be improved and printing of a composition for masks can be simplified. When the glass transition temperature of resin changes in the state before printing and after forming a mask layer, it is preferable that a glass transition temperature exists in the said range in the state after forming a mask layer.

It is preferable that a composition for masks contains a ultraviolet absorber. As a result, the light shielding portion of the mask layer includes an ultraviolet absorber, so that the ultraviolet light can be stably shielded from the light shielding portion. As a ultraviolet absorber, it is preferable to use at least 1 type of ultraviolet absorber selected from the group which consists of a benzophenone series ultraviolet absorber, a benzotriazole type ultraviolet absorber, and a triazine type ultraviolet absorber. A ultraviolet absorber may be used individually by 1 type, and may be used combining two or more types by arbitrary ratios. The amount of the ultraviolet absorber to be used is usually 5 parts by weight or more, preferably 8 parts by weight or more, more preferably 10 parts by weight or more, and usually 20 parts by weight or less, preferably 100 parts by weight of the monomer, oligomer and polymer in the mask layer. Is 18 parts by weight or less, more preferably 15 parts by weight or less.

The mask composition may further contain a coloring agent, a metal particle, a solvent, a photoinitiator, a crosslinking agent, and other components.

After preparing the base film and the composition for masks, a mask layer is formed on one surface of a base film. As a method of forming a mask layer using the composition for masks, the printing method which is a gravure printing method, the screen printing method, the offset printing method, the rotary screen printing method, the gravure offset printing method, the inkjet printing method, or a combination thereof is preferable. It can be heard. The light transmitting portion and the light blocking portion may be provided by forming, for example, a thin layer and a thick layer of the mask layer.

Moreover, the liquid crystal composition layer of an uncured state is provided in the surface on the opposite side to the said mask layer of a base film. When providing the liquid crystal composition layer of an uncured state, the coating method is used normally, and the die-coating method is used specifically ,.

An example of the structure which apply | coats a liquid crystal composition to a coating base material by the die-coating method is typically shown in FIG. As shown in FIG. 2, in the die-coating method, the liquid crystal composition is discharged from the die 210, and the liquid crystal composition layer 230 is provided by apply | coating this liquid crystal composition to the surface of the base film 220 which is a coating base material. In this example, the liquid crystal composition layer 230 is provided on the surface of the base film 220 while conveying the base film 220 continuously with the conveyance roll 240. At this time, since the liquid crystal composition of this invention has the contact angle of the range mentioned above, it has a high contact angle also with respect to the surface of the die 210. For this reason, the liquid crystal composition is easily transferred from the die 210 to the base film 220. Therefore, a liquid crystal composition becomes difficult to mix in the downstream part 250 of the die 210, and stable application | coating can be implement | achieved. Here, it is preferable that the contact angle of the liquid crystal composition with respect to the surface of the die 210 falls in the range similar to the contact angle of the liquid crystal composition with respect to stainless steel SUS316L mentioned above. In addition, when the contact angle of the liquid crystal composition with respect to the surface of the die 210 differs according to a measuring direction, the width direction of the die 210 (usually, the width direction of this die 210 is the width direction of the base film 220). It is preferable that the contact angle in the direction perpendicular | vertical with respect to the () becomes the same as the contact angle of the liquid crystal composition with respect to stainless steel SUS316L mentioned above.

Although a liquid crystal composition may be directly apply | coated to the surface of a base film, you may apply indirectly to the surface of a base film through an alignment film etc., for example. When an alignment film is used, the liquid crystal compound can be easily oriented in the liquid crystal composition layer.

The alignment layer is formed using, for example, cellulose, silane coupling agent, polyimide, polyamide, polyvinyl alcohol, epoxy acrylate, silanol oligomer, polyacrylonitrile, phenol resin, polyoxazole, cyclized polyisoprene, or the like. Also good. These may be used individually by 1 type and may be used combining two or more types by arbitrary ratios.

The thickness of the alignment film may be a thickness from which the alignment uniformity of the desired liquid crystal composition layer can be obtained, preferably 0.001 µm or more, more preferably 0.01 µm or more, preferably 5 µm or less, and more preferably 2 µm or less. Also, for example, light as shown in Japanese Patent Laid-Open No. 6-289374, Japanese Patent Laid-Open Publication No. 2002-507782, Japanese Patent 4022985, Japanese Patent 4267080, Japanese Patent 4647782, US Patent 5389698, etc. You may make it orientate a liquid crystal compound by the method of using an oriented film and polarizing UV.

In addition, you may make it orientate a liquid crystal compound by means other than the above-mentioned alignment film. For example, you may perform an orientation process like rubbing the surface of a base film directly, without using an oriented film. Usually, the conveyance direction and rubbing direction of a base film become parallel.

Although the process of formation of the said oriented film, rubbing of the surface of a base film, etc. may be performed at any time before the process of a mask layer formation process, in a process, and after a process, it is performed before the process of providing the liquid crystal composition layer of an uncured state. It is preferable.

After performing the process of providing the liquid crystal composition layer of an uncured state, you may perform the orientation process which orientates the liquid crystal compound of a liquid crystal composition layer as needed before a 1st hardening process. As a specific operation in the alignment step, for example, an operation of heating the uncured liquid crystal composition layer to a predetermined temperature in an oven may be mentioned.

The temperature for heating the liquid crystal composition layer in the alignment step is usually 40 ° C or higher, preferably 50 ° C or higher, and usually 200 ° C or lower, preferably 140 ° C or lower. The treatment time in the heat treatment is usually 1 second or more, preferably 5 seconds or more, and usually 3 minutes or less, preferably 120 seconds or less. Thereby, the liquid crystal compound in a liquid crystal composition layer can orientate. Moreover, when a solvent is contained in a liquid crystal composition, since a solvent is normally dried by the said heating, a solvent is removed from a liquid crystal composition layer. Therefore, when performing an orientation process, the drying process of drying a liquid crystal composition layer usually also advances simultaneously. Usually, the orientation axis of a liquid crystal composition layer becomes parallel to a rubbing direction, and an orientation axis becomes a slow axis.

After performing an orientation process as needed, the 1st hardening process which hardens one part area | region of a liquid crystal composition layer is performed. At this time, in the region to be cured, the polymerization reaction proceeds in the liquid crystal composition, and the polymerizable liquid crystal monomer is fixed while maintaining the anisotropic alignment state.

The first curing step is usually performed by irradiation of ultraviolet rays. Irradiation time, irradiation amount, and other conditions of an ultraviolet-ray can be suitably set according to the composition of a liquid crystal composition, the thickness of a liquid crystal composition layer, etc. Irradiation time is the range of 0.01 second-3 minutes normally, and irradiation amount is the range of 0.01 mJ / cm <^2> -50mJ / cm <^2> normally. In addition, irradiation of an ultraviolet-ray may be performed in inert gas, such as nitrogen and argon, for example, and may be performed in air.

After the 1st hardening process, the process of changing the orientation state in the area | region which is an uncured state of a liquid crystal composition layer is performed. As a method of changing an orientation state in this process, you may heat a liquid crystal composition layer above NI point of a liquid crystal composition with a heater, for example. Thereby, since the orientation of a liquid crystal compound molecule becomes random, the area | region which is an uncured state of a liquid crystal composition layer becomes isotropic.

After changing the orientation state in the area | region which is an uncured state of a liquid crystal composition layer, a 2nd hardening process is performed. At this time, in the region to be cured, the polymerization reaction proceeds in the liquid crystal composition, and the polymerizable liquid crystal monomer is fixed while maintaining an isotropic alignment state.

You may perform a 2nd hardening process by irradiation of an ultraviolet-ray. Of ultraviolet irradiation time, irradiation dose, etc. can be suitably set depending on the composition and thickness of the liquid crystal layer composed of liquid crystal composition, the dose is usually in the range of 50mJ / cm ² to 10,000mJ / cm ^2. In addition, irradiation of ultraviolet-ray may be performed in inert gas, such as nitrogen and argon, for example, and may be performed in air. At the time of irradiation, you may continue heating with a heater as needed and irradiate in the state which hold | maintained the isotropic phase of the liquid crystal composition layer of an uncured state.

Moreover, for another specific example of the manufacturing method of a pattern retardation film, a pattern retardation film,

I. Process of providing the liquid-crystal composition layer of the uncured state on one surface of a base film,

ii. A first curing step of irradiating an energy ray through a glass mask provided on the glass with a light-transmitting portion and a light-shielding portion of the stripe pattern on the liquid crystal composition layer, and curing a partial region of the liquid crystal composition layer,

iii. Changing the alignment state in an uncured region of the liquid crystal composition layer, and

iv. 2nd hardening process which irradiates an energy ray to a liquid crystal composition layer, and hardens the area | region which is an uncured state of the said liquid crystal composition layer

What is necessary is just to manufacture by the manufacturing method which has a. In this manufacturing method, you may perform operation similar to the manufacturing method demonstrated above on the conditions similar to the manufacturing method demonstrated above.

In addition, you may use the method shown in Unexamined-Japanese-Patent No. 4-299332 as a 1st hardening process. As the glass mask, for example, chromium sputtering may be performed on the glass surface, and a photoresist may be further applied, the photoresist may be exposed in a stripe shape to expose the photoresist, washed, and etched chromium. Alternatively, for example, a PET film coated with a photosensitive emulsion may be laser drawn in a stripe shape, washed, and the PET film bonded to the glass via an adhesive layer may be used.

In addition, in the manufacturing method mentioned above, as long as a pattern retardation film is obtained, the order of each process is arbitrary. For example, in the manufacturing method illustrated above, after performing the process of providing the liquid crystal composition layer of an uncured state to a base film, you may make it perform the process of producing a mask layer in a base film.

In addition, you may perform processes other than the process mentioned above as needed.

According to the manufacturing method mentioned above, the liquid crystal cured material layer is formed in the surface of a base film in all, and the pattern retardation film of this invention is obtained. In the obtained liquid crystal hardened | cured material layer, each area | region which has a different phase difference forms the pattern which accurately copied the mask pattern of the mask layer or glass mask formed by the light shielding part and the light transmission part. Moreover, in the pattern retardation film obtained by the said method, there exists material continuity between the regions which have a different phase difference. Therefore, the above-described manufacturing method is optically advantageous in that reflection and scattering due to voids between the regions do not occur, and also in terms of mechanical strength in that breakage based on the voids between the regions does not occur. Do.

The thickness of the liquid crystal cured layer of the pattern retardation film can be set to an appropriate thickness so that a desired in-plane retardation Re is obtained in each of the regions of the liquid crystal cured layer according to the refractive index anisotropy (Δn) value of the liquid crystal compound in the liquid crystal composition. Usually, the maximum thickness of a liquid crystal hardened | cured material layer is the range of 1 micrometer or more and 10 micrometers or less.

[10. Stereoscopic display device]

The stereoscopic display device of the present invention includes the pattern retardation film described above. Hereinafter, the specific example of the stereoscopic display device is shown and demonstrated.

3 is an exploded plan view schematically showing an example of a liquid crystal display device that can be used as the stereoscopic display device of the present invention. 3 shows an example in which an observer observes an aspect of viewing an image from the upper side with the right eye and the left eye from a direction perpendicular to the display surface of the stereoscopic display device. The stereoscopic display device is placed vertically on the left side in the drawing (that is, placed so that the display surface is parallel to the vertical direction), so that the viewing direction of the observer observed from the right side in the drawing becomes parallel with the horizontal direction. As shown in FIG. 3, the stereoscopic display device 300 includes a liquid crystal panel 310, a retardation film 320 which is a quarter wave plate, and a pattern retardation film 330 in this order. In the mode of use, the liquid crystal panel 310, the retardation film 320 and the pattern retardation film 330 are usually in an attached state, but are shown in the figure in FIG. 3 for the sake of illustration.

The liquid crystal panel 310 is provided with the light source side polarizing plate 311 which is a linear polarizing plate, the liquid crystal cell 312, and the viewing side polarizing plate 313 which is a linear polarizing plate in order from a light source side. By these, the light transmitted through the liquid crystal panel 310 becomes linearly polarized light. The transmission axis of the viewing side polarizing plate 313 is parallel to the vertical direction as indicated by arrow A ₃₁₃ , and thus the polarization direction of the light emitted from the viewing side polarizing plate 313 also becomes the vertical direction indicated by arrow A ₃₁₃ . .

In the liquid crystal panel 310, pixel regions for displaying a right eye image and pixel regions for displaying a left eye image are set at positions respectively different from the thickness direction. These pixel regions are all band-shaped regions extending in the horizontal direction. The pixel area for displaying the right eye image and the pixel area for displaying the left eye image are areas of constant width, and their arrangement includes a pixel area for displaying the right eye image and a pixel area for displaying the left eye image. The stripe-shaped arrangements are arranged so as to alternate in the vertical direction.

The retardation film 320 is a film capable of functioning as a quarter wave plate with respect to transmitted light, and has the same in-plane retardation in plane. Specifically, the phase difference of the retardation film 320 is usually ± 65 nm, preferably ± 30 nm, more preferably ± 10 nm from the value of 1/4 of the center value in the center value of the wavelength range of the transmitted light. In the case of, it can be said that it can function as approximately 1/4 wavelength to transmitted light. Usually, since light used for image display is visible light, when said requirement is satisfied about wavelength 546nm which is the center value of the wavelength range of visible light, it will function as a substantially 1/4 wavelength plate.

As it is shown by the slow axis, an arrow (A ₃₂₀₎ of the retardation film 320, a direction that forms an angle of -45 ° with respect to the polarization transmission axis of the viewer-side polarizing plate 313. The linearly polarized light transmitted through the viewing-side polarizing plate 313 is converted into circularly polarized light having the rotation direction indicated by the arrow A ₃₄₀ by transmitting the retardation film 320.

The retardation film 320 may use, for example, a stretched film formed of resin. Usually, the resin comprises a polymer (polymer). Examples of the polymer contained in the resin used as the material of the retardation film 320 include chain olefin polymers, cycloolefin polymers, polycarbonates, polyesters, polysulfones, polyethersulfones, polystyrenes, polyvinyl alcohols, and cellulose acetates. Polymer, polyvinyl chloride, polymethacrylate, and the like. Among these, a linear olefin polymer and a cycloolefin polymer are preferable, and a cycloolefin polymer is especially preferable from a viewpoint of transparency, low hygroscopicity, dimensional stability, light weight, etc.

In addition, the resin may use what contains one type of polymer independently, and may use what contains two or more types of polymers combined in arbitrary ratio. Moreover, you may include arbitrary compounding agents in resin, unless the effect of this invention is impaired remarkably.

In addition, as the retardation film 320, a film of a single layer structure may be used, or a film of a multilayer structure may be used.

As an example of the suitable retardation film 320, a commercially available long inclination stretched film, for example, the product name "inclined stretched zenor film" by the Nippon Xeon company, is mentioned.

The pattern retardation film 330 has a band-shaped anisotropic region 331 and a band-shaped isotropic region 332 provided in parallel and uniformly with respect to the horizontal direction. The anisotropic region 331 and the isotropic region 332 have a stripe arrangement arranged alternately in the vertical direction. In addition, when viewed from the thickness direction, the anisotropic region 331 overlaps the pixel region displaying the left eye image of the liquid crystal panel 310, and the isotropic region 332 overlaps the pixel region displaying the right eye image of the liquid crystal panel 310. It is.

The in-plane retardation of the anisotropic region 331 is approximately 1/2 wavelength of transmitted light. The slow axis of the anisotropic region 331 is a direction perpendicular to the polarization transmission axis of the viewing side polarizing plate 313 (that is, the horizontal direction), as indicated by arrow A ₃₃₁ . Thereby, the light which permeate | transmitted the anisotropic region 331 among the circularly polarized light which permeate | transmitted the retardation film 320 is converted into circularly polarized light which has the reversed rotation direction shown by arrow _A351 . On the other hand, the in-plane retardation of the isotropic region 332 is approximately zero, so that the light transmitted through the isotropic region 332 among the circularly polarized light transmitted through the retardation film 320 is transmitted as indicated by arrow A ₃₅₂ . Circular polarization having the same rotational direction as before is obtained.

In this example, the observer observes the display surface of the stereoscopic display device 300 through the polarizing glasses 400. The polarizing glasses 400 include a half wave plate 410, a quarter wave plate 420, and a linear polarizer 430 in this order. The slow axis of the half wave plate 410 is perpendicular to the slow axis of the anisotropic region 331 of the pattern retardation film 330 (ie, parallel to the vertical direction), as indicated by arrow A ₄₁₀ . . The slow axis of the quarter wave plate 420 is perpendicular to the slow axis of the phase difference film 320 of the stereoscopic display device, as indicated by arrow A ₄₂₀ . The polarization transmission axis of the linear polarizing plate 430 is a direction (ie, a horizontal direction) perpendicular to the polarization transmission axis of the viewing side polarizing plate 313 of the stereoscopic display device 300, as indicated by arrow A ₄₃₀ . In addition, the half wave plate 410 is provided in the portion corresponding to the right eye of the polarizing glasses 400, but is not provided in the portion corresponding to the left eye.

By arrange | positioning the wavelength plate of the polarizing glasses 400 in this way, the structure of the wavelength plate which the light R which reaches the right eye and the light L which reaches the left eye passed through is the three-dimensional display apparatus 300, Symmetry is performed between the polarizing glasses 400 as a boundary. As a result, the wavelength dispersion generated at each wavelength plate is eliminated so that the wavelength dispersion of the light R reaching the right eye and the light L reaching the left eye is the same, and the image seen by the right eye and the left eye is the same. There is no difference in color taste.

When light L transmitted through the anisotropic region 331 is incident on a portion corresponding to the left eye of the polarizing glasses 400, the light L is incident on the quarter wave plate 420. The light transmitted through the quarter wave plate 420 is converted into linearly polarized light having a polarization axis in the horizontal direction, and thus can pass through the linear polarizer 430. Therefore, the light L transmitted through the anisotropic region 331 is visually recognized by the user's left eye.

On the other hand, when the light L transmitted through the anisotropic region 331 is incident on the portion corresponding to the right eye of the polarizing glasses 400, the light L passes through the half wave plate 410 and is inverted. Is converted into circularly polarized light having a rotated direction (ie, the direction opposite to arrow A ₄₄₀ ), and is incident on the quarter wave plate 420. The light transmitted through the quarter wave plate 420 is converted into linearly polarized light having a polarization axis in the vertical direction, and thus cannot pass through the linear polarizer 430. Therefore, the light L transmitted through the anisotropic region 331 is not visually recognized by the user's right eye.

In addition, when the light R transmitted through the isotropic region 332 is incident on the portion corresponding to the right eye of the polarizing glasses 400, the light R passes through the half wave plate 410, and the arrow As indicated by A ₄₄₀ , the light is converted into circularly polarized light having an inverted rotational direction and is incident on the quarter wave plate 420. The light transmitted through the quarter wave plate 420 is converted into linearly polarized light having a polarization axis in the horizontal direction, and thus can pass through the linear polarizer 430. Therefore, the light R transmitted through the isotropic region 332 is visually recognized by the user's right eye.

On the other hand, when the light R transmitted through the isotropic region 332 is incident on the portion corresponding to the left eye of the polarizing glasses 400, the light R is incident on the quarter wave plate 420. The light transmitted through the quarter wave plate 420 is converted into linearly polarized light having a polarization axis in the vertical direction, and thus cannot pass through the linear polarizer 430. Therefore, the light R transmitted through the isotropic region 332 is not visually recognized by the user's left eye.

In this manner, the user sees the light passing through the anisotropic region 331 with the left eye and the light passing through the isotropic region 332 with the right eye. Thus, by displaying the image for the left eye in the region corresponding to the anisotropic region 331 of the liquid crystal panel 310 and displaying the image for the right eye in the region corresponding to the isotropic region 332 of the liquid crystal panel 310, the user The stereoscopic image can be visually recognized.

In addition, since the pattern retardation film 330 of the stereoscopic display device 300 is made of the liquid crystal composition of the present invention, the thickness can be made uniform. Therefore, bubble generation at the time of bonding the pattern retardation film 330 with another film can be prevented. In addition, since the pattern retardation film 330 is made of the liquid crystal composition of the present invention, retardation unevenness can be prevented. Therefore, in this stereoscopic image display device, crosstalk can be prevented, and the image to be displayed can be prevented from being partially displayed.

In addition, the stereoscopic display device 300 may be further changed.

For example, the order of the retardation film 320 and the pattern retardation film 330 may be reversed, and the retardation film 320 may be provided on the visual side than the pattern retardation film 330.

For example, the three-dimensional display device 300 may be provided with an antireflection film, an antiglare film, an antiglare film, a hard coating film, a brightness enhancement film, an adhesive layer, an adhesive layer, a hard coating layer, an antireflection film, a protective layer, or the like.

In addition, the configuration of the portion corresponding to the right eye and the left eye of the polarizing glasses 400 is replaced, and the image of the region corresponding to the anisotropic region 331 of the liquid crystal panel 310 and the isotropic region 332. May be performed by replacing the image of the region corresponding to the &quot;

In addition, as long as a three-dimensional image can be displayed suitably, the directions of optical axes, such as a slow axis and a transmission axis, of each optical element may be changed.

Example

Hereinafter, although an Example is shown and this invention is demonstrated concretely, this invention is not limited to a following example, Even if it changes arbitrarily in the range which does not deviate from the Claim of this invention, and its equal range, it is carried out. good. In addition, in the following description, "%" and "part" which represent quantity are a basis of weight unless there is particular notice. In addition, the operation demonstrated below was performed on the conditions of 21 degreeC of room temperature, and 45% of humidity, unless otherwise stated.

[Assessment Methods]

[Measuring method of contact angle]

A flat plate of stainless steel SUS316L, a PET film ("A4100" manufactured by Toyobo Co., Ltd.) or a norbornene resin film ("Zeonor film ZF14-100" manufactured by Nippon Zeon Co., Ltd.) was prepared, and 2 µL of a liquid crystal composition was added dropwise thereto. A picture is taken 1.0 second after dripping. The contact angle is calculated | required from (theta) / 2 method from the image of the image | photographed droplet. At this time, the arithmetic mean roughness Ra of the flat plate of stainless steel SUS316L measured in the observation direction Y perpendicular | vertical to 0.11 micrometer and this measurement direction X of the arithmetic mean roughness Ra measured in the measurement direction X of a contact angle is It had a plane of 0.21 mu m (see Fig. 4). This flat plate is made so that the plane which a said flat plate has may be horizontal and upward, and a liquid crystal composition is dripped at this plane. In addition, the PET film and the norbornene resin film are made so that the main surface may be horizontal and upward, and a liquid crystal composition is dripped at the main surface. As the measuring device, "Drop Master 500" manufactured by Kyowa Interface Science Co., Ltd. is used.

[Evaluation method of phase difference nonuniformity and surface state]

A pattern retardation film is sandwiched between two polarizing plates made of cross nicol and observed. If there is retardation nonuniformity in a pattern retardation film, since the intensity | strength of the light which permeate | transmits a polarizing plate and a pattern retardation film does not become uniform, retardation unevenness can be evaluated by observing the state of the light to transmit. In addition, it is thought that such retardation nonuniformity originates in the thickness nonuniformity of a pattern retardation film. Therefore, according to the said evaluation method using a polarizing plate, the thickness nonuniformity which cannot be observed only by observing a pattern retardation film visually can be evaluated accurately, and also the surface state of a pattern retardation film can be evaluated.

In addition, at the time of application | coating by die coating, it confirms visually whether the liquid splash of the coating liquid generate | occur | produces on the lip of die | dye. If liquid squeezing occurs, the liquid crystal composition where the liquid swells is suddenly transferred to the base film, and there is a high possibility that a large retardation unevenness occurs soon. In view of the stability of the production, it is preferable that such liquid is also absent.

Here, "excellent" that there is no liquid phase on the lip of the die and there is no phase difference unevenness is "good" and that there is phase difference nonuniformity is "good" and that there is liquid phase is "bad".

Example 1

[Production of Liquid Crystal Composition]

(A) 76 parts of LC242 (manufactured by BASF; NI point = 125 ° C; Δn = 0.15 at a wavelength of 546 nm) of the polymerizable liquid crystal monomer, and (B) 15 parts of the following compound 1 which is a polymerizable non-liquid crystal monomer and ATMPT (trimethyl Megaprop F-477 (D) surfactant (D) surfactant containing 9 parts of all propane triacrylates (manufactured by Shin-Nakamura Chemical Co., Ltd.), (C) 3 parts of Irgacure 379 (manufactured by BASF), a photopolymerization initiator, and fluorine. ) 0.1 part and 160 parts of methyl ethyl ketones which are (E) solvents, and 40 parts of 1, 3-dioxolanes were mixed, and the liquid crystal composition for pattern retardation films was produced.

About the produced liquid crystal composition, the contact angle with respect to the flat plate of stainless steel SUS316L, PET film, and norbornene resin film was measured by the method mentioned above. The results are shown in Table 1.

[Production of Pattern Retardation Film]

As a base film, a long PET film ("PET film A4100" by Toyobo Corporation; thickness 100micrometer) was prepared. The liquid crystal composition prepared above was attached to the feeding part of the film conveying apparatus, the rubbing treatment was performed in the long direction parallel to the conveying direction, and the rubbing treatment was carried out while conveying the substrate film. Apply using a die coater. This die coater had a die formed of stainless steel SUS316L. This formed the liquid crystal composition layer of an uncured state as a coating film on the single side | surface of a base film.

With respect to the liquid crystal composition layer, an alignment treatment was performed at 40 ° C. for 2 minutes to align the (A) polymerizable liquid crystal monomer in the liquid crystal composition layer. Then, the weak liquid ultraviolet ray of 15.0mJ / cm <^2> was irradiated with respect to the liquid crystal composition layer through the glass mask from the opposite side to the liquid crystal composition layer of a base film. As said glass mask, the light-transmitting part and the light-shielding part extended in the elongate direction of a base film were arranged in parallel with each other, and what was formed in stripe shape was used. The width of the light transmitting portion of the glass mask was 306.4 μm, and the width of the light blocking portion was 316.0 μm. Although the liquid crystal composition layer remained uncured at the position corresponding to the light shielding portion of the glass mask, the liquid crystal composition layer was cured because the liquid crystal composition layer was exposed at the position corresponding to the light transmitting portion of the glass mask. Thereby, in the exposure part of the liquid crystal composition layer, the area | region ((lambda) / 2 area | region) which has an in-plane phase difference Re which can function as a half wave plate, was formed.

Next, the liquid crystal composition layer was heat-processed at 90 degreeC for 3 second, and the liquid crystal phase of the part (part equivalent to the light shielding part of a glass mask) of the uncured state of a liquid crystal composition layer was transferred to an isotropic phase. While maintaining this state, 300mJ / cm <^2> ultraviolet-ray was irradiated to the liquid crystal composition layer from the liquid crystal composition layer side of a base film, and the uncured part of the liquid crystal composition layer was hardened. As a result, a region (Iso region) having a small in-plane phase difference Re was formed (phase difference Re = 0.7 nm at a measurement wavelength of 546 nm).

In this way, the liquid crystal hardened | cured material layer which has (lambda) / 2 area | region which has in-plane phase difference Re which can function as a 1/2 wave plate, and Iso area | region with small in-plane phase difference Re is in-plane. The pattern retardation film provided with this liquid crystal hardened | cured material layer is a long film which has a laminated constitution of (base film)-(liquid crystal hardened | cured material layer). The λ / 2 region and the Iso region were formed as strip-shaped regions parallel to each other, and the width of each strip was 311.1 μm. In addition, the dry film thickness of the liquid crystal hardened | cured material layer was 10 micrometers at the maximum.

About the obtained pattern retardation film, retardation nonuniformity and surface state were evaluated by the method mentioned above. The results are shown in Table 1.

[Example 2]

As the surfactant (D) containing fluorine, 0.1 part of Futagent 209F (manufactured by Neos) was used. Moreover, the quantity of methyl ethyl ketone which is (E) solvent was changed to 140 parts, and the quantity of 1, 3- dioxolane was changed to 60 parts. Except the above matters, the liquid crystal composition for pattern retardation films was produced like Example 1, and the contact angle was measured. In addition, a pattern retardation film was produced and evaluated in the same manner as in Example 1 using this liquid crystal composition. The results are shown in Table 1.

[Example 3]

As the solvent (E), only 200 parts of methyl ethyl ketone was used. Except the above matters, the liquid crystal composition for pattern retardation films was produced like Example 1, and the contact angle was measured. In addition, a pattern retardation film was produced and evaluated in the same manner as in Example 1 using this liquid crystal composition. The results are shown in Table 1.

Example 4

(A) The quantity of LC242 which is a polymeric liquid crystal monomer was changed to 94 parts. In addition, the quantity of the compound 1 which is (B) a polymeric non-liquid crystal monomer was changed into 5 parts, and the quantity of ATMPT was changed into 1 part. Except the above matters, the liquid crystal composition for pattern retardation films was produced like Example 1, and the contact angle was measured. In addition, a pattern retardation film was produced and evaluated in the same manner as in Example 1 using this liquid crystal composition. The results are shown in Table 1.

[Example 5]

(A) The quantity of LC242 which is a polymeric liquid crystal monomer was changed to 75 parts. In addition, the amount of Compound 1 (B) which is a polymerizable non-liquid crystal monomer was changed to 20 parts, and the amount of ATMPT was changed to 5 parts. Except the above matters, the liquid crystal composition for pattern retardation films was produced like Example 1, and the contact angle was measured. In addition, a pattern retardation film was produced and evaluated in the same manner as in Example 1 using this liquid crystal composition. The results are shown in Table 1.

[Example 6]

(A) The quantity of LC242 which is a polymeric liquid crystal monomer was changed to 85 parts. In addition, the amount of the compound 1 which is the (B) polymerizable non-liquid crystal monomer was changed to 10 parts, and the amount of ATMPT was changed to 5 parts. Except the above matters, the liquid crystal composition for pattern retardation films was produced like Example 1, and the contact angle was measured. In addition, a pattern retardation film was produced and evaluated in the same manner as in Example 1 using this liquid crystal composition. The results are shown in Table 1.

[Example 7]

(A) The quantity of LC242 which is a polymeric liquid crystal monomer was changed to 95 parts. In addition, only 5 parts of Compound 1 was used as (B) polymeric non-liquid crystal monomer. Except the above matters, the liquid crystal composition for pattern retardation films was produced like Example 1, and the contact angle was measured. In addition, a pattern retardation film was produced and evaluated in the same manner as in Example 1 using this liquid crystal composition. The results are shown in Table 1.

Comparative Example 1

As the surfactant (D) containing fluorine, 0.1 part of Futagent 209F (manufactured by Neos) was used. In addition, only 200 parts of methyl ethyl ketones were used as (E) solvent. Except the above matters, the liquid crystal composition for pattern retardation films was produced like Example 1, and the contact angle was measured. In addition, a pattern retardation film was produced and evaluated in the same manner as in Example 1 using this liquid crystal composition. The results are shown in Table 2.

Comparative Example 2

As the surfactant (D) containing fluorine, 0.1 part of Futagent 209F (manufactured by Neos) was used. Further, 40 parts of 1,3-dioxolane and 160 parts of methyl isobutyl ketone were used as the solvent (E). Except the above matters, the liquid crystal composition for pattern retardation films was produced like Example 1, and the contact angle was measured. In addition, a pattern retardation film was produced and evaluated in the same manner as in Example 1 using this liquid crystal composition. The results are shown in Table 2.

[Comparative Example 3]

As the surfactant (D) containing fluorine, 0.1 part of Futagent 209F (manufactured by Neos) was used. Except the above matters, the liquid crystal composition for pattern retardation films was produced like Example 1, and the contact angle was measured. In addition, a pattern retardation film was produced and evaluated in the same manner as in Example 1 using this liquid crystal composition. The results are shown in Table 2.

[Comparative Example 4]

(A) The quantity of LC242 which is a polymeric liquid crystal monomer was changed to 94 parts. In addition, the quantity of the compound 1 which is (B) a polymeric non-liquid crystal monomer was changed into 5 parts, and the quantity of ATMPT was changed into 1 part. Furthermore, 0.1 part of fugentgent 209F was used as surfactant (D) containing fluorine. Except the above matters, the liquid crystal composition for pattern retardation films was produced like Example 1, and the contact angle was measured. In addition, a pattern retardation film was produced and evaluated in the same manner as in Example 1 using this liquid crystal composition. The results are shown in Table 2.

[Review]

As can be seen from Tables 1 and 2, the embodiment where the contact angle with respect to stainless steel SUS316L is higher than 10 ° may make phase difference unevenness smaller than the comparative example where the contact angle with stainless steel SUS316L is less than 10 °. It is possible to obtain a good pattern retardation film.

100: pattern retardation film
110: liquid crystal cured layer
111: anisotropic region
112: isotropic region
210: die
220: base film
230: liquid crystal composition layer
240: conveying roll
300: stereoscopic display device
310: liquid crystal panel
311: light source side polarizing plate
312: liquid crystal cell
313: viewing side polarizer
320: retardation film
330: pattern retardation film
331: anisotropic region
332: isotropic region
400: polarized glasses
410: 1/2 wave plate
420: 1/4 wave plate
430: linear polarizer

Claims (3)

As a liquid crystal composition for a pattern retardation film,
The said liquid crystal composition makes the total amount of (A) polymeric liquid crystal monomer and (B) polymerizable non-liquid crystal monomer 100 weight part, (A) polymeric weight liquid crystal monomer 70 weight part or more and 99 weight part or less, (B) polymerizable 1 part by weight or more and 30 parts by weight or less of the non-liquid crystal monomer, (C) 0.1 part by weight or more and 10 parts by weight or less, (D) 0.01 part by weight or more and 1 part by weight or less of the surfactant, and (E) a solvent,
A liquid crystal composition, wherein the contact angle of the liquid crystal composition to stainless steel SUS316L is 10 ° or more. The method of claim 1,
The said liquid crystal composition is used for the manufacturing method of the pattern retardation film which has apply | coating the said liquid crystal composition to an application base material,
The liquid crystal composition whose contact angle of the said liquid crystal composition with respect to the said coating base material is 30 degrees or less. 3. The method according to claim 1 or 2,
(E) the solvent contains a cyclic ether solvent and a ketone solvent,
The liquid crystal composition whose contact angle of the said liquid crystal composition with respect to stainless steel SUS316L is 15 degrees or more.

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