JP2006350294A - Optical element for liquid crystal display device, and manufacturing method and device thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical element for liquid crystal display device in which a plurality of photopolymerizable liquid crystal films having a uniform performance are disposed on one sheet of substrate, and to provide a manufacturing method of the optical element and a manufacturing device of the same. <P>SOLUTION: The manufacturing device 10 of the optical element is provided with a stage 4, a light source 1 disposed above the stage 4 and a mask 20 having an opening 20a disposed between the light source 1 and the stage 4. The center of the opening 20a of the mask 20 coincides with the center of light from the light source 1 and the stage 4 is moved relatively for the opening 20a of the mask 20 by a stage drive part 4a. As the result, the photopolymerizable liquid crystal films 8b can be plurally formed in a multiple arrangement at desired positions of the substrate 3 on the stage 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an optical element for a liquid crystal display device obtained by irradiating and fixing light to a photopolymerizable liquid crystal, a manufacturing method thereof, and a manufacturing device thereof.

  In recent years, a liquid crystal display (LCD) attracting attention as a flat panel display is a display element that utilizes electro-optical changes in liquid crystal, and is marketed for notebook PCs and other applications due to its thin, lightweight, and low power consumption characteristics. Has expanded. In recent years, there has been a rapid demand for a liquid crystal display device as a large display for TV, replacing the conventional CRT-TV.

  The liquid crystal display device includes a pair of optical elements and a liquid crystal cell provided between the pair of optical elements. Among these, the optical element is provided on one surface of the base material, a liquid crystal display element compensation plate, a viewing angle improving plate for a liquid crystal display element, an optical phase difference plate, an optical rotator, a λ / 4 plate, and a λ / 2 plate Thus, a wider viewing angle can be obtained. In particular, an optical compensation layer is an indispensable member in a large display for TV use that requires a wide viewing angle.

  Conventionally, an optical compensation layer is configured by pasting a retardation film subjected to a stretching treatment to the outside of a cell (see Patent Documents 1 and 2).

In the case of producing an optical compensation layer with a conventional film, there are problems such as deterioration of optical properties and peeling due to shrinkage over time, and low heat resistance.
Further, the thickness of the optical compensation layer is on the order of several tens of micrometers, and particularly when a plurality of layers are laminated, there is a problem of increasing the thickness.
Therefore, in recent years, a polymerizable liquid crystal material capable of fixing its optical anisotropy by curing has been used (see Patent Document 3).

The liquid crystal layer fixed by photopolymerization exhibits a practically sufficient retardation control function on the order of several μm.
These liquid crystal molecules are fixed by heat or electron beams. The immobilization state is determined by the degree of electron beam irradiation and heating conditions. When immobilization is performed by light irradiation, in-plane illuminance unevenness may be caused by liquid crystal alignment unevenness.
The occurrence of uneven alignment of the liquid crystal becomes a problem when optical compensation is performed uniformly over a wide surface.
JP-A-5-257014 JP-A-7-261025 JP 2004-347698 A

Here, a case where the polymerizable liquid crystal coated on the color filter (CF) provided on the substrate is fixed by exposure will be described.
In manufacturing a liquid crystal display device, it is often applied to a single large glass substrate according to the size of one screen of the liquid crystal display device and to reduce the manufacturing cost.
In particular, along with the recent increase in size of LCD screens, efficient production is being performed by further increasing the number of faces on a large substrate.
The substrate size referred to as the sixth generation is 1600 × 1800 mm, and the seventh generation is 2000 × 2000 mm. Large base materials are usually moved in one or two axes in the X or Y direction depending on the number of impositions and positions, and exposed in several times using a mask using the center of the irradiation area. This step exposure is also effective in preventing uneven illumination.

  The present invention has been made in consideration of such points, and an optical element for a liquid crystal display device having a photopolymerizable liquid crystal film having a uniform characteristic at a desired position on a substrate, a manufacturing method thereof, and a manufacturing device thereof The purpose is to provide.

  The present invention includes a stage on which a base material coated with a photopolymerizable liquid crystal is placed, and a photopolymerizable liquid crystal that is disposed above the stage and irradiates the photopolymerizable liquid crystal of the base material on the stage with light. And a mask having an opening disposed between the stage and the light source, and the center of the opening of the mask coincides with the center of the light from the light source. This is an apparatus for manufacturing an optical element for a liquid crystal display device.

  According to the present invention, the stage is moved relative to the opening of the mask by the stage driving unit, and a plurality of photopolymerizable liquid crystal films that have been subjected to the light irradiation treatment are formed in a multi-sided manner at a desired position of the substrate on the stage. An apparatus for manufacturing an optical element for a liquid crystal display device.

  The present invention includes a step of placing a substrate having a surface coated with photopolymerizable liquid crystal on the stage, and a photopolymerizable liquid crystal of the substrate on the stage from a light source disposed above the stage to a mask. Irradiating light through the opening to fix the photopolymerizable liquid crystal and forming a photopolymerizable liquid crystal film, and the opening center of the mask coincides with the center of the light from the light source. This is a method for manufacturing an optical element for a liquid crystal display device.

  In the present invention, when a photopolymerizable liquid crystal film is formed, the stage is moved relative to the opening of the mask by the stage driving unit, and the photopolymerizable liquid crystal film is irradiated with light at a desired position of the substrate on the stage. A method for producing an optical element for a liquid crystal display device, comprising: forming a plurality of layers in a multifaceted manner.

  The present invention provides an optical element for a liquid crystal display device obtained by the manufacturing method described above, comprising a base material and a photopolymerizable liquid crystal film provided on the base material. It is an optical element.

  The present invention is the optical element for a liquid crystal display device, wherein the photopolymerizable liquid crystal film on the substrate has a two-layer structure.

The present invention is an optical element for a liquid crystal display device, characterized in that an alignment film is provided between a substrate and a photopolymerizable liquid crystal film.

  The present invention is the optical element for a liquid crystal display device, wherein a color filter is provided between the substrate and the photopolymerizable liquid crystal film.

  The present invention is an optical element for a liquid crystal display device, wherein a TFT circuit is provided between a substrate and a photopolymerizable liquid crystal film.

  As described above, according to the present invention, a photopolymerizable liquid crystal film having uniform optical characteristics can be formed on a substrate, and thus an optical element for a liquid crystal display device having a photopolymerizable liquid crystal film can be accurately obtained. It can be manufactured reliably.

  Embodiments of the present invention will be described below with reference to the drawings.

1 to 9 are views showing an optical element for a liquid crystal display device according to the present invention, a manufacturing method thereof, and a manufacturing apparatus thereof.
First, a liquid crystal display device will be described with reference to FIGS.
As shown in FIGS. 2A and 2B, the vertical alignment mode liquid crystal display device 15 is provided between the pair of liquid crystal display device optical elements 16a and 16b and the pair of liquid crystal display device optical elements 16a and 16b. The liquid crystal 17 is provided.

  Among these, one (lower) optical element 16 a is formed on the base 3 such as a glass substrate, the optical compensation layer 8 and the alignment film 7 provided on one surface of the base 3, and the other surface of the base 3. And a polarizing plate 18 provided.

  The other (upper) optical element 16 b is provided on the base 3 such as a glass substrate, the optical compensation layer 8 and the alignment film 7 provided on one surface of the base 3, and the other surface of the base 3. And a polarizing plate 18.

  A TFT circuit 26 is provided on the surface of the optical element 16a on the side of the optical compensation layer 8 of the base material 3, and a color filter (CF) 25 is provided on the surface of the optical element 16b on the side of the optical compensation layer 8 of the base material 3. Is provided.

Next, the optical compensation layer 8 of the optical element 16a and the optical element 16b will be described with reference to FIG.
As shown in FIG. 2B, the optical compensation layer 8 is provided on the substrate 3 and has an alignment film 8a having a certain molecular alignment arrangement, and a first photopolymerizable liquid crystal film 8b provided on the alignment film 8a. And a second photopolymerizable liquid crystal film 8c provided on the first photopolymerizable liquid crystal film 8b.

When each optical element 16a, 16b is manufactured, an alignment film containing a photoalignment material such as chalcone, coumarin, polyvinyl cinnamate, azobenzene, etc. on one surface of the substrate 3 (literature name, latest alignment technology in LCD) 7 The alignment film 7 is aligned by irradiating the alignment film 7 with polarized light.
In general, an alignment film containing polyimide is formed and aligned by rubbing treatment.

  2A, the upper substrate 3, the optical compensation layer 8, and the alignment film 7 from the upper liquid crystal 17 to the lower alignment film 7, the optical compensation layer 8, and the substrate 3, that is, in order from the upper side. The substrate 3, the optical compensation layer 8, the alignment film 7, the liquid crystal 17, the alignment film 7, the optical compensation layer 8, and the substrate 3 constitute a liquid crystal cell 17 a.

Next, an apparatus for manufacturing an optical element for a liquid crystal display device for manufacturing such optical elements 16a and 16b will be described.
As shown in FIG. 1, an optical element manufacturing apparatus for a liquid crystal display device includes a stage 4 on which a substrate 3 such as a glass substrate having a photopolymerizable liquid crystal coated on a surface is placed, and a light disposed above the stage 4. The light source 1 which irradiates is provided.

  Further, the light from the light source 1 is applied to the photopolymerizable liquid crystal on the substrate 3 to fix the photopolymerizable liquid crystal, thereby forming the first photopolymerizable liquid crystal film 8b.

  In this case, as shown in FIG. 1, an alignment film 8 a constituting the optical compensation layer 8 is formed on the substrate 3 placed on the stage 4 by performing an alignment process in advance.

  When the substrate 3 is a substrate for producing the optical element 16a, CF25 is provided in advance on the surface of the substrate 3 on the alignment film 8a side, and the substrate 3 is a substrate for producing the optical element 16b. The TFT circuit 28 is provided in advance on the surface of the substrate 3 on the alignment film 8a side.

In FIG. 1, first, a CF25 or TFT circuit 26 is provided on a substrate 3 in advance, and an alignment film 8a subjected to alignment treatment is provided on the CF25 or TFT circuit 26, and the alignment film 8a is provided on the CF25 or TFT circuit 26. A base material 3 on which is formed is prepared.
Next, a photopolymerizable liquid crystal is applied to the surface of the alignment film 8a on the base material 3, and the base material 3 thus coated with the photopolymerizable liquid crystal is placed on the stage 4 and will be described later. The first photopolymerizable liquid crystal film 8b is formed by irradiating the photopolymerizable liquid crystal with light to fix the photopolymerizable liquid crystal.

  Similar to the method of forming the first photopolymerizable liquid crystal film 8b, the second photopolymerizable liquid crystal film 8c can be formed on the first photopolymerizable liquid crystal film 8b, and thus for the liquid crystal display device. The optical elements 16a and 16b can be manufactured.

  The alignment film 8a constituting the optical compensation layer 8 is not necessarily provided.

  The apparatus for manufacturing an optical element for a liquid crystal display device will be further described with reference to FIG.

In FIG. 1, a mask 20 having an opening 20 a is disposed between the stage 4 and the light source 1.
In this case, the center of the opening 20 a of the mask 20 coincides with the center of the light from the light source 1. Further, the stage 4 can be moved relative to the opening 20a of the mask 20 in the X direction and the Y direction when viewed from the plane by the stage driving unit 4a (see FIGS. 3 to 9).

  3 to 9, the Y direction coincides with the transport direction of the base material 3, and the X direction is a direction orthogonal to the transport direction of the base material 3.

  The light from the light source 1 has an effective irradiation area 21 on the stage 4. Illuminance unevenness occurs between the central area 21a and the peripheral area in the effective irradiation area 21, and among these, the central area 21a is an area having a small illuminance distribution.

  As described above, the stage 4 is moved in the X direction and the Y direction when viewed from the plane by the stage driving unit 4a, so that the stage 4 is relatively relative to the light source 1 and the opening 20a of the mask 20 in the X direction and the Y direction. Move to.

  In this way, the central area 21a of the light transmitted through the opening 20a of the mask 20 can be brought to the desired position of the base material 3 on the stage 4, and the central area 21a of the light is used at the desired position of the base material 3. Then, the first photopolymerizable liquid crystal film 8b can be formed by irradiating the photopolymerizable liquid crystal with light as will be described later.

  In the present embodiment, by moving the stage 4 in the X direction and the Y direction, the photopolymerizable liquid crystal on the single substrate 3 placed on the stage 4 is irradiated with light to cause the X direction and the Y direction. A plurality of first photopolymerizable liquid crystal films 8b arranged in the direction can be formed.

  In this way, by forming a plurality of first photopolymerizable liquid crystal films 8b on the substrate 3 by multi-sided attachment, a multi-sided multi-sided optical element 16A is obtained.

  Next, constituent materials of each part will be described. The substrate 3 is not limited to a glass substrate, and a plastic film may be used.

Examples of plastic films for substrates include polycarbonate polymers, polyester polymers such as polyarylate and polyethylene terephthalate, polypolyimide polymers, polysulfone polymers, polyethersulfone polymers, polystyrene polymers. And films made of thermoplastic polymers such as polyolefin polymers such as polyethylene and polypropylene, polyvinyl alcohol polymers, cellulose acetate polymers, polyvinyl chloride polymers, polymethyl methacrylate polymers, etc. .
The material of the base material is not particularly limited to the film mentioned here, and metal, paper, glass, or the like may be used.

化学式１１で示される液晶性モノマーの場合、Ｘは４〜６（整数）であることが好ましい。
また上記の化合物の２種を混合して使用することも可能である。 The photopolymerizable liquid crystal material for the photopolymerizable liquid crystal films 8b and 8c is not particularly limited, but the presence of polymerizable functional groups at both ends of the molecule provides an optically stable product after curing. Preferred above.
As an example of the polymerizable liquid crystal material, for example, there are compounds represented by the following chemical formulas 1 to 11.

In the case of the liquid crystalline monomer represented by Chemical Formula 11, X is preferably 4 to 6 (integer).
It is also possible to use a mixture of two of the above compounds.

In addition, a photopolymerizable liquid crystal oligomer, a photopolymerizable liquid crystal polymer, or the like can be used as the photopolymerizable liquid crystal films 8b and 8c.
As such a photopolymerizable liquid crystal oligomer or photopolymerizable liquid crystal polymer, conventionally proposed ones can be appropriately selected and used.

  The liquid crystal material is preferably used after being dissolved in a solvent such as an organic solvent. The solvent is not particularly limited as long as it can dissolve the liquid crystal material.

When the liquid crystal material is applied, the liquid crystal material can be applied onto the substrate by a roll coating method, a gravure coating method, a bar coating method, a slide coating method, a die coating method, a slit coating method, a dipping method, or the like.
In the case of using a plastic film, film coating by the ROLL to ROLL method is possible.

When the crystal is fixed with an electron beam and cured, the light emitted from the light source 1 may be an electron beam such as ultraviolet rays.
Specifically, ultraviolet rays (250 to 400 nm) are often used as the electron beam, and in the case of ultraviolet curing, it is desirable that a photopolymerization initiator is added to the photopolymerizable liquid crystal.
Photopolymerization initiators are benzyl (also called bibenzoyl), benzoin isobutyl ether, benzoin isopropyl ether, benzophenone, benzoin benzoic acid, methyl benzoylbenzoate, 4-benzoyl-4'-methyldiphenyl sulfide, benzylmethyl ketal, dimethylaminomethyl Benzoate, 2-n-butoxyethyl-4-dimethylaminobenzoate, isoamyl p-dimethylaminobenzoate, 3,3′-dimethyl-4-methoxybenzophenone, methylobenzoyl formate, 2-methyl-1- (4- (Methylthio) phenyl) -2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butan-1-one, 1- (4-dodecylphenyl)- 2-hydroxy 2-methylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropane Examples include -1-one, 2-chlorothioxanthone, 2,4-diethylthioxanthone, 2,4-diisopropylthioxanthone, 2,4-dimethylthioxanthone, isopropylthioxanthone, 1-chloro-4-propoxythioxanthone, and the like.
In addition to the photopolymerization initiator, a sensitizer can be added to the photopolymerizable liquid crystal.

Next, the operation of the present embodiment having such a configuration will be described.
First, in FIG. 1, a base material 3 is prepared, a color filter 25 or a TFT circuit 26 is provided in advance on one surface of the base material 3, and an alignment film 8 a is formed on the color filter 25 or the TFT circuit 26. The
In this case, the base material 3 having the color filter 25 is a base material for the optical element 16b, and the base material 3 having the TFT circuit 26 is a base material for the optical element 16a.

  Next, the photopolymerizable liquid crystal is applied on the alignment film 8 a of the base material 3, and the base material 3 to which the photopolymerizable liquid crystal is applied is placed on the stage 4.

  In addition, without forming the alignment film 8 a on the substrate 3, the photopolymerizable liquid crystal is applied directly on the color filter 25 or the TFT circuit 26 of the substrate 3, and this substrate is placed on the stage 4. Also good.

  Next, light is emitted from the light source 1, and the light from the light source 1 is irradiated through the opening 20 a of the mask 20 toward the photopolymerizable liquid crystal on the substrate 3 disposed on the stage 4.

In this state, light from the light source 1 is irradiated to the photopolymerizable liquid crystal on the substrate 3 through the opening 20a of the mask 20.
Thus, the first photopolymerizable liquid crystal film 8b can be formed by fixing the photopolymerizable liquid crystal.

  In this way, using the above-described optical element manufacturing apparatus, the first photopolymerizable liquid crystal that is irradiated with the photopolymerizable liquid crystal on the base material 3 by light and is applied to a desired position on the base material 3. A film 8b is formed.

  In the same manner as the manufacturing method of the first photopolymerizable liquid crystal film 8b, the second photopolymerizable liquid crystal film 8c is formed on the first photopolymerizable liquid crystal film 8b, and the alignment film 8a is thus formed on the substrate 3. Then, the optical compensation layer 8 composed of the first photopolymerizable liquid crystal film 8b and the second photopolymerizable liquid crystal film 8c is formed.

  Thereafter, the alignment film 7 is formed on the optical compensation layer 8, and the polarizing plate 18 is provided on the other surface of the substrate 3. Thus, the multifaceted optical element 16 A is obtained.

  Next, the multifaceted optical element 16A is cut for each optical compensation layer 8 to obtain the optical element 16b having the color filter 25 or the optical element 16a having the TFT circuit 26.

  Next, the operation when the plurality of first photopolymerizable liquid crystal films 8b are formed at desired positions of the substrate 3 will be described in detail.

  As described above, the light transmitted through the opening 20a of the mask 20 has the effective irradiation area 21 on the stage 4, and the central portion of the effective irradiation area 21 becomes a central area 21a having a small illuminance distribution (FIG. 3).

  Therefore, the stage drive unit 4a moves the stage 4 in the X direction and the Y direction so that the desired position of the substrate 3 placed on the stage 4 comes to a position corresponding to the central area 21a.

  Here, a case where two first photopolymerizable liquid crystal films 8b are formed on the base material 3 in the X direction will be described.

  First, the base material 3 on the stage 4 is at a position where the central portion thereof corresponds to the central area 21a (FIG. 4).

  Next, the stage 4 is moved to the left in the X direction so that the right side portion of the base material 3 comes to a position corresponding to the central area 21a. In this state, light is irradiated to the first light on the right side portion of the base material 3 A polymerizable liquid crystal film 8b is formed (FIG. 5A).

  Next, the stage 4 is moved rightward in the X direction so that the left side portion of the base material 3 comes to a position corresponding to the central area 21a. In this state, the first light is irradiated on the left side portion of the base material 3 A polymerizable liquid crystal film 8b is formed (FIG. 5B).

  In this way, the two first photopolymerizable liquid crystal films 8b arranged in the X direction on the substrate 3 can be formed.

  Next, a case where two first photopolymerizable liquid crystal films 8b are formed in the Y direction on the substrate 3 will be described.

  First, the stage 4 is located behind the Y direction so that the front portion of the base material 3 comes to a position corresponding to the central area 21a. In this state, light is irradiated and the first photopolymerization is applied to the front portion of the base material 3. A conductive liquid crystal film 8b is formed (FIG. 6A).

  Next, the stage 4 is moved forward in the Y direction so that the rear part of the base material 3 comes to a position corresponding to the central area 21a. In this state, light is irradiated to the first photopolymerization on the rear part of the base material 3 The liquid crystal film 8b is formed (FIG. 6B).

  In this manner, two first photopolymerizable liquid crystal films 8b arranged in the Y direction can be formed on the base material 3.

  Next, the case where two first photopolymerizable liquid crystal films 8b in the X direction and three in the Y direction are formed on the substrate 3 will be described.

As shown in FIGS. 7A and 7B, the light transmitted through the opening 20a of the mask 20 has an effective irradiation area 21 having a central area 21a at the center.
Therefore, the stage 4 is sequentially moved in the X direction and the Y direction, the desired position of the base material 3 is brought to a position corresponding to the central area 21a, and the base material 3 is irradiated with light. A first photopolymerizable liquid crystal film 8b can be formed on the top, two in the X direction and three in the Y direction.

  Similarly, as shown in FIG. 8, the first photopolymerizable liquid crystal film 8 b can be formed on the substrate 3 in which three in the X direction and two in the Y direction are arranged.

  Next, examples of the present invention will be described.

(Preparation of base material 3)
First, the following base material 3 was prepared, and a color filter 25 was provided on the base material 3.
That is, a base material (size 370 × 470 mm, Corning 7059 glass) subjected to appropriate cleaning treatment was prepared, and the color filter 25 was provided on the base material 3.

As a coloring material for the black matrix of the color filter 25 and each pixel portion of red (R), green (G), and blue (B), a pigment-dispersed photoresist was used.
The pigment-dispersed photoresist uses a pigment as a coloring material, adds beads to a dispersion composition (containing a pigment, a dispersant, and a solvent), disperses them with a disperser for 3 hours, and then removes the beads. And a clear resist composition (polymer, monomer, additive, disclosure agent and solvent).
Its composition is shown below.

A paint shaker was used as the disperser.
The prepared black matrix material is washed on the glass substrate according to a conventional method, then applied to a thickness of 1.2 μm by spin coating, pre-baked at 90 ° C. for 3 minutes, and a predetermined pattern is exposed. (100 mJ / cm 2), spray development using 0.05% KOH aqueous solution was performed for 50 seconds, and then post-baking at 200 ° C. for 30 minutes to prepare a black matrix substrate.

  A red (R) pigment-dispersed photoresist is applied onto the above black matrix substrate by spin coating, pre-baked at 80 ° C. for 5 minutes, and alignment exposure (300 mJ) using a predetermined photomask for colored pattern. Spray development using a 0.1% KOH aqueous solution for 60 seconds, followed by post-baking at 200 ° C. for 50 minutes, so that a film thickness of 2.6 μm is formed at a predetermined position with respect to the black matrix pattern. A red (R) pixel pattern was formed.

  Similarly, a green (G) pixel pattern having a film thickness of 2.6 μm was formed at a predetermined position with respect to the black matrix pattern using a green (G) pigment-dispersed photoresist.

  Further, using a blue (B) pigment dispersion type photoresist, a blue (B) pixel pattern having a film thickness of 2.6 μm was formed at a predetermined position with respect to the black matrix pattern, and a color filter was manufactured.

(1) Photoresist and black pigment for black matrix (TM Black # 9560 manufactured by Dainichi Seika Kogyo Co., Ltd.) 14.0 parts by weight Dispersant (Disperbykl 11 manufactured by BYK Chemie Co., Ltd.) 1.2 parts by weight polymer (VR60 manufactured by Showa Polymer Co., Ltd.) 2.8 parts by weight / monomer (SR399 manufactured by Sartomer Co., Ltd.) 3.5 parts by weight additive (L-20 manufactured by Soken Chemical Co., Ltd.) 0.7 Parts by weight / initiator (2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone-1) 1.6 parts by weight initiator (4,4′-diethylaminobenzophenone) 3 parts by weight / initiator (2,4-diethylthioxanthone) 0.1 parts by weight Solvent (ethylene glycol monobutyl ether) 75.8 parts by weight (2) Red (R) pixel resist / red pigment (C.I. I.P R254 (Chromophthal DPP Red BP, manufactured by Ciba Specialty Chemicals) ... 4.8 parts by weight, yellow pigment (CI PY139 (Pariol Yellow D1819, manufactured by BASF)) ... 1.2 parts by weight, dispersant (General Co., Ltd. Solsperse 24000) ... 3.0 parts by weight / monomer (SR399, manufactured by Sartomer Co., Ltd.) ... 4.0 parts by weight / polymer 1 ... 5.0 parts by weight / initiator (Irgacure 907, manufactured by Ciba Geigy Co., Ltd.) 4 parts by weight, initiator (2,2'-bis (o-chlorophenyl) -4,5,4 ', 5'-tetraphenyl-1,2'-biimidazole) ... 0.6 parts by weight, solvent (propylene Glycol monomethyl ether acetate) ... 80.0 parts by weight (3) Green (G) pixel resist / green pigment (CIPG7 (Seika Fastg manufactured by Dainichi Seika) 5316P)) ... 3.7 parts by weight / yellow pigment (CI PY139 (PASFOL Yellow D1819, manufactured by BASF)) ... 2.3 parts by weight / dispersing agent (Solsparse 24000, manufactured by Zeneca) 3 0.0 part by weight / monomer (SR399 manufactured by Sartomer Co., Ltd.) 4.0 parts by weight Polymer 1 ... 5.0 parts by weight initiator (Irgacure 907 manufactured by Ciba Geigy) 1.4 parts by weight initiator (2 , 2'-bis (o-chlorophenyl) -4,5,4 ', 5'-tetraphenyl-1,2'-biimidazole) ... 0.6 parts by weight / solvent (propylene glycol monomethyl ether acetate) ... 80. 0 part by weight (4) Blue (B) pixel resist / blue pigment (CI PB15: 6 (BASF Heliogen Blue L6700F)) ... 4.6 parts by weight purple pigment (C.I. I. PV23 (Clariant Foster Balm RL-NF) ... 1.4 parts by weight / pigment derivative (Solsperse 12000 manufactured by Zeneca) 0.6 parts by weight / dispersant (Solsparse 24000 manufactured by Zeneca) ... 2. 4 parts by weight / monomer (SR399 manufactured by Sartomer Co., Ltd.) 4.0 parts by weight Polymer 1 ... 5.0 parts by weight initiator (Irgacure 907 manufactured by Ciba Geigy) 1.4 parts by weight initiator (2, 2'-bis (o-chlorophenyl) -4,5,4 ', 5'-tetraphenyl-1,2'-biimidazole) ... 0.6 parts by weight / solvent (propylene glycol monomethyl ether acetate) ... 80.0 Part by weight In addition, the above polymer 1 is benzyl methacrylate, styrene, acrylic acid, 2-hydroxyethyl methacrylate = 15.6: 37.0: 30. 5: 16.9 (molar ratio) of 2-methacryloyloxyethyl isocyanate is added to 16.9 mol% of 100 mol% of the copolymer, and the weight average molecular weight is 42500.

(Formation of alignment film 8a)
An alignment film material was provided on the substrate 3 to form an alignment film 8a. AL1254 (manufactured by JSR) as an alignment film material was applied in a thickness of 500 angstroms.
This alignment film was rubbed to provide uniaxial anisotropy to provide an alignment film 8a.

(Formation of the first photopolymerizable liquid crystal film 8b)
As the photopolymerizable liquid crystal material for forming the first and second photopolymerizable liquid crystal films 8b and 8c, RMM34 (manufactured by Merck) having an acrylate group that can be cured by ultraviolet irradiation was used.
20 parts by weight of RMM34 was dissolved in propylene glycol monomethyl ether acetate as a solvent to prepare a retardation layer ink.

The adjusted photopolymerizable liquid crystal ink was applied onto the alignment film 8a on the substrate 3 using a spin coating method.
Subsequently, the base material 3 was heated on a hot plate at 100 ° C. for 5 minutes to remove the residual solvent and develop a liquid crystal structure.
Next, the photopolymerizable liquid crystal is irradiated with ultraviolet rays using the manufacturing apparatus shown in FIG. 1 (500 mJ / cm 2, 365 nm), the liquid crystal structure is fixed, and the first photopolymerizable liquid crystal film 8b made of a retardation layer is formed. Formed.

(Measurement of the first photopolymerizable liquid crystal film 8b)
Nine points in each plane were measured for the retardation of the first photopolymerizable liquid crystal film 8b using the KOBRA-21 series (manufactured by Oji Scientific Instruments). The measurement points are shown in FIG.

As a result of the measurement, the ratio of the phase difference with respect to the point (1) of each point of the first photopolymerizable liquid crystal film 8b was 1, and a phase difference having the same optical characteristics in the plane could be obtained.
In addition, the ratio of the retardation value at the same location of the two first photopolymerizable liquid crystal films 8b is also 1, and it is possible to produce a product having the same characteristics as the single-sided attachment even in the multi-sided attachment.

It is a figure which shows one Embodiment of the manufacturing apparatus of the optical element for liquid crystal display devices by this invention. It is the schematic which shows a liquid crystal display device. It is a top view which shows the effective irradiation area of light. It is a top view which shows the arrangement | positioning relationship between the effective irradiation area of light, and a base material. It is a top view which forms the photopolymerizable liquid crystal film arranged in the X direction on the substrate. It is a top view which forms the photopolymerizable liquid crystal film arranged in the Y direction on the base material. It is a top view which forms the photopolymerizable liquid crystal film located in a line with the X direction and the Y direction on the base material. It is a top view which forms the photopolymerizable liquid crystal film located in a line with the X direction and the Y direction on the base material. It is a figure which shows distribution of the phase difference value which shows the effect of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light source 3 Base material 4 Stage 4a Stage drive part 7 Alignment film 8 Optical compensation layer 8a Alignment film 8b 1st photopolymerizable liquid crystal film 8c 2nd photopolymerizable liquid crystal film 9 Drive control part 10 Optical element manufacturing apparatus 15 Liquid crystal display Device 16A Multi-faceted optical element 20 Mask 20a Aperture 21 Effective irradiation area 21a Central area 25 Color filter 26 TFT circuit

Claims (9)

  A stage on which a base material coated with photopolymerizable liquid crystal is placed, and a photopolymerizable liquid crystal placed on the stage and irradiated with light onto the base material on the stage to fix the photopolymerizable liquid crystal and light. A liquid crystal display comprising: a light source for forming a polymerizable liquid crystal film; and a mask having an opening disposed between the stage and the light source, wherein the center of the opening of the mask coincides with the center of the light from the light source. Equipment for manufacturing optical elements for equipment.   The stage is moved relative to the opening of the mask by a stage driving unit, and a plurality of photopolymerizable liquid crystal films subjected to light irradiation treatment are formed in a multi-sided manner at a desired position of a substrate on the stage. Item 2. An apparatus for manufacturing an optical element for a liquid crystal display device according to Item 1.   A step of placing a base material coated with photopolymerizable liquid crystal on the surface, and a photopolymerizable liquid crystal of the base material on the stage from a light source arranged above the stage through the opening of the mask And a step of fixing a photopolymerizable liquid crystal by irradiating light to form a photopolymerizable liquid crystal film, wherein the center of the opening of the mask coincides with the center of the light from the light source. Method for manufacturing optical element.   When forming the photopolymerizable liquid crystal film, the stage is moved relative to the mask opening by the stage drive unit, and the photopolymerized liquid crystal film that has been irradiated with light is applied to the desired position of the substrate on the stage. 4. The method for manufacturing an optical element for a liquid crystal display device according to claim 3, wherein a plurality of the optical elements are formed.   4. An optical element for a liquid crystal display device obtained by the manufacturing method according to claim 3, comprising: a base material; and a photopolymerizable liquid crystal film provided on the base material. .   6. The optical element for a liquid crystal display device according to claim 5, wherein the photopolymerizable liquid crystal film on the substrate has a two-layer structure.   6. The optical element for a liquid crystal display device according to claim 5, wherein an alignment film is provided between the substrate and the photopolymerizable liquid crystal film.   6. The optical element for a liquid crystal display device according to claim 5, wherein a color filter is provided between the substrate and the photopolymerizable liquid crystal film. 6. The optical element for a liquid crystal display device according to claim 5, wherein a TFT circuit is provided between the substrate and the photopolymerizable liquid crystal film.

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