JP4037690B2 - Liquid crystal display device and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid crystal display device in which a liquid crystal layer is sandwiched by a transparent substrate or the like and a method for manufacturing the same, and is particularly suitable for application to a liquid crystal display panel with high display quality.
[0002]
[Prior art]
Conventionally, as a liquid crystal display (LCD) using an active matrix, a liquid crystal material having a positive dielectric anisotropy is aligned horizontally in a dark state so as to be twisted by 90 degrees between opposing substrates. TN mode liquid crystal display devices are widely used.
[0003]
This TN mode liquid crystal display device has a problem that the viewing angle characteristic is inferior, and various studies have been made to improve the viewing angle characteristic. Therefore, as an alternative method, a liquid crystal material having negative dielectric anisotropy is vertically aligned, and the liquid crystal molecules at the time of voltage application are applied by protrusions and slits provided on the substrate surface without subjecting the alignment film to rubbing treatment. An MVA (Multi-domain Vertical Alignment) system that regulates the tilt direction in a plurality of directions has been developed, and has succeeded in greatly improving the viewing angle characteristics.
[0004]
[Problems to be solved by the invention]
However, in the case of the MVA method as well as the TN mode liquid crystal display device, it is essential to form an alignment film using polyimide or the like as a material in order to vertically align the liquid crystal material (horizontal alignment). In order to form the alignment film, a printing process, a baking process, a cleaning process, and the like are required, which is one of the main causes that hinders a reduction in manufacturing process and cost reduction.
[0005]
The present invention has been made in view of the above-mentioned problems, and realizes alignment regulation such as vertical alignment and horizontal alignment of liquid crystal molecules without providing an alignment film alone, thereby reducing manufacturing steps, manufacturing costs, and materials. Another object of the present invention is to provide a liquid crystal display device that realizes high display characteristics and a method for manufacturing the same.
[0006]
[Means for Solving the Problems]
As a result of intensive studies, the present inventor has conceived the following aspects of the invention.
[0007]
The liquid crystal display device of the present invention is a liquid crystal display device in which a liquid crystal layer is supported by a liquid crystal support, and an alignment regulating layer for regulating alignment of liquid crystal molecules in the liquid crystal layer in a predetermined direction is provided on a surface layer of the liquid crystal support. The alignment regulating layer is formed of an additive mixed in the liquid crystal, the surface of the liquid crystal support is the surface A, the liquid crystal of the liquid crystal layer is the liquid crystal B, and the additive mixed is As additive contaminant C, the amount of surface energy change when surface A gets wet with liquid crystal B is γ _AB , the amount of surface energy change when surface A gets wet with additive contaminant C is γ _AC , and liquid crystal B is additive additive C When γ _BC is the amount of surface energy change when contacting ,
(Γ _AB −γ _AC ) / γ _BC > −1
The alignment regulating layer is formed in a plurality of layers by the additive mixture having a plurality of functional groups with different reactivity added in the liquid crystal .
[0008]
Another aspect of the liquid crystal display device of the present invention is a liquid crystal display device in which a liquid crystal layer is supported by a liquid crystal support, wherein the alignment regulating layer for regulating the alignment of liquid crystal molecules in the liquid crystal layer in a predetermined direction is the liquid crystal support. It is formed on the surface layer of the body, and the alignment regulating layer is formed in a plurality of layers by an additive mixed in the liquid crystal and having a plurality of functional groups having different reactivities .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
-Basic outline of the present invention-
First, the basic outline of the present invention will be described.
The present inventor is based on the idea that a function equivalent to that of a conventional alignment film can be obtained without coating and forming the alignment film, and an additive that enables the liquid crystal molecules to be regulated in a predetermined direction in the liquid crystal. It was conceived that a liquid crystal layer was formed using this liquid crystal. Accordingly, the alignment control layer having substantially the same function as that of the conventional alignment film can be formed almost simultaneously with the formation of the liquid crystal layer without coating and forming the alignment film which has been essential in the conventional liquid crystal display device. Automatic formation on the surface of the layer was realized.
[0010]
In this way, in order to inject a liquid crystal containing additive contaminants and form an alignment control layer on the surface of the liquid crystal layer, the additive contaminants are localized on the surface of the liquid crystal layer and the surface of the liquid crystal support is additively mixed. It is necessary to wet and absorb with objects. Therefore, the present inventor analyzed the relationship between the surface of the liquid crystal support and the additive contaminants, the surface of the liquid crystal support and the liquid crystals, the liquid crystal and the additive contaminants, in order to actually realize the gist of the present invention described above. A so-called qualitative conditional expression between each of the above relationships was devised.
[0011]
Surface A of the liquid crystal substrate is in contact with a surface energy variation gamma _{AB, AC} surface energy change amount when the surface A is wet with additives contaminants C gamma, liquid B is added contaminants C when wet with the liquid crystal B When the surface energy change amount is γ _BC ,
(Γ _AB −γ _AC ) / γ _BC > −1 (1)
It was found that the added contaminant added to the liquid crystal adsorbs on the surface of the liquid crystal support if the above condition is satisfied. As a specific example, the liquid crystal support is a transparent electrode 102, and a state in which the additive contaminant 201 is adsorbed on the surface of the transparent electrode 102 is shown in FIG.
[0012]
Furthermore,
(Γ _AB −γ _AC ) / γ _BC > 1 (2)
If the above condition is satisfied, the added contaminant is adsorbed and diffused on the surface of the liquid crystal support, which is more preferable.
[0013]
Here, in the case where the additive contaminant is composed of two or more kinds of materials, any notable material may be selected and the above conditional expression may be applied.
[0014]
Preferred specific properties of the additive contaminant include at least a part of the additive contaminant having vertical alignment and a chemical bond with the surface of the liquid crystal support, and physical adsorption with respect to the surface of the liquid crystal support. After the physical bonding to the surface of the liquid crystal support, the property that the additive contaminants chemically bond to each other, the monomer material, and the surface of the liquid crystal support Thus, after the physical adsorption, the property of forming a polymer structure as the orientation regulating layer is considered.
[0015]
-Specific embodiments-
Based on the basic outline of the present invention described above, specific embodiments will be described.
In the following embodiments, detailed description will be given with a focus on the formation of the alignment regulating layer particularly when the liquid crystal layer is formed. In each embodiment, the surface energy change amounts of the surface of the liquid crystal support, the liquid crystal, and the additive contaminants all satisfy the above formulas (1) and (2).
[0016]
(First embodiment)
FIG. 2 is a schematic cross-sectional view showing an example of the liquid crystal display device according to the present embodiment based on a comparison with a conventional liquid crystal display device, where (a) shows a conventional example, (b) shows the present embodiment, The common code | symbol shall represent the same structural member.
[0017]
In the conventional liquid crystal display device, as shown in FIG. 2A, transparent electrode films 102 made of ITO are formed on the surfaces of a pair of glass substrates 101, respectively, and alignment regulation is performed on the transparent electrode film 102. For example, a bank-like structure 104 having a height of 1.5 μm and a width of 10 μm is formed. The bank gap is 25 μm.
[0018]
In addition to or instead of the bank-like structure 104, the orientation structure may use a slit or a fine slit formed in the transparent electrode film 102 (Japanese Patent Application No. 2000-295266, S. Kataoka et al., Digest of SID01, p. 1066 (2001), A. Tanaka et al., Digest of SID99, p. 206 (1999), A. Takeda et al., Digest of SID98, p. 1077 (1998) )reference).
[0019]
On the bank-like structure 104, a vertical alignment film 103 is formed. A liquid crystal layer 105 made of, for example, a negative liquid crystal having a thickness of about 4 μm is sandwiched between the vertical alignment films 103, and the liquid crystal molecules 105 a are inclined in the θp direction by the bank-like structure 104.
[0020]
On the other hand, in the liquid crystal display device according to the present embodiment, as shown in FIG. 2B, the liquid crystal layer 105 is formed using the liquid crystal added with the additive contaminant 201 without having the vertical alignment film 103. The In this case, an alignment regulating layer 202 that realizes an efficient and stable vertical alignment is formed on the surface layer of the liquid crystal layer 105. In this case, in addition to the alignment regulating layer 202, a bank-like structure 104 (or the slit or fine slit or the like) is provided as an alignment structure to regulate the alignment of liquid crystal molecules in the θp direction.
[0021]
In this embodiment, a negative liquid crystal is used as the liquid crystal, and a bifunctional acrylate monomer having a liquid crystal skeleton is used as the additive contaminant. An ultraviolet polymerization initiator is further added to the liquid crystal. When the additive mixture 201 adheres to the surface of the transparent electrode film 102 by irradiating the liquid crystal with ultraviolet rays, a polymer structure is formed as an alignment regulating layer 202 on the surface layer of the liquid crystal layer 105. A part of the attached bifunctional acrylate monomer is considered to be chemically bonded to the glass substrate 101 by polymerization. The surface of the liquid crystal support is the transparent electrode film 102 in this embodiment, but a final protective film such as SiN, a glass substrate, or the like is conceivable. In this case, horizontal alignment can also be realized by changing the properties of the monomer. Further, stable and efficient alignment can be realized by graft polymerization (polymer brush) with a monofunctional acrylate monomer having a vertical alignment group.
[0022]
FIG. 3 is a schematic cross-sectional view schematically showing a process in which a liquid crystal to which additive contaminants are added by ultraviolet irradiation is vertically aligned.
From the initial state (FIG. 3A) in which the liquid crystal 301 to which the additive is added is sealed, the alignment of the liquid crystal molecules 105a gradually approaches vertical by the irradiation of the ultraviolet rays 302, and the alignment regulating layer 202 starts to be formed. (FIG. 3B). Then, the liquid crystal molecules 105a are vertically aligned, and the alignment regulating layer 202 is formed almost uniformly (FIG. 3C).
[0023]
Here, the orientation of the liquid crystal molecules can be further stabilized by applying a predetermined voltage to the liquid crystal during the polymerization of the bifunctional acrylate monomer.
[0024]
In addition, by previously modifying the surface of the liquid crystal support using oxygen plasma, excimer UV, or the like, the adsorbing effect of added contaminants is improved. For example, the surface of the liquid crystal support is treated for 1 minute in 500 W oxygen plasma.
[0025]
Further, by previously modifying the surface of the liquid crystal support with a hydrophilic treatment agent such as an alkaline surfactant, the effect of adsorbing added contaminants is improved. Typical surfactants include Arconox and other substrate cleaning agents.
[0026]
(Second Embodiment)
In the present embodiment, a bifunctional acryloyl group monomer and a monofunctional methacryloyl group monomer having a linear alkyl are mixed and used as an additive. An ultraviolet polymerization initiator is further added to the liquid crystal.
[0027]
When the liquid crystal is irradiated with ultraviolet light, as shown in FIG. 4, first, the highly reactive acryloyl monomer is adsorbed on the glass substrate 101 to form the first alignment regulating layer 401. Subsequently, a second orientation regulation layer 402 having a low reactivity of methacryloyl group is formed on the first orientation regulation layer 401. Vertical alignment of liquid crystal molecules can be realized by linear alkyl formed on the surface.
[0028]
(Third embodiment)
In this embodiment, negative liquid crystal is used as the liquid crystal, and silicon halide having linear alkyl is used as the additive contaminant. In this case, the OH group present on the transparent conductive film reacts with the halogen. The silane and oxygen on the glass substrate are chemically bonded to form a linear alkyl on the surface of the liquid crystal support, and the liquid crystal molecules are vertically aligned.
[0029]
(Fourth embodiment)
In this embodiment, the product name Rheodor SP-O10 (sorbitan monooleate), which is a nonionic surfactant manufactured by Kao Corporation, is used as an additive. 2 wt% of SP-O10 is added to the liquid crystal. The surfactant is physically adsorbed on the surface of the glass substrate, and the liquid crystal molecules are vertically aligned. Since SP-O10 is a nonionic surfactant, it has good electrical characteristics.
[0030]
Here, in the case of physical adsorption, the alignment of the liquid crystal molecules becomes relatively unstable. Therefore, by annealing near the NI (Nematic Isolotropic) point, the alignment of the liquid crystal can be stabilized without breaking the alignment.
[0031]
(Fifth embodiment)
In this embodiment, 2 wt% of the product name SP-O10 of Kao Corporation in which an acryloyl group is added to a polar group such as sorbitan is added to the liquid crystal. Further, about 1 wt% of the photopolymerization initiator is added to the whole. By irradiation with ultraviolet rays, acryloyl groups, and acryloyl groups and the surface of the liquid crystal support are chemically bonded. Moreover, by irradiating ultraviolet rays while applying a voltage to the liquid crystal, the monomer is polymerized in accordance with the liquid crystal alignment and the alignment is stabilized.
[0032]
(Sixth embodiment)
In the present embodiment, 0.3 wt% of a bifunctional acrylate monomer having a liquid crystal skeleton as an additive is mixed with liquid crystal. About 2 wt% photopolymerization initiator is added to the bifunctional acrylate monomer. 2 wt% of Kao Corporation product name SP-O10 is added as an additive. The liquid crystal is vertically aligned due to the added contaminants. By irradiating ultraviolet rays while applying a voltage to the liquid crystal, the acrylate monomer is polymerized along the liquid crystal alignment, and the alignment is stabilized.
[0033]
(Seventh embodiment)
In the present embodiment, a monofunctional acrylate monomer having a liquid crystal skeleton and an acrylate monomer having three or more functional groups are mixed in the liquid crystal. Further, about 1 wt% of the photopolymerization initiator is added to the whole. The orientation is stabilized by the trifunctional acrylate monomer. Further, the acrylate monomer is polymerized in accordance with the liquid crystal alignment by irradiating the liquid crystal with ultraviolet rays while applying a voltage.
[0034]
(Eighth embodiment)
In this embodiment, alkyl is added as a side chain, and an acid anhydride is added as a main chain to the liquid crystal, and polymerization is performed in the liquid crystal. Thereby, stable alignment of liquid crystal molecules can be realized. Further, a more stable alignment of liquid crystal molecules can be realized by adsorbing a polymer having a side chain of an alkyl compatible with a liquid crystal and an acid anhydride as a main chain to the surface of the liquid crystal support.
[0035]
As described above, according to the embodiments of the present invention, it is possible to realize alignment regulation such as vertical alignment and horizontal alignment of liquid crystal molecules without providing an alignment film alone, thereby reducing manufacturing processes, manufacturing costs, and materials. However, high display characteristics can be realized.
[0036]
Hereinafter, various aspects of the present invention will be collectively described as supplementary notes.
[0037]
(Supplementary note 1) A liquid crystal display device in which a liquid crystal layer is supported by a liquid crystal support,
An alignment regulating layer that regulates alignment of liquid crystal molecules in the liquid crystal layer in a predetermined direction is formed on a surface layer of the liquid crystal support,
The liquid crystal display device, wherein the alignment regulating layer is formed by an additive mixed in the liquid crystal.
[0038]
(Supplementary note 2) The liquid crystal display device according to supplementary note 1, wherein the additive contaminant has a property of chemically bonding to a surface of the liquid crystal support.
[0039]
(Supplementary note 3) The liquid crystal display device according to supplementary note 1, wherein the additive contaminant has a property of being physically bonded to the surface of the liquid crystal support and then chemically bonded to the surface.
[0040]
(Supplementary note 4) The liquid crystal display device according to supplementary note 1, wherein the additive contaminant has a property that the additive contaminants are chemically bonded to each other after being physically adsorbed to the surface of the liquid crystal support.
[0041]
(Supplementary note 5) The liquid crystal display device according to supplementary note 1, wherein the additive contaminant is a nonionic surfactant having a property of physical adsorption to the surface of the liquid crystal support.
[0042]
(Supplementary note 6) The supplementary note 1 is characterized in that the additive contaminant includes a monomer material and forms a polymer structure as the alignment regulating layer after physical adsorption to the surface of the liquid crystal support. The liquid crystal display device described.
[0043]
(Supplementary note 7) The liquid crystal display device according to any one of supplementary notes 1 to 6, wherein the additive mixture is made of two or more kinds of materials, and at least one kind has a vertical alignment.
[0044]
(Supplementary note 8) The liquid crystal display device according to supplementary note 6, wherein the additive contaminant has two or more kinds of functional groups having different reactivities.
[0045]
(Supplementary note 9) The surface of the liquid crystal support is surface A, the liquid crystal of the liquid crystal layer is liquid crystal B, and the additive is C.
The surface energy change amount when the surface A gets wet with the liquid crystal B is γ _AB , the surface energy change amount when the surface A gets wet with the additive contaminant C is γ _AC , and the surface energy when the liquid crystal B comes into contact with the additive contaminant C When the amount of change is γ _BC ,
(Γ _AB −γ _AC ) / γ _BC > −1
The liquid crystal display device according to any one of appendices 1 to 8, wherein:
[0046]
(Supplementary Note 10) The surface of the liquid crystal support is surface A, the liquid crystal of the liquid crystal layer is liquid crystal B, and the additive is C.
The surface energy change amount when the surface A gets wet with the liquid crystal B is γ _AB , the surface energy change amount when the surface A gets wet with the additive contaminant C is γ _AC , and the surface energy when the liquid crystal B comes into contact with the additive contaminant C When the amount of change is γ _BC ,
(Γ _AB −γ _AC ) / γ _BC > 1
The liquid crystal display device according to any one of appendices 1 to 8, wherein:
[0047]
(Additional remark 11) The orientation structure for controlling alignment of the liquid crystal molecule of the said liquid-crystal layer is further provided in the surface of the said liquid-crystal support body, Any one of Additional remark 1-10 characterized by the above-mentioned. Liquid crystal display device.
[0048]
(Supplementary note 12) The liquid crystal display device according to any one of supplementary notes 1 to 11, wherein the liquid crystal layer is made of negative liquid crystal, and liquid crystal molecules are vertically aligned when no voltage is applied.
[0049]
(Additional remark 13) It is a manufacturing method of the liquid crystal display device which supports a liquid crystal layer with a liquid crystal support body,
A liquid crystal formed by adding an additive that has a property of regulating the alignment of liquid crystal molecules in a predetermined direction is injected into the liquid crystal support, and the surface of the liquid crystal support has an alignment control layer made of the additive. A method of manufacturing a liquid crystal display device, comprising forming the liquid crystal layer.
[0050]
(Supplementary note 14) The method for manufacturing a liquid crystal display device according to supplementary note 13, wherein the additive contaminant has a property of chemically bonding to a surface of the liquid crystal support.
[0051]
(Supplementary note 15) The liquid crystal display device according to supplementary note 13, wherein the additive contaminant has a property of being physically adsorbed to the surface of the liquid crystal support and then chemically bonded to the surface. Method.
[0052]
(Supplementary note 16) The liquid crystal display device according to supplementary note 13, wherein the additive contaminant has a property that the additive contaminant is chemically bonded to the surface of the liquid crystal support and then chemically bonded to each other. Production method.
[0053]
(Supplementary note 17) The method for manufacturing a liquid crystal display device according to supplementary note 13, wherein the additive contaminant is a nonionic surfactant having a property of physical adsorption to the surface of the liquid crystal support.
[0054]
(Supplementary note 18) The supplementary note 13 is characterized in that the additive contaminant includes a monomer material and forms a polymer structure as the alignment regulating layer after physical adsorption to the surface of the liquid crystal support. The manufacturing method of the liquid crystal display device of description.
[0055]
(Supplementary note 19) The surface of the liquid crystal support is surface A, the liquid crystal of the liquid crystal layer is liquid crystal B, and the additive is C.
Surface energy when the surface A is in contact with a surface energy variation gamma _{AB, AC} surface energy change amount when the surface A is wet with additives contaminants C gamma, liquid B is added contaminants C when wet with the liquid crystal B When the amount of change is γ _BC ,
(Γ _AB −γ _AC ) / γ _BC > −1
19. The method for manufacturing a liquid crystal display device according to any one of appendices 13 to 18, wherein:
[0056]
(Supplementary note 20) The surface of the liquid crystal support is surface A, the liquid crystal of the liquid crystal layer is liquid crystal B, and the additive is C.
The surface energy change amount when the surface A gets wet with the liquid crystal B is γ _AB , the surface energy change amount when the surface A gets wet with the additive contaminant C is γ _AC , and the surface energy when the liquid crystal B comes into contact with the additive contaminant C When the amount of change is γ _BC ,
(Γ _AB −γ _AC ) / γ _BC > 1
19. The method for manufacturing a liquid crystal display device according to any one of appendices 13 to 18, wherein:
[0057]
【The invention's effect】
According to the present invention, it is possible to achieve alignment regulation such as vertical alignment and horizontal alignment of liquid crystal molecules without providing an alignment film alone, and to achieve high display characteristics, while reducing manufacturing processes, manufacturing costs, and materials. A possible liquid crystal display device is realized.
[Brief description of the drawings]
In the liquid crystal display device of the present invention, FIG. 1 is a schematic view showing a state in which additive contaminants added to a liquid crystal are adsorbed on the surface of a liquid crystal support.
FIG. 2 is a schematic cross-sectional view showing an example of a liquid crystal display device according to the present invention based on a comparison with a conventional liquid crystal display device.
FIG. 3 is a schematic cross-sectional view schematically showing a process in which liquid crystals to which additive contaminants are added by ultraviolet irradiation are vertically aligned.
FIG. 4 is a schematic diagram showing a state in which two kinds of orientation regulating layers are formed on the surface of a glass substrate in the second embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 101 Glass substrate 102 Transparent electrode film 103 Vertical alignment film 104 Bank-like structure 105 Liquid crystal layer 105a Liquid crystal molecule 201 Additive inclusion 202 Orientation restriction layer 301 Liquid crystal 302 with addition of addition substance UV 401 First alignment restriction layer 402 Second Orientation restriction layer

Claims (12)

A liquid crystal display device in which a liquid crystal layer is supported by a liquid crystal support,
An alignment regulating layer that regulates alignment of liquid crystal molecules in the liquid crystal layer in a predetermined direction is formed on a surface layer of the liquid crystal support,
The alignment regulating layer is formed by an additive mixed in the liquid crystal,
The surface of the liquid crystal support is the surface A, the liquid crystal of the liquid crystal layer is the liquid crystal B, and the additive is C.
The surface energy change amount when the surface A gets wet with the liquid crystal B is γ _AB , the surface energy change amount when the surface A gets wet with the additive contaminant C is γ _AC , and the surface energy when the liquid crystal B comes into contact with the additive contaminant C When the amount of change is γ _BC ,
(Γ _AB −γ _AC ) / γ _BC > −1
Meet the,
The liquid crystal display device , wherein the alignment regulating layer is formed in a plurality of layers by the additive mixture having a plurality of functional groups with different reactivity added to the liquid crystal.
A liquid crystal display device characterized by that. (Γ _AB −γ _AC ) / γ _BC > 1
The liquid crystal display device according to claim 1, wherein: The additive contaminants are a bifunctional acrylate monomer and a monofunctional acrylate monomer,
The alignment control layer, the liquid crystal display device according to claim 1 or 2, characterized in that it is formed by copolymerization of 2-functional acrylate monomer and a monofunctional acrylate monomers. A liquid crystal display device in which a liquid crystal layer is supported by a liquid crystal support,
An alignment regulating layer that regulates alignment of liquid crystal molecules in the liquid crystal layer in a predetermined direction is formed on a surface layer of the liquid crystal support,
The liquid crystal display device, wherein the alignment regulating layer is formed in a plurality of layers by an additive mixed in the liquid crystal and having a plurality of functional groups having different reactivity. The additive contaminants, the liquid crystal display device according to any one of claims 1 to 4, characterized in that it has the property of chemically binding to the surface of the liquid crystal substrate. The liquid crystal according to any one of claims 1 to 4 , wherein the additive contaminant has a property of chemically adsorbing to the surface after being physically adsorbed to the surface of the liquid crystal support. Display device. The additive contaminants, after physically adsorbed to the surface of the liquid crystal substrate, between the additive contaminants according to any one of claims 1 to 4, characterized in that it has the property of chemically binding Liquid crystal display device. The additive contaminants comprises monomer material, after physically adsorbed to the surface of the liquid crystal support any of claims 1-4, characterized in that said is to form a polymer structure as an alignment regulating layer 2. A liquid crystal display device according to item 1. A method of manufacturing a liquid crystal display device in which a liquid crystal layer is supported by a liquid crystal support,
Injecting a liquid crystal formed by adding an additive having the property of regulating the alignment of liquid crystal molecules in a predetermined direction into the liquid crystal support,
The surface of the liquid crystal support is the surface A, the liquid crystal of the liquid crystal layer is the liquid crystal B, and the additive is C.
The surface energy change amount when the surface A gets wet with the liquid crystal B is γ _AB , the surface energy change amount when the surface A gets wet with the additive contaminant C is γ _AC , and the surface energy when the liquid crystal B comes into contact with the additive contaminant C When the amount of change is γ _BC ,
_{(Γ AB -γ AC) / γ} BC> -1
In order to satisfy the above, the liquid crystal layer having an alignment control layer made of the additive mixture on the surface layer of the liquid crystal support ,
Method of manufacturing a liquid crystal display device characterized by forming the alignment control layer was added in the liquid crystal, the plurality of layers by the added pressure contaminants having different reactivities more functional groups. (Γ _AB −γ _AC ) / γ _BC > 1
The method of manufacturing a liquid crystal display device according to claim 9 , wherein: The additive contaminants are a bifunctional acrylate monomer and a monofunctional acrylate monomer,
The method for manufacturing a liquid crystal display device according to claim 9 or 10 , wherein the alignment regulating layer is formed by copolymerization of a bifunctional acrylate monomer and a monofunctional acrylate monomer. A method of manufacturing a liquid crystal display device in which a liquid crystal layer is supported by a liquid crystal support,
A liquid crystal having a property of regulating alignment of liquid crystal molecules in a predetermined direction and added with an additive mixture having a plurality of functional groups having different reactivity is injected into the liquid crystal support, and is applied to the surface layer of the liquid crystal support. A method of manufacturing a liquid crystal display device, comprising: forming the liquid crystal layer having an alignment control layer formed by laminating a plurality of layers made of the additive mixture.

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