JP2016114804A - Liquid crystal cell, light control material, laminated glass, manufacturing method of liquid crystal cell, manufacturing method of light control material, and manufacturing method of laminated glass - Google Patents

Abstract

It is possible to effectively avoid the occurrence of spacer crushing and reduce or prevent the occurrence of a portion that cannot be sufficiently rubbed when an alignment layer is produced by rubbing. A liquid crystal cell 15 having a laminated structure of a first liquid crystal alignment layer film 12, a liquid crystal layer 14A, and a second liquid crystal alignment layer film 13, the first and second liquid crystal alignment layer films 12. , 13 are provided with transparent electrodes 22A, 22B and alignment layers 23A, 23B on transparent film materials 21A, 21B. The first and / or second liquid crystal alignment layer films 12 and 13 are provided with spacers 24 for maintaining the distance between the first and second liquid crystal alignment layer films 12 and 13, and the alignment layers 23A and 23B are The spacer 24 is formed by ridges extending in the rubbing direction of the rubbing process. [Selection] Figure 5

Description

  The present invention relates to a light control material that can be used for, for example, an electronic blind that is attached to a window to control the transmission of extraneous light, a liquid crystal cell used for the light control material, and a laminated glass using the light control material.

  Conventionally, various devices relating to a light control material that can be used for, for example, an electronic blind that is attached to a window to control the transmission of external light have been proposed (Patent Documents 1 and 2). One of such light control materials uses liquid crystal. In the light control material using this liquid crystal, a liquid crystal material is produced by sandwiching a liquid crystal material with a transparent film material on which a transparent electrode is produced, and this liquid crystal cell is produced by sandwiching it with a linear polarizing plate. As a result, in this light modulating material, the orientation of the liquid crystal can be changed by changing the electric field applied to the liquid crystal to block or transmit the extraneous light, and further the amount of transmitted light can be changed. To control.

  In such a light control material, it is considered that a spacer is provided on the transparent film material constituting the liquid crystal cell, and the liquid crystal layer is held at a desired thickness by the spacer. Moreover, after producing a spacer, it is possible to produce an alignment layer by producing a thin film such as polyimide and performing a rubbing treatment, and restricting the alignment of the liquid crystal material by this alignment layer.

  By the way, it is conceivable to use such a light control material as an intermediate material of laminated glass, for example. However, when used as an intermediate material for laminated glass in this way, there is a problem that the spacer is crushed by the pressing force when the intermediate material is sandwiched and integrated by the glass plate. In addition to the case where the light control material is used for the laminated glass as described above, the same problem occurs depending on the use conditions. In addition, when the alignment layer is produced by rubbing due to the influence of the spacer, there is a problem that a portion that cannot be sufficiently rubbed locally occurs.

JP 03-47392 A Japanese Patent Laid-Open No. 08-184273

  The present invention has been made in view of such circumstances, effectively avoiding the occurrence of spacer crushing, and reducing and preventing the occurrence of sites that cannot be sufficiently rubbed when an alignment layer is produced by rubbing. The purpose is to be able to.

  The present inventor has made extensive studies to solve the above problems, and has come up with the idea that the spacer is formed by a ridge extending in the rubbing direction, thus completing the present invention.

    Specifically, the present invention provides the following.

(1) A liquid crystal cell having a laminated structure of a first liquid crystal alignment layer film, a liquid crystal layer, and a second liquid crystal alignment layer film,
The first and second liquid crystal alignment layer films are:
A transparent electrode and an alignment layer are provided on the transparent film material,
The first and / or second liquid crystal alignment film is
A spacer is provided to maintain a distance between the first and second liquid crystal alignment layer films;
The alignment layer is formed by a rubbing process,
A liquid crystal cell in which the spacer is formed by a ridge extending in the rubbing direction of the rubbing treatment.

  According to (1), the distance (cell gap) between the liquid crystal alignment layer films is maintained by linear contact, and thereby, the collapse of the spacer can be effectively avoided. Further, in the rubbing process, the shadowed portion of the spacer can be reduced or eliminated. By these, the generation | occurrence | production of the site | part which cannot fully rub can be reduced, and also it can avoid effectively.

  (2) A light control material in which the liquid crystal cell according to (1) is sandwiched between linear polarizing plates.

  According to (2), it is possible to provide a light control material using a liquid crystal cell that effectively avoids the collapse of the spacer and further reduces and avoids the occurrence of sites that cannot be sufficiently rubbed.

  (3) A laminated glass in which the light control material according to (2) is sandwiched and integrated by a plate glass.

  According to (3), the laminated glass can be provided by using the liquid crystal cell that effectively avoids the collapse of the spacer and further reduces and avoids the generation of the portion that cannot be sufficiently rubbed.

(4) A process for producing a first liquid crystal alignment layer film in which a transparent electrode and an alignment layer are prepared in a transparent film material to produce a first liquid crystal alignment layer film;
Producing a second liquid crystal alignment layer film by producing a transparent electrode and an alignment layer on the transparent film material to produce a second liquid crystal alignment layer film;
A lamination step of sandwiching and laminating a liquid crystal material with the first and second liquid crystal alignment layer films,
The step of producing the first and / or second liquid crystal alignment layer film comprises:
A spacer manufacturing step for forming a spacer for maintaining the distance between the first and second liquid crystal alignment layer films on the transparent film material formed by manufacturing the transparent electrode;
An alignment layer manufacturing step of preparing the alignment layer by rubbing a transparent film material formed by manufacturing the spacer,
The manufacturing process of the spacer includes
A method for producing a liquid crystal cell, wherein the spacer is produced by a ridge extending in the rubbing direction of the rubbing treatment.

  According to (4), the distance (cell gap) between the liquid crystal alignment layer films is maintained by linear contact, and thereby, the collapse of the spacer can be effectively avoided. Further, in the rubbing process, the shadowed portion of the spacer can be reduced or eliminated. By these, the generation | occurrence | production of the site | part which cannot fully rub can be reduced, and also it can avoid effectively.

(5) A process for producing a first liquid crystal alignment layer film in which a transparent electrode and an alignment layer are prepared in a transparent film material to produce a first liquid crystal alignment layer film;
Producing a second liquid crystal alignment layer film by producing a transparent electrode and an alignment layer on the transparent film material to produce a second liquid crystal alignment layer film;
A step of laminating a liquid crystal cell in which a liquid crystal material is sandwiched and laminated by the first and second liquid crystal alignment layer films;
A step of laminating a light modulating material for producing a light modulating material by sandwiching the liquid crystal cell with a linear polarizing plate,
The step of producing the first and / or second liquid crystal alignment layer film comprises:
A spacer manufacturing step for forming a spacer for maintaining the distance between the first and second liquid crystal alignment layer films on the transparent film material formed by manufacturing the transparent electrode;
An alignment layer manufacturing step of preparing the alignment layer by rubbing a transparent film material formed by manufacturing the spacer,
The manufacturing process of the spacer includes
A method for producing a light control material, wherein the spacer is produced by a ridge extending in the rubbing direction of the rubbing treatment.

  According to (5), the gap (cell gap) between the liquid crystal alignment layer films is maintained by linear contact, and thereby, the collapse of the spacer can be effectively avoided. Further, in the rubbing process, the shadowed portion of the spacer can be reduced or eliminated. By these, the generation | occurrence | production of the site | part which cannot fully rub can be reduced, and also it can avoid effectively.

(6) A process for producing a first liquid crystal alignment layer film, comprising producing a transparent electrode and an alignment layer on a transparent film material to produce a first liquid crystal alignment layer film;
Producing a second liquid crystal alignment layer film by producing a transparent electrode and an alignment layer on the transparent film material to produce a second liquid crystal alignment layer film;
A step of laminating a liquid crystal cell in which a liquid crystal material is sandwiched and laminated by the first and second liquid crystal alignment layer films;
A step of laminating a light control material for producing a light control material by sandwiching the liquid crystal cell with a linear polarizing plate,
A laminated glass laminating step for sandwiching and integrating the light control material with plate glass,
The step of producing the first and / or second liquid crystal alignment layer film comprises:
A spacer manufacturing step for forming a spacer for maintaining the distance between the first and second liquid crystal alignment layer films on the transparent film material formed by manufacturing the transparent electrode;
An alignment layer manufacturing step of preparing the alignment layer by rubbing a transparent film material formed by manufacturing the spacer,
The manufacturing process of the spacer includes
The manufacturing method of the laminated glass which produces the said spacer with the protruding item | line extended in the rubbing direction of the said rubbing process.

  According to (6), the gap (cell gap) between the films for liquid crystal alignment layers is maintained by linear contact, and thereby the collapse of the spacer can be effectively avoided. Further, in the rubbing process, the shadowed portion of the spacer can be reduced or eliminated. By these, the generation | occurrence | production of the site | part which cannot fully rub can be reduced, and also it can avoid effectively.

  According to the present invention, it is possible to effectively avoid the occurrence of spacer crushing and to reduce or prevent the occurrence of sites that cannot be sufficiently rubbed with respect to the light control material using liquid crystal.

It is a figure which shows the laminated glass which concerns on 1st Embodiment of this invention. It is a figure where it uses for description of the light control material used for the laminated glass of FIG. It is a figure where it uses for description of operation | movement of the light modulation material of FIG. It is a flowchart which shows the manufacturing process of the liquid crystal cell which concerns on the light modulation material of FIG. It is a figure which shows the detailed structure of a spacer. It is a figure where it uses for description of the collapse of a spacer. It is a figure where it uses for description of the site | part which cannot fully rub.

[First Embodiment]
[Laminated glass]
FIG. 1 is a cross-sectional view showing a laminated glass according to the first embodiment of the present invention. The laminated glass 1 is a laminated glass used for a vehicle window, for example, and is configured by sandwiching a light control material 10 between plate glasses 2 and 3 through intermediate layers 4 and 5, respectively. Here, as the glass plates 2 and 3, various materials applicable to this type of laminated glass can be widely applied. The intermediate layers 4 and 5 are configured to function as an adhesive layer between the light control material 10 and the plate glasses 2 and 3, and various configurations applied to this type of laminated glass can be widely applied. You may make it provide the function as a shielding material.

  In the laminated glass 1, the intermediate layers 4 and 5 are provided on the plate glasses 2 and 3, respectively, and laminated with the light control material 10, and then heated and pressurized, whereby the plate glasses 2 and 3 and the adjustment of the glass plates 2 and 3 are performed. The optical material 10 is integrated, and the whole is formed into a desired curved shape. Thereby, the laminated glass 1 is produced so that it can be applied to the rear window of a vehicle, for example, and it is comprised so that transmitted light can be controlled by the light control material 10. FIG. In addition, the manufacturing process of the laminated glass 1 by this has the lamination process which laminates | stacks the plate glass 2 and 3 which each provided the intermediate | middle layers 4 and 5 with the light control material 10, and the heating pressurization process which heats and pressurizes the laminated body by a lamination process. Prepare.

[Light control material]
FIG. 2 is a cross-sectional view showing the light control material. The light control material 10 is formed in a film shape and is used by being attached to, for example, a portion where light control is intended, in addition to the case where it is used for laminated glass. In addition, when sticking to the site | part which aims at such light control, it is the case where it arrange | positions, for example in the window glass of a building, a showcase, an indoor transparent partition etc., and switches transparent and opaque.

  The light control material 10 is a light control material that controls transmitted light using liquid crystal, and a liquid crystal cell 15 is produced by sandwiching a liquid crystal material 14 between liquid crystal alignment layer films 12 and 13. Is sandwiched between the linear polarizing plates 16 and 17. In this embodiment, a TN (Twisted Nematic) type liquid crystal material is applied to the liquid crystal material 14, but various liquid crystals such as a VA (Virtical Alignment) type and an IPS (In-Place-Switching) type are used. Material can be applied. In the light control material 10, a spacer 24 for keeping the thickness of the liquid crystal layer 14 </ b> A of the liquid crystal material 14 constant is provided on the liquid crystal alignment layer films 12 and 13. The linear polarizing plates 16 and 17 are respectively provided with retardation films 18 and 19 for optical compensation on the liquid crystal cell 15 side. The liquid crystal alignment layer films 12 and 13 are formed by sequentially forming electrodes 22A and 22B and alignment layers 23A and 23B on film materials 21A and 21B, respectively. The retardation films 18 and 19 may be omitted as necessary.

  As a result, the dimming material 10 is configured to control the transmission of the external light L1 and switch the state between the transparent state and the non-transparent state as shown in FIG. 3 by changing the applied voltage of the electrodes 22A and 22B. Is done. 3A shows a state in which no voltage is applied between the electrodes 22A and 22B, and FIG. 3B shows a state in which a voltage is applied to the electrodes 22A and 22B. The liquid crystal material 14 is driven by normally white. Instead of this, it may be driven by normally black. In addition, when a liquid crystal material such as an IPS method is used, it is needless to say that the electrodes 22A and 22B are manufactured together on the alignment layer 23A or 23B side. 12 and 13 are configured.

  For example, when the light control material 10 is used by being attached to, for example, a window glass of a building, a showcase, an indoor transparent partition, or the like, the linearly polarizing plate 16 and / or 17 on the side opposite to the liquid crystal cell 15 is used. A protective layer such as a hard coat layer is provided on the surface.

  Here, various transparent film materials having flexibility applicable to the liquid crystal cell 15 can be applied to the film materials 21A and 21B. In this embodiment, the film materials 21A and 21B are made of polycarbonate having hard coat layers formed on both sides. Film material is applied. Although the electrodes 22A and 22B can apply a substantially uniform electric field to the liquid crystal layer 14A and can adopt various configurations that are perceived as transparent, in this embodiment, the electrodes 22A and 22B are transparent by ITO, which is a transparent electrode material. A conductive film is formed on the entire surface of the film materials 21A and 21B. As described above, in the IPS method or the like, the electrodes are patterned by a desired shape.

  The alignment layers 23A and 23B are formed by applying various material layers applicable to the alignment layer such as polyimide and forming a fine line-shaped uneven shape on the surface of the material layer by rubbing using a rubbing roll. . Instead of the alignment layer formed by the rubbing process, the alignment layer may be formed by forming a fine line-shaped uneven shape formed by the rubbing process by the shaping process, or by using the photo-alignment layer. Good.

  Although various resin materials can be widely applied to the spacer 24, in this embodiment, the spacer 24 is made of a transparent resin using a photoresist. In the liquid crystal cell 15, a sealing agent 25 is arranged in a frame shape surrounding the liquid crystal layer 14A, the leakage of the liquid crystal material 14 is prevented by the sealing agent 25, and the liquid crystal alignment layer films 12 and 13 are held together. The Here, as the sealing agent 25, various materials capable of integrally holding the liquid crystal alignment layer films 12 and 13 can be applied while preventing leakage of the liquid crystal material. In this embodiment, for example, an epoxy resin agent is used. A thermosetting resin is applied.

〔Manufacturing process〕
FIG. 4 is a flowchart showing the manufacturing process of the liquid crystal cell 15. In the liquid crystal cell 15, transparent electrodes 22A and 22B made of ITO are formed on the film materials 21A and 21B in the electrode manufacturing step SP1. In the subsequent spacer manufacturing step SP3, the coating liquid (photoresist) according to the spacer 24 is applied, followed by drying, exposure and development, whereby the spacer 24 is manufactured. In addition, when producing the spacer 24 only in one of the films 12 and 13 for liquid crystal aligning layers, spacer production process SP3 is abbreviate | omitted about the film material of the side which does not produce the spacer 24.

  Subsequently, in the alignment layer material layer manufacturing step SP4, the liquid crystal cell 15 is applied with the coating liquid related to the alignment layers 23A and 23B, dried and cured, thereby forming the material layers of the alignment layers 23A and 23B. The Subsequently, in the rubbing step SP5, the liquid crystal cell 15 is subjected to a rubbing process using a rubbing roll to produce a fine line-shaped uneven shape on the surface of the alignment layer material layer, thereby forming alignment layers 23A and 23B.

  Subsequently, in the sealing step SP6, the liquid crystal cell 15 is provided with a sealing agent 25 in a frame shape surrounding the liquid crystal layer 14A on one of the liquid crystal alignment layer films 12 and 13, and a portion surrounded by the sealing agent 25 A liquid crystal material 14 is disposed in the central portion of the. In this state, the liquid crystal cell 15 is laminated so that the other of the liquid crystal alignment layer films 12 and 13 is brought and the liquid crystal alignment layer films 12 and 13 sandwich the liquid crystal material. The sealant is cured. Thereby, the liquid crystal material 15 is sealed to produce the liquid crystal cell 15.

  The liquid crystal cell 15 is provided in the form of a long film in which the film materials 21A and 21B are wound on a roll, and all of these processes SP2 to SP6 or a part of these processes SP2 to SP6 are formed from the roll. 21A and 21B are sequentially executed while being pulled out and conveyed. In this way, each step of the liquid crystal cell 15 is executed by processing a single wafer from an intermediate step as necessary.

[Detailed configuration of spacer]
FIG. 5 is a diagram showing a detailed configuration of the spacer 24. The spacer 24 is formed by a ridge extending in the rubbing direction. Thereby, in this embodiment, generation | occurrence | production of the site | part which cannot fully rub is reduced, and it avoids further. Further, the occurrence of spacer collapse is effectively avoided.

  That is, as shown in FIG. 6 in comparison with FIG. 5, when the liquid crystal alignment layer film 13A is produced by applying a simple cylindrical spacer 24A, the distance between the liquid crystal alignment layer films 12, 13 by point contact ( By maintaining the (cell gap), for example, the spacer 24A may be crushed in the heating and pressing step in the laminated glass manufacturing step. Further, as shown in FIG. 7, a portion that cannot be sufficiently subjected to the rubbing process occurs in the portion X that is a shadow of the spacer 24 </ b> A on the downstream side in the rubbing direction. In addition, such a site | part becomes a fault in a light control material, when an optical characteristic differs from another site | part.

  However, as in this embodiment, when the spacer 24 is formed by a protruding line extending in the rubbing direction, and the spacer 24 by the protruding line is formed in a discontinuous shape, the downstream of the rubbing direction is used. On the side, the shadowed portion of the spacer 24 can be reduced as compared with the conventional case. Further, in the case where the spacer 24 is continuously produced without interruption, the shadowed portion of the spacer 24 can be eliminated. Thereby, in this embodiment, generation | occurrence | production of the local site | part which cannot fully rub can be reduced, and also it can avoid effectively.

  In addition, when the spacers 24 are formed with ridges in this way, the distance (cell gap) between the liquid crystal alignment layer films 12 and 13 is maintained by linear contact, thereby effectively preventing the spacers 24 from being crushed. Can be avoided. In this way, the spacer 24 is produced continuously or intermittently. In addition, when producing intermittently, you may make it shift the location in which the spacer 24 is provided in the extension direction of the spacer 24. FIG.

  More specifically, in this embodiment, the spacer 24 is produced by a ridge having a rectangular cross section so that a sufficient contact area can be ensured at the end surface on the front end side of the spacer 24. The spacers 24 are arranged with a regular pitch or an irregular pitch in the arrangement direction. In the case of arranging with an irregular pitch in this way, it is possible to effectively avoid the generation of moire fringes. Further, when viewed in a plan view, the occupancy by the area occupied by the entire area is made to be 0.5% or more and 12% or less. This is because when the occupation ratio is less than 0.5%, the cell gap changes due to the inability to withstand pressurization during the production of laminated glass. Further, since the optical characteristics of the spacer 24 are different from those of the liquid crystal layer 14A around the spacer 24, if the occupation ratio of the spacer 24 exceeds 12%, the different optical characteristics of the spacer affect the overall optical characteristics. This is because the transmittance and the like deteriorate.

  Further, the spacer 24 is manufactured with a constant width or with an irregular width so as to satisfy the condition of the occupation ratio. The ratio Pav / Wav between the average value Pav of the repeated pitch P and the average value Wav of the width W of the upper end surface of the spacer 24 is 7.3 to 30. Here, the pitch P is 50 μm to 300 μm and the width W is 10 μm to 40 μm.

  The spacer 24 may be meandered in the longitudinal direction or the width thereof may be changed in the longitudinal direction, or may be changed in various ways within a practically uniform rubbing process. By causing meandering and changing the width in this way, the regularity related to the production of the spacer 24 can be relaxed, so that occurrence of interference fringes and the like can be avoided in advance.

  Here, the following table shows the results of confirmation with different spacer shapes. This confirmation is the result of an experiment in which a laminated glass was produced using a liquid crystal cell in which spacers were produced with continuous ridges and a liquid crystal cell in which spacers were produced with a cylindrical shape. In these two liquid crystal cells, the area occupancy ratio of the spacers in the entire area when viewed in plan is set to be the same. When the spacer was a ridge, the collapse of the spacer could be effectively avoided, and good alignment could be ensured by rubbing treatment sufficiently uniformly (indicated by a circle). On the other hand, in the case of a spacer having a cylindrical shape, crushing occurs, and a portion where the rubbing treatment cannot be sufficiently performed on a shadow portion occurs. Thereby, it was found that the orientation was insufficient (indicated by a symbol Δ).

[Other Embodiments]
As mentioned above, although the specific structure suitable for implementation of this invention was explained in full detail, this invention can be variously changed in the range which does not deviate from the meaning of this invention.

  That is, in the above-described embodiment, the case where the spacer is made of a transparent resin made of a photoresist has been described. However, the present invention is not limited to this, and a resin used for shaping such as an ultraviolet curable resin is used to form the alignment layer. The present invention can also be widely applied to a case where it is manufactured by a shaping process integrally or separately from the alignment layer.

  Further, in the above-described embodiment, the case where the film material provided by the roll is sequentially shaped to produce a liquid crystal alignment layer film has been described. However, the present invention is not limited to this, and a single wafer using a lithographic plate is used. The present invention can also be widely applied to a case where a liquid crystal cell is manufactured by performing a shaping process.

DESCRIPTION OF SYMBOLS 1 Laminated glass 2, 3 Plate glass 4, 5 Intermediate | middle layer 10 Light control material 12, 13, 13A Film for liquid crystal aligning layers 14 Liquid crystal material 14A Liquid crystal material layer 15 Liquid crystal cell 16, 17 Linear polarizing plate 18, 19 Retardation film 21A, 21B Film material 22A, 22B Electrode 23A, 23B Alignment layer 24, 24A Spacer 25 Sealing agent

Claims (6)

A liquid crystal cell having a laminated structure of a first liquid crystal alignment layer film, a liquid crystal layer, and a second liquid crystal alignment layer film,
The first and second liquid crystal alignment layer films are:
A transparent electrode and an alignment layer are provided on the transparent film material,
The first and / or second liquid crystal alignment film is
A spacer is provided to maintain a distance between the first and second liquid crystal alignment layer films;
The alignment layer is formed by a rubbing process,
The liquid crystal cell, wherein the spacer is formed by a ridge extending in the rubbing direction of the rubbing treatment. A light control material comprising the liquid crystal cell according to claim 1 sandwiched between linear polarizing plates. A laminated glass in which the light control material according to claim 2 is sandwiched and integrated by plate glass. A process for producing a first liquid crystal alignment layer film for producing a first liquid crystal alignment layer film by producing a transparent electrode and an alignment layer on a transparent film material;
Producing a second liquid crystal alignment layer film by producing a transparent electrode and an alignment layer on the transparent film material to produce a second liquid crystal alignment layer film;
A lamination step of sandwiching and laminating a liquid crystal material with the first and second liquid crystal alignment layer films,
The step of producing the first and / or second liquid crystal alignment layer film comprises:
A spacer manufacturing step for forming a spacer for maintaining the distance between the first and second liquid crystal alignment layer films on the transparent film material formed by manufacturing the transparent electrode;
An alignment layer manufacturing step of preparing the alignment layer by rubbing a transparent film material formed by manufacturing the spacer,
The manufacturing process of the spacer includes
A method for producing a liquid crystal cell, wherein the spacer is produced by a ridge extending in the rubbing direction of the rubbing treatment. A process for producing a first liquid crystal alignment layer film for producing a first liquid crystal alignment layer film by producing a transparent electrode and an alignment layer on a transparent film material;
Producing a second liquid crystal alignment layer film by producing a transparent electrode and an alignment layer on the transparent film material to produce a second liquid crystal alignment layer film;
A step of laminating a liquid crystal cell in which a liquid crystal material is sandwiched and laminated by the first and second liquid crystal alignment layer films;
A step of laminating a light modulating material for producing a light modulating material by sandwiching the liquid crystal cell with a linear polarizing plate,
The step of producing the first and / or second liquid crystal alignment layer film comprises:
A spacer manufacturing step for forming a spacer for maintaining the distance between the first and second liquid crystal alignment layer films on the transparent film material formed by manufacturing the transparent electrode;
An alignment layer manufacturing step of preparing the alignment layer by rubbing a transparent film material formed by manufacturing the spacer,
The manufacturing process of the spacer includes
A method for producing a light control material, wherein the spacer is produced by a ridge extending in a rubbing direction of the rubbing treatment. A process for producing a first liquid crystal alignment layer film for producing a first liquid crystal alignment layer film by producing a transparent electrode and an alignment layer on a transparent film material;
Producing a second liquid crystal alignment layer film by producing a transparent electrode and an alignment layer on the transparent film material to produce a second liquid crystal alignment layer film;
A step of laminating a liquid crystal cell in which a liquid crystal material is sandwiched and laminated by the first and second liquid crystal alignment layer films;
A step of laminating a light control material for producing a light control material by sandwiching the liquid crystal cell with a linear polarizing plate,
A laminated glass laminating step for sandwiching and integrating the light control material with plate glass,
The step of producing the first and / or second liquid crystal alignment layer film comprises:
A spacer manufacturing step for forming a spacer for maintaining the distance between the first and second liquid crystal alignment layer films on the transparent film material formed by manufacturing the transparent electrode;
An alignment layer manufacturing step of preparing the alignment layer by rubbing a transparent film material formed by manufacturing the spacer,
The manufacturing process of the spacer includes
A method for producing a laminated glass, wherein the spacer is produced by a ridge extending in the rubbing direction of the rubbing treatment.

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