JP2024015005A - Dimming device, laminate for dimming device and dimming cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dimming device, a laminate for a dimming device and a dimming cell, which can suppress generation of a Newton ring while suppressing generation of a liquid crystal accumulation as a phenomenon that a large amount of a liquid crystal is locally present.

SOLUTION: A dimming device 10 includes a first transparent substrate 11, a second transparent substrate 12, a dimming cell 20 disposed between the first transparent substrate 11 and the second transparent substrate 12, a first intermediate film 13 disposed between the first transparent substrate 11 and the dimming cell 20, a second intermediate film 14 disposed between the second transparent substrate 12 and the dimming cell 20, and a film 33 disposed between the dimming cell 20 and the first intermediate film 13. An air gap layer G is provided between the dimming cell 20 and the film 33, and an antireflection layer 37 is provided at a position facing the air gap layer G.

SELECTED DRAWING: Figure 3

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present disclosure relates to a light control device, a laminate for a light control device, and a light control cell.

Conventionally, light control members that can be used in combination with light-transmitting members such as windows and for electronic blinds to control the transmission of external light, and light control devices using such light control members have been proposed. (For example, see Patent Documents 1 and 2). A liquid crystal film including a liquid crystal layer is known as one of such light control members. This liquid crystal film is produced by sandwiching a liquid crystal material between transparent resin base materials containing transparent electrodes, and further sandwiching the liquid crystal material between linear polarizing plates. The liquid crystal film can change the orientation of the liquid crystal by changing the electric field applied between the transparent electrodes, thereby controlling the amount of external light transmitted.

Patent No. 6135816 JP2017-187810A

When using such a liquid crystal film as a light control member that can be used for automobile roof windows, side windows, etc., it is preferable to sandwich the liquid crystal film between a pair of glasses with an interlayer interposed therebetween to form a laminated glass. be. However, with laminated glass sandwiching a liquid crystal film, if the pressure applied to the surface is not uniform when each component is crimped together, or if the shape of the glass or interlayer film used does not match on the top and bottom, the interlayer film or liquid crystal When the film wrinkles, etc., the uneven distribution of liquid crystal tends to cause liquid crystal accumulation, which is a phenomenon in which there is a large amount of liquid crystal locally, which deteriorates the quality and appearance of laminated glass with a light control function. There's a problem. On the other hand, it has been considered to provide a void layer within the laminated glass in order to uniformly disperse the liquid crystal within the plane of the laminated glass, but in this case, interference unevenness (Newton rings) occurs in the laminated glass. There is a risk.

This embodiment describes a light control device, a laminate for a light control device, and a light control device that can suppress the generation of Newton rings while suppressing the generation of liquid crystal pools, which is a phenomenon where a large amount of liquid crystal exists locally. Provide a light cell.

The light control device according to the present embodiment includes a first transparent substrate, a second transparent substrate, a light control cell disposed between the first transparent substrate and the second transparent substrate, and the first transparent substrate. and the light control cell; a second intermediate film located between the second transparent substrate and the light control cell; and the light control cell and the first intermediate film. a film disposed between the light control cell and the film, a void layer is provided between the light control cell and the film, and an antireflection layer is provided at a position facing the void layer.

In the light control device according to this embodiment, the antireflection layer may be provided on the light control cell.

In the light control device according to this embodiment, the antireflection layer may be provided within the light control cell.

In the light control device according to this embodiment, the antireflection layer may be provided on the film.

In the light control device according to this embodiment, a spacer may be arranged in the void layer between the light control cell and the film.

The light control device according to the present embodiment includes a first transparent substrate, a second transparent substrate, a light control cell disposed between the first transparent substrate and the second transparent substrate, and the first transparent substrate. and the light control cell; a second intermediate film located between the second transparent substrate and the light control cell; and the light control cell and the first intermediate film. an antireflection layer disposed between the light control cell and the antireflection layer, a void layer is provided between the light control cell and the antireflection layer, and the antireflection layer is located at a position facing the void layer. It is provided.

The laminate for a light control device according to the present embodiment includes a first base material, a first transparent electrode, a second transparent electrode, a second base material, the first transparent electrode, and the second transparent electrode. A light control cell having a liquid crystal layer disposed therebetween, and an antireflection layer disposed on the first base material of the light control cell.

The laminate for a light control device according to this embodiment includes a film and an antireflection layer disposed on the film.

The light control cell according to the present embodiment is arranged between a first base material, a first transparent electrode, a second transparent electrode, a second base material, and the first transparent electrode and the second transparent electrode. a liquid crystal layer, and the first base material is an antireflection layer.

According to the embodiments of the present disclosure, it is possible to suppress the occurrence of Newton's rings while suppressing the occurrence of liquid crystal pooling, which is a phenomenon where a large amount of liquid crystal exists locally.

FIG. 1 is a perspective view showing a light control device according to one embodiment. FIG. 2 is a cross-sectional view showing a light control device according to one embodiment. FIG. 3 is an exploded perspective view showing a light control device according to one embodiment. FIGS. 4(a) to 4(d) are cross-sectional views showing a method of manufacturing a dimming cell according to an embodiment. 5(a) to 5(d) are cross-sectional views showing a method of manufacturing a dimming cell according to one embodiment. FIGS. 6(a) to 6(c) are cross-sectional views showing a method of manufacturing a light control device according to an embodiment. FIGS. 7(a) to 7(c) are cross-sectional views showing the effect when the liquid crystal accumulation in the light control cell is cleared after manufacturing the light control device. FIGS. 8A and 8B are cross-sectional views showing the effect when light enters the light control device. FIG. 9 is a sectional view showing a light control device according to a first modification. FIG. 10 is a sectional view showing a light control device according to a second modification. FIG. 11 is a sectional view showing a light control device according to a third modification. FIG. 12 is a sectional view showing a light control device according to a fourth modification. FIG. 13 is an exploded perspective view showing a light control device according to a fifth modification.

An embodiment will be described below with reference to FIGS. 1 to 8.

The light control device 10 described below can be applied to various technical fields where adjustment of light transmittance is required, and the scope of application is not particularly limited. The light control device 10 is used to control the light of a part such as a window glass of a building, a showcase, an indoor transparent partition, a vehicle window, etc. (a part where outside light enters, for example, the front, side, rear, etc.) They are placed on windows such as roofs, etc., and can control the amount of light incident on the inside of buildings, vehicles, etc.

Note that the light control device 10 described below is merely an example of one embodiment. Therefore, for example, some of the elements listed below as components of the light control device 10 may be replaced with other elements, or may not be included. Further, elements not listed below may be included as constituent elements of the light control device 10. Further, in the drawings, there are some parts whose scale and dimensional ratio are appropriately changed or exaggerated from those of the actual objects for the sake of ease of illustration and understanding.

(Dimmer device)
FIG. 1 is a diagram showing a light control device (laminated glass) 10 according to the present embodiment. The light control device 10 according to the present embodiment has a three-dimensional shape with a curved surface, and in FIG. 1, as an example, the light control device 10 has a shape convex on one surface. have. Note that the light control device 10 is not limited to this. For example, the surface shape may be a planar shape (that is, a flat plate shape), or the surface shape may be a two-dimensional shape having a curved surface shape (for example, a part of a cylinder). It is also possible to use the following configurations: Here, a three-dimensional shape is not a simple cylindrical surface, but a curved surface that cannot be constructed simply by deforming a plane without expansion or contraction; it is a two-dimensional shape curved two-dimensionally around a single axis (two-dimensional It is distinguished from a two-dimensional shape (a two-dimensional curved surface) that is two-dimensionally bent at different curvatures around a plurality of mutually parallel axes (a two-dimensional curved surface). That is, a three-dimensional shape is a shape formed by a partially or entirely curved surface about each of a plurality of axes that are inclined with respect to each other. Moreover, in this specification, planar view refers to a state viewed from a direction perpendicular to the main surface of the light control device 10.

As shown in FIG. 1, the light control device 10 according to the present embodiment includes a first glass plate 11, a first intermediate film 13, a film 33, an antireflection layer 37, a light control cell 20, and a second light control cell 20. It includes an intermediate film 14 and a second glass plate 12. The first glass plate 11, the first intermediate film 13, the film 33, the antireflection layer 37, the light control cell 20, the second intermediate film 14, and the second glass plate 12 are laminated in this order. has been done. Further, a void layer G is provided between the light control cell 20 and the film 33. The antireflection layer 37 is provided at a position facing the void layer G.

FIG. 2 is a sectional view showing the layer structure of the light control device 10 according to the present embodiment, and FIG. 3 is an exploded perspective view showing the layer structure of the light control device 10 according to the present embodiment. Note that the light control device 10 of this embodiment has a three-dimensional surface shape, but in FIGS. 2 and 3, the surface shape of the light control device 10 is shown as a flat surface for ease of understanding. The diagram shows a case where the

As shown in FIG. 2, the light control device 10 includes a first glass plate 11, a second glass plate 12, and a light control cell 20 disposed between the first glass plate 11 and the second glass plate 12. It is equipped with The light control cell 20 includes a first laminate 21 including a first base material 24, a first transparent electrode 25, and a first alignment layer 26, a second base material 27, a second transparent electrode 28, and a second alignment layer 29. and a liquid crystal layer 23 disposed between the first laminate 21 and the second laminate 22. Further, a void layer G is provided between the light control cell 20 and the film 33. Further, an antireflection layer 37 is provided at a position facing the void layer G.

The first glass plate (first transparent substrate) 11 and the second glass plate (second transparent substrate) 12 are plate glasses arranged on the front and back surfaces of the light control device 10, respectively, and have high translucency. The first glass plate 11 and the second glass plate 12 have a three-dimensional surface shape with a curved surface shape, and are preformed in a shape having a curved surface shape convex on one side (see FIG. 1). ). In this case, the first glass plate 11 and the second glass plate 12 are formed so that the first glass plate 11 side is convex with respect to the second glass plate 12 side, but the present invention is not limited to this. The second glass plate 12 side may be formed in a convex shape with respect to the glass plate 11 side. Further, in the present embodiment, the first glass plate 11 and the second glass plate 12 have a thickness of 0.5 mm or more and 4 mm or less, and as an example, plate glass having a thickness of 2 mm is used for both. The first glass plate 11 and the second glass plate 12 may be made of inorganic glass or resin glass. As the resin glass, for example, polycarbonate, acrylic, etc. can be used. When inorganic glass is used as the first glass plate 11 and the second glass plate 12, the light control device 10 can have excellent heat resistance and scratch resistance. On the other hand, when resin glass is used as the first glass plate 11 and the second glass plate 12, the light control device 10 can be made lighter. Furthermore, the first glass plate 11 and the second glass plate 12 may be subjected to surface treatment such as hard coating, if necessary.

The first intermediate film 13 is a member that joins the first glass plate 11 and the light control cell 20 together. Similarly, the second intermediate film 14 is a member that joins the second glass plate 12 and the light control cell 20. In this embodiment, the first intermediate film 13 and the second intermediate film 14 each use a sheet made of PVB (polyvinyl butyral) resin. Note that the material for the first intermediate film 13 and the second intermediate film 14 is not limited to the above-mentioned PVB, but may also be made of EVA (ethylene-vinyl acetate copolymer), COP (cycloolefin polymer), or the like. Further, the thicknesses of the first intermediate film 13 and the second intermediate film 14 may be appropriately selected depending on the materials thereof. Specifically, the thickness of the first intermediate film 13 and the second intermediate film 14 may be 300 μm or more and 2.5 mm or less, and as an example, a thickness of 760 μm is used.

Further, as shown in FIGS. 2 and 3, the first intermediate film 13 and the second intermediate film 14 are connected to each other by a frame intermediate film (third intermediate film) 16. The frame interlayer film 16 is an interlayer film that has a frame shape or a square shape (a square shape with a hollow center) in plan view. The frame interlayer film 16 may be made of the same material as the first interlayer film 13 and the second interlayer film 14 . By providing the frame interlayer film 16, it is possible to prevent moisture and the like from entering from the side surfaces of the light control device 10, and to further improve the water-blocking properties of the light control device 10.

Specifically, when the first interlayer film 13 and the second interlayer film 14 are larger than the light control cell 20 (in plan view), the frame interlayer film 16 is formed in the thickness part of the light control cell 20 in a cross-sectional view. This is an intermediate film formed. This frame interlayer film 16 is formed so as to surround the periphery of the light control cell 20 in a plan view, and has a frame-shaped intermediate film formed by hollowing out the shape of the light control cell 20 from the shapes of the first interlayer film 13 and the second interlayer film 14. It is a membrane. In this case, a frame intermediate film 16 is formed between the first intermediate film 13 and the second intermediate film 14 and in a portion corresponding to the periphery of the light control cell 20. Further, a frame interlayer film 16 is also formed between the first interlayer film 13 and the second interlayer film 14 and at a portion corresponding to the periphery of the film 33 and the void layer G. Note that the width W1 (see FIG. 3) of the frame interlayer film 16 is preferably about 0 mm or more and 1/4 or less of the glass width.

The light control cell 20 (light control film, liquid crystal film) is a film that can control the amount of transmitted light by changing the applied voltage. The light control cell 20 is arranged so as to be sandwiched between the first glass plate 11 and the second glass plate 12. This light control cell 20 has a guest-host type liquid crystal layer using a dichroic dye, and is a member that changes the amount of transmitted light by an electric field applied to the liquid crystal. The light control cell 20 includes a first laminate 21 in the form of a film, a second laminate 22 in the form of a film, and a liquid crystal layer 23 disposed between the first laminate 21 and the second laminate 22. ing.

As shown in FIG. 2, the first laminate 21 is formed by stacking a first base material 24, a first transparent electrode 25, and a first alignment layer 26. That is, the first base material 24, the first transparent electrode 25, and the first alignment layer 26 are stacked in this order from the first intermediate film 13 side. Further, the second laminate 22 is formed by laminating a second base material 27, a second transparent electrode 28, and a second alignment layer 29. That is, the second base material 27, the second transparent electrode 28, and the second alignment layer 29 are stacked in this order from the second intermediate film 14 side.

Furthermore, a plurality of bead spacers 31 are arranged between the first laminate 21 and the second laminate 22. The liquid crystal layer 23 is disposed in a filling manner between the plurality of bead spacers 31 between the first laminate 21 and the second laminate 22 . The plurality of bead spacers 31 may be arranged irregularly or regularly.

The light control cell 20 is controlled by the guest host liquid crystal composition provided in the liquid crystal layer 23 by driving the first transparent electrode 25 and the second transparent electrode 28 provided in the first laminate 21 and the second laminate 22. It changes the orientation of the liquid crystal material, thereby changing the amount of transmitted light.

The first base material 24 and the second base material 27 may be made of transparent resin and may be a flexible film. As the first base material 24 and the second base material 27, it is possible to use a transparent resin film that has small optical anisotropy and has a transmittance of 80% or more in the visible wavelength range (380 nm or more and 800 nm or less). desirable. Examples of materials for the transparent resin film include acetyl cellulose resins such as triacetyl cellulose (TAC), polyester resins such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN), polyethylene (PE), and polypropylene (PP). , polyolefin resins such as polystyrene, polymethylpentene, and EVA, vinyl resins such as polyvinyl chloride and polyvinylidene chloride, acrylic resins, polyurethane resins, polysulfone (PEF), polyethersulfone (PES), polycarbonate ( Examples include resins such as PC), polysulfone, polyether (PE), polyether ketone (PEK), (meth)acronitrile, cycloolefin polymer (COP), and cycloolefin copolymer. As the material for the transparent resin film, resins such as polycarbonate, cycloolefin polymer, and polyethylene terephthalate are particularly preferred. Further, the thickness of the transparent resin film used as the first base material 24 and the second base material 27 depends on the material thereof, but can be appropriately selected within a range in which the transparent resin film has flexibility. The thickness of the first base material 24 and the second base material 27 may be 50 μm or more and 200 μm or less, respectively. In this embodiment, a polyethylene terephthalate film with a thickness of 100 μm is used as an example of the first base material 24 and the second base material 27.

The first transparent electrode 25 and the second transparent electrode 28 are composed of transparent conductive films laminated on the first base material 24 and the second base material 27 (transparent resin film), respectively. As the transparent conductive film, various transparent electrode materials applicable to this type of transparent resin film can be used, and examples include oxide-based transparent metal thin films with a total light transmittance of 50% or more. . Examples include tin oxide, indium oxide, and zinc oxide.

Examples of tin oxide (SnO ₂ )-based materials include NESA (tin oxide SnO ₂ ), ATO (antimony tin oxide), and fluorine-doped tin oxide. Examples of indium oxide (In ₂ O ₃ )-based materials include indium oxide, ITO (Indium Tin Oxide), and IZO (Indium Zinc Oxide). Examples of zinc oxide (ZnO)-based materials include zinc oxide, AZO (aluminum-doped zinc oxide), and gallium-doped zinc oxide. In this embodiment, the transparent conductive films forming the first transparent electrode 25 and the second transparent electrode 28 are made of ITO.

The bead spacer 31 is a member that defines the thickness (cell gap) of a portion of the liquid crystal layer 23 excluding the outer peripheral portion. In this embodiment, a spherical bead spacer is used as the bead spacer 31. The diameter of the bead spacer 31 may be in the range of 1 μm or more and 20 μm or less, preferably 3 μm or more and 15 μm or less. The bead spacer 31 can be made of an inorganic material such as silica, an organic material, or a core-shell structure combining these materials. In addition to the spherical configuration, the bead spacer may also be configured in a rod shape such as a columnar shape, an elliptical columnar shape, a polygonal columnar shape, or the like. Furthermore, although the bead spacer 31 is manufactured from a transparent member, the color may be adjusted by applying a colored material as necessary.

Note that in this embodiment, the bead spacer 31 is provided in the second laminate 22, but is not limited to this, and is provided in both the first laminate 21 and the second laminate 22, or in the first laminate 22. It may be provided only in the laminate 21. Moreover, the bead spacer 31 does not necessarily have to be provided. Alternatively, a columnar spacer may be used instead of the bead spacer 31 or together with the bead spacer 31.

The first alignment layer 26 and the second alignment layer 29 are members for aligning a group of liquid crystal molecules included in the liquid crystal layer 23 in a desired direction. The first alignment layer 26 and the second alignment layer 29 are formed by photoalignment layers. The photo-alignment material that can be applied to the photo-alignment layer can be a wide variety of materials to which photo-alignment methods can be applied; examples include photodecomposition type, photodimerization type, photoisomerization type, etc. can. In this embodiment, a photodimerizable material is used. Examples of photodimerizable materials include polymers containing cinnamate, coumarin, benzylidene phthalimidine, benzylidene acetophenone, diphenylacetylene, stilbazole, uracil, quinolinone, maleimide, or cinnamylidene acetic acid derivatives. Among these, polymers containing one or both of cinnamate and coumarin are preferably used because of their good alignment control ability.

Note that a rubbed alignment layer may be used instead of the photoalignment layer. Regarding the rubbed alignment layer, the rubbing treatment may not be performed, or the alignment layer may be prepared by performing the rubbing treatment and forming a fine line-like uneven shape. Note that in this embodiment, the light control cell 20 includes the first alignment layer 26 and the second alignment layer 29, but is not limited to this, and may not include the first alignment layer 26 and the second alignment layer 29. It may also be a form.

A wide variety of guest-host liquid crystal compositions and dichroic dye compositions can be applied to the liquid crystal layer 23. The guest-host liquid crystal composition may contain a chiral agent so that when the liquid crystal material is horizontally aligned, it is oriented in a helical shape in the thickness direction of the liquid crystal layer 23. Further, between the first laminate 21 and the second laminate 22, a sealing material 32 that is ring-shaped or frame-shaped in plan view is arranged so as to surround the liquid crystal layer 23. This sealing material 32 holds the first laminate 21 and the second laminate 22 together and prevents leakage of the liquid crystal material. The sealing material 32 can be made of thermosetting resin such as epoxy resin or acrylic resin, ultraviolet curable resin, or the like.

The light control cell 20 applies an alignment regulating force related to pretilt to the first alignment layer 26 and the second alignment layer 29 in a certain direction so that the alignment of the guest-host liquid crystal composition during light shielding is the same as when an electric field is applied. It is configured with a set vertical alignment layer, and is configured as normally clear. Note that this setting during light transmission may be configured as normally dark when an electric field is applied. Here, normally dark is a structure in which the transmittance is at its minimum when no voltage is applied to the liquid crystal, resulting in a black screen. Normally clear is a structure in which the transmittance is maximum and becomes transparent when no voltage is applied to the liquid crystal.

In addition, although the light control cell 20 of this Embodiment showed the example provided with the guest-host type liquid crystal layer 23, it is not limited to this. The light control cell 20 may have a structure including a liquid crystal layer 23 of a TN (Twisted Nematic) system, a VA (Vertical Alignment) system, an IPS (In-Plane-Switching) system, etc. that do not use a dichroic dye composition. When such a liquid crystal layer 23 is provided, linearly polarizing layers are further provided on the surfaces of the first base material 24 and the second base material 27, respectively, so that they can function as a light control film.

In this embodiment, a film 33 is disposed between the light control cell 20 and the first intermediate film 13. This film 33 is disposed between the first base material 24 of the light control cell 20 and the first intermediate film 13, and is bonded to the first intermediate film 13. The film 33 may be made of transparent resin and may be a flexible resin film. As the film 33, it is desirable to use a transparent resin film that has small optical anisotropy and has a transmittance of 80% or more in the visible wavelength range (380 nm or more and 800 nm or less). As the material of the transparent resin film, the same material as the transparent resin film used for the first base material 24 and the second base material 27 described above can be used. Alternatively, the film 33 may be a functional film such as an infrared (IR) reflective film or an ultraviolet (UV) cut film. Furthermore, the film 33 may be a light control cell, a reflective polarizing film, a light control film having a light control method other than liquid crystal, or a film having a defroster function. Further, the thickness of the film 33 may be, for example, 50 μm or more and 250 μm or less, and preferably 100 μm or more and 125 μm or less, although it depends on the material. The planar shape of the film 33 is smaller than the planar shapes of the first intermediate film 13 and the second intermediate film 14 . Further, the planar shape of the film 33 is preferably smaller than the planar shape of the entire light control cell 20 and larger than the planar shape of the liquid crystal layer 23 located inside the sealing material 32. As a result, the film 33 covers the entire liquid crystal layer 23, so that the occurrence of liquid crystal pooling, which is a phenomenon where a large amount of liquid crystal is locally present in a part of the liquid crystal layer 23, can be suppressed over the entire surface. The planar shape of the film 33 may be made smaller than the inside of the sealing material 32 (liquid crystal layer 23) of the light control cell 20, and a liquid crystal pool may be induced in an area where the film 33 does not exist. The portion (outer periphery) where the liquid crystal pool is guided in this way can be hidden when the light control device 10 is placed in a vehicle window or the like. Furthermore, a functional film such as an infrared (IR) reflective film or an ultraviolet (UV) cut film may be provided on the film 33. In this case, the functional film may be bonded to the film 33. Further, the functional film may be added between the first intermediate film 13 and the film 33.

Furthermore, a void layer G is provided between the light control cell 20 and the film 33. In this case, the void layer G is formed in the space between the antireflection layer 37 and the film 33. That is, the antireflection layer 37 and the film 33 are not bonded to each other and are arranged at a constant interval in the thickness direction. The void layer G is filled with air, but is not limited to this, and may be filled with a gas such as nitrogen or an inert gas. The thickness of this void layer G is, for example, greater than 0 μm and less than 10,000 μm, preferably greater than or equal to 0.1 μm and less than or equal to 100 μm. The planar shape of the void layer G may be substantially the same as the planar shape of the film 33. In this way, by forming the void layer G between the light control cell 20 and the film 33, cell gap defects in the light control cell 20 are reduced, as will be described later, and the gap layer G is locally formed in a part of the liquid crystal layer 23. Therefore, it is possible to suppress the occurrence of liquid crystal accumulation, which is a phenomenon caused by the presence of a large amount of liquid crystal. Furthermore, by providing the void layer G between the light control cell 20 and the film 33, the heat insulation of the light control device 10 is improved, and the heat retention of the vehicle or building in which the light control device 10 is arranged can be improved. can. Moreover, when the light control device 10 puts the light control cell 20 in a light-blocking state, it is visible from the first glass plate 11 side due to reflection at the interface between the light control cell 20 and the void layer G and the interface between the film 33 and the void layer G. It is observed as a mirror surface.

The antireflection layer 37 is provided on the light control cell 20 at a position facing the void layer G. As such an antireflection layer 37, for example, an AR (Anti Reflection) film, an LR (Low Reflection) film, an AG (Anti Glare) film, or a moth-eye film may be used.

An AR film is a film that suppresses regular reflection by utilizing interference of reflected light. The structure of the antireflection layer is a single layer structure consisting of a low refractive index layer, a two layer structure consisting of a low refractive index layer and a high refractive index layer arranged so that the low refractive index layer becomes the surface layer, or a low refractive index layer. Examples include a multilayer structure in which layer layers are alternately laminated so that the surface layers are layered. A high refractive index layer and a low refractive index layer are expressions based on the relative relationship of refractive index between adjacent layers. For example, if the refractive index is higher than that of the layer being compared, the higher side will be the high refractive index layer, and the lower side will be the high refractive index layer. The side becomes a low refractive index layer. Materials for forming the low refractive index layer include silicon oxide, magnesium fluoride, fluorine-containing resins, etc., and materials for forming the high refractive index layer include titanium oxide, zinc sulfide, zirconium oxide, niobium oxide, etc. .

The LR film is a film made of a low-reflection material with low reflectance. This allows the light reflected at each interface to cancel each other out using optical interference, thereby suppressing reflection.

The AG film is a film that reduces specular reflection by diffusing incident light. The surface of the AG film is provided with fine irregularities that diffusely reflect external light. AG film can be formed by coating a composition in which an inorganic filler such as silica is added to a binder resin on a transparent substrate, or by shaping the surface of the coated layer using a shaping plate. I can do it. As the binder resin, curable acrylic resin, ionizing radiation curable resin, etc. are preferably used.

A moth-eye film is a film that includes a concavo-convex structure in which a large number of microprotrusions are regularly arranged at intervals equal to or less than the shortest wavelength in the wavelength range of the light that is intended to prevent reflection, as a structure for reducing reflected light. Thereby, the refractive index for incident light is continuously changed in the thickness direction, and the discontinuous interface of the refractive index is eliminated, thereby making it possible to prevent light reflection.

The planar shape of the antireflection layer 37 is preferably smaller than the planar shapes of the first glass plate 11 and the second glass plate 12. Further, the planar shape of the antireflection layer 37 is preferably the same as or larger than the planar shape of the void layer G. As a result, the antireflection layer 37 covers the entire void layer G, so that interference unevenness (Newton's ring) caused by the presence of the void layer G can be suppressed over the entire surface. The thickness of the antireflection layer 37 may be 30 μm or more and 200 μm or less.

The antireflection layer 37 is attached to the surface of the light control cell 20 on the void layer G side (on the first base material 24) with an optically transparent adhesive film 38 interposed therebetween. As the optically transparent adhesive film 38, an optically transparent adhesive film called OCA (Optical Clear Adhesive Film), such as an acrylic adhesive, can be used. This optically transparent adhesive film 38 does not include a base material and can be composed only of an adhesive having a substantially constant film thickness. The optically transparent adhesive film 38 is manufactured by sandwiching an adhesive between separators (releasing materials) with excellent releasability.The laminate of the adhesive and separator is cut into a desired shape, and the separator is removed to apply optical transparency to the desired location. An adhesive film 38 can be attached. Further, as the adhesive for the optically transparent adhesive film 38, for example, an acrylic adhesive, a silicone adhesive, or a urethane adhesive may be used. The thickness of the optically transparent adhesive film 38 may be 50 μm or more and 300 μm or less. Note that the antireflection layer 37 may be formed by coating the light control cell 20 with a material for the antireflection layer 37 without using the optically transparent adhesive film 38.

As shown in FIG. 3, an extension portion 61 is formed by a portion of the light control cell 20 and a portion of the film 33. This extension portion 61 projects outward from the light control device 10 in the surface direction. Further, the extension portion 61 has a substantially rectangular shape in plan view, and extends outward from the first glass plate 11 and the second glass plate 12. In this case, the extension part 61 is formed by the first base material 24 of the light control cell 20 and the film 33. That is, the first base material 24 of the light control cell 20 has a protruding piece 24a that protrudes outward, and the film 33 has a protruding piece 33a that protrudes outward. The extension portion 61 is constituted by the protruding piece 24a of the light control cell 20 and the protruding piece 33a of the film 33. The protruding piece 24a of the first base material 24 and the protruding piece 33a of the film 33, which constitute the extension part 61, have the same shape.

In FIG. 3, a communication hole (ventilation hole) 62 is provided that communicates the void layer G between the light control cell 20 and the film 33 with the outside air. This communication hole 62 is formed inside the extension part 61, and specifically, is provided in the gap between the first base material 24 and the film 33 in the extension part 61. In this case, even if air escapes from the void layer G between the dimming cell 20 and the film 33 during laminated glass processing, which will be described later, air or a gas such as nitrogen is injected through the communication hole 62 to restore the void layer G. can do. Thereby, it is possible to suppress the formation of a liquid crystal pool in the liquid crystal layer 23 of the light control cell 20. After restoring the void layer G between the light control cell 20 and the film 33, the communication hole 62 may be sealed with an adhesive, a liquid intermediate film, or the like. Note that the extension part 61 is formed of the first base material 24 and the film 33, and the second base material 27 is not present at the location of the extension part 61. Thereby, the communication hole 62 can be made thin, the air passage becomes wide, and liquid crystal accumulation can be easily improved. However, the present invention is not limited thereto, and the extension portion 61 may be formed of the second base material 27, the first base material 24, and the film 33. Further, the extension portion 61 may be formed by the antireflection layer 37 and the film 33, or may be formed by the first base material 24, the antireflection layer 37, and the film 33. Although the location where the extension portion 61 is provided is not limited, it is preferably provided outside the vicinity of the corner of the light control cell 20 in order to suppress the occurrence of wrinkles and the like.

Further, the width W2 of the extension portion 61 is preferably 5 mm or more and 40 mm or less, and more preferably 10 mm or more and 20 mm or less. By setting it within the above range, the width W2 of the extension portion 61 can be kept narrow, and liquid crystal accumulation due to distortion of the communication hole 62 can be made less likely to occur. Note that the communication hole 62 may be any hole as long as it allows the void layer G between the light control cell 20 and the film 33 to communicate with the outside air. For example, the extension portion 61 may be formed over the entire first base material 24 (second base material 27) of the light control cell 20 and one side of the film 33.

As shown in FIG. 3, the light control device 10 is connected to a light control controller 91, and a sensor device 92 and a user operation unit 93 are connected to the light control controller 91. The dimming controller 91 can control the dimming state of the dimming device 10, switching between blocking and transmitting light by the dimming device 10, and changing the transmittance of light in the dimming device 10. Specifically, the dimming controller 91 is connected to the external electrode substrate 35 of the dimming device 10 and adjusts the electric field applied to the liquid crystal layer 23 of the dimming device 10 to align the liquid crystal molecules in the liquid crystal layer 23. By changing it, it is possible to switch between blocking and transmitting light by the light control device 10, and change the degree of light transmission.

The dimming controller 91 can adjust the electric field applied to the liquid crystal layer 23 based on any method. The light control controller 91 adjusts the electric field applied to the liquid crystal layer 23 according to, for example, the measurement result of the sensor device 92 or an instruction (command) input by the user via the user operation unit 93, and controls the light control by the light control device 10. It is possible to switch between blocking and transmitting light, and changing the degree of light transmission. Therefore, the dimming controller 91 may automatically adjust the electric field applied to the liquid crystal layer 23 according to the measurement result of the sensor device 92, or manually according to a user's instruction via the user operation unit 93. It may be adjusted to Note that the object to be measured by the sensor device 92 is not particularly limited. For example, the brightness of the usage environment may be measured. In this case, the light control device 10 may be used to switch between blocking and transmitting light or changing the transmittance of light. This is done depending on the brightness of the environment. Further, both the sensor device 92 and the user operation unit 93 do not necessarily need to be connected to the dimming controller 91, and only one of the sensor device 92 and the user operation unit 93 may be connected. .

The external electrode substrate 35 is sandwiched between the first laminate 21 and the second laminate 22. In the region where the external electrode substrate 35 is formed, the first laminate 21 and the second laminate 22 have electrode protrusions 36 that protrude outward in the surface direction. The external electrode substrate 35 is embedded inside the electrode protruding piece 36. The external electrode substrate 35 and the electrode protruding piece 36 are sandwiched between the frame intermediate film 16 and the second intermediate film 14, as shown by the arrows in FIG. protrude in one direction. However, the present invention is not limited to this, and the external electrode substrate 35 and the electrode protrusion piece 36 may be sandwiched between the frame intermediate film 16 and the first intermediate film 13.

(Manufacturing method of dimming cell)
Next, a method of manufacturing the light control cell 20 of the light control device 10 according to the present embodiment will be explained using FIGS. 4(a) to 4(d) and FIGS. 5(a) to (d). 4(a)-(d) and FIG. 5(a)-(d) are cross-sectional views showing a method of manufacturing the light control cell 20 according to this embodiment.

First, as shown in FIG. 4(a), a second base material 27 supplied in a roll is prepared. Subsequently, as shown in FIG. 4B, a second transparent electrode 28 made of, for example, ITO is formed on the second base material 27 by sputtering using a sputtering device or the like. At this time, the transparent electrode may be patterned to have a predetermined pattern shape.

Next, as shown in FIG. 4(c), a coating liquid for the second alignment layer 29 is applied onto the second base material 27 on which the second transparent electrode 28 is formed, and then exposed to light to form a second alignment layer. Create layer 29. In this way, the second laminate 22 in which the second base material 27, the second transparent electrode 28, and the second alignment layer 29 are laminated is prepared.

Note that a first laminate 21 in which a first base material 24, a first transparent electrode 25, and a first alignment layer 26 are stacked is also prepared in the same manner as the steps shown in FIGS. 4(a) to 4(c). do.

Subsequently, as shown in FIG. 4(d), bead spacers 31 are placed on the second alignment layer 29 of the second laminate 22. The bead spacers 31 can be arranged by a wide variety of methods in addition to wet/dry spreading. For example, by partially applying a coating liquid produced by dispersing bead spacers 31 together with a resin component in a solvent, and then sequentially performing drying and baking processes, beads can be randomly distributed on the second alignment layer 29. A spacer 31 may be placed to hold it so that it is difficult to move. Although not shown, the outer periphery of the bead spacer 31 may be covered with the second alignment layer 29. Specifically, by mixing the bead spacers 31 with the coating liquid for the second alignment layer 29 to form the second alignment layer 29, the bead spacers 31 are thinly covered and held by the second alignment layer 29. It can be made into a form that

Next, as shown in FIG. 5A, a sealing material 32 is applied onto the second alignment layer 29 of the second laminate 22 using a dispenser. This sealing material 32 is applied in a frame shape so as to surround the area where the liquid crystal layer 23 is to be formed.

Next, as shown in FIGS. 5(b) and 5(c), the second laminate 22 and the first laminate 21 are stacked on each other, and the liquid crystal layer 23 is disposed. During this time, first, as shown in FIG. 5(b), liquid crystal constituting the liquid crystal layer 23 is dropped in an area surrounded by the sealing material 32. At this time, the liquid crystal layer 23 is filled inside the sealing material 32 and around the bead spacers 31.

Subsequently, as shown in FIG. 5C, the second laminate 22 on which the liquid crystal layer 23 is arranged and the first laminate 21 prepared in advance are stacked and pressed together. Thereafter, the sealing material 32 is semi-cured by irradiation with ultraviolet rays, and then heated, thereby integrating the first laminate 21 and the second laminate 22. Thereafter, the thus produced laminate of the first laminate 21 and the second laminate 22 is cut into a desired size by trimming.

Note that, as described above, it is preferable to stack the second laminate 22 and the first laminate 21 on each other after disposing the liquid crystal layer 23, but the present invention is not limited to this. The liquid crystal layer 23 may be arranged after the body 21 is laminated on each other. Thereafter, by attaching an external electrode substrate 35 (see FIG. 3) between the first laminate 21 and the second laminate 22, the light control cell 20 according to the present embodiment is obtained.

Next, as shown in FIG. 5(d), by pasting the antireflection layer 37 on the first base material 24 of the light control cell 20 using an optically transparent adhesive film 38, a laminate for a light control device is formed. Get 70. In the present disclosure, such a laminate 70 for a light control device is also provided. Note that the antireflection layer 37 may be formed by coating the light control cell 20 with a material for the antireflection layer 37.

(Manufacturing method of light control device)
Next, a method for manufacturing the light control device 10 (laminated glass processing method) according to the present embodiment will be described using FIGS. 6(a) to 6(c). 6(a) to 6(c) are cross-sectional views showing a method of manufacturing the light control device 10. FIG.

First, as shown in FIG. 6(a), a first glass plate 11 and a second glass plate 12 are prepared. Subsequently, the first intermediate film 13, the frame intermediate film 16, the film 33, and the light control cell 20 in which the antireflection layer 37 are formed are formed by the first glass plate 11 and the second glass plate 12, and the second intermediate film 13 is formed. A laminated glass laminate 30 is produced by sandwiching the film 14 therebetween. Here, the first glass plate 11 and the second glass plate 12 are shaped in advance into a curved shape having a three-dimensional surface shape.

Next, as shown in FIG. 6(b), the laminated glass laminate 30 is enclosed in a bag 51. The bag 51 is preferably made of rubber or silicone, which have flexibility and airtightness. Further, a ventilation pipe 52 is connected to the bag 51, and air inside the bag 51 is sucked through the ventilation pipe 52 by a pump (not shown). Thereby, the air remaining between each member of the laminated glass laminate 30 can be sucked, and it is possible to suppress poor crimping caused by air bubbles remaining inside the light control device 10. In this embodiment, suction is applied so that the inside of the bag 51 and the inside of the laminated glass laminate 30 are in a vacuum state, and a pressure of approximately atmospheric pressure (0.1 MPa) is applied to the laminated glass laminate 30 due to the differential pressure. Let me explain with an example. However, the present invention is not limited to this. For example, by adjusting the suction force of a pump (not shown), even though the interior of the bag 51 is not completely vacuumed, the air between each member of the laminated glass laminate 30 is sufficiently sucked, and the laminated glass A pressure lower than atmospheric pressure may be applied to the stacked body 30 due to a pressure difference.

Subsequently, as shown in FIG. 6C, after the laminated glass laminate 30 is sealed in the bag 51, the bag 51 is placed in the heating/pressing device 53. Subsequently, the laminated glass laminate 30 together with the bag 51 is heated at a predetermined temperature and time. In this embodiment, the laminated glass laminate 30 is heated at a temperature equal to or higher than the softening temperature of the first intermediate film 13, second intermediate film 14, and frame intermediate film 16 for a predetermined period of time. At this time, it is preferable that the air inside the bag 51 is sucked through the ventilation pipe 52 by a pump (not shown). The device used as the heating/pressing device 53 is not particularly limited as long as it can sufficiently heat and press the laminated glass laminate 30, and examples thereof include devices for ovens and autoclaves. By this heating, the first intermediate film 13, the second intermediate film 14, and the frame intermediate film 16 are melted, and the first glass plate 11, the first intermediate film 13, the frame intermediate film 16, the film 33, The antireflection layer 37, the light control cell 20, the second intermediate film 14, and the second glass plate 12 are pressure-bonded and joined together to obtain the light control device 10. Note that at this time, since the film 33 and the antireflection layer 37 are not directly bonded to each other, a void layer G is formed between them. By providing such a void layer G, the pressure applied to the liquid crystal layer 23 of the light control cell 20 is released after manufacturing the light control device 10, so that the uneven distribution of the liquid crystal layer 23 in the light control cell 20 is prevented. Even if there is, this uneven distribution of the liquid crystal layer 23 is naturally eliminated.

Thereafter, the cell gap (liquid crystal layer A step (leveling step) may be performed to make the thickness of 23 uniform.

By the way, during laminated glass processing for manufacturing the light control device 10 in this manner, pressure is applied to each member of the laminated glass laminate 30. At this time, the original cell gap (thickness of the liquid crystal layer 23) is maintained in the part where the spacer (bead spacer 31) is located, but as it moves away from the bead spacer 31, the value of the cell gap becomes smaller than the original value. . If such a cell gap becomes uneven, there is a risk that the quality of the light control device 10 may be deteriorated, such as the appearance of the light control device 10 becoming defective or the light control function becoming uneven.

On the other hand, according to the present embodiment, the film 33 is arranged between the light control cell 20 and the first intermediate film 13, and the void layer G is provided between the light control cell 20 and the film 33. It is being As a result, even if a liquid crystal pool (a phenomenon in which a large amount of liquid crystal exists locally) occurs in the liquid crystal layer 23 of the light control cell 20, the pressure applied to the liquid crystal layer 23 is released after the light control device 10 is manufactured. At this time, the light control cell 20 and the antireflection layer 37 naturally move within the void layer G so that the cell gap (thickness of the liquid crystal layer 23) becomes uniform (see FIGS. 7(a) to 7(c)). Thereby, liquid crystal accumulation in the light control cell 20 is eliminated, the liquid crystal layer 23 of the light control cell 20 can be uniformly distributed within the plane, and the quality and appearance of the light control device 10 can be improved.

Further, according to this embodiment, the antireflection layer 37 is provided at a position facing the void layer G. Thereby, reflection occurring on the surface in contact with the void layer G can be suppressed, and interference unevenness (Newton's ring) can be suppressed from occurring in the light control device 10. That is, in this embodiment, the void layer G exists between the light control cell 20 and the film 33. Therefore, as shown in FIG. 8(a), if the antireflection layer 37 is not provided at a position facing the void layer G, the light incident on the light control device 10 will be divided between the film 33 and the void layer G. Since the light L1 reflected at the interface and the light L2 reflected at the interface between the void layer G and the light control cell 20 interfere, Newton rings may occur. On the other hand, in this embodiment, as shown in FIG. 8(b), by providing the antireflection layer 37 on the light control cell 20, the interference at the interface between the void layer G and the light control cell 20 is reduced. Since reflection of light is suppressed and interference between the light L1 and light L2 described above is suppressed, the occurrence of Newton's rings can be suppressed. As a result, the appearance of the light control device 10 can be improved.

Further, according to the present embodiment, since the void layer G is provided between the light control cell 20 and the film 33, the heat insulation properties of the light control device 10 are improved, and the light control device 10 is provided. Heat retention inside vehicles and buildings can be improved.

Further, according to the present embodiment, the frame intermediate film 16 is formed to surround the light control cell 20, and the frame intermediate film 16 connects the first intermediate film 13 and the second intermediate film 14. There is. Thereby, it is possible to prevent moisture and the like from entering from the side surface of the light control device 10, and to further improve the water-blocking properties of the light control device 10.

(Modified example)
Next, various modifications of the present disclosure will be described with reference to FIGS. 9 to 13. 9 to 13 are diagrams each showing a light control device according to a modification of the present disclosure. In FIGS. 9 to 13, the same parts as those in the form shown in FIGS. 1 to 8 are given the same reference numerals, and detailed description thereof will be omitted.

(First modification)
FIG. 9 shows a light control device 10A according to a first modification. In the light control device 10A shown in FIG. 9, a plurality of spacers 34 are provided in the gap layer G between the light control cell 20 and the film 33. As the spacer 34, a spherical bead spacer having the same configuration as the bead spacer 31 of the light control cell 20 described above may be used. The plurality of spacers 34 may be arranged regularly or irregularly in plan view. In this case, the diameter of the spacer 34 may be in a range of greater than 0 μm and less than 10000 μm, and from the viewpoint of visibility, is preferably in a range of 1 μm or more and 100 μm or less. Alternatively, a columnar spacer may be used as the spacer 34. By arranging the spacers 34 in the void layer G in this manner, the thickness of the void layer G can be ensured. This prevents the light control cell 20 and the film 33 from sticking together, and prevents rainbow-like unevenness and liquid crystal pooling from occurring in the liquid crystal layer 23. In addition, in the manufacturing process of the light control device 10A, the spacer 34 may be attached to the film 33 side or may be attached to the antireflection layer 37 side. In addition, when attaching the spacer 34 to the film 33 side, the process of laminating|stacking the 1st laminated body 21 and the 2nd laminated body 22 and producing 10 A of light control devices can be facilitated. Further, instead of or together with the spacer 34, the surface of the film 33 may be roughened to prevent the light control cell 20 and the film 33 from sticking together. Note that also in the examples shown in FIGS. 10 to 13, which will be described later, the spacer 34 may be arranged within the void layer G.

(Second modification)
FIG. 10 shows a light control device 10B according to a second modification. In the light control device 10B shown in FIG. 10, the antireflection layer 37 is provided on the film 33 at a position facing the void layer G. The void layer G is formed between the light control cell 20 and the antireflection layer 37. In this case, the antireflection layer 37 is attached to the inner surface of the film 33 (the void layer G side) using an optically transparent adhesive film 38. By providing the antireflection layer 37 on the film 33 in this manner, reflection of light at the interface between the void layer G and the film 33 can be suppressed. This suppresses the interference between the light at the interface between the void layer G and the film 33 and the light reflected at the interface between the void layer G and the light control cell 20, thereby suppressing the occurrence of Newton rings. . Note that the antireflection layer 37 may be formed by coating the film 33 with a material for the antireflection layer 37 without using the optically transparent adhesive film 38. Moreover, in FIG. 10, the film 33 and the antireflection layer 37 disposed on the film 33 constitute a laminate 70A for a light control device. In the present disclosure, such a laminate 70A for a light control device is also provided.

(Third modification)
FIG. 11 shows a light control device 10C according to a third modification. In the light control device 10C shown in FIG. 11, two antireflection layers 37A and 37B are provided at positions facing the void layer G. One of these antireflection layers 37A is provided on the light control cell 20, and the other antireflection layer 37B is provided on the film 33. The void layer G is formed between one antireflection layer 37A and the other antireflection layer 37B. In this case, the two antireflection layers 37A and 37B are formed using the optically transparent adhesive film 38 on the inner surface side of the light control cell 20 (the void layer G side) and the inner surface side of the film 33 (the void layer G side), respectively. It is pasted. By providing the antireflection layers 37A and 37B on the light control cell 20 and the film 33, respectively, in this way, light reflection at the interface between the void layer G and the light control cell 20 and between the void layer G and the film 33 are prevented. It is possible to suppress both the reflection of light at the interface with the This suppresses interference between the light at the interface between the void layer G and the film 33 and the light reflected at the interface between the void layer G and the light control cell 20, thereby suppressing the occurrence of Newton rings. . Note that the antireflection layers 37A and 37B may be formed by coating the materials for the antireflection layers 37A and 37B on the light control cell 20 and the film 33, respectively, without using the optically transparent adhesive film 38. . As the antireflection layers 37A and 37B, those having the same structure as the antireflection layer 37 described above can be used. Furthermore, the antireflection layer 37A on one side and the antireflection layer 37B on the other side may have the same configuration or may have different configurations from each other.

(Fourth modification)
FIG. 12 shows a light control device 10D according to a fourth modification. In the light control device 10D shown in FIG. 12, the antireflection layer 37C is provided in the light control cell 20A at a position facing the void layer G. The void layer G is formed between the film 33 and the antireflection layer 37C. Specifically, as shown in FIG. 12, the light control cell 20A has a first base material, which is an antireflection layer 37C, at a position facing the void layer G. In this case, the light control cell 20A includes a first base material which is the anti-reflection layer 37C, a first transparent electrode 25, a second transparent electrode 28, a second base material 27, a first transparent electrode 25 and a second base material. It includes a liquid crystal layer 23 disposed between a transparent electrode 28 and a liquid crystal layer 23 . In the present disclosure, such a dimming cell 20A is also provided. In this manner, by providing the antireflection layer 37C at a position facing the void layer G in the light control cell 20A, reflection of light at the interface between the void layer G and the light control cell 20A can be suppressed. This suppresses interference between the light at the interface between the void layer G and the film 33 and the light reflected at the interface between the void layer G and the light control cell 20A, thereby suppressing the occurrence of Newton rings. . As the antireflection layer 37C, a layer having the same structure as the antireflection layer 37 described above can be used. Note that in the light control device 10D, an additional antireflection layer may be further provided on the film 33.

(Fifth modification)
FIG. 13 shows a light control device 10E according to a fifth modification. In the light control device 10E shown in FIG. 13, an antireflection layer 37D is provided in place of the film 33. That is, the light control device 10E includes a first glass plate 11, a first intermediate film 13, a light control cell 20, a second intermediate film 14, and a second glass plate 12. Further, an antireflection layer 37D is arranged between the light control cell 20 and the first intermediate film 13 instead of the film 33. Further, a void layer G is provided between the light control cell 20 and the antireflection layer 37D, and the antireflection layer 37D is provided at a position facing the void layer G. In this way, by providing the antireflection layer 37D between the light control cell 20 and the first intermediate film 13 at a position facing the void layer G, the difference between the void layer G and the first intermediate film 13 is reduced. Light reflection at the interface can be suppressed. This suppresses interference between the light at the interface between the void layer G and the first intermediate film 13 and the light reflected at the interface between the void layer G and the light control cell 20, thereby suppressing the occurrence of Newton rings. be able to. Furthermore, by using the antireflection layer 37D instead of the film 33, the overall thickness of the light control device 10E can be reduced. As the antireflection layer 37D, a layer having the same structure as the antireflection layer 37 described above can be used. Note that in the light control device 10E, an additional antireflection layer may be further provided on the light control cell 20.

It is also possible to combine the plurality of components disclosed in each of the above embodiments and modifications as appropriate. Alternatively, some components may be deleted from all the components shown in the above embodiments and modifications.

10, 10A to 10E Light control device 11 First glass plate 12 Second glass plate 13 First intermediate film 14 Second intermediate film 16 Picture frame intermediate film (third intermediate film)
20 Light control cell 21 First laminate 22 Second laminate 23 Liquid crystal layer 24 First base material 25 First transparent electrode 26 First alignment layer 27 Second base material 28 Second transparent electrode 29 Second alignment layer 31 Bead spacer 32 Seal material 33 Film 35 External electrode substrate 36 Protruding piece for electrode 37 Antireflection layer 38 Optical transparent adhesive film

Claims (3)

A control device comprising: a first base material, a first transparent electrode, a second transparent electrode, a second base material, and a liquid crystal layer disposed between the first transparent electrode and the second transparent electrode. a light cell,
A laminate for a light control device, comprising: an antireflection layer disposed on the first base material of the light control cell. film and
A laminate for a light control device, comprising: an antireflection layer disposed on the film. a first base material;
a first transparent electrode;
a second transparent electrode;
a second base material;
a liquid crystal layer disposed between the first transparent electrode and the second transparent electrode,
The first base material is a light control cell that is an antireflection layer.

Images