Lighting control device and lighting control module

Abstract

To provide a lighting control device and a lighting control module in which an encapsulation layer can be highly stably provided on a lighting control sheet.SOLUTION: A lighting control device attached to a translucent member comprises: a lighting control sheet including a lighting control layer, a first outer support layer positioned outside one surface of the lighting control layer, and a second outer support layer positioned outside the other surface of the lighting control layer; a lateral protrusion surface in the lighting control sheet, in which the first outer support layer protrudes laterally beyond an end face of the lighting control layer and an end face of the second outer support layer; a protruding burr surface in the lighting control sheet, in which the second outer support layer protrudes in an opposite side from the lighting control layer so as to continue from the end face of the second outer support layer; and an encapsulation layer encapsulating, of the lighting control sheet, the lateral protrusion surface of the first outer support layer, the end face of the lighting control layer, and the end face of the second outer support layer, and encapsulating a surface of the second outer support layer opposing the lighting control layer so as to cross over the protruding burr surface.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a dimming device and a dimming module. [Background technology]

[0002] Patent Documents 1 and 2 describe a sealed light control element with a surface protective film, which includes a light control element, a surface protective film, and a sealing layer. The light control element includes a first transparent conductive film, a second transparent conductive film arranged to face the first transparent conductive film, and a polymer dispersed liquid crystal layer arranged between the first transparent conductive film and the second transparent conductive film. The surface protective film includes a substrate and a pressure-sensitive adhesive layer arranged on one side thereof, and is laminated on at least one main surface of the light control element via the pressure-sensitive adhesive layer. The sealing layer is provided on the end surfaces of the light control element and the surface protective film. Patent Documents 1 and 2 specify that the thickness of the sealing layer, the thickness of the substrate of the surface protective film, and the thickness of the light control element satisfy predetermined conditions.

[0003] Patent Documents 3 and 4 describe light-controlling sheets comprising a first electrode sheet, a second electrode sheet, a light-controlling layer, and an adhesive layer. The first electrode sheet comprises a first transparent substrate and a first transparent electrode layer, and the first transparent substrate has a first surface in contact with the first transparent electrode layer and a second surface opposite the first surface. The second electrode sheet comprises a second transparent substrate and a second transparent electrode layer. The light-controlling layer is located between the first transparent electrode layer and the second transparent electrode layer. The adhesive layer is adhered to the second surface of the first transparent substrate. In addition, in a plan view from a viewpoint facing the light-controlling sheet, a substrate surface that is part of the second surface of the first transparent substrate is exposed from the adhesive layer. In addition, the second transparent electrode layer has a first surface that is in contact with the light-controlling layer, and an electrode surface that is part of the first surface of the second transparent electrode layer is exposed from the first transparent substrate and also from the light-controlling layer. Furthermore, a sealing portion is provided at the edge of the light-controlling sheet so as to cover the electrode surface, the end face of the light-controlling layer, the substrate surface, and the end face of the adherend layer. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-056505 [Patent Document 2] International Publication No. 2021 / 065731 [Patent Document 3] Japanese Patent Application Laid-Open No. 2023-162670 [Patent Document 4] International Publication No. 2023 / 210460 Summary of the Invention [Problem to be solved by the invention]

[0005] However, according to the inventors' intensive research, there is room for improvement in the sealed light control elements with surface protective films of Patent Documents 1 and 2 from the viewpoint of providing a highly stable sealing layer on the edge surfaces of the light control element and the surface protective film. Similarly, there is room for improvement in the light control sheets of Patent Documents 3 and 4 from the viewpoint of providing a highly stable sealing portion on the edge of the light control sheet.

[0006] The present invention was completed based on the above-mentioned awareness of the problems, and aims to provide a light control device and a light control module that can provide a highly stable sealing layer on a light control sheet. [Means for solving the problem]

[0007] The dimming device of this embodiment is a dimming device attached to a light-transmitting member, and is characterized by having a dimming sheet having a dimming layer, a first outer support layer located outside one side of the dimming layer, and a second outer support layer located outside the other side of the dimming layer; in the dimming sheet, the first outer support layer has a laterally protruding surface that protrudes laterally beyond the end face of the dimming layer and the end face of the second outer support layer; in the dimming sheet, the second outer support layer has a protruding burr surface that protrudes to the side opposite the dimming layer so as to be continuous with the end face of the second outer support layer; and in the dimming sheet, a sealing layer that seals the laterally protruding surface of the first outer support layer, the end face of the dimming layer, and the end face of the second outer support layer, and seals the surface of the second outer support layer opposite the dimming layer so as to straddle the protruding burr surface.

[0008] The dimming device of this embodiment is a dimming device attached to a light-transmitting member, and is characterized in that it comprises a dimming sheet having a dimming layer, a first outer support layer located outside one side of the dimming layer, and a second outer support layer located outside the other side of the dimming layer; in the dimming sheet, the first outer support layer has a laterally protruding surface that protrudes laterally beyond the end face of the dimming layer and the end face of the second outer support layer; and in the dimming sheet, a sealing layer that seals the laterally protruding surface of the first outer support layer, the end face of the dimming layer, the end face of the second outer support layer, and the surface of the second outer support layer opposite the dimming layer, wherein when the length of the laterally protruding surface of the first outer support layer is c (mm) and the total length of the end face of the dimming layer and the end face of the second outer support layer is d (mm), c≧3d is satisfied. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a light control device and a light control module in which a sealing layer can be provided on a light control sheet with high stability. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a cross-sectional view showing the basic structure of a light controlling sheet. [Figure 2]1 is a cross-sectional view showing a configuration of a light control device according to a first embodiment. [Figure 3] 4 is an optical microscope photograph showing a state in which the peripheral edge of the light controlling sheet is sealed with a sealing layer in the light controlling device of the first embodiment. [Figure 4] FIG. 10 is a cross-sectional view showing the configuration of a light control device according to a second embodiment. [Figure 5] FIG. 10 is a cross-sectional view showing the configuration of a light control device according to a third embodiment. [Figure 6] 10 is an optical microscope photograph showing a state in which the peripheral edge of the light controlling sheet is sealed with a sealing layer in the light controlling device of the third embodiment. [Figure 7] FIG. 10 is a cross-sectional view showing the configuration of a light control device according to a fourth embodiment. [Figure 8] FIG. 10 is a diagram showing a state in which a glass lamination process is carried out on the light control device of the fourth embodiment. [Figure 9] FIG. 10 is a cross-sectional view showing the configuration of a light control device according to a fifth embodiment. [Figure 10] FIG. 10 is a cross-sectional view showing the configuration of a light control device according to a sixth embodiment. [Figure 11] 10A to 10C are diagrams showing experimental results for demonstrating the superiority of the dimming device and dimming module of the present embodiment. [Figure 12] FIG. 1 is a diagram showing an example of a technical problem that occurs when a sealing layer is provided to a conventional light-control sheet. DETAILED DESCRIPTION OF THE INVENTION

[0011] <Definitions of terms, etc.> In this specification, "first (of XX)" and "second (of XX)" may be read interchangeably. For example, in this specification, "first outer support layer (of the light-controlling sheet)" and "second outer support layer (of the light-controlling sheet)" may be read interchangeably, and "first surface (of the protruding burr surface)" and "second surface (of the protruding burr surface)" may be read interchangeably.

[0012] In this specification, the term "light-transmitting member" may be read as a "light-transmitting plate" or a "light-transmitting window," and is used to refer to a concept including a "glass member," a "glass plate," or a "glass window." That is, in this specification, a "glass member (glass plate, glass window)" is used as an example of a "light-transmitting member (light-transmitting plate, light-transmitting window)," but the "light-transmitting member (light-transmitting plate, light-transmitting window)" may be made of materials other than glass, including various plastics and other materials. For example, the "light-transmitting member (light-transmitting plate, light-transmitting window)" may be made of polycarbonate.

[0013] In this specification, a "dimming module" refers to a light-transmitting member and a dimming device attached to the light-transmitting member. As its name suggests, a light-transmitting member has its own inherent translucency. A dimming device ensures the translucency of the light-transmitting member and thus the dimming module (making them transparent) by not performing its dimming function, while it inhibits the translucency of the light-transmitting member and thus the dimming module (making them opaque) by performing its dimming function. Dimming devices are available in normal types (normal mode), which are transparent when energized and opaque when deenergized, and reverse types (reverse mode), which are transparent when deenergized and opaque when energized. "Dimmer functioning" refers to the normal type being deenergized and the reverse type being energized, while "dimming function not performing" refers to the normal type being energized and the reverse type being deenergized. In this way, a dimming device can be switched between a transparent state and an opaque state by switching between an energized state and a deenergized state. Here, the transparent state does not mean a visible light transmittance of 100% (does not mean a strict transparent state), and the opaque state does not mean a visible light transmittance of 0% (does not mean a strict opaque state), but each is used to mean a semi-transparent state. Furthermore, in this specification, the "dimming device" may mean a component of a dimming module, and may mean a dimming device in a state before being attached to a translucent member.

[0014] In this specification, the dimming method using the dimming module (dimming device) can be, for example, a polymer dispersed liquid crystal (PDLC) method or a polymer network liquid crystal (PNLC) method. Alternatively, the dimming method using the dimming module (dimming device) can be one that uses EC (Electrochromic), LC (Liquid Crystal), or SPD (Suspended Particle Device). In other words, the dimming method using the dimming module (dimming device) has a degree of freedom, and various design changes are possible.

[0015] In this specification, the light control device may have a "light control region (light control part, light control surface) that switches between a transparent state and an opaque state by switching between an energized state and an unenergized state" and a "sealing region (sealing part, sealing surface) that seals at least a portion of the periphery of the light control region." The light control region may refer to, for example, substantially the entire area excluding the periphery of a light control sheet (light control film) that has a light control layer, a pair of transparent conductive layers located on both sides of the light control layer, and a pair of transparent substrate layers located on both sides of the pair of transparent conductive layers. Furthermore, the light control region may be defined as the region where the light control function of the light control sheet (light control film) is exerted and the visible light transmittance changes, and / or the region of the light control sheet (light control film) where the light control layer is present when viewed in plan.

[0016] The sealed region may be configured to include, for example, a sealing member (e.g., a material that can be UV-cured in a short time) that seals at least a portion of the periphery of the light-controlling sheet (it may be a component separate from the light-controlling sheet). Alternatively, the sealed region may be configured to include a sealing functional layer provided at a position corresponding to at least a portion of the periphery of the light-controlling sheet (it may be a component of the light-controlling sheet).

[0017] In this specification, the light-transmitting member to which the light control device is attached may include a so-called one-piece or two-piece light-transmitting member. In the case of a one-piece light-transmitting member, the light control device may be attached to the surface of the one-piece light-transmitting member. In the case of a two-piece light-transmitting member, the light control device may be supported by being sandwiched between the two light-transmitting members through an intermediate layer (intermediate film), or the light control device may be attached to the surface of one of the two light-transmitting members. In this way, there is a degree of freedom in the structure for attaching the light control device to the light-transmitting member, and various design modifications are possible.

[0018] In this specification, the terms "upper surface" and "lower surface" as well as "one surface" and "other surface" may be defined as, for example, the upper surface (other surface) and the lower surface (one surface) in a drawing (these may be defined based on the vertical direction in the drawing). Furthermore, in this specification, the terms "outside" and "outer supporting layer" may be defined as the outside of a certain reference (center) layer, or as a layer supported on the outside of a certain reference (center) layer, regardless of the vertical direction in the drawing. For example, consider a laminated structure in which a certain reference (center) layer A is provided, layer B is provided on both sides of layer A, and layer C is provided on both sides of layer B. In this case, layer B is an "outer supporting layer" supported on the "outside" of layer A, and layer C is an "outer supporting layer" supported on the "outside" of layers A and B. In this sense, "outside" and "outside support layer" may be read as "upper layer" and "upper support layer," in which case the further away from a certain reference (center) layer is defined as the upper layer side, and the closer to a certain reference (center) layer is defined as the lower layer side.

[0019] <Conventional technical issues> Recently, from the perspectives of adjusting ambient light and protecting privacy, dimming devices that can be controlled to be transparent or opaque by applying a voltage have come to be used in partitions, residential windows, cars, etc. For example, dimming devices used in building materials often change between opaque and transparent states (the opaque state is white) in order to adjust transparency or opacity by controlling the scattering of transmitted light with voltage. However, in recent years, there has been a demand for devices that can be controlled to be black or transparent (or semi-transparent) (the opaque state is black) in consideration of environmental issues, solar radiation control (light blocking properties), and design aspects.

[0020] In consideration of reliability and other aspects, light-controlling devices generally have a structure in which the periphery is protected with an encapsulant. This is because if the periphery of the light-controlling device is not encapsulated, the light-controlling layer will be exposed and will deteriorate (and the light-controlling function will no longer be exhibited) due to moisture in the air. The encapsulant can be made of, for example, photocurable resin, thermosetting resin, sealing tape, etc.

[0021] However, according to the inventor's intensive research, the prior art, including the above-mentioned Patent Documents 1-4, has room for improvement in terms of providing a highly stable sealing layer on a light-controlling sheet. More specifically, recently, functional films (e.g., UV-cutting layer, IR-cutting layer, colored layer) have often been attached to the surface of light-controlling sheets, and the total thickness of light-controlling sheets has tended to increase. However, it has been difficult to stably provide a sealing layer on such thick light-controlling sheets. Furthermore, when an intermediate layer (interlayer film) is interposed between two light-transmitting members to sandwich and support the light-controlling sheet (during laminated glass processing), there is a risk that the sealing layer will peel off from the light-controlling sheet.

[0022] 12A and 12B are diagrams showing an example of a technical problem that occurs when a sealing layer is provided to a conventional light controlling sheet.

[0023] As shown in FIG. 12A, the light-controlling sheet includes a light-controlling layer, an upper substrate provided on the upper surface of the light-controlling layer, and a lower substrate provided on the lower surface of the light-controlling layer. The lower substrate has a laterally protruding surface that protrudes laterally (to the right in the figure) from the right end surface of the light-controlling layer and the right end surface of the upper substrate. The sealing layer covers the laterally protruding surface of the lower substrate, the right end surface of the light-controlling layer, the right end surface of the upper substrate, and a portion of the right side of the upper surface of the upper substrate. However, when the sealing material that forms the sealing layer is applied to the peripheral portion of the light-controlling sheet, there is a risk that the sealing material will leak toward the half-cut side (in the direction indicated by the arrow in the figure).

[0024] Figure 12B shows the case where an interlayer film is interposed between a pair of upper and lower glass panes, and the light-control sheet shown in Figure 12A is sandwiched and supported (during laminated glass processing). During the laminated glass process shown in Figure 12B, a force acts on the sealing layer in a direction away from the light-control sheet (arrow on the left side of Figure 12B), which may cause the sealing layer to peel off from the light-control sheet (right side of Figure 12B).

[0025] One of the reasons for the above technical issues is believed to be that the amount of sealing material applied to the light-controlling sheet is too large relative to the width of the sealing material to be applied.Furthermore, the above technical issues are believed to be due to the mechanism in which the sealing layer peels off due to the spreading force of the interlayer film during the laminating glass process (decompression, heating), because the area in contact with the sealing layer and the substrate (upper substrate, lower substrate) is small and the adhesive strength between the sealing layer and the substrate (upper substrate, lower substrate) is weak.

[0026] <Technical Concept of the Invention> The inventors considered the above-mentioned problems to be an important technical challenge and came up with the idea of ​​a structure for providing a highly stable sealing layer on a light-controlling sheet. This embodiment relates to a light-controlling device attached to a light-transmitting member and a light-controlling module in which a light-controlling device is attached to a light-transmitting member. The light-controlling sheet includes a light-controlling layer, a first outer support layer located on the outer side of one surface (e.g., the lower surface) of the light-controlling layer, and a second outer support layer located on the outer side of the other surface (e.g., the upper surface) of the light-controlling layer. In the light-controlling sheet, the first outer support layer has a lateral protruding surface that protrudes laterally beyond the end surface of the light-controlling layer and the end surface of the second outer support layer. In the light-controlling sheet, the second outer support layer has a protruding burr surface that protrudes to the side opposite the light-controlling layer so as to be continuous from the end surface of the second outer support layer. A sealing layer is provided to seal at least a portion of the peripheral edge of the light-controlling sheet. This sealing layer seals the lateral protruding surface of the first outer support layer, the end surface of the light-adjusting layer, and the end surface of the second outer support layer of the light-adjusting sheet, and also seals the surface of the second outer support layer opposite the light-adjusting layer (e.g., the top surface) so as to straddle (go over) the protruding burr surface.

[0027] The second outer support layer is provided with a protruding burr surface that protrudes from the end face of the second outer support layer on the side opposite the light-controlling layer so as to be continuous with the end face of the second outer support layer, and the sealing layer seals the side of the second outer support layer opposite the light-controlling layer so as to straddle (go over) the protruding burr surface, so that the sealing layer and the protruding burr surface engage (act as a hook), allowing the sealing layer to be provided with a high level of stability on the light-controlling sheet (preventing the sealing layer from slipping or coming off the light-controlling sheet). In this sense, the protruding burr surface may be read as a protruding surface, a protruding engaging surface, a protruding hook surface, etc.

[0028] Generally, during the manufacture of a light-controlling sheet, some unintentional burrs may occur on the peripheral edge of the light-controlling sheet. Such unintentional burrs are often removed by cutting or polishing, as they may adversely affect the function and appearance of the light-controlling sheet. In contrast, the protruding burr surface of this embodiment is distinct from the unintentional burrs described above, and is intentionally formed in an optimal shape to obtain interaction with the sealing layer (for example, the hook action resulting from the engagement between the two). The protruding burr surface of this embodiment is designed so as not to adversely affect the function and appearance of the light-controlling sheet.

[0029] As an example of an optimally set shape for the protruding burr surface, when the protruding height of the protruding burr surface from the surface of the second outer support layer opposite the light-controlling layer is a (μm), it is preferable to satisfy 50≦a≦100. By satisfying this condition, the engagement (hook action) between the sealing layer and the protruding burr surface can be further strengthened, allowing the sealing layer to be provided on the light-controlling sheet with high stability (preventing the sealing layer from slipping or coming off the light-controlling sheet). Even if this condition is not satisfied, a certain degree of effect can be achieved in providing a stable sealing layer on the light-controlling sheet.

[0030] As an example of an optimally configured shape for the protruding burr surface, it is preferable that the protruding burr surface has a first surface located on an extension of the end surface of the second outer support layer, and a second surface extending at an acute angle from the tip of the first surface to the surface of the second outer support layer opposite the light-controlling layer. By configuring the protruding burr surface in this manner, the engagement (hook action) between the sealing layer and the protruding burr surface can be further strengthened, allowing the sealing layer to be provided on the light-controlling sheet with high stability (preventing the sealing layer from slipping or coming off the light-controlling sheet). Even if the protruding burr surface is not configured in this manner, a certain degree of effectiveness can be achieved in providing a sealing layer with high stability on the light-controlling sheet.

[0031] The end face of the second outer support layer may have a tapered surface that approaches the protruding burr surface as it goes from the surface on the dimming layer side to the surface opposite the dimming layer. In this case, when the angle of the tapered surface of the second outer support layer is b (°), it is preferable to satisfy 90 < b ≤ 120.

[0032] The sealing layer may have a tapered surface that protrudes from the end face of the first outer support layer toward the protruding burr surface at a portion where it seals the side protruding surface of the first outer support layer, the end face of the dimming layer, and the tapered surface of the second outer support layer. In this case, the angle of the tapered surface of the second outer support layer and the angle of the tapered surface of the sealing layer may be different from each other.

[0033] By providing a tapered surface on the second outer support layer, providing a tapered surface on the sealing layer, and setting the angle of the tapered surface of the second outer support layer and the angle of the tapered surface of the sealing layer as described above, the effect of providing a sealing layer with high stability on the dimming sheet can be increased.

[0034] The sealing layer may have a curved surface portion that integrally seals the side protruding surface of the first outer support layer, the end face of the dimming layer, the end face of the second outer support layer, the protruding burr surface, and the surface of the second outer support layer opposite the dimming layer. Even when the sealing layer is composed of a curved surface portion, due to the engaging action (hook action) between the sealing layer and the protruding burr surface, a sealing layer with high stability can be provided on the dimming sheet.

[0035] For the dimming sheet of this embodiment, when the length of the side protruding surface of the first outer support layer is c (mm) and the total length of the end face of the dimming layer and the end face of the second outer support layer is d (mm), it is preferable to satisfy c ≥ 3d. By satisfying this condition, combined with the engaging action (hook action) between the sealing layer and the protruding burr surface (due to the synergistic effect), a sealing layer with high stability can be provided on the dimming sheet (preventing the sealing layer from shifting or coming off the dimming sheet).

[0036] More specifically, when applying the sealing material from the peripheral portion of the dimming sheet (for example, the upper side of the second outer support layer), since the length (width) c of the side protruding surface of the first outer support layer is sufficiently ensured, it is possible to prevent the sealing material from leaking to the half-cut side (for example, the end face side of the first outer support layer). Further, since the area where the sealing layer contacts the first and second outer support layers (for example, the upper and lower base materials) increases, it is possible to prevent the peeling of the sealing layer due to the spreading of the intermediate film in the laminated glass process.

[0037] Note that when paying attention to the peripheral portion of the dimming sheet, there may be two or more stepped portions (half-cut portions) from the central portion toward the peripheral portion. In such a case, for c and d for defining c≥3d described above, d can be defined as the height of the stepped portion including the end face of the dimming layer on the outermost peripheral side, and c can be defined as the width of the protruding surface continuing from the lower end of this stepped portion.

[0038] Here, the three conditions described above, 50≤a≤100, 90<b≤120, and c≥3d, may satisfy 60≤a≤90, 95≤b≤110, and c≥4d as a more preferable range. Thereby, the effect of providing a sealing layer with high stability on the dimming sheet can be increased.

[0039] Furthermore, if c≥3d described above is satisfied, even in a mode where the second outer support layer does not have a protruding burr surface, a sealing layer can be provided on the dimming sheet with high stability (it is possible to prevent the sealing layer from shifting or detaching from the dimming sheet). Of course, if c≥3d described above is satisfied and a protruding burr surface is provided on the second outer support layer and the sealing layer is provided so as to straddle (cross over) the protruding burr surface, the effect of providing a sealing layer with high stability on the dimming sheet can be more significantly exhibited.

[0040] <Basic configuration of the dimming sheet> FIG. 1 is a cross-sectional view showing the basic configuration of a dimming sheet (dimming film) 10.

[0041] The light-controlling sheet 10 has a light-controlling layer (liquid crystal layer) 20. The light-controlling layer 20 contains a liquid crystal composition. The light-controlling layer 20 is composed of, for example, polymer network liquid crystal (PNLC), polymer dispersed liquid crystal (PDLC), or nematic curvilinear aligned phase (NCAP). For example, polymer network liquid crystal has a three-dimensional mesh-like polymer network and holds liquid crystal molecules in the voids of the polymer network. The liquid crystal molecules contained in the light-controlling layer 20 have, for example, positive dielectric anisotropy, and the dielectric constant in the long axis direction of the liquid crystal molecules is larger than the dielectric constant in the short axis direction of the liquid crystal molecules. The liquid crystal molecules are, for example, Schiff base-based, azo-based, azoxy-based, biphenyl-based, terphenyl-based, benzoate-based, tolan-based, pyrimidine-based, cyclohexanecarboxylic acid ester-based, phenylcyclohexane-based, or dioxane-based liquid crystal molecules.

[0042] A transparent conductive layer 30 is provided on the outside of one surface (the bottom surface in the figure) of the light-controlling layer 20, and a transparent substrate layer 40 is provided on the outside of the transparent conductive layer 30. A transparent conductive layer 50 is provided on the outside of the other surface (the top surface in the figure) of the light-controlling layer 20, and a transparent substrate layer 60 is provided on the outside of the transparent conductive layer 50. As described above, the light-controlling sheet 10 includes the light-controlling layer 20, a pair of transparent conductive layers 30, 50 located on both sides of the light-controlling layer 20, and a pair of transparent substrate layers 40, 60 located on both sides of the pair of transparent conductive layers 30, 50. The transparent conductive layer 30 and the transparent substrate layer 40 form a first outer support layer 70 located on the outside of one surface (the bottom surface in the figure) of the light-controlling layer 20, and the transparent conductive layer 50 and the transparent substrate layer 60 form a second outer support layer 80 located on the outside of the other surface (the top surface in the figure) of the light-controlling layer 20.

[0043] The transparent conductive layers 30, 50 are transparent layers having electrical conductivity. Examples of materials that can be used to form the transparent conductive layers 30, 50 include indium tin oxide (ITO), fluorine-doped tin oxide (FTO), tin oxide, zinc oxide, carbon nanotubes (CNT), polymers containing poly(3,4-ethylenedioxythiophene) (PEDOT), and multilayer films containing Ag alloy thin films. The transparent substrate layers 40, 60 are layers that contain a material such as PET (Polyethylene Terephthalate).

[0044] An additional or alternative layer may be provided as an "outer support layer" located outside the transparent substrate layer 40, 60. In other words, the number and type of "outer support layer" can be freely determined, allowing for various design modifications. For example, a transparent support layer made of a transparent substrate may be provided as the "outer support layer." Examples of the transparent support layer include a glass substrate, a silicon substrate, or a polymer film made of polyethylene, polystyrene, polyethylene terephthalate, polyvinyl alcohol, polycarbonate, polyvinyl chloride, polyimide, polysulfone, cycloolefin polymer, triacetyl cellulose, etc. Furthermore, examples of the "outer support layer" include a layer for protecting the light-controlling layer 20, the transparent conductive layer 30, 50, or the transparent substrate layer 40, 60; a layer that contributes to controlling the light transmittance of the light-controlling sheet 10; and a layer that enhances the strength, heat resistance, and other properties of the light-controlling sheet 10. For example, the "pair of outer support layers" located on both sides of the photochromic layer 20 may each include at least one of a transparent conductive layer, a transparent substrate layer, a hard coat layer, an adhesive layer, an index matching layer, a UV cut layer, an IR cut layer, and a colored layer as a functional film.

[0045] Although not shown in the drawings, the outer peripheral end portions (end faces) of the light controlling sheet 10 may not be flush, and may be arranged so that their positions are offset from each other when viewed in a plan view.

[0046] For example, when focusing on a certain end (end surface) of the light-controlling sheet 10, the first outer support layer 70 provided on one side (the bottom surface in the figure) of the light-controlling layer 20 has a half-cut portion that protrudes (projects) laterally from the second outer support layer 80 provided on the other side (the top surface in the figure) of the light-controlling layer 20, and this half-cut portion may be provided with an electrode portion and a wiring portion (not shown) that apply a driving voltage to the light-controlling sheet 10 (light-controlling layer 20).

[0047] Furthermore, when looking at another end (end surface) of the light-controlling sheet 10, the second outer support layer 80 provided on the other side (top surface in the figure) of the light-controlling layer 20 has a half-cut portion that protrudes (projects) laterally more than the first outer support layer 70 provided on one side (bottom surface in the figure) of the light-controlling layer 20, and this half-cut portion may be provided with an electrode portion and a wiring portion (not shown) that apply a driving voltage to the light-controlling sheet 10 (light-controlling layer 20).

[0048] In the light-controlling sheet 10 configured as described above, when a driving current is passed through the transparent conductive layers 30, 50 via the electrode portion and wiring portion (not shown), a driving voltage is applied between the transparent conductive layers 30, 50, i.e., to the light-controlling layer 20.

[0049] When no driving voltage is applied between the transparent conductive layers 30 and 50 (the light-controlling layer 20), the orientation of the long axes of the liquid crystal molecules in the light-controlling layer 20 is irregular. As a result, light incident on the light-controlling layer 20 is scattered, and the light-controlling sheet 10 appears cloudy (white light-controlling). In other words, the light-controlling sheet 10 is opaque.

[0050] On the other hand, when a driving voltage is applied between the transparent conductive layers 30 and 50 (the light-controlling layer 20), the liquid crystal molecules in the light-controlling layer 20 are oriented, with the long axis direction of the liquid crystal molecules oriented along the electric field direction between the transparent conductive layers 30 and 50. As a result, light is more easily transmitted through the light-controlling layer 20, and the light-controlling sheet 10 becomes transparent. In this way, the light-controlling sheet 10 functions as a normal type (normal mode).

[0051] The light-controlling sheet 10 may also include a pair of alignment layers sandwiching the light-controlling layer 20 between the light-controlling layer 20 and the transparent conductive layers 30 and 50. The alignment layers control the alignment of the liquid crystal molecules contained in the light-controlling layer 20, and align the liquid crystal molecules along the normal direction of the alignment layers when no driving voltage is applied. In a configuration including alignment layers, the light-controlling sheet 10 becomes opaque when a driving voltage is applied between the transparent conductive layers 30 and 50 (the light-controlling layer 20). When no driving voltage is applied between the transparent conductive layers 30 and 50 (the light-controlling layer 20), the light-controlling sheet 10 becomes transparent (functioning as a reverse type (reverse mode)). Examples of materials that can be used to form the alignment layers include organic compounds such as polyimide, polyamide, polyvinyl alcohol, and cyanide compounds, inorganic compounds such as silicon oxide and zirconium oxide, and silicone. Examples of alignment treatments for forming the alignment layers include rubbing, polarized light irradiation, and microfabrication.

[0052] The light-switching layer 20 may also contain a dye having a predetermined color that does not interfere with the movement of liquid crystal molecules in response to the magnitude of the voltage applied to the light-switching layer 20. A dichroic dye and black spacers may also be added to the light-switching layer 20. This configuration achieves a light-switching sheet 10 having a predetermined color. In other words, black light control and color light control are possible.

[0053] The light controlling sheet 10 is used for various purposes, for example, by cutting into a desired shape a large sheet made of a multilayer body including each layer that constitutes the light controlling sheet 10. For example, the light controlling sheet 10 can be used in a variety of applications, such as a light controlling film that blocks view from inside and outside only at specific times, in place of normally transparent glass, office partitions, laminated glass, frosted glass, etc. The light controlling sheet 10 can also be installed in the upper region of a car's windshield to provide a partial sun visor function.

[0054] <Specific embodiment> First Embodiment Fig. 2 is a cross-sectional view showing the configuration of the light control device 1 of the first embodiment. In Fig. 2, the transparent conductive layer 30 and the transparent substrate layer 40 are depicted as a first outer support layer 70 without distinction, and the transparent conductive layer 50 and the transparent substrate layer 60 are depicted as a second outer support layer 80 without distinction.

[0055] 2, the light control device 1 has a light control sheet 10. The light control sheet 10 has a light control layer 20, a first outer support layer 70 located on the outside of one surface (the bottom surface in the figure) of the light control layer 20, and a second outer support layer 80 located on the outside of the other surface (the top surface in the figure) of the light control layer 20.

[0056] In the light-adjusting sheet 10, the first outer support layer 70 has a lateral protruding surface 71 that protrudes laterally (here, to the left) beyond the end face (here, the left end face) 21 of the light-adjusting layer 20 and the end face (here, the left end face) 81 of the second outer support layer 80.

[0057] In the light-modulating sheet 10, the second outer support layer 80 is provided with a protruding burr surface (protruding surface, protruding engagement surface, protruding hook surface) 82 that protrudes on the side opposite the light-modulating layer 20 so as to be continuous with an end surface (here, the left end surface) 81 of the second outer support layer 80. The protruding burr surface 82 has a first surface 82X located on an extension of the end surface (here, the left end surface) 81 of the second outer support layer 80, and a second surface 82Y that extends at an acute angle from the tip of this first surface 82X to the surface of the second outer support layer 80 opposite the light-modulating layer 20 (the upper surface in the figure).

[0058] The light control device 1 has a sealing layer 90 that seals at least a portion of the periphery of the light control sheet 10. The sealing layer 90 is made of, for example, a material that can be UV-cured in a short time. The sealing layer 90 may be made of a material that has curing properties such as UV curing, heat curing, or moisture absorption curing. The sealing layer 90 may also be made of a coating-type material such as epoxy resin, acrylic resin, or silicone resin, or may be a tape-shaped material. The sealing layer 90 has a function of protecting the electrode parts and wiring parts (not shown) provided on the light control sheet 10, the exposed ends of the light control layer 20, transparent conductive layers 30 and 50, and transparent base layers 40 and 60, and further the translucent member (e.g., glass).

[0059] The sealing layer 90 seals the lateral protruding surface 71 of the first outer support layer 70, the end surface (here, the left end surface) 21 of the photochromic layer 20, and the end surface (here, the left end surface) 81 of the second outer support layer 80 of the photochromic sheet 10, and also seals the surface of the second outer support layer 80 opposite the photochromic layer 20 (the top surface in the figure) so as to straddle (go over) the protruding burr surface 82 (first surface 82X, second surface 82Y) (forming such a sealing block).

[0060] The sealing layer 90 has a tapered surface 91 extending from the uppermost end of the end surface (here, the left end surface) of the first outer support layer 70 toward the protruding burr surface 82 in a portion sealing the laterally protruding surface 71 of the first outer support layer 70, the end surface (here, the left end surface) 21 of the photochromic layer 20, and the end surface (here, the left end surface) 81 of the second outer support layer 80. Furthermore, the sealing layer 90 has a curved surface portion 92 formed from the tip of the tapered surface 91 so as to straddle (surpass) the first surface 82X and the second surface 82Y of the protruding burr surface 82.

[0061] The second outer support layer 80 is provided with a protruding burr surface 82 that protrudes on the side opposite the light-controlling layer 20 so as to be continuous with the end face (here, the left end face) 81 of the second outer support layer 80, and the sealing layer 90 seals the side of the second outer support layer 80 opposite the light-controlling layer 20 (the top face in the figure) so as to straddle (go over) the protruding burr surface 82, thereby causing the sealing layer 90 and the protruding burr surface 82 to engage (act as a hook), thereby providing a highly stable sealing layer 90 on the light-controlling sheet 10 (preventing the sealing layer 90 from slipping or coming off the light-controlling sheet 10).

[0062] 2, when the protruding height of the protruding burr surface 82 from the surface of the second outer support layer 80 opposite the light-controlling layer 20 (the top surface in the figure) is defined as a (μm), the relationship 50≦a≦100 is satisfied. By satisfying this condition, the engagement (hook action) between the sealing layer 90 and the protruding burr surface 82 is further strengthened, and the sealing layer 90 can be provided on the light-controlling sheet 10 with high stability (the sealing layer 90 can be prevented from slipping or coming off the light-controlling sheet 10).

[0063] As described above, the protruding burr surface 82 has a first surface 82X located on an extension of the end surface (here, the left end surface) 81 of the second outer support layer 80, and a second surface 82Y extending at an acute angle from the tip of this first surface 82X to the surface of the second outer support layer 80 opposite the light-controlling layer 20 (the upper surface in the figure). By configuring the protruding burr surface 82 in this manner, the engagement (hook action) between the sealing layer 90 and the protruding burr surface 82 is made even stronger, making it possible to provide the sealing layer 90 with high stability on the light-controlling sheet 10 (preventing the sealing layer 90 from slipping or coming off the light-controlling sheet 10).

[0064] The protruding burr surface 82 and the sealing region of the sealing layer 90 that seals by spanning (surpassing) the protruding burr surface 82 are preferably provided over the entire peripheral edge (whole circumference) of the light-adjusting sheet 10. This further strengthens the engagement (hook action) between the sealing layer 90 and the protruding burr surface 82, allowing the sealing layer 90 to be provided on the light-adjusting sheet 10 with high stability (preventing the sealing layer 90 from shifting or coming off the light-adjusting sheet 10).

[0065] 3 is an optical microscope photograph showing the peripheral edge of the light control sheet 10 in the light control device 1 of the first embodiment sealed with a sealing layer 90. The second outer support layer 80 (upper substrate) is cut based on predetermined half-cut conditions to generate a protruding burr surface 82. By providing the protruding burr surface 82, the contact area between the sealing layer 90 and the second outer support layer 80 (upper substrate) increases, making it possible to prevent peeling of the sealing layer 90 due to spreading of the interlayer film during the laminating glass process.

[0066] Second Embodiment 4 is a cross-sectional view showing the configuration of the light control device 1 of the second embodiment. The same (common) components as those in the first embodiment (FIG. 2) are denoted by the same (common) reference numerals, and duplicated explanations will be omitted.

[0067] In the second embodiment, the end face (left end face) of the second outer support layer 80 has a tapered surface 83 that approaches the protruding burr surface 82 as it extends from the surface on the side of the light control layer 20 toward the surface opposite to the light control layer 20. Further, when the angle of the tapered surface 83 of the second outer support layer 80 is b (°), it satisfies 90 < b ≤ 120.

[0068] Also, in the portion where the sealing layer 90 seals the side protruding surface 71 of the first outer support layer 70, the end face (here, the left end face) 21 of the light control layer 20, and the tapered surface 83 of the second outer support layer 80, the sealing layer 90 has a tapered surface 91 that extends from the uppermost end portion of the end face (here, the left end face) of the first outer support layer 70 toward the protruding burr surface 82. Further, the angle of the tapered surface 83 of the second outer support layer 80 and the angle of the tapered surface 91 of the sealing layer 90 are different from each other.

[0069] By providing the tapered surface 83 on the second outer support layer 80, providing the tapered surface 91 on the sealing layer 90, and setting the angle of the tapered surface 83 of the second outer support layer 80 and the angle of the tapered surface 91 of the sealing layer 90 as described above, the effect of providing the sealing layer 90 with high stability on the light control sheet 10 can be enhanced.

[0070] Furthermore, in the second embodiment, the first surface 82X of the protruding burr surface 82 is located on the extension of the tapered surface 83 and forms an acute angle with the surface opposite to the light control layer 20 (the upper surface in the figure) of the second outer support layer 80. In addition, the second surface 82Y of the protruding burr surface 82 extends at an acute angle from the tip of the first surface 82X to the surface opposite to the light control layer 20 (the upper surface in the figure) of the second outer support layer 80. That is, when the cross-sectional shape of the protruding burr surface 82 is regarded as a triangle, the triangle forms an acute triangle. Thereby, the effect of providing the sealing layer 90 with high stability on the light control sheet 10 can be enhanced.

[0071] <Third Embodiment> FIG. 5 is a cross-sectional view showing the configuration of the light control device 1 according to the third embodiment. The same (common) components as those in the second embodiment (FIG. 4) are denoted by the same (common) reference numerals, and redundant descriptions are omitted.

[0072] The light control device 1 of the third embodiment (FIG. 5) is the light control device 1 of the second embodiment (FIG. 4) in which the protruding burr surfaces 82 (first surface 82X, second surface 82Y) are omitted. Even when the protruding burr surfaces 82 (first surface 82X, second surface 82Y) are omitted, the effect of providing the sealing layer 90 with high stability on the light control sheet 10 can be obtained by providing a tapered surface 83 on the second outer support layer 80 and a tapered surface 91 on the sealing layer 90, and appropriately setting the angle of the tapered surface 83 of the second outer support layer 80 and the angle of the tapered surface 91 of the sealing layer 90.

[0073] 6 is an optical microscope photograph showing the peripheral edge of the light control sheet 10 in the light control device 1 of the third embodiment sealed with a sealing layer 90. The second outer support layer 80 (upper substrate) is cut based on predetermined half-cut conditions to provide a tapered surface 83. By providing the tapered surface 83, the contact area between the sealing layer 90 and the second outer support layer 80 (upper substrate) increases, making it possible to prevent peeling of the sealing layer 90 due to spreading of the interlayer film during the laminating glass process.

[0074] <Fourth embodiment> 7 is a cross-sectional view showing the configuration of the light control device 1 of the fourth embodiment. The same (common) components as those in the first embodiment (FIG. 2) are denoted by the same (common) reference numerals, and redundant explanations will be omitted.

[0075] The light control device 1 of the fourth embodiment (FIG. 7) has basically the same configuration as the light control device 1 of the first embodiment (FIG. 2). However, the light control device 1 of the fourth embodiment (FIG. 7) is drawn in a form that is reversed from left to right compared to the light control device 1 of the first embodiment (FIG. 2).

[0076] In the fourth embodiment of the light control device 1 ( FIG. 7 ), when the length (width) of the laterally protruding surface 71 of the first outer support layer 70 is c (mm) and the total length (thickness) of the end face (here, the right end face) 21 of the light control layer 20 and the end face (here, the right end face) 81 of the second outer support layer 80 is d (mm), c≧3d is satisfied. By satisfying this condition, in combination with the engagement (hook action) between the sealing layer 90 and the protruding burr surface 82 (due to a synergistic effect), the sealing layer 90 can be provided on the light control sheet 10 with high stability (the sealing layer 90 can be prevented from slipping or coming off from the light control sheet 10).

[0077] 8A and 8B are diagrams showing a state in which a glass laminating process is performed on the light control device 1 (FIG. 7) of the fourth embodiment. In the glass laminating process, an intermediate film 110 is interposed between a pair of upper and lower glasses (light-transmitting members) 100, and the light control device 1 (FIG. 7) of the fourth embodiment is supported by being sandwiched between them.

[0078] Referring to Figure 7, when focusing on the dimming device 1 alone, when the sealing material is applied from the peripheral portion of the dimming sheet 10 (e.g., the upper side of the second outer support layer 80), the length (width) c of the lateral protruding surface 71 of the first outer support layer 70 is sufficiently secured, so that the sealing material can be prevented from leaking to the half-cut side (e.g., the end face side of the first outer support layer 70).

[0079] Furthermore, referring to Figures 8A and 8B, when focusing on the glass laminating process, satisfying c≧3d increases the area of ​​contact between the sealing layer 90 and the first and second outer support layers 70, 80 (e.g., upper and lower substrates), thereby preventing peeling of the sealing layer 90 due to spreading of the interlayer film 110 during the glass laminating process.

[0080] Fifth Embodiment 9 is a cross-sectional view showing the configuration of the light control device 1 of the fifth embodiment. The same (common) components as those of the fourth embodiment (FIG. 7) are denoted by the same (common) reference numerals, and redundant explanations will be omitted.

[0081] The light control device 1 of the fifth embodiment (FIG. 9) is the light control device 1 of the fourth embodiment (FIG. 7) in which the protruding burr surfaces 82 (first surface 82X, second surface 82Y) are omitted. Even when the protruding burr surfaces 82 (first surface 82X, second surface 82Y) are omitted, by satisfying the above-mentioned c≧3d, the sealing layer 90 can be provided on the light control sheet 10 with high stability (the sealing layer 90 can be prevented from shifting or coming off from the light control sheet 10).

[0082] Sixth Embodiment 10 is a cross-sectional view showing the configuration of the light control device 1 of the sixth embodiment. The same (common) components as those in the first embodiment (FIG. 2) are denoted by the same (common) reference numerals, and redundant explanations will be omitted.

[0083] The light control device 1 of the sixth embodiment (FIG. 10) differs from the light control device 1 of the first embodiment (FIG. 2) in that the shape of the sealing layer 90 is different. The sealing layer 90 has a curved surface 93 that integrally seals the laterally protruding surface 71 of the first outer support layer 70, the end surface (left end surface) 21 of the light control layer 20, the end surface (left end surface) 81 of the second outer support layer 80, the protruding burr surface 82 (first surface 82X, second surface 82Y), and the surface (top surface) of the second outer support layer 80 opposite the light control layer 20. Even when the sealing layer 90 is composed only of the curved surface portion 93 (without a tapered surface), the sealing layer 90 can be provided on the light control sheet 10 with high stability (the sealing layer 90 can be prevented from shifting or coming off the light control sheet 10).

[0084] <Numerical examples and demonstration experiments> The present inventors conducted a demonstration experiment to demonstrate the superiority of the dimming device and dimming module of this embodiment. Fig. 11 shows the results of the experiment to demonstrate the superiority of the dimming device and dimming module of this embodiment.

[0085] In the demonstration experiment, samples according to Numerical Examples 1-12 and Comparative Examples 1-9 were prepared, and each sample was evaluated for whether it satisfied each of the constituent requirements of this embodiment, and for leakage of the sealing layer and peeling of the sealing layer.

[0086] Regarding the evaluation of sealing layer leakage, visual evaluation during sealing layer application was performed. A "good" was given if there was no sealing layer leakage; a "good" was given if there was some leakage of the sealing layer but within the acceptable range and no impact on the product; and an "unacceptable" was given if there was leakage of the sealing layer, which may have an adverse effect on the product. Regarding the evaluation of sealing layer peeling, visual evaluation after laminated glass processing was performed. A "good" was given if there was no sealing layer peeling; a "good" was given if there was some sealing layer peeling but within the acceptable range and no impact on the product; and an "unacceptable" was given if there was peeling of the sealing layer, which may have an adverse effect on the product. For each evaluation item, "good" and "good" were considered to be pass marks in the demonstration experiment, and "good" was considered to be fail marks in the demonstration experiment. In other words, a case in which both sealing layer leakage and sealing layer peeling were evaluated as "good" or "good" was considered to be pass marks in the demonstration experiment, and a case in which at least one of the sealing layer leakage and sealing layer peeling evaluations was evaluated as "bad" was considered to be fail marks in the demonstration experiment.

[0087] In FIG. 11, the areas of the samples according to Numerical Examples 1-12 and Comparative Examples 1-9 that do not satisfy the constituent requirements of this embodiment are shown with a grayscale background, and the areas that satisfy the constituent requirements of this embodiment are shown with a white background without a grayscale.

[0088] The sealing layer for each sample was fabricated using the following method. A Musashi Engineering MJET-S-2 dispenser was used. The sealing material used for the sealing layer was an acrylic UV-curable resin. The film thickness and width of the sealing layer were controlled by the sealant discharge pressure and sealant discharge speed of the dispenser. PVB (polyvinyl butyral) was used as the interlayer for the laminated glass. The protruding height (a) of the protruding burr surface of the sealing layer, the angle (b) of the tapered surface of the second outer support layer, and the angle of the tapered surface of the sealing layer were measured using an optical microscope. The length (c) of the lateral protruding surface of the first outer support layer (the corresponding length of the sealing layer) was measured using a microscope. The total length (d) of the end face of the photochromic layer and the end face of the second outer support layer (the corresponding length of the sealing layer) was measured using a high-precision contact digital sensor (Keyence, GT2-P12KL). The values ​​of a, b, c, and d were calculated by taking the average of 10 sampling values ​​in the extension direction of the sealing layer and other components (for example, the circumferential direction when the sealing layer is formed on the periphery of the light-control sheet).

[0089] As shown in FIG. 11 , Numerical Examples 1-12, which satisfy the requirement of "protruding burr surface and sealing layer spanning it," were evaluated as "good" for sealing layer peeling. Numerical Examples 2, 3, and 5-12, which satisfy the requirement of "c≧3d," were evaluated as "good" for sealing layer leakage. Numerical Examples 1 and 4, which do not satisfy the requirement of "c≧3d," were also evaluated as "fair," falling within the acceptable range. As a result, all of Numerical Examples 1-12 passed the evaluations of sealing layer leakage and sealing layer peeling, earning either a "good" or a "fair" rating. In contrast, Comparative Example 1-7, which does not satisfy the requirements of "protruding burr surface and sealing layer spanning it" and "c≧3d," was evaluated as "bad" for both sealing layer leakage and sealing layer peeling. Comparative Examples 8 and 9, which do not satisfy the requirement of "protruding burr surface and sealing layer spanning it," were evaluated as "bad" for sealing layer leakage, falling within the acceptable range. In this way, the superiority of Numerical Example 1-12 over Comparative Example 1-9 is demonstrated.

[0090] Thus, the light control device of this embodiment is a light control device attached to a light-transmitting member, and includes a light control sheet having a light control layer, a first outer support layer located on the outside of one side of the light control layer, and a second outer support layer located on the outside of the other side of the light control layer; in the light control sheet, the first outer support layer has a lateral protruding surface that protrudes laterally beyond the end surface of the light control layer and the end surface of the second outer support layer; in the light control sheet, the second outer support layer has a protruding burr surface that protrudes on the side opposite the light control layer so as to be continuous with the end surface of the second outer support layer; and in the light control sheet, a sealing layer that seals the lateral protruding surface of the first outer support layer, the end surface of the light control layer, and the end surface of the second outer support layer, and seals the side of the second outer support layer opposite the light control layer so as to straddle the protruding burr surface. This allows the sealing layer to be provided on the light control sheet with high stability.

[0091] The present invention is not limited to the above-described embodiments, and various modifications can be made in the implementation stage without departing from the spirit of the invention. Furthermore, the embodiments may be implemented in appropriate combinations, in which case the combined effects can be obtained. Furthermore, the above-described embodiments include various inventions, and various inventions can be extracted by combining selected elements from the disclosed elements. For example, if the problem can be solved and the desired effect can be obtained even if some elements are deleted from all elements shown in the embodiments, the configuration from which these elements are deleted can be extracted as an invention. [Explanation of symbols]

[0092] 1. Dimmer 10. Light-controlling sheet (light-controlling film) 20 Dimming layer (liquid crystal layer) 21 End face 30 Transparent conductive layer 40 Transparent base layer 50 Transparent conductive layer 60 Transparent base layer 70 First outer support layer 71 Lateral protruding surface 80 second outer support layer 81 End face 82 Protruding burr surface (protruding surface, protruding engagement surface, protruding hook surface) 82X First Side 82Y Second Side 83 Tapered surface 90 Sealing layer 91 Tapered surface 92 Curved surface part 93 Curved surface part 100 Glass (translucent material) 110 Interlayer

Claims

1. A light control device attached to a light-transmitting member, A light-controlling sheet having a light-controlling layer, a first outer support layer located outside one side of the light-controlling layer, and a second outer support layer located outside the other side of the light-controlling layer; In the light-controlling sheet, the first outer support layer has a side protruding surface that protrudes laterally beyond an end surface of the light-controlling layer and an end surface of the second outer support layer; In the light-controlling sheet, the second outer support layer has a protruding burr surface that protrudes from an end surface of the second outer support layer to the opposite side of the light-controlling layer so as to be continuous with the end surface of the second outer support layer; A sealing layer of the light-controlling sheet seals the side protruding surface of the first outer support layer, the end surface of the light-controlling layer, and the end surface of the second outer support layer, and seals the surface of the second outer support layer opposite the light-controlling layer so as to straddle the protruding burr surface; A light control device comprising:

2. When the protruding height of the protruding burr surface from the surface of the second outer support layer opposite to the light-controlling layer is a (μm), the relationship 50≦a≦100 is satisfied. The light control device according to claim 1 .

3. The protruding burr surface has a first surface located on an extension of the end surface of the second outer support layer, and a second surface extending at an acute angle from a tip of the first surface to a surface of the second outer support layer opposite to the photochromic layer, The light control device according to claim 1 .

4. an end surface of the second outer support layer having a tapered surface that approaches the protruding burr surface from the surface on the side of the photochromic layer toward the surface opposite the photochromic layer; The light control device according to claim 1 .

5. When the angle of the tapered surface of the second outer support layer is b (°), 90<b≦120 is satisfied. The light control device according to claim 4 .

6. the sealing layer has a tapered surface extending from the end surface of the first outer support layer toward the protruding burr surface in a portion sealing the laterally protruding surface of the first outer support layer, the end surface of the light control layer, and the tapered surface of the second outer support layer; The light control device according to claim 4 .

7. The angle of the tapered surface of the second outer support layer and the angle of the tapered surface of the sealing layer are different from each other. The light control device according to claim 6 .

8. The sealing layer has a curved surface portion that integrally seals the laterally protruding surface of the first outer support layer, the end surface of the photochromic layer, the end surface of the second outer support layer, the protruding burr surface, and the surface of the second outer support layer opposite to the photochromic layer. The light control device according to claim 1 .

9. When the length of the laterally protruding surface of the first outer support layer is c (mm) and the total length of the end surface of the light-controlling layer and the end surface of the second outer support layer is d (mm), c≧3d is satisfied. The light control device according to claim 1 .

10. A light-transmitting member; a light control device attached to the light-transmitting member; A dimming module having: The light control device is A light-controlling sheet having a light-controlling layer, a first outer support layer located outside one side of the light-controlling layer, and a second outer support layer located outside the other side of the light-controlling layer; In the light-controlling sheet, the first outer support layer has a side protruding surface that protrudes laterally beyond an end surface of the light-controlling layer and an end surface of the second outer support layer; In the light-controlling sheet, the second outer support layer has a protruding burr surface that protrudes from an end surface of the second outer support layer to the opposite side of the light-controlling layer so as to be continuous with the end surface of the second outer support layer; A sealing layer of the light-controlling sheet seals the side protruding surface of the first outer support layer, the end surface of the light-controlling layer, and the end surface of the second outer support layer, and seals the surface of the second outer support layer opposite the light-controlling layer so as to straddle the protruding burr surface; A dimming module comprising:

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