Light control member and light control module

Abstract

To provide a light control member and a light control module which easily understand a boundary part between existence and absence parts of the light control member in an effective area of a translucent member, so as to be able to improve the convenience of a viewer.SOLUTION: A light control member attached to a translucent member includes: an end-part area entering an effective area of the translucent member when attached to the translucent member; and a sealing area for sealing the end-part area. The sealing area has a thickness variation of 20 μm or more in an extending direction of the end-part area, so as to form indexes for understanding the end-part area in the effective area of the translucent member.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a light control member and a light control module. [Background technology]

[0002] Patent Document 1 describes a laminated glass comprising a first glass plate, a second glass plate facing the first glass plate, a light control element connected to a power supply, an adhesive, and a sealing member positioned between the first and second glass plates. The sealing member overlaps at least a portion of the periphery of the first glass plate in a plan view. The adhesive contacts the first and second main surfaces and side surfaces of the first and second glass plates and the light control element. The adhesive contains a curable transparent resin. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2022 / 039089 Summary of the Invention [Problem to be solved by the invention]

[0004] In the laminated glass described in Patent Document 1, the effective area of ​​the glass sheets is defined. The effective area of ​​the glass sheets is defined as, for example, an exposed portion of the glass sheets (e.g., the first and second glass sheets) that is not covered by a frame member or the like.

[0005] Furthermore, it is conventional technical knowledge that the size of the light control member is larger than the effective area of ​​the glass plate in laminated glass such as that described in Patent Document 1. In other words, the light control member covers the entire effective area of ​​the glass plate, so that it is possible to switch between whether the light control function of the light control member is exerted (opaque) and whether the light control function of the light control member is not exerted (transparent) across the entire effective area of ​​the glass plate.

[0006] Meanwhile, the present inventors are developing and researching laminated glass in which the size of the light control element is smaller than the effective area of ​​the glass plate. In this case, the boundary between the area where the light control element is present and the area where it is not present (the edge of the light control element) will be included in the effective area of ​​the glass plate. The area where the light control element is present in the effective area of ​​the glass plate will be the "dimming area (which can be switched between a dimming area and a non-dimming area depending on the driving state of the light control element)," while the area where the light control element is not present in the effective area of ​​the glass plate will be the "non-dimming area (which cannot have a dimming function because there is no light control element)."

[0007] However, because it is difficult to grasp (identify) the boundary (edge ​​of the dimming element) between the area where the dimming element is present and the area where it is not present in the effective area of ​​the glass plate, there is room for improvement in terms of convenience for the viewer. For example, when the dimming element is in the non-actuated state (transparent state), if the dimming element is changed to the actuated state (opaque state), it is difficult for the viewer to grasp (identify) which areas of the effective area of ​​the glass plate become opaque and which areas remain transparent.

[0008] The present invention was completed based on the above-mentioned concerns, and aims to provide a dimming element and dimming module that can improve convenience for the viewer by making it easy to grasp the boundary between the areas where the dimming element is present and the areas where it is not present in the effective area of ​​the translucent element. [Means for solving the problem]

[0009] The light-adjusting component of this embodiment is a light-adjusting component that is attached to a light-transmitting component, and has an end region that enters the effective region of the light-transmitting component when attached to the light-transmitting component, and a sealing region that seals the end region, and the sealing region has a thickness variation in the extension direction of the end region of 20 μm or more, thereby forming an indicator for identifying the end region in the effective region of the light-transmitting component. [Effects of the Invention]

[0010] According to the present invention, a dimming element and dimming module can be provided that can improve convenience for the viewer by making it easy to grasp the boundary between the areas where the dimming element is present and the areas where it is not present in the effective area of ​​the translucent element. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 2 is a plan view showing an example of the configuration of the light control module of the present embodiment. [Figure 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Figure 3] FIG. 2 is an enlarged view showing various parameters of the light control member and light control module of the present embodiment. [Figure 4] 10 is a cross-sectional view corresponding to FIG. 2 showing another embodiment of the light control module of the present embodiment. [Figure 5] FIG. 10 is a diagram showing an example of the effect of the indicator (hazy unevenness and covering portion) in an opaque state in which the dimming function of the dimming element is exerted and in a transparent state in which the dimming function of the dimming element is not exerted. [Figure 6] 5 is a cross-sectional view corresponding to FIG. 4 showing another embodiment of the light control module of the present embodiment. [Figure 7] 10A and 10B are diagrams illustrating yet another embodiment of the dimming module of the present embodiment. [Figure 8] 5 and shows yet another embodiment of the dimming module of the present embodiment. FIG. [Figure 9] 10A and 10B are diagrams showing the results of demonstration experiments of Numerical Examples 1-4 and Comparative Examples 1-10. [Figure 10] FIG. 1 is a diagram illustrating an example of a conventional technical problem. DETAILED DESCRIPTION OF THE INVENTION

[0012] <Definitions of terms, etc.> 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, the term "dimming module" refers to a light-transmitting member and a dimming component attached to the light-transmitting member. As its name suggests, a light-transmitting member has translucency as its own property. A dimming component ensures the translucency of the light-transmitting member and the dimming module (becoming transparent) by not exerting its dimming function, and inhibits the translucency of the light-transmitting member and the dimming module (becoming opaque) by exerting its dimming function. Dimming components come in two types: a normal type (normal mode) that is transparent when energized and opaque when deenergized, and a reverse type (reverse mode) that is transparent when deenergized and opaque when energized. The dimming function of a dimming component refers to the normal type when not energized and the reverse type when energized. The dimming function of a dimming component is not exerted may refer to the normal type when energized and the reverse type when deenergized. Furthermore, in this specification, the term "light control member" refers to a component of a light control module, and refers to the light control member in a state before being attached to the light-transmitting member.

[0014] In this specification, the dimming method using the dimming module (dimming component) may be, for example, a polymer dispersed liquid crystal, a polymer dispersed liquid crystal (PDLC: Polymer Dispersed Liquid Crystal) method, or a polymer network liquid crystal (PNLC: Polymer Network Liquid Crystal) method. Alternatively, the dimming method using the dimming module (dimming component) may be one that uses EC (Electrochromic), GHLC (Guest-Host Liquid Crystal), or SPD (Suspended Particle Device).

[0015] In this specification, the "effective area of ​​the light-transmitting member" is defined as the exposed portion of the light-transmitting member that is not covered by a frame member, etc. For example, if the light-transmitting member is the windshield of an automobile, the entire exposed surface of the windshield corresponds to the "effective area of ​​the light-transmitting member," if the light-transmitting member is a window glass of a building or house, the entire exposed surface of the window glass corresponds to the "effective area of ​​the light-transmitting member," and if the light-transmitting member is a partition, the entire exposed surface of the partition corresponds to the "effective area of ​​the light-transmitting member."

[0016] In this specification, the light-transmitting member to which the light control member is attached may include so-called one-piece or two-piece light-transmitting members. In the case of a one-piece light-transmitting member, the light control member 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 member may be supported by being sandwiched between the two light-transmitting members through an intermediate layer (intermediate film), or the light control member may be attached to the surface of one of the two light-transmitting members.

[0017] In this specification, the terms "upper surface" and "lower surface" may be defined as, for example, the upper and lower surfaces in a drawing (these may be defined based on the vertical direction in the drawing). Furthermore, in this specification, the terms "outside" and "outer support layer" may be defined as the outside of a certain reference (center) layer, or as a layer supported on the outside of the 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 support layer" supported on the "outside" of layer A, and layer C is an "outer support layer" supported on the "outside" of layers A and B. In this sense, "outside" and "outer support layer" may be interpreted as "upper layer" and "upper support layer," and in this case, the further away from the certain reference (center) layer, the higher the layer is defined, and the closer to the certain reference (center) layer, the lower the layer is defined.

[0018] <Conventional technical issues> In recent years, attempts have been made to apply light-controlling devices that control the light transmittance of liquid crystals to applications other than display applications, such as windows in buildings or vehicles, and various proposals have been made. A typical example is laminated glass that uses a liquid crystal light-controlling film, which is made by sandwiching liquid crystals between a pair of transparent substrates with conductive films. Light-controlling films can be used for anti-glare applications by switching between transparent and opaque. It is also anticipated that in the future, laminated glass will be developed that uses a liquid crystal light-controlling film that can be switched between transparent and opaque over an area smaller than the size of the glass.

[0019] In the laminated glass described in the above-mentioned Patent Document 1, an effective area of ​​the glass sheets is defined. The effective area of ​​the glass sheets is defined as, for example, an exposed portion of the glass sheets (e.g., the first and second glass sheets) that is not covered by a frame member or the like.

[0020] Furthermore, it is conventional technical knowledge that the size of the light control member is larger than the effective area of ​​the glass plate in laminated glass such as that described in Patent Document 1. In other words, the light control member covers the entire effective area of ​​the glass plate, so that it is possible to switch between whether the light control function of the light control member is exerted (opaque) and whether the light control function of the light control member is not exerted (transparent) across the entire effective area of ​​the glass plate.

[0021] Meanwhile, the present inventors are developing and researching laminated glass in which the size of the light control element is smaller than the effective area of ​​the glass plate. In this case, the boundary between the area where the light control element is present and the area where it is not present (the edge of the light control element) will be included in the effective area of ​​the glass plate. The area where the light control element is present in the effective area of ​​the glass plate will be the "dimming area (which can be switched between a dimming area and a non-dimming area depending on the driving state of the light control element)," while the area where the light control element is not present in the effective area of ​​the glass plate will be the "non-dimming area (which cannot have a dimming function because there is no light control element)."

[0022] However, because it is difficult to grasp (identify) the boundary (edge ​​of the dimming element) between the area where the dimming element is present and the area where it is not present in the effective area of ​​the glass plate, there is room for improvement in terms of convenience for the viewer. For example, when the dimming element is in the non-actuated state (transparent state), if the dimming element is changed to the actuated state (opaque state), it is difficult for the viewer to grasp (identify) which areas of the effective area of ​​the glass plate become opaque and which areas remain transparent.

[0023] Figure 10 illustrates an example of a conventional technical problem. Figure 10 shows an example in which a photochromic element is installed near the upper edge of the glass to provide a sun visor function. As shown in Figure 10, the portion of the glass's effective area where the photochromic element is present is the photochromic area, and the portion without the photochromic element is the non-photochromic area. Even if the photochromic element is used to provide the photochromic function, if sunlight enters through the non-photochromic area, the sun visor function cannot be achieved (it's dazzling even though it's supposed to be opaque!). However, because the boundary between the photochromic and non-photochromic areas is unclear, it is difficult for a viewer to determine (identify) which portions of the glass are opaque and which remain transparent when the photochromic element is used to provide the photochromic function. For example, even if sunlight is perceived as dazzling when the photochromic element is not used, it is difficult for a viewer to determine (identify) whether the photochromic element provides any benefit (whether an anti-glare effect is achieved) (it's difficult to imagine what it would be like to have the photochromic element function when it is not used!).

[0024] <Technical Concept of the Invention> The inventors recognized the above-mentioned problem as an important technical challenge and conducted extensive research. As a result, they came up with a structure that improves convenience for viewers by making it easy to grasp the boundary (edge ​​of the light-adjusting element) between the presence and absence of a light-adjusting element in the effective area of ​​a light-transmitting element (e.g., glass). More specifically, a light-adjusting element attached to a light-transmitting element has an edge area that extends into the effective area of ​​the light-transmitting element and a sealing area that seals this edge area. By setting the thickness variation of the sealing area in the extension direction of the edge area to a predetermined range or more, a hazy unevenness is intentionally generated along the extension direction of the edge area of ​​the sealing area, and the hazy unevenness is used as an indicator for identifying the edge area in the effective area of ​​the light-transmitting element. More specifically, the sealing area has a thickness variation of 20 μm or more in the extension direction of the edge area, thereby forming an indicator (hazy unevenness) for identifying the edge area in the effective area of ​​the light-transmitting element. To make this indicator (hazy unevenness) more noticeable (highlighted), the thickness variation in the sealing region in the extension direction of the edge region is preferably 20 μm or more, and more preferably 25 μm or more.

[0025] Additionally / alternatively, the sealing region preferably has a width variation in the extension direction of the edge region of 0.5 mm or more, more preferably 0.8 mm or more, and even more preferably 1.0 mm or more. This, combined with the thickness variation requirement described above, makes the indicator (hazy unevenness) for identifying the edge region in the effective area of ​​the light-transmitting member more noticeable (highlighted).

[0026] In this way, by setting the thickness variation in the extension direction of the edge region of the sealing region that seals the edge region that extends into the effective region of the light-transmitting member to 20 μm or more (more preferably 25 μm or more) and the width variation in the extension direction of the edge region to 0.5 mm or more (preferably 0.8 mm or more, more preferably 1.0 mm or more), an indicator (hazy unevenness) for identifying the edge region in the effective region of the light-transmitting member can be generated. More specifically, by intentionally inducing scattering of incident light due to warping or wrinkles in the intermediate layer (interlayer film) at the edge sealing portion of the light-transmitting member or scattering of incident light due to variations in the edge sealing region itself during thermocompression bonding in the production of the light-transmitting member and light-control module (laminated glass), an indicator (hazy unevenness) for identifying the edge region in the effective region of the light-transmitting member can be generated.

[0027] The end region of the light adjusting component may have a first end region and a second end region, and the sealed region of the light adjusting component may have a first sealed region sealing the first end region and a second sealed region sealing the second end region. The first end region and the second end region may be located in different thickness and width directions, separated by a step. In this case, it is preferable that the width of the first sealed region sealing the first end region is 2 mm or more, and / or the width of the second sealed region sealing the second end region is 2 mm or more. It is also preferable that the sum of the width of the first sealed region sealing the first end region and the width of the second sealed region sealing the second end region is 4 mm or more. By satisfying these width conditions, the indicator (hazy unevenness) for identifying the end region in the effective region of the light-transmitting component can be increased (making it easier to see).

[0028] Furthermore, the light control module of this embodiment may have a covering portion (pattern portion) attached to the light-transmitting member and covering the edge region of the light-transmitting member, thereby visually identifying the edge region of the light-transmitting member within the effective region of the light-transmitting member. For example, consider a case in which the thickness variation in the extension direction of the edge region of the sealing region that seals the edge region that extends into the effective region of the light-transmitting member is set to 20 μm or more, thereby generating whitish, hazy irregularities as an indicator for identifying the edge region of the light-transmitting member within the effective region of the light-transmitting member. In this case, the whitish, hazy irregularities and the covering portion (pattern portion) work together to more easily identify the edge region of the light-transmitting member within the effective region of the light-transmitting member. More specifically, the background of the covering portion (pattern portion) becomes opaque with the whitish, hazy irregularities, making the covering portion (pattern portion) more noticeable. In other words, the whitish, hazy irregularities can be used as a pseudo-screen to make the covering portion (pattern portion) stand out.

[0029] In this way, it is conceivable to actively generate a whitish, hazy unevenness by adjusting parameters such as the thickness and width of the sealing region that seals the end region of the light control component, and to cooperate with the covering portion (handle portion) to make the covering portion (handle portion) more noticeable. Generally speaking, hazy unevenness in the end region of a light control component is considered undesirable because it may reduce visibility or impair aesthetics. This embodiment is based on a reversal concept not found in conventional technology: the hazy unevenness in the end region of the light control component is not simply hidden by the covering portion (handle portion), but is instead actively utilized (through a cooperative effect) to make the covering portion (handle portion) more noticeable. Of course, the end region of the light control component within the effective area of ​​the light-transmitting component may be determined by the sole effect (as an indicator) of the hazy unevenness in the end region of the light control component, without providing a covering portion (handle portion).

[0030] The covering portion (handle portion) is preferably attached to the surface of the light-transmitting member facing the end region of the light-adjusting member. That is, the covering portion (handle portion) is preferably disposed between the light-transmitting member and the light-adjusting member. This allows the covering portion (handle portion) to be attached to the light-transmitting member while being suitably protected. While it is possible to attach the covering portion to the opposite side of the light-adjusting member across the light-transmitting member, in this case, there is a risk that the covering portion will be exposed and peel off or damaged.

[0031] The edge of the covering portion (pattern portion) preferably coincides with the edge of the edge region of the light-adjusting component. This makes the covering portion (pattern portion) more visible as an indicator for identifying the edge region of the light-adjusting component in the effective region of the light-transmitting component. Furthermore, for example, if a sealed region (satisfying the condition of a thickness variation of 20 μm or more) exists in the edge region of the light-adjusting component, the whitish haze-like unevenness and the covering portion (pattern portion) work together to make the covering portion (pattern portion) more visible as an indicator for identifying the edge region of the light-adjusting component in the effective region of the light-transmitting component. More specifically, the background of the covering portion (pattern portion) becomes opaque with the whitish haze-like unevenness, making the covering portion (pattern portion) more noticeable. In other words, the whitish haze-like unevenness can be used as a pseudo-screen to make the covering portion (pattern portion) more noticeable.

[0032] The thickness of the cover (handle) is preferably 1 μm or more and 200 μm or less. This makes it easier to manufacture the cover (handle) in a way that prevents air pockets from forming. If the cover (handle) is thinner than 1 μm, it becomes difficult to manufacture, and if the cover (handle) is thicker than 200 μm, air pockets are more likely to form.

[0033] The covering portion (pattern portion) preferably has a geometric pattern (a pattern composed of figures such as circles, straight lines, and curves) such as a striped pattern or a dotted pattern, which can improve the visibility and design of the covering portion (pattern portion).

[0034] The covering portion (pattern portion) is preferably the same color as the opaque state in which the light-adjusting function of the light-adjusting component is exerted, which makes it possible to make the covering portion (pattern portion) less noticeable in the opaque state in which the light-adjusting function of the light-adjusting component is exerted (achieving a natural light-adjusting state (opaque state)).

[0035] The light control component may have multiple divided light control regions, each capable of independently controlling the light control function. In this case, the boundary between adjacent divided light control regions may be covered with a separate covering portion (pattern portion) that serves as a visual indicator for identifying the boundary. This allows the boundary between the divided light control regions to be easily identified, improving convenience for the viewer. For example, it may be easier to visualize the effect of the light control function being exerted over the entire divided light control region, the effect of the light control function being exerted over a portion of the divided light control region, and the effect of the light control function being exerted over the remaining portion of the divided light control region.

[0036] Here, a covering portion (pattern portion) that covers an end region of the light control component and is visually recognized as an indicator for identifying the end region of the light control component in the effective region of the light-transmitting component is defined as a "first covering portion (pattern portion)," and a covering portion (pattern portion) that covers a boundary portion of adjacent divided light control components and is visually recognized as an indicator for identifying the boundary portion is defined as a "second covering portion (pattern portion)." In this case, the first covering portion (pattern portion) and the second covering portion (pattern portion) may be installed in different configurations. For example, the first covering portion (pattern portion) and the second covering portion (pattern portion) may be configured with different geometric patterns so that they can be distinguished from each other. Furthermore, the priority of the first covering portion (pattern portion) may be higher than the priority of the second covering portion (pattern portion), and the first covering portion (pattern portion) may be configured with a geometric pattern that is more noticeable (emphasized) than the second covering portion (pattern portion).

[0037] The light control module of this embodiment may be applied to the windshield of an automobile to function as a sun visor. However, the application of the light control module of this embodiment is flexible, and various design modifications are possible. For example, it can be applied to any light-transmitting member such as a window of a building or vehicle.

[0038] <Specific embodiment> Fig. 1 is a plan view showing an example of the configuration of a dimming module of this embodiment. Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1. Fig. 3 is an enlarged view showing various parameters of the dimming component and dimming module of this embodiment. Fig. 2 is not a cross-sectional view taken exactly along line II-II in Fig. 1, but rather depicts two left and right boundaries (edges of the dimming component) between the presence and absence of the dimming component, with the left boundary (left edge of the dimming component) extending into the effective area of ​​the light-transmitting component and the right boundary (right edge of the dimming device) extending out of the effective area of ​​the light-transmitting component and hidden by the outer frame component.

[0039] The light control module 1 includes an outer frame member 10 having a generally rectangular frame shape with rounded corners in a plan view, and a light-transmitting member 20 supported by the outer frame member 10. The light-transmitting member 20 is a two-piece light-transmitting member composed of a first light-transmitting member 21 and a second light-transmitting member 22 facing each other. The portions of the light-transmitting member 20 (the first light-transmitting member 21 and the second light-transmitting member 22) exposed to the inside of the outer frame member 10 are defined as the "effective area of ​​the light-transmitting member 20 (the first light-transmitting member 21 and the second light-transmitting member 22)." The light-transmitting members 20 (the first light-transmitting member 21 and the second light-transmitting member 22) are made of, for example, a glass material or polycarbonate. An intermediate film (intermediate layer) 30 is provided between the first light-transmitting member 21 and the second light-transmitting member 22. The intermediate film 30 is made of a material such as PVB (polyvinyl butyral).

[0040] A light-controlling member (light-controlling sheet, light-controlling film) 40 is provided between the first light-transmitting member 21 and the second light-transmitting member 22 so as to be embedded in the intermediate film 30. The light-controlling member 40 has a light-controlling layer (liquid crystal layer) 41. The light-controlling layer 41 contains a liquid crystal composition. The light-controlling layer 41 is composed of, for example, polymer network liquid crystal (PNLC: Polymer Network Liquid Crystal), polymer dispersed liquid crystal (PDLC: Polymer Dispersed Liquid Crystal), or encapsulated nematic liquid crystal (NCAP: Nematic Curvilinear Aligned Phase). For example, a 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 41 have, for example, positive dielectric anisotropy, and the dielectric constant in the long axis direction of the liquid crystal molecules is greater than the dielectric constant in the short axis direction of the liquid crystal molecules. The liquid crystal molecules are, for example, Schiff base, azo, azoxy, biphenyl, terphenyl, benzoate, tolan, pyrimidine, cyclohexanecarboxylic acid ester, phenylcyclohexane, and dioxane liquid crystal molecules.

[0041] A transparent conductive layer (transparent electrode layer) 42X is provided on the outside of one surface (top surface in FIG. 2) of the light-controlling layer 41, and a transparent substrate layer 43X is provided on the outside of the transparent conductive layer 42X. A transparent conductive layer (transparent electrode layer) 42Y is provided on the outside of the other surface (bottom surface in FIG. 2) of the light-controlling layer 41, and a transparent substrate layer 43Y is provided on the outside of the transparent conductive layer 42Y. In this way, the light-controlling member 40 is a light-controlling sheet (light-controlling film) that has the light-controlling layer 41, a pair of transparent conductive layers 42X and 42Y located on both sides of the light-controlling layer 41, and a pair of transparent substrate layers 43X and 43Y located on both sides of the pair of transparent conductive layers 42X and 42Y.

[0042] The transparent conductive layers 42X and 42Y are transparent layers having electrical conductivity. Examples of materials that can be used to form the transparent conductive layers 42X and 42Y 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 43X and 43Y are layers that contain a material such as PET (Polyethylene Terephthalate).

[0043] Note that additional or alternative layers may be provided as "outer support layers" located outside the transparent substrate layers 43X and 43Y. In other words, the number and type of "outer support layers" are flexible, 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, and the like. Furthermore, examples of the "outer support layer" include a layer for protecting the photochromic layer 41, the transparent conductive layers 42X and 42Y, and the transparent substrate layers 43X and 43Y, a layer that contributes to controlling the light transmittance of the photochromic component 40, and a layer that enhances the strength, heat resistance, and other properties of the photochromic component 40.

[0044] The transparent conductive layer 42X and the transparent substrate layer 43X, which are located in order on the outside of one surface (top surface in Figure 2) of the dimming layer 41, and the transparent conductive layer 42Y and the transparent substrate layer 43Y, which are located in order on the outside of the other surface (bottom surface in Figure 2) of the dimming layer 41, are arranged so that their positions are offset from each other when viewed in a plane.

[0045] For example, when focusing on the left and right sides of the light-adjusting member 40, the transparent conductive layer 42Y and transparent base material layer 43Y provided on the other surface (the bottom surface in FIG. 2) of the light-adjusting layer 41 are provided with step portions DX (half-cut portions) that protrude to the left and right from the transparent conductive layer 42X and transparent base material layer 43X provided on one surface (the top surface in FIG. 2) of the light-adjusting layer 41. Electrodes (not shown) that apply a drive voltage to the light-adjusting member 40 are provided on the top surface of the transparent conductive layer 42Y located to the left and right of the step portions DX. Wiring portions (not shown), such as flexible printed circuits (FPCs), are connected to the electrodes. Although Figure 2 illustrates an example in which both sides of the transparent conductive layer 42Y and the transparent base layer 43Y protrude to the left and right beyond the transparent conductive layer 42X and the transparent base layer 43X, a configuration in which one end side of the transparent conductive layer 42Y and the transparent base layer 43Y protrudes beyond the transparent conductive layer 42X and the transparent base layer 43X, and the other short side of the transparent conductive layer 42X and the transparent base layer 43X protrudes beyond the transparent conductive layer 42Y and the transparent base layer 43Y, may also be used.

[0046] In the dimming member 40 configured as described above, when a driving current is passed through the transparent conductive layers 42X and 42Y via the electrode portion and wiring portion (not shown), a driving voltage is applied between the transparent conductive layers 42X and 42Y, i.e., to the dimming layer 41.

[0047] When no driving voltage is applied between the transparent conductive layers 42X and 42Y (the light-adjusting layer 41), the orientation of the long axes of the liquid crystal molecules in the light-adjusting layer 41 is irregular. As a result, light incident on the light-adjusting layer 41 is scattered, and the light-adjusting member 40 appears cloudy. In other words, the light-adjusting member 40 is opaque.

[0048] On the other hand, when a drive voltage is applied between the transparent conductive layers 42X and 42Y (the light-adjusting layer 41), the liquid crystal molecules in the light-adjusting layer 41 are oriented, with the long axis direction of the liquid crystal molecules oriented along the electric field direction between the transparent conductive layers 42X and 42Y. As a result, light is more easily transmitted through the light-adjusting layer 41, and the light-adjusting member 40 becomes transparent. In this way, the light-adjusting member 40 functions as a normal type (normal mode).

[0049] The light control member 40 may also include a pair of light distribution layers sandwiching the light control layer 41 between the light control layer 41 and the transparent conductive layers 42X and 42Y. The light distribution layers are layers that control the orientation of the liquid crystal molecules contained in the light control layer 41, and align the liquid crystal molecules along the normal direction of the distribution layers when no driving voltage is applied. In a configuration including the alignment layers, the light control member 40 becomes opaque when a driving voltage is applied between the transparent conductive layers 42X and 42Y (the light control layer 41), and becomes transparent when no driving voltage is applied between the transparent conductive layers 42X and 42Y (the light control layer 41) (functioning as a reverse type (reverse mode)). Examples of materials that can be used to form the alignment layers include polyamide, polyimide, polycarbonate, polystyrene, polysiloxane, polyesters such as polyethylene terephthalate and polyethylene naphthalate, and polyacrylates such as polymethyl methacrylate. The alignment treatment for forming the alignment layer is, for example, a rubbing treatment, a polarized light irradiation treatment, or a microfabrication treatment.

[0050] The light-adjusting layer 41 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-adjusting layer 41. Such a configuration achieves a light-adjusting component 40 having a predetermined color. Furthermore, by adding a dichroic dye and a black spacer to the light-adjusting component 40 (light-adjusting layer 41), it is possible to adjust the occurrence of hazy unevenness at the boundary between the presence and absence of the light-adjusting component 40 (the edge of the light-adjusting component 40).

[0051] The light-adjusting component 40 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-adjusting component 40. For example, the light-adjusting component 40 can be used in various applications, such as an instant light-adjusting crystal magic film that blocks visibility from the inside or outside only at specific times, which is normally transparent glass, office partitions, laminated glass, frosted glass, etc. The light-adjusting component 40 can also be installed in the upper region of an automobile windshield to provide a partial sun visor function.

[0052] Here, the "end region T of the light-adjusting member 40" is defined. The light-adjusting member 40 has, at its left end in FIG. 2 , a "first end region T1" consisting of the light-adjusting layer 41, the transparent conductive layer 42X, and the vicinity of the left end of the transparent substrate layer 43X, and a "second end region T2" consisting of the light-adjusting layer 41, the transparent conductive layer 42X, and the transparent conductive layer 42Y and the transparent substrate layer 43Y that protrude further to the left from the transparent substrate layer 43X. Similarly, the light-adjusting member 40 has, at its right end in FIG. 2 , a "first end region T1" consisting of the light-adjusting layer 41, the transparent conductive layer 42X, and the vicinity of the right end of the transparent substrate layer 43X, and a "second end region T2" consisting of the light-adjusting layer 41, the transparent conductive layer 42X, and the transparent conductive layer 42Y and the transparent substrate layer 43Y that protrude further to the right from the transparent substrate layer 43X. The first end region T1 and the second end region T2 are located in different thickness and width directions and are separated by a step portion DX.

[0053] 2 extends into the effective area of ​​the light-transmitting member 20 (the first light-transmitting member 21 and the second light-transmitting member 22). On the other hand, the right side end area T in FIG. 2 (the first light-transmitting member 21 and the second light-transmitting member 22) does not extend into the effective area of ​​the light-transmitting member 20 (the first light-transmitting member 21 and the second light-transmitting member 22) and is hidden by the outer frame member 10.

[0054] The end regions T (first end region T1, second end region T2) of the light adjusting component 40 are sealed by sealing regions H (first sealing region H1, second sealing region H2) made of a sealing member 50. Specifically, the sealing region H has a first sealing region H1 that seals the first end region T1 of the light adjusting component 40 and a second sealing region H2 that seals the second end region T2 of the light adjusting component 40. The sealing member 50 is made of, for example, an acrylic ultraviolet-curing resin and has a function of protecting the electrode parts and wiring parts provided on the upper surface of the transparent conductive layer 42Y and the exposed end of the light adjusting layer 41. The sealing member 50 may be transparent or a dark color such as black. In the latter case, it is possible to easily adjust the occurrence of hazy unevenness in the end regions T (first end region T1, second end region T2) of the light adjusting component 40. In this case, it is more preferable that a dichroic dye and a black spacer are added to the light adjusting layer 41.

[0055] The end region T (first end region T1, second end region T2) of the light adjusting member 40 and the sealing region H (first sealing region H1, second sealing region H2) made of the sealing member 50 extend in the extension direction (the vertical direction in FIG. 1, the direction perpendicular to the paper surface in FIG. 2) of both (both sealing members, both sealing regions). In the example of FIG. 2, the cross-sectional shape of the sealing region H made of the sealing member 50 is curved, with an apex at the connection portion (step portion DX) of the first end region T1 and the second end region T2, or at the sealed portion of the first end region T1 slightly inside the connection portion. However, the cross-sectional shape of the sealing region H made of the sealing member 50 is not limited to that shown in FIG. 2, and various design modifications are possible. For example, the cross-sectional shape of the sealing region H made of the sealing member 50 may be curved, with an apex at the sealed portion of the second end region T2, or the cross-sectional shape of the sealing region H made of the sealing member 50 may be rectangular rather than curved.

[0056] In this embodiment, the sealing region H (first sealing region H1, second sealing region H2) that seals the end region T (first end region T1, second end region T2) that extends into the effective region of the light-transmitting member 20 (first light-transmitting member 21 and second light-transmitting member 22) has a thickness variation of 20 μm or more in the extension direction of the end region and / or a width variation of 0.5 mm or more in the extension direction of the end region, thereby generating a hazy unevenness as an indicator for identifying the end region T (first end region T1, second end region T2) in the effective region of the light-transmitting member 20 (first light-transmitting member 21 and second light-transmitting member 22). In FIG. 2, the hazy unevenness (indicator) that occurs at the boundary between the presence and absence of the light-adjusting member 40 (i.e., the end of the light-adjusting member 40) is denoted by the symbol M.

[0057] In this embodiment, by setting the thickness variation in the extension direction of the sealing region H (first sealing region H1, second sealing region H2) that seals the end region T (first end region T1, second end region T2) of the dimming member 40 to 20 μm or more, more preferably 25 μm or more, the indicator (hazy unevenness M) for identifying the end region T (first end region T1, second end region T2) in the effective area of ​​the translucent member 20 (first translucent member 21 and second translucent member 22) can be made even more noticeable.

[0058] Here, the "thickness of the sealing region H (first sealing region H1, second sealing region H2)" refers to the distance (height) between the apex of the curved portion of the sealing region H (the highest apex if no curved portion is present) and the transparent base material layer 43X. That is, the "thickness of the sealing region H (first sealing region H1, second sealing region H2)" refers to the thickness (distance, height) of the sealing layer, using as a reference the surface (top surface in FIG. 2) of the transparent base material layer 43X on which the sealing region H (first sealing region H1, second sealing region H2) rests, opposite the transparent conductive layer 42X. In the example of FIG. 2, the highest point of the sealing member 50 (e.g., the apex of the curved portion) is located in the first sealing region H1, and therefore the "thickness of the sealing region H (first sealing region H1, second sealing region H2)" is defined as the distance (height) between the highest point of the sealing member 50 (e.g., the apex of the curved portion of the first sealing region H1) and the transparent base material layer 43X. On the other hand, unlike Figure 2, when the uppermost point of the sealing member 50 (e.g., the top of the curved portion) is present in the second sealing region H2, the "thickness of the sealing region H (first sealing region H1, second sealing region H2)" is defined as the distance (height) between the uppermost point of the sealing member 50 (e.g., the top of the curved portion of the second sealing region H2) and the transparent substrate layer 43X.

[0059] As described above, there is a degree of freedom in the layered structure of the light-adjusting component (light-adjusting sheet, light-adjusting film) 40, and therefore, the configuration in which the uppermost layer on one side (the upper side in FIG. 2) of the light-adjusting component 40 is a transparent substrate layer 43X (e.g., a PET layer) is merely an example. For example, if the uppermost layer on one side (the upper side in FIG. 2) of the light-adjusting component 40 is a functional layer such as a UV-cut layer, the "thickness of the sealing region H (first sealing region H1, second sealing region H2)" can be determined based on the functional layer. In summary, the "thickness of the sealing region H (first sealing region H1, second sealing region H2)" can be determined as the height from the reference surface of the light-adjusting component 40 to the raised portion of the sealing member 50 (e.g., the highest point of the sealing member 50).

[0060] Furthermore, "thickness variation in the extension direction of the sealing region H (first sealing region H1, second sealing region H2)" refers to the standard deviation σ of the thickness at each sampling point when N (N is a positive integer, for example, 10, 20, 30, etc.) sampling points are set in the extension direction of the sealing region H (first sealing region H1, second sealing region H2) (vertical direction in FIG. 1, perpendicular direction to the paper surface in FIG. 2) and the "thickness of the sealing region H (first sealing region H1, second sealing region H2)" is obtained at each sampling point. In other words, the "thickness of the sealing region H (first sealing region H1, second sealing region H2)" at any position in the extension direction of the sealing region H (first sealing region H1, second sealing region H2) (vertical direction in FIG. 1, perpendicular direction to the paper surface in FIG. 2) has a standard deviation σ of 20 μm or more.

[0061] Additionally / alternatively, by setting the width variation in the extension direction of the sealing region H (first sealing region H1, second sealing region H2) that seals the end region T (first end region T1, second end region T2) of the dimming member 40 to 0.5 mm or more, preferably 0.8 mm or more, and more preferably 1.0 mm or more, the indicator (hazy unevenness M) for identifying the end region T (first end region T1, second end region T2) in the effective area of ​​the translucent member 20 (first translucent member 21 and second translucent member 22) can be made even more noticeable.

[0062] Here, the "width of the sealing region H (first sealing region H1, second sealing region H2)" refers to the distance between the left end and the right end of the sealing region H in Fig. 2. In other words, the "width of the sealing region H (first sealing region H1, second sealing region H2)" refers to the distance between the end of the sealing region H that is farthest from the light control layer (liquid crystal layer) 41 (the left end in Fig. 2) and the end that runs up onto the transparent substrate layer 43X (the right end in Fig. 2).

[0063] Furthermore, "variation in the width of the sealing region H (first sealing region H1, second sealing region H2) in the extension direction" refers to the standard deviation σ of the width of each sampling point when N (N is a positive integer, for example, 10, 20, 30, etc.) sampling points are set in the extension direction of the sealing region H (first sealing region H1, second sealing region H2) (vertical direction in FIG. 1, perpendicular to the paper surface in FIG. 2) and the "width of the sealing region H (first sealing region H1, second sealing region H2)" is obtained at each sampling point. In other words, the "width of the sealing region H (first sealing region H1, second sealing region H2)" at any position in the extension direction of the sealing region H (first sealing region H1, second sealing region H2) (vertical direction in FIG. 1, perpendicular to the paper surface in FIG. 2) varies with a standard deviation σ of 0.5 mm or more.

[0064] 3 illustrates the thickness A of the sealing region H (here, the first sealing region H1). The thickness A of the sealing region H (here, the first sealing region H1) is defined as the distance (height) between the top of the curved portion of the sealing region H (here, the first sealing region H1) and the transparent substrate layer 43X. Here, the thickness A itself (the absolute value of the thickness A) of the sealing region H (here, the first sealing region H1) is not important; what is important is to increase the variation in the thickness A in the stretching direction (to 20 μm or more).

[0065] 3 illustrates the width B of the sealing region H (first sealing region H1, second sealing region H2). The width B of the sealing region H is the sum of the width B1 of the first sealing region H1 and the width B2 of the second sealing region H2.

[0066] The width B1 of the first sealing region H1 sealing the first end region T1 is preferably 2 mm or more. The width B2 of the second sealing region H2 sealing the second end region T2 is preferably 2 mm or more. The sum B of the width B1 of the first sealing region H1 sealing the first end region T1 and the width B2 of the second sealing region H2 sealing the second end region T2 is preferably 4 mm or more, more preferably 5 mm or more, and even more preferably 6 mm or more. By optimally setting the width B of the sealing region H (the width B1 of the first sealing region H1 and the width B2 of the second sealing region H2) so as to satisfy the above conditions, the indicator (haze-like unevenness M) for identifying the end regions T (the first end region T1 and the second end region T2) in the effective area of ​​the light-transmitting member 20 (the first light-transmitting member 21 and the second light-transmitting member 22) can be made more noticeable. Furthermore, it is preferable that the width B1 of the sealing of the first end region T1 and the width B2 of the sealing of the second end region T2 satisfy the relationship B1>B2. The first end region T1 is a region where the light-switching layer 41 and the first sealing region H1 overlap in a planar view. Therefore, the visibility of the haze-like unevenness M can be adjusted (enhanced) more than in the second sealing region H2, which does not overlap with the light-switching layer 41 in a planar view.

[0067] In FIG. 3 , the thickness of the transparent substrate layer 43X is indicated by C1, and the thickness of the transparent substrate layer 43Y is indicated by C2. The thickness C1 of the transparent substrate layer 43X and the thickness C2 of the transparent substrate layer 43Y are each preferably 50 μm or greater. When the laminated glass is produced, the transparent substrate layers 43X and 43Y are thermocompression-bonded, which tends to cause wrinkles in the transparent substrate layers 43X and 43Y. When the thicknesses C1 and C2 of the transparent substrate layers 43X and 43Y are each within the above ranges, excessive wrinkles are less likely to occur in the light control component 40 when the glass sheets are thermocompression-bonded to each other during the production of the laminated glass, and the effect of controlling the haze-like unevenness M can be further improved.

[0068] Fig. 4 is a cross-sectional view showing another embodiment of the light control module of the present embodiment, corresponding to Fig. 2. Components that overlap with those in Fig. 2 are given the same (common) reference numerals, and descriptions thereof will be omitted.

[0069] In another embodiment of FIG. 4 , a covering portion (handle portion) 60 is attached to the light-transmitting member 20 (first light-transmitting member 21, second light-transmitting member 22) and extends in the extension direction of the end region T (first end region T1, second end region T2) of the light-adjusting member 40 and the sealing region H (first sealing region H1, second sealing region H2) that seals it. More specifically, a covering portion (handle portion) 61 is attached to the top surface (the surface opposite to the light-adjusting member 40) of the first light-transmitting member 21, and a covering portion (handle portion) 62 is attached to the bottom surface (the surface on the side facing the light-adjusting member 40) of the first light-transmitting member 21. Furthermore, a covering portion (handle portion) 63 is attached to the bottom surface (the surface opposite to the light-adjusting member 40) of the second light-transmitting member 22, and a covering portion (handle portion) 64 is attached to the top surface (the surface facing the light-adjusting member 40) of the second light-transmitting member 22.

[0070] The covering portion 60 (61-64) covers the end region T (first end region T1, second end region T2) and the sealing region H (first sealing region H1, second sealing region H2) of the light-adjusting member 40. The covering portion 60 (61-64) spot-covers the left end region T (first end region T1, second end region T2) and the sealing region H (first sealing region H1, second sealing region H2) that extend into the effective region of the light-transmitting member 20 (first light-transmitting member 21 and second light-transmitting member 22), while not covering (not provided) the right end region T (first end region T1, second end region T2) and the sealing region H (first sealing region H1, second sealing region H2) that do not extend into the effective region of the light-transmitting member 20 (first light-transmitting member 21 and second light-transmitting member 22) and are hidden by the outer frame member 10.

[0071] In this way, the covering portion 60 (61-64) spot-covers the end regions T (first end region T1, second end region T2) and the sealing region H (first sealing region H1, second sealing region H2) that extend into the effective region of the light-transmitting member 20 (first light-transmitting member 21 and second light-transmitting member 22), and the covering portion 60 (61-64) is visually recognized as an indicator for grasping the end regions T (first end region T1, second end region T2) of the dimming member 40 in the effective region of the light-transmitting member 20 (first light-transmitting member 21 and second light-transmitting member 22).

[0072] The covering portions 60 (61-64) may be formed, for example, in a solid pattern of a dark color such as black, or in a geometric pattern (a pattern composed of figures such as circles, straight lines, and curves) such as a striped pattern or a dotted pattern. The width of the covering portions 60 (61-64) is preferably set to be equal to or slightly larger than the width of the end region T (first end region T1, second end region T2) and the sealing region H (first sealing region H1, second sealing region H2) of the light adjusting component 40. In this case, the ends of the covering portions 60 (61-64) preferably coincide with the ends of the end region T (first end region T1, second end region T2) of the light adjusting component 40. This minimizes the area of ​​the haze-like unevenness M and ensures the size of the light adjusting region. The thickness of the covering portions 60 (61-64) is preferably, for example, 1 μm or more and 200 μm or less.

[0073] 5A and 5B are diagrams showing an example of the effects of the indicators, i.e., the misty unevenness M and the covering portion 60, in an opaque state in which the dimming function of the dimming component 40 is exerted and in a transparent state in which the dimming function of the dimming component 40 is not exerted.

[0074] 5A and 5B, the light-adjusting member 40 is present in a portion extending in the left-right direction in the upper end region of the rectangular light-transmitting member 20 supported by the outer frame member 10, and the remaining lower region is an area where the light-adjusting member 40 is not present. Furthermore, at the boundary between the area where the light-adjusting member 40 is present and the area where it is not present (the end of the light-adjusting member 40), a covering portion 60 (61-64) is provided that covers the end region T and the sealing region H that extend into the effective region of the light-transmitting member 20 in a spot manner. Furthermore, at the boundary between the present and absent portions of the dimming component 40 (the end of the dimming component 40), the thickness variation in the extension direction of the sealing region H (first sealing region H1, second sealing region H2) that seals the end region T (first end region T1, second end region T2) of the dimming component 40 is set to 20 μm or more, and / or the width variation in the extension direction of the sealing region H (first sealing region H2, first sealing region H2) that seals the end region T (first end region T1, second end region T2) of the dimming component 40 is set to 0.5 mm or more, thereby actively generating a whitish, misty unevenness M that can cooperate favorably with the covering portion 60 (61-64). The combination of this hazy unevenness M and the covering portion 60 (61-64) forms an indicator for identifying the end region T (first end region T1, second end region T2) in the effective area of ​​the translucent member 20 (first translucent member 21 and second translucent member 22).

[0075] 5A, in the opaque state where the light control function of the light control component 40 is exerted, the misty unevenness M and the covering portion 60 (61-64) are located at the boundary between the presence and absence of the light control component 40 (the end portion of the light control component 40). In this case, the covering portion 60 (61-64) is preferably the same color as in the opaque state where the light control function of the light control component 40 is exerted. This makes it possible to make the covering portion 60 (61-64) less noticeable in the opaque state where the light control function of the light control component 40 is exerted (a natural light control state (opaque state) can be achieved).

[0076] As shown in FIG. 5B , in a transparent state in which the light-adjusting function of the light-adjusting component 40 is not exerted, the hazy unevenness M and the covering portion 60 (61-64) are visually recognized as indicators for identifying the end regions T (first end region T1, second end region T2) of the effective region of the light-transmitting component 20 (first light-adjusting component 21 and second light-transmitting component 22). For example, if the light-adjusting component 40 is currently in a transparent state in which the light-adjusting function of the light-adjusting component 40 is not exerted, but the light-adjusting component 40 is in an opaque state in which the light-adjusting function of the light-adjusting component 40 is exerted, the user can flexibly identify which parts of the effective region of the light-transmitting component 20 become opaque and which parts remain transparent. More specifically, when applied to a vehicle windshield in a transparent state in which the light-adjusting function of the light-adjusting component 40 is not exerted, the hazy unevenness M and the lines of the covering portion 60 (61-64) are visible, allowing the user to identify the region that will be hidden when the sun visor function (light-adjusting function) is activated. This allows for flexible response, such as switching the dimming function from off to on in the hope of achieving an anti-glare effect, when the sun enters the area above the hazy unevenness M within the effective area of ​​the translucent member 20 and the covering portion 60 (61-64) and causes glare.

[0077] In this way, the misty irregularities M and the covering portion 60 (61-64) exert different functions (actions and effects) in an opaque state in which the dimming function of the dimming member 40 is exerted, and a transparent state in which the dimming function of the dimming member 40 is not exerted. Furthermore, the misty irregularities M and the covering portion 60 (61-64) exert the above-mentioned different functions (actions and effects) at positions that enter the effective area of ​​the light-transmitting member 20, and are therefore components that are distinct from the outer frame member 10, which does not enter the effective area of ​​the light-transmitting member 20 (rather, which defines the effective area of ​​the light-transmitting member 20).

[0078] Although FIG. 4 illustrates an example in which four covering portions 61-64 are provided, the number of covering portions is flexible, and various design modifications are possible. FIG. 6 is a cross-sectional view corresponding to FIG. 4, showing another embodiment of the dimming module of this embodiment. In FIG. 6, the covering portions 61 and 63 provided on the surface opposite the dimming component 40 in FIG. 4 are omitted, and the covering portions 62 and 64 provided on the surface on the dimming component 40 side are left as they are. In FIGS. 4 and 6, the covering portions 62 and 64 are attached to the surface of the translucent member 20 (the first translucent member 21 and the second translucent member 22) that faces the end region T (the first end region T1 and the second end region T2) of the dimming component 40. This allows the covering portions 62 and 64 to be attached to the translucent member 20 (the first translucent member 21 and the second translucent member 22) while being suitably protected.

[0079] Furthermore, the patterns of the multiple covering portions 60 (for example, four covering portions 61-64) may be the same, or each covering portion may have a different pattern. It is preferable to provide a pattern that allows a single image to appear when viewed through each covering portion 60 (four covering portions in the case of FIG. 4 and two covering portions in the case of FIG. 6), as this improves the design.

[0080] FIG. 7 is a diagram showing yet another embodiment of the dimming module of this embodiment. In FIG. 7, the dimming component has multiple divided dimming regions, each capable of independently controlling dimming functions, in this case, first, second, and third divided dimming regions, arranged from top to bottom. The glass (translucent member) is provided with additional covering portions that cover the boundaries between adjacent divided dimming regions and are visually recognized as indicators for identifying the boundaries. In FIG. 7, examples of additional covering portions include a first-second covering portion that is visually recognized as an indicator for identifying the boundary between the first and second divided dimming regions, and a second-third covering portion that is visually recognized as an indicator for identifying the boundary between the second and third divided dimming regions. Furthermore, a main covering portion is provided that is visually recognized as an indicator for identifying the edge region of the dimming component within the effective region of the glass (translucent member).

[0081] Here, the main covering portion, the 1-2 covering portion, and the 2-3 covering portion may be arranged in different configurations. For example, the main covering portion, the 1-2 covering portion, and the 2-3 covering portion may be configured with different geometric patterns so that they can be distinguished from one another. Furthermore, for example, the priority of the main covering portion may be set higher than the priority of the 1-2 covering portion and the 2-3 covering portion, so that the main covering portion is configured with a geometric pattern that stands out (emphasizes) more than the 1-2 covering portion and the 2-3 covering portion.

[0082] 8A and 8B are diagrams corresponding to FIGS. 5A and 5B and show another embodiment of the dimming module of the present invention. In FIGS. 8A and 8B, instead of covering the entire surface of the misty unevenness M occurring in the end region T (first end region T1, second end region T2) of the dimming component 40 with the covering portion 60 (61-64) as in FIGS. 5A and 5B, the vertical center of the misty unevenness M is not covered, and the upper and lower edge sides of the misty unevenness M are covered with the covering portion 60X and the covering portion 60Y. In other words, a sandwich-structured indicator is formed in which the misty unevenness M is sandwiched between a pair of covering portions 60X and 60Y. This allows the viewer to easily grasp the boundary between the presence and absence of the light adjusting member 40 in the effective area of ​​the light-transmitting member 20 (the first light-transmitting member 21 and the second light-transmitting member 22), i.e., the end region T (the first end region T1 and the second end region T2) of the light adjusting member 40, thereby improving convenience for the viewer and design.

[0083] <Numerical examples and demonstration experiments> To demonstrate the superiority of the light control component and light control module of this embodiment, the inventors actually created samples of Numerical Examples 1-4 and Comparative Examples 1-10 and examined the visual evaluation level of misty unevenness. The samples of Numerical Examples 1-4 and Comparative Examples 1-10 each differed in at least some of the following: the film thickness (thickness) of the sealing layer (sealing region), the variation σ1 in the film thickness (thickness) of the sealing layer (sealing region) in the extension direction, the covering width (sealing width) of the first sealing region, the covering width (sealing width) of the second sealing region, the combined value of the covering width (sealing width) of the first sealing region and the covering width (sealing width) of the second sealing region, the variation σ2 in the extension direction of the covering width (sealing width) of the sealing layer (sealing region), and the film thickness (thickness) of the transparent substrate layer. Furthermore, these various parameters were examined to verify whether they satisfied the upper and lower limits specified in this embodiment. Unsatisfied portions are depicted with grayscale fills, while satisfied portions are depicted without grayscale fills. The visual evaluation level of the haze-like unevenness was confirmed by checking transmission and reflection from a position 1 m away under 1000 to 2000 lux using a three-wavelength fluorescent lamp. The visual evaluation level of the haze-like unevenness was classified into the following levels 4 to 1. Levels 4 to 3 correspond to pass levels where the object of this embodiment was achieved, and levels 2 to 1 correspond to fail levels where the object of this embodiment was not achieved. Level 4: The misty unevenness is dense, and the boundaries are very noticeable and easy to see. Level 3: The misty unevenness is fairly thick, and the boundaries are noticeable and visible. Level 2: The hazy unevenness is faint and the boundaries are not noticeable, but can be seen if you squint. Level 1: There are no hazy irregularities, and the boundaries are inconspicuous and invisible.

[0084] To fabricate the sealing layer (sealing region), a Musashi Engineering MJET-S-2 was used as the dispensing device. A UV-curable resin (acrylic UV-curable resin) was used as the sealing material. The film thickness and coating width of the sealing layer (sealing region) were controlled by the sealing material discharge pressure and driving speed of the dispensing device.

[0085] The shape of the sealing layer (sealing region) was measured as follows. The film thickness (thickness) of the sealing layer (sealing region) was measured using a high-precision contact digital sensor GT2 series amplifier unit DIN rail type NPNGT2-71N. The coating width (sealing width) of the sealing layer (sealing region) was measured using a magnifying glass. The variation σ1 in the film thickness (thickness) of the sealing layer (sealing region) in the extension direction and the variation σ2 in the coating width (sealing width) of the sealing layer (sealing region) in the extension direction were measured based on 10 measurement points (sampling points) in the extension direction. In other words, the difference between the maximum and minimum values ​​of each measurement was calculated as the film thickness variation σ1 and the coating width variation σ2.

[0086] The film thickness (thickness) of the transparent substrate layer was measured using a high-precision contact digital sensor GT2 series amplifier unit DIN rail type NPNGT2-71N.

[0087] Furthermore, the method for measuring the film thickness of the sealing layer (sealing region) may be classified according to the measurement location (periphery and electrode portion). The outer periphery may be measured using a high-precision contact digital sensor (measurement method A), and the electrode portion may be measured using a micrometer (measurement method B).

[0088] In measurement method A using a high-precision contact digital sensor, first, prepare the high-precision contact digital sensor on a smooth surface such as a glass table and turn on the power. Next, install the sensor head so that it is within the film surface and determine the zero point. More specifically, after installing the sensor head, press the PRESET button to set the display to zero (if the film is warped, straighten it out before performing this). Next, move the film so that the sensor head is aligned with the measurement point (for example, the center or top of the sealing width), and then measure the measurement point. At this time, try to keep the position of the sensor head as still as possible, and if the film is warped, straighten it out before performing the measurement.

[0089] In micrometer measurement method B, first prepare the micrometer and turn it on. If the displayed value is not zero, press the zero reset button. Next, press the lever to clamp the measurement point (for example, the center or top of the seal width) and measure the measurement point. At this time, keep the film and micrometer horizontal (parallel).

[0090] The covering width (sealing width) of the sealing layer (sealing region) may be measured using a magnifying glass. More specifically, the magnifying glass is placed on the measurement point and viewed perpendicularly to the magnifying glass. The covering width (sealing width) to be measured may be, for example, the distance from the outermost to the innermost circumference of the sealing layer (sealing region).

[0091] FIG. 9 shows the results of demonstration experiments for Numerical Examples 1-4 and Comparative Examples 1-10. As shown in FIG. 9, in Numerical Examples 1-4, the thickness variation σ1 in the extension direction of the sealing layer is 20 μm or more, and in all cases, the visual evaluation level of the misty unevenness is pass level 3 or higher, which indicates that the objective of this embodiment can be achieved. In particular, in Numerical Examples 3 and 4, the thickness variation σ1 in the extension direction of the sealing layer is 20 μm or more and the width variation σ2 is 0.5 mm or more, and the visual evaluation level of the misty unevenness is the highest evaluation level 4. On the other hand, in Comparative Examples 1-10, the thickness variation σ1 in the extension direction of the sealing layer is not 20 μm or more, and the visual evaluation level of the misty unevenness is fail level 2 or lower, which indicates that the objective of this embodiment cannot be achieved.

[0092] As described above, the light control component of this embodiment is a light control component that is attached to a light-transmitting component, and includes an edge region that extends into the active region of the light-transmitting component when attached to the light-transmitting component, and a sealing region that seals the edge region. The thickness of the sealing region varies by 20 μm or more in the direction of extension of the edge region, forming an indicator for identifying the edge region in the active region of the light-transmitting component. This makes it easy to identify the boundary between the areas where the light control component is present and the areas where it is not present in the active region of the light-transmitting component, improving convenience for the viewer.

[0093] 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]

[0094] 1 Dimming Module 10 Outer frame member 20. Light-transmitting member 21 First light-transmitting member 22 Second light-transmitting member 30 Interlayer (middle layer) 40 Light-controlling materials (light-controlling sheets, light-controlling films) 41 Dimming layer (liquid crystal layer) 42X 42Y Transparent conductive layer (transparent electrode layer) 43X 43Y Transparent base layer 50 Sealing member 60 60X 60Y 61 62 63 64 Covering part (handle part) (index) T end area T1 first end area T2 second end area H Sealing area H1 1st sealing area H2 2nd sealing area M: Haze-like unevenness (index)

Claims

1. A light control member attached to a light-transmitting member, an end region that extends into an effective region of the light-transmitting member when attached to the light-transmitting member; a sealing region that seals the end region; and the sealing region has a thickness variation of 20 μm or more in the extension direction of the edge region, thereby forming an indicator for identifying the edge region in the effective region of the light-transmitting member. A light-controlling element characterized by:

2. the sealing region has a width variation of 0.5 mm or more in the extension direction of the end region, thereby forming the indicator for identifying the end region in the effective region of the light-transmitting member. The light control member according to claim 1 .

3. the end region has a first end region and a second end region; The sealing region includes a first sealing region that seals the first end region and a second sealing region that seals the second end region. The light control member according to claim 1 .

4. The first end region and the second end region are located in different thickness and width directions and are separated by a step portion. The light control member according to claim 3 .

5. the width of the first sealing region sealing the first end region is 2 mm or more, and / or the width of the second sealing region sealing the second end region is 2 mm or more; The light control member according to claim 3 .

6. the sum of the width of the first sealing region sealing the first end region and the width of the second sealing region sealing the second end region is 4 mm or more; The light control member according to claim 3 .

7. A light-transmitting member; a light control member attached to the light-transmitting member; and The light control member is an end region extending into the effective region of the light-transmitting member; a sealing region that seals the end region; and the sealing region has a thickness variation of 20 μm or more in the extension direction of the edge region, thereby forming an indicator for identifying the edge region in the effective region of the light-transmitting member. A dimming module characterized by:

8. the sealing region has a width variation of 0.5 mm or more in the extension direction of the end region, thereby forming the indicator for identifying the end region in the effective region of the light-transmitting member. The dimming module according to claim 7 .

9. a covering portion attached to the light-transmitting member and covering the end region of the light-adjusting member, the covering portion being visually recognized as an indicator for identifying the end region of the light-adjusting member in the effective region of the light-transmitting member; The dimming module according to claim 7 .

10. The covering portion is attached to a surface of the light-transmitting member that faces the end region of the light adjusting member. The dimming module according to claim 9 .

11. An end of the covering portion coincides with an end of the end region of the light adjusting member. The dimming module according to claim 9 .

12. The thickness of the coating portion is 1 μm or more and 200 μm or less. The dimming module according to claim 9 .

13. The covering portion has a geometric pattern. The dimming module according to claim 9 .

14. The covering portion has the same color as the opaque state in which the light-adjusting function of the light-adjusting member is exerted. The dimming module according to claim 9 .

15. The light control member has a plurality of divided light control areas each capable of independently controlling a light control function, a separate covering portion covering a boundary portion of adjacent divided dimming regions among the plurality of divided dimming regions, the separate covering portion being visually recognized as an indicator for identifying the boundary portion; The dimming module according to claim 9 .

16. The dimming module is applied to the windshield of a car to function as a sun visor. The dimming module according to claim 9 .

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