Building materials, building structures and buildings

Abstract

To prevent a user from having an impression that the design of a room is spoiled by an installation of a display device.SOLUTION: A first construction material 12 constituting an upper wall that partitions inside and outside of a sunroom comprises a light transmissive inner panel 21 and light transmissive outer panel 22, and a display device 24 arranged between the inner panel 21 and the outer panel 22 for displaying images in the sunroom. A light control sheet that can change the transmittance of visible light is attached to the inner panel 21. The inner panel 21 has a plurality of regions where the transmittance of the light control sheet can be changed independently. The area includes a dimming area A1 that overlaps the display device 24 and a dimming area A2 that does not overlap the display device 24.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a building material, a building structure, and a building that are equipped with a display device that displays images in a room. [Background technology]

[0002] For example, as disclosed in Patent Documents 1 and 2, display devices that project images onto a screen are known. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-038293 [Patent Document 2] Japanese Patent Publication No. 2020-087049 Summary of the Invention [Problem to be solved by the invention]

[0004] The display device may be used to project an image onto the inner surface of a wall that divides a room. In this case, the display device is installed in the room by being placed on a support stand installed in the room or fixed to the wall that divides the room. In this case, the installed display device may be visible, giving the user the impression that the design of the room is marred. [Means for solving the problem]

[0005] The building material that solves the above problem is a building material that is applied to a wall that separates the inside and outside of a room in a building, and comprises a light-transmitting inner panel and a light-transmitting outer panel arranged at a distance from each other, and a display device that is arranged between the inner and outer panels and displays images inside the room, wherein a light-controlling sheet that can change the transmittance of visible light is attached to the inner panel, and the inner panel has multiple areas in which the transmittance of the light-controlling sheet can be changed independently, and the areas include an area that overlaps the display device and an area that does not overlap the display device.

[0006] According to the above configuration, by increasing the transmittance of the light-controlling sheet attached to the area of ​​the inner panel that does not overlap the display device, it becomes possible to take in outside light into the room through the building material. Also, by decreasing the transmittance of the light-controlling sheet attached to the area of ​​the inner panel that does not overlap the display device, the inner surface of the building material becomes a wall surface with a color tone based on the colors of the light-controlling sheet and the inner panel.

[0007] In either state, the display device can be made less visible from inside the room by lowering the transmittance of the light-controlling sheet attached to the area of ​​the inner panel that overlaps the display device. This prevents the user from feeling that the design of the room is being damaged due to the display device being visible. Furthermore, with the above configuration, the display device is housed inside the building material, allowing for more space to be used within the room.

[0008] In the above building materials, it is preferable that the outer panel is a light-transmitting panel, and that a light-controlling sheet that can change the transmittance of visible light is attached to the outer panel, and that the outer panel is switchable between a light-blocking state in which the light-controlling sheet has a low transmittance and blocks external light from entering the inner panel, and a light-transmitting state in which the light-controlling sheet has a high transmittance and allows external light to enter the inner panel.

[0009] According to the above configuration, by reducing the transmittance of the light-controlling sheet attached to the outer panel, the display device can be made difficult to see even when looking at the room from the outside. In addition, by reducing the transmittance of both the light-controlling sheets attached to the inner panel and the outer panel, the transmittance of the entire building material can be further reduced.

[0010] In the above-mentioned building material, it is preferable that one or both of the inner panel and the outer panel comprises a transparent substrate layer and an optical thin film layer laminated on the transparent substrate layer. With the above configuration, by adjusting the reflectance or transmittance of light of a desired wavelength using the optical thin-film layer, when the inner panel is viewed from inside the room, it appears as a colored, transparent inner panel having a color or pattern based on the optical thin-film layer. Similarly, when the outer panel is viewed from outside the room, it appears as a colored, transparent outer panel having a color or pattern based on the optical thin-film layer. This improves the design of the inner and outer panels. Furthermore, because the inner panel is colored and transparent, the effect of making the display device less visible when the transmittance of the light-controlling sheet attached to the area of ​​the inner panel overlapping the display device is reduced is enhanced.

[0011] A building structure that solves the above problem includes a room partitioned by a first wall formed from the above building material. In the above-mentioned building structure, it is preferable that a second wall separate from the first wall is provided to divide the room, at least a portion of the second wall is formed from a light-transmitting panel, and the panel forming the second wall is fitted with a light-controlling sheet that can change the transmittance of visible light, and the panel forming the second wall is switchable between a shading state in which the transmittance of the light-controlling sheet is low and blocks external light from entering the room, and a light-transmitting state in which the transmittance of the light-controlling sheet is high and allows external light to enter the room.

[0012] According to the above configuration, light can be let in from multiple walls, including the first and second walls, ensuring a wide lighting range for the room. Furthermore, by lowering the transmittance of the light-controlling sheet attached to the light-transmitting panel of the second wall, the inner surface of the second wall also has a color tone based on the colors of the light-controlling sheet and the light-transmitting panel. Therefore, when the shading mode is selected, it is easy to create a unified color tone for the inner surfaces of the first and second walls.

[0013] A building that solves the above problem includes the above building structure. [Effects of the Invention]

[0014] According to the present invention, it is possible to prevent the user from feeling that the design of the room is marred by the installation of the display device. [Brief explanation of the drawings]

[0015] [Figure 1] This is a perspective view of a sunroom. [Figure 2] FIG. 2 is a cross-sectional view of the first building material. [Figure 3] FIG. 2 is a cross-sectional view of the inner panel (second building material). [Figure 4] FIG. 2 is a cross-sectional view of the outer panel. [Figure 5] FIG. 2 is a development view of the first and second building materials showing the respective dimming areas. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, an embodiment in which the building material of the present invention is applied to the wall of a sunroom installed in a building will be described. Note that the transmittance and light transmittance described below refer to the transmittance of visible light and the light transmittance of visible light, respectively. Furthermore, the inside and outside refer to the inside and outside of the sunroom, respectively.

[0017] [Sunroom] As shown in Fig. 1, sunroom 10 is installed, for example, on the terrace of residential building T. Sunroom 10 is a room partitioned by transparent walls through which sunlight, i.e., external light, can enter. Therefore, sunroom 10 is used as a building structure that provides a space that gives the feeling of being outdoors while protecting from wind and rain indoors.

[0018] The sunroom 10 comprises a framework 11, a first building material 12, a floor material 13, and second building materials 14a-14d. The framework 11 is a frame member formed three-dimensionally according to the shape of the sunroom 10. The first building material 12 is a transparent panel-like member fixed to the top of the framework 11 and is the upper wall that defines the upper surface of the sunroom 10. The floor material 13 is the lower wall that forms the floor of the sunroom 10 and is fixed to the bottom of the framework 11. The second building materials 14a-14d are transparent panel-like members fixed to the side of the framework 11 and are side walls that define the side surfaces of the sunroom 10. In this embodiment, the first wall that forms the building structure is the upper wall, and the second walls are the side walls. In addition, an entrance / exit (not shown) is provided in one of the side walls.

[0019] [1st construction material] The first building material 12 is a part that constitutes the upper part of the sunroom 10, and separates the inside and outside of the sunroom 10 at the upper part.

[0020] As shown in FIG. 2 , the first building material 12 includes an inner panel 21 that forms the inner surface of the ceiling of the sunroom 10 and an outer panel 22 that forms the upper outer wall of the sunroom 10. The inner panel 21 and the outer panel 22 are arranged facing each other with a gap between them in the vertical direction, i.e., the thickness direction of the upper wall. Therefore, the first building material 12 has a double-wall structure with the inner panel 21 and the outer panel 22 that are arranged with a gap between them in the thickness direction, and a storage space S is formed between the inner panel 21 and the outer panel 22 that form the double-wall structure. The gap H between the inner panel 21 and the outer panel 22 is, for example, 10 mm or more and 200 mm or less. A spacer 23 is arranged on the peripheral edges of both the inner panel 21 and the outer panel 22. The spacer 23 is a member that maintains the gap between the inner panel 21 and the outer panel 22.

[0021] 1 and 2, a display device 24 that displays images inside the sunroom 10 is housed in one corner of the storage chamber S between the inner panel 21 and the outer panel 22. Examples of the display device 24 include a projection device that projects images onto the inner surface of the wall of the sunroom 10 as a screen, a 3D image projector that forms a floating 3D image inside the sunroom 10, and a display device equipped with a screen that displays images, such as a TFT screen or LCD screen.

[0022] As shown in Fig. 3, the inner panel 21 is a colored, transparent panel having optical transparency, and includes a transparent substrate layer 21a and an optical thin film layer 21b laminated on one or both of the inner surface and the outer surface of the transparent substrate layer 21a. Fig. 3 illustrates, as an example, a case in which the optical thin film layer 21b is laminated only on the outer surface of the transparent substrate layer 21a.

[0023] The transparent substrate layer 21a is a colorless transparent or colored transparent layer. Examples of materials that can be used to form the transparent substrate layer 21a include transparent resins such as polycarbonate resin and polymethyl methacrylate resin, and glass. From the perspective of reducing weight, it is preferable to use transparent resin. From the perspective of improving strength, it is preferable to use glass. The thickness of the transparent substrate layer 21a is not particularly limited, and is appropriately set to a thickness that ensures the desired strength and desired transparency. An example of the thickness of the transparent substrate layer 21a is 0.1 mm or more and 30 mm or less.

[0024] The optical thin film layer 21b is configured to impart a specific color tone or pattern to the inner panel 21. An example of the optical thin film layer 21b is a dielectric multilayer film in which multiple types of layers with different refractive indices are stacked. Examples of materials that constitute the layers of the dielectric multilayer film include aluminum oxide, titanium oxide, silicon oxide, and indium oxide. The number of types of layers that constitute the dielectric multilayer film is, for example, two or more, and the number of layers in the dielectric multilayer film is, for example, five or more.

[0025] The thickness and material of each layer constituting the dielectric multilayer film, as well as the number of dielectric layers, are designed according to the optical properties of the dielectric multilayer film, such as the property of generating structural color through optical interference, the property of imparting a color based on light of a specific wavelength to the inner panel 21 by relatively increasing the transmittance or reflectance of light of a specific wavelength, and the property of making the inner panel 21 function as a half mirror.

[0026] As shown in Fig. 4, the outer panel 22 is a colored, transparent panel having optical transparency, and includes a transparent substrate layer 22a and an optical thin film layer 22b laminated on one or both of the inner surface and the outer surface of the transparent substrate layer 22a. Fig. 4 illustrates, as an example, a case in which the optical thin film layer 22b is laminated only on the inner surface of the transparent substrate layer 22a.

[0027] The transparent substrate layer 22a has the same configuration as the transparent substrate layer 21a. The transparent substrate layer 22a may be the same as or different from the transparent substrate layer 21a. The optical thin film layer 22b is configured to impart a specific color tone or pattern to the outer panel 22. The optical thin film layer 22b has the same configuration as the optical thin film layer 21b. The optical thin film layer 22b may be the same as or different from the optical thin film layer 21b.

[0028] [Second building materials] The second building materials 14a to 14d are parts that make up the side walls of the sunroom 10, and separate the inside and outside of the sunroom 10 at the sides.

[0029] The second building decoration materials 14a-14d are transparent panels that are light-transmitting. The configuration of the second building decoration materials 14a-14d is the same as that of the inner panel 21. As shown in Fig. 3, the second building decoration material 14 comprises a transparent substrate layer 14e and an optical thin film layer 14f laminated on one or both of the inner surface and the outer surface of the transparent substrate layer 14e. In Fig. 3, the reference numeral of the second building decoration material 14 is shown in parentheses, and as an example, the case where the optical thin film layer 14f is laminated only on the outer surface of the transparent substrate layer 14e is illustrated.

[0030] [Light control sheet] 3 and 4, a light-controlling sheet 30 is attached to the inner surface of the inner panel 21 of the first building material 12, the outer surface of the outer panel 22, and the inner surface of the second building material 14. The light-controlling sheet 30 is configured to be able to change the transmittance.

[0031] The transmittance of the light controlling sheet 30 is changed by changing the driving voltage applied to the light controlling sheet 30. In addition to liquid crystal light controlling sheets, types of light controlling sheets 30 include electrochromic sheets. The transmittance of liquid crystal light controlling sheets is controlled by controlling the orientation of liquid crystal molecules through the application of a driving voltage. The transmittance of electrochromic sheets is controlled by controlling the charge of the electrochromic material through the application of a driving voltage. When the light controlling sheet 30 has a high transmittance, its color is colorless and transparent, or colored and transparent. When the light controlling sheet 30 has a low transmittance, its color is achromatic or chromatic.

[0032] The light controlling sheet 30 is of either a normal type or a reverse type. A normal type light controlling sheet 30 has a relatively high transmittance when the light controlling sheet 30 is energized, but has a relatively low transmittance when the light controlling sheet 30 is not energized. A reverse type light controlling sheet 30 has a relatively low transmittance when the light controlling sheet 30 is energized, but has a relatively high transmittance when the light controlling sheet 30 is not energized.

[0033] The light-controlling sheet 30 includes a first transparent electrode, a second transparent electrode, and a light-controlling layer that extend in the plane direction of the light-controlling sheet 30. The light-controlling sheet 30 is formed by laminating the first transparent electrode, the light-controlling layer, and the second transparent electrode in this order, and the light-controlling layer is sandwiched between the first transparent electrode and the second transparent electrode.

[0034] The first transparent electrode and the second transparent electrode are optically transparent. The optical transparency of the first transparent electrode allows visual recognition of objects through the light-controlling sheet 30. The optical transparency of the second transparent electrode also allows visual recognition of objects through the light-controlling sheet. Examples of materials that can be used to form each transparent electrode include any one selected from the group consisting of indium tin oxide, fluorine-doped tin oxide, tin oxide, zinc oxide, carbon nanotubes, and poly(3,4-ethylenedioxythiophene).

[0035] The light-controlling layer of the liquid crystal light-controlling sheet contains a liquid crystal composition. Examples of liquid crystal molecules contained in the liquid crystal composition include at least one selected from the group consisting of Schiff base, azo, azoxy, biphenyl, terphenyl, benzoate, tolan, pyrimidine, cyclohexanecarboxylic acid ester, phenylcyclohexane, and dioxane. The liquid crystal composition can be held in a polymer-dispersed or capsule-type configuration. The polymer-dispersed configuration holds the liquid crystal composition in numerous voids dispersed in a polymer layer. The polymer-dispersed configuration includes a polymer network configuration having a three-dimensional network-like polymer network. The polymer network configuration holds the liquid crystal composition in the network-like voids. The capsule-type configuration holds a encapsulated liquid crystal composition in a polymer layer.

[0036] The reverse-type liquid crystal light control sheet further includes an alignment film between the light control layer and the first transparent electrode, and between the light control layer and the second transparent electrode. Examples of materials that can be used to form the alignment film include organic compounds such as polyimide, polyamide, polyvinyl alcohol, and cyanide compounds, inorganic compounds such as silicone, silicon oxide, and zirconium oxide, and mixtures thereof.

[0037] The alignment film may be, for example, a vertical alignment film or a horizontal alignment film. The vertical alignment film aligns the long axis direction of the liquid crystal molecules so that it is perpendicular to the surface opposite to the surface in contact with the first transparent electrode and the surface opposite to the surface in contact with the second transparent electrode. The horizontal alignment film aligns the long axis direction of the liquid crystal molecules so that it is approximately parallel to the surface opposite to the surface in contact with the first transparent electrode and the surface opposite to the surface in contact with the second transparent electrode.

[0038] The light-controlling layer of the electrochromic sheet includes an electrochromic material and an electrolyte. The electrochromic material may be selected from organic compounds such as polyaniline derivatives, viologens, metal phthalocyanines, and phenanthroline complexes, and inorganic compounds such as tungsten trioxide and indium dioxide. The electrolyte may be a liquid electrolyte such as a lithium salt or a potassium salt, or a polymer solid electrolyte.

[0039] [Placement of light control sheet] As shown in Fig. 5, the light-controlling sheet 30 is attached to light-control areas A1 to A4, which are specific areas on the inner surface of the inner panel 21 of the first building material 12, the outer surface of the outer panel 22, and the inner surface of the second building material 14. Note that in Fig. 5, the inner panel 21 and the outer panel 22 are shown separately.

[0040] The dimming area A1 is an area of ​​one corner of the inner panel 21 that includes an area of ​​the inner panel 21 that overlaps with the display device 24. The light control area A2 is a range other than the light control area A1 on the inner panel 21. In other words, it is a range on the inner panel 21 that does not overlap with the display device 24.

[0041] The dimming area A3 is the area that covers the entire surface of the outer panel 22. The dimming area A4 is a range that covers the entire surface of each of the second building decoration materials 14a to 14d. The transmittance of each light control sheet 30 can be changed independently for each of the light control areas. For the light control area A4, one light control sheet 30 is attached to each second building material 14, and the transmittance of the light control sheet 30 can be changed independently for each second building material 14.

[0042] [Light control unit] As shown in FIG. 1, the sunroom 10 is equipped with a light control controller 31 that controls the transmittance of each light control sheet 30. The light control controller 31 is electrically connected to each first transparent electrode and each second transparent electrode of each light control sheet 30. The light control controller 31 controls the transmittance of the light control sheet 30 independently for each of the light control areas A1 to A4. Note that for the light control area A4, the light control controller 31 controls the transmittance of the light control sheet 30 independently for each second building material 14.

[0043] The light control control unit 31 switches between modes that the sunroom 10 can take based on user operation of an operation unit (not shown) such as an operation unit or remote control provided in the sunroom 10. The modes that the sunroom 10 can take are, for example, light-transmitting mode, shading mode, display mode, and free selection mode. Each of these modes has a different combination of transmittance of the light-controlling sheet 30 in the light-controlling area units of the light-controlling areas A1 to A4.

[0044] The light-transmitting mode is a mode in which external light is taken into the sunroom 10. When an operation to select the light-transmitting mode is performed, the light-adjusting control unit 31 applies a voltage to the light-adjusting sheet 30 so that the portion located in the light-adjusting area A1 becomes opaque and the portions located in the light-adjusting areas A2 to A4 become transparent.

[0045] In the light transmission mode, the light control area A1, which is the area of ​​the inner panel 21 that overlaps with the display device 24, is in a shielded state with low transmittance. At this time, the light control area A1 of the inner panel 21 appears as a wall portion with a color tone based on the colors of the inner panel 21 and the light control sheet 30 when viewed from inside the sunroom 10. The display device 24 is then hidden from users inside the sunroom 10 by the inner panel 21 and the light control sheet 30, making it difficult for the display device 24 to be seen from inside the sunroom 10.

[0046] The color tone of the inner panel 21 is not particularly limited, but if the color tone is gray, smoky, silver, or the like when viewed from inside the sunroom 10 when the light controlling sheet 30 is in a shielding state with low transmittance, the effect of making the display device 24 difficult to see is more pronounced. Also, the surface state of the inner panel 21 in the basic mode is, for example, a surface state that appears glossy or matte when the light controlling sheet 30 is in a shielding state with low transmittance.

[0047] The shading mode is a mode that significantly reduces the amount of external light that enters the sunroom 10. When an operation to select the shading mode is performed, the light control control unit 31 applies a voltage to the light controlling sheet 30 so that the light controlling areas A1 to A4 become opaque.

[0048] In the shading mode, the light-controlling regions A1 to A4 are in a shading state with low transmittance, so that when viewed from inside the sunroom 10, the inner surface of the upper wall and the inner surface of each side wall appear to be wall portions with a color tone based on the color of the inner panel 21 or the second building decoration material 14 and the light-controlling sheet 30. Therefore, the shading mode is selected, for example, when the sunroom 10 is used as a windowless room that lets in external light. Furthermore, since the shading mode makes it difficult to see inside the sunroom 10 from outside, the shading mode is also useful for protecting the privacy of the sunroom 10. For example, the color tone of the second building decoration material 14 appears gray, smoky, or silver when the light-controlling sheet 30 is in a shading state with low transmittance. Furthermore, the surface condition of the second building decoration material 14 appears glossy or matte when the light-controlling sheet 30 is in a shading state with low transmittance.

[0049] Also in the shading mode, the dimming area A1, which is the area of ​​the inner panel 21 that overlaps with the display device 24, is in a shading state with low transmittance. Therefore, similar to the lighting mode, the display device 24 is difficult to see from inside the sunroom 10.

[0050] The display mode is a mode for displaying an image from the display device 24 inside the sunroom 10. When an operation to select the display mode is performed, the light control control unit 31 applies a voltage to the light controlling sheet 30 so that the portion located in the light controlling area A1 becomes transparent and the portions located in the light controlling areas A2 to A4 become opaque.

[0051] In the display mode, the dimming area A1 on the inner panel 21 is in a display state with high transmittance. Therefore, an image from the display device 24 can be displayed inside the sunroom 10 via the dimming area A1 on the inner panel 21. At this time, the dimming areas A2 to A4 are in a light-blocking state with low transmittance. This makes the inside of the sunroom 10 dark, with no external light entering through the top and side walls, making it easier to see the image from the display device 24. In addition, the inner surface of the second building material 14, which is the dimming area A4, is in an opaque state, so it can be used as a screen to display the image from the display device 24.

[0052] The free selection mode is a mode in which the user can arbitrarily set the transmittance of the light controlling sheet 30 for each of the light controlling regions A1 to A4. In the free selection mode, the user selects a light controlling region from the light controlling regions A1 to A4 and performs a setting operation to set the transmittance of the selected light controlling region. When the user performs the operation to select the free selection mode and the setting operation, the light controlling control unit 31 applies a voltage to the light controlling sheet 30 so that the transmittance of the selected light controlling region is set.

[0053] Next, the operation and effects of this embodiment will be described. (1) The first building material 12, which constitutes the upper wall that separates the inside and outside of the sunroom 10, comprises a light-transmitting inner panel 21, a light-transmitting outer panel 22, and a display device 24 that is disposed between the inner panel 21 and the outer panel 22 and displays images inside the sunroom 10. A light-controlling sheet 30 that can change the transmittance of visible light is attached to the inner panel 21. The inner panel 21 has multiple regions in which the transmittance of the light-controlling sheet 30 can be changed independently. The regions include a light-controlling region A1 that overlaps the display device 24 and a light-controlling region A2 that does not overlap the display device 24.

[0054] According to the above configuration, by increasing the transmittance of the light-controlling sheet 30 attached to the light-controlling area A2 of the inner panel 21, it becomes possible to take in external light into the sunroom 10 through the first building material 12. In addition, by decreasing the transmittance of the light-controlling sheet 30 attached to the light-controlling area A2 of the inner panel 21, the inner surface of the first building material 12 becomes a wall surface with a color tone based on the colors of the light-controlling sheet 30 and the inner panel 21.

[0055] In either state, by lowering the transmittance of the light-controlling sheet 30 attached to the light-controlling area A1 of the inner panel 21, the display device 24 can be made difficult to see from inside the sunroom 10. This prevents the user from getting the impression that the design of the sunroom 10 has been compromised due to the display device 24 being visible. Furthermore, with the above configuration, the display device 24 is housed inside the first building decoration material 12, allowing for greater use of the space inside the sunroom 10.

[0056] (2) The outer panel 22 is a light-transmitting panel. A light-controlling sheet 30 capable of changing the transmittance of visible light is attached to the outer panel 22. The outer panel 22 can be switched between a light-blocking state in which the light-controlling sheet 30 has a low transmittance and blocks external light from entering the inner panel 21, and a light-transmitting state in which the light-controlling sheet 30 has a high transmittance and allows external light to enter the inner panel 21.

[0057] According to the above configuration, by lowering the transmittance of the light-controlling sheet 30 attached to the outer panel 22, the display device 24 can be made difficult to see even when the sunroom 10 is viewed from the outside. In addition, by lowering the transmittance of both the light-controlling sheets 30 attached to the inner panel 21 and the outer panel 22, the transmittance of the entire first building material 12 can be further reduced.

[0058] (3) The inner panel 21 and the outer panel 22 include transparent base layers 21a and 22a, and optical thin film layers 21b and 22b laminated on the transparent base layers 21a and 22a. According to the above configuration, when the inner panel 21 is viewed from inside the sunroom 10, it appears as a colored and transparent inner panel 21 having a color or pattern based on the optical thin-film layer 21b. Similarly, when the outer panel 22 is viewed from outside the sunroom 10, it appears as a colored and transparent outer panel 22 having a color or pattern based on the optical thin-film layer 22b. This improves the design of the inner panel 21 and the outer panel 22. Furthermore, because the inner panel 21 is colored and transparent, it is more effective at making it difficult to see the display device 24 from inside the sunroom 10 in the shielded state.

[0059] (4) The sunroom 10 has an upper wall formed by a first building material 12 and side walls formed by second building materials 14a-14d. The second building material 14 is formed by a light-transmitting panel. A light-controlling sheet 30 that can change the transmittance of visible light is attached to the panel that forms the second building materials 14-14d. The second building materials 14-14d can be switched between a light-blocking state in which the transmittance of the light-controlling sheet 30 is low and external light is blocked from entering the sunroom 10, and a light-transmitting state in which the transmittance of the light-controlling sheet 30 is high and external light is allowed to enter the sunroom 10.

[0060] According to the above configuration, it is possible to let in light from multiple walls, ensuring a wide lighting range in the sunroom 10. Furthermore, by lowering the transmittance of the light-controlling sheet 30 attached to the second building decoration materials 14-14d, the inner surfaces of the second building decoration materials 14-14d also become wall surfaces with a color tone based on the color of the light-controlling sheet 30 and the second building decoration materials 14-14d. Therefore, when the shading mode is selected, the inner surfaces of the first building decoration material 12 and the inner surfaces of the second building decoration materials 14-14d can have a unified color tone.

[0061] This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility. The configuration accommodated in the accommodation chamber S is not limited to the display device 24. For example, a detection device such as an infrared sensor or motion sensor may be accommodated in the accommodation chamber S, and in this case, the display device 24 and each light controlling sheet 30 may be controlled based on the detection results of the detection device. Also, a storage section may be provided in the accommodation chamber S to removably store an operating member such as a remote control for controlling the display device 24 and each light controlling sheet 30. In this case, it is preferable that the portion of the inner panel 21 that overlaps with the storage section also be part of the light controlling area A1. Also, the light control control section 31 may be accommodated in the accommodation chamber S.

[0062] There are no particular limitations on the configuration of the operating unit for controlling each light controlling sheet 30. For example, the operating unit may be provided as part of the inner surface of the inner panel 21 of the first building decoration material 12. Each light-controlling sheet 30 may be capable of changing its transmittance in only two stages: a relatively high transmittance state and a relatively low transmittance state, or may be capable of changing its transmittance in multiple stages or continuously.

[0063] The light-controlling sheet 30 may be attached to either the inner surface or the outer surface of the inner panel 21, or to both the inner surface and the outer surface. The same applies to the light-controlling sheet 30 attached to the outer panel 22 and the second building material 14.

[0064] In the above embodiment, light control areas A1 to A4 are provided as light control areas whose transmittance can be independently controlled by the light control sheet 30, but the number and arrangement of the light control areas are not limited to those in the above embodiment. For example, the light control areas A2 to A4 may be further divided into multiple light control areas.

[0065] The light controlling sheet 30 may be disposed one by one for each set light controlling area, or one light controlling sheet 30 may be disposed for two or more adjacent light controlling areas. The optical thin film layers 21b, 22b, and 14b may be omitted. Alternatively, instead of the optical thin film layers 21b, 22b, and 14b, a layer formed by laminating colored transparent resin sheets or a colored transparent resin layer formed by casting on the surface of the transparent base material layer 21a, 22a, and 14a may be provided.

[0066] The modes that the sunroom 10 can take are not limited to those described in the above embodiment, and some or all of the modes described in the above embodiment may be omitted, or other modes may be provided.

[0067] The light control sheet 30 attached to the outer panel 22 may be omitted. The first building material 12 may constitute the entire upper wall of the sunroom 10, or may constitute a part of the upper wall, for example, a window provided in a part of the upper wall.

[0068] The wall constructed from the first construction material 12 is not limited to the upper wall of the sunroom 10, but may be the side wall of the sunroom 10 or the lower wall of the sunroom 10. In addition, multiple walls in the sunroom 10 may be constructed from the first construction material 12.

[0069] The wall formed by the second building material 14 is not limited to the side wall of the sunroom 10, but may be the upper wall of the sunroom 10 or the lower wall of the sunroom 10. The rooms of the building to which the first building decoration material 12 and the second building decoration materials 14a to 14d are applied are not limited to the sunroom 10. Rooms other than the sunroom 10 include, for example, observation rooms, showrooms, event booths, wedding halls, movie theaters, and planetariums.

[0070] The room of the building to which the first building decoration material 12 is applied may be a room that does not have a wall made of the second building decoration material 14 as a dividing wall of the room. One example of the room is a room that is divided only by walls made of the first building decoration material 12. Another example of the room is a room in which, of the dividing walls of the room, the walls other than the walls made of the first building decoration material 12 are well-known walls, ceilings, or floors that are applied to general buildings.

[0071] The first and second building materials 12 and 14 are not limited to the walls of rooms in a building, but may be any components used to divide a specific room. For example, the first and second building materials 12 and 14a-14d may be window panels attached to window frames in the walls of a room, or may be partitions or other partitioning materials. Examples of the window panels include window panels that form skylights attached to the upper walls of a room. The window panels may be either openable or closed, or fixed so that they cannot be opened or closed. [Explanation of symbols]

[0072] A1~A4…Dimmer area 10...Sunroom 12…1st construction material 14a~14d…Second building materials 14a, 21a, 22a...transparent base material layer 14b,21b,22b...Optical thin film layer 21...Inner panel 22...Outer panel 24…Display device 30...Light-adjusting sheet

Claims

1. A building material applied to a wall that separates the inside and outside of a room in a building, a spaced apart light-transmitting inner panel and a light-transmitting outer panel; a display device disposed between the inner panel and the outer panel and displaying an image within the room, A light-controlling sheet capable of changing the transmittance of visible light is attached to the inner panel, The inner panel has a plurality of regions in which the transmittance of the light controlling sheet can be independently changed, The building material is characterized in that the area includes an area that overlaps with the display device and an area that does not overlap with the display device.

2. the outer panel is a light-transmitting panel; A light-controlling sheet capable of changing the transmittance of visible light is attached to the outer panel, The building material described in claim 1, wherein the outer panel is switchable between a light-blocking state in which the transmittance of the light-adjusting sheet is low and blocks external light from entering the inner panel, and a light-transmitting state in which the transmittance of the light-adjusting sheet is high and allows external light to enter the inner panel.

3. The building material according to claim 1 or 2, wherein one or both of the inner panel and the outer panel comprises a transparent substrate layer and an optical thin film layer laminated on the transparent substrate layer.

4. A building structure comprising a room partitioned by a first wall formed from the building material according to any one of claims 1 to 3.

5. a second wall that is separate from the first wall and that divides the room; At least a portion of the second wall is formed by a light-transmitting panel; a light control sheet capable of changing the transmittance of visible light is attached to a panel forming the second wall; The building structure described in claim 4, wherein the panel forming the second wall is switchable between a shading state in which the transmittance of the light-controlling sheet is low and blocks external light from entering the room, and a light-transmitting state in which the transmittance of the light-controlling sheet is high and allows external light to enter the room.

6. A building comprising the building structure according to claim 4 or claim 5.

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