WO2025005209A1 - 調光部材、合わせ板 - Google Patents
調光部材、合わせ板 Download PDFInfo
- Publication number
- WO2025005209A1 WO2025005209A1 PCT/JP2024/023443 JP2024023443W WO2025005209A1 WO 2025005209 A1 WO2025005209 A1 WO 2025005209A1 JP 2024023443 W JP2024023443 W JP 2024023443W WO 2025005209 A1 WO2025005209 A1 WO 2025005209A1
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- WO
- WIPO (PCT)
- Prior art keywords
- area
- liquid crystal
- substrate
- electrode
- crystal layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J1/00—Windows; Windscreens; Accessories therefor
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1339—Gaskets; Spacers; Sealing of cells
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
Definitions
- the present disclosure relates to a light control member and a laminate having a light control member.
- a light-adjusting component capable of adjusting visible light transmittance is known, as shown in Patent Document 1.
- the light-adjusting component shown in Patent Document 1 has, for example, a liquid crystal layer containing liquid crystal.
- a light-adjusting component having a liquid crystal layer can change the visible light transmittance by applying a voltage.
- a light-adjusting component having a liquid crystal layer has the advantage that the visible light transmittance changes quickly.
- Light-adjusting components are used, for example, in the transparent parts of partition members such as windows.
- liquid crystal molecules can become unevenly distributed.
- a light control component having a liquid crystal layer is processed under high temperature and high pressure
- the liquid crystal molecules can move in the liquid crystal layer and become unevenly distributed due to thermal expansion of the light control component and deformation due to pressure.
- the liquid crystal molecules can move in the liquid crystal layer and become unevenly distributed due to gravity.
- the unevenly distributed liquid crystal molecules are clearly visible from the outside of the light control component, and the appearance of the light control component can be marred.
- the purpose of this disclosure is to suppress uneven distribution of liquid crystal molecules in a liquid crystal layer.
- a laminate comprising a first substrate and a second substrate facing each other, and a light control member described in any one of [1] to [8] disposed between the first substrate and the second substrate.
- FIG. 1 is a perspective view of a moving body having a light adjusting member.
- FIG. 2 is a plan view showing a state in which the visible light transmittance of the light adjusting member is adjusted to be high.
- FIG. 3 is a plan view showing a state in which the visible light transmittance of the light adjusting member is adjusted to be low.
- FIG. 4 is a cross-sectional view of the light control member taken along line IV-IV in FIG.
- FIG. 5 is an enlarged plan view showing a part of the light adjusting member.
- FIG. 6 is a plan view of a modified example of the light adjusting member.
- FIG. 7 is a plan view of a modified example of the light adjusting member.
- FIG. 8 is a plan view of a modified example of the light adjusting member.
- FIG. 1 is a perspective view of a moving body having a light adjusting member.
- FIG. 2 is a plan view showing a state in which the visible light transmittance of the light adjusting
- FIG. 9 is a plan view of a modified example of the light adjusting member.
- FIG. 10 is a plan view of a modified example of the light adjusting member.
- FIG. 11 is a plan view of a modified example of the light adjusting member.
- FIG. 12 is a plan view of a modified example of the light adjusting member.
- FIG. 13 is a plan view of a modified example of the light adjusting member.
- FIG. 14 is a plan view of a modified example of the light adjusting member.
- FIG. 15 is a plan view of a modified example of the light adjusting member.
- FIG. 16 is a plan view of a modified example of the light adjusting member.
- FIG. 17 is a plan view of a modified example of the light adjusting member.
- FIG. 18 is a plan view of a modified example of the light adjusting member.
- FIG. 19 is a plan view of a modified example of the light adjusting member.
- FIG. 20 is a plan view of a modified example of the light adjusting member.
- FIG. 21 is a plan view of a modified example of the light adjusting member.
- FIG. 22 is a plan view of a modified example of the light adjusting member.
- FIG. 23 is a diagram for explaining an example of a manufacturing method of a light adjusting member.
- FIG. 24 is a diagram for explaining an example of a manufacturing method of a light adjusting member.
- FIG. 25 is a diagram for explaining an example of a manufacturing method of a light adjusting member.
- FIG. 26 is a diagram for explaining an example of a manufacturing method of a light adjusting member.
- FIG. 27 is a cross-sectional view of a substrate having a light control member.
- FIG. 28 is a plan view of a modified example of the light adjusting member.
- FIG. 29 is a cross-sectional view taken along line XXIX-XXIX in FIG.
- the normal direction of a plate-like member refers to the normal direction to the plate surface of the target plate-like member.
- plate surface refers to the surface that coincides with the target plate-like member when the target plate-like member is viewed overall and from a global perspective. The same applies when “plate” is interpreted as “film” or "sheet,” etc.
- the parameter when multiple upper limit value candidates and multiple lower limit value candidates are given for a parameter, the parameter may be a numerical range that combines any one of the upper limit value candidates and any one of the lower limit value candidates.
- the laminated plate 10 can be applied to a member for dividing a space, for example.
- the laminated plate 10 is used as a transparent portion of a partition member such as a window or windshield device of a moving body such as an automobile, train, ship, or airplane, a window in an outer wall, an inner wall, or a door of a building, or a part of a partition, or a sun visor provided on a moving body such as an automobile.
- the laminated plate 10 is used as a sunroof 5 and a side window 6 of an automobile.
- the laminated plate 10 may have any shape according to the member to which it is applied.
- the laminated plate 10 has a light control member 20 capable of adjusting the visible light transmittance.
- the sunroof 5 and the side window 6 reduce sunlight entering the inside of the automobile, and provide the passengers of the automobile with a good view.
- the laminated plate 10 may be used not only in the illustrated example but also in a sun visor, rear window, side mirror, or the like of the moving body 1.
- the moving body 1 may be a ship, a railroad vehicle, an aircraft, or the like.
- FIG. 2 is a plan view of the laminate 10 and the dimming member 20 in a state where the visible light transmittance is adjusted to be high.
- FIG. 3 is a plan view of the laminate 10 and the dimming member 20 in a state where the visible light transmittance is adjusted to be low.
- the plan view of the laminate 10 and the dimming member 20 is a view of the laminate 10 and the dimming member 20 observed from the normal direction of the plate surface.
- the laminate 10 and the dimming member 20 extend in a first direction d1 and a second direction d2.
- the first direction d1 and the second direction d2 are non-parallel directions and may be perpendicular to each other.
- the laminate 10 When the laminate 10 is used as a side window 6 or the like, it is arranged so that the second direction d2 is horizontal.
- the first direction d1 may be inclined with respect to the vertical direction, but includes a vertical component.
- the dimming member 20 extends at least in the vertical direction.
- both the first direction d1 and the second direction d2 may be horizontal.
- FIG. 4 is a cross-sectional view of the laminated plate 10 and the dimming member 20 taken along line IV-IV in FIG. 2.
- the laminated plate 10 has a first substrate 11 and a second substrate 12, a first bonding layer 13 and a second bonding layer 14, and a dimming member 20.
- the first substrate 11 and the second substrate 12 face each other.
- the plate surface of the first substrate 11 faces the plate surface of the second substrate 12.
- the dimming member 20 is disposed between the first substrate 11 and the second substrate 12.
- the first bonding layer 13 is disposed between the first substrate 11 and the dimming member 20.
- the second bonding layer 14 is disposed between the second substrate 12 and the dimming member 20.
- the first substrate 11 and the second substrate 12 preferably have a high visible light transmittance so that the visible light transmittance of the laminate 10 can be increased when the visible light transmittance of the dimming member 20 is adjusted to be high.
- the visible light transmittance of the first substrate 11 and the second substrate 12 may be 20% or more, 30% or more, 40% or more, 45% or more, 80% or more, or 85% or more.
- the first substrate 11 and the second substrate 12 are flat.
- the material of the first substrate 11 and the second substrate 12 may be, for example, soda-lime glass.
- the thickness of the first substrate 11 and the thickness of the second substrate 12 may be 1 mm or more, 2 mm or more, 3 mm or more, 3.5 mm or more, 10 mm or less, 8 mm or less, or 5 mm or less.
- the first substrate 11 and the second substrate 12 having such a thickness have excellent strength and optical properties.
- the first substrate 11 and the second substrate 12 may be made of the same material and configured in the same way, or may be different from each other in at least one of the material and the configuration. For example, the first substrate 11 and the second substrate 12 may be different from each other in thickness or visible light transmittance.
- visible light transmittance is specified as the average value of the total light transmittance at each wavelength when measured in 1 nm increments in the measurement wavelength range of 380 nm to 780 nm using a spectrophotometer (Shimadzu Corporation's "UV-3600i Plus", compliant with JIS K0115).
- the angle of incidence when measuring visible light transmittance is set to 0° unless a specific transmission direction is specified.
- the angle of incidence is the angle between the normal to the incident surface and the traveling direction of the incident light, and is less than 90°.
- the first bonding layer 13 bonds the first substrate 11 and the dimming member 20 to each other.
- the second bonding layer 14 bonds the second substrate 12 and the dimming member 20 to each other.
- the first bonding layer 13 and the second bonding layer 14 may have a high visible light transmittance so that the visible light transmittance of the laminate 10 can be high when the visible light transmittance of the dimming member 20 is adjusted to be high.
- the first bonding layer 13 and the second bonding layer 14 may have a visible light transmittance of 90% or more.
- the materials of the first bonding layer 13 and the second bonding layer 14 may have various adhesive or cohesive properties.
- the light control member 20 includes a first laminate 30, a second laminate 40, a liquid crystal layer 21, a sealant 25, and a wall portion 27.
- the liquid crystal layer 21 is disposed between the first laminate 30 and the second laminate 40.
- the sealant 25 circumferentially surrounds the liquid crystal layer 21.
- the light control member 20 may include other functional layers (not shown) intended to perform specific functions.
- the second laminate 40 includes a second electrode 43, a second substrate 41 that supports the second electrode 43, and a second alignment film 45.
- the second electrode 43 extends along the second substrate 41.
- the second electrode 43 is disposed so as to face the liquid crystal layer 21.
- the first substrate 31 and the second substrate 41 appropriately support the first electrode 33 and the second electrode 43, respectively.
- the first substrate 31 and the second substrate 41 are thin plate-like.
- the first substrate 31 and the second substrate 41 are transparent.
- the thickness of the first substrate 31 and the second substrate 41 may be 30 ⁇ m or more and 250 ⁇ m or less.
- the first substrate 31 and the second substrate 41 with such a thickness have excellent strength and optical properties.
- the material of the first substrate 31 and the second substrate 41 is, for example, glass, polyethylene terephthalate, triacetyl cellulose, polyethylene naphthalate, polycarbonate, and cycloolefin polymer.
- Transparent means that the visible light transmittance is 40% or more, 70% or more, or 80% or more.
- the first electrode 33 and the second electrode 43 are separated from each other.
- the first electrode 33 and the second electrode 43 are not directly electrically connected.
- a voltage is applied to the first electrode 33 and the second electrode 43 via wiring (not shown).
- the visible light transmittance of the dimming member 20 can be adjusted by changing the voltage applied to the first electrode 33 and the second electrode 43.
- the first electrode 33 and the second electrode 43 are transparent.
- the first electrode 33 and the second electrode 43 are, for example, a transparent conductive film made of indium tin oxide (ITO), a copper mesh, carbon nanotubes, or silver nanowires.
- ITO indium tin oxide
- the first alignment film 35 and the second alignment film 45 regulate the orientation of the liquid crystal molecules in the liquid crystal layer 21.
- the first alignment film 35 and the second alignment film 45 may be produced, for example, by performing a rubbing process on a resin layer such as polyimide, or may be produced based on a photo-alignment method in which linearly polarized ultraviolet light is irradiated onto a polymer film to selectively react polymer chains in the polarization direction, or may be produced by subjecting a fine line-shaped uneven shape produced by a rubbing process to a molding process.
- the liquid crystal layer 21 contains a plurality of liquid crystal molecules. By applying a voltage to the first electrode 33 and the second electrode 43, an electric field is formed in the liquid crystal layer 21. The electric field changes the orientation of the liquid crystal molecules.
- the orientation of the liquid crystal molecules can be changed by changing the electric field formed in the liquid crystal layer 21, in other words, by changing the voltage applied to the first electrode 33 and the second electrode 43.
- the visible light transmittance of the liquid crystal layer 21 can be changed depending on the orientation of the liquid crystal molecules.
- the liquid crystal layer 21 further contains a dichroic dye composition.
- the orientation of the liquid crystal molecules and the dichroic dye composition is regulated by the first alignment film 35 and the second alignment film 45 and is horizontally aligned when no voltage is applied to the first electrode 33 and the second electrode 43.
- the visible light transmittance of the liquid crystal layer 21 is low.
- the liquid crystal molecules and the dichroic dye composition approach a vertical direction to the first alignment film 35 and the second alignment film 45 due to the electric field.
- the visible light transmittance of the liquid crystal layer 21 is high.
- the visible light transmittance of the liquid crystal layer 21 can be changed as shown in Figures 2 and 3. Such a liquid crystal layer 21 is called normally dark.
- the liquid crystal molecules and the dichroic dye composition When no voltage is applied to the first electrode 33 and the second electrode 43, the liquid crystal molecules and the dichroic dye composition may be oriented vertically, regulated by the first alignment film 35 and the second alignment film 45, and when a voltage is applied between the first electrode 33 and the second electrode 43, the electric field may cause the liquid crystal molecules and the dichroic dye composition to be oriented closer to horizontal to the first alignment film 35 and the second alignment film 45. That is, when no voltage is applied to the first electrode 33 and the second electrode 43, the liquid crystal layer 21 may have a high visible light transmittance, and when a voltage is applied to the first electrode 33 and the second electrode 43, the visible light transmittance may be low. Such a liquid crystal layer 21 is called normally clear.
- the liquid crystal layer 21 has a low haze value when its visible light transmittance is low.
- the dimming component 20 including the liquid crystal layer 21 may have a haze value of 30% or less, or 15% or less when its visible light transmittance is low.
- Haze value is expressed as the ratio of diffuse transmittance to the total light transmittance of the object, and refers to the diffusion rate of light that passes through the object.
- Total light transmittance is the ratio of the amount of light that passes through the object to the amount of light that enters the object.
- Diffuse transmittance is the ratio of the amount of light that passes through the object in a direction other than a straight line to the amount of light that enters the object, in other words, the amount of light that is diffused and transmitted.
- Total light transmittance and diffuse transmittance are measured using a haze meter that complies with JIS K7361 (for example, NDH-7000 manufactured by Nippon Denshoku Industries Co., Ltd.).
- the thickness of the liquid crystal layer 21 may be 1 ⁇ m or more, or 20 ⁇ m or less.
- the liquid crystal layer 21 may further include a spacer (not shown).
- the spacer prevents the thickness of the liquid crystal layer 21 from becoming thin due to external pressure, etc.
- the shape of the spacer may be spherical, cylindrical, elliptical, or polygonal.
- the length of the spacer which is the diameter of the spacer when the spacer is spherical, or the height of the spacer when the spacer is cylindrical, corresponds to the thickness of the liquid crystal layer 21.
- the length of the spacer may be 1 ⁇ m or more, 3 ⁇ m or more, 20 ⁇ m or less, or 15 ⁇ m or less.
- the material of the spacer may be, for example, silica.
- the sealant 25 extends so as to surround the liquid crystal layer 21.
- the sealant 25 prevents leakage of the liquid crystal layer 21, and adheres to the first laminate 30 and the second laminate 40 to fix them together.
- the width of the sealant 25 may be 100 ⁇ m or more, or 5 mm or less.
- the material of the sealant 25 may be, for example, a thermosetting epoxy resin, a phenolic resin, a polyurethane, a melamine resin, an ultraviolet-curable acrylic resin, a urethane acrylate, an epoxy acrylate, an acrylate, a polyester acrylate, an amide-imide resin, a polysiloxane, a vinyl ester resin, or a thermo-ultraviolet-curable epoxy-acrylic resin.
- the width of the sealing material 25 means the length in the direction perpendicular to the extension direction of the sealing material 25 at each position of the sealing material 25.
- the wall portion 27 is provided in a portion surrounded by the sealant 25.
- the wall portion 27 divides the liquid crystal layer 21 into a plurality of areas A in a plan view of the light control member 20.
- the area A is defined by the plurality of walls 27 or by the wall portion 27 and the sealant 25.
- the wall portion 27 extends to define the area A.
- the area A having a regular hexagonal shape is defined by six walls 27.
- the wall portions 27 are regularly arranged in the first direction d1 and in a plurality of directions inclined from the first direction d1.
- the plurality of areas A are regularly arranged two-dimensionally in a plan view of the light control member 20.
- FIG. 5 is an enlarged plan view of a portion of the light control member 20 shown in FIG. 2.
- the width W of the wall 27 shown in FIG. 5 may be 10 ⁇ m or more, 30 ⁇ m or more, 50 ⁇ m or more, 1000 ⁇ m or less, 500 ⁇ m or less, or 400 ⁇ m or less.
- the wall 27 may be transparent or a color that easily transmits light, or may be a color such as black that reduces the visible light transmittance of the light-adjusting member 20.
- the material of the wall 27 may be, for example, a thermosetting epoxy resin or an ultraviolet-curing acrylic resin.
- the wall 27 may be integrated with the sealant 25, or may be a separate body from the sealant 25.
- the width W of the wall 27 means the length at each position of the wall 27 in a direction perpendicular to the direction in which the wall 27 extends.
- the area of the largest area among the areas A may be 13 mm2 or more, 85 mm2 or more, 2500 mm2 or less, 1500 mm2 or less, or 400 mm2 or less.
- the value obtained by dividing the area [ mm2 ] of the largest area among the areas A by the maximum length L1 [mm] of the horizontal length of the area A may be 50 or less, 30 or less, 15 or less, or 7.5 or less.
- the value obtained by dividing the area [ mm2 ] of the largest area among the areas A by the average width [ ⁇ m] of the wall portion 27 defining the area A may be 250 or less, 150 or less, 100 or less, 50 or less, 12 or less, 6 or less, 3 or less, or 0.05 or more.
- the length L2 of the projection of the line segment connecting the centers of gravity of two areas A divided by the same wall portion 27 in a direction perpendicular to the extension direction of the wall portion 27 may be 1 mm or more, 10 mm or more, 20 mm or more, 50 mm or less, or 30 mm or less.
- the shape and area of area A, the length in a particular direction, the width and extension direction of wall portion 27, etc. can be adjusted by appropriately setting the pattern for printing wall material 27A that will become wall portion 27 in the manufacturing method of light-adjusting component 20 described below.
- the width of the sealant 25, the width W of the wall 27, the area of the largest area in the area A, the value obtained by dividing the area of the largest area in the area A by the maximum horizontal length L1 of the area A, the value obtained by dividing the area of the largest area in the area A by the average width W of the wall 27 that defines the area A, and the length L2 of the projection of the line segment connecting the centers of gravity of the two areas A divided by the same wall 27 in a direction perpendicular to the extension direction of the wall 27 can be calculated by acquiring an image of the laminate 10 and the dimming component 20 in a planar view and processing the image. A specific calculation method will be described. A square measurement range of 5 cm square is specified at the center of the laminate 10 and the dimming component 20.
- the entire laminate 10 and the dimming component 20 is set as the measurement range. If the color of the wall 27 is transparent or a color that easily transmits light, the visible light transmittance of the dimming component 20 is adjusted to be the lowest. When the color of the wall portion 27 is a color such as black that reduces the visible light transmittance of the light-adjusting member 20, the visible light transmittance of the light-adjusting member 20 is adjusted to be the highest. In a state in which the lamination plate 10 and the light-adjusting member 20 in the measurement range are irradiated with white light, an image of the lamination plate 10 and the light-adjusting member 20 in the measurement range is acquired.
- the darkest part of the acquired image is set to gradation 255, the lightest part is set to gradation 0, and the density of the image is divided into gradations 0 to 255.
- a gradation threshold is set so that the sealing material 25, the wall portion 27, and the area A can be distinguished.
- gradations 0 to 127 may be set as the sealing material 25 and the wall portion 27, and gradations 128 to 255 may be set as the area A to distinguish them.
- the sealing material 25, the wall portion 27, and the area A are distinguished.
- the measurement range includes a plurality of wall portions 27 and areas A.
- the width of the sealing material 25, the width W of the wall 27, the area of the largest area in area A, the maximum horizontal length L1 of area A, and the length L2 of the projection of the line segment connecting the centers of gravity of two areas A divided by the same wall 27 in a direction perpendicular to the extension direction of the wall 27 are measured. From the measured values, the value obtained by dividing the area of the largest area in area A by the maximum horizontal length L1 of area A, and the value obtained by dividing the area of the largest area in area A by the average width W of the wall 27 that defines area A are calculated.
- each 5 cm square is identified as the measurement range, with one side 5 cm away from each side of the square.
- each value is measured and calculated in the same manner. If another measurement range cannot be identified, this measurement and calculation is omitted.
- the largest 25% and smallest 25% of the values in the five measurement ranges are excluded, and each value is averaged.
- the average value is identified as each value. For example, if 20 widths W of wall portion 27 are measured from one measurement range, and a total of 100 widths W of wall portion 27 are measured from the five measurement ranges, the largest 25 and smallest 25 of the measured widths W of wall portion 27 are excluded, and the average value of the remaining 50 is identified as the value of width W of wall portion 27.
- Area A may have any shape, not limited to the examples shown in Figures 2 and 3.
- area A may have the shapes shown in Figures 6 to 22.
- the laminate 10 and the dimming member 20 are shown in a state where the visible light transmittance is adjusted to be high.
- a rectangular area A extending in the first direction d1 and the second direction d2 is defined by a sealing material 25 and one or more walls 27.
- the length of area A extending in the second direction d2 is longer than the length of area A extending in the first direction d1.
- the walls 27 are arranged in the first direction d1. Area A is regularly arranged in the first direction d1.
- a rectangular area A extending in the first direction d1 and the second direction d2 is defined by a plurality of walls 27, or by a sealing material 25 and a plurality of walls 27.
- the length of area A extending in the second direction d2 is longer than the length of area A extending in the first direction d1.
- the walls 27 are arranged in the first direction d1 and the second direction d2.
- Area A is regularly arranged in the first direction d1 and the second direction d2.
- a square-shaped area A is defined by four walls 27, or by a sealant 25 and three walls 27.
- the walls 27 are regularly arranged in the first direction d1 and the second direction d2.
- the multiple areas A are regularly arranged two-dimensionally in a plan view of the dimming member 20.
- a diamond-shaped area A is defined by four walls 27.
- the length of area A extending in the second direction d2 is longer than the length of area A extending in the first direction d1.
- the walls 27 are regularly arranged in two directions inclined from the first direction d1.
- the multiple areas A are regularly arranged two-dimensionally in a plan view of the dimming member 20.
- a parallelogram-shaped area A is defined by four walls 27.
- the length of area A extending in the second direction d2 is longer than the length of area A extending in the first direction d1.
- the walls 27 are regularly arranged in a direction inclined from the first direction d1 and in the second direction d2.
- the multiple areas A are regularly arranged two-dimensionally in a plan view of the dimming member 20.
- an area A having a shape of a portion of a ring is defined by three or four wall portions 27.
- the wall portions 27 extend in an arc shape.
- the wall portions 27 are arranged regularly or irregularly.
- the multiple areas A are arranged regularly or irregularly two-dimensionally in a plan view of the dimming member 20.
- the liquid crystal layer 21 is divided into a plurality of areas A by the walls 27.
- the walls 27 that define the areas A suppress the movement of liquid crystal molecules beyond the walls 27.
- the movement of liquid crystal molecules throughout the entire liquid crystal layer 21 is suppressed.
- the uneven distribution of liquid crystal molecules in the liquid crystal layer 21 can be suppressed.
- the walls 27 define the areas A of the desired shape shown in Figures 2, 6 to 22, etc., and thus the light control member 20 can be given an excellent design.
- a laminated plate having a conventional light control member without walls and a laminated plate 10 having a light control member 20 of this embodiment were heated at 100°C for 2 hours with the first direction d1 being vertical. Immediately after heating, each laminated plate was observed. In the laminated plate having a conventional light control member without walls, the lower side in the vertical direction had darkened in color. This was thought to be due to deformation of the base material and liquid crystal layer caused by expansion due to heat, and the liquid crystal molecules contained in the liquid crystal layer moving due to gravity. In the laminated plate 10 having the light control member 20 of this embodiment, no discoloration was observed.
- the area of the largest area among the areas A is 2500 mm2 or less. Because the area A is not too large, uneven distribution of liquid crystal molecules in the area A is suppressed. If the light adjusting component 20 is arranged at an angle to the horizontal direction, there are too many liquid crystal molecules in the area A, which would break the wall 27 under its own weight, and the liquid crystal molecules would not move beyond the wall 27. This makes it possible to suppress uneven distribution of the liquid crystal molecules in the liquid crystal layer 21.
- the area of the largest area among the areas A is 13 mm2 or more. Since the area A is sufficiently large, the wall portion 27 is less noticeable in the area A, and the visible light transmittance of the light adjusting component 20 can be appropriately adjusted by the liquid crystal layer 21 in the area A.
- the value obtained by dividing the area [mm 2 ] of the largest area in the area A by the maximum length L1 [mm] of the horizontal length of the area A is 50 or less.
- the value obtained by dividing the area [mm 2 ] of the largest area in the area A by the maximum length L1 [mm] of the horizontal length of the area A is considered to be approximately the same as the vertical length [mm] of the area A. Since the value obtained by dividing the area [mm 2 ] of the largest area in the area A by the maximum length L1 [mm] of the horizontal length of the area A is not too large, there are few liquid crystal molecules that can move due to gravity.
- the first substrate 11 and the second substrate 12 are flat, and therefore the laminate 10 and the dimming member 20 are flat. At least one of the first substrate 11 and the second substrate 12 may be curved.
- the dimming member 20 has a shape that corresponds to the gap formed between the first substrate 11 and the second substrate 12. The dimming member 20 may also be curved.
- the dimming member 20 When the dimming member 20 is curved, differences in pressure occur at each position of the dimming member 20 due to the shape. Due to the difference in pressure, liquid crystal molecules tend to become unevenly distributed in the dimming member 20. When at least one of the first substrate 11 and the second substrate 12 is curved, the effect of suppressing uneven distribution of liquid crystal molecules in the liquid crystal layer 21 by the dimming member 20 of the above-mentioned embodiment can be particularly effectively achieved.
- the dimming member 20 was disposed between the first substrate 11 and the second substrate 12. In the laminate 10, the second substrate 12 may be omitted.
- the dimming member 20 may be used as a substrate 10A with a dimming member. As shown in FIG. 27, the substrate 10A with a dimming member includes a first substrate 11 and a dimming member 20. The dimming member 20 is supported by the first substrate 11.
- FIG. 28 is a plan view of the laminate 10 and the dimming member 20 according to a modified example of this embodiment.
- FIG. 29 is a cross-sectional view taken along the line XXIX-XXIX in FIG. 28.
- the dimming member 20 further has a support portion 29 provided in the area A.
- the support portion 29 is adhered to the first laminate 30 and the second laminate 40 to support both.
- the support portion 29 makes it difficult for the first substrate 31 and the second substrate 41 to deform.
- the liquid crystal molecules can be prevented from moving due to pressure.
- the support portion 29 prevents the liquid crystal molecules from moving in the area A.
- the support portion 29 extends more horizontally than vertically to prevent the liquid crystal molecules from moving due to gravity.
- the support portion 29 is regularly arranged.
- the support portion 29 is cross-shaped.
- the support portion 29 may have any shape. A plurality of support parts 29 may be provided in one area A.
- the material of the support parts 29 may be, for example, a thermosetting epoxy resin, a phenolic resin, a polyurethane, a melamine resin, an ultraviolet-curable acrylic resin, a urethane acrylate, an epoxy acrylate, an acrylate, a polyester acrylate, an amide-imide resin, a polysiloxane, a vinyl ester resin, or a thermal ultraviolet-curable epoxy-acrylic resin.
- the support parts 29 may be independent of the wall parts 27, or may be integral with the wall parts 27 and extend from the wall parts 27.
- light control components were prepared that differed in at least one of the area S of the area and the maximum horizontal length L1 of the area.
- the light control components of the examples and comparative examples included a first laminate, a second laminate, a liquid crystal layer, a sealant, and a wall portion.
- the wall portion defined a regular hexagonal area as shown in FIG. 2, etc.
- the wall portion defined a square-shaped area as shown in FIG. 8.
- the light control components of the examples and comparative examples were arranged to extend vertically and exposed to a 100°C environment for two hours, after which it was checked whether there was any change in appearance. Those for which no deterioration in appearance was observed were rated A, those for which only a minor deterioration in appearance was observed were rated B, and those for which deterioration in appearance was noticeable were rated C. Of those for which deterioration in appearance was only a minor deterioration, those for which deterioration in appearance was observed were further rated B1, B2, and B3, in order of decreasing degree of deterioration in appearance.
- the area S of the area, the maximum horizontal length L1 of the area, S/L1, and the results of confirmation of changes in appearance for the examples and comparative examples are shown in Table 1 below.
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Abstract
Description
Claims (12)
- 可視光透過率を調整可能な調光部材であって、
第1電極と、前記第1電極を支持する第1基材と、を有する第1積層体と、
前記第1電極から離れた第2電極と、前記第2電極を支持する第2基材と、を有する第2積層体と、
前記第1積層体と前記第2積層体との間に配置された液晶層と、
前記液晶層を周状に囲むシール材と、
当該調光部材の平面視において前記液晶層を複数の区域に分割する壁部と、を備え、
前記区域のうち面積が最大の区域の面積は、2500mm2以下である、調光部材。 - 可視光透過率を調整可能な調光部材であって、
少なくとも鉛直方向に延びるように配置されており、
第1電極と、前記第1電極を支持する第1基材と、を有する第1積層体と、
前記第1電極から離れた第2電極と、前記第2電極を支持する第2基材と、を有する第2積層体と、
前記第1積層体と前記第2積層体との間に配置された液晶層と、
前記液晶層を周状に囲むシール材と、
当該調光部材の平面視において前記液晶層を複数の区域に分割する壁部と、を備え、
前記区域のうち面積が最大の区域の面積[mm2]を当該区域の水平方向の長さのうちの最大の長さ[mm]で割った値が、50以下である、調光部材。 - 前記区域のうち面積が最大の区域の面積は、2500mm2以下である、請求項2に記載の調光部材。
- 前記区域のうち面積が最大の区域の面積は、13mm2以上である、請求項1または3に記載の調光部材。
- 前記壁部の幅は、10μm以上1000μm以下である、請求項1または2に記載の調光部材。
- 同一の前記壁部によって分割される2つの前記区域の重心を結ぶ線分の当該壁部の延びる方向に直交する方向への射影の長さは、1mm以上50mm以下である、請求項1または2に記載の調光部材。
- 前記区域のうち面積が最大の区域の面積[mm2]を当該区域を画定する前記壁部の幅[μm]の平均で割った値は、250以下である、請求項1または2に記載の調光部材。
- 前記区域に設けられた支持部をさらに備える、請求項1または2に記載の調光部材。
- 第1基板と、
前記第1基板に支持された請求項1または2に記載の調光部材と、を備える、調光部材付き基板。 - 互いに対向する第1基板及び第2基板と、
前記第1基板と前記第2基板との間に配置された請求項1または2に記載の調光部材と、を備える、合わせ板。 - 前記第1基板及び前記第2基板の少なくとも一方は、湾曲している、請求項10に記載の合わせ板。
- 前記第1基板及び前記第2基板は、平板状である、請求項10に記載の合わせ板。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202480043355.0A CN121420235A (zh) | 2023-06-28 | 2024-06-27 | 调光部件、夹层板 |
| KR1020257042823A KR20260027171A (ko) | 2023-06-28 | 2024-06-27 | 조광 부재, 합판 |
| EP24832067.3A EP4737993A1 (en) | 2023-06-28 | 2024-06-27 | Light control member and laminated plate |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2023106484A JP2025005990A (ja) | 2023-06-28 | 2023-06-28 | 調光部材、合わせ板 |
| JP2023-106484 | 2023-06-28 |
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| Publication Number | Publication Date |
|---|---|
| WO2025005209A1 true WO2025005209A1 (ja) | 2025-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/JP2024/023443 Ceased WO2025005209A1 (ja) | 2023-06-28 | 2024-06-27 | 調光部材、合わせ板 |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4737993A1 (ja) |
| JP (1) | JP2025005990A (ja) |
| KR (1) | KR20260027171A (ja) |
| CN (1) | CN121420235A (ja) |
| WO (1) | WO2025005209A1 (ja) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006350111A (ja) | 2005-06-17 | 2006-12-28 | Fuji Xerox Co Ltd | 表示媒体および表示素子、並びに表示方法 |
| JP2017072816A (ja) * | 2015-10-06 | 2017-04-13 | エルジー ディスプレイ カンパニー リミテッド | 光制御装置、それを含む透明表示装置及びその製造方法 |
| JP2023516988A (ja) * | 2020-03-05 | 2023-04-21 | イー インク コーポレイション | 視認エリアに埋め込まれた接合構造を有する光変調器 |
-
2023
- 2023-06-28 JP JP2023106484A patent/JP2025005990A/ja active Pending
-
2024
- 2024-06-27 EP EP24832067.3A patent/EP4737993A1/en active Pending
- 2024-06-27 KR KR1020257042823A patent/KR20260027171A/ko active Pending
- 2024-06-27 WO PCT/JP2024/023443 patent/WO2025005209A1/ja not_active Ceased
- 2024-06-27 CN CN202480043355.0A patent/CN121420235A/zh active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006350111A (ja) | 2005-06-17 | 2006-12-28 | Fuji Xerox Co Ltd | 表示媒体および表示素子、並びに表示方法 |
| JP2017072816A (ja) * | 2015-10-06 | 2017-04-13 | エルジー ディスプレイ カンパニー リミテッド | 光制御装置、それを含む透明表示装置及びその製造方法 |
| JP2023516988A (ja) * | 2020-03-05 | 2023-04-21 | イー インク コーポレイション | 視認エリアに埋め込まれた接合構造を有する光変調器 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2025005990A (ja) | 2025-01-17 |
| KR20260027171A (ko) | 2026-02-27 |
| CN121420235A (zh) | 2026-01-27 |
| EP4737993A1 (en) | 2026-05-06 |
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