WO2022138762A1 - 調光装置及びその製造方法、並びに液晶装置 - Google Patents
調光装置及びその製造方法、並びに液晶装置 Download PDFInfo
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- WO2022138762A1 WO2022138762A1 PCT/JP2021/047693 JP2021047693W WO2022138762A1 WO 2022138762 A1 WO2022138762 A1 WO 2022138762A1 JP 2021047693 W JP2021047693 W JP 2021047693W WO 2022138762 A1 WO2022138762 A1 WO 2022138762A1
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- liquid crystal
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Definitions
- a dimming member using a liquid crystal display which is used in combination with a translucent member such as a window and can be used for an electronic blind or the like for controlling the transmission of external light, or a dimming device using such a dimming member.
- Etc. have been proposed (see, for example, Patent Document 1).
- the present embodiment is a dimming device capable of suppressing the generation of a liquid crystal pool, which is a phenomenon in which a large amount of liquid crystal is locally present, and suppressing the phenomenon that the liquid crystal is unevenly distributed downward in the vertical direction due to gravity. And a method for manufacturing the same, and a liquid crystal display device.
- a configuration including a pair of glass plates, a liquid crystal cell arranged between the glass plates, and a bonding layer provided between each glass plate and the liquid crystal cell is used. ..
- the dimming device includes a first transparent substrate, a second transparent substrate, a dimming cell arranged between the first transparent substrate and the second transparent substrate, and the first transparent substrate.
- a first bonding layer arranged between the dimming cell and the second transparent substrate and a second bonding layer arranged between the second transparent substrate and the dimming cell, and the first bonding layer.
- the second bonding layer is a bonded body each containing a non-bonding adhesive component.
- the method for manufacturing the dimming device includes a step of preparing a second transparent substrate, a step of applying a second OCR material on the second transparent substrate, and a step of temporarily curing the second OCR material.
- a step of laminating a dimming cell on the temporarily cured second OCR material, a step of preparing a first transparent substrate, a step of applying a first OCR material on the first transparent substrate, and a step of using the first OCR material are used.
- the first OCR material is cured to form the first OCR layer
- the second OCR material is cured to form the second OCR layer. Prepared for the process.
- a first bonding layer arranged between the two transparent substrates and a second bonding layer arranged between the second transparent substrate and the liquid crystal cell are provided, and one end of the liquid crystal cell in a plan view is provided.
- the first junction in the inner region where the thickness of the first junction layer in the first end side region overlapping the above is adjacent to the first end side region and extends to the other side opposite to the one side.
- a liquid crystal display that is thicker than the layer thickness.
- This embodiment is arranged between the first transparent substrate, the second transparent substrate, the first transparent substrate, and the second transparent substrate, and is flatter than the first transparent substrate and the second transparent substrate.
- a liquid crystal cell having a small visual size and having a liquid crystal layer, a first bonding layer arranged between the first transparent substrate and the liquid crystal cell and having a larger size in plan view than the liquid crystal cell, and the first 2
- a second bonding layer arranged between the transparent substrate and the liquid crystal cell and having a larger size in a plan view than the liquid crystal cell is provided, and the first bonding layer is an OCR, and the liquid crystal device is actually mounted.
- the present embodiment is a liquid crystal display in which the amount of change V is 2.7% or more and 22.7% or less in the liquid crystal display.
- liquid crystal device capable of suppressing the occurrence of liquid crystal unevenness.
- FIG. 1 is a diagram showing a dimming device (laminated glass) 10 according to the present embodiment.
- the dimming device 10 according to the present embodiment is configured by a three-dimensional shape having a curved surface shape, and in FIG. 1, as an example, the dimming device 10 has a shape that is convex toward one surface side. Have.
- the dimming device 10 is not limited to this, and the surface shape may be, for example, a planar shape (that is, a flat plate shape), or a two-dimensional shape having a curved surface shape (for example, a part of a cylinder). It may be a constituent shape) or the like.
- the three-dimensional shape is not a simple cylindrical surface, but a curved surface that cannot be constructed only by deforming the plane without expansion and contraction.
- a three-dimensional shape is a two-dimensional shape (two-dimensional curved surface) that is bent two-dimensionally around a single axis, or a two-dimensional shape that is bent two-dimensionally with different curvatures around multiple axes parallel to each other. It is distinguished from (two-dimensional curved surface). That is, the three-dimensional shape is a shape formed by a surface that is partially or wholly bent around each of a plurality of axes inclined with respect to each other. Further, in the present specification, the plan view means a state viewed from a direction perpendicular to the main surface of the dimming device 10.
- the dimming device 10 includes a first glass plate 11, a first bonding layer 13, a dimming cell 20, a second bonding layer 14, and a second glass plate 12. And have.
- the first glass plate 11, the first bonding layer 13, the dimming cell 20, the second bonding layer 14, and the second glass plate 12 are laminated and arranged in this order.
- the first joining layer 13 directly joins the first glass plate 11 and the dimming cell 20.
- the second bonding layer 14 directly bonds the second glass plate 12 and the dimming cell 20.
- a film such as an ultraviolet (UV) cut film is used between the first bonding layer 13 and the light control cell 20 and / or between the second bonding layer 14 and the light control cell 20. May be intervened.
- UV ultraviolet
- the side surface of the dimming cell 20 or a part thereof is prevented from being exposed to the side surface of the dimming device 10, and the intrusion of moisture or the like from the side surface of the dimming device 10 is suppressed.
- the water impermeability of the dimming device 10 can be further enhanced.
- both the first bonding layer 13 and the second bonding layer 14 are made of OCA. Since the film thickness of the OCA is uniform in the plane, it is possible to suppress the phenomenon that the appearance of the dimming device 10 becomes uneven while suppressing the pressure distribution on the surface of the dimming cell 20.
- the outer peripheral film 19 may be composed of one substantially C-shaped portion 19c in a plan view.
- the substantially C-shaped portion 19c has a shape obtained by removing a part adjacent to one side of the dimming cell 20 from the square-shaped outer peripheral film 19.
- a gap S in which the outer peripheral film 19 does not exist is formed in a portion of the dimming cell 20 adjacent to one side.
- FIGS. 11 (a) and 11 (g) are cross-sectional views showing a method of manufacturing the dimming device 10 according to the present embodiment.
- the second glass plate 12 is prepared.
- the first joining is performed by irradiating the second glass plate 12, the second joining layer 14, the dimming cell 20, the first joining material 13C, and the first glass plate 11 laminated with each other with ultraviolet rays (UV).
- the material 13C is cured (FIG. 11 (g)).
- the first bonding layer 13B made of OCR is formed. In this way, a dimming device 10 in which the first glass plate 11, the first bonding layer 13B, the dimming cell 20, the second bonding layer 14, and the second glass plate 12 are laminated on each other can be obtained. ..
- the first bonding layer 13 and the second bonding layer 14 have a small difference between the elastic modulus at high temperature (for example, 90 ° C.) and the elastic modulus at room temperature (25 ° C.).
- the elastic modulus of the first bonding layer 13 and the second bonding layer 14 measured at 25 ° C. is, for example, 0.08 MPa or more and 0.28 MPa or less, preferably 0.15 MPa or more and 0.23 MPa or less. Is also good.
- the elastic modulus of the first bonding layer 13 and the second bonding layer 14 measured at 90 ° C. may be, for example, 0.08 MPa or more and 0.28 MPa or less, preferably 0.15 MPa or more and 0.23 MPa or less.
- the first bonding layer (first OCR layer) 13 is arranged between the first glass plate 11 and the dimming cell 20, and the second glass plate 12 and the dimming cell 20
- a second bonding layer (second OCR layer) 14 is arranged between the two.
- the first joining layer 13 joins the first glass plate 11 and the dimming cell 20 to each other
- the second joining layer 14 joins the second glass plate 12 and the dimming cell 20 to each other.
- the dimming device 10 is placed in a high temperature environment such as in a vehicle in midsummer, the OCR having high heat resistance does not soften, and the generation of liquid crystal pools, which is a phenomenon in which the liquid crystals of the dimming cell 20 are unevenly distributed, is suppressed. be able to.
- FIGS. 15 (a) and 15 (h) are cross-sectional views showing a first modification of the method for manufacturing the dimming device 10.
- the second glass plate 12 is prepared.
- the above-mentioned laminated body 30 is laminated on the first OCR material 13A in substantially the same manner as the above-mentioned step shown in FIG. 14 (g) (FIG. 15 (g)).
- the first OCR material 13A is directed toward the dimming cell 20 side of the laminated body 30.
- the first glass plate 11 is bonded to the dimming cell 20 of the laminated body 30 using the first OCR material 13A.
- the second OCR material 14A is temporarily cured before the dimming cell 20 is attached. Then, the dimming cell 20 is attached to the second glass plate 12 using the temporarily cured second OCR material 14A.
- the unevenness of the surface of the light control cell 20 is not transferred to the second bonding layer 14 side.
- the flatness of the second junction layer 14 can be improved, and the boundary surface between the dimming cell 20 and the second junction layer 14 (second interface S2 shown in FIG. 16) can be flattened.
- the second glass plate 12 is prepared.
- the transparent protective film 57 is laminated on the second OCR material 14A, and the protective film 57 is bonded to the second glass plate 12 by the second OCR material 14A (FIG. 17 (c)). At this time, the protective film 57 is bonded on a flat jig 56.
- a separate film such as a silicone-based release film or a non-silicone-based (fluorine-based) release film can be used.
- the liquid crystal display 101 can be applied to various technical fields in which adjustment of the light transmittance is required, and the applicable range is not particularly limited.
- the liquid crystal device 101 is, for example, dimming a window glass of a building, a showcase, an indoor transparent partition, a vehicle window (for example, a window of a front, a side, a rear, a roof, etc.), a partition board inside the vehicle, or the like. It is placed in the part to be planned. This makes it possible to control the amount of light incident on the inside of a building or vehicle, or control the amount of incident light on a predetermined area inside a building or vehicle.
- the resin curing shrinkage rate of the first bonding layer 131 may be 2.3% or less, preferably 2.0% or less.
- the resin curing shrinkage rate (%) can be determined by 1- (specific gravity of liquid resin / specific gravity of cured resin), and the specific gravity can be measured using a hydrometer.
- the resin curing shrinkage rate of the first bonding layer 131 is 2.3% or less, the influence of the curing shrinkage of the first bonding layer 131 on the liquid crystal cell 110 can be reduced. As a result, it is possible to reduce the occurrence of liquid crystal pools, which is a phenomenon in which a large amount of liquid crystal is locally present in the liquid crystal cell 110.
- the liquid crystal device 101 is used in a high temperature environment such as in a vehicle, a liquid crystal pool is generated, which is a phenomenon in which a large amount of liquid crystal is locally present in the liquid crystal cell 110 in the vicinity of the first end side region 131b. Can be reduced.
- the preferable numerical range of the layer thickness difference of the first bonding layer 131 will be described later.
- the thickness of the rectangular region located on the lower side of the first end side region 131b is thicker than that of the rectangular inner region 131a.
- the first bonding layer 131 directly bonds the first glass plate 141 and the liquid crystal cell 110.
- the second bonding layer 132 directly bonds the second glass plate 142 and the liquid crystal cell 110.
- a film such as an ultraviolet (UV) cut film may be interposed between the second glass plate 142 and the second bonding layer 132.
- the outer circumference of the third bonding layer 133 may coincide with the outer circumference of the first glass plate 141 and the second glass plate 142, or may be located outside the outer circumference of the first glass plate 141 and the second glass plate 142. good. Further, it is preferable that the inner circumference of the third bonding layer 133 coincides with the outer circumference of the liquid crystal cell 110.
- the width Wa of the third bonding layer 133 (see FIG. 19) is preferably more than 0 mm and about 1/4 or less of the glass width, respectively. Alternatively, if the side surface of the liquid crystal cell 110 or a part thereof is not exposed from the side surface of the liquid crystal device 101, the third bonding layer 133 may be omitted.
- the liquid crystal cell 110 (light control film, liquid crystal film) is a film capable of controlling the amount of transmitted light by changing the applied voltage.
- the liquid crystal cell 110 is arranged so as to be sandwiched between the first glass plate 141 and the second glass plate 142.
- the liquid crystal cell 110 has a guest-host type liquid crystal layer using a dichroic dye, and is a member that changes the amount of transmitted light by an electric field applied to the liquid crystal.
- the liquid crystal cell 110 includes a film-shaped first laminated body 112, a film-shaped second laminated body 113, and a liquid crystal layer 114 arranged between the first laminated body 112 and the second laminated body 113. There is.
- the first base material 121A and the second base material 121B are made of a transparent resin, and a flexible film can be applied.
- a transparent resin film having a small optical anisotropy and a transmittance of 80% or more at a wavelength in the visible region (380 nm or more and 800 nm or less) can be applied.
- the material of the transparent resin film include an acetyl cellulose resin such as triacetyl cellulose (TAC), a polyester resin such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN), polyethylene (PE), and polypropylene (PP).
- TAC triacetyl cellulose
- PET polyethylene terephthalate
- PEN polyethylene naphthalate
- PE polyethylene
- PP polypropylene
- the bead spacer may be formed in a rod shape such as a cylindrical shape, an elliptical pillar shape, or a polygonal pillar shape, in addition to the spherical shape.
- a colored material may be applied as necessary to adjust the color.
- the bead spacer 124 is provided on the second laminated body 113, but the present invention is not limited to this, and both the first laminated body 112 and the second laminated body 113, or the first one. It may be provided only in the laminated body 112. Further, the bead spacer 124 does not necessarily have to be provided. Further, a columnar spacer may be used instead of the bead spacer 124 or together with the bead spacer 124.
- a guest host liquid crystal composition and a dichroic dye composition can be widely applied to the liquid crystal layer 114.
- the guest host liquid crystal composition may contain a chiral agent so that when the liquid crystal material is horizontally oriented, it is oriented in a spiral shape in the thickness direction of the liquid crystal layer 114.
- an annular or frame-shaped sealing material 125 is arranged so as to surround the liquid crystal layer 114 in a plan view.
- the sealing material 125 integrally holds the first laminated body 112 and the second laminated body 113, and prevents leakage of the liquid crystal material.
- a thermosetting resin such as an epoxy resin or an acrylic resin, an ultraviolet curable resin, or the like can be applied.
- the dichroic dyes used in the guest host method are dyes that are soluble in liquid crystal and have high dichroism, such as azo-based, anthraquinone-based, quinophthalone-based, perylene-based, indigo-based, thioindigo-based, and merocyanin. Examples thereof include dichroic dyes such as system, styryl system, azomethin system, and tetrazine system.
- a flexible printed wiring board 118 is arranged to electrically connect the first transparent electrode 122A and the second transparent electrode 122B to the outside.
- the flexible printed wiring board 118 is arranged so as to be sandwiched between the first transparent electrode 122A and the second transparent electrode 122B in a region where the first transparent electrode 122A and the second transparent electrode 122B do not sandwich the liquid crystal layer 114, for example. Can be connected by.
- the flexible printed wiring board 118 may be, for example, not sandwiched between the first transparent electrode 122A and the second transparent electrode 122B.
- the second bonding layer 132 made of OCA is bonded onto the second glass plate 142.
- an OCA sheet having the second bonding layer 132 and the release film 135 is attached to the second glass plate 142, and then the release film 135 is peeled off and removed onto the second glass plate 142.
- the second bonding layer 132 is bonded to the surface.
- the second bonding layer 132 may be bonded to the entire area or a part of one side of the second glass plate 142.
- the first glass plate 141 is prepared, the first glass plate 141 is laminated on the first joining material 310, and the first glass plate 141 is placed around the liquid crystal cell 110 and the liquid crystal cell 110 by the first joining material 310. It is bonded to the second bonding layer 132 exposed to the surface (FIG. 20 (e)).
- the first bonding material 310 is OCR and is a bonding body containing a non-bonding adhesive component. Therefore, the first glass plate 141 is adhered to the liquid crystal cell 110 and the second bonding layer 132 exposed around the liquid crystal cell 110 without being pressurized (that is, under environmental pressure (usually under atmospheric pressure)). To. Further, the first glass plate 141 is adhered to the liquid crystal cell 110 and the second glass plate 142 at room temperature (for example, 10 ° C. or higher and 30 ° C. or lower).
- the OCR coating distribution of the first bonding layer 131 is adjusted so that the thickness of the first bonding layer 131 in the first end side region 131b is the thickness of the first bonding layer 131 in the inner region 131a.
- the liquid crystal device is thicker than the halfbeak. As a result, the force for suppressing the expansion of the liquid crystal cell 110 was increased, and the effect of suppressing the liquid crystal pool D1 generated by the liquid crystal collecting downward was obtained.
- the thickness of the central region 131d is not set to an appropriate thickness, and the thickness is thinner than the thickness of the central region 131d of the present embodiment. Since it has the same configuration as the liquid crystal device 101 of the above, it will be described with the same reference numerals as the liquid crystal device 101. Further, in FIG. 30, the first transparent electrode 122A, the first alignment layer 123A, the second transparent electrode 122B, the second alignment layer 123B, the bead spacer 124, and the like are not shown. Further, the direction of the arrow P2 in FIG. 30 is the direction of gravity. The vertical arrangement of the liquid crystal device is a state in which the main surface of the liquid crystal device is arranged along the direction of gravity.
- the first base material 121A is pulled in the direction in which the gap (interval) of the liquid crystal layer 114 is widened by the force of expansion as shown by the arrow P1, and the liquid crystal is further subjected to gravity in the direction of the arrow P2. Since it is attracted, the liquid crystal may be accumulated downward and the liquid crystal pool D2 may be generated.
- the liquid crystal display is suppressed by the three types of configurations shown as the configurations 1 to 3 below.
- the TMA (Thermo-mechanical Analysis) method was used to measure the coefficient of linear expansion.
- the measurement conditions are as follows. Measuring device: Rigaku Co., Ltd. Micro constant load thermal expansion system Measurement mode: Constant velocity temperature rise measurement Measurement temperature range: 25 ° C to 85 ° C Temperature rise rate: 2 ° C / min Measurement atmosphere: In nitrogen Reference: Quartz glass Load load: 0.5 g (compressive load) Number of n measurements: 1 Measurement direction: Thickness direction of the test sample
- FIG. 35 is a diagram showing the results of evaluating the generation of the liquid crystal pool D2 by changing the width Wa of the peripheral region 131e of the first bonding layer 131 and the third bonding layer 133.
- the evaluation of x (poor) is that the liquid crystal pool D2 is generated
- the evaluation of ⁇ (good) is that the liquid crystal pools D1 and D2 are not generated.
- the evaluation in FIG. 35 is an evaluation focusing on the liquid crystal pool D2 shown in FIG. 31.
- the first bonding layer 131 is made of OCR having high heat resistance
- the second bonding layer 132 is made of OCA having high heat resistance.
- the liquid crystal cell 110 has been described with an example of being a dimming cell for adjusting the light transmittance. Not limited to this, the present disclosure is suitably applicable to a liquid crystal device including a liquid crystal cell for displaying information.
- the liquid crystal display 101 has been described with an example of being square in a plan view. Not limited to this, for example, the liquid crystal display 101 may be rectangular in plan view, parallelogram, trapezoid, or the like, and the shape in plan view can be changed as appropriate.
- the first bonding layer 131 has a storage elastic modulus in a normal temperature (25 ° C.) environment and a high temperature (for example, 85 ° C.). It is preferable that the difference from the storage elastic modulus in the environment is small.
- the storage elastic modulus of the first bonding layer 131 can be measured using, for example, a DMA measuring device (dynamic viscoelasticity measuring device, for example, Rheogel-E4000 manufactured by UBM Co., Ltd.). The details of the change amount V of the storage elastic modulus of the first bonding layer 131 will be described later.
- a DMA measuring device dynamic viscoelasticity measuring device, for example, Rheogel-E4000 manufactured by UBM Co., Ltd.
- the curing shrinkage rate of the first bonding layer 131 is preferably 2.3% or less from the viewpoint of reducing liquid crystal unevenness.
- the curing shrinkage rate (%) can be determined by 1- (specific gravity of liquid resin / specific gravity of cured resin). Further, the specific gravity can be measured using a hydrometer. The details of the curing shrinkage rate of the first bonding layer 131 will be described later.
- the thickness of the first bonding layer 131 may be appropriately selected depending on the material and the like. Specifically, the thickness of the first bonding layer 131 in the region overlapping the liquid crystal cell 110 in a plan view may be 30 ⁇ m or more and 1000 ⁇ m or less. Further, the size of the first bonding layer 131 may be the same as the size of the first glass plate 141 and the second glass plate 142, and the size of the first glass plate 141 and the second glass plate 141 and the second may be larger than the size of the liquid crystal cell 110. It may be smaller than the glass plate 142.
- the second joining layer 132 is arranged between the second glass plate 142 and the liquid crystal cell 110, and is a member that joins the second glass plate 142 and the liquid crystal cell 110 to each other.
- the second bonding layer 132 has a larger size in a plan view than the liquid crystal cell 110.
- the second bonding layer 132 is composed of OCA (Optical Clear Adhesive).
- the second bonding layer 132 made of OCA has optical transparency, and further has heat resistance, moisture heat resistance, and weather resistance up to at least about 120 ° C.
- the second bonding layer 132 will be described with reference to an example composed of OCA, but the present invention is not limited to this, and the second bonding layer 132 may be configured by OCR like the first bonding layer 131.
- the first bonding layer 131 directly bonds the first glass plate 141 and the liquid crystal cell 110.
- the second bonding layer 132 directly bonds the second glass plate 142 and the liquid crystal cell 110.
- a film such as an ultraviolet (UV) cut film is interposed between the first glass plate 141 and the liquid crystal cell 110 and at least one place between the second glass plate 142 and the liquid crystal cell 110. You may.
- UV ultraviolet
- the first bonding layer 131 is arranged between the first glass plate 141 and the liquid crystal cell 110, and the second bonding layer is arranged between the second glass plate 142 and the liquid crystal cell 110.
- 132 is arranged.
- the first joining layer 131 joins the first glass plate 141 and the liquid crystal cell 110 to each other, and the second joining layer 132 joins the second glass plate 142 and the liquid crystal cell 110 to each other.
- the liquid crystal display 101 preferably does not contain a bonded body containing a pressure-sensitive adhesive component.
- the bonded body containing the pressure-sensitive adhesive component include an interlayer film made of PVB (polyvinyl butyral) resin or the like.
- the "bonded body containing a pressure-sensitive adhesive component” means a bonded body that requires pressure (that is, a pressure larger than normal pressure) in order to appropriately bond to an adjacent object. Normal pressure is environmental pressure, which is usually equal to atmospheric pressure and can be standard atmospheric pressure.
- Such an interlayer film such as PVB may be softened in a high temperature environment, and liquid crystal unevenness such as a liquid crystal pool in which the liquid crystal of the liquid crystal cell 110 is unevenly distributed may occur.
- an interlayer film such as PVB resin does not intervene between the first glass plate 141 and the liquid crystal cell 110, and between the second glass plate 142 and the liquid crystal cell 110. Therefore, it is possible to suppress the liquid crystal unevenness as described above.
- FIG. 38 is a diagram showing a method of manufacturing the liquid crystal display 101 according to the present embodiment.
- the manufacturing method is described with reference to a cross-sectional view of the liquid crystal device 101.
- the second bonding layer 132 made of OCA is bonded onto the second glass plate 142.
- an OCA sheet having the second bonding layer 132 and the release film 135 is attached to the second glass plate 142, and then the release film 135 is peeled off and removed onto the second glass plate 142.
- the second bonding layer 132 is bonded to the surface.
- the second bonding layer 132 may be bonded to the entire surface of one side of the second glass plate 142, or may be bonded to a part of the area.
- the liquid crystal cell 110 separately prepared is bonded onto the second bonding layer 132, and the liquid crystal cell 110 is bonded to the second glass plate 142 by the second bonding layer 132. do.
- the second bonding layer 132 made of OCA is a bonded body containing a non-bonding adhesive component as described above. Therefore, the liquid crystal cell 110 and the second glass plate 142 are bonded without being pressurized (that is, under environmental pressure (usually under atmospheric pressure)). Further, the second bonding layer 132 is adhered to the liquid crystal cell 110 and the second glass plate 142 at room temperature (for example, 10 ° C. or higher and 30 ° C. or lower).
- the uncured liquid first bonding material 310 is applied onto the liquid crystal cell 110.
- the first bonding material 310 becomes the first bonding layer 131 after curing, and is an OCR material containing OCR.
- This OCR material is a liquid curable adhesive layer composition containing a polymerizable compound, and is a liquid curable adhesive layer in which a base resin such as an acrylic resin, a silicone resin or a urethane resin and an additive are mixed. It may consist of a composition for use.
- the first joining material 310 is applied to the entire area or a partial area of one side of the liquid crystal cell 110 by, for example, an application nozzle 150 such as a dispenser or a slit coater.
- the first glass plate 141 is prepared, the first glass plate 141 is laminated on the first joining material 310, and the first glass plate 141 is formed by the first joining material 310. Is attached to the liquid crystal cell 110.
- the first bonding material 310 is an OCR material containing OCR as described above, and is a bonding body containing a non-bonding adhesive component. Therefore, the first glass plate 141 is adhered to the liquid crystal cell 110 without being pressurized (that is, under environmental pressure (usually under atmospheric pressure)). Further, the first glass plate 141 is adhered to the liquid crystal cell 110 and the second glass plate 142 at room temperature (for example, 10 ° C. or higher and 30 ° C. or lower).
- UV ultraviolet rays
- FIG. 39 is a diagram showing a state in which the liquid crystal device 101X of the comparative example is placed vertically and exposed to a high temperature environment.
- the vertical placement of the liquid crystal device means that the main surface of the liquid crystal device is arranged along the direction of gravity (vertical direction).
- FIG. 40 is a diagram showing the liquid crystal device 101X shown in FIG. 39 in a plan view.
- the amount V of the change from the storage elastic modulus E1 in the normal temperature (25 ° C.) environment to the storage elastic modulus E2 in the high temperature (85 ° C.) environment is 0% or more and 30% or less.
- the change amount V is more preferably 2.7% or more and 22.7% or less.
- samples 1 to 6 of the first bonding layer 131 made of OCR having different amounts of change V in the storage elastic modulus are prepared, and these are applied to the liquid crystal apparatus 101 of the present embodiment, respectively, and the liquid crystal display in a high temperature environment. The presence or absence of unevenness was evaluated.
- the measuring device and measuring conditions for the storage elastic modulus of each sample are as follows.
- Measuring device DMA measuring device (Rheogel-E4000 manufactured by UBM Co., Ltd.) Measurement conditions Compression measurement
- Initial load Automatic static load Frequency 1Hz Strain static load 0.5%
- Each sample was 10 mm ⁇ 10 mm and had a thickness of 1.0 mm or more and 2.5 mm or less. Further, a liquid crystal device 101 was prepared using each of the first bonding layers 131 of the samples 1 to 6, and the presence or absence of liquid crystal unevenness after being left in a high temperature environment for 60 minutes was visually confirmed.
- the first bonding layer 131 is formed by OCR, is liquid in an uncured state, and is cured by irradiation with ultraviolet rays (UV).
- UV ultraviolet rays
- the curing shrinkage rate at this time is larger than 2.3%, the liquid crystal cell 110 in contact with the first bonding layer 131 is pulled along with the curing shrinkage of the first bonding layer 131, so that the gap of the liquid crystal layer 114 ( The force that regulates the interval and thickness) becomes weaker, and liquid crystal unevenness occurs when curing is completed.
- the curing shrinkage rate of the first bonding layer 131 is preferably 2.3% or less.
- liquid crystal unevenness occurs is determined by placing the liquid crystal device horizontally (the main surface of the liquid crystal device is in the horizontal direction) with the first bonding layer 131 of each sample made of OCR cured by irradiating with ultraviolet rays to form a liquid crystal device. (Arranged along) and visually confirmed.
- the first bonding layer 131 is arranged between the first glass plate 141 and the liquid crystal cell 110, and the first is between the second glass plate 142 and the liquid crystal cell 110.
- Two bonding layers 132 are arranged.
- the first bonding layer 131 and the second bonding layer 132 are bonded bodies each containing a non-bonding adhesive component.
- the first bonding layer 131 is made of OCR having high heat resistance
- the second bonding layer 132 is made of OCA having high heat resistance.
Abstract
Description
以下、図1乃至図9を参照して第1の実施の形態について説明する。
図1は、本実施の形態による調光装置(合わせガラス)10を示す図である。本実施の形態による調光装置10は、その表面形状が曲面形状を有する3次元形状により構成されており、図1では、一例として、調光装置10が一方の面側に凸となる形状を有している。なお、調光装置10は、これに限らず、例えば、表面形状が平面状(すなわち、平板状)としてもよいし、その表面形状が曲面形状を有する2次元形状(例えば、円筒の一部を構成する形状)等としてもよい。ここで、3次元形状とは、単純な円筒面ではなく、平面を伸縮なしに変形させるだけでは構成できない曲面である。3次元形状は、単一の軸を中心として2次元的に曲がった2次元形状(2次元曲面)、或いは、互いに平行な複数の軸を中心として異なる曲率で2次元的に曲がった2次元形状(2次元曲面)とは区別されるものである。すなわち、3次元形状とは、互いに対して傾斜した複数の軸の各々を中心として、部分的に又は全体的に曲がっている面による形状である。また本明細書中、平面視とは、調光装置10の主たる面に対して垂直な方向から見た状態をいう。
次に、本実施の形態による調光装置10の調光セル20の製造方法について、図4(a)-(d)及び図5(a)-(c)を用いて説明する。図4(a)-(d)及び図5(a)-(c)は、本実施の形態による調光セル20の製造方法を示す断面図である。
次に、本実施の形態による調光装置10の製造方法について、図6(a)-(f)を用いて説明する。図6(a)-(f)は、本実施の形態による調光装置10の製造方法を示す断面図である。
次に、図7及び図8を参照して、本実施の形態による調光装置の各変形例について説明する。図7及び図8は、それぞれ変形例による調光装置10を示す図である。図7及び図8において、図1乃至図6に示す形態と同一部分には同一の符号を付して詳細な説明は省略する。
図7は、第1の変形例による調光装置10を示す図である。図7に示すように、第1ガラス板11と第1接合層13との間に、第3接合層47が配置されている。第3接合層47は、例えばOCR(Optical Clear Resin)から構成されていても良い。OCRは、重合性化合物を含む液状の硬化性接着層用組成物を硬化した硬化物である。具体的には、OCRは、アクリル系樹脂、シリコーン系樹脂又はウレタン系樹脂等のベース樹脂と添加剤とを混合した液状の樹脂を対象物に塗布した後、例えば紫外線(UV)等を用いて硬化したものである。このように、第1ガラス板11と第1接合層13との間に第3接合層47を介在させている。これにより、調光セル20の凹凸の影響により第1ガラス板11と第1接合層13との間を第1接合層13のみで完全に充填できない場合に、第3接合層47により、第1ガラス板11と第1接合層13との間を完全に充填できる。
図8は、第2の変形例による調光装置10を示す図である。図8に示すように、第1ガラス板11と第1接合層13との間に、第3接合層47が配置されている。また第3接合層47と第1接合層13との間に、フィルム48が配置されている。第3接合層47は、OCR(Optical Clear Resin)から構成されている。フィルム48の材料としては、上述した第1基材24及び第2基材27に用いられる材料として列挙する材料のうちのいずれかを用いても良く、このうちポリエチレンテレフタレート(PET)等の樹脂フィルムを用いることが好ましい。このように、第3接合層47と第1接合層13との間にフィルム48を介在させたことにより、第1接合層13と第3接合層47の接着性を向上させることができる。
次に、図9(a)-(d)を参照して、外周フィルム19の各変形例について説明する。図9(a)-(d)は、それぞれ外周フィルム19の変形例を示す平面図である。
次に、図10及び図11を参照して、第2の実施の形態について説明する。図10及び図11は、第2の実施の形態を示す図である。図10及び図11に示す第2の実施の形態は、主として第1接合層13BがOCRから構成されている点が異なるものであり、他の構成は上述した図1乃至図9に示す第1の実施の形態と略同一である。図10及び図11において、図1乃至図9に示す形態と同一部分には同一の符号を付して詳細な説明は省略する。
図10に示すように、本実施の形態による調光装置10は、第1ガラス板11と、第1接合層13Bと、調光セル20と、第2接合層14と、第2ガラス板12とを備えている。
次に、本実施の形態による調光装置10の製造方法について、図11(a)-(g)を用いて説明する。図11(a)-(g)は、本実施の形態による調光装置10の製造方法を示す断面図である。
次に、図12乃至図17を参照して第3の実施の形態について説明する。図12乃至図17は、第3の実施の形態を示す図である。図12乃至図17に示す第3の実施の形態は、主として、第1接合層13及び第2接合層14がそれぞれOCRから構成されている点が異なるものであり、他の構成は上述した図1乃至図11に示す実施の形態と略同一である。図12乃至図17において、図1乃至図11に示す実施の形態と同一部分には同一の符号を付して詳細な説明は省略する。
図12は、本実施の形態による調光装置10の層構成を示す断面図であり、図13は、本実施の形態による調光装置10の層構成を示す分解斜視図である。なお、本実施の形態の調光装置10は、3次元形状の表面形状を有していても良いが、図12及び図13では、理解を容易にするために、調光装置10の表面形状が平面状である場合の図を示している。
次に、本実施の形態による調光装置10の製造方法(OCR塗布方法)について、図14(a)-(h)を用いて説明する。図14(a)-(h)は、本実施の形態による調光装置10の製造方法を示す断面図である。
次に、本実施の形態による調光装置10の製造方法の第1変形例について、図15(a)-(h)を用いて説明する。図15(a)-(h)は、調光装置10の製造方法の第1変形例を示す断面図である。
次に、本実施の形態による調光装置10の製造方法の第2変形例について、図17(a)-(i)を用いて説明する。図17(a)-(i)は、調光装置10の製造方法の第2変形例を示す断面図である。
次に、図18乃至図28を参照して第4の実施の形態について説明する。図18乃至図28は、第4の実施の形態を示す図である。
次に、本実施の形態による液晶装置101の製造方法について、図20を用いて説明する。図20は、本実施の形態による液晶装置101の製造方法を示す断面図である。
以上説明した実施の形態に限定されることなく、種々の変形や変更が可能であって、それらも本実施の形態の範囲内である。
次に、図29乃至図35を参照して第5の実施の形態について説明する。図29乃至図35は、第5の実施の形態を示す図である。図29乃至図35に示す第5の実施の形態は、主として、第1接合層及び液晶層の構成が異なるものである。図29乃至図35において、図18乃至図28に示す第4の実施の形態と同一部分には同一の符号を付して詳細な説明は省略する。
液晶溜まりD1、D2等が発生する現象に対し、高温環境下で第1接合層131が熱膨張により液晶セル110を押し返す力が十分ならば、液晶セル110の形状を維持できる。この液晶セル110を押し返す力は、第1接合層131の厚さが厚くなるほど強くなる。また、液晶溜まりD1、D2等が発生する現象は、液晶セル110の液晶層114の量によっても影響を受ける。液晶セル110の液晶層114の量は、液晶層114の断面積と比例関係にあることから、液晶層114の断面積に応じて、液晶溜まりを抑制するために必要な第1接合層131の厚さは変化すると考えられる。そこで、液晶層114の断面積の異なる複数の液晶セル110毎に第1接合層131の厚さを変えて液晶溜まり発生の有無を評価した。この評価は、実際の使用状態を想定して板面が重力方向に沿うように縦方向に配置して、85℃の高温環境下に1時間曝した後の液晶溜まり発生の有無を確認した。
Y=110X-170
Y≧110X-170
また、第1接合層131に用いるOCRの線膨張係数が異なると、高温環境下で第1接合層131が熱膨張により液晶セル110を押し返す力が異なることが考えられる。そこで、第1接合層131に用いるOCRの線膨張係数が異なる複数のサンプルを用いて、高温環境下における液晶溜まり発生の有無を評価した。また、第1接合層131の層厚は、100μmと300μmとの2種類を用いた。この評価は、実際の使用状態を想定して板面が重力方向に沿うように縦方向に配置して、85℃の高温環境下に1時間曝した後の液晶溜まりの発生の有無を確認した。また、この評価に用いた液晶層114の断面積は、3.36mm2であり、第1接合層131の周縁領域131e、及び、第3接合層133の幅Waは、10mmである。
測定装置:株式会社リガク製 微小定荷重熱膨張系
測定モード:等速昇温測定
測定温度範囲:25℃~85℃
昇温速度:2℃/min
測定雰囲気:窒素中
Reference:石英ガラス
負荷荷重:0.5g(圧縮荷重)
測定n数:1
測定方向:供試試料の厚み方向
先の図30において説明したように、第1接合層131の周縁領域131eに肉厚部である第3接合層133があることが液晶溜まり発生の大きな要因である。したがって周縁領域131eにおける膨張の仕方を変えることにより、液晶溜まりの発生を制御できる可能性がある。そこで、第1接合層131の周縁領域131e、及び、第3接合層133の幅Waを変えて液晶溜まりの発生を評価した。この評価は、第1接合層131に用いるOCRの平均線膨張係数を30.6(E-5/℃)とし、第1接合層131の厚さを300μmとした他は、先の図34の評価と同様な条件で行った。
以上説明した実施の形態に限定されることなく、種々の変形や変更が可能であって、それらも本実施の形態の範囲内である。
次に、図36乃至図40を参照して第6の実施の形態について説明する。図36乃至図40は、第6の実施の形態を示す図である。図36乃至図40に示す第6の実施の形態は、主として、第1接合層の構成が異なるものである。図36乃至図40において、図18乃至図28に示す第4の実施の形態と同一部分には同一の符号を付して詳細な説明は省略する。
V=1-(E2/E1)・・・(式1)
次に、本実施の形態による液晶装置101の製造方法について、図38を用いて説明する。図38は、本実施の形態による液晶装置101の製造方法を示す図である。図38では、液晶装置101の断面図により、製造方法を説明している。
次に、常温(25℃)環境下での貯蔵弾性率E1から高温(85℃)環境下での貯蔵弾性率E2への変化量Vは、0%以上30%以下であることが好ましい理由について説明する。
測定装置:DMA測定装置(株式会社ユービーエム社製 Rheogel-E4000)
測定条件
圧縮測定
初期荷重 自動静荷重
振動数 1Hz
ひずみ 静荷重 0.5%
温度 25℃,85℃
次に、第1接合層131の硬化収縮率を規定する理由について説明する。
以上説明した実施の形態に限定されることなく、種々の変形や変更が可能であって、それらも本実施の形態の範囲内である。
Claims (21)
- 第1透明基板と、
第2透明基板と、
前記第1透明基板と前記第2透明基板との間に配置された調光セルと、
前記第1透明基板と前記調光セルとの間に配置された第1接合層と、
前記第2透明基板と前記調光セルとの間に配置された第2接合層と、を備え、
前記第1接合層と前記第2接合層とは、それぞれ非圧着性の接着成分を含有する接合体であり、
前記第1接合層は、OCRであり、前記第2接合層は、OCAである、調光装置。 - 第1透明基板と、
第2透明基板と、
前記第1透明基板と前記第2透明基板との間に配置された調光セルと、
前記第1透明基板と前記調光セルとの間に配置された第1接合層と、
前記第2透明基板と前記調光セルとの間に配置された第2接合層と、を備え、
前記第1接合層と前記第2接合層とは、それぞれ非圧着性の接着成分を含有する接合体であり、
前記第1接合層及び前記第2接合層は、それぞれOCAである、調光装置。 - 前記調光セルの周囲であって、前記第1接合層と前記第2接合層との間に、外周フィルムが配置されている、請求項1又は2に記載の調光装置。
- 前記外周フィルムは、前記調光セルの外周に対応する形状のうちの一部を除去した形状を有する、請求項3に記載の調光装置。
- 第2透明基板を準備する工程と、
前記第2透明基板上に第2接合層を貼合する工程と、
前記第2接合層上に調光セルを貼合する工程と、
前記調光セル上に第1接合材料を塗布する工程と、
前記第1接合材料上に第1透明基板を貼合する工程と、
前記第1接合材料を硬化することにより第1接合層を形成する工程と、備え、
前記第1接合層と前記第2接合層とは、それぞれ非圧着性の接着成分を含有する接合体であり、
前記第1接合層は、OCRであり、前記第2接合層は、OCAである、調光装置の製造方法。 - 第2透明基板を準備する工程と、
前記第2透明基板上に第2接合層を貼合する工程と、
前記第2接合層上に調光セルを貼合する工程と、
前記調光セル上に第1接合層を貼合する工程と、
前記第1接合層上に第1透明基板を貼合する工程と、備え、
前記第1接合層と前記第2接合層とは、それぞれ非圧着性の接着成分を含有する接合体であり、
前記第1接合層及び前記第2接合層は、それぞれOCAである、調光装置の製造方法。 - 第1透明基板と、
第2透明基板と、
前記第1透明基板と前記第2透明基板との間に配置された調光セルと、
前記第1透明基板と前記調光セルとの間に配置された第1接合層と、
前記第1透明基板と前記第2透明基板との間に配置された、平面視において前記調光セルの周囲を取り囲むように形成された額縁形状のOCR層と、を備え、
前記第1接合層は、OCRである、調光装置。 - 前記第1接合層は、前記額縁形状のOCR層と一体化されている、請求項7に記載の調光装置。
- 前記第2透明基板と前記調光セルとの間に配置された第2接合層を更に備え、
前記第2接合層は、OCAである、請求項7又は8に記載の調光装置。 - 第1透明基板と、
第2透明基板と、
前記第1透明基板と前記第2透明基板との間に配置された液晶セルと、
前記第1透明基板と前記液晶セルとの間に配置された第1接合層と、
前記第2透明基板と前記液晶セルとの間に配置された第2接合層と、
を備え、
縦に配置する使用状態において、前記液晶セルの鉛直方向下側の端部に重なる第1端部側領域における前記第1接合層の層厚が、前記第1端部側領域に隣接し、鉛直方向上側に延びる内側領域における前記第1接合層の層厚よりも厚い、液晶装置。 - 請求項10に記載の液晶装置において、
前記第1接合層の層厚は、前記液晶セルの前記鉛直方向下側の端部に重なる位置において最も厚い、液晶装置。 - 請求項10又は請求項11に記載の液晶装置において、
前記内側領域に隣接し、前記鉛直方向上側に延びる第2端部側領域における前記第1接合層の層厚が、前記内側領域における前記第1接合層の層厚よりも厚い、液晶装置。 - 第1透明基板と、
第2透明基板と、
前記第1透明基板と前記第2透明基板との間に配置された液晶セルと、
前記第1透明基板と前記液晶セルとの間に配置された第1接合層と、
前記第2透明基板と前記液晶セルとの間に配置された第2接合層と、
を備え、
平面視で前記液晶セルの一方の側の端部に重なる第1端部側領域における前記第1接合層の層厚が、前記第1端部側領域に隣接し、前記一方の側とは反対の他方の側に延びる内側領域における前記第1接合層の層厚よりも厚く、
前記第1接合層がOCRであり、
前記第2接合層がOCR又はOCAである、液晶装置。 - 請求項10から請求項13までのいずれかに記載の液晶装置において、
前記第1端部側領域が重なる前記液晶セルの端部に対応する位置からの距離が0mm以上80mm未満の範囲にある前記第1端部側領域の平均層厚をt1とし、
前記第1端部側領域が重なる前記液晶セルの端部に対応する位置からの距離が80mm以上180mm未満の範囲にある前記内側領域の平均層厚をt0とすると、
t1/t0≧1.2
の関係を満たす、液晶装置。 - 第1透明基板と、
第2透明基板と、
前記第1透明基板と前記第2透明基板との間に配置され、前記第1透明基板及び前記第2透明基板よりも平面視の大きさが小さく、液晶層を有する液晶セルと、
前記第1透明基板と前記液晶セルとの間に配置され前記液晶セルよりも平面視の大きさが大きい第1接合層と、
前記第2透明基板と前記液晶セルとの間に配置され前記液晶セルよりも平面視の大きさが大きい第2接合層と、
を備え、
前記第1接合層は、OCRであり、
液晶装置を実際の使用状態を想定して板面が重力方向に沿うように縦に配置した場合の鉛直方向に沿った前記液晶層の断面積をX(mm2)とし、前記液晶セルと重なる範囲の前記第1接合層の厚さをY(μm)とすると、
Y≧110X-170
の関係を満たす、液晶装置。 - 請求項15に記載の液晶装置において、
前記第1接合層のOCRの25℃から85℃における平均線膨張係数は、24.7(E-5/℃)以上である、液晶装置。 - 請求項15又は請求項16に記載の液晶装置において、
前記第1接合層と前記第2接合層との間であって、前記液晶セルの周囲に設けられるOCRの層である第3接合層を備え、
前記液晶セルの外側に配置されている前記第1接合層の周縁領域、及び、前記第3接合層の幅は、10mm以上である、液晶装置。 - 第1透明基板と、
第2透明基板と、
前記第1透明基板と前記第2透明基板との間に配置された液晶セルと、
前記第1透明基板と前記液晶セルとの間に配置された第1接合層と、
前記第2透明基板と前記液晶セルとの間に配置された第2接合層と、
を備え、
前記第1接合層は、OCRであり、25℃の常温環境下での貯蔵弾性率E1から85℃の高温環境下での貯蔵弾性率E2への変化量Vが0%以上30%以下である、液晶装置。
ただし、V=1-(E2/E1)である。 - 請求項18に記載の液晶装置において、
前記変化量Vは、2.7%以上22.7%以下である、液晶装置。 - 請求項18又は請求項19に記載の液晶装置において、
前記第1接合層の硬化収縮率が2.3%以下である、液晶装置。 - 請求項18から請求項20までのいずれか1項に記載の液晶装置において、
圧着性の接着成分を含有する接合体を含まない、液晶装置。
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JP2019533188A (ja) * | 2017-04-25 | 2019-11-14 | エルジー・ケム・リミテッド | 光学デバイス |
WO2019004160A1 (ja) * | 2017-06-26 | 2019-01-03 | 大日本印刷株式会社 | 調光部材、サンバイザ及び移動体 |
WO2019198748A1 (ja) | 2018-04-11 | 2019-10-17 | 大日本印刷株式会社 | 合わせガラス、合わせガラスの製造方法、調光装置、調光セル及び調光装置用積層体 |
JP2020042252A (ja) * | 2018-09-13 | 2020-03-19 | 三星ディスプレイ株式會社Samsung Display Co.,Ltd. | カバーウィンドウ及びこれを含む表示装置 |
JP2019214364A (ja) * | 2019-06-25 | 2019-12-19 | 堺ディスプレイプロダクト株式会社 | 日除け装置 |
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