WO2018131602A1 - Cellule de commande de lumière, élément de commande de lumière, corps mobile et procédé de production d'une cellule de commande de lumière - Google Patents

Cellule de commande de lumière, élément de commande de lumière, corps mobile et procédé de production d'une cellule de commande de lumière Download PDF

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Publication number
WO2018131602A1
WO2018131602A1 PCT/JP2018/000327 JP2018000327W WO2018131602A1 WO 2018131602 A1 WO2018131602 A1 WO 2018131602A1 JP 2018000327 W JP2018000327 W JP 2018000327W WO 2018131602 A1 WO2018131602 A1 WO 2018131602A1
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WO
WIPO (PCT)
Prior art keywords
sealing material
substrate
light control
liquid crystal
crystal layer
Prior art date
Application number
PCT/JP2018/000327
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English (en)
Japanese (ja)
Inventor
啓介 三浦
Original Assignee
大日本印刷株式会社
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Publication date
Application filed by 大日本印刷株式会社 filed Critical 大日本印刷株式会社
Priority to JP2018561385A priority Critical patent/JP7037769B2/ja
Publication of WO2018131602A1 publication Critical patent/WO2018131602A1/fr
Priority to JP2022028604A priority patent/JP7276537B2/ja

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    • 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
    • G02F1/1339—Gaskets; Spacers; Sealing of cells

Definitions

  • the present invention relates to a light control cell capable of changing transmittance using a liquid crystal layer, a light control member including the light control cell, and a movable body including the light control member.
  • the present invention also relates to a method for manufacturing a light control cell capable of changing transmittance using a liquid crystal layer.
  • JP8-184273A discloses a light control glass window (light control cell) in which the light transmittance can be adjusted in various patterns according to changes in the sunshine conditions. According to this light control glass window, the transmittance can be adjusted by changing the voltage acting on the liquid crystal molecules in the liquid crystal layer enclosed between the two transparent glass substrates to change the orientation of the liquid crystal molecules. Can do.
  • the present inventors are examining the use of a resin base material instead of glass as a substrate for partitioning the liquid crystal layer.
  • a resin base material By using a resin base material, it is possible to enjoy advantages such as weight reduction, but on the other hand, there is a problem that an electrode is short-circuited.
  • the present inventor has found that the following are the main causes of electrode short-circuiting. That is, in the light control cell using the resin base material instead of the glass base material, the substrate is easily bent. And then. The electrode extending to the outside of the sealing material for connection with the external electrode was short-circuited due to the bending of the substrate.
  • the present invention is based on such knowledge of the present inventor and aims to provide a highly reliable light control cell by effectively avoiding a short circuit of an electrode.
  • the dimming cell comprises: A dimming cell with variable transmittance, A first substrate including a first resin substrate; A second substrate including a second resin base material; A liquid crystal layer provided between the first substrate and the second substrate; A sealant positioned between the first substrate and the second substrate and surrounding the liquid crystal layer in a circumferential shape, At least one of the first substrate and the second substrate includes an electrode; The peripheral edge of the at least one substrate is located on the sealing material at least in part.
  • the thickness of the sealing material in the cross section orthogonal to the longitudinal direction of the sealing material extending circumferentially, the thickness of the sealing material may be the thinnest at the end portion on the liquid crystal layer side. .
  • the thickness of the sealing material at the end opposite to the liquid crystal layer side in the cross section orthogonal to the longitudinal direction of the sealing material extending in the circumferential direction is the liquid crystal layer It may be thicker than the thickness of the sealing material at the end on the side.
  • the thickness of the sealing material at the end opposite to the liquid crystal layer side in the cross section orthogonal to the longitudinal direction of the sealing material extending in the circumferential direction is the liquid crystal layer It may be 1.5 times or more the thickness of the sealing material at the end on the side.
  • the thickness of the sealing material at a portion where the peripheral edge of the at least one substrate is located is the side of the liquid crystal layer It may be thicker than the thickness of the sealing material at the end.
  • the thickness of the sealing material in a portion where the peripheral edge of the at least one substrate is located is 10 ⁇ m or more. Also good.
  • the maximum thickness of the sealing material may be 1.5 times or more the thickness of the liquid crystal layer. Good.
  • the at least one substrate includes a connection portion with an external power source,
  • the peripheral edge of the at least one substrate may be located on the sealing material in other portions except the connection portion.
  • the first substrate includes a first connection part connected to an external power source
  • the second substrate includes a second connection part connected to an external power source
  • the first connection portion and the second connection portion are disposed at positions facing each other,
  • the width of the sealing material is wider in the portion where the first connection portion and the second connection portion are provided than in other portions except for the portion where the first connection portion and the second connection portion are provided. It may be.
  • the maximum thickness of the sealing material is a distance between the first connection portion and the second connection portion. May be larger.
  • the light control member according to the present invention is: A transparent member; One of the above-mentioned light control cells laminated on the transparent member.
  • the moving body according to the present invention includes the above-described dimming member.
  • FIG. 1 is a perspective view schematically illustrating a moving body provided with a light control member, for explaining an embodiment according to the present invention.
  • FIG. 1 schematically shows an automobile provided with a light control member as an example of a moving body.
  • FIG. 2 is a longitudinal sectional view showing an example of the light control member.
  • FIG. 3 is a view for explaining an embodiment of the present invention, and is a longitudinal sectional view showing a schematic configuration of a light control device.
  • 4 is a longitudinal sectional view showing an example of a light control cell included in the light control device of FIG.
  • FIG. 5 is a longitudinal sectional view corresponding to FIG. 4 and showing another example of the light control cell.
  • FIG. 6 is a diagram for explaining a method of manufacturing the light control cell.
  • FIG. 1 schematically shows an automobile provided with a light control member as an example of a moving body.
  • FIG. 2 is a longitudinal sectional view showing an example of the light control member.
  • FIG. 3 is a view for explaining
  • FIG. 7 is a diagram for explaining a method of manufacturing the light control cell.
  • FIG. 8 is a diagram for explaining a method of manufacturing the light control cell.
  • FIG. 9 is a diagram for explaining a method of manufacturing the light control cell.
  • FIG. 10 is a plan view showing the dimming cell.
  • FIG. 11 is a cross-sectional view taken along line XI-XI in FIG.
  • FIG. 12 is a diagram corresponding to FIG. 10 for explaining a modification of the light control cell.
  • FIG. 13 is a diagram corresponding to FIG. 11 and illustrating a modified example of the connection portion of the dimming cell.
  • FIG. 14 is a partially enlarged plan view showing the light control cell shown in FIG.
  • FIG. 15 is a diagram corresponding to FIG.
  • FIG. 10 is a diagram for explaining another modification of the light control cell.
  • FIG. 16 is a diagram corresponding to FIG. 10 and is a diagram for explaining still another modification of the dimming cell.
  • FIG. 17 is a longitudinal sectional view taken along line XVII-XVII in FIG. 16 corresponding to FIG. 11, and is a diagram for explaining still another modification of the light control cell.
  • 18 is a longitudinal sectional view taken along the line XVIII-XVIII in FIG. 16 corresponding to FIG. 11, and is a diagram for explaining still another modification of the connection portion of the light control cell.
  • FIG. 19 is a view corresponding to FIG. 9 and illustrating another example of the method for manufacturing the light control cell.
  • the terms “plate”, “sheet” and “film” are not distinguished from each other only based on the difference in designation.
  • the term “plate” is a concept including a member that can be called a sheet or a film.
  • FIG. 1 is a diagram schematically showing a moving body provided with a light control member
  • FIG. 2 is a cross-sectional view of the light control member
  • the light control device 10 includes a light control cell 20 and a light control controller 12 electrically connected to the light control cell 20.
  • the light control cell 20 includes a first substrate 30 including a first resin base material 32, a second substrate 40 including a second resin base material 42, a first resin base material 32, and a second resin base material.
  • the plurality of spacers 50 provided between 42, the liquid crystal layer 55 provided between the first substrate 30 and the second substrate 40, and the liquid crystal layer 55 between the first substrate 30 and the second substrate 40.
  • a sealing material 51 surrounding the periphery at least one of the first substrate 30 and the second substrate 40 includes an electrode 33.
  • the transmittance of light transmitted through the light control cell 20 can be changed according to the degree of voltage application from the light control controller 12 to the electrode 33.
  • the application target of the light control device 10 is not particularly limited, and the light control cell 20 can be applied to a window or a door of the moving body 1 such as an airplane, a ship, a train, and an automobile.
  • FIG. 1 shows an automobile as an example of the moving body 1, and a dimming cell 20 is applied to a sunroof of the automobile.
  • the dimming cell 20 is bonded to a transparent member 11 such as glass, or, as shown in FIG. 2, a pair of transparent members 11 such as glass. It is sandwiched between and used. That is, as an application example of the light control cell 20 of the light control device 10, the moving body 1 includes a light control member 5 having a transparent member 11 and a light control cell 20 stacked on the transparent member 11. It can be provided as a door or the like.
  • the dimming controller 12 can adjust the voltage applied to the liquid crystal layer 55 based on an arbitrary method. For example, the dimming controller 12 adjusts the voltage applied to the liquid crystal layer 55 in accordance with the measurement result of the sensor device 14 or an instruction (command) input by the user via the user operation unit 16, and the dimming cell 20. It is possible to switch between blocking and transmitting light and changing the light transmittance. Therefore, the dimming controller 12 may automatically adjust the voltage applied to the liquid crystal layer 55 according to the measurement result of the sensor device 14 or manually according to a user instruction via the user operation unit 16. May be adjusted.
  • the measurement target by the sensor device 14 is not particularly limited. For example, the brightness of the usage environment may be measured.
  • the light control cell 20 may block light and switch transmission or change the light transmittance. This is done according to the brightness of the usage environment.
  • both the sensor device 14 and the user operation unit 16 are not necessarily connected to the dimming controller 12, and only one of the sensor device 14 and the user operation unit 16 may be connected. .
  • the light control cell 20 includes the pair of substrates 30 and 40 and the liquid crystal layer 55 disposed between the pair of substrates 30 and 40. At least one of the pair of substrates 30 and 40 has an electrode.
  • the first substrate 30 and the second substrate 40 have a configuration that makes it possible to change the orientation of the liquid crystal molecules contained in the liquid crystal material 56 forming the liquid crystal layer 55 by applying a voltage from the dimming controller 12. Yes.
  • the driving method of the liquid crystal molecules is not particularly limited. For example, the VA (Vertical Alignment) method, the TN (Twisted Nematic) method, the IPS (In Plane Switching) method, the GH (Guest Host) method, or these methods can be used. Applied methods can be adopted.
  • the first substrate 30, the second substrate 40, and the liquid crystal layer 55 can be appropriately selected according to the adopted liquid crystal molecule driving method.
  • the liquid crystal material 56 forming the liquid crystal layer 55 includes a dichroic dye together with liquid crystal molecules.
  • the first substrate 30 and the second substrate 40 may not include a polarizing plate.
  • FIG. 4 shows a specific configuration example of the dimming cell 20 adopting the VA method.
  • a specific example of the light control cell 20 will be described with reference to the example shown in FIG.
  • the first substrate 30 includes a first polarizing plate 31, a first resin base material 32, a first electrode 33, and a first alignment film 34 in order from the side away from the liquid crystal layer 55.
  • the second substrate 40 includes a second polarizing plate 41, a second resin base material 42, a second electrode 43, and a second alignment film 44 in order from the side away from the liquid crystal layer 55.
  • the polarizing plates 31 and 41 selectively absorb one linearly polarized light component that vibrates in a direction parallel to the absorption axis and select the other linearly polarized light component that vibrates in a direction parallel to the transmission axis perpendicular to the absorption axis. It is a layer having a polarizing function for transmitting light.
  • the polarizing plates 31 and 41 may include a polarizer and an adhesive layer for bonding the polarizer to the resin base materials 32 and 42.
  • the polarizer is configured to exhibit a desired polarization function, and is typically made by stretching PVA (polyvinyl alcohol) doped with an iodine compound.
  • PVA polyvinyl alcohol
  • the absorption axis of the polarizer is determined according to the direction of the stretching, and the polarizers stretched in the same direction have absorption axes in the same direction.
  • the transmittance in the non-transmissive state can be more reliably lowered by disposing the first polarizing plate 31 and the second polarizing plate 41 in “crossed Nicols”.
  • the resin base materials 32 and 42 are made of sheet-like resin. By using the resin base materials 32 and 42 instead of the glass base material, a thin and light weight can be realized. Moreover, by using the resin base materials 32 and 42, flexibility can be imparted to the light control cell 20, and the light control cell 20 can be formed into a three-dimensional curved surface shape as well as a two-dimensional curved surface shape.
  • the two-dimensional curved surface is a curved surface that is bent two-dimensionally around a single axis, or a curved surface that is bent two-dimensionally with the same or different curvature around a plurality of parallel axes. is there.
  • the three-dimensional curved surface means a surface that is partially or wholly bent around each of a plurality of non-parallel axes.
  • flexible resin base materials 32 and 42 applicable to the light control cell 20 include TAC (triacetyl cellulose), polycarbonate, COP (cycloolefin polymer), acrylic, and PET (polyethylene terephthalate).
  • TAC triacetyl cellulose
  • polycarbonate polycarbonate
  • COP cycloolefin polymer
  • acrylic polyethylene terephthalate
  • PET polyethylene terephthalate
  • the resin base materials 32 and 42 may include a plurality of resin layers.
  • the resin base materials 32 and 42 may have a pair of hard coat layers and a main resin layer disposed between the pair of hard coat layers.
  • Each hard coat layer serves to protect the adjacent main resin layer and can be made of any material that can transmit visible light.
  • the hard coat layer may be made of, for example, TAC (Triacetylcellulose) or acrylic, and may be attached to the main resin layer via an adhesive layer.
  • a cured film containing fine particles for example, titanium dioxide
  • the hard coat layers formed at a plurality of locations of the first resin base material 32 and the second resin base material 42 may be made of different materials depending on the arrangement position, or may be made of the same material. Good.
  • the electrodes 33 and 43 are formed as transparent electrodes by various materials such as ITO (Indium Tin Oxide (indium tin oxide)).
  • the electrodes 33 and 43 are connected to the dimming controller 12 via, for example, FPC (Flexible Printed Circuits).
  • positioning aspect of the 1st electrode 33 and the 2nd electrode 43 is not specifically limited, An electrode may be arrange
  • An electric field acting on the liquid crystal layer 55 disposed between the first electrode 33 and the second electrode 43 is formed according to the voltage applied to the first electrode 33 and the second electrode 43, and the liquid crystal layer 55 is configured. The alignment of the liquid crystal molecules in the liquid crystal material 56 is adjusted.
  • the alignment films 34 and 44 are layers adjacent to the liquid crystal layer 55 and control the alignment of the liquid crystal molecules in the liquid crystal layer 55.
  • the manufacturing method of the alignment films 34 and 44 is not specifically limited.
  • the first alignment film 34 and the second alignment film 44 having liquid crystal alignment ability can be formed by any method.
  • the alignment films 34 and 44 may be produced by rubbing a resin layer such as polyimide, or the polymer film is irradiated with linearly polarized ultraviolet rays to selectively select the polymer chains in the polarization direction.
  • the alignment films 34 and 44 may be produced based on the photo-alignment method to be reacted. Instead of the alignment layer and the photo-alignment layer by such a rubbing treatment, a fine line-shaped uneven shape produced by the rubbing treatment may be produced by a shaping treatment to produce the orientation layer.
  • the substrates 30 and 40 may have a simple resin layer that has not been subjected to the alignment treatment instead of the alignment film, or may have no alignment film and the electrode 33. 43 and the liquid crystal layer 55 may be in direct contact with each other.
  • a liquid crystal layer 55 is provided between the first alignment film 34 and the second alignment film 44.
  • the liquid crystal layer 55 includes a liquid crystal material 56.
  • the VA mode is adopted, and the liquid crystal material 56 includes nematic liquid crystal having negative dielectric anisotropy.
  • the alignment of the liquid crystal molecules is regulated by the alignment ability of the alignment films 34 and 44 in a state where no voltage is applied between the pair of electrodes 33 and 43, and becomes a vertical alignment. At this time, the polarization state of the light transmitted through the liquid crystal layer 55 is maintained.
  • a voltage is applied between the pair of electrodes 33 and 43, the liquid crystal molecules are tilted under the control of an electric field.
  • one linearly polarized light component becomes the other linearly polarized light component. That is, when the polarizing plates 31 and 41 are arranged in crossed Nicols, the light is transmitted (white display) in the applied state, and the light is blocked (black display, normally black) in the non-applied state.
  • a sealing material 51 is provided between the pair of substrates 30 and 40. As shown in FIG. 10 described later, the sealing material 51 surrounds the liquid crystal layer 55 in a circumferential shape. That is, the sealing material 51 defines the liquid crystal layer 55 that is filled with the liquid crystal material 56.
  • the sealing material 51 serves to prevent leakage of the liquid crystal material 56 constituting the liquid crystal layer 55 from between the pair of substrates 30 and 40, and the first substrate 30 (first alignment film 34) and the second substrate 40 (first It adheres to the two-alignment film 44) and serves to fix them together.
  • the peripheral edges 39 and 49 of at least one of the substrates 30 and 40 are positioned on the seal material 51 at least in part. With such a configuration, it is possible to effectively avoid a short circuit between the electrodes 33 and 43 and improve the reliability of the light control cell 20 and the light control device 10.
  • the peripheral edges 39 and 49 are positioned on the sealing material in addition to the peripheral edges 39 and 49 being positioned between both ends of the sealing material 51 in the cross section orthogonal to the longitudinal direction of the sealing material 51, as shown in FIG. As shown, the peripheral edges 39 and 49 are included on the end portion of the sealing material 51.
  • the spacer 50 is disposed between the first resin base material 32 of the first substrate 30 and the second resin base material 42 of the second substrate 40.
  • the spacer 50 secures a space between the first resin base material 32 and the second resin base material 42.
  • a liquid crystal layer 55 is formed by filling the space with a liquid crystal material 56.
  • the liquid crystal layer 55 described above controls the amount of phase modulation of transmitted light, and therefore needs to have a certain thickness between the pair of substrates 30 and 40.
  • the plurality of spacers 50 are discretely arranged in a region between the pair of resin base materials 32 and 42.
  • Each spacer 50 can be made of various resin materials, and may have a shape such as a frustum (for example, a truncated cone or a truncated pyramid), or may have a spherical bead shape.
  • the columnar spacer 50 can be formed at a desired location by using a photolithography technique, and the bead-shaped spacer may be dispersed and applied in liquid crystal or alignment film ink in addition to the spraying method.
  • the first alignment film 34 extends adjacent to the first electrode 33 and extends along the first electrode 33. That is, the first alignment film 34 is provided adjacent to the first electrode 33 in a planar shape.
  • the spacer 50 is provided between the second alignment film 44 and the second electrode 43.
  • the second alignment film 44 extends along the second electrode 43 and the spacer 50. That is, the surface of the second alignment film 44 opposite to the liquid crystal layer 55 is in contact with either the second electrode 43 or the spacer 50.
  • the first alignment film 34 of the first substrate 30 and the second alignment film 44 of the second substrate 40 are in contact with each other on the spacer 50.
  • the spacer 50 is located between the pair of resin base materials 32 and 42, the spacer 50 is located not in the pair of substrates 30 and 40 but in the second substrate 40.
  • the spacer 50 may be disposed between the pair of substrates 30 and 40 as in the example shown in FIG. 5, for example.
  • the second alignment film 44 similarly to the first alignment film 34, the second alignment film 44 extends adjacent to the second electrode 43 and extends along the second electrode 43.
  • a second plate member 140 including a second resin base material 42 and a spacer 50 are prepared.
  • the second plate member 140 is a member that forms the second substrate 40 by being trimmed.
  • the second plate member 140 can be manufactured as follows. First, the second electrode 43 is formed on the second resin base material 42 by sputtering or the like. Next, the composition that forms the second alignment film 44 is applied on the second alignment film 44, and then the alignment regulating force is applied to the coating film by rubbing, photo-alignment, etc. 44 is produced. Then, the 2nd board
  • plate material 140 is obtained by bonding the 2nd polarizing plate 41 to the 2nd resin-made base materials 42.
  • the spacer 50 can be manufactured using a photolithography technique.
  • the spacer 50 is formed on the second electrode 43 before the second alignment film 44.
  • the second alignment film 44 is formed on the second electrode 43 before the spacer 50.
  • a sealing material 52 is applied in a circumferential shape.
  • the sealing material 52 is a viscous liquid material having adhesiveness or tackiness.
  • the seal material 52 is cured to form the seal material 51.
  • a liquid crystal material 56 containing liquid crystal molecules is supplied to a region on the second plate member 140 surrounded by the seal material 52.
  • the first plate member 130 including the first resin base material 32 is laminated on the second plate member 140 under reduced pressure.
  • the first plate member 130 is a member that forms the first substrate 30 by being trimmed.
  • the first plate member 130 can be manufactured in the same process as the second plate member 140. That is, the first plate member 130 is formed by forming the first electrode 33 on the first resin base material 32 and applying the composition that forms the first alignment film 34 on the first alignment film 34. By applying an orientation regulating force to the coating film, the first alignment film 34 can be produced, and then the first polarizing plate 31 can be bonded to the first resin substrate 32.
  • the liquid crystal material 56 filled in the space secured by the spacer 50 between the first plate member 130 and the second plate member 140 becomes the liquid crystal layer 55.
  • the sealing material 52 is deformed and cured to become the sealing material 51, and the first plate material 130 and the second plate material 140 are joined.
  • the first plate member 130, the second plate member 140, the liquid crystal layer 55 provided between the first plate member 130 and the second plate member 140, and the first plate member 130 and the second plate member 140 are interposed.
  • a part of the plate members 130 and 140 is cut to remove the outer periphery of the plate members 130 and 140 which are extra regions, that is, the plate members 130 and 140 are trimmed.
  • This cutting is performed at least partially on the sealing material 51.
  • the cutting may be performed on the sealing material 51 in the entire outer circumference of the plate materials 130 and 140. Trimming of the plate materials 130 and 140 can be performed using a tool 59 made of a punching blade, a cutter, or the like.
  • a part of the first plate member 130 is cut and removed by trimming.
  • FIG. 9 a part of the first plate member 130 is cut and removed by trimming.
  • not only the first plate member 130 but also a part of the seal member 51 and a part of the second plate member 140 may be cut and removed by trimming.
  • the first plate member 130 becomes the first substrate 30
  • the second plate member 140 becomes the second substrate 40, whereby the light control cell 20 is obtained.
  • a part of the seal material 51 and a part of the second plate material 140 are also cut together with the first plate material 130, the peripheral edge 39 of the first substrate 30 and the peripheral edge 49 of the second substrate 40 and the seal in plan view. It coincides with the end of the material 51.
  • the orientation of liquid crystal molecules in the liquid crystal layer 55 can be controlled by applying a voltage from the light control controller 12 to the electrodes 33 and 43.
  • the amount of phase modulation of light when passing through the liquid crystal layer 55 changes.
  • the transmittance of light transmitted through the first substrate 30, the liquid crystal layer 55, and the second substrate 40 can be changed.
  • a short circuit may occur in the conventional dimming cell. If a short circuit occurs, it may not be possible to apply a voltage to the electrodes 33 and 43, and it will no longer function as a dimmer. Therefore, it can be said that the occurrence of a short circuit is a fatal malfunction for the dimming cell 20. And such a malfunction became easy to produce in the light control cell using resin base materials 32 and 42 instead of the highly rigid glass base material.
  • the present inventor has found the following as a result of earnest research.
  • the electrode of the dimming cell has been extended beyond the sealing material in order to connect to an external power source (in the illustrated example, the dimming controller 12). That is, the electrode is disposed not only in the region facing the liquid crystal layer 55 but also outside the sealing material. For this reason, the resin base material is deformed, and as a result, the electrodes supported by the pair of resin base materials are in contact with each other or with an external conductor, thereby causing a short circuit. It was. In particular, it is considered that a substrate including a resin base material instead of a glass base material is easily bent, and thus a short circuit failure is likely to occur.
  • the peripheral edges 39 and 49 of at least one of the substrates 30 and 40 are positioned on the sealing material 51 at least at a part of the peripheral edge. That is, part of the peripheral edges 39 and 49 of the substrates 30 and 40 does not extend beyond the sealing material 51. Therefore, the substrates 30 and 40 are stably supported by the sealing material 51 on the contrary, without causing deformation such as bending which has caused the short circuit in this portion. Thereby, the malfunction that a short circuit arises can be avoided effectively and the reliability of the light control apparatus 10 and the light control cell 20 can be improved.
  • both the first substrate 30 and the second substrate 40 have electrodes 33 and 43.
  • a part of the peripheral edges 39 and 49 is disposed on the sealing material 51 for both the first substrate 30 and the second substrate 40.
  • the outside of the sealing material refers to the opposite side of the sealing material 51 from the side surrounded by the sealing material 51 (that is, the liquid crystal layer 55 side).
  • the first substrate 30 has a first connection portion 38 that is connected to an external power supply (in the illustrated example, the dimming controller 12).
  • the first connecting portion 38 includes a first resin base material 32 and a first electrode 33 supported on the first resin base material 32 and exposed on the first resin base material 32. It is out.
  • the peripheral edge 39 of the first substrate 30 is located on the sealing material 51 in the entire periphery except the first connection portion 38. That is, the first electrode 33 extends outward beyond the sealing material 51 together with the first resin base material 32 only in a portion necessary for connection with an external power source. According to such a configuration of the first substrate 30, it is possible to more effectively prevent the occurrence of a short circuit.
  • the second substrate 40 also has a second connection portion 48 that is connected to an external power source (in the illustrated example, the dimming controller 12).
  • the second connection portion 48 includes a second resin base 42 and a second electrode 43 supported on the second resin base 42 and exposed on the second resin base 42. It is out.
  • the peripheral edge 49 of the second substrate 40 is located on the sealing material 51 in the entire periphery excluding the second connection portion 48. That is, the second electrode 43 extends outward beyond the sealing material 51 together with the second resin base material 42 only in a portion necessary for connection to an external power source. According to such a configuration of the second substrate 40, the occurrence of a short circuit can be prevented more effectively.
  • FIG. 11 shows a cross section taken along the line XI-XI of FIG. That is, FIG. 11 shows a cross section passing through the second connection portion 48 of the second substrate 40.
  • a connection member 65 that communicates with an external power source (in the illustrated example, the dimming controller 12), for example, FPC (Flexible Printed Circuits).
  • the second electrode 43 is electrically connected to the connection member.
  • the first substrate 30 including the first electrode 33 is not disposed at a position facing the exposed second electrode 43. Further, most of the second electrode 43 is also covered with the connection member 65. Therefore, it can be understood from FIG. 11 that the second electrode 43 can be effectively prevented from being short-circuited to the first electrode 33 or from being short-circuited to the external conductor.
  • the light control cell 20 is the light control cell 20 having a variable transmittance, and includes the first substrate 30 including the first resin base material 32 and the second resin base material. 42, the liquid crystal layer 55 provided between the first substrate 30 and the second substrate 40, and the liquid crystal layer 55 located between the first substrate 30 and the second substrate 40 in a circumferential shape. And a sealing material 51 that surrounds.
  • At least one of the first substrate 30 and the second substrate 40 includes electrodes 33 and 43, and according to the degree of voltage application to the electrodes 33 and 43, that is, according to the applied voltage amount, The transmittance of light transmitted through the first substrate 30, the liquid crystal layer 55, and the second substrate 40 can be changed.
  • the peripheral edges 39 and 49 of at least one of the substrates 30 and 40 are located on the sealing material 51 at least in part. According to such a light control cell 20, the short circuit of the electrodes 33 and 43 can be effectively avoided, and the operation reliability of the light control cell 20 can be improved.
  • At least one of the substrates 30 and 40 includes connection portions 38 and 48 to the external power source 12, and at least one of the peripheral edges 39 and 49 of the substrates 30 and 40 has connection portions. Other portions except for 38 and 48 are located on the sealing material 51. According to such a light control cell 20, the short circuit of the electrodes 33 and 43 can be avoided more effectively, and the operation reliability of the light control cell 20 can be further improved.
  • the peripheral edges 39 and 49 are positioned on the sealing material 51 in the other portions except the connection portions 38 and 48 for both the first substrate 30 and the second substrate 40.
  • the short circuit prevention function can be exhibited.
  • the peripheral edge 39 of the first substrate 30 is located on the sealing material 51 in a portion other than the first connection portion 38.
  • the peripheral edge 49 of the second substrate 40 is located on the sealing material 51 in a region that faces the first connection portion 38 of the first substrate 30.
  • the peripheral edge of the second substrate 40 is located on the sealing material 51 at one side facing the first connecting portion 38 of the first substrate 30, and the other edge extends outward beyond the sealing material 51 in the other. It extends. Even in such a modification, the reliability of the light control device 10 and the light control cell 20 can be improved by sufficiently exhibiting the short-circuit prevention function.
  • connection part 48 shown by FIG. 11 is only an example, and it is also possible to change the structure of a connection part suitably as shown, for example in FIG.13 and FIG.14.
  • the first substrate 30 and the second substrate 40 respectively extend in a part of the peripheral edges 39 and 49 and extend outward beyond the seal material 51.
  • a portion 37 and a second extending portion 47 are provided.
  • the 1st extension part 37 and the 2nd extension part 47 are located facing.
  • the first extending portion 37 includes a first resin base material 32 and a first electrode 33 supported by the first resin base material 32.
  • the second extending portion 47 includes a second resin base material 42 and an auxiliary electrode 46 supported by the second resin base material 42. As shown in FIG.
  • the auxiliary electrode 46 is insulated away from the second electrode 43.
  • the auxiliary electrode 46 and the second electrode 43 can be easily made of the same material by patterning one conductive layer.
  • a connection electrode 57 that electrically connects the first electrode 33 and the auxiliary electrode 46 in the first extension portion 37 is provided.
  • the auxiliary electrode 46 is electrically connected to the first electrode 33 via the connection electrode 57 and is connected to an external power source (for example, the dimming controller 12).
  • an FPC Flexible Printed Circuits
  • the first extending portion 37 of the first substrate 30 constitutes a first connecting portion 38
  • the second extending portion 47 of the second substrate 40 constitutes a second connecting portion 48.
  • the first substrate 30 is located on the sealing material 51 in the other portions except for the first connection portion 38. Even in such an example, the reliability of the light control device 10 and the light control cell 20 can be improved by sufficiently exhibiting the short-circuit prevention function.
  • the configuration illustrated in FIGS. 13 and 14 is particularly effective for preventing a short circuit. It is.
  • the upper first substrate 30 is bent to approach the second substrate 40, but the first substrate 30 supports the connection member 65 by directly connecting to the connection member 65. There is no need.
  • the bending of the first substrate 30 can be effectively prevented.
  • the first extending portion 37 does not have to be directly connected to the connecting member 65, the extending amount of the first extending portion 37 of the first substrate 30 is set to the extension of the second extending portion 47 of the second substrate 40. It can be made shorter than the amount of protrusion, and the 1st extension part 37 can be made hard to bend. This point is also effective in preventing the first substrate 30 from being bent, and as a result, a short circuit can be effectively prevented.
  • the peripheral edges 39 and 49 it is not necessary for the peripheral edges 39 and 49 to be located on the sealing material 51 in other portions except for the connection portions 38 and 48 for at least one of the first substrate 30 and the second substrate 40.
  • the sealing material 51 extends along a rectangular outer contour.
  • the peripheral edge 39 of the first substrate 30 is located on the sealing material 51 in two adjacent sides (first side s1 and second side s2) of the quadrilateral shape, and the other two adjacent sides (first side) of the quadrangular shape.
  • the first substrate 30 has a first connecting portion 38 at a portion beyond the sealing material 51 (third side s3).
  • the peripheral edge 49 of the second substrate 40 exceeds the sealing material 51 on two adjacent sides (first side s1 and second side s2) of the quadrangular shape where the peripheral edge 39 of the first substrate 30 is overlapped. Extend outward. Further, the peripheral edge 49 of the second substrate 40 is located on the sealing material 51 in the other two adjacent sides (the third side s3 and the fourth side s4) of the square shape.
  • the second substrate 40 has a second connecting portion 48 at a portion beyond the sealing material 51 (second side s2).
  • the peripheral edge 39 of the first substrate 30 is located on the sealing material 51 at least in part. Further, the peripheral edge 49 of the second substrate 40 is located on the sealing material 51 at least in part. Also in the example shown in FIG. 15, the reliability of the light control device 10 and the light control cell 20 can be improved by sufficiently exhibiting the short circuit prevention function.
  • the 1st connection part 38 and the 2nd connection part 48 are not arrange
  • the first connecting portion 38 and the second connecting portion 48 may be disposed at positions facing each other.
  • the sealing material 51 extends to the portion where the connecting portions 38 and 48 of the substrates 30 and 40 are provided, and the width W of the sealing material 51 is widened.
  • the two substrates 40 can be made difficult to bend.
  • the width W of the sealing material 51 is a side opposite to the liquid crystal layer 55 side from the one side end portion 51 a which is an end portion of the sealing material 51 on the liquid crystal layer 55 side. It is an interval to the other end 51b which is an end.
  • FIG. 17 is a cross-sectional view of the light control cell 20 along the XVII-XVII line, which is a portion where the connection portions 38 and 48 shown in FIG. 16 are not provided, and FIG. 18 shows the connection portions 38 and 48 shown in FIG. FIG.
  • FIG. 6 is a cross-sectional view of the light control cell 20 taken along line XVIII-XVIII, which is a portion provided with 48;
  • the XVII-XVII line and the XVIII-XVIII line shown in FIG. 16 are orthogonal to the longitudinal direction of the sealing material 51 extending circumferentially.
  • the width W of the sealing material 51 is narrow.
  • the sealing material 51 is not removed, and the width W of the sealing material 51 is not narrowed. Therefore, the width W of the sealing material 51 is wider in the portion provided with the connecting portions 38 and 48 as shown in FIG.
  • the sealing material 51 may be removed also in the portion where the connection portions 38 and 48 are provided.
  • the width W of the sealing material 51 is wide at the portion where the connecting portions 38 and 48 are provided, the substrates 30 and 40 are stably supported by the sealing material 51, so that the connecting portions 38 and 48 are provided.
  • substrates 30 and 40 become difficult to bend in the formed part. Therefore, the short circuit of the electrodes 33 and 43 can be effectively prevented, and the reliability of the light control device 10 and the light control cell 20 can be improved.
  • the thickness of the sealing material 51 is shown to be constant in the cross section orthogonal to the longitudinal direction of the sealing material 51.
  • the thickness of the sealing material 51 may change in a cross section orthogonal to the longitudinal direction of the sealing material 51.
  • the sealing material 52 forming the sealing material 51 is a viscous liquid material
  • the cross-sectional shape of the sealing material 51 in the cross section orthogonal to the longitudinal direction of the sealing material 51 extending in a circumferential shape is as shown in FIG. As shown in FIG. 17 and FIG. 18, it can be thicker at the center and thinner toward the one end 51a and the other end 51b that are both ends.
  • the cross-sectional shape of the sealing material 51 can be thick at the other end 51b and can become thinner toward the one end 51a.
  • the distance between the electrodes 33 and 43 in the entire light control cell 20 is larger than the distance between the electrodes 33 and 43 in the portion where the liquid crystal layer 55 is provided. It is preferable. Since the sealing material 51 is provided between the electrodes 33 and 43, the distance between the electrodes 33 and 43 is equal to or greater than the thickness of the sealing material 51. In the illustrated example, since only the sealing material 51 is provided between the electrodes 33 and 43, the distance between the electrodes 33 and 43 is equal to the thickness of the sealing material 51.
  • the thickness of the sealing material 51 is the thinnest on the liquid crystal layer 55 side in the cross section orthogonal to the longitudinal direction of the sealing material 51 extending in a circumferential shape. Further, as described above, the thickness of the sealing material 51 is thick at the center, and becomes thinner toward the one end 51a and the other end 51b, which are both ends, or thick at the other end 51b. , It becomes thinner toward the one end 51a.
  • the thickness Tb of the sealing material 51 at the other end 51b is 1.5 times or more, preferably 2 or more, more preferably the thickness Ta of the sealing material 51 at the one end 51a. Is 4 times or more, the distance between the electrodes 33 and 43 can be sufficiently increased in the cross section perpendicular to the longitudinal direction of the circumferentially extending sealing material 51, and the short circuit between the electrodes 33 and 43 is effective. Can be prevented.
  • the sealing material 51 becomes thicker, its adhesion is increased, so that the first substrate 30 and the second substrate 40 are prevented from peeling from the sealing material 51.
  • the separation of the first substrate 30 and the second substrate 40 is likely to occur at the ends of the substrates 30, 40, that is, the peripheral edges 39, 49. Therefore, the thickness Te of the sealing material 51 in the portion where at least one of the peripheral edges 39, 49 of the substrates 30, 40 is located in the cross section orthogonal to the longitudinal direction of the sealing material 51 extending in a circumferential shape is the one end 51a. It is preferable that the thickness is larger than the thickness Ta of the sealing material 51 in FIG.
  • the thickness Te of the sealing material 51 is preferably 10 ⁇ m or more as a thickness for securing the adhesive force. As shown in FIG. 19, when the sealing material 51 is removed together with the substrates 30 and 40, the peripheral edges 39 and 49 of the substrates 30 and 40 are positioned as in the example shown in FIG. The thickness Te of the sealing material 51 at the portion is equal to the thickness Tb of the sealing material 51 at the other end 51b.
  • the sealing material 51 serves to prevent leakage of the liquid crystal material 56 constituting the liquid crystal layer 55 from between the pair of substrates 30 and 40, and the first substrate 30 (first alignment film 34) and the second.
  • the maximum thickness Tm of the sealing material 51 in the cross section perpendicular to the longitudinal direction of the sealing material 51 extending in the circumferential direction is the liquid crystal layer 55. It is preferable that the thickness is larger than the thickness Tl. In this case, as well shown in FIGS. 17 and 18, the sealing material 51 protrudes in a direction parallel to the normal direction of the light control cell 20 with respect to the liquid crystal layer 55.
  • the protruding sealing material 51 can protect the liquid crystal layer 55 from, for example, an impact received from a surface where the light control cell 20 extends substantially parallel to the surface. If a portion where the sealing material 51 protrudes, that is, a portion where the maximum thickness Tm of the sealing material 51 is larger than the thickness Tl of the liquid crystal layer 55 exists in at least a part of the light control cell 20, the liquid crystal layer 55. Can be protected, but the liquid crystal layer 55 can be protected more effectively if it exists at three or more locations of the dimming cell 20, and more effectively if it exists at any position of the dimming cell 20. 55 can be protected. In particular, when the maximum thickness Tm of the sealing material 51 is 1.5 times or more, preferably 2 times or more, more preferably 4 times or more of the thickness Tl of the liquid crystal layer 55, the liquid crystal is more effectively used. Layer 55 can be protected.
  • first connecting portion 38 and the second connecting portion 48 are arranged at positions facing each other, as shown in FIG. 18, in the cross section orthogonal to the longitudinal direction of the circumferentially extending sealing material 51,
  • the distance D between the first connecting portion 38 and the second connecting portion 48 is equal to or less than the thickness Tb of the sealing material 51 at the other end 51b.
  • the thickness of the sealing material 51 is thicker at the central portion and becomes thinner toward the one side end portion 51a and the other side end portion 51b.
  • the thickness Tm is greater than the distance D between the first connection portion 38 and the second connection portion 48. In this case, as well shown in FIG.
  • the sealing material 51 protrudes in a direction parallel to the normal direction of the light control cell 20 with respect to the first connection portion 38 and the second connection portion 48.
  • the projecting sealing material 51 can protect the first connection portion 38 and the second connection portion 48 from, for example, an impact received from a surface that the dimming cell 20 extends substantially parallel to the surface.
  • the portion where the seal material 51 protrudes that is, the portion where the maximum thickness Tm of the seal material 51 is thicker than the distance D between the first connection portion 38 and the second connection portion 48 is the dimming cell 20.
  • the first connection part 38 and the second connection part 48 can be protected if they exist in at least a part, but the first connection part 38 and the second connection more effectively if they exist in three or more locations of the dimming cell 20.
  • the part 48 can be protected, and the first connection part 38 and the second connection part 48 can be more effectively protected if present at any position of the dimming cell 20.
  • the maximum thickness Tm of the sealing material 51 is 4 times or more, preferably 6 times or more, more preferably 10 times or more of the distance D between the first connection portion 38 and the second connection portion 48. If it exists, the 1st connection part 38 and the 2nd connection part 48 can be protected more effectively.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Mathematical Physics (AREA)

Abstract

[Problème] L'invention a pour objet d'améliorer la fiabilité d'une cellule de commande de lumière, dans laquelle la transmittance est susceptible d'être modifiée au moyen de l'application d'une tension à des électrodes, tout en évitant efficacement un court-circuit des électrodes. [Solution] Une cellule 20 de commande de lumière selon la présente invention comporte: un premier substrat 30 qui contient un premier matériau de base en résine 32; un deuxième substrat 40 qui contient un deuxième matériau de base en résine 42; une couche 55 de cristaux liquides qui est disposée entre le premier substrat et le deuxième substrat; et un matériau 51 d'étanchéité qui est positionné entre le premier substrat 30 et le deuxième substrat 40 et entoure circonférentiellement la couche 55 de cristaux liquides. Au moins un des premier et deuxième substrats comporte les électrodes. Au moins une partie du bord périphérique d'au moins un des substrats est positionnée sur le matériau d'étanchéité.
PCT/JP2018/000327 2017-01-10 2018-01-10 Cellule de commande de lumière, élément de commande de lumière, corps mobile et procédé de production d'une cellule de commande de lumière WO2018131602A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2018561385A JP7037769B2 (ja) 2017-01-10 2018-01-10 調光セル、調光部材、移動体、調光セルの製造方法
JP2022028604A JP7276537B2 (ja) 2017-01-10 2022-02-25 調光セル、調光部材、移動体、調光セルの製造方法

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JP2017-002140 2017-01-10
JP2017002140 2017-01-10

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PCT/JP2018/000327 WO2018131602A1 (fr) 2017-01-10 2018-01-10 Cellule de commande de lumière, élément de commande de lumière, corps mobile et procédé de production d'une cellule de commande de lumière

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