JP2019200303A - Dimming unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light control unit capable of simplifying a wiring route. A dimming layer 21 is sandwiched between a first transparent electrode layer 23A and a second transparent electrode layer 23B in a dimming region Si, and a first transparent electrode layer 23A is second in a first connected region SA. The second electrode sheet 22B is exposed to the space S2 and is connected to the first connecting portion 30A, and the second electrode layer 22B supports the second transparent electrode layer 23B, and the first space S1 side with respect to the second support layer 24B. The folded portion includes a conductive layer electrically connected to the second transparent electrode layer 23B, and the conductive layer extends from the first space S1 side with respect to the second support layer 24B to the second space S2 side with respect to the second support layer 24B. It is folded back and exposed in the second space S2 in the second connected region SB to be connected to the second connecting portion 30B. [Selection diagram] Figure 2

Description

  The present invention relates to a light control unit including a light control sheet and a connection portion for connecting the light control sheet to a drive circuit.

  The light control sheet includes a light control layer containing a liquid crystal composition and a pair of transparent electrode layers sandwiching the light control layer. The driving voltage applied to the pair of transparent electrode layers changes the light transmittance of the light control sheet by changing the orientation of the liquid crystal molecules (see, for example, Patent Document 1). The light control unit includes a light control sheet and a connection portion for connecting the transparent electrode layer to the drive circuit. The light control sheet divides the space into a first space and a second space.

  For example, as FIG. 19 shows, the light control unit 100 is attached to transparent plates 200, such as a window glass. The light control sheet 110 divides the space into a first space S1 (see FIG. 20) and a second space S2 (see FIG. 20). The first space S <b> 1 is a space where the transparent plate 200 is located, and is a space on the back side of the paper surface relative to the light control sheet 110. The second space S <b> 2 is a space where the first connection portion 160 </ b> A and the second connection portion 160 </ b> B are located, and is a space in front of the light control sheet 110. The light control sheet 110 includes a first electrode sheet 130A and a second electrode sheet 130B. The first connecting portion 160A is connected to the first electrode sheet 130A. The second connection part 160B is connected to the second electrode sheet 130B.

  20 and 21 show a cross-sectional structure of the light control unit 100. FIG. In FIG. 20 and FIG. 21, for the convenience of explaining the members located in the spaces S1 and S2, the transparent plate 200 located in the first space S1 and the connection portion located in the second space S2 are described. Shown with hatching omitted.

  As shown in FIG. 20, the first electrode sheet 130A includes a first transparent electrode layer 140A and a first support layer 150A that supports the first transparent electrode layer 140A. The first transparent electrode layer 140 </ b> A faces the first surface of the light control layer 120. The first support layer 150 </ b> A is attached to the transparent plate 200 via the adhesive layer 210. The first transparent electrode layer 140A includes a connected region 140SA exposed toward the second space S2. 160 A of 1st connection parts are located in 2nd space S2, and are connected to to-be-connected area | region 140SA.

  As shown in FIG. 21, the second electrode sheet 130B includes a second transparent electrode layer 140B and a second support layer 150B that supports the second transparent electrode layer 140B. The second transparent electrode layer 140B faces the second surface of the light control layer 120. The second transparent electrode layer 140B includes a connected region 140SB exposed toward the first space S1. The second connecting portion 160B is located in the first space S1 and connected to the connected region 140SB.

  The first connection portion 160A includes a conductive adhesive layer 161 bonded to the first transparent electrode layer 140A and a conductive tape 162 bonded to the conductive adhesive layer 161. The second connection portion 160B also includes a conductive adhesive layer 161 bonded to the second transparent electrode layer 140B and a conductive tape 162 bonded to the conductive adhesive layer 161. The conductive adhesive layer 161 is formed from a conductive paste such as a silver paste, for example. The conductive tape 162 is, for example, a copper tape. Each connection portion 160 </ b> A, 160 </ b> B includes a solder portion 163 and a lead wire 164 connected to the conductive tape 162 by the solder portion 163. The lead wire 164 is connected to the drive circuit.

JP 2006-162823 A

On the other hand, each connection part 160A, 160B mentioned above is located in separate space S1, S2, and is connected to a separate lead wire. And each lead wire connected to the single light control sheet 110 is pulled out separately from each space S1, S2 divided by the light control sheet 110. As a result, the dimming unit 100 described above causes a complicated wiring route in the dimming unit 100.
An object of the present invention is to provide a light control unit that can simplify a wiring route.

  The light control unit for solving the said subject is a light control sheet which divides | segments space into 1st space and 2nd space, Comprising: The 1st transparent electrode layer which has a 1st transparent electrode layer in order close to the said 1st space. An electrode sheet, a light control layer including a liquid crystal composition, and a second electrode sheet having a second transparent electrode layer, wherein the light control is provided between the first transparent electrode layer and the second transparent electrode layer. The light control sheet in which the layer is located, the first connection part for connecting the first transparent electrode layer and the wiring located in the second space, and the second transparent located in the second space A second connecting portion for connecting the electrode layer and the wiring.

  According to the said structure, a 1st transparent electrode layer and wiring are connected through the 1st connection part located in 2nd space. And a 2nd transparent electrode layer and wiring are connected through the 2nd connection part located in 2nd space. As a result, each wiring connected to the single light control sheet is drawn out from the single second space. Therefore, according to the dimming unit described above, the wiring route in the dimming unit can be simplified.

  In the light control unit, the light control sheet is divided into a first connected region, a light control region, and a second connected region as viewed from the second space. The first transparent electrode layer is exposed to the second space in the first connected region and connected to the first connection portion. The second electrode sheet includes a second support layer, the second transparent electrode layer positioned on the first space side with respect to the second support layer, and the second space layer on the first space side with respect to the second support layer. A folded portion including a conductive layer electrically connected to the transparent electrode layer. The conductive layer is folded from the first space side with respect to the second support layer to the second space side with respect to the second support layer, and is exposed to the second space in the second connected region. You may connect to the said 2nd connection part.

  According to the above configuration, a part of the first transparent electrode layer is exposed to the second space in the first connected region and is connected to the wiring through the first connection portion. The conductive layer electrically connected to the second transparent electrode layer is exposed to the second space in the second connected region and connected to the wiring through the second connection portion. As a result, each wiring connected to the single light control sheet is drawn out from the single second space. Therefore, according to the dimming unit described above, the wiring route in the dimming unit can be simplified.

  In the light control unit, the conductive layer includes a conductive tape separate from the second transparent electrode layer, covers an end surface of the second support layer, and from the first space side with respect to the second support layer. It may be folded back to the second space side with respect to the second support layer. According to this configuration, since the conductive tape that is separate from the second transparent electrode layer functions as the conductive layer of the folded portion, it is possible to employ a shape and material specialized for folding in the conductive layer.

  In the light control unit, the folded portion fills a space between the end surface of the second support layer and the conductive tape, and has an end surface sealing that makes the curvature of the conductive tape smaller than the end surface of the second support layer. May be provided. Since excessive bending in the conductive tape can be suppressed, the stability of the electrical characteristics in the folded portion can be improved.

  In the light control unit, the folded portion is a tip portion of the second electrode sheet, and an extended support layer integral with the second support layer, and an extended electrode layer integral with the second transparent electrode layer The conductive layer may be the extended electrode layer. According to this configuration, since the folded portion is configured by folding the tip portion of the second electrode sheet, an increase in the number of members in the light control unit can be suppressed.

  In the light control unit, the extended support layer may be folded back twice and bonded together by an insulating adhesive layer. According to this configuration, since the extended support layer folded back is bonded with the insulating adhesive layer, the extended support layer can be prevented from returning to the shape before being folded, and the shape stability of the folded portion can be suppressed. Can be improved.

  According to the present invention, the wiring route in the dimming unit can be simplified.

The top view which shows the structure in 1st Embodiment of a light control unit. Sectional drawing along the II-II line of FIG. Process drawing which shows the manufacturing process in 1st Embodiment of a light control unit. Process drawing which shows the manufacturing process in 1st Embodiment of a light control unit. Process drawing which shows the manufacturing process in 1st Embodiment of a light control unit. Process drawing which shows the manufacturing process in 1st Embodiment of a light control unit. Process drawing which shows the manufacturing process in 1st Embodiment of a light control unit. Process drawing which shows the manufacturing process in 1st Embodiment of a light control unit. The sectional side view which shows the prior art example of a light control unit. The top view which shows the example of a change of a light control unit. The top view which shows the structure in 2nd Embodiment of a light control unit. Sectional drawing along the XII-XII line of FIG. Process drawing which shows the manufacturing process in 2nd Embodiment of a light modulation unit. Process drawing which shows the manufacturing process in 2nd Embodiment of a light modulation unit. Process drawing which shows the manufacturing process in 2nd Embodiment of a light modulation unit. Process drawing which shows the manufacturing process in 2nd Embodiment of a light modulation unit. Process drawing which shows the manufacturing process in 2nd Embodiment of a light modulation unit. The top view which shows the example of a change of a light control unit. The top view which shows the prior art example of a light control unit. The sectional side view which shows the prior art example of a light control unit. The sectional side view which shows the prior art example of a light control unit.

(First embodiment)
1st Embodiment of a light control unit is described with reference to FIGS.
[Configuration of light control unit]
As shown in FIG. 1, the light control unit 10 includes a light control sheet 20, a first connection portion 30A, and a second connection portion 30B. The light control unit 10 is attached to the transparent plate 200. The light control sheet 20 divides the space into a first space S1 (see FIG. 2) and a second space S2 (see FIG. 2). The first space S1 is a space on the back side of the drawing with respect to the light control sheet 20, and the transparent plate 200 is located therein. The second space S2 is a space closer to the paper surface than the light control sheet 20, and the connection portions 30A and 30B are located therein.

  The transparent plate 200 is an example of a transparent member. The transparent plate 200 is a building material such as a window glass, a partition, and a glass wall. The transparent plate 200 is a member for a vehicle such as a window glass of an automobile, a case of a headlamp, a case of a vehicle width lamp, and a case of a tail lamp. The shape of the transparent plate 200 may be a flat plate shape or a curved plate shape.

  The light control sheet 20 has a rectangular planar shape when viewed from the second space S2. The light control sheet 20 is divided into a light control region Si, a first connected region SA, and a second connected region SB as viewed from the second space S2.

  The first connecting portion 30A is connected to the first connected area SA. The second connection part 30B is connected to the second connected region SB. The positions of the connected areas SA and SB are appropriately set according to the shape of the transparent plate 200, the position of the drive circuit, and the like.

  Each connected area SA, SB is located at, for example, a separate corner of the light control sheet 20. Each of the connected areas SA and SB is, for example, a rectangular area along the lower side of the light control sheet 20, and is arranged along the lower side of the light control sheet 20. The dimming area Si includes an inter-connected area Se between the first connected area SA and the second connected area SB.

FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
As shown in FIG. 2, the light control sheet 20 includes a light control layer 21, a first electrode sheet 22A, and a second electrode sheet 22B. The first electrode sheet 22A includes a first transparent electrode layer 23A and a first support layer 24A that supports the first transparent electrode layer 23A. A surface of the first support layer 24 </ b> A opposite to the surface in contact with the first transparent electrode layer 23 </ b> A is attached to the transparent plate 200 via the adhesive layer 50. The second electrode sheet 22B includes a second transparent electrode layer 23B and a second support layer 24B that supports the second transparent electrode layer 23B.

  The back surface of the light control sheet 20 functions as a surface that is attached to the transparent plate 200. The back surface of the light control sheet 20 is a surface exposed to the first space S1, and is covered with the transparent plate 200 located in the first space S1. The surface of the light control sheet 20 is a surface opposite to the back surface. The surface of the light control sheet 20 is exposed to the second space S2.

  The light control layer 21 is sandwiched between the first electrode sheet 22A and the second electrode sheet 22B in the light control region Si. The laminate 26 includes a light control layer 21 between the first electrode sheet 22A and the second electrode sheet 22B, and is positioned in the light control region Si. The dimming region Si includes a connected region Se and a region other than the connected region Se. The layer configuration of the inter-connected region Se and the layer configuration of the region other than the inter-connected region Se coincide with each other.

  The light control layer 21 contains a liquid crystal composition. The light control layer 21 is made of, for example, a polymer network liquid crystal (PNLC), a polymer dispersed liquid crystal (PDLC), a capsule nematic liquid crystal (NCAP), or the like. Composed. For example, a polymer network type liquid crystal includes a polymer network having a three-dimensional network, and holds liquid crystal molecules in voids of the polymer network. The liquid crystal molecules included in the light control layer 21 have positive dielectric anisotropy, for example. The dielectric constant in the major axis direction of the liquid crystal molecules is larger than the dielectric constant in the minor axis direction of the liquid crystal molecules. The liquid crystal molecules are, for example, Schiff base, azo, azoxy, biphenyl, terphenyl, benzoate, tolan, pyrimidine, cyclohexanecarboxylate, phenylcyclohexane, and dioxane liquid crystal molecules. is there.

  Each of the transparent electrode layers 23A and 23B is a transparent layer having conductivity. The material constituting each of the transparent electrode layers 23A and 23B is, for example, indium tin oxide (ITO), fluorine-doped tin oxide (FTO), tin oxide, zinc oxide, carbon nanotube (CNT), poly (3,4-ethylenedioxide). Oxythiophene) (PEDOT).

  Each support layer 24A, 24B is a colorless transparent base material or a colored transparent base material. Each support layer 24A, 24B is, for example, a glass substrate or a polymer film. Examples of the material constituting the polymer film include polyethylene, polystyrene, polyethylene terephthalate, polyvinyl alcohol, polycarbonate, polyvinyl chloride, polyimide, polysulfone, cycloolefin polymer, and triacetyl cellulose.

  The adhesive layer 50 is a colorless transparent layer or a colored transparent layer. The adhesive layer 50 may be composed of an adhesive that needs to be solidified when the target is adhered, or may be composed of an adhesive that does not require solidification when the target is adhered. For example, the adhesive layer 50 is made of an adhesive such as an acrylic resin or an epoxy resin.

  In the light control sheet 20, the state in which the drive voltage is not applied to the transparent electrode layers 23 </ b> A and 23 </ b> B is a non-drive state of the light control layer 21. In the light control sheet 20, a state in which a drive voltage is applied between the first transparent electrode layer 23 </ b> A and the second transparent electrode layer 23 </ b> B is a drive state of the light control layer 21.

  For example, the normal type light control sheet 20 scatters light incident on the light control sheet 20 by arranging the major axis directions of the liquid crystal molecules irregularly in the non-driven state. In the driving state, the normal type light control sheet 20 regularly arranges the major axis directions of the liquid crystal molecules and transmits light incident on the light control sheet 20. The light control region Si in the normal type light control sheet 20 is opaque in the non-driven state, but is transparent in the drive state.

  For example, the reverse-type light control sheet 20 arranges the major axis directions of the respective liquid crystal molecules so as to transmit light incident on the light control sheet 20 in a non-driven state. The reverse type light control sheet 20 arranges the major axis directions of the liquid crystal molecules so as to block the light incident on the light control sheet 20 in the driving state. The light control region Si in the reverse type light control sheet 20 is transparent in the non-driven state, but is opaque in the drive state.

  The first electrode sheet 22A is continuous from the light control region Si to the first connected region SA. The first electrode sheet 22A protrudes from the light control layer 21 and the second electrode sheet 22B in the first connected area SA and is exposed to the second space S2. 23 A of 1st transparent electrode layers have the surface 25a exposed to 2nd space S2 from the other layer of the light control sheet 20 in 1st to-be-connected area SA. The surface 25a is a surface facing the second space S2, and constitutes the surface of the light control sheet 20. The first connected area SA is an area in which the light control layer 21 and the second electrode sheet 22B are removed from the light control sheet 20.

  At the end of the light control region Si adjacent to the first connected region SA, the boundary between the first connected region SA and the light control region Si is the light control layer 21, the second transparent electrode layer 23B, and the second It is comprised from each end surface of the support layer 24B. The end surfaces of the light control layer 21, the second transparent electrode layer 23B, and the second support layer 24B are continuous along the thickness direction of the light control sheet 20, for example.

  30 A of 1st connection parts are located in 2nd space S2, and are connected to the surface 25a of 23 A of 1st transparent electrode layers. The first connecting portion 30A covers part or all of the surface 25a exposed in the second space S2. The first connection portion 30A includes a first conductive adhesive layer 31A, a first conductive tape 32A, a first solder portion 33A, and a first lead wire 34A.

  The first conductive adhesive layer 31A is bonded to the surface 25a of the first transparent electrode layer 23A. The first conductive tape 32A is bonded to a surface opposite to the surface bonded to the surface 25a in the first conductive adhesive layer 31A. The first conductive adhesive layer 31 </ b> A and the first conductive tape 32 </ b> A are located only on the surface 25 a and do not protrude beyond the end of the light control sheet 20 as viewed from the second space S <b> 2.

  33 A of 1st solder parts are located in the surface on the opposite side to the surface adhere | attached on 31 A of 1st conductive adhesive layers in the 1st conductive tape 32A. The first solder portion 33A is joined to the first conductive tape 32A and the first lead wire 34A. The first conductive tape 32A and the first lead wire 34A are electrically connected by the first solder portion 33A.

  The material for forming the first conductive adhesive layer 31A is, for example, a conductive paste such as a silver paste. For example, the first conductive adhesive layer 31A is a layer obtained by curing a conductive paste. The first conductive tape 32A is a tape containing a conductive material such as metal, and is, for example, a copper tape. 33 A of 1st solder parts are comprised from the well-known alloy material used as a solder. The first lead wire 34A is, for example, a coated copper wire.

  The first lead wire 34A is connected to the drive circuit. The first lead wire 34A, the first solder portion 33A, the first conductive tape 32A, and the first conductive adhesive layer 31A electrically connect the first transparent electrode layer 23A and the drive circuit. The drive circuit converts a voltage received from the external power source into a drive voltage, and applies the drive voltage to the first transparent electrode layer 23A through the first connection portion 30A.

  The second electrode sheet 22B is continuous from the light control region Si to the second connected region SB. The second electrode sheet 22B protrudes from the light control layer 21 and the first electrode sheet 22A in the second connected region SB and is exposed to the first space S1 and the second space S2. The second transparent electrode layer 23B has a surface 25b exposed to the first space S1 from the other layers of the light control sheet 20 in the second connected region SB. The front surface 25b is a surface facing the first space S1, and constitutes the back surface of the light control sheet 20. That is, the second connected region SB is a region in which the light control layer 21 and the first electrode sheet 22A are removed from the light control sheet 20.

  At the end of the light control region Si adjacent to the second connected region SB, the boundary between the second connected region SB and the light control region Si is the light control layer 21, the first transparent electrode layer 23A, and the first It is comprised from each end surface of 24 A of support layers. The end surfaces of the light control layer 21, the first transparent electrode layer 23A, and the first support layer 24A are continuous along the thickness direction of the light control sheet 20, for example.

  The second electrode sheet 22B includes a second conductive adhesive layer 31B, a second conductive tape 32B, an insulating adhesive layer 35B, and an end surface sealing portion 36B. The second conductive adhesive layer 31B and the second conductive tape 32B are examples of conductive layers. The second conductive adhesive layer 31B, the second conductive tape 32B, the insulating adhesive layer 35B, and the end surface sealing portion 36B are examples of folded portions.

  The second conductive adhesive layer 31B is bonded to the surface 25b of the second transparent electrode layer 23B. The insulating adhesive layer 35B is a second layer with respect to the second support layer 24B such that the insulating adhesive layer 35B and the second conductive adhesive layer 31B sandwich the second support layer 24B and the second transparent electrode layer 23B. Located on the space S2 side.

  The second conductive tape 32B is bonded to the surface opposite to the surface bonded to the surface 25b in the second conductive adhesive layer 31B. The second conductive tape 32B is bonded to the surface of the insulating adhesive layer 35B opposite to the surface bonded to the second support layer 24B.

  The second conductive tape 32B is bonded to the second conductive adhesive layer 31B and the insulating adhesive layer 35B. The second conductive tape 32B extends from the second conductive adhesive layer 31B to the insulating adhesive layer 35B through the outside of the end face of the second electrode sheet 22B. The second conductive tape 32B is folded at the end surface of the second electrode sheet 22B. That is, the second conductive tape 32B is located from the first space S1 side with respect to the second support layer 24B to the second space S2 side with respect to the second support layer 24B, and is exposed to the second space S2 in the second connected region SB. doing.

  The second conductive tape 32B includes a bent portion 37w. The bent part 37w is a bent part in the second conductive tape 32B. The bent portion 37w covers the end surface of the second support layer 24B as viewed from the second space S2, and is located outside the end surface of the second support layer 24B.

  The second conductive tape 32B includes an exposed portion 37t. The exposed portion 37t is a portion bonded to the insulating adhesive layer 35B in the second conductive tape 32B. The exposed portion 37t is affixed to the second support layer 24B through the insulating adhesive layer 35B. The exposed portion 37t has a surface 37s. Similarly to the surface 25a of the first transparent electrode layer 23A, the surface 37s of the exposed portion 37t is a surface facing the second space S2, and is exposed to the second space S2 to constitute the surface of the light control sheet 20.

  The end surface sealing portion 36B fills the gap between the end surface of the second support layer 24B and the bent portion 37w. The end surface sealing portion 36B makes the curvature at the bent portion 37w smaller than the end surface of the second support layer 24B, enlarges the radius of curvature at the bent portion 37w, and an excessive bending stress acts on the bent portion 37w. Suppress it.

  The second connection portion 30B is located in the second space S2, and is connected to the surface 37s of the exposed portion 37t. The second connection portion 30B includes a second solder portion 33B and a second lead wire 34B.

  The second solder portion 33B is located on the surface 37s of the exposed portion 37t. The second solder portion 33B is joined to the second conductive tape 32B and the second lead wire 34B. The second conductive tape 32B and the second lead wire 34B are electrically connected by the second solder portion 33B.

  The material for forming the second conductive adhesive layer 31B is, for example, a conductive paste such as a silver paste, similar to the first conductive adhesive layer 31A. The second conductive tape 32B is made of, for example, a copper tape, like the first conductive tape 32A. The second solder portion 33B is made of a known alloy material used as solder. Similar to the first lead wire 34A, the second lead wire 34B is, for example, a coated copper wire. The insulating adhesive layer 35B is composed of an adhesive or a pressure-sensitive adhesive. The insulating adhesive layer 35B is made of, for example, an acrylic resin. The end surface sealing portion 36B is made of, for example, an epoxy resin. The insulating adhesive layer 35B and the end surface sealing portion 36B are a single continuous member, and can be made of the same material.

  The second lead wire 34B is connected to the drive circuit. The second lead wire 34B, the second solder portion 33B, the second conductive tape 32B, and the second conductive adhesive layer 31B electrically connect the second transparent electrode layer 23B and the drive circuit. The drive circuit converts a voltage received from the external power source into a drive voltage, and applies the drive voltage to the second transparent electrode layer 23B through the second connection unit 30B.

  The dimming unit 10 includes a seal portion 51. The seal portion 51 fills a gap between the portion of the second conductive tape 32 </ b> B bonded to the second conductive adhesive layer 31 </ b> B and the transparent plate 200. The seal portion 51 also fills the gap between the second conductive adhesive layer 31B and the light control layer 21 and the gap between the second conductive adhesive layer 31B and the first electrode sheet 22A. The seal portion 51 also fills a gap between the second conductive tape 32B and the first electrode sheet 22A. The seal part 51 is made of, for example, an epoxy resin.

  Note that the adhesive layer 50 may be interposed between the transparent plate 200 and the second connected region SB. The adhesive layer 50 and the seal portion 51 can be configured as one continuous member.

[Manufacturing method of light control unit]
With reference to FIGS. 3-8, the manufacturing method of the light control unit 10 is demonstrated.
As shown in FIG. 3, first, the light control layer 21 is formed between the first electrode sheet 22A and the second electrode sheet 22B. Next, the multilayer sheet 27 including the first electrode sheet 22A, the light control layer 21, and the second electrode sheet 22B is cut in accordance with the shape of the transparent plate 200, for example.

  As shown in FIG. 4, the connected areas SA and SB are formed in the cut multilayer sheet 27. That is, in a part of the multilayer sheet 27, a part of the second electrode sheet 22B and a part of the light control layer 21 are removed to form the first connected area SA. Further, in a part of the multilayer sheet 27, a part of the first electrode sheet 22A and a part of the light control layer 21 are removed to form the second connected region SB. At this time, a part of each electrode sheet 22A, 22B is removed by cutting, for example. A part of the light control layer 21 is removed by wiping, for example.

  In the manufacturing method in which the first electrode sheet 22A is cut, the second electrode sheet 22B is cut, and the light control layer 21 is wiped after the multilayer sheet 27 is formed, from the viewpoint of simplifying the work, One connected area SA is preferably located at a corner of the multilayer sheet 27. The second connected region SB is also preferably located at a corner of the multilayer sheet 27.

  As shown in FIG. 5, the first conductive adhesive layer 31A is adhered to the exposed surface 25a of the first transparent electrode layer 23A. Next, the first conductive tape 32A is bonded to the first conductive adhesive layer 31A. The first conductive adhesive layer 31A and the first conductive tape 32A are located only on the surface 25a of the first transparent electrode layer 23A, and the first conductive tape 32A protrudes outside the end portion of the light control sheet 20. No.

  Further, the second conductive adhesive layer 31B is bonded to the exposed surface 25b of the second transparent electrode layer 23B. Next, the second conductive tape 32B is bonded to the second conductive adhesive layer 31B. The second conductive adhesive layer 31B is located only on the surface 25b of the second transparent electrode layer 23B, and the second conductive tape 32B extends from the surface 25b of the second transparent electrode layer 23B to the outside of the second support layer 24B. Yes.

  As shown in FIG. 6, a portion of the second conductive tape 32B that extends outside the second support layer 24B is folded back onto the second support layer 24B. The exposed portion 37t, which is a folded portion in the second conductive tape 32B, and the second support layer 24B constituting the surface of the light control sheet 20 are fixed by the insulating adhesive layer 35B. Further, the gap between the end surface of the second electrode sheet 22B and the bent portion 37w of the second conductive tape 32B is filled with the end surface sealing portion 36B.

  As shown in FIG. 7, the light control sheet 20 to which the conductive tapes 32 </ b> A and 32 </ b> B are bonded is attached to the transparent plate 200. That is, the first support layer 24 </ b> A is attached to the transparent plate 200 through the adhesive layer 50. The space between the second conductive tape 32 </ b> B and the transparent plate 200 is filled with a seal portion 51.

  As shown in FIG. 8, the first lead wire 34A and the first conductive tape 32A are connected on the surface 25a of the first transparent electrode layer 23A by the first solder portion 33A. Further, the second lead wire 34B and the second conductive tape 32B are connected on the surface of the light control sheet 20 by the second solder portion 33B. Thereby, the light control unit 10 is formed. In addition, the outer periphery of the light control sheet 20 on the transparent plate 200 can be further sealed with a sealing portion.

  Note that there is a limit to reducing the thickness of the connecting portion including the solder and the lead wire as in the conventional example shown in FIG. And in the structure where the 2nd connection part 30B is located between the 2nd electrode sheet 22B and the transparent plate 200, the 2nd connection part 30B will contact | abut to the transparent plate 200, and will push up the 2nd electrode sheet 22B. As a result, when the flexibility of the second electrode sheet 22B is low, the second electrode sheet 22B is locally bent, and the light control sheet 20 is distorted.

  In this regard, in the light control unit 10 described above, each of the solder portions 33A and 33B is not positioned between the light control sheet 20 and the transparent plate 200. Therefore, it is possible to suppress the local bending of the second electrode sheet 22 </ b> B and, consequently, the distortion of the light control sheet 110.

As described above, according to the first embodiment, the effects listed below can be obtained.
(1-1) The second solder portion 33B is not opposed to the transparent plate 200, like the first solder portion 33A, while being electrically connected to the second transparent electrode layer 23B directed to the transparent plate 200. Therefore, since the lead wire can be routed to the second space S2 in both the first connection portion 30A and the second connection portion 30B, the wiring route in the dimming unit 10 can be simplified.

  (1-2) Moreover, in any of the first connection part 30 </ b> A and the second connection part 30 </ b> B, it is possible to suppress the joint part with each lead wire from contacting the transparent plate 200. And since contact with the transparent plate 200 and each connection part 30A, 30B is avoided, it becomes possible to suppress the fall of the joint strength resulting from contact.

  (1-3) The operation for forming the first solder portion 33A and the operation for forming the second solder portion 33B can be performed in the second space S2. Therefore, the effort required for forming the first connection portion 30A and the effort required for forming the second connection portion 30B can be reduced.

  (1-4) The operation for forming the first solder part 33A and the operation for forming the second solder part 33B can be performed by the light control sheet 20 attached to the transparent plate 200. . That is, the operation of attaching the light control unit 10 to the transparent plate 200 can be performed prior to the formation of the connection portions 30A and 30B. For this reason, it is possible to suppress a decrease in the bonding strength at the first connection portion 30A due to a change in the arrangement of the dimming unit 10 and a decrease in the bonding strength at the second connection portion 30B.

  (1-5) The connected areas SA and SB can be provided by processing the light control sheet 20 cut out from the multilayer sheet 27. Therefore, the light control unit 10 can be manufactured by a manufacturing method excellent in productivity in which the large-sized multilayer sheet 27 is formed in advance.

  (1-6) The connected regions SA and SB are formed by removing a part of the light control layer 21, a part of the first electrode sheet 22A, and a part of the second electrode sheet 22B. Therefore, it is easy to mold the light control layer 21 and the electrode sheets 22A and 22B. Further, it is easy to adjust the sizes of the connected areas SA and SB and the positions of the connected areas SA and SB.

  (1-7) Since the second conductive tape 32B, which is a separate body from the second transparent electrode layer 23B, functions as a conductive layer, it is possible to adopt a shape and material specialized for folding as the conductive layer.

  (1-8) Since the end surface sealing portion 36B reduces the curvature of the second conductive tape 32B (bent portion 37w), excessive bending in the second conductive tape 32B can be suppressed. The stability of characteristics can also be improved.

[Modification of First Embodiment]
The first embodiment can be implemented with the following modifications. Note that the following modifications may be implemented in combination with each other as appropriate.
[Folding part]
The shape of the second conductive tape 32B can be changed as follows.
As shown in FIG. 10, the second conductive tape 32B is located on the inner side of the end portion of the second support layer 24B in the left-right direction in which the first connected area SA and the second connected area SB are aligned, It extends to the outside of the second support layer 24B in a direction orthogonal to the direction, and can be folded back at the lower end side of the second support layer 24B. That is, the direction in which the second conductive tape 32B is folded may be the minor axis direction of the second connected region SB, or may be the minor axis direction of the second conductive tape 32B.

  The exposed portion 37t can be arranged on the light control region Si in addition to the second connected region SB on the upper surface of the second support layer 24B. In addition, if the exposed part 37t is a structure which is not located in the light control area | region Si, the permeation | transmission and scattering of the light in the light control area | region Si are hard to be prevented by the exposure part 37t.

  -The 2nd electrode sheet 22B can abbreviate | omit the end surface sealing part 36B. In addition, if the 2nd electrode sheet 22B is the structure provided with the end surface sealing part 36B, since the excessive bending in the 2nd conductive tape 32B can be suppressed, the mechanical tolerance in the bending part 37w can be improved.

[Connected area]
The first connected area SA and the second connected area SB can be arranged along different sides in the light control sheet 20. That is, the first connection portion 30 </ b> A and the second connection portion 30 </ b> B can be arranged on different sides in the light control sheet 20. For example, the first connected area SA is arranged along the lower side of the light control sheet 20, while the second connected area SB is arranged along the right side of the light control sheet 20. The first connection portion 30 </ b> A is disposed along the lower side of the light control sheet 20, while the second connection unit 40 </ b> B is disposed along the right side of the light control sheet 20.

  In the configuration in which the first connected area SA and the second connected area SB are arranged along different sides, the degree of freedom of arrangement of the first connecting part 30A and the second connecting part 30B is increased. Therefore, the first connection portion 30A and the second connection portion 30B can be arranged according to the size of the light control sheet 20, and can be arranged according to the installation environment of the light control sheet 20.

  -At least one of 1st to-be-connected area | region SA and 2nd to-be-connected area | region SB can be arrange | positioned other than the corner | angular part of the light control sheet 20. FIG. For example, the first connected area SA is arranged at the center of the lower side of the light control sheet 20, and the second connected area SB is arranged at the center of the right side of the light control sheet 20.

  -At least one of the 1st to-be-connected area SA and the 2nd to-be-connected area SB can also be joined to a plurality of connecting parts. At this time, the plurality of connecting portions joined to the single connected region apply a common voltage to the single connected region.

[Configuration between areas]
-The light control sheet 20 can further be provided with the sealing part which fills the clearance gap between 31 A of 1st electroconductive contact bonding layers, and the light control layer 21 of the light control area | region Si. The light control sheet 20 can further include a sealing portion that fills a gap between the first conductive tape 32A and the light control layer 21 in the light control region Si. Each sealing portion reinforces the adhesion between the first conductive adhesive layer 31A and the first transparent electrode layer 23A and the adhesion between the first conductive adhesive layer 31A and the first conductive tape 32A. Moreover, each sealing part suppresses that the light control sheet | seat 20 is crushed at the edge part of the light control area | region Si, and the 1st transparent electrode layer 23A and the 2nd transparent electrode layer 23B short-circuit.

  The light control sheet 20 has the light control layer 21 at the end of the second electrode sheet 22B at the boundary between the light control region Si and the first connected region SA from the light control region Si to the first connected region SA. It is also possible to provide a region that protrudes beyond the part.

  The light control sheet 20 has the light control layer 21 at the boundary between the light control region Si and the second connected region SB from the light control region Si to the second connected region SB. It is also possible to provide a region that protrudes beyond the part.

[Production method]
The folding of the second conductive tape 32B may be performed after the light control sheet 20 is attached to the transparent plate 200. The connection between the first lead wire 34A and the first conductive tape 32A by the first solder portion 33A and the connection between the second lead wire 34B and the second conductive tape 32B by the second solder portion 33B are adjusted. It may be performed before the light sheet 20 is attached to the transparent plate 200.

(Second Embodiment)
With reference to FIGS. 11-18, 2nd Embodiment of a light control unit is described. Below, it demonstrates centering around the difference between 2nd Embodiment and 1st Embodiment, about the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

[Configuration of light control unit]
As shown in FIG. 11, the light control unit 10 includes a light control sheet 20, a first connection portion 40A, and a second connection portion 40B. The light control unit 10 is attached to the transparent plate 200.

  The light control sheet 20 has a rectangular planar shape when viewed from the second space S2. The light control sheet 20 is divided into a light control region Si, a first connected region SC, a second connected region SD, and an intermediate region Sr as viewed from the second space S2.

  The first connection portion 40A is connected to the first connected region SC. The second connection part 40B is connected to the second connected area SD. The first connected area SC is a rectangular area extending over the entire lower side of the light control sheet 20. The second connected area SD is a rectangular area located above the light control sheet 20 with respect to the first connected area SC. The intermediate region Sr is located between the first connected region SC and the second connected region SD. The first connected area SC, the intermediate area Sr, the second connected area SD, and the dimming area Si are arranged in order from the lower side of the light control sheet 20.

  The first connected area SC may be, for example, a rectangular area extending over the entire right side. The first connected area SC, the intermediate area Sr, and the second connected area are arranged in order from the right side of the light control sheet 20. SD and dimming area Si may be arranged. In other words, the first connected area SC may be a rectangular area along any side of the light control sheet 20, and the first connected area SC, the intermediate area Sr, and the second connected area in order from the side. Area SD and light control area Si are arranged.

  As shown in FIG. 12, the first electrode sheet 22A extends from the light control region Si to the first connected region SC through the second connected region SD and the intermediate region Sr. The surface of the first support layer 24 </ b> A opposite to the surface in contact with the first transparent electrode layer 23 </ b> A is attached to the transparent plate 200 through the adhesive layer 50.

  The back surface of the light control sheet 20 functions as a surface that is attached to the transparent plate 200. The back surface of the light control sheet 20 is a surface exposed to the first space S1, and is covered with the transparent plate 200 located in the first space S1. The surface of the light control sheet 20 is a surface opposite to the back surface. The surface of the light control sheet 20 is exposed to the second space S2.

  The light control layer 21 extends from the light control region Si to the intermediate region Sr through the second connected region SD. The second electrode sheet 22B extends from the light control region Si to the second connected region SD. The tip portion (folded portion 28t) of the second electrode sheet 22B is folded toward the second space S2 at the boundary portion between the second connected region SD and the intermediate region Sr and overlapped in the thickness direction.

  The light control layer 21 is sandwiched between the first electrode sheet 22A and the second electrode sheet 22B in the light control region Si. The laminate 26 includes a light control layer 21 between the first electrode sheet 22A and the second electrode sheet 22B. The second support layer 24B is the outermost layer closest to the second space S2 in the light control sheet 20 in the light control region Si. The surface of the second support layer 24B opposite to the surface in contact with the second transparent electrode layer 23B constitutes the surface of the light control sheet 20 in the light control region Si.

  The folded portion 28t is folded from the first space S1 side with respect to the second support layer 24B to the second space S2 side with respect to the second support layer 24B. In the second connected region SD, the folded portion 28t includes a second support layer 24B that doubles and a second transparent electrode layer 23B that doubles. The second support layer 24B in the folded portion 28t is an example of an extended support layer. The second transparent electrode layer 23B in the folded portion 28t is an example of an extended electrode layer.

  The second support layer 24 </ b> B of the folded portion 28 t is bonded via an insulating adhesive layer 29. The insulating adhesive layer 29 can suppress the second support layer 24B of the folded portion 28t from returning to the shape before folding. The insulating adhesive layer 29 constitutes the light control sheet 20. The second transparent electrode layer 23B in the folded portion 28t is integral with and electrically connected to the second transparent electrode layer 23B in the light control region Si on the first space S1 side with respect to the second support layer 24B.

  The folded portion 28t exposes the surface 25b of the second transparent electrode layer 23B to the second space S2. The surface 25b of the second transparent electrode layer 23B is a surface facing the second space S2 in the second connected region SD and constitutes the surface of the light control sheet 20. That is, the second connected region SD includes a portion of the light control sheet 20 from which the light control layer 21 and the first electrode sheet 22A are removed, and the second transparent electrode layer 23B of the folded portion 28t is the second It exposes to 2 space S2.

  The second connection portion 40B is located in the second space S2, and is connected to the surface 25b of the second transparent electrode layer 23B. The second connection portion 40B covers a part of the surface 25b exposed in the second space S2. The second connection portion 40B includes a second conductive adhesive layer 41B, a second conductive tape 42B, a second solder portion 43B, and a second lead wire 44B.

  The second conductive adhesive layer 41B is bonded to the surface 25b of the second transparent electrode layer 23B. The second conductive tape 42B is bonded to the surface opposite to the surface bonded to the surface 25b in the second conductive adhesive layer 41B.

  The second solder portion 43B is located on the surface of the second conductive tape 42B opposite to the surface bonded to the second conductive adhesive layer 41B. The second solder portion 43B is joined to the second conductive tape 42B and the second lead wire 44B. The second conductive tape 42B and the second lead wire 44B are electrically connected by the second solder portion 43B.

  The light control layer 21 protrudes from the second connected region SD to the intermediate region Sr. The light control layer 21 is covered with the sealing portion 45 in the intermediate region Sr. The sealing portion 45 is in contact with the second electrode sheet 22B located at the end portion of the second connected region SD. The sealing portion 45 covers the entire light control layer 21 located in the intermediate region Sr and contacts the first electrode sheet 22A on the first connected region SC side with respect to the light control layer 21. The sealing part 45 constitutes the light control sheet 20.

  The light control layer 21 located in the intermediate region Sr suppresses the first transparent electrode layer 23A and the second transparent electrode layer 23B from being short-circuited at the end of the second connected region SD. The sealing portion 45 covers the light control layer 21 located in the intermediate region Sr and suppresses deterioration of the light control layer 21. Moreover, the sealing part 45 fixes the 2nd electrode sheet 22B located in the edge part of 2nd to-be-connected region SD, and maintains the attitude | position of the folding | turning part 28t.

  The first transparent electrode layer 23A protrudes from the light control layer 21 and the second electrode sheet 22B in the first connected region SC and is exposed to the second space S2. 23 A of 1st transparent electrode layers have the surface 25a exposed to 2nd space S2 from the other layer of the light control sheet 20 in 1st to-be-connected area | region SC. The surface 25a is a surface facing the second space S2, and constitutes the surface of the light control sheet 20. The surface 25a of the first transparent electrode layer 23A faces in the same direction as the surface 25b of the folded portion 28t.

  The first connection portion 40A is located in the second space S2, and is connected to the surface 25a of the first transparent electrode layer 23A. 40 A of 1st connection parts cover a part of surface 25a exposed to 2nd space S2. The first connection portion 40A includes a first conductive adhesive layer 41A, a first conductive tape 42A, a first solder portion 43A, and a first lead wire 44A.

  The first conductive adhesive layer 41A is bonded to the surface 25a of the first transparent electrode layer 23A. In the first conductive adhesive layer 41A, the first conductive tape 42A is bonded to the surface opposite to the surface bonded to the first transparent electrode layer 23A.

  The first solder portion 43A is located on the surface of the first conductive tape 42A opposite to the surface in contact with the first conductive adhesive layer 41A, and is bonded to each of the first conductive tape 42A and the first lead wire 44A. Has been. That is, the first conductive tape 42A and the first lead wire 44A are connected by the first solder portion 43A.

  It is preferable that the sealing part 45 fills the gap between the light control layer 21 and the first connection part 40A. According to this structure, it is suppressed that the 2nd transparent electrode layer 23B contacts the 1st transparent electrode layer 23A and the 1st connection part 40A, and a short circuit arises.

  The material for forming the first conductive adhesive layer 41A and the second conductive adhesive layer 41B is, for example, a conductive paste such as a silver paste. The first conductive tape 42A and the second conductive tape 42B are tapes containing a conductive material such as a copper tape, for example. The first solder part 43A and the second solder part 43B are made of a known alloy material used as solder. The first lead wire 44A and the second lead wire 44B are, for example, coated copper wires. The insulating adhesive layer 29 is composed of an adhesive or an adhesive. The insulating adhesive layer 29 is made of, for example, an acrylic resin. Moreover, the sealing part 45 is comprised from an epoxy resin, for example.

[Manufacturing method of light control unit]
With reference to FIGS. 13-16, the manufacturing method of the light control unit 10 is demonstrated.
As shown in FIG. 13, first, the light control layer 21 is formed between the first electrode sheet 22A and the second electrode sheet 22B. Next, the multilayer sheet 27 including the first electrode sheet 22A, the light control layer 21, and the second electrode sheet 22B is cut in accordance with the shape of the transparent plate 200, for example.

  The multilayer sheet 27 is affixed to the transparent plate 200 via the adhesive layer 50. Next, the insulating adhesive layer 29 is bonded to the end of the surface of the second support layer 24B opposite to the surface in contact with the second transparent electrode layer 23B.

  As shown in FIG. 14, the end portion of the second electrode sheet 22 </ b> B to which the insulating adhesive layer 29 is bonded is folded back, and the second support layers 24 </ b> B are bonded together by the insulating adhesive layer 29. Thereby, the folding | returning part 28t is formed and the surface 25b of the 2nd transparent electrode layer 23B is exposed.

  As shown in FIG. 15, the portion exposed from the second electrode sheet 22 </ b> B in the light control layer 21 is removed leaving a part. Specifically, when viewed from the direction facing the surface of the multilayer sheet 27, the portion exposed from the second electrode sheet 22 </ b> B is removed except for the portion adjacent to the folded portion 28 t in the light control layer 21. . In other words, a part of the light control layer 21 is left so as to protrude from the folded portion 28 t when viewed from the direction facing the surface of the multilayer sheet 27. For example, the remaining portion of the light control layer 21 is masked, and the unmasked portion is removed by wiping with alcohol or the like.

  Thereby, the light control region Si in which only the stacked body 26 is located, the second connected region SD in which the folded portion 28t is attached to the stacked body 26, the intermediate region Sr in which the light control layer 21 is exposed, the first A first connected region SC in which the transparent electrode layer 23A is exposed is formed. Thereby, the light control sheet 20 which has said each area | region is formed.

  As shown in FIG. 16, the first conductive adhesive layer 41A is bonded to the exposed surface 25a of the first transparent electrode layer 23A, and the first conductive tape 42A is bonded to the first conductive adhesive layer 41A. Further, the second conductive adhesive layer 41B is bonded to the exposed surface 25b of the second transparent electrode layer 23B, and the second conductive tape 32B is bonded to the second conductive adhesive layer 31B. Then, soldering is performed, and the first lead wire 44A and the first conductive tape 42A are connected by the first solder portion 43A in a region on the surface 25a of the first transparent electrode layer 23A. Further, the second lead wire 44B and the second conductive tape 42B are connected by the second solder portion 43B in a region on the surface 25b of the second transparent electrode layer 23B. Further, the sealing portion 45 is formed so as to cover the light control layer 21 exposed in the intermediate region Sr. Thereby, the light control unit 10 is formed. In addition, the sealing part may be formed in the outer periphery of the light control sheet 20 on the transparent plate 200 as needed.

As mentioned above, according to 2nd Embodiment, in addition to the effect according to said (1-1)-(1-8), the effect enumerated below is acquired.
(2-1) The second electrode sheet 22B is folded, and the surface 25b of the folded portion 28t and the surface 25a of the first transparent electrode layer 23A face the second space S2. Therefore, since the lead wire can be routed to the second space S2 in both the first connection portion 30A and the second connection portion 30B, the wiring route in the dimming unit 10 can be simplified.

(2-2) Since the contact between the transparent plate 200 and each of the connection portions 30A and 30B can be avoided, it is possible to suppress a decrease in the bonding strength of the wiring due to the contact.
(2-3) The operation of turning back the second electrode sheet 22B and the operation of removing a part of the light control layer 21 can be performed from the second space S2. Therefore, the work required for connecting the connection portions 40A and 40B can be performed collectively from the second space S2. The light control unit 10 can be easily formed, and the manufacturing efficiency of the light control unit 10 can be improved.

  (2-4) Since the connected regions SC and SD can be formed without cutting the electrode sheets 22A and 22B, the load required for partial removal of the electrode sheets 22A and 22B can be reduced.

[Modification Example of Second Embodiment]
The second embodiment can be implemented with the following modifications. Note that the following modifications can be implemented in combination as appropriate.
[Connected area]
The first connected area SC and the second connected area SD can be arranged along different sides in the light control sheet 20. For example, in FIG. 11, the first connected region SC (first connection portion 40A) is arranged on the right side of the light control sheet 20, and the second connected region SD (second connection portion 40B) is the light control sheet 20. Can be placed on the left side of As shown in FIG. 17, the first connection portion 40A is located on the left side of the center in the left-right direction in the first connected region SC, while the second connection portion 40B is connected to the second connected region SD. It is also possible to be located on the right side of the center in the left-right direction. Further, as shown in FIG. 18, the first connection portion 40A and the second connection portion 40B can be located on the right side of the center in the left-right direction.

  Each connected area SC, SD can be arranged only in a part of one side of the light control sheet 20. For example, each of the connected areas SC and SD can be arranged only on the right side from the center of the lower side of the light control sheet 20.

  The light control sheet 20 can omit the intermediate region Sr and make the first connected region SC and the second connected region SD adjacent to each other. That is, the light control layer 21 may not protrude from the second connected region SD toward the first connected region SC. In this case, the light control sheet 20 can include a second electrode sheet 22B positioned at the end of the second connected region SD and a sealing portion that covers the end surface of the light control layer 21.

  -At least one of the 1st to-be-connected region SC and the 2nd to-be-connected region SD can also be joined to a plurality of connecting parts. At this time, the plurality of connecting portions joined to the single connected region apply a common voltage to the single connected region.

[Production method]
The formation of each connected area SC, SD, that is, the folding of the second electrode sheet 22B and the removal of the light control layer 21 may be performed before the multilayer sheet 27 is attached to the transparent plate 200. In addition, the connection between the first lead wire 44A and the first conductive tape 42A by the first solder portion 43A and the connection between the second lead wire 44B and the second conductive tape 32B by the second solder portion 43B are also adjusted. It may be performed before the light sheet 20 is attached to the transparent plate 200.

[Modification of each embodiment]
The first embodiment, the second embodiment, and the modified examples of each embodiment can be implemented with the following modifications.
The light control sheet 20 can include other functional layers in addition to the light control layer 21 and the electrode sheets 22A and 22B.

  The other functional layers include, for example, a function of protecting the light control layer 21, a function of protecting the transparent electrode layers 23A and 23B, a function of increasing the heat resistance of the light control sheet 20, and a light control sheet, such as a barrier layer. 20 has a function of increasing weather resistance. Further, the other functional layer has a function that contributes to control of light transmittance in the light control sheet 20, such as an alignment film.

  In addition, when the light control sheet 20 is provided with layers other than the light control layer 21 and each electrode sheet 22A, 22B, in 1st to-be-connected area | region SA and SC, the surface of 1st transparent electrode layer 23A is another layer. It is sufficient that the first connecting portions 30A and 40A are connected to each other. Further, in the second connected region SB in the first embodiment, the surface of the second transparent electrode layer 23B may be exposed from other layers, and the conductive adhesive layer 31B of the second connection portion 30B may be bonded. .

-The light control layer 21 is a pigment | dye which has a predetermined color, Comprising: The pigment | dye which does not prevent the orientation control of the liquid crystal molecule by a drive voltage can be contained.
The transparent plate 200 can be arranged in at least one of the first space S1 and the second space S2. Then, at least one of the front surface and the back surface of the light control sheet 20 can be attached to the transparent plate 200. Also in these structures, the effect according to said (1-1), (1-5)-(1-8), (2-1), (2-3), (2-4) is acquired.

  The connection between the first transparent electrode layer 23A and the first connection portion 30A is not limited to the removal of the light control layer 21 and the second electrode sheet 22B, and, for example, penetrates the light control layer 21 and the second electrode sheet 22B. It can be changed to a connection through a hole. In addition, for example, the connection between the first transparent electrode layer 23A and the first connection portion 30A is performed by drawing the conductive tape placed between the first transparent electrode layer 23A and the light control layer 21 onto the second electrode sheet. It can be changed to different forms.

  The connection between the second transparent electrode layer 23B and the second connection portion 30B is not limited to the formation of the folded portion, and can be changed to, for example, a connection through a hole penetrating the second support layer 24B. In addition, for example, the connection between the second transparent electrode layer 23B and the second connection portion 30B is such that the conductive tape placed between the second transparent electrode layer 23B and the light control layer 21 is drawn over the second electrode sheet. It can be changed to different forms.

  In short, the first connection part 30A and the second connection part 30B are located in the second space S2, the first connection part 30A and the first electrode sheet 22A are connected, and the second connection part 30B and the second connection part 30B. What is necessary is just the structure to which the electrode sheet 22B is connected.

  S1 ... 1st space, S2 ... 2nd space, SA, SC ... 1st connected area, SB, SD ... 2nd connected area, Si ... Dimming area, 10 ... Dimming unit, 20, 110 ... Dimming Sheet, 21 ... Light control layer, 22A ... First electrode sheet, 22B ... Second electrode sheet, 23A ... First transparent electrode layer, 23B ... Second transparent electrode layer, 24B ... Second support layer, 28t ... Folding part, 29, 35B ... Insulating adhesive layer, 30A, 40A ... first connection part, 30B, 40B ... second connection part, 32A, 32B ... conductive tape.

Claims (6)

A light control sheet that divides a space into a first space and a second space, wherein the light control layer includes a first electrode sheet having a first transparent electrode layer in an order closer to the first space, and a liquid crystal composition. And a second electrode sheet having a second transparent electrode layer, the light control sheet in which the light control layer is located between the first transparent electrode layer and the second transparent electrode layer,
A first connection part located in the second space for connecting the first transparent electrode layer and the wiring;
A second connection part for connecting the second transparent electrode layer and the wiring located in the second space;
A dimming unit comprising The light control sheet is divided into a first connected region, a light control region, and a second connected region as seen from the second space,
The first transparent electrode layer is exposed to the second space in the first connected region and connected to the first connection part,
The second electrode sheet includes a second support layer, the second transparent electrode layer positioned on the first space side with respect to the second support layer, and the second space layer on the first space side with respect to the second support layer. A folded portion including a conductive layer electrically connected to the transparent electrode layer,
The conductive layer is folded from the first space side with respect to the second support layer to the second space side with respect to the second support layer, exposed to the second space in the second connected region, and exposed to the second space. The dimming unit according to claim 1, wherein the dimming unit is connected to two connecting portions. The conductive layer includes a conductive tape separate from the second transparent electrode layer, covers an end surface of the second support layer, and from the first space side with respect to the second support layer, to the second support layer. The light control unit according to claim 2, wherein the light control unit is folded back toward the second space. The said folding | returning part is equipped with the end surface sealing part which fills between the end surface of the said 2nd support layer, and the said conductive tape, and makes the curvature in the said conductive tape smaller than the end surface of the said 2nd support layer. The light control unit described in 1. The folded portion is a tip portion of the second electrode sheet, and includes an extended support layer integral with the second support layer, and an extended electrode layer integral with the second transparent electrode layer,
The light control unit according to claim 2, wherein the conductive layer is the extended electrode layer. The light control unit according to claim 5, wherein the extended support layer is folded twice and bonded by an insulating adhesive layer.

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