JP2019045669A - Lighting control body - Google Patents

Abstract

To solve a problem such that due to high wiring resistance of a transparent conductive film, an effective voltage applied to a lighting control layer in an area separated from a power supply position decreases and a degree of light scattering (transmittance) for each area does not become uniform based on difference in applied voltage, so as to achieve a uniform degree of light scattering (transmittance) in a sheet in response to the applied voltage even when an area of the light control sheet is large.SOLUTION: Wiring composed of at least one material selected from a group consisting of copper, silver, aluminum, nickel, and an alloy thereof is configured to be electrically connected on a transparent conductive film. A width of the wiring is equal to or less than 10 μm, and an occupation area ratio of the wiring is equal to or less than 5% of the transparent conductive film.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a light control body including an optical element that controls a light transmission state by electrical control, and in particular, a transparent light control body of a type that drives a liquid crystal element sandwiched by a transparent substrate with a transparent electrode layer. The present invention relates to a dimmer having an improved electrode layer.

  In the following description, various terms such as a light control body, a light control device, a light control sheet, and a light control film may be used together. This is because the transparent base material is a rigid base material such as a glass plate or an acrylic plate, a flexible resin film, or a flexible light control film to ensure thickness and rigidity. It is a difference with the final form resulting from being fixed (or in the form of sandwiched laminated glass). In the present application, these are treated as synonyms.

  A light control sheet that switches between an opaque state (or cloudy state) and a transparent state is used in various applications.

For example, the light control sheet includes a liquid crystal layer held between the electrodes, changes the alignment state of the liquid crystal molecules contained in the liquid crystal layer by the voltage applied to the electrodes, and scatters the incident light and the incident light. It is configured to be able to switch between a transparent state that transmits transmitted light. (For example, see Patent Document 1)
The light control sheet can be used not only for buildings but also for windows (railways, buses, ships, aircraft), exhibition windows, partitions, etc. by fixing to a transparent substrate such as glass. It becomes. For example, a dimming sheet has been proposed as a suitable product for use as an automobile sunroof or sun visor, in addition to facilities for separating a space, for example, for separating a private space and a public space.

  As a liquid crystal element using a liquid crystal material, a TN (Twisted Nematic) mode has been put into practical use. In this mode, light is switched by utilizing the optical rotation characteristics of the liquid crystal, and when used as a liquid crystal element, it is necessary to use a polarizing plate. However, the use efficiency of light becomes low by using a polarizing plate. As a liquid crystal element with high light utilization efficiency without using a polarizing plate, there is a liquid crystal element that performs switching between a liquid crystal transmission state (also referred to as a transparent state) and a scattering state. As the liquid crystal element, generally, a polymer dispersed liquid crystal (PDLC) in which liquid crystal molecules are dispersed in a polymer, or a polymer network made of a resin formed in a three-dimensional network. There is known one using a polymer network type liquid crystal (PNLC) having liquid crystal molecules arranged in voids formed in the substrate. In both PDLC and PNLC, part or all of the liquid crystal composition containing a polymerizable compound that is polymerized by ultraviolet rays exhibits liquid crystallinity. And both PDLC and PNLC are manufactured through the process of hardening the said liquid-crystal composition by ultraviolet irradiation, and forming the hardened | cured material composite body of a liquid crystal and a polymeric compound.

  Two types of normal mode and reverse mode are known for the light control film using the liquid crystal element as a light control layer, depending on its usage. The normal mode is a mode in which a transmission state is obtained by applying voltage (ON) and a scattering state is obtained by removing voltage (OFF). The reverse mode is a mode in which a transmission state is obtained by voltage removal (OFF) and a scattering state is obtained by voltage application (ON).

  If a transparent conductive film such as ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), or an organic conductive film is used as the electrode of the light control sheet, the wiring resistance increases, voltage gradient is generated on the electrode surface, and the light control is driven. When the area of the sheet is increased, it is necessary to increase the driving voltage. Here, the electrical resistance of ITO and copper takes the following values.

ITO: 1.5-22.0 × 10 ⁻⁴ [Ωcm]
Copper: 1.68 × 10 ⁻⁷ [Ωcm]
As described above, the electrical resistance value of the transparent conductive film is remarkably higher than that of a highly conductive metal such as copper, and the sheet resistance value is generally 80 to 500Ω / □ for ITO, and in terms of driving voltage. In other cases, an external input voltage 70 (V) is required to maintain the internal effective voltage 20 (V).

  FIG. 7 is an explanatory diagram illustrating an example of the entire light control sheet 10 including a power feeding unit (electrode terminal).

  The transparent conductive film sandwiches a light control layer in a state where a transparent conductive film formed by forming a transparent electrode made of a transparent conductive material on a film substrate is opposed to each other.

  For the transparent substrate constituting the transparent conductive film, a polyethylene terephthalate (PET) film, a polyethylene (PE) film, a polycarbonate (PC) film, or the like can be used. The thickness of the transparent substrate is desirably about 50 to 200 μm.

  A metal oxide such as ITO is generally used for the transparent electrode (transparent conductive film), but a low-resistance conductive polymer may be employed instead of ITO. As the conductive polymer, it is preferable to employ a material containing a polyanion doped with a π-conjugated conductive polymer exemplified by PEDOT / PSS. A suitable thickness of the transparent electrode is about 80 nm or more and 150 nm or less.

  FIG. 7 (a) relates to a configuration in which a transparent electrode (transparent conductive film) is formed in a solid form on the entire surface of a film base material in a use / form in which display (transmission / scattering) of the entire light control sheet is switched. It is explanatory drawing.

  In applications and forms where the entire surface is switched at once, the two transparent conductive films sandwiching the liquid crystal element are configured to have a transparent electrode (transparent conductive film) formed in a solid form on the entire surface of the film substrate. Since the electrode size is large, the problem of voltage gradient on the electrode surface becomes significant.

  In applications and forms where the display (transmission / scattering) is switched selectively for each region instead of the entire surface, at least one transparent electrode (transparent conductive film) is divided into regions, and a power feeding unit is provided for each divided region. (Electrode terminal) is required.

  One transparent electrode (transparent conductive film) is divided into regions, and the other is a light control sheet comprising a transparent conductive film having a solid electrode (transparent conductive film) on the entire surface (display switching by driving is selective) An example of this configuration is shown in FIGS.

  FIG. 2 is a graph illustrating the value of the straight transmittance of the light control sheet for each distance from the power feeding position with respect to the voltage applied from one end of the electrode of the light control sheet. In this example, it is assumed that the straight-line transmittance of the light control sheet changes in three stages including a halftone (transparent / halftone / white turbidity).

  In the figure, an example of a change in the straight transmittance with respect to the applied voltage in the region of the light control sheet closest to the feeding position is shown by a solid line. An example of a change in the straight transmittance with respect to the applied voltage in the region of the light control sheet is shown by a broken line a, a broken line b, and a broken line c in order from the power feeding position.

  According to the example shown in the figure, the straight transmission with respect to the power supply voltage is lower as the region is farther from the power supply position of the light control sheet. This is because a voltage drop occurs due to the wiring resistance of the transparent conductive film, and the effective voltage applied to the light control layer decreases in a region far from the feeding position.

  As described above, in the normal mode, it is necessary to increase the driving voltage in order to drive the entire area of the light control sheet having a large area to be transparent, and it is difficult to keep the driving power low. . Therefore, it is difficult to ensure the uniformity of the transmittance (transparency) of the entire surface of the light control sheet having a large area, and the quality of the light control module may be deteriorated.

  In a large-area light control sheet, as the wiring resistance of the transparent conductive film is high, the light scattering degree (transmittance) for each region becomes uniform based on the difference in driving voltage according to the distance from the feeding position. The same phenomenon occurs when the light control sheet is in the reverse mode.

An example of a phenomenon showing non-uniformity inherent in the reverse mode will be described below. Note that the liquid crystal element is not a PDLC or PNLC in which transmission-scattering is switched, but an explanation relating to a TN mode optical switching element in which transmission-shielding is switched.
(1) Unevenness during light shielding (voltage ON) FIG. 3 is a diagram in which the transparent conductive films (drive electrodes) 11 to 18 of the light control sheet 10 are divided into eight vertically long strips in the screen (view area). FIG. 6 is an explanatory diagram showing an example of a defect when a voltage is applied in order to put the light control elements in all eight regions into a light-shielding state.

The effective voltage in the transparent conductive film (drive electrode = liquid crystal cell) in 8 regions cannot follow the frequency of the drive waveform (signal waveform becomes dull), and the liquid crystal cell corresponding to each transparent conductive film (drive electrode) 11-18 When the voltage application sufficient to sufficiently charge the liquid crystal molecules in the entire region is not performed, white defects 21 to 28 occur in the central portion of each liquid crystal cell as illustrated.
(2) Unevenness during Transmission (Voltage OFF) FIG. 4 is an explanatory diagram showing a defect example when the voltage is released in order to set the light control element 10 having the same configuration as in FIG. 3 to the transmission state.

  Due to the asymmetry of the drive waveform, the DC voltage component (residual DC voltage) generated in the liquid crystal cells corresponding to the transparent conductive films (drive electrodes) 11 to 18 generates “burn-in” as shown in the figure. Defects 31 to 38 are generated in the periphery of each liquid crystal cell where the application of voltage is not released and a portion in a light-shielded state remains (impurity ions in the cell are deeply involved in the generation of the residual DC voltage. Are known).

  In order to ensure the uniformity of transmissivity (transparency) over the entire surface, measures to increase (or change) the location where the power feeding part is formed, or to reduce the wiring resistance (sheet resistance) of the transparent conductive film It is considered.

  The improvement plan of the formation part of the power feeding part will be described. In the conventional light control sheet, the power feeding part of both the front and back substrates (both formed with a transparent conductive film) sandwiching the liquid crystal layer is on the same side of the sheet. And the other power feeding part have electrode terminals, respectively, and when the electrode terminal of each power feeding part and an external circuit are electrically connected, the power feeding parts of both the front and back substrates are not formed. On the opposite side, the problem of uniformity in the transmittance (transparency) according to the separation distance from the power supply unit is remarkable, so an example of adopting a method in which one of the front and back substrates is formed on the opposite side is also seen. It is done.

  In this method, the power feeding part (electrode terminal) to the transparent conductive film is arranged on the end side, and the number of work steps for connecting the electrode terminal and the commercial power source increases, and the number of routing wires increases. As a result, problems such as a disadvantage in the appearance (design) of the light control sheet due to an increase in the bezel (frame, outer frame) and a restriction in the installation of the light control sheet occur.

  The improvement measures by lowering the wiring resistance (sheet resistance) of the transparent conductive film will be explained. By increasing the thickness of ITO, it is possible to reduce the sheet resistance value of the transparent conductive film and suppress the voltage drop. In addition to the increase in the amount of use of the light, the quality of the light control sheet is deteriorated due to the appearance problems such as a decrease in the transmittance of the light control sheet and an increase in coloring (yellowishness) due to ITO. (Transparency when transparent is reduced).

JP 2014-146051 A

  In the present invention, due to the high wiring resistance of the transparent conductive film, the effective voltage applied to the light control layer in the region away from the feeding position is reduced, and the light for each region is based on the difference in the applied voltage. To solve the problem that the degree of scattering (transmittance) is not uniform, and to provide a uniform light scattering degree (transmittance) in the sheet according to the driving voltage, even if the light control sheet has a large area. With the goal. By extension, it aims at providing the light control sheet which contributes to the fall of the drive voltage-power consumption of a light control sheet.

The dimmer of the present invention is
In the light control body in which the light control layer capable of switching the haze in two or more steps according to the applied voltage is sandwiched between the transparent base materials on which the transparent conductive film for applying the voltage to the light control layer is formed.
On the transparent conductive film, a wire wiring made of at least one material selected from the group consisting of copper, silver, aluminum, nickel and alloys thereof is electrically connected,
The wiring width of the wire wiring is 10 μm or less, and the occupation area ratio of the wire wiring in the transparent conductive film is 5% or less.

  In the present invention, the transparent conductive film formed on at least one transparent substrate may have a configuration in which a plurality of regions are divided in one direction.

  Moreover, it is also preferable to arrange the wire wiring so as to be formed around the boundary portion of the transparent conductive film divided into regions.

  In order to reduce the wiring resistance (sheet resistance) of the transparent conductive film, it is not necessary to increase (or change) the formation part of the power supply unit, or to increase the thickness of the transparent conductive film. By adopting a configuration in which a wire wiring made of a material selected from copper, silver, and aluminum is electrically connected to and supported by a transparent conductive film having a high wiring resistance, it can be used in a region away from the feeding position. Dimming with a large area can be achieved by eliminating the problem of non-uniform light scattering (transmittance) for each region based on the difference in applied voltage. Even in the case of a sheet, the light scattering degree (transmittance) in the sheet can be made uniform according to the driving voltage. Thereby, the light control sheet which contributes to the fall of the drive voltage-power consumption of a light control sheet is provided.

Explanatory drawing which shows the structural example of the transparent conductive film in the light control body by this invention. The graph which illustrates the value of the straight transmission factor of the light control sheet with respect to the voltage applied from the end of the electrode of a light control sheet for every distance from a feeding position. Explanatory drawing which shows the example of a defect at the time of applying a voltage to the transparent conductive film (drive electrode) of the light control sheet of a prior art. Explanatory drawing which shows the example of a defect when a voltage application is cancelled | released to the transparent conductive film (drive electrode) of the light control sheet of a prior art. Explanatory drawing which shows the structural example (other example) of the transparent conductive film in the light control body by this invention. Explanatory drawing which shows various support forms of the transparent conductive film by the metal wiring (wire mesh) of a low electrical resistance. Explanatory drawing which shows an example of the whole light control sheet containing an electric power feeding part (electrode terminal). (Conventional technology)

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following drawings and descriptions. FIG. 1 is an explanatory diagram conceptually showing the structure of a transparent conductive film in a light control member according to an embodiment of the present invention. As shown in FIG. 1, the transparent conductive films (drive electrodes) 11 to 16 of the light control body 10 are divided into six vertically long strips in a screen (view area). FIG. 1A is a diagram illustrating a drive electrode that is formed of a transparent conductive film such as ITO, IZO, or an organic conductive film and is divided into regions. FIG. 1B is a diagram showing a state in which wirings 41 to 46 made of a material selected from copper, silver, and aluminum are electrically connected and supported around the drive electrode shown in FIG.

  In the edge portion of each drive electrode shown in FIG. 1B, a metal wiring having a low electrical resistance may be provided so as to continuously conduct around each drive electrode. Further, the border portions (41 to 46) may be mesh-like bands having a certain width. In any case, the width of the wire constituting the wiring is desirably a thin wire of 10 μm or less.

  FIG. 5 is a schematic configuration diagram showing a transparent conductive film in a light control body according to another embodiment of the present invention. The transparent conductive films (drive electrodes) 11 to 16 of the light control body 10 are horizontally long in the screen (view area). The structure is divided into six strips. The difference from FIG. 1 is that wiring (wire mesh) 50 made of a material selected from copper, silver, and aluminum covers the screen (view area). It is in the point.

  The configuration of FIG. 5 is a structure in which an opaque metal wiring directly covers the liquid crystal layer in which the “transmission-scattering” state change is realized. For this reason, consideration in making the wire wiring 50 as difficult to see as possible is more important. Therefore, in this embodiment, the line width of the wire wiring is limited to a thinness of 10 μm, and the occupied area ratio of the wire wiring in the effective screen in the state where the dimmer is used is suppressed to 5% or less.

  One of the objectives of the electrical support function of the transparent conductive film with low electrical resistance metal wiring is to eliminate unevenness in the light scattering degree (transparency) that accompanies the voltage drop according to the separation distance from the feeding position of the drive electrode. is there. However, the support function is effective even if each transparent conductive film (drive electrode) divided into regions in the screen (view area) has a small size that has little influence on the voltage drop.

  In FIG. 5, wiring (wire mesh) 50 formed on individual transparent conductive films (drive electrodes) 11 to 16 divided into regions of six horizontally long strips is disconnected between the divided regions and electrically Insulated (51-56). However, the wire mesh structure shown in FIG. 5 is more effective in the case of a large-area transparent conductive film that is not divided into regions and whose entire surface functions as a single drive electrode.

  As described above, the greatest adverse effects of the mixed wiring are the hiding of the display screen and the glare of metal reflection.

  Even if measures are taken to conceal the display screen based on the wire wiring width and the occupied area ratio, there still remains a problem that the pattern due to the fine metal wire is easy to see due to the light reflection peculiar to the metal. Therefore, it is desirable that the surface reflection of the wiring using metal as a forming material is suppressed (non-reflection treatment, blackening treatment) to make it difficult to be visually recognized.

  For example, when the wire wiring is formed of copper (Cu), the surface of the copper wiring is formed by wet treatment using various chemicals so that a dark hue such as black, blue, green, etc. is exhibited after the copper wiring is formed. Can be considered.

  In addition, it is effective to form a copper oxynitride layer (CuNO) having a reflectance lower than that of the copper layer on at least one of the upper and lower sides of the copper layer instead of a single layer copper wiring.

  FIG. 6 is an explanatory view showing various support forms of the transparent conductive film by the metal wiring (wire mesh) 50 with low electrical resistance.

  In FIG. 6A, the wire mesh 50 (51 to 57) is uniformly arranged on the entire surface of the transparent conductive film divided into regions, and FIG. 5B shows a constant width around each transparent conductive film divided into regions. The mesh-shaped belts 51 to 57 are arranged (similar to FIG. 1B), and FIG. 10C is an illustration of a form in which the wire meshes 51 to 54 are arranged on a part of each transparent conductive film divided into regions. is there.

  In any form, a wire mesh is appropriately disposed in order to eliminate a voltage drop corresponding to the distance from the feeding position of the drive electrode. Accordingly, it is necessary to electrically connect the conductive wire mesh for the separation distance in which the influence of the voltage drop occurs on the transparent conductive film.

  In this invention, it is set as the light control body of the structure which clamped the light control layer with the illustrated transparent conductive film. The light control layer is a type of PNLC (polymer network liquid crystal) in which liquid crystal molecules are arranged in voids formed inside a polymer network made of resin formed in a three-dimensional network, or dispersed in a polymer. Any type of PDLC (polymer dispersed liquid crystal) having liquid crystal molecules to be used is employed.

Hereinafter, this embodiment will be described by using PNLC as a representative.
<Dimmer by PNLC>
In the production of a light control body (film) comprising a light control layer made of PNLC, a mixture of liquid crystal and a photopolymerizable compound (monomer) is used for a pair of transparent electrode substrates (transparent substrate on which a transparent conductive film is formed). A polymer that has an infinite number of fine domains (polymer voids) due to photopolymerization and cross-linking through photopolymerization and photopolymerization of the photopolymerizable compound that changes to a polymer by UV irradiation under certain conditions. A network forms in the liquid crystal.

  The driving voltage of PNLC generally depends on the structural characteristics of the polymer network (domain size and shape, film thickness of the polymer network, etc.), and the relationship between the structure of the polymer network and the obtained light transmission / scattering degree , The drive voltage is determined.

  In order to construct a PNLC in which sufficient light transmission / scattering degree can be obtained in a voltage region of 100 V or less, each domain should be uniform in size and uniform in size. It is necessary to form a polymer network.

  In the present invention, the domain size depending on the polymer network structure is controlled to be 3 μm or less, preferably 2 μm or less, and more preferably 0.3 to 1.7 μm.

  The light control body according to the present embodiment includes a light control layer made of PNLC and a transparent conductive film (a transparent substrate on which a transparent conductive film is formed). The transparent conductive film sandwiches the light control layer (PNLC) and applies a voltage to the light control layer (PNLC) to change the high haze (scattering state) and the low haze (transmission state).

  The transparent conductive film sandwiches a light control layer with a transparent conductive film formed by forming a transparent electrode made of a transparent conductive material on a film base so that the transparent electrode sides face each other.

  For the transparent substrate constituting the transparent conductive film, a polyethylene terephthalate (PET) film, a polyethylene (PE) film, a polycarbonate (PC) film, or the like can be used. The thickness of the transparent substrate is desirably about 50 to 200 μm.

  A metal oxide such as ITO is generally used for the transparent electrode (transparent conductive film), but a low-resistance conductive polymer may be employed instead of ITO. As the conductive polymer, it is preferable to employ a material containing a polyanion doped with a π-conjugated conductive polymer exemplified by PEDOT / PSS.

  A suitable thickness of the transparent electrode is about 80 nm or more and 150 nm or less.

  In PNLC, it is also possible to express a halftone haze state other than transparent (low haze) and opaque (high haze) according to the applied voltage.

  In addition to the normal mode method in which the voltage changes from the light scattering (white turbidity) system to the transparent state by applying a voltage (ON), the present invention changes the reverse mode method in which the state changes from transparent to white turbid system by applying voltage. It is also applicable to.

  In a light control body comprising a reverse type light control layer (PNLC), an alignment film is laminated between the transparent conductive films on the upper side of the light control layer and also between the transparent conductive films on the lower side of the light control layer. An alignment film is stacked (not shown).

  The polymer network and the liquid crystal molecules are disposed between the pair of alignment films.

  The alignment film is a so-called vertical alignment film, and aligns the liquid crystal molecules so that the longitudinal direction of the liquid crystal molecules is along the normal direction of the alignment film when no voltage is applied to the light control layer 2. For this reason, the reverse type light control layer (PNLC) is in a low haze state when no voltage is applied, and has high transparency.

  The main feature of the present invention is the electrical resistance support of the transparent conductive film in a large transparent conductive film (transparent substrate on which the transparent conductive film is formed).

  In laminating to patterning a low electrical resistance metal on a transparent conductive film, a method of laminating via a conductive adhesive layer after patterning the metal surface of a film provided with metal foil, metal plating, and sputtered film, Uses, shapes, etc., such as a method of patterning a metal layer formed directly on a transparent conductive film by a photolithography method, a method of cutting a conductive tape having a conductive adhesive layer on a copper foil and pasting it into a desired shape Depending on the situation, it can be adopted appropriately.

  When the transparent conductive film is a large-area electrode formed in a solid shape over the entire surface of the light control body, the transparent conductive film is supported by the low electrical resistance wire wiring inside the view area on the transparent conductive film. It is also required that the wire wiring with opaque and metallic luster is visually recognized by the user, and care must be taken so as not to cause discomfort and discomfort.

  In the light control body in which the switching between transparent and light scattering is executed as a kind of “display”, concealment of the display screen due to mixed wiring and glare of metal reflection are the greatest adverse effects.

  In order to assist the high electrical resistance of the transparent conductive film without making the wire wiring visible as much as possible, it is necessary to make the wire wiring thin and reduce the occupation area ratio in the dimmer screen.

  The wire wiring width is desirably 10 μm or less, and the occupied area ratio of the wire wiring on the transparent conductive film is desirably 5% or less.

  In terms of visual characteristics, it is natural that the thinner the wire wiring width and the lower the occupied area ratio, the better. However, it is difficult to manufacture (patterning of wire wiring) and exhibit low electrical resistance characteristics. In consideration of the feasibility in the case (it is meaningless if wire breakage or electrical support is insufficient), a certain lower limit is set.

  As an experience limit by the present inventors, in the case of the patterning method by the subtractive method of Cu foil and Cu plating (sputtering), the wire wiring width is 3 μm or more, and the occupied area ratio of the wire wiring is 2% or more of the transparent conductive film area Is necessary.

  In the method of patterning a metal layer formed directly on a transparent conductive film by photolithography, a wire wiring in which a low resistance metal is later patterned on the surface of a transparent electrode (transparent conductive film) formed on a transparent conductive film A metal layer to be formed is formed.

  For example, the metal layer may be a layer selected from the group consisting of copper, silver, aluminum, nickel, and alloys thereof, for example, physical vapor deposition methods such as vacuum deposition, sputtering, and ion plating ( PVD method), chemical vapor deposition method (CVD method), liquid phase growth method such as plating method, metal foil produced by rolling or the like, or a combination of these two or more. be able to.

 Wire wiring that supports the high electrical resistance of the transparent conductive film on the transparent conductive film by patterning this metal layer to have a desired auxiliary electrode (wire wiring) pattern using a known photolithography technique Is formed.

10 Dimmers 11 to 18 Transparent conductive film (drive electrode)
21-28 Defects (white spots)
31-38 Defect (burn-in)
41 to 46 Wiring (border)
50-57 wire wiring (worker mesh)

Claims (3)

In the light control body in which the light control layer capable of switching the haze in two or more steps according to the applied voltage is sandwiched between the transparent base materials on which the transparent conductive film for applying the voltage to the light control layer is formed.
On the transparent conductive film, a wire wiring made of at least one material selected from the group consisting of copper, silver, aluminum, nickel and alloys thereof is electrically connected,
The wiring width of the said wire wiring is 10 micrometers or less, and the occupation area ratio in the said transparent conductive film of the said wire wiring is 5% or less, The light control body characterized by the above-mentioned.   The light control body according to claim 1, wherein the transparent conductive film formed on at least one of the transparent base materials is divided into a plurality of regions along a certain direction.   The said light wiring is formed in the circumference | surroundings which correspond to the boundary part of the said transparent conductive film divided | segmented into the area | region, The light control body of Claim 2 characterized by the above-mentioned.