JP6958070B2 - Dimming film, dimming member, vehicle - Google Patents

Description

The present invention, light control film, light control member, to drive both.

Some liquid crystal display devices used in liquid crystal televisions and the like use fluorescent lamps as backlights. In such a liquid crystal display device, "moire (interference fringes)" may occur due to interference between the lighting cycle of the fluorescent lamp by the inverter and the data scanning cycle for driving the liquid crystal. Conventionally, in order to eliminate this "moiré", there is a technique of synchronizing the lighting cycle by the inverter and the data scanning cycle (see Patent Documents 1 and 2).
Similarly, as a film using a liquid crystal display, there is a dimming film that is attached to the sunroof of a vehicle to control the transmission of external light. The photochromic film changes the orientation of the liquid crystal by changing the voltage applied to the liquid crystal, and changes the amount of external light transmitted.

Japanese Unexamined Patent Publication No. 5-341262 Japanese Unexamined Patent Publication No. 6-160804

When the amount of external light incident on the light control film of the sunroof of a vehicle changes periodically like the emitted light of a fluorescent lamp, or when "flicker" is observed in the transmitted light of the light control film. There is.
The present invention, flicker hardly is recognized when observing the external light through the light control film, light control films, and an object thereof is to provide a light adjusting member and vehicles including the same.

One embodiment of the present invention includes a planar transparent electrode arranged on a base material and provided with a feeding point connected to a drive power source, and an electric wiring electrically connected to the transparent electrode. The feeding point is provided at the outer edge portion of the transparent electrode, and the electrical wiring extends from the feeding point along the outer edge portion of the base material, and is a connection point provided at a position different from the feeding point. Provided is a light control film that is electrically connected to a transparent electrode.

The base material includes a first base material and a second base material, and the transparent electrodes are a first transparent electrode arranged on the first base material and a second transparent electrode arranged on the second base material. The first base material and the second base material are arranged so that the first transparent electrode and the second transparent electrode face each other with a liquid crystal display sandwiched between them. A first exposed surface that does not overlap with the second base material is formed on the surface on the side of the second base material, and the surface on the side of the first base material of the second base material overlaps with the first base material. It is preferable that a second exposed surface is formed so that the electrical wiring is arranged on the first exposed surface and the second exposed surface.

The base material includes a first base material and a second base material, and the transparent electrodes are a first transparent electrode arranged on the first base material and a second transparent electrode arranged on the second base material. The first base material and the second base material are arranged so that the first transparent electrode and the second transparent electrode face each other with a liquid crystal display sandwiched between the first base material and the second base material. The second base material is laminated so as to form a laminated region that overlaps with each other and an exposed surface that does not overlap with each other, and a liquid crystal display and a sealing material arranged so as to surround the liquid crystal display are arranged in the laminated region. A first exposed region that does not include the first transparent electrode is present in a portion of the first base material on which the sealing material is arranged, and the sealing material of the second base material is arranged. It is preferable that the portion has a second exposed region that does not include the second transparent electrode.

It is preferable that a part of the second transparent electrode is insulated from the other part and the part is electrically connected to the first transparent electrode.

The electrical wiring is preferably a flexible printed substrate having a copper foil thickness of 9 microns or more.

In the flexible printed substrate, it is preferable that two layers of copper foil are laminated via an insulating layer.

The electrical wiring preferably extends along two sides extending in different directions starting from the feeding point.

Another embodiment of the present invention provides a dimming member including a transparent member and a dimming film arranged on the transparent member.
Another embodiment of the present invention provides a vehicle comprising a dimming film arranged at a location where external light is incident.

Another embodiment of the present invention is a method of feeding a light control film including a planar transparent electrode provided with a feeding point connected to a drive power source and an electric wiring electrically connected to the transparent electrode. The present invention provides a method for supplying power to the transparent electrode from the feeding point provided at the outer edge of the transparent electrode and a connection point provided at a position different from the feeding point.

According to the present invention, it flickers hardly is recognized when observing the external light through the light control film, light control films, it is possible to provide a light control member and vehicles including the same.

It is a figure which shows the vehicle which uses the light control film of embodiment. It is sectional drawing explaining the basic structure of the light control film of embodiment. It is a graph which shows the relationship between the driving voltage and the transmittance in a light control film. This is the measurement result of the amount of external light from the emitted light of the fluorescent lamp. It is a graph which shows the frequency of the transmitted light when the external light of the external light frequency 100Hz is transmitted through the light control film of the transmittance frequency 43Hz. It is a graph which showed the state of the change of the voltage when the polarity of the voltage applied to the light control film is reversed. In the comparative form, it is a simulation result showing the potential distribution of the transparent electrode when a driving voltage of 10 V with a frequency of 60 Hz is applied. (A) is the potential distribution of the lower transparent electrode, and (b) is the potential distribution of the upper transparent electrode. Is shown. As a comparative form, FIG. 7 is a graph showing the relationship between the distance from the feeding point P0 and the potential of the transparent electrode. It is a comparative form, and shows the electric field between the upper transparent electrode and the lower transparent electrode under the same conditions as in FIG. It is a comparative form, and is the graph which showed FIG. 9 by the distance from the feeding point P0 and the electric field strength. It is a top view of the light control film of 1st Embodiment. When the thickness of the copper foil of the FPC is 35 μm and the frequency of the driving voltage is 240 Hz, the voltage between the two transparent electrodes is shown. Indicates the potential of the electrode. It is a figure which showed the electric field generated between the upper laminated body and the lower laminated body when the thickness of the copper foil of FPC is 35 μm, and the frequency of the driving voltage of the rectangular wave supplied from a power source is 240 Hz. .. When the thickness of the copper foil of the FPC is 35 μm and the frequency of the driving voltage of the rectangular wave supplied from the power supply is different, the potential difference between the upper transparent electrode and the lower transparent electrode and the distance from the feeding point The relationship is shown. It is a figure which showed the relationship between the distance from a feeding point and a potential difference in 1st Embodiment and 2nd Embodiment. The relationship between the potential difference between the upper transparent electrode and the lower transparent electrode and the distance from the feeding point when the thickness of the copper foil of the FPC is 9 μm and the frequency of the voltage supplied from the power supply is different is shown. , FIG. 14 is a diagram corresponding to FIG. It is a top view of the light control film of the 3rd Embodiment, (a) is a figure explaining the patterning shape of the upper transparent electrode, (b) is a figure explaining the patterning shape of the lower transparent electrode. It is an enlarged view of the region S surrounded by the alternate long and short dash line in FIG. 17A. It is a flowchart which shows the manufacturing process of a light control film 1A. It is a top view of the light control film of 4th Embodiment, (a) is a figure explaining the patterning shape of the upper transparent electrode, (b) is a figure explaining the patterning shape of the lower transparent electrode. It is an enlarged view of the region S surrounded by the alternate long and short dash line of FIG. 20, and is the figure explaining the patterning shape of the upper and lower transparent electrodes. FIG. 2 is a cross-sectional view taken along the line AB of FIG. 21. It is a top view of the light control film of the modified form 2. It is a top view of the light control film of 5th Embodiment. It is a figure explaining the patterning shape of the upper and lower transparent electrodes at the connection point P1.

〔vehicle〕
FIG. 1 is a diagram showing a vehicle 130 including a sunroof 132 to which the light control film 1 of the embodiment is attached. The vehicle 130 is provided with an opening 131 to which the sunroof 132 is attached so as to cover the passenger's head. A laminated body of the light control film 1 is arranged in the opening 131 to form a sunroof 132. However, the method of attaching the light control film 1 of the present invention is not limited to the case of attaching the light control film 1 to the sunroof, and the show window and other windows (for example, the front window, the side window, and the rear window) which are the portions where the outside light is incident in the vehicle are used. , Roof window, sun visor, etc.), window glass of buildings, showcases, indoor transparent partitions, etc., which can also be applied to dimmable parts.

In the vehicle 130 of the present embodiment, the driver's seat is arranged at the front right side of the vehicle, and the sunroof 132 is provided so as to cover from the front seat such as the driver's seat to the rear seat as shown in FIG. ing. Further, the light control film 1 is used as a laminated body in which a transparent member forming the sunroof 132 is laminated with an adhesive, an adhesive or the like. Not limited to this, the light control film 1 may be sandwiched between laminated glass (transparent member). Further, as the transparent member, glass, a transparent resin substrate, or the like can be used.

[Basic configuration of dimming film]
FIG. 2 is a cross-sectional view illustrating the basic configuration of the light control film 1 according to the embodiment. The light control film 1 is a film-like member that controls transmitted light using a liquid crystal, and is configured by sandwiching a liquid crystal cell 4 for a light control film between linear polarizing plates 2 and 3.

[Linear polarizing plate]
The linear polarizing plates 2 and 3 are obtained by impregnating polyvinyl alcohol (PVA) with iodine or the like and then stretching the linear polarizing plates 2 or 3 to form an optical functional layer that functions as a linear polarizing plate, such as TAC (triacetyl cellulose). It is produced by sandwiching an optical functional layer with a base material made of a transparent film material. The linear polarizing plates 2 and 3 are arranged in the liquid crystal cell 4 by an adhesive layer such as an acrylic transparent adhesive resin by the cross Nicol arrangement. The linear polarizing plates 2 and 3 are provided with retardation films 2A and 3A for optical compensation on the liquid crystal cell 4 side, respectively, but the retardation films 2A and 3A may be omitted if necessary. ..

[LCD cell]
The liquid crystal cell 4 is configured by sandwiching the liquid crystal layer 8 between the film-shaped lower laminated body 5D and the upper laminated body 5U.

[Lower laminate, Upper laminate]
The lower laminated body 5D is formed by forming a lower transparent electrode (second transparent electrode) 11, a spacer 12 and an alignment layer (lower alignment layer) 13 on a base material (lower base material) 6 made of a transparent film material. Will be done. The upper laminated body 5U is formed by laminating an upper transparent electrode 16 (first transparent electrode) and an alignment layer (upper alignment layer) 17 on a base material (upper base material) 15 made of a transparent film material. In this embodiment, as will be described later, as shown in the figure, the lower transparent electrode 11 and the upper transparent electrode 16 have slightly different aspect ratios, and their side sides 5DS and 5DU are arranged so as to be offset from each other. ..

In the present embodiment, the lower transparent electrode 11 is provided on the entire surface of the base material 6, and the upper transparent electrode 16 is provided on the entire surface of the base material 15, so that the lower transparent electrode 11 and the base material 6 are different from each other. The upper transparent electrode 16 and the base material 15 have the same shape.
Further, in the present embodiment, the contact layer 6a is provided on the surface of the base material 6 on the lower transparent electrode 11 side, and the contact layer 15a is provided on the surface of the base material 15 on the upper transparent electrode 16 side.
The adhesion layers 6a and 15a are formed of an inorganic substance, an organic substance, or a mixture thereof. As the inorganic substance, SiO _X (x = 1 to 2), MgF ₂ , Al ₂ O ₃ , TiO ₂ , Nb ₂ O _{5, and the} like are preferable. Examples of the organic substance include acrylic resin, urethane resin, melamine resin, alkyd resin, and siloxane-based polymer, and it is preferable to use a thermosetting resin composed of a mixture of melamine resin, alkyd resin, and organic silane condensate.
The method for producing the adhesion layers 6a and 15a is a dry process such as a vacuum vapor deposition method, a sputtering method, or an ion plating method, or a wet method (coating method).
The adhesion layers 6a and 15a are one layer or a plurality of layers having two or more layers, and the overall thickness is preferably about 1 to 300 nm.

〔Base material〕
Various transparent film materials can be applied to the base materials 6 and 15, but it is desirable to apply a film material having a small optical anisotropy. In the present embodiment, a polycarbonate film having a thickness of 100 μm is applied to the base materials 6 and 15, but film materials having various thicknesses can be applied, and further, a COP (cycloolefin polymer) film or the like is applied. You may.

[Transparent electrode]
The lower transparent electrode 11 and the upper transparent electrode 16 are planar, and various electrode materials applied to this type of film material can be applied. In this embodiment, the transparent electrode material is made of ITO (Indium Tin Oxide). Is formed by.

〔Spacer〕
The spacer 12 is provided to define the thickness of the liquid crystal layer 8, and various resin materials can be widely applied. In the present embodiment, the photospacer is made of a photoresist and is made by coating, exposing, and developing a photoresist on a base material 6 on which the lower transparent electrode 11 is made. The spacer 12 may be provided on the upper laminated body 5U, or may be provided on both the upper laminated body 5U and the lower laminated body 5D. Further, the spacer 12 may be provided on the alignment layer 13. Further, as the spacer, a so-called bead spacer may be applied.

[Orientation layer]
The alignment layers 13 and 17 are formed by a photo-alignment layer. As the photo-alignment material applicable to this photo-alignment layer, various materials to which the photo-alignment method can be applied can be widely applied, but in the present embodiment, for example, a photodimerization type material is used. For this photodimerized material, see "M. Schadt, K. Schmitt, V. Kozinkov and V. Chigrinov: Jpn. J. Appl. Phys., 31, 2155 (1992)", "M. Schadt, H. Seeberle and A. Schuster: Nature, 381, 212 (1996) and the like. Instead of the photo-alignment layer, the alignment layer may be prepared by rubbing treatment, or the alignment layer may be prepared by shaping a fine line-shaped uneven shape.

[Liquid crystal layer]
As the liquid crystal layer 8, various liquid crystal layer materials applicable to this type of light control film 1 can be widely applied. Specifically, as the liquid crystal layer 8, a liquid crystal material such as MLC2166 manufactured by Merck & Co., Inc. can be applied. A guest host type liquid crystal may be used as the liquid crystal layer 8. In the liquid crystal cell 4, a sealing material 19 is arranged so as to surround the liquid crystal layer 8, and the upper laminated body 5U and the lower laminated body 5D are integrally held by the sealing material 19, and leakage of the liquid crystal material is prevented. Here, for example, an epoxy resin, an ultraviolet curable resin, or the like can be applied to the sealing material 19.

[Drive power supply]
The drive power supply 20 applies a drive voltage of a rectangular wave whose polarity is switched at regular time intervals between the lower transparent electrode 11 and the upper transparent electrode 16 of the light control film 1. The lower transparent electrode 11 and the upper transparent electrode 16 are provided with feeding points, which will be described later. When a drive voltage is applied from the drive power source 20 to the feeding point, an electric field is generated in the liquid crystal layer 8. The orientation of the liquid crystal layer material provided on the liquid crystal layer 8 is controlled by the electric field generated in the liquid crystal layer 8. As a result, the transmitted light of the dimming film 1 can be controlled, and dimming can be achieved.

A VA method (Vertical Orientation type) or the like is applied to the orientation control of the liquid crystal layer 8 in the light control film 1 of the embodiment. In the VA method, when the amplitude of the drive power supply 20 is 0 V (when the drive voltage is 0 V), the liquid crystal molecules of the liquid crystal layer 8 are vertically aligned when there is no electric field, whereby the dimming film 1 shields the incident light. Then, it becomes a light-shielded state. Further, when the amplitude of the drive power source 20 is increased to raise the drive voltage, the liquid crystal layer of the liquid crystal layer 8 is horizontally aligned, and the light control film 1 transmits the incident light.
However, instead of the VA method, various drive methods such as a TN (Twisted Nematic) method and an IPS (In Plane Switching) may be applied.
In the present embodiment, the liquid crystal cell 4 is driven by a so-called single domain.

[Fluctuation of transmittance]
FIG. 3 is a graph showing the relationship between the drive voltage and the transmittance in the light control film 1.
As shown in the figure, a driving voltage having a rectangular waveform whose polarity is switched at regular time intervals is applied from the driving power source 20 between the lower transparent electrode 11 and the upper transparent electrode 16 of the light control film 1.
When the polarity of the drive voltage is reversed, charging / discharging of the liquid crystal layer between the lower transparent electrode 11 and the upper transparent electrode 16 to the capacitance is executed. The time required for charging and discharging varies depending on the capacitance of the light control film, the resistance values of the lower transparent electrode 11 and the upper transparent electrode 16, and the connection method from the power supply, but in the example of FIG. 2, the time constant is about 1 millisecond. Then, charge and discharge. The larger the area of the light control film, the larger the capacitance, the resistance value of the electrode is difficult to be smaller than a predetermined value, and the time constant is difficult to be extremely shortened.
Therefore, the voltage applied to the liquid crystal layer 8 temporarily decreases, and as a result, the electric field acting on the liquid crystal molecules decreases momentarily. As a result, the liquid crystal layer molecules of the liquid crystal layer temporarily change their directions in conjunction with the decrease in the electric field, and then return to the original state. As a result, the transmittance of the light control film 1 temporarily decreases. That is, the transmittance of the light control film 1 is not constant, but fluctuates at the same first frequency (hereinafter, referred to as the transmittance frequency), which is the same as the frequency of the change in the driving voltage.

[Flickering due to the relationship between external light and transmittance fluctuation]
In this way, when the light control film 1 whose transmittance fluctuates at a predetermined transmittance frequency transmits external light whose amount of light fluctuates at a second frequency (hereinafter referred to as an external light frequency), the transmittance frequency and the outside are transmitted. Depending on the relationship with the light frequency, "flicker" may be observed in the light transmitted through the light control film 1. Here, the flicker is perceived by the brightness and darkness of the light, so that it is difficult to recognize that the change in the amount of light is small in the amount of transmitted light. In addition, flicker is generally difficult to recognize if the frequency is 30 Hz or higher.

[External light frequency]
FIG. 4 shows the measurement result of the amount of external light generated by the emitted light of the fluorescent lamp. When the fluorescent lamp is driven by a commercial power source having a frequency of 50 Hz, the fluorescent lamp discharges in the pipe every half cycle of the commercial power source. Then, the phosphor emits light by this in-tube discharge to emit the emitted light, so that the emitted light whose amount of light changes substantially in a sinusoidal manner with a frequency of 100 Hz is emitted. As a result, the amount of external light from the fluorescent lamp changes depending on the frequency of 100 Hz, but since the frequency is 30 Hz or higher, in this case, it is not recognized as flicker.

In recent years, the brightness of LED lighting fixtures and the like, which are often used as lighting, is controlled by pulse width modulation. Pulse width modulation has a large change in the amount of light and is easily recognized as flicker. LED lighting fixtures and the like are also driven by a frequency of 100 Hz or higher, which is a frequency higher than 30 Hz.
The frequency of external light from a luminaire that changes due to such driving is referred to as an external light frequency in the present specification.

[Transmittance frequency]
On the other hand, if the frequency of the drive voltage of the light control film 1 (the same frequency as the transmittance frequency) is high, the transmittance drops every time the polarity is switched, so that the average transmittance decreases. Therefore, the frequency of the drive voltage (transmittance frequency) is not as high as the external light frequency, and is preferably 30 Hz or higher. In FIG. 4, the transmittance frequency is 43 Hz. When the transmittance frequency is set to 30 Hz or higher in this way, it is possible to prevent the transmitted light from flickering due to a change in the transmittance of the light control film itself.

FIG. 5 is a graph showing the frequency of transmitted light when external light having an external light frequency of 100 Hz is transmitted through a light control film 1 having a transmittance frequency of 43 Hz. As shown in the figure, the amount of transmitted light changes according to the same frequency as the external light frequency when viewed microscopically, but each peak due to this external light frequency pulsates according to the transmission frequency, and as a result, An interference wave having a third frequency (hereinafter referred to as an interference light frequency) having a wavelength of 0.075 seconds (13 Hz) is generated. Since the interference light frequency of 13 Hz is lower than the limit frequency of 30 Hz, which makes it difficult for flicker to be recognized, it is recognized as flicker.

[Relationship with feeding point]
FIG. 6 is a graph showing how the voltage changes when the polarity of the voltage applied to the light control film 1 is reversed. The relationship between the elapsed time and the voltage when a voltage of 10 V is applied when the time constant is 10 μsec, 0.1 msec, and 1 msec is shown.
As shown in the figure, when the time constant is about 1 msec, the voltage is lower than 10 V for a long time, that is, the voltage rises slowly. As described above, the more gradual the voltage rises, the larger the amount of drop (the level at which the voltage drops) in the transmittance of the light control film 1 when the voltage fluctuates. The transmittance in FIG. 6 indicates the fluctuation of the transmittance when the time constant is 1 msec.

[Comparison form]
First, in order to facilitate the description of the embodiments described below, the comparative embodiment will be described first.
FIG. 7 is a diagram illustrating a comparative form. In the comparative form, as shown by an arrow in the figure, a feeding point P0 is provided at one of the four corners of the rectangular light control film 1. A voltage is supplied to the two lower transparent electrodes 11 and the upper transparent electrode 16 of the liquid crystal cell 4 of the light control film 1 from one of the feeding points P0.
FIG. 7 is a simulation result showing the potential distribution of the transparent electrode when a driving voltage of 10 V having a frequency of 60 Hz is applied. FIG. 7A shows the potential distribution of the lower transparent electrode 11, and FIG. 7B shows the potential distribution of the upper transparent electrode 16. The potential distribution of is shown. The transparent electrode is ITO and has a thickness of 100 nm, and the size of the light control film is 1.2 (m) × 0.8 (m).
FIG. 8 is a graph showing the relationship between the distance from the feeding point P0 and the potential of the transparent electrode in FIG. 7. A indicates the potential of the upper transparent electrode 16, and B indicates the potential of the lower transparent electrode 11.
FIG. 9 shows the electric field between the upper transparent electrode 16 and the lower transparent electrode 11 under the same conditions as in FIG. 7. FIG. 10 is a graph showing FIG. 9 in terms of the distance from the feeding point P0 and the electric field strength. ..

In the comparative form, as shown in the figure, the voltage closer to the feeding point P0 is higher, and the voltage becomes smaller as the distance from the feeding point P0 increases. Even if a voltage of 10 V is applied to the feed point P0, the voltage at the point P3, which is a position diagonal to the feed point P0, is about 6.5 V in the example of FIG. 7 (see FIG. 15 described later). That is, the time constant at the time of polarity reversal of the drive voltage is also longer when it is far from the feeding point P0, and the transmittance tends to drop significantly. Therefore, in the comparative form, the transmittance fluctuates greatly in the portion far from the feeding point P0, and flicker is easily recognized.

[First Embodiment]
FIG. 11 is a plan view of the light control film 1 of the first embodiment. Also in the first embodiment, as in the comparative embodiment, as shown by the arrows in the figure, the feeding point P0 is provided at one of the four corners of the rectangular light control film 1. ing. A voltage is supplied to the two lower transparent electrodes 11 and the upper transparent electrode 16 of the liquid crystal cell 4 of the light control film 1 from the feeding point P0.
Then, as shown in FIGS. 11 and 2, in the present embodiment, the lower transparent electrode 11 and the upper transparent electrode 16 have different sizes.
That is, the longitudinal length LU of the upper transparent electrode 16 is longer than the longitudinal length LD of the lower transparent electrode 11, and the lateral length WU of the upper transparent electrode 16 is the lateral length of the lower transparent electrode 11. Directional length shorter than WD.

The two lower transparent electrodes 11 and the upper transparent electrodes 16 having different shapes are arranged so that their central axes coincide with each other. Then, of the four side sides of the upper transparent electrode 16, the upper first side side 5UL extending in the longitudinal direction (first direction) from the feeding point P0 and the four side sides of the lower transparent electrode 11 are fed. It is separated from the lower first side side 5DL extending in the longitudinal direction from the point P0, for example, by about 2 mm while maintaining a parallel relationship with each other. It is not necessary to be strictly parallel.

Then, of the four side sides of the upper transparent electrode 16, the upper second side side 5US extending from the feeding point P0 in the lateral direction (second direction) and the four side sides of the lower transparent electrode 11 are fed. It is separated from the lower second side side 5DS extending in the lateral direction from the point P0 by, for example, about 2 mm while maintaining a parallel relationship with each other.

As a result, in the upper transparent electrode 16, an exposed surface (first exposed surface) 5u facing the lower transparent electrode 11 side is formed at the edge portion extending from the feeding point P0 to P2 along the lateral direction.
Further, in the lower transparent electrode 11, an exposed surface (second exposed surface) 5d facing the upper transparent electrode 16 side is formed at an edge extending from the feeding point P0 to P1 along the longitudinal direction.

From the drive power supply 20, an FPC (flexible printed substrate) 21 extends to a feeding point P0 of the lower transparent electrode 11 and the upper transparent electrode 16, and at this feeding point P0, the lower transparent electrode 11 and the upper transparent electrode 16 Is electrically connected to.
In the FPC21, two layers of copper foil are laminated via an insulating layer, and one of the two layers of copper foil laminated at the feeding point P0 is a transparent electrode (for example, an upper transparent electrode). It is arranged to be electrically connected and the other copper foil is arranged to be electrically connected to the other transparent electrode (eg, the lower transparent electrode). Then, the FPC 21 is branched into FPC 21a and 21b in two directions from the feeding point P0. The FPCs 21a and 21b may be separately manufactured and connected to the FPC21, or the two FPCs 21a and 21b manufactured and connected separately may be connected to the FPC21. Extending along the exposed surface 5d, the FPC21b extends along the exposed surface 5u.

In the present embodiment, the surface of the copper foil is further covered with a coverlay, and the FPC 21 has a five-layer structure in which the coverlay, the copper foil, the insulating layer, the copper foil, and the coverlay are arranged in this order in the thickness direction. I am using something. The laminated structure of the FPC 21 is not limited to this, and may be appropriately selected and used. For example, a form in which three or more layers of copper foil are laminated via an insulator in the thickness direction may be used.

The FPCs 21a and 21b are fixed with tape or the like. However, the present invention is not limited to this, and it may be attached with an adhesive.
Then, the FPCs 21a and 21b extend along the outer edges of the base materials 6 and 15, respectively, and at the connection points P1 and P2 provided at the corners adjacent to the feeding point P0, the lower transparent electrode 11 and the upper transparent electrode 16 It is electrically connected. At this time, the FPC 21a and FPC 21b are arranged so that one of the two layers of copper foil laminated at the corresponding connection point is electrically connected to one transparent electrode (for example, the upper transparent electrode). The other copper foil is arranged so as to be electrically connected to the other transparent electrode (for example, the lower transparent electrode).
The FPCs 21a and 21b are not electrically connected to the electrodes except for the feeding points P0 and the connection points P1 and P2 provided at the adjacent corners thereof.
That is, the FPCs 21a and 21b are not continuously electrically connected to the lower transparent electrode 11 and the upper transparent electrode 16 on a surface (line), but are electrically connected to a plurality of points (feeding point and connecting point) at predetermined intervals. It is connected.

In the embodiment, the FPC 21a is electrically connected to the lower transparent electrode 11 and the upper transparent electrode 16 at two points, the feeding point P0 and the connection point P1 provided at the adjacent corners thereof, and the FPC 21b is fed. The point P0 and the connection point P2 provided at the adjacent corners thereof are electrically connected to the lower transparent electrode 11 and the upper transparent electrode 16. However, the present invention is not limited to this, and the FPCs 21a and 21b may be electrically connected to the lower transparent electrode 11 and the upper transparent electrode 16 at two or more points.

Further, in the present embodiment, the FPC 21 is connected to the lower transparent electrode 11 and the upper transparent electrode 16 at the connection points P1 and P2 at the corners, but is not limited to this, and is connected at a place other than the corners. You may be.

FIG. 12 shows the potentials of the lower transparent electrode 11 and the upper transparent electrode 16 when the thickness of the copper foil of the FPC is 35 μm, the width is 2 mm, and a driving voltage of 10 V whose polarity is switched at a frequency of 240 Hz is applied. , (A) show the potential of the electrode of the upper laminated body 5U, and (b) shows the potential of the electrode of the lower laminated body 5D.
The thickness of the copper foil of the FPC is not limited to 35 μm, but may be 9 μm or more.
FIG. 13 is a diagram showing an electric field generated between the upper laminated body 5U and the lower laminated body 5D under the same conditions.
FIG. 14 shows the relationship between the potential difference between the lower transparent electrode 11 and the upper transparent electrode 16 and the distance from the feeding point P0 under the same conditions.
FIG. 15 is a diagram showing the relationship between the distance from the feeding point P0 and the potential difference between the lower transparent electrode 11 and the upper transparent electrode 16 in the first embodiment and the second embodiment described later under the same conditions. be.

[Effect of the first embodiment]
(1) As shown in FIGS. 12 and 13, according to the present embodiment, the voltage drop in the plane of the light control film 1 is smaller than that of the comparative embodiment of FIG. Further, as shown in FIG. 14, with respect to the frequency at which the polarity is switched, the higher the frequency, the larger the rate of voltage drop as the distance from the feeding point P0 increases.
Then, as shown in FIG. 15, when a driving voltage of 10 V whose polarity is switched at a frequency of 240 Hz is applied, the distance from the feeding point P0 is about 1.4 m at a time point of 1 msec after the polarity switching (feeding point P0). The potential difference between the upper transparent electrode 16 and the lower transparent electrode 11 at (near P3 diagonally) is about 9.7 V.
This value has a considerably reduced difference from 10 V as compared with the potential difference of 6.5 V in the comparative form shown in FIG.
That is, even at a position away from the feeding point P0, the time constant at the time of polarity reversal of the drive voltage is shorter than that in the comparative form, and the drop in transmittance is small. Therefore, even in a portion far from the feeding point P0, the fluctuation of the transmittance is small and the flicker is less likely to be recognized.

(2) According to the present embodiment, there is only one feeding point P0 directly connected from the drive power source 20. From the feeding point P0, the FPC 21 is extended in two directions along the side sides of the lower transparent electrode 11 and the upper transparent electrode 16. By extending the FPC 21 in this way and connecting it to the lower transparent electrode 11 and the upper transparent electrode 16 at the connection points P1 and P2 away from the feeding point P0, the feeding power is supplied to the lower transparent electrode 11 and the upper transparent electrode 16. Is also performed from a feeding point other than P0.
As a result, as compared with the case where the number of feeding points P0 is increased, the drop in the transmittance can be reduced by the installation work that is easy and easy to wire.

(3) For example, it is conceivable to substantially reduce the sheet resistance of the lower transparent electrode 11 and the upper transparent electrode 16 by arranging the bus line in the light control film 1. In this case, the power feeding efficiency is improved, but the appearance is spoiled by the bus line. If the bass line is made thin so that it is not noticeable, the cost will increase. However, in the present embodiment, since the FPC 21 is provided on the outer peripheral portion, it can be covered when the light control film 1 is attached to the sunroof 132, the appearance is not impaired, and the cost is increased because the film is formed thin. There is no.

Further, the FPC 21 is not connected to the entire side surface of the lower transparent electrode 11 and the upper transparent electrode 16, and is separated from the feeding point P0 by a predetermined distance (connection points P1 and P2) from the lower transparent electrode 11 and the upper side. It is electrically connected to the transparent electrode 16. When connected to the entire side side, a voltage drop occurs on the way, but since it is connected to the lower transparent electrode 11 and the upper transparent electrode 16 at the connection points P1 and P2 separated from the feeding point P0, the voltage at the connection point The descent is small.

In the present embodiment, the light control film 1 shows an example in which the liquid crystal layer 8 is sandwiched between the base materials 6 and 15, but the present invention is not limited to this, and the light control film 1 is driven by an AC voltage and has hysteresis and memory properties. The same effect can be obtained by providing the same configuration as the power feeding method even in the light control film of the drive system without the above, for example, the SPD (Suppended Particle Device) system.

[Deformation form 1]
In FIG. 14, when the frequency of the drive voltage becomes high, the charging time (or discharging time) of each frame becomes 8.3 msec at 60 Hz, 4.2 msec at 120 Hz, and 2.1 msec at 480 Hz. The time constant is a unique value of the light control film 1 and does not depend on the frequency. When the distance from the feeding point P0 becomes long, the time constant becomes long, and if charging / discharging is not completed within the above time, the effective voltage becomes low. The degree of voltage drop increases as the time decreases, and therefore increases as the frequency increases.
In FIG. 14, the frequency dependence of the reaching potential difference increases as the distance from the feeding position increases. This indicates that the time constant becomes longer as the distance from the feeding position increases. Therefore, even when driven at 30 Hz to 60 Hz, if flicker is noticeable, it is preferable to increase the number of connection points as compared with the present embodiment. For example, either FPC21a or 21b may be extended to provide a connection point at a position P3 diagonal to the feeding point P0 shown in FIG. As described above, according to the modified form, it is possible to reduce the decrease in the electric field even at a position away from the feeding point P0.

[Deformation form 2]
FIG. 11 shows an example in which the FPCs 21a and 21b extend in two directions from the feeding point P0 and are electrically connected to the lower transparent electrode 11 and the upper transparent electrode 16 at the two connection points P1 and P2. Not limited to this, the number of connection points may be one.
FIG. 23 is a plan view of the light control film of the modified form 2. FIG. 23 (a) is a plan view of an example of the light control film of the modified form 2 (light control film 1C-1), and FIG. 23 (b) is another example of the light control film of the modified form (dimming). It is a top view of the film 1C-2).

As shown in FIG. 23A, in the light control film 1C-1, one FPC21a is extended in one direction from the feeding point P0 along the exposed surface 5d, and the lower transparent electrode 11 at the connection point P1, It is electrically connected to the upper transparent electrode 16. That is, in this light control film 1C-1, the electrode is electrically connected only at two points, the feeding point P0 and the connection point P1.
Further, in the light control film 1C-2, as shown in FIG. 23B, one FPC21b is extended in one direction from the feeding point P0 along the exposed surface 5u, and the lower transparent electrode at the connection point P2. 11. It is electrically connected to the upper transparent electrode 16. That is, in this light control film 1C-2, the light is conducting to the electrode only at two points, the feeding point P0 and the connection point P2.

In such a form, the gradient of the potential difference is slightly steeper than that of the first embodiment described above, but flicker can be sufficiently reduced in practical use. Further, in particular, when the size of the light control film is smaller than the size (1.2 m × 0.8 m) shown in the first embodiment, the gradient of the potential difference becomes gentle and flicker is effectively prevented. Can be reduced.
Further, in such a form, the number of members required for wiring and the like can be reduced, and the production cost and the like can be sufficiently reduced.

[Second Embodiment]
FIG. 16 shows the potential difference between the two electrodes and the potential difference from the feeding point P0 when the thickness of the copper foil of the FPC 21 is 9 μm and the frequencies of the voltages supplied from the drive power supply 20 are 60 Hz, 120 Hz, 240 Hz, and 480 Hz. It is a figure corresponding to FIG. 14 which shows the relationship with a distance. The width of the copper foil is 2 mm.
Compared with FIG. 14, the effective voltage becomes lower as the distance from the feeding point P0 increases. Even in the case of 240 Hz, when the distance from the feeding point P0 is about 1.4 m, the potential difference within the allowable range is 9 V or less. Therefore, the flicker becomes more noticeable.
However, at 60 Hz and 120 Hz, the effective voltage at the diagonal point P3 is 9 V or more, which is an allowable range, so that there is no significant difference in transmittance when driving at a frequency of 60 Hz or less.
However, when the thickness of the copper foil is 9 μm and the flicker is noticeable due to the long time constant, the degree of flicker can be increased by increasing the connection point to another, for example, the position P3 as described above. It can be improved. Further, the degree of flicker can be improved by further increasing the line width from 2 mm.

[Third Embodiment]
Next, the light control film 1A according to the third embodiment of the present invention will be described. 17A and 17B are plan views of the light control film 1A of the third embodiment, where FIG. 17A is a diagram illustrating a patterning shape of the upper transparent electrode 16 and FIG. 17B is a diagram illustrating a patterning shape of the lower transparent electrode 11.
In the following description, the same parts as those in the first embodiment are designated by the same reference numerals. The difference between the third embodiment and the first embodiment is the shape of the upper transparent electrode 16 and the lower transparent electrode 11. Although the description of the alignment layers 17 and 13 is omitted in the following description, the alignment layers 17 and 13 are formed on the upper transparent electrode 16 and the lower transparent electrode 11.

(Adhesion layer)
In the third embodiment, as described in the first embodiment, the adhesion layer 15a is formed on the surface of the base material 15 (hereinafter referred to as the upper base material in the present embodiment), and the upper transparent electrode is formed on the adhesion layer 15a. 16 is provided.
An adhesion layer 6a is also formed on the surface of the base material 6 (referred to as a lower base material in the present embodiment), and a lower transparent electrode 11 is provided on the adhesion layer 6a.
The adhesion layers 15a and 6a are provided to improve the adhesion between the upper transparent electrode 16 and the lower transparent electrode 11 and the upper base material 15 and the lower base material 6, but the sealing material 19 and the adhesion layer 15a are provided. The adhesiveness to 6a and 6a is also higher than the adhesion between the sealing material 19, the upper transparent electrode 16 and the lower transparent electrode 11.

As shown in FIG. 17A, the upper base material 15 and the lower base material 6 have slightly different aspect ratios, and their side sides are arranged so as to be offset from each other.
Since the upper base material 15 and the lower base material 6 are arranged so as to be offset from each other in this way, the exposed surface of the upper base material 15 facing the lower base material 6 side is outside the laminated region overlapping with the lower base material 6. 5u1 and an exposed surface 5u2 are formed. Further, an exposed surface 5d1 and an exposed surface 5d2 facing the upper base material 15 side are formed on the outside of the laminated region of the lower base material 6 that overlaps with the upper base material 15 (see FIG. 17B).

(Upper transparent electrode)
The upper transparent electrode 16 is not provided on the entire surface of the upper base material 15 in the present embodiment, and there is a first exposed region 30 in which the adhesion layer 15a is exposed. The upper transparent electrode 16 is divided into a plurality of regions electrically connected (continuous) to each other by the first exposed region 30.

The plurality of regions of the upper transparent electrode 16 are as follows.
(1) The exposed surface electrode portion 16a1 provided on the exposed surface 5u1 and the exposed surface electrode portion 16a2 provided on the exposed surface 5u2.
(2) A rectangular inner electrode portion 16b provided inside the upper base material 15 at a certain distance from the outer edge portion in the laminated region with the lower base material 6 and one size smaller than the laminated region.
(3) Feeding points P0 (P0u) and connection points P1 (P1u) provided in a constant width outer peripheral region surrounding the outer periphery of the inner electrode portion 16b in the laminated region of the upper base material 15 with the lower base material 6. , 16c0, 16c1, 16c2 of the corner electrode portions provided in the vicinity of the connection points P2 (P2u), respectively.

Here, in the third embodiment, among the feeding points P0, the feeding point for feeding the upper transparent electrode 16 is referred to as P0u, and the feeding point for feeding the lower transparent electrode 11 is referred to as P0d. The feeding point P0u is a feeding point provided on the exposed surface 5u2 of the feeding point P0, and the feeding point P0d is a feeding point provided on the exposed surface 5d1 of the feeding point P0.

Of the connection points P1, the connection point connected to the upper transparent electrode 16 is referred to as P1u, and the connection point connected to the lower transparent electrode 11 is referred to as P1d.
The connection point P1d is a connection point provided on the exposed surface 5d1 of the connection points P1.
The connection point P1u is a connection point provided on the exposed surface 5u1 of the connection points P1, and is located where the FPC 21a further extends from the connection point P1d.

Of the connection points P2, the connection point connected to the upper transparent electrode 16 is referred to as P2u, and the connection point connected to the lower transparent electrode 1 is referred to as P2d.
The connection point P2u is a connection point provided on the exposed surface 5u2 of the connection points P2.
The connection point P2d is a connection point provided on the exposed surface 5d1 of the connection points P2, and is located where the FPC 21b further extends from the connection point P2u.

That is, the upper transparent electrode 16 is provided in the portion of the upper base material 15 excluding the corner electrode portions 16c0, 16c1 and 16c2 from the outer peripheral region having a constant width surrounding the outer periphery of the inner electrode portion 16b in the laminated region. This is the first exposed region 30 that has not been exposed. In this portion, the adhesion layer 15a, which is the lower layer of the upper transparent electrode 16, is exposed.

FIG. 18 is an enlarged view of the region S surrounded by the alternate long and short dash line in FIG. 17 (a). As shown in the figure, the upper transparent electrode 16 is partially removed from the corner electrode portion 16c1 (not shown in FIG. 18, but the same applies to the corner electrode portions 16c0 and 16c2), and the adhesion layer 15a is exposed in a streak pattern. A plurality of first exposed regions 30 are also provided in this portion.

These first exposed regions 30 are performed by partially removing the upper transparent electrode 16 by etching. The first exposed region 30 is not limited to the shape shown in the figure. For example, the streaky portion provided in the corner electrode portion 16c1 may have another shape as long as it does not obstruct the flow of current from the connection point P1u to the inner electrode portion 16b as shown by the arrow in the figure. good.

The inner electrode portion 16b and the exposed surface electrode portion 16a1 are electrically connected by the corner electrode portion 16c1 in the vicinity of the connection point P1u.
Although not shown, the inner electrode portion 16b and the exposed surface electrode portion 16a2 are electrically connected by the corner electrode portion 16c0 in the vicinity of the feeding point P0u, and electrically connected by the corner electrode portion 16c2 in the vicinity of the connection point P2u. It is connected.

(Lower transparent electrode)
The lower transparent electrode 11 is also not provided on the entire surface of the lower base material 6 in the present embodiment, and there is a second exposed region 31 in which the adhesion layer 6a is exposed. The lower transparent electrode 11 is divided into a plurality of regions electrically connected to each other by the second exposed region 31.

The plurality of regions of the lower transparent electrode 11 are as follows.
(1) and the exposed surface electrode portion 11a1 provided on the exposed surface 5d1, the exposed surface electrode portion 11a2 provided on the exposed surface 5d2.
(2) A rectangular inner electrode portion 11b provided inside the lower base material 6 at a certain distance from the outer edge portion in the laminated region with the upper base material 15 and one size smaller than the laminated region.
(3) in the stack in the region of the upper substrate 15 in the lower substrate 6, provided on the outer peripheral region of a predetermined width surrounding the periphery of the inner electrode portion 11b, the feeding point P0 (P0D), the connection point P1 (P1d) , Corner electrode portions 11c0, 11c1, 11c2 provided in the vicinity of the connection points P2 (P2d), respectively.

That is, the lower transparent electrode 11 is provided in the portion of the lower base material 6 in which the corner electrode portions 11c0, 11c1 and 11c2 are removed from the outer peripheral region having a constant width surrounding the outer periphery of the inner electrode portion 11b in the laminated region. It is the second exposed region 31 that is not exposed. In this portion, the adhesion layer 6a, which is the lower layer of the lower transparent electrode 11, is exposed.

Further, also in the corner electrode portions 11c0, 11c1 and 11c2, the lower transparent electrode 11 is partially removed to expose the adhesion layer 6a in a streak pattern, and a plurality of second exposed regions 31 are also provided in this portion. ing.

The inner electrode portion 11b and the exposed surface electrode portion 11a1 are electrically connected by the corner electrode portion 11c0 in the vicinity of the feeding point P0d, and are electrically connected by the corner electrode portion 11c1 in the vicinity of the connection point P1d. ..
The inner electrode portion 11b and the exposed surface electrode portion 11a2 are electrically connected by the corner electrode portion 11c2 in the vicinity of the connection point P2d.

(Production method)
Next, a method for manufacturing the light control film 1A of the present embodiment will be described. FIG. 19 is a flowchart showing a manufacturing process of the light control film 1A.

(Lower laminate manufacturing process SP2)
First, in the lower laminate manufacturing step SP2, the lower laminate 5D is manufactured.
The lower laminate manufacturing step SP2 includes an adhesion layer manufacturing step SP2-1, a lower transparent electrode manufacturing step SP2-2, a lower alignment layer manufacturing step SP2-3, an etching step SP2-4, and a spacer placement step SP2-5. include.

In the adhesion layer manufacturing step SP2-1, the adhesion layer 6a is produced on one surface of the lower base material 6 by using an acrylic resin, for example, by a coating method.

In the lower transparent electrode manufacturing step SP2-2, the lower transparent electrode 11 is manufactured on substantially the entire surface of the close contact layer 6a of the lower base material 6 by using ITO by a vacuum film forming method such as sputtering.

In the lower alignment layer manufacturing step SP2-3, the coating liquid for the alignment layer (lower alignment layer) 13 is applied onto the lower transparent electrode 11 of the lower substrate 6, dried, and then irradiated with ultraviolet rays. The lower oriented layer 13 is manufactured by curing with.
In the etching step SP2-4, the lower alignment layer 13 and the lower transparent electrode 11 are partially removed by etching.

As described above, the portions from which the lower alignment layer 13 and the lower transparent electrode 11 are removed are the corner electrode portions 11c0, 11c1 from the region having a constant width surrounding the outer circumference of the inner electrode portion 11b in the laminated region. The portion excluding 11c2 and the streaky portion in the corner electrode portions 11c0, 11c1 and 11c2.
The portion from which the lower alignment layer 13 and the lower transparent electrode 11 have been removed becomes the second exposed region 31 where the adhesion layer 6a is exposed.

Next, in the spacer arranging step SP2-5, a coating liquid in which the bead spacers are dispersed as the spacer 12 is applied by a spin coating method or the like, and then drying and firing processes are sequentially executed. Spacers 12 (bead spacers) are randomly arranged on the entire surface of the space. As a result, the lower laminated body 5D is manufactured.
In this embodiment, a mode in which the bead spacer is used as the spacer 12 will be described, but the present invention is not limited to this, and a photo spacer may be used as in the first embodiment.

(Upper laminate manufacturing process SP3)
The subsequent upper laminate manufacturing step SP3 is the same as the lower laminate manufacturing step SP2 except that the spacer placement step is not included. That is, the upper laminate manufacturing step SP3 includes an adhesion layer manufacturing step SP3-1, an upper transparent electrode manufacturing step SP3-2, an upper oriented layer manufacturing step SP3-3, and an etching step SP3-4.

In the adhesion layer manufacturing step SP3-1, the adhesion layer 15a is produced on one surface of the upper base material 15 by a coating method using an acrylic resin.

In the upper transparent electrode manufacturing step SP3-2, the upper transparent electrode 16 is manufactured on almost the entire surface of the adhesion layer 15a of the upper base material 15 by a vacuum film forming method such as sputtering using ITO.

In the upper alignment layer manufacturing step SP3-3, the coating liquid for the alignment layer (upper alignment layer) 17 is applied onto the upper transparent electrode 16 of the upper base material 15, dried, and then cured by irradiation with ultraviolet rays. As a result, the upper oriented layer 17 is manufactured.
In the etching step SP3-4, the upper alignment layer 17 and the upper transparent electrode 16 are partially removed by etching.
The portion from which the upper alignment layer 17 and the upper transparent electrode 16 are removed is a portion of the outer peripheral region having a constant width surrounding the outer circumference of the inner electrode portion 16b in the laminated region, excluding the corner electrode portions 16c0, 16c1 and 16c2. , A streaky portion in the corner electrode portions 16c0, 16c1 and 16c2.
Then, in the portion where the upper alignment layer 17 and the upper transparent electrode 16 are removed, the adhesion layer 15a is exposed and the first exposed region 30 is formed.

In the sealing material coating step SP4 following the upper laminate manufacturing step SP3, the sealing material 19 is coated on the lower base material 6 using a dispenser.
At this time, the region to which the sealing material 19 is applied is a region T having a constant width from the outer circumference of the laminated region and surrounded by the alternate long and short dash line in FIG.
This region T is a second exposed region 31 in which the lower transparent electrode 11 is not provided except for the corner electrode portions 11c0, 11c1 and 11c2, and the adhesion layer 6a is exposed. The adhesion layer 6a is also exposed in a streak pattern in the corner electrode portions 11c0, 11c1 and 11c2. Therefore, the sealing material 19 comes into contact with the adhesion layer 6a at a portion where the lower transparent electrode 11 is not provided.
Here, since the adhesive strength between the adhesive layer 6a and the sealing material 19 is higher than the adhesive strength between the lower transparent electrode 11 and the sealing material 19, the sealing material 19 adheres well to the lower base material 6.

Next, in the liquid crystal inflow step SP5, the liquid crystal is flowed into the frame-shaped sealing material 19.
In the arrangement of the liquid crystal display, the multipoint ODF (One Drop Filling) injection method is used in this embodiment. The multi-point ODF is a method of dropping a liquid crystal material by a dispenser or the like before attaching the other laminate to a plurality of positions in the sealing material 19.
Further, the method is not limited to the multi-point ODF injection method, and a method of filling the voids formed in the portion related to the liquid crystal layer 8 with the liquid crystal material after laminating the upper laminated body 5U and the lower laminated body 5D may be used. good.

In the laminating step SP6, the upper laminated body 5U and the lower laminated body 5D are pressed by, for example, a roller and bonded to spread the liquid crystal material arranged on the lower laminated body 5D. At this time, the distance between the upper laminated body 5U and the lower laminated body 5D in the central portion of the light control film 1A is maintained by the thickness of the spacer 12 (bead spacer).

At this time, as in the first embodiment, the upper laminated body 5U and the lower laminated body 5D are arranged so that their side sides are displaced from each other. As a result, the exposed surface (first exposed surface) 5u1, 5u2 is formed in the upper laminated body 5U, and the exposed surface (second exposed surface) 5d1, 5d2 is formed in the lower laminated body 5D.

The region of the upper base material 15 that comes into contact with the sealing material 19 by this bonding is a region having a constant width from the outer circumference of the laminated region and surrounded by the alternate long and short dash line in FIG.
This portion is a first exposed region 30 in which the upper transparent electrode 16 is not provided except for the corner electrode portions 16c0, 16c1 and 16c2, and the adhesion layer 15a is exposed, and the corner electrode portions 16c0, 16c1 and In 16c2, the adhesion layer 15a is also exposed in a streak pattern. Therefore, the sealing material 19 comes into contact with the adhesion layer 6a at a portion where the lower transparent electrode 11 is not provided.
Here, since the adhesive strength between the adhesive layer 15a and the sealing material 19 is higher than the adhesive strength between the upper transparent electrode 16 and the sealing material 19, the sealing material 19 adheres well to the upper base material 15.

Then, in the sealing material 19 curing step SP7, the sealing material 19 is cured by ultraviolet irradiation and heating, and the liquid crystal cell 4 is manufactured.

In the subsequent trimming step SP8, the laminate thus produced is trimmed into a rectangular shape. For trimming, various methods applicable to trimming of this type of film material, such as irradiation of a laser beam and trimming using a mold, can be widely applied.

Then, in the bonding step SP9, the linear polarizing plate 2 and the linear polarizing plate 3 are bonded to both sides of the liquid crystal cell 4 with an adhesive. When a guest host type liquid crystal is used and the linear polarizing plate is omitted, this bonding step can be omitted.

Further, in the FPC attaching step SP10, the FPC (flexible printed substrate) 21 extending from the drive power source 20 is attached to the light control film 1A.
The FPC is divided into two directions, one FPC21a is connected to the feeding point P0d of the exposed surface electrode portion 11a1, and the other FPC21b is connected to the feeding point P0u of the exposed surface electrode portion 16a2. The FPC21a and FPC21b have a two-layer structure, one for feeding the lower transparent electrode and the other for feeding the upper transparent electrode, respectively.

The FPC21a extends along the exposed surface electrode portion 11a1, and the portion for feeding the lower transparent electrode of the FPC21a is electrically connected to the exposed surface electrode portion 11a1 at the feeding point P0 (P0d) and the connection point P1 (P1d). (See FIG. 17B), the upper transparent electrode feeding portion of the FPC21a is electrically connected to the exposed surface electrode portion 16a1 at the connection point P1 (P1u) (see FIG. 17A).

The FPC21b extends along the exposed surface electrode portion 16a2, and the upper transparent electrode feeding portion of the FPC21b is electrically connected to the exposed surface electrode portion 11a2 at the feeding point P0 (P0u) and the connection point P2 (P2u) ( (See FIG. 17A), the lower transparent electrode feeding portion of the FPC21b is electrically connected to the exposed surface electrode portion 11a2 at the connection point P2 (P2d).
As described above, the light control film 1A is manufactured in this way (see FIG. 17B).

According to the present embodiment, in addition to the same effect as that of the first embodiment, the following effects are obtained.
According to the present embodiment, in the lower base material 6, the region to which the sealing material 19 is applied is a region having a constant width from the outer periphery of the laminated region and surrounded by the alternate long and short dash line in FIG. This portion is a second exposed region 31 in which the lower transparent electrode 11 is not provided except for the corner electrode portions 11c0, 11c1 and 11c2, and the adhesion layer 6a is exposed, and the corner electrode portions 11c0, 11c1 and 11c2 are also provided. The adhesion layer 6a is exposed in a streak pattern.
Further, the region of the upper base material 15 that comes into contact with the sealing material 19 is a region having a constant width from the outer periphery of the laminated region and surrounded by the alternate long and short dash line in FIG. In this portion, the upper transparent electrode 16 is not provided except for the corner electrode portions 16c0, 16c1 and 16c2, and the corner electrode portions 16c0, 16c1 and 16c2 are also in close contact with each other in the first exposed region 30 where the adhesion layer 15a is exposed. The layer 15a is exposed in a streak pattern.

That is, the sealing material 19 is in contact with the adhesive layer 15a provided on the upper base material 15 and the adhesive layer 6a provided on the lower base material 6, and the adhesive strength between the adhesive layer 15a and the adhesive layer 6a and the sealing material 19 is high. It is higher than the adhesion strength between the lower transparent electrode 11 or the upper transparent electrode 16 and the sealing material 19.
Therefore, the adhesion between the sealing material 19 and the lower base material 6 and the upper base material 15 is good, and the possibility of peeling of the sealing material 19 is small.

In the present embodiment, the upper transparent electrode 16 is not provided in the region having a certain width from the outer periphery of the laminated region other than the corner electrode portions 16c0, 16c1 and 16c2, and the corner electrode portions 11c0, 11c1 and A mode in which the lower transparent electrode 11 is not provided except for 11c2 and the adhesion layer 15a is exposed has been described.
However, the present invention is not limited to this, and patterning may be performed so as to leave a part of the transparent electrodes 16 and 11 in a region other than the corner electrode portion. In this way, the adhesion is improved by the unevenness of the patterned transparent electrodes 16 and 11.

Further, according to the present embodiment, the method of exposing the adhesion layer 6a and the adhesion layer 15a in the lower base material 6 and the upper base material 15 is performed in the etching step, so that there is an effect that patterning is easy.

[Fourth Embodiment]
Next, the light control film 1B of the fourth embodiment of the present invention will be described. 20A and 20B are plan views of the light control film 1B of the fourth embodiment, where FIG. 20A is a diagram illustrating a patterning shape of the upper transparent electrode 16 and FIG. 20B is a diagram illustrating a patterning shape of the lower transparent electrode 11.
In the following description, the same parts as those in the first embodiment or the third embodiment are designated by the same reference numerals, and the description thereof will be omitted. The fourth embodiment differs from the third embodiment in the shapes of the base material 15 (referred to as the upper base material in the present embodiment) and the base material 6 (referred to as the lower base material in the present embodiment), the upper transparent electrode 16 and The shape of the lower transparent electrode 11 and the wiring method.

Also in the fourth embodiment, the adhesion layer 15a is formed on the surface of the upper base material 15, and the upper transparent electrode 16 is provided on the adhesion layer 15a. Further, an adhesion layer 6a is also formed on the surface of the lower base material 6, and the lower transparent electrode 11 is provided on the adhesion layer 6a.

As shown in FIG. 20A, the upper base material 15 has a rectangular shape substantially similar to that of the lower base material 6, and is smaller than the lower base material 6. The upper base material 15 is laminated on the lower base material 6 so that two of the four outer peripheral sides overlap each other. The two overlapping sides are two sides extending from the point P4 diagonal to the feeding point P0.
As a result, in the lower transparent electrode 11, an exposed surface 5d1 facing the upper transparent electrode 16 side is formed at the edge extending from the feeding point P0 (P0d) to the connection point P1 (P1d, P1u) along the longitudinal direction. .. Further, an exposed surface 5d2 facing the upper transparent electrode 16 side is formed at an edge extending from the feeding point P0 (P0u) to the connection point P2 (P2d, P2u) along the longitudinal direction.

In the fourth embodiment, among the feeding points P0, the feeding point for feeding the upper transparent electrode 16 is referred to as P0u, and the feeding point for feeding the lower transparent electrode 11 is referred to as P0d.
The feeding point P0u is a feeding point provided on the exposed surface 5d2 of the feeding point P0, and the feeding point P0d is a feeding point provided on the exposed surface 5d1 of the feeding point P0.

Of the connection points P1, the connection point connected to the upper transparent electrode 16 is referred to as P1u, and the connection point connected to the lower transparent electrode 11 is referred to as P1d.
The connection point P1u is provided at the end on the exposed surface 5d1 on the opposite end side to the feeding point P0, and the connection point P1d is the region of the feeding point P0 on the exposed surface 5d1 and the end on the opposite end side. It is arranged closer to the feeding point P0.

Of the connection points P2, the connection point connected to the upper transparent electrode 16 is referred to as P2u, and the connection point connected to the lower transparent electrode 11 is referred to as P2d.
The connection point P2u is provided at the end on the exposed surface 5d2 on the opposite end side to the feeding point P0, and the connection point P2d is the region of the feeding point P0 on the exposed surface 5d2 and the end on the opposite end side. It is arranged closer to the feeding point P0 than P2u.

(Upper transparent electrode)
The upper transparent electrode 16 is not provided on the entire surface of the upper base material 15 in the present embodiment, and there is a first exposed region 30 in which the adhesion layer 15a is exposed. The upper transparent electrode 16 is divided into a plurality of regions electrically connected to each other by the first exposed region 30.

The plurality of regions included in the upper transparent electrode 16 are as follows.
(1) A rectangular inner electrode portion 16b that is one size smaller than the upper base material 15 and is inside a certain distance from the outer circumference of the upper base material 15.
(2) Corner electrodes 16e0, 16e1, 16e2 provided in the vicinity of the feeding point P0u, the connection point P1u, and the connection point P2u in the area near the corner in the outer peripheral region of the inner electrode portion 16b.

That is, the upper transparent electrode 16 is not provided in the portion of the upper base material 15 in which the corner electrodes 16e0, 16e1 and 16e2 are removed from the outer peripheral region having a constant width surrounding the outer periphery of the inner electrode portion 16b in the laminated region. The first exposed region 30. In this portion, the adhesion layer 15a, which is the lower layer of the upper transparent electrode 16, is exposed.
Further, similarly to the third embodiment, the upper transparent electrode 16 is partially removed from the corner electrodes 16e0, 16e1 and 16e2 to expose the adhesive layer in a streak pattern, and the first exposed region 30 is also formed in this portion. There are multiple.

(Lower transparent electrode)
The lower transparent electrode 11 is also not provided on the entire surface of the lower base material 6 in the present embodiment, and there is a second exposed region 31 in which the adhesion layer 15a is exposed. The lower transparent electrode 11 is divided into a plurality of regions electrically connected to each other by the second exposed region 31.

The plurality of regions included in the lower transparent electrode 11 are as follows.
(1) A rectangular inner electrode portion 11b provided inside the lower base material 6 at a certain distance from the outer edge portion in the laminated region with the upper base material 15 and one size smaller than the laminated region.
(2-1) A corner electrode portion 11f1 provided at a connection point P1d of the exposed surface 5d1, extending from the exposed surface 5d1 to the inside of the laminated region, and electrically connected to the inner electrode portion 11b.
(2-2) A corner electrode portion 11f0 provided at a feeding point P0d on the exposed surface 5d1, extending from the exposed surface 5d1 to the inside of the laminated region and electrically connected to the inner electrode portion 11b.
(2-3) A corner electrode portion 11f2 provided at a connection point P2d of the exposed surface 5d2, extending from the exposed surface 5d2 to the inside of the laminated region, and electrically connected to the inner electrode portion 11b.

(3-1) An upper connection electrode portion 11e1 provided at a connection point P1u of the exposed surface 5d1 and extending from the exposed surface 5d1 to the inside of the laminated region and not electrically connected to the inner electrode portion 11b.
(3-2) An upper connection electrode portion 11e0 provided at a feeding point P0u on the exposed surface 5d2, extending from the exposed surface 5d2 to the inside of the laminated region, and not electrically connected to the inner electrode portion 11b.
(3-3) The upper connection electrode portion 11e2 provided at the connection point P2u of the exposed surface 5d2, extending from the exposed surface 5d2 to the inside of the laminated region, and not electrically connected to the inner electrode portion 11b.

FIG. 21 is an enlarged view of the region S surrounded by the alternate long and short dash line in FIG. 20 to explain the patterning shape of the upper and lower transparent electrodes, and FIG. 22 is a cross-sectional view taken along the line AB of FIG.
As shown in the figure, in the laminated region of the upper base material 15 and the lower base material 6, the corner electrode 16e1 provided on the upper base material 15 and the upper connection electrode portion 11e1 provided on the lower base material 6 A bead sealing portion 191 containing a conductive bead 32 as a sealing material is arranged in the overlapping portion. The corner electrode 16e1 provided on the upper base material 15 and the upper connection electrode portion 11e1 provided on the lower base material 6 are electrically connected via the beads 32. Although only one bead 32 is shown in FIGS. 20 and 21 for easy understanding, a plurality of beads are actually arranged. Further, the beads 32 are made of resin and the surface thereof is gold-plated.
Although not shown, the corner electrode 16e0 provided on the upper base material 15 and the upper connection electrode portion 11e0 provided on the lower base material 6 in the laminated region of the upper base material 15 and the lower base material 6 are provided. The corner electrode 16e2 provided on the upper base material 15 and the upper connection electrode portion provided on the lower base material 6 in the overlapping region of the upper base material 15 and the lower base material 6. Similarly, the bead seal portion 191 is arranged in the portion where the 11e2 overlaps.

The FPC 21 extending from the drive power supply is divided into two directions, one FPC 21a extends the exposed surface 5d1 and the other FPC 21b extends the exposed surface 5d2.

The line for feeding the lower transparent electrode of the FPC 21a is connected to the corner electrode portion 11f0 at the feeding point P0d, and is connected to the corner electrode portion 11f1 at the connecting point P1d. Since the corner electrode portion 11f0 and the corner electrode portion 11f1 are each connected to the inner electrode portion 11b, power for feeding the lower transparent electrode is supplied to the inner electrode portion 11b from the FPC 21a.

The line for feeding the upper transparent electrode of the FPC 21a is connected to the upper connecting electrode portion 11e1 at the connection point P1u. Since the upper connection electrode portion 11e1 is connected to the square electrode 16e1 via the beads 32 in the bead seal portion 191, power for feeding the upper transparent electrode is supplied to the inner electrode portion 16b from the FPC 21a. The conductive member may be any as long as it electrically connects the upper and lower transparent electrodes, and is not limited to the bead seal portion 191.

The line for feeding the lower transparent electrode of the FPC 21b is connected to the corner electrode portion 11f2 at the connection point P2d. Since the corner electrode portion 11f2 is connected to the inner electrode portion 11b, electric power for feeding the lower transparent electrode is supplied to the inner electrode portion 11b from the FPC 21a.
The line for feeding the upper transparent electrode of the FPC 21b is connected to the upper connecting electrode portion 11e0 at the feeding point P0u. Since the upper connection electrode portion 11e0 is connected to the square electrode 16e0 via the beads 32 in the bead seal portion 191, power for feeding the upper transparent electrode is supplied to the inner electrode portion 16b from the FPC 21a.
Further, the upper transparent electrode feeding line is connected to the upper connecting electrode portion 11e2 at the connection point P2u. Since the upper connection electrode portion 11e2 is connected to the square electrode 16e2 via the beads 32 in the bead seal portion 191, power for feeding the upper transparent electrode is supplied to the inner electrode portion 16b from the FPC 21a.

Also in this embodiment, the light control film 1B is manufactured in the same manner as in the third embodiment.
That is, the sealing material 19 comes into contact with the second exposed region 31 where the adhesion layer 15a on which the lower transparent electrode 11 is not provided on the lower base material 6 is exposed. Further, the sealing material 19 comes into contact with the first exposed region 30 where the adhesion layer 15a is exposed and the upper transparent electrode 16 is not provided on the upper base material 15.
Therefore, the sealing material 19 is in contact with the adhesion layer 15a provided on the upper base material 15 and the adhesion layer 6a provided on the lower base material 6, and the adhesion strength between the adhesion layer 15a and the adhesion layer 6a and the sealing material 19 is high. , It is higher than the adhesion strength between the lower transparent electrode 11 and the upper transparent electrode 16 and the sealing material 19. Therefore, the adhesion between the sealing material 19 and the lower base material 6 and the upper base material 15 is good, and the possibility of peeling of the sealing material 19 is small.

[Fifth Embodiment]
Next, the light control film 1D according to the fifth embodiment of the present invention will be described.
FIG. 24 is a plan view of the light control film 1D of the fifth embodiment. FIG. 24A is a diagram for explaining the patterning shape of the upper transparent electrode 16, and FIG. 24B is a diagram for explaining the patterning shape of the lower transparent electrode 11.
In the following description, the same parts as any of the first embodiment, the third embodiment, and the fourth embodiment are designated by the same reference numerals, and the description thereof will be omitted. The fifth embodiment differs from the first embodiment in the shapes of the base material 15 (referred to as the upper base material in the present embodiment) and the base material 6 (referred to as the lower base material in the present embodiment), the upper transparent electrode 16 and the lower surface. The shape of the side transparent electrode 11, the wiring method, and the like.
In the present embodiment, the upper base material 15 and the lower base material 6 have a rectangular shape and the same shape, and when observed from the normal direction with respect to the plane direction of the light control film 1D, the four side sides thereof are Arranged to match.

(Upper transparent electrode)
The upper transparent electrode 16 is not provided on the entire surface of the upper base material 15 in the present embodiment, but is formed inside the first exposed region 30 provided on the peripheral edge of the upper base material 15. The first exposed region 30 is formed along the four side sides of the upper base material 15 with a predetermined width, and is an region where the adhesion layer 15a is exposed.
(Lower transparent electrode)
In the present embodiment, the lower transparent electrode 11 is not provided on the entire surface of the lower base material 6, but is formed inside the second exposed region 31 provided on the peripheral edge of the lower base material 6. The second exposed region 31 is formed along the four side sides of the lower base material 6 with a predetermined width (the same width as the first exposed region 30 in the present embodiment), and the adhesion layer 6a is exposed. The area. Also. The lower transparent electrode 11 has the following regions.
(1) An inner electrode portion 11b formed inside the second exposed region 31 and electrically connected to the feeding point P0d and the connection points P1d and P2d.
(2-1) An upper connection electrode portion 11e1 provided at the connection point P1u and a region around the connection point P1u and not electrically connected to the inner electrode portion 11b.
(2-2) An upper connection electrode portion 11e0 provided in the feeding point P0u and a region around the feeding point P0u and not electrically connected to the inner electrode portion 11b.
(2-3) An upper connection electrode portion 11e2 provided at the connection point P2u and a region around the connection point P2u and not electrically connected to the inner electrode portion 11b.
In the present embodiment, an example in which the first exposed region 30 and the second exposed region 31 are formed is shown, but the present invention is not limited to this, and for example, the first exposed region 30 and the second exposed region 31 are not formed. May be.

FIG. 25 is a diagram for explaining the patterning shape of the upper and lower transparent electrodes at the connection point P1. 25 (a) is an enlarged view of the region S2 surrounded by the alternate long and short dash line shown in FIG. 24, and FIG. 25 (b) is a cross-sectional view taken along the line A2-B2 shown in FIG. 25 (a).
When the light control film 1D is observed from the normal direction with respect to the plane direction, the upper transparent electrode 16 and the upper transparent electrode portion 11e1 provided on the lower base material 6 overlap with each other. A bead seal portion 191 containing the conductive beads 32 as shown in the fourth embodiment described above is provided between the 16 and the upper connection electrode portion 11e1, and the bead seal portion 191 is provided through the beads 32. The upper transparent electrode 16 and the upper connection electrode portion 11e1 are electrically connected.
Although not shown, when the light control film 1D is observed from the normal direction with respect to the plane direction, the upper transparent electrode 16 provided on the upper base material 15 and the upper connection electrode provided on the lower base material 6 are provided. Similarly, beads 32 are also provided on the portion where the portion 11e0 overlaps, the portion where the upper transparent electrode 16 provided on the upper base material 15 and the upper connecting electrode portion 11e2 provided on the lower base material 6 overlap. The contained bead seal portion 191 is arranged. Although the bead seal portion 191 has been described in the present embodiment, the conductive member that electrically connects each upper connection electrode portion and the upper transparent electrode 16 electrically connects the upper and lower transparent electrodes. Anything may be used, and the present invention is not limited to the bead seal portion 191.

In FIG. 24 and the like, the FPCs 21a and 21b are located along the side sides of the upper base material 15 and the lower base material 6 from the FPC 21 in the vicinity of the corners of the light control film 1D provided with the feeding points P0 (P0u, P0d). It extends in two directions toward the adjacent corners.
The FPC21a is connected to the upper and lower transparent electrodes at the connection points P1 (P1u, P1d), and the FPC21b is connected to the upper and lower transparent electrodes at the connection points P2 (P2u, P2d).
In the present embodiment, the FPCs 21a and 21b are located outside the light control film 1D, but the present invention is not limited to this, and the FPCs 21a and 21b are bonded to the surface of the light control film 1D with an adhesive or the like. It may be in the form of being fixed.
Further, the FPCs 21a and 21b include lines 21au and 21bu for feeding the upper transparent electrode and lines 21bu and 21b for feeding the lower transparent electrode, respectively. In FIG. 24, these are shown for ease of understanding, but in reality, the upper transparent electrode feeding line and the lower transparent electrode feeding line are laminated via an insulating layer, etc. Each of them is configured as one flexible printed substrate.

The line 21d for feeding the lower transparent electrode of the FPC 21 is connected to the inner electrode portion 11b at the feeding point P0d.
Further, the lines 21ad and 21bd for feeding the lower transparent electrodes of the FPCs 21a and 21b are connected to the inner electrode portion 11b at the connection points P1d and P2d, respectively.
As a result, electric power for feeding the lower transparent electrode is supplied from the FPC 21 to the inner electrode portion 11b of the lower transparent electrode 11.

The upper transparent electrode feeding line 21u of the FPC 21 is connected to the upper connecting electrode portion 11e0 at the feeding point P0u. The upper connection electrode portion 11e0 is connected to the upper transparent electrode 16 via the beads 32 in the bead seal portion 191, and power for feeding the upper transparent electrode is supplied from the FPC 21 to the upper transparent electrode 16.
The upper transparent electrode feeding line 21au of the FPC 21a is connected to the upper connecting electrode portion 11e1 at the connection point P1u. As described above, the upper connection electrode portion 11e1 is connected to the upper transparent electrode 16 via the beads 32 in the bead seal portion 191, and the FPC 21a supplies the upper transparent electrode 16 with electric power for feeding the upper transparent electrode. Will be done.
Further, the upper transparent electrode feeding line 21bu is connected to the upper connecting electrode portion 11e2 at the connection point P2u. The upper connection electrode portion 11e2 is connected to the upper transparent electrode 16 via the beads 32 in the bead seal portion 191, and power for feeding the upper transparent electrode is supplied from the FPC 21bu to the upper transparent electrode 16.

The light control film 1D of the present embodiment is manufactured in the same manner as in the third embodiment.
Further, although not shown in FIG. 24, in the present embodiment, the sealing material 19 is provided with a predetermined width along the outer edge of the region where the inner electrode portion 11b and the upper transparent electrode 16 overlap. Then, in the present embodiment, the sealing material 19 comes into contact with the exposed adhesion layer 6a in the second exposed region 31 of the lower base material 6, and the exposed adhesion layer 15a in the first exposed region 30 of the upper base material 15. Contact with. As described above, the adhesive strength between the adhesive layer 15a and the adhesive layer 6a and the sealing material 19 is higher than the adhesive strength between the lower transparent electrode 11 and the upper transparent electrode 16 and the sealing material 19. Therefore, the adhesion between the sealing material 19 and the lower base material 6 and the upper base material 15 is improved, and peeling of the sealing material 19 can be suppressed.

By adopting the above-described form, it is possible to use a base material having the same shape as the upper base material 15 and the lower base material 6, and it is possible to reduce the production cost. In addition, peeling of the sealing material 19 can be suppressed, and the quality of the light control film 1D can be improved.

[Other variants]
In each of the above-described embodiments, the dimming film is attached to the sunroof of the vehicle, but the present invention is not limited to this, and for example, it can be attached to other windows (rear window, front window, side window) of the vehicle. It may be pasted together, or it may be pasted on a window of a building or the like.
Further, in each embodiment and the like, the translucent member to which the light control film is bonded is not limited to glass, and may be bonded to a resin plate-shaped translucent member such as acrylic or PC.
Further, in each embodiment and the like, the electrical wiring is not limited to the FPC, and a member in which a copper foil is laminated on an insulating layer may be used by being bonded onto a light control film.

1,1A, 1B, 1C, 1D Dimming film 2 Linear polarizing plate 2A, 3A Phase difference film 3 Linear polarizing plate 4 Liquid crystal cell 5D Lower laminate 5DL Lower 1st side 5DS Lower 2nd side 5DS, 5DU side Side 5U Upper laminated body 5UL Upper first side side 5USC Upper second side side 5d, 5u Exposed surface 6 Base material (lower base material)
8 Liquid crystal layer 11 Transparent electrode (lower transparent electrode)
12 Spacer 13 Oriented layer (lower oriented layer)
15 Base material (upper base material)
16 Transparent electrode (upper transparent electrode)
17 Oriented layer (upper oriented layer)
19 Sealing material 191 Bead sealing part 130 Vehicle

Claims (8)

A planar transparent electrode placed on the base material and provided with a feeding point connected to the drive power supply,
The electrical wiring that is electrically connected to the transparent electrode
With
The feeding point is provided on the outer edge of the transparent electrode.
The electrical wiring extends from the feeding point along the outer edge of the substrate and is electrically connected to the transparent electrode at a connection point provided at a position different from the feeding point .
The base material comprises a first base material and a second base material, and comprises a first base material and a second base material.
The transparent electrode includes a first transparent electrode arranged on the first base material and a second transparent electrode arranged on the second base material.
The first base material and the second base material are arranged so that the first transparent electrode and the second transparent electrode face each other with a liquid crystal display sandwiched between them.
The first base material and the second base material have a laminated region that overlaps with each other.
A liquid crystal display and a sealing material arranged so as to surround the liquid crystal display are arranged in the laminated region.
A part of the second transparent electrode is insulated from another part, and the part is electrically connected to the first transparent electrode.
Dimming film. The first base material and the second base material are laminated so as to form a laminated region and an exposed surface that does not overlap with each other.
In the portion of the first base material on which the sealing material is arranged, there is a first exposed region that does not include the first transparent electrode.
A second exposed region that does not include the second transparent electrode exists in the portion of the second base material on which the sealing material is arranged.
The dimming film according to claim 1. Before SL on the surface of the second substrate side of the first substrate, a first exposed surface does not overlap the second substrate is formed,
Before Symbol The said surface of the first substrate side of the second substrate, a second exposed surface which does not overlap with the first substrate is formed,
The electrical wiring is arranged on the first exposed surface and the second exposed surface.
The light control film according to claim 1 or 2. The electrical wiring is a flexible printed substrate having a copper foil thickness of 9 microns or more.
The dimming film according to any one of claims 1 to 3. In the flexible printed substrate, two layers of copper foil are laminated via an insulating layer.
The dimming film according to claim 4. The electrical wiring extends along two sides extending in different directions starting from the feeding point.
The dimming film according to any one of claims 1 to 5. With transparent members
The light control film according to any one of claims 1 to 6 , which is arranged on the transparent member.
Dimming member. The dimming film according to any one of claims 1 to 6 , which is arranged at a portion where external light is incident.
vehicle.

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