JP2014091405A - Panel with light control sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a panel with a light control sheet which prevents a coating agent from peeling off, secures a visibility area, and can maintain a favorable appearance.SOLUTION: In a panel with a light control sheet in which a light control sheet 23 is provided between glass layers 21, 22, a translucent coating agent 24 is formed to cover areas from the outer peripheral end face of the light control sheet 23 to the outer peripheral end face of the glass layer 21 and the other faces 21b, 22b.

Description

  The present invention relates to a panel with a light control sheet.

2. Description of the Related Art Conventionally, a configuration using a panel with a light control sheet for a window glass of a vehicle such as a sunroof is known as a configuration for adjusting light incident on a vehicle interior.
A panel with a light control sheet has a light control sheet such as a liquid crystal disposed between two sheets of glass. By applying a voltage to the light control sheet, the color of the light control sheet is adjusted. It adjusts (dimming) the transmittance of light that passes through and enters the vehicle interior.

Here, for example, Patent Document 1 discloses a configuration in which an intermediate film having a frame structure with a central portion cut out between two sheets of glass is disposed, and a light control sheet is enclosed inside the intermediate film. Patent Document 1 also describes a configuration in which a shielding member such as black ceramics is disposed in a region outside the light control sheet (a portion where the glass and the intermediate film overlap) of the panel with the light control sheet. .
According to this configuration, of the light incident on the panel with the light control sheet, the light incident on the light control region in which the light control sheet is enclosed is light-controlled and enters the vehicle interior, and the light incident on the shielding member is It is shielded by the shielding member.

JP 2007-326763 A JP-A-61-201216

By the way, recently, it is considered to employ a panel with a light control sheet for a movable window such as a door window as well as a fixed window fitted in a vehicle body such as a sunroof.
However, when the configuration of Patent Document 1 described above is adopted for the movable window, since the black ceramic is disposed on the outer peripheral portion of the movable window, there is a problem that the visual field region becomes narrow.
On the other hand, when the shielding member is not arranged, in the configuration of Patent Document 1, the light control region in the panel with the light control sheet becomes partial, and the appearance is deteriorated.

On the other hand, Patent Document 2 encloses the light control sheet up to the same position as the outer peripheral end surface of the glass, and covers both the outer peripheral end surface of the glass and the outer peripheral end surface of the light control sheet with an adhesive. The structure which seals is disclosed.
However, in the configuration of Patent Document 2, when an external force is applied from the thickness direction of the glass to the side of the adhesive, specifically, the joint between the outer peripheral end surface of the glass and the adhesive, the adhesive is peeled off. There is a risk of it. In particular, because the movable window such as a door window may expose the end of the panel with the light control sheet, the adhesive is more easily peeled off.

  Therefore, the present invention has been made in view of the above-described circumstances, and provides a panel with a light control sheet that can secure a visual field area and maintain a good appearance while preventing peeling of a coating agent. With the goal.

  In order to achieve the above object, the invention described in claim 1 is dimming on one surface (for example, one surface 21a in the embodiment) of the first transparent panel (for example, the first glass layer 21 in the embodiment). A panel with a light control sheet (for example, the door window 3 in the embodiment) provided with a sheet (for example, the light control sheet 23 in the embodiment), and the first transparent panel from the outer peripheral end of the light control sheet A coating agent having optical transparency (for example, coating agent 24 in the embodiment) is formed so as to cover the outer peripheral end portion and the other surface of the first transparent panel (for example, the other surface 21b in the embodiment). It is characterized by.

  The invention described in claim 2 is characterized in that the outer peripheral end portion of the light control sheet is disposed at the same position in the surface direction as the outer peripheral end portion of the first transparent panel.

  The invention described in claim 3 is characterized in that the coating agent covers the entire other surface of the first transparent panel.

  In the invention described in claim 4, a second transparent panel (for example, the second glass layer 22 in the embodiment) is provided on the surface of the light control sheet opposite to the surface to be joined to the first transparent panel. And the coating agent covers an outer peripheral end of the second transparent panel.

  In the invention described in claim 5, the outer peripheral end portion of the light control sheet is disposed at the same position in the surface direction with respect to the outer peripheral end portions of the first transparent panel and the second transparent panel. (For example, the first end portion 23a in the embodiment) and the second end portion (for example, in the embodiment) arranged on the inner side in the surface direction with respect to the outer peripheral end portions of the first transparent panel and the second transparent panel. 2nd end part 23b), and the said 1st transparent panel and the said 2nd transparent panel are joined in the state which avoided the said light control sheet in the said 2nd end part side, It is characterized by the above-mentioned.

  In the invention described in claim 6, the panel with the light control sheet is a door window of a vehicle (for example, the vehicle 1 in the embodiment) that can be moved up and down, and the first end portion of the light control sheet is It is set to the front-end | tip part which follows the raising / lowering direction among the outer peripheral edge parts of the said panel with a light control sheet | seat, and the said 2nd end part is set to parts other than the said front-end | tip part.

  In the invention described in claim 7, the coating agent is a surface on the opposite side to the surface (for example, one surface 22a in the embodiment) to which the light control sheet is bonded in the second transparent panel (for example, The other surface 22b) in the embodiment is entirely covered.

  The invention described in claim 8 is characterized in that the coating agent comprises an ultraviolet curable resin.

  The invention described in claim 9 is characterized in that the outer peripheral end of the first transparent panel and the outer peripheral end of the light control sheet are covered with a transparent metal layer.

According to the invention described in claim 1, since the coating agent is formed so as to cover from the outer peripheral end of the light control sheet to the outer peripheral end of the first transparent panel and the other surface, the light control sheet is sealed. In addition, moisture permeability barrier properties (waterproofness) can be secured, and for example, entry of water or the like into the light control sheet or between the light control sheet and the first transparent panel can be prevented. In particular, even when an external force along the thickness direction acts on the joint portion between the outer peripheral end of the transparent panel and the sealing agent, it is possible to prevent the coating agent from peeling off.
In this case, since the outer peripheral end of the light control sheet can be disposed closer to the outer peripheral end of the first transparent panel, the region where the light control sheet is disposed on the first transparent panel (light incident on the panel with the light control sheet) The dimming area where the light is dimmed can be enlarged. Therefore, as compared with the conventional configuration in which the outer region of the light control sheet is covered with black ceramics or the like, it is possible to maintain a good appearance while securing the visual field region.

  According to the invention described in claim 2, since the outer peripheral end portion of the light control sheet is disposed at the same position as the outer peripheral end portion of the first transparent panel in the surface direction, on the one surface of the first transparent panel. A light control sheet is provided throughout. Therefore, the whole panel with a light control sheet can be used as a light control region.

According to the invention described in claim 3, since the coating agent is formed over the entire other surface of the first transparent panel, the peeling of the coating agent can be prevented more reliably.
Furthermore, since the outer peripheral end of the first transparent panel and the light control sheet can be coated simultaneously with the coating of the other surface of the first transparent panel, workability can be improved.

  According to the invention described in claim 4, since the outer ends of the first transparent panel, the light control sheet, and the second transparent panel can be integrally covered with the coating agent, the light control sheet is sandwiched between the transparent panels. Even when a laminated panel is employed, moisture permeability barrier properties can be secured. This can prevent water and the like from entering between the transparent panels.

According to the fifth aspect of the invention, on the first end side of the light control sheet, the outer peripheral end of each transparent panel and the first end of the light control sheet are arranged at the same position in the surface direction. The light control area can be secured up to the outer peripheral edge of the transparent panel.
On the other hand, on the second end side of the light control sheet, each transparent panel can be directly joined by an intermediate film such as an adhesive without using the light control sheet, so that the adhesion of each transparent panel can be improved. it can.

  According to the sixth aspect of the present invention, the light control region can be secured up to the tip in the ascending / descending direction that easily enters the user's field of view, so that the appearance can be maintained well and the tip that is relatively difficult to enter the user's field of view. Adhesiveness of each transparent panel can be improved using a part other than the part.

According to the invention described in claim 7, since the entire surface of the second transparent panel opposite to the surface to which the light control sheet is bonded is covered with the coating agent, the coating agent is more reliably peeled off. Can be prevented.
Furthermore, since the outer peripheral edge of each transparent panel and the light control sheet can be coated at the same time as the coating on the opposite side of the surface of the second transparent panel to which the light control sheet is bonded, work such as masking is unnecessary. Thus, workability can be improved.

  According to the invention described in claim 8, since the coating agent is not heated at the time of coating, it is possible to prevent the light control sheet from being damaged by heat.

  According to the invention described in claim 9, by covering the outer peripheral end of the first transparent panel and the outer peripheral end of the light control sheet with the transparent metal layer, the moisture permeability barrier property of the light control sheet can be further improved. In addition, the infrared rays incident on the panel with the light control sheet can also be absorbed.

It is a side view of the vehicle which employ | adopted the panel with a light control sheet | seat of this invention. It is a disassembled perspective view of the door window in this embodiment. It is sectional drawing of the door window in this embodiment. It is sectional drawing of the light control sheet | seat in this embodiment. It is sectional drawing of the door window which shows the other structure in this embodiment. It is sectional drawing of the door window which shows the other structure in this embodiment. It is sectional drawing of the door window which shows the other structure in this embodiment. It is sectional drawing of the door window which shows the other structure in this embodiment. It is sectional drawing of the door window which shows the other structure in this embodiment. It is sectional drawing of the door window which shows the other structure in this embodiment. It is a top view of the door window which shows the other structure in this embodiment.

Next, embodiments of the present invention will be described with reference to the drawings. In addition, in the following description, the case where the panel with a light control sheet | seat of this invention is employ | adopted for the door window 3 of the front door 2 in the vehicle 1 is demonstrated.
(Door structure)
FIG. 1 is a side view of the vehicle.
As shown in FIG. 1, the front door 2 is attached so that the door opening 4 on the side of the vehicle body can be opened and closed, and the door main body 11 and the door window (panel with light control sheet) 3 can be raised and lowered. And a sash member 12 to be held. The sash member 12 includes a lower sash 13 housed inside the door body 11, and an upper sash 14 provided on an upper portion of the door body 11 and constituting a window frame together with an upper edge portion of the door body 11. The door window 3 is guided on each of the sashes 13 and 14 by driving means (not shown) and moves up and down so as to open and close the window frame.

(Door window)
FIG. 2 is an exploded perspective view of the door window 3, and FIG. 3 is a cross-sectional view of the door window 3.
As shown in FIGS. 2 and 3, the door window 3 of the present embodiment includes a first glass layer (first transparent panel) 21 and a second glass layer (second transparent panel) 22 that face each other in the thickness direction, The light control sheet 23 arrange | positioned between these glass layers 21 and 22 and the coating agent 24 (refer FIG. 4) which seals the light control sheet 23 between the glass layers 21 and 22 are provided.

FIG. 4 is a cross-sectional view of the light control sheet 23.
As shown in FIG. 4, the light control sheet 23 is formed on a pair of film members 31 and 32 that face each other in the thickness direction, and on each facing surface (a surface located on the inner side in the thickness direction) of each film member 31 and 32. The transparent electrode layers 33 and 34 formed in the above and the dimming layer 37 sandwiched between the film members 31 and 32 via the transparent electrode layers 33 and 34.

As the film members 31 and 32, for example, a material having insulating properties and light transmission properties such as PET (polyethylene terephthalate) is preferably used.
Each of the transparent electrode layers 33 and 34 is made of ITO or the like, and is connected to a power source (not shown) via lead wires 35 and 36 (see FIG. 2), respectively.

  The light control layer 37 is made of liquid crystal or the like. By applying a voltage between the transparent electrode layers 33 and 34, the coloring condition is changed, and the transmittance of light transmitted through the light control sheet 23 is adjusted. It has become. In addition, you may comprise the light control layer 37 as a SPD (Suspended Particle Device) layer with the matrix resin in which the microcapsule which enclosed the light distribution particle was disperse | distributed.

The light control sheet 23 configured as described above has an intermediate film 41, between the first glass layer 21 and the second glass layer 22, respectively, in a state in which the thickness direction thereof matches the glass layers 21 and 22. 42 (for example, PVB (polyvinyl butyral) or the like).
In the following description, two flat surfaces perpendicular to the thickness direction of the glass layers 21 and 22, i.e., the outer peripheral end surfaces (edge surfaces) along the thickness direction of the glass layers 21 and 22, and the outer peripheral end surfaces. Of the two planes orthogonal to the surface, the surfaces located on the inner side in the thickness direction (light control sheet 23 side) are the one surfaces 21a and 22a, and the surface located on the outer side in the thickness direction (the side opposite to the light control sheet 23). The other surfaces 21b and 22b are used. In this case, the one surfaces 21a and 22a (the back surface of the first glass layer 21 and the surface of the second glass layer 22 in the figure) of the glass layers 21 and 22 are opposed to each other in the thickness direction. Intermediate films 41 and 42 are interposed between 22a and the light control sheet 23, respectively.

  And in this embodiment, the 1st glass layer 21, the intermediate film 41, the light control sheet 23, the intermediate film 42, and the 2nd glass layer 22 comprise the laminated body 51 laminated | stacked in the thickness direction in this order. In this case, the outer peripheral end surfaces (outer peripheral end portions) of the glass layers 21 and 22 and the intermediate films 41 and 42 and the outer peripheral end surface (outer peripheral end portion) of the light control sheet 23 are arranged flush with each other. The outer peripheral end surface of 51 is comprised.

  Here, the coating agent 24 is formed so as to cover the entire laminate 51. Specifically, the coating agent 24 includes the other surfaces 21b and 22b of the first glass layer 21 and the second glass layer 22 in the laminate 51 (the front surface of the first glass layer 21 and the back surface of the second glass layer 22 in the figure). ) And is formed over the entire outer peripheral end surface of the laminate 51 (the outer peripheral end surfaces of the glass layers 21 and 22, the intermediate films 41 and 42, and the light control sheet 23). Thereby, the light control sheet 23 is sealed between the glass layers 21 and 22.

  The coating agent 24 is a transparent material and has a moisture permeable barrier property, water repellency, adhesion to the glass layers 21 and 22, wear resistance when sliding up and down the door window 3, sliding property, collision A material excellent in impact resistance at the time is preferable. As such a material, it is preferable to employ an ultraviolet curable resin, a thermosetting resin, or the like used as a coating agent for a transparent panel. In particular, the coating agent 24 employed in the present embodiment preferably employs an ultraviolet curable resin in consideration of the heat resistance of the light control sheet 23.

Thus, in the present embodiment, the entire laminate 51 including the outer peripheral end face of the light control sheet 23 is configured to be covered with the coating agent 24.
According to this configuration, after the light control sheet 23 is sealed between the glass layers 21 and 22, the moisture permeable barrier property is secured, for example, in the light control sheet 23 or between the glass layers 21 and 22. Ingress of water and the like can be reliably prevented. In particular, since the laminated body 51 is covered with the coating agent 24 from the other surfaces 21b and 22b to the outer peripheral end face, for example, an external force along the thickness direction acts on a joint portion between the outer peripheral end face of the laminated body 51 and the sealing agent 24. Even in this case, the coating agent 24 can be prevented from peeling off.

  As a result, the outer peripheral end face of the light control sheet 23 can be disposed closer to the outer peripheral end faces of the glass layers 21 and 22, so that the region where the light control sheet 23 is disposed on the glass layers 21 and 22 (light incident on the door window 3) The dimming area where the light is dimmed can be enlarged. Therefore, as compared with the conventional configuration in which the outer region of the light control sheet is covered with black ceramics or the like, it is possible to maintain a good appearance while securing the visual field region. In this case, in this embodiment, since the outer peripheral end surface of the light control sheet 23 is arrange | positioned with the outer peripheral end surface of the glass layers 21 and 22, the light control sheet 23 over the glass layers 21 and 22 whole. Will be provided. Therefore, the whole door window 3 can be used as a light control region.

  Further, by covering the entire laminated body 51 with the coating agent 24, the outer peripheral end face can be coated simultaneously with the coating on the other surfaces 21b and 22b of the laminated body 51. In this case, unlike the case where the coating agent 24 is formed only on a part of the laminated body 51, for example, masking or the like is not necessary, so that workability can be improved.

  Moreover, in this embodiment, since the coating agent 24 which consists of ultraviolet curable resin is employ | adopted, since the coating agent 24 is not heated at the time of coating, it can prevent that the light control sheet 23 is damaged by a heat | fever. .

  The technical scope of the present invention is not limited to the above-described embodiments, and includes those in which various modifications are made to the above-described embodiments without departing from the spirit of the present invention. In other words, the configuration described in the above-described embodiment is merely an example, and can be changed as appropriate.

For example, in the above-described embodiment, the configuration in which the coating agent 24 is formed over the entire laminate 51 has been described. However, at least the outer peripheral end surface of the first glass layer 21 and the other surface 21b from the outer peripheral end surface of the light control sheet 23. It suffices if the coating agent 24 is formed over the outer peripheral portion.
For example, as shown in FIG. 5, only the end of the laminated body 51, that is, the outer peripheral end surface of the laminated body 51 and the outer peripheral portions of both surfaces of the laminated body 51 are covered (the other surfaces 21 b and 22 b in the glass layers 21 and 22. The coating agent 24 may be formed so as to avoid the central portion of the coating agent 24).
Also, as shown in FIG. 6, the entire other surface 21 b of the first glass layer 21, the outer peripheral end surface of the stacked body 51, and the outer peripheral portion of the other surface 22 b of the second glass layer 22 are covered. You may form the coating agent 24 (so that the center part of the other surface 22b in the 2nd glass layer 22 may be avoided).

In the embodiment described above, the configuration in which the laminate 51 is covered only with the coating agent 24 has been described. However, the present invention is not limited to this, and for example, as shown in FIG. A configuration in which the laminated body 51 is covered with 61 may be used.
In this case, after covering the laminate 51 with the coating agent 24 as in the above-described embodiment, the transparent metal layer 61 is formed on the coating agent 24 by vapor deposition, sputtering, or the like. Thereafter, the coating agent 24 is formed again on the transparent metal layer 61.
According to this configuration, by covering the laminate 51 with the transparent metal layer 61, the moisture permeability barrier property of the light control sheet 23 can be further improved, and infrared rays incident on the door window 3 can also be absorbed. .
And since the coating agent 24 is formed between the transparent metal layer 61 and the laminated body 51, the short circuit between the transparent metal layer 61 and the light control sheet 23 (transparent electrode layer 33, 34) can be prevented. . Furthermore, since the coating agent 24 is formed again on the transparent metal layer 61, the slidability when the door window 3 is raised and lowered can be secured.

Alternatively, the transparent metal layer 61 may be formed together with the coating agent 24 by dispersing fine particles such as ITO in the coating agent 24, and the transparent metal layer 61 may be disposed in the coating agent 24.
In this case, it is preferable to employ a material having a volume electrical resistance value of 10 ⁶ Ω · cm or more as the material of the coating agent 24. Thereby, after preventing the short circuit between the transparent metal layer 61 and the light control sheet 23 (transparent electrode layers 33 and 34), the infrared rays which enter the door window 3 can also be absorbed.
Moreover, as shown in FIGS. 8 and 9, the above-described transparent metal layer 61 may be employed in the above-described configurations of FIGS.

Moreover, although embodiment mentioned above demonstrated the case where the panel with a light control sheet | seat of this invention was employ | adopted as the laminated glass by which the light control sheet | seat 23 was clamped between the two glass layers 21 and 22, it is restricted to this. Absent.
For example, as shown in FIG. 10, the light control sheet 23 is bonded to one surface 21 a (back surface) of the first glass layer 21 via the adhesive layer 52, and the first glass layer 21 and the light control sheet 23 are covered. Thus, the coating agent 24 may be formed. Even in this case, the coating agent 24 may be formed at least from the outer peripheral end surface of the light control sheet 23 to the outer peripheral end surface of the first glass layer 21 and the outer peripheral portion of the other surface 21b.

Moreover, although embodiment mentioned above demonstrated the case where the panel with a light control sheet | seat of this invention was employ | adopted for the door window 3, it is not restricted to this but is employable for various panels.
Moreover, although embodiment mentioned above demonstrated the case where glass was employ | adopted as a transparent panel, not only this but various materials (for example, resin material etc.) are employable.
Furthermore, in the above-described embodiment, the case where the outer peripheral end face of the light control sheet 23 and the outer peripheral end face of the glass layers 21 and 22 are disposed flush with each other is not limited thereto, but the outer peripheral end face of the light control sheet 23 is not limited to this. You may arrange | position inside the outer peripheral end surface of the glass layers 21 and 22. FIG.

Furthermore, in the above-described embodiment, the configuration in which the outer peripheral end surface of the light control sheet 23 is disposed flush with the outer peripheral end surfaces of the glass layers 21 and 22 is not limited thereto. Of these, it is also possible to adopt a configuration in which at least a part is arranged flush.
For example, as shown in FIG. 11, the outer peripheral end surface (first end portion 23 a) of the light control sheet 23 is the surface and the outer peripheral end surface of the glass layers 21, 22 at the upper side portion (tip portion) of the door window 3. The outer peripheral end surface (second end portion 23b) of the light control sheet 23 is disposed inside the outer peripheral end surfaces of the glass layers 21 and 22 at the other end portions (lower side portion and side side portion). You may make it a structure.

According to this configuration, since the outer peripheral end surfaces of the glass layers 21 and 22 and the outer peripheral end surface of the light control sheet 23 are arranged flush with each other at the upper side portion of the door window 3 in the up-and-down direction, Dimming area can be secured.
On the other hand, in the edge part other than the upper side part of the raising / lowering direction in the door window 3, in the state which avoided the light control sheet | seat 23, each glass layers 21 and 22 are intermediate films, such as an adhesive agent (intermediate films 41 and 42 mentioned above, etc.). Can be joined directly.
Therefore, after improving the appearance at the upper side of the elevating direction that is easy to enter the user's field of view, the adhesion of the glass layers 21 and 22 is improved by using parts other than the upper side that are relatively difficult to enter the user's field of view. Can be made.

DESCRIPTION OF SYMBOLS 1 ... Vehicle 3 ... Door window (panel with a light control sheet) 21 ... 1st glass layer (1st transparent panel) 21a ... One side 21b ... Other side 22 ... 2nd glass layer (2nd transparent panel) 23 ... Light control Sheet 23a ... first end 23b ... second end 24 ... coating agent

Claims (9)

A panel with a light control sheet provided with a light control sheet on one side of the first transparent panel,
A light-transmitting coating agent is formed so as to cover from the outer peripheral edge of the light control sheet to the outer peripheral edge of the first transparent panel and the other surface of the first transparent panel. Panel with light sheet.   2. The panel with a light control sheet according to claim 1, wherein an outer peripheral end portion of the light control sheet is disposed at the same position in a surface direction as an outer peripheral end portion of the first transparent panel.   The panel with a light control sheet according to claim 1, wherein the coating agent covers the entire other surface of the first transparent panel. Of the light control sheet, a second transparent panel is bonded to a surface opposite to a surface bonded to the first transparent panel,
The panel with a light control sheet according to any one of claims 1 to 3, wherein the coating agent covers an outer peripheral end portion of the second transparent panel. The outer peripheral end of the light control sheet is a first end disposed at the same position in the surface direction with respect to the outer peripheral ends of the first transparent panel and the second transparent panel;
A second end disposed inside the surface direction with respect to the outer peripheral ends of the first transparent panel and the second transparent panel, and
The panel with a light control sheet according to claim 4, wherein the first transparent panel and the second transparent panel are joined in a state avoiding the light control sheet on the second end side. The panel with light control sheet is a vehicle door window that can be raised and lowered,
The first end portion of the light control sheet is set to a front end portion in the up and down direction of the outer peripheral end portion of the panel with the light control sheet, and the second end portion is set to a portion other than the front end portion. The panel with a light control sheet according to claim 4 or 5, wherein the panel has a light control sheet.   The said coating agent has covered the whole surface on the opposite side to the surface where the said light control sheet | seat was joined among said 2nd transparent panels, The any one of Claim 4-6 characterized by the above-mentioned. A panel with a light control sheet as described in 1.   The panel with a light control sheet according to any one of claims 1 to 7, wherein the coating agent is made of an ultraviolet curable resin.   9. The light control according to claim 1, wherein an outer peripheral end of the first transparent panel and an outer peripheral end of the light control sheet are covered with a transparent metal layer. Panel with sheet.

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