JP2012145888A - Light adjustment composite plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light adjustment composite plate in which heat is hardly stored and a predetermined shape appears and disappears when adjusting the amount of light by providing the predetermined shape to a polarizing film.SOLUTION: A light adjustment composite plate 20 includes: a first sheet 21 obtained by alternately arranging a first reflective polarizing film, which substantially reflects light having first polarized light and substantially transmits light having second polarized light, and a second reflective polarizing film, which substantially transmits the light having the first polarized light and substantially reflects the light having the second polarized light, in the same shape on a surface of a transparent substrate; and a second sheet 22 obtained by alternately arranging the first reflective polarizing film and the second reflective polarizing film in the same shape on the surface of the transparent substrate. The first sheet and the second sheet are movable in a direction where the first reflective polarizing film and the second reflective polarizing film are alternately arranged.

Description

  The present invention relates to a composite plate that adjusts the amount of light. More specifically, the present invention provides a composite plate that adjusts the amount of light transmission by changing the relative position of two sheets.

  Conventionally, the amount of transmitted light has been adjusted for the purpose of ensuring privacy, reducing heat accumulation in a room, and adjusting the brightness of a lighting fixture.

  For example, Patent Document 1 describes a light valve including a polarizing element that can control transmission of light by rotating at least one polarizing element about an axis in a plane.

  Patent Document 2 discloses a configuration in which a pair of laminated glasses formed by interposing and adhering a polarizing film having a polarization axis arranged in a required direction to a glass plate bonding portion are faced close to each other, and at least one laminated glass is moved in a faced state. A laminated glass composite characterized in that is described. As the polarizing film described in Patent Document 2, a film obtained by mixing iodine into a resin such as Poval and forcibly aligning it is used. When this polarizing film is used, there is a problem that heat is accumulated in the film itself because light that vibrates in a certain direction is transmitted and light having other vibration surfaces is absorbed.

  On the other hand, there is a need for a composite plate with more design than simply adjusting the amount of light when adjusting the amount of transmitted light.

JP-T-2001-526406 Published Utility Heisei 2-87039

  The present invention has been made to prevent the above problem that heat is accumulated in the polarizing film itself. In addition, the weight of the composite plate can be reduced.

  The light adjusting composite plate of the present invention substantially reflects the light having the first polarization and substantially transmits the light having the second polarization, and substantially transmits the light having the first polarization. The first reflective polarizing film and the second reflective property, wherein the second reflective polarizing film that substantially reflects the light having the second polarized light has the same shape and are alternately disposed on the surface of the transparent substrate. The polarizing film has second sheets alternately arranged on the transparent substrate surface in the same shape, and the first sheet and the second sheet are the first reflective polarizing film and the first sheet. It can move in the direction of alternate arrangement with the two reflective polarizing film.

It is the figure which showed typically the perspective view of the 1st sheet | seat which concerns on one embodiment of this invention. It is the figure which showed typically the cross section of the light adjustment composite board which concerns on one embodiment of this invention. It is the schematic diagram which moved the 2nd sheet | seat of FIG. 2 to the alternate arrangement direction of the 1st and 2nd reflective polarizing film. It is the figure which showed typically the front view of the 2nd sheet | seat which concerns on one embodiment of this invention. It is the figure which showed typically the cross section of the light adjustment composite board which concerns on one embodiment of this invention. It is the schematic diagram which moved the 2nd sheet | seat of FIG. 5 to the alternating arrangement direction of the 1st and 2nd reflective polarizing film. It is the figure which showed typically the front view of the 2nd sheet | seat which concerns on one embodiment of this invention. It is the figure which showed typically the cross section of the light adjustment composite board which concerns on one embodiment of this invention. It is the schematic diagram which moved the 2nd sheet | seat of FIG. 8 to the alternating arrangement direction of the 1st and 2nd reflective polarizing film. It is the photograph which image | photographed the light adjustment composite board from the position of the observer 26 of FIG. It is the photograph which image | photographed the light adjustment composite board from the position of the observer 26 of FIG. It is the photograph which image | photographed the light adjustment composite board from the position of the observer 26 of FIG. It is the photograph which image | photographed the light adjustment composite board from the position of the observer 26 of FIG. It is the photograph which image | photographed the light adjustment composite board from the position of the observer 26 of FIG. It is the photograph which image | photographed the light adjustment composite board from the position of the observer 26 of FIG.

  An embodiment of a light adjusting composite plate of the present invention will be described below with reference to the drawings.

  In the first sheet 10, the first reflective polarizing film 13 having the transmission axis 11 in a direction that substantially transmits light having the second polarized light is cut into a strip shape and disposed on the surface of the transparent substrate 15. The second reflective polarizing film 14 having the polarization transmission axis 12 in a direction that substantially transmits light having the first polarized light is cut into the same strip shape as the first reflective polarizing film, and is disposed on the surface of the transparent substrate 15. ing. The first reflective polarizing film and the second reflective polarizing film are alternately arranged. These may be disposed on the surface of the transparent substrate 15 via the adhesive layer 16.

  As the reflective polarizing film, a laminate of at least two kinds of polymer films, a laminate integrated product of a film made of cholesteric liquid crystal and a quarter-wave plate, a wire grid structure product having fine irregularities, and the like are used. For example, trade name NIPOCS (registered trademark) manufactured by Nitto Denko Corporation, trade name ProFlux (registered trademark) manufactured by Moxtek, and trade name DBEF-Q manufactured by 3M can be used. The thickness is not particularly limited, but a thickness of 20 micrometers to 500 micrometers may be used.

  As the transparent substrate, a glass plate, a resin substrate (polycarbonate plate, acrylic plate, or the like) can be used, and the light transmittance of the transparent substrate is preferably 80% or more. When a lighter light adjustment composite plate is required, a glass substrate may be used instead of a resin substrate.

  In order to reduce the weight, in the present invention, the reflective polarizing film does not have a structure in which it is interposed between two transparent substrates. By making it the structure affixed on the transparent substrate of 1 sheet, it is light compared with the intervention sticking structure which requires two transparent substrates.

  The transmission axis 11 of the first reflective film and the transmission axis 12 of the second reflective film are preferably arranged in a direction orthogonal to each other. This is because light in all directions can be reflected when the transmission axes are orthogonal to each other.

  In this specification, “substantially reflecting” means that 80% or more, preferably 90% or more of light is reflected with respect to incident light having a certain vibration surface. “Substantially transmitting” means that 80% or more, preferably 90% or more, of light having a certain vibration surface is transmitted.

  The transmittance and reflectance are measured using, for example, a spectrophotometer MPC-3100 manufactured by Shimadzu Corporation. The transmittance at the time of passing through the polarizing film is set to 100%. Next, after the polarizing film, a reflective polarizing film is set so as to have the same transmission axis as that of the polarizing film, and the transmittance is measured. Moreover, a reflective polarizing film is set so that a transmission axis may be orthogonal to the polarizing film mentioned above, and a reflectance is estimated from the transmittance data.

  The second sheet may be produced in the same manner as the first sheet, or may be produced by arranging the first reflective polarizing film and the second reflective polarizing film in reverse.

  The first sheet and the second sheet can be disposed so that the transparent substrates are opposed to each other, or can be disposed so that the transparent substrate and the reflective polarizing film are opposed to each other, as shown in FIG. Thus, you may arrange | position so that reflective polarizing films may oppose. This is because the reflective polarizing film is arranged on the inner side, so that the weather resistance is high and the reflective polarizing film is difficult to peel off from the transparent substrate. In particular, when using a resin substrate instead of a glass plate as a transparent substrate, it is necessary to adjust a resin whose polarization is not easily broken, and the adjustment is difficult, but the reflective polarizing films should be arranged to face each other. And since there is no transparent substrate between reflective polarizing films, there also exists an advantage that polarization | polarized-light is not destroyed by a transparent substrate.

  FIG. 2 shows a light adjustment composite plate 20 in which a first sheet 21 and a second sheet 22 produced in the same manner are arranged so that the reflective polarizing films 23 face each other. When superposed as shown in FIG. 2, since the transmission axes of the reflective polarizing films 23 of the first sheet 21 and the second sheet 22 are aligned, the light 25 having a vibration surface parallel to the transmission axis. Can be read, and the character “Light Control Window” on the card 24 placed under the light adjustment composite plate 20 can be read when viewed from the observer 26.

  FIG. 3 shows a light adjustment composite plate 30 in which the second sheet 22 is moved in parallel with the first sheet 21 by the width of a strip-like reflective polarizing film. In this case, since the reflective polarizing films having different transmission axes overlap with each other, the light 27 having a certain vibration surface passes through the first sheet 21 and is then reflected by the second sheet 22 and viewed from the observer 26. The character “Light Control Window” on the card 24 placed under the light adjustment composite plate 30 cannot be read.

  In addition, if the reflective polarizing film is the same shape, it is good also as various shapes, such as an ellipse, a circle | round | yen, and a triangle other than strip shape. In the case of a strip shape, if the long side portions of the first reflective polarizing film and the second reflective polarizing film are arranged in contact with each other as shown in FIG. Even if circles, triangles, and the like are alternately arranged, a part of the surface of the transparent resin substrate is covered. As described above, by using a reflective polarizing film having a shape that covers only a part of the surface of the transparent resin substrate even when alternately arranged in the same shape, the first sheet and the second sheet are arranged in the alternate arrangement direction. When moved, these ellipses, circles, triangles, etc. may or may not be observed. For this reason, the composite board which was rich in design property can be provided.

  Next, another embodiment of the light adjustment composite plate of the present invention will be described with reference to the drawings.

  The first sheet 21 is produced in the same manner as described above. In the second sheet 40, as shown in FIG. 4, the first reflective polarizing film 43 and the part 45 of the second reflective polarizing film 44 arranged alternately are cut into a predetermined shape (star shape). ing.

  FIG. 5 shows a light adjustment composite plate 50 in which the first sheet 21 and the second sheet 40 are arranged so that the reflective polarizing films face each other. In this case, the portion 51 where the reflective polarizing films of the first sheet 21 and the second sheet 40 overlap with each other has the transmission axes of the reflective polarizing films aligned so that the light 53 having a certain vibration surface is obtained. Light 54 having a certain vibration surface is also transmitted through the portion 52 where only the reflective polarizing film of the first sheet 21 exists. Since both transmit light, a predetermined shape (star shape) is not observed.

  In the light adjustment composite plate 60 (FIG. 6) in which the second sheet 40 is moved in parallel with the first sheet 21 by the width of the strip-shaped reflective polarizing film, the reflective polarizing film having different transmission axes. The light 64 having a certain vibration surface in the overlapping portion 61 is reflected by the second sheet 40 after passing through the first sheet 21. On the other hand, the light 63 having a certain vibration surface is transmitted through the portion 62 where only the reflective polarizing film of the first sheet 21 exists. As a result, a light transmitting part and a reflecting part can be formed on the light adjusting composite plate, and a predetermined shape (star shape) is observed.

  Further, another embodiment of the light adjusting composite plate of the present invention will be described below with reference to the drawings.

  The first sheet 21 is produced in the same manner as described above. As shown in FIG. 7, in the second sheet 70, a part of the reflective polarizing film is cut into a predetermined shape (star shape) in the same manner as described above, and further, the portion where the first reflective polarizing film is cut The 2nd reflective polarizing film 71 is arrange | positioned, and the 1st reflective polarizing film 72 is arrange | positioned in the part from which the 2nd reflective polarizing film was cut | disconnected.

  FIG. 8 shows a light adjustment composite plate 80 in which the first sheet 21 and the second sheet 70 are arranged so that the reflective polarizing films face each other. In this case, the light 83 having a certain vibration surface is transmitted through the portion 81 where the transmission axes of the reflective polarizing films of the first sheet 21 and the second sheet 70 are aligned, and is separated by the second sheet 70. In the portion 82 where the reflective polarizing film is disposed, the light 84 having a certain vibration surface is transmitted through the first sheet 21 and then reflected by the second sheet 70, so that a predetermined shape (star shape) is observed. Is done.

  In the light adjustment composite plate 90 (FIG. 9) in which the second sheet 70 is moved in parallel with the first sheet 21 by the width of the strip-shaped reflective polarizing film, the reflective polarizing film having different transmission axes. The light 93 having a certain vibration surface in the overlapping portion 91 is transmitted by the first sheet 21 and then reflected by the second sheet 70. On the other hand, the light 94 having a certain transmission axis is transmitted through a portion 92 where another reflective polarizing film is disposed on the second sheet 70. As a result, a light transmitting part and a reflecting part can be formed on the light adjusting composite plate, and a predetermined shape (star shape) is observed.

  As for the predetermined shape, in addition to a star shape, various shapes can be adopted as long as the effect of the present invention is not impaired, such as a circle, a triangle, a square.

Examples of the present invention are shown below, but the present invention is not limited thereto.
Example 1
An acrylic adhesive of 150 mm × 200 mm × 0.027 mm was laminated on an acrylic plate of 150 mm × 200 mm × 1.50 mm.

  Next, a reflective polarizing film (3M product name: DBEF-Q) was cut into strips (150 mm × 25 mm) so that the transmission axis was in the long side direction, and this was laminated on the surface of the adhesive layer. (First reflective polarizing film).

  Except for cutting the reflective polarizing film so that the transmission axis is in the short side direction, the reflective polarizing film is applied to the surface of the pressure-sensitive adhesive layer so as to contact the long side of the first reflective polarizing film in the same manner as described above. Laminated (second reflective polarizing film).

  Similarly, the first sheet was obtained by alternately laminating the first reflective polarizing film and the second reflective polarizing film so that the long sides thereof were in contact with each other.

  The second sheet is produced in the same manner as the first sheet, and the first sheet and the reflective polarizing film are opposed to each other and the transmission axes of the respective reflective polarizing films are aligned as shown in FIG. The 2nd sheet | seat was arrange | positioned and the light adjustment composite board of the present Example was produced. A photograph of this light adjustment composite plate taken from the position of the observer 26 in FIG. 2 is shown in FIG. Because the light is transmitted, the characters on the card placed below can be read.

  Next, as shown in FIG. 3, the first sheet was moved 25 mm (width of the strip-like reflective polarizing film) in the alternately arranged direction of the first reflective polarizing film and the second reflective polarizing film. A photograph of this light adjusting composite plate taken from the position of the observer 26 in FIG. 3 is shown in FIG. Since the reflective polarizing films having different transmission axes overlap each other, the light is reflected, and the characters on the card placed under the observer 26 cannot be read, and the light is reflected, so that the mirror surface is observed.

Example 2
A first sheet was produced in the same manner as in Example 1. A second sheet was prepared in the same manner as in Example 1 except that a part of the first reflective polarizing film and the second reflective polarizing film was cut into a star shape as described in FIG.

  As shown in FIG. 5, the first sheet and the second sheet are arranged so that the reflective polarizing films face each other and the transmission axes of the respective reflective polarizing films are aligned. Produced. The photograph which image | photographed this light adjustment composite board similarly to Example 1 is shown in FIG. The light is transmitted through the portion where the transmission axes of the reflective polarizing films of the first sheet and the second sheet are aligned, and the light is transmitted through the portion where only the reflective polarizing film of the first sheet is present. No star shape was observed.

  Next, as shown in FIG. 6, the first sheet was moved by 25 mm (the width of the strip-shaped reflective polarizing film) in the alternately arranged direction of the first reflective polarizing film and the second reflective polarizing film. A photograph of this light adjusting composite plate taken in the same manner as in Example 1 is shown in FIG. Light is reflected at portions where the reflective polarizing films having different transmission axes overlap, and light is transmitted at portions where only the reflective polarizing film of the first sheet exists, so that light is transmitted on the light adjustment composite plate. A part and a reflective part were made, and a star shape was observed.

Example 3
A first sheet was produced in the same manner as in Example 1. As shown in FIG. 7, a part of the first reflective polarizing film and the second reflective polarizing film is cut into a star shape, and the second reflective polarized light is cut in the part where the first reflective polarizing film is cut. A second sheet was prepared in the same manner as in Example 1 except that the film was provided with the first reflective polarizing film at the portion where the second reflective polarizing film was cut.

  As shown in FIG. 8, the first sheet and the second sheet are arranged so that the reflective polarizing films are opposed to each other and the transmission axes of the respective reflective polarizing films are aligned, and the light adjusting composite plate of this example is formed. Produced. The photograph which image | photographed this light adjustment composite board similarly to Example 1 is shown in FIG. Light is transmitted through a portion where the transmission axes of the reflective polarizing films of the first sheet and the second sheet are aligned, and light is reflected at a portion where another reflective polarizing film is disposed on the second sheet. A star shape was observed.

  Next, as shown in FIG. 9, the first sheet was moved by 25 mm (the width of the strip-shaped reflective polarizing film) in the direction in which the first reflective polarizing film and the second reflective polarizing film were alternately arranged. The photograph which image | photographed this light adjustment composite board similarly to Example 1 is shown in FIG. Light is reflected at portions where the reflective polarizing films having different transmission axes overlap. On the other hand, light is transmitted through a portion where another reflective polarizing film is disposed on the second sheet. As a result, a light transmitting portion and a reflecting portion can be formed on the light adjusting composite plate, and a star shape was observed.

10, 21 First sheet 22, 40, 70 Second sheet 13, 43 First reflective polarizing film 14, 44 Second reflective polarizing film 15 Substrate 20, 30, 50, 60, 80, 90 Light adjustment composite Board

Claims (5)

A first reflective polarizing film that substantially reflects light having the first polarization and substantially transmits light having the second polarization; and substantially transmits light having the second polarization and substantially transmits light having the first polarization. A first sheet in which the second reflective polarizing film to be reflected is alternately arranged on the transparent substrate surface in the same shape;
The first reflective polarizing film and the second reflective polarizing film have second sheets alternately arranged on the transparent substrate surface in the same shape,
The light adjustment composite plate in which the first sheet and the second sheet are movable in an alternating arrangement direction of the first reflective polarizing film and the second reflective polarizing film.   The light adjustment composite plate according to claim 1, wherein the first reflective polarizing film and the second reflective polarizing film are disposed so as to face each other.   The light adjusting composite plate according to claim 1, wherein the transparent substrate is a resin substrate.   The part of the first reflective polarizing film and the part of the second reflective polarizing film of the second sheet are cut into a predetermined shape according to any one of claims 1 to 3. Light adjustment composite board.   The second reflective polarizing film is disposed at a cut portion of the first reflective polarizing film cut into a predetermined shape, and the first reflective polarizing film cut at a predetermined shape is cut into the first reflective polarizing film. The light adjustment composite plate according to claim 1, comprising the second sheet on which a reflective polarizing film is disposed.