JPH0446476Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a window used in a building or the like to control sunlight or line of sight from outside.

[Summary of the idea]

This invention is used in windows that control light used in buildings, etc., to selectively scatter only incident light within a predetermined angle range with respect to the film, and transmit incident light at other angles. By depositing a light control film on or between glass or transparent plastic,
It is designed to scatter sunlight entering the room and obstruct the view of others from outside.

[Conventional technology]

Conventionally, curtains, blinds, frosted glass, colored glass, light reflective glass, etc. have been used to control sunlight entering a room.

[Problem that the invention attempts to solve]

However, conventional windows that control sunlight have problems in that they obstruct the view of people inside the room and reduce the transmittance when looking outside. Another problem is that it is impossible to obstruct the line of sight of other people walking outdoors, for example, on the road or in other buildings.

This invention focuses on the above-mentioned problems with conventional window materials that control sunlight. This project proposes a window material that looks exactly the same.

[Means for solving the problem]

That is, the building window of the present invention selectively scatters only incident light within a predetermined angle range with respect to the film, and transmits incident light at other angles.A light control film is attached to a glass or transparent plastic surface. Alternatively, it is composed of a laminate obtained by adhering it between glass or transparent plastic. The predetermined angle range is, for example, within a range of 20 to 90 degrees upward when measured from the horizontal direction in a direction perpendicular to the window from the inside. However, it is precisely determined by the altitude of the sun. Further, the predetermined angle range is, for example, within a range of 20 to 90 degrees downward when measured from the horizontal direction in a direction perpendicular to the window from the inside. More precisely, it is determined from the position of the line of sight of other people outdoors. Furthermore, the predetermined angle range is within a range of 30° or less when measured from the inside of the building to the outside, from the horizontal direction to the window material, up and down. In this case, for example, the line of sight of others from a position on the opposite side at approximately the same height can be blocked. Further, the predetermined angle range is within a range of 30 to 90 degrees when measured from the inside of the building to the outside, perpendicular to the window material, from the vertical direction to at least one of the left and right sides. In this case, for example, the line of sight of others from a diagonally facing position can be blocked. Further, the predetermined angle range is perpendicular to the window material from the inside of the building to the outside, and is within a range of 30° in each direction from the vertical direction. In this case, for example, it is possible to block the line of sight of others who are at the same height or a different height on the opposite side.

In addition, the light control film used in the present invention is obtained by curing a resin composition consisting of an oligomer and a monomer or monomers each having a difference in refractive index, and is preferably a photopolymerizable film having a difference in refractive index. It is obtained by irradiating and curing a resin composition consisting of an oligomer and a photopolymerizable monomer or photopolymerizable monomers together with ultraviolet rays, but the angle dependence depends on the irradiation angle of ultraviolet rays,
It is determined by the difference in refractive index of the resin composition.
The thickness of the light control film used in this invention is
It is 20 to 2000 μm. The manufacturing method of this light control film was previously applied for a patent by the present inventors, and patent application filed in 1983.
−302500 (filed on December 18, 1988, “Light control board and its manufacturing method”) and patent application, 1988
The patent application was filed on June 11, 2007, and is described in "Light control board and method for manufacturing the same."

Further, the transparent plastic plate used in the present invention is not particularly limited as long as it is transparent, and any transparent plastic plate can be used. Suitable examples include polycarbonate resin, acrylic resin, methacrylic resin, and polystyrene resin. Moreover, a float glass plate can be used as the glass plate used in the present invention.

Further, in the present invention, the method of attaching the light control film and the transparent plate such as transparent plastic or glass plate is not particularly limited, and any known method can be used. For example, as shown in FIG. 3, the light control film 1 may be applied to the surface of a glass plate or transparent plastic plate 2, and as shown in FIG. Alternatively, as shown in FIG. 5, the light control film 1 may be sandwiched between the glass plates 2 and 2', and a plastic plate 3 may be further bonded to the outer surface of the glass plate. good. Preferably, the outer surface of the plastic board is provided with a scratch-resistant coating.

[Effect of idea]

In the building window of the present invention, if the above-mentioned predetermined angular range is within a range of 20 to 90 degrees upward when measured from the horizontal direction in a direction perpendicular to the window from the inside, It scatters incoming sunlight like ground glass, but when viewed from an angle away from the angle of incidence of sunlight, it has the effect of making the outdoor scenery look exactly like regular window glass. In addition, if the above-mentioned predetermined angle range is within a range of 20° to 90° downward as measured from the inside to the outside of the building horizontally to the window material, the line of sight of others passing outdoors, for example on the road, may be reduced. The effect is that the outdoor scenery that can be obstructed and viewed from other angles looks exactly the same as a normal glass window. In addition, even if the above-mentioned predetermined angle range is other than the above, it is possible to block the line of sight of others located at that angle, and the outdoor scenery at other angles has the effect of looking exactly the same as a normal glass window. .

〔Example〕

Next, an embodiment of the building window of the present invention will be described with reference to the drawings.

100 parts of tribromophenoxyethyl acrylate (refractive index 1.567) per 100 parts of polyether urethane acrylate (refractive index 1.481) obtained by the reaction of polypropylene glycol with an average molecular weight of 2000, toluene diisocyanate and 2-hydroxyethyl acrylate. A resin composition prepared by adding and mixing 6 parts of benzyl dimethyl ketal is applied to a thickness of about 300 microns on a horizontally placed glass plate measuring 60 cm x 80 cm. A rod-shaped high-pressure mercury lamp (80W/cm, 2kW, approximately 2cm in diameter, A glass plate with a light emitting length of 25 cm (manufactured by Ushio Electric) was placed horizontally and approximately parallel to the longitudinal direction of the glass plate, and ultraviolet rays were irradiated for 1 minute to obtain a cured film. This film cured on the glass plate is peeled off from the glass plate. Prepare two glass plates and two polyvinyl butyral membranes (PVB) each measuring 60 cm x 80 cm.
PVB, cured film, PVB, and glass plate are laminated in this order and heated and pressed using a known method to obtain an integrated cured sheet.

The obtained cured sheet was cloudy when viewed from an inclined position within an angle range of 20 to 80 degrees in the one direction from the vertical plane, and was transparent when viewed from other angles. FIG. 6 shows the turbidity measurement results for this cured sheet.

FIG. 1A shows a situation where conventional windows are used, and people in the room use blinds to avoid direct sunlight. Therefore, the outside scenery cannot be seen. Figure 1B shows a situation where the window of the present invention is used, and direct sunlight is scattered like ground glass, so there is no need to use blinds, etc. . Furthermore, you can see the outdoor scenery as it is, except for the angle of the sun. FIG. 2A shows a state in which a light beam having an incident angle other than 20 DEG to 90 DEG on one side is directly transmitted through the light control film used in the present invention. Figure 2 B shows 20 mm on one side of the above film.
Indicates a situation in which light rays with an angle of incidence within ~90° are scattered.

[Brief explanation of the drawing]

FIG. 1 shows the situation in which the building window of the present invention is used, and FIG. 2 shows the state of light transmission of the light control film used in the present invention. Further, FIGS. 3 to 5 show specific examples of cross-sectional views of building windows of the present invention. Furthermore, FIG. 6 shows a specific example of the angle dependence characteristic diagram of the film. Explanation of symbols, a...sun, b...sunray, c
...Conventional window, d...Blind, e...Window of the present invention, f...Scattered light.

Claims (1)

[Claims for Utility Model Registration] (1) Light is applied from a predetermined angle to a film-like resin composition consisting of a photopolymerizable oligomer and a photopolymerizable monomer, or photopolymerizable monomers each having a different refractive index. A light control film obtained by irradiating and curing the film, which selectively scatters and transmits only incident light at an angle within a range centered on the predetermined angle, while incident light at other angles travels straight. A building window in which a light control film that can be seen through is attached to the surface of a transparent plate or a window material is inserted between a plurality of transparent plates. (2) The window material is installed almost vertically, and the predetermined angle range is between 20° and 90°, measured from the inside to the outside of the building and from the horizontal direction of the window material upwards. The building window described in item 1 of the claims for utility model registration within (3) The window material is installed almost vertically, and the predetermined angle range is between 20° and 90°, measured from the inside of the building toward the outside and from the horizontal direction of the window material downward. The building window described in item 1 of the claims for utility model registration within (4) The above-mentioned window material is installed almost vertically, and the above-mentioned predetermined angle range is within a range of 30 degrees from the inside to the outside of the building, measured vertically from the horizontal direction of the above-mentioned window material. A building window according to claim 1 of the utility model registration claim. (5) The window material is installed almost vertically, and the predetermined angle range is 30 degrees each when measured from the inside to the outside of the building and from the direction perpendicular to the window material to at least one of the left and right sides. The building window according to claim 1 of the utility model registration claim, which is within the range of 90° to 90°. (6) The above-mentioned window material is installed almost vertically, and the above-mentioned prescribed angle range is within 30 degrees from the inside to the outside of the building, measured from the direction perpendicular to the above-mentioned window material to the left and right. A building window as described in item 1 of the utility model registration claim within the scope.