JPH02266086A - Blind for window - Google Patents

Abstract

PURPOSE:To keep light shielding property from a room interior and a room exterior, and enable a decoration put between both filters, to be admired from the room interior and the room exterior by arranging two polaroid filters in the polarizing directions orthogonal to each other and with a proper distance between the filters. CONSTITUTION:In the window of a building, a first polaroid filter P1 and a second polaroid filter P2 are arranged in the respective polarizing directions orthogonal to each other and with a proper distance between the filters. Then, light from a room interior and a room exterior is shielded by both the polaroid filters P1, P2, and a vista from both the room interior and exterior is interrupted. In this case, the decoration of a potted plant or the like set between both the filters P1, P2 can be seen through both the room interior and exterior, as the light passes any one side of the polaroid filters P1, P2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a window blind using a polarizing filter.

[Conventional technology]

Conventional window blinds have a large number of thin light-blocking strips lined up horizontally or vertically, and by changing the direction of these strips all at once using strings, etc., the degree of light-blocking can be changed to create a light-blocking state or a light-transmitting state. I am trying to choose between states and between them.

And this kind of blinds are widely popular.

[Problem to be solved by the invention] However, there are also disadvantages due to the presence of light-blocking strips.

For example, when considering a bay window, there are the following problems.

In other words, bay windows also serve as decorative windows, and are often used to store ornamental items such as potted plants.

However, if a blind is placed close to the glass of a bay window, those inside the room can view the blind, while those outside see the outside of the blind. On the other hand, if you install a blind inside the bay window, that is, on the same level as the wall, people inside the room will not be able to enjoy the view.

On the other hand, if a configuration is adopted that pursues ornamental properties, light-shielding properties will be impaired.

Since these are in any case due to the use of light-blocking strips, the problem cannot be solved unless a separate light-blocking element is used.

The present invention has been made in consideration of the above points, and an object of the present invention is to provide a window blind that has sufficient light-blocking properties and can be used more decoratively than conventional blinds.

[Means to solve the problem]

In order to achieve the above object, the present invention provides blinds installed on the windows of buildings, which are arranged with an appropriate gap between them so that one side is on the outside and the other on the inside, and the polarization directions of each are perpendicular to each other. A window blind comprising first and second polarizing filters selected in relation to each other is provided.

[Function] The first and second polarizing filters are selected such that their polarization directions are perpendicular to each other. Therefore, even if light from indoors or outdoors passes through the first filter or the second filter, it cannot pass through the other filter.

This means that even though the outer filter of the first and second filters can be seen through from outside, the inner filter cannot be seen through. Similarly, from indoors, you can see through the inner filter, but you cannot see through the outer filter.

Therefore, even if the filter placed between the first filter and the second filter is visible from both the outside and the inside, the inside cannot be seen from the outside, and the outside cannot be seen from the inside.

〔Effect of the invention〕

As described above, according to the present invention, the first and second dual polarizing filters arranged with a space in between allow the space between the two filters to be seen from both the outside and inside of the room, but the space beyond that cannot be seen. Therefore, it is an object of the present invention to provide a window blind that satisfies the requirements for light-blocking properties and can be used to give the window a decorative effect.

〔Example〕

As is generally known, the characteristic of a polarizing filter is that it transmits either longitudinal or transverse waves of light and blocks the other. Therefore, a light shielding device can be constructed by combining two polarizing filters with different polarization directions. The present invention takes advantage of this characteristic.

Figures 1 (a), (b), and (c) show how the degree of light transmission changes when the polarization direction of one polarizing filter P1 and the other polarizing filter P2 is sequentially changed. be.

In the same figure (a), one polarizing filter P1 transmits transverse waves,
Since the polarization direction is set so that the other polarizing filter P2 transmits longitudinal waves, the transverse wave light incident from the left side in the figure passes through the first polarizing filter P1 but does not pass through the second polarizing filter P2. Not transparent. In FIG. 5B, since the polarizing filter P2 is rotated by about 45-5, a certain amount of light passes through the second polarizing filter P2. And the same figure (e)
Since both the polarization directions of the first and second polarizing filters transmit transverse waves, all incident light passes through the double-sided optical filters Pa, . . . P2.

FIGS. 2(a) and 2(b) explain the problem when the first polarizing filter P] and the second polarizing filter P2 are not parallel to each other. Figure (a) is the first
The surface of the second polarizing filter P2 in figure (a) is at an angle θ
The case where the polarizing filter P1 is tilted relative to the first polarizing filter P1 is shown. In this case, since the polarization directions of both filters cannot be said to be perpendicular to each other, the light also passes through the second polarizing filter.

Figure (b) shows that when the second polarizing filters P2a, P2b, and P2c are arranged on each of the three sides of the bay window, the polarizing filters P2bSP2c on both sides are different from the first polarizing filter P1 as in Figure (a). It shows that they are in a relationship. In other words, a bay window has a structure in which the filter angle makes it difficult to obtain a perfect light-shielding effect.

To solve this problem, use polarizing filters P2b and P2c on both sides.
It is necessary to select the installation angle appropriately. Similarly, when the first and second filters are made to have translucency, the polarizing filters P2b on both sides are used.

It is necessary to appropriately select the installation angle of P2c.

Figure 3 (a) shows the degree of light transmission when the polarization directions of both filters are selected so that the light passes through the first and second filters, and Figure 3 (b) shows the degree of light transmission when the polarization directions of both filters are selected so that the light passes through the first and second filters. The figure shows the degree of light transmission when the polarization directions of both filters are selected so that light passes through one of the two polarizing filters but not the other.

That is, in the same figure (a), the first polarizing filter P1 and the second polarizing filter
The vase placed in the space between the polarizing filter P2 and the background can be seen from both the outside and inside of the room. On the other hand, in FIG. 6B, the background is not visible and only the vase is visible. Therefore, if the configuration is configured to select between the state shown in FIG. 5(a) and the state shown in FIG. I can make it visible.

FIGS. 4(a) and 4(b) show that the transparent state and the light-shielding state can be freely changed, and for this purpose, the first polarizing filter P1 is adjusted to a pH of 1.2. It is divided into two parts and has a sliding door structure. Additionally, in order to prevent light transmission due to light scattering in the space between the first polarizing filter and the second polarizing filter, a light shielding body S is provided in the center of the space.

The second polarizing filter P2a is divided into two, P21 and P22, and P21 and P2b and P22 and P2c are in different polarization directions.

That is, the polarization directions of the first polarizing filter pH and PI3 differ by 90 degrees, and the polarization directions of the first polarizing filter pH and PI3 differ by 90 degrees, and
P2b and P22 and P2c also have polarization directions different from each other by 90°. This allows the first
By appropriately combining the polarizing filter and the second polarizing filter, it is possible to switch between light transmittance and light opacity.

Further, the light shielding body S can prevent oblique light from entering as shown by arrow A in the figure. Similarly, it is also possible to prevent indoor light from leaking outside.

FIG. 5 shows an embodiment for a normal window. That is, one of the first filter pH, PI3 and the second filter P2] and P22 is configured to have transverse wave permeability and the other to have longitudinal wave permeability, as in FIG. The distance between the filters is chosen to be small.

FIGS. 6(a), (b), and (c) show a sliding door structure that is a shift type of the sliding door structure shown in FIGS. 4 and 5. In other words, in the example of FIG. 2(a), the first filter P
The first and second filters P2 both have a structure in which a large number of strips on strips are vertically arranged, and every other strip is for transmitting longitudinal waves and for transmitting transverse waves.

Therefore, by shifting the first filter by one strip with respect to the second filter, it is possible to easily switch between translucent and non-transparent properties. In order to prevent light leakage between the strips, a thin light shield S is provided between the strips. In the figure (e), the strips are arranged horizontally compared to the vertical direction in the figure (a).

In these embodiments, by increasing the number of strips on the movable side by one compared to those on the fixed side, even if the movable side is shifted, it can always be made to correspond to the fixed side 2.

FIG. 7 shows that the first polarizing filter in each of the above embodiments is formed in late autumn to obtain an effect similar to that of a curtain. In this embodiment, the first polarizing filter P1 is constructed using a flexible sheet. Since it is a flexible sheet, there is a tendency that a sufficient parallel relationship with the second polarizing filter cannot necessarily be obtained, but convenience in use is prioritized.

FIGS. 8(a) and 8(b) show a specific example of the construction of the autumn autumn body shown in FIG. 7, which is constructed as a lace curtain. In other words, the same figure (a) shows the vinyl sheet 1.1.
In this case, the lace 12 is on the indoor side and the lace 12 is on the outdoor side, and the lace 12 is on the indoor side while the lace 12 is on the indoor side.

FIGS. 9(a) and 9(b) are views showing an embodiment corresponding to FIG. 8(a) as viewed from the indoor side. By adopting such a configuration, it can be used in the same way as a conventional bay window, and the visual impression can be made to be particularly natural.

Figures 8(a) and 8(b) showing the structure of the curtain.
) and FIGS. 9(a) and 9(b) are diagrams showing a specific configuration of the embodiment of FIG. 7.

Pl, , pH, , Pl, 2...first polarizing filter, P
2. P21. , P22... second polarizing filter, S...
- Light shielding body, 11... Vinyl sea 1-112... Lace.

[Brief explanation of drawings]

Claims (1)

[Claims] 1. Blinds installed on the windows of buildings, one of which is placed on the outside and the other on the inside with an appropriate gap in between, and each polarization direction is perpendicular to each other. A window blind comprising selected first and second polarizing filters. 2. The window blind according to claim 1, further comprising a shield that divides a space formed between the first and second filters. 3. The window blind according to claim 1, wherein the inner one of the first and second polarizing filters has a sliding structure.