JPS6081044A - Glass plate - Google Patents

Abstract

PURPOSE:To obtain a glass plate through which an object can be seen from only a prescribed direction at a desired time by cutting plural slits in a plate of a transparent material and forming a shielding part which changes the light transmittance in each of the slits. CONSTITUTION:Plural slits 3 are cut parallel to each other in a plate 2 of a transparent material in a prescribed direction from the surface. A shielding part of a liq. crystal layer 4 which changes the light transmittance at a desired time to shield light is sealed in each of the slits 3, and a protective layer 5 such as a transparent plastic film is formed on the slit surface. When a switch is operated at a desired time, the layers 4 are made opaque, so an object can be seen through the plate 2 except the widths of the slits 3 from a direction A, and it can not be seen through the plate 2 from an other direction B because the layers 4 shield light. An electrochromic material, a photochromic material or the like may be used in place of the liq. crystal for the shielding parts. The resulting glass plate 1 is used as window glass for an automobile, a building or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a glass plate that can be used for automobile windows, building windows, etc., and that allows a desired object to be seen through from a predetermined direction but not from other directions.

Conventionally, the rear window of a car, for example, was usually made of a completely transparent glass plate, and in order to prevent sunlight from directly entering the interior of the car, the window glass itself was made to have a smoked look, or The problem was dealt with by installing separate curtains and stepped blinds inside and outside the car. However, if you make the window glass itself smokey or install separate curtains, the amount of sunlight entering the car will certainly be reduced, but it will also have the disadvantage of making it slightly difficult to see outside the car from inside the car. In the case where the glass surface is provided with a glass surface, it becomes a hindrance when cleaning the glass surface, which takes time and effort, and the glass surface is always blocked in directions other than the predetermined direction, reducing visibility in directions other than the predetermined direction.

In view of the above points, the present invention does not provide a separate shielding device that would get in the way during cleaning, etc., but a shielding part that cannot be seen through when desired is formed on the glass plate itself, and the line of sight from inside the car, e.g. The line of sight in the direction viewed directly from the side can be transmitted to the outside of the vehicle, but the light rays or line of sight from outside the vehicle, for example from above, cannot be transmitted through, and it can be seen through from a predetermined direction only when desired, but cannot be seen from other directions. The purpose is to provide a glass plate that can

The gist of this invention is that a plurality of slits are formed in a plate made of a transparent material in a predetermined direction from the surface of the plate, and a shielding part is formed in the slit to make it impossible to see through when desired, so that the desired samurai can be seen through only from a predetermined direction. It consists of a glass plate. The shielding portion is made of a material whose light transmittance can be changed, such as a liquid crystal material, an electrochromic material, a photochromic material, or the like.

Hereinafter, embodiments of the present invention will be described based on illustrated examples.

FIG. 1 is a perspective view showing a glass plate according to a first embodiment of the present invention, FIG. 2 is an enlarged partial longitudinal sectional view of the same embodiment, and FIG. 3 is an enlarged partial sectional view showing a shielding part of the same embodiment. Fig. 4 is a wiring diagram showing the connection of the shielding part of the same embodiment, Fig. 5 is a perspective view showing the glass plate of the second embodiment, Fig. 6 is an enlarged longitudinal sectional view of the same embodiment, and Fig. 7. 8 is an enlarged partial sectional view showing the shielding part of the same embodiment, FIG. 8 is a wiring diagram showing the connection of the shielding part of the same embodiment, and FIG.
The figure is an enlarged partial sectional view showing the shielding part of the third embodiment.

The glass plate l of the first embodiment is formed from a plate material 2 made of a synthetic resin material such as transparent acrylic or polycarbonate, or a transparent material such as inorganic glass. A plurality of slits 3 are formed in parallel. The slits 3 are formed by using an industrial grinder, by cutting and polishing using a milling machine, or by polishing after using a laser beam.

Inside the slit 3, a liquid crystal layer 4 made of a liquid crystal material is provided as a shielding part that changes the light transmittance and makes it impossible to see through when desired.
is enclosed, and a protective layer 5 made of a transparent synthetic resin film or the like is formed on the surface on the opening side of the slit 3 in consideration of smoothness and scratch resistance.

This liquid crystal layer 4 becomes cloudy and opaque when a voltage is applied to it between two transparent conductive films 4b-4b which serve as electrodes between two polarizing plates 4C and 4C, respectively. A liquid crystal material 4a such as a nematic liquid crystal that remains transparent when no voltage is applied is sealed and formed, and one transparent conductive film 4 which is an electrode of the liquid crystal layer 4
b is connected to a battery 7 via a switch 6 provided separately from the glass plate l (see Figures 3 and 4).

Therefore, this glass plate 1 can be used when the switch 6 is turned on when desired.
If you operate N, the liquid crystal layer 4, which is the shielding part, becomes opaque.
From the direction A shown in FIG. 2, it is possible to see through except for the width of the slit 3, and from the other direction B, it is blocked by the liquid crystal layer 4 and cannot be seen. Since the liquid crystal layer 4, which is the main part, is in a transparent state, it can be seen through even from the B direction.

The glass plate 11 of the second embodiment is used for the rear window of an automobile, and is made by bending a flat plate made of a transparent material similar to that of the first embodiment into a predetermined shape by vacuum forming or press forming. A plate material 12 is formed, and this plate material 12
The glass plate 11 is cut and polished using an industrial grinder, a milling machine, a laser beam, etc. in a predetermined direction parallel to the ground when the glass plate 11 is mounted on an automobile.

An electrochromic body layer 14 made of an electrochromic material is sealed in this sleeve 13 as a shielding part that changes the light transmittance when desired and makes it impossible to see through, and the surface of the sleeve 13 on the opening side is transparent. The protective layer 15 is formed of a synthetic resin film or the like.

This electrochromic body layer 14 is formed by laminating an electrolytic solution layer 14c and an electrochromic material 14a between two transparent conductive films 14b, which serve as electrodes, and colors when a voltage is applied. , it remains uncolored when no voltage is applied. The electrolytic solution @l4C uses lN-H2SO4, etc., and the electrochromic material 14a uses tungsten oxide, molybdenum trioxide, a mixture thereof, or a cermet of gold and tungsten trioxide, etc.
Lamination is performed using a vacuum kiln deposition method, sputtering method, etc. during formation. Further, the transparent conductive films 14b-14b, which are electrodes, are connected to a battery 17 via a switch 16 installed near the driver's seat (see Figure 7, Figure 8).

Therefore, this glass plate 11 can be used as a switch 16 when desired.
When turned on, the electrochromic body N14, which is the shielding part, is colored and its transmittance is reduced, so that it becomes visible from the direction A shown in FIG. 6 except for the width of the slit 130, and from the other direction B. It is shielded by the electrochromic body layer 14 and cannot be seen through, and the switch 16 is turned on.
When the FF is operated, the electrochromic body layer 14, which is a shielding part, is decolored and the light transmittance is increased, so that it becomes visible even from the B direction. The glass plate 21 of the third embodiment shown in FIG. 9 has a plate material 22 similar to that of the second embodiment with a width of 0.5 to 2.
A slit 23 of about 0 as is formed, and a photochromic layer 24 made of a photochromic material is formed in the slit 23 as a shielding part that changes the light transmittance when desired and makes it impossible to see through, and on the surface of the glass plate 21, In order to improve smoothness and scratch resistance, a transparent coating liquid such as acrylic or silicone is applied to form the protective layer 25 .

This photochromic layer 24 is characterized by being colored when irradiated with sunlight and returning to its original state when the irradiation is removed, and is a photochromic material.

A mixture of an epoxy adhesive, an acrylic adhesive, an acrylic monomer cast material, and a potting material is poured into the slit 23 and hardened to form the adhesive.

The photochromic material is colorless or light-colored when collecting oil, and examples include one or a mixture of two or more of the following.

1.3.3-)rifthyl-9'-methoxyspiroindolinenaphthoxime, 1,3.3-)rifthyl-8'
- Promospirotrinchifthoxime, 1,3,
3.6-tetramethyl-9'-methoxyspiroindolinenaphthoxime, 1,3,3,4.5-pentamethyl-9'-methoxy-spiroindolinenaphthoxime, 1°3.3,4.7-bentamethyl- 9'-Methoxysuheroindolinenaphthoxime, 1,3.3-'
l-dimethyl-5,9'-dimethoxyspiroindoline naphthoxime, 1,3,3,4,5-pentamethyl-8'-bromospiroindoline naphthoxime.

Therefore, when the glass plate 21 of the third embodiment is irradiated with sunlight, the photochromic layer 24, which is a shielding part, is colored and reduces the light transmittance, so that it can be seen through from the A direction except for the width of the slit 23. Therefore, from the other direction B, it is blocked by the photochromic layer 24 and cannot be seen through.
In addition, when the sun's irradiation ceases, Pheo I, Chromic & F24 increases the light transmittance to return to its original value, making it possible to see through it even from the B direction.

In addition, as the shielding part of the third embodiment, instead of the photochromic layer 24 formed in the slit 23, cholesteric liquid crystal, generally called chameleon liquid crystal, which is colored depending on the temperature, is sealed, and the light transmittance is reduced at a predetermined temperature. You may.

Moreover, in the glass plates of the first to third embodiments, the slit 3
・As a method for forming 13-23, methods using industrial grinders, milling machines, laser beams, etc. were mentioned, but
When forming the glass plate materials 2, 12, and 22 from a transparent material, they may be formed by molding at the same time, and the direction in which the slits are formed is set on the surface of the glass plate material 32, as shown in FIG. A slit 33 may be formed in a desired direction from the substrate, and a substance capable of changing the light transmittance may be sealed in the slit 33. Furthermore, the slit may be formed by penetrating the plate material.

As described above, in this invention, a plurality of slits are formed in a board made of a transparent material in a predetermined direction from the surface of the board, and a shielding part is formed in the slit to change the light transmittance when desired and make it impossible to see through. Therefore, the desired samurai can be seen through from a certain direction but not from other directions, and can be applied to building windows and display panels. For example, if used on the rear window of a car, it can be used as a switch. It is possible to block sunlight by controlling the operation or the amount of sunlight irradiation/temperature, etc. to prevent temperature rise inside the car and glare while driving.On the other hand, the shielding part can be seen through except when desired, so it can be used when driving at night. This has the effect of allowing you to drive safely.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a glass plate according to a first embodiment of the present invention, FIG. 2 is an enlarged partial longitudinal sectional view of the same embodiment, and FIG. 3 is an enlarged partial sectional view showing a shielding part of the same embodiment. Figure 4 shows i! of the same embodiment. 5 is a perspective view showing the glass plate of the second embodiment, FIG. 6 is an enlarged vertical sectional view of the same embodiment, and FIG. 7 is a diagram showing the shielding section of the second embodiment. FIG. 8 is an enlarged partial sectional view showing the connection of the shielding part of the third embodiment, FIG. 9 is an enlarged partial sectional view showing the shielding part of the third embodiment, and FIG.
FIG. 0 is a partial side view of a glass plate showing another example of the direction in which slits are formed. l・11・21・・・Glass plate, 2・12・22・32
...Plate material, 3-13-23.33...Slit, 4
... (shielding section) liquid crystal layer, 14... (shielding section) electrochromic layer, 24... (shielding section) photochromic layer. Patent application Toyoda Gosei Co., Ltd. Figure 3 Figure 4 Figure 8 Figure 10 Figure 9

Claims (1)

[Claims] 1. A plurality of slits are formed in a plate made of a transparent material in a predetermined direction from the surface of the plate, and a shielding part is formed in the slit to change the light transmittance when desired and make it impossible to see through. Desired Samurai A crow plate that can only be viewed from a specified direction. 2. Claim in which the shielding part is made of a liquid crystal material Glass plate 3 according to claim 1, Claim in which the shielding part is made of an electrochromic material The glass plate according to item 1. 4. The glass plate according to claim 1, wherein the shielding portion is made of a photochromic material.