JPS60229013A - Light transmission plate with blind function - Google Patents

Abstract

PURPOSE:To obtain the light transmission plate of simple structure having the blind function which is usable for normal window glass by charging a liquid crystal material between an upper and a lower electrode substrate where a transparent electrode is formed and thus forming a liquid crystal cell, and putting the transparent electrodes opposite to each other so as to form plural overlap parts. CONSTITUTION:When the light transmission plate A receives a driving signal from a drive control circuit 11, a voltage is applied to the overlap part of upper and lower transparent electrodes 61 and 71 specified by an X-axial selecting circuit 111 and a Y-axial selecting circuit 112. Then, the liquid crystal material present at the overlap part 9 changes in orientation mode, so light transmitted through the liquid crystal material applied with the voltage as to light incident on the transparent plate A from the upper polarizing plate 4 is rotated optically by 90 deg. and cut off by the lower polarizing plate 5. Consequently, the overlap part 9 which cuts off the light appears as a dark pattern in the light transmission plate A and four control patterns are determined in advance to change the light transmission plate A according to the degree of the sunshine, controlling the quantity of light transmission of the light transmission plate A.

Description

DETAILED DESCRIPTION OF THE INVENTION An object of the present invention is to provide a light-transmitting plate having a blind function and having a structure that is not known in the technical field.

Conventional technology Normal window glass itself does not have a light blocking function, so on days when the sun is strong, it is customary to lower the blinds attached to the inside of the window glass to block light. .

However, such blinds are often expensive despite the fact that they are only used for a short time each day, require a lot of effort to clean, and when dirt gets stained, they impair their external appearance.

SUMMARY OF THE INVENTION OBJECT OF THE INVENTION Therefore, the present invention aims to solve the disadvantages of ridges.
To provide a transparent plate with a simple structure that can be used for ordinary window glass and has a blind function itself.

Structure of the Invention The light-transmitting plate of the present invention includes a liquid crystal cell sandwiched between upper and lower light-transmitting layers by a pair of polarizing plates. In particular, the liquid crystal cell includes upper and lower electrode substrates on which transparent electrodes are formed. The transparent electrodes formed on each of the upper and lower electrode substrates are arranged to face each other so as to form a plurality of overlapping parts. It is something.

Functions and Effects of the Invention The light-transmitting plate of the present invention is constructed by inserting a liquid crystal cell sandwiched between upper and lower light-transmitting layers by a pair of polarizing plates, so it can be used as is as a regular window glass, etc. .

In addition, the liquid crystal cell inserted into the transparent plate is formed by sealing a liquid crystal material between the upper and lower electrode substrates on which transparent electrodes are formed, with a spacer interposed between them. Since the transparent electrodes are arranged to face each other so as to form a plurality of overlapping parts, one combination of the alignment form of the liquid crystal material and the polarizing plate is appropriately selected, and a voltage is selectively applied between the upper and lower transparent electrodes. As a result, the orientation of the liquid crystal molecules existing in the polymerization part where voltage is applied changes or the liquid crystal molecules become cloudy, so the light entering the transparent plate is transmitted through the other polarizing plate. or can be blocked.

Therefore, by increasing or decreasing the number of overlapping parts between the upper and lower transparent electrodes to which a voltage is applied, the amount of light transmitted through the transparent plate can be arbitrarily controlled, so the plate itself can be used as an auto blind. There are effects that can be used.

Disclosure of embodiments of the invention Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an exploded perspective view showing a first embodiment of the transparent plate, and FIG. 2 is an exploded view showing the structure of a liquid crystal cell.

In the first embodiment, the light-transmitting layer 1.2 is formed of a flat transparent glass 1.2, with upper and lower transparent glasses 1,
A liquid crystal cell 5 sandwiched between a pair of polarizing plates 3 and 14 is pressed onto the inner surface of the liquid crystal cell 2 .

As shown in FIG. 2, each of the upper and lower electrode substrates 6 and 7 constituting the liquid crystal cell 5 is made of undercoated float glass, and each inner surface is coated with a NESA film, A plurality of strip-shaped transparent electrodes 61 and 71 formed of ITO film or the like are deposited in a row, and the transparent electrode 61 formed on the upper electrode substrate 6 and the transparent electrode formed on the lower electrode substrate 7 71 is the X-axis with a predetermined gap between them so that a plurality of overlapping parts 9 are formed.

They are arranged facing each other in the Y-axis direction.

Such liquid crystal cells 5 are arranged facing each other with a gap of several meters to 10/Ltm by spacers 8 made of polyester, glass, epoxy resin, etc.
After sealing the periphery of the lower electrode substrate 6.7 and assembling the empty cell container, liquid crystal material (not shown) is poured into the injection hole 81 previously formed in a part of the spacer 8. is injected, and finally the injection hole 81 is sealed and formed.

A pair of polarizing plates 3 and 4 provided on the upper and lower surfaces of the liquid crystal cell 5
have their respective polarization axes different from each other by 90 degrees, and both allow only the light that vibrates strongly in the direction of the pair of orthogonal polarizers to pass through, while other components can be absorbed.

FIG. 3 shows a control system for the amount of light transmitted by the transparent plate 1-A.

In the figure, 10 is a microcomputer unit;
1 is a control drive circuit, 12 is a light sensor that detects sunlight, and the microcomputer unit 10 is a CPU
The basic configuration is 01 plus a memory 102 and an interface 103.

In this embodiment, the signal output from the optical sensor 12 is
The A/D converter 13 converts the signal into a digital signal according to the sunlight intensity and sends it to the microcomputer.

It is sent to stem 10. When the microcomputer system IO receives the output signal from the A/D converter 13, it selects an appropriate pattern from among four predetermined control patterns for controlling the amount of transmitted light, and controls the control drive circuit 11. send a control signal to.

Here, the control drive circuit 11 should apply a voltage from within the transparent electrode 61 formed on the upper electrode substrate 6! ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,I,I,,,,,,,,,,,,,,,,‐,I,,,,,,,,,,, I I'm going to have a good time.
It is equipped with a Y-axis selection circuit 112 for specifying which of the transparent electrodes 71 formed in the transparent electrodes 71 to which a voltage should be applied is provided, and control signals from the microcomputer unit 10 are inputted to these selection circuits 111 and 112 separately. .

When the transparent plate A receives a drive signal from the drive control circuit 11, the light transmitting plate A receives the drive signal specified by the X-axis selection circuit 111 and the Y-axis selection circuit 112.

A voltage is applied to the overlapping portion 9 of the lower transparent electrode 61.71,
As a result of the change in the orientation of the molecules of the liquid crystal material present in the polymerization part 9, some of the light incident on the transparent plate A from the upper polarizing plate 4 passes through the liquid crystal material to which a voltage is applied. The light will be rotated by 90 degrees and will be blocked from transmitting through the lower polarizing plate 5. Therefore, the overlapping part 9 that blocks this light is a transparent plate as shown in FIG. It appears as a dark pattern inside A.

Therefore, if four control patterns are determined in advance,
The light-transmitting plate A is changed from the state of (a)- in FIG. 4 to the state of (d) in the same figure according to the sunlight intensity.
The amount of light transmitted can be controlled.

Here, FIG. 4 shows the control form of the light-transmitting plate controlled by four control patterns, and (a) shows a voltage applied to all of the overlapping parts 9 of the upper and lower transparent electrodes 61 and 71. state (here, referred to as “total light shielding” state), (b
) is a state (
(Here, it is referred to as a "150% light transmission" state), (C) is a state in which the number of polymerized parts 9 to which a voltage is applied is approximately 30% of the total (herein, referred to as a "30% light transmission" state), (d ) is a state in which the number of overlapping parts 9 to which a voltage is applied is set to 0 (herein referred to as a "total light-transmitting" state).

Although FIG. 5 shows a flowchart executed in this case, it goes without saying that the amount of light transmitted through the light-transmitting plate A may be controlled manually.

FIG. 6 shows another embodiment of the liquid crystal cell 5 constituting the transparent plate A of the present invention, in which a plurality of transparent electrodes formed on the upper electrode substrate 6' are arranged with insulating spacers 63 interposed between them. The transparent electrode of the other lower electrode substrate 7' is formed into a single flat common electrode 72.

In this embodiment, it is possible to select any of the electrode segments 62 and apply a voltage independently, so that if the selection is made arbitrarily, the upper and lower transparent electrodes in the transparent plate A The liquid crystal material present in the overlapping part of the electrode segment 62 and the common electrode 72 appears as a dark pattern, and an arbitrary dark pattern can be obtained. has the advantage of being controllable.

In the above embodiment, the transparent plate A of the present invention forms an orthogonal polarizer with a pair of polarizing plates 3.4 sandwiching the liquid crystal cell 5, and when a voltage is applied between the upper and lower transparent electrodes 61, 71, Although the liquid crystal material existing in the overlapping portion 9 of both electrodes 61 and 71 appears as a dark pattern has been described, the light-transmitting plate A of the present invention is not limited to such a thing, and the liquid crystal material By variously changing the orientation form of the liquid crystal and the combination of the pair of polarizing plates, it is possible to create an embodiment in which the liquid crystal material present in the overlapping part of the upper and lower transparent electrodes exhibits a dark pattern when no voltage is applied, and becomes transparent when a voltage is applied. Alternatively, the liquid crystal material present in the polymerization portion may be configured to change from a transparent pattern to a cloudy pattern when a voltage is applied.

In addition, the control pattern for the amount of light transmitted by the transparent plate is as follows:
By scanningly applying a voltage to the overlapping portions of the upper and lower transparent electrodes, a structure may be constructed in which a dark pattern or a cloudy pattern can be movably changed and displayed. It has a great effect and can satisfy the taste of the viewer.

Furthermore, since the light-transmitting plate of the present invention is a composite plate in which upper and lower light-transmitting layers, a pair of polarizing plates, and a liquid crystal cell are laminated, the light-transmitting plate is a composite plate in which the light-transmitting layer is made of transparent glass and the polarizing plate is made of PVA. When made of resin, it can also be used as a type of laminated glass with heat insulating properties.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of the transparent plate of the present invention, Fig. 2 is an exploded view of the liquid crystal cell, Fig. 3 is a block diagram schematically showing the control system for the amount of light transmitted, and Fig. 4 is the main part of the present invention. FIG.
FIG. 6 is an exploded view of the other side of the liquid crystal cell of the transparent plate of the present invention. (Explanation of symbols) A is a transparent plate of the present invention, 1 and 2 are upper and lower transparent layers,
3.4 is a pair of orthogonal polarizing plates, 5 is a liquid crystal cell, 6.6',
The upper electrode substrate, 7.7' is the lower electrode substrate, 61.62 is the upper transparent electrode, 71.72 is the lower transparent electrode, and 9 indicates the overlapping part thereof. 1st! ! ! Figure 2 1 Figure 3 1 Dairy f-~-A Figure 5

Claims (1)

[Scope of Claims] A light-transmitting plate comprising a liquid crystal cell sandwiched between upper and lower light-transmitting layers by a pair of polarizing plates, the liquid crystal cell comprising upper and lower electrode substrates on which transparent electrodes are formed. The transparent electrodes formed on each of the electrode substrates are arranged to face each other so as to form a plurality of overlapping parts. Translucent plate with blind function.