JPH0571275A - Dimmer window for av conference room - Google Patents

Abstract

PURPOSE:To make it possible to block light sufficiently while keeping an electrochromic window in smart by combining colored glasses of clear colored plastic plates with the electrochromic window, and making light permeability as a specific value in the case of shading. CONSTITUTION:A solid electrolytic membrane 14 impregnated with electrolytic solution prepared by dissolving trifluoromethane sulfonic acid lithium as electrolyte in polyethylene glycol mono-ether into a polyethylene microporous membrane is sandwiched between a membrane made of a transparent conductive membrane 16 such as ITO, SnO2, etc., and an electrode I 15 such as WO3 on a sheet glass 17 and a membrane made of a transparent conductive membrane 12 and an electrode II 13 such as of ITO, SnO2, etc., on a sheet glass 11. When one of the sheet glasses 11 and 17 is selected as a blue colored glass, for example, light permeability of the whole dimmer window in the case of coloring of electrochromic elements reaches less than 15%, and practical shading is realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light control window for an AV conference room.

[0002]

2. Description of the Related Art Conventionally, when using an overhead projector (OHP) or a slide in a conference room to darken the room, a curtain is closed or a room without a window is conventionally available. There are electric curtains. Further, a dimming window using liquid crystal and an electrochromic window are also considered as candidates.

[0003]

However, there is no feeling of openness in a room without windows. It ’s a hassle with curtains,
Not smart. Moreover, since the dimming window and the electrochromic window using liquid crystal cannot completely shield light, they are not necessarily suitable for an AV conference room by themselves. Therefore, an object of the present invention is to provide a practical dimming window capable of sufficiently shielding light while making the most of the electrochromic window.

[0004]

In order to achieve the above-mentioned object, the present invention combines an electrochromic window with a colored glass or a transparent colored plastic plate, and has a light transmittance of 15% or less when shielded from light, preferably Provided is a light control window for an AV conference room, which can be set to 10% or less. The light transmittance of the electrochromic window alone can be reduced to about 20% or less. However, if the light transmittance of colored glass or translucent colored plastic plate is set to about 60%, the light transmittance obtained by combining these will be It will be less than 10%. When the light transmittance is 15% or less, more preferably 10% or less, it can be sufficiently put into practical use for an AV conference room. If desired, the light transmittance of the colored glass or translucent colored plastic plate may be further reduced, and the light transmittance of the electrochromic window alone may be further improved.

A typical structure of an electrochromic window is a transparent conductive film such as ITO or SnO ₂ and an E such as WO ₃ on glass.
An electrolyte solution, such as propylene carbonate and dimethytoxyethane, was added between the film formed with the C electrode (I) and the film formed with a transparent conductive film such as ITO or SnO ₂ and the EC electrode (II) on glass. It is one in which a salt is dissolved, or a gel-like polymer electrolyte or a solid electrolyte is sandwiched. Also, a transparent plastic plate may be used instead of glass. In the present invention, a colored glass or a transparent colored plastic plate may be separately attached to such an electrochromic window, but in reality, one or both of the glass of the electrochromic window and the transparent plastic plate are colored. Make it glass.

The constitution of the electrochromic window of the present invention may be any known one except that it is combined with a colored glass, and the typical constitution is as described above. In particular, a porous polymer thin film is filled with a liquid electrolyte. The solid electrolyte thin film has no fear of liquid electrolyte leakage, high conductivity like liquid electrolyte, high efficiency, thin film thickness,
It has advantages such as flexibility and easy attachment to glass, and is most suitable for application to the light control window of the present invention.

In the above case, the microporous polymer membrane used as the solid electrolyte membrane has an average molecular weight of 500,000 or more, an average pore diameter of 0.001 to 0.1 μm, a porosity of 40 to 90% and a thick film of 0.1 to 1.
A 50 μm polyolefin film, especially a polyethylene film is effective. For example, a complex of low molecular weight polyethylene glycol and an alkali metal salt such as lithium trifluoromethanesulfonate or a solution such as propylene carbonate may be added to the pores. By filling and immobilizing the obtained electrolyte solution, it can be effectively used for the electrochromic device constituting the present invention as a substantially solid electrolyte membrane showing high ionic conductivity and mechanical strength.

[0008]

[Function] By combining the colored glass or translucent colored plastic plate with the electrochromic window, the light transmittance and the light transmittance at the time of light shielding should be 10% or less by taking advantage of the simplicity and smartness of the electrochromic window. Can be done, A
Practical use for V conference room.

[0009]

FIG. 1 shows an example of the structure of a light control window for an AV conference room according to the present invention. In the figure, the glass plate 11, the transparent conductive film 12, the electrode II 13, the solid electrolyte membrane 14, the electrode I 15, the transparent conductive film 16, and the glass plate 17 are laminated in this order from the indoor side. The glass plate 11 may be a transparent resin plate. The transparent conductive films 12 and 14 are collector electrodes, and are formed of indium tin oxide (ITO), tin oxide, or the like.

As the solid electrolyte membrane 14, for example, the following
The one prepared as described above is used. For example, polyethylene
Electrolyze into polyethylene glycol monoether in the pore membrane
Dissolves lithium trifluoromethanesulfonate as a quality
Impregnated with the dissolved electrolyte solution, the thickness is 4 μm,
Ionic conductivity is 2 × 10^-FourIt has the characteristic of S / cm. Electrode I
15 is a cathodic material for reduction coloring and an oxidative coloring material.
There are two types of Nordic materials, but here is a typical return
Original material WO₃To use. WO₃Is H from the electrolyte
⁺(Li⁺) And when electrons from the power supply are injected WO₃(Transparent
Ming) + H⁺＋ xe and H_XWO₃Reversible reaction with (blue)
U This reaction is reversible, but H_XWO ₃Power in the state of
When the circuit is opened, the blue color (reduction state) is retained for a long time.
It

The electrode II13 is an oxidation coloring type electrode material, for example,
When IrO _X or the like is used, the coloring efficiency becomes high. Also electrodes
It may use different WO ₃ crystal state to II13. This electrochromic device is provided between the electrode I15 and the electrode II13.
It is driven by applying a voltage of about 1.1 to 1.6 V and works as a light control glass that is variable between blue and colorless and transparent.

In addition to the above example, the structure of the electrochromic device is changed to, for example, a cathodic material containing WO ₃ ,
By designing a colored pattern using polyaniline, viologen, Prussian blue, etc. as an anodic material, a tunable optical glass that better matches the wall design can be obtained. This allows the electrochromic device to be positively utilized as a design, not as a blinder.

In such a light control window, the glass plate 11,
When 17 is transparent, the light transmittance during coloring is about 18%.
Therefore, by making the glass plate 11 a blue glass having a light transmittance of about 60%, the light transmittance of the entire light control window during coloring of the electrochromic element is reduced to 10%, and practical light shielding is realized. It

[0014]

According to the present invention, there is provided a smart dimming window for an AV conference room using an electrochromic window and having a sufficient shading effect.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a configuration example of a light control window for an AV conference room according to the present invention.

[Explanation of symbols]

 11 ... Glass plate 12 ... Transparent conductive film 13 ... Electrode II 14 ... Solid electrolyte membrane 15 ... Electrode I 16 ... Transparent electrode 17 ... Glass plate

Claims (1)

[Claims] 1. A light control window for an AV conference room, characterized in that an electrochromic window is combined with a colored glass or a transparent colored plastic plate so that the light transmittance can be 15% or less when light is shielded.