JPH0574211A - Light dimming floor illumination - Google Patents

Abstract

PURPOSE:To increase a degree of freedom is a comfortable space created by floor illumination by incorporating an electrochromic element into the floor illumination so as to enable light dimming. CONSTITUTION:Illumination light from a light source 10 enters a room by passing through a floor plate (electrochromic element). In the case of constituting the floor plate as the electrochromic element, a transparent electrically conductive film 12 such as ITO or SnO2 and an EC electrode I13 (such as WO3) are formed, for example, on a glass plate 11. A transparent electrically conductive film 16 such as ITO or SnO2 and an EC electrode II15 (such as NiOx, IrOx, Prussian blue or viologen) are formed further on the plate 11, and a plate formed in such a way that nonaqueous solvent (such as electrolytic solution of carbonic acid propylene and so on) obtained by dissolving lithium salt is sandwiched between both the films, is used as the floor plate. Particularly, as for a solid electrolytic film 14 formed by filling liquid electrolyte in a micro porous polymer thin film, a fear of the solid electrolyte leakage is hardly caused, so that electric conductivity or efficiency and so on can be improved. Thereby, light dimming of floor illumination becomes possible, and a degree of freedom in a comfortable space thereby created can be also increased.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to dimmable floor lighting.

[0002]

2. Description of the Related Art In Japan, direct lighting is the mainstream of lighting, but it is said that indirect lighting will increase from now on. In addition, it is important to create a comfortable space that is different from usual, such as in the hotel lobby, theater entrance, and dance halls.
Ingenuity of lighting is indispensable. Under these circumstances, floor lighting
Considered at the cutting edge.

[0003]

Floor lighting has the effect of giving a different feeling to humans because light comes from below, but if the amount of lighting and the color can be changed, it is more creative. It will be possible to create a unique space. In addition, floor lighting can be uncomfortable for some people if the stimulus is too intense or if an abnormal sensation continues for a long time. Is desired.

Therefore, an object of the present invention is to make dimming of floor lighting possible.

[0005]

The present invention has the following objects.
This is achieved by providing a dimming floor lighting characterized by incorporating an electrochromic element into the floor lighting to enable dimming. The electrochromic device is suitable for floor applications because it can be made large in area, has a low operating voltage, is safe, and has low power consumption. Furthermore, the electrochromic device is suitable for floor lighting because the amount of injected charges can be finely changed in terms of adjusting the amount of light and coloring.

[0006]

EXAMPLES As a mode of incorporating an electrochromic element in floor lighting, a glass or plastic plate to be an illumination floor board is configured as an electrochromic element,
In a place where a large load or impact is applied, or where wear is severe, the reinforced lighting floor plate may be configured separately from the electrochromic device.

FIG. 1 shows an example in which the floor plate is constructed as an electrochromic device. Illumination light from the light source 10 passes through the floor plate (electrochromic element) and enters the room.
The method for configuring the floor plate as an electrochromic element can be a known method, for example, ITO on glass,
A transparent conductive film such as SnO ₂ and an EC electrode (I) (WO ₃ etc.) formed, and a transparent conductive film such as ITO and SnO ₂ and an EC electrode (II) (NiO _x , IrO _x , Prussian blue,
It is possible to use a non-aqueous solvent (electrolyte solution such as propylene carbonate or a polymer gel electrolyte sandwiched by dissolving a lithium salt between film-formed materials such as viologen), but especially a microporous polymer. The solid electrolyte thin film in which the thin film is filled with the liquid electrolyte has no fear of liquid electrolyte leaking, has the same high conductivity and high efficiency as the liquid electrolyte, has a thin film, and has flexibility and glass. It has advantages such as easy attachment, and is most suitable for application to the window glass 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 solvent such as propylene carbonate may be added to the pores. By filling and solidifying the obtained electrolyte solution, it can be effectively used for the electrochromic device constituting the present invention as a substantially solid electrolyte membrane which exhibits high ionic conductivity and mechanical strength.

In the present invention, the term "glass" is intended to include glass and synthetic resin products such as transparent acrylic resin plates. Explaining a specific example, in FIG. 1, from the top, the glass plate 11 and the transparent conductive film 1 are shown.
2, electrode II13, solid electrolyte membrane 14, electrode I15, transparent conductive film 1
6 and the glass plate 17 are laminated in this order.

The glass plate 11 may be a transparent resin plate. The transparent conductive films 12 and 14 are collector electrodes, and are made of indium tin oxide (IT
O), tin oxide, etc. As the solid electrolyte membrane 14,
For example, the one prepared as follows is used. For example, in a polyethylene microporous membrane, impregnated with an electrolyte solution of lithium trifluoromethanesulfonate as an electrolyte dissolved in polyethylene glycol monoether,
It has a thickness of 4 μm and an ionic conductivity of 2 × 10 ⁻⁴ S / cm.

There are two types of electrode I15, a cathodic material that undergoes reduction coloring and an anodic material that undergoes oxidation coloring.
Here, WO ₃ , which is a typical reducing material, is used. WO ₃ carries out a reversible reaction between WO ₃ (transparent) + H ⁺ + xe and H _x WO ₃ (blue) when H ⁺ (Li ⁺ ) from the electrolyte and electrons from a power source are injected. Although this reaction is reversible, H _X WO
_{When the} power circuit is opened in the state of ₃ , the blue color (reduction state) is maintained for a long time.

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 1.3 to 1.6 V and works as a light control glass that is variable between blue and colorless and transparent. Therefore, the floor lighting in which this electrochromic element is incorporated in the floor can be used as floor lighting capable of coloring, erasing and adjusting the light amount.

[0013]

According to the present invention, dimming of floor lighting is possible, and the degree of freedom of a comfortable space created by floor lighting is increased.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of an electrochromic device that constitutes floor lighting of an example.

[Explanation of reference numerals] 10 ... Light source 11 ... Glass plate 12 ... Transparent conductive film 13 ... Electrode I 14 ... Solid electrolyte film 15 ... Electrode II 16 ... Transparent conductive film 17 ... Glass film

Claims (1)

[Claims] 1. A dimming floor lighting, wherein an electrochromic element is incorporated into the floor lighting to enable dimming.