| 摘要 |
<p>The method is for varying the light transmission power between a first space and a second space using a "wall" containing a nematic liquid crystal placed between the two spaces and subjected to an electrical field. The "wall" comprises two transparent sheets enclosing a nematic liquid crystal, the space between the sheets being divided up by electrodes between which an electrical voltage may be established. The face of each sheet makes contact with the liquid crystal and may be coated with a thin transparent film of electro-conductive metallic oxide, and a voltage may, in this case, be established between the two films. The liquid crystal may be mixed with a colourant. The two sheets may be of thermosetting plastic material or of glass.</p> |
