| 摘要 |
<p>An image is projected onto a screen, wall or other surface of inscription -inscribed on an opaque material. The inscriptions are made by the displacement of a stylus on a transparent support covered by an opaque film. The stylus has a point (1) causing the local destruction of the film. The transparent support is made up of an insulating material, and the opaque layer is a thin electrically conducting film. The film can be locally destroyed by the passage of an electrical current. The current being conducted to the film by the stylus which has a conducting point which is connected to one terminal of a supply source. The conducting film being connected to the other terminal of the supply source.</p> |
