| 摘要 |
<p>A daylight projector drive system, having an optico-electrical control system which operates via a projection programme incorporated into the transparent projection foil along one of its long edge, has a shutter or diaphragm blade designed to permit only part projection of the control program. The program support moves relative to this blade or plate at a continuous rate, powered by an electric motor drive system which is controlled through the operation of the optico-electronic control device.</p> |
