Vorrichtung zur Ansteuerung eines einen Bildschirm umfassenden Geräts

摘要

The device has a light source (9) for marking a certain region (41) on the screen (27), a light detector (11) for optical detection of a screen line in the marked region, a switch (15) for triggering the drive and a controller (3,5). The controller determines the position of the marked region on the screen on receiving a signal from the light detector and a screen line drive. The light source is laser and the light detector contains a focussing unit and photosensor.