acting as light valves by shutter operation, e.g. for eidophor

Full Title

Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps (details of electron-optical or ion-optical arrangements H01J3/00) > Screens on or from which an image or pattern is formed, picked-up, converted, or stored; Luminescent coatings on vessels > acting as light valves by shutter operation, e.g. for eidophor