with discharge activated by high-frequency signals specially adapted therefor

Full Title

Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes > for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix > using controlled light sources > using luminous gas-discharge panels, e.g. plasma panels > with discharge activated by high-frequency signals specially adapted therefor