G09G 3/001

Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes {using specific devices not provided for in groups [CPC: G09G3/02] - [CPC: G09G3/36], e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background }