Educational toy with question and answer cards - has corresponding series of question-actuating switches and answer-actuating pushbuttons

摘要

The light source is scanned to generate a video signal, signals representing parameters of a raster signal and the raster signal. A light box is scanned by a television camera to generate the video signal. A special purpose computer is programmed with the parameters defining the size, shape, position and structure of a raster signal which is then generated. The video signal and the raster signal are combined by the computer to generate the modified video signal supplied to a cathode ray tube. A still camera photographically records the displayed signal as the graphic desgin.