| 摘要 |
A CRT-matrix type big screen display system having self-emitting type picture cells is provided with a deflection waveform as a sawtooth waveform and a deflection waveform in the other direction as a step deflection waveform crossing the picture cells. Inclination of the scanning line is eliminated so that fluctuations in display brightness thereto are avoided and a satisfactory picture display is achieved. Also in CRT-matrix type big-screen display systems, index elements or cells are provided between sets of primary color cells and in the scanning direction. At least at the start of the scanning operation, the index elements or cells are scanned and the positional information thereof is stored in a memory for use in processing a video signal to achieve a satisfactory picture display. Furthermore, prior to reproducing a picture, a photo pickup equipment is slidably moved across the big screen and positional information of primary color cells sensed thereby is stored in a memory, which positional information is used in processing a video signal so that a satisfactory picture is displayed. |
