A image signal process system was designed to be aplicable to Color PDP of NTSC-TV pictures by using parallel in serial out converter, through which input analog video signal was treated in real time with pulse memory driving method. Although pulse memory driving method promises enough gray scales and brightness, this method requires signal process clock frequency eight times faster than that of simple scanning method. In order to match the process speed with the sampling speed of input signal, eight parallel in serial out converter were arranged in a pair, in which data storage and data convertion are alternated. The sampling speed of video signal process system was 6MHz. A TV pictures with 128 gray scales were demonstrated by 60 frames per second on the Color PDP with 128×128 cells (0.66mm cell pitch).
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