| 摘要 |
A self-raster circuit of a monitor capable of providing color rasters to a cathode ray tube of the monitor if no video signal is inputted to the monitor from a computer. The self-raster circuit includes a detecting section for detecting whether or not a video signal is inputted to the monitor from the computer, and a control section for outputting a variety of pulse-width-modulated signals corresponding to predetermined colors to a video amplifying section of the monitor if it is detected by the detecting section that no video signal is inputted from the computer.
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