| 摘要 |
A device and method for protecting a CRT screen. The device includes first and second amplifying circuits for amplifying a video signal input thereto and outputting an amplified signal; a buffer circuit for buffering the amplified signal and generating an output signal for a screen; a Vcc voltage sensing circuit for detecting a drop in a Vcc voltage during a power cut-off stage; and a transistor being turned on based on the detection and being connected at the input stage of the buffer circuit for eliminating AC and DC components of the amplified signal outputted from the second amplifying circuit so as to eliminate formation of a spot on the screen during the power cut-off stage.
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