| 摘要 |
A color television receiver having an automatic white control circuit which includes a detection circuit for detecting whether or not a given magnitude of a cathode current of a CRT flows, and generating a detection signal when the cathode current exceeds the given magnitude; and an interruption circuit for interrupting the supply of a video signal to the CRT until a given period of time has elapsed after the generation of the detection signal. The heat-up of the cathode of CRT is detected by the generation of the detection signal. The interruption circuit makes the CRT free from the video signal for the given period of time after the heat-up, so that no raster with maximum brightness appears after the power-on of the television receiver.
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