| 摘要 |
An opening compensation circuit is given to know which permits the improvement in the quality of the image when a multimedia image is presented and a RGB monitor which uses the same. A definition circuit is provided between the input terminals and a pre-amplifier. The lower value detection circuit of the definition circuit detects a lower value signal from between the R, G and B signals supplied from the input terminals and a differentiation circuit differs the lower value signal to provide a differentiation signal. An impulse amplifier circuit amplifies a differentiation signal component which corresponds to a portion wherein a change in black or white occurs with an arbitrary amplitude to produce a second differentiation signal. The second differentiation signal from the impulse amplifier circuit and the R, G and B signals supplied from the input terminals are added through adding circuits to effect the outline correction of the R, B and G signals. A CRT is driven by the R, G and B signals for which the outline correction has been carried out.
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