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Portable computer and control method therefor

Image Number 3 for United States Patent #8134564.

A portable computer including a display unit, and a video processor generating and supplying a first video signal to the display unit, includes a video adaptor outputting the first video signal to the outside, and receiving a second video signal from an external input source, and a control unit for supplying the second video signal to the display unit when the external input source is connected to the video adaptor. Thus, the present invention provides a portable computer and a control method, which can receive a video signal from an external input source through one existing output port for outputting a video signal without adding a separate input port.

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