Image-processing system capable of controlling multiple display devices

An image-processing system capable of controlling multiple display devices comprising:

• a power source for providing power to the image-processing system;
• a plurality of signal processing circuits each including:
• a first input end coupled to receive an image input signal;
• a second input end;
• and
• an output end for outputting an image output signal generated by signal-processing the image input signal;
• and
• a plurality of switching units each including:
• an input end coupled to the power source;
• an output end coupled to the second input end of a corresponding signal processing circuit;
• and
• a control end coupled to receive a control signal, the corresponding signal processing circuit being electrically connected to the power source or isolated from the power source according to the control signal;
• wherein each signal processing circuit includes a transistor having a first end coupled to the second input end of the signal processing circuit, a second end coupled to ground, and a control end coupled to the first input end of the signal processing circuit for enlarging the image input signal received at the control end of the transistor.