Patent ID: 7605771

Claim:
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.