Switching device for common keyboard, screen, and mouse

A switching device for common keyboard, screen, and mouse can make several sets of computer hosts share a screen, a keyboard, and a mouse, and it may decide which specific set of computer to be connected to the screen, keyboard, and mouse through the switching device, which includes:

• a human interface device (HID) processing unit, which may process the signal of the human interface device and it is corresponded to the application program of the chosen computer host to receive the corresponding signal transferred from the application program when the chosen computer receives the control signal from the keyboard;
• a compiler, which receives the signal output from the human interface device processing unit;
• a multiplexer, which is controlled by the signal output from the compiler to decide which set of computer to be able to be connected to the screen, keyboard, and mouse;
• and
• a hub, which is controlled by the human interface device processing unit and is also connected to the multiplexer, and which is connected to keyboard and the mouse as well.