Wireless transmitter installed at touch screen for bi-directional signal transmission, and wireless transmission module installed between touch screen and computer system

A wireless transmission module installed between a touch screen and a computer system, and the touch screen receiving an image signal in a form of a wireless transmission signal outputted from the computer system, and driving the touch screen to display an user's touch control instruction signal to the computer system, and the wireless transmission module comprising:

• a first wireless transmitter, installed at the touch screen, and having a first signal output portion and a first signal receiving portion, and the first signal output portion and the first signal receiving portion being coupled to the first signal transmitter;
• a second wireless transmitter, installed at the computer system, and having a second signal output portion and a second signal receiving portion, and the second signal output portion and the second signal receiving portion being coupled to the second signal transmitter;
• wherein an image signal of the computer system is transmitted from the second signal output portion to the first signal receiving portion and displayed on the touch screen, and a touch control instruction signal generated by the touch screen is transmitted to a second signal receiving portion of the computer system through the first signal output portion for controlling a data processing unit installed in the computer system, so as to perform bi-directional wireless signal transmissions between the touch screen and the computer system by the first and second wireless transmitters of a single wireless transmission module.