For the projected-capacitive touch screen

the key issue is to improve reliability and reduce cost by a very robust and reliable sensing circuitry

appropriate sensing layer patterns and corresponding algorithms. This paper presents a design scheme of capacitive touch sen-sing system based on the principle of relaxation oscillation

and uses the program on the projected-capacitive touch screens to test capacitance and analyze data to provide the basis to open up a single point or multi-point touch method.