The global pandemic of the new coronavirus has changed people's perception of environmental health. Although the importance of hand washing, disinfection and wearing masks is emphasized, there are still many people who have not changed their original habits. They will directly touch the facilities and objects around their lives without disinfection. Unconsciously, they will be infected by hand touching the surface of the new coronavirus. .
As for the sensor on the touch panel, the multi-touch capacitive sensor type used in smart phones is a self-capacitance method that simply detects the touch position. The floating operation is to operate the lower touch screen at a distance of a few centimeters from the top of the screen, using hybrid capacitive, infrared (IR) sensors, etc. methods. In order to be able to operate in the air, basically in addition to increasing the sensitivity of the sensor and adopting anti-noise methods to prevent malfunction.