Capacitive Touch Charge Transfer Lateral Mode Technology 3

The main advantage of resistive technology lies in its simple interface electronic structure. The controller only needs to load a reference voltage on one pair of electrodes and measure the potential between the other pair of electrodes. This can be easily achieved using on-chip metal oxide semiconductor field-effect transistor (MOSFET) switches, analog multiplexers, and analog-to-digital converters (ADC). If ADC performs differential measurement, the measurement result actually becomes a ratio meter (Radiometric), which can be stimulated using VCC and ground. With appropriate design, it is entirely possible to obtain a resolution of 409096.  diode

On the contrary, the main drawback of this technology lies in the multi-layered structure of the touch screen. The base layer is usually glass, coated with a uniform layer of ITO on the surface, the top layer is usually made of polyethylene terephthalate (PET), the inner surface is also coated with a uniform layer of ITO, and the outer surface has a hard coating for protection, forming air gaps to separate these conductive layers. Small transparent spacing points are often generated during the printing process. The multi-layered structure of this material stack has an impact on transparency, generally reducing it to about 75% of the transparency of transparent glass. At the same time, air gaps may produce a thin mist effect, further reducing clarity. In addition, this structure is prone to scratching and damage, and due to the misalignment of mechanical axes, careful calibration is required to determine the X and Y coordinate ranges. Other weaknesses include the possibility of absorbing electrical noise, especially from liquid crystal displays (LCDs), which generally require filtering to prolong the response time. Of course, the controller can only handle one touch position at a time, which is also a major limitation.  diode