"Capacitive touch sensing" is a capacitive sensing technique that is simple to construct and decode. This variant uses light charges distributed across the screen. When you touch the display with your finger, when the body conducts electricity, the current is interrupted (otherwise conducted). The point where this happens is detected by the software. Capacitive screens can be touched in multiple locations at the same time. Unlike most other types of touchscreens, they won't work if you touch them with a plastic stylus (because plastic is an insulator, preventing your hand from affecting the electric field).
Unlike some other technologies (resistive, infrared, surface wave, etc.) where the sensor is on the front and therefore more vulnerable, Projected Capacitive (PCAP) technology mounts the sensor foil behind a protective overlay, so it does not have a resistive touchscreen and other disadvantages, which means they are used in many high-quality and large-scale applications. Due to the appeal of touchscreens with projected capacitive, more and more consumers want devices that use this technology.
Capacitive touchscreens are widely used in ATM machines, retail point-of-sale terminals, car navigation systems, medical displays, and industrial control panels, and became very popular on touchscreen handheld devices after Apple introduced the iPhone in 2007.
PCAP touch screen has excellent multi-touch performance, durability, excellent optical transmittance (greater than 90%), scratch resistance, no aging symptoms, providing high performance in terms of accuracy, power consumption and refresh rate.
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