Technical Specifications Of Capacitive Touch Screen

Accuracy: 99% accuracy.
Material: Fully scratch resistant glass material (Mohs hardness 7H), not easily scratched and worn by sharp objects, and not affected by common pollution sources such as water, fire, radiation, static electricity, dust or oil stains. It also has the eye protection function of goggles.
Sensitivity: less than two ounces of force can sense, and less than 3ms of rapid response.
Clarity: Three surface treatments (Polish, Etch, Industrial) are available for selection. The MTBF of the SMT controller is greater than 572600 hours (per MILHANDBOOK-217-F1).
Touch life: Any point can withstand more than 50 million touches, and the cursor does not drift after one correction.
Capacitive touch technology is a touch technology that utilizes the capacitance changes generated by touching the panel with a finger close to the capacitor. There are two important capacitance parameters for capacitive touch, one is the induced capacitance between the finger and the upper sensing material (such as ITO), and the other is the parasitic capacitance between the sensing materials (such as ITO upper and lower layers) or between the sensing material and the optical panel (such as ITO and LCD).
There will be parasitic capacitance between conductors, and when the finger conductor approaches the sensing conductor of different voltages, there will also be induced capacitance changes. The capacitance sensing effect is how to detect 0 at a large parasitic capacitance value (30 pico Farad; pF). 1-2 pF units of small induced capacitance changes. Capacitive touch technology is relatively stable and highly reliable. With the characteristic that the human body is a capacitor, the capacitive changes generated when touching the touch panel achieve the sensing touch effect. Christopher Ard, Marketing Director at Atmel, pointed out that sensor designs can be single sided ITO graphics for minimum functional interfaces, such as single touch points for large virtual buttons, sliders, and other applications. However, a more common implementation solution is a two-layer design (separate X and Y layers), which requires higher complexity, performance, and accuracy.