Capacitive touch screen:
The property of this material is that it can store electrical charge. So the capacitive touchscreens basically stores electrical charge.
But for good, Human body can also store charge. So, when you touch this screen with your finger, some of these charges on the screen gets transferred to your finger. The oscillator circuits located at the corner of your system will then sense this decrease in the charge on screen and the spot the exact location where touch occurred, and then transfers this specified information to the touchscreen driver software.
Resistive touch screen, on the other hand is again made up of normal glass panel. However, this glass panel in this case is coated with three layers.
Two of these layers being conductive and resistive are kept apart using spacers while the third scratch-resistant layer covers the whole setup
When the resistive touch screen system is running, current flows through these layers. On a finger touch, the two layers get connected and change in electrical field occurs. The system calculates the coordinates of point of contact and passes them to touch screen driver software.
This blog compares the resistive and capacitive touchscreen technologies. The capacitive touchscreens work by measuring the electrostatic field changes between a coating on the glass and the human body which serves as a conductor. The layers are usually made of glass panel coated material so it can store the electric charge of the human body. The system continuously monitors the movement of each tiny capacitor to find out the exact area where the finger had touched the screen. The resistive touchscreens work by having a layer of conductive material under a layer of plastic over another layer of conductive material over glass. The two conductive layers are separated by a small gap and when our bare finger presses down on the plastic screen it changes the resistance of the area where we touched and can be measured. For me, since the capacitive touchscreen is made up of glass layers, the screen is a clearer and sharper than a resistive touchscreen that has a plastic layer over it.
ReplyDeleteThanks, l like you! l am wantysz, We have the capacitive touch digitizer manufacturer
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