Surface Capacitive Touchscreen Monitors

How they work
When the layer is touched, it loses some of that current to the object that touched it and the curcuits placed in the corners of the monitor measure that decrease, and using something akin to cross-referencing these readings in each curcuit, it can tell how far away the point is from each curcuit, and the monitor driver software translates that data to the computer.

With only one layer for the emitted monitor light to pass through, the bulk of the clarity and image quality is retained, making surface capacitive touch screen monitors a better choice than the surface resistive touch screen models. This is also reflected in price, but makes an excellent choice in monitor for uses where clarity and detail are not required as much.

One of the drawbacks of this system is that, as the name suggests, the input device must be a conductor, in that it must be able to absorb electrical energy. In most everyday situations, this is often limited to a finger.

Surface Capacitive and other Touchscreen Technologies Video Reviews