Sharp PG-M20XL User Manual download pdf (Page 15)

Capacative Touch Screen (Option)

General

The TFT Touch Screen works according to the principle of a change in

analog capacitance. It has a glass screen with a transparent, thin-film

overlay on the surface. This is fully sealed and protected by a further

layer of clear glass. Electrodes on the edges of the screen provide a

uniform low-voltage field. As soon as you touch the screen with your

finger the contact point is “recognized” by the change in capacitance.

Because this takes place very quickly - 15 milliseconds after being

touched - the Touch Screen is optimally equipped for a number of

different requirements and applications.

GB - 8

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Sharp PG-M20XL User Manual Page 15