Electronics notes/Touch screen notes

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Types

http://en.wikipedia.org/wiki/Touchscreen#Technologies

Capacitive

✎ This article/section is a stub — some half-sorted notes, not necessarily checked, not necessarily correct. Feel free to ignore, or tell me about it.

Capacitive sensing can sense anything that is capacitive (or somehow influences capacitance), which includes fingers or anything with a conductive tip - from specific styluses to sausages in latex gloves.

Designs usually try to only be sensitive to very nearby things (not far beyond a protective plastic/glass layer.

Has a few subtypes -- see capacitive sensing. One of them can be multi-touch, and multi-touch tablets are very usually capacitive.

Capacitive touch can be faster and more responsive than resistive. Some of the simpler/cheaper designs are less accurate than resistive, though; some handwriting recognition stuck with resisitive).

The screen itself can be built in a more robust way than resistive (sensors are under the top glass, not part of the top layer as in resistive).

Went from there-but-specific (e.g. in trackpads) in the nineties to pretty common (in MP3 players, and phone touchscreens) in the late noughties.