On the flip side, touchscreens use capacitive sensing to detect pressure applied by a human finger. A touchscreen stylus relies on inductive resonance to detect pressure and translate it into brush strokes. There are primarily two technologies that touchscreens use to detect contact: inductive resonance and capacitive current detection. Under the best of circumstances, users are rewarded with a consistent digital experience that's nearly identical to its analog equivalent. A device and its software employ a variety of advanced algorithms to figure out which inputs are intended by the user. Palm rejection is the ability of a device like a tablet to differentiate between a stylus or a fingertip and a palm or a wrist, effectively “rejecting” unwanted contact.
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