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You Asked:
How does a touch screen work? — Xavier, Chennai, India
Marshall Answered:
There are a couple of different ways, but the simplest to understand involves a grid of transparent wires etched onto the screen’s glass, along with a piece of plastic with another set of transparent wires resting above the glass. When a stylus (or finger) presses on the plastic, transparent wires connect together and the computer senses current flow. See How do touch-screen monitors know where you’re touching? for details.
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