How does a touchscreen know where you tap?
Electric Fingerprint Hunt
How does a touchscreen know where you tap?
You tap a video, swipe through photos, zoom into a map — and the screen just knows. No buttons, no mouse, just your finger landing exactly where you want it. How does a flat piece of glass figure out where you touched?
Hidden inside the glass is an invisible grid made of electricity. Imagine a checkerboard where every square is always humming with a tiny electric charge, waiting. You can't see it, but it's there — covering the whole screen, corner to corner.
