How do touchscreens detect your finger's exact position?

Touchscreens know exactly where your finger is by using little dots that work together like a team.

Imagine you're playing a game on a tablet, and you tap the screen. The screen has tiny spots, think of them like a grid, and when you touch it, those spots send messages to tell the tablet where you touched.

Think of the touchscreen as a map with rows and columns, like a tic-tac-toe board but much bigger. Each spot on the screen is part of two teams: one that checks how far up or down your finger is, and another that checks how far left or right it is.

When you touch the screen, both teams send messages to the tablet. The tablet puts them together like a puzzle, up/down + left/right = exact spot, and knows exactly where your finger was.

It's like touching a magic cookie that tells you not just how many cookies you've eaten but also which one you picked! The screen uses these tiny messages to know where you tapped, so it can show you the right picture or letter.