How Does a Touchscreen Know Where You Tap?

💡 The Answer

• Capacitive touchscreens use a grid of electrodes that detect changes in the electrical field when your finger touches the glass.
• The controller calculates the exact position by measuring the capacitance change at each intersection point.
• Unlike resistive screens that rely on pressure, capacitive screens require direct skin contact for accurate detection.
• Modern screens also support multi-touch by tracking multiple points simultaneously with advanced processing.