The proximity sensor, a component in many Android devices, detects when an object is close to the screen. This is most commonly used during phone calls to turn off the display when the phone is held to the ear, preventing accidental touches. It operates by emitting a light beam and measuring its reflection, determining the distance of nearby objects.
This feature is intended to conserve battery life and prevent unintended actions. In certain situations, however, the sensor may malfunction, causing the screen to turn off unexpectedly during calls or exhibit erratic behavior. Understanding the function of the sensor is crucial before attempting to modify its operation, as doing so may impact device functionality.