The Ambient Light Sensor (ALS) is a hardware component found in many modern laptops, tablets, and desktop monitors. It detects the surrounding light conditions (ambient light) and automatically adjusts the display brightness based on the surrounding environment. This feature helps reduce eye strain and conserve battery life by dimming or brightening the screen according to the light levels in the room.
The Ambient Light Sensor (ALS) Windows driver is software that allows Windows to communicate with the ALS hardware and enable its functionality on your device. Without the driver, the ambient light sensor may not function properly, and the display's automatic brightness adjustment might not work.