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Some HP monitors and laptops, such as the EliteBook, feature an ambient light sensor. This sensor detects the light level of the environment and adjusts the screen's brightness accordingly.
Your webcam might be shuttered, but an ambient light sensor is also a risk for being spied on. ... HP ZBook Ultra G1a 14 (Strix Halo APU) Workstation Laptop Review; ...
Ambient light sensors work by turning the nature of the light surrounding a device into a specific number value called lux (lx). Using Firefox Mobile on an Android device, Olejnik found the data ...
However, the ambient light sensor is of low sensitivity (at 1 lux level), and the contribution of screen fluctuation is heavily quantized to ≤5 bits per measurement.