ST's FlightSense ToF sensor is hidden behind a cover glass in the bezel of a laptop and monitors the user’s presence in front of their PC. It detects when a user leaves the PC and prompts it be put into a low-power mode and locked. It also performs presence detection to enable facial recognition and touchless wake-up and sign-in to the PC.
The ST patented algorithm used in the system can distinguish an immobile person sitting in front of a PC from an inanimate object, such as a chair, without relying on video analytics from the power-hungry and potentially intrusive webcam.
Time-of-flight sensors represent an alternative to infrared proximity sensors which can be affected by the reflectivity of the subject. ToF sensors combine accurate target-range measurement with miniature size and low power consumption.
ST has a history of supplying Intel with components for use in laptop modules.
ST provided the MEMS scanning micromirror and control IC for use in the projection engine that is part of Intel's RealSense3D imaging system (see Intel selects ST micromirrors for human-machine interface ).
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