In general laptop design, it has hall sensor chip to make system enter sleep mode to turn‐off internal display
once the angle is under 15~20 degree in general between Cover and Base. Based on the design perspective, hall sensor
is triggering by magnetic object. Laptop will design a magnet on cover side to do such kind event. In fact, which means
that we don’ have any prevention solution to end user move magnetic something to close this hall sensor chip. So, the
laptop will enter sleep mode, turn‐off back light or something else in their setup once this unexpected magnetic object
to close hall sensor chip location.
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INC, HP, "PREVENT UNEXPECTED MAGNET TRIGGER CLAMSHELL SENSOR TO ENHANCE USER EXPERIENCE", Technical Disclosure Commons, (June 19, 2019)