The presence sensor is a feature available on Windows 11 laptops that have an infrared camera that supports Windows Hello and a human presence detection HPD sensor. Typically, this sensor is built into the laptop's webcam. However, some laptops use an ultrasonic human presence detection sensor, eliminating the need for an infrared camera. Even mini PCs, which typically lack a webcam, can be equipped with such sensors.
For this tutorial, I'm using the ASUS Vivobook S 15 Copilot+ , which I recently reviewed. When I first stumbled upon Presence Sensing , I left the laptop on the couch for a minute with the screen open, as shown in the picture below.
I left my ASUS Vivobook S 15 Copilot+ on the couch
I went back to my desk to do something on my computer. When I returned to latvia telegram data the couch a minute later, I found my laptop with the screen off. At first, I was confused. Why did my laptop screen turn off so quickly? Was something wrong? It turns out there was no problem. In fact, it wasn’t a bug, but a feature called Presence Sensing that does exactly what it’s supposed to do.
And a minute later, Presence Sensing turned off the screen.
Unfortunately, Microsoft has not provided any information about Presence Sensing technology to the general public . However, I did some research and found some useful documentation from Lenovo that contained the following information:
Before using presence detection on Windows 11 laptops with an IR camera, you must enable Windows Hello facial recognition.
When presence detection is enabled, it regularly monitors whether you turn away from the display or walk away.