 Today, when you leave your PC, with common Windows default settings, it will stay unlocked for 5 minutes, and anybody can access your sensitive data without your password. On top of which, if the screen is left on for 5 minutes, it continues to draw power. Login procedures can be quite slow and painful, and waiting for your PC to wake up for a long time can be quite frustrating. Sometimes, people even like to peek over your shoulder to see what is happening on your screen. This can present big problems for personal privacy, and sometimes it can be quite distracting when we're pressing keys during presentations when we want to switch slides. At ST Micro Electronics, we've considered how the accumulation of all these seemingly minor points can be quite frustrating for users, and we've come up with an interesting and practical solution. The Time of Flight Sensor plus suite of algorithms are monitoring the presence of the user in front of their PC and the surroundings. The Time of Flight Sensor itself is hidden in the top bezel of the laptop screen. The SD Presence turnkey solution enables a variety of use cases. Walkway lock and screen switch off, which improves the security of your PC by detecting a lack of presence and switching the PC off, so other people can't access it, and in so doing also extending its battery lifetime. Here, the Time of Flight Sensor detects the user coming back to their desk and automatically starts the Hello Login authentication with no key press or delay of any kind. Intruder alert. Here, the system detects a human presence that is behind you and could be watching your screen over your shoulder, and then it raises a warning. Gesture recognition. This can be used to control your applications without having to touch either the keyboard or the screen or the mouse. For your information, the SD Presence solution is qualified at Intel and Microsoft for catalog sensors and modern standby. So, what is the Time of Flight Technical Principle and how does it enable the presence use case? Here, we can see that the benefits are that the Flight Sensor does an actual distance measurement, and it is independent of the target color, shape or reflectance. It uses invisible infrared light, and it is highly accurate and has very low power consumption. It is also contained in an all-in-one package with the emitter and receiver included, and it is easy to integrate and hide behind a cover glass on a PC or a laptop. The Time of Flight itself does not generate any image and ensures user's privacy, unlike a camera. For more information about the SD Presence solution and the associated hardware evaluation tools and software resources, please check out st.com slash tof. Also, we invite you to contact your local ST sales representative.