So far it's only a prototype - but the AD case can detect when the phone is falling and protract springs to make the phone bounce when it hits the ground, which should prevent any scratches or cracks on flat surfaces.
As can be seen from the video above, the AD Case adds minimal bulk to the phone while offering substantial protection against drop-shock.
A student from Aalen University in Germany has invented an "airbag" for smartphones.
After four years of tinkering, Frenzel created a "mobile airbag" that unfolds from the corners of a relatively-thin case when sensors detect that it's in free fall. We already have several case options in the market that can protect mobile devices from harm, such as cracks, scraps, water damage, and more. The impact caused the electronics inside the phone to break.
After picking it back up, the user can simply fold the springs back into the case so it's ready for the next drop. At the end of the day, a slim case is a small price to pay for keeping your expensive social-media-and-selfie-machine intact! Philip Frenzel from Germany came up with this case with airbag bumpers after-you guessed it right-dropping his phone and cracking the screen.
A German student named Philip Frenzel has patented a potential solution for this problem: the AD (active dampening) phone case. This allows your phone to bounce around harmlessly on the ground, greatly softening the impact. Frenzel also won the Mechatronics Prize 2018 awarded by by German Society for Mechatronics for his work.