3D facial recognition has come into the spotlight after Apple’s introduction of Face ID in the iPhone X. Companies in the supply chain have also become the new focuses of inestors. In fact, 3D sensing technology has been around for years, but did not have commercial applications of facial recognition in smartphones until 2017. The reasons why it happened in 2017 can be explained in terms of components, modules andsubsystems, computing and systems, end-devices and applications.