How to evaluate the home button of OPPO R9 and Meizu?

Hello, first of all, why should everyone pay attention to the appearance of the Home button of the mobile phone? Take apples for example. Apple has been a round home button since the first generation of iPhone, and subsequent products have continued this round button. Over time, as long as you see this, you will know that this is an Apple mobile phone, a continuation of family genes and your own inheritance. Coincidentally, Meizu, a domestic mobile phone manufacturer, also has a tendency to popularize the waist Home button in a full range of products. Starting from Meizu MX5, Meizu's Charm Blue Note2, Charm Blue 2, Meizu PRO 5 and Charm Blue metal all use Meizu's waist Home button, so it can be concluded that Meizu's mobile phone will still use this waist Home button. Therefore, everyone is very persistent in looking at the Home button of various manufacturers, one is to look at aesthetics, and the other is to see if they have continued their genes, or even to see if they have plagiarized. Although each Home button has its own characteristics, even the existence of a label, but the home button can not apply for a patent, so it is understandable to be used for reference. However, the interaction mode of the Home button can be patented. Meizu's Home button inherits the mBack interactive mode, which is also one of Meizu's patents. The core interactive carrier of mBack is the physical Home button on the front of the mobile phone, which has the functions of pressing and touching, corresponding to home and Back respectively, and also has the function of fingerprint recognition. Everyone can use the waist key on the Home button, and can't apply for a patent, so the popular front waist key doesn't mean that only Meizu can use it, but the interactive mode on the Home button, Meizu's mBack, is a patent of Meizu, and naturally only Meizu can use it, and this is the essence of Meizu mobile phone.