The Synaptics optical sensor announced on Tuesday sounds a lot like what Samsung is trying to achieve. Its fingerprint sensor, named the Natural ID FS9100, is designed to exist under the cover glass of smartphones and tablets. It's scratchproof, waterproof and has a security layer that can tell the difference between fake and real fingers -- a problem with previous generations of optical scanners. The FS9100 optical sensor claims to be very thin and use up little battery power.
Whether this is the optical sensor we've been hearing about for the S8 or not depends on one crucial aspect: time. According to the announcement, the FS9100 optical sensor is slated for mass-production in Q2. If Samsung delays the Galaxy S8 while it strives to avoid repeating the same mistakes made with the exploding Galaxy Note 7, the two timelines could match up.
When asked about incorporating Synaptic's optical sensor, Samsung declined to comment.
Samsung isn't the only tech manufacturer looking to ditch the home button and make its devices bezel-less. Apple is also rumored to release iPads next year with no home buttons and minimal borders around the display, and so are Microsoft (here) and Chinese phone maker Xiaomi, with that Mi Mix I mentioned above. If device makers with trademark home screen buttons want to achieve full-display nirvana, they're going to have to find a new home for the fingerprint sensor: either integrated into the screen or somewhere else on the phone, like the back or side.