Samsung Galaxy Note 4 could be thinner due to new patent
on the Qualcomm Snapdragon MDP 805 Tablet, a slate for developers that we told you about back in April. While that tablet is costly, use of ultrasound to replace the digitizer should allow Samsung to knock a few bucks off the price of the phablet.
Another advantage to using ultrasound is that it can slim down the device by as much as a millimeter. The Samsung Galaxy Note 3 is 8.3mm thick, so losing a millimeter there could really produce a nice svelte profile for an upcoming version of the Galaxy Note. However, it might be too late in the game for Samsung to use this patent for 2014, so we might have to wait for the Galaxy Note 5 to see a slimmed down phablet from Samsung.
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source: SamDownloads (translated)