The Apple pencil and future iPhone displays could eventually include ultrasound tech
The Apple Pencil
Starting off with smartphone and tablet displays, it seems Apple is looking into adding ultrasonic technology to its panels eventually in the hope of improving sensitivity. This would be achieved by placing multiple layers on top of an acoustic touch panel. For those unaware, this type of panel uses transducers to transmit ultrasonic waves along a surface. Then, these are examined by a number of sensors that can determine the positioning of size and objects. Also, by employing more than one layer, these sensors may also be capable of calculating the pressure that is being applied, thus essentially acting as a 3D Touch replacement.
As this is still only a patent, there is no guarantee that Apple will add the technology to its devices. However, when the two implementations are combined together, the overall improvements to the accuracy and usefulness of the Apple Pencil could be improved drastically.
source: Apple Insider
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