Displays in a future iPad or iPhone could use lasers to detect touch, with the employment of VCSEL sensors and other technologies potentially monitoring the deflection of the screen to determine levels of 3D touch or to provide a more improved typing experience.
Current touchscreen technologies used in devices, like the iPhone and iPad among others, can use a wide array of techniques to detect when the user is touching the screen, or doing so with force. Existing methods include capacitive sensing, resistive sensing, ultrasonic sensing, and optical sensing.
With optical sensing in particular, the technology can be used to determine the deflection of the display from a finger press or pressure from a stylus. In a patent application published by the US Patent and Trademark Office on Thursday, Apple suggests it could improve upon existing methods.
Källa: Apple looking at Face ID laser tech to improve iPad & iPhone typing
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