Since Fujitus prototype Haptic Sensor Tablet revealed yesterday is all about touch, describing it will be like trying to explain how a steak tastes. But here goes: it works by emitting ultrasonic vibrations below the touchscreen, which can be pulsed with varying force on any region of the screen. Those oscillations actually push your finger off the surface of the tablet and, depending on the force, can give different tactile sensations.
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