| 摘要 |
A handheld apparatus includes a top surface that includes a touch screen defining a plurality of keys, and a bottom surface on an opposite side of the first surface. The apparatus further includes a processor and an actuator coupled to the processor and located on the bottom surface. The processor is adapted to detect an object moving across the keys and in response generate an actuation signal to the actuator to generate a haptic feedback on the back surface.
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