FINGER-TIP TACTILE-SENSE INPUT DEVICE AND PERSONAL DIGITAL ASSISTANT USING IT

摘要

A finger−tip tactile−sense input device and a personal digital assistant capable of various input operations using a size recognizable by a tactile sense produced by moving finger tips. A finger−tip tactile−sense input device and a personal digital assistant comprise an input plate provided with a plurality of tactile finger−tip inputting protrusions, and an input control means capable of encoding an input signal when a tactile finger−tip inputting protrusion is depressed, characterized in that, when finger tips are moved on the input plate with the wrists fixed, the tactile inputting protrusions are disposed within a region encircled by an inverted egg−shaped curve C1 the surface of which is recognizable by touching with the finger tips of both hands.