| 摘要 |
A user interface device (20) for allowing people with and without impairment s to easily send and receive alphanumeric messages. The device includes a plurality of geometrically-shaped keys (24) slidably retained within a housi ng (21), each key being associated with a plurality of characters or symbols. T he device also includes a key driver system (30) that includes a processing component (22) configured to generate key motion signals according to output information, and key motion drivers (102) configured to drive one or more of the keys based on the generated key motion signals. The key motion drivers include motion component (28) configured to move the one or more keys in a directional plane approximately parallel to a surface of the keys, and key identifier components (26) configured to move a corresponding one or more ke ys of the plurality of keys in a directional plane approximately perpendicular to the surface of the keys.
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