| 摘要 |
An improved cell phone arrangement has a centrally located orientation key, for referencing a location tactilely via the user's thumb, and the dialing keys arranged in a substantially circular arrangement around the orientation key, in an array having a relatively large diameter but within range of motion of the thumb. The keys are shaped and spaced for tactile reference, i.e., for dialing without the need to look at the keyboard after becoming familiar with it. Cardinal compass-points can be marked by distinct keys, which extend radially outwardly from the central reference point and are of different shape and feel from the dialing keys. The phone housing has finger ridges on one or both sides, and optionally a distinct ridge or bump on the back of the housing, for repeatable positioning of the hand.
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