Capacitive keyboard with non-locking reduced keying ambiguity

Details Capacitive keyboard with non-locking reduced keying ambiguity Capacitive keyboard with non-locking reduced keying ambiguity

2006-04-12

2010-10-26

Wong, Albert K (Department: 2612)

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

C341S026000, C345S173000, C400S479100, C200S600000

Reexamination Certificate

active

07821425

ABSTRACT:
Keyboards, keypads and other data entry devices can suffer from a keying ambiguity problem. In a small keyboard, for example, a user's finger is likely to overlap from a desired key to onto adjacent ones. An iterative method of removing keying ambiguity from a keyboard comprising an array of capacitive keys involves measuring a signal strength associated with each key in the array, comparing the measured signal strengths to find a maximum, determining that the key having the maximum signal strength is the unique user-selected key, and maintaining that selection until either the initially selected key's signal strength drops below some threshold level or a second key's signal strength exceeds the first key's signal strength.

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