Method and apparatus for detecting key actuations

Details Method and apparatus for detecting key actuations Method and apparatus for detecting key actuations

1996-08-23

1998-08-25

Zimmerman, Brian

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

341 22, 34082579, 379368, H03K 1794

Patent

active

057987165

ABSTRACT:
An electronic device (100) comprises a first plurality of keys (117), a second plurality of keys (119), and a processor (506) having a plurality of inputs (600) and an output (620). The output (620) is utilized to bias the plurality of inputs (600) at a first predetermined voltage during a first predetermined time period and at a second predetermined voltage during a second predetermined time period. An actuation of any one of the first plurality of keys (117) couples a unique combination of two inputs of the plurality of inputs (600) to the second predetermined voltage, and an actuation of any one of the second plurality of keys (119) couples a unique combination of two inputs of the plurality of inputs (600) to the first predetermined voltage. Thus, the processor (506) can detect actuations of the first plurality of keys (117) during the first predetermined time period and the second plurality of keys (119) during the second predetermined time period.

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Gardner et al., U.S.S.N. 08/685,122, "Method and Apparatus for Detecting Key Actuations", Attorney Docket No. CE01382R, filed Jul. 23, 1996.

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