Coded data generation or conversion – Bodily actuated code generator – Including keyboard or keypad
Reexamination Certificate
2006-08-01
2006-08-01
Edwards, Jr., Timothy (Department: 2635)
Coded data generation or conversion
Bodily actuated code generator
Including keyboard or keypad
C345S168000, C200S600000
Reexamination Certificate
active
07084787
ABSTRACT:
A system and method for detecting key actuation in a keyboard assembly, which, in one embodiment, is used as a conductor to electrically communicate with an information appliance. The rows in the keyboard assembly are electrically isolated from one another, and each row contains keys bridging a two-wire bus. Each key has a switch that is closed during key actuation, a diode to polarize the key, and a resistor to provide a resistive load when the switch is closed and the diode is biased with the current flow. Alternatively, each key has a switch that is closed during key actuation, a timer with an output that goes high after a predetermined time period, and a resistor that provides an identifying load when the switch is closed and the output of the timer is high. Other features of the invention include a linear matrix coupled to a row of keys to allow the row to be scanned by sections and individual keys, and a flexible circuit that provides the electrical pathways for the linear matrix.
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Olodort Robert
Tang John
Turchik Randy
Blakely , Sokoloff, Taylor & Zafman LLP
Edwards, Jr. Timothy
Think Outside, Inc.
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