Coded data generation or conversion – Bodily actuated code generator – Including keyboard or keypad
Patent
1997-09-24
1999-08-03
Horabik, Michael
Coded data generation or conversion
Bodily actuated code generator
Including keyboard or keypad
341 34, 341 26, 324678, H03K 1796
Patent
active
059331020
ABSTRACT:
A touch sensor switch that responds to touching, or even to the proximity of an object, is disclosed. The switch includes a number of capacitance elements, or touch pads, that produce an effective capacitance dependent upon the physical proximity of the object. A microcontroller under control of a program stored in a read-only memory causes its I/O port to set a transient voltage on each capacitance element as a logic level. Each transient voltage is at variance with the capacitive element's preferred voltage level. The program then reads the I/O port, and hence the logic levels of the capacitance elements, as the capacitive elements revert to their preferred voltage levels, and calculates the proximity of the object, or touching, from relationships among recorded signals. The circuit may also be embodied in an application specific integrated circuit.
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Miller Stephen J.
West Michael S.
Horabik Michael
Tanisys Technology, Inc.
Wong Albert K.
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