Coded data generation or conversion – Bodily actuated code generator – Including keyboard or keypad
Reexamination Certificate
2008-03-04
2008-03-04
Wong, Albert K. (Department: 2612)
Coded data generation or conversion
Bodily actuated code generator
Including keyboard or keypad
C341S022000, C345S168000, C340S014100
Reexamination Certificate
active
07339499
ABSTRACT:
Keypad apparatus for registering signals corresponding to data that a user enters by pressure on keys of an array in a surface extending in two dimensions. The elements of first and second sets of impedance elements (R) are connected in series through respective interconnections and a signal processor applies first and second reference signals across the first and second sets of impedance elements respectively. User pressure on the keys makes or breaks connections through corresponding contact elements between a respective pair of the interconnections, one from the first set of impedance elements and one from the second set of impedance elements, so as to generate first and second output signals (PX1, PY1) that together are a corresponding combination of the first and second reference signals that is unique to the actuated key elements.
REFERENCES:
patent: 4532497 (1985-07-01), Danish
patent: 4810992 (1989-03-01), Eventoff
patent: 5036320 (1991-07-01), Wroblewski
patent: 5386584 (1995-01-01), Verstegen et al.
patent: 5929790 (1999-07-01), Lim
patent: 5943044 (1999-08-01), Martinelli et al.
patent: 6184805 (2001-02-01), Uggmark
patent: 6222466 (2001-04-01), Uggmark
patent: 6509846 (2003-01-01), Fujiki
patent: 0435438 (1998-03-01), None
patent: 0932117 (1999-07-01), None
patent: 1006545 (2004-08-01), None
Rotzer et al “Use of an A-D Converter in a Microcontroller for Key Decoding” Motorola Technical Developments, Motorola, Inc.; Schaumburg, IL, USA; vol. 20, pp. 108-109; Oct. 1993; XP000403840.
Freescale Semiconductor Inc.
Wong Albert K.
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