Coded data generation or conversion – Bodily actuated code generator – Including keyboard or keypad
Patent
1997-06-06
1998-11-03
Horabik, Michael
Coded data generation or conversion
Bodily actuated code generator
Including keyboard or keypad
341 22, 36470912, 345168, 400477, H03K 1794, H03M 1100
Patent
active
058315560
ABSTRACT:
An arrangement for providing key switch actuation detection which reduces the number of key switch inputs required at a key switch controller. A key scanning system for detecting the activation of keys on a key-based input device is provided, having a plurality of logic level sensors to detect and temporarily store logic levels on corresponding connection nodes. A plurality of switches, each coupled to one of the keys, provides a pattern of logic levels on the connection nodes in response to the activation of a particular key. A logic monitor is coupled to the logic level sensors to detect the stored logic levels and recognize the activation of the particular key based on the pattern of the stored logic levels. A method for performing key switch actuation detection that reduces the number of required key switch inputs is also provided.
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P. H. Buffard, "Key Coding Arrangement," IBM Technical Disclosure Bulletin, vol. 21, No. 11, Apr. 1979, pp. 4548-4549.
Edwards, Jr. Timothy
Horabik Michael
VLSI Technology Inc.
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