Coded data generation or conversion – Bodily actuated code generator – Including keyboard or keypad
Patent
1988-07-20
1990-04-17
Yusko, Donald J.
Coded data generation or conversion
Bodily actuated code generator
Including keyboard or keypad
34082579, H03M 1100
Patent
active
049184458
ABSTRACT:
A keyboard and keyboard system for use in an electronic device having a plurality of keys. A matrix of keys in rows and columns with each key being defined by an intersection of a row and column wire is used. Either the rows or columns function as initial inputs and the other of the rows or columns function as an initial driver. After a key press, the initial input is changed to a secondary driver and all initial drivers are changed to secondary inputs. The secondary inputs are then read to detect which key has been pressed and the row and the column are connected at the appropriate intersection representing the key which has been pressed. The keyboard system decodes each intersection to define the representation of each key and the representation is communicated to the associated electronic device. A method for detecting input from a keyboard is also disclosed.
REFERENCES:
patent: 4148017 (1979-04-01), Tomisawa
patent: 4554530 (1985-11-01), Mussmann
patent: 4581603 (1986-04-01), Ingold et al.
"Using a One-Chip Microprocessor for TV Tuning & Remote Control" by E. Dreiske, IEEE Tras. on Consumer Elec., Feb. 1978.
Hewlett--Packard Company
Queen Tyrone
Yusko Donald J.
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