METHOD FOR KEYBOARD SCANNING AND A KEYBOARD APPLYING THE SAME
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United States of America Patent
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N/A
Issued Date -
Oct 3, 2013
app pub date -
Jan 31, 2013
filing date -
Mar 28, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A scanning method for a keyboard includes steps (A), (B), (C) and (D). In step (A), a controller is configured to disable each column line from a respective first resistor and to disable each row line from a respective second resistor, and to send a scan signal to a column line. In step (B), the controller is configured to enable one of the row lines with the respective second resistor, and to read a signal on the row line. In step (C), the controller is configured to repeat step (B) with another one of the row lines until all row lines have been read. In step (D), the controller is configured to repeat steps (A), (B), and (C) with another one of the column lines until all column lines have been scanned.
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