Electronic watch including capacitive keys on its crystal
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United States of America Patent
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Mar 15, 2005
Grant Date -
May 23, 2002
app pub date -
Nov 1, 2001
filing date -
Nov 17, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
The watch is provided with a circular row of capacitive keys defined by transparent electrodes (21 to 32) arranged on the inner face of the crystal (5) of the watch and connected to a detection device via a multiplexer. These keys are activated by the person wearing the watch placing a finger (38) on the crystal facing one of the electrodes. The watch further includes means for detecting the position of at least one of the hands (8, 9) by means of the same detection device, using the electrodes (21 to 32) of the capacitive keys and/or other fixed electrodes (51).
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