CAPACITIVE DETECTION HAVING FUNCTION INTEGRATION
First Claim
1. A capacitive detection device comprising:
- at least one measurement electrode including an active surface,a guard made from an electrically conductive material placed adjacent to said measurement electrode(s), which guard is excited up to an alternating electric potential substantially identical to that of the measurement electrodes,first electronic means for exciting the electrode(s) and processing the measurement signals from the capacitive coupling of said electrode(s) with an object placed adjacent thereto, which electronic means are at least partly referenced to the electric potential of the guard,andmeans for performing another function, placed adjacent to said active surface, andsecond electronic means provided for monitoring said means for performing another function, which second electronic means are at least partly referenced to the electric potential of the guard.
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Accused Products
Abstract
A capacitive measurement device includes: at least one measurement electrode having an active surface; at least one guard made from an electrically conductive material placed adjacent to the measurement electrode(s), the guard being excited up to an alternating electric potential substantially identical to that of the measurement electrodes; and a first electronic device for exciting the electrode(s) and processing the measurement signals from the capacitive coupling of the electrode(s) to an object placed adjacent thereto, the electronic device being at least partially referenced to the electric potential of the guard. The measurement device further includes apparatus for performing another function, placed adjacent to the active surface, and a second electronic device provided for monitoring the apparatus for performing another function, the second electronic device being at least partially referenced to the electric potential of the guard.
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Citations
15 Claims
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1. A capacitive detection device comprising:
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at least one measurement electrode including an active surface, a guard made from an electrically conductive material placed adjacent to said measurement electrode(s), which guard is excited up to an alternating electric potential substantially identical to that of the measurement electrodes, first electronic means for exciting the electrode(s) and processing the measurement signals from the capacitive coupling of said electrode(s) with an object placed adjacent thereto, which electronic means are at least partly referenced to the electric potential of the guard, and means for performing another function, placed adjacent to said active surface, and second electronic means provided for monitoring said means for performing another function, which second electronic means are at least partly referenced to the electric potential of the guard. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification