CAPACITANCE DETECTION APPARATUS AND ELECTRONIC DEVICE
A capacitance detection apparatus and an electronic device are disclosed. The capacitance detection apparatus (10) includes: a sensing module (11), a connecting circuit (12), and a differential detection circuit (13) for detecting changes in capacitance of the sensing module (11); the sensing module...
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Format: | Patent |
Sprache: | eng ; fre ; ger |
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Zusammenfassung: | A capacitance detection apparatus and an electronic device are disclosed. The capacitance detection apparatus (10) includes: a sensing module (11), a connecting circuit (12), and a differential detection circuit (13) for detecting changes in capacitance of the sensing module (11); the sensing module (11) comprises: a substrate (111), and a first sensing layer (112) and a second sensing layer (113) respectively located on two sides of the substrate (111); a first sensing unit (1121) of the first sensing layer (112) is opposite to a second sensing unit (1131) on the second sensing layer (113), and the first sensing unit (1121) covers the second sensing unit (1131); the first sensing unit (1121) and the second sensing unit (1131) are electrically connected to the differential detection circuit (13) through the connecting circuit (12), respectively. When a detection object approaches the capacitance detection apparatus (10), the capacitance of the first sensing unit (1121) is influenced by the temperature and the detection object, and the capacitance of the second sensing unit (1131) is only influenced by the temperature. Through the capacitances of the first sensing unit (1121) and the second sensing unit (1131), the influence of temperature can be eliminated, the changes in capacitance caused by the detection object can be determined, and the detection accuracy of the capacitance detection apparatus (10) can be improved. |
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