DIRECTIONAL CAPACITIVE PROXIMITY SENSOR
First Claim
Patent Images
1. A method, comprising:
- detecting an object near an electronic system that includes an electrically conductive medium forming a shield, an electrically insulating medium on the electrically conductive medium, and electrodes around a central area and on the electrically insulating medium, the detecting including;
determining measurements representative of a capacitance on the electrodes;
comparing the measurements with a detection threshold; and
deducing whether an object is near the central area in a detection field based on the comparing,wherein the determining includes simultaneously activating all the electrodes.
1 Assignment
0 Petitions
Accused Products
Abstract
The present disclosure relates to a method for detecting an object near an electronic system, comprising steps of: forming electrodes around a central area, on an electrically insulating medium, determining measurements representative of the capacitance of the electrodes, and comparing the measurements with a detection threshold, and deducing whether or not an object is near the central area in a detection, the electrically insulating medium on which the electrodes are formed being deposited on an electrically conductive medium forming a shield, the capacitance measurements being taken by simultaneously activating all the electrodes.
14 Citations
29 Claims
-
1. A method, comprising:
detecting an object near an electronic system that includes an electrically conductive medium forming a shield, an electrically insulating medium on the electrically conductive medium, and electrodes around a central area and on the electrically insulating medium, the detecting including; determining measurements representative of a capacitance on the electrodes; comparing the measurements with a detection threshold; and deducing whether an object is near the central area in a detection field based on the comparing, wherein the determining includes simultaneously activating all the electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
8. A proximity detection device, comprising:
-
an electrically insulating medium; electrodes surrounding a central area and on an electrically insulating medium; an electrically conductive shield on which the electrically insulating medium is positioned; a control circuit configured to control the electrodes, determine measurements representative of a capacitance on the electrodes, compare the measurements with a detection threshold, and deduce whether an object is near the central area in a detection field based on comparing the measurements with the detection threshold. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. An electronic system comprising:
-
system electronics; and a proximity detection device coupled to the system electronics and including; an electrically insulating medium; electrodes surrounding a central area and on the electrically insulating medium; an electrically conductive shield on which the electrically insulating medium is positioned; a control circuit configured to control the electrodes, determine measurements representative of a capacitance on the electrodes, compare the measurements with a detection threshold, and deduce whether an object is near the central area in a detection field based on comparing the measurements with the detection threshold. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
-
-
26. A proximity detection device comprising:
-
a plurality of electrodes surrounding a central area; an electrically conductive shield that includes an enclose conductive frame completely laterally surrounding the plurality of electrodes; an insulating medium that insulates the electrodes from the shield; and a controller configured to make measurements representative of a capacitance on the electrodes and determine whether an object is near the electrodes based on the measurements. - View Dependent Claims (27, 28, 29)
-
Specification