Capacitive detection systems, modules and methods
First Claim
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1. A capacitive detection method, comprising:
- for at least one capacitive sensor in a capacitive sensing area, receiving data which is a monotonic function of capacitance of said capacitive sensor;
checking whether for at least one of said at least one capacitive sensor, received data or a function thereof has a predetermined relationship with at least one predetermined level; and
if, for at least one of said at least one capacitive sensor, received data or a function thereof has said predetermined relationship with said at least one predetermined level, then detecting that an object is present near said capacitive sensing area.
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Abstract
Capacitive detection systems, modules, and methods. In one embodiment, time interval measurement(s) are generated that are monotonic functions of the capacitance(s) of capacitive sensor(s) in a capacitive sensing area. In one embodiment, the generated time interval measurement(s), or any other monotonic function(s) of capacitance(s) of capacitive sensor(s) in a capacitive sensing area, may be analyzed to detect the presence of an object near the capacitive sensing area and/or to detect the position of an object near the capacitive sensing area.
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Citations
23 Claims
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1. A capacitive detection method, comprising:
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for at least one capacitive sensor in a capacitive sensing area, receiving data which is a monotonic function of capacitance of said capacitive sensor; checking whether for at least one of said at least one capacitive sensor, received data or a function thereof has a predetermined relationship with at least one predetermined level; and if, for at least one of said at least one capacitive sensor, received data or a function thereof has said predetermined relationship with said at least one predetermined level, then detecting that an object is present near said capacitive sensing area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A capacitive detection method, comprising:
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receiving data corresponding to two arrays of a plurality of capacitive sensors arranged in two dimensions in a capacitive sensing area, wherein received data corresponding to a sensor is a monotonic function of capacitance of said corresponding sensor; using said received data to detect presence of an object by determining whether received data or a function thereof corresponding to any of said sensors has a predetermined relationship with at least one predetermined level; and if presence of an object is detected, then for each array, using received data or a function thereof corresponding to sensors in said array to determine an unfiltered coordinate of said object in a corresponding dimension by performing the following; selecting which received data or a function thereof corresponding to sensors in said array will be used in determining said unfiltered coordinate; and calculating said unfiltered coordinate of said object in a weighted average calculation using each said selected received data or a function thereof to weight a coordinate of a corresponding capacitive sensor. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A controller module for capacitive detection, comprising:
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an interaction module configured, for at least one capacitive sensor in a capacitive sensing area, to receive data which is a monotonic function of capacitance of said capacitive sensor; and a presence detection module configured to check whether for at least one of said at least one capacitive sensor, received data or a function thereof has a predetermined relationship with at least one predetermined level; and
configured to detect that an object is present near said capacitive sensing area if for at least one of said at least one capacitive sensor received data or a function thereof has said predetermined relationship with said at least one predetermined level. - View Dependent Claims (16, 17, 18)
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19. A controller module for capacitive detection, comprising:
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an interaction module configured to receive data corresponding to two arrays of a plurality of capacitive sensors arranged in two dimensions in a capacitive sensing area, wherein received data corresponding to a sensor is a monotonic function of capacitance of said corresponding sensor; a presence detection module configured to use said received data to detect presence of an object by determining whether received data or a function thereof corresponding to any of said sensors has a predetermined relationship with at least one predetermined level; and a position detection module, configured if presence of an object is detected, then for each array, to use received data or a function thereof corresponding to sensors in said array to determine a coordinate of said object in a corresponding dimension, said position detection module including; means for selecting which received data or a function thereof corresponding to sensors in said array will be used in determining said unfiltered coordinate; and means for calculating said unfiltered coordinate of said object in a weighted average calculation using each said selected received data or a function thereof to weight a coordinate of a corresponding capacitive sensor. - View Dependent Claims (20, 21)
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22. A capacitive detection computer program product comprising a computer useable medium having computer readable program code embodied therein, the computer program product comprising:
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computer readable program code for causing the computer to receive, for at least one capacitive sensor in a capacitive sensing area, data which is a monotonic function of capacitance of said capacitive sensor; computer readable program code for causing the computer to check whether for at least one of said at least one capacitive sensor, received data or a function thereof has a predetermined relationship with at least one predetermined level; and computer readable program code for causing the computer to detect that an object is present near said capacitive sensing area if for at least one of said at least one capacitive sensor received data or a function thereof has said predetermined relationship with said at least one predetermined level.
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23. A capacitive detection computer program product comprising a computer useable medium having computer readable program code embodied therein, the computer program product comprising:
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computer readable program code for causing the computer to receive data corresponding to two arrays of a plurality of capacitive sensors arranged in two dimensions in a capacitive sensing area, wherein received data corresponding to a sensor is a monotonic function of capacitance of said corresponding sensor; computer readable program code for causing the computer to use said received data to detect presence of an object by determining whether received data or a function thereof corresponding to any of said sensors has a predetermined relationship with at least one predetermined level; and computer readable program code for causing the computer for each array if presence of an object is detected, to use received data or a function thereof corresponding to sensors in said array to determine an unfiltered coordinate of said object in a corresponding dimension, including computer readable program code for causing the computer to perform the following; computer readable program code for causing the computer to select which received data or a function thereof corresponding to sensors in said array will be used in determining said unfiltered coordinate; and computer readable program code for causing the computer to calculate said unfiltered coordinate of said object in a weighted average calculation using each said selected received data or a function thereof to weight a coordinate of a corresponding capacitive sensor.
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Specification