CAPACITIVE TOUCH PAD CONFIGURED FOR PROXIMITY DETECTION
First Claim
1. A method, comprising:
- controlling a touch pad having a plurality of row electrodes transverse to a plurality of column electrodes, the controlling including;
executing an object locate mode, the executing of the object locate mode including;
determining a plurality of first capacitances between a plurality of pairs of electrodes each pair of electrodes including one of the row electrodes that overlaps one of the column electrodes;
determining a presence of an object within a first distance of the touch pad by comparing each of the first capacitances with a first detection threshold; and
determining a position of the object with respect to the touch pad by analyzing the first capacitances;
executing a proximity detection mode, the executing of the proximity detection mode including;
determining a second capacitance between a first electrode and a second electrode of the touch pad; and
determining the presence of the object within a second distance of the touch pad by comparing the second capacitance with a second detection threshold, the second threshold being different from the first detection threshold.
1 Assignment
0 Petitions
Accused Products
Abstract
The present disclosure relates to a method for controlling a touch pad, comprising an object locate mode for locating an object on the touch pad comprising steps of: determining a measurement of capacitance of each of the pairs of electrodes of the touch pad, each pair comprising a row electrode and a column electrode transverse to the row electrode, comparing each measurement with a first detection threshold, and if the comparison of at least one measurement with the first threshold reveals the presence of an object on the touch pad, locating the object on the touch pad according to the capacitance measurements, the method comprising a proximity detection mode comprising steps of: determining a measurement representative of the capacitance between one or two electrodes and one or two other electrodes of the touch pad, and comparing a measurement obtained with a second detection threshold different from the first threshold.
24 Citations
41 Claims
-
1. A method, comprising:
-
controlling a touch pad having a plurality of row electrodes transverse to a plurality of column electrodes, the controlling including; executing an object locate mode, the executing of the object locate mode including; determining a plurality of first capacitances between a plurality of pairs of electrodes each pair of electrodes including one of the row electrodes that overlaps one of the column electrodes; determining a presence of an object within a first distance of the touch pad by comparing each of the first capacitances with a first detection threshold; and determining a position of the object with respect to the touch pad by analyzing the first capacitances; executing a proximity detection mode, the executing of the proximity detection mode including; determining a second capacitance between a first electrode and a second electrode of the touch pad; and determining the presence of the object within a second distance of the touch pad by comparing the second capacitance with a second detection threshold, the second threshold being different from the first detection threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A device, comprising:
-
a touch pad, having a plurality of electrodes disposed in rows and in columns that are transverse to the rows; an object detection circuit configured to manage the touch pad, the circuit being configured to operate in an object locate mode and a proximity detection mode, wherein; the object detection circuit is configured in the object locate mode to; determine a plurality of first capacitances on each of a plurality of pairs of electrodes of the touch pad, each pair of electrodes having a row electrode and a column electrode; compare the first capacitances with a first detection threshold, the first detection threshold configured to detect a presence of an object within a first distance of the touch pad; and determine a position of the object with respect to the touch pad based on the first capacitances that detected the presence of the object; the object detection circuit is configured in the proximity detection mode to; determine a second capacitance between a first electrode and a second electrode of the touch pad; and compare the second capacitance with a second detection threshold, the second detection threshold configured to detect the presence of the object within a second distance of the touch pad the second detection threshold being different from the first detection threshold. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
-
-
32. A processor, comprising:
-
a device configured to manage a touch pad that has a plurality of electrodes disposed in rows and in columns transverse to the rows, the device being configured to operate in an object locate mode and a proximity detection mode, wherein; the object detection circuit is configured in the object locate mode to; determine a plurality of first capacitances of each of a plurality of pairs of electrodes of the touch pad, each pair of electrodes having a row electrode and a column electrode; compare each first capacitance with a first detection threshold configured to detect a presence of an object within a first distance of the touch pad; and determine position of the object with respect to the touch pad from the first capacitances; the object detection circuit is configured in the proximity detection mode to; determine a second capacitance between a first electrode and a second electrode of the touch pad; and determine a presence of the object within a second distance of the touch pad by comparing the second capacitance with a second detection threshold that is different from the first detection threshold. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41)
-
Specification