Stmicroelectronics (rousset) Sas

Stmicroelectronics (grenoble 2) Sas

Stmicroelectronics S.a.

Stmicroelectronics France

Laurent Beyly

Cyril Troise

Maxime Teissier

Olivier Richard

Kenichi Oku

An embodiment of the present disclosure relates to a method of detection of a touch contact by a sensor including a first step of comparison of a voltage with a first voltage threshold; and a second step of comparison of the voltage with a second voltage threshold, the second step being implemented if the first voltage threshold has been reached within a duration shorter than a first duration threshold, the second voltage threshold being higher than the first voltage threshold.

Device and method for touch sensing

The present disclosure relates to a method for measuring a capacitance of a pair of electrodes including charging the pair of electrodes and transferring the charge between the pair of electrodes and a sampling capacitor, and a measuring step representative of the capacitance of the pair of electrodes according to the voltage at the terminals of the sampling capacitor according to the number of cycles executed so that the voltage at the terminals of the sampling capacitor reaches a threshold voltage. According to the present disclosure, the method comprises an initial step of charging the sampling capacitor between a first voltage and a second intermediate voltage in between the first voltage and a third voltage greater than or equal to a ground voltage, the pair of electrodes being charged between the second voltage and the third voltage. The present disclosure applies in particular to the control of a touch pad.

Method for controlling a capacitive touch pad

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.

Directional capacitive proximity sensor

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.

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Peynier, France

Laurent Beyly