Device and method for control interface sensitive to a movement of a body or of an object and viewing screen integrating this device

摘要

A device for control interface sensitive to movement of a body, includes a detection surface; at least one capacitive sensor including a measurement electrode including an active surface facing the detection surface, or substantially coinciding with the detection surface; electronic excitation and processing components for exciting the measurement electrodes at an alternating electrical potential and processing the signals emanating from the capacitive sensors, to provide distance information between the active surface of the electrodes and one or several objects; a guard of electrically conducting material disposed in proximity to the measurement electrodes, at least along the face of the measurement electrodes substantially opposite to the active surface, which guard is excited at an alternating electrical potential substantially identical to the alternating electrical potential of the measurement electrodes, wherein: the measurement electrodes and the guard are made of substantially transparent conducting materials; and the device for interface is substantially transparent.

主权项

1. A device for control interface sensitive to a movement of a body or of an object, comprising:
a detection surface; at least one capacitive sensor, each said capacitive sensor including a measurement electrode including an active surface facing the detection surface, or substantially coinciding with said detection surface; excitation and measurement electronics referenced to a guard potential different from a ground potential, the excitation and measurement electronics configured for exciting the measurement electrodes at an alternating (AC) electrical potential and processing the signals emanating from said capacitive sensors, so as to provide distance information between the active surface of the measurement electrodes and one or several objects; and a guard of electrically conducting material disposed in proximity to the measurement electrodes, at least along the face of the measurement electrodes substantially opposite to the active surface, which guard is excited at an alternating (AC) electrical potential substantially identical to the alternating (AC) electrical potential of the measurement electrodes, wherein: the measurement electrodes and the guard are made of substantially transparent conducting materials; and the device for control interface is substantially transparent.