CAPACITIVE DONGLE FOR VISUALIZATION DEVICES HAVING A CAPACITIVE TOUCH SURFACE

摘要

The general field of the invention is that of the capacitive dongles (200) used with display devices having a capacitive touch surface comprising a matrix (110) of conductive lines and columns, the dongle being disposed on said touch surface in functional use. , the dongle operating in transmit mode and receive mode. The dongle according to the invention comprises: means for transmitting (230, 240) periodic analog signals transmitted at a specific frequency called "dongle" frequency; - A metal conductive piece (210) flat ring-shaped connected to said transmitting means, said piece to be placed on said touch surface; means (250, 260) for receiving signals received from said conductive metal part; means for analyzing (270, 280, 290) said digitized received signals; means for storing transmitted and analyzed signals; an interface (295) for digital communication.