Patent ID: 8471570
Filing Date: 2013-06-25
Classification: G06F,H03K

Abstract:
1. System for detecting and locating a tactile approach or the presence of a body close to a surface (PAD, TCH) comprising at least one series of conductors (II, III, IV, V, VI, VII and VIII, IX, X, XI, XII) arranged in at least one plane, wherein the surface comprising such a plurality of conductors is associated with a touch detection device (TDS) comprising: a polarization path (P), a reference path (R) and a detection path (S), addressing means (ICX) for selecting among said plurality of conductors ( . . . , IV, V, VI, . . . , IX, X, XI, . . . ) at least one first conductor (V) by connecting it to the polarization path (P), at least one second conductor (IV) by connecting it to the reference path (R) and at least one third conductor (VI) by connecting it to the detection path (S), means (PUS, PDS) for polarizing the polarization path (P), and a device for detecting and quantifying an unbalance between the reference path (R) and the detection path (S) caused by the polarization of the polarization path (P) and by the tactile approach or presence of the body, in order to detect and locate the tactile approach or presence of the body, wherein said device for detecting and quantifying said unbalance comprises: