High resolution transparent capacitive surface touch-type...

G - Physics – 06 – F

Patent

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G06F 3/033 (2006.01)

Patent

CA 2172328

Le dispositif de désignation tactile de l'invention comprend une surface capacitive transparente continue (1) supportée en ses coins par des lames flexibles (1A à 1D) sur lesquelles sont fixées des jauges de contrainte, une source d'alimentation HF (2), un condensateur série (3), un multiplexeur (4), un circuit de détection (6) et un calculateur (9). Les coins de la surface capacitive sont alternativement reliés à la tension HF, et les tensions relevées sont comparées à une table de valeurs, pour déterminer le point d'attouchement.

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