SENSOR DEVICE AND METHOD FOR GRIP AND PROXIMITY DETECTION

摘要

A sensor device is provided, with a first electrode structure comprising a transmitting electrode (SE), a compensation electrode (KE) and a reception electrode (EE) and with a second electrode structure compriings a number of field sensing electrodes (FE). The first and the second electrode structure are coupled with an evaluating device (A). The evaluating device comrises signal generator (G) for supplying the transmitting electrode and the compensation electrode with an alternating electrical signal (WS1),WS2). The electrodes are arranged in relation to each other in such a way that a first alternating electrical field emitted at the transmitting electrode may be coupled into the reception electrode and into at least one of the field sensing electrodes and a second alternating electrical field emitted at the compensation electrode (KE) may be coupled substantially only into the reception electrode (EE). Also a method is provided for detecting an encompassing of a hand-held device by a user.