Sensor device and method for grip and proximity detection

摘要

A sensor device is provided, with a first electrode structure and a second electrode structure, wherein the first electrode structure has a transmitting electrode, a compensation electrode and a reception electrode and wherein the second electrode structure has a number of field sensing electrodes. The first and the second electrode structure are coupled with an evaluating device. The evaluating device has a signal generator for supplying the transmitting electrode and the compensation electrode with an alternating electrical signal. The reception electrode, the transmitting electrode, the compensation electrode and the field sensing 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 one of the field sensing electrodes and a second alternating electrical field emitted at the compensation electrode may be coupled substantially only into the reception electrode.

主权项

1. Sensor device, comprising
at least one first electrode structure, wherein the first electrode structure comprises at least one transmitting electrode and at least one reception electrode, wherein the at least one reception electrode is capacitively coupled with the at least one transmitting electrode, at least one second electrode structure, wherein the second electrode structure comprises at least one field sensing electrode, wherein the at least one field sensing electrode is capacitively coupled with the at least one transmitting electrode of the at least one first electrode structure, and an evaluating device, which is coupled with the first electrode structure and the second electrode structure, wherein the transmitting electrode is supplied with a first alternating electrical signal and wherein the evaluating device is configured to evaluate a first electrical signal tapped from the reception electrode and a second electrical signal tapped from the at least one field sensing electrode.