IDEX Biometrics ASA
Touch sensors with multi-state electrodes

Abstract:

In some embodiments, a method for detecting a portion of a user's body may be provided. The method may be performed by a system comprising a plurality of cells, each cell of the plurality of cells comprising a transmit electrode and a receive electrode. The method may include, in a first timeslot, applying a first driving signal to the transmit electrode of a first cell, and receiving a first measurement signal using the receive electrode of the first cell. The method may further include, in a second timeslot, applying a second driving signal to the transmit electrode of the first cell, and receiving a second measurement signal using the receive electrode of the first cell. The second driving signal may be inverted relative to the first driving signal.