| 摘要 |
The invention relates to touch sensor and a method for determining a position of a touch, the touch sensor comprising: - a substrate (2) having a touch surface (21) configured to be touched by a user; - at least one transmitter for exciting acoustic waves in the substrate (2); - a plurality of reflecting structures (5, 5a, 5b) arranged across the touch surface (21) for reflecting acoustic waves excited in the substrate (2); - at least one receiver for receiving acoustic waves evoked by the transmitter, wherein - the reflecting structures (5, 5a, 5b) and the receiver are arranged relative to one another in such a way that an acoustic wave excited in the substrate (2) by the transmitter is reflected at the reflecting structures toward the receiver, and - if the touch surface (21) is touched by a body part (6) of the user or a touching means operated by the user at least a part of the acoustic wave energy excited in the substrate (2) is converted into volume sound waves in the body part or the material of the touching means thereby modifying the acoustic waves propagating in the substrate (2); and - evaluating means configured for determining the position of a touch on the touch surface (21) using a signal generated by the receiver upon receipt of acoustic waves evoked by the transmitter. |
