US Patent 11954255 Haptic effect device

A device comprises a substrate layer having a first side and a second side. The second side of the substrate layer comprises at least one depression. The device comprises a touch-interface surface on the first side of the substrate layer. The device comprises at least one piezoelectric transducer on the second side of the substrate layer comprising a support plate and a piezoelectric element. The at least one piezoelectric transducer is aligned with the at least one depression of the substrate layer. The device comprises a printed circuit board layer electrically coupled to the piezoelectric element of the piezoelectric transducer. A device and a trackpad are provided.