Abstract: According to the present invention there is provided a button assembly, comprising, a platform having at least two electrodes; a dome member which comprises electrically conductive material, wherein the dome member is electrically connected to at least one of said at least two electrodes, and the dome is arranged so that at least a portion of the dome member overlays at least one other of the at least two electrodes, so that when the dome member is selectively collapsed inwardly by the application of force, the dome member will electrically contact said at least one other of the at least two electrodes, so that in its collapse state the dome member electrically connects the at least one of said at least two electrodes with the at least one other of the at least two electrodes; an interface member which comprises, (a) a compression member which is attached to the dome member at a position which overlays said at least one other of the at least two electrodes; (b) a restrictor member which is configured such tha
Abstract: According to the present invention there is provided a button assembly, comprising, an actuator member; a base member having a cavity defined therein which can receive a least a part of the actuator member; a flexible film which comprises piezoelectric material, wherein the piezoelectric material is preferably dipolar particles; a first electrode which is located between the piezoelectric material of the flexible film and the actuator member, and a second electrode which is located between the piezoelectric material of the flexible film and the base member, and wherein the flexible film is arranged to overlay the cavity in the base member, and to be interposed between the base member and the actuator member, such that moving at least a part of the actuator member into the cavity of the base member will cause the film to stretch thereby generating an electrical signal in the first and second electrodes.