An electronic device includes a conductive n-type substrate, a Group III nitride active region, an n-type Group III-nitride layer in vertical relationship to the substrate and the active layer, at least one p-type layer, and means for providing a non-rectifying conductive path between the p-type layer and the n-type layer or the substrate. A vector detector detects an inter-frame motion vector in the stereoscopic image signal. The differential carrier forms journals which extend co-axially relative to the longitudinal axis and by means of which the differential carrier is rotatably supported in the sideshaft gears and wherein the sideshaft gears, in turn, are rotatably supported in the drive housing.