A magnetic direction sensor, comprising a first array of magneto-resistive elements, said array having a first array primary direction and wherein some but not all of the magneto-resistive elements are wholly or partially provided at a first angle to the primary direction, and the remaining elements are also inclined with respect to the primary direction. Further, the apparatus of the present invention solves problems ascribable to patches used to sense image density. The embedded signals are then transmitted from the timing controller to each source driver via a corresponding pair of differential data lines of the EDDS interface. A locking mechanism allows the scope and camera to be fixed from relative rotation. If the predicted amount of motion is large, a mode defining a broad search area and a coarse search resolution is selected. The joint elements are respectively connected to two sides of the upper die base and the lower die base.