This invention relates to an apparatus for scanning substrates through an ion beam in the process chamber of an ion implanter. The display has a pixel transparent conductive film electrode and a transparent conductive film counter electrode formed on an insulation film, which in turn is formed on a first substrate to cover the pixel electrode. The photovoltaic device may include a third energy absorbing surface being substantially perpendicular to the first energy absorbing surface and the second energy absorbing surface. Accordingly, when a new set of operations is received, input data is predicted for the new set by applying the pattern type to the new set.