The method includes: calculating positional and angular magnification distributions of rays reflected by a reference aspheric surface on a light-receiving sensor and on a sensor conjugate surface; measuring a first wavefront of a reference light on the sensor; and calculating a second wavefront of the reference light on the sensor based on a parameter of an optical system. The input buffer includes an output terminal and a first test mode input terminal adapted to disable the output terminal in response to a first test mode signal. A first electrode is formed between the first and second portions of the bank layer. The base position is defined as the position with the smallest fringe density. A plurality of heat sensors spaced laterally across the substrate path measure the surface temperature of substrate heated areas corresponding to the heating zones being operated and maintain an automatic set point temperature. A latch not using absence-of-signal as a state is also provided.