A method of adjusting a quantity of ink supplied to a printing material by a printing machine includes adjusting the quantity of ink as a function of the printing speed and, upon the occurrence of a change in the printing speed, making a change in the quantity of ink as a function of area coverage to be printed; and an adjusting device for performing the method. The pixel electrode 14 is connected to a thin film transistor 155. The Nth voltage adder stage receives an input voltage VCC and a first voltage signal from the preceding stage, and provides a second voltage signal alternating between N*VCC and VCC. A comparison is made between the first and second voltages to determine the programmed state of the memory cell. The various regions represented as viewed can be selected based on the type of viewing activity is associated with a particular region. Each ball is captured in one of the pockets.