A Monolithically Integrated 128 Led-Driver and Its Application

Electrophotographic printing is one of the most attractive non-impact printing methods because it can be fast, compact, and of high quality. All electrophotographic technics need a light source of some kind, for instance a laser source or an LED array. The loser illuminates one point at a time and, therefore, requires a scanner to print a line serially. In contrast a linear LED array prints a whole line at a time. Due to the combination of active emission and parallel printing capability an LED-bosed printing unit can be made very compact and power efficient.