Laser diodes driving method e.g. for laser printer, has four-pole network connected between first laser diode forming cross-talk source and second laser diode forming cross-talk sink

摘要

Laser recording equipment i.e. laser printers and digital printing machines, having close arranged laser diodes, such as so-called laser diode bars comprising a number of tightly arranged laser diodes on a common substrate carrier and having individual electrically driven, controlled emitters often suffer from optical and thermal cross-talk. To allow for the fact that the cross-talk effect is dynamic, to effectively provide rapid modulation of the laser light beams in the laser recording equipment, an electric four-pole network (14) is connected between a first laser diode (5A) forming a cross-talk source, and a second laser diode (5B) forming a cross-talk sink, and the four-pole network receives the video-signal (VA) or the driver current (ITB) of the second laser diode. The output signal of the four-pole network is used as a correction signal (KAB) for the video signal.