Device for an electrothermal printhead drive

Abstract

Abstract Arrangement for actuating an electrothermal print head drive, having memory means (7) with a microprocessor control (5) for an electrothermal printing unit (3) and having a current collector electrode (6), energy for the electrodes of the electrothermal printing unit being provided from a controllable current source or voltage source, the number of electrodes which are temporarily connected to the controllable energy source (1) being predetermined by the microprocessor control (5) which outputs a control signal, which corresponds to the dependence on the number of driven electrodes, to the controllable energy source which feeds the electrodes which are temporarily connected to the latter via a switching unit (2) with a current or the voltage whose level has a dependence on the temporarily different number of actuated electrodes such that a larger number of electrodes are supplied with a higher current or voltage than a smaller number. <IMAGE>

Inventors

• 👤 Günther Stephan

Bibliographic Details