ELECTRONIC CIRCUIT FOR DRIVING AN ARRAY OF INKJET PRINT ELEMENTS

摘要

An electronic circuit for driving an inkjet print element in an array of print elements with an electric waveform is provided. The print element comprises a piezotransducer for converting the electric waveform in a mechanical displacement. The electric waveform is tunable for an individual print element. The circuit comprises a common waveform generator that is connected to the piezo transducer through a first print data dependent switch for providing an electric waveform independent of the print element. The circuit further comprises a waveform tuning part, dependent on the print element and the print data, for controlling a second switch that adds electric energy from a voltage source to the electric waveform. The switches are operable in either a saturation state or a blocking state to limit an amount of dissipation in the switches.