| 摘要 |
A direct electrostatic printing device and method for printing an image with a simple printhead structure. According to the invention at least one control electrode of an aperture, is controlled in three different phases thereby removing the necessity of separate deflection control electrodes for deflection and size control of toner jets. A control unit controls at least one control electrode of each aperture in three phases during a print sequence which permits the transport of a toner jet, a first phase of creating a toner jet, a second phase of controlling the created toner jet, and a third phase of recovery, by means of predetermined voltages. Permission and restriction of transport of toner jets and toner jet tracetory control is according to the invention controlled by the same at least one control electrode. Further the one or more control electrodes of an aperture encompasses an aperture in question less than 100 %, preferably asymmetrically placed in relation to a relative movement between the printhead structure and an image receiving surface.
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