| 摘要 |
The present invention provides a method and apparatus for toner ejection printing that improves print quality by providing a pair of dummy electrodes positioned adjacent to the end shield electrodes, the dummy electrodes for improving print uniformity by maintaining a consistent charge environment for the aperture currently printing. The image recording apparatus is comprised of a developer supply for providing electrostatically charged toner particles, a printhead structure, the printhead structure having a first major surface and a second opposite major surface, wherein a plurality of gate electrodes B1, . . . Bn-1,Bn are formed on the first major surface of the printhead structure, a plurality of shield electrodes C1, . . . Cm-1,Cm are formed on the second major surface of the printhead structure, and at least a first dummy electrode Xp is formed on the second major surface adjacent to electrode Cm, the printhead structure including a plurality of apertures extending from the gate electrodes B1, . . . Bn-1,Bn to corresponding shield electrodes C1, . . . Cm-1,Cm, a back electrode disposed in opposed relation with a surface of the printhead structure, and a control circuit for applying controlled electrical signals to the printhead structure, the electrical signals causing the electrostatically charged toner particles to flow through selected apertures towards the back electrode. |
