Ink jet type head for pigment type ink with different pulses app

Optical: systems and elements – Holographic system or element – Using a hologram as an optical element

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347 20, 347 40, 347 52, G02F 11343

Patent

active

057424128

ABSTRACT:
An ink jet type head has a plurality of ink ejection electrodes in a form of parallel strips formed on a base. The ink ejection electrodes include first ejection electrode and second ejection electrodes provided adjacent to two sides of the first ejection electrode. There is provided a voltage driving unit for applying an ejection voltage for ink ejection to the first ejection electrode. In the voltage driving unit, the ejection voltage to cause the ink to be ejected is applied to the first ejection electrode and an auxiliary voltage ineffective to cause the ink to be ejected is applied to the second ejection electrodes. This enables the reduction of potential differences between the first and second ejection electrodes, thus suppressing movement of color particles of the ink between them.

REFERENCES:
patent: 5552809 (1996-09-01), Hosono et al.
patent: 5619234 (1997-04-01), Nagato et al.

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