Patent ID: 6491379
Filing Date: 2002-12-10
Classification: B41J

Abstract:
An electrostatic-type inkjet recording head comprising:a head portion having an ink chamber for storing ink, an ink ejection port for ejecting ink stored in the ink chamber, and a common electrode disposed proximate the ink ejection port for supplying electric charges to the ink in the ink chamber to generate an electrostatic force for ejecting the ink from the ink ejection port; ink supply means for supplying ink to the ink chamber; a counter electrode disposed opposite to and spaced-apart from the common electrode and proximate the ink ejection port of the head portion to form a microscopic gap between the counter electrode and the ink ejection port for receiving a recording medium; a plurality of recording electrodes disposed on a surface of the counter electrode as divisions associated with pixels of a recorded image, each of the recording electrodes extending generally perpendicular to a lengthwise direction of the common electrode; voltage supply means for applying predetermined voltages between the common electrode and the recording electrodes; and driving means for driving the recording electrodes by independently controlling the voltage applied to each of the recording electrodes in accordance with an image signal.