Patent ID: 6312080
Filing Date: 2001-11-06
Classification: B41J

Abstract:
A droplet deposition apparatus including:an ink actuator having a plurality of spaced walls defining ink channels, said walls having opposed sides provided with electrodes adapted to receive electric signals to deform said walls to cause ink in said channels to be ejected therefrom;a control unit including one or more current sources, each current source capable of producing an electrical current for defining wave forms of said electric signals;a temperature sensor for generating an amplitude control signal in response to a sensed actuator temperature; and,a power supply for providing a drive voltage to the control unit, said drive voltage having a voltage amplitude, the power supply having means for adjusting the amplitude of the drive voltage in response to the amplitude control signal, said power supply being separated in space from said control unit and from said actuator, and said electric signals including a controlled current.