INKJET PRINTER UTILIZING SENSED FEEDBACK TO CONTROL TIMING OF FIRING PULSES
An inkjet printer comprises a printhead having a plurality of inkjet nozzles, a controller connected to the printhead for controlling a timing of firing pulses, and feedback lines for communicating sensed printhead feedback to the controller. The controller is configured to adjust the timing of the firing pulses in response to the feedback communicated to the controller from the printhead.
1 . An inkjet printer comprising:
a printhead having a plurality of inkjet nozzles, each nozzle having an associated actuator;
a controller connected to said printhead, said controller controlling a timing of firing pulses for actuators in said printhead; and
one or more feedback lines for communicating sensed printhead feedback to said controller,
wherein said controller is configured to adjust the timing of said firing pulses in response to the feedback communicated to said controller from said printhead.
2 . The printer of claim 1 , wherein said sensed printhead feedback informs said controller of a temperature of said printhead.
3 . The printer of claim 1 , wherein said sensed printhead feedback informs said controller of a voltage available to at least one actuator.
4 . The printer of claim 1 , wherein said sensed printhead feedback informs said controller of a resistivity of at least one actuator.
5 . The printer of claim 1 , wherein said sensed printhead feedback informs said controller of a width of a critical part of at least one actuator.
6 . The printer of claim 1 , wherein said nozzle actuator comprises a resistive heating element.
7 . The printer of claim 1 , wherein said inkjet nozzles are positioned on CMOS circuitry of said printhead.
8 . The printer of claim 7 , wherein said CMOS circuitry at least partially control nozzle firing in combination with said controller.
9 . The printer of claim 7 , wherein a nozzle footprint comprises a MEMS actuator overlying a CMOS drive transistor.
10 . The printer of claim 9 , wherein the nozzle footprint comprises a MEMS actuator overlying a CMOS drive transistor and a shift register.
11 . The printer of claim 9 , wherein the nozzle footprint comprises a MEMS actuator overlying a CMOS drive transistor, a shift register and a transfer register.