×

Estimating local ejection chamber temperature to improve printhead performance

  • US 20030142159A1
  • Filed: 01/31/2002
  • Published: 07/31/2003
  • Est. Priority Date: 01/31/2002
  • Status: Abandoned Application
First Claim
Patent Images

1. A temperature control system for an inkjet printhead assembly, comprising:

  • a printhead assembly having ink ejection elements energizable by an electrical pulse having an amplitude and pulse width;

    a sensor coupled to the printhead assembly for generating a signal representative of the printhead temperature;

    a memory for storing current printhead operating parameters; and

    a controller for reading a nominal operating pulse width, the signal from the sensor and the printhead operating parameters, said controller calculates an adjusted pulse width using the nominal operating pulse width, the signal from the sensor and the current printhead operating parameters;

    wherein the controller uses the adjusted pulse width to control printhead temperature.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×