Printer controller for controlling an ink dot size

Details Printer controller for controlling an ink dot size Printer controller for controlling an ink dot size

2008-11-11

2010-12-28

Huffman, Julian D (Department: 2853)

Incremental printing of symbolic information

Ink jet

Controller

C347S019000

Reexamination Certificate

active

07857410

ABSTRACT:
Provided is a printer controller for an inkjet printer having a printhead with a plurality of nozzle arrangements, a paper transport mechanism, and an authentication chip. The controller has a data bus and purpose-specific functional units connected to the data bus. The controller is configured to execute software to control a dot size of ink discharged by the respective nozzles by heating the ink in a nozzle by applying at least one firing pulse of a duration less than a duration required to discharge an ink dot, sensing the temperature of the heated ink in the nozzle, and loading and updating a table having sensed values of temperature of ink in the nozzle, resistivity of an actuator heater of the nozzle and width of at least part of the actuator heater. The controller then changes the duration of a firing pulse used to discharge an ink dot in response to the updated table of sensed temperature, resistivity and width values so as to produce a uniform ink dot size.

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