Method and apparatus for controlling the uniformity of print...

Details Method and apparatus for controlling the uniformity of print... Method and apparatus for controlling the uniformity of print...

2007-10-04

2009-06-09

Tran, Huan H (Department: 2861)

Incremental printing of symbolic information

Thermal marking apparatus or processes

Density control

C400S120090

Reexamination Certificate

active

07545401

ABSTRACT:
A method for controlling the print density of individual heating elements of a thermal print head array determines respective energy values for each heating element in response to image pixel data to be printed, multiplies determined energy values by a respective predetermined correction factor for one or more respective heating elements for improving print density consistency between individual heating elements, and dithers adjusted energy values from the step of multiplying as a function of adjacent image pixels.

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