Incremental printing of symbolic information – Thermal marking apparatus or processes – Density control
Patent
1992-01-31
1997-04-29
Tran, Huan H.
Incremental printing of symbolic information
Thermal marking apparatus or processes
Density control
347211, B41J 236, B41J 2365
Patent
active
056253990
ABSTRACT:
A method and apparatus for controlling a thermal printhead. In response to a sequence of print commands, the method and apparatus generate an energization signal for each thermal print element in the printhead. In one embodiment, the energization is a function of at least the present print command and a future print command. In certain embodiments, the energization signal may also be a function of a past print command, print commands for at least one adjoining print element, and other parameters. Each print element in the printhead can, accordingly, be maintained at a proper temperature to ensure long printhead life and cause the printhead to generate sharp images.
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ABB HAFO,"IPC Users Manual Preliminary", Thermal Print Heads, Nov. 1989.
Millet Edward M.
Sweet Thomas A.
Wiklof Christopher A.
Intermec Corporation
Tran Huan H.
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