Thermal printer drive control apparatus and method of controllin

Details Thermal printer drive control apparatus and method of controllin Thermal printer drive control apparatus and method of controllin

1990-10-03

1993-10-19

Fuller, Benjamin R.

Recorders

Thermal recording

B41J 232

Patent

active

052550117

ABSTRACT:
A thermal printer drive control apparatus of the type having a thermal print head comprising a plurality of heating elements provides for reliable cost effective thermal head temperature detection by means of producing multiple, different current flow intervals that are applied to binary data to produce data drive signals for the heating elements. The current flow intervals are based upon historical drive data derived from linear temperature conditions sensed at the thermal print head. This information is converted to a digitized representation for use in conjunction with a table placed in memory that provides predetermined current flow intervals based upon the digitized representation. Further, circuitry is provided to produce heating element drive signals having pulse widths based upon the determined current flow intervals.

REFERENCES:
patent: 4590484 (1986-05-01), Matsushita
patent: 4675695 (1987-06-01), Samuel
patent: 4845514 (1989-07-01), Mitsushima et al.
patent: 4983054 (1991-01-01), Nishiura
patent: 5025267 (1991-06-01), Schofield et al.

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