Thermal printer and method of controlling a thermal print head

Details Thermal printer and method of controlling a thermal print head Thermal printer and method of controlling a thermal print head

1993-07-22

1994-11-15

Fuller, Benjamin R.

Recorders

Thermal recording

347 17, 347 61, B41J 2375, B41J 236

Patent

active

053652576

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: 4845514 (1989-07-01), Mitsushima et al.
patent: 4912485 (1990-03-01), Minowa
patent: 4983054 (1991-01-01), Nishiura
patent: 5255011 (1993-10-01), Minowa et al.

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