Thermal printer and method for correcting the energizing...

Details Thermal printer and method for correcting the energizing... Thermal printer and method for correcting the energizing...

2007-12-04

2007-12-04

Tran, Huan (Department: 2861)

Incremental printing of symbolic information

Thermal marking apparatus or processes

Density control

C400S120150

Reexamination Certificate

active

11294606

ABSTRACT:
A thermal printer comprises: a ROM11for storing a heat history correction table; a RAM12for storing the density-related energizing time data for the first and second preceding lines printed immediately before the current line to be printed and the density-related energizing time data before a correction for the current line to be printed which includes a target dot T; and a control section for comparing the density-related energizing time data for the first and second preceding lines and the density-related energizing time data before a correction for both adjacent dots T1and T2of the target dot T with the density-related energizing time data before a correction for the target dot T to select reference data, and further for performing a corrective operation for the pre-correction energizing time data for the target dot T using thus selected reference data to calculate energizing time data for the target dot T to be printed, whereby it is possible to prevent the temperature of a thermal head from being reduced excessively.

REFERENCES:
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patent: 4912458 (1990-03-01), Comeau et al.
patent: 5483273 (1996-01-01), Fujimoto et al.
patent: 61015469 (1986-01-01), None
patent: 64001560 (1989-01-01), None
patent: A-06-255141 (1994-09-01), None
patent: A-07-052436 (1995-02-01), None
patent: 8244266 (1996-09-01), None

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