Gradation control device for thermal ink-transfer type printing

Details Gradation control device for thermal ink-transfer type printing Gradation control device for thermal ink-transfer type printing

1987-09-15

1990-01-09

Shaw, Clifford C.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358456, 346 76PH, 400120, H04N 140, H04N 121, H04N 123

Patent

active

048931900

ABSTRACT:
A gradation control device for a thermal ink-transfer type printing apparatus controls an applying time of a current to each of heating elements of a thermal printing head depending on a voltage drop introduced between a power source and the thermal printing head, so that it is possible to constantly print the same gradation level with the same printing dot size regardless of the printing data.

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