Line thermal printer having driving pulses of variable pulse wid

Details Line thermal printer having driving pulses of variable pulse wid Line thermal printer having driving pulses of variable pulse wid

1991-03-15

1994-08-16

Fuller, Benjamin R.

Recorders

Thermal recording

B41J 236

Patent

active

053390997

ABSTRACT:
This invention is directed to provide a line thermal printer which controls a power supply quantity to a thermal head by high speed control below a second unit and can insure always a predetermined printing density. The line thermal printer includes circuit elements for multiplying a heat accumulation counter for counting cumulatively the number of dot data for each line by a heat radiation constant in a predetermined cycle and for controlling a power supply pulse width on the basis of the count value of the heat accumulation counter.

REFERENCES:
patent: 4535340 (1985-08-01), Moriguchi et al.
patent: 4590487 (1986-05-01), Noguchi et al.
patent: 4616941 (1986-10-01), Nagai
patent: 4814787 (1989-03-01), Doi
patent: 5066961 (1991-11-01), Yamashita
patent: 5109235 (1992-04-01), Sasaki

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