Thermal head driving/control apparatus

Details Thermal head driving/control apparatus Thermal head driving/control apparatus

1983-09-13

1986-05-06

Goldberg, E. A.

Recorders

Thermal recording

400120, 219216, G01D 1510

Patent

active

045875308

ABSTRACT:
A thermal head driving/control apparatus used to correct temperature conditions individually for heating elements constituting a thermal head employed according to a thermal-sensitive recording system in facsimile equipment. The device provides a correction signal for each printing signal provided to a heating element of a thermal head. The thermal head selectively prints dots in recording, bit by bit, to form an image made up of lines of bits. The correction signal is formed by counting the number of dots printed within the vicinity of a reference bit. The correction signal follows the primary printing signal for each bit of a line to additionally heat an element or not to achieve ideal printing of dot to maintain an associated substrate portion at a desired operating temperature resulting in a uniform printing concentration. The device of the invention can be employed in facsimile equipment to provide a temperature correction device which reduces uneven printing concentration.

REFERENCES:
patent: 4415908 (1983-11-01), Sugiura

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