Block-divided driving of a thermal printhead

Details Block-divided driving of a thermal printhead Block-divided driving of a thermal printhead

1985-07-16

1987-01-27

Evans, Arthur G.

Recorders

Thermal recording

400120, 364519, G01D 1510

Patent

active

046397418

ABSTRACT:
A thermal printhead driving system of the present invention is to be applied to the case in which a print line is divided into two or more blocks and the print line is driven block by block from one end to the other in sequence. In accordance with the present driving system, a dot of interest is monitored as to whether it is a dot at each end of a block or not, and this information is used to differently define an address which is used to access a predetermined table of driving energy levels. In the preferred embodiment, the address is so defined to access an increased energy level if the dot of interest is an end dot of a block thereby providing an increasing level of driving energy to the end dot, so that a printed image high in quality can be obtained even with a block driving scheme.

REFERENCES:
patent: 4415408 (1983-11-01), Sugiura
patent: 4536774 (1985-08-01), Inui et al.

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