Density controlled thermal print head

Details Density controlled thermal print head Density controlled thermal print head

1988-12-15

1991-04-30

Reynolds, Bruce A.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346 76PH, G01D 1510

Patent

active

050122584

ABSTRACT:
A device for driving a thermal print head having a plurality of heat-producing elements arranged in the form of a single array for use in a thermosensitive or thermal transfer recording apparatus is provided. The drive device includes a void data counter for counting void data in the data of an image signal for each of the plurality of heat-producing elements and an adjusting unit for adjusting the level of a preheat energy to be supplied to each of the plurality of heat-producing elements in accordance with the void data count for the corresponding heat-producing element.

REFERENCES:
patent: 4454516 (1984-06-01), Moriguchi et al.
patent: 4560993 (1985-12-01), Hakoyama

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