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US 6,384,854 B1Granted
Printer using thermal print head
AssigneeFargo Electronics, Inc.
InventorsJohn J. Ibs, Robert E. Francis, Gary M. Klinefelter, Matthew K. Dunham
Life of this patent
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Abstract
A printer for printing an image onto a substrate includes a thermal print head having a plurality of electrical resistors, a supply of coloring material adjacent the print head for deposition on the substrate and a print head controller. The print head controller provides a pulse train output to at least one of the electrical resistors. The pulse train includes a plurality of pulses and at least one pulse has a variable width related to a binary value at least another pulse has fixed width.
Claims13
A printer for printing an image onto a substrate, comprising:
- a thermal print head having a plurality of electrical resistors;
- a supply of coloring material adjacent the print head for deposition on the substrate;
- a memory coupled to the print head having a plurality of memory locations, each coupled in a first sequence to a corresponding electrical resistor;
- and
- a print head controller adapted to receive a set of data bytes in a second sequence that is different from the first sequence, each byte corresponding to a gray scale setting for at least one electrical resistor, the controller including an output coupled to the memory to provide the set of data bytes to the memory in accordance with the first sequence.
2 more elements
Dependencies are inferred from the claim text.