Method of controlling printed density in thermal transfer record

Details Method of controlling printed density in thermal transfer record Method of controlling printed density in thermal transfer record

1991-04-19

1992-09-15

Fuller, Benjamin R.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346 76PH, 358298, G01D 900, G01D 1500

Patent

active

051481847

ABSTRACT:
A method of controlling printed density in thermal transfer recording, comprising the steps of: obtaining from first data representing, for each of a plurality of densities, a sum of absolute values of differences between a reference density corresponding to each of the densities and actual printed densities of the respective heating resistors, in response to input of gradational transfer data at a transfer density selected from one of the densities, fourth data representing the sum of absolute values at the density of the inputted gradational transfer data; multiplying third data representing the differences between a reference density corresponding to each of the densities and actual printed densities of the respective heating resistors at a specific one of the densities by a ratio of the fourth data to second data representing the first data at the specific one of the densities so as to obtain amounts of density correction for the heating resistors, respectively at the transfer density; and correcting the gradational transfer data by the amounts of density correction so as to drive the heating resistors on the basis of the gradational transfer data subjected to density correction such that transfer recording is performed.

REFERENCES:
patent: 4680646 (1987-07-01), Ikeda et al.
patent: 4985779 (1991-01-01), Gall

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