Pattern memory for use in thermal recording

Details Pattern memory for use in thermal recording Pattern memory for use in thermal recording

1988-02-05

1989-05-02

Evans, Arthur G.

Recorders

Thermal recording

400120, G01D 1500

Patent

active

048272884

ABSTRACT:
A pattern memory for use in a thermal printer system stores a temperature-compensated pattern of a character to be printed on recording paper using a thermal print head having a plurality of heat-producing elements arranged in a single array is provided. The pattern is defined in the form of a dot matrix, each dot containing two or more binary data, each of which, if having a predetermined one of the two possible states, is associated with a predetermined activation time period for activating one of the heat-producing elements. The binary state of each of the two or more data in each dot is determined such that a level of heat produced by any of the heat-producing elements may be maintained at constant. In one embodiment having two binary data in each dot, the pattern is determined such that the one of the two data of a dot has "0" and the other has "1" if this dot is to be printed for a second time or more by the same heat-producing element in succession.

REFERENCES:
patent: 3845850 (1974-11-01), Herr et al.
patent: 4309712 (1942-01-01), Iwakura
patent: 4415907 (1985-11-01), Suemori
patent: 4464669 (1984-08-01), Sekiya et al.

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