Line head driving with batch-printing

Details Line head driving with batch-printing Line head driving with batch-printing

1993-02-24

1995-05-02

Tran, Huan H.

Incremental printing of symbolic information

Thermal marking apparatus or processes

Block driving

347 12, 347 13, B41J 2355

Patent

active

054124069

ABSTRACT:
A thermal head has a reduced power capacity and an electronic apparatus incorporates that thermal head. Printing data is stored in a shift register while ON-data for one line is latched relative to each block in a heating element array. A microcomputer checks the magnitude of the number of ON-data in each block. If the number of ON-data is equal to or less than a given value, the microcomputer outputs a strobe signal to that block so that the heating elements therein will be batch-driven. If the number of ON-data exceeds the given level, the microcomputer outputs two or more strobe signals to that block which in turn is further divided into two blocks. The two or more divided blocks are sequentially driven. In order to change the batch-printing range depending on the printing rate, the power capacity can be reduced to the minimum level within the necessary limit.

REFERENCES:
patent: 4638329 (1987-01-01), Nakayama et al.
patent: 4738553 (1988-04-01), Uemura et al.
patent: 5014135 (1991-05-01), Ijuin et al.
patent: 5072237 (1991-12-01), Takaoka

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