Thermal printing method and thermal printer

Details Thermal printing method and thermal printer Thermal printing method and thermal printer

1997-04-18

1999-04-20

Le, N.

Incremental printing of symbolic information

Thermal marking apparatus or processes

Density control

347184, 347188, 40012009, 40012015, B41J 236

Patent

active

058961607

ABSTRACT:
A thermal printer using a thermal head having a plurality of heating elements arranged in line, wherein the heating elements are driven for different power conduction times to record dots at different densities. According to the invention, the thermal printer is comprised of a first look-up table for converting original heating data into time data representative of a power conduction time corresponding to the original heating data; a correction circuit for correcting the time data to obtain a corrected power conduction time; a second look-up table for converting the corrected power conduction time into corrected heating data which corresponds to the corrected power conduction time; and a head driver for driving the heating elements in accordance with the corrected heating data.

REFERENCES:
patent: 5115252 (1992-05-01), Sasaki
patent: 5153605 (1992-10-01), Ohara et al.
patent: 5528276 (1996-06-01), Katsuma
patent: 5546113 (1996-08-01), Izumi
patent: 5585833 (1996-12-01), Matumoto
patent: 5608333 (1997-03-01), Katsuma
patent: 5610649 (1997-03-01), Kokubo

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