Density gradation control type thermal printer

Details Density gradation control type thermal printer Density gradation control type thermal printer

1988-10-24

1990-01-16

Reynolds, B. A.

Recorders

Thermal recording

358298, 400120, G01D 1510

Patent

active

048947121

ABSTRACT:
Disclosed is a density gradation control type thermal printer which comprises: a plurality of heating resistor elements arranged so as to correspond to a plurality of picture elements on every print line with one-to-one correspondency; selectively energizing the heating resistor elements be in current conduction each for a time of an integer multiple of a current conduction unit time for every print line to thereby give density gradation to the picture elements; and selectively energizing the heating resistor elements in a descending order of current/conduction time for every print line, and making the heating resistor elements terminate current conduction at the same time or in the ascending order of current conduction time.

REFERENCES:
patent: 4532523 (1985-07-01), Tanaka

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