Printer capable of producing continuous tone prints from multi-b

Details Printer capable of producing continuous tone prints from multi-b Printer capable of producing continuous tone prints from multi-b

1996-04-16

2000-05-23

Wong, Peter S.

Incremental printing of symbolic information

Ink jet

Controller

347 43, 347 54, B41J 2205, B41J 221, B41J 204

Patent

active

060658223

ABSTRACT:
An ink-jet printer capable of providing a large number of gray levels delivers ink for each pixel through several nozzles for each color, with each nozzle corresponding to a bit of the pixel's image data word. The nozzle corresponding to the least significant bit of the image data word has a capacity to deliver an amount of ink just sufficient to produce 1/256 of the maximum desired density on the media. The second nozzle, corresponding to the next least significant bit of the image data word, has a capacity to deliver twice as much ink as the first nozzle. The third nozzle delivers twice as much ink as the second nozzle (and four times as much as the first nozzle), and so on. The last nozzle delivers 128 times as much ink as the first nozzle. Control of each nozzle is time-sequenced to print each pixel of the image as the printhead scans over the media. The ink is delivered to the image pixel according to the value of the image data word.

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patent: 5611630 (1997-03-01), Dolan et al.
patent: 5650803 (1997-07-01), Tamura et al.

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