Half-tone printing with thermal ink jet using random spot distri

Details Half-tone printing with thermal ink jet using random spot distri Half-tone printing with thermal ink jet using random spot distri

1992-05-26

1993-08-03

Fuller, Benjamin R.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346140R, 358298, 358456, G01D 900, G01D 1516, H04N 173

Patent

active

052333663

ABSTRACT:
Areas of a predetermined gray-scale in a desired image are printed on a sheet by a linear array of ink-jet ejectors. The individual ejectors are operated according to a probability function which controls the frequency of a random activation of the ejectors as the sheet moves past the ejectors. The frequency of activation is a function of the desired gray-scale of the area being printed. The resulting spots on the sheet are distributed in uniform lines in one dimension and randomly in another dimension.

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patent: 4849768 (1989-07-01), Graham
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