Method and apparatus for producing variable width pulses to prod

Details Method and apparatus for producing variable width pulses to prod Method and apparatus for producing variable width pulses to prod

1990-10-03

1993-03-09

Boudreau, Leo H.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358458, 358460, 358298, 346155, H04N 123

Patent

active

051930110

ABSTRACT:
A system for printing gray levels without needing to use halftone cells. An architecture is disclosed for controlling printing elements to deposit a variable amount of toner onto a given area of paper. The architecture includes a pixel memory for determining a gray level for each pixel in a row, and a counter for incrementing a gray level. A comparator compares a memory location corresponding to a certain pixel with the output of the counter, and the comparison result is then applied to a printing element corresponding to the pixel.

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