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Proceedings Paper

Nonuniformity correction in LED printing with plural resolution recording
Author(s): Yee S. Ng; Hieu T. Pham; Robert Laird
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Paper Abstract

Binary LED printbars in general have exposure non-uniformity associated with lens transmission nonuniformity LED brightness variations and electro-optical crosstalks (e. g. rise time degradation optical power starvation cross-talk noise as a function of LED pixels usage) that need to be corrected for a high quality printing system. We have designed a constant current Si driver array with two independent power supplies (logic and LED powers) coupled with an improved LED printhbar system to minimize the cross-talk artifacts. In order to improve on the average exposure uniformity of the LED printing system individual trimmable current source to each driver array is also provided. In addition to that a plural resolution printing method (400 x 2400) with a binary weighted correction scheme is used to reduce a binary printhbar''s printing non-uniformity of + or-iS to + or- 1. 0. 1.

Paper Details

Date Published: 1 August 1990
PDF: 12 pages
Proc. SPIE 1254, Optical Hard Copy and Printing Systems, (1 August 1990); doi: 10.1117/12.19859
Show Author Affiliations
Yee S. Ng, Eastman Kodak Co. (United States)
Hieu T. Pham, Eastman Kodak Co. (United States)
Robert Laird, Eastman Kodak Co. (United States)

Published in SPIE Proceedings Vol. 1254:
Optical Hard Copy and Printing Systems
Victor A. Files; David Kessler, Editor(s)

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