1 August 1990 Nonuniformity correction in LED printing with plural resolution recording
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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.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yee S. Ng, Yee S. Ng, Hieu T. Pham, Hieu T. Pham, Robert Laird, Robert Laird, "Nonuniformity correction in LED printing with plural resolution recording", Proc. SPIE 1254, Optical Hard Copy and Printing Systems, (1 August 1990); doi: 10.1117/12.19859; https://doi.org/10.1117/12.19859

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