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Proceedings Paper

Color calibration of liquid crystal displays
Author(s): Albert N. Cazes; Gordon W. Braudaway; James Christensen; Michael Cordes; Don DeCain; Shui-Chih A. Lien; Frederick C. Mintzer; Steven L. Wright
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Paper Abstract

For more than a decade the Image Applications department at IBMs Watson Research Center has been involved in cultural and commercial imaging projects that demand high-fidelity color reproduction of precious objects like paintings, illuminated manuscripts or jewelry. Our primary display media have been high-resolution cathode ray tubes (CRT), but for the last three years our customers have been replacing them with liquid crystal displays (LCD). The color calibration model we have been using for the CRT is the one described in the literature. It assumes that the chromas of the primaries are independent of intensity, that the colors produced from them are additive and that the intensity of black is almost zero. We measured several models of LCDs and observed that they poorly satisfied these assumptions at medium to low intensities. This becomes noticeable if the image has dark areas or if the display is viewed under a weak ambient light. In this paper, we use a modified version of the CRT model to calibrate the LCD. First we measure four sets of red, green, blue and gray patches. THen we determine the correction factor needed to make, at each level,the sum of the primaries equal to the corresponding gray. Finally, we use these factors to modify the data of red, green and blue.

Paper Details

Date Published: 12 April 1999
PDF: 8 pages
Proc. SPIE 3636, Flat Panel Display Technology and Display Metrology, (12 April 1999); doi: 10.1117/12.344642
Show Author Affiliations
Albert N. Cazes, IBM Thomas J. Watson Research Ctr. (United States)
Gordon W. Braudaway, IBM Thomas J. Watson Research Ctr. (United States)
James Christensen, IBM Thomas J. Watson Research Ctr. (United States)
Michael Cordes, IBM Thomas J. Watson Research Ctr. (United States)
Don DeCain, IBM Thomas J. Watson Research Ctr. (United States)
Shui-Chih A. Lien, IBM Thomas J. Watson Research Ctr. (United States)
Frederick C. Mintzer, IBM Thomas J. Watson Research Ctr. (United States)
Steven L. Wright, IBM Thomas J. Watson Research Ctr. (United States)


Published in SPIE Proceedings Vol. 3636:
Flat Panel Display Technology and Display Metrology
Bruce Gnade; Edward F. Kelley, Editor(s)

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