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Proceedings Paper

A novel display metrology method for LED backlight system
Author(s): Jee-Gong Chang; Lun-De Liao; Chi-Chuan Hwang
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Paper Abstract

This study develops a statistical prediction model for backlight systems based on a semi-analytical and experimental approach. The prediction model features an iteration algorithm which uses experimental measurements of the luminance, luminance cone angle and luminous efficiency to generate highly accurate luminance predictions. The prediction model allows the effects of manufacturing errors or uncertainties which cause a deviation of the luminance cone angle or an uneven luminance uniformity to be accessed. The results show that achieving an even luminance cone angle, i.e. a smaller mean and standard deviation of the luminance cone angle, is essential if the backlight luminance level required to achieve a high-brightness backlight is to be enhanced. It is shown that improving the luminance uniformity of the backlight is beneficial in increasing the luminance level. However, the influence of the backlight luminance uniformity is not as great as that of the luminance cone angle. Finally, a comparison between the analytical and experimental results shows that a good agreement exists between the results of the proposed statistical model and the experimental data.

Paper Details

Date Published: 18 September 2006
PDF: 18 pages
Proc. SPIE 6338, Nonimaging Optics and Efficient Illumination Systems III, 63380I (18 September 2006); doi: 10.1117/12.678031
Show Author Affiliations
Jee-Gong Chang, National Ctr. for High-Performance Computing (Taiwan)
Lun-De Liao, National Cheng Kung Univ. (Taiwan)
Chi-Chuan Hwang, National Cheng Kung Univ. (Taiwan)


Published in SPIE Proceedings Vol. 6338:
Nonimaging Optics and Efficient Illumination Systems III
Roland Winston; Pablo Benítez, Editor(s)

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