Legibility under reading lights using white LED
M. Yamagishi, F. Kawasaki, K. Yamaba, M. Nagata
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AbstractThis paper deals with legibility under in-vehicle reading lights. In this study, five light sources (incandescent lamp, fluorescent lamp, bicolor LED and two types of white LED) were used in order to evaluate legibility, perceptual whiteness and perceptual brightness. The il-luminance of the text paper was set constant at 40 lx. The first experiment showed that there is a relationship between legibility and perceptual whiteness. The second experiment - a comparison between four kinds of light sources without the bicolor LED as to subjects' preferences - showed that the whitest LED is the best light source for elderly people. A third experiment confirmed this result as to direct subjective preferences.Keywords: legibility; LED; in-vehicle reading; visual characteristics; elderly
M. Yamagishi, F. Kawasaki, K. Yamaba, M. Nagata (2006). Legibility under reading lights using white LED. Gerontechnology, 5(4), 231-236
https://doi.org/10.4017/gt.2006.05.04.005.00