Optimal front light design for reflective displays under different ambient illumination

Sheng-Po Wang; Ting-Ting Chang; Chien-Ju Li; Yi-Ho Bai; Kuo-Jui Hu

doi:10.1117/12.876655

24 January 2011 Optimal front light design for reflective displays under different ambient illumination

Sheng-Po Wang, Ting-Ting Chang, Chien-Ju Li, Yi-Ho Bai, Kuo-Jui Hu

Proceedings Volume 7867, Image Quality and System Performance VIII; 786715 (2011) https://doi.org/10.1117/12.876655
Event: IS&T/SPIE Electronic Imaging, 2011, San Francisco Airport, California, United States

Abstract

The goal of this study is to find out the optimal luminance and color temperature of front light for reflective displays in different ambient illumination by conducting series of psychophysical experiments. A color and brightness tunable front light device with ten LED units was built and been calibrated to present 256 luminance levels and 13 different color temperature at fixed luminance of 200 cd/m². The experiment results revealed the best luminance and color temperature settings for human observers under different ambient illuminant, which could also assist the e-paper manufacturers to design front light device, and present the best image quality on reflective displays. Furthermore, a similar experiment procedure was conducted by utilizing new flexible e-signage display developed by ITRI and an optimal front light device for the new display panel has been designed and utilized.

Citation Download Citation

Sheng-Po Wang, Ting-Ting Chang, Chien-Ju Li, Yi-Ho Bai, and Kuo-Jui Hu "Optimal front light design for reflective displays under different ambient illumination", Proc. SPIE 7867, Image Quality and System Performance VIII, 786715 (24 January 2011); https://doi.org/10.1117/12.876655

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