Abstract
Hemispherical diffuse illumination is a common ambient lighting environment. We highlight the unique issues related to measuring the ambient performance of curved displays under hemispherical diffuse illumination, and propose methods to address them. A flexible reflective e‐paper display (EPD) is measured inside an integrating sphere, and comparison made to the sampling sphere method. The EPD is measured not only in its flat state, but also when bent to cylindrical shapes of various radii of curvature.
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