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Proceedings Paper

A new bi-primary color system for doubling the reflectance and colorfulness of e-paper
Author(s): Jason Heikenfeld
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Paper Abstract

There are several paradigms for color generation in reflective displays (e-Paper) including RGBW color filtering or stacked RGB or CMY. Theoretically, the highest white state reflectance and best color gamut are achieved by stacking three layers of pixels. However, stacking 3 layers induces significant optical losses especially at high resolution and typically does not allow for video operation. Therefore RGBW color filtering is currently preferred for higher resolution and single-layer e-Paper, but only provides color at 25% of the area and a maximum theoretical white reflectance of 50%. Presented herein is a new bi-primary color-system that cooperatively displays two complimentary colors inside a single sub-pixel, and therefore doubles the white state reflectance and color gamut for single-layer e-Paper. Also discussed are candidate e-Paper technologies that may be able to adopt the bi-primary color system, including possible advantages and challenges for each technology.

Paper Details

Date Published: 3 February 2011
PDF: 6 pages
Proc. SPIE 7956, Advances in Display Technologies; and E-papers and Flexible Displays, 795608 (3 February 2011); doi: 10.1117/12.874294
Show Author Affiliations
Jason Heikenfeld, Univ. of Cincinnati (United States)

Published in SPIE Proceedings Vol. 7956:
Advances in Display Technologies; and E-papers and Flexible Displays
Karlheinz Blankenbach; Liang-Chy Chien; Sin-Doo Lee; Ming Hsien Wu, Editor(s)

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