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Reflective Color Displays for Imaging Applications

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Electronic displays for the rendering of full-color images have to date relied solely on self-luminous display configurations. While self-luminous displays have evolved into effective devices for color imaging, they require relatively large amounts of power and, in general, do not respond naturally to changes in ambient illumination. These attributes place limiting constraints on future applications for self-luminous color displays, particularly in light of current trends toward mobile computing and the proliferation of color in hardcopy document imaging. Clearly, a low-power reflective color display technology is needed to broadly satisfy the needs of both mobile computing and electronic color imaging. Previous approaches to achieve a reflective color display have generally produced unsatisfactory results, typically yielding displays with a restricted set of primary colors and low luminance. In this contribution we determine the visual parameters required for effective, full color reflective displays. We analytically examine a number of contemporary liquid crystal technologies and associated optical configurations which hold promise for achieving reflective color displays. We conclude that reflective displays based on polymer-dispersed liquid crystals (PDLCs) and polymer-stabilized cholesteric texture liquid crystals (PSCT) are the most viable color-capable reflective technologies to date. A new type of PDLC offering highly selective and efficient spectral reflectance via Bragg reflection is described, and we show such materials can be configured as a full-color reflective display and optimized for color imaging applications.
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Document Type: Research Article

Publication date: January 1, 1995

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  • CIC is the premier annual technical gathering for scientists, technologists, and engineers working in the areas of color science and systems, and their application to color imaging. Participants represent disciplines ranging from psychophysics, optical physics, image processing, color science to graphic arts, systems engineering, and hardware and software development. While a broad mix of professional interests is the hallmark of these conferences, the focus is color. CICs traditionally offer two days of short courses followed by three days of technical sessions that include three keynotes, an evening lecture, a vibrant interactive (poster) papers session, and workshops. An endearing symbol of the meeting is the Cactus Award, given each year to the author(s) of the best interactive paper; there are also Best Paper and Best Student Paper awards.

    Please note: for Purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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