Abstract— A high‐resolution multiple‐color and black‐on‐white surface‐stabilized reflective cholesteric liquid‐crystal display with reflectivities as high as 40% is reported. The double‐stacked 1/8‐VGA, 100‐dpi prototype shows four vivid colors with negligible parallax. The potential for eight colors and ultimately full color is demonstrated in a high‐resolution triple‐stacked prototype.

We report a unique eight color and black on white surface stabilized

We report a full color '/ VGAreflective cholesteric display with 4096 colors. The display can deliver a brightness approaching 40% reflected luminance, far exceeding all other reflective technologies. With its zero voltage bistability, images can be stored for days and months without any power consumption. This property can significantly extend the battery life. The capability of displaying full color complex graphics and images is a must in order to establish a market position in this multimedia age. Color is achieved by stacking RGB cells. The top layer is blue with right chirality, the middle layer is green with left chirality, and the bottom layer is red with right chirality. The choice of opposite chirality prevents the loss in the green and red spectra from the blue layer on the top. We also adjusted the thickness of each layer to achieve color balance. We implement gray scale in each layer with pulse width modulation. This modulation method is the best choice in consideration of lower driver cost, simpler structure with fewer cross talk problems. Various drive schemes and modulation methods will be discussed in the conference.

We report a unique eight color and black on white surface stabilized

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