Multiple color high resolution reflective cholesteric liquid crystal displays

Abstract

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.

Review Paper: A critical review of the present and future prospects for electronic paper

“…Full-color operation is typically achieved by stacking red, green, and blue panels, and individually switching each layer. 112 The achievable color gamut depends on the quality of the liquid-crystal alignment, on the display illumination conditions, and the effect of specular reflections off the multiple interfaces in the display stack. The quality of green and blue colors can be reasonably good, but the physics of liquid crystals often results in a desaturated red.…”

Liquid Crystal Display Matrices, Drive Schemes and Bistable Displays

“…The displays have three alternating types of stripes of Ch liquid crystals with three different pitches reflecting blue, green and red light. Multiple color displays from multiple layers are made by stacking three layers of cholesteric liquid crystals with pitches reflecting blue, green, and red light [65][66][67][68]. Polymer walls, especially field-induced polymer walls, are good candidates.…”

Review of operating principle and performance of polarizer‐free reflective liquid‐crystal displays

“…49 Full-color ChLCDs are made from a stack of three cholesteric layers reflecting blue, green and red light, respectively. [50][51][52][53] A ChLCD can be encapsulated to make reflective displays with plastic substrates. [54][55][56][57][58][59] The cholesteric droplets can be prepared by using emulsion or polymer dispersion methods.…”