Multicolor fluorescent liquid-crystal display concepts

Abstract

A cholesteric liquid-crystal electro-optic cell is described which functions as both a UV shutter and as a tunable fluorescent emitter (’’shutter cell’’). By interfacing such a cell with an external passive fluorescent element, a two-color display can be achieved. Contrast ratios of about 5 in the two-color pairs blue-green, blue-red, and green-red are achievable by electrically switching the shutter cell. Multicolor displays can be made by stacking shutter cells and passive elements.