Cholesteric liquid crystal

Because of the reflective nature of the ChLCD, these displays can be perfectly read under sunlight conditions.

Examples of compounds known to form cholesteric phases are hydroxypropyl cellulose and cholesteryl benzoate.

A US company, Kent Displays, has developed "no power" Liquid Crystal Displays using Polymer Stabilized Cholesteric Liquid Crystals: these are known as ChLCD screens.

[1] A drawback of ChLCD screens is their slow refresh rate, especially at low temperatures.

ITRI The German company BMG MIS (formerly AEG MIS) has developed “Geameleon[6]”- ChLCDs full color and monochrome in various sizes and resolutions.

The image shows a rotation of the director about 180° in a cholesteric phase. The corresponding distance is the half-pitch, p/2.
The image shows a rotation of the director about 180° in a cholesteric phase. The corresponding distance is the half-pitch, p/2.