High contrast polymer-dispersed liquid crystal in a 90° twisted cell

A polymer-dispersed liquid crystal confined in a 90degrees twisted cell (T-PDLC) is demonstrated. In comparison to a conventional PDLC, the T-PDLC is also polarization independent while exhibiting a higher contrast ratio. Potential applications of the T-PDLC are in polarizer-free reflective display and light switch. A black and white segmented-alphabet reflective display using a dye-doped T-PDLC is demonstrated. (C) 2004 American Institute of Physics.