Flexible and reflective polarizer-free liquid crystal displays using dye-doped liquid crystal gels

摘要

A flexible and reflective polarizer-free display using dye-doped liquid crystal (LC) gels is demonstrated. The electro-optical performances of both scattering and absorption based dye-doped LC gels depend on curing temperatures. The dye-doped LC gel shows good reflectance～55%, good contrast ratio～450:1 and fast response～6.5ms at curing temperature 10 ℃ when UV curing intensity is 2.6 mW/cm～2. The EO performance depends on the curing temperature. The hysteresis is independent of sampling time duration. The bending curvature is 21 mm. The response of dye-doped LC gels is faster under bending due to the bending-induced sheared force of polymer networks. The dye-doped LC gels open a new window for trim-able electronic papers, decorative displays and switchable curtains.