A New Driving Scheme for Reflective Bistable Cholesteric Liquid Crystal Displays

Hybrid anchoring for a color-reflective dual- frequency cholesteric liquid crystal device switched by low voltages

Cholesteric liquid crystal (CLC) materials used in electro-optical (EO) devices are characterized by high operating voltage and slow response speed, which hinders their further development in display applications. Dual-frequency CLCs (DFCLCs) can solve the problem of slow bistable transition, but the operating voltage is still high, especially in color-reflective DFCLC cells. Here we report a s...

Black-white Reflective Liquid Crystal Display Prepared with Two Color Reflective Layers

Reflective cholesteric liquid crystal displays (Ch-LCD) with bistability are very attractive because of their excellent readability, low power consumption with image memory, high reflectivity, high contrast ratio at a wide viewing angle, and a low manufacturing cost[1]. Cholesteric liquid crystal displays have several unique features suitable for mobile displays, public information displays, si...

Transient Dielectric Study of Bistable Reflective Cholesteric Displays and Design of Rapid Drive Scheme

Optimization of reflective bistable twisted nematic displays with retardation compensation

The contrast ratios of reflective bistable twisted nematic liquid crystal displays with a rear quarter-wave film are optimized by means of a parameter space approach. By plotting the contrast ratio as a function of the twist angle and thickness-birefringence product (dDn) of the display, the regions where the displays show the best contrast ratio are clearly shown. Both the absolute reflectance...

Optically optimized transmittive and reflective bistable twisted nematic liquid crystal displays

A new Mueller matrix approach is developed for the design of optical modes for all nematic liquid crystal displays ~LCD!. In particular, for linearly polarized light going into the LC cell, conditions for linear polarization and circular polarization outputs are obtained. By considering the switching between different polarization modes, new transmittive and reflective bistable twisted nematic ...