High Contrast and Fast Response Polarization- Independent Reflective Display Using a Dye-Doped Dual-Frequency Liquid Crystal Gel
نویسندگان
چکیده
We have developed a new guest-host reflective display using a dye-doped dualfrequency liquid crystal (DFLC) gel. By combining dye absorption and maximal light scattering, the display is polarization independent and exhibits a high contrast ( 230:1). The high reflectivity (R 50%) is because of the vertical aligned structure at 0 Vrms. The fast response time ( 5 ms) is also fast due to the frequency modulation. A black and white segmented-alphabet reflective display prototype is also demonstrated.
منابع مشابه
High contrast polymer-dispersed liquid crystal in a 90° twisted cell
A polymer-dispersed liquid crystal confined in a 90° 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 d...
متن کاملAnisotropic liquid crystal gels for switchable polarizers and displays
An anisotropic liquid crystal gel with low operating voltage, high contrast ratio, broad bandwidth, wide viewing angle, and fast response time was demonstrated. In the voltage-off state, the gel is highly transparent. When the gel is activated by an electric field, light scattering occurs for the polarization along the molecular axis. By incorporating a l/4 film between the gel and a reflector,...
متن کاملA polarizer-free flexible and reflective electrooptical switch using dye-doped liquid crystal gels.
A polarizer-free flexible and reflective electro-optical switch 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 due to domain sizes of polymer networks. Such flexible electro-optical switch is bendable and trim-able because of the vertical polymer networks and gel-l...
متن کاملDual-frequency liquid crystal gels with submillisecond response time
Two types of gels using dual-frequency liquid crystal are demonstrated. The one using a homogeneous cell shows anisotropic scattering behavior while the other prepared using a cell without polyimide alignment layers exhibits isotropic scattering properties. Both liquid crystal gels are highly transparent in the voltage-off state. Light scattering occurs when a high frequency voltage is applied....
متن کاملA Polarizer-free Liquid Crystal Display using Dye-doped Liquid Crystal Gels
Liquid crystal (LC) based photonic devices are important in light modulated applications including amplitude modulation and phase modulation. [Yang et al. (2006)] The anisotropic properties of LC result in employing two polarizers in most of LC devices. The optical efficiency (~3%) and the viewing angle are limited. Therefore, it is highly desirable to develop polarizer-free LC devices. [Yang e...
متن کامل