Polymer dispersed LCD

J. D. LeGrange, T. M. Miller, P. Wiltzius, et al.. Brightness enhancement of reflective polymer-dispersed LCDs, SID Inti. Symp. Digest Tech. Papers, 26, 275 (1995). 

H. Yoshida, K. Nakamura, H. Tsuda, et al.. Direct-view polymer-dispersed LCD with crossed Nicols and uniaxial film, J. Soc. Inf. Display, 2, 135 (1994). 

Polymer-dispersed LC (PDLC) [30], polymer-stabilized cholesteric texture (PSCT) [31], and LC gels [32] all exhibit optical scattering characteristics and have wide applications in displays and optical devices. The LC gel-based reflective LCD can also be extended to transflective... 

H. J. Comelissen, J. H. M. Neijzen, F. A. M. A. Paulissen, and J. M. Schlangen, Reflective direct-view LCDs using polymer dispersed liquid crystal (PDLC) and dielectric reflectors, Proc. Inti. Display Research Conf. 97, 144 (1997). 

Field-induced reorientation of the director with attendant optical changes has recently been used in a novel application with the potential for large-area LCDs polymer dispersed LCs (PDLCs). A PDLC is a microemulsion of MLC dispersed in a conventional transparent polymer film. In the off state there is a mismatch between the refractive index of the MLC and that of the host polymer film. Hence the dispersion of MLC droplets scatters light very effectively, giving an optically opaque film (Fig. 5.14, left-hand side). On application of an external electric field (across a capacitor-like transparent coating of tin oxide on both sides of the polymer film), the director assumes the same orientation in all of the microdroplets. If the... 

Figure 25 demonstrates the importance of the 2D-LC for separation and molecular characterization of complex polymer system, the block copolymer poly-styrene-block-poly(methyl methacrylate). It is evident that SEC alone could not disclose presence of homopolymers in the block copolymer. On the other hand, LC LCD has well separated both parent homopolymers from the block copolymer within a single step and the online SEC colunm afforded their molar mass averages and dispersities. 

Liquid crystals constitute a distinct thermodynamic state of condensed matter, which combines the fluidity of ordinary liquids with the macroscopic anisotropy of solid crystals. They are quintessential soft matter materials, which are today best known to the broad public for their ubiquitous application as electro-optical material in flat panel liquid aystal displays (LCDs). Systems exhibiting liquid crystalline order range from small rod- or disc-shaped organic molecules (e.g., the classic liquid crystals used in LCD devices), over polymers, biological membranes, dispersions of micelles and nanoparticles to certain quantum electronic materials. 

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