No abstract

Electro-optical switching of the liquid crystalline Blue Phase exhibits extremely fast response times. However, the unstabilized Blue Phase is characterized by a rather narrow temperature range on the order of a few K. For display applications the operating temperature range needs to be increased. One very promising way is to broaden the stable temperature range by polymer-stabilization of the Blue Phase. Successful stabilization is achieved by proper material selection/matching of reactive mesogens (RMs) and the chiral host. One prerequisite for application in display manufacturing is excellent UV and heat stability as well as good processability. Improvements in relevant performance parameters will be presented and discussed. Fig. 1 Principal constituents of a Blue Phase (BP) mixture include the nematic host mixture, chiral dopant and monomers. 4.4 / M. Wittek SID 2012 DIGEST • 25 ISSN 0097-966X/12/4301-0025-$1.00

Abstract— LCD TVs have dramatically improved in performance during the last 2 years. At the same time, the sale prices decreased by more than 50%. Together with the introduction of digital terrestrial broadcasting, this resulted in increasing sales of LCD TVs. This paper gives an overview of the main liquid‐crystal display (LCD) technologies used for TVs. We discuss key materials, synthesis, structural property relationships, and the optimization of LC mixture properties. For all technologies, we have achieved fast‐switching LC mixtures (16 msec). Novel materials for LC mixtures for the next generation of superior performance LCD TVs with 8‐msec switching times are shown.

Three new structurally similar compounds in series 1[2] and 2 containing 12-and 10-vertex p-carborane units (A and B) were prepared. Their thermal properties were investigated in the pure state and compared to those of their carbocyclic analogues. Using several higher homologues in the series 1[n], clearing temperatures for the unknown 1[4] and 1[10] were predicted. Optical, dielectric and rotational viscosity parameters for carborane derivatives 1[2] and 2 and their cyclohexane analogies were obtained by extrapolation of values measured for 10% solutions in a standard nematic host. The observed trends were rationalised using computed molecular parameters.

No abstract