Abstract: The invention refers to a composition comprising a liquid crystal material and an additive, preferably a dopant capable of forming a complex with said LC material, to a liquid crystal cell comprising this composition, uses thereof and to a method of improving the response time of a liquid crystal.

Abstract: The present invention relates to a transmission apparatus for transmitting OFDM-signals comprising modulation means 4 for modulating said signals onto a plurality of subcarriers using a OFDM-modulation method, transformation means 5 for transforming said modulated signals into the time domain, and transmission means for transmitting said signals, whereby in said modulation means every M-th subcarrier is modulated, wherein M is an integer and M?2. The present invention also relates to a corresponding transmission method for transmitting OFDM-signals.