Abstract: A device for modulating the phase of a light beam includes a matrix of elementary cells, called pixels, coupled to a circuit for addressing the pixels, the device further comprising a set of so-called lateral electrodes extending in a so-called vertical direction (Y) at right angles to the alignment direction (Xa) and configured to apply, for each pixel and via at least two lateral electrodes, a so-called acceleration voltage generating a lateral electrical field (Era) substantially parallel to the alignment direction, in a vector allowing an accelerated return of the liquid crystal molecules to their orientation of rest, the acceleration voltage being configured to be applied in a phase called acceleration relaxation phase, when the activation voltage is no longer applied.

Abstract: The invention relates to a lip or care stick which contains vitamins and which is used for cosmetic applications. The stick contains an outer complex comprised of a cellulose derivative having a particle size ranging from 0.5 to 100 &mgr;m, and is comprised of a phospholipid and of an &agr;-tocopheral ester. The proportion of the complex is equal to 0.5 and 40 wt. %, with regard to the total mass. The stick also contains cosmetically conventional fats, waxes and additive which have a proportion ranging from 99.5 to 60 wt. % &agr;-tocopheral is stabilized with regard to UV-filters, can also be dissolved in the form of the complex by moisture and can be absorbed and processed as a vitamin by the body.