Patent ID: 6104368
Filing Date: 2000-08-15
Classification: G09G

Abstract:
A diffractive liquid crystal device comprising:a layer of bistable liquid crystal;a plurality of strobe electrodes;a plurality of pairs of data electrodes;a plurality of picture elements, each of which is formed at an intersection of a respective one of the strobe electrodes and a respective one of the pairs of data electrodes, the data electrodes of each pair being interdigitated at each picture element;a strobe signal generator for supplying strobe signals to the strobe electrodes such that each strobe electrode receives strobe signals of alternate polarity in consecutive frames of a first time period; anda data signal generator for supplying first and second data signals to first and second ones of the data electrodes, respectively, of each pair in synchronism with each strobe signal,wherein the strobe signals do not include blanking signals between the frames of the first time period, andwherein the first and second data signals comprise, during the first time period: switching signals for selecting a non-diffractive picture element state; a switching signal and a non-switching signal, respectively, in odd frames for selecting a diffractive picture element state; and a non-switching signal and a switching signal, respectively, in even frames for selecting a diffractive picture element state.