| 摘要 |
2112969 9323788 PCTABS00028 A reflective liquid crystal display device (1) comprises a ferroelectric liquid crystal cell (7), a first polariser (13) through which light (19) from a light source passes before passing through the cell, a second polariser (15) through which the light passes after passing through the cell, and a reflective layer (17) which reflects the light back through the second polariser, the cell and the first polariser, in that order, for viewing by an observer (21). In order to obtain a bright image, the first and second polarisers are orientated with their directions of polarisation at angles of .alpha. and .beta., respectively, relative to the alignment direction (27), the value of .alpha.+.beta. being determined from formula (I) where the optic axes in the two switching states of the liquid crystal material are at angles of +.THETA.c, and -.THETA.c, respectively, to the alignment direction.
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