| 摘要 |
A liquid crystal display device comprises two electro-optic 90 DEG twist cells in tandem, between polarisers and with no interposed light affecting elements, the alignments in the upper cell U and lower cell L being one of the combinations 20-23, where the solid and dashed arrows respectively relate to the upper and lower surfaces of the liquid crystal layers, whereby the display exhibits maximum contrast when viewed from between the 4.30 and 7.30 directions. Both layers exhibit the same degree of contrast in the 6 o'clock direction, have the same twist sense and may be of the same material. When both layers are in the twisted state the polariser through which light is transmitted to cell U is arranged to provide a linear polarisation always at 90 DEG to the long liquid crystal axis, to reduce light absorption. The two layers may be arranged to display different types of information. <IMAGE>
|
