| 摘要 |
In order to provide a liquid crystal display device having enhanced contrast, pleochroic and fluorescent materials are incorporated in one or more components of the device. The materials are incorporated in balanced proportion and have absorbtion and emission spectra, respectively, that are complementary. Light incident on the display is thus converted so that light reaching the eye from the bright state regions of the display is neutral grey in contrast to the light from the dark state regions, which is strongly attenuated and may be strongly colored. In particular the pleochroic material may be the dye: <IMAGE> and the fluorescent material, the dye: <IMAGE> alone or in balanced combination with the dye: <IMAGE>
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