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AssigneeHitachi, Ltd.
InventorsAkio Mukoh, Fumio Nakano, Hideaki Kawakami, Hirosada Morishita, Mikio Sato, Hidetoshi Abe, Shuji Imazeki
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A pleochroic color display device is provided which comprises a layer of guest-host type liquid crystal sandwiched between two transparent electrodes for driving the liquid crystal, the guest-host liquid crystal containing a dichroic dye as guest material, and a color filter disposed in front or rear of the layer of the guest-host type liquid crystal. High contrast pleochroic color displays can be obtained by selecting a blackish dye as the dichroic dye. Dichroic displays other than white ones can be produced by the use of a single liquid crystal cell and a single color filter (with one color).
A transmission-type liquid crystal device for pleochroic color display, adapted to have a light source disposed at the side of said device opposite to the display side of said device, comprising a layer of liquid crystal containing a blackish dichroic dye, said layer being sandwiched between a pair of substrates each having thereon a transparent electrode adjacent to said layer for driving said liquid crystal in response to an external signal and a color filter disposed adjacent to said layer, wherein said color filter is composed of a plurality of color segments and said electrode is composed of a plurality of electrode segments, wherein said color segments and electrode segments are formed correspondingly, whereby a pleochroic color display having a high contrast can be obtained.
A transmission-type liquid crystal device, adapted to have a light source disposed at the side of the device opposite to the display side of the device, comprising:
Dependencies are inferred from the claim text.