Multilayer guest host liquid crystal display without polarizers

Details Multilayer guest host liquid crystal display without polarizers Multilayer guest host liquid crystal display without polarizers

1983-01-03

1985-12-03

Corbin, John K.

G02F 1133

Patent

active

045562865

ABSTRACT:
A guest-host type liquid crystal display device not requiring the use of external polarizers, comprises: at least two guest-host type liquid crystal cells which are superimposed one upon another, two of which are constructed in a manner that the liquid crystal molecules contained in these two cells and located close to the boundary between the two cells are aligned in a direction parallel to the plane of the boundary, but that the direction of alignment of the molecules in one of these two cells is perpendicular to that in the other cell when a voltage is applied to both cells, or alternatively when no voltage is applied to both cells, or alternatively when a voltage is applied to only one of these two cells. In case the perpendicular state is realized when a voltage is applied to both cells, the molecules are caused to be rearranged in a direction normal to the substrate by the removal of the applied voltage, whereas in case said state is realized when no voltage is applied to both cells, such rearrangement can be achieved by the application of a voltage. The liquid crystal material to be used in the cells is selected from nematic liquid crystal material having a positive dielectric anisotropy and a material having a negative dielectric anisotropy.

REFERENCES:
patent: 4097130 (1979-06-01), Cole et al.
patent: 4266859 (1981-05-01), Togashi
patent: 4396250 (1983-08-01), Wada et al.

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