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US 4,027,950 AGranted
Electro-optical display device
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsAkio Moriyama, Masakazu Fukai, Hiroshi Tatsuta, Hiroaki Takahashi, Hiroshi Esaki
Life of this patent
Estimating the term…
Abstract
A non-liquid crystal organic compound having positive dielectric anisotropy is mixed with a nematic liquid crystal composition having negative dielectric anisotropy to obtain a nematic liquid crystal composition having positive dielectric anisotropy, which is used as an electro-optical element. Thus, the present invention aims at development of new use of the materials.
Claims2
An electro-optical display device comprising
- i. two electrode plates, at least one of which is transparent,
- ii. a nematic liquid crystal composition interposed between said plates, wherein said composition has positive dielectric anisotropy and consists essentially of a nematic liquid crystal material with negative dielectric anisotropy and at least one non-liquid crystal compound selected from the group consisting of ##STR7## ##STR8## iii. means for applying an electric field across said composition.
Dependencies are inferred from the claim text.