| 摘要 |
A cholesteric liquid crystal compound having the following general formula (I), and a polymric cholesteric liquid crystal compound formd by polymerization thereof and a polymer dispersed liquid crystal display device having an improved contrast and driving voltage which is prepared by coating surfaces of two glass substrate plates with the above liquid crystal or the polymer liqui crystal formed by polymerization thereof in a thickness of 50-1000 ANGSTROM , injecting a conventional nematic liquid crystal and a polymer gel precursor into a space formed between the two glass plates and subjecting them to the polymerization under ultraviolet light radiation are disclosed. <IMAGE> (I) wherein Y represents hydrogen, a hydrocarbon radical having one or more carbon atoms, and optionally containing one or more hetero atoms selected from the group consisting of oxygen, sulfur and nitrogen, X represents a halogen atom, and n denotes an integer of one or more. |
