摘要 |
A liquid crystalline medium comprises a plurality of polymerizable monomers and a plurality of liquid crystal molecules. The liquid crystal molecules are selected from at least one of compounds 1, 2, 3, 4, 5, and 6. "G<SUP>1</SUP>", "G<SUP>3</SUP>" and "G<SUP>5</SUP>" are independently alkyl having 1 to 8 carbons or alkyenyl having 2 to 8 carbons. "G<SUP>2</SUP>" and "G<SUP>6</SUP>" are independently alkyl having 1 to 8 carbons or alkoxy having 1 to 7 carbons. "G<SUP>4</SUP>" is alkyl of 1 to 8 carbons, alkyenyl of 2 to 8 carbons or alkoxy of 1 to 7 carbons. "Z<SUP>1</SUP>" is single bond, ethyl or methoxy. "Z<SUP>2</SUP>" is single bond, ethyl, methoxy, or caroboxyl. "Z<SUP>3</SUP>" is single bond, ethyl, difluoromethoxy, difluoropropoxy or ethyl carboxyl. "Z<SUP>4</SUP>" is single bond, ethyl, difluoromethoxy, or difluoropropoxy. are independently 1,4-cyclohexylene or 1,4-phenylene. One of "E<SUP>1</SUP>" and "E<SUP>2</SUP>" is fluorine, and the other is chlorine.
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