| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a liquid crystal compound having a biaxial liquid crystal phase, especially expressing a biaxial nematic liquid crystal phase and/or having a specific structure, and a liquid crystal composition containing the same, and a retardation plate using the composition. <P>SOLUTION: The invention relates to the liquid crystal compound expressing a nematic phase and satisfying following mathematical formula (1) and having a part with an aromatic heterocyclic ring bound with an aromatic hydrocarbon ring, and/or a liquid crystal compound expressing a nematic phase and satisfying following mathematical formula (2) and represented by general formula (3). Mathematical formula (1); 1.1≤(nx-nz)/(nx-ny)≤20, mathematical formula (2); 1.0≤(nx-nz)/(nx-ny)≤20, in the mathematical formula (1) and (2), the nx, ny and nz represent orthogonal refractive indexes in three direction of the nematic liquid crystal phase and nx is the largest refractive index and nz is the smallest refractive index. [In general formula (3), L is a cyclohexyl or metaphenylene. R<SB>1</SB>-R<SB>4</SB>are each a substituent. j and k are each independently an integer of 0-4]. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
