| 摘要 |
The invention relates to a liquid-crystalline medium which contains at least two polymerisable compounds or reactive mesogens (RM);and
at least one compound selected from the group of compounds of the formula IIA, IIB and IIC,
;;in which
R2A, R2B, R2C, L1-6, ring B, Z2, Z2, p, q and v have the meanings indicated in Claim 1,
and to the use thereof for an active-matrix display, in particular based on the VA, PSA, PS-VA, PALC, FFS, PS-FFS, IPS or PS-IPS effect, especially for the use in LC displays of the PS (polymer stabilised) or PSA (polymer sustained alignment) type. |
| 主权项 |
1. Liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy, characterised in that it contains
at least two polymerisable compounds or reactive mesogens (RM) and at least one compound selected from the group of compounds of the formula IIA, IIB and IIC,in which
R2A, R2B and R2C each, independently of one another, denote H, an alkyl or alkenyl radical having up to 15 C atoms which is unsubstituted, monosubstituted by CN or CF3 or at least monosubstituted by halogen, where, in addition, one or more CH2 groups in these radicals may be replaced by —O—, —S—,—C≡C—, —CF2O—, —OCF2—, —OC—O— or —O—CO— in such a way that O atoms are not linked directly to one another,denotes Y1-6 each, independently of one another, denote H or F. L1 and L2 each, independently of one another, denote F, Cl, CF3 or CHF2, L3-6 each, independently of one another, denote H, F, Cl, CF3 or CHF2, but at least two of L3-6 denote F, Cl, CF3 or CHF2 Z2 and Z2′ each, independently of one another, denote a single bond, —CH2CH2—, —CH═CH—, —C≡C—, —CF2O—, —OCF2—, —CH2O—, —OCH2—, —COO—, —OCO—, —C2F4—, —CF═CF—, —CH═CHCH2O—, p denotes 1 or 2, and, in the case where Z2=single bond, p may also denote 0, q denotes 0 or 1, (O)CvH2v+1 denotes OCvH2v+1 or CvH2v+1, and v denotes 1 to 6. |
