| 摘要 |
The present invention relates to a photoalignment layer, for example, a liquid crystal alignment layer, which is able to realize the wide viewing angle and contrast ratio characteristics of a photopolymerizable alignment layer, and to facilitate interaction with the liquid crystal layer, thereby improving alignment stability and reducing image sticking, and a liquid crystal cell including the same. The liquid crystal alignment layer includes a photo-alignment layer including a photo-alignment polymer having at least partially photo-aligned photoreactive groups; and a mesogen layer including a cured product of a reactive mesogen that is liquid crystal-aligned by the photo-aligned photoreactive group, in which the photo-alignment polymer include a norbornene-based polymer having a particular structure. |
| 主权项 |
1. A liquid crystal alignment layer, comprising
a photo-alignment layer including a photo-alignment polymer having at least partially photo-aligned photoreactive group; and a mesogen layer including a cured product of a reactive mesogen that is liquid crystal-aligned by the photo-aligned photoreactive group, wherein the photo-alignment polymer includes a norbornene-based polymer having a repeating unit of the following Chemical Formula 3a or 3b: wherein each independently, q is an integer of 0 to 4, r is an integer of 1 to 4, and m is 50 to 5000, and one or more of R1, R2, R3, and R4 are a radical of the following Chemical Formula 1a, R1 to R4 other than those being the radical of Chemical Formula 1a are the same as or different from each other, and each independently selected from the group consisting of hydrogen; halogen; substituted or unsubstituted, linear or branched alkyl having 1 to 20 carbon atoms; substituted or unsubstituted, linear or branched alkenyl having 2 to 20 carbon atoms; substituted or unsubstituted, linear or branched alkynyl having 2 to 20 carbon atoms; substituted or unsubstituted cycloalkyl having 3 to 12 carbon atoms; substituted or unsubstituted aryl having 6 to 40 carbon atoms; and a polar functional group containing one or more selected from oxygen, nitrogen, phosphorous, sulfur, silicon and boron, if R1 to R4 are not hydrogen; halogen; or a polar functional group, one or more combinations selected from the group consisting of R1 and R2, and R3 and R4 are optionally linked to each other to form an alkylidene group having 1 to 10 carbon atoms, or R1 or R2 is optionally linked to any one of R3 and R4 to form a saturated or unsaturated aliphatic ring having 4 to 12 carbon atoms or an aromatic ring having 6 to 24 carbon atoms, wherein A is a simple bond, oxygen, sulfur, or —NH—, B is selected from the group consisting of a simple bond, substituted or unsubstituted alkylene having 1 to 20 carbon atoms, carbonyl, carboxyl, ester, substituted or unsubstituted arylene having 6 to 40 carbon atoms, and substituted or unsubstituted heteroarylene having 6 to 40 carbon atoms, R9 is selected from the group consisting of a simple bond, substituted or unsubstituted alkylene having 1 to 20 carbon atoms, substituted or unsubstituted alkenylene having 2 to 20 carbon atoms, substituted or unsubstituted cycloalkylene having 3 to 12 carbon atoms, substituted or unsubstituted arylene having 6 to 40 carbon atoms, substituted or unsubstituted aralkylene having 7 to 15 carbon atoms, and substituted or unsubstituted alkynylene having 2 to 20 carbon atoms, and R10 to R14 are the same as or different from each other, and each independently selected from the group consisting of hydrogen, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted aryl having 6 to 40 carbon atoms, substituted or unsubstituted alkoxyaryl having 6 to 40 carbon atoms, and hetero aryl having 6 to 40 carbon atoms containing a hetero element of Group 14, 15 or 16. |
