Liquid crystal display device, method of manufacturing the same and alignment layer composition for the liquid crystal display device

A method of manufacturing an LCD device, the method comprising:

• forming a lower alignment layer on an array substrate comprising a pixel electrode having a plurality of slit portions inducing an alignment direction of liquid crystal molecules;
• coupling an opposite substrate to the array substrate;
• providing a liquid crystal layer between the lower alignment layer and the array substrate;
• and
• irradiating the lower alignment layer with light under conditions in which an electric field is applied to the liquid crystal layer through the pixel electrode to provide a pretilt angle to liquid crystal molecules at a surface of the lower alignment layer,
• wherein the lower alignment layer includes a polyimide including a reactive mesogen (RM) side chain chemically bonded to a backbone of the polyimide, wherein the polyimide is formed from an alignment layer composition including a reactive mesogen (RM) diamine,
• wherein the reactive mesogen (RM) diamine includes a compound represented by