NEW COPOLYIMIDE, LIQUID CRYSTAL ALIGNING LAYER COMPRISING THE SAME, AND LIQUID CRYSTAL DISPLAY COMPRISING THE SAME

摘要

A polyimide copolymer is provided to form a liquid crystal aligning layer that has excellent heat stability, does not form any afterimage, and shows good liquid crystal aligning property. A polyimide copolymer comprises a repeating unit represented by the following formula 1, wherein m is from more than 0 mol% to less than 100 mol%, n is from less than 100 mol% to more than 0 mol%, R1 and R2 are tetrafunctional organic groups different from each other, W1 and W2 are identical to or different from each other, and each of W1 and W2 is selected from the group comprising the following formulae.