Liquid crystal alignment agent, display panel and method for manufacturing the same

A display panel, comprising:

• a first substrate;
• a second substrate disposed opposite to the first substrate;
• a liquid crystal layer disposed between the first substrate and the second substrate;
• and
• a liquid crystal alignment film disposed on a side of the first substrate close to the liquid crystal layer and/or a side of the second substrate close to the liquid crystal layer, wherein a material of the liquid crystal alignment film comprises polyimide represented by formula I:
• wherein R1 represents a group obtained after decarboxylation of a tetracarboxylic dianhydride;
• at least one of R2 and R3 is represented by formula II:
• R4, R5, and R6 are independently selected from a single bond, an alkyl group, an alkoxy group, a fluoroalkyl group, or a fluoroalkoxy group, at least two of R4, R5, and R6 are not simultaneously selected from a single bond, and a sum of the number of carbon atoms in R4, the number of carbon atoms in R5, and the number of carbon atoms in R6 is any integer from 2 to 11 at each occurrence;
• n represents a positive integer;
• and
• * represents a linking site.