Polarizer and manufacturing method thereof, display panel and manufacturing method thereof

A method for manufacturing a display panel, comprising:

• forming a polarizer by;
• providing a flat polarizing product comprising a linear polarizing sheet and a phase difference layer stacked over each other, wherein the linear polarizing sheet comprises an iodine-based polarizing film using polyvinyl alcohol as base material;
• providing an abutment comprising a supporting plane, wherein at least a portion of an edge of the supporting plane is provided with an arcuate chamfer, which arcuate chamfer forms a supporting curved surface;
• fitting the polarizing product onto a side of the supporting plane, so that an orthographic projection of a second edge of the supporting curved surface in a plane where the supporting plane is located goes beyond an edge of the polarizing product, wherein the supporting curved surface comprises a first edge connected with a central portion of the supporting plane and the second edge opposite to the first edge;
• and
• applying a moist and heated gas to the edge of the polarizing product so as to fit the edge of the polarizing product onto a side of the supporting curved surface;
• after applying the moist and heated gas to the edge of the polarizing product so as to form the polarizer, fitting the glass cover plate onto a side of the polarizer away from the abutment;
• and
• fitting a combined structure, which combined structure is formed by fitting the polarizer and the glass cover plate, onto the flexible array substrate, wherein the glass cover plate is located on a side of the polarizer away from the flexible array substrate.