Display module and method for manufacturing the same, and display apparatus

A method for manufacturing a display module, comprising:

• providing a display panel;
• the display panel having a display area, the display area including a main display area and a sub display area;
• forming a first color filter layer at a light exit side of the display panel;
• the first color filter layer being located in the main display area, and the first color filter layer including a plurality of first color filter portions;
• and
• forming a polarizing layer at the light exit side of the display panel;
• the polarizing layer being located in the sub display area, and the polarizing layer being configured to change a polarization direction of at least part of external light entering an inside of the display panel, so as to prevent the at least part of the external light entering the inside of the display panel from exiting from the light exit side of the display panel.