Display modules, methods of manufacturing a display module, and spliced display devices

A method of manufacturing a display module, comprising:

• providing a main display panel and a secondary display panel, the main display panel having a light-emitting side, and comprising a display part and a non-display part, the secondary display panel being disposed on the light-emitting side of the main display panel and corresponding to the non-display part;
• and
• forming a polarization film on a side of the secondary display panel away from the main display panel;
• and
• wherein the polarization film comprises a first protection layer, a privacy protection function layer, a polarization function layer, and a second protection layer successively stacked in a direction away from the main display panel, and an orthographic projection of the privacy protection function layer on the main display panel overlaps the display part and the secondary display panel.

A spliced display device, comprising:

• a housing, having an accommodating space;
• and
• a plurality of display modules, arranged in an array in the accommodating space, any two adjacent ones of the display modules being in contact with each other;
• and
• wherein each of the display modules comprises:
• a main display panel, having a light-emitting side, and comprising a display part and a non-display part;
• a secondary display panel, disposed on the light-emitting side of the main display panel, and corresponding to the non-display part;
• and
• a privacy protection function layer, disposed on a side of the secondary display panel away from the main display panel;
• and
• wherein an orthographic projection of the privacy protection function layer on the main display panel overlaps the display part and the secondary display panel.