Polarizing device and method for manufacturing polarizing device, display panel, and display device

A method for manufacturing a polarizing device, comprising:

• attaching respective at least one second polarizing layer onto each of two sides of the first polarizing layer, to enable an orthographic projection of a light transmission axis of the first polarizing layer onto the first polarizing layer to intersect with an orthographic projection of a phase delay axis of the second polarizing layer onto the first polarizing layer to form an included angle;
• the light transmission axis being parallel to the first polarizing layer, the phase delay axis being parallel to the second polarizing layer, the included angle being configured to convert linear polarized light incident on a polarizing component into polarized light to be emitted from the polarization assembly, a cross section of the polarized light being of a closed curve pattern, and the cross section being perpendicular to an light-emitting direction of the polarized light,
• wherein a substrate is stretched in any direction parallel to the substrate, to enable a phase delay of the substrate to be in a range of being not less than 6000 nm and being no more than 10000 nm to obtain the second polarizing layer.