Display substrate, manufacturing method thereof, display panel, and display device

A manufacturing method of a display substrate, comprising:

• forming a plurality of pixels arranged in an array along a first direction and a second direction which are intersected with each other on a base substrate, wherein the plurality of pixels comprise a plurality of first display regions and a plurality of second display regions which are alternately arranged along the first direction, the plurality of first display regions and the plurality of the second display regions each comprises at least one pixel column arranged along the second direction;
• disposing a parallax barrier on a light emitting side of the pixels, wherein the parallax barrier comprises a plurality of light shielding portions and a plurality of light transmitting portions which are alternately arranged along the first direction, each of the light transmitting portions is opposite to a pair of the first display region and the second display region adjacent to each other, the light shielding portions and the light transmitting portions each extends along the second direction, wherein, along the first direction, each of the light transmitting portions comprises a first light transmitting region and a second light transmitting region in sequence;
• forming a plurality of first phase delay films on the light emitting side of the pixels, wherein the plurality of first phase delay films correspond to the first light transmitting regions of the plurality of light transmitting portions respectively, the first light transmitting regions completely fall into an orthographic projection of the first phase delay films on the parallax barrier, and the orthographic projection of the first phase delay films on the parallax barrier is not overlapped with the second light transmitting regions,
• wherein the first phase delay films are configured to make polarized light emitted from the first light transmitting regions of the display substrate have a first polarization direction and polarized light emitted from the second light transmitting regions of the display substrate have a second polarization direction, the first polarization direction is different from the second polarization.