Direct type backlight and method of manufacturing the same, and display device

A method of manufacturing a light source, the method comprising:

• providing a light emitting module, the light emitting module comprising a substrate and a plurality of light emitting units arranged on the substrate;
• and
• providing a lens film layer on a light emitting side of the light emitting module,
• wherein one side of the lens film layer away from the substrate is provided with a plurality of collimating structures arranged in an array, and each of the collimating structures comprises at least one convex surface structure,
• wherein the plurality of collimating structures are in one-to-one correspondence with the plurality of light emitting units, and an area of an orthographic projection of each of light emitting units on the substrate is within an area of an orthographic projection of corresponding one of the collimating structures on the substrate,
• wherein each of the collimating structures comprises a first convex surface structure and at least one annular convex surface structure arranged around the first convex surface structure, and
• wherein a focal point of the first convex surface structure coincides with a focal point of the at least one annular convex surface structure.

A light source, comprising:

• a light emitting module comprising a substrate and a plurality of light emitting units arranged on the substrate;
• a lens film layer positioned on a light emitting side of the light emitting module, wherein one side of the lens film layer away from the substrate is provided with a plurality of collimating structures arranged in an array, and each of the collimating structures comprises at least one convex surface structure;
• and
• a prism film layer positioned on one side of the lens film layer away from the substrate,
• wherein the plurality of collimating structures are in one-to-one correspondence with the plurality of light emitting units, and an area of an orthographic projection of each of light emitting units on the substrate is within an area of an orthographic projection of corresponding one of the collimating structures on the substrate,
• wherein a plurality of first bench-shaped protrusion structures arranged in an array are disposed on one side of the prism film layer close to the lens film layer,
• wherein the plurality of the first bench-shaped structures are in one-to-one correspondence with the plurality of collimating structures, and
• wherein an area where each of the collimating structures is located is within an area of an orthographic projection of a corresponding one of the first bench-shaped protrusion structures on the lens film layer.