Display panel, preparing method thereof, and display device

A preparing method for a display panel, comprising:

• providing a base substrate;
• preparing a plurality of light-emitting units on a side of the base substrate;
• preparing a patterned optical adjustment unit on a side of a light-emitting unit of the plurality of light-emitting units facing away from the base substrate;
• and
• in a first direction, preparing a color filter unit on at least one side of the optical adjustment unit, wherein in a thickness direction of the display panel, the color filter unit at least partially overlaps the light-emitting unit;
• the first direction is a direction parallel to a flat surface in which the base substrate is disposed;
• and a refractive index of the color filter unit is greater than a refractive index of the optical adjustment unit.

A display device, comprising a display panel, wherein the display panel comprises a display region,

• wherein the display panel further comprises:
• a base substrate;
• a plurality of light-emitting units disposed on a side of the base substrate, wherein the plurality of light-emitting units are disposed in the display region;
• a color filter layer disposed on a side of the plurality of light-emitting units facing away from the base substrate, wherein the color filter layer comprises a plurality of color filter units, and in a thickness direction of the display panel, a color filter unit of the plurality of color filter units at least partially overlaps a light-emitting unit of the plurality of light-emitting units;
• and
• an optical adjustment layer disposed on a side of the base substrate, wherein the optical adjustment layer comprises a plurality of optical adjustment units, and in a first direction, at least one of the plurality of optical adjustment units is disposed between adjacent color filter units of the plurality of color filter units, and the first direction is a direction parallel to a flat surface in which the base substrate is disposed;
• and
• wherein a refractive index of the color filter unit is greater than a refractive index of an optical adjustment unit of the plurality of optical adjustment units.