Display panel with light interference and manufacturing method therefor, and display device

1. A display panel, comprising: a base substrate, and a plurality of pixels arranged in an array on the base substrate,

wherein each of the plurality of pixels comprises a plurality of sub-pixels of different colors;

each of the plurality of sub-pixels comprises:

a reflection layer on the base substrate;

a first color filter layer at a side of the reflection layer away from the base substrate;

a first electrode at a side of the first color filter layer away from the base substrate;

a light-emitting layer at a side of the first electrode away from the base substrate; and

a second electrode at a side of the light-emitting layer away from the base substrate, and

in each of the plurality of pixels, a color of the first color filter layer of each of the plurality of sub-pixels is a same as a color of a respective sub-pixel where the first color filter layer of the respective sub-pixel is located, and thicknesses in a direction perpendicular to the base substrate of first color filter layers of the plurality of sub-pixels are different from each other, wherein each of the plurality of pixels comprises a red sub-pixel, a green sub-pixel, and a blue sub-pixel;

a thickness in the direction perpendicular to the base substrate of the first color filter layer of the green sub-pixel is configured such that an optical path difference between second light which is generated by reflection of first light by a light-exiting surface of the display panel and third light generated by the first light which is reflected by a reflective surface of the first color filter layer and exits from the light-exiting surface of the display panel is equal to an odd number of times of a half-wavelength of the first light; and

the first light is green light, which is propagated toward the light-exiting surface of the display panel, in ambient light.

2. The display panel according to claim 1 , wherein the first electrode is a transparent electrode layer or a transflective electrode layer, and the second electrode is a transparent electrode layer or a transflective electrode layer.

3. The display panel according to claim 1 , wherein a wavelength of the green light is 550 nm 560 nm.

4. The display panel according to claim 1 , wherein light that is emitted by the light-emitting layer in the red sub-pixel comprises red light;

a red stationary wave is generated in the red sub-pixel by the red light emitted by the light-emitting layer in the red sub-pixel and red light, that enters in the red sub-pixel, in the ambient light; and

a thickness in the direction perpendicular to the base substrate of the first color filter layer of the red sub-pixel is configured to allow the light-emitting layer in the red sub-pixel to be at an antinode of the red stationary wave.

5. The display panel according to claim 4 , wherein the thickness in the direction perpendicular to the base substrate of the first color filter layer of the red sub-pixel is configured to allow the light-emitting layer in the red sub-pixel to be at a second antinode of the red stationary wave.

6. The display panel according to claim 1 , wherein light that is emitted by the light-emitting layer in the blue sub-pixel comprises blue light;

a blue stationary wave is generated in the blue sub-pixel by the blue light emitted by the light-emitting layer in the blue sub-pixel and blue light, that enters in the blue sub-pixel, in the ambient light; and

a thickness in the direction perpendicular to the base substrate of the first color filter layer of the blue sub-pixel is configured to allow the light-emitting layer in the blue sub-pixel to be at an antinode of the blue stationary wave.

7. The display panel according to claim 6 , wherein the thickness in the direction perpendicular to the base substrate of the first color filter layer of the blue sub-pixel is configured to allow the light-emitting layer in the blue sub-pixel to be at a second antinode of the blue stationary wave.

8. A display panel, comprising: a base substrate, and a plurality of pixels arranged in an array on the base substrate,

wherein each of the plurality of pixels comprises a plurality of sub-pixels of different colors;

each of the plurality of sub-pixels comprises:

a reflection layer on the base substrate;

a first color filter layer at a side of the reflection layer away from the base substrate;

a first electrode at a side of the first color filter layer away from the base substrate;

a light-emitting layer at a side of the first electrode away from the base substrate; and

a second electrode at a side of the light-emitting layer away from the base substrate, and

in each of the plurality of pixels, a color of the first color filter layer of each of the plurality of sub-pixels is a same as a color of a respective sub-pixel where the first color filter layer of the respective sub-pixel is located, and thicknesses in a direction perpendicular to the base substrate of the first color filter layers of the plurality of sub-pixels are different from each other, wherein each of the plurality of sub-pixels further comprises: a second color filter layer at a side of the second electrode away from the base substrate; and

in each of the plurality of sub-pixels, a color of the second color filter layer is the same as the color of the first color filter layer.

9. The display panel according to claim 8 , wherein, in each of the plurality of pixels, the light-emitting layer in each of the plurality of sub-pixels emits monochromatic light, and a color of the monochromatic light is the same as the color of the second color filter layer.

10. The display panel according to claim 1 , wherein, in each of the plurality of pixels, light emitted by the light-emitting layer in each of the plurality of sub-pixels is white light.

11. The display panel according to claim 1 , wherein each of the plurality of sub-pixels further comprises a hole injection layer and a hole transport layer which are between the first electrode and the light-emitting layer and sequentially stacked in the direction perpendicular to the base substrate.

12. The display panel according to claim 1 , wherein each of the plurality of sub-pixels further comprises an electron injection layer and an electron transport layer which are between the second electrode and the light-emitting layer and sequentially stacked in the direction perpendicular to the base substrate.

13. The display panel according to claim 8 , further comprising: an encapsulation cover plate at a side of the second color filter layer away from the base substrate.

14. A display device, comprising: the display panel according to claim 1 .

15. A manufacturing method of a display panel, comprising:

providing a base substrate;

forming a plurality of pixels arranged in an array on the base substrate, wherein each of the plurality of pixels comprises a plurality of sub-pixels of different colors, and forming the each of the plurality of sub-pixels comprises:

forming a reflection layer on the base substrate;

forming a first color filter layer, wherein the first color filter layer is at a side of the reflection layer away from the base substrate;

forming a first electrode, wherein the first electrode is at a side of the first color filter layer away from the base substrate;

forming a light-emitting layer, wherein the light-emitting layer is at a side of the first electrode away from the base substrate; and

forming a second electrode, wherein the second electrode is at a side of the light-emitting layer away from the base substrate,

wherein, in each of the plurality of pixels, a color of the first color filter layer of each of the plurality of sub-pixels is the same as a color of a respective sub-pixel where the first color filter layer of the respective sub-pixel is located, and thicknesses of the first color filter layers of the plurality of sub-pixels are different from each other.

16. The manufacturing method of the display panel according to claim 15 , wherein the each of the plurality of pixels comprises a red sub-pixel, a green sub-pixel, and a blue sub-pixel;

a thickness in a direction perpendicular to the base substrate of the first color filter layer of the green sub-pixel is configured to allow an optical path difference between second light which is generated by reflection of first light by a light-exiting surface of the display panel and third light generated by the first light which is reflected by a reflective surface of the first color filter layer and exited from the light-exiting surface of the display panel to be equal to an odd number of times of a half-wavelength of the first light; and

the first light is green light, which is propagated toward the light-exiting surface of the display panel, in ambient light.

17. The manufacturing method of the display panel according to claim 16 , wherein light that is emitted by the light-emitting layer in the red sub-pixel comprises red light;

a red stationary wave is generated in the red sub-pixel by the red light emitted by the light-emitting layer in the red sub-pixel and red light, that enters in the red sub-pixel, in the ambient light; and

the thickness in the direction perpendicular to the base substrate of the first color filter layer of the red sub-pixel is configured to allow the light-emitting layer in the red sub-pixel to be at an antinode of the red stationary wave.

18. The manufacturing method of the display panel according to claim 16 , wherein light that is emitted by the light-emitting layer in the blue sub-pixel comprises blue light;

a blue stationary wave is generated in the blue sub-pixel by the blue light emitted by the light-emitting layer in the blue sub-pixel and blue light, that enters in the blue sub-pixel, in the ambient light; and

the thickness in the direction perpendicular to the base substrate of the first color filter layer of the blue sub-pixel is configured to allow the light-emitting layer in the blue sub-pixel to be at an antinode of the blue stationary wave.

19. The display panel according to claim 8 , wherein each of the plurality of pixels comprises a red sub-pixel, a green sub-pixel, and a blue sub-pixel;

a thickness in the direction perpendicular to the base substrate of the first color filter layer of the green sub-pixel is configured such that an optical path difference between second light which is generated by reflection of first light by a light-exiting surface of the display panel and third light generated by the first light which is reflected by a reflective surface of the first color filter layer and exits from the light-exiting surface of the display panel is equal to an odd number of times of a half-wavelength of the first light; and

the first light is green light, which is propagated toward the light-exiting surface of the display panel, in ambient light.