Display element, display panel, and method for manufacturing the display element
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- BOE TECHNOLOGY GROUP CO LTD
- Filing Date
- 2023-05-26
- Publication Date
- 2026-06-09
Smart Images
Figure 2026518484000001_ABST
Abstract
Claims
1. Base board and A plurality of light-emitting units are located on the base substrate and each unit has a first electrode, a second electrode, and a light-emitting layer located between the first electrode and the second electrode, wherein the first electrode is located between the light-emitting layer and the base substrate. A sealing layer covering the plurality of light-emitting units, A color filter layer is located on the side of the sealing layer furthest from the base substrate and includes a first surface and a second surface facing each other in a direction perpendicular to the base substrate, wherein the roughness of the first surface is greater than the roughness of the second surface. Display element.
2. The first surface is further from the base substrate than the second surface. The display element according to claim 1.
3. The color filter layer includes a plurality of color filters that correspond one-to-one with the plurality of light-emitting units, wherein at least one of the color filters has a surface roughness greater than that of at least a portion of the surface on the side furthest from the base substrate than that of the other color filters on the side furthest from the base substrate. The display element according to claim 1 or 2.
4. The plurality of color filters include a first color filter, a second color filter, and a third color filter, wherein the roughness of at least a portion of the surface of the first color filter on the side furthest from the base substrate is greater than the surface roughness of the second and third color filters on the side furthest from the base substrate. A display element according to any one of claims 1 to 3.
5. The first color filter includes a first central region on the side furthest from the base substrate and a first edge region surrounding the first central region, wherein the roughness of the first edge region is greater than the surface roughness of the second and third color filters on the side furthest from the base substrate. The display element according to claim 4.
6. The roughness of the surface of the first color filter furthest from the base substrate decreases from the edge towards the center, such that the average roughness of the first edge region of the first color filter is greater than the average roughness of the first central region. The display element according to claim 5.
7. The roughness of the first central region is in the range of 50 nm to 150 nm, and the roughness of the first edge region is in the range of 150 nm to 200 nm. The display element according to claim 4.
8. The second color filter includes a second central region on the side furthest from the base substrate and a second edge region surrounding the second central region, wherein the roughness of the second edge region is smaller than that of the second central region. A display element according to any one of claims 4 to 7.
9. The roughness of the first edge region of the first color filter is greater than the roughness of the second central region of the second color filter. The display element according to claim 8.
10. The third color filter has a basically uniform roughness on the side furthest from the base substrate. A display element according to any one of claims 4 to 9.
11. The coarseness of the second central region of the second color filter is greater than the coarseness of the third color filter. The display element according to claim 10.
12. The first, second, and third color filters are installed parallel to the base substrate and overlap each other. The difference in thickness between the first, second, and third color filters is smaller than the width of the overlapping portion between them, and the width of the overlapping portion is the size of the overlapping portion in the direction parallel to the base substrate. A display element according to any one of claims 4 to 11.
13. The first color filter is positioned between the second color filter and the third color filter and partially covers the second color filter and the third color filter, such that the portion of the first color filter covering the second color filter forms a first protrusion, and the portion of the first color filter covering the third color filter forms a second protrusion. A display element according to any one of claims 4 to 11.
14. The first and second protrusions each have a lower surface facing the base substrate and an upper surface on the side further away from the base substrate, and the roughness of the lower surface is less than that of the upper surface. The display element according to claim 13.
15. The color filter layer is located on the side furthest from the base substrate and further includes a plurality of lenses that correspond one-to-one with the plurality of light-emitting units. A display element according to any one of claims 1 to 14.
16. The device further comprises a first flat layer, the first flat layer located on the side of the color filter layer furthest from the base substrate, the color filter layer includes a plurality of color filters corresponding one-to-one to the plurality of light-emitting units, the plurality of color filters are arranged in a direction parallel to the base substrate and overlap each other, and the ratio of the thickness of the first flat layer to the width of the overlapping portion between the plurality of color filters is in the range of 1 to 1.
8. A display element according to any one of claims 1 to 15.
17. Multiple lenses, which correspond one-to-one with the multiple color filters, are installed on the side of the first flat layer furthest from the base substrate. The display element according to claim 16.
18. The color filter further includes a second flat layer, the second flat layer being located between the color filter layer and the sealing layer, the thickness of the second flat layer being thinner than the thickness of the first flat layer, and the difference in thickness between the multiple color filters being smaller than the thickness of the second flat layer. The display element according to claim 16.
19. The average thickness of the color filter layer is less than 1.3 μm, and the difference in thickness between the multiple color filters is less than 100 nm. A display element according to any one of claims 1 to 18.
20. The first color filter is a green color filter, the second color filter is a red color filter, and the third color filter is a blue color filter. A display element according to any one of claims 4 to 19.
21. Base board and A plurality of light-emitting units are located on the base substrate and each unit has a first electrode, a second electrode, and a light-emitting layer located between the first electrode and the second electrode, wherein the first electrode is located between the light-emitting layer and the base substrate. A sealing layer covering the plurality of light-emitting units, A color filter layer is located on the side of the sealing layer furthest from the base substrate and includes a first surface and a second surface that face each other in a direction perpendicular to the base substrate, wherein both the first surface and the second surface have minute protrusions, the size of the minute protrusions on the first surface is larger than the size of the minute protrusions on the second surface, and the size of the minute protrusions is the size of the minute protrusions in a direction perpendicular to the base substrate. Display element.
22. The first surface is further from the base substrate than the second surface. The display element according to claim 21.
23. The size of the microprotrusions on the first surface is in the range of 5 nm to 20 nm. The display element according to claim 21 or 22.
24. The color filter layer includes a first color filter, a second color filter, and a third color filter, wherein the size of the microprotrusions on at least a portion of the surface of the first color filter that is farther from the base substrate is greater than the size of the microprotrusions on the surfaces of the second and third color filters that are farther from the base substrate. A display element according to any one of claims 21 to 23.
25. The first color filter has a first central region on the side furthest from the base substrate and a first edge region surrounding the first central region, and the size of the microprotrusions in the first edge region is larger than the size of the microprotrusions on the side furthest from the base substrate of the second color filter and the third color filter. The display element according to claim 24.
26. The size of the multiple micro-protrusions on the surface of the first color filter furthest from the base substrate decreases from the edge of the first color filter toward the center, such that the average size of the multiple micro-protrusions in the first edge region of the first color filter is greater than the average size of the multiple micro-protrusions in the first central region. The display element according to claim 25.
27. The second color filter includes a second central region on the side furthest from the base substrate and a second edge region surrounding the second central region, wherein the size of the micro-protrusions in the second edge region is smaller than the size of the micro-protrusions in the second central region, and the size of the micro-protrusions in the first edge region of the first color filter is larger than the size of the micro-protrusions in the second central region of the second color filter. A display element according to any one of claims 24 to 26.
28. The size of the micro-protrusions on the surface of the third color filter furthest from the base substrate is basically the same, and the size of the micro-protrusions in the second central region of the second color filter is larger than the size of the micro-protrusions of the third color filter. A display element according to any one of claims 24 to 27.
29. The first, second, and third color filters are installed parallel to the base substrate and overlap each other. The difference in thickness between the first, second, and third color filters is smaller than the width of the overlapping portion between them, and the width of the overlapping portion is the size of the overlapping portion in the direction parallel to the base substrate. A display element according to any one of claims 24 to 28.
30. A first flat layer located on the side of the color filter layer furthest from the base substrate, wherein the color filter layer includes a plurality of color filters corresponding one-to-one to the plurality of light-emitting units, the plurality of color filters are installed in a direction parallel to the base substrate and overlap each other, and the ratio of the thickness of the first flat layer to the width of the overlapping portion between the plurality of color filters is in the range of 1 to 1.
8. The second flat layer is located between the color filter layer and the sealing layer, wherein the thickness of the second flat layer is less than the thickness of the first flat layer, and the difference in thickness between the plurality of color filters is less than the thickness of the second flat layer. A display element according to any one of claims 1 to 14.
31. Includes a plurality of display elements according to any one of claims 1 to 30 Display panel.
32. The display panel includes a display area and a peripheral area located on at least one side of the display area, the display element is located within the display area, and a light-shielding layer is provided in the peripheral area. The light-shielding layer includes a plurality of sublayers stacked perpendicular to the base substrate, each sublayer being made of the same material as one of the plurality of color filters in the color filter layer, the upper sublayer furthest from the base substrate having a greater surface roughness than the other sublayers, and the upper sublayer being the sublayer furthest from the base substrate among the plurality of sublayers. The display element according to claim 31.
33. The upper sublayer has a fourth central region and a fourth edge region surrounding the fourth central region on the surface furthest from the base substrate, and the roughness of the fourth central region is greater than that of the fourth edge region. The display element according to claim 32.
34. The peripheral region surrounds the display region, the light-shielding layer extends along the peripheral region, and the projection of the light-shielding layer onto the base substrate forms a ring-shaped band. A display element according to any one of claims 31 to 33.
35. A method for manufacturing a display element according to any one of claims 1 to 30, Forming multiple light-emitting units on a base substrate, Forming a sealing layer that covers at least one of the light-emitting units, A color filter material layer is formed on the side of the sealing layer furthest from the base substrate, The photosensitive material is applied to the color filter material layer such that the color filter material layer is completely covered by the photosensitive material. The method involves removing a portion of the photosensitive material and the color filter material layer by an etch-back process to obtain a color filter layer, wherein the color filter layer includes a first surface and a second surface facing each other in a direction perpendicular to the base substrate, and the roughness of the first surface is greater than the roughness of the second surface. A method for manufacturing a display element.
36. The further includes forming a plurality of lenses on the side of the color filter layer furthest from the base substrate, corresponding one-to-one with the plurality of light-emitting units. The method according to claim 35.
37. The photosensitive material is a photoresist, and the etching selectivity ratio of the photoresist to the color filter material layer is basically 1:
1. The method according to claim 35.
38. Removing a portion of the photosensitive material and the color filter material layer by the etch-back process is, Etching is performed on the color filter material layer coated with the photosensitive material until the color filter material layer is reduced to a first thickness. The method includes over-etching the color filter material layer of the first thickness until the color filter material layer is further thinned to a second thickness. The method according to any one of claims 35 to 37.
39. The further step includes forming a first flat layer on the color filter layer before forming the plurality of lenses. The method according to any one of claims 35 to 38.