Display panel and display device

Abstract

A display panel and a display device. The display panel comprises: a display backplane, which comprises three types of sub-pixels; and a touch layer group, a first filter layer and a second filter layer, which are disposed on a light-emergent side of the display backplane, wherein the touch layer group comprises an insulating layer group, the insulating layer group comprises at least two insulating layers and is provided with a first recessed portion and a second recessed portion, and the orthographic projection of the first recessed portion on the display backplane overlaps first sub-pixels; at least part of the first filter layer is located in the first recessed portion, and the refractive index of the first filter layer is greater than the refractive index of an insulating layer provided with the first recessed portion; at least part of the second filter layer is located in the second recessed portion, and the refractive index of the second filter layer is different from the refractive index of the first filter layer and is greater than the refractive index of an insulating layer provided with the second recessed portion; and the orthographic projection of the second recessed portion on the display backplane overlaps second sub-pixels, and the area of the total reflection surface of a recessed portion corresponding to a filter layer with a larger refractive index among the first filter layer and the second filter layer is smaller.

Description

Display panel and display device

[0001] Cross-references

[0002] This disclosure claims priority to Chinese Patent Application No. 202411524640.2, filed on October 29, 2024, entitled “Display Panel and Display Device,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of display technology, and more specifically, to a display panel and a display device. Background Technology

[0004] Organic light-emitting diode (OLED) display panels have become the mainstream development direction in the field of display technology due to their advantages such as self-illumination, high brightness, good image quality, and low energy consumption.

[0005] However, the light emission efficiency of sub-pixels of different colors in current display panels is different, which makes the display panels prone to color deviation.

[0006] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0007] The purpose of this disclosure is to overcome the shortcomings of the prior art and to provide a display panel and a display device.

[0008] According to one aspect of this disclosure, a display panel is provided, comprising:

[0009] The display back panel includes a first sub-pixel, a second sub-pixel, and a third sub-pixel;

[0010] A touch layer group is disposed on the light-emitting side of the display back panel. The touch layer group includes an insulating layer group, which includes at least two insulating layers. A first recess is provided on the insulating layer group. The orthographic projection of the first recess on the display back panel at least partially overlaps with the first sub-pixel.

[0011] A first filter layer is disposed on the light-emitting side of the display back panel, at least a portion of the first filter layer is located within the first recess, and the refractive index of the first filter layer is greater than the refractive index of the insulating layer in which the first recess is disposed;

[0012] A second filter layer is disposed on the light-emitting side of the display back panel, and the refractive index of the second filter layer is different from that of the first filter layer;

[0013] The insulating layer group is provided with a second recessed portion, the orthographic projection of the second recessed portion on the display back panel overlaps with the second sub-pixel at least partially, at least part of the second filter layer is located in the second recessed portion, the refractive index of the second filter layer is greater than the refractive index of the insulating layer in which the second recessed portion is provided, and the total reflection surface area of ​​the recessed portion corresponding to the one with the larger refractive index between the first filter layer and the second filter layer is smaller.

[0014] Alternatively, the insulating layer group includes a second protrusion, the orthographic projection of the second protrusion on the display back panel at least partially overlapping the second sub-pixel, the second filter layer is disposed on the side of the second protrusion away from the display back panel and covers at least part of the sidewall of the second protrusion, the refractive index of the second filter layer is less than the refractive index of the second protrusion, and the distance between the first recess or the side of the second protrusion near the display back panel corresponding to the one with the larger refractive index of the first filter layer and the second filter layer is small.

[0015] In one exemplary embodiment of this disclosure, the display panel further includes:

[0016] A third filter layer is disposed on the light-emitting side of the display back panel, and the refractive index of the third filter layer is different from that of the first filter layer.

[0017] The insulating layer group is provided with a third recess, the orthographic projection of the third recess on the display back panel overlaps at least partially with the third sub-pixel, at least part of the third filter layer is located in the third recess, the refractive index of the third filter layer is greater than the refractive index of the insulating layer in which the third recess is provided, and the total reflection surface area of ​​the recess corresponding to the one with the larger refractive index between the first filter layer and the third filter layer is smaller.

[0018] Alternatively, the insulating layer group includes a third protrusion, the orthographic projection of which on the display back panel at least partially overlaps with the third sub-pixel, the third filter layer is disposed on the side of the third protrusion away from the display back panel and covers at least a portion of the sidewall of the third protrusion, the refractive index of the third filter layer is less than the refractive index of the insulating layer on which the third protrusion is disposed, and the distance between the first recess or the side of the third protrusion near the display back panel corresponding to the one with the larger refractive index of the first filter layer and the third filter layer and the display back panel is small.

[0019] In an exemplary embodiment of this disclosure, the distance between the side of the first recess near the display back panel and the display back panel is a first distance, the distance between the side of the second protrusion near the display back panel and the display back panel is a second distance, and the distance between the side of the third protrusion near the display back panel and the display back panel is a third distance.

[0020] The refractive index of the third filter layer is less than that of the first filter layer, the refractive index of the second filter layer is less than that of the first filter layer, the second distance is greater than the first distance, and the third distance is greater than the first distance;

[0021] Alternatively, the refractive index of the third filter layer is greater than that of the first filter layer, the refractive index of the second filter layer is greater than that of the first filter layer, the second distance is less than the first distance, and the third distance is less than the first distance.

[0022] In one exemplary embodiment of this disclosure, the refractive index of the second filter layer is equal to the refractive index of the third filter layer, and the second distance is equal to the third distance; or, the refractive index of the second filter layer is less than the refractive index of the third filter layer, and the second distance is greater than the third distance; or, the refractive index of the second filter layer is greater than the refractive index of the third filter layer, and the second distance is less than the third distance.

[0023] In one exemplary embodiment of this disclosure, the second protrusion is configured as a single-layer structure or a double-layer structure, and the third protrusion is configured as a single-layer structure or a double-layer structure.

[0024] In an exemplary embodiment of this disclosure, the touch layer group includes a base layer, a first touch functional layer, a touch insulating layer, a second touch functional layer, and a protective layer stacked sequentially, wherein the base layer, the touch insulating layer, and the protective layer are all the insulating layer;

[0025] The first recess is disposed on the base layer, and the second and third protrusions are disposed on the touch insulating layer; or, the first recess is disposed on the base layer, and the second and third protrusions are disposed on the protective layer; or, the first recess is disposed on the touch insulating layer, and the second and third protrusions are disposed on the protective layer; or, the first recess is disposed on the base layer, the touch insulating layer includes a first sub-protrusion and a second sub-protrusion, the protective layer includes a third sub-protrusion and a fourth sub-protrusion, the third sub-protrusion is disposed on the side of the first sub-protrusion facing away from the display back panel, the fourth sub-protrusion is disposed on the side of the second sub-protrusion facing away from the display back panel, the second protrusion includes the first sub-protrusion and the third sub-protrusion, and the third protrusion includes the second sub-protrusion and the fourth sub-protrusion; or, the first recess is disposed on the base layer, and the second protrusion is disposed on the protective layer. A touch insulating layer, wherein the third protrusion is disposed on the protective layer; or, the first recess is disposed on the base layer, the second protrusion is disposed on the protective layer, and the third protrusion is disposed on the touch insulating layer; or, the first recess is disposed on the protective layer, and the second and third protrusions are disposed on the base layer; or, the first recess is disposed on the touch insulating layer, and the second and third protrusions are disposed on the base layer; or, the first recess is disposed on the protective layer, the base layer includes a first sub-protrusion and a second sub-protrusion, the touch insulating layer includes a third sub-protrusion and a fourth sub-protrusion, the third sub-protrusion is disposed on the side of the first sub-protrusion facing away from the display back panel, the fourth sub-protrusion is disposed on the side of the second sub-protrusion facing away from the display back panel, the second protrusion includes the first sub-protrusion and the third sub-protrusion, and the third protrusion includes the second sub-protrusion and the fourth sub-protrusion.

[0026] In one exemplary embodiment of this disclosure, the first recess, the second recess, and the third recess are disposed on the same insulating layer.

[0027] In one exemplary embodiment of this disclosure, the first recess, the second recess, and the third recess are provided on one layer of the insulating layer, or the first recess, the second recess, and the third recess are provided on two adjacent layers of the insulating layer.

[0028] In an exemplary embodiment of this disclosure, the touch layer group includes a base layer, a first touch functional layer, a touch insulating layer, a second touch functional layer, and a protective layer stacked sequentially, wherein the base layer, the touch insulating layer, and the protective layer are all the insulating layer;

[0029] The first recess, the second recess, and the third recess are disposed on the base layer; or, the first recess, the second recess, and the third recess are disposed on the touch insulating layer; or, the first recess, the second recess, and the third recess are disposed on the protective layer; or, the base layer has a first sub-recess, a second sub-recess, and a third sub-recess, and the touch insulating layer has a fourth sub-recess, a fifth sub-recess, and a sixth sub-recess, wherein the first recess includes the fourth sub-recess and the first sub-recess that are interconnected, and the second recess includes the fourth sub-recess and the first sub-recess that are interconnected. The fifth sub-recessed portion and the second sub-recessed portion are connected, and the third sub-recessed portion includes the sixth sub-recessed portion and the third sub-recessed portion that are connected to each other; or, the touch insulating layer is provided with a first sub-recessed portion, a second sub-recessed portion and a third sub-recessed portion, and the protective layer is provided with a fourth sub-recessed portion, a fifth sub-recessed portion and a sixth sub-recessed portion, wherein the first sub-recessed portion includes the fourth sub-recessed portion and the first sub-recessed portion that are connected to each other, the second sub-recessed portion includes the fifth sub-recessed portion and the second sub-recessed portion that are connected to each other, and the third sub-recessed portion includes the sixth sub-recessed portion and the third sub-recessed portion that are connected to each other.

[0030] In an exemplary embodiment of this disclosure, the refractive index of the first filter layer is greater than that of the second filter layer, and the refractive index of the first filter layer is greater than that of the third filter layer; the first recess is configured in a shape adapted to the first sub-pixel, the second recess is configured in a ring shape adapted to the second sub-pixel, and the third recess is configured in a ring shape adapted to the third sub-pixel;

[0031] And / or, the first recess is configured as a blind hole that does not penetrate the insulating layer, the second recess is configured as a through hole that penetrates the insulating layer, and the third recess is configured as a through hole that penetrates the insulating layer.

[0032] In one exemplary embodiment of this disclosure, the touch layer group further includes:

[0033] A functional layer is disposed between two adjacent insulating layers. The functional layer includes a dummy portion, which has a via. The orthographic projection of the via on the display back panel covers the first sub-pixel. The dummy portion extends at least to the sidewall of the first recess.

[0034] In one exemplary embodiment of this disclosure, the functional layer is either the first touch functional layer or the second touch functional layer.

[0035] In one exemplary embodiment of this disclosure, the projected area of ​​the end of the fourth sub-recess near the first sub-recess on the display back panel is greater than the projected area of ​​the end of the first sub-recess near the fourth sub-recess on the display back panel, so that the first recess forms a stepped structure with an opening larger than the bottom.

[0036] In an exemplary embodiment of this disclosure, the first touch functional layer includes a bridging portion, the second touch functional layer includes a touch electrode, the orthographic projection of the first filter layer on the display back panel does not overlap with the orthographic projections of the bridging portion and the touch electrode on the display back panel, the orthographic projection of the second filter layer on the display back panel does not overlap with the orthographic projections of the bridging portion and the touch electrode on the display back panel, and the orthographic projection of the third filter layer on the display back panel does not overlap with the orthographic projections of the bridging portion and the touch electrode on the display back panel.

[0037] In one exemplary embodiment of this disclosure, the distance between the edge of the orthographic projection of the via on the display back panel and the edge of the first sub-pixel is greater than or equal to 0 and less than or equal to 1 micrometer; and / or, the distance between the edge of the orthographic projection of the via on the display back panel and the edge of the orthographic projection of the first recess on the display back panel is greater than or equal to 0 and less than or equal to 2 micrometers; and / or, the dummy portion is configured as an annular shape, and the annular width of the dummy portion is greater than or equal to 3 micrometers and less than or equal to 4 micrometers.

[0038] In one exemplary embodiment of this disclosure, when the thickness of the insulating layer in which the first recess is provided is greater than or equal to 1.5 micrometers and less than or equal to 2.5 micrometers, and when the first recess is provided as a blind hole that does not penetrate the insulating layer, the thickness of the insulating layer at the first recess is greater than or equal to 0.5 micrometers and less than or equal to 1 micrometer.

[0039] In one exemplary embodiment of this disclosure, the orthographic projection of the first recess on the display back panel completely covers the first sub-pixel, and / or, the orthographic projection of the second recess on the display back panel completely covers the second sub-pixel, and / or, the orthographic projection of the third recess on the display back panel completely covers the third sub-pixel.

[0040] Alternatively, the orthographic projection of the first recess on the display back panel completely covers the first sub-pixel, and / or, the orthographic projection of the second protrusion on the display back panel completely covers the second sub-pixel, and / or, the orthographic projection of the third protrusion on the display back panel completely covers the third sub-pixel.

[0041] In an exemplary embodiment of this disclosure, the distance between the edge of the orthographic projection of the first recess on the display back panel and the edge of the first sub-pixel is greater than or equal to 0.5 micrometers and less than or equal to 2 micrometers, and / or the distance between the edge of the orthographic projection of the second recess on the display back panel and the edge of the second sub-pixel is greater than or equal to 0.5 micrometers and less than or equal to 2 micrometers, and / or the distance between the orthographic projection of the third recess on the display back panel and the edge of the third sub-pixel is greater than or equal to 0.5 micrometers and less than or equal to 2 micrometers;

[0042] Alternatively, the distance between the edge of the orthographic projection of the first recess on the display back panel and the edge of the first sub-pixel is greater than or equal to 0.5 micrometers and less than or equal to 2 micrometers, and / or the distance between the edge of the orthographic projection of the second protrusion on the display back panel and the edge of the second sub-pixel is greater than or equal to 0.5 micrometers and less than or equal to 2 micrometers, and / or the distance between the orthographic projection of the third protrusion on the display back panel and the edge of the third sub-pixel is greater than or equal to 0.5 micrometers and less than or equal to 2 micrometers.

[0043] In one exemplary embodiment of this disclosure, the distance between the sidewall of the first recess and the center of the first sub-pixel in the first direction increases as the height of the sidewall of the first recess increases in the second direction;

[0044] The distance between the sidewall of the second recess and the center of the second sub-pixel in the first direction increases as the height of the sidewall of the second recess in the second direction increases; the distance between the sidewall of the third recess and the center of the third sub-pixel in the first direction increases as the height of the sidewall of the third recess in the second direction increases. Alternatively, when the second recess is annular, the distance between the outer annular sidewall of the second recess and the center of the second sub-pixel in the first direction increases as the height of the outer annular sidewall of the second recess in the second direction increases; the distance between the inner annular sidewall of the second recess and the center of the second sub-pixel in the first direction decreases as the height of the inner annular sidewall of the second recess in the second direction increases. When the third recess is annular, the distance between the outer annular sidewall of the third recess and the center of the third sub-pixel in the first direction increases as the height of the outer annular sidewall of the third recess in the second direction increases; the distance between the inner annular sidewall of the third recess and the center of the third sub-pixel in the first direction decreases as the height of the inner annular sidewall of the third recess in the second direction increases.

[0045] Alternatively, the distance between the sidewall of the second protrusion and the center of the second sub-pixel in the first direction increases as the height of the sidewall of the second protrusion in the second direction decreases, and the distance between the sidewall of the third protrusion and the center of the third sub-pixel in the first direction increases as the height of the sidewall of the third protrusion in the second direction decreases.

[0046] The second direction is perpendicular to the side of the display back panel where the touch layer group is disposed, and the first direction is parallel to the side of the display back panel where the touch layer group is disposed.

[0047] In one exemplary embodiment of this disclosure, the sidewall of the first recess includes a slope, and the angle between the sidewall of the first recess and the first reference plane is greater than or equal to 55° and less than or equal to 85°.

[0048] The second recess has a sidewall comprising an inclined surface, and the angle between the sidewall of the second recess and the first reference plane is greater than or equal to 55° and less than or equal to 85°; the third recess has a sidewall comprising an inclined surface, and the angle between the sidewall of the third recess and the first reference plane is greater than or equal to 55° and less than or equal to 85°; or, the outer ring sidewall of the second recess has an inclined surface, and the angle between the outer ring sidewall of the second recess and the first reference plane is greater than or equal to 55° and less than or equal to 85°; the inner ring sidewall of the second recess has an inclined surface, and the angle between the inner ring sidewall of the second recess and the first reference plane is greater than or equal to 55° and less than or equal to 85°; the outer ring sidewall of the third recess has an inclined surface, and the angle between the outer ring sidewall of the third recess and the first reference plane is greater than or equal to 55° and less than or equal to 85°; the inner ring sidewall of the third recess has an inclined surface, and the angle between the inner ring sidewall of the third recess and the first reference plane is greater than or equal to 55° and less than or equal to 85°.

[0049] Alternatively, the sidewall of the second protrusion includes an inclined surface, and the angle between the sidewall of the second protrusion and the first reference plane is greater than or equal to 55° and less than or equal to 85°; the sidewall of the third protrusion includes an inclined surface, and the angle between the sidewall of the third protrusion and the first reference plane is greater than or equal to 55° and less than or equal to 85°.

[0050] The first reference plane is parallel to the side of the display back panel where the touch layer group is disposed.

[0051] In an exemplary embodiment of this disclosure, the refractive index of the first filter layer is greater than or equal to 1.65 and less than or equal to 1.75, the refractive index of the second filter layer is greater than or equal to 1.55 and less than or equal to 1.65, and the refractive index of the third filter layer is greater than or equal to 1.55 and less than or equal to 1.65.

[0052] The refractive index of the insulating layer of the first recess, the second recess, and the third recess is set to be greater than or equal to 1.45 and less than or equal to 1.55; or, the refractive index of the insulating layer of the first recess is set to be greater than or equal to 1.45 and less than or equal to 1.55, the refractive index of the insulating layer of the second protrusion is set to be greater than or equal to 1.7 and less than or equal to 1.85, and the refractive index of the insulating layer of the third protrusion is set to be greater than or equal to 1.7 and less than or equal to 1.85.

[0053] In one exemplary embodiment of this disclosure, the display panel further includes:

[0054] A light-shielding layer is disposed on the side of the touch layer group opposite to the display back panel. The light-shielding layer is provided with a first via, a second via, and a third via. The orthographic projection of the first via on the display back panel covers the first sub-pixel, the orthographic projection of the second via on the display back panel covers the second sub-pixel, and the orthographic projection of the third via on the display back panel covers the third sub-pixel. The orthographic projection of the light-shielding layer on the display back panel does not overlap with the orthographic projections of the first recess, the second recess, and the third recess on the display back panel, or the orthographic projection of the light-shielding layer on the display back panel does not overlap with the orthographic projections of the first recess, the second protrusion, and the third protrusion on the display back panel.

[0055] The second planarization layer is disposed on the side of the light-shielding layer opposite to the display back panel.

[0056] In one exemplary embodiment of this disclosure, the first sub-pixel is a red sub-pixel, the second sub-pixel is a green sub-pixel, and the third sub-pixel is a blue sub-pixel; the first filter layer is a red filter layer, the second filter layer is a green filter layer, and the third filter layer is a blue filter layer.

[0057] In one exemplary embodiment of this disclosure, the insulating layer is made of an organic material.

[0058] In one exemplary embodiment of this disclosure, the display back panel further includes an encapsulation layer group disposed on the side of the touch layer group near the first sub-pixel, the second sub-pixel, and the third sub-pixel.

[0059] According to another aspect of this disclosure, a display device is provided, comprising: the display panel described in any one of the preceding claims.

[0060] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0061] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0062] Figure 1 is a schematic diagram of the structure of a first example embodiment of the display panel of this disclosure.

[0063] Figure 2 is a structural schematic diagram of a second example embodiment of the display panel of this disclosure.

[0064] Figure 3 is a structural schematic diagram of a third exemplary embodiment of the display panel of this disclosure.

[0065] Figure 4 is a structural schematic diagram of a fourth exemplary embodiment of the display panel of this disclosure.

[0066] Figure 5 is a structural schematic diagram of a fifth exemplary embodiment of the display panel of this disclosure.

[0067] Figure 6 is a structural schematic diagram of a sixth exemplary embodiment of the display panel of this disclosure.

[0068] Figure 7 is a structural schematic diagram of a seventh exemplary embodiment of the display panel of this disclosure.

[0069] Figure 8 is a structural schematic diagram of the eighth exemplary embodiment of the display panel of this disclosure.

[0070] Figure 9 is a structural schematic diagram of the ninth exemplary embodiment of the display panel of this disclosure.

[0071] Figure 10 is a structural schematic diagram of a tenth exemplary embodiment of the display panel of this disclosure.

[0072] Figure 11 is a structural schematic diagram of the eleventh exemplary embodiment of the display panel of this disclosure.

[0073] Figure 12 is a schematic diagram of the structure of the twelfth exemplary embodiment of the display panel of this disclosure.

[0074] Figure 13 is a structural schematic diagram of a thirteenth exemplary embodiment of the display panel of this disclosure.

[0075] Figure 14 is a schematic diagram of the structure of the fourteenth exemplary embodiment of the display panel of this disclosure.

[0076] Figure 15 is a schematic diagram of the structure of the fifteenth exemplary embodiment of the display panel of this disclosure.

[0077] Figure 16 is a schematic diagram of the structure of the sixteenth exemplary embodiment of the display panel of this disclosure.

[0078] Figure 17 is a schematic diagram of the structure of the seventeenth exemplary embodiment of the display panel of this disclosure.

[0079] Figure 18 is a structural schematic diagram of the eighteenth exemplary embodiment of the display panel of this disclosure.

[0080] Figure 19 is a structural schematic diagram of the nineteenth exemplary embodiment of the display panel of this disclosure.

[0081] Figure 20 is a structural schematic diagram of the twentieth exemplary embodiment of the display panel of this disclosure.

[0082] Figure 21 is a structural schematic diagram of the twenty-first exemplary embodiment of the display panel of this disclosure.

[0083] Figure 22 is a structural schematic diagram of the twenty-second exemplary embodiment of the display panel of this disclosure.

[0084] Figure 23 is a structural schematic diagram of the twenty-third exemplary embodiment of the display panel of this disclosure.

[0085] Figure 24 is a structural schematic diagram of the twenty-fourth exemplary embodiment of the display panel of this disclosure.

[0086] Figure 25 is a structural schematic diagram of the twenty-fifth exemplary embodiment of the display panel of this disclosure.

[0087] Figure 26 is a structural schematic diagram of the twenty-sixth exemplary embodiment of the display panel of this disclosure.

[0088] Figure 27 is a structural schematic diagram of the twenty-seventh exemplary embodiment of the display panel of this disclosure.

[0089] Figure 28 is a structural schematic diagram of the twenty-eighth exemplary embodiment of the display panel of this disclosure.

[0090] Figure 29 is a structural schematic diagram of the twenty-ninth exemplary embodiment of the display panel of this disclosure.

[0091] Figure 30 is a structural schematic diagram of the thirtieth exemplary embodiment of the display panel of this disclosure.

[0092] Figure 31 is a structural schematic diagram of the thirty-first exemplary embodiment of the display panel of this disclosure.

[0093] Figure 32 is a structural schematic diagram of the thirty-second exemplary embodiment of the display panel of this disclosure.

[0094] Figure 33 is a structural schematic diagram of the thirty-third exemplary embodiment of the display panel of this disclosure.

[0095] Figure 34 is a structural schematic diagram of the thirty-fourth exemplary embodiment of the display panel of this disclosure.

[0096] Figure 35 is a structural schematic diagram of the thirty-fifth exemplary embodiment of the display panel of this disclosure.

[0097] Figure 36 is a structural schematic diagram of the thirty-sixth exemplary embodiment of the display panel of this disclosure.

[0098] Figure 37 is a schematic diagram of the structure of the back panel shown in Figures 1-36.

[0099] Figure 38 shows the relationship between the angle of light rays incident on the concave or convex portion of the emitted light from the sub-pixel and the light intensity.

[0100] Explanation of reference numerals in the attached drawings: 10. Display backplate; 1. Substrate; 2. Driving substrate; 21. Shielding layer; 22. Buffer layer; 231. Channel portion; 232. Source connection portion; 233. Drain connection portion; 24. Gate insulating layer; 25. Gate layer; 251. Gate; 26. Interlayer dielectric layer; 27. First interconnect conductor layer; 271. Source; 272. Drain; 28. First planarization layer; 3. Light-emitting substrate; 31. First electrode; 32. Pixel definition layer; 321. Opening; 33. Light-emitting layer group; 34. Second electrode; 35. Sub-pixel; 351. First sub-pixel; 352. Second sub-pixel; 353. Third sub-pixel; 4. Encapsulation layer group; 41. First inorganic layer; 42. Organic layer; 43. Second inorganic layer; 5. Touch layer group; 51. Base layer; 52. First touch functional layer; 521. Bridging portion; 53. Touch insulating layer; 54. Second touch functional layer; 541. Touch electrode; 55. Protective layer; 5z. Insulating layer group; 5a. Insulating layer; 5z1. First recessed portion; 5z11. First sub-recessed portion; 5z12. Fourth sub-recess; 5z2, Second recess; 5z21, Second sub-recess; 5z22, Fifth sub-recess; 5z3, Third recess; 5z31, Third sub-recess; 5z32, Sixth sub-recess; 5z4, Second island; 5z5, Third island; 5z6, Second protrusion; 5z61, First sub-protrusion; 5z62, Third sub-protrusion; 5z7, Third protrusion; 5z71, Second sub-protrusion; 5z72, Fourth sub-protrusion; 5b, Functional layer; 5b1, Dummy part; 5b11, Via; 61, First filter layer; 62, Second filter layer; 63, Third filter layer; 7, Light-shielding layer; 71, First via; 72, Second via; 73, Third via; 8, Second planarization layer; X, First direction; Y, Second direction. Detailed Implementation

[0101] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0102] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0103] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0104] In this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Furthermore, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0105] This disclosure provides a display panel, as shown in Figures 1-38. The display panel may include a display back panel 10, a touch layer group 5, a first light filter layer 61, and a second light filter layer 62. The display back panel 10 may include a first sub-pixel 351, a second sub-pixel 352, and a third sub-pixel 353. The touch layer group 5 is disposed on the light-emitting side of the display back panel 10. The touch layer group 5 may include an insulating layer group 5z, which may include at least two insulating layers 5a. The insulating layer group 5z is provided with... A first recessed portion 5z1 is provided, and the orthographic projection of the first recessed portion 5z1 on the display back panel 10 at least partially overlaps with the first sub-pixel 351; a first filter layer 61 is provided on the light-emitting side of the display back panel 10, and at least a portion of the first filter layer 61 is located within the first recessed portion 5z1, and the refractive index of the first filter layer 61 is greater than the refractive index of the insulating layer 5a on which the first recessed portion 5z1 is provided; a second filter layer 62 is provided on the light-emitting side of the display back panel 10, and the refractive index of the second filter layer 62 is different from the refractive index of the first filter layer 61.

[0106] The insulating layer group 5z has a second recessed portion 5z2. The orthographic projection of the second recessed portion 5z2 onto the display back panel 10 at least partially overlaps with the second sub-pixel 352. At least a portion of the second filter layer 62 is located within the second recessed portion 5z2. The refractive index of the second filter layer 62 is greater than the refractive index of the insulating layer 5a on which the second recessed portion 5z2 is disposed. The total internal reflection surface area of ​​the recessed portion corresponding to the one with the larger refractive index between the first filter layer 61 and the second filter layer 62 is smaller. Alternatively, the insulating layer group 5z may include a second protrusion 5z6. The orthographic projection of the second protrusion 5z6 on the display back panel 10 at least partially overlaps with the second sub-pixel 352. The second filter layer 62 is disposed on the side of the second protrusion 5z6 away from the display back panel 10 and covers at least part of the sidewall of the second protrusion 5z6. The refractive index of the second filter layer 62 is less than the refractive index of the second protrusion 5z6. The distance between the first recess 5z1 or the side of the second protrusion 5z6 near the display back panel 10 corresponding to the one with the larger refractive index of the first filter layer 61 and the second filter layer 62 and the display back panel 10 is small.

[0107] In this disclosed display panel, on the one hand, when light travels from the first filter layer 61 to the sidewall of the first recess 5z1, it travels from an optically denser medium to an optically less dense medium. Therefore, total internal reflection easily occurs at the interface between the first filter layer 61 and the sidewall of the first recess 5z1. The sidewall of the first recess 5z1 causes the tilted outgoing light to undergo total internal reflection, changing the angle of the outgoing light and thus converging the total internally reflected light, which then exits from the front of the display panel, improving the light emission efficiency of the front of the display panel. On the other hand, when light travels from the second filter layer 62 to the sidewall of the second recess 5z2, it travels from an optically denser medium to an optically less dense medium. Therefore, at the interface between the second filter layer 62 and the sidewall of the second recess 5z2... Total internal reflection is easily achieved. The sidewall of the second recess 5z2 causes the tilted outgoing light to undergo total internal reflection, changing the angle of the outgoing light and making the total internal reflection light more focused, so that it is emitted from the front of the display panel, improving the light emission efficiency of the front of the display panel. Alternatively, the sidewall of the second protrusion 5z6 can adjust the incident angle of the light emitted from the second sub-pixel 352 at the interface between the second protrusion 5z6 and the second filter layer 62, making the incident angle smaller. Refraction occurs at the interface between the second protrusion 5z6 and the second filter layer 62. After refraction at the interface between the second protrusion 5z6 and the second filter layer 62, the outgoing light is deflected towards the normal viewing angle, thereby improving the light emission efficiency.

[0108] On the other hand, the total reflection surface area of ​​the recess corresponding to the one with the higher refractive index in the first filter layer 61 and the second filter layer 62 is small; or, the distance between the side of the first recess 5z1 or the second protrusion 5z6 corresponding to the one with the higher refractive index in the first filter layer 61 and the display back panel 10 and the display back panel 10 is small. That is, the first sub-pixel 351 and the second sub-pixel 352 improve the light extraction efficiency in different ways, which can reduce or even avoid the color shift caused by the different light extraction efficiency gains of sub-pixels 35 of different colors due to the different refractive indices of the filter layers. This makes the light extraction efficiency of the first sub-pixel 351 and the second sub-pixel 352 effectively improved, thereby improving the light extraction efficiency of the display panel.

[0109] On the other hand, when the ambient light is strong, after the ambient light passes through the first filter layer 61, only one color of light enters the display panel. After being reflected by the display panel, only that one color of light exits the display panel. After the ambient light passes through the second filter layer 62, only another color of light enters the display panel. After being reflected by the display panel, only that other color of light exits the display panel, thus achieving the purpose of anti-glare.

[0110] The display back panel 10 can be an OLED (Organic Electroluminescence Display) display back panel 10, a QLED (Quantum Dot Light Emitting Diodes) display back panel 10, etc.; the display back panel 10 has a light-emitting side and a non-light-emitting side, which are arranged opposite to each other. The light-emitting side can display the image, and the side displaying the image is the display surface.

[0111] The following explanation uses the OLED display back panel 10 as an example.

[0112] In this exemplary embodiment, referring to FIG37, the display backplane 10 may include a substrate 1. The material of the substrate 1 may include inorganic materials, such as glass, quartz, or metal. The material of the substrate 1 may also include organic materials, such as resins like polyimide, polycarbonate, polyacrylate, polyetherimide, polyethersulfone, polyethylene terephthalate, and polyethylene naphthalate. The substrate 1 may be formed from multiple material layers; for example, the substrate 1 may include multiple substrate layers, and the material of the substrate layers may be any of the aforementioned materials. Of course, the substrate 1 may also be a single layer, and may be any of the aforementioned materials.

[0113] Referring to FIG37, the display back panel 10 may further include a driving substrate 2 and a light-emitting substrate 3. The driving substrate 2 is disposed on one side of the substrate 1, and the light-emitting substrate 3 is disposed on the side of the driving substrate 2 opposite to the substrate 1. The driving substrate 2 may include multiple driving circuits arranged in an array, and the light-emitting substrate 3 may include multiple light-emitting devices arranged in an array. The driving circuits can drive the light-emitting devices to emit light.

[0114] Specifically, referring to Figure 37, a shielding layer 21 can be provided on one side of the substrate 1. Light rays entering the active layer from the substrate 1 will generate photogenerated carriers in the active layer, which will have a significant impact on the characteristics of the thin-film transistor and ultimately affect the display quality of the display device. The shielding layer 21 can block the light rays entering from the substrate 1, thereby avoiding the impact on the characteristics of the thin-film transistor and the display quality of the display device. Depending on the type of thin-film transistor, the shielding layer 21 can be omitted.

[0115] A buffer layer 22 can also be formed on the side of the shielding layer 21 facing away from the substrate 1. The buffer layer 22 serves to block moisture and impurity ions in the substrate 1 (especially organic materials) and to increase hydrogen ions for the subsequently formed active layer. The buffer layer 22 is made of an insulating material to insulate the shielding layer 21 from the active layer. The buffer layer 22 may include silicon nitride, silicon oxide, or silicon oxynitride. Depending on the type of substrate 1 or the process conditions, the buffer layer 22 may be omitted.

[0116] An active layer is provided on the side of the buffer layer 22 facing away from the substrate 1. The active layer may include a channel portion 231 and conductor portions disposed at both ends of the channel portion 231. One of the two conductor portions is a source connection portion 232, and the other is a drain connection portion 233. A gate insulating layer 24 is provided on the side of the active layer facing away from the substrate 1. A gate layer 25 is provided on the side of the gate insulating layer 24 facing away from the substrate 1. The gate layer 25 may include a gate 251 and a gate line (not shown in the figure).

[0117] An interlayer dielectric layer 26 is provided on the side of the gate layer 25 facing away from the substrate 1. A connection via is provided on the interlayer dielectric layer 26, which connects to the source connection portion 232 and the drain connection portion 233. A first connection conductor layer 27 is provided on the side of the interlayer dielectric layer 26 facing away from the substrate 1. The first connection conductor layer 27 may include a source 271, a drain 272, and a data line (not shown in the figure). The data line may be connected to the source 271, or a part of the data line may be used as the source 271. The source 271 is connected to the source connection portion 232 through the connection via on the interlayer dielectric layer 26, and the drain 272 is connected to the drain connection portion 233 through the connection via on the interlayer dielectric layer 26.

[0118] In some other exemplary embodiments of this disclosure, a passivation layer is provided on the side of the first connection conductor layer 27 facing away from the substrate 1, and a connection via is also provided on the passivation layer; a second connection conductor layer is provided on the side of the passivation layer facing away from the substrate 1, and the second connection conductor layer may include a second source 271 and / or a second drain 272, and the second source 271 and the second drain 272 are respectively connected to the source 271 and the drain 272 through the connection via on the passivation layer. Of course, a third connection conductor layer, a fourth connection conductor layer, etc., may also be provided as needed.

[0119] Referring to Figure 37, a first planarization layer 28 is provided on the side of the first interconnecting conductor layer 27 facing away from the substrate 1. A connection via is provided on the first planarization layer 28, and the connection via is connected to the drain 272. The channel portion 231, the gate 251, the source 271, and the drain 272 form a thin-film transistor.

[0120] It should be noted that the thin-film transistor described in this specification is a top-gate thin-film transistor. In other exemplary embodiments of this disclosure, the thin-film transistor may also be a bottom-gate or dual-gate type, and its specific structure will not be described in detail here. Moreover, in cases where thin-film transistors with opposite polarities are used or where the current direction changes during circuit operation, the functions of "source 271" and "drain 272" are sometimes interchanged. Therefore, in this specification, "source 271" and "drain 272" can be interchanged.

[0121] Please refer to Figure 37. A light-emitting substrate 3 is disposed on the side of the first planarization layer 28 away from the substrate 1. The light-emitting substrate 3 may include a first electrode 31, a pixel definition layer 32, a light-emitting layer group 33, and a second electrode 34.

[0122] Specifically, a first electrode 31 is provided on the side of the first planarization layer 28 away from the substrate 1. The first electrode 31 is connected to the drain 272 of the driving backplate through a connecting via. The drain 272 provides a driving signal to the first electrode 31. The first electrode 31 can be an anode (pixel electrode).

[0123] A pixel definition layer 32 is provided on the side of the first electrode 31 facing away from the substrate 1. Referring to FIG37, the pixel definition layer 32 has an opening 321 that connects to the first electrode 31, so that at least a portion of the first electrode 31 is not covered by the pixel definition layer 32. The pixel definition layer 32 can be made of a black material capable of absorbing photons, for example, the material of the pixel definition layer 32 can be black ink; the pixel definition layer 32 can absorb stray light and improve the display effect.

[0124] A light-emitting layer group 33 is provided at least on the side of the first electrode 31 facing away from the substrate 1, that is, at least a portion of the light-emitting layer group 33 is located within the opening 321 and connected to the first electrode 31. A second electrode 34 is provided on the side of the light-emitting layer group 33 facing away from the substrate 1, and the second electrode 34 may be a cathode (common electrode). The light-emitting layer group 33 within one opening 321 emits light to form a sub-pixel 35, such that the orthographic projection of the sub-pixel 35 onto the substrate 1 is the orthographic projection of the light-emitting layer group 33 within the opening 321 onto the substrate 1.

[0125] It should be noted that since the sidewall of the opening 321 of the pixel definition layer 32 is inclined, the sub-pixel 35 refers to the range of the bottom wall of the opening 321 of the pixel definition layer 32. In other words, the sub-pixel 35 refers to the range defined by the edge of the opening 321 of the pixel definition layer 32 near the substrate 1.

[0126] The display backplane 10 may include a plurality of sub-pixels 35. Specifically, the display backplane 10 may include a plurality of first sub-pixels 351, a plurality of second sub-pixels 352, and a plurality of third sub-pixels 353. The first sub-pixels 351 may be red sub-pixels, that is, the first sub-pixels 351 may emit red light; the second sub-pixels 352 may be green sub-pixels, that is, the second sub-pixels 352 may emit green light; and the third sub-pixels 353 may be blue sub-pixels, that is, the third sub-pixels 353 may emit blue light. Of course, in some other exemplary embodiments of this disclosure, the display backplane 10 may include a plurality of fourth sub-pixels, which may be white sub-pixels, that is, the fourth sub-pixels may emit white light; or the first sub-pixels 351, the second sub-pixels 352, and the third sub-pixels 353 may all emit white light, and then be filtered by a red filter layer, a green filter layer, and a blue filter layer.

[0127] It should be noted that the limitation on the emission color of each sub-pixel 35 is only an example. This disclosure does not make specific limitations on the emission color of each sub-pixel 35. The following explanation uses the first sub-pixel 351, the second sub-pixel 352, and the third sub-pixel 353 as examples, corresponding to the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B, respectively.

[0128] The light-emitting layer group 33 may include a hole injection layer, a hole transport layer, an organic light-emitting layer, an electron transport layer, and an electron injection layer stacked sequentially. The hole injection layer is in contact with the first electrode 31, and the electron injection layer is in contact with the second electrode 34. Of course, in other exemplary embodiments of this disclosure, the light-emitting layer group 33 may only include a hole transport layer, a light-emitting layer, and an electron transport layer. The light-emitting layer group 33 may also have other structures, and its specific structure can be set as needed.

[0129] Holes are injected into the organic light-emitting layer from the first electrode 31 side, and electrons are injected into the organic light-emitting layer from the second electrode 34 side. Finally, holes and electrons recombine in the organic light-emitting layer to generate excitons. When the generated excitons relax from the excited state to the ground state, the OLED emits visible light.

[0130] The display backplane 10 may further include an encapsulation layer group 4, which is disposed on the side of the light-emitting substrate 3 facing away from the substrate 1. For example, the encapsulation layer group 4 may include a first inorganic layer 41, an organic layer 42, and a second inorganic layer 43. The first inorganic layer 41 is disposed on the side of the second electrode 34 facing away from the substrate 1. The material of the first inorganic layer 41 may be silicon nitride (SiNx) or silicon oxynitride (SiNO), etc., and the first inorganic layer 41 can be formed on the side of the second electrode 34 facing away from the substrate 1 by chemical vapor deposition (CVD). The organic layer 42 is disposed on the side of the first inorganic layer 41 facing away from the substrate 1, and the material of the organic layer 42 may be acrylic, epoxide, or other organic materials. The second inorganic layer 43 is disposed on the side of the organic layer 42 facing away from the substrate 1. The material of the second inorganic layer 43 can be silicon nitride (SiNx) or silicon oxynitride (SiNO), etc. The second inorganic layer 43 can be formed on the side of the organic layer 42 facing away from the substrate 1 by chemical vapor deposition (CVD). The light-emitting layer 33 can be encapsulated by the encapsulation layer group 4 to isolate it from corrosion by water / oxygen in the air.

[0131] In some exemplary embodiments of this disclosure, referring to FIG37, the display panel may further include a touch layer group 5, which is disposed on the side of the encapsulation layer group 4 away from the substrate 1, that is, the touch layer group 5 is disposed on the light-emitting side of the display back panel 10, and the touch layer group 5 enables the display panel to realize touch function.

[0132] Referring to Figures 1-36, the touch layer group 5 may include an insulating layer group 5z, which may include at least two insulating layers 5a stacked sequentially. Specifically, the touch layer group 5 may include a base layer 51, a first touch functional layer 52, a touch insulating layer 53, and a second touch functional layer 54. The base layer 51 is disposed on the side of the encapsulation layer group 4 away from the substrate 1, the first touch functional layer 52 is disposed on the side of the base layer 51 away from the substrate 1, the touch insulating layer 53 is disposed on the side of the first touch functional layer 52 away from the substrate 1, and the second touch functional layer 54 is disposed on the side of the touch insulating layer 53 away from the substrate 1. The touch layer group 5 may also include a protective layer 55, which is disposed on the side of the second touch functional layer 54 away from the substrate 1, and the protective layer 55 can protect the second touch functional layer 54. In this case, the insulating layer group 5z may include a base layer 51, a touch insulating layer 53, and a protective layer 55, where the base layer 51, the touch insulating layer 53, and the protective layer 55 are all insulating layers 5a. Generally, the second touch functional layer 54 may include multiple arrayed touch electrodes 541, and the first touch functional layer 52 may include multiple bridging portions 521. The bridging portions 521 can connect a portion of two adjacent touch electrodes 541 through connection vias provided on the touch insulating layer 53.

[0133] The substrate layer 51, the touch insulating layer 53, and the protective layer 55 are all made of organic materials. For example, the substrate layer 51, the touch insulating layer 53, and the protective layer 55 can be made of epoxy resin, acrylic, etc. This arrangement ensures that the thickness of the substrate layer 51, the touch insulating layer 53, and the protective layer 55 meets the thickness requirements for setting the first filter layer 61, the second filter layer 62, and the third filter layer 63, and also meets the thickness requirements for setting the first recess, the second recess, and the third recess, or the thickness requirements for setting the first recess, the second protrusion, and the third protrusion. Moreover, the refractive index of organic materials is easy to adjust, so that the refractive index of the substrate layer 51, the touch insulating layer 53, and the protective layer 55 can meet the requirements. Furthermore, the etching process of organic materials has high precision, which can meet the morphological requirements of the first recess, the second recess, and the third recess, or the morphological requirements for setting the first recess, the second protrusion, and the third protrusion.

[0134] Of course, in some other example embodiments of this disclosure, the touch layer group 5 may also include a base layer 51, a first touch function layer 52 and a touch insulating layer 53. In this case, the insulating layer group 5z may include a base layer 51 and a touch insulating layer 53, both of which are insulating layers 5a.

[0135] Referring to Figures 1–27, a first recess 5z1 is provided on the insulating layer group 5z, and the orthographic projection of the first recess 5z1 on the display back panel 10 at least partially overlaps with the first sub-pixel 351. A second recess 5z2 is provided on the insulating layer group 5z, and the orthographic projection of the second recess 5z2 on the display back panel 10 at least partially overlaps with the second sub-pixel 352.

[0136] The orthographic projection of the first recessed portion 5z1 on the display back panel 10 at least partially overlaps with the first sub-pixel 351. For example, the edge line of the orthographic projection of the first recessed portion 5z1 on the display back panel 10 may coincide with the edge line of the first sub-pixel 351, or the orthographic projection of the first recessed portion 5z1 on the display back panel 10 may cover and be larger than the first sub-pixel 351. In both cases, the orthographic projection of the first recessed portion 5z1 on the display back panel 10 completely covers the first sub-pixel 351.

[0137] Of course, in some other example embodiments of this disclosure, a portion of the orthographic projection of the first recess 5z1 onto the display back panel 10 may overlap with a portion of the first sub-pixel 351.

[0138] The first recessed portion 5z1 may include a side wall and a bottom wall, with the bottom wall parallel to the display surface and the side wall intersecting the display surface. It should be noted that since the side wall of the first recessed portion 5z1 is inclined, when compared with the first sub-pixel 351, the range of the orthographic projection of the first recessed portion 5z1 on the display back panel 10 refers to the orthographic projection of the side of the first recessed portion 5z1 closest to the display back panel 10 (the bottom wall) on the display back panel 10. That is, the orthographic projection of the bottom wall of the first recessed portion 5z1 on the display back panel 10 at least partially overlaps with the first sub-pixel 351. This ensures that even when the orthographic projection of the first recessed portion 5z1 on the display back panel 10 completely covers the first sub-pixel 351, the side wall of the first recessed portion 5z1 does not overlap with the first sub-pixel 351, further ensuring the convergence of light and the uniformity of light.

[0139] The orthographic projection of the second recessed portion 5z2 on the display back panel 10 at least partially overlaps with the second sub-pixel 352. For example, the edge line of the orthographic projection of the second recessed portion 5z2 on the display back panel 10 may coincide with the edge line of the second sub-pixel 352, or the orthographic projection of the second recessed portion 5z2 on the display back panel 10 may cover and be larger than the second sub-pixel 352. In both cases, the orthographic projection of the second recessed portion 5z2 on the display back panel 10 completely covers the second sub-pixel 352.

[0140] Of course, in some other example embodiments of this disclosure, a portion of the orthographic projection of the second recess 5z2 onto the display back panel 10 may overlap with a portion of the second sub-pixel 352.

[0141] The second recessed portion 5z2 may include a side wall and a bottom wall, with the bottom wall parallel to the display surface and the side wall intersecting the display surface. It should be noted that since the side wall of the second recessed portion 5z2 is inclined, when compared with the second sub-pixel 352, the range of the orthographic projection of the second recessed portion 5z2 on the display back panel 10 refers to the orthographic projection of the side of the second recessed portion 5z2 closest to the display back panel 10 (the bottom wall) on the display back panel 10. That is, the orthographic projection of the bottom wall of the second recessed portion 5z2 on the display back panel 10 at least partially overlaps with the second sub-pixel 352. This ensures that even when the orthographic projection of the second recessed portion 5z2 on the display back panel 10 completely covers the second sub-pixel 352, the side wall of the second recessed portion 5z2 does not overlap with the second sub-pixel 352, further ensuring the convergence of light and the uniformity of light.

[0142] Referring to Figure 1, a first filter layer 61 is disposed on the light-emitting side of the display back panel 10. At least a portion of the first filter layer 61 is located within the first recess 5z1. For example, a portion of the first filter layer 61 may be located within the first recess 5z1, or the entire first filter layer 61 may be located within the first recess 5z1. Generally, the thickness of the first filter layer 61 may be greater than or equal to the depth of the first recess 5z1, completely filling the first recess 5z1. The first filter layer 61 may be a red filter layer, meaning that the first filter layer 61 can only transmit red light.

[0143] The refractive index of the first filter layer 61 is greater than the refractive index of the insulating layer 5a on which the first recess 5z1 is disposed. Specifically, the refractive index of the first filter layer 61 is greater than or equal to 1.65 and less than or equal to 1.75. For example, the refractive index of the first filter layer 61 can be 1.68, 1.7, 1.73, etc. The refractive index of the insulating layer 5a on which the first recess 5z1 is disposed is greater than or equal to 1.45 and less than or equal to 1.55. For example, the refractive index of the insulating layer 5a on which the first recess 5z1 is disposed can be 1.47, 1.5, 1.53, etc.

[0144] Referring to Figure 1, when light travels from the first filter layer 61 to the insulating layer 5a where the first recess 5z1 is located, it is as if the light is traveling from a denser medium to a less dense medium. Therefore, total internal reflection easily occurs at the interface between the first filter layer 61 and the sidewall of the first recess 5z1. The sidewall of the first recess 5z1 causes the tilted outgoing light to undergo total internal reflection, thus changing the angle of the outgoing light and making the total internal reflection more focused. This allows the light to exit from the front of the display panel, improving the light emission efficiency of the front of the display panel, reducing the light emission efficiency of the sides of the display panel, increasing the privacy protection effect, and reducing display power consumption.

[0145] Moreover, when the ambient light is strong, after the ambient light passes through the first filter layer 61, only red light enters the display panel. After being reflected by the display panel, only red light exits the display panel, thus achieving the purpose of anti-glare.

[0146] The second light filter layer 62 is disposed on the light-emitting side of the display back panel 10. At least a portion of the second light filter layer 62 is located within the second recess 5z2. For example, a portion of the second light filter layer 62 may be located within the second recess 5z2, or the entire second light filter layer 62 may be located within the second recess 5z2. Generally, the thickness of the second light filter layer 62 may be greater than or equal to the depth of the second recess 5z2, completely filling the second recess 5z2. The second light filter layer 62 may be a green light filter layer, meaning that the second light filter layer 62 can only transmit green light.

[0147] The refractive index of the second filter layer 62 is greater than the refractive index of the insulating layer 5a on which the second recess 5z2 is provided. Specifically, the refractive index of the second filter layer 62 is greater than or equal to 1.55 and less than or equal to 1.65. For example, the refractive index of the second filter layer 62 can be 1.58, 1.6, 1.62, etc. The refractive index of the insulating layer 5a on which the second recess 5z2 is provided is greater than or equal to 1.45 and less than or equal to 1.55. For example, the refractive index of the insulating layer 5a on which the second recess 5z2 is provided can be 1.47, 1.5, 1.53, etc.

[0148] Referring to Figure 1, when light travels from the second filter layer 62 to the insulating layer 5a where the second recess 5z2 is located, it travels from a denser medium to a less dense medium. Therefore, total internal reflection easily occurs at the interface between the second filter layer 62 and the sidewall of the second recess 5z2. The sidewall of the second recess 5z2 causes the tilted outgoing light to undergo total internal reflection, changing the angle of the outgoing light and making the total internal reflection more focused. This allows the light to exit from the front of the display panel, improving the light emission efficiency of the front of the display panel, reducing the light emission efficiency of the sides of the display panel, increasing the privacy protection effect, and reducing display power consumption.

[0149] Moreover, when the ambient light is strong, after the ambient light passes through the second filter layer 62, only green light enters the display panel. After being reflected by the display panel, only green light exits the display panel, thus achieving the purpose of anti-glare.

[0150] However, since the refractive index of the second filter layer 62 is different from that of the first filter layer 61, the critical angle for total internal reflection between the first filter layer 61 and the first recess 5z1 is different from that between the second filter layer 62 and the second recess 5z2. This results in different gains in the light emission efficiency of sub-pixels 35 of different colors, leading to color shift.

[0151] In this example embodiment, the total reflection surface area of ​​the recess corresponding to the one with the larger refractive index in the first filter layer 61 and the second filter layer 62 is smaller. Specifically, when the refractive index of the second filter layer 62 is less than that of the first filter layer 61, the total reflection interface of the second recess 5z2 is larger than that of the first recess 5z1. Because the refractive index of the second filter layer 62 is lower than that of the first filter layer 61, the critical angle for total internal reflection between the first filter layer 61 and the first recess 5z1 is smaller, resulting in more light undergoing total internal reflection. In contrast, the critical angle for total internal reflection between the second filter layer 62 and the second recess 5z2 is larger, resulting in less light undergoing total internal reflection. Consequently, the light extraction efficiency of the second sub-pixel 352 is lower. The total internal reflection interface of the second recess 5z2 is larger than that of the first recess 5z1, thereby increasing the amount of light undergoing total internal reflection between the second filter layer 62 and the second recess 5z2, thus improving the light extraction efficiency of the second sub-pixel 352 and compensating for the lower refractive index of the second filter layer 62.

[0152] Of course, in some other exemplary embodiments of this disclosure, the refractive index of the second filter layer 62 may be greater than that of the first filter layer 61. In this case, the total internal reflection interface of the second recess 5z2 is smaller than that of the first recess 5z1. Because the refractive index of the second filter layer 62 is greater than that of the first filter layer 61, the critical angle for total internal reflection between the second filter layer 62 and the second recess 5z2 is smaller, resulting in more light undergoing total internal reflection. In contrast, the critical angle for total internal reflection between the first filter layer 61 and the first recess 5z1 is larger, resulting in less light undergoing total internal reflection. The total internal reflection interface of the first recess 5z1 is larger than that of the second recess 5z2, thereby increasing the amount of light undergoing total internal reflection between the first filter layer 61 and the first recess 5z1, thus improving the light extraction efficiency of the first sub-pixel 351 and compensating for the lower refractive index of the first filter layer 61.

[0153] In some exemplary embodiments of this disclosure, referring to FIG1, a third recess 5z3 is provided on the insulating layer group 5z, and the orthographic projection of the third recess 5z3 on the display back panel 10 at least partially overlaps with the third sub-pixel 353.

[0154] The orthographic projection of the third recessed portion 5z3 on the display back panel 10 at least partially overlaps with the third sub-pixel 353. For example, the edge line of the orthographic projection of the third recessed portion 5z3 on the display back panel 10 may coincide with the edge line of the third sub-pixel 353, or the orthographic projection of the third recessed portion 5z3 on the display back panel 10 may cover and be larger than the third sub-pixel 353. In both cases, the orthographic projection of the third recessed portion 5z3 on the display back panel 10 completely covers the third sub-pixel 353.

[0155] Of course, in some other example embodiments of this disclosure, a portion of the orthographic projection of the third recess 5z3 onto the display back panel 10 may overlap with a portion of the third sub-pixel 353.

[0156] The third recess 5z3 may include a side wall and a bottom wall, with the bottom wall parallel to the display surface and the side wall intersecting the display surface. It should be noted that since the side wall of the third recess 5z3 is inclined, when compared with the third sub-pixel 353, the orthographic projection range of the third recess 5z3 on the display back panel 10 refers to the orthographic projection of the side of the third recess 5z3 closest to the display back panel 10 (the bottom wall) on the display back panel 10. That is, the orthographic projection of the bottom wall of the third recess 5z3 on the display back panel 10 at least partially overlaps with the third sub-pixel 353. This ensures that even when the orthographic projection of the third recess 5z3 on the display back panel 10 completely covers the third sub-pixel 353, the side wall of the third recess 5z3 does not overlap with the third sub-pixel 353, further ensuring the convergence of light and the uniformity of light.

[0157] The third light filter layer 63 is disposed on the light-emitting side of the display back panel 10. At least a portion of the third light filter layer 63 is located within the third recess 5z3. For example, a portion of the third light filter layer 63 may be located within the third recess 5z3, or the entire third light filter layer 63 may be located within the third recess 5z3. Generally, the thickness of the third light filter layer 63 may be greater than or equal to the depth of the third recess 5z3, completely filling the third recess 5z3. The third light filter layer 63 may be a blue light filter layer, meaning that the third light filter layer 63 can only transmit blue light.

[0158] It should be noted that the above-mentioned limitations on the filter colors of each filter layer are only illustrative examples. This disclosure does not specifically limit the filter colors of each filter layer. The specific implementation is illustrated by taking the first filter layer 61, the second filter layer 62, and the third filter layer 63 as red filter layer, green filter layer, and blue filter layer, respectively.

[0159] The refractive index of the third filter layer 63 is greater than the refractive index of the insulating layer 5a on which the third recess 5z3 is provided. Specifically, the refractive index of the third filter layer 63 is greater than or equal to 1.55 and less than or equal to 1.65. For example, the refractive index of the third filter layer 63 can be 1.58, 1.6, 1.62, etc. The refractive index of the insulating layer 5a on which the third recess 5z3 is provided is greater than or equal to 1.45 and less than or equal to 1.55. For example, the refractive index of the insulating layer 5a on which the second recess 5z2 is provided can be 1.47, 1.5, 1.53, etc.

[0160] Referring to Figure 1, when light travels from the third filter layer 63 to the insulating layer 5a where the third recess 5z3 is located, it is as if the light is traveling from a denser medium to a less dense medium. Therefore, total internal reflection easily occurs at the interface between the third filter layer 63 and the sidewall of the third recess 5z3. The sidewall of the third recess 5z3 causes the tilted outgoing light to undergo total internal reflection, thus changing the angle of the outgoing light and making the total internal reflection more focused. This allows the light to exit from the front of the display panel, improving the light emission efficiency of the front of the display panel, reducing the light emission efficiency of the sides of the display panel, increasing the privacy protection effect, and reducing display power consumption.

[0161] Moreover, when the ambient light is strong, after the ambient light passes through the third filter layer 63, only blue light enters the display panel. After being reflected by the display panel, only blue light exits the display panel, thus achieving the purpose of anti-glare.

[0162] However, since the refractive index of the third filter layer 63 is different from that of the first filter layer 61, the critical angle for total internal reflection between the first filter layer 61 and the first recess 5z1 is different from that between the third filter layer 63 and the third recess 5z3. This results in different gains in the light emission efficiency of sub-pixels 35 of different colors, leading to color shift.

[0163] In this example embodiment, the total reflection surface area of ​​the recess corresponding to the one with the larger refractive index of the first filter layer 61 and the third filter layer 63 is smaller. Specifically, when the refractive index of the third filter layer 63 is less than that of the first filter layer 61, the total reflection interface of the third recess 5z3 is larger than that of the first recess 5z1. Because the refractive index of the third filter layer 63 is lower than that of the first filter layer 61, the critical angle for total internal reflection between the first filter layer 61 and the first recess 5z1 is smaller, resulting in more light undergoing total internal reflection. However, the critical angle for total internal reflection between the third filter layer 63 and the third recess 5z3 is larger, resulting in less light undergoing total internal reflection. This leads to a lower light extraction efficiency for the third sub-pixel 353. The total internal reflection interface of the third recess 5z3 is larger than that of the first recess 5z1, thereby increasing the amount of light undergoing total internal reflection between the third filter layer 63 and the third recess 5z3, thus improving the light extraction efficiency of the third sub-pixel 353 and compensating for the lower refractive index of the third filter layer 63.

[0164] Of course, in some other exemplary embodiments of this disclosure, the refractive index of the third filter layer 63 may be greater than that of the first filter layer 61. In this case, the total internal reflection interface of the third recess 5z3 is smaller than that of the first recess 5z1. Because the refractive index of the third filter layer 63 is greater than that of the first filter layer 61, the critical angle for total internal reflection between the third filter layer 63 and the third recess 5z3 is smaller, resulting in more light undergoing total internal reflection. In contrast, the critical angle for total internal reflection between the first filter layer 61 and the first recess 5z1 is larger, resulting in less light undergoing total internal reflection. The total internal reflection interface of the first recess 5z1 is larger than that of the third recess 5z3, thereby increasing the amount of light undergoing total internal reflection between the first filter layer 61 and the first recess 5z1, thus improving the light extraction efficiency of the first sub-pixel 351 and compensating for the lower refractive index of the first filter layer 61.

[0165] Referring to Figures 1-27, the first recess 5z1, the second recess 5z2, and the third recess 5z3 can be provided on the same insulating layer 5a.

[0166] Referring to Figures 1-13, a first recess 5z1, a second recess 5z2, and a third recess 5z3 are provided on an insulating layer 5a. For example, referring to Figures 1-3, the first recess 5z1, the second recess 5z2, and the third recess 5z3 can be provided on a substrate layer 51. The specific process is as follows: the substrate layer 51 is prepared and patterned to form the first recess 5z1, the second recess 5z2, and the third recess 5z3. Then, the first filter layer 61, the second filter layer 62, the third filter layer 63, the first touch functional layer 52, the touch insulating layer 53, the second touch functional layer 54, and the protective layer 55 are prepared sequentially.

[0167] The first filter layer 61, the second filter layer 62, and the third filter layer 63 do not completely cover the top surface of the substrate 51 facing away from the display back panel 10. Specifically, the annular width of the portion of the first filter layer 61 overlapping with the side of the substrate 51 facing away from the display back panel 10 is greater than or equal to 0 and less than or equal to 2 micrometers. For example, the annular width of the portion of the first filter layer 61 overlapping with the side of the substrate 51 facing away from the display back panel 10 can be 0.3 micrometers, 0.5 micrometers, 0.8 micrometers, 1 micrometer, 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, etc. The annular width of the portion of the second filter layer 62 overlapping with the side of the substrate 51 facing away from the display back panel 10 is greater than or equal to 0 and less than or equal to 2 micrometers. For example, the annular width of the portion of the second filter layer 62 overlapping with the side of the substrate 51 facing away from the display back panel 10 can be 0.3 micrometers, 0.5 micrometers, 0.8 micrometers, 1 micrometer, 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, etc. The ring width of the portion of the third filter layer 63 that overlaps with the side of the substrate 51 that is away from the display backplate 10 is greater than or equal to 0 and less than or equal to 2 micrometers. For example, the ring width of the portion of the third filter layer 63 that overlaps with the side of the substrate 51 that is away from the display backplate 10 can be 0.3 micrometers, 0.5 micrometers, 0.8 micrometers, 1 micrometer, 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, etc.

[0168] Referring to Figures 4-8, the first recess 5z1, the second recess 5z2, and the third recess 5z3 can be disposed on the touch insulating layer 53. The specific process is as follows: a base layer 51, a first touch functional layer 52, and a touch insulating layer 53 are sequentially prepared, and the touch insulating layer 53 is patterned to form the first recess 5z1, the second recess 5z2, and the third recess 5z3. Then, a first filter layer 61, a second filter layer 62, a third filter layer 63, a second touch functional layer 54, and a protective layer 55 are sequentially prepared.

[0169] The first filter layer 61, the second filter layer 62, and the third filter layer 63 do not completely cover the top surface of the touch insulating layer 53 facing away from the display back panel 10. Specifically, the circumferential width of the overlapping portion of the first filter layer 61 and the touch insulating layer 53 facing away from the display back panel 10 is greater than or equal to 0 and less than or equal to 2 micrometers. For example, the circumferential width of the overlapping portion of the first filter layer 61 and the touch insulating layer 53 facing away from the display back panel 10 can be 0.3 micrometers, 0.5 micrometers, 0.8 micrometers, 1 micrometer, 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, etc. The annular width of the portion of the second filter layer 62 overlapping with the touch insulating layer 53 on the side facing away from the display back panel 10 is greater than or equal to 0 and less than or equal to 2 micrometers. For example, the annular width of the portion of the second filter layer 62 overlapping with the touch insulating layer 53 on the side facing away from the display back panel 10 can be 0.3 micrometers, 0.5 micrometers, 0.8 micrometers, 1 micrometer, 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, etc. The annular width of the portion of the third filter layer 63 overlapping with the touch insulating layer 53 on the side facing away from the display back panel 10 is greater than or equal to 0 and less than or equal to 2 micrometers. For example, the annular width of the portion of the third filter layer 63 overlapping with the touch insulating layer 53 on the side facing away from the display back panel 10 can be 0.3 micrometers, 0.5 micrometers, 0.8 micrometers, 1 micrometer, 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, etc.

[0170] Referring to Figures 9-13, the first recess 5z1, the second recess 5z2, and the third recess 5z3 can be disposed on the protective layer 55. The specific process is as follows: a base layer 51, a first touch functional layer 52, a touch insulating layer 53, a second touch functional layer 54, and a protective layer 55 are sequentially formed; the protective layer 55 is patterned to form the first recess 5z1, the second recess 5z2, and the third recess 5z3; and then a first filter layer 61, a second filter layer 62, and a third filter layer 63 are sequentially formed.

[0171] The first filter layer 61, the second filter layer 62, and the third filter layer 63 do not completely cover the top surface of the protective layer 55 facing away from the display back panel 10. Specifically, the circumferential width of the overlapping portion of the first filter layer 61 and the protective layer 55 facing away from the display back panel 10 is greater than or equal to 0 and less than or equal to 2 micrometers. For example, the circumferential width of the overlapping portion of the first filter layer 61 and the protective layer 55 facing away from the display back panel 10 can be 0.3 micrometers, 0.5 micrometers, 0.8 micrometers, 1 micrometer, 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, etc. The circumferential width of the overlapping portion of the second filter layer 62 and the protective layer 55 facing away from the display back panel 10 is greater than or equal to 0 and less than or equal to 2 micrometers. For example, the circumferential width of the overlapping portion of the second filter layer 62 and the protective layer 55 facing away from the display back panel 10 can be 0.3 micrometers, 0.5 micrometers, 0.8 micrometers, 1 micrometer, 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, etc. The circumference of the overlapping portion of the third filter layer 63 and the protective layer 55 on the side away from the display backplate 10 is greater than or equal to 0 and less than or equal to 2 micrometers. For example, the circumference of the overlapping portion of the third filter layer 63 and the protective layer 55 on the side away from the display backplate 10 can be 0.3 micrometers, 0.5 micrometers, 0.8 micrometers, 1 micrometer, 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, etc.

[0172] Referring to Figures 14-27, a first recessed portion 5z1, a second recessed portion 5z2, and a third recessed portion 5z3 are provided on two adjacent insulating layers 5a; for example, referring to Figures 14-20, the first recessed portion 5z1, the second recessed portion 5z2, and the third recessed portion 5z3 can be provided on the base layer 51 and the touch insulating layer 53. Specifically, a first sub-recessed portion 5z11, a second sub-recessed portion 5z21, and a third sub-recessed portion 5z31 can be provided on the base layer 51, and a fourth sub-recessed portion 5z12, a fifth sub-recessed portion 5z22, and a sixth sub-recessed portion 5z32 can be provided on the touch insulating layer 53. The first sub-recessed portion 5z11 and the fourth sub-recessed portion 5z12 communicate to form the first recessed portion 5z1, that is, the first recessed portion 5z1 can include the interconnected fourth sub-recessed portion 5z12 and the first sub-recessed portion 5z11; The second recessed portion 5z21 and the fifth recessed portion 5z22 are connected to form the second recessed portion 5z2, that is, the second recessed portion 5z2 may include the interconnected fifth recessed portion 5z22 and the second recessed portion 5z21; the third recessed portion 5z31 and the sixth recessed portion 5z32 are connected to form the third recessed portion 5z3, that is, the third recessed portion 5z3 includes the interconnected sixth recessed portion 5z32 and the third recessed portion 5z31; the specific process is as follows: a base layer 51, a first touch functional layer 52, and a touch insulating layer 53 are sequentially prepared, and the touch insulating layer 53 and the base layer 51 are patterned to form the first recessed portion 5z1, the second recessed portion 5z2, and the third recessed portion 5z3, and then a first filter layer 61, a second filter layer 62, a third filter layer 63, a second touch functional layer 54, and a protective layer 55 are sequentially prepared.

[0173] The first filter layer 61, the second filter layer 62, and the third filter layer 63 do not completely cover the top surface of the touch insulating layer 53 facing away from the display back panel 10. Specifically, the circumferential width of the overlapping portion of the first filter layer 61 and the touch insulating layer 53 facing away from the display back panel 10 is greater than or equal to 0 and less than or equal to 2 micrometers. For example, the circumferential width of the overlapping portion of the first filter layer 61 and the touch insulating layer 53 facing away from the display back panel 10 can be 0.3 micrometers, 0.5 micrometers, 0.8 micrometers, 1 micrometer, 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, etc. The annular width of the portion of the second filter layer 62 overlapping with the touch insulating layer 53 on the side facing away from the display back panel 10 is greater than or equal to 0 and less than or equal to 2 micrometers. For example, the annular width of the portion of the second filter layer 62 overlapping with the touch insulating layer 53 on the side facing away from the display back panel 10 can be 0.3 micrometers, 0.5 micrometers, 0.8 micrometers, 1 micrometer, 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, etc. The annular width of the portion of the third filter layer 63 overlapping with the touch insulating layer 53 on the side facing away from the display back panel 10 is greater than or equal to 0 and less than or equal to 2 micrometers. For example, the annular width of the portion of the third filter layer 63 overlapping with the touch insulating layer 53 on the side facing away from the display back panel 10 can be 0.3 micrometers, 0.5 micrometers, 0.8 micrometers, 1 micrometer, 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, etc.

[0174] Referring to Figures 21-27, the first recessed portion 5z1, the second recessed portion 5z2, and the third recessed portion 5z3 can be disposed on the touch insulating layer 53 and the protective layer 55. Specifically, the first sub-recessed portion 5z11, the second sub-recessed portion 5z21, and the third sub-recessed portion 5z31 can be disposed on the touch insulating layer 53, and the fourth sub-recessed portion 5z12, the fifth sub-recessed portion 5z22, and the sixth sub-recessed portion 5z32 can be disposed on the protective layer 55. The first sub-recessed portion 5z11 and the fourth sub-recessed portion 5z12 communicate to form the first recessed portion 5z1. That is, the first recessed portion 5z1 may include the fourth sub-recessed portion 5z12 and the first sub-recessed portion 5z11 that are interconnected; the second sub-recessed portion 5z21 and the fifth sub-recessed portion 5z22 are connected to form the second recessed portion 5z2, that is, the second recessed portion 5z2 may include the fifth sub-recessed portion 5z22 and the second sub-recessed portion 5z21 that are interconnected; the third sub-recessed portion 5z31 and the sixth sub-recessed portion 5z32 are connected to form the third recessed portion 5z3, that is, the third recessed portion 5z3 includes the sixth sub-recessed portion 5z32 and the third sub-recessed portion 5z31 that are interconnected. The specific process is as follows: a base layer 51, a first touch functional layer 52, a touch insulating layer 53, a second touch functional layer 54, and a protective layer 55 are prepared sequentially. The protective layer 55 and the touch insulating layer 53 are patterned to form a first recess 5z1, a second recess 5z2, and a third recess 5z3. Then, a first filter layer 61, a second filter layer 62, and a third filter layer 63 are prepared sequentially.

[0175] The first filter layer 61, the second filter layer 62, and the third filter layer 63 do not completely cover the top surface of the protective layer 55 facing away from the display back panel 10. Specifically, the circumferential width of the overlapping portion of the first filter layer 61 and the protective layer 55 facing away from the display back panel 10 is greater than or equal to 0 and less than or equal to 2 micrometers. For example, the circumferential width of the overlapping portion of the first filter layer 61 and the protective layer 55 facing away from the display back panel 10 can be 0.3 micrometers, 0.5 micrometers, 0.8 micrometers, 1 micrometer, 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, etc. The circumferential width of the overlapping portion of the second filter layer 62 and the protective layer 55 facing away from the display back panel 10 is greater than or equal to 0 and less than or equal to 2 micrometers. For example, the circumferential width of the overlapping portion of the second filter layer 62 and the protective layer 55 facing away from the display back panel 10 can be 0.3 micrometers, 0.5 micrometers, 0.8 micrometers, 1 micrometer, 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, etc. The circumference of the overlapping portion of the third filter layer 63 and the protective layer 55 on the side away from the display backplate 10 is greater than or equal to 0 and less than or equal to 2 micrometers. For example, the circumference of the overlapping portion of the third filter layer 63 and the protective layer 55 on the side away from the display backplate 10 can be 0.3 micrometers, 0.5 micrometers, 0.8 micrometers, 1 micrometer, 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, etc.

[0176] The orthographic projection of the first filter layer 61 on the display back panel 10 does not overlap with the orthographic projections of the bridging portion 521 and the touch electrode 541 on the display back panel 10. The orthographic projection of the second filter layer 62 on the display back panel 10 does not overlap with the orthographic projections of the bridging portion 521 and the touch electrode 541 on the display back panel 10. The orthographic projection of the third filter layer 63 on the display back panel 10 does not overlap with the orthographic projections of the bridging portion 521 and the touch electrode 541 on the display back panel 10. This design ensures that regardless of which layer the first recessed portion 5z1, the second recessed portion 5z2, and the third recessed portion 5z3 are located on, the plane formed by the bridging portion 521 and the touch electrode 541 is relatively flat. This avoids the unevenness of the plane formed by the bridging portion 521 and the touch electrode 541 due to the placement of the first filter layer 61, the second filter layer 62, and the third filter layer 63 between the touch layer group 5, which would cause the bridging portion 521 and the touch electrode 541 to need to climb uphill and break, thus ensuring the touch effect.

[0177] Referring to Figures 1-27, the first recessed portion 5z1 corresponds one-to-one with the first sub-pixel 351. Specifically, the number of first recessed portions 5z1 is the same as the number of first sub-pixels 351, and the shape of the first recessed portion 5z1 is the same as the shape of the first sub-pixel 351. That is, the first recessed portion 5z1 is set to a shape that matches the first sub-pixel 351. For example, if the first sub-pixel 351 is set to a circle, the first recessed portion 5z1 is also set to a circle; if the first sub-pixel 351 is set to a rectangle, the first recessed portion 5z1 is also set to a rectangle. Of course, in other exemplary embodiments of this disclosure, the shape of the first sub-pixel 351 and the shape of the first recessed portion 5z1 can also be other shapes, which will not be described in detail here.

[0178] The distance between the sidewall of the first recessed portion 5z1 and the center of the first sub-pixel 351 in the first direction X increases as the height of the sidewall of the first recessed portion 5z1 in the second direction Y increases, so that the first recessed portion 5z1 forms a structure in which the opening is larger than the bottom.

[0179] It should be noted that in this disclosure, the second direction Y is perpendicular to the display surface of the display back panel 10, that is, the second direction Y is perpendicular to the side of the display back panel 10 where the touch layer group 5 is disposed; the first direction X is parallel to the display surface of the display back panel 10, that is, the first direction X is parallel to the side of the display back panel 10 where the touch layer group 5 is disposed.

[0180] In some exemplary embodiments of this disclosure, the sidewall of the first recess 5z1 may include a curved surface; the sidewall of the first recess 5z1 may include a first portion, a second portion, and a third portion that are smoothly connected in sequence, the first portion being closer to the display back panel 10 than the third portion, the second portion being a sloped surface, and the first and third portions being arc-shaped surfaces. The first portion may be recessed, and the third portion may be protruding. Specifically, the portion of the sidewall of the first recess 5z1 near the display back panel 10 may be an arc-shaped surface, the middle portion of the sidewall of the first recess 5z1 may be a sloped surface, and the portion of the sidewall of the first recess 5z1 away from the display back panel 10 may be an arc-shaped surface. In other exemplary embodiments of this disclosure, the sidewall of the first recess 5z1 may be a sloped surface, and the sidewall of the first recess 5z1 may only include the smoothly connected first and third portions, but the sidewall of the first recess 5z1 is generally inclined.

[0181] The angle between the sidewall of the first recess 5z1 and the first reference plane is greater than or equal to 55° and less than or equal to 85°. For example, the angle between the sidewall of the first recess 5z1 and the first reference plane can be 55°, 57°, 60°, 63°, 65°, 68°, 70°, 72°, 75°, 77°, 80°, 82°, etc. The first reference plane is parallel to the side of the display back panel 10 where the touch layer group 5 is disposed.

[0182] If the angle between the sidewall of the first recessed portion 5z1 and the first reference plane is too large, making the sidewall of the first recessed portion 5z1 almost perpendicular to the display back panel 10, when the first filter layer 61 fills into the first recessed portion 5z1, it cannot fill to the corner of the bottom wall of the first recessed portion 5z1. That is, gaps are easily formed at the corner of the bottom wall of the first recessed portion 5z1, which cannot achieve total reflection well, and the total reflection surface is lost, thus failing to achieve the converging effect of the emitted light well.

[0183] If the angle between the sidewall of the first recess 5z1 and the first reference plane is too small, making the sidewall of the first recess 5z1 relatively flat, most of the outgoing light rays emitted from the first sub-pixel 351 may have an angle greater than the angle between the sidewall of the first recess 5z1 and the first reference plane, making it impossible for the outgoing light rays to reach the sidewall of the first recess 5z1, thus failing to achieve total internal reflection and failing to achieve the converging effect of the outgoing light rays.

[0184] The above numerical range ensures that total internal reflection can be achieved for light rays emitted from the first sub-pixel 351 at a large tilt angle, thereby achieving the converging effect of the emitted light rays.

[0185] Referring to Figures 2, 5, 7, 10, 12, 15, 19, 22, and 26, the second recessed portion 5z2 corresponds one-to-one with the second sub-pixel 352. Specifically, the number of second recessed portions 5z2 is the same as the number of second sub-pixels 352, and the shape of the second recessed portion 5z2 is the same as the shape of the second sub-pixel 352. That is, the second recessed portion 5z2 is set to a shape that matches the second sub-pixel 352. For example, if the second sub-pixel 352 is set to a circle, the second recessed portion 5z2 is also set to a circle; if the second sub-pixel 352 is set to a rectangle, the second recessed portion 5z2 is also set to a rectangle. Of course, in other exemplary embodiments of this disclosure, the shape of the second sub-pixel 352 and the shape of the second recessed portion 5z2 can also be other shapes, which will not be described in detail here.

[0186] The distance between the sidewall of the second recessed portion 5z2 and the center of the second sub-pixel 352 in the first direction X increases as the height of the sidewall of the second recessed portion 5z2 in the second direction Y increases, so that the second recessed portion 5z2 forms a structure in which the opening is larger than the bottom.

[0187] In some exemplary embodiments of this disclosure, the sidewall of the second recess 5z2 may include a curved surface; the sidewall of the second recess 5z2 may include a fourth portion, a fifth portion, and a sixth portion that are smoothly connected in sequence, the fourth portion being closer to the display back panel 10 than the sixth portion, the fifth portion being a slope, and the fourth and sixth portions being arc surfaces. The fourth portion may be recessed, and the sixth portion may be protruding. Specifically, the portion of the sidewall of the second recess 5z2 near the display back panel 10 may be an arc surface, the middle portion of the sidewall of the second recess 5z2 may be a slope, and the portion of the sidewall of the second recess 5z2 away from the display back panel 10 may be an arc surface. In other exemplary embodiments of this disclosure, the sidewall of the second recess 5z2 may be a slope, and the sidewall of the second recess 5z2 may only include the smoothly connected fourth and sixth portions, but the sidewall of the second recess 5z2 is generally inclined.

[0188] The angle between the sidewall of the second recess 5z2 and the first reference plane is greater than or equal to 55° and less than or equal to 85°. For example, the angle between the sidewall of the second recess 5z2 and the first reference plane can be 55°, 57°, 60°, 63°, 65°, 68°, 70°, 72°, 75°, 77°, 80°, 82°, etc.

[0189] If the angle between the sidewall of the second recess 5z2 and the first reference plane is too large, making the sidewall of the second recess 5z2 almost perpendicular to the display back panel 10, when the second filter layer 62 fills into the second recess 5z2, it cannot fill to the corner of the bottom wall of the second recess 5z2. That is, gaps are easily formed at the corner of the bottom wall of the second recess 5z2, which cannot achieve total reflection well, and the total reflection surface is lost, thus failing to achieve the converging effect of the emitted light well.

[0190] If the angle between the sidewall of the second recess 5z2 and the first reference plane is too small, making the sidewall of the second recess 5z2 relatively flat, most of the outgoing light rays emitted from the second sub-pixel 352 may have an angle greater than the angle between the sidewall of the second recess 5z2 and the first reference plane, making it impossible for the outgoing light rays to reach the sidewall of the second recess 5z2, thus failing to achieve total internal reflection and failing to achieve the converging effect of the outgoing light rays.

[0191] The above numerical range ensures that total internal reflection can be achieved for light rays emitted from the second sub-pixel 352 at a large tilt angle, thereby achieving the converging effect of the emitted light rays.

[0192] Referring to Figures 2, 5, 7, 10, 12, 15, 19, 22, and 26, the third recessed portion 5z3 corresponds one-to-one with the third sub-pixel 353. Specifically, the number of third recessed portions 5z3 is the same as the number of third sub-pixels 353, and the shape of the third recessed portion 5z3 is the same as the shape of the third sub-pixel 353. That is, the third recessed portion 5z3 is set to a shape that matches the third sub-pixel 353. For example, if the third sub-pixel 353 is set to a circle, the third recessed portion 5z3 is also set to a circle; if the third sub-pixel 353 is set to a rectangle, the third recessed portion 5z3 is also set to a rectangle. Of course, in other exemplary embodiments of this disclosure, the shape of the third sub-pixel 353 and the shape of the third recessed portion 5z3 can also be other shapes, which will not be described in detail here.

[0193] The distance from the center of the third sub-pixel 353 on the sidewall of the third recess 5z3 in the first direction X increases with the increase of the height of the sidewall of the third recess 5z3 in the second direction Y, so that the third recess 5z3 forms a structure in which the opening is larger than the bottom.

[0194] In some exemplary embodiments of this disclosure, the sidewall of the third recess 5z3 may include a curved surface; the sidewall of the third recess 5z3 may include a seventh portion, an eighth portion, and a ninth portion that are smoothly connected in sequence, the seventh portion being closer to the display back panel 10 than the ninth portion, the eighth portion being a slope, and the seventh and ninth portions being arc surfaces. The seventh portion may be recessed, and the ninth portion may be protruding. Specifically, the portion of the sidewall of the third recess 5z3 near the display back panel 10 may be an arc surface, the middle portion of the sidewall of the third recess 5z3 may be a slope, and the portion of the sidewall of the third recess 5z3 away from the display back panel 10 may be an arc surface. In other exemplary embodiments of this disclosure, the sidewall of the third recess 5z3 may be a slope, and the sidewall of the third recess 5z3 may only include the smoothly connected seventh and ninth portions, but the sidewall of the third recess 5z3 is generally inclined.

[0195] The angle between the sidewall of the third recess 5z3 and the first reference plane is greater than or equal to 55° and less than or equal to 85°. For example, the angle between the sidewall of the third recess 5z3 and the first reference plane can be 55°, 57°, 60°, 63°, 65°, 68°, 70°, 72°, 75°, 77°, 80°, 82°, etc.

[0196] If the angle between the sidewall of the third recess 5z3 and the first reference plane is too large, making the sidewall of the third recess 5z3 almost perpendicular to the display back panel 10, when the third filter layer 63 fills into the third recess 5z3, it cannot fill to the corner of the bottom wall of the third recess 5z3. That is, gaps are easily formed at the corner of the bottom wall of the third recess 5z3, which cannot achieve total reflection well, and the total reflection surface is lost, thus failing to achieve the converging effect of the emitted light well.

[0197] If the angle between the sidewall of the third recess 5z3 and the first reference plane is too small, making the sidewall of the third recess 5z3 relatively flat, most of the outgoing light rays emitted from the third sub-pixel 353 may have an angle greater than the angle between the sidewall of the third recess 5z3 and the first reference plane, making it impossible for the outgoing light rays to reach the sidewall of the third recess 5z3, thus failing to achieve total internal reflection and failing to achieve the converging effect of the outgoing light rays.

[0198] The above numerical range ensures that total internal reflection can be achieved for light rays emitted from the third sub-pixel 353 at a large tilt angle, thereby achieving the converging effect of the emitted light rays.

[0199] In this case, referring to Figures 2, 5, 10, 15, 19, 22, and 26, the first recess 5z1 can be configured as a blind hole that does not penetrate the insulating layer 5a, that is, an insulating layer 5a is also provided at the bottom of the first recess 5z1, but the thickness of the insulating layer 5a at the first recess 5z1 is less than the thickness of other parts; the second recess 5z2 can be configured as a through hole that penetrates the insulating layer 5a, and the third recess 5z3 can be configured as a through hole that penetrates the insulating layer 5a.

[0200] This configuration ensures that the depth of the first recess 5z1 is less than the depth of the second recess 5z2, and the depth of the first recess 5z1 is less than the depth of the third recess 5z3. Consequently, the area of ​​the sidewall of the first recess 5z1 is less than the area of ​​the sidewall of the second recess 5z2, and the area of ​​the sidewall of the first recess 5z1 is less than the area of ​​the sidewall of the third recess 5z3. This reduces the interface of the first recess 5z1 that generates total internal reflection, thereby reducing the light emission efficiency of the first sub-pixel 351. This can reduce or even avoid color shift caused by the different light emission efficiency gains of sub-pixels 35 of different colors.

[0201] Referring to Figures 1, 3, 4, 6, 8, 9, 11, 13, 14, 16-18, 20, 21, 23-25, and 27, the second recessed portion 5z2 can be configured as an annular shape adapted to the second sub-pixel 352, so that the total reflection interface of the second recessed portion 5z2 is larger than the total reflection interface of the first recessed portion 5z1; for example, the second sub-pixel 352 is configured as a circle, and the second recessed portion 5z2 is also configured as an annular shape; the second sub-pixel 352 is configured as a rectangle, and the second recessed portion 5z2 is also configured as a rectangular ring; of course, in other exemplary embodiments of this disclosure, the shape of the second sub-pixel 352 and the shape of the second recessed portion 5z2 can also be other shapes, which will not be described one by one here.

[0202] This configuration ensures that the area of ​​the sidewall of the first recess 5z1 is smaller than the area of ​​the sidewall of the second recess 5z2. Specifically, the insulating layer 5a can include a second island 5z4, the shape of which can be the same as the shape of the second sub-pixel 352. For example, if the second sub-pixel 352 is circular, the second island 5z4 can also be circular; if the second sub-pixel 352 is rectangular, the second island 5z4 can also be rectangular. Of course, in other exemplary embodiments of this disclosure, the shapes of the second sub-pixel 352 and the second island 5z4 can also be other shapes, which will not be described in detail here.

[0203] When light travels from the second filter layer 62 to the insulating layer 5a, it travels from an optically denser medium to an optically less dense medium. Therefore, total internal reflection easily occurs at the interface between the second filter layer 62 and the sidewall of the second island 5z4. The sidewall of the second island 5z4 causes the tilted outgoing light to undergo total internal reflection, changing the angle of the outgoing light and thus converging the total internally reflected light, allowing it to exit from the front of the display panel and improving the light extraction efficiency of the front of the display panel. In other words, the second island 5z4 increases the amount of light participating in total internal reflection, thereby improving the light extraction efficiency of the second sub-pixel 352 and compensating for the low refractive index of the second filter layer 62.

[0204] When the second recess 5z2 is set to be annular, the distance between the outer ring sidewall of the second recess 5z2 and the center of the second sub-pixel 352 in the first direction X increases as the height of the outer ring sidewall of the second recess 5z2 in the second direction Y increases, and the distance between the inner ring sidewall of the second recess 5z2 and the center of the second sub-pixel 352 in the first direction X decreases as the height of the inner ring sidewall of the second recess 5z2 in the second direction Y increases, so that the second recess 5z2 forms an annular shape with an opening larger than the bottom.

[0205] The outer ring sidewall of the second recessed portion 5z2 is the sidewall of the second recessed portion 5z2 mentioned above. Its specific structure has been described in detail above, so it will not be repeated here.

[0206] The inner ring sidewall of the second recessed portion 5z2 is the sidewall of the second island 5z4. That is, the distance between the sidewall of the second island 5z4 and the center of the second sub-pixel 352 in the first direction X decreases as the height of the sidewall of the second island 5z4 in the second direction Y increases, so that the second island 5z4 forms a structure with the top smaller than the bottom.

[0207] In some exemplary embodiments of this disclosure, the sidewall of the second island 5z4 may include a curved surface; the sidewall of the second island 5z4 may include a first segment, a second segment, and a third segment that are smoothly connected in sequence, with the first segment closer to the display back panel 10 than the third segment, the second segment being a sloped surface, and the first and third segments being arc-shaped surfaces. The first segment may be concave, and the third segment may be convex. Specifically, the portion of the sidewall of the second island 5z4 near the display back panel 10 may be an arc-shaped surface, the middle portion of the sidewall of the second island 5z4 may be a sloped surface, and the portion of the sidewall of the second island 5z4 away from the display back panel 10 may be an arc-shaped surface. In other exemplary embodiments of this disclosure, the sidewall of the second island 5z4 may be a sloped surface, and the sidewall of the second island 5z4 may only include the smoothly connected first and third segments, but the sidewall of the second island 5z4 is generally inclined.

[0208] The inner ring sidewall of the second recess 5z2 includes a slope. The angle between the inner ring sidewall of the second recess 5z2 and the first reference plane is greater than or equal to 55° and less than or equal to 85°. That is, the angle between the sidewall of the second island 5z4 and the first reference plane is greater than or equal to 55° and less than or equal to 85°. For example, the angle between the sidewall of the second island 5z4 and the first reference plane can be 55°, 57°, 60°, 63°, 65°, 68°, 70°, 72°, 75°, 77°, 80°, 82°, etc.

[0209] If the angle between the sidewall of the second island 5z4 and the first reference plane is too large, making the sidewall of the second island 5z4 almost perpendicular to the display back panel 10, when the second filter layer 62 fills into the second recess 5z2, it cannot fill to the corner of the bottom wall of the second recess 5z2. That is, gaps are easily formed at the corner of the bottom of the second island 5z4, which cannot achieve total reflection well, and the total reflection surface is lost, thus failing to achieve the converging effect of the emitted light well.

[0210] If the angle between the sidewall of the second island 5z4 and the first reference plane is too small, making the sidewall of the second island 5z4 relatively flat, most of the outgoing light rays emitted from the second sub-pixel 352 may have an angle greater than the angle between the sidewall of the second island 5z4 and the first reference plane, making it impossible for the outgoing light rays to reach the sidewall of the second island 5z4, thus failing to achieve total internal reflection and failing to achieve the converging effect of the outgoing light rays.

[0211] The above numerical range ensures that total internal reflection can be achieved for light rays emitted from the second sub-pixel 352 at a large tilt angle, thereby achieving the converging effect of the emitted light rays.

[0212] The maximum size of the orthographic projection of the second island 5z4 on the display back panel 10 is greater than or equal to 3 micrometers and less than or equal to 5 micrometers. That is, the maximum size of the orthographic projection of the inner ring surface of the second recess 5z2 on the display back panel 10 is greater than or equal to 3 micrometers and less than or equal to 5 micrometers. It can also be said that the bottom width of the second island 5z4 is greater than or equal to 3 micrometers and less than or equal to 5 micrometers. For example, the maximum size of the orthographic projection of the second island 5z4 on the display back panel 10 can be 3.2 micrometers, 3.5 micrometers, 3.7 micrometers, 4 micrometers, 4.3 micrometers, 4.5 micrometers, 4.8 micrometers, etc.

[0213] Referring to Figures 1, 3, 4, 6, 8, 9, 11, 13, 14, 16-18, 20, 21, 23-25, and 27, the third recess 5z3 can be configured as an annular shape adapted to the third sub-pixel 353, so that the total reflection interface of the third recess 5z3 is larger than the total reflection interface of the first recess 5z1; for example, the third sub-pixel 353 is configured as a circle, and the third recess 5z3 is also configured as an annular shape; the third sub-pixel 353 is configured as a rectangle, and the third recess 5z3 is also configured as a rectangular ring; of course, in other exemplary embodiments of this disclosure, the shape of the third sub-pixel 353 and the shape of the third recess 5z3 can also be other shapes, which will not be described one by one here.

[0214] This configuration ensures that the area of ​​the sidewall of the first recess 5z1 is smaller than the area of ​​the sidewall of the third recess 5z3. Specifically, the insulating layer 5a can include a third island 5z5, the shape of which can be the same as the shape of the third sub-pixel 353. For example, if the third sub-pixel 353 is circular, the third island 5z5 can also be circular; or if the third sub-pixel 353 is rectangular, the third island 5z5 can also be rectangular. Of course, in other exemplary embodiments of this disclosure, the shapes of the third sub-pixel 353 and the third island 5z5 can also be other shapes, which will not be described in detail here.

[0215] Light traveling from the third filter layer 63 to the insulating layer 5a is incident from an optically denser medium to an optically less dense medium. Therefore, total internal reflection easily occurs at the interface between the third filter layer 63 and the sidewall of the third island 5z5. The sidewall of the third island 5z5 causes the tilted outgoing light to undergo total internal reflection, changing the angle of the outgoing light and thus converging the total internally reflected light, allowing it to exit from the front of the display panel and improving the light extraction efficiency of the front of the display panel. In other words, the third island 5z5 increases the amount of light participating in total internal reflection, thereby improving the light extraction efficiency of the third sub-pixel 353 and compensating for the low refractive index of the third filter layer 63.

[0216] When the third recess 5z3 is set to be annular, the distance between the outer ring sidewall of the third recess 5z3 and the center of the third sub-pixel 353 in the first direction X increases as the height of the outer ring sidewall of the third recess 5z3 in the second direction Y increases, and the distance between the inner ring sidewall of the third recess 5z3 and the center of the third sub-pixel 353 in the first direction X decreases as the height of the inner ring sidewall of the third recess 5z3 in the second direction Y increases, so that the third recess 5z3 forms an annular shape with an opening larger than the bottom.

[0217] The outer ring sidewall of the third recess 5z3 is the sidewall of the third recess 5z3 mentioned above. Its specific structure has been described in detail above, so it will not be repeated here.

[0218] The inner ring sidewall of the third recess 5z3 is the sidewall of the third island 5z5. That is, the distance between the sidewall of the third island 5z5 and the center of the third sub-pixel 353 in the first direction X decreases as the height of the sidewall of the third island 5z5 in the second direction Y increases, so that the third island 5z5 forms a structure where the top is smaller than the bottom.

[0219] In some exemplary embodiments of this disclosure, the sidewall of the third island 5z5 may include a curved surface; the sidewall of the third island 5z5 may include a fourth segment, a fifth segment, and a sixth segment that are smoothly connected in sequence, with the fourth segment closer to the display back panel 10 than the sixth segment, the fifth segment being a sloped surface, and the fourth and sixth segments being arc-shaped surfaces. The fourth segment may be concave, and the sixth segment may be convex. Specifically, the portion of the sidewall of the third island 5z5 near the display back panel 10 may be an arc-shaped surface, the middle portion of the sidewall of the third island 5z5 may be a sloped surface, and the portion of the sidewall of the third island 5z5 away from the display back panel 10 may be an arc-shaped surface. In other exemplary embodiments of this disclosure, the sidewall of the third island 5z5 may be a sloped surface, and the sidewall of the third island 5z5 may only include the smoothly connected fourth and sixth segments, but the sidewall of the third island 5z5 is generally inclined.

[0220] The inner ring sidewall of the third recess 5z3 includes a slope. The angle between the inner ring sidewall of the third recess 5z3 and the first reference plane is greater than or equal to 55° and less than or equal to 85°. That is, the angle between the sidewall of the third island 5z5 and the first reference plane is greater than or equal to 55° and less than or equal to 85°. For example, the angle between the sidewall of the third island 5z5 and the first reference plane can be 55°, 57°, 60°, 63°, 65°, 68°, 70°, 72°, 75°, 77°, 80°, 82°, etc. The first reference plane is parallel to the side of the display back panel 10 where the touch layer group 5 is disposed.

[0221] If the angle between the sidewall of the third island 5z5 and the first reference plane is too large, making the sidewall of the third island 5z5 almost perpendicular to the display back panel 10, when the third filter layer 63 fills into the third recess 5z3, it cannot fill to the corner of the bottom wall of the third recess 5z3. That is, a gap is easily formed at the corner of the bottom of the third island 5z5, which cannot achieve total reflection well, and the total reflection surface is lost, thus failing to achieve the converging effect of the emitted light well.

[0222] If the angle between the sidewall of the third island 5z5 and the first reference plane is too small, making the sidewall of the third island 5z5 relatively flat, most of the outgoing light rays emitted from the third sub-pixel 353 may have an angle greater than the angle between the sidewall of the third island 5z5 and the first reference plane, making it impossible for the outgoing light rays to reach the sidewall of the third island 5z5, thus failing to achieve total internal reflection and failing to achieve the converging effect of the outgoing light rays.

[0223] The above numerical range ensures that total internal reflection can be achieved for light rays emitted from the third sub-pixel 353 at a large tilt angle, thereby achieving the converging effect of the emitted light rays.

[0224] The maximum size of the orthographic projection of the third island 5z5 on the display back panel 10 is greater than or equal to 3 micrometers and less than or equal to 5 micrometers. That is, the maximum size of the orthographic projection of the inner ring surface of the third recess 5z3 on the display back panel 10 is greater than or equal to 3 micrometers and less than or equal to 5 micrometers. It can also be said that the bottom width of the third island 5z5 is greater than or equal to 3 micrometers and less than or equal to 5 micrometers. For example, the maximum size of the orthographic projection of the third island 5z5 on the display back panel 10 can be 3.2 micrometers, 3.5 micrometers, 3.7 micrometers, 4 micrometers, 4.3 micrometers, 4.5 micrometers, 4.8 micrometers, etc.

[0225] Referring to Figures 7, 8, 12, 13, 18-20, and 25-27, in some exemplary embodiments of this disclosure, the touch layer group 5 may further include a functional layer 5b. The functional layer 5b is disposed between two adjacent insulating layers 5a and is configured in a grid shape, with one grid corresponding to one sub-pixel 35, thus preventing the functional layer 5b from blocking the forward light emission of each sub-pixel 35. The functional layer 5b may include a dummy portion 5b1, which is provided with a via 5b11. The orthogonal projection of the via 5b11 onto the display back panel 10 covers the first sub-pixel 351. For example, the edge line of the orthogonal projection of the via 5b11 onto the display back panel 10 may coincide with the edge line of the first sub-pixel 351, or the area of ​​the orthogonal projection of the via 5b11 onto the display back panel 10 may be larger than the area of ​​the first sub-pixel 351. This configuration prevents the dummy portion 5b1 from blocking the forward light emission of the first sub-pixel 351.

[0226] The dummy portion 5b1 extends at least to the sidewall of the first recessed portion 5z1. For example, the dummy portion 5b1 can extend to the sidewall of the first recessed portion 5z1 and be flush with the sidewall of the first recessed portion 5z1. This arrangement ensures that a portion of the sidewall of the first recessed portion 5z1 is occupied by the dummy portion 5b1 and cannot undergo total internal reflection. This reduces the amount of light that undergoes total internal reflection at the interface between the first filter layer 61 and the first recessed portion 5z1, thereby reducing the light emission efficiency of the first sub-pixel 351. This can reduce or even avoid color shift caused by the different gains in light emission efficiency of sub-pixels 35 of different colors.

[0227] Alternatively, the dummy portion 5b1 can extend to the sidewall of the first recessed portion 5z1 and protrude beyond it. This configuration ensures that a portion of the sidewall of the first recessed portion 5z1 is occupied by the dummy portion 5b1, preventing total internal reflection. This reduces the amount of light that undergoes total internal reflection at the interface between the first filter layer 61 and the first recessed portion 5z1, thereby lowering the light extraction efficiency of the first sub-pixel 351. This can reduce or even avoid color shift caused by different gains in the light extraction efficiency of sub-pixels 35 of different colors. Furthermore, the dummy portion 5b1 can block light emitted from the first sub-pixel 351, further reducing its light extraction efficiency and minimizing or even avoiding color shift caused by different gains in the light extraction efficiency of sub-pixels 35 of different colors.

[0228] Specifically, referring to Figure 12, the distance D1 between the edge of the orthogonal projection of the via 5b11 on the display back panel 10 and the edge of the first sub-pixel 351 is greater than or equal to 0 and less than or equal to 1 micrometer. For example, the distance D1 between the edge of the orthogonal projection of the via 5b11 on the display back panel 10 and the edge of the first sub-pixel 351 can be 0.1 micrometer, 0.2 micrometer, 0.3 micrometer, 0.4 micrometer, 0.5 micrometer, 0.6 micrometer, 0.7 micrometer, 0.8 micrometer, 0.9 micrometer, etc.

[0229] If the distance D1 between the edge of the orthographic projection of the via 5b11 on the display back panel 10 and the edge of the first sub-pixel 351 is too large, the dummy portion 5b1 cannot extend to the sidewall of the first recessed portion 5z1. That is, a portion of the sidewall of the first recessed portion 5z1 cannot be occupied by the dummy portion 5b1, thus failing to reduce the total internal reflection of light at the interface between the first filter layer 61 and the first recessed portion 5z1, and consequently reducing the light emission efficiency of the first sub-pixel 351. Within the aforementioned range, a portion of the sidewall of the first recessed portion 5z1 is occupied by the dummy portion 5b1, preventing total internal reflection and thus reducing the total internal reflection of light at the interface between the first filter layer 61 and the first recessed portion 5z1, thereby reducing the light emission efficiency of the first sub-pixel 351.

[0230] The dummy portion 5b1 extends at least to the sidewall of the first recessed portion 5z1. In other words, the orthographic projection of the via 5b11 on the display back panel 10 lies within the orthographic projection of the first recessed portion 5z1 on the display back panel 10. Specifically, the distance D2 between the edge of the orthographic projection of the via 5b11 on the display back panel 10 and the edge of the orthographic projection of the first recessed portion 5z1 on the display back panel 10 is greater than or equal to 0 and less than or equal to 2 micrometers. For example, the distance D2 between the edge of the orthographic projection of the via 5b11 on the display back panel 10 and the edge of the orthographic projection of the first recessed portion 5z1 on the display back panel 10 can be 0.3 micrometers, 0.5 micrometers, 0.8 micrometers, 1 micrometer, 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, etc.

[0231] If the distance D2 between the edge of the orthographic projection of the via 5b11 on the display back panel 10 and the edge of the orthographic projection of the first recess 5z1 on the display back panel 10 is too large, the dummy part 5b1 will protrude too much from the sidewall of the first recess 5z1. This will cause the dummy part 5b1 to easily block the first sub-pixel 351, resulting in a significant reduction in the light emission efficiency of the first sub-pixel 351. The above-mentioned numerical range ensures that the dummy part 5b1 will not block the first sub-pixel 351, thus guaranteeing the light emission efficiency of the forward-facing first sub-pixel 351.

[0232] In this example embodiment, the dummy part 5b1 can be configured as a ring, and the ring width of the dummy part 5b1 is greater than or equal to 3 micrometers and less than or equal to 4 micrometers. For example, the ring width of the dummy part 5b1 can be 3.1 micrometers, 3.2 micrometers, 3.3 micrometers, 3.4 micrometers, 3.5 micrometers, 3.6 micrometers, 3.7 micrometers, 3.8 micrometers, 3.9 micrometers, etc.

[0233] If the ring width of the dummy part 5b1 is too large, it will make the dummy part 5b1 easily electrically connected to the touch electrode 541, affecting the touch signal; or it will make the dummy part 5b1 block the light emission of the sub-pixel 35 more.

[0234] If the ring width of the dummy part 5b1 is too small, it will be difficult for the dummy part 5b1 to extend to the side wall of the first recessed part 5z1. That is, a part of the side wall of the first recessed part 5z1 cannot be occupied by the dummy part 5b1, and the total internal reflection of light generated at the interface between the first filter layer 61 and the first recessed part 5z1 cannot be reduced, and the light emission efficiency of the first sub-pixel 351 cannot be reduced.

[0235] The above-mentioned numerical range not only ensures that a portion of the sidewall of the first recessed portion 5z1 is occupied by the dummy portion 5b1 and cannot undergo total internal reflection, thereby reducing the light that undergoes total internal reflection at the interface between the first filter layer 61 and the first recessed portion 5z1, thus reducing the light emission efficiency of the first sub-pixel 351; but also that the dummy portion 5b1 will not be electrically connected to the touch electrode 541, will not affect the touch signal, and will not block the light emission of the sub-pixel 35.

[0236] It should be noted that the dummy part 5b1 can be a closed ring structure or a ring structure with a break. The break can be set to one, two or more.

[0237] Referring to Figures 7 and 8, when the first recessed portion 5z1, the second recessed portion 5z2, and the third recessed portion 5z3 are provided on the touch insulating layer 53, the functional layer 5b is the first touch functional layer 52, which means that the first touch functional layer 52 may include a dummy portion 5b1 and a bridging portion 521. The bridging portion 521 and the dummy portion 5b1 can be disconnected by a broken wire, and the dummy portion 5b1 blocks the bottom of the first recessed portion 5z1.

[0238] Referring to Figures 12 and 13, when the first recess 5z1, the second recess 5z2, and the third recess 5z3 are provided on the protective layer 55, the functional layer 5b is the second touch function layer 54, which means that the second touch function layer 54 may include a dummy part 5b1 and a touch electrode 541. The touch electrode 541 and the dummy part 5b1 can be disconnected by a broken wire, and the dummy part 5b1 blocks the bottom of the first recess 5z1.

[0239] Referring to Figures 18-20, when the first recessed portion 5z1, the second recessed portion 5z2, and the third recessed portion 5z3 are provided on the base layer 51 and the touch insulating layer 53, the functional layer 5b is the first touch functional layer 52, which means that the first touch functional layer 52 may include a dummy portion 5b1 and a bridging portion 521. The bridging portion 521 and the dummy portion 5b1 can be disconnected by a broken wire, and the dummy portion 5b1 blocks the middle part of the first recessed portion 5z1.

[0240] Referring to Figures 25-27, when the first recess 5z1, the second recess 5z2, and the third recess 5z3 are provided on the touch insulating layer 53 and the protective layer 55, the functional layer 5b is the second touch functional layer 54, which means that the second touch functional layer 54 may include a dummy part 5b1 and a touch electrode 541. The touch electrode 541 and the dummy part 5b1 can be disconnected by a broken wire, and the dummy part 5b1 blocks the middle part of the first recess 5z1.

[0241] Referring to Figures 17 and 24, when the first recess 5z1 is provided with two insulating layers 5a, that is, when the first recess 5z1 includes a first sub-recess 5z11 and a fourth sub-recess 5z12, the orthographic projection area of ​​the end of the fourth sub-recess 5z12 near the first sub-recess 5z11 on the display back panel 10 is greater than the orthographic projection area of ​​the end of the first sub-recess 5z11 near the fourth sub-recess 5z12 on the display back panel 10, so that the first recess 5z1 forms a stepped structure with an opening larger than the bottom.

[0242] This configuration causes the first sub-recessed portion 5z11 to partially block the fourth sub-recessed portion 5z12. That is, the light emitted from the first sub-pixel 351 cannot reach the end of the fourth sub-recessed portion 5z12 near the first sub-recessed portion 5z11 due to the blocking effect of the first sub-recessed portion 5z11. This reduces the total internal reflection interface of the first recessed portion 5z1 and reduces the light that is totally internally reflected at the interface between the first filter layer 61 and the first recessed portion 5z1, thereby reducing the light emission efficiency of the first sub-pixel 351. This can reduce or even avoid color shift caused by the different light emission efficiency gains of sub-pixels 35 of different colors.

[0243] In the above example embodiment, the refractive index of the base layer 51, the touch insulating layer 53 and the protective layer 55 can be the same. Specifically, the refractive index of the base layer 51, the touch insulating layer 53 and the protective layer 55 can be greater than or equal to 1.45 and less than or equal to 1.55. For example, the refractive index can be 1.47, 1.5, 1.53 and so on.

[0244] The thickness of the substrate layer 51 can be greater than or equal to 1.5 micrometers and less than or equal to 2.5 micrometers. For example, the thickness of the substrate layer 51 can be 1.8 micrometers, 2 micrometers, 2.3 micrometers, etc. The thickness of the touch insulating layer 53 can be greater than or equal to 1.5 micrometers and less than or equal to 2.5 micrometers. For example, the thickness of the touch insulating layer 53 can be 1.8 micrometers, 2 micrometers, 2.3 micrometers, etc. The thickness of the protective layer 55 can be greater than or equal to 1.5 micrometers and less than or equal to 2.5 micrometers. For example, the thickness of the protective layer 55 can be 1.8 micrometers, 2 micrometers, 2.3 micrometers, etc.

[0245] Of course, in some other example embodiments of this disclosure, the first recess 5z1, the second recess 5z2 and the third recess 5z3 may also be provided on different insulating layers 5a.

[0246] It should be noted that the structure described above for reducing the total reflection interface of the first recessed portion 5z1 can be used alone in a display panel, or it can be a combination of one, two, or more structures for a display panel, including the structure for reducing the total reflection interface of the first recessed portion 5z1, the structure for increasing the total reflection interface of the second recessed portion 5z2, and the structure for increasing the total reflection interface of the third recessed portion 5z3. Alternatively, it can be a combination of one, two, or more structures for a display panel, including the structure for increasing the total reflection interface of the second recessed portion 5z2 and the structure for increasing the total reflection interface of the third recessed portion 5z3.

[0247] In some exemplary embodiments of this disclosure, referring to Figures 28–36, a first recess 5z1 is provided on the insulating layer group 5z, and at least a portion of the first filter layer 61 is located within the first recess 5z1. The specific structure and relationship of the first recess 5z1 and the first filter layer 61 have been described in detail above, and therefore will not be repeated here.

[0248] The insulating layer group 5z may include a second protrusion 5z6, the orthographic projection of the second protrusion 5z6 on the display back panel 10 at least partially overlapping with the second sub-pixel 352.

[0249] Referring to Figures 28–36, the second protrusion 5z6 may include a sidewall and a top wall, with the top wall parallel to the display surface and the sidewall intersecting the display surface. The second protrusion 5z6 and the second sub-pixel 352 may correspond one-to-one. Specifically, the number of second protrusions 5z6 is the same as the number of second sub-pixels 352, and the shape of the second protrusion 5z6 is the same as the shape of the second sub-pixel 352. For example, if the second sub-pixel 352 is circular, the second protrusion 5z6 is also circular; if the second sub-pixel 352 is rectangular, the second protrusion 5z6 is also rectangular. Of course, in other exemplary embodiments of this disclosure, the shapes of the second sub-pixel 352 and the second protrusion 5z6 may also be other shapes, which will not be described in detail here.

[0250] The orthographic projection of the second protrusion 5z6 on the display back panel 10 at least partially overlaps with the second sub-pixel 352. For example, the edge line of the orthographic projection of the second protrusion 5z6 on the display back panel 10 may coincide with the edge line of the second sub-pixel 352, or the orthographic projection of the second protrusion 5z6 on the display back panel 10 may cover and be larger than the second sub-pixel 352. In both cases, the orthographic projection of the second protrusion 5z6 on the display back panel 10 completely covers the second sub-pixel 352. In this case, the distance between the edge line of the orthographic projection of the second protrusion 5z6 on the display back panel 10 and the edge line of the second sub-pixel 352 in the first direction X is greater than or equal to 0.5 micrometers and less than or equal to 2 micrometers. For example, the distance between the edge line of the orthographic projection of the second protrusion 5z6 on the display back panel 10 and the edge line of the second sub-pixel 352 in the first direction X may be 0.8 micrometers, 1 micrometer, 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, etc.

[0251] Of course, in some other example embodiments of this disclosure, a portion of the orthographic projection of the second protrusion 5z6 onto the display back panel 10 may overlap with a portion of the second sub-pixel 352.

[0252] It should be noted that since the sidewall of the second protrusion 5z6 is inclined, when compared with the second sub-pixel 352, the range of the orthographic projection of the second protrusion 5z6 on the display back panel 10 refers to the orthographic projection of the side (bottom wall) of the second protrusion 5z6 closest to the display back panel 10 on the display back panel 10, that is, the orthographic projection of the bottom wall of the second protrusion 5z6 on the display back panel 10 at least partially overlaps with the second sub-pixel 352.

[0253] The distance between the sidewall of the second protrusion 5z6 and the center of the second sub-pixel 352 in the first direction X increases as the height of the sidewall of the second protrusion 5z6 in the second direction Y decreases, so that the second protrusion 5z6 forms a roughly frustum-shaped structure with the top smaller than the bottom.

[0254] In some exemplary embodiments of this disclosure, the sidewall of the second protrusion 5z6 may include a curved surface; the sidewall of the second protrusion 5z6 may include a tenth portion, an eleventh portion, and a twelfth portion that are smoothly connected in sequence, the tenth portion being closer to the display back panel 10 than the twelfth portion, the eleventh portion being a slope, and the tenth and twelfth portions being arc surfaces, the tenth portion being recessed and the twelfth portion being protruding; specifically, the portion of the sidewall of the second protrusion 5z6 near the display back panel 10 may be an arc surface, the middle portion of the sidewall of the second protrusion 5z6 may be a slope, and the portion of the sidewall of the second protrusion 5z6 away from the display back panel 10 may be an arc surface. In other exemplary embodiments of this disclosure, the sidewall of the second protrusion 5z6 may be a slope, and the sidewall of the second protrusion 5z6 may only include the smoothly connected tenth and twelfth portions, but the sidewall of the second protrusion 5z6 is generally inclined.

[0255] The second filter layer 62 is disposed on the side of the second protrusion 5z6 opposite to the display back panel 10. The second filter layer 62 can be a green filter layer, meaning that the second filter layer 62 can only allow green light to pass through. The second filter layer 62 covers at least a portion of the sidewalls of the second protrusion 5z6. For example, the second filter layer 62 can cover all the sidewalls of the second protrusion 5z6, or it can cover only a portion of the sidewalls of the second protrusion 5z6.

[0256] The following explanation will be based on the example where the second filter layer 62 can cover all the sidewalls of the second protrusion 5z6.

[0257] The refractive index of the second filter layer 62 is less than the refractive index of the second protrusion 5z6. Specifically, the refractive index of the second filter layer 62 is greater than or equal to 1.55 and less than or equal to 1.65. For example, the refractive index of the second filter layer 62 can be 1.58, 1.6, 1.62, etc. The refractive index of the second protrusion 5z6 is greater than or equal to 1.7 and less than or equal to 1.85, that is, the refractive index of the insulating layer 5a on which the second protrusion 5z6 is provided is greater than or equal to 1.7 and less than or equal to 1.85. For example, the refractive index of the second protrusion 5z6 can be 1.72, 1.75, 1.77, 1.8, 1.82, etc.

[0258] Light rays traveling from the second protrusion 5z6 to the second filter layer 62 travel from a denser medium to a less dense medium. The sidewall of the second protrusion 5z6 can adjust the incident angle of the light rays emitted from the second sub-pixel 352 at the interface between the second protrusion 5z6 and the second filter layer 62, making the incident angle smaller. As a result, refraction can occur at the interface between the second protrusion 5z6 and the second filter layer 62 instead of total internal reflection. Furthermore, the incident light rays are positioned on the side where the normal is closer to the display back panel 10. After refraction at the interface between the second protrusion 5z6 and the second filter layer 62, the outgoing light rays are deflected towards the normal viewing angle, thereby improving the light extraction efficiency.

[0259] Moreover, the first sub-pixel 351 and the second sub-pixel 352 improve light emission efficiency in different ways, which can reduce or even avoid color shift caused by different gains in light emission efficiency of sub-pixels 35 of different colors. This effectively improves the light emission efficiency of both the first sub-pixel 351 and the second sub-pixel 352, thereby improving the light emission efficiency of the display panel.

[0260] Furthermore, in situations with strong ambient light, after the ambient light passes through the second filter layer 62, only green light enters the display panel. After being reflected by the display panel, only green light exits the display panel, thus achieving the purpose of anti-glare.

[0261] The angle between the sidewall of the second protrusion 5z6 and the first reference plane is greater than or equal to 55° and less than or equal to 85°. For example, the angle between the sidewall of the second protrusion 5z6 and the first reference plane can be 57°, 60°, 63°, 65°, 68°, 70°, 72°, 75°, 77°, 80°, 83°, etc.

[0262] If the angle between the sidewall of the second protrusion 5z6 and the first reference plane is too large, making the sidewall of the second protrusion 5z6 almost perpendicular to the display back panel 10, when the second filter layer 62 covers the sidewall of the second protrusion 5z6, it cannot fill the corner formed by the second protrusion 5z6 and the display back panel 10. That is, gaps are easily formed at the corner formed by the second protrusion 5z6 and the display back panel 10, which cannot achieve reflection well, loses the reflective surface and thus cannot achieve the converging effect of the emitted light well.

[0263] If the angle between the sidewall of the second protrusion 5z6 and the first reference plane is too small, making the sidewall of the second protrusion 5z6 relatively flat, since the outgoing light emitted from the second sub-pixel 352 is emitted from the second protrusion 5z6 to the second filter layer 62 from the optically dense medium to the optically sparse medium, the light with a large tilt angle is prone to total internal reflection at the interface, resulting in the inability to emit. Even if some light is refracted and emitted, it will still have a diffusion effect on the light.

[0264] The aforementioned numerical range allows for the adjustment of the angle of the outgoing light emitted from the second sub-pixel 352 at the interface between the second protrusion 5z6 and the second filter layer 62, and also enables the light to converge through refraction.

[0265] The thickness of the second protrusion 5z6 is greater than or equal to 1.5 micrometers and less than or equal to 2.5 micrometers. For example, the thickness of the second protrusion 5z6 can be 1.55 micrometers, 1.6 micrometers, 1.65 micrometers, 1.7 micrometers, 1.75 micrometers, 1.8 micrometers, 1.85 micrometers, 1.9 micrometers, 1.95 micrometers, 2 micrometers, 2.05 micrometers, 2.1 micrometers, 2.15 micrometers, 2.2 micrometers, 2.25 micrometers, 2.3 micrometers, 2.35 micrometers, 2.4 micrometers, 2.45 micrometers, etc.

[0266] The thickness of the second filter layer 62 is greater than or equal to 3 micrometers and less than or equal to 5 micrometers. For example, the thickness of the second filter layer 62 can be 3.2 micrometers, 3.5 micrometers, 3.7 micrometers, 4 micrometers, 4.3 micrometers, 4.5 micrometers, 4.8 micrometers, etc.

[0267] Referring to Figures 28–36, the insulating layer group 5z may include a third protrusion 5z7, the orthographic projection of the third protrusion 5z7 on the display back panel 10 at least partially overlapping with the third sub-pixel 353.

[0268] Referring to Figures 28–36, the third protrusion 5z7 may include a sidewall and a top wall, with the top wall parallel to the display surface and the sidewall intersecting the display surface. The third protrusion 5z7 and the third sub-pixel 353 may correspond one-to-one. Specifically, the number of third protrusions 5z7 is the same as the number of third sub-pixels 353, and the shape of the third protrusion 5z7 is the same as the shape of the third sub-pixel 353. For example, if the third sub-pixel 353 is circular, the third protrusion 5z7 is also circular; if the third sub-pixel 353 is rectangular, the third protrusion 5z7 is also rectangular. Of course, in other exemplary embodiments of this disclosure, the shapes of the third sub-pixel 353 and the third protrusion 5z7 may also be other shapes, which will not be described in detail here.

[0269] The orthographic projection of the third protrusion 5z7 on the display back panel 10 at least partially overlaps with the third sub-pixel 353. For example, the edge line of the orthographic projection of the third protrusion 5z7 on the display back panel 10 may coincide with the edge line of the third sub-pixel 353, or the orthographic projection of the third protrusion 5z7 on the display back panel 10 may cover and be larger than the third sub-pixel 353. In both cases, the orthographic projection of the third protrusion 5z7 on the display back panel 10 completely covers the third sub-pixel 353. In this case, the distance between the edge line of the orthographic projection of the third protrusion 5z7 on the display back panel 10 and the edge line of the third sub-pixel 353 in the first direction X is greater than or equal to 0.5 micrometers and less than or equal to 2 micrometers. For example, the distance between the edge line of the orthographic projection of the third protrusion 5z7 on the display back panel 10 and the edge line of the third sub-pixel 353 in the first direction X may be 0.8 micrometers, 1 micrometer, 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, etc.

[0270] Of course, in some other example embodiments of this disclosure, a portion of the orthographic projection of the third protrusion 5z7 onto the display back panel 10 may overlap with a portion of the third sub-pixel 353.

[0271] It should be noted that since the sidewall of the third protrusion 5z7 is inclined, when compared with the third sub-pixel 353, the range of the orthographic projection of the third protrusion 5z7 on the display back panel 10 refers to the orthographic projection of the side (bottom wall) of the third protrusion 5z7 closest to the display back panel 10 on the display back panel 10, that is, the orthographic projection of the bottom wall of the third protrusion 5z7 on the display back panel 10 at least partially overlaps with the third sub-pixel 353.

[0272] The distance between the sidewall of the third protrusion 5z7 and the center of the third sub-pixel 353 in the first direction X increases as the height of the sidewall of the third protrusion 5z7 in the second direction Y decreases, so that the third protrusion 5z7 forms a roughly frustum-shaped structure with the top smaller than the bottom.

[0273] In some exemplary embodiments of this disclosure, the sidewall of the third protrusion 5z7 may include a curved surface; the sidewall of the third protrusion 5z7 may include a thirteenth portion, a fourteenth portion, and a fifteenth portion that are smoothly connected in sequence, the thirteenth portion being closer to the display back panel 10 than the fifteenth portion, the fourteenth portion being a slope, and the thirteenth and fifteenth portions being arc surfaces. The thirteenth portion may be recessed, and the fifteenth portion may be protruding. Specifically, the portion of the sidewall of the third protrusion 5z7 near the display back panel 10 may be an arc surface, the middle portion of the sidewall of the third protrusion 5z7 may be a slope, and the portion of the sidewall of the third protrusion 5z7 away from the display back panel 10 may be an arc surface. In other exemplary embodiments of this disclosure, the sidewall of the third protrusion 5z7 may be a slope, and the sidewall of the third protrusion 5z7 may only include the smoothly connected thirteenth and fifteenth portions, but the sidewall of the third protrusion 5z7 is generally inclined.

[0274] The third light filter layer 63 is disposed on the side of the third protrusion 5z7 opposite to the display back panel 10. The third light filter layer 63 can be a blue light filter layer, that is, the third light filter layer 63 can only allow blue light to pass through. The third light filter layer 63 covers at least a portion of the sidewall of the third protrusion 5z7. For example, the third light filter layer 63 can cover all the sidewalls of the third protrusion 5z7, or the third light filter layer 63 can cover only a portion of the sidewalls of the third protrusion 5z7.

[0275] The following explanation will be based on the example that the third filter layer 63 can cover all the sidewalls of the third protrusion 5z7.

[0276] The refractive index of the third filter layer 63 is less than that of the third protrusion 5z7. Specifically, the refractive index of the third filter layer 63 is greater than or equal to 1.55 and less than or equal to 1.65. For example, the refractive index of the third filter layer 63 can be 1.58, 1.6, 1.62, etc. The refractive index of the third protrusion 5z7 is greater than or equal to 1.7 and less than or equal to 1.85, that is, the refractive index of the insulating layer 5a on which the third protrusion 5z7 is provided is greater than or equal to 1.7 and less than or equal to 1.85. For example, the refractive index of the third protrusion 5z7 can be 1.72, 1.75, 1.77, 1.8, 1.82, etc.

[0277] Light rays traveling from the third protrusion 5z7 to the third filter layer 63 travel from a denser medium to a less dense medium. The sidewall of the third protrusion 5z7 can adjust the incident angle of the light rays emitted from the third sub-pixel 353 at the interface between the third protrusion 5z7 and the third filter layer 63, making the incident angle smaller. As a result, refraction can occur at the interface between the third protrusion 5z7 and the third filter layer 63 instead of total internal reflection. Furthermore, the incident light rays are positioned on the side where the normal is closer to the display back panel 10. After refraction at the interface between the third protrusion 5z7 and the third filter layer 63, the outgoing light rays are deflected towards the normal viewing angle, thereby improving the light extraction efficiency.

[0278] Moreover, the first sub-pixel 351 and the third sub-pixel 353 improve light emission efficiency in different ways, which can reduce or even avoid color shift caused by different gains in light emission efficiency of sub-pixels 35 of different colors. This effectively improves the light emission efficiency of both the first sub-pixel 351 and the third sub-pixel 353, thereby improving the light emission efficiency of the display panel.

[0279] Furthermore, in situations with strong ambient light, after the ambient light passes through the third filter layer 63, only blue light enters the display panel. After being reflected by the display panel, only blue light exits the display panel, thus achieving the purpose of anti-glare.

[0280] The angle between the sidewall of the third protrusion 5z7 and the first reference plane is greater than or equal to 55° and less than or equal to 85°. For example, the angle between the sidewall of the third protrusion 5z7 and the first reference plane can be 57°, 60°, 63°, 65°, 68°, 70°, 72°, 75°, 77°, 80°, 83°, etc.

[0281] If the angle between the sidewall of the third protrusion 5z7 and the first reference plane is too large, making the sidewall of the third protrusion 5z7 almost perpendicular to the display back panel 10, when the third filter layer 63 covers the sidewall of the third protrusion 5z7, it cannot fill the corner formed by the third protrusion 5z7 and the display back panel 10. That is, gaps are easily formed at the corner formed by the third protrusion 5z7 and the display back panel 10, which cannot achieve reflection well, loses the reflective surface and thus cannot achieve the converging effect of the emitted light well.

[0282] If the angle between the sidewall of the third protrusion 5z7 and the first reference plane is too small, making the sidewall of the third protrusion 5z7 relatively flat, since the outgoing light emitted from the third sub-pixel 353 is emitted from the third protrusion 5z7 to the third filter layer 63 from the optically dense medium to the optically sparse medium, the light with a large tilt angle is prone to total internal reflection at the interface, resulting in the inability to emit. Even if some light is refracted and emitted, it will still have a diffusion effect on the light.

[0283] The aforementioned numerical range allows for the adjustment of the angle of the outgoing light emitted from the third sub-pixel 353 at the interface between the third protrusion 5z7 and the third filter layer 63, and also enables the light to converge through refraction.

[0284] The thickness of the third protrusion 5z7 is greater than or equal to 1.5 micrometers and less than or equal to 2.5 micrometers. For example, the thickness of the third protrusion 5z7 can be 1.55 micrometers, 1.6 micrometers, 1.65 micrometers, 1.7 micrometers, 1.75 micrometers, 1.8 micrometers, 1.85 micrometers, 1.9 micrometers, 1.95 micrometers, 2 micrometers, 2.05 micrometers, 2.1 micrometers, 2.15 micrometers, 2.2 micrometers, 2.25 micrometers, 2.3 micrometers, 2.35 micrometers, 2.4 micrometers, 2.45 micrometers, etc.

[0285] The thickness of the third filter layer 63 is greater than or equal to 3 micrometers and less than or equal to 5 micrometers. For example, the thickness of the third filter layer 63 can be 3.2 micrometers, 3.5 micrometers, 3.7 micrometers, 4 micrometers, 4.3 micrometers, 4.5 micrometers, 4.8 micrometers, etc.

[0286] In some exemplary embodiments of this disclosure, referring to Figures 28-36, the insulating layer 5a of the first recess 5z1 is set as the first insulating layer, the insulating layer 5a of the second protrusion 5z6 is set as the second insulating layer, and the insulating layer 5a of the third protrusion 5z7 is set as the third insulating layer; the distance between the side of the first recess 5z1 near the display back panel 10 and the display back panel 10 is the first distance, that is, the distance between the first insulating layer and the display back panel 10 is the first distance. Specifically, the distance between the side of the first insulating layer near the display back panel 10 and the display back panel 10 can be the first distance; the second protrusion 5z7... The distance between the side of the protruding part 5z6 near the display back panel 10 and the display back panel 10 is the second distance, that is, the distance between the second insulating layer and the display back panel 10 is the second distance. Specifically, the distance between the side of the second insulating layer near the display back panel 10 and the display back panel 10 can be the second distance. The distance between the side of the third protruding part 5z7 near the display back panel 10 and the display back panel 10 is the third distance, that is, the distance between the third insulating layer and the display back panel 10 can be the third distance. Specifically, the distance between the side of the third insulating layer near the display back panel 10 and the display back panel 10 can be the third distance.

[0287] The first recess 5z1 or the second protrusion 5z6 corresponding to the side of the display back panel 10 that is close to the display back panel 10 is small. For example, when the refractive index of the second filter layer 62 is less than that of the first filter layer 61, the second distance is greater than the first distance, that is, the height of the second insulating layer in the second direction Y is higher than the height of the first insulating layer in the second direction Y.

[0288] The first recess 5z1 or the third protrusion 5z7 corresponding to the side of the display back panel 10 that is closer to the display back panel 10 is smaller than the side of the first recess 5z1 or the third protrusion 5z7 that is closer to the display back panel 10. For example, when the refractive index of the third filter layer 63 is less than the refractive index of the first filter layer 61, the third distance is greater than the first distance, that is, the height of the third insulating layer in the second direction Y is higher than the height of the first insulating layer in the second direction Y.

[0289] Referring to Figures 28 and 38, the greater the distance between the insulating layer 5a, which produces total internal reflection or refraction of light, and the sub-pixel 35, the smaller the exit angle of the light that produces total internal reflection or refraction (for example, α2 is less than α1 and α3 is less than α1 in Figure 28). This means the angle of the adjustable light is smaller, the number of adjustable light rays is greater, and the field of view of the adjustable light rays is smaller, thereby improving the light extraction efficiency and light intensity ratio of the corresponding sub-pixel 35. Therefore, a second distance greater than the first distance can improve the light extraction efficiency of the second sub-pixel 352, reducing or even avoiding color shift caused by different gains in the light extraction efficiency of sub-pixels 35 of different colors. Similarly, a third distance greater than the first distance can improve the light extraction efficiency of the third sub-pixel 353, reducing or even avoiding color shift caused by different gains in the light extraction efficiency of sub-pixels 35 of different colors.

[0290] Of course, in some other exemplary embodiments of this disclosure, referring to Figures 34-36, the refractive index of the third filter layer 63 may be greater than that of the first filter layer 61, and the refractive index of the second filter layer 62 may be greater than that of the first filter layer 61. In this case, the second distance is less than the first distance, and the third distance is less than the first distance. This setting can improve the light emission efficiency of the first sub-pixel 351 and reduce or even avoid color shift caused by the different gains in the light emission efficiency of sub-pixels 35 of different colors.

[0291] Referring to Figures 28-31 and 34-37, in some exemplary embodiments of this disclosure, the second insulating layer and the third insulating layer can be the same insulating layer 5a, that is, the second distance is equal to the third distance. Alternatively, the second protrusion 5z6 and the third protrusion 5z7 can be disposed on the same insulating layer 5a. This situation is generally applicable when the refractive index of the second filter layer 62 is substantially the same as the refractive index of the third filter layer 63, so that the light emission efficiency of the second sub-pixel 352 is substantially the same as the light emission efficiency of the third sub-pixel 353.

[0292] Referring to FIG33, in some exemplary embodiments of this disclosure, the second distance may be greater than the third distance, that is, the height of the second insulating layer in the second direction Y is higher than the height of the third insulating layer in the second direction Y. This situation is generally applicable when the refractive index of the second filter layer 62 is less than the refractive index of the third filter layer 63 and is substantially the same, thereby improving the light extraction efficiency of the second sub-pixel 352 so that the light extraction efficiency of the second sub-pixel 352 is substantially the same as that of the third sub-pixel 353.

[0293] Referring to FIG32, in some exemplary embodiments of this disclosure, the second distance may be less than the third distance, that is, the height of the second insulating layer in the second direction Y is lower than the height of the third insulating layer in the second direction Y. This situation is generally applicable when the refractive index of the second filter layer 62 is greater than the refractive index of the third filter layer 63 and is substantially the same, thereby improving the light extraction efficiency of the third sub-pixel 353 so that the light extraction efficiency of the second sub-pixel 352 is substantially the same as that of the third sub-pixel 353.

[0294] Referring to Figures 28-30 and 32-35, the second protrusion 5z6 is a single-layer structure, that is, the second protrusion 5z6 is formed by patterning an insulating layer 5a; the third protrusion 5z7 is a single-layer structure, that is, the third protrusion 5z7 is formed by patterning an insulating layer 5a.

[0295] Referring to Figures 31 and 36, the second protrusion 5z6 is configured as a double-layer structure, that is, the second protrusion 5z6 is formed by patterning two insulating layers 5a; the third protrusion 5z7 is configured as a double-layer structure, that is, the third protrusion 5z7 is formed by patterning two insulating layers 5a.

[0296] Of course, in some other example embodiments of this disclosure, the second protrusion 5z6 may be configured as a single-layer structure and the third protrusion 5z7 as a double-layer structure; or the second protrusion 5z6 may be configured as a double-layer structure and the third protrusion 5z7 as a single-layer structure.

[0297] In the case where the touch layer group 5 may include a base layer 51, a first touch functional layer 52, a touch insulating layer 53, a second touch functional layer 54, and a protective layer 55 stacked sequentially, the base layer 51, the touch insulating layer 53, and the protective layer 55 are all insulating layers 5a. Referring to FIG28, in some example embodiments of this disclosure, the first recess 5z1 may be provided on the base layer 51, and the second protrusion 5z6 and the third protrusion 5z7 may be provided on the touch insulating layer 53. The specific process is as follows: the base layer 51 is prepared and patterned to form the first recess 5z1, and then the first filter layer 61 and the first touch functional layer 52 are prepared sequentially; then, the touch insulating layer 53 is prepared and patterned to form the second protrusion 5z6 and the third protrusion 5z7, and then the second filter layer 62 and the third filter layer 63 are prepared sequentially; next, the second touch functional layer 54 and the protective layer 55 are prepared sequentially. In this case, the refractive index of the substrate layer 51 is relatively low, for example, the refractive index of the substrate layer 51 can be greater than or equal to 1.45 and less than or equal to 1.55; the refractive index of the touch insulating layer 53 is relatively high, for example, the refractive index of the touch insulating layer 53 can be greater than or equal to 1.7 and less than or equal to 1.85; and the refractive index of the protective layer 55 is relatively low, for example, the refractive index of the protective layer 55 can be greater than or equal to 1.45 and less than or equal to 1.55.

[0298] Referring to FIG29, the first recessed portion 5z1 can be disposed on the base layer 51, and the second protrusion 5z6 and the third protrusion 5z7 can be disposed on the protective layer 55. The specific process is as follows: the base layer 51 is prepared and patterned to form the first recessed portion 5z1, and then the first filter layer 61, the first touch functional layer 52, the touch insulating layer 53, the second touch functional layer 54 and the protective layer 55 are prepared in sequence. The protective layer 55 is patterned to form the second protrusion 5z6 and the third protrusion 5z7. Then, the second filter layer 62 and the third filter layer 63 are prepared in sequence. In this case, the refractive index of the substrate layer 51 is relatively low, for example, the refractive index of the substrate layer 51 can be greater than or equal to 1.45 and less than or equal to 1.55; the refractive index of the protective layer 55 is relatively high, for example, the refractive index of the protective layer 55 can be greater than or equal to 1.7 and less than or equal to 1.85; and the refractive index of the touch insulating layer 53 is relatively low, for example, the refractive index of the touch insulating layer 53 can be greater than or equal to 1.45 and less than or equal to 1.55.

[0299] Referring to FIG30, the first recessed portion 5z1 can be disposed on the touch insulating layer 53, and the second protrusion 5z6 and the third protrusion 5z7 can be disposed on the protective layer 55. The specific process is as follows: the base layer 51, the first touch functional layer 52 and the touch insulating layer 53 are prepared sequentially, and the touch insulating layer 53 is patterned to form the first recessed portion 5z1. Then, the first filter layer 61, the second touch functional layer 54 and the protective layer 55 are prepared sequentially, and the protective layer 55 is patterned to form the second protrusion 5z6 and the third protrusion 5z7. Then, the second filter layer 62 and the third filter layer 63 are prepared sequentially. In this case, the refractive index of the touch insulating layer 53 is low, for example, the refractive index of the touch insulating layer 53 can be greater than or equal to 1.45 and less than or equal to 1.55; the refractive index of the protective layer 55 is high, for example, the refractive index of the protective layer 55 can be greater than or equal to 1.7 and less than or equal to 1.85; and the refractive index of the base layer 51 is low, for example, the refractive index of the base layer 51 can be greater than or equal to 1.45 and less than or equal to 1.55.

[0300] Referring to FIG32, the first recessed portion 5z1 can be disposed on the base layer 51, the second protrusion 5z6 can be disposed on the touch insulating layer 53, and the third protrusion 5z7 can be disposed on the protective layer 55. The specific process is as follows: the base layer 51 is prepared and patterned to form the first recessed portion 5z1, and then the first filter layer 61 and the first touch functional layer 52 are prepared in sequence; then, the touch insulating layer 53 is prepared and patterned to form the second protrusion 5z6, and then the second filter layer 62, the second touch functional layer 54 and the protective layer 55 are prepared in sequence, and the protective layer 55 is patterned to form the third protrusion 5z7. Finally, the third filter layer 63 is prepared. In this case, the refractive index of the substrate 51 is low, for example, the refractive index of the substrate 51 can be greater than or equal to 1.45 and less than or equal to 1.55; the refractive index of the touch insulating layer 53 and the protective layer 55 is high, for example, the refractive index of the touch insulating layer 53 and the protective layer 55 can be greater than or equal to 1.7 and less than or equal to 1.85.

[0301] Referring to FIG33, the first recessed portion 5z1 can be disposed on the base layer 51, the second protrusion 5z6 can be disposed on the protective layer 55, and the third protrusion 5z7 can be disposed on the touch insulating layer 53. The specific process is as follows: the base layer 51 is prepared and patterned to form the first recessed portion 5z1, and then the first filter layer 61 and the first touch functional layer 52 are prepared in sequence; then the touch insulating layer 53 is prepared and patterned to form the third protrusion 5z7, and then the third filter layer 63, the second touch functional layer 54 and the protective layer 55 are prepared in sequence, and the protective layer 55 is patterned to form the second protrusion 5z6, and then the second filter layer 62 is prepared. In this case, the refractive index of the substrate 51 is low, for example, the refractive index of the substrate 51 can be greater than or equal to 1.45 and less than or equal to 1.55; the refractive index of the touch insulating layer 53 and the protective layer 55 is high, for example, the refractive index of the touch insulating layer 53 and the protective layer 55 can be greater than or equal to 1.7 and less than or equal to 1.85.

[0302] Referring to FIG34, the first recessed portion 5z1 can be disposed on the protective layer 55, and the second protrusion 5z6 and the third protrusion 5z7 can be disposed on the base layer 51. The specific process is as follows: the base layer 51 is prepared and patterned to form the second protrusion 5z6 and the third protrusion 5z7, and then the second filter layer 62, the third filter layer 63, the first touch functional layer 52, the touch insulating layer 53, the second touch functional layer 54 and the protective layer 55 are prepared in sequence, and the protective layer 55 is patterned to form the first recessed portion 5z1, and then the first filter layer 61 is prepared. In this case, the refractive index of the protective layer 55 is relatively low, for example, the refractive index of the protective layer 55 can be greater than or equal to 1.45 and less than or equal to 1.55; the refractive index of the base layer 51 is relatively high, for example, the refractive index of the base layer 51 can be greater than or equal to 1.7 and less than or equal to 1.85; and the refractive index of the touch insulating layer 53 is relatively low, for example, the refractive index of the touch insulating layer 53 can be greater than or equal to 1.45 and less than or equal to 1.55.

[0303] Referring to FIG35, the first recessed portion 5z1 can be disposed on the touch insulating layer 53, and the second protrusion 5z6 and the third protrusion 5z7 can be disposed on the base layer 51. The specific process is as follows: the base layer 51 is prepared and patterned to form the second protrusion 5z6 and the third protrusion 5z7, and then the second filter layer 62, the third filter layer 63, the first touch functional layer 52 and the touch insulating layer 53 are prepared in sequence, and the touch insulating layer 53 is patterned to form the first recessed portion 5z1, and then the first filter layer 61, the second touch functional layer 54 and the protective layer 55 are prepared in sequence. In this case, the refractive index of the touch insulating layer 53 is relatively low. For example, the refractive index of the touch insulating layer 53 can be greater than or equal to 1.45 and less than or equal to 1.55; the refractive index of the base layer 51 is relatively high. For example, the refractive index of the base layer 51 can be greater than or equal to 1.7 and less than or equal to 1.85; and the refractive index of the protective layer 55 is relatively low. For example, the refractive index of the protective layer 55 can be greater than or equal to 1.45 and less than or equal to 1.55.

[0304] Referring to FIG31, the first recessed portion 5z1 may be disposed on the base layer 51, the second protrusion 5z6 may be disposed on the touch insulating layer 53 and the protective layer 55, and the third protrusion 5z7 may be disposed on the touch insulating layer 53 and the protective layer 55. Specifically, the touch insulating layer 53 may include a first sub-protrusion 5z61 and a second sub-protrusion 5z71 disposed at intervals, and the protective layer 55 may include a third sub-protrusion 5z62 and a fourth sub-protrusion 5z72 disposed at intervals. The third sub-protrusion 5z62 is disposed on the side of the first sub-protrusion 5z61 opposite to the display back panel 10, and the fourth sub-protrusion 5z72 is disposed on the side of the second sub-protrusion 5z71 opposite to the display back panel 10. The second protrusion 5z6 may include the first sub-protrusion 5z61 and the third sub-protrusion 5z62 stacked together, and the third protrusion 5z7 may include the second sub-protrusion 5z71 and the fourth sub-protrusion 5z72 stacked together. The specific process involves preparing a base layer 51 and patterning it to form a first recessed portion 5z1. Then, a first filter layer 61, a first touch functional layer 52, a touch insulating layer 53, a second touch functional layer 54, and a protective layer 55 are sequentially prepared. Simultaneously, the touch insulating layer 53 and the protective layer 55 are patterned to form a second protrusion 5z6 and a third protrusion 5z7. Finally, a second filter layer 62 and a third filter layer 63 are sequentially prepared. In this case, the refractive index of the base layer 51 is relatively low; for example, the refractive index of the base layer 51 can be greater than or equal to 1.45 and less than or equal to 1.55. The refractive indices of the touch insulating layer 53 and the protective layer 55 are relatively high; for example, the refractive indices of the touch insulating layer 53 and the protective layer 55 can be greater than or equal to 1.7 and less than or equal to 1.85.

[0305] Referring to FIG36, the first recessed portion 5z1 may be disposed on the protective layer 55, the second protrusion 5z6 may be disposed on the base layer 51 and the touch insulating layer 53, and the third protrusion 5z7 may be disposed on the base layer 51 and the touch insulating layer 53. Specifically, the base layer 51 may include a first sub-protrusion 5z61 and a second sub-protrusion 5z71 disposed at intervals, and the touch insulating layer 53 may include a third sub-protrusion 5z62 and a fourth sub-protrusion 5z72 disposed at intervals. The third sub-protrusion 5z62 is disposed on the side of the first sub-protrusion 5z61 opposite to the display back panel 10, and the fourth sub-protrusion 5z72 is disposed on the side of the second sub-protrusion 5z71 opposite to the display back panel 10. The second protrusion 5z6 may include the first sub-protrusion 5z61 and the third sub-protrusion 5z62 stacked together, and the third protrusion 5z7 may include the second sub-protrusion 5z71 and the fourth sub-protrusion 5z72 stacked together. The specific process involves sequentially fabricating a base layer 51, a first touch functional layer 52, and a touch insulating layer 53. The base layer 51 and the touch insulating layer 53 are simultaneously patterned to form a second protrusion 5z6 and a third protrusion 5z7. Then, a second filter layer 62, a third filter layer 63, a second touch functional layer 54, and a protective layer 55 are sequentially fabricated. The protective layer 55 is patterned to form a first recess 5z1, and then the first filter layer 61 is fabricated. In this case, the refractive index of the protective layer 55 is relatively low; for example, the refractive index of the protective layer 55 can be greater than or equal to 1.45 and less than or equal to 1.55. The refractive indices of the base layer 51 and the touch insulating layer 53 are relatively high; for example, the refractive indices of the base layer 51 and the touch insulating layer 53 can be greater than or equal to 1.7 and less than or equal to 1.85.

[0306] When the first recess 5z1 is provided on the substrate 51, the first filter layer 61 does not completely cover the top surface of the substrate 51 facing away from the display back panel 10. Specifically, the circumferential width of the portion of the first filter layer 61 overlapping with the side of the substrate 51 facing away from the display back panel 10 is greater than or equal to 0 and less than or equal to 5 micrometers. For example, the circumferential width of the portion of the first filter layer 61 overlapping with the side of the substrate 51 facing away from the display back panel 10 can be 0.3 micrometers, 0.5 micrometers, 0.8 micrometers, 1 micrometer, 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, 2 micrometers, 2.5 micrometers, 3 micrometers, 3.5 micrometers, 4 micrometers, 4.5 micrometers, etc.

[0307] When the first recess 5z1 is located on the touch insulating layer 53, the first filter layer 61 does not completely cover the top surface of the touch insulating layer 53 facing away from the display back panel 10. Specifically, the circumferential width of the overlapping portion of the first filter layer 61 and the side of the touch insulating layer 53 facing away from the display back panel 10 is greater than or equal to 0 and less than or equal to 5 micrometers. For example, the circumferential width of the overlapping portion of the first filter layer 61 and the side of the touch insulating layer 53 facing away from the display back panel 10 can be 0.3 micrometers, 0.5 micrometers, 0.8 micrometers, 1 micrometer, 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, 2 micrometers, 2.5 micrometers, 3 micrometers, 3.5 micrometers, 4 micrometers, 4.5 micrometers, etc.

[0308] When the first recess 5z1 is provided on the protective layer 55, the first filter layer 61 does not completely cover the top surface of the protective layer 55 facing away from the display back panel 10. Specifically, the circumferential width of the overlapping portion of the first filter layer 61 and the protective layer 55 facing away from the display back panel 10 is greater than or equal to 0 and less than or equal to 5 micrometers. For example, the circumferential width of the overlapping portion of the first filter layer 61 and the protective layer 55 facing away from the display back panel 10 can be 0.3 micrometers, 0.5 micrometers, 0.8 micrometers, 1 micrometer, 1.2 micrometers, 1.5 micrometers, 1.7 micrometers, 2 micrometers, 2.5 micrometers, 3 micrometers, 3.5 micrometers, 4 micrometers, 4.5 micrometers, etc.

[0309] Referring to Figures 1-36, the display panel may further include a light-shielding layer 7 and a second planarization layer 8. The light-shielding layer 7 is disposed on the side of the touch layer group 5 opposite to the display back panel 10. The light-shielding layer 7 is provided with a first via 71, a second via 72, and a third via 73. The orthographic projection of the first via 71 on the display back panel 10 covers the first sub-pixel 351, and the area of ​​the orthographic projection of the first via 71 on the display back panel 10 is larger than the area of ​​the first sub-pixel 351. The orthographic projection of the second via 72 on the display back panel 10 covers the second sub-pixel 352, and the area of ​​the orthographic projection of the second via 72 on the display back panel 10 is larger than the area of ​​the second sub-pixel 352. The orthographic projection of the third via 73 on the display back panel 10 covers the third sub-pixel 353, and the area of ​​the orthographic projection of the third via 73 on the display back panel 10 is larger than the area of ​​the third sub-pixel 353. This configuration avoids the light-shielding layer 7 from blocking the forward light emission efficiency of the first sub-pixel 351, the second sub-pixel 352, and the third sub-pixel 353.

[0310] Referring to Figures 1-27, in some exemplary embodiments of this disclosure, the orthographic projection of the light-shielding layer 7 on the display back panel 10 does not overlap with the orthographic projections of the first recess 5z1, the second recess 5z2, and the third recess 5z3 on the display back panel 10. The light-shielding layer 7 can extend up to the edges of the first recess 5z1, the second recess 5z2, and the third recess 5z3, thereby preventing the light-shielding layer 7 from blocking the sidewalls of the first recess 5z1, the second recess 5z2, and the third recess 5z3, and preventing the light-shielding layer 7 from affecting the light emission efficiency of the display panel.

[0311] Referring to Figures 28-36, in some exemplary embodiments of this disclosure, the orthographic projection of the light-shielding layer 7 on the display back panel 10 does not overlap with the orthographic projections of the first recess 5z1, the second protrusion 5z6, and the third protrusion 5z7 on the display back panel 10; the light-shielding layer 7 can extend up to the edges of the first recess 5z1, the second protrusion 5z6, and the third protrusion 5z7, to prevent the light-shielding layer 7 from blocking the sidewalls of the first recess 5z1, the second protrusion 5z6, and the third protrusion 5z7, and to prevent the light-shielding layer 7 from affecting the light emission efficiency of the display panel.

[0312] The second planarization layer 8 is disposed on the side of the light-shielding layer 7 away from the display back panel 10. The second planarization layer 8 can protect and planarize the display panel, which is beneficial for subsequent bonding with the cover plate. The material of the second planarization layer 8 can be resin. The refractive index of the second planarization layer 8 is low. Specifically, the refractive index of the second planarization layer 8 can be greater than or equal to 1.45 and less than or equal to 1.5. For example, the refractive index of the second planarization layer 8 can be 1.46, 1.47, 1.48, 1.49, etc.

[0313] Based on the same inventive concept, this disclosure provides a display device that may include the display panel described in any of the above-described embodiments. The specific structure of the display panel has been described in detail above, and therefore will not be repeated here.

[0314] The specific type of display device is not particularly limited; any type of display device commonly used in the field is acceptable, such as mobile devices like mobile phones, wearable devices like watches, VR devices, etc. Those skilled in the art can make the appropriate selection based on the specific purpose of the display device, which will not be elaborated further here.

[0315] It should be noted that, in addition to the display panel, the display device also includes other necessary components and parts. Taking the monitor as an example, these include, for instance, the casing, circuit board, power cord, etc. Those skilled in the art can supplement these components according to the specific usage requirements of the display device, and will not be elaborated here.

[0316] Compared with the prior art, the beneficial effects of the display device provided by the example embodiments of the present invention are the same as the beneficial effects of the display panel provided by the example embodiments described above, and will not be repeated here.

[0317] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

A display panel, wherein, include: The display back panel includes a first sub-pixel, a second sub-pixel, and a third sub-pixel; A touch layer group is disposed on the light-emitting side of the display back panel. The touch layer group includes an insulating layer group, which includes at least two insulating layers. A first recess is provided on the insulating layer group. The orthographic projection of the first recess on the display back panel at least partially overlaps with the first sub-pixel. A first filter layer is disposed on the light-emitting side of the display back panel, at least a portion of the first filter layer is located within the first recess, and the refractive index of the first filter layer is greater than the refractive index of the insulating layer in which the first recess is disposed; A second filter layer is disposed on the light-emitting side of the display back panel, and the refractive index of the second filter layer is different from that of the first filter layer; The insulating layer group is provided with a second recessed portion, the orthographic projection of the second recessed portion on the display back panel overlaps with the second sub-pixel at least partially, at least part of the second filter layer is located in the second recessed portion, the refractive index of the second filter layer is greater than the refractive index of the insulating layer in which the second recessed portion is provided, and the total reflection surface area of ​​the recessed portion corresponding to the one with the larger refractive index between the first filter layer and the second filter layer is smaller. Alternatively, the insulating layer group includes a second protrusion, the orthographic projection of the second protrusion on the display back panel at least partially overlapping the second sub-pixel, the second filter layer is disposed on the side of the second protrusion away from the display back panel and covers at least part of the sidewall of the second protrusion, the refractive index of the second filter layer is less than the refractive index of the second protrusion, and the distance between the first recess or the side of the second protrusion near the display back panel corresponding to the one with the larger refractive index of the first filter layer and the second filter layer is small. The display panel according to claim 1, wherein, The display panel also includes: A third filter layer is disposed on the light-emitting side of the display back panel, and the refractive index of the third filter layer is different from that of the first filter layer. The insulating layer group is provided with a third recess, the orthographic projection of the third recess on the display back panel overlaps at least partially with the third sub-pixel, at least part of the third filter layer is located in the third recess, the refractive index of the third filter layer is greater than the refractive index of the insulating layer in which the third recess is provided, and the total reflection surface area of ​​the recess corresponding to the one with the larger refractive index between the first filter layer and the third filter layer is smaller. Alternatively, the insulating layer group includes a third protrusion, the orthographic projection of which on the display back panel at least partially overlaps with the third sub-pixel, the third filter layer is disposed on the side of the third protrusion away from the display back panel and covers at least a portion of the sidewall of the third protrusion, the refractive index of the third filter layer is less than the refractive index of the insulating layer on which the third protrusion is disposed, and the distance between the first recess or the side of the third protrusion near the display back panel corresponding to the one with the larger refractive index of the first filter layer and the third filter layer and the display back panel is small. The display panel according to claim 2, wherein, The distance between the side of the first recessed portion near the display back panel and the display back panel is a first distance; the distance between the side of the second protrusion near the display back panel and the display back panel is a second distance; and the distance between the side of the third protrusion near the display back panel and the display back panel is a third distance. The refractive index of the third filter layer is less than that of the first filter layer, the refractive index of the second filter layer is less than that of the first filter layer, the second distance is greater than the first distance, and the third distance is greater than the first distance; Alternatively, the refractive index of the third filter layer is greater than that of the first filter layer, the refractive index of the second filter layer is greater than that of the first filter layer, the second distance is less than the first distance, and the third distance is less than the first distance. The display panel according to claim 3, wherein, The refractive index of the second filter layer is equal to the refractive index of the third filter layer, and the second distance is equal to the third distance; or, the refractive index of the second filter layer is less than the refractive index of the third filter layer, and the second distance is greater than the third distance; or, the refractive index of the second filter layer is greater than the refractive index of the third filter layer, and the second distance is less than the third distance. The display panel according to claim 3, wherein, The second protrusion is configured as a single-layer structure or a double-layer structure, and the third protrusion is configured as a single-layer structure or a double-layer structure. The display panel according to claim 5, wherein, The touch layer group includes a base layer, a first touch function layer, a touch insulating layer, a second touch function layer, and a protective layer stacked sequentially, wherein the base layer, the touch insulating layer, and the protective layer are all insulating layers; The first recess is disposed on the base layer, and the second and third protrusions are disposed on the touch insulating layer; or, the first recess is disposed on the base layer, and the second and third protrusions are disposed on the protective layer; or, the first recess is disposed on the touch insulating layer, and the second and third protrusions are disposed on the protective layer; or, the first recess is disposed on the base layer, the touch insulating layer includes a first sub-protrusion and a second sub-protrusion, the protective layer includes a third sub-protrusion and a fourth sub-protrusion, the third sub-protrusion is disposed on the side of the first sub-protrusion facing away from the display back panel, the fourth sub-protrusion is disposed on the side of the second sub-protrusion facing away from the display back panel, the second protrusion includes the first sub-protrusion and the third sub-protrusion, and the third protrusion includes the second sub-protrusion and the fourth sub-protrusion; or, the first recess is disposed on the base layer, and the second protrusion is disposed on the protective layer. A touch insulating layer, wherein the third protrusion is disposed on the protective layer; or, the first recess is disposed on the base layer, the second protrusion is disposed on the protective layer, and the third protrusion is disposed on the touch insulating layer; or, the first recess is disposed on the protective layer, and the second and third protrusions are disposed on the base layer; or, the first recess is disposed on the touch insulating layer, and the second and third protrusions are disposed on the base layer; or, the first recess is disposed on the protective layer, the base layer includes a first sub-protrusion and a second sub-protrusion, the touch insulating layer includes a third sub-protrusion and a fourth sub-protrusion, the third sub-protrusion is disposed on the side of the first sub-protrusion facing away from the display back panel, the fourth sub-protrusion is disposed on the side of the second sub-protrusion facing away from the display back panel, the second protrusion includes the first sub-protrusion and the third sub-protrusion, and the third protrusion includes the second sub-protrusion and the fourth sub-protrusion. The display panel according to claim 2, wherein, The first recess, the second recess, and the third recess are disposed on the same insulating layer. The display panel according to claim 7, wherein, The first recess, the second recess, and the third recess are provided on one layer of the insulating layer, or the first recess, the second recess, and the third recess are provided on two adjacent layers of the insulating layer. The display panel according to claim 8, wherein, The touch layer group includes a base layer, a first touch function layer, a touch insulating layer, a second touch function layer, and a protective layer stacked sequentially, wherein the base layer, the touch insulating layer, and the protective layer are all insulating layers; The first recess, the second recess, and the third recess are disposed on the base layer; or, the first recess, the second recess, and the third recess are disposed on the touch insulating layer; or, the first recess, the second recess, and the third recess are disposed on the protective layer; or, the base layer has a first sub-recess, a second sub-recess, and a third sub-recess, and the touch insulating layer has a fourth sub-recess, a fifth sub-recess, and a sixth sub-recess, wherein the first recess includes the fourth sub-recess and the first sub-recess that are interconnected, and the second recess includes the fourth sub-recess and the first sub-recess that are interconnected. The fifth sub-recessed portion and the second sub-recessed portion are connected, and the third sub-recessed portion includes the sixth sub-recessed portion and the third sub-recessed portion that are connected to each other; or, the touch insulating layer is provided with a first sub-recessed portion, a second sub-recessed portion and a third sub-recessed portion, and the protective layer is provided with a fourth sub-recessed portion, a fifth sub-recessed portion and a sixth sub-recessed portion, wherein the first sub-recessed portion includes the fourth sub-recessed portion and the first sub-recessed portion that are connected to each other, the second sub-recessed portion includes the fifth sub-recessed portion and the second sub-recessed portion that are connected to each other, and the third sub-recessed portion includes the sixth sub-recessed portion and the third sub-recessed portion that are connected to each other. The display panel according to claim 9, wherein, The refractive index of the first filter layer is greater than that of the second filter layer, and the refractive index of the first filter layer is greater than that of the third filter layer; the first recess is configured to be a shape adapted to the first sub-pixel, the second recess is configured to be a ring shape adapted to the second sub-pixel, and the third recess is configured to be a ring shape adapted to the third sub-pixel. And / or, the first recess is configured as a blind hole that does not penetrate the insulating layer, the second recess is configured as a through hole that penetrates the insulating layer, and the third recess is configured as a through hole that penetrates the insulating layer. The display panel according to claim 9, wherein, The touch layer group also includes: A functional layer is disposed between two adjacent insulating layers. The functional layer includes a dummy portion, which has a via. The orthographic projection of the via on the display back panel covers the first sub-pixel. The dummy portion extends at least to the sidewall of the first recess. The display panel according to claim 11, wherein, The functional layer is either the first touch functional layer or the second touch functional layer. The display panel according to claim 9, wherein, The projected area of ​​the fourth sub-recessed portion near the first sub-recessed portion on the display back panel is greater than the projected area of ​​the first sub-recessed portion near the fourth sub-recessed portion on the display back panel, so that the first recessed portion forms a stepped structure with an opening larger than the bottom. The display panel according to claim 6 or 9, wherein, The first touch function layer includes a bridging portion, the second touch function layer includes a touch electrode, the orthographic projection of the first filter layer on the display back panel does not overlap with the orthographic projections of the bridging portion and the touch electrode on the display back panel, the orthographic projection of the second filter layer on the display back panel does not overlap with the orthographic projections of the bridging portion and the touch electrode on the display back panel, and the orthographic projection of the third filter layer on the display back panel does not overlap with the orthographic projections of the bridging portion and the touch electrode on the display back panel. The display panel according to claim 11, wherein, The distance between the edge of the orthographic projection of the via on the display back panel and the edge of the first sub-pixel is greater than or equal to 0 and less than or equal to 1 micrometer; and / or, the distance between the edge of the orthographic projection of the via on the display back panel and the edge of the orthographic projection of the first recess on the display back panel is greater than or equal to 0 and less than or equal to 2 micrometers; and / or, the dummy part is configured as an annular shape, and the annular width of the dummy part is greater than or equal to 3 micrometers and less than or equal to 4 micrometers. The display panel according to claim 10, wherein, When the thickness of the insulating layer in the first recess is greater than or equal to 1.5 micrometers and less than or equal to 2.5 micrometers, and the first recess is configured as a blind hole that does not penetrate the insulating layer, the thickness of the insulating layer at the first recess is greater than or equal to 0.5 micrometers and less than or equal to 1 micrometer. The display panel according to any one of claims 2 to 13, 15, and 16, wherein, The orthographic projection of the first recess on the display back panel completely covers the first sub-pixel, and / or the orthographic projection of the second recess on the display back panel completely covers the second sub-pixel, and / or the orthographic projection of the third recess on the display back panel completely covers the third sub-pixel. Alternatively, the orthographic projection of the first recess on the display back panel completely covers the first sub-pixel, and / or, the orthographic projection of the second protrusion on the display back panel completely covers the second sub-pixel, and / or, the orthographic projection of the third protrusion on the display back panel completely covers the third sub-pixel. The display panel according to claim 17, wherein, The distance between the edge of the orthographic projection of the first recess on the display back panel and the edge of the first sub-pixel is greater than or equal to 0.5 micrometers and less than or equal to 2 micrometers, and / or the distance between the edge of the orthographic projection of the second recess on the display back panel and the edge of the second sub-pixel is greater than or equal to 0.5 micrometers and less than or equal to 2 micrometers, and / or the distance between the orthographic projection of the third recess on the display back panel and the edge of the third sub-pixel is greater than or equal to 0.5 micrometers and less than or equal to 2 micrometers; Alternatively, the distance between the edge of the orthographic projection of the first recess on the display back panel and the edge of the first sub-pixel is greater than or equal to 0.5 micrometers and less than or equal to 2 micrometers, and / or the distance between the edge of the orthographic projection of the second protrusion on the display back panel and the edge of the second sub-pixel is greater than or equal to 0.5 micrometers and less than or equal to 2 micrometers, and / or the distance between the orthographic projection of the third protrusion on the display back panel and the edge of the third sub-pixel is greater than or equal to 0.5 micrometers and less than or equal to 2 micrometers. The display panel according to any one of claims 2 to 13, 15, and 16, wherein, The distance between the sidewall of the first recess and the center of the first sub-pixel in the first direction increases as the height of the sidewall of the first recess in the second direction increases; The distance between the sidewall of the second recess and the center of the second sub-pixel in the first direction increases as the height of the sidewall of the second recess in the second direction increases; the distance between the sidewall of the third recess and the center of the third sub-pixel in the first direction increases as the height of the sidewall of the third recess in the second direction increases. Alternatively, when the second recess is annular, the distance between the outer annular sidewall of the second recess and the center of the second sub-pixel in the first direction increases as the height of the outer annular sidewall of the second recess in the second direction increases; the distance between the inner annular sidewall of the second recess and the center of the second sub-pixel in the first direction decreases as the height of the inner annular sidewall of the second recess in the second direction increases. When the third recess is annular, the distance between the outer annular sidewall of the third recess and the center of the third sub-pixel in the first direction increases as the height of the outer annular sidewall of the third recess in the second direction increases; the distance between the inner annular sidewall of the third recess and the center of the third sub-pixel in the first direction decreases as the height of the inner annular sidewall of the third recess in the second direction increases. Alternatively, the distance between the sidewall of the second protrusion and the center of the second sub-pixel in the first direction increases as the height of the sidewall of the second protrusion in the second direction decreases, and the distance between the sidewall of the third protrusion and the center of the third sub-pixel in the first direction increases as the height of the sidewall of the third protrusion in the second direction decreases. The second direction is perpendicular to the side of the display back panel where the touch layer group is disposed, and the first direction is parallel to the side of the display back panel where the touch layer group is disposed. The display panel according to claim 19, wherein, The sidewall of the first recess includes an inclined surface, and the angle between the sidewall of the first recess and the first reference plane is greater than or equal to 55° and less than or equal to 85°. The sidewall of the second recess includes an inclined surface, and the angle between the sidewall of the second recess and the first reference plane is greater than or equal to 55° and less than or equal to 85°; the sidewall of the third recess includes an inclined surface, and the angle between the sidewall of the third recess and the first reference plane is greater than or equal to 55° and less than or equal to 85°. Alternatively, the outer ring sidewall of the second recess includes a slope, and the angle between the outer ring sidewall of the second recess and the first reference plane is greater than or equal to 55° and less than or equal to 85°; the inner ring sidewall of the second recess includes a slope, and the angle between the inner ring sidewall of the second recess and the first reference plane is greater than or equal to 55° and less than or equal to 85°; the outer ring sidewall of the third recess includes a slope, and the angle between the outer ring sidewall of the third recess and the first reference plane is greater than or equal to 55° and less than or equal to 85°; the inner ring sidewall of the third recess includes a slope, and the angle between the inner ring sidewall of the third recess and the first reference plane is greater than or equal to 55° and less than or equal to 85°. Alternatively, the sidewall of the second protrusion includes an inclined surface, and the angle between the sidewall of the second protrusion and the first reference plane is greater than or equal to 55° and less than or equal to 85°; the sidewall of the third protrusion includes an inclined surface, and the angle between the sidewall of the third protrusion and the first reference plane is greater than or equal to 55° and less than or equal to 85°. The first reference plane is parallel to the side of the display back panel where the touch layer group is disposed. The display panel according to any one of claims 2 to 13, 15, and 16, wherein, The refractive index of the first filter layer is greater than or equal to 1.65 and less than or equal to 1.75, the refractive index of the second filter layer is greater than or equal to 1.55 and less than or equal to 1.65, and the refractive index of the third filter layer is greater than or equal to 1.55 and less than or equal to 1.

65. The refractive index of the insulating layer of the first recess, the second recess, and the third recess is set to be greater than or equal to 1.45 and less than or equal to 1.55; or, the refractive index of the insulating layer of the first recess is set to be greater than or equal to 1.45 and less than or equal to 1.55, the refractive index of the insulating layer of the second protrusion is set to be greater than or equal to 1.7 and less than or equal to 1.85, and the refractive index of the insulating layer of the third protrusion is set to be greater than or equal to 1.7 and less than or equal to 1.

85. The display panel according to any one of claims 2 to 13, 15, and 16, wherein, The display panel also includes: A light-shielding layer is disposed on the side of the touch layer group opposite to the display back panel. The light-shielding layer is provided with a first via, a second via, and a third via. The orthographic projection of the first via on the display back panel covers the first sub-pixel, the orthographic projection of the second via on the display back panel covers the second sub-pixel, and the orthographic projection of the third via on the display back panel covers the third sub-pixel. The orthographic projection of the light-shielding layer on the display back panel does not overlap with the orthographic projections of the first recess, the second recess, and the third recess on the display back panel, or the orthographic projection of the light-shielding layer on the display back panel does not overlap with the orthographic projections of the first recess, the second protrusion, and the third protrusion on the display back panel. The second planarization layer is disposed on the side of the light-shielding layer opposite to the display back panel. The display panel according to any one of claims 2 to 13, 15, and 16, wherein, The first sub-pixel is a red sub-pixel, the second sub-pixel is a green sub-pixel, and the third sub-pixel is a blue sub-pixel; the first filter layer is a red filter layer, the second filter layer is a green filter layer, and the third filter layer is a blue filter layer. The display panel according to any one of claims 1 to 13, 15, and 16, wherein, The insulating layer is made of organic materials. The display panel according to any one of claims 1 to 13, 15, and 16, wherein, The display back panel further includes an encapsulation layer group, which is disposed on the side of the touch layer group close to the first sub-pixel, the second sub-pixel and the third sub-pixel. A display device, wherein, include: The display panel according to any one of claims 1 to 25.

Images