A display panel and display device

Abstract

The application discloses a display panel and a display device, the display panel comprising a plurality of light emitting elements, a light filtering unit and a light folding unit sequentially arranged on the light emitting side of the light emitting elements; by reasonably adjusting the structure of the light filtering unit, the gap between the surfaces near the end of the light folding unit between each light filtering unit is reduced, the preparation process risk of the display panel film layer covering the light folding unit is reduced, the bottom angle θ n‑1 of the first end of any light folding unit and the bottom angle θ n of the second end meet the condition |θ n‑1 -θ n | / θ n‑1 ≤20%, through the structure design, the two ends of the same light folding unit can respectively emit the large viewing angle display light rays emitted by different light emitting elements towards the normal viewing angle after being deflected, and the angle range of the light rays emitted by the light emitting elements and deflected by the ends of the same light folding unit is approximately the same, so that the display brightness of the display panel is improved, the light extraction efficiency of the light rays emitted by different light emitting elements is balanced, color difference after color mixing of the light emitting elements is avoided, and normal display of the display panel is ensured.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a display panel and a display device. Background Technology

[0002] In display panels, the light extraction efficiency of the light-emitting elements varies, which affects the display effect of the display panel. Summary of the Invention

[0003] This invention provides a display panel and a display device. By reasonably adjusting the structure of the filter unit, the discontinuity between the first surfaces near the ends of the refractive units of each filter unit is reduced, which helps to balance the light extraction efficiency of the refractive units for light emitted from different light-emitting elements and ensures the normal display of the display panel.

[0004] In a first aspect, embodiments of the present invention provide a display panel including a plurality of light-emitting elements, a light-filtering structure located on the light-emitting side of the light-emitting elements, and a light-refractive structure located on the side of the light-filtering structure away from the light-emitting elements;

[0005] The filtering structure includes multiple filtering units, and the refractive structure includes a first refractive layer, which in turn includes multiple refractive units.

[0006] The refractive unit includes a first end and a second end distributed along a first direction; along the thickness direction of the display panel, the first end overlaps with a first filter unit, and the second end overlaps with a second filter unit, wherein the first direction is the direction from the first filter unit to the second filter unit;

[0007] The angle between the side of the first end and the first surface of the first end facing the first filter unit is θ1, and the angle between the side of the second end and the second surface of the second end facing the second filter unit is θ2, wherein |θ1-θ2| / θ1≤20%.

[0008] Secondly, embodiments of the present invention also provide a display device, which includes the display panel provided in the first aspect.

[0009] The display panel provided in this embodiment of the invention reduces the discontinuity between the first surfaces of each filter unit near the end of the refractive unit by reasonably adjusting the structure of the filter unit, thereby reducing the manufacturing process risk of the display panel film layer covering the refractive unit, and setting the bottom angle θ of the first end of any refractive unit. n-1 and the base angle θ at the second end n Satisfy |θ n-1 -θ n | / θ n-1≤20%, meaning that the bottom angles of the two ends of the refractive unit along the X direction in the figure are approximately equal, can deflect the wide-view display light emitted by different light-emitting elements at the two ends of the same refractive unit and then emit it towards the normal viewing angle. At the same time, the angle range of the light emitted by the light-emitting element being deflected by the end of the same refractive unit is approximately the same. While improving the display brightness of the display panel, it is also beneficial to balance the light extraction efficiency of the light emitted by different light-emitting elements, avoid color difference after the light-emitting elements mix, and ensure the normal display of the display panel. Attached Figure Description

[0010] Figure 1 This is a cross-sectional schematic diagram of a display panel provided by related technologies;

[0011] Figure 2 This is a schematic diagram of the surface of a display panel provided in an embodiment of the present invention;

[0012] Figure 3 yes Figure 2 A cross-sectional schematic diagram of a display panel in the AA' direction;

[0013] Figure 4 yes Figure 3 A schematic diagram of the light path emitted from the display panel in the image;

[0014] Figure 5 yes Figure 2 A cross-sectional schematic diagram of another display panel in the AA' direction;

[0015] Figure 6 yes Figure 2 A cross-sectional schematic diagram of another display panel in the AA' direction;

[0016] Figure 7 yes Figure 2 A cross-sectional schematic diagram of another display panel in the AA' direction;

[0017] Figure 8 yes Figure 3 A magnified view of a portion of region A in the middle;

[0018] Figure 9 yes Figure 8 A schematic diagram of the outgoing light path of the display panel in area A;

[0019] Figure 10 yes Figure 5 A magnified view of a portion of region B in the middle;

[0020] Figure 11 yes Figure 10 A schematic diagram of the outgoing light path of the display panel in area B;

[0021] Figure 12This is a schematic diagram of another display device provided in an embodiment of the present invention. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0023] Figure 1 This is a cross-sectional schematic diagram of a display panel provided by related technologies. For example... Figure 1 As shown, a display panel 100 in the related art includes a plurality of light-emitting elements 10 and a filter structure 12 and a refractive structure 13 sequentially located on the light-emitting side of the light-emitting elements 10; the filter structure 12 includes a plurality of filter units 121, the filter wavelength of the filter units 121 corresponding to the light-emitting color of the light-emitting elements 10, such as... Figure 1As shown, the multiple filter units 121 include a first filter unit 1211, a second filter unit 1212, and a third filter unit 1213 with different filter wavelengths. For example, they are red filter unit 1211, green filter unit 1212, and blue filter unit 1213 in sequence. Since the transmittance of the filter unit material itself to different wavelengths is different, along the Z direction in the figure, the thickness h1 of the red filter unit is usually greater than the thickness h2 of the green filter unit, and the thickness h2 of the green filter unit is greater than the thickness h3 of the blue filter unit. This results in a discontinuity on the surface of different filter units, which can easily cause process risks in the film layer preparation of the display panel. When multiple refractive structures 13 are further prepared on the surface of the filter structure 12, When the refractive unit 1311 is in use, the two ends M0 of the refractive unit 1311 distributed along the X direction in the figure respectively have bottom angles α1 and α2 on the surface of the red filter unit 1211 and the surface of the green filter unit 1212 respectively. The two ends M1 of the refractive unit 1312 distributed along the X direction in the figure respectively have bottom angles α2 and α3 on the surface of the green filter unit 1212 and the surface of the blue filter unit 1213 respectively. Since h1 > h2 > h3, it is easy to cause α1 < α2 < α3, which affects the light extraction efficiency of the display panel. Specifically, along the Z direction in the diagram, the large-viewing-angle display light S1 emitted by the light-emitting elements 10 of different colors is reflected by the two ends M0 of the refractive unit 1311 and the two ends M1 of the refractive unit 1312 and then deflected towards the positive viewing angle. However, due to the large differences in the bottom angles α1, α2 and α3 of the ends of the refractive units covering different filter units, the viewing angle range of the light emitted by the light-emitting elements deflected by the ends of different refractive units is different. This is reflected in the different light extraction efficiency of the positive viewing angle light obtained after the light emitted by the light-emitting elements of different colors is filtered by their corresponding filter units and then deflected by the refractive units. Although the refractive units can improve the brightness of each light-emitting element, the large difference in the brightness extraction efficiency of different light-emitting elements results in color difference after the light-emitting elements of different colors are mixed, which affects the normal display of the display panel.

[0024] In this context, the end of the refractive unit refers to the region where the inclined side of the refractive unit forms an angle α with the surface of the filter unit facing away from the light-emitting element, where 0° < α < 85°, i.e., 0° < α1 < α2 < α3 < 85°. It should be noted that, according to experimental testing, when the angle α is greater than or equal to 85°, the light extraction effect of the refractive structure on the light-emitting element is negligible. The positive viewing angle refers to the Z direction in the figure; the X direction in the figure refers to the direction from the first filter unit 1211 to the second filter unit 1212 or from the second filter unit 1212 to the third filter unit 1213.

[0025] Based on the above-mentioned technical problems, the inventors further developed the technical solutions of the embodiments of the present invention. Specifically, the embodiments of the present invention provide a display panel including multiple light-emitting elements, a filter structure located on the light-emitting side of the light-emitting elements, and a refractive structure located on the side of the filter structure away from the light-emitting elements; the filter structure includes multiple filter units, the refractive structure includes a first refractive layer, the first refractive layer includes multiple refractive units, and the refractive unit includes a first end and a second end distributed along a first direction; along a direction perpendicular to the plane of the display panel, the first end overlaps with the first filter unit, and the second end overlaps with the second filter unit, the first direction being the direction from the first filter unit to the second filter unit; the angle between the side of the first end and the first surface of the first end facing the first filter unit is θ1, and the angle between the side of the second end and the second surface of the second end facing the second filter unit is θ2, wherein |θ1-θ2| / θ1≤20%. By adopting the above technical solution, along the thickness direction of the display panel, in order to balance the light extraction efficiency of the light emitted by different light-emitting elements, while keeping the total transmittance of the original filter unit unchanged, the structure of the filter unit is adjusted. The first end of the refractive unit overlaps with the first filter unit, and the second end of the refractive unit overlaps with the second filter unit. The angle θ1 between the side of the first end and the first surface of the first end facing the first filter unit, and the angle θ2 between the side of the second end and the second surface of the second end facing the second filter unit satisfy |θ1-θ2| / θ1≤20%. This allows the wide-viewing-angle display light emitted by the light-emitting element to be deflected by the side of the end of its corresponding refractive unit and emitted towards the normal viewing angle. Moreover, the angle range of the light emitted by different colored light-emitting elements being deflected by the end of the refractive unit is approximately the same, thereby balancing the light extraction efficiency of the light emitted by the light-emitting elements. This improves the display brightness of the display panel while reducing the color difference after color mixing of the light-emitting elements, ensuring the normal display of the display panel.

[0026] The above is the core idea of ​​this invention. The technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0027] Figure 2 This is a schematic diagram of the surface of a display panel provided in an embodiment of the present invention; Figure 3 yes Figure 2 A cross-sectional schematic diagram of a display panel in the AA' direction; Figure 4 yes Figure 3 A schematic diagram of the light path emitted from the display panel in the image; Figure 5 yes Figure 2 A cross-sectional schematic diagram of another display panel in the AA' direction; Figure 6 yes Figure 2 A cross-sectional schematic diagram of another display panel in the AA' direction; Figure 7 yes Figure 2 A cross-sectional schematic diagram of another display panel in the AA' direction. (Combined with...) Figures 2-7 As shown, the display panel 200 provided in this embodiment of the invention includes a plurality of light-emitting elements 20, a filter structure 30 located on the light-emitting side of the light-emitting elements 20, and a refractive structure 40 located on the side of the filter structure 30 away from the light-emitting elements 20; the filter structure 30 includes a plurality of filter units 31, the refractive structure 40 includes a first refractive layer 41, the first refractive layer 41 includes a plurality of refractive units 410, and the refractive unit 410 includes a first end 4111 and a second end 4112 distributed along a first direction; along the thickness direction of the display panel (as shown in the Z direction in the figure), the first... One end 4111 overlaps with the first filter unit 311, and the second end 4112 overlaps with the second filter unit 312. The first direction is the direction from the first filter unit 311 to the second filter unit 312 (as shown by the X direction in the figure). The angle between the side of the first end 4111 and the first surface of the first end 4111 facing the first filter unit 311 is θ1, and the angle between the side of the second end 4112 and the second surface of the second end facing the second filter unit 312 is θ2, where |θ1-θ2| / θ1≤20%.

[0028] Specifically, the display panel 200 includes organic light-emitting diode (OLED) displays, liquid crystal displays (LCDs), etc. Figures 2-6 The present invention uses an organic light-emitting display panel as an example for illustration. The present invention does not impose specific restrictions on the type of display panel 201.

[0029] Combination Figures 2-7 As shown, along the Z direction in the figure, a filter structure 30 and a refractive structure 40 are sequentially arranged on the light-emitting side of the light-emitting element 20. The filter structure 30 includes multiple filter units 31 with different filter wavelengths, such as... Figures 2-7The diagram shows three adjacent filter units 311, 312, and 313 arranged sequentially along the X direction. The filter wavelengths of the three filter units 31 can be the same or different; no specific limitation is imposed here. One feasible arrangement is, for example, a red filter unit 311, a green filter unit 312, and a blue filter unit 313 arranged sequentially. A first refractive layer 41 of a refractive structure 40 is provided on the side of the filter unit 31 away from the light-emitting element 20. The first refractive layer 41 includes multiple refractive units 410, such as the first refractive unit 411, the second refractive unit 412, and the third refractive unit 413. Taking the first refractive unit 411 as an example, the first refractive unit 411 includes a first end 4111 and a second end 4112 distributed along the X direction in the diagram. The first end 4111 of the first refractive unit 411 refers to the region where the inclined side N1 of the first refractive unit 411 forms an angle θ1 with the first surface N2 facing the first filter unit 311, where 0° < θ1 < 85°, and the angle θ1 can also be called the bottom angle of the first end 4111; the second end 4112 of the first refractive unit 411 refers to the region where the inclined side N1' of the first refractive unit 411 distributed along the X direction in the figure forms an angle θ2 with the second surface N3 facing the second filter unit 312, where 0° < θ2 < 85°, and the angle θ2 can also be called the bottom angle of the second end 4112; wherein, the first surface N2 of the first filter unit 311 refers to the side surface of the first filter unit 311 away from the light-emitting element 21, and the second surface N3 of the second filter unit 312 refers to the side surface of the second filter unit 312 away from the light-emitting element 22.

[0030] Combination Figures 2-7 As shown, with Figure 1 In contrast, while ensuring that the total transmittance of the first filter unit 311, the second filter unit 312, and the third filter unit 313 remains unchanged, the structure of at least one of the first filter unit 311, the second filter unit 312, and the third filter unit 313 in the Z direction of the figure can be adjusted, such as the thickness of the filter unit, to reduce the discontinuity between the first surface N2 of the first filter unit 311, the second surface N3 of the second filter unit 312, and the first surface N5 of the third filter unit 313. This is beneficial to reduce the difference in the bottom corner of the end face of the refractive unit 410 and reduce the manufacturing process risk of the display panel film layer covering the refractive unit 410.

[0031] Furthermore, the base angle θ1 of the first end 4111 and the base angle θ2 of the second end 4112 of the first optical refraction unit 411 are set to satisfy |θ1-θ2| / θ1≤20%, that is, the base angle θ1 of the first end 4111 and the base angle θ2 of the second end 4112 are approximately equal; the base angle θ2 of the first end and the base angle θ3 of the second end of the second optical refraction unit 412 are set to satisfy |θ3-θ4| / θ3≤20%, that is, the base angle θ3 of the second optical refraction unit 412 and the base angle θ4 of the second end are approximately equal. Combined with... Figure 4 As shown, the wide-viewing-angle light S21 emitted from the light-emitting element 21 is filtered by the first filter unit 311 and then deflected by the inclined side N1 of the first end 4111 of the first refractive unit 411 before being emitted towards the normal viewing angle; the wide-viewing-angle display light S22 emitted from the light-emitting element 22 is filtered by the second filter unit 312 and then deflected by the inclined side N1' of the second end 4112 of the first refractive unit 411 before being emitted towards the normal viewing angle. Since the bottom angles θ1 and θ2 are approximately equal, the angle range of the light emitted from the light-emitting element 21 and the light emitted from the light-emitting element 22 being deflected by the end of the first refractive unit 411 is approximately the same, which is beneficial to balancing the light extraction efficiency of the first refractive unit 411 for the light emitted from the light-emitting element 21 and the light emitted from the light-emitting element 22.

[0032] Similarly, taking the second refractive unit 412 as an example, the first end of the second refractive unit 412 (not shown in the figure) refers to the region where the inclined side N4 of the second refractive unit 412 along the X direction in the figure forms an angle θ3 with the second surface N3 facing the second filter unit 312, where 0° < θ3 < 85°; the second end of the second refractive unit 412 (not shown in the figure) refers to the region where the inclined side N4' of the second refractive unit 412 along the X direction in the figure forms an angle θ4 with the first surface N5 facing the third filter unit 413, where 0° < θ4 < 85°. The bottom angles θ3 and θ4 of the first and second ends of the second refractive unit 412 are set to satisfy |θ3-θ4| / θ3≤20%. Since the bottom angles θ3 and θ4 of the first and second ends of the second refractive unit 412 are approximately equal, the angle range of the light emitted from the light-emitting element 22 and the light-emitting element 23 being deflected by the ends of the second refractive unit 412 is approximately the same. This is beneficial to balancing the light extraction efficiency of the second refractive unit 412 for the light emitted from the light-emitting element 22 and the light-emitting element 23.

[0033] Furthermore, considering that the second end 4112 of the first refractive unit 411 and the second end of the second refractive unit 412 are both in contact with the second surface N3 of the second filter unit 312, and the second surface N3 of the second filter unit 312 is parallel to the plane where the light-emitting element 20 is located, and the bottom angle θ2 of the second end of the first refractive unit 411 and the bottom angle θ3 of the first end of the second refractive unit 412 are approximately the same, this structural design is beneficial to balancing the light extraction efficiency of the refractive unit 41 for the light emitted from the light-emitting elements 21, 22 and 23, thereby balancing the light extraction efficiency of the entire display panel and ensuring the normal display of the display panel.

[0034] Similarly, the angle between the inclined side of the refractive element and the first end of the refractive element facing the first surface of its corresponding filter element is θ. n-1 The angle between the side of the second end and the second surface of the second end facing the corresponding second filter unit is θ. n , satisfying |θ n-1 -θ n | / θ n-1 ≤20%, n>1, where n is a positive integer. (For further reference...) Figures 3-7 As shown, taking the third refractive unit 413 as an example, the first end of the third refractive unit 413 has an angle θ5 with the first surface of the third filter unit. The second end of the third refractive unit 413 is not shown in the figure. For the bottom angles of the ends of other refractive units, please refer to the above embodiment description. It should be noted that 0° < θ n <85°, 0° <θ n-1 <85°. According to the test, when the bottom angle θ at the end of the refractive unit is greater than or equal to 85°, the light extraction effect of the refractive structure on the light-emitting element is negligible.

[0035] In summary, the display panel provided by the embodiments of the present invention reduces the discontinuity between the first surfaces of each filter unit near the end of the refractive unit by reasonably adjusting the structure of the filter unit, thereby reducing the manufacturing process risk of the film layer covering the refractive unit display panel, and setting the bottom angle θ of the first end of any refractive unit. n-1 and the base angle θ at the second end n Satisfy |θ n-1 -θ n | / θ n-1≤20%, meaning that the bottom angles of the two ends of the refractive unit along the X direction in the figure are approximately equal, can deflect the wide-view display light emitted by different light-emitting elements at the two ends of the same refractive unit and then emit it towards the normal viewing angle. Moreover, the angle range of the light emitted by the light-emitting element being deflected by the end of the same refractive unit is approximately the same. While improving the display brightness of the display panel, it is also beneficial to balance the light extraction efficiency of the light emitted by different light-emitting elements. It can avoid color difference after the light-emitting elements of different colors are mixed, and ensure the normal display of the display panel.

[0036] It should be noted that the display panel also includes other structures, such as the display panel substrate 201 and the driving circuit layer 202 located on one side of the substrate 201. Multiple structures work together to realize the image display of the display panel, which will not be listed one by one here.

[0037] One possible implementation method, optionally, continues to refer to Figures 2-7 As shown, along the thickness direction of the display panel (Z direction in the figure), the thickness of the filter unit overlapping with the first end 4111 is D1, and the thickness of the filter unit overlapping with the second end is D2, where |D1-D2| / D1≤20%.

[0038] For details, please refer to... Figures 2-7 As shown, while maintaining the total transmittance of the original filter unit, along the Z direction in the figure, the thickness of the filter unit 31 can be adjusted to make the thickness D1 of the filter unit overlapping the first end 4111 of the refractive unit and the thickness D2 of the filter unit overlapping the second end of the refractive unit approximately the same, i.e., satisfying |D1-D2| / D1≤20%, thereby reducing the surface discontinuity of the filter unit covered by the end of the refractive unit. Combined with... Figures 2-7 As shown, taking the first refractive unit 411 as an example, the thickness D1 of the first filter unit overlapping the first end 4111 of the first refractive unit 4111 and the thickness D2 of the second filter unit overlapping the second end 4112 of the first refractive unit 4111 are set to be approximately the same; simultaneously, along the Z direction in the figure, the first surface N2 of the first filter unit and the second surface N3 of the second filter unit are set to have the same height, which is beneficial to obtaining that the bottom angle θ1 of the first end 4111 and the bottom angle θ2 of the second end of the first refractive unit 4111 are approximately the same. (Refer to...) Figure 4 As shown, by setting the angle, it is beneficial to balance the light extraction efficiency of the first refractive unit 411 for the light emitted from the light-emitting elements 21 and 22; similarly, the structural settings of the second refractive unit 412 and the third refractive unit 413 will not be explained in detail here.

[0039] The following are some specific implementation methods to further explain how to adjust the structure of the filter unit.

[0040] Figure 8 yes Figure 3 A magnified view of a portion of region A in the middle; Figure 9 yes Figure 8 A schematic diagram of the light path emitted from the display panel in area A. Based on the above embodiment, combined with... Figures 2-3 , Figure 8 and Figure 9 As shown, optionally, the first filter unit 311 and the second filter unit 312 are adjacent, and the filtering wavelength of the first filter unit 311 is greater than the filtering wavelength of the second filter unit 312; the second filter unit 312 includes a second A portion 3121 and a second B portion 3122 connected to each other, and the second B portion 3122 surrounds the second A portion 3121; along the thickness direction of the display panel (as shown in the Z direction in the figure), the second end overlaps with at least a portion of the second A portion 3121, the thickness of the second A portion 3121 is d1, the thickness of the second B portion 3122 is d2, and d2≤d1.

[0041] Specifically, in combination Figures 2-3 , Figure 8 and Figure 9 As shown, taking two adjacent filter units 311 and 312 of different colors as an example, the first filter unit 311 and the second filter unit 312 can be a red filter unit and a green filter unit, or a red filter unit and a blue filter unit, or a green filter unit and a blue filter unit, respectively. The filtering wavelength of the first filter unit 311 is greater than the filtering wavelength of the second filter unit 312. In the prior art, combined with... Figure 1 As shown, the thickness of the first filter unit 311 is typically greater than the thickness of the second filter unit 312. One feasible implementation is to adjust the thickness of the smaller of the two adjacent filter units, such as by increasing the thickness D2 of the second filter unit 312 that overlaps with the second end 4112 of the first refractive unit 411, making the thickness D2 approximately the same as the thickness D1 of the first filter unit 312 overlapping with the first end 4111 of the first refractive unit 411. This structural design allows for a localized increase in the thickness of the smaller of the two adjacent filter units, the second filter unit 312. Figure 6 d1 and Figure 2 In the middle, D2 is the thickness of the same area of ​​the second filter unit 312, and d1 = D2.

[0042] Specifically, in combination Figure 1 and Figure 3 , Figure 8 and Figure 9 As shown, Figure 3 , Figure 8 and Figure 9 The structure of the first filter unit 311 in the middle is maintained and Figure 1The structure of the first filter unit 1211 in the figure is the same, that is, along the Z direction in the figure, D1 = h1; according to formula (1.1), adjust Figure 1 The structure of the second filter unit 1212 in the middle allows it to form a shape such that, while maintaining a constant total transmittance, it is similar to... Figure 3 , Figure 8 and Figure 9 The trapezoidal, stepped second filter unit 312 shown is defined by formula (1.1) as follows:

[0043]

[0044] Where h2 is Figure 1 The thickness of the second filter unit 1212 along the Z direction in the figure, L is... Figure 1 The length L of the second filter unit 1212 along the X direction in the figure is also... Figure 8 The length of the second filter unit 312, L1 is Figure 8 The length of the second portion 3121 of the second filter unit 312, L1 < L; d1 is Figure 8 The thickness d2 of the second portion 3121 of the second filter unit 312 is Figure 8 The thickness of the second portion 3122 of the second filter unit 312, and d2≤d1.

[0045] According to formula (1.1), combined with Figure 8 As shown, the trapezoidal step-shaped second filter unit 312 includes a second A portion 3121 and a second B portion 3122 connected to each other. The second B portion 3122 surrounds the second A portion 3121. Along the Z direction in the figure, by raising the thickness d1 of the second A portion 3121, the second end 4112 of the first optical refraction unit 411 overlaps with at least a portion of the second A portion 3121. This results in the first surface N2 of the first filter unit 311 and the second surface N3 of the second filter unit 312 having the same height. This helps to reduce the difference in the bottom angle of the end of the first optical refraction unit 411, reduce the risk of the fabrication process of the film covering the first optical refraction unit 411, and make the bottom angle θ1 of the first end 4111 and the bottom angle θ2 of the second end of the first optical refraction unit 411 approximately the same. Thus, the light extraction efficiency of the first optical refraction unit 411 for the light emitted from the light-emitting element 21 and the light-emitting element 22 can be balanced.

[0046] Based on the above embodiments, continue to combine Figure 8 As shown, optionally, along the first direction (shown in the X direction in the figure), the length of the second filter unit 312 is L, and the length of the second A portion 3121 is L1; 0.7L≤L1<L, d1≤2d2.

[0047] Specifically, as is generally known, the ND value of the filter unit satisfies formula (1.2-1.3):

[0048]

[0049] T=10 -kd , (1.3);

[0050] Where k is the refractive index of the filter unit, d is the unit thickness of the filter unit, T is the transmittance of the filter unit per unit thickness, and the ND value of the filter unit refers to the percentage of light absorbed and transmitted by the filter.

[0051] Furthermore, according to formula (1.4), the transmittance of a filter unit with a thickness of m*d is T. m , m>0.

[0052] 10 -k(md) =(10 -kd ) m =T m , (1.4);

[0053] In specific embodiments, preliminary tests have shown that, for example, the transmittance of the 2µm thick filter unit provided in this application is 75%. If a 4µm thick filter unit is used, its transmittance is 75% * 0.75 = 56%; if a 6µm thick filter unit is used, its transmittance is 75% * 0.75 * 0.75 = 42%; if a 1µm thick filter unit is used, its transmittance is sqrt(0.75%) = 87%, and so on, to obtain the transmittance of filter units with greater thicknesses. These will not be listed individually here.

[0054] Based on the above analysis, a specific implementation method is given below to further illustrate how to adjust the thinner structure in two adjacent filter units. Combined with... Figure 3 and Figure 8 As shown, taking an OLED display panel as an example, the display panel also includes a pixel defining layer 50, which includes a plurality of pixel openings 51, and the light-emitting element 20 is located within the pixel openings 51. Optionally, combined with Figure 3 and Figure 9 As shown, the display panel also includes a light-shielding structure 203 located between two adjacent light-emitting units. The light-shielding structure 203 is used to block a portion of the wide-viewing-angle light emitted from the two adjacent light-emitting elements 20, preventing light crosstalk. Figure 8 As shown, along the X direction in the figure, the diameter of the pixel opening 51 is typically 15um to 30um, the distance between the edge of the light-shielding structure 203 and the edge of the pixel opening is 5um to 6um, the length of the second portion 3121 of the second filter unit 312 overlapping with the second end 4112 of the first light-refractive unit 411 is greater than or equal to 2um, and the gap between the edge of the filter unit and the edge of the pixel opening is less than 1um (not shown in the figure).

[0055] Therefore, the ratio of the minimum length L1 of the second A portion 3121 of the second filter unit 312 to the maximum length L of the second filter unit 312 is (15+2+2) / (15+6+6)=19 / 27=70%, that is, L needs to satisfy 0.7L≤L1<L.

[0056] Taking the transmittance of the second portion 3122 of the second filter unit 312 as an example, when d1 = 2 * d2, according to formula (1.4), the transmittance of the second portion 3121 of the second filter unit 312 is 56%, and the total transmittance of the second filter unit 312 is 0.75 * 0.3 + 0.56 * 0.7 = 62%. When d1 = 3 * d2, according to formula (1.4), the transmittance of the second portion 3121 of the second filter unit 312 is 42%, and the total transmittance of the second filter unit 312 is 0.75 * 0.3 + 0.42 * 0.7 = 52%. It is usually required that the total transmittance of the filter unit be greater than or equal to 60%. Therefore, it is only necessary to set the thickness d1 of the second portion 3121 of the second filter unit 312 to satisfy d2 < d1 ≤ 2d2. This structural design allows for the local elevation of the second filter unit 312, which has a lower thickness among two adjacent filter units. This reduces the discontinuity between the first surface N2 of the first filter unit 311 and the second surface N3 of the second filter unit 312, thereby reducing the manufacturing process risk of the display panel film layer and decreasing the difference in the bottom angle at the end of the refractive unit 410. This makes the bottom angle θ1 of the first end 4111 and the bottom angle θ2 of the second end of the first refractive unit 411 approximately the same. As a result, the light extraction efficiency of the first refractive unit 411 for the light emitted from the light-emitting elements 21 and 22 can be balanced.

[0057] Continue to refer to Figure 3 As shown, by adopting the same structural design, the third filter unit 313 is set to the same structure as the second filter unit 312, which is beneficial to balance the light extraction efficiency of the second refractive unit 412 on the light-emitting element 23 and the light emitted by the light-emitting element 23.

[0058] It should be noted that the above embodiments only illustrate one design method of the second filter unit 312 structure. The ratio of the length L1 of the second A portion 3121 of the second filter unit 312 to the length L of the second filter unit 312, and the ratio of the thickness d1 of the second A portion 3121 to the thickness d2 of the second B portion 3122 of the second filter unit 312, may vary in other specific embodiments depending on the size of the pixel opening and the distance between the edge of the light-shielding structure and the edge of the pixel opening. All methods of setting the thickness of the filter unit by calculating the transmittance provided in the above embodiments are within the protection scope of the embodiments of the present invention, and will not be shown one by one in the embodiments of the present invention.

[0059] Figure 10 yes Figure 5 A magnified view of a portion of region B in the middle; Figure 11 yes Figure 10 A schematic diagram of the light path emitted from the display panel in area B. One possible implementation method is described below. Figure 5 , Figure 10 and Figure 11 As shown, optionally, the first filter unit 311 and the second filter unit 312 are adjacent, and the filtering wavelength of the first filter unit 311 is greater than the filtering wavelength of the second filter unit; the first filter unit 311 includes a first A portion 3111 and a first B portion 3112 connected to each other, and the first B portion 3112 surrounds the first A portion 3111; along the thickness direction of the display panel (as shown in the Z direction), the first end 4111 overlaps with at least a portion of the first A portion 3111, the thickness of the first A portion 3111 is d3, the thickness of the first B portion 3112 is d4, and d3≤d4.

[0060] Specifically, in combination Figure 5 , Figure 10 and Figure 11 As shown, taking two adjacent first filter units 311 and second filter units 312 of different colors as an example, a feasible implementation can also be achieved by adjusting the structure with the larger thickness among the two adjacent filter units. For example, reducing the thickness D1 of the first filter unit 311 overlapping with the first end 4111 of the first refractive unit 411, so that the thickness D1 is approximately the same as the thickness D2 of the second filter unit 312 overlapping with the second end 4112 of the first refractive unit 411. Through this structural design, the thickness of the first filter unit 311, which has the larger thickness among the two adjacent filter units, can be locally reduced. Figure 5 D1 and Figure 10 In the first filter unit 311, d3 is the thickness of the same region, and D1 = d3.

[0061] Specifically, in combination Figure 1 and Figure 5 and Figure 10 As shown, Figure 5 and Figure 10 The structure of the second filter unit 312 is maintained and Figure 1 The structure of the second filter unit 1212 in the figure is the same, that is, along the Z direction in the figure, D2 = h2; adjust Figure 1 The structure of the first filter unit 1211 in the middle allows it to form a filter with constant total transmittance, as shown in the figure. Figure 5 and Figure 10The first filter unit 311 is shown in a concave, stepped shape. The first filter unit 311 includes a first A portion 3111 and a first B portion 3112 that are connected to each other, with the first B portion 3112 surrounding the first A portion 3111; along the Z direction in the figure, the thickness d3 of the first A portion 3111 is less than the thickness d4 of the first B portion 3112. By reducing the thickness d3 of the first A portion 3111 and setting the first end 4111 of the first optical refraction unit 411 to overlap with at least part of the first A portion 3111, the first surface N2 of the first filter unit 311 and the second surface N3 of the second filter unit 312 are obtained to have the same height. This helps to reduce the difference in the bottom angle of the end of the first optical refraction unit 411, reduce the risk of the fabrication process of the film layer covering the first optical refraction unit 411, and obtain that the bottom angle θ1 of the first end 4111 and the bottom angle θ2 of the second end of the first optical refraction unit 411 are approximately the same. Through the above structural setting, it is beneficial to balance the light extraction efficiency of the first optical refraction unit 411 for the light emitted from the light-emitting element 21 and the light-emitting element 22.

[0062] Based on the above embodiments, continue to refer to Figure 10 As shown, optionally, along the first direction (shown in the X direction in the figure), the length of the first filter unit 311 is L2, the length of the first A portion 3111 is L3, 0.7L2<L3<L2, and d4≤5d3.

[0063] Specifically, based on the fact that the ND value of the filter unit provided in the above embodiments satisfies formulas (1.2-1.3), and based on the analysis provided in the above embodiments, a specific implementation method is listed below to further illustrate how to adjust the structure with larger thickness in two adjacent filter units. Combined with... Figure 2 , Figure 5 and Figure 10 As shown, taking an OLED display panel as an example, the display panel also includes a pixel defining layer 50, which includes multiple pixel openings 51, and the light-emitting element 20 is located within the pixel openings 51. Optionally, the display panel also includes a light-shielding structure 203 located between two adjacent light-filtering units. The light-shielding structure 203 is used to block a portion of the wide-viewing-angle light emitted from two adjacent light-emitting elements 20, avoiding light crosstalk. Figure 10 As shown, along the X direction in the figure, the diameter of the pixel opening 51 is typically between 15µm and 30µm, the distance between the edge of the light-shielding structure 203 and the edge of the pixel opening is between 5µm and 6µm, the length of the second portion 3111 of the first filter unit 311 overlapping with the first end 4111 of the first refractive unit 411 is greater than or equal to 2µm, and the gap between the edge of the filter unit and the edge of the pixel opening is less than 1µm (not shown in the figure).

[0064] Therefore, the ratio of the minimum length L3 of the first A portion 3111 of the first filter unit 311 to the maximum length L2 of the first filter unit 311 is (15+2+2) / (15+6+6)=19 / 27=70%, that is, L needs to satisfy 0.7L2≤L3<L2.

[0065] Taking the transmittance of the first A portion 3111 of the first filter unit 311 as an example, when d3 = 2 * d4, according to formula (1.4), the transmittance of the first B A portion 3112 of the first filter unit 311 is 56%, and the total transmittance of the first filter unit 311 is 0.75 * 0.3 + 0.56 * 0.7 = 62%; when d3 = 3 * d4, according to formula (1.4), the transmittance of the first B A portion 3112 of the first filter unit 311 is 42%, and the total transmittance of the first filter unit 311 is 0.75 * 0.3 + 0.56 * 0.7 = 62%. 0.3 + 0.42 * 0.7 = 52%; when d3 = 4 * d4, according to formula (1.4), the transmittance of the first AB portion 3112 of the first filter unit 311 is 32%, and the total transmittance of the first filter unit 311 is 0.75 * 0.7 + 0.32 * 0.3 = 62%; when d3 = 5 * d4, according to formula (1.4), the transmittance of the first AB portion 3112 of the first filter unit 311 is 24%, and the total transmittance of the first filter unit 311 is 0.75 * 0.7 + 0.24 * 0.3 = 59%. It is usually required that the total transmittance of the filter unit be greater than or equal to 60%. Therefore, it is only necessary to set the thickness d3 of the first AB portion 3111 of the first filter unit 311 to satisfy d4 < d3 ≤ 5d4. This structural design can locally reduce the thickness of the first filter unit 311, which is thicker than the first filter unit 311, thereby reducing the discontinuity between the first surface N2 of the first filter unit 311 and the second surface N3 of the second filter unit 312. This also reduces the difference in the bottom angles at the ends of the refractive unit 410, lowers the manufacturing process risk of the display panel film, and makes the bottom angles θ1 and θ2 of the first end 4111 of the first refractive unit 411 approximately the same. This helps to balance the light extraction efficiency of the first refractive unit 411 for the light emitted from the light-emitting elements 21 and 22.

[0066] One feasible implementation method is to continue referring to... Figure 6 As shown, for multiple filter units with different thicknesses, the concave stepped structure of the first filter unit 311 and the second filter unit 312 can be adjusted to reduce the surface discontinuity of the first filter unit 311 and the third filter unit 313, and to balance the light extraction efficiency of the refractive unit for the light emitted from each light-emitting element.

[0067] One feasible implementation method is to continue referring to... Figure 5As shown, for multiple filter units with different thicknesses, the first filter unit 311 can be adjusted to a concave step structure and the third filter unit 313 can be adjusted to a trapezoidal step structure by combining the adjustment of the structure with the smaller thickness in two adjacent filter units and the adjustment of the structure with the larger thickness in two adjacent filter units. This reduces the surface discontinuity of the first filter unit 311, the second filter unit 312, and the third filter unit 313, reduces the fabrication difficulty of the filter units, and balances the light extraction efficiency of the refractive unit for the light emitted from each light-emitting element.

[0068] It should be noted that the above embodiments only illustrate one design method of the first filter unit 311 structure. The ratio of the length L3 of the first A portion 3111 of the first filter unit 311 to the length L2 of the first filter unit 311, and the ratio of the thickness d3 of the first A portion 3111 to the thickness d4 of the first B portion 3112 of the first filter unit 311, may vary in other specific embodiments depending on the size of the pixel opening and the distance between the edge of the light-shielding structure and the edge of the pixel opening. All methods that use the transmittance calculation to determine the thickness of the filter unit provided in the above embodiments are within the protection scope of the embodiments of the present invention, and will not be shown one by one in the embodiments of the present invention.

[0069] One feasible implementation method, optionally, combined with Figure 7 As shown, the filtering wavelength of the first filter unit 311 is greater than that of the second filter unit 312; along the thickness direction of the display panel (as shown in the Z direction in the figure), the thickness of the first filter unit 311 and the thickness of the second filter unit 312 are the same, and the surface of the first filter unit 311 away from the light-emitting element 20 and the surface of the second filter unit 312 away from the light-emitting element 20 are flush.

[0070] Specifically, in combination Figure 7As shown, filter units made of materials with suitable transmittance can be selected, or light-transmitting particles can be doped into the filter units to ensure that the transmittance requirements of the display panel are met, and that the thickness of each filter unit is the same. There may be at least two filter units with different filter wavelengths, such as the first filter unit 311 having a larger filter wavelength than the second filter unit 312. The first filter unit 311 and the second filter unit 312 have the same thickness along the Z direction in the figure, D1 = D2. The surfaces of the first filter unit 311 and the second filter unit 312 that are away from the light-emitting element 20 are located in the same plane. Alternatively, the distance between the surface of the first filter unit 311 away from the light-emitting element 20 and the plane containing the light-emitting surface of the light-emitting element 20 is equal to the distance between the surface of the second filter unit 312 away from the light-emitting element 20 and the plane containing the light-emitting surface of the light-emitting element 20. Similarly, taking three filter units with successively decreasing filter wavelengths as an example, the thickness of the first filter unit 311, the second filter unit 312, and the third filter unit 313 along the Z direction in the figure is set to be the same, D1=D2=D3; at the same time, the surface of the first filter unit 311 away from the light-emitting element 20, the surface of the second filter unit 312 away from the light-emitting element 20, and the surface of the third filter unit 313 away from the light-emitting element 20 are all located in the same plane. More filter structures are not shown here. This structural setting is beneficial for further fabrication of the refractive unit 410, reducing the morphological differences of the refractive unit and the fabrication process risks of the display panel film layer.

[0071] Based on the above embodiments, optionally, in combination with Figure 3 , Figures 5-7 As shown, the refractive unit includes a third surface on the side away from the filter unit; along the thickness direction of the display panel (as shown by the Z direction in the figure), the distance between the plane where the third surface is located and the plane where the first surface is located in the first end is h1, and the distance between the plane where the third surface is located and the plane where the second surface is located in the second end is h2, wherein |h1-h2| / h1≤20%.

[0072] Specifically, in combination Figure 3 , Figures 5-7As shown, taking the first refractive unit 411 as an example, along the Z direction in the figure, by adjusting the structure of the first filter unit 311 and / or the second filter unit 312, the distance h1 between the plane containing the third surface N0 of the first refractive unit 411 and the plane containing the first surface N2 in the first end 411 and the distance h2 between the plane containing the third surface N0 of the first refractive unit 411 and the plane containing the second surface N3 in the second end 4112 are approximately the same. Taking the second refractive unit 412 as an example, along the Z direction in the figure, by adjusting the structure of the second filter unit 312 and / or the third filter unit 313, the distance h1 between the plane containing the third surface N0 of the second refractive unit 412 and the plane containing the first surface N3 in the first end and the distance h2 between the plane containing the third surface N0 of the second refractive unit 412 and the plane containing the second surface N5 in the second end are approximately the same. More examples of refractive units are not shown here. Setting |h1-h2| / h1≤20% ensures that the morphology of the refractive unit 410 is consistent along the Z direction in the figure. This reduces the difficulty of the display panel film layer fabrication process and makes it easier to control the end bottom angle θ of the refractive unit 410. n Equal or approximately equal values ​​are beneficial for balancing the light extraction efficiency of the refractive unit 410 for the light emitted from the light-emitting element 20.

[0073] Based on the above embodiments, combined with Figures 3-11 As shown, optionally, the refractive index of the filter unit 410 is less than the refractive index of the first refractive layer 410.

[0074] Specifically, in combination Figure 3 , Figures 5-7 As shown, the refractive indices of the first filter unit 311, the second filter unit 312, and the third filter unit 313 are all set to be less than the refractive index n2 of the first refractive layer 410. Figure 9 and Figure 11 Taking the light rays S21 emitted from light-emitting element 21 and S22 emitted from light-emitting element 22 as examples, according to the law of refraction, the wide-viewing-angle light ray S21 emitted from light-emitting element 21 is refracted at the interface between the first filter unit 311 and the first refractive unit 411, and the light ray S21 is deflected in the normal direction. Similarly, the wide-viewing-angle light ray S22 emitted from light-emitting element 22 is refracted at the interface between the second filter unit 312 and the first refractive unit 411, and the light ray S22 is deflected in the normal direction. This improves the positive viewing angle light emission efficiency of light-emitting elements 21 and 22. This principle is applied to multiple light-emitting elements 20, thereby comprehensively improving the positive viewing angle light emission efficiency of the display panel. The normal direction is parallel to the Y direction in the figure and is also the positive viewing angle emission direction of the display panel.

[0075] Based on the above embodiments, continue to combine Figures 3-11As shown, optionally, the refractive structure 40 further includes a second refractive layer 42, which covers the first refractive layer 41 and the filter unit 31, and the refractive index n3 of the second refractive layer 42 is greater than the refractive index n2 of the first refractive layer 41.

[0076] For details, please refer to [link / reference]. Figure 9 and Figure 11 As shown, the wide-viewing-angle light S21 emitted from the light-emitting element 21 is refracted at the interface between the first filter unit 311 and the first refractive unit 411, and then continues to be emitted and refracted at the interface between the first refractive unit 411 and the second refractive layer 42; the wide-viewing-angle light S22 emitted from the light-emitting element 22 is refracted at the interface between the second filter unit 312 and the first refractive unit 411, and then continues to be emitted and refracted at the interface between the first refractive unit 411 and the second refractive layer 42. The refractive index n3 of the second refractive layer 42 is set to be greater than the refractive index n2 of the first refractive layer 41, which can further deflect the light rays S21 and S22 towards the normal direction, thereby further improving the light emission efficiency of the display panel at the positive viewing angle and improving the display effect of the display panel.

[0077] Based on the above embodiments, optionally, in combination with Figure 2 , Figure 3 , Figures 5-7 As shown, the bottom angle of the pixel limiting layer 50 adjacent to the light-emitting element 20 is β, 0° < β < < θ1, 0° < β < θ2.

[0078] Specifically, taking OLED display panels as an example, combined with Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, light-emitting elements 21, 22, and 23 are located within the pixel opening 51 of the pixel limiting layer 50. The bottom angle of the pixel limiting layer 50 adjacent to light-emitting elements 21, 22, and 23 is set to β. Setting 0° < β < θ1 and 0° < β < θ2 can increase the viewing angle range of the emitted light from the light-emitting elements, so that more emitted light is deflected to the positive viewing angle by the refractive unit 410, thereby improving the overall display brightness of the display panel.

[0079] Based on the same inventive concept, embodiments of the present invention also provide a display device. Figure 12 This is a schematic diagram of the structure of the display device provided in an embodiment of the present invention, such as... Figure 12 As shown, the display device includes any of the display panels provided in the above embodiments. For example, such as... Figure 12 As shown, the display device 300 includes a display panel 200. Therefore, this display device also has the beneficial effects of the display panel in the above embodiments. The similarities can be understood with reference to the explanation of the display panel above, and will not be repeated below.

[0080] The display device 300 provided in this embodiment of the invention can be Figure 12 The mobile phone shown can also be any electronic product with display function, including but not limited to the following categories: television, laptop, desktop monitor, tablet computer, digital camera, smart bracelet, smart glasses, in-vehicle display, industrial control equipment, medical display screen, touch interactive terminal, etc. The embodiments of the present invention do not make any special limitations on this.

[0081] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that, It includes multiple light-emitting elements, a filter structure located on the light-emitting side of the light-emitting elements, and a refractive structure located on the side of the filter structure away from the light-emitting elements; The filtering structure includes multiple filtering units, and the refractive structure includes a first refractive layer, which in turn includes multiple refractive units. The refractive unit includes a first end and a second end distributed along a first direction; along the thickness direction of the display panel, the first end overlaps with a first filter unit, and the second end overlaps with a second filter unit, wherein the first direction is the direction from the first filter unit to the second filter unit; The first filter unit includes a first A portion and a first B portion connected to each other, the first B portion surrounding the first A portion; along the first direction, the length of the first filter unit is L2, and the length of the first A portion is L3; 0.7L2≤L3<L2, d4≤5d3; and / or, the second filter unit includes a second A portion and a second B portion connected to each other, the second B portion surrounding the second A portion; along the first direction, the length of the second filter unit is L, and the length of the second A portion is L1; 0.7L≤L1<L, d1≤2d2; The angle between the side of the first end and the first surface of the first end facing the first filter unit is θ1, and the angle between the side of the second end and the second surface of the second end facing the second filter unit is θ2, wherein |θ1-θ2| / θ1≤20%.

2. The display panel according to claim 1, characterized in that, Along the thickness direction of the display panel, the thickness of the filter unit overlapping with the first end is D1, and the thickness of the filter unit overlapping with the second end is D2, wherein |D1-D2| / D1≤20%.

3. The display panel according to claim 2, characterized in that, The first filter unit and the second filter unit are adjacent to each other, and the filter wavelength of the first filter unit is greater than the filter wavelength of the second filter unit; Along the thickness direction of the display panel, the second end overlaps with at least a portion of the second A portion, the thickness of the second A portion is d1, the thickness of the second B portion is d2, and d2≤d1.

4. The display panel according to claim 2, characterized in that, The first filter unit and the second filter unit are adjacent to each other, and the filter wavelength of the first filter unit is greater than the filter wavelength of the second filter unit; Along the thickness direction of the display panel, the first end overlaps with at least a portion of the first A portion, the thickness of the first A portion is d3, the thickness of the first B portion is d4, and d3≤d4.

5. The display panel according to claim 2, characterized in that, The filtering wavelength of the first filtering unit is greater than the filtering wavelength of the second filtering unit; Along the thickness direction of the display panel, the thickness of the first filter unit and the thickness of the second filter unit are the same, and the surface of the first filter unit away from the light-emitting element and the surface of the second filter unit away from the light-emitting element are flush.

6. The display panel according to claim 2, characterized in that, The refractive unit includes a third surface on the side away from the filter unit; Along the thickness direction of the display panel, the distance between the plane containing the third surface and the plane containing the first surface in the first end is h1, and the distance between the plane containing the third surface and the plane containing the second surface in the second end is h2, wherein |h1-h2| / h1≤20%.

7. The display panel according to claim 1, characterized in that, The refractive index of the filter unit is less than that of the first refractive layer.

8. The display panel according to claim 7, characterized in that, The refractive structure further includes a second refractive layer, which covers the first refractive layer and the filter unit, and the refractive index of the second refractive layer is greater than the refractive index of the first refractive layer.

9. The display panel according to claim 8, characterized in that, The display panel further includes a pixel defining layer, the pixel defining layer including a plurality of pixel openings, and the light-emitting element being located within the pixel openings; The bottom corner of the pixel defining layer adjacent to the light-emitting element is , , .

10. The display panel according to claim 1, characterized in that, The display panel also includes a light-shielding structure located between two adjacent filter units.

11. A display device, characterized in that, Includes the display panel described in any one of claims 1-10.

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