Display panel and display device

Abstract

The application discloses a display panel and a display device. The display panel comprises a light emitting element layer and a color filter layer located on the light emitting side of the light emitting element layer. The light emitting element layer comprises a first light emitting element for emitting blue light or green light. The color filter layer comprises a first filter unit arranged correspondingly to the first light emitting element. A first light conversion unit is arranged on the side of the color filter layer away from the light emitting element layer and at least on the part of the periphery corresponding to the first filter unit. The first light conversion unit can emit yellow light under the excitation of blue light or green light. Part of the blue light or green light emitted by the first light emitting element under a large viewing angle is converted into yellow light, so as to improve the color deviation phenomenon of the display panel under a large viewing angle. Meanwhile, the blue light or green light emitted by the first light emitting element under a large viewing angle is superimposed with the yellow light converted by the first light conversion unit, so that the display brightness of the display panel under a large viewing angle can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel and a display device. BACKGROUND

[0002] Organic Light Emitting Diode (OLED) display panel is widely used in the display field due to its self-luminous, low power consumption, fast response, wide viewing angle and other advantages. However, the existing OLED display panel is prone to blue or cyan color shift phenomenon under large viewing angle, which seriously affects the display effect of the OLED display panel under large viewing angle. SUMMARY

[0003] To solve the above technical problems, the embodiments of the present application provide a display panel and a display device to improve the blue or cyan color shift phenomenon of the display panel under large viewing angle and improve the display effect of the display panel under large viewing angle.

[0004] To achieve the above purpose, the embodiments of the present application provide the following technical solutions:

[0005] A display panel comprises:

[0006] A light emitting element layer, the light emitting element layer comprises a plurality of light emitting elements, the plurality of light emitting elements comprises a first light emitting element, the first light emitting element is used for emitting blue light or green light;

[0007] A color filter layer, located on the light emitting side of the light emitting element layer, the color filter layer comprises a plurality of filter units, the plurality of filter units comprises a first filter unit, the first filter unit is arranged corresponding to the first light emitting element, and the first filter unit and the adjacent filter unit are separated by a light blocking unit;

[0008] A first light conversion unit, corresponding to at least part of the periphery of the first filter unit, and located on the side of the color filter layer away from the light emitting element layer, the orthographic projection of the first light conversion unit in the plane of the display panel is located in the orthographic projection range of the light blocking unit in the plane of the display panel, and the first light conversion unit emits yellow light under the excitation of blue light or green light.

[0009] A display device comprising the above display panel.

[0010] Compared with the prior art, the above technical solution has the following advantages:

[0011] The display panel provided by the embodiment of the present application comprises a light emitting element layer and a color filter layer located on the light emitting side of the light emitting element layer, the light emitting element layer comprises a first light emitting element for emitting blue light or green light, the color filter layer comprises a first filter unit arranged correspondingly to the first light emitting element, and a first light conversion unit is arranged on the side of the color filter layer away from the light emitting element layer and at least corresponding to the part of the periphery of the first filter unit, so that the part of the blue light or green light emitted by the first light emitting element at a large viewing angle is converted into yellow light by using the characteristic that the first light conversion unit can emit yellow light under the excitation of blue light or green light, which is equivalent to that the blue light or green light of the display panel is weakened and the yellow light is enhanced at a large viewing angle, so as to improve the color cast phenomenon of the display panel at a large viewing angle, and at the same time, the blue light or green light emitted by the first light emitting element at a large viewing angle and passing through or beyond the first light conversion unit is superimposed with the yellow light converted by the first light conversion unit, for example, the blue light emitted by the first light emitting element at a large viewing angle and passing through or beyond the first light conversion unit is combined with the yellow light converted by the first light conversion unit to form white light, so that the display brightness of the display panel at a large viewing angle can also be improved, that is, the display effect of the display panel is improved from the aspects of display color and display brightness.

[0012] In addition, in the display panel provided by the embodiment of the present application, the first filter unit and the adjacent filter unit are separated by a light blocking unit, that is, the opening of the light blocking unit on the periphery of the first filter unit is the normal viewing angle opening of the first filter unit, and by arranging the first light conversion unit in the normal projection of the display panel on the projection range of the light blocking unit in the display panel, the first light conversion unit does not affect the normal viewing angle light passing through the first filter unit, that is, the normal viewing angle display of the display panel is not affected. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0014] Figure 1 A cross-sectional structure schematic diagram of a display panel provided by the embodiment of the present application;

[0015] Figure 2 A cross-sectional structure schematic diagram of another display panel provided by the embodiment of the present application;

[0016] Figure 3 A cross-sectional structure schematic diagram of another display panel provided by the embodiment of the present application;

[0017] Figure 4 FIG. 6 is a schematic diagram of a cross-sectional structure of a display panel according to another embodiment of the present application;

[0018] Figure 5 FIG. 7 is a schematic diagram of a cross-sectional structure of a display panel according to yet another embodiment of the present application;

[0019] Figure 6 FIG. 8 is a schematic diagram of a cross-sectional structure of a display panel according to still another embodiment of the present application;

[0020] Figure 7 FIG. 9 is a schematic diagram of light transmission in a display panel according to an embodiment of the present application;

[0021] Figure 8 FIG. 10 is another schematic diagram of light transmission in a display panel according to an embodiment of the present application;

[0022] Figure 9 FIG. 11 is yet another schematic diagram of light transmission in a display panel according to an embodiment of the present application;

[0023] Figure 10 FIG. 12 is a schematic diagram of a planar structure of a display device according to an embodiment of the present application. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0025] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0026] Secondly, the present application is described in detail in combination with the schematic diagrams, and in the detailed description of the embodiments of the present application, for the convenience of description, the cross-sectional diagrams representing the device structure will be partially enlarged without the general proportion, and the schematic diagrams are only examples, which should not limit the protection scope of the present application herein. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in the actual manufacture.

[0027] For existing OLED display panels, in practical applications, functional layers such as sealing layers, touch layers, and capping layers are typically stacked on the light-emitting side of the OLED light-emitting layer. The presence of these functional layers causes the light emitted by the OLED to have different optical paths at different viewing angles. For example, if the red, green, and blue light emitted by red, green, and blue OLEDs can be combined into white light at a normal viewing angle, then because the light emitted by the OLED has different optical paths at different viewing angles, the light intensity of these three primary colors will decrease at different rates at the same viewing angle. Generally, the light intensity of red light decreases faster as the viewing angle increases, while the light intensity of green and blue light decreases slower. Ultimately, this manifests as a bluish or cyan color shift in the display panel at large viewing angles, severely affecting the display effect of the display panel at large viewing angles.

[0028] In view of this, embodiments of this application provide a display panel, Figure 1 A cross-sectional schematic diagram of a display panel provided in an embodiment of this application is shown, as follows: Figure 1 As shown, the display panel includes:

[0029] The light-emitting element layer 100 includes a plurality of light-emitting elements 10, and the plurality of light-emitting elements 10 includes a first light-emitting element 11, which is used to emit blue light or green light;

[0030] The color filter layer 200 is located on the light-emitting side of the light-emitting element layer 100. The color filter layer 200 includes a plurality of filter units 20. The plurality of filter units 20 includes a first filter unit 21. The first filter unit 21 is correspondingly disposed with the first light-emitting element 11. The first filter unit 21 and the adjacent filter units are blocked by light blocking units 30.

[0031] The first light conversion unit 40 corresponds at least to a portion of the periphery of the first light filter unit 21 and is located on the side of the color filter layer 200 away from the light-emitting element layer 100. The orthographic projection of the first light conversion unit 40 onto the plane of the display panel is within the orthographic projection range of the light blocking unit 30 onto the plane of the display panel. The first light conversion unit 40 emits yellow light when excited by blue or green light.

[0032] like Figure 1As shown, in the light-emitting element layer 100, the first light-emitting element 11 is used to emit blue light or green light, that is, the first light-emitting element 11 is a blue light-emitting element 11B for emitting blue light, or a green light-emitting element 11G for emitting green light. Optionally, the multiple light-emitting elements 10 in the light-emitting element layer 100 may also include a red light-emitting element 12 for emitting red light. That is, the multiple light-emitting elements 10 may simultaneously include a red light-emitting element 12 and a green light-emitting element 11G, or may simultaneously include a red light-emitting element 12 and a blue light-emitting element 11B, or may simultaneously include a red light-emitting element 12, a blue light-emitting element 11B, and a green light-emitting element 11G.

[0033] It should be noted that this application does not limit the arrangement of the light-emitting elements 10. For example, as Figure 1 As shown, a red light-emitting element 12, a green light-emitting element 11G, and a blue light-emitting element 11B can be used as repeating units, and multiple repeating units can be arranged in a predetermined pattern to form a light-emitting element layer 100. The repeating units can also include other combinations to give the display panel a higher resolution.

[0034] It should also be noted that in practical applications, the light-emitting element 10 includes an anode, an organic light-emitting layer and a cathode (not shown in the figure) stacked together, and emits light by the combination of holes injected by the anode and electrons injected by the cathode in the organic light-emitting layer.

[0035] like Figure 1 As shown, in the color filter layer 200, the first filter unit 21 is correspondingly arranged with the first light-emitting element 11. That is, when the first light-emitting element 11 is a blue light-emitting element 11B, the corresponding first filter unit 21 is a blue filter unit 21B; when the first light-emitting element 11 is a green light-emitting element 11G, the corresponding first filter unit 21 is a green filter unit 21G. Furthermore, as... Figure 1 As shown, in the color filter layer 200, not only is the first filter unit 21 corresponding to the first light-emitting element 11, but other filter units 20 are also corresponding to the light-emitting elements 10. For example, when multiple light-emitting elements 10 simultaneously include a red light-emitting element 12, a blue light-emitting element 11B, and a green light-emitting element 11G, the multiple filter units 20 in the color filter layer 200 may include a red filter unit 22, a blue filter unit 21B, and a green filter unit 21G. Specifically, the red filter unit 22 is corresponding to the red light-emitting element 12, the green filter unit 21G is corresponding to the green light-emitting element 11G, and the blue filter unit 21B is corresponding to the blue light-emitting element 11B.

[0036] It should be noted that each filter unit 20 in the color filter layer 200 can, on the one hand, allow the light emitted by the corresponding light-emitting element to pass through, and on the other hand, when external light enters the filter unit, it can also reduce the reflection of external light.

[0037] As previously known, green and blue light intensity decays more slowly than red light as the viewing angle increases. Therefore, the blue or green light emitted by the first light-emitting element 11 can be combined with other primary color light (such as red light) to form a preset color light at a normal viewing angle. However, at a wide viewing angle, because the intensity of blue or green light emitted by the first light-emitting element 11 decays more slowly, while the intensity of other primary color light (such as red light) decays more quickly, the display panel is prone to a bluish or cyan color shift at wide viewing angles, affecting the display effect of the display panel.

[0038] Therefore, in the display panel provided in this application embodiment, by providing a first light conversion unit 40 on the side of the color filter layer 200 away from the light-emitting element layer 100 and at least corresponding to the periphery of the first filter unit 21, the first light conversion unit 40 can emit yellow light under blue or green light excitation, thereby converting part of the blue or green light emitted by the first light-emitting element 11 at a wide viewing angle into yellow light. This is equivalent to weakening the blue or green light and strengthening the yellow light of the display panel at a wide viewing angle, so as to improve the color shift phenomenon of blue or cyan in the display panel at a wide viewing angle. At the same time, the blue or green light emitted by the first light-emitting element 11 at a wide viewing angle that passes through or passes through the first light conversion unit 40 will also be superimposed with the yellow light converted by the first light conversion unit 40. For example, the blue light emitted by the first light-emitting element 11 at a wide viewing angle that passes through the first light conversion unit 40 will be combined with the yellow light converted by the first light conversion unit 40 to form white light, thereby also improving the display brightness of the display panel at a wide viewing angle. That is, the display effect of the display panel is improved from both the display color and display brightness aspects.

[0039] In this embodiment, the first light conversion unit 40 is located on the side of the color filter layer 200 away from the light-emitting element layer 100, and is disposed at least around a portion of the first filter unit 21, so that some of the blue or green light emitted by the first light-emitting element 11 at a wide viewing angle can be incident on the first light conversion unit 40 and converted into yellow light by the first light conversion unit 40.

[0040] Specifically, taking the first light-emitting element 11 as a blue light-emitting element 11B as an example, as follows... Figure 1As shown, when the blue light emitting element 11B emits a portion of the blue light L1 at a wide viewing angle, it is incident on the first light conversion unit 40 and converted into yellow light L2 by the first light conversion unit 40. This is equivalent to the blue light of the display panel becoming weaker and the yellow light becoming stronger at a wide viewing angle, so as to improve the color shift phenomenon of the display panel turning blue or green at a wide viewing angle. At the same time, the other blue light L1 emitted by the blue light emitting element 11B at a wide viewing angle will still pass through or pass through the first light conversion unit 40. The blue light L1 emitted by the blue light emitting element 11B at a wide viewing angle that passes through or passes through the first light conversion unit 40 will combine with the yellow light L2 converted by the first light conversion unit 40 to form white light, thereby improving the display brightness of the display panel at a wide viewing angle.

[0041] Since yellow light is equivalent to a composite of red and green light, it essentially converts some of the blue light emitted by the first light-emitting element 11 at a wide viewing angle into a composite of red and green light. This improves the color shift phenomenon of the display panel appearing bluish or cyan at a wide viewing angle and increases the display brightness of the display panel at a wide viewing angle.

[0042] And, as Figure 1 As shown, in the display panel provided in this application embodiment, the first filter unit 21 is blocked from the adjacent filter unit by a light blocking unit 30. The light blocking unit 30 can be a black matrix (BM) to block and absorb light, preventing light cross-contamination between the primary color filter units. Therefore, the opening KB of the light blocking unit 30 around the first filter unit 21 is the orthogonal viewing angle opening of the first filter unit 21. By setting the orthogonal projection of the first light conversion unit 40 on the plane of the display panel to be within the orthogonal projection range of the light blocking unit 30 on the plane of the display panel, the first light conversion unit 40 will not affect the orthogonal viewing angle light passing through the first filter unit 21, that is, it will not affect the orthogonal viewing angle display of the display panel.

[0043] It should be noted that, in this application, the first light conversion unit 40 is located in a direction perpendicular to the plane of the display panel (e.g., Figure 1 The height h in the Z direction is not limited. However, it is understood that in this embodiment, the closer the first light conversion unit 40 is to the positive viewing angle opening KB of the first filter unit 21, the more the first light conversion unit 40 needs to be in a direction perpendicular to the plane of the display panel (e.g., ...) so that the blue or green light emitted by the first light-emitting element 11 at a large viewing angle can be incident on the first light conversion unit 40. Figure 1The lower the height h in the Z direction, the more the first light conversion unit 40 is away from the positive viewing angle opening KB of the first filter unit 21. Therefore, in order for the blue or green light emitted by the first light-emitting element 11 at a wide viewing angle to be incident on the first light conversion unit 40, the more the first light conversion unit 40 needs to be in a direction perpendicular to the plane of the display panel (e.g., ...). Figure 1 The higher the height h in the Z direction, the better.

[0044] It should also be noted that this application does not limit the width w of the first light conversion unit 40 along the direction parallel to the plane of the display panel, but the orthographic projection of the first light conversion unit 40 on the plane of the display panel cannot exceed the orthographic projection of the light blocking unit 30 on the plane of the display panel, so as to avoid affecting the orthographic light passing through the first light filtering unit 21.

[0045] In the embodiments of this application, such as Figure 1 As shown, the first light conversion unit 40 does not absorb the red light L3 emitted by the red light-emitting element 12, nor does it convert the red light L3 emitted by the red light-emitting element 12 into other primary colors. That is, the red light L3 emitted by the red light-emitting element 12 can pass through the first light conversion unit 40 and be emitted normally. When the first light-emitting element 11 is a blue light-emitting element 11B, the first light conversion unit 40 can also allow the green light L4 emitted by the green light-emitting element 11G to be emitted normally. Of course, the first light conversion unit 40 can also simultaneously convert some of the green light L4 emitted by the green light-emitting element 11G at a wide viewing angle into yellow light L2, depending on the situation. Similarly, when the first light-emitting element 11 is a green light-emitting element 11G, the first light conversion unit 40 can also allow the blue light L1 emitted by the blue light-emitting element 11G to be emitted normally. Of course, the first light conversion unit 40 can also simultaneously convert some of the blue light L1 emitted by the blue light-emitting element 11G at a wide viewing angle into yellow light L2, depending on the situation.

[0046] Optionally, in one embodiment of this application, such as Figure 2 As shown, the orthographic projection of the first filter unit 21 and the adjacent filter units on the plane of the display panel is adjacent to the orthographic projection of the light blocking unit 30 on the plane of the display panel. That is, the first filter unit 21 and the adjacent filter units are adjacent to the light blocking unit 30 on the same layer. At this time, since the orthographic projection of the first light conversion unit 40 on the plane of the display panel is within the orthographic projection range of the light blocking unit 30 on the plane of the display panel, the first light conversion unit 40 is located on the side of the light blocking unit 30 between the first filter unit 21 and the adjacent filter units that is away from the light-emitting element layer 100.

[0047] In this embodiment, the first filter unit 21 and its adjacent filter units are arranged in close proximity to the light-blocking unit 30 on the same layer, thereby preventing gaps between the first filter unit 21 and its adjacent filter units and the light-blocking unit 30. When gaps exist between the first filter unit 21 and its adjacent filter units and the light-blocking unit 30, different primary color lights emitted by different light-emitting elements 10 may cross-pollinate through these gaps, resulting in light leakage and affecting the display effect of the display panel. However, the close proximity of the first filter unit 21 and its adjacent filter units to the light-blocking unit 30 on the same layer requires relatively high process precision.

[0048] Optionally, in another embodiment of this application, such as Figure 1 As shown, the first filter unit 21 and the adjacent filter units cover the light blocking unit 30. At this time, even if there is a gap of a certain width between the first filter unit 21 and the adjacent filter units, the orthographic projection of the gap on the plane where the display panel is located is also within the orthographic projection range of the light blocking unit 30 on the plane where the display panel is located, thereby preventing cross-coloring of different primary color light emitted by different light-emitting elements 10 in the gap, and the gap will not leak light. In addition, the requirements for process precision are also low.

[0049] Further, optionally, in one embodiment of this application, such as Figure 1 As shown, the first filter unit 21 is disposed adjacent to the adjacent filter unit, and the first light conversion unit 40 covers the gap between the first filter unit 21 and the adjacent filter unit. That is, the first light conversion unit 40 is disposed corresponding to the outer gap of the first filter unit 21. At this time, the first light conversion unit 40 is relatively far from the frontal viewing angle opening KB of the first filter unit 21. When the first light conversion unit 40 is relatively close to the frontal viewing angle opening KB of the first filter unit 21, some light emitted by the first light-emitting element 11 that passes through the area of ​​the first filter unit 21 near the light blocking unit 30 may not be able to enter the first light conversion unit 40. Therefore, in this embodiment, the first light conversion unit is provided. The distance between the first light-emitting element 11 and the positive viewing angle opening KB of the first light-emitting unit 21 is relatively far, so that some light emitted by the first light-emitting element 11 that passes through the area of ​​the first light-emitting unit 21 near the light-blocking unit 30 can also be incident on the first light conversion unit 40. This allows the first light conversion unit 40 to receive a wider range of blue or green light that has passed through the first light-emitting unit 21 and convert it into yellow light, so as to further improve the color shift phenomenon of the display panel appearing blue or cyan at a large viewing angle and further improve the display brightness of the display panel at a large viewing angle. Alternatively, the light received by the first light conversion unit 40 can also be reflected towards the positive viewing angle opening KB of the first light-emitting unit 21 to improve the positive viewing angle brightness of the display panel.

[0050] Based on any of the above embodiments, optionally, in one embodiment of this application, at least one of the two adjacent light-emitting elements 10 is a first light-emitting element 11.

[0051] In this embodiment, optionally, among two adjacent light-emitting elements 10, the reference... Figure 1 and Figure 2 As shown in the diagram, adjacent blue light emitting element 11B and red light emitting element 22 are used to emit blue or green light. One light emitting element 10 is a first light emitting element 11, which is used to emit blue or green light. The filter unit corresponding to the first light emitting element 11 is a first filter unit 21. On the side of the first filter unit 21 away from the light emitting element layer 100, and at least part of the periphery of the first filter unit 21 is provided with a first light conversion unit 40, which is used to convert part of the blue or green light emitted by the first light emitting element 11 under a wide viewing angle into yellow light. The other light emitting element 10 can be a light emitting element used to emit other primary color light (such as red light) that is different from blue and green light. In this case, the first light conversion unit 40 provided with the first light emitting element 11 allows other primary color light (such as red light) emitted by the adjacent other light emitting element that is different from blue and green light to pass through.

[0052] Alternatively, both adjacent light-emitting elements 10 may be first light-emitting elements 11. For example, in two adjacent light-emitting elements 10, reference... Figure 1 and Figure 2 As shown in the adjacent blue light emitting element 11B and green light emitting element 11G, one light emitting element 10 is a blue light emitting element 11B and the other light emitting element 10 is a green light emitting element 11G. In this case, the first light conversion unit 40 can be provided around at least a portion of the blue filter unit 21B corresponding to the blue light emitting element 11B and around at least a portion of the green filter unit 21G corresponding to the green light emitting element 11G. Alternatively, the first light conversion unit 40 can be provided only around at least a portion of the blue filter unit 21B corresponding to the blue light emitting element 11B and around at least a portion of the green filter unit 21G corresponding to the green light emitting element 11G, depending on the specific situation.

[0053] When a first light conversion unit 40 is provided at least partially around the blue filter unit 21B corresponding to the blue light emitting element 11B and at least partially around the green filter unit 21G corresponding to the green light emitting element 11G, the first light conversion unit 40 provided around at least partially around the blue filter unit 21B corresponding to the blue light emitting element 11B is used to convert part of the blue light emitted by the blue light emitting element 11B into yellow light under a wide viewing angle, and the first light conversion unit 40 provided around at least partially around the green filter unit 21G corresponding to the green light emitting element 11G is used to convert the green light emitted by the blue filter unit 21B into yellow light. The light element 11G converts some of the green light emitted by the light element 11B into yellow light at a wide viewing angle. In the gap between the blue filter unit 21B and the green filter unit 21G, the corresponding first light conversion unit 40 can be set at the same time, or only the first light conversion unit 40 corresponding to one of the filter units can be set, or only one first light conversion unit 40 can be set. The first light conversion unit 40 can convert some of the blue light emitted by the blue light emitting element 11B and some of the green light emitted by the green light emitting element 11G at a wide viewing angle into yellow light at the same time, depending on the specific situation.

[0054] Based on any of the above embodiments, optionally, in one embodiment of this application, the first light conversion unit 40 is disposed around the first light filtering unit 21. In this case, the first light conversion unit 40 can convert the blue light or green light emitted by the first light-emitting element 11 and transmitted through the first light filtering unit 21 under different side viewing angles into yellow light, thereby improving the color shift phenomenon of the display panel under different side viewing angles. Moreover, the converted yellow light under different side viewing angles will also be superimposed with the blue light or green light transmitted or passed through the first light conversion unit 40 under the corresponding side viewing angles, thereby simultaneously improving the display brightness of the display panel under different side viewing angles, and improving the display effect of the display panel from both the aspects of display color and display brightness.

[0055] Based on any of the above embodiments, optionally, in one embodiment of this application, such as Figure 3 As shown, the display panel also includes:

[0056] The cover layer 300 is located on the side of the color filter layer 200 away from the light-emitting element layer 100, and the cover layer 300 and the first light conversion unit 40 are integrally formed.

[0057] As is known from the foregoing, a cover layer 300 is usually provided on the light-emitting side of the light-emitting element layer 100. In this embodiment, other materials can be incorporated into a portion of the cover layer 300, so that a portion of the cover layer 300 is transformed into a first light conversion unit 40.

[0058] In this embodiment, optionally, such as Figure 3 As shown, the first light conversion unit 40 is in a direction perpendicular to the plane of the display panel (e.g., Figure 3The height h in the Z-direction can be equal to the height h of the cover layer 300 in the direction perpendicular to the plane of the display panel (e.g., ...). Figure 3 The height of the first light conversion unit 40 in the Z-direction; alternatively, the height of the first light conversion unit 40 in the direction perpendicular to the plane of the display panel (e.g., in the Z-direction); Figure 3 The height h in the Z-direction can also be less than the cover layer 300 in the direction perpendicular to the plane of the display panel (e.g., Figure 3 The height in the Z direction (mid-Z) depends on the specific circumstances.

[0059] Of course, optionally, in another embodiment of this application, the first light conversion unit 40 may also be formed independently of the cover layer 300, depending on the specific circumstances.

[0060] Optionally, in one embodiment of this application, the first light conversion unit 40 includes a first transparent body and a first light conversion material distributed in the first transparent body, wherein the first light conversion material emits yellow light when excited by blue or green light.

[0061] In this embodiment, when the first light conversion unit 40 and the cover layer 300 are integrally formed, the first transparent body in the first light conversion unit 40 and the cover layer 300 are made of the same material. When the first light conversion unit 40 is independent of the cover layer 300, the first transparent body in the first light conversion unit 40 can be made of a different material from the cover layer 300.

[0062] Since some phosphorescent materials can emit longer wavelength light (such as yellow light) when excited by short wavelength light (such as blue light or green light), in this embodiment, the first light conversion material can be a phosphorescent material.

[0063] Specifically, taking the first light-emitting element 11 as a blue light-emitting element 11B as an example, the first light conversion material can be a garnet structure phosphor doped with a cerium activator, i.e. (Y 1-y M y )3(Al 1-z Ga z )5O 12 Ce (M = Gd, Lu) (abbreviated as YAG:Ce) can also be a silicate and phosphate compound, such as Sr2SiO4:Eu 2+ It could also be Me3Re2B4O 12 :Ce 3+ Phosphors based on borate groups (Me = alkaline earth elements such as Ca, Sr, and Ba; Re = rare earth elements such as Y, La, and Gd), depending on the specific circumstances.

[0064] It should be noted that the concentration of the first light conversion material doped in the first transparent body can be controlled according to the actual situation, thereby adjusting the ability of the first light conversion unit 40 to convert blue light (or green light) into yellow light, and thus adjusting the ratio of blue light (or green light) to yellow light in the display panel at a wide viewing angle.

[0065] Specifically, if the concentration of the first light conversion material doped in the first transparent body is relatively high, the first light conversion unit 40 has a relatively strong ability to convert blue light (or green light) into yellow light. That is, the first light conversion unit 40 can convert more blue light (or green light) into yellow light. In this case, the display panel has a larger proportion of yellow light and a smaller proportion of blue light (or green light) at wide viewing angles, which better improves the color shift phenomenon of the display panel appearing bluish or cyan at wide viewing angles. Conversely, if the concentration of the first light conversion material doped in the first transparent body is relatively low, the first light conversion unit 40 has a relatively weak ability to convert blue light (or green light) into yellow light. That is, the first light conversion unit 40 can convert less blue light (or green light) into yellow light. In this case, the display panel has a smaller proportion of yellow light and a larger proportion of blue light (or green light) at wide viewing angles, which is less effective in improving the color shift phenomenon of the display panel appearing bluish or cyan at wide viewing angles.

[0066] Optionally, in one embodiment of this application, such as Figure 4 As shown, the first light-emitting element 11 is used to emit blue light, that is, the first light-emitting element 11 is a blue light-emitting element 11B, and the first light conversion material emits yellow light when excited by blue light;

[0067] The plurality of light-emitting elements 10 also includes a second light-emitting element 11G, which is used to emit green light, that is, the second light-emitting element is a green light-emitting element 11G;

[0068] The plurality of filter units 20 also include a second filter unit 21G, which is disposed corresponding to the second light-emitting element 11G. The second filter unit 21G is blocked from the adjacent filter unit by a light blocking unit 30.

[0069] The display panel also includes a second light conversion unit 50, which corresponds at least to a portion of the periphery of the second filter unit 21G and is located on the side of the color filter layer 200 away from the light-emitting element layer 100. The orthographic projection of the second light conversion unit 50 onto the plane of the display panel is located within the orthographic projection range of the light blocking unit 30 onto the plane of the display panel.

[0070] The second light conversion unit 50 includes a second transparent body and a second light conversion material distributed in the second transparent body. The second light conversion material emits yellow light when excited by green light. The second light conversion material is different from the first light conversion material.

[0071] In this embodiment, the first light-emitting element 11 is a blue light-emitting element 11B, and the filter unit corresponding to the blue light-emitting element 11B is a first filter unit 21B. A first light conversion unit 40 is disposed around at least a portion of the periphery of the first filter unit 21B. The first light conversion unit 40 includes a first transparent body and a first light conversion material distributed within the first transparent body. The first light conversion material is used in the case of blue light (…). Figure 4 It emits yellow light when excited by L1. Figure 4 (L2); the second light-emitting element is a green light-emitting element 11G, and the filter unit corresponding to the green light-emitting element 11G is a second filter unit 21G. At least a portion of the periphery of the second filter unit 21G is provided with a second light conversion unit 50. The second light conversion unit 50 includes a second transparent body and a second light conversion material distributed in the second transparent body. The second light conversion material is used in green light ( Figure 4 It emits yellow light when excited by L4 (in the middle). Figure 4 (Middle L2).

[0072] In other words, in this embodiment, a first light conversion unit 40 is provided corresponding to the blue light emitting element 11B to convert part of the blue light from the blue light emitting element 11B into yellow light under a wide viewing angle. At the same time, a second light conversion unit 50 is provided corresponding to the green light emitting element 11G to convert part of the green light from the green light emitting element 11G into yellow light under a wide viewing angle.

[0073] Similar to the first light conversion unit 40, the second light conversion unit 50 also allows the red light emitted by the red light emitting element 12 to ( Figure 4 Light of primary color L3 or other primary colors different from green can pass through.

[0074] Similar to the first light conversion unit 40, the second light conversion unit 50 can also be integrally formed with the cover layer 300.

[0075] Similar to the first optical conversion unit 40, the second optical conversion unit 50 can also correspond to the surrounding arrangement of the second filter unit 21G.

[0076] Similar to the first light conversion unit 40, the second light conversion unit 50 can also cover the gap between the second filter unit 21G and the adjacent filter unit, and the second filter unit 21G and the adjacent filter unit are arranged in close proximity to each other, together covering the light blocking unit 30.

[0077] Unlike the first light conversion unit 40, the second light conversion material in the second light conversion unit 50 is different from the first light conversion material in the first light conversion unit 40. That is, the first light conversion material in the first light conversion unit 40 emits yellow light when excited by blue light, while the second light conversion material in the second light conversion unit 50 emits yellow light when excited by green light.

[0078] In this embodiment, when the blue light emitting element 11B and the green light emitting element 11G are arranged adjacent to each other, the first filter unit 21B and the second filter unit 21G are also arranged adjacent to each other, and the first filter unit 21B and the second filter unit 21G are blocked by the light blocking unit 30. In this case, optionally, the orthographic projection of the first light conversion unit 40 on the plane where the display panel is located and the orthographic projection of the second light conversion unit 50 on the plane where the display panel is located can be simultaneously located within the orthographic projection range of the light blocking unit 30 between the first filter unit 21B and the second filter unit 21G on the plane where the display panel is located. That is, the first light conversion unit 40 and the second light conversion unit 50 are simultaneously located on the side of the light blocking unit 30 between the first filter unit 21B and the second filter unit 21G that is away from the light emitting element layer 100.

[0079] Alternatively, the orthographic projection of the first light conversion unit 40 or the second light conversion unit 50 onto the plane where the display panel is located is within the orthographic projection range of the light blocking unit 30 between the first filter unit 21B and the second filter unit 21G onto the plane where the display panel is located. That is, the light blocking unit 30 between the first filter unit 21B and the second filter unit 21G is located on the side away from the light-emitting element layer 100, and only the first light conversion unit 40 or the second light conversion unit 50 is provided.

[0080] Alternatively, the first light conversion unit 40 and the second light conversion unit 50 may be the same light conversion unit. In the transparent body of the light conversion unit, the first light conversion material and the second light conversion material are distributed simultaneously, and the first light conversion material and the second light conversion material are different, depending on the specific situation.

[0081] The following explanation will continue with the example of a structure in which the cover layer 300 and the first light conversion unit 40 are integrally formed.

[0082] Optionally, in one embodiment of this application, the refractive index of the first light conversion unit 40 is less than the refractive index of the capping layer 300.

[0083] Since the main viewing angle of the display panel is still the orthographic viewing angle, in this embodiment, the refractive index of the first light conversion unit 40 is set to be less than that of the cover layer 300. At this time, the first light conversion unit 40 is an optically sparse material and the cover layer 300 is an optically dense material. Then, when the blue or green light emitted by the first light-emitting element 11 is incident on the first light conversion unit 40 with a lower refractive index through the cover layer 300 with a higher refractive index, since the light emitted by the first light-emitting element 11 that can be incident on the first light conversion unit 40 is a wide-viewing-angle light, the incident angle of these lights is large when they are incident on the first light conversion unit 40. When the incident angle is greater than the critical angle of total internal reflection, total internal reflection can occur. The reflected light will be deflected relative to the incident light towards the orthographic viewing angle opening KB of the first filter unit 21, thereby increasing the light output of the display panel at the orthographic viewing angle and improving the display brightness of the display panel at the orthographic viewing angle.

[0084] Since total internal reflection can occur when light travels from a medium with a higher refractive index to a medium with a lower refractive index, as long as the angle of incidence is greater than the critical angle for total internal reflection, further, in order to maximize the reflection of light emitted from the first light-emitting element 11 onto the first light conversion unit 40 towards the positive viewing angle opening KB of the first filter unit 21, optionally, in one embodiment of this application, such as... Figures 4-6 As shown, the clockwise angle between the side of the first light conversion unit 40 and the plane of the display panel is greater than or equal to 90°, thereby increasing the incident angle of the light emitted by the first light-emitting element 11 at a wide viewing angle that is incident on the side of the first light conversion unit 40. This allows more light emitted by the first light-emitting element 11 at a wide viewing angle that is incident on the side of the first light conversion unit 40 to undergo total internal reflection at the frontal viewing angle opening KB of the first filter unit 21, further improving the frontal viewing angle display brightness of the display panel.

[0085] It should be noted that, for the sake of clarity of the illustration, Figure 5 and Figure 6 The diagram only shows a schematic of light transmission that undergoes total internal reflection when incident on the side of the first light conversion unit 40. However, it is understandable that the light emitted by the first light-emitting element 11 at a wide viewing angle that is incident on the side of the first light conversion unit 40 may be converted into yellow light after passing through the first light conversion unit 40.

[0086] Specifically, in one embodiment of this application, such as Figure 5 As shown, the side of the first light conversion unit 40 is an oblique plane relative to the plane where the display panel is located, that is, the cross-section of the first light conversion unit 40 in the plane perpendicular to the plane where the display panel is located is a triangle or a trapezoid.

[0087] When the first light-emitting element 11 is a blue light-emitting element 11B, such as Figure 5As shown, the blue light L1 emitted by the blue light-emitting element 11B at a wide viewing angle is incident on the side of the first light conversion unit 40 through the corresponding blue filter unit 21B. Since the side of the first light conversion unit 40 is an inclined plane relative to the plane of the display panel, that is, the clockwise angle between the side of the first light conversion unit 40 and the plane of the display panel is greater than 90°, when the blue light L1 emitted by the blue light-emitting element 11B at a wide viewing angle is incident on the side of the first light conversion unit 40, part of the blue light L1 has an incident angle greater than the critical angle of total internal reflection, which satisfies the condition of total internal reflection, and is reflected towards the front viewing angle opening KB of the blue filter unit 21B, thereby improving the front viewing angle display brightness of the display panel.

[0088] Similarly, when the first light-emitting element 11 is a green light-emitting element 11G, the process continues as follows: Figure 5 As shown, the green light L4 emitted by the green light-emitting element 11G at a wide viewing angle is incident on the first light conversion unit (at this time, it is the green light-emitting element 11G) through the corresponding green filter unit 21G. Figure 5 The side of the second light conversion unit 50 is inclined relative to the plane of the display panel, that is, the clockwise angle between the side of the second light conversion unit 50 and the plane of the display panel is greater than 90°. As a result, when some of the green light L4 emitted by the green light emitting element 11G at a large viewing angle is incident on the side of the second light conversion unit 50, the incident angle of some of the green light L4 is greater than the critical angle of total internal reflection, which satisfies the condition of total internal reflection. It is reflected towards the front viewing angle opening of the green filter unit 21G, thereby improving the front viewing angle display brightness of the display panel.

[0089] Furthermore, since the first light conversion unit 40 is disposed around at least a portion of the periphery of the first filter unit 21B (or 21G), some of the light emitted by other light-emitting elements adjacent to the first light-emitting element 11 after passing through the corresponding filter unit at a wide viewing angle will also be incident on the side of the first light conversion unit 40 and undergo total internal reflection on the side of the first light conversion unit 40. Specifically, for example, Figure 5 The red light emitting element 12, which is adjacent to the blue light emitting element 11B, emits a portion of the light emitted by the red light emitting element 12 after passing through the red light filtering unit 22 at a wide viewing angle. This light is then incident on the side of the first light conversion unit 40 and undergoes total internal reflection at the side of the first light conversion unit 40. The reflected light is deflected toward the frontal viewing angle opening of the red light filtering unit 22, thereby improving the frontal viewing angle display brightness of the display panel.

[0090] Specifically, in another embodiment of this application, such as Figure 6 As shown, the side surface of the first light conversion unit 40 is concave relative to the plane where the display panel is located.

[0091] When the first light-emitting element 11 is a blue light-emitting element 11B, such as Figure 6As shown, the blue light L1 emitted by the blue light-emitting element 11B at a wide viewing angle is incident on the side of the first light conversion unit 40 through the corresponding blue filter unit 21B. Since the side of the first light conversion unit 40 is a concave surface relative to the plane of the display panel, that is, the clockwise angle between the side of the first light conversion unit 40 and the plane of the display panel is greater than 90°, when the blue light L1 emitted by the blue light-emitting element 11B at a wide viewing angle is incident on the side of the first light conversion unit 40, the incident angle of part of the blue light L1 is greater than the critical angle of total internal reflection, satisfying the condition of total internal reflection, and is reflected towards the front viewing angle opening KB of the blue filter unit 21B, thereby improving the display brightness of the display panel at the front viewing angle.

[0092] Similarly, when the first light-emitting element 11 is a green light-emitting element 11G, the process continues as follows: Figure 6 As shown, the green light L4 emitted by the green light-emitting element 11G at a wide viewing angle is incident on the first light conversion unit (at this time, it is the green light-emitting element 11G) through the corresponding green filter unit 21G. Figure 5 The side of the second light conversion unit 50 is concave relative to the plane of the display panel, meaning the clockwise angle between the side of the second light conversion unit 50 and the plane of the display panel is greater than 90°. This causes the green light L4 emitted by the green light-emitting element 11G at a wide viewing angle to be incident on the side of the second light conversion unit 50. As a result, the incident angle of some of the green light L4 is greater than the critical angle of total internal reflection, satisfying the condition of total internal reflection. It is then reflected towards the front viewing angle opening of the green filter unit 21G, thereby improving the front viewing angle display brightness of the display panel.

[0093] Furthermore, since the first light conversion unit 40 is disposed around at least a portion of the periphery of the first filter unit 21B (or 21G), some of the light emitted by other light-emitting elements adjacent to the first light-emitting element 11 after passing through the corresponding filter unit at a wide viewing angle will also be incident on the side of the first light conversion unit 40 and undergo total internal reflection on the side of the first light conversion unit 40. Specifically, for example, Figure 6 The red light emitting element 12, which is adjacent to the blue light emitting element 11B, emits a portion of the light emitted by the red light emitting element 12 after passing through the red light filtering unit 22 at a wide viewing angle. This light is then incident on the side of the first light conversion unit 40 and undergoes total internal reflection at the side of the first light conversion unit 40. The reflected light is deflected toward the frontal viewing angle opening of the red light filtering unit 22, thereby improving the frontal viewing angle display brightness of the display panel.

[0094] Furthermore, Figures 7-9Taking a blue light-emitting element 11B as an example, a schematic diagram of light transmission is shown where light emitted from the blue light-emitting element 11B at the same side angle is incident on different regions of the side of the first light conversion unit 40. The intersection of the concave side of the first light conversion unit 40 and its tangent surface is O, and total internal reflection can occur when the blue light L11 emitted by the blue light-emitting element 11B at a large angle is incident on the tangent point O.

[0095] First, such as Figure 7 As shown, when the blue light L11 emitted by the blue light-emitting element 11B at a wide viewing angle is incident on the side of the first light conversion unit 40 at the tangent O, since the refractive index of the first light conversion unit 40 is less than that of the cover layer 300, the blue light L11 can undergo total internal reflection when the incident angle is greater than the critical angle of total internal reflection. This causes the reflected light to deflect relative to the incident light towards the frontal viewing angle of the display panel, thereby increasing the brightness of the frontal viewing angle of the display panel.

[0096] Secondly, such as Figure 8 As shown, when the blue light L12 emitted by the blue light-emitting element 11B is incident on the side of the first light conversion unit 40 in the area near the blue filter unit 21B at the tangent O, since the refractive index of the first light conversion unit 40 is less than that of the cover layer 300, the blue light L12 can undergo total internal reflection when the incident angle is greater than the critical angle of total internal reflection. This causes the reflected light to be incident on the side of the first light conversion unit 40 in the area far away from the blue filter unit 21B at the tangent O, and undergo total internal reflection again. The outgoing light is also deflected relative to the incident light towards the viewing angle of the display panel, thereby increasing the brightness of the display panel at the viewing angle.

[0097] Finally, as Figure 9 As shown, when the blue light L12 emitted by the blue light-emitting element 11B is incident on the side of the first light conversion unit 40 in a region far from the blue filter unit 21B at the tangent O, total internal reflection will not occur because the incident angle is less than the critical angle for total internal reflection. Instead, it will be converted into yellow light L2 after passing through the first light conversion unit 40.

[0098] Therefore, it can be seen that the larger the clockwise angle between the side of the first light conversion unit 40 and the plane where the display panel is located, the more light emitted from the first light-emitting element 11 that is incident on the side of the first light conversion unit 40 can undergo total internal reflection, which is more conducive to improving the brightness of the display panel at the front viewing angle.

[0099] In some embodiments, such as Figures 1-6 As shown, the light-emitting element layer 100 also includes a pixel defining layer 110, which has a plurality of first openings KX, and the light-emitting element 10 is located in the first openings KX;

[0100] There is a second opening KB between two adjacent light blocking units 30. The second opening KB is set in correspondence with the first opening KX, and the orthographic projection of the second opening KB on the plane where the display panel is located is within the orthographic projection range of the first opening KX on the plane where the display panel is located.

[0101] In this embodiment, the light-emitting element 10 is located at the first opening KX of the pixel limiting layer 110. The filter unit 20 and the light-emitting element 10 are arranged in a one-to-one correspondence, and the two adjacent filter units 20 are blocked by the light blocking unit 30. Therefore, the orthographic projection of the second opening KB between the two adjacent light blocking units 30 on the plane where the display panel is located is located within the orthographic projection range of the first opening KX in the pixel limiting layer 110 on the plane where the display panel is located. This makes the orthographic projection of the pixel limiting layer 110 between the two adjacent light-emitting elements 10 on the plane where the display panel is located within the orthographic projection range of the light blocking unit 30 between the filter units 20 corresponding to the two adjacent light-emitting elements 10 on the plane where the display panel is located, thereby preventing color mixing of different primary color light emitted by the two adjacent light-emitting elements 10.

[0102] In some embodiments, such as Figures 1-6 As shown, the display panel also includes:

[0103] The encapsulation layer 400 is located between the light-emitting element layer 100 and the color filter layer 200, and is used to seal the light-emitting element layer 100.

[0104] The encapsulation layer 400 can be a thin film encapsulation layer. For example, the encapsulation layer 400 may include multiple layers of inorganic and organic layers that are stacked alternately, but this application does not limit this and it depends on the specific circumstances.

[0105] Furthermore, optionally, in some embodiments, such as Figures 1-6 As shown, the display panel also includes:

[0106] The touch layer 500 is located between the encapsulation layer 400 and the color filter layer 200. The touch layer 500 includes multiple touch traces to enable touch operation of the display panel.

[0107] In some embodiments, such as Figures 1-6 As shown, the display panel also includes:

[0108] The array substrate 600 is located on the side of the light-emitting element layer 100 away from the color filter layer 200.

[0109] The array substrate 600 includes a substrate 610 and a driving circuit layer 620 located on the substrate 610. The driving circuit layer 620 includes multiple pixel circuits for driving the corresponding light-emitting elements to emit light.

[0110] This application embodiment also provides a display device 700, Figure 10 A schematic diagram of the structure of the display device 700 provided in an embodiment of this application is shown, as follows: Figure 10 As shown, the display device 700 includes the display panel 800 provided in any of the above embodiments. Since the specific structure of the display panel 800 has been described in detail in the foregoing embodiments, it will not be repeated here. The display device 700 can be any electronic device with display functionality, such as a touch screen, mobile phone, tablet computer, laptop computer, e-reader, or television.

[0111] In summary, this application provides a display panel and a display device. The display panel includes a light-emitting element layer and a color filter layer located on the light-emitting side of the light-emitting element layer. The light-emitting element layer includes a first light-emitting element for emitting blue or green light. The color filter layer includes a first filter unit disposed corresponding to the first light-emitting element. By disposing a first light conversion unit on the side of the color filter layer away from the light-emitting element layer and at least around the periphery corresponding to the first filter unit, the characteristic that the first light conversion unit can emit yellow light under the excitation of blue or green light is utilized to convert part of the blue or green light emitted by the first light-emitting element at a wide viewing angle into yellow light, thereby improving the color shift phenomenon of blue or cyan tint of the display panel at a wide viewing angle. At the same time, the blue or green light emitted by the first light-emitting element at a wide viewing angle that passes through or passes through the first light conversion unit will also be superimposed with the yellow light converted by the first light conversion unit, thereby improving the display brightness of the display panel at a wide viewing angle. Furthermore, the first light-filtering unit is blocked from the adjacent light-blocking unit. By setting the orthographic projection of the first light-conversion unit on the plane of the display panel to be within the orthographic projection range of the light-blocking unit on the plane of the display panel, the first light-conversion unit will not affect the orthographic viewing angle light passing through the first light-filtering unit, that is, it will not affect the orthographic viewing angle display of the display panel.

[0112] The various parts of this manual are described in a combination of parallel and progressive methods. Each part focuses on the differences between the other parts, and the same or similar parts can be referred to each other.

[0113] The features described above regarding the disclosed embodiments can be substituted or combined with each other to enable those skilled in the art to implement or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that, include: A light-emitting element layer, the light-emitting element layer including a plurality of light-emitting elements, the plurality of light-emitting elements including a first light-emitting element, the first light-emitting element being used to emit blue light or green light; A color filter layer is located on the light-emitting side of the light-emitting element layer. The color filter layer includes multiple filter units, including a first filter unit. The first filter unit is disposed corresponding to the first light-emitting element. The first filter unit and the adjacent filter unit are blocked by light-blocking units. The first light conversion unit corresponds at least to a portion of the periphery of the first light filter unit and is located on the side of the color filter layer away from the light-emitting element layer. The orthographic projection of the first light conversion unit onto the plane of the display panel is within the orthographic projection range of the light blocking unit onto the plane of the display panel. The first light conversion unit emits yellow light when excited by blue or green light.

2. The display panel according to claim 1, characterized in that, The first filter unit and the adjacent filter units are positioned adjacent to the orthographic projection of the light blocking unit on the plane of the display panel.

3. The display panel according to claim 1, characterized in that, The first filter unit and the adjacent filter units cover the light blocking unit.

4. The display panel according to claim 3, characterized in that, The first filter unit is disposed adjacent to the adjacent filter unit, and the first light conversion unit covers the gap between the first filter unit and the adjacent filter unit.

5. The display panel according to claim 1, characterized in that, Of the two adjacent light-emitting elements, at least one of the light-emitting elements is the first light-emitting element.

6. The display panel according to claim 1, characterized in that, The first light conversion unit is arranged around the first light filtering unit.

7. The display panel according to claim 1, characterized in that, Also includes: A cover layer is located on the side of the color filter layer opposite to the light-emitting element layer, and the cover layer and the first light conversion unit are integrally formed.

8. The display panel according to claim 7, characterized in that, The refractive index of the first light conversion unit is less than that of the covering layer.

9. The display panel according to claim 8, characterized in that, The clockwise angle between the side of the first light conversion unit and the plane where the display panel is located is greater than or equal to 90°.

10. The display panel according to claim 9, characterized in that, The side of the first light conversion unit is an oblique plane or an oblique concave surface relative to the plane where the display panel is located.

11. The display panel according to claim 1, characterized in that, The first light conversion unit includes a first transparent body and a first light conversion material distributed in the first transparent body. The first light conversion material emits yellow light when excited by blue or green light.

12. The display panel according to claim 11, characterized in that, The first light conversion material is a phosphorescent material.

13. The display panel according to claim 11, characterized in that, The first light-emitting element is used to emit blue light, and the first light-converting material emits yellow light when excited by blue light; The plurality of light-emitting elements further includes a second light-emitting element, which is used to emit green light; The plurality of filter units further includes a second filter unit, which is disposed corresponding to the second light-emitting element, and the second filter unit is blocked from the adjacent filter unit by the light-blocking unit. The display panel further includes a second light conversion unit, which corresponds at least to a portion of the periphery of the second light filter unit and is located on the side of the color filter layer away from the light-emitting element layer. The orthographic projection of the second light conversion unit onto the plane of the display panel is within the orthographic projection range of the light blocking unit onto the plane of the display panel. The second light conversion unit includes a second transparent body and a second light conversion material distributed in the second transparent body. The second light conversion material emits yellow light when excited by green light. The second light conversion material is different from the first light conversion material.

14. The display panel according to claim 1, characterized in that, The light-emitting element layer further includes a pixel defining layer, the pixel defining layer having a plurality of first openings, and the light-emitting element being located in the first opening; A second opening is provided between two adjacent light-blocking units, the second opening is provided corresponding to the first opening, and the orthographic projection of the second opening on the plane where the display panel is located is located within the orthographic projection range of the first opening on the plane where the display panel is located.

15. The display panel according to claim 1, characterized in that, Also includes: An encapsulation layer, located between the light-emitting element layer and the color filter layer, is used to seal the light-emitting element layer; The touch layer is located between the encapsulation layer and the color filter layer.

16. The display panel according to claim 1, characterized in that, Also includes: The array substrate is located on the side of the light-emitting element layer opposite to the color filter layer.

17. A display device, characterized in that, Includes the display panel as described in any one of claims 1-16.

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