Display panel and display device

Abstract

The present invention discloses a display panel and a display device. The display panel includes: a substrate; a light-emitting element located on the substrate; the light-emitting element includes a first electrode and a light-emitting layer; in a direction perpendicular to the plane of the substrate, the light-emitting layer and the first electrode do not overlap; a light-absorbing layer located on a side of the light-emitting element facing away from the substrate; the light-absorbing layer includes a plurality of opening structures and a light-absorbing portion located between the opening structures; in a direction perpendicular to the plane of the substrate, the light-absorbing portion overlaps with the first electrode, and the opening structures overlap with the light-emitting layer. Embodiments of the present invention can improve the display uniformity of the display panel and meet the high display luminescence requirements of the display panel.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] With the development of display technology, the requirements for the display functions of display devices are becoming higher and higher. Luminous panels with good luminous brightness, high luminous efficiency, wide viewing angle range, and self-luminescence have become the focus of research and application in the current optoelectronic display field.

[0003] Existing self-luminous display panels typically include multiple light-emitting elements, each of which typically includes an anode, a cathode, and a light-emitting layer. Applying electrical signals to the anode and cathode of each element provides the corresponding carriers, namely holes and electrons, to the light-emitting layer. These holes and electrons recombine in the light-emitting layer, emitting photons and causing the element to emit light.

[0004] However, when the light-emitting element emits light, the distances between different positions of the light-emitting element and its light-emitting layer are different, resulting in differences in the luminous efficiency of different areas of the same light-emitting element, thereby affecting the display uniformity of the display panel; at the same time, due to the differences in the luminous efficiency of different areas of the same light-emitting element, the light-emitting element cannot accurately present the corresponding luminous brightness, which is not conducive to further improving the contrast of the display panel. Summary of the Invention

[0005] The present invention provides a display panel and a display device to improve the display uniformity of the display panel and meet the high display luminescence requirements of the display panel.

[0006] According to one aspect of the present invention, there is provided a display panel, comprising:

[0007] substrate;

[0008] A light-emitting element is located on the substrate; the light-emitting element includes a first electrode and a light-emitting layer; the first electrode is located on a side of the light-emitting layer close to the substrate, and the light-emitting layer and the first electrode do not overlap in a direction perpendicular to the plane of the substrate;

[0009] The light absorbing layer is located on the side of the light emitting element facing away from the substrate; the light absorbing layer includes a plurality of opening structures and a light absorbing portion located between the opening structures; in a direction perpendicular to the plane of the substrate, the light absorbing portion overlaps with the first electrode, and the opening structure overlaps with the light emitting layer.

[0010] According to another aspect of the present invention, a display device is provided, including: the above-mentioned display panel.

[0011] In the technical solution of the embodiment of the present invention, an absorbent layer is provided on the side of the light-emitting element facing away from the substrate, and in the direction perpendicular to the plane of the substrate, the opening structure of the absorbent layer overlaps with the light-emitting layer of the light-emitting element, so that the light emitted from the position of the light-emitting layer of the light-emitting element can pass through the opening structure and reach the display surface of the display panel, ensuring that the display panel can display light normally; at the same time, for the case where the first electrode of the light-emitting element does not overlap with its light-emitting layer in the direction perpendicular to the plane of the substrate, the light-emitting efficiency at the position of the first electrode of the light-emitting element is much lower than that at the position of its light-emitting layer. By making the light-absorbing part of the absorbent layer overlap with the first electrode in the direction perpendicular to the plane of the substrate, at least part of the light at the position of the first electrode of the light-emitting element cannot reach the display surface, preventing the display light accuracy of the light-emitting element from being affected due to the large difference in light-emitting efficiency at different positions of the same light-emitting element, thereby improving the display uniformity of the display panel and being beneficial to improving the display effect of the display panel. In addition, the presence of the absorbent layer can absorb part of the ambient light entering the display panel from the outside, thereby preventing the ambient light from the outside from affecting the emission color and brightness of the light-emitting element, and further being beneficial to improving the contrast of the display panel.

[0012] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0014] Figure 1 is a schematic diagram of the film layer structure of a display panel provided by an embodiment of the present invention;

[0015] Figure 2 is a schematic diagram of the film layer structure of another display panel provided by an embodiment of the present invention;

[0016] Figure 3 is a schematic diagram of the film layer structure of another display panel provided by an embodiment of the present invention;

[0017] Figure 4 is a schematic diagram of the film layer structure of another display panel provided by an embodiment of the present invention;

[0018] Figure 5It is a schematic diagram of the film layer structure of another display panel provided by an embodiment of the present invention;

[0019] Figure 6 It is a schematic diagram of a partial top view structure of a display panel provided by an embodiment of the present invention;

[0020] Figure 7 It is along Figure 6 A cross-sectional structure schematic diagram of the A-A section in

[0021] Figure 8 It is a schematic diagram of the film layer structure of another display panel provided by an embodiment of the present invention;

[0022] Figure 9 It is a schematic diagram of the film layer structure of another display panel provided by an embodiment of the present invention;

[0023] Figure 10 It is a schematic diagram of the film layer structure of another display panel provided by an embodiment of the present invention;

[0024] Figure 11 It is a schematic diagram of the film layer structure of another display panel provided by an embodiment of the present invention;

[0025] Figure 12 It is a schematic diagram of the film layer structure of another display panel provided by an embodiment of the present invention;

[0026] Figure 13 It is a schematic diagram of the structure of a display device provided by an embodiment of the present invention. Detailed implementation manners

[0027] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0028] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of the present invention are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0029] As described in the background art, due to the different luminous efficiencies of different regions of the same light-emitting element in the display panel, the light-emitting element cannot accurately emit light of the corresponding brightness, thereby affecting the display effect of the display panel and being disadvantageous to improving the contrast of the display panel.

[0030] To solve the above technical problems, an embodiment of the present invention provides a display panel, which includes: a substrate; a light-emitting element located on the substrate; the light-emitting element includes a first electrode and a light-emitting layer; in a direction perpendicular to the plane of the substrate, the light-emitting layer and the first electrode do not overlap each other; a light-absorbing layer located on a side of the light-emitting element facing away from the substrate; the light-absorbing layer includes a plurality of opening structures and light-absorbing portions located between the opening structures; in a direction perpendicular to the plane of the substrate, the light-absorbing portion and the first electrode overlap, and the opening structure and the light-emitting layer overlap.

[0031] With the above technical solution, by providing an absorbing layer on the side of the light-emitting element facing away from the substrate, and in the direction perpendicular to the plane of the substrate, the opening structure of the absorbing layer overlaps with the light-emitting layer of the light-emitting element, so that the light emitted from the position of the light-emitting layer of the light-emitting element can pass through the opening structure to reach the display surface of the display panel, ensuring that the display panel can display light normally; at the same time, for the case where the first electrode of the light-emitting element and its light-emitting layer do not overlap in the direction perpendicular to the plane of the substrate, the light-emitting efficiency at the position of the first electrode of the light-emitting element is much lower than that at the position of its light-emitting layer. By making the absorbing part of the absorbing layer overlap with the first electrode in the direction perpendicular to the plane of the substrate, at least part of the light at the position of the first electrode of the light-emitting element cannot reach the display surface, preventing the display light accuracy of the light-emitting element from being affected due to a large difference in the light-emitting efficiency at different positions of the same light-emitting element, thereby improving the display uniformity of the display panel and being beneficial to improving the display effect of the display panel. In addition, the presence of the absorbing layer can absorb part of the ambient light entering the display panel from the outside, thereby preventing the ambient light from the outside from affecting the emission color and brightness of the light-emitting element, and further being beneficial to improving the contrast of the display panel.

[0032] The above is the core idea of the present invention. Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0033] Figure 1 is a schematic diagram of the film layer structure of a display panel provided by an embodiment of the present invention. As Figure 1 shown, the display panel 100 includes a substrate 10 and a light-emitting element 20 located on the substrate 10. The light-emitting element 20 includes a first electrode 21 and a light-emitting layer 23, and in the direction Z perpendicular to the plane of the substrate 10, the light-emitting layer 23 and the first electrode 21 do not overlap. Among them, by applying corresponding electric energy to the first electrode 21 of the light-emitting element 20, corresponding carriers are generated. After the carriers are transmitted to the light-emitting layer 23, they will recombine with another type of carrier in the light-emitting layer 23 to excite photons, and the photons pass through each film layer of the light-emitting element 20 and are emitted from the light-emitting surface of the light-emitting element.

[0034] It is understandable that the photons emitted by the light-emitting layer of the light-emitting element will experience a certain degree of loss during the transmission process. The degree of photon loss is related to the light transmittance and optical path of the film layer through which it passes. Under the premise of a certain transmission film layer, the shorter the optical path, the lower the degree of photon loss. This makes the loss degree of photons emitted from the light-emitting surface in the area where the light-emitting layer is located the lowest, while the loss degree of photons emitted from the light-emitting surface at other positions is higher, resulting in the luminous brightness in the area where the light-emitting layer is located in the light-emitting element being greater than the luminous brightness in other areas of the light-emitting element, that is, the position where the light-emitting layer is located in the light-emitting element has a higher luminous efficiency, which is a high-efficiency light-emitting area in the light-emitting element, while the luminous efficiency at other positions is lower, which is a low-efficiency light-emitting area in the light-emitting element, and the luminous brightness contribution of different areas of the same light-emitting element is uncontrollable, which will affect the overall luminous brightness accuracy of the light-emitting element.

[0035] Continue to refer Figure 1 The display panel 100 also includes a light absorbing layer 30 located on the side of the light emitting element 20 facing away from the substrate 10; the light absorbing layer 30 includes a plurality of opening structures 32 and a light absorbing portion 31 located between the opening structures 32; in a direction Z perpendicular to the plane of the substrate, the light absorbing portion 31 overlaps with the first electrode 21, and the opening structure 32 overlaps with the light emitting layer 23. At this time, in the light-emitting element 20, the light emitted from the position where the light-emitting layer 23 overlaps with the opening structure 32 can pass through the opening structure 32 to the display surface of the display panel 100, meeting the display luminescence requirements of the display panel 100; while the light emitted from the position where the light-absorbing portion 31 overlaps with the first electrode 21 cannot smoothly reach the display surface of the display panel 100, so as to prevent the emission of light in the low-efficiency light-emitting area and ensure that the light in the high-efficiency light-emitting area is smoothly emitted, so that the luminous brightness of the high-efficiency light-emitting area can represent the overall luminous brightness of the light-emitting element 20. When the light-emitting element 20 emits light, it is only necessary to adjust the luminous brightness of the high-efficiency light-emitting area, which is beneficial to improve the accuracy of the overall luminous brightness of the light-emitting element 20; at the same time, when the light-emitting element 20 has a high luminous brightness accuracy, it is beneficial to improve the display luminous accuracy of the display panel 100, thereby improving the display uniformity of the display panel 100, and further beneficial to improving the display effect of the display panel 100.

[0036] In addition, the light-absorbing portion 31 in the light-absorbing layer 30 has a certain light absorption ability, so that the light-absorbing portion 31 can absorb part of the ambient light entering the display panel 100 from the outside, so as to prevent the external ambient light from affecting the luminous color and brightness of the light-emitting element 20, thereby further improving the display luminescence accuracy of the light-emitting element 20, and when the electrical signals received by the first electrodes 21 of different light-emitting elements 20 are different, different display luminescence brightness can be accurately generated, so that the luminescence brightness of different light-emitting elements 20 forms a sharp contrast, which is beneficial to improving the contrast of the display panel 100.

[0037] It can be understood that the light-emitting element 20 may include, but is not limited to, an organic light-emitting diode (OLED), a micro-LED, a mini-LED, etc. In an optional embodiment, the light-emitting element 20 is preferably a micro-LED with a smaller size, so that the light-emitting panel 100 has a higher resolution.

[0038] Based on the above embodiment, continue to refer to Figure 1 , the light-emitting element 20 further includes a second electrode 22; wherein, both the first electrode 21 and the second electrode 22 can be located on the side of the light-emitting layer 21 close to the substrate 10. At this time, by applying different electrical signals to the first electrode 21 and the second electrode 22, the first electrode 21 and the second electrode 22 respectively provide different types of carriers, that is, one of the electrodes of the light-emitting element 20 provides holes, and the other electrode provides electrons, so that the holes and electrons recombine in the light-emitting layer 23 to excite photons.

[0039] It should be noted that Figure 1 are only exemplary drawings of the embodiments of the present invention, Figure 1 only exemplarily shows that in the direction Z perpendicular to the plane of the substrate 10, the first electrode 21 does not overlap with the light-emitting layer 23, while the second electrode 22 overlaps with the light-emitting layer 23. In the embodiments of the present invention, the overlapping situation of the first electrode 21 and the second electrode 22 with the light-emitting layer 23 is not limited to this. Exemplarily, as Figure 2 shown, in the direction Z perpendicular to the plane of the substrate 10, both the first electrode 21 and the second electrode 22 do not overlap with the light-emitting layer 23. At this time, in the direction Z perpendicular to the plane of the substrate 10, both the first electrode 21 and the second electrode 22 can overlap with the light-absorbing portion 31 to meet the accuracy of the light-emitting brightness of the light-emitting element 20. In other optional embodiments, as Figure 3 shown, in the direction Z perpendicular to the plane of the substrate 10, both the first electrode 21 and the second electrode 22 do not overlap with the light-emitting layer 23, and the second electrode 22 may also not overlap with the light-absorbing portion 31. On the premise of improving the accuracy of the high-brightness light emission of the light-emitting element 20, the embodiments of the present invention do not specifically limit the overlapping situation of the second electrode 22 with the light-emitting layer 23 and the light-absorbing portion 31. For the convenience of description, the embodiments of the present invention are all described by taking the example that the first electrode does not overlap with the light-emitting layer and the second electrode overlaps with the light-emitting layer to exemplarily illustrate the technical solutions of the embodiments of the present invention.

[0040] In an optional embodiment, as Figure 4As shown, the light-emitting element 20 can be a micro-LED device with an inverted structure. At this time, the light-emitting element 20 can include a first-type semiconductor layer 24, a light-emitting layer 23, a second-type semiconductor layer 25, and a second electrode 22 that are stacked on the side of the first-type semiconductor layer 24 close to the substrate 10. The second electrode 22 is in contact with the second-type semiconductor layer 25, and the first electrode 21 is in contact with the first-type semiconductor layer 24. Among them, the first-type semiconductor layer 24 is one of an N-type semiconductor layer and a P-type semiconductor layer, and the second-type semiconductor layer 25 is the other of an N-type semiconductor layer and a P-type semiconductor layer. Exemplarily, the first-type semiconductor layer 24 can be an N-type semiconductor layer, and the second-type semiconductor layer 25 can be a P-type semiconductor layer. At this time, after the first electrode 22 receives an electrical signal, the first-type semiconductor layer 24 can provide electrons to the light-emitting layer 23, and after the second electrode 21 receives an electrical signal, the second-type semiconductor layer 25 can provide holes to the light-emitting layer 23, so that holes and electrons recombine in the light-emitting layer 23 to generate photons, and the light-emitting element 20 emits light.

[0041] In an alternative embodiment, the structure of the light-emitting element can also be such that the second-type semiconductor in contact with the second electrode is located on the side of the first-type semiconductor away from the light-emitting layer. On the premise of being able to achieve the core inventive point of the embodiments of the present invention, the specific structure of the light-emitting element in the embodiments of the present invention is not limited.

[0042] For the convenience of description and to simplify the structure of the drawings, without special instructions, the embodiments of the present invention Figure 1 take the structure of the light-emitting element shown in

[0043] as an example to exemplarily illustrate the technical solutions of the embodiments of the present invention. Figure 5 It should also be noted that in the embodiments of the present invention, the substrate 10 includes but is not limited to a substrate for substrate support. Exemplarily, as

[0044] in, Figure 5 The accompanying drawings are merely exemplary of the embodiments of the present invention. Figure 5 The structure of the driver circuit 121 is illustrated as a single transistor. However, in the embodiments of the present invention, the structure of the driver circuit 121 is not limited thereto. That is, the driver circuit 121 may include active and / or passive components. Active components include transistors, and passive components include capacitors, resistors, and inductors. This is not specifically limited in the embodiments of the present invention. In an alternative embodiment, the driver circuit may be a 2T1C circuit or a 7T1C circuit, which are well known to those skilled in the art.

[0045] To facilitate description and simplify the structure of the drawings, unless otherwise specified, the embodiments of the present invention use solid-line frames to represent the structure of the substrate, and exemplarily illustrate the technical solutions of the embodiments of the present invention.

[0046] Optionally, in a direction Z perpendicular to the plane of the substrate 10 , the first electrode 21 and the opening structure 32 do not overlap with each other.

[0047] For example, Figure 6 is a schematic diagram of a partial top view of a display panel provided by an embodiment of the present invention. Figure 7 It is along Figure 6 A schematic diagram of the cross-sectional structure of the AA section, combined with reference Figure 6 and Figure 7 When the first electrode 21 and the opening structure 32 do not overlap in a direction Z perpendicular to the plane of the substrate 10, in the overlapping light absorbing portion 31 and the first electrode 21, if the minimum spacing between the light absorbing portion 31 and the light emitting layer 23 of the light emitting element 20 to which the first electrode 21 belongs in the first direction X is L1, and the minimum spacing between the first electrode 21 and the light emitting layer 23 of the light emitting element 20 to which the first electrode 21 belongs in the first direction X is L4, then L4 should be greater than or equal to L1, that is, the light absorbing portion 31 can completely cover the first electrode 21, so that light emitted from the light emitting element 20 does not reach the display surface of the display panel 100 through the location of the first electrode 21, thereby reducing the amount of light emitted from the low-efficiency light emitting area of the light emitting element, further improving the accuracy of the light emitting brightness of the light emitting element, and thereby improving the display uniformity and display quality of the display panel. The first direction X is parallel to the plane of the substrate 10.

[0048] Optionally, in a direction perpendicular to the plane of the substrate 10 , the light absorbing portion 31 and the light emitting layer 23 do not overlap with each other.

[0049] For example, continue to refer to Figure 6 and Figure 7When the light absorption portion 31 and the light-emitting layer 23 do not overlap with each other in the direction Z perpendicular to the plane where the substrate 10 is located, the distances L1 and L2 in the first direction X between the edges on the two opposite sides of the light-emitting layer 23 that overlap with the opening structure 32 are both greater than or equal to 0, that is, the opening structure 32 can completely cover the light-emitting layer 23, so that the light emitted from the position of the light-emitting layer 23 of the light-emitting element 20 will not be absorbed by the light absorption portion 31, but can all reach the display surface of the display panel 100, so as to increase the light emission amount of the high-efficiency light-emitting area of the light-emitting element 20, thereby facilitating the improvement of the light utilization rate of the light-emitting element 20, and further improving the display brightness of the display panel, which is conducive to the further improvement of the contrast of the display panel. Among them, the first direction X is parallel to the plane where the substrate 10 is located.

[0050] Optionally, continue to refer to Figure 6 and Figure 7 The opening structure 32 corresponds to the light-emitting element 20 one by one; the projection of the light-emitting layer 23 on the plane perpendicular to the plane where the substrate 10 is located is the first projection; the first projection includes a first side 231 and a second side 232 that are arranged opposite to each other along the first direction X; the orthographic projection of the opening structure 32 on the plane perpendicular to the plane where the substrate 10 is located is the second projection; the second projection includes a third side 321 and a fourth side 322 that are arranged opposite to each other along the first direction X; in the corresponding light-emitting element 20 and opening structure 32, the first projection is located within the second projection, and the third side 321 is located on the side of the first side 231 away from the second side 232, and the fourth side 322 is located on the side of the second side 232 away from the first side 231. The distance between the first side 231 and the third side 321 in the first direction X is L1, and the distance between the second side 232 and the fourth side 322 in the first direction X is L2; among them, the difference between L1 and L2 is within a first preset range; the first direction X is parallel to the plane where the substrate 10 is located.

[0051] Among them, the first preset range is a relatively small numerical range. In an optional embodiment, |L1 - L2| ≤ 5 μm, so that in the direction Z perpendicular to the plane where the substrate 10 is located, the overlapping areas of the regions on the two opposite sides of the light-emitting layer 23 and the opening structure 32 can be kept consistent, thereby improving the light emission uniformity and accuracy of the light-emitting element 20.

[0052] It can be understood that when the display panel 100 includes a plurality of light-emitting elements arranged in an array, the first direction X can be the row direction of the light-emitting elements or the column direction of the light-emitting elements. The embodiments of the present invention do not make specific limitations on this.

[0053] It should be noted that in the embodiments of the present invention, the opening structures 32 correspond to the light-emitting elements 20 one by one. For example, one light-emitting element 20 corresponds to each opening structure 32. That is, in the direction Z perpendicular to the plane where the substrate 10 is located, each opening structure 32 overlaps with the light-emitting layer 23 of one light-emitting element 20, and the light-emitting layer 23 of each light-emitting element 20 overlaps with one opening structure 32.

[0054] It should also be noted that a film layer for defining the position of the light-emitting element 20 may be provided between the light-absorbing layer 30 and the substrate 10. This film layer may be, for example, a pixel defining layer. The pixel defining layer may include a plurality of hollow portions, and the light-emitting element 20 may be located within the hollow portions, that is, the pixel defining layer may surround the light-emitting element 20. In an alternative embodiment, a corresponding reflection structure 41 may be used instead of the pixel defining layer. The reflection structure 41 is at least disposed around the light-emitting element 20 to reflect the light emitted from the sidewall of the light-emitting element 20, so that this part of the light can be reused, thereby improving the utilization rate of light.

[0055] In an alternative embodiment, Figure 8 is a schematic diagram of the film layer structure of another display panel provided by the embodiments of the present invention. As Figure 8 shown, the display panel 100 further includes a reflection structure 41. The reflection structure 41 is located between the light-absorbing portion 30 and the substrate 10, and a part of the reflection structure 41 is located on the side of the light-emitting element 20 away from the substrate 10; in the direction Z perpendicular to the plane where the substrate 10 is located, the reflection structure 41 does not overlap with the light-emitting layer 23, and the reflection structure 41 overlaps with the first electrode 21. At this time, the reflection structure 41 does not block the light emitted from the high-efficiency light-emitting region where the light-emitting layer 23 is located, so that the light emitted from the high-efficiency light-emitting region where the light-emitting layer 23 is located can be transmitted to the display surface of the display panel 100. At the same time, the reflection structure 41 can reflect the light emitted from the low-efficiency light-emitting region where the first electrode 21 is located, so that this part of the light can be reused instead of being absorbed by the light-absorbing portion 31, so as to further improve the utilization rate of light, increase the luminance of the light-emitting element 20, and further increase the luminance difference between the brightest light and the darkest light emitted by the light-emitting element 20, thereby being conducive to improving the contrast of the display panel 100; and when the luminance of the light-emitting element 20 increases, it can also meet the high-luminance display and light-emitting requirements of the display panel 100, thereby further improving the display effect of the display panel 100.

[0056] In an alternative embodiment, continue to refer to Figure 8, a structure 42 with reflection ability may also be provided on the side of the light-emitting layer 23 close to the substrate 10 to reflect the light emitted towards the substrate 10, thereby further improving the utilization rate of light. Among them, the material of this part of the structure 42 may be the same as or different from the material of the reflection structure 41, and the embodiments of the present invention do not make specific limitations on this.

[0057] Optionally, continue to refer to Figure 8 , in the first cross-section, among the overlapping reflection structure 41 and the first electrode 21, the minimum distance between the reflection structure 41 and the light-emitting layer 23 of the light-emitting element 20 to which the first electrode 21 belongs in the first direction X is L3, and the minimum distance between the first electrode 21 and the light-emitting layer 23 of the light-emitting element 20 to which the first electrode 21 belongs in the first direction X is L4; where L3 < L4; the first direction X is parallel to the plane of the first cross-section and the substrate 10, and the first cross-section is perpendicular to the plane of the substrate 10.

[0058] Exemplarily, taking Figure 8 the schematic diagram of the film layer structure of the display panel shown in Figure 6 as another schematic diagram of the cross-sectional structure of the A-A cross-section in Figure 8 as an example, the cross-section of the A-A cross-section is the first cross-section. At this time, as shown in Figure 8 , taking the light-emitting element 20 and the reflection structure 41 overlapping therewith as a display unit. At this time, in the same display unit, the edge of the reflection structure 41 close to the light-emitting layer 23 is located on the side of the first electrode 21 close to the light-emitting layer 23, so that the reflection structure 41 can completely cover the first electrode 21 to fully reflect the light in the area where the first electrode 21 of the light-emitting element 20 is located, thereby further improving the utilization rate of the light emitted by the light-emitting element 20.

[0059] Optionally, Figure 9 is a schematic diagram of the film layer structure of another display panel provided by the embodiments of the present invention. As shown in Figure 9 , in the direction perpendicular to the plane of the substrate 10, the reflection structure 41 and the light absorption part 31 overlap. In the first cross-section, among the overlapping light absorption part 31 and the reflection structure 41, the minimum distance between the reflection structure 41 and the light-emitting layer 23 of the light-emitting element 20 to which the overlapping first electrode 21 belongs in the first direction X is L5, and the minimum distance between the light absorption part 31 and the same light-emitting layer 23 in the first direction X is L6; where L6 < L5; the first direction X is parallel to the plane of the first cross-section and the substrate 10, and the first cross-section is perpendicular to the plane of the substrate 10.

[0060] Exemplarily, taking Figure 9 the schematic diagram of the film layer structure of the display panel shown in Figure 6 as another schematic diagram of the cross-sectional structure of the A-A cross-section in Figure 9As shown, when L6 <L5时,在第一剖中,相交叠的吸光部31和反射结构41中,与反射结构41相比,吸光部31的边缘更靠近发光元件20的发光层23,即在垂直于基板10所在平面的方向上吸光部31完全覆盖反射结构41。如此,吸光部31能够防止外界的环境光到达反射结构41处,使得反射结构41对外界的环境光进行反射,而影响发光元件20的发光准确性;同时,吸光部31对外界环境光具有较高的吸光率,从而有利于进一步提高显示面板的对比度。

[0061] In an optional embodiment, since the partial reflective structure 41 is located on the side of the light-emitting element 20 facing away from the substrate 10, the distance between the surface of the reflective structure 41 facing away from the substrate 10 and the plane where the substrate 10 is located is greater than the distance between the surface of the light-emitting element 20 facing away from the substrate 10 and the plane where the substrate 10 is located. At this time, in the direction Z perpendicular to the plane where the substrate 10 is located, the light absorbing portion 31 can cover all surfaces of the reflective structure 41 on the side of the light-emitting element 20 facing away from the substrate 10, so as to maximize the blocking of external ambient light from reaching the reflective structure 41. In order to facilitate the formation of a film of the light absorbing portion 31 on the surface of the reflective structure 41, a sloped surface can be provided at the side wall of the reflective structure 41 on the side of the light emitting element 20 facing away from the substrate 10. The internal angle formed by the sloped surface and the surface of the reflective structure 41 on the side facing away from the substrate 10 is greater than 90°. The internal angle is the angle toward the substrate 10 in the angle formed by the sloped surface and the surface of the reflective structure 41 on the side facing away from the substrate 10. In this way, the light absorbing portion 31 can fully cover all surfaces of the reflective structure 41 located on the side of the light emitting element 20 facing away from the substrate 10.

[0062] Optional, continue to refer to Figure 9 In the same light-emitting element 20, the maximum distance between the first electrode 21 and the light-emitting layer 23 in the first direction X is d1, and the maximum distance between the second electrode 22 and the light-emitting layer 23 in the first direction is d2. In this case, d1 should be greater than d2, so that the distance between the first electrode 21 and the light-emitting layer 23 covered by the light-absorbing portion 31 and the reflective structure 41 is larger, and the location of the first electrode 21 is a low-efficiency light-emitting area of the light-emitting element 20. Accordingly, in the overlapping light-emitting element 20 and the light-absorbing portion 31, if the distance between the edge of the light-absorbing portion 31 and the edge of the light-emitting element 20 closest to the first electrode 21 in the first direction X is d3, and the distance between the edge of the light-absorbing portion 31 and the edge of the light-emitting element 20 closest to the second electrode 22 in the first direction X is d4, then d3 should be greater than d4. This ensures that the size of the first electrode 21 covered by the light-absorbing portion 31 is larger than the size of the second electrode 22 covered by it, thereby facilitating improved contrast of the display panel.

[0063] Optional,Figure 10 is a schematic diagram of a film layer structure of another display panel provided by an embodiment of the present invention. As Figure 10 shown, one surface of the reflection structure 41 facing away from the substrate 10 includes a first groove structure 401, and the first groove structure 401 does not overlap with the light-emitting element 20; the light-absorbing part 31 includes a first light-absorbing part 311 and a second light-absorbing part 312; in a direction perpendicular to the plane where the substrate 10 is located, the first light-absorbing part 311 overlaps with the first groove structure 401, and the second light-absorbing part 312 does not overlap with the first groove structure 401; wherein, in a direction perpendicular to the plane where the substrate 10 is located, the thickness of the first light-absorbing part 311 is greater than or equal to the thickness of the second light-absorbing part 312.

[0064] Specifically, by providing the first groove structure 401 at a position where the reflection structure 41 does not overlap with the light-emitting element 20, the first light-absorbing part 311 formed at the first groove structure 401 has a relatively large thickness, and because the relatively thick first light-absorbing part 311 has a relatively large light absorption rate for ambient light, the light absorption rate for ambient light can be further increased to prevent the accuracy of the light emitted by the light-emitting element 20 from being affected by ambient light, thereby further improving the contrast of the display panel; at the same time, by making the first groove structure 401 not overlap with the light-emitting element 20, it is ensured that the reflection structure 41 overlapping with the light-emitting element 20 has a sufficient thickness to have a strong reflection ability for the light emitted by the light-emitting element 20, which is beneficial to improving the light utilization rate, and further improving the contrast of the display panel while increasing the display brightness of the display panel 100.

[0065] It can be understood that Figure 10 only exemplarily shows that the cross-section of the first groove structure 401 is bow-shaped, that is, the first groove structure 401 may have an arc-shaped groove bottom. In the embodiment of the present invention, the cross-section of the first groove structure 401 may also be a regular or irregular shape such as a triangle, a trapezoid, a rectangle, etc., and the embodiment of the present invention does not make specific limitations on this. At the same time, in an optional embodiment, the shape of the perpendicular projection of the first groove structure 401 on the plane where the substrate 10 is located may be a regular or irregular shape such as a circle, a rectangle, etc., and the embodiment of the present invention also does not make specific limitations on this.

[0066] It can be understood that when the first light-absorbing portion 311 overlaps with the first groove and the thickness of the first light-absorbing portion 311 is greater than or equal to the thickness of the second light-absorbing portion 312, in a direction perpendicular to the plane of the substrate 10, if the depth of the first groove structure is greater than or equal to the thickness of the second light-absorbing portion 312, the distance between the surface of the first light-absorbing portion 311 facing away from the substrate 10 and the substrate 10 can be less than or equal to the distance between the surface of the second light-absorbing portion 312 facing away from the substrate 10 and the substrate 10, or the distance between the surface of the first light-absorbing portion 311 facing away from the substrate 10 and the substrate 10 can also be greater than the distance between the surface of the second light-absorbing portion 312 facing away from the substrate 10 and the substrate 10; and when the depth of the first groove structure is less than or equal to the thickness of the second light-absorbing portion 312, the distance between the surface of the first light-absorbing portion 311 facing away from the substrate 10 and the substrate 10 will be greater than or equal to the distance between the surface of the second light-absorbing portion 312 facing away from the substrate 10 and the substrate 10, and the embodiments of the present invention do not make specific limitations on this.

[0067] Optionally, continuing to refer to Figure 10 , the surface of the first light-absorbing portion 311 facing away from the substrate 10 is flush with the surface of the second light-absorbing portion 312 facing away from the substrate. In this way, it can be ensured that the surface of the light-absorbing portion 31 facing away from the substrate 10 is a flat surface, which is beneficial to film formation or assembly in subsequent processes, thereby facilitating the simplification of the subsequent processes of the display panel 100, reducing the manufacturing cost of the display panel 100, and improving the production efficiency and production yield of the display panel.

[0068] Optionally, Figure 11 is a schematic diagram of a film layer structure of another display panel provided by an embodiment of the present invention. As Figure 11 shown, the surface of the reflection structure 41 facing away from the substrate 10 further includes a second groove structure 402. The second groove structure 402 overlaps with the light-emitting element 20, and the projected area of the second groove structure 402 on the substrate 10 is smaller than the projected area of the first groove structure 401 on the substrate 10.

[0069] Specifically, by providing a second groove at the overlapping position of the reflection structure 41 and the light-emitting element 20, the light absorption rate of the light-absorbing portion for ambient light can be further improved, and the contrast of the display panel 100 can be improved; at the same time, by setting the projected area of the second groove structure 402 on the substrate 10 to be smaller than the projected area of the first groove structure 401 on the substrate 10, it can be ensured that the reflection structure 41 reserved at the position of the second groove 402 is sufficient to reflect the light emitted by the light-emitting element 20, ensuring a high light utilization rate, and can also prevent the presence of the second groove structure 402 from affecting the setting of the light-emitting element 20.

[0070] It should be noted that the cross-sectional shapes and / or the projected shapes on the substrate 10 of the first groove structure 401 and the second groove structure 402 may be the same or different. Taking the case where the cross-sectional shapes and the projected shapes on the substrate 10 of the first groove structure 401 and the second groove structure 402 are both the same as an example, when both the first groove structure 401 and the second groove structure 402 have an arc-shaped groove bottom, the radius of curvature of the first groove structure 401 may be greater than the radius of curvature of the second groove structure 402; or, when the first groove structure 401 and the second groove structure 402 have a flat groove bottom, both the depth and the width of the first groove structure 401 may be greater than the depth and the width of the second groove structure 402. The embodiments of the present invention do not make specific limitations thereto.

[0071] In an optional embodiment, as Figure 12 shown, the first groove structure 401 and the second groove structure 402 are continuous groove structures. At this time, the position where the second groove structure 402 is located is closer to the light-emitting layer 23 of the light-emitting element 20, and the depth of the second groove structure 402 is less than the depth of the first groove structure 401, so that the light absorption rate of the light absorption part 31 farther away from the light-emitting layer 23 of the light-emitting element 20 is higher. On the premise of ensuring that the light absorption part 31 has a sufficiently high light absorption ability for ambient light, it can also ensure that the reflection structure 41 has a sufficiently high reflection ability for the light emitted by the light-emitting element 20.

[0072] Based on the same inventive concept, the embodiments of the present invention further provide a display device. The display device includes the display panel provided by the embodiments of the present invention. Therefore, the display device provided by the embodiments of the present invention has the technical features of the display panel provided by the embodiments of the present invention and can achieve the beneficial effects of the display panel provided by the embodiments of the present invention. The same parts can refer to the description of the display panel provided by the embodiments of the present invention above and will not be repeated here.

[0073] Exemplarily, Figure 13 is a schematic structural diagram of a display device provided by the embodiments of the present invention. As Figure 13 shown, the display device 200 includes a display panel 100. The display device 200 may be a mobile phone, a tablet computer, a smart wearable device (for example, a smart watch), and other display devices known to those skilled in the art. The embodiments of the present invention do not make limitations thereto.

[0074] The above specific embodiments do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A display panel, characterized in that, Comprising: A substrate; A light-emitting element located on the substrate; the light-emitting element includes a first electrode and a light-emitting layer; the first electrode is located on a side of the light-emitting layer close to the substrate, and in a direction perpendicular to the plane of the substrate, the light-emitting layer and the first electrode do not overlap each other. An absorbing layer located on a side of the light-emitting element away from the substrate; the absorbing layer includes a plurality of opening structures and absorbing portions located between the opening structures; in a direction perpendicular to the plane of the substrate, the absorbing portion overlaps with the first electrode, the opening structure overlaps with the light-emitting layer, and the first electrode and the opening structure do not overlap each other.

2. The display panel according to claim 1, wherein The light-emitting element further includes: A second electrode located on a side of the light-emitting layer close to the substrate; The first electrode is located on a side of the light-emitting layer close to the substrate.

3. The display panel according to claim 1, wherein In a direction perpendicular to the plane of the substrate, the absorbing portion and the light-emitting layer do not overlap each other.

4. The display panel according to claim 3, wherein, The opening structure corresponds to the light-emitting element one by one; The projection of the light-emitting layer on a plane perpendicular to the plane of the substrate is a first projection; the first projection includes a first side and a second side arranged opposite to each other along a first direction; The projection of the opening structure on a plane perpendicular to the plane of the substrate is a second projection; the second projection includes a third side and a fourth side arranged opposite to each other along the first direction; In the corresponding light-emitting element and the opening structure, the first projection is located within the second projection, and the third side is located on a side of the first side away from the second side, the fourth side is located on a side of the second side away from the first side, the distance between the first side and the third side in the first direction is L1, and the distance between the second side and the fourth side in the first direction is L2; Wherein, the difference between L1 and L2 is within a first preset range; the first direction is parallel to the plane of the substrate.

5. The display panel according to claim 4, wherein |L1 - L2| ≤ 5 μm.

6. The display panel according to claim 1, characterized in that, Further comprising: A reflection structure located between the absorbing portion and the substrate, and a part of the reflection structure is located on a side of the light-emitting element away from the substrate; In a direction perpendicular to the plane of the substrate, the reflection structure and the light-emitting layer do not overlap each other, and the reflection structure and the first electrode overlap each other.

7. The display panel according to claim 6, wherein, In a first cross-section, in the overlapping reflection structure and the first electrode, the minimum distance between the reflection structure and the light-emitting layer of the light-emitting element to which the first electrode belongs in the first direction is L3, and the minimum distance between the first electrode and the light-emitting layer of the light-emitting element to which the first electrode belongs in the first direction is L4; Wherein, L3 < L4; the first direction is parallel to the first cross-section and the plane of the substrate, and the first cross-section is perpendicular to the plane of the substrate.

8. The display panel according to claim 6, wherein In a direction perpendicular to the plane of the substrate, the reflection structure and the absorbing portion overlap each other. In the first cross-section, among the overlapping light-absorbing portion and the reflective structure, the minimum distance between the reflective structure and the light-emitting layer of the light-emitting element to which the overlapping first electrode belongs in the first direction is L5, and the minimum distance between the light-absorbing portion and the light-emitting layer in the first direction is L6; wherein, L6 < L5; the first direction is parallel to the plane of the first cross-section and the substrate, and the first cross-section is perpendicular to the plane of the substrate.

9. The display panel according to claim 6, wherein One side surface of the reflective structure facing away from the substrate includes a first groove structure, and the first groove structure does not overlap with the light-emitting element; The light-absorbing portion includes a first light-absorbing portion and a second light-absorbing portion; in the direction perpendicular to the plane of the substrate, the first light-absorbing portion overlaps with the first groove structure, and the second light-absorbing portion does not overlap with the first groove structure; wherein, in the direction perpendicular to the plane of the substrate, the thickness of the first light-absorbing portion is greater than or equal to the thickness of the second light-absorbing portion.

10. The display panel according to claim 9, wherein The surface of the first light-absorbing portion facing away from the substrate is flush with the surface of the second light-absorbing portion facing away from the substrate.

11. The display panel according to claim 9, characterized in that, One side surface of the reflective structure facing away from the substrate further includes a second groove structure, the second groove structure overlaps with the light-emitting element, and the projected area of the second groove structure on the substrate is smaller than the projected area of the first groove structure on the substrate.

12. A display device, characterized in that, Comprising: The display panel according to any one of claims 1-11.

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