Display panel and display device

Abstract

The embodiment of the invention provides a display panel and a display device, relates to the technical field of display, and aims at solving the problem that the ink climbing phenomenon is obvious in the related technology. The display panel comprises a substrate, a flat layer, a plurality of first electrodes distributed in an array mode and a plurality of light-emitting functional layers, the flat layer is arranged on the substrate, and the flat layer comprises a flat main body part and a plurality of protruding parts located on the side, away from the substrate, of the flat main body part; each protruding part extends in the second direction, and the multiple protruding parts are arranged side by side in the first direction. The plurality of first electrodes are located on the flat main body part, in the first direction, each first electrode is located between two adjacent protruding parts, a gap is formed between the first electrode and at least one adjacent protruding part, and the light-emitting functional layer covers the first electrodes and partially fills the gaps.

Description

Technical Field

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

[0002] Organic Light-Emitting Diode (OLED) display panels have the characteristics of self-luminescence, fast response, wide viewing angle, high brightness, etc., and are therefore widely used in display devices. The OLED display panel includes an array substrate and a light-emitting device, and the light-emitting device includes a first electrode, a light-emitting functional layer, and a second electrode stacked on the array substrate.

[0003] In related technologies, such as Figure 1 As shown, during the manufacturing process of the OLED display panel 100', a pixel definition layer 12' is usually manufactured on an array substrate formed with a first electrode 11', and openings corresponding to the light-emitting devices are formed on the pixel definition layer 12'. Then, ink is sprayed into the openings using an inkjet printing process, and the ink forms a light-emitting functional layer 13' after drying. However, the ink tends to climb along the side walls around the openings during the drying process, forming a light-emitting functional layer 13' that is thick at the edges and thin in the middle. In addition, since the first electrode 11' is manufactured before the pixel definition layer 12', the pixel definition layer 12' covers the edge of the first electrode 11', which makes the ink climbing phenomenon (i.e., the phenomenon that the ink climbs along the side walls around the openings) more significant, thereby affecting the display effect of the OLED display panel. Summary of the invention

[0004] The embodiments of the present application provide a display panel and a display device to solve the problem of significant ink climbing phenomenon in the related art.

[0005] On the one hand, an embodiment of the present application provides a display panel, which includes: a substrate, a flat layer arranged on the substrate, a plurality of first electrodes distributed in an array, and a plurality of light-emitting functional layers, the flat layer including a flat main body and a plurality of raised portions located on a side of the flat main body away from the substrate and arranged along a first direction, each of the raised portions extending along a second direction and a plurality of the raised portions arranged side by side along the first direction; a plurality of first electrodes are located on the flat main body, and in the first direction, each of the first electrodes is located between two adjacent raised portions, and a gap exists between the first electrode and at least one of the raised portions adjacent thereto; the light-emitting functional layer covers the first electrodes and partially fills the gap.

[0006] In some embodiments, a dimension of the gap in the first direction is less than or equal to 1 μm.

[0007] In some embodiments, the gap is provided between the first electrode and the two protrusions adjacent thereto, and the gaps on both sides of the first electrode are equal.

[0008] In some embodiments, the light-emitting functional layer includes a hole injection layer and a light-emitting layer sequentially arranged in a direction away from the substrate, the hole injection layer covers the first electrode and partially fills the gap, and the light-emitting layer covers the hole injection layer.

[0009] In some embodiments, a hydrophobic material is disposed on a surface of the protrusion.

[0010] In some embodiments, the display panel also includes a driving circuit layer, which is arranged on the substrate, the flat layer is arranged on the driving circuit layer, and a via is provided on the flat layer. The first electrode includes a main body and a connecting portion located on one side of the main body, the main body is arranged on the flat layer, and the connecting portion is partially located in the via and electrically connected to the driving circuit layer; wherein the display panel also includes a plurality of flat portions corresponding to the plurality of first electrodes one by one, and the flat portions at least cover the corresponding connecting portions of the first electrodes.

[0011] In some embodiments, two adjacent first electrodes in the second direction are respectively a first selected electrode and a second selected electrode, and the flat portion corresponding to the first selected electrode covers a connecting portion of the first selected electrode and an edge of the second selected electrode close to the connecting portion, and the connecting portion is located on a side of the main body of the first selected electrode close to the second selected electrode.

[0012] In some embodiments, the flat layer also includes a plurality of limiting portions located on a side of the flat main portion away from the substrate and arranged in an array, two adjacent limiting portions along the second direction are connected to the two raised portions located on both sides of the limiting portions and jointly define a light-emitting device area, and the first electrode and the light-emitting functional layer are both arranged in the light-emitting device area.

[0013] In some embodiments, the flat main body portion, the limiting portion and the protruding portion are integrally formed, and hydrophobic material is provided on surfaces of the limiting portion and the protruding portion facing away from the substrate.

[0014] On the other hand, an embodiment of the present application further provides a display device, which includes the display panel as described in any of the above embodiments.

[0015] For the display panel provided in the embodiment of the present application, by setting a gap between the first electrode and at least one protrusion adjacent thereto, in the process of making the light-emitting functional layer, the ink used to form the light-emitting functional layer will fill the gap between the first electrode and the protrusion, so that part of the ink that would originally climb along the protrusion is retained in the gap between the first electrode and the protrusion, thereby effectively alleviating the phenomenon of ink climbing, thereby helping to improve the display effect of the display panel; and, since part of the ink is retained in the gap between the first electrode and the protrusion, the climbing height of the ink is reduced, so that on the one hand, it can effectively avoid the ink overflowing the pit between the two adjacent protrusions and causing color mixing to other light-emitting devices, and on the other hand, it is also conducive to making the surface of the light-emitting functional layer away from the substrate side flatter, thereby increasing the effective light-emitting area of ​​the light-emitting functional layer and improving the aperture ratio of the display panel. In addition, since part of the ink is retained in the gap between the first electrode and the protrusion, the edge of the first electrode can also be effectively covered, thereby avoiding a short circuit between the first electrode and the second electrode located on the light-emitting functional layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a cross-sectional structural diagram of an OLED display panel in the related art;

[0017] Figure 2 is a schematic diagram of the structure of a display panel provided in some embodiments of the present application;

[0018] Figure 3 yes Figure 2 A cross-sectional structural diagram of the display panel along the AA' direction after the light-emitting functional layer is provided;

[0019] Figure 4 yes Figure 2 Another cross-sectional structural diagram of the display panel along the AA' direction after the light-emitting functional layer is provided;

[0020] Figure 5 yes Figure 2 A cross-sectional structural diagram of the display panel along the BB' direction after the light-emitting functional layer is provided;

[0021] Figure 6 is a schematic structural diagram of a display panel provided in some other embodiments of the present application;

[0022] Figure 7 is a schematic structural diagram of a display panel provided by some other embodiments of the present application;

[0023] Figure 8 yes Figure 7 A cross-sectional structural diagram of the display panel along the CC' direction after the light-emitting functional layer is provided;

[0024] Fig. 9 It is a schematic diagram of the structure of a display device provided in some embodiments of the present application. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. The described technical solutions are only used to explain and illustrate the ideas of the present application and should not be regarded as limiting the scope of protection of the present application.

[0026] In the description of this application, it should be understood that the terms "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different technical features. The term "plurality" and similar words mean two or more, unless otherwise clearly defined.

[0027] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0028] The use of "suitable for" or "configured to" in this application is meant to be open and inclusive language, which does not exclude devices that are suitable for or configured to perform additional tasks or steps. In addition, the use of "based on" is meant to be open and inclusive, because the process, step, calculation or other action "based on" one or more stated conditions or values ​​can be based on additional conditions or values ​​beyond the stated values ​​in practice.

[0029] In this application, the word "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present application.

[0030] The various embodiments of the present application are similar, and features in different embodiments and / or different examples may be combined with each other.

[0031] Some embodiments of the present application provide a display panel, such as Figures 2 to 8 As shown, the display panel includes a substrate 11, a flat layer 13 located on the substrate 11, a plurality of first electrodes 21 located on the flat layer 13 and distributed in an array, and a plurality of light-emitting functional layers 23. The flat layer 13 includes a flat main body portion 131 and a plurality of protrusions 132. Each protrusion 132 extends along the second direction Y, and the plurality of protrusions 132 are arranged side by side along the first direction X, wherein the first direction X and the second direction Y intersect each other. For example, the first direction X and the second direction Y may be perpendicular to each other.

[0032] In some examples, such as Figure 5 and Figure 6As shown, the display panel further includes a driving circuit layer located between the substrate 11 and the flat layer 13, and two adjacent protrusions 132 and the flat main body 131 jointly define a pit K, and a plurality of via holes H that are spaced apart from each other and penetrate the flat main body 131 are provided in the pit K. For example, the pit K between two adjacent protrusions 132 extends along the second direction Y, and the plurality of via holes H in the pit K are spaced apart along the second direction Y. The plurality of first electrodes 21 may correspond to the plurality of via holes H one by one. In this case, the first electrode 21 is connected to the driving circuit layer through the via hole H.

[0033] For example, the flat main body 131 and the plurality of raised portions 132 may be integrally formed so that the first electrode 21 can be manufactured after the flat layer 13 is manufactured, thereby effectively preventing the raised portions 132 from covering the edge of the first electrode 21 due to being manufactured after the first electrode 21 is manufactured.

[0034] like Figures 3 to 5 As shown, in the first direction X, the width of the protrusion 132 away from the substrate 11 is smaller than the width of the protrusion 132 close to the substrate 11. In this case, the cross section of the protrusion 132 is trapezoidal. The cross section direction is parallel to the first direction X and the third direction Z, wherein the third direction Z is the thickness direction of the substrate 11, and the third direction Z is perpendicular to the first direction X and the second direction Y at the same time.

[0035] In some examples, the planar layer 13 may be fabricated by using a halftone mask, thereby forming the protrusion 132 and the via H on the planar layer 13 at the same time.

[0036] like Figures 3 to 6 As shown, the light-emitting functional layer 23 covers a corresponding first electrode 21. Each first electrode 21 and a light-emitting functional layer 23 together correspond to a light-emitting device, and the light-emitting device also includes a second electrode, and the second electrode is arranged on the side of the light-emitting functional layer 23 away from the first electrode 21. The driving circuit layer 12 can provide an anode signal for the first electrode 21, and the second electrode can receive a cathode signal. Under the joint action of the cathode signal received by the second electrode and the anode signal received by the first electrode 21, the light-emitting functional layer 23 can emit light, thereby realizing the display function of the display panel 100.

[0037] like Figures 2 to 4 As shown, in the first direction X, each first electrode 21 is located between two adjacent protrusions 132 , and a gap F is provided between the first electrode 21 and at least one adjacent protrusion 132 . The gap F is partially filled with the light emitting functional layer 23 .

[0038] In this arrangement, since there is a gap F between the first electrode 21 and at least one protrusion 132 adjacent thereto, in the process of manufacturing the light-emitting functional layer 23, the ink used to form the light-emitting functional layer 23 will fill the gap F between the first electrode 21 and the protrusion 132, so that part of the ink that would originally climb along the protrusion 132 remains in the gap F between the first electrode 21 and the protrusion 132, thereby effectively alleviating the phenomenon of ink climbing, and thus helping to improve the display effect of the display panel 100; and, since part of the ink remains in the gap F between the first electrode 21 and the protrusion 132, the climbing height of the ink is reduced, which can effectively prevent the ink from overflowing the pit K and causing color mixing to other light-emitting devices, and on the other hand, it is also beneficial to make the surface of the light-emitting functional layer 23 away from the substrate 11 side more flat, thereby increasing the effective light-emitting area of ​​the light-emitting functional layer 23, and improving the aperture ratio of the display panel 100. In addition, since part of the ink remains in the gap F between the first electrode 21 and the protrusion 132 , the edge of the first electrode 21 can be effectively covered, thereby avoiding a short circuit between the first electrode 21 and the second electrode located on the light-emitting functional layer 23 .

[0039] In some embodiments, a dimension of the gap F in the first direction X is less than or equal to 1 μm.

[0040] Since the light-emitting area of ​​the light-emitting device is related to the area of ​​the first electrode 21 and the area of ​​the flat part of the light-emitting functional layer 23. Due to the existence of the gap F, the climbing height of the ink used to form the light-emitting functional layer 23 is reduced, so that the area of ​​the flat part (except the climbing part) of the light-emitting functional layer 23 can be increased; however, the increase in the gap F will cause the area of ​​the first electrode 21 to decrease, thereby causing the light-emitting area of ​​the light-emitting device to decrease. By making the gap F greater than 0 and less than or equal to 1μm, it is possible to effectively reduce the ink climbing height while ensuring that the light-emitting device has a larger light-emitting area, thereby improving the aperture ratio of the display panel.

[0041] It is worth noting that, since the cross section of the protrusion 132 is trapezoidal, the size of the gap F in the first direction X in the present application refers to the distance between the bottom of the protrusion 132 and the bottom of the first electrode 21 in the first direction X.

[0042] In some embodiments, Figures 2 to 4 As shown, in the first direction X, the distance between two adjacent protrusions 132 is D2, the size of the first electrode 21 located between the two adjacent protrusions 132 is D1, and D2 is larger than D1, so that a gap F is provided between the first electrode 21 and at least one protrusion 132 adjacent thereto.

[0043] Since the cross section of the protrusion 132 is trapezoidal, the distance between two adjacent protrusions 132 in the first direction X may refer to the distance between the protrusions 132 on the side close to the substrate 11 (ie, the bottom of the protrusion 132 ).

[0044] In some embodiments, Figures 2 to 4 As shown, there is a gap F between the first electrode 21 and two adjacent protrusions 132 .

[0045] like Figure 3 and Figure 4 As shown, the first electrode 21 located between two adjacent protrusions 132 has a first gap F1 with one of the protrusions 132, and has a second gap F2 with the other protrusion 132. In this way, the ink used to form the light-emitting functional layer 23 can be partially filled in the first gap F1 and the second gap F2, thereby effectively alleviating the phenomenon of ink climbing, thereby helping to improve the display effect of the display panel 100; and, since part of the ink remains in the first gap F1 and the second gap F2, the height of the ink climbing can be reduced, thereby effectively preventing the ink from overflowing the pit K and causing color mixing to other light-emitting devices.

[0046] In some examples, the dimension D3 of the first gap F1 in the first direction X is equal to the dimension D4 of the second gap F2 in the first direction X. In this case, the first electrode 21 is located between the two adjacent protrusions 132. After the light-emitting functional layer 23 is formed, the thickness of the light-emitting functional layer 23 at both ends in the first direction X is relatively consistent, which can ensure the uniformity of the light-emitting functional layer 23, thereby facilitating the improvement of the light-emitting stability of the light-emitting device, and further improving the display effect of the display panel 100.

[0047] In some other examples, the dimension D3 of the first gap F1 in the first direction X and the dimension D4 of the second gap F2 in the first direction X may also be unequal.

[0048] In some embodiments, Figure 4 As shown, the light-emitting functional layer 23 includes a hole injection layer 231 and a light-emitting layer 232 sequentially arranged in a direction away from the substrate 11 . The hole injection layer 231 covers the first electrode 21 and partially fills the gap F. The light-emitting layer 232 covers the hole injection layer 231 .

[0049] The resistivity of the hole injection layer 231 is relatively small, and since there is a gap F between the first electrode 21 and the adjacent raised portion 132, during the process of making the hole injection layer 231, the ink used to form the hole injection layer 231 will fill the gap F between the first electrode 21 and the raised portion 132, which will result in a reduction in the climbing height of the hole injection layer 231, thereby facilitating the covering of the light-emitting layer 232, thereby avoiding the formation of a leakage path between the first electrode 21 and the second electrode due to the light-emitting layer 232 failing to effectively cover the hole injection layer 231.

[0050] In some examples, the light-emitting functional layer 23 further includes a hole transport layer located between the hole injection layer 231 and the light-emitting layer 232 , the hole transport layer covers the hole injection layer 231 , and the light-emitting layer 232 covers the hole transport layer.

[0051] In some examples, the light-emitting functional layer 23 also includes at least one of an electron transport layer and an electron injection layer located between the light-emitting layer 232 and the second electrode. When the light-emitting functional layer 23 includes the electron transport layer and the electron injection layer, the electron injection layer is located on the side of the electron transport layer close to the second electrode.

[0052] In some examples, such as Figure 3 , Figure 5 and Figure 6 As shown, the multiple light-emitting functional layers 23 may include a first light-emitting functional layer 2311, a second light-emitting functional layer 2312 and a third light-emitting functional layer 2313. The first light-emitting functional layer 2311, the second light-emitting functional layer 2312 and the third light-emitting functional layer 2313 are used to emit red light, green light and blue light, respectively, so that the display panel 100 can achieve color display.

[0053] In some embodiments, the surface of the protrusion 132 is hydrophobic. For example, a hydrophobic material is disposed on the surface of the protrusion 132. This can further avoid the problem of color mixing between the light-emitting devices on both sides of the protrusion 132.

[0054] In some examples, the surface of the protrusion 132 has fluorine elements. The aggregation of fluorine elements can make the protrusion 132 have good hydrophobicity, thereby avoiding the increase of thickness and process cost caused by adding a hydrophobic material layer.

[0055] During the manufacturing process of the flat layer 13, an initial flat layer can be provided on the driving circuit layer, and a material containing fluorine is provided on the surface of the initial flat layer away from the driving circuit layer, and then pre-baking is performed to make the surface of the initial flat layer away from the driving circuit layer accumulate fluorine. Then, the protrusion 132 and the via H are formed by a half-tone mask process, wherein the surface of the protrusion 132 away from the driving circuit layer has hydrophobicity due to the accumulation of fluorine.

[0056] In some embodiments, Figure 2 , Figure 5 as well as Figure 6 As shown, the first electrode 21 includes a main body 211 and a connecting portion 212 located on one side of the main body 211. The main body 211 is disposed on the flat layer 13 (e.g., the flat main body 131). The connecting portion 212 is partially located in the via hole H and is electrically connected to the driving circuit layer. The main body 211 can be electrically connected to the driving circuit layer through the connecting portion 212 partially filled in the via hole H, thereby realizing the introduction of the first electrode signal.

[0057] The display panel 100 further includes a plurality of flat portions 22 corresponding to the plurality of first electrodes 21 one by one, and the flat portions 22 at least cover the connection portions 212 of the corresponding first electrodes 21 .

[0058] Since the flat portion 22 covers the connecting portion 212, the via hole H can be effectively flattened, thereby avoiding a depression at the via hole H that would cause excessive consumption of ink (the ink is used to form the light-emitting functional layer 23), thereby saving ink usage.

[0059] In some examples, such as Figure 2 As shown, the flat portion 22 covers the connecting portion 212 of the corresponding first electrode 21 and the edge of the main body 211 of the adjacent first electrode 21 close to the connecting portion 212 , wherein the connecting portion 212 of the first electrode 21 corresponding to the flat portion 22 is away from the main body 211 .

[0060] For example, two adjacent first electrodes 21 in the second direction Y are respectively a first selected electrode 2111 and a second selected electrode 2112, and the flat portion 22 corresponding to the first selected electrode 2111 covers the connecting portion 212 of the first selected electrode 2111 (for the sake of clarity, it is distinguished here as the first connecting portion) and the edge of the second selected electrode 2112 close to the connecting portion 212 (i.e., the first connecting portion), and the connecting portion 212 (i.e., the first connecting portion) is located on the side of the main body 211 of the first selected electrode 2111 close to the second selected electrode 2112.

[0061] It is worth noting that after the first electrode 21 is formed, a step is formed between the edge of the first electrode 21 and the flat layer 13 below. The existence of the step will cause the thickness of the light-emitting functional layer 23 to be relatively thin at the step position during the process of drying the ink to form the light-emitting functional layer 23, which will cause the second electrode to easily contact the first electrode 21 at the step position after the second electrode is set, resulting in a short circuit problem.

[0062] Therefore, through the above-mentioned arrangement, the flat portion 22 can flatten the step formed between the first electrode 21 and the flat layer 13, which is beneficial to ensuring the thickness uniformity of the light-emitting functional layer 23 at this position, and avoiding the need to set more light-emitting functional layers 23 at this position, which leads to an increase in material costs; and, after the flat portion 22 can flatten the step formed between the first electrode 21 and the flat layer 13, the flatness at this position is also beneficial to the subsequent arrangement of the second electrode; in addition, the arrangement of the flat portion 22 can also cover the edge of the first electrode 21, thereby effectively isolating the first electrode 21 from the second electrode, thereby avoiding the problem of short circuit between the first electrode 21 and the second electrode.

[0063] In some examples, such as Figure 2 As shown, along the first direction X, the size of the main body 211 can be larger than the size of the connecting portion 212, so that the layout area of ​​the first electrode 21 can be reduced. In this case, the flat portion 22 can also cover the edge of the main body 211 of the corresponding first electrode 21 facing the connecting portion 212, so as to further ensure that the first electrode 21 corresponding to the flat portion 22 and the second electrode manufactured subsequently do not have a short circuit problem.

[0064] In some other examples, along the first direction X, the size of the main body 211 may also be equal to the size of the connecting portion 212 , which is not limited in the present application.

[0065] In some embodiments, the plurality of light-emitting functional layers 23 arranged along the second direction Y are connected to each other. That is, a plurality of first electrodes 21 are disposed in the pit K between two adjacent protrusions 132 , and the plurality of light-emitting functional layers 23 located on the plurality of first electrodes 21 are connected in sequence.

[0066] With such a configuration, when the ink used to form the light-emitting functional layer 23 enters the pit K by inkjet printing, the ink can only climb along the raised portions 132 on both sides of the pit K, while there will be no ink climbing phenomenon at the position between two adjacent first electrodes 21. This can improve the uniformity of the thickness of the light-emitting functional layer 23 finally formed, thereby improving the display effect of the display panel 100.

[0067] The plurality of light-emitting functional layers 23 along the first direction X may include a first light-emitting functional layer 2311 , a second light-emitting functional layer 2312 and a third light-emitting functional layer 2313 , so that color display of the display panel 100 can be achieved.

[0068] In some embodiments, Figure 7 and Figure 8 As shown, the flat layer 13 also includes a plurality of limiting portions 133 located on a side of the flat main body portion 131 away from the substrate 11 and arranged in an array. Two adjacent limiting portions 133 along the second direction Y are connected to two protruding portions 132 located on both sides of the limiting portion 133 and jointly define a light-emitting device area 130. The first electrode 21 and the light-emitting functional layer 23 are arranged in the light-emitting device area 130.

[0069] In this way, by providing a plurality of limit portions 133 and connecting two adjacent protrusions 132, a plurality of light-emitting device areas 130 can be defined, and each light-emitting device area 130 can be used to provide a corresponding light-emitting device. In this way, the number of light-emitting devices that can be independently controlled can be increased, thereby improving the resolution of the display panel 100.

[0070] In some embodiments, Figure 7 and Figure 8 As shown, there is a spacing between the first electrode 21 and at least one of the limiting portions 133 adjacent thereto. In this case, a gap can be formed between the first electrode 21 and at least one of the limiting portions 133 adjacent thereto, and the ink used to form the light-emitting functional layer 23 will be filled in the gap between the first electrode 21 and the limiting portion 133, so that part of the ink that would originally climb along the limiting portion 133 remains in the gap between the first electrode 21 and the limiting portion 133, thereby effectively alleviating the phenomenon of ink climbing, and further helping to improve the display effect of the display panel 100; and, since part of the ink remains in the gap between the first electrode 21 and the limiting portion 133, the height of the ink climbing can also be reduced, thereby effectively preventing the ink from overflowing the light-emitting device area 130 and causing color mixing to other light-emitting devices.

[0071] In some examples, there is a gap between the first electrode 21 and the two adjacent limiting portions 133. This can further effectively alleviate the phenomenon of ink climbing and prevent ink from overflowing the light-emitting device area 130 and causing color mixing to other light-emitting devices, thereby improving the display effect of the display panel 100.

[0072] In some embodiments, Figure 7 and Figure 8 As shown, all the limiting portions 133 and the protruding portions 132 are integrally formed, so that the flat layer 13 can be directly manufactured through a one-time process, thereby improving the manufacturing efficiency of the flat layer 13 .

[0073] In some examples, the surface of the limiting portion 133 is hydrophobic. For example, the surface of the limiting portion 133 is provided with a hydrophobic material, which can further avoid the problem of color mixing between the light emitting devices on both sides of the limiting portion 133.

[0074] For example, the surface of the limiting portion 133 may have fluorine element.

[0075] In some embodiments, the driving circuit layer 12 includes a plurality of pixel driving circuits, each of which can be electrically connected to a first electrode 21 , so that each pixel driving circuit can control the corresponding light-emitting device to emit light, thereby realizing the display function of the display panel 100 .

[0076] In some examples, the pixel driving circuit may be directly electrically connected to the first electrode 21 , or the pixel driving circuit may be electrically connected to the first electrode 21 through a converter, which is not limited in the present application.

[0077] In some embodiments, Figure 5 As shown, the pixel driving circuit includes a plurality of thin film transistors and at least one storage capacitor, wherein the thin film transistor includes an active layer, a gate electrode, a source electrode and a drain electrode arranged on a substrate 11. The film layer where the active layer is located is a semiconductor layer 121; the film layer where the gate electrode is located is a gate metal layer 123, and the film layer where the source electrode and the drain electrode are located is a source-drain metal layer 126.

[0078] Among them, a gate insulating layer 122 is provided between the semiconductor layer 121 and the gate metal layer 123; an interlayer insulating layer is provided between the gate metal layer 123 and the source-drain metal layer 126, for example, the interlayer insulating layer may include a first interlayer insulating layer 124 and a second interlayer insulating layer 125 arranged in sequence. In this case, a metal layer may be provided between the first interlayer insulating layer 124 and the second interlayer insulating layer 125 to arrange an electrode of a storage capacitor or other circuit components. A passivation layer 127 may also be provided on the side of the source-drain metal layer 126 away from the substrate 11.

[0079] One of the source and drain of the thin film transistor is electrically connected to the first electrode 21 of the light emitting device to transmit the first electrode signal to the first electrode 21, thereby driving the light emitting device to emit light. The source or drain of the thin film transistor can be electrically connected to the first electrode 21 of the light emitting device directly or indirectly.

[0080] In some examples, a connecting electrode layer 128 is further provided on the passivation layer 127, and the connecting electrode in the connecting electrode layer 128 is electrically connected to the source or drain of the thin film transistor through a via located on the passivation layer 127, and the connecting electrode is also electrically connected to the first electrode 21 of the light-emitting device through the via H, thereby realizing the transmission of the first electrode signal.

[0081] In some examples, an insulating layer 129 is further provided on the side of the connecting electrode layer 128 away from the substrate 11, and the insulating layer 129 exposes the connecting electrode in the connecting electrode layer 128 to achieve electrical connection between the connecting electrode and the first electrode 21. As a feasible method, the insulating layer 129 and the planar layer 13 can be manufactured at the same time.

[0082] It should be noted that the gate metal layer 123 may be located on the side of the semiconductor layer 121 away from or close to the substrate 11. In the case where the gate metal layer 123 is located on the side of the semiconductor layer 121 away from the substrate 11, the gate of the thin film transistor of the pixel driving circuit is located on the side of the active layer away from the substrate 11, and the thin film transistor is a top gate structure; in the case where the gate metal layer 123 is located on the side of the semiconductor layer 121 close to the substrate 11, the gate of the thin film transistor of the pixel driving circuit is located on the side of the active layer close to the substrate 11, and the thin film transistor is a bottom gate structure.

[0083] Some embodiments of the present application provide a display device, such as Fig. 9 As shown, the display device 200 includes the display panel 100 described in any one of the above embodiments.

[0084] Since the display device 200 includes the display panel 100 , it has all the technical effects of the display panel 100 , which will not be described in detail here.

[0085] In some examples, the display device 200 further includes a frame 201 for fixing the display panel 100 , so as to fix the display panel 100 .

[0086] In some examples, the display device 200 can be a watch, a tablet computer, a laptop computer, a display, a television, a billboard, a digital photo frame, a printer with a display function, a telephone, a mobile phone, a personal digital assistant (PDA), a digital camera, a portable camcorder, a viewfinder, a navigator, a home appliance, an information query device (such as a business query device for e-government, banks, hospitals, electricity, post offices, etc.), and any other component with a display function. The embodiment of the present application does not impose any special restrictions on the specific form of the above-mentioned display device 200.

[0087] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A display panel, characterized in that: include: substrate; A flat layer, disposed on the substrate, the flat layer comprising a flat main body and a plurality of raised portions located on a side of the flat main body away from the substrate, each of the raised portions extending along the second direction and the plurality of raised portions arranged side by side along the first direction; a plurality of first electrodes disposed on the flat main portion and distributed in an array, wherein each of the first electrodes is disposed between two adjacent protrusions in the first direction, and a gap exists between the first electrode and at least one of the adjacent protrusions; and A plurality of light-emitting functional layers are provided, wherein the light-emitting functional layers cover the first electrode and partially fill the gap.

2. The display panel according to claim 1, characterized in that: A size of the gap in the first direction is less than or equal to 1 μm.

3. The display panel according to claim 1, characterized in that: There is a gap between the first electrode and the two protrusions adjacent to the first electrode, and the gaps on both sides of the first electrode are equal.

4. The display panel according to claim 1, characterized in that: The light-emitting functional layer includes a hole injection layer and a light-emitting layer which are sequentially arranged in a direction away from the substrate. The hole injection layer covers the first electrode and partially fills the gap. The light-emitting layer covers the hole injection layer.

5. The display panel according to claim 1, characterized in that: The surface of the protrusion is provided with a hydrophobic material.

6. The display panel according to any one of claims 1 to 5, characterized in that: The display panel further includes a driving circuit layer, the driving circuit layer is arranged on the substrate, the flat layer is arranged on the driving circuit layer, a via hole is arranged on the flat layer, the first electrode includes a main body and a connecting part located on one side of the main body, the main body is arranged on the flat layer, the connecting part is partially located in the via hole and is electrically connected to the driving circuit layer; wherein, The display panel further includes a plurality of flat portions corresponding to the plurality of first electrodes one by one, and the flat portions at least cover corresponding connection portions of the first electrodes.

7. The display panel according to claim 6, characterized in that: Two adjacent first electrodes in the second direction are respectively a first selected electrode and a second selected electrode, and the flat portion corresponding to the first selected electrode covers a connecting portion of the first selected electrode and an edge of the second selected electrode close to the connecting portion, and the connecting portion is located on a side of the main body of the first selected electrode close to the second selected electrode.

8. The display panel according to any one of claims 1 to 5, characterized in that: The flat layer also includes a plurality of limiting portions arranged in an array and located on a side of the flat main portion away from the substrate. Two adjacent limiting portions along the second direction are connected to the two raised portions located on both sides of the limiting portions and jointly define a light-emitting device area. The first electrode and the light-emitting functional layer are both arranged in the light-emitting device area.

9. The display panel according to claim 8, characterized in that: The flat main body portion, the limiting portion and the protruding portion are integrally formed, and hydrophobic material is provided on surfaces of the limiting portion and the protruding portion facing away from the substrate.

10. A display device, characterized in that: include: A display panel as claimed in any one of claims 1 to 9.

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