Display panel and display device

Abstract

The embodiment of the present invention discloses a display panel and a display device. The display panel includes a substrate; a light-emitting element located on one side of the substrate; an electrode located on one side of the light-emitting element; and a light-shielding layer located at least partially on a side of the light-emitting element away from the substrate, wherein the light-shielding layer and the electrode at least partially overlap along the thickness direction of the display panel. By setting the light-shielding layer and the electrode to at least partially overlap along the thickness direction of the display panel, the light-shielding layer shields the electrode, and when the external ambient light enters the interior of the light-emitting element, the metal reflected light reflected by the electrode is absorbed by the light-shielding layer, thereby reducing the probability of the metal reflected light emitting, and ensuring the normal display of the light-emitting element.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of display panels, and in particular to a display panel and a display device. Background Art

[0002] When the existing display panel is in use, the metal wiring in the display panel will reflect the ambient light, so that light crosstalk is easily generated during the display process, which seriously affects the display effect of the display panel. Summary of the invention

[0003] The embodiments of the present invention provide a display panel and a display device, wherein the projections of the shading layer and the electrode at least partially overlap, and the light reflected by the electrode is absorbed by the shading layer, thereby preventing the metal reflected light from affecting the normal light emission of the light-emitting element and further affecting the display effect of the display panel.

[0004] In a first aspect, an embodiment of the present invention provides a display panel, comprising: a substrate;

[0005] A light emitting element located on one side of the base substrate;

[0006] an electrode located on one side of the light emitting element;

[0007] The light shielding layer is at least partially located on a side of the light emitting element away from the base substrate, and along the thickness direction of the display panel, the light shielding layer at least partially overlaps with the electrode.

[0008] In a second aspect, an embodiment of the present invention further provides a display device, comprising the display panel described in any one of the first aspects.

[0009] The present invention provides a display panel and a display device. The display panel includes a light-emitting element, an electrode located on one side of the light-emitting element, and a light-shielding layer at least partially located on a side of the light-emitting element away from a substrate. Along the thickness direction of the display panel, the light-shielding layer and the electrode at least partially overlap, so that the light-shielding layer blocks the electrode, and then the external ambient light enters the interior of the light-emitting element. The light reflected by the electrode is absorbed by the light-shielding layer, thereby reducing the probability of metal reflected light being emitted, thereby ensuring normal display of the light-emitting element. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, although the drawings described below are some specific embodiments of the present invention, for those skilled in the art, the basic concepts of the device structure, driving method and manufacturing method disclosed and suggested by the various embodiments of the present invention can be expanded and extended to other structures and drawings, and there is no doubt that these should be within the scope of the claims of the present invention.

[0011] Figure 1 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention;

[0012] Figure 2 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0013] Figure 3 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0014] Figure 4 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0015] Figure 5 A schematic diagram of the structure of a light emitting element provided by an embodiment of the present invention;

[0016] Figure 6 A schematic diagram of the structure of another light emitting element provided by an embodiment of the present invention;

[0017] Figure 7 A schematic diagram of the structure of another light emitting element provided by an embodiment of the present invention;

[0018] Figure 8 A schematic diagram of the structure of another light emitting element provided by an embodiment of the present invention;

[0019] Fig. 9 A schematic diagram of the structure of another light emitting element provided by an embodiment of the present invention;

[0020] Fig.10 A schematic diagram of the structure of another light emitting element provided by an embodiment of the present invention;

[0021] Fig.11 A schematic diagram of the structure of another light emitting element provided by an embodiment of the present invention;

[0022] Fig.12 A schematic diagram of the structure of another light emitting element provided by an embodiment of the present invention;

[0023] Fig.13 A schematic diagram of the structure of another light emitting element provided by an embodiment of the present invention;

[0024] Fig.14 A schematic diagram of the structure of another light emitting element provided by an embodiment of the present invention;

[0025] Fig.15 A schematic diagram of the structure of another light emitting element provided by an embodiment of the present invention;

[0026] Fig.16A schematic diagram of the structure of another light emitting element provided by an embodiment of the present invention;

[0027] Fig.17 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0028] Fig.18 A schematic diagram of a top view of a light emitting element provided by an embodiment of the present invention;

[0029] Fig.19 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0030] Fig. 20 A schematic diagram of the structure of another light emitting element provided by an embodiment of the present invention;

[0031] Fig.21 A schematic diagram of the structure of another light emitting element provided by an embodiment of the present invention;

[0032] Fig. 22 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0033] Fig.23 A schematic structural diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described through implementation methods with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the basic concepts disclosed and suggested by the embodiments of the present invention, all other embodiments obtained by those skilled in the art are within the scope of protection of the present invention.

[0035] In the existing display panel, the electrode of the light-emitting element is bonded to the substrate electrode on one side of the array substrate, so that the light-emitting element receives the driving signal on one side of the array substrate to realize display. However, since the electrode of the light-emitting element and the substrate electrode are both metal electrodes, after the external ambient light enters the display panel, it will generate metal reflected light after passing through the metal electrode. The metal reflected light will interfere with the normal light emitted by the light-emitting element, making it easy to generate halo and crosstalk during the display process, seriously affecting the display effect of the display panel.

[0036] In view of the problems of the background technology, an embodiment of the present invention provides a display panel, including: the display panel includes: a substrate; a light-emitting element located on one side of the substrate; an electrode located on one side of the light-emitting element; a light-shielding layer at least partially located on the side of the light-emitting element away from the substrate, and along the thickness direction of the display panel, the light-shielding layer and the electrode at least partially overlap. By reasonably setting the light-shielding unit, the light-shielding layer shields at least part of the electrode, and then when the external ambient light enters the interior of the light-emitting element, the metal reflected light reflected by the electrode will be absorbed by the light-shielding layer, reducing the probability of the metal reflected light emitting, and ensuring the normal display of the light-emitting element.

[0037] The above is the core idea of ​​the present invention. The technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Figure 1 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention, Figure 2 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention, Figure 3 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention, Figure 4 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the display panel 100 includes: a base substrate 101; a light-emitting element 102 located on one side of the base substrate 101; an electrode 103 located on one side of the light-emitting element 102; and a light-shielding layer 104 at least partially located on a side of the light-emitting element 102 away from the base substrate 101, and along the thickness direction of the display panel 100 (such as the X direction in the figure), the light-shielding layer 104 and the electrode 103 at least partially overlap.

[0039] Among them, the base substrate 101 may include a substrate and an array substrate 105 located on one side of the substrate. The substrate may include a rigid base substrate or a flexible base substrate. The array substrate 105 includes a driving circuit 1051. The driving circuit 1051 may include a substrate electrode and a storage capacitor. The embodiment of the present invention does not limit the specific structure of the driving circuit. The driving circuit 1051 can be electrically connected to the light-emitting element 102 through the substrate electrode to drive the light-emitting element 102 to emit light normally. The electrode 103 is located between the light-emitting element 102 and the base substrate 101. The electrode 103 may include a cathode or an anode on one side of the light-emitting element 102, a binding electrode between the cathode or an anode on one side of the light-emitting element 102 and the driving circuit 1051, and other metal materials to achieve a fixed electrical connection between the light-emitting element 102 and the base substrate 101, thereby ensuring the structural stability and service life of the formed display panel 100. A light shielding layer 104 is provided on the side of the light-emitting element 102 away from the base substrate 101. Along the thickness direction of the display panel 100, the light shielding layer 104 at least partially overlaps with the electrode 103, such as Figure 1 and Figure 2 As shown, the light shielding layer 104 partially overlaps with the electrode 103. Figure 3 As shown, the light shielding layer 104 completely overlaps with the electrode 103, and the light shielding layer 104 can be in direct contact with the electrode 103; or as shown in FIG. Figure 4 As shown, the shading layer 104 can be in indirect contact with the electrode 103 through the encapsulation layer 1001. The shading layer 104 can be a black insulating material to prevent the light reflected by the electrode 103 from affecting the normal light emission of the light-emitting element 102. At the same time, the shading layer 104 can also absorb part of the light incident from the outside into the display panel 100, thereby reducing the impact of the external incident light on the normal display of the display panel 100.

[0040] In the embodiment of the present invention, a light-shielding layer is arranged on the side of the light-emitting element away from the substrate. Along the thickness direction of the display panel, the light-shielding layer and the electrode at least partially overlap, so that the light-shielding layer blocks the electrode, and then the external ambient light enters the interior of the light-emitting element. The light reflected by the electrode is absorbed by the light-shielding layer, thereby reducing the probability of metal reflected light being emitted, thereby ensuring normal display of the light-emitting element.

[0041] Figure 5 A schematic diagram of the structure of a light emitting element provided by an embodiment of the present invention, Figure 6 A schematic diagram of the structure of another light emitting element provided in an embodiment of the present invention, Figure 7 A schematic diagram of the structure of another light emitting element provided by an embodiment of the present invention is shown in FIG. Figure 5 , Figure 6 and Figure 7As shown, optionally, the light-emitting element 102 also includes a light-emitting body 1021, which is electrically connected to the electrode 103 and the electrode 103 is located on one side of the light-emitting body 1021; a step structure 106 is provided in the light-emitting body 1021, and the step structure 106 is located on the side of the light-emitting body 1021 away from the base substrate 101, and along the thickness direction of the display panel 100, the light-shielding layer 104 at least partially overlaps with the step structure 106.

[0042] Among them, the light-emitting element 102 includes a light-emitting body 1021, and the light-emitting body 1021 includes a semiconductor layer, a light-emitting composite layer 107 and other film layers. The light-emitting body 1021 is electrically connected to the electrode 103, and then connected to the driving circuit 1051 on one side of the array substrate 105 through the electrode 103, and the driving signal is connected to ensure the light-emitting effect of the light-emitting element 102; a step structure 106 is arranged in the light-emitting body 1021, and the shape of the step structure 106 can be a square, a rectangle, a regular trapezoid, an inverted trapezoid and the like. The specific shape can be obtained by etching according to actual needs, and the embodiment of the present invention does not make specific limitations. In the embodiments of the present invention, the shape of the step structure 106 is exemplarily shown as a rectangle. The step structure 106 is located on the side of the light-emitting body 1021 away from the base substrate 101. The step structure 106 is formed by etching the film layer in the light-emitting body 1021. Since the light-emitting element 102 includes a cathode and an anode, the step structure 106 can be set on one side or on both sides. Therefore, along the thickness direction of the display panel 100, such as Figure 5 As shown, the projection of the step structure 106 may at least partially overlap with the projection of the cathode; Figure 6 As shown, the projection of the step structure 106 may at least partially overlap with the projection of the anode; or Figure 7 As shown, the projection of the step structure 106 can overlap at least partially with the projections of the cathode and the anode, respectively. The specific arrangement of the step structure 106 can be selected according to actual design requirements, and the embodiment of the present invention does not specifically limit it. Along the thickness direction of the display panel 100, the light shielding layer 104 overlaps at least partially with the step structure 106. The light shielding layer 104 can cover the step structure on one side or both sides. The light shielding layer 104 can directly cover the step structure 106, such as Figure 5 , Figure 6 and Figure 7 As shown, the shading layer 104 is in direct contact with the step structure 106, and the light-emitting surface of the light-emitting element 102 is flush with the surface of the light-emitting layer 104 away from the base substrate 101, thereby ensuring the light-emitting range and light-emitting effect of the light-emitting element 102; or the shading layer 104 can be set after the light-emitting element 102 is packaged, so that the projection of the light-shielding layer 104 overlaps with the projection of the step structure 106, so that the setting of the light-shielding layer 104 can reduce the light reflected by the metal, thereby ensuring the display effect of the light-emitting element 102.

[0043] Continue to refer Figure 5 , Figure 6 and Figure 7 As shown, optionally, along the thickness direction of the display panel 100 , the light shielding layer 104 covers the step structure 106 .

[0044] Among them, along the thickness direction of the display panel 100, the shading layer 104 is in direct contact with the step structure 106, and the coverage area of ​​the shading layer 104 is greater than or equal to the coverage area of ​​the step structure 106, so that the shading layer 104 can effectively block the external ambient light from the metal reflected light generated by the electrode 103, thereby reducing the interference of the metal reflected light on the normal output light of the light-emitting element 102, thereby ensuring the display effect of the light-emitting element 102.

[0045] Figure 8 A schematic diagram of the structure of another light emitting element provided by an embodiment of the present invention is shown in FIG. Figure 8 As shown, optionally, the light emitting body 1021 includes a light emitting composite layer 107 , and along the thickness direction of the display panel 100 , the light shielding layer 104 at most partially overlaps with the light emitting composite layer 107 .

[0046] The light-emitting body 1021 includes a light-emitting composite layer 107, which is used to capture electrons and holes and make them recombine to generate photons, thereby making the light-emitting element 102 emit light. The coverage area of ​​the light-emitting composite layer 107 determines the light-emitting area of ​​the light-emitting element 102. Along the thickness direction of the display panel 100, the light-shielding layer 104 overlaps with the light-emitting composite layer 107 at most. Figure 5 , Figure 6 and Figure 7 As shown, the light shielding layer 104 and the light emitting composite layer 107 may partially overlap, as shown in FIG. Figure 8 As shown, the light shielding layer 104 does not overlap with the light emitting composite layer 107. When the light shielding layer 104 partially overlaps with the light emitting composite layer 107, the light shielding layer 104 blocks part of the edge of the light emitting composite layer 107. Since the light emitting composite layer at the edge of the light emitting element 102 is unstable and has low brightness, it has little effect on the light output of the light emitting element 102. The light shielding layer 104 blocks part of the light emitting composite layer 107, exposing the effective light emitting composite layer 107 and improving brightness uniformity.

[0047] Continue to refer Figure 8 Optionally, along the thickness direction of the display panel 100 , the light shielding layer 104 and the light emitting composite layer 107 do not overlap.

[0048] Among them, along the thickness direction of the display panel 100, when the projection of the light-shielding layer 104 and the projection of the light-emitting composite layer 107 do not overlap at all, the setting of the light-shielding layer 104 will not block the normal light-emitting area of ​​the light-emitting element 102. During the preparation of the light-emitting composite layer 107, the setting position of the light-shielding layer 104 can be avoided, that is, the projection of the light-emitting composite layer 107 and the electrode 103 on one side of the light-emitting element 102 does not overlap, thereby ensuring the display effect of the light-emitting element 102.

[0049] Fig. 9 A schematic diagram of the structure of another light emitting element provided in an embodiment of the present invention, Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, optionally, the light emitting body 1021 includes a light emitting composite layer 107 , and along the thickness direction of the display panel 100 , the light emitting composite layer 107 at most partially overlaps with the electrode 103 .

[0050] Among them, Figure 5 , Figure 6 , Figure 7 and Fig. 9 As shown, along the thickness direction of the display panel 100, the light emitting composite layer 107 and the electrode 103 are partially overlapped at most, that is, the light emitting composite layer 107 and the electrode 103 are partially overlapped. Further, as shown in FIG. Figure 8 As shown, the light-emitting composite layer 107 may not overlap with the electrode 103 at all. During the production process of the light-emitting composite layer 107, the coverage of the electrode 103 is avoided or the electrode 103 is epitaxially arranged to reduce the overlap with the projection of the light-emitting composite layer 107 as much as possible, so as to avoid the overlap between the light-emitting composite layer 107 and the electrode 103 during the process of the light-shielding layer 104 shielding the electrode 103. As a result, the light-shielding layer 104 will also shield the light-emitting composite layer 107, thereby sacrificing the light-emitting area of ​​the light-emitting element 102 and affecting the display effect of the light-emitting element 102.

[0051] Fig.10 A schematic diagram of the structure of another light emitting element provided by an embodiment of the present invention is shown in FIG. Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, optionally, the electrode 103 is located on the side of the light-emitting body 1021 close to the base substrate 101; the light-emitting body 1021 includes a light-emitting composite layer 107 and other film layers 108 located on the side of the light-emitting composite layer 107 away from the base substrate 101; and a step structure 106 is provided in the other film layers 108.

[0052] Among them, the electrode 103 is located on the side of the light-emitting body 1021 close to the base substrate 101; the light-emitting body 1021 includes a light-emitting composite layer 107 and other film layers 108 located on the side of the light-emitting composite layer 107 away from the base substrate 101. At this time, the light-emitting element 102 is a flip chip, and the electrode 103 is electrically connected to the substrate electrode in the driving circuit 1051 on one side of the array substrate 105. The light-emitting element 102 includes other film layers 108 located on the side of the light-emitting composite layer 107 away from the base substrate 101. The other film layers 108 may include a semiconductor layer, a buffer layer 110, and a current expansion layer. In order to ensure the subsequent deposition of the light-shielding layer 104, the other film layers 108 can be reused. , etching to form a step structure 106, avoiding etching of the light-emitting composite layer 107, affecting the light-emitting area of ​​the light-emitting element 102, preparing a shading layer 104 in the step structure 106, thereby ensuring that the shading layer 104 absorbs the metal reflected light generated by the electrode 103, and etching the step structure 106 in the film layer away from the side of the substrate 101 can reduce the impact on the light emitting side surface 113 of the light-emitting element 102. At the same time, other film layers 108 in the light-emitting element 102 can be reused, so that the surface of the shading layer 104 away from the side of the substrate 101 can be flush with the light emitting surface of the light-emitting element 102, thereby ensuring the overall thickness of the light-emitting element 102 and the display effect of the light-emitting element 102.

[0053] Continue to refer Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 Optionally, the other film layer 108 includes a first semiconductor layer 109 and a buffer layer 110 which are stacked, the buffer layer 110 is provided with a step structure 106 , or the buffer layer 110 and the first semiconductor layer 109 are provided with a step structure 106 .

[0054] Among them, the first semiconductor layer 109 can be obtained by N-type doping of GaN material, and the N-type doped material can be aluminum (Al), germanium (Ge), selenium (Se), tellurium (Te), carbon (C), etc. The buffer layer 110 is located on the side of the substrate 101 away from the light-emitting composite layer 107. The buffer layer 110 can be composed of materials such as SiO2 and SiN, which can play a buffering and protective role for the light-emitting element 102. When preparing the step structure 106, other film layers 108 in the light-emitting element 102 can be reused for etching to form the step structure 106, thereby ensuring the overall thickness of the display panel 100, which is convenient for lightweight production. Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, during the etching process, only the buffer layer 110 may be etched to form the step structure 106; Fig.10 As shown, the buffer layer 110 and the first semiconductor layer 109 can also be etched during the etching process to form a step structure 106, thereby reducing the optical crosstalk caused by the side light to the adjacent light-emitting element 102. The specific etching depth and the etched film layer can be selected according to actual design requirements, and the embodiment of the present invention does not make specific limitations.

[0055] Fig.11 A schematic diagram of the structure of another light emitting element provided in an embodiment of the present invention, Fig.12 A schematic diagram of the structure of another light emitting element provided by an embodiment of the present invention is shown in FIG. Fig.11 and Fig.12 As shown, optionally, the electrode 103 is located on a side of the light-emitting body 1021 away from the base substrate 101; the light-emitting body 1021 includes a first semiconductor layer 109, a light-emitting composite layer 107 and a second semiconductor layer 111 which are sequentially located on one side of the base substrate 101, the step structure 106 includes a first sub-step structure 1061, at least the second semiconductor layer 111 and the light-emitting composite layer 107 are provided with the first sub-step structure 1061, and the first sub-step structure 1061 exposes a portion of the first semiconductor layer 109; the electrode 103 includes a first electrode 1031, and the first electrode 1031 is electrically connected to the first semiconductor layer 109 exposed by the first sub-step structure 1061; the light-shielding layer 104 covers at least a portion of the first electrode 1031.

[0056] The light emitting element 102 is a positive chip, and the electrode 103 is located on the side of the light emitting body 1021 away from the base substrate 101; the light emitting body 1021 includes a first semiconductor layer 109, a light emitting composite layer 107, and a second semiconductor layer 111, which are sequentially located on one side of the base substrate 101. The first semiconductor layer 109 can be obtained by N-type doping of GaN material, and the second semiconductor layer 111 can be obtained by P-type doping of GaN material. The P-type doped material can be magnesium (Mg), zinc (Zn), beryllium (Be), calcium (Ca), strontium (Sr), barium (Ba), etc. The step structure 106 includes a first sub-step structure 1061, and the second semiconductor layer 111 and the light emitting composite layer 107 are etched to form the first sub-step structure 1061. The first sub-step structure 1061 is provided in the second semiconductor layer 111 and the light emitting composite layer 107. Fig.11 As shown, the first sub-step structure 1061 just exposes the surface of the first semiconductor layer 109 away from the substrate 101; Fig.12As shown, the second semiconductor layer 111, the light-emitting composite layer 107 and the first semiconductor layer 109 are etched to form a first sub-step structure 1061, and the first sub-step structure 1061 exposes a portion of the first semiconductor layer 109; a first electrode 1031 is set in the first sub-step structure 1061, and the first electrode 1031 is a cathode, and the first electrode 1031 is electrically connected to the first semiconductor layer 109, and the anode is located on the surface of the second semiconductor layer 111 away from the substrate 101 and covers the second semiconductor layer 111, and the anode can be a transparent metal material such as indium tin oxide to ensure the normal light emission of the light-emitting element 102. A light shielding layer 104 is set on the side of the first electrode 1031 away from the substrate 101, and the light shielding layer 104 at least partially covers the first electrode 1031, Fig.11 and Fig.12 In the figure, the light shielding layer 104 completely covers the first electrode 1031 as an example. The light shielding layer 104 can block the metal reflected light reflected by the first electrode 1031 to prevent the metal reflected light from affecting the light emitting element 102, so as to ensure the display effect of the light emitting element 102.

[0057] Fig.13 A schematic diagram of the structure of another light emitting element provided in an embodiment of the present invention, Fig.14 A schematic diagram of the structure of another light emitting element provided in an embodiment of the present invention, Fig.15 A schematic diagram of the structure of another light emitting element provided in an embodiment of the present invention, Fig.16 A schematic diagram of the structure of another light emitting element provided by an embodiment of the present invention is shown in FIG. Fig.13 , Fig.14 , Fig.15 and Fig.16 As shown, optionally, the light-emitting body 1021 also includes a current spreading layer 112 located on the side of the second semiconductor layer 111 away from the base substrate 101, and the current spreading layer 112 is in contact with the second semiconductor layer 111; the step structure 106 also includes a second sub-step structure 1062, and at least the current spreading layer 112 is provided with the second sub-step structure 1062; the electrode 103 also includes a second electrode 1032, and the second electrode 1032 is electrically connected to the current spreading layer 112 and covers the second sub-step structure 1062; the light-shielding layer 104 covers at least a portion of the second electrode 1032.

[0058] The light emitting element 102 is a front-mounted chip, and the light emitting body 1021 includes a current spreading layer 112 located on the side of the second semiconductor layer 111 away from the base substrate 101, and the current spreading layer 112 is in contact with the second semiconductor layer 111. The current spreading layer 112 is used to eliminate the serious problem of current congestion during the movement of the current, so that the current spreads evenly, thereby ensuring the working life of the light emitting element 102. The step structure 106 includes a first sub-step structure 1061, the first electrode 1031 is electrically connected to the first semiconductor layer 109 exposed by the first sub-step structure 1061, and the step structure also includes a second sub-step structure 1062, and at least the second sub-step structure 1062 is provided in the current spreading layer 112. Fig.13 As shown, the second sub-step structure 1062 can only etch the current spreading layer 112, so that the current spreading layer 112 is electrically connected to the second electrode 1032; Fig.14 and Fig.15 As shown, the etching depth of the second sub-step structure 1062 can also be made the same as the etching depth of the first sub-step structure 1061, simplifying the manufacturing process so that the first sub-step structure 1061 and the second sub-step structure 1062 can be formed simultaneously. The light shielding layer 104 covers at least a portion of the second electrode 1032, and the light shielding layer 104 absorbs the metal reflected light reflected by the second electrode 1032. For example, Fig.14 As shown, the light shielding layer 104 covers part of the second electrode 1032 to avoid shielding part of the light emitting composite layer 107 and affecting the light emitting area of ​​the light emitting element 102; Fig.15 As shown, the light shielding layer 104 completely covers the second electrode 1032, absorbs the metal reflected light reflected by the second electrode 1032, reduces the interference of the metal reflected light on the light emitting element 102, and ensures the light emitting effect of the light emitting element 102. Fig.16 As shown, the shading layer 104 completely covers the second electrode 1032, and along the thickness direction of the display panel 100, the projection of the light-emitting composite layer 107 does not overlap with the projection of the second electrode 1032, so the metal reflected light reflected by the second electrode 1032 is absorbed, thereby reducing the interference of the metal reflected light on the light emitting element 102, while ensuring the light emitting area of ​​the light emitting element 102 and the light emitting effect of the light emitting element 102.

[0059] Fig.17 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Fig.17 As shown, optionally, the light emitting element 102 includes a side light emitting surface 113 ; the display panel 100 further includes a driving circuit 1051 located between the base substrate 101 and the light emitting element 102 ; and the light shielding layer 104 covers the side light emitting surface 113 and the driving circuit 1051 .

[0060] Among them, the light emitting element 102 includes a side light emitting surface 113. In order to prevent the light emitted by the side light emitting surface 113 from causing light crosstalk between adjacent light emitting elements 102, the side light emitting surface 113 can be shielded by a light shielding layer 104. The display panel 100 also includes a driving circuit 1051 located between the base substrate 101 and the light emitting element 102. The driving circuit 1051 is made of metal material. The light shielding layer 104 covers the driving circuit 1051 to prevent the metal reflected light of the driving circuit 1051 on one side of the array substrate 105 from affecting the normal light emission of the light emitting element 102. On the basis of covering the electrode 103, the light shielding layer 104 also covers the side light emitting surface 113 and the driving circuit 1051, further reducing the metal reflected light in the display panel 100, and effectively improving the display effect of the display panel 100. The light shielding layer 104 can also absorb part of the external ambient light incident on the light emitting element 102, effectively reducing the display effect of the external ambient light on the light emitting element 102, thereby ensuring the display effect of the display panel 100. At the same time, the specific configuration of the driving circuit 1051 may be different according to the different driving modes of the light emitting element 102. Specifically, when the driving mode of the light emitting element 102 is active driving, the driving circuit 1051 may include a plurality of thin film transistors, and the light emitting element 102 is driven to emit light through the thin film transistors; when the driving mode of the light emitting element 102 is passive driving, the driving circuit 1051 may include a cathode signal line and an anode signal line, and the cathode signal line and the anode signal line are used to provide the light emitting element 102 with the cathode signal and the anode signal required for emitting light, so as to drive the light emitting element 102 to emit light. The specific configuration of the pixel driving circuit 1051 is not described in the embodiment of the present invention.

[0061] Fig.18 A schematic diagram of a top view structure of a light emitting element provided in an embodiment of the present invention is shown in FIG. Fig.17 and Fig.18 Optionally, along the thickness direction of the display panel 100 , the step structure 106 covers the electrode 103 .

[0062] Among them, along the thickness direction of the display panel 100, the projection area of ​​the step structure 106 completely covers the projection area of ​​the electrode 103, so that a shading layer 104 is set in the step structure 106, and the projection area of ​​the shading layer 104 can cover the electrode 103, thereby absorbing the light reflected by the electrode 103, reducing the interference of the metal reflected light on the normal display light of the light-emitting element 102, and improving the light-emitting effect of the light-emitting element 102.

[0063] Continue to refer Fig.17 and Fig.18Optionally, the electrode 103 includes a binding electrode 114 and a light-emitting element electrode 115, the binding electrode 114 is located on the side of the light-emitting element electrode 115 facing the base substrate 101, the binding electrode 114 is at least partially in contact with the light-emitting element electrode 115, along the thickness direction of the display panel 100, the binding electrode 114 covers the light-emitting element electrode 115, and the projection area of ​​the binding electrode 114 on the base substrate 101 is larger than the projection area of ​​the light-emitting element electrode 115 on the base substrate 101; the light-shielding layer 104 covers the binding electrode 114.

[0064] The light-emitting element electrode 115 is the first electrode 1031 and the second electrode 1032 located on one side of the light-emitting body 1021. When the motor is bonded to the substrate electrode on the side of the driving circuit 1051, in order to ensure a good bonding effect and thus ensure the stability of the display panel 100 structure, a binding electrode 114 is provided between the light-emitting element electrode 115 and the substrate electrode. The binding electrode 114 is at least partially in contact with the light-emitting element electrode 115. In the actual manufacturing process of the display panel 100, the binding electrode 114 is bonded along the thickness direction of the display panel 100. The electrode 114 covers the light-emitting element electrode 115, and the projection area of ​​the binding electrode 114 on the base substrate 101 is larger than the projection area of ​​the light-emitting element electrode 115 on the base substrate 101. Since the material of the binding electrode 114 is generally a eutectic material composed of gold and indium, it will also produce metal reflected light to the external ambient light, which interferes with the light output of the light-emitting element 102. Therefore, a shading layer 104 is provided to cover the binding electrode 114, so that the shading layer 104 absorbs the metal reflected light reflected by the binding electrode 114, thereby ensuring the normal display effect of the display panel 100.

[0065] Fig.19 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Fig.19 As shown, optionally, along the thickness direction perpendicular to the display panel 100 (such as the Y direction in the figure), the shading layer 104 includes a first edge 116 close to the light-emitting composite layer 107, the light-emitting composite layer 107 includes a second edge 117 close to the shading layer 104, the binding electrode 114 includes a third edge 118 close to the light-emitting composite layer 107, and the light-emitting element electrode 115 includes a fourth edge 119 close to the light-emitting composite layer 107; along the thickness direction of the display panel 100, the projection of the first edge 116 is located between the projection of the third edge 118 and the projection of the second edge 117, and the projection of the third edge 118 is located between the projection of the first edge 116 and the projection of the fourth edge 119.

[0066] In the thickness direction of the display panel 100, since the coverage area of ​​the binding electrode 114 is larger than the area of ​​the light emitting element electrode 115, when the binding electrode 114 completely covers the light emitting element electrode 115, in order to effectively reduce the metal reflected light, the light shielding layer 104 should completely cover the binding electrode 114 and the light emitting element electrode 115, that is, the projection of the third edge 118 of the binding electrode 114 close to the light emitting composite layer 107 is located between the projection of the fourth edge 119 of the light emitting element electrode 115 close to the light emitting composite layer 107 and the projection of the first edge 116 of the light shielding layer 104 close to the light emitting composite layer 107, so as to ensure that the light shielding layer 104 covers the binding electrode 114 and the shielding effect of the light-emitting element 102; at the same time, to ensure that the shielding layer does not affect the light emitting area of ​​the light-emitting element 102, the projection of the first edge 116 of the light-shielding layer 104 close to the light-emitting composite layer 107 is located between the projection of the third edge 118 of the binding electrode 114 close to the light-emitting composite layer 107 and the projection of the second edge 117 of the light-emitting composite layer 107 close to the light-shielding layer 104, so as to avoid the light-shielding layer 104 blocking the composite light-emitting layer, while ensuring that the light-shielding layer 104 absorbs the metal reflected light, effectively ensuring the light emitting area of ​​the light-emitting element 102, ensuring the display effect of the light-emitting element 102, and further ensuring the display effect of the display panel 100.

[0067] Continue to refer Figure 1 Optionally, along the thickness direction of the display panel 100 , a height H of the step structure 106 satisfies H=M / m, wherein M is the total optical density of the light shielding layer 104 and M≥1.0; and m is the optical density within a unit thickness.

[0068] Among them, in order to ensure that the shading layer 104 has a good shading effect, it is necessary to ensure that the total optical density M of the shading layer 104 located in the display panel 100 is ≥1.0, and the setting height H of the corresponding step structure 106 is also related to the optical density of the shading layer 104. For example, when the total optical surface density M is 1.0, the optical density within a unit thickness is 1.25 / μm. At this time, the height H of the step structure 106 is 0.8μm. The total optical density of the shading layer 104 can be selected according to actual design requirements, and the embodiment of the present invention does not make specific limitations.

[0069] Fig. 20 A schematic diagram of the structure of another light emitting element provided in an embodiment of the present invention, Fig.21 A schematic diagram of the structure of another light emitting element provided by an embodiment of the present invention is shown in FIG. Fig. 20 and Fig.21As shown, optionally, the electrode 103 includes a first electrode 1031 and a second electrode 1032 arranged at intervals; the light-emitting element 102 includes a first light-emitting element 1022 and a second light-emitting element 1023 arranged adjacent to each other, and the first light-emitting element 1022 and the second light-emitting element 1023 share the first electrode 1031 .

[0070] Among them, the first electrode 1031 and the second electrode 1032 are arranged at intervals; the first electrode 1031 is an anode and the second electrode 1032 is a cathode, or the second electrode 1032 is an anode and the first electrode 1031 is a cathode. The types of the first electrode 1031 and the second electrode 1032 can be selected according to the specific design requirements of the light-emitting element 102. For the display panel 100 including multiple light-emitting elements 102, for the adjacently arranged first light-emitting element 1022 and the second light-emitting element 1023, the first light-emitting element 1022 and the second light-emitting element 1023 share the first electrode 1031, which simplifies the process flow and reduces the difficulty of production. At the same time, the first electrode 1031 is blocked by the same shading layer 104, eliminating the metal reflected light of the first electrode 1031, thereby ensuring the display effect of the display panel 100.

[0071] Fig. 22 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention is shown in FIG. Fig. 22 As shown, optionally, the electrode 103 includes a first electrode 1031 and a second electrode 1032 that are spaced apart, the first electrode 1031 and the second electrode 1032 are both located on a side of the light-emitting body 1021 close to the base substrate 101, the light-shielding layer 104 includes a first light-shielding layer 1041 and a second light-shielding layer 1042, along the thickness direction of the display panel 100, the first light-shielding layer 1041 at least partially overlaps with the first electrode 1031, and the second light-shielding layer 1042 at least partially overlaps with the second electrode 1032 The first electrode 1031 includes a first surface 120 away from the substrate 101, the second electrode 1032 includes a second surface 121 away from the substrate 101, the first light shielding layer 1041 includes a third surface 122 close to the first surface 120, the second light shielding layer 1042 includes a fourth surface 123 close to the second surface 121, the distance between the first surface 120 and the third surface 122 is L1, and the distance between the second surface 121 and the fourth surface 123 is L2, wherein,

[0072] The same light emitting element 102 includes a first electrode 1031 and a second electrode 1032 that are spaced apart. Along the thickness direction of the display panel 100, the first electrode 1031 at least partially overlaps with the first light shielding layer 1041, and the second electrode 1032 at least partially overlaps with the second light shielding layer 1042, so that the first light shielding layer 1041 blocks the metal reflected light of the first electrode 1031, and the second light shielding layer 1042 blocks the metal reflected light of the second electrode 1032. The first surface 120 of the first electrode 1031 that is away from the substrate 101 and the first light shielding layer 1042 are aligned with each other. The distance L1 between the third surface 122 41 close to the first surface 120 is the same as or similar to the distance L2 between the second surface 121 of the second electrode 1032 away from the substrate 101 and the fourth surface 123 of the second shading layer 1042 close to the second surface, and the distance of the metal reflected light reaching the shading layer 104 is the same or similar, so that the adjustment effect of the first shading layer 1041 on the light reflected by the first electrode 1031 and the adjustment effect of the second shading layer 1042 on the light reflected by the second electrode 1032 are the same or similar, thereby ensuring the light-emitting effect of the light-emitting element 102.

[0073] Optionally, the light emitting element 102 includes a micro light emitting diode.

[0074] Among them, the light-emitting element 102 may include a micro light-emitting diode, which may be a Micro LED or a Mini LED. The micro light-emitting diode has a small size and high spatial integration, which facilitates the realization of a high-resolution display panel 100 and ensures that the display effect of the display panel 100 is good.

[0075] Based on the same inventive concept, an embodiment of the present invention further provides a display device. Fig.23 FIG. 1 is a schematic diagram of a display device provided by an embodiment of the present invention. Fig.23 As shown, the display device includes the display panel 100 in the above embodiment. The display device 200 includes the display panel 100 described in any embodiment of the present invention. Therefore, the display device 200 provided by the embodiment of the present invention has the corresponding beneficial effects of the display panel 100 provided by the embodiment of the present invention, which will not be repeated here. Exemplarily, the display device 200 can be an electronic device such as a mobile phone, a computer, a smart wearable device (for example, a smart watch), and a car display device, which is not limited in the embodiment of the present invention.

[0076] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, It is characterized in that include: substrate substrate; A light emitting element located on one side of the base substrate; an electrode located on one side of the light emitting element; A light shielding layer at least partially located on a side of the light emitting element away from the base substrate, wherein the light shielding layer at least partially overlaps with the electrode along a thickness direction of the display panel; The light emitting element comprises a side light emitting surface; The display panel further includes a driving circuit located in the base substrate; The light shielding layer covers the side light emitting surface, and the projection of the light shielding layer in the thickness direction of the display panel covers the projection of the driving circuit in the thickness direction of the display panel.

2. The display panel according to claim 1, It is characterized in that The light-emitting element further comprises a light-emitting body, the light-emitting body is electrically connected to the electrode and the electrode is located on one side of the light-emitting body; A step structure is provided in the light emitting body, and the step structure is located on a side of the light emitting body away from the base substrate. Along the thickness direction of the display panel, the light shielding layer at least partially overlaps with the step structure.

3. The display panel according to claim 2, It is characterized in that Along the thickness direction of the display panel, the light shielding layer covers the step structure.

4. The display panel according to claim 2, It is characterized in that Along the thickness direction of the display panel, the step structure covers the electrode.

5. The display panel according to claim 2, It is characterized in that Along the thickness direction of the display panel, the height H of the step structure satisfies H=M / m, wherein M is the total optical density of the light-shielding layer and M≥1.0; and m is the optical density within a unit thickness.

6. The display panel according to claim 1, It is characterized in that The electrodes include a first electrode and a second electrode that are spaced apart from each other; the light-emitting elements include a first light-emitting element and a second light-emitting element that are adjacently disposed, and the first light-emitting element and the second light-emitting element share the first electrode.

7. The display panel according to claim 2, It is characterized in that The electrodes include a first electrode and a second electrode that are spaced apart, the first electrode and the second electrode are both located on a side of the light-emitting body close to the base substrate, the light-shielding layer includes a first light-shielding layer and a second light-shielding layer, along a thickness direction of the display panel, the first light-shielding layer at least partially overlaps with the first electrode, and the second light-shielding layer at least partially overlaps with the second electrode; The first electrode includes a first surface away from the substrate, the second electrode includes a second surface away from the substrate, the first light shielding layer includes a third surface close to the first surface, the second light shielding layer includes a fourth surface close to the second surface, the distance between the first surface and the third surface is L1, and the distance between the second surface and the fourth surface is L2, wherein, ≤5%.

8. The display panel according to claim 1, It is characterized in that The light emitting element comprises a micro light emitting diode.

9. A display panel, It is characterized in that include: substrate substrate; A light emitting element located on one side of the base substrate; an electrode located on one side of the light emitting element; A light shielding layer at least partially located on a side of the light emitting element away from the base substrate, wherein the light shielding layer at least partially overlaps with the electrode along a thickness direction of the display panel; The light-emitting element further comprises a light-emitting body, the light-emitting body is electrically connected to the electrode and the electrode is located on one side of the light-emitting body; A step structure is provided in the light-emitting body, the step structure is located on a side of the light-emitting body away from the base substrate, and along the thickness direction of the display panel, the light-shielding layer at least partially overlaps with the step structure; Along the thickness direction of the display panel, the light shielding layer covers the step structure; The light-emitting body includes a light-emitting composite layer, and along a thickness direction of the display panel, the light-shielding layer at most partially overlaps with the light-emitting composite layer.

10. The display panel according to claim 9, It is characterized in that Along the thickness direction of the display panel, the light shielding layer and the light emitting composite layer do not overlap.

11. The display panel according to claim 9, It is characterized in that Along the thickness direction of the display panel, the light emitting composite layer at most partially overlaps with the electrode.

12. The display panel according to claim 9, It is characterized in that The electrode is located on a side of the light emitting body close to the base substrate; The light-emitting body includes a light-emitting composite layer and other film layers located on a side of the light-emitting composite layer away from the base substrate; the step structure is arranged in the other film layers.

13. The display panel according to claim 12, It is characterized in that The other film layers include a first semiconductor layer and a buffer layer which are stacked, the buffer layer is provided with the step structure, or the buffer layer and the first semiconductor layer are provided with the step structure.

14. The display panel according to claim 9, It is characterized in that The electrode is located on a side of the light emitting body away from the base substrate; The light-emitting body comprises a first semiconductor layer, a light-emitting composite layer, and a second semiconductor layer sequentially located on one side of the substrate, the step structure comprises a first sub-step structure, at least the second semiconductor layer and the light-emitting composite layer are provided with the first sub-step structure, and the first sub-step structure exposes a portion of the first semiconductor layer; The electrode comprises a first electrode, and the first electrode is electrically connected to the first semiconductor layer exposed by the first sub-step structure; The light shielding layer covers at least a portion of the first electrode.

15. The display panel according to claim 14, It is characterized in that The light emitting body further comprises a current spreading layer located on a side of the second semiconductor layer away from the substrate, and the current spreading layer is in contact with the second semiconductor layer; The step structure further includes a second sub-step structure, and the second sub-step structure is provided at least in the current spreading layer; The electrode further includes a second electrode, the second electrode is electrically connected to the current spreading layer and covers the second sub-step structure; the light shielding layer covers at least a portion of the second electrode.

16. The display panel according to claim 9, It is characterized in that The electrode includes a binding electrode and a light-emitting element electrode, the binding electrode is located on the side of the light-emitting element electrode facing the base substrate, the binding electrode is at least partially in contact with the light-emitting element electrode, along the thickness direction of the display panel, the binding electrode covers the light-emitting element electrode, and the projection area of ​​the binding electrode on the base substrate is larger than the projection area of ​​the light-emitting element electrode on the base substrate; the light-shielding layer covers the binding electrode.

17. The display panel according to claim 16, It is characterized in that Along the thickness direction perpendicular to the display panel, the shading layer includes a first edge close to the light-emitting composite layer, the light-emitting composite layer includes a second edge close to the shading layer, the binding electrode includes a third edge close to the light-emitting composite layer, and the light-emitting element electrode includes a fourth edge close to the light-emitting composite layer; along the thickness direction of the display panel, the projection of the first edge is located between the projection of the third edge and the projection of the second edge, and the projection of the third edge is located between the projection of the first edge and the projection of the fourth edge.

18. A display device, It is characterized in that A display panel comprising any one of claims 1-17.

Images