Display panel, preparation method and display device

Abstract

The invention discloses a display panel, a preparation method and a display device, relates to the technical field of display, and can prolong the service life of the display panel. The display panel comprises a light-emitting backboard and a light conversion layer. The light conversion layer is arranged on the light-emitting side of the light-emitting back plate; the light conversion layer comprises a first hollowed-out part, and a light shading structure is arranged in the first hollowed-out part; the light conversion layer comprises a plurality of light conversion units, different light conversion units are used for emitting light of different colors, and the light conversion units are located between the adjacent first hollowed-out parts. The preparation method of the display panel comprises the following steps: arranging a light-emitting back plate; a light conversion layer is arranged on the light-emitting side of the light-emitting back plate, first hollowed-out parts are arranged on the light conversion layer, the light conversion layer comprises a plurality of light conversion units, the different light conversion units are used for emitting light of different colors, and the light conversion units are located between the adjacent first hollowed-out parts. And a shading structure is arranged in the first hollowed-out part.

Description

Technical Field

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

[0002] At present, the conventional organic light-emitting diode (OLED) light-emitting functional layer is prepared by vacuum evaporation deposition technology, but it is limited by the low aperture ratio of FMM (Fine Metal Mask) and low resolution, so the product display effect is poor and the service life is also short.

[0003] In summary, how to improve the service life of OLED (organic light-emitting diode) display panels is an urgent problem to be solved. Summary of the invention

[0004] A display panel, a preparation method and a display device provided in the embodiments of the present application can increase the service life of the display panel.

[0005] According to a first aspect of an embodiment of the present application, a display panel is provided, comprising:

[0006] Light-emitting backplane and light conversion layer;

[0007] The light conversion layer is arranged on the light emitting side of the light emitting backplane;

[0008] The light conversion layer includes a first hollow, and a light shielding structure is arranged in the first hollow;

[0009] The light conversion layer includes a plurality of light conversion units, different light conversion units are used to emit light of different colors, and the light conversion units are located between adjacent first hollows.

[0010] In some embodiments, the light shielding structure surrounds the light conversion unit.

[0011] In some embodiments, the thickness of the light shielding structure is greater than or equal to the thickness of the light conversion unit, and the thickness direction is a direction perpendicular to the plane where the light conversion layer is located.

[0012] In some embodiments, the light-emitting backplane includes a driving substrate and a light-emitting device layer, the driving substrate includes a substrate layer and a driving layer, the driving layer is arranged between the substrate layer and the light-emitting device layer, the light-emitting device layer is arranged between the driving substrate and the light conversion layer, the light-emitting device layer includes a first electrode, a light-emitting layer, a pixel defining layer and a second electrode, the first electrode is electrically connected to the driving substrate, the first electrode is arranged between the driving substrate and the light-emitting layer, the light-emitting layer is arranged between the first electrode and the second electrode, the light-emitting layer includes a second hollow, the orthographic projection of the second hollow on the substrate layer overlaps with the orthographic projection of the first hollow on the substrate layer, the pixel defining layer is arranged in the second hollow, and the pixel defining layer covers at least a portion of the edge of the first electrode.

[0013] In some embodiments, the second electrode covers the light-emitting layer and the pixel defining layer, the pixel defining layer surrounds the light-emitting layer, and the light-emitting layers in different areas surrounded by the pixel defining layer are spaced apart from each other.

[0014] In some embodiments, the driving substrate includes a substrate layer and a driving layer, and the driving layer is disposed between the substrate layer and the light-emitting device layer;

[0015] The thickness of the pixel defining layer is greater than or equal to the thickness of the light emitting layer, and the thickness direction is a direction perpendicular to the plane where the substrate layer is located.

[0016] In some embodiments, the second electrode covers the light-emitting layer, the second electrode includes a third hollow, and the orthographic projection of the third hollow on the driving substrate covers the orthographic projection of the first hollow on the driving substrate;

[0017] The pixel definition layer partially surrounds the light emitting layer, and the light emitting layers in different areas surrounded by the pixel definition layer are connected to each other;

[0018] The orthographic projection of the pixel defining layer on the driving substrate partially surrounds the orthographic projection of the second electrode on the driving substrate, and the second electrodes in different areas partially surrounded by the pixel defining layer are connected to each other.

[0019] In some embodiments, the light-emitting layer includes a main body portion and a connecting portion, the pixel defining layer partially surrounds the main body portion, and the connecting portion is connected between different main body portions;

[0020] The size of the main body in the first direction is greater than the size of the connecting part in the first direction. The first direction intersects with the connecting direction. The connecting direction is the connecting direction of the two main bodies at both ends of the connecting part.

[0021] In some embodiments, the light-emitting layer includes a main body portion and a connecting portion, the pixel defining layer partially surrounds the main body portion, and the connecting portion is connected between different main body portions;

[0022] The plurality of main bodies are connected along the second direction via a plurality of connecting parts; and / or,

[0023] The plurality of main bodies are connected along a third direction via a plurality of connecting parts; and / or,

[0024] The plurality of main bodies are connected along a fourth direction via a plurality of connecting parts;

[0025] The second direction, the third direction and the fourth direction all intersect.

[0026] In some embodiments, the first hollowing out and / or the second hollowing out are prepared by a photolithography process.

[0027] According to a second aspect of an embodiment of the present application, a method for manufacturing a display panel is provided, comprising:

[0028] Setting up a light-emitting back panel;

[0029] A light conversion layer is provided on the light-emitting side of the light-emitting backplane.

[0030] A first hollow is provided on the light conversion layer, wherein the light conversion layer includes a plurality of light conversion units, different light conversion units are used to emit light of different colors, and the light conversion units are located between adjacent first hollows;

[0031] A light shielding structure is arranged in the first hollow.

[0032] In some embodiments, the step of providing a light-emitting backplane includes:

[0033] A driving layer is arranged on one side of the substrate layer to form a driving substrate;

[0034] A first electrode is arranged on a side of the driving layer away from the substrate layer, and the first electrode is electrically connected to the driving layer;

[0035] A light-emitting layer is arranged on a side of the first electrode away from the substrate layer;

[0036] Setting a second hollow on the light-emitting layer;

[0037] A pixel defining layer is disposed in the second hollow, wherein the pixel defining layer covers at least a portion of an edge of the first electrode;

[0038] A second electrode is disposed on a side of the light-emitting layer away from the first electrode to obtain a light-emitting device layer.

[0039] According to a third aspect of an embodiment of the present application, another method for preparing a display panel is provided, comprising:

[0040] A light-emitting backplane and a light-conversion substrate are respectively provided;

[0041] The light-emitting backplane and the light-conversion substrate are aligned and arranged, and the light-conversion substrate is located on the light-emitting side of the light-emitting backplane to obtain a display panel;

[0042] Wherein, providing a light conversion substrate comprises:

[0043] Setting a light conversion layer;

[0044] A first hollow is provided on the light conversion layer, wherein the light conversion layer includes a plurality of light conversion units, different light conversion units are used to emit light of different colors, and the light conversion units are located between adjacent first hollows;

[0045] A light shielding structure is arranged in the first hollow.

[0046] In some embodiments, the step of providing a light-emitting backplane includes:

[0047] A driving layer is arranged on one side of the substrate layer to form a driving substrate;

[0048] A first electrode is arranged on a side of the driving layer away from the substrate layer, and the first electrode is electrically connected to the driving layer;

[0049] A light-emitting layer is arranged on a side of the first electrode away from the substrate layer;

[0050] A second hollow is provided on the light-emitting layer, and a pixel defining layer is provided in the second hollow, wherein the pixel defining layer covers at least a portion of an edge of the first electrode;

[0051] A second electrode is arranged on a side of the light-emitting layer away from the first electrode to obtain a light-emitting backplane;

[0052] The side of the light-emitting backplane away from the substrate layer is used to mate with the light conversion substrate.

[0053] According to a fourth aspect of the embodiments of the present application, a display device is provided, including:

[0054] The display panel in any of the above technical solutions.

[0055] The beneficial effects of this application are:

[0056] The light emitted by the light-emitting backplane of the present application can be converted into light of other colors by the light conversion unit to realize the full-color display of the display panel. The first hollowing in the light conversion layer can be formed by a photolithography process. The first hollowing formed by the photolithography process can have a smaller lateral size, so that the spacing between adjacent pixels is smaller. After the spacing is reduced, the pixel area of ​​the display panel can be increased, thereby improving the resolution of the display panel. Furthermore, under the condition of the same brightness, since the present application has a smaller pixel spacing, it has a lower current density per unit area. The reduction in current density can slow down the aging speed of the pixels to increase the service life of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 A schematic partial structural diagram of a display panel provided in an embodiment of the present application;

[0058] Figure 2 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0059] Figure 3 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0060] Figure 4 A schematic partial structural diagram of a display panel provided in an embodiment of the present application;

[0061] Figure 5 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0062] Figure 6 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0063] Figure 7 A schematic partial structural diagram of a display device provided in an embodiment of the present application;

[0064] Figure 8 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0065] Fig. 9 A schematic diagram of brightness life of a display panel provided in an embodiment of the present application;

[0066] Fig.10 A schematic flow chart of a method for preparing a display panel provided in an embodiment of the present application;

[0067] Fig.11 A schematic flow chart of another method for preparing a display panel provided in an embodiment of the present application;

[0068] Fig.12 A schematic flow chart of another method for preparing a display panel provided in an embodiment of the present application;

[0069] Fig.13 A schematic flow chart of a method for preparing a display panel provided in an embodiment of the present application;

[0070] Fig.14 A schematic partial structural diagram of a display device provided in an embodiment of the present application.

[0071] The reference numerals in the figure represent respectively:

[0072] 100, light-emitting backplane; 200, driving substrate; 210, substrate layer; 220, driving layer; 300, light-emitting device layer; 310, first electrode; 320, light-emitting layer; 321, second hollow; 322, main body; 323, connecting part; 330, pixel defining layer; 340, second electrode; 341, third hollow; 400, light conversion layer; 410, first hollow; 420, shading structure; 430, light conversion unit; 500, display device; 510, display panel; 600, mask; A, first direction; B, second direction; C, third direction; D, fourth direction. DETAILED DESCRIPTION

[0073] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0074] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0075] Fine Metal Mask (FMM) mask is an indispensable material for display screen production. The organic film layer of small molecule OLED is deposited by evaporation. In order to form three different pixels of red, green and blue, the light-emitting layers corresponding to red, green and blue light need to be accurately deposited on the corresponding pixels. Unlike inorganic or metal film layers, OLED materials are very sensitive to water vapor and difficult to pattern through traditional photolithography processes. Therefore, in the current evaporation equipment of OLED mass production lines, RGB pixel light-emitting layers need to be deposited separately. However, the display panel prepared by the FMM process has a large gap between pixels, and the pixel density unit of the display panel is low. In order to ensure the display efficiency of the display panel, a larger voltage needs to be applied to each pixel to increase the display brightness, but at the same time it will cause the service life of the pixel to be reduced.

[0076] In view of this, a display panel, a preparation method and a display device provided in the embodiments of the present application can improve the service life of the display panel.

[0077] In the first aspect of this application, Figure 1 A schematic partial structural diagram of a display panel provided in an embodiment of the present application. Figure 1 , a display panel is provided, comprising: a light-emitting backplane 100 and a light conversion layer 400. The light conversion layer 400 is arranged on the light-emitting side of the light-emitting backplane 100, referring to Figure 1 The upper side of the light-emitting backplane 100 is the light-emitting side. The light conversion layer 400 includes a first hollow 410, a light shielding structure 420 is disposed in the first hollow 410, and the light conversion layer 400 includes a plurality of light conversion units 430, different light conversion units 430 can emit light of different colors, and the light conversion units 430 can be disposed between adjacent first hollows 410.

[0078] Exemplarily, the light-emitting backplane can emit light of a single color, and the light conversion unit of the light conversion layer can be a photoluminescent unit, so as to convert the color of the light emitted by the light-emitting backplane. For example, the light-emitting backplane emits blue light, and the blue light can be used as excitation light for the light conversion layer. The light conversion unit can convert the blue light into red light or green light. The blue light can also excite the light conversion unit to continue to emit blue light to achieve a full-color display effect.

[0079] In some examples, the light conversion layer can be directly or indirectly disposed on the light-emitting backplane. For example, the light conversion layer can be directly formed on the light-emitting side of the light-emitting backplane, or the light conversion layer can be formed on a light conversion substrate. The light conversion substrate and the light-emitting backplane can be aligned to dispose the light conversion layer on the light-emitting side of the light-emitting backplane.

[0080] Figure 2 A schematic partial structural diagram of another display panel provided in an embodiment of the present application. In some examples, reference Figure 2 The light conversion layer 400 can be photolithographically processed by a photolithography process, a light conversion unit 430 can be arranged in the photolithography area, and a first hollow 410 is formed for the light conversion unit 430, and then a shading structure 420 is formed in the first hollow 410. The shading structure 420 is used to block the light emitted from the light-emitting backplane 100 to avoid light crosstalk between adjacent light sources.

[0081] Exemplary, reference Figure 2 The light emitting device layer 300 in the light emitting backplane 100 may be prepared by using FMM technology. For example, the anode is disposed on the side of the driving substrate 200 away from the substrate layer 210. The anode may be Figure 2 As shown in the first electrode 310 in FIG. 1 , the pixel defining layer 330 covers part of the edge of the anode, a pixel opening is provided on the pixel defining layer 330, and the light-emitting layer 320 is provided in the pixel opening. The light-emitting layer 320 of red, green or blue pixel light can be prepared by an evaporation process, and the cathode is provided on the side of the light-emitting layer 320 away from the anode, and the cathode covers part of the light-emitting layer 320 and part of the pixel defining layer 330. The cathode can be as shown in FIG. Figure 2 As shown in the second electrode 340.

[0082] Exemplarily, the light conversion layer can be a photosensitive material, and the first hollowing can be prepared by a photolithography process. The photolithography process can first expose the light conversion layer to form a first development area. The orthographic projection shape of the first development area on the light conversion layer can be adjusted by a first mask plate, thereby achieving high resolution of the light conversion layer and improving the display clarity of the display panel.

[0083] Exemplarily, photoresist may be coated on the light conversion layer, and the photoresist may be exposed and developed using a photolithography mask to form a pattern on the photoresist, and then the light conversion layer may be etched using the photoresist pattern as a mask to form a first hollow on the light conversion layer.

[0084] The light emitted by the light-emitting backplane of the present application can be converted into light of other colors by the light conversion unit to realize the full-color display of the display panel. The first hollowing in the light conversion layer can be formed by a photolithography process. The first hollowing formed by the photolithography process can have a smaller lateral size, so that the spacing between adjacent pixels is smaller. After the spacing is reduced, the pixel area of ​​the display panel can be increased, thereby improving the resolution of the display panel. Furthermore, under the condition of the same brightness, since the present application has a smaller pixel spacing, it has a lower current density per unit area. The reduction in current density can slow down the aging speed of the pixels to increase the service life of the display panel.

[0085] In some examples, the shading structure surrounds the light conversion unit. The shading structure can be arranged in a grid shape, that is, the shape of the first hollowing can be grid-shaped, and the light conversion layer can be defined as a plurality of independent partitions, each of which can be used as a light conversion unit to obtain sub-pixel areas of different colors.

[0086] Exemplarily, the light conversion unit may include a photoluminescent material, such as a quantum dot material.

[0087] In some examples, the light conversion unit is used to convert light. The light conversion unit and the first hollow area are not set in the light conversion layer to ensure that the blue light emitted from the light-emitting backplane passes directly. The position setting of the light-emitting shading structure as a blue sub-pixel can avoid crosstalk between light emitted by adjacent light conversion units, such as crosstalk between red light and green light, or avoid crosstalk between the light conversion unit and the adjacent light conversion layer, such as crosstalk between green light and blue light.

[0088] In some examples, the thickness of the light shielding structure is greater than or equal to the thickness of the light conversion unit, and the thickness direction is a direction perpendicular to the plane where the light conversion layer is located.

[0089] For example, by using a photolithography process, a light conversion unit and a first hollow can be formed in the light conversion layer through multiple masks, thereby increasing the number of light emitting units and increasing the pixel density unit (Pixels Per Inch, PPI) of the display panel of the present application. Part of the shading structure can be set in the first hollow, and part of the shading structure covers part of the surface of the light conversion unit to avoid crosstalk between light.

[0090] Exemplarily, the light conversion units emitting light of different colors can be prepared by using different mask plates, and the first hollowing between adjacent light conversion units can be prepared by using the same process.

[0091] Figure 3 A schematic partial structural diagram of another display panel provided in an embodiment of the present application. In some examples, reference Figure 3 The light-emitting backplane 100 includes a driving substrate 200 and a light-emitting device layer 300 . The driving substrate 200 includes a substrate layer 210 and a driving layer 220 . The driving layer 220 is arranged between the substrate layer 210 and the light-emitting device layer 300 . The light-emitting device layer 300 is arranged between the driving substrate 200 and the light conversion layer 400 .

[0092] Exemplarily, the substrate layer may include a flexible substrate or a hard substrate, the flexible substrate may include polyimide, and the hard substrate may be made of transparent glass.

[0093] Exemplarily, a pixel driving circuit is provided in the driving layer, and the pixel driving circuit can be electrically connected to the light-emitting device layer to drive the light-emitting device layer to emit light, and the light passes through the light conversion layer and then is emitted to the display area to realize the display function of the display panel.

[0094] In some examples, the light-emitting device layer includes a first electrode, a light-emitting layer, a pixel defining layer and a second electrode, the first electrode is electrically connected to the driving substrate, the first electrode is arranged between the driving substrate and the light-emitting layer, and the light-emitting layer is arranged between the first electrode and the second electrode.

[0095] Exemplarily, the first electrode may be an anode, and the second electrode may be a cathode.

[0096] Exemplarily, the pixel definition layer can be used to define pixel boundaries, thereby avoiding color mixing between pixels and improving display effects.

[0097] Exemplarily, the pixel defining layer may include a pixel opening, which may be prepared by a photolithography process, and the light emitting layer may be disposed in the pixel opening. The photolithography process may increase the pixel opening ratio, thereby increasing the resolution of the display panel.

[0098] Exemplary, reference Figure 3 The first electrode 310 can be electrically connected to the pixel driving circuit in the driving substrate 200. The pixel driving circuit can include a 2T1C circuit structure, a 7T1C circuit structure, an 8T1C circuit structure or a 9T1C circuit structure. 2T1C is a circuit structure of two thin film transistors (TFT) and one capacitor. Similarly, 7T1C is a circuit structure of seven TFTs and one capacitor, and so on.

[0099] In some examples, reference Figure 3 , the light-emitting layer 320 includes a second hollow 321, the orthographic projection of the second hollow 321 on the substrate layer 210 overlaps with the orthographic projection of the first hollow 410 on the substrate layer 210, and the pixel defining layer 330 is disposed in the second hollow 321, and the pixel defining layer 330 covers at least part of the edge of the first electrode 310, that is, the second hollow 321 is disposed in a region corresponding to the first hollow 410. After the pixel defining layer 330 is filled in the second hollow 321, the space formed between adjacent pixel defining layers 330 can be a pixel opening, and the pixel opening contains the light-emitting layer 320, and the order of formation can be the light-emitting layer 320 first, and then the pixel opening.

[0100] Exemplarily, the second hollowing may be prepared by a photolithography process. The second hollowing formed by the photolithography process may have a smaller lateral dimension, so that the spacing between adjacent pixels is smaller. After the spacing is reduced, the pixel area of ​​the display panel can be increased, thereby improving the resolution of the display panel. Furthermore, under the same brightness, since the present application has a smaller pixel spacing, it has a lower current density per unit area. The reduced current density can slow down the aging speed of the pixels to increase the service life of the display panel.

[0101] Exemplarily, the light emitting layer in the area between adjacent second hollows can emit light, and the pixel defining layer corresponding to the second hollows can avoid crosstalk between adjacent light. The first hollow in the light conversion layer can correspond to the second hollow in the light emitting device layer, that is, the light shielding structure corresponds to the pixel defining layer.

[0102] In some examples, a second hollowing is formed on the light-emitting backplane using a photolithography process, so that the opening ratio of the display panel can be increased to 60%, the life span is increased by 3.5 times, the pixel density unit (Pixels Per Inch, PPI) of the light conversion layer can reach 1300, and the display clarity is increased by 3.0 times.

[0103] Exemplarily, a light-emitting backplane with a second hollow portion formed by a photolithography process can avoid the occurrence of an illumination shadow area (diffraction area at the edge) formed due to the large spacing between light-emitting layers during the evaporation process of the light-emitting device layer prepared by the FMM technology. It can also avoid color mixing between adjacent pixels, thereby improving the display effect of the display panel of the present application.

[0104] In some examples, the thickness of the pixel defining layer is greater than or equal to the thickness of the light emitting layer, and the thickness direction is a direction perpendicular to the plane where the substrate layer is located.

[0105] Exemplarily, the pixel defining layer may be injected into the second hollow through inkjet printing technology, a portion of the pixel defining layer may be formed in the second hollow, and a portion of the pixel defining layer may cover the first electrode.

[0106] In some examples, the second electrode covers the light-emitting layer and the pixel defining layer, the pixel defining layer surrounds the light-emitting layer, the light-emitting layers in different regions surrounded by the pixel defining layer are spaced apart from each other, and the light-emitting layers in different regions are spaced apart by the pixel defining layer.

[0107] Exemplarily, the pixel defining layer surrounds the light emitting layer to avoid crosstalk between adjacent light rays, and the second electrode covers the light emitting layer to dispose the light emitting layer between the first electrode and the second electrode, so that the light emitting layer emits light.

[0108] In some examples, reference Figure 3The first electrode 310, the light-emitting layer 320, and the second electrode 340 may be a stacked structure, so as to form the second hollow 321 by using a photolithography process.

[0109] Exemplarily, the light emitting side of the above-mentioned light-emitting backplane is the side of the second electrode away from the light-emitting layer, and other film layers, such as a planar layer, may be arranged between the second electrode and the light conversion layer, which will not be described in detail in this application.

[0110] In some examples, the pixel defining layer partially surrounds the light emitting layer, and light emitting layers in different regions partially surrounded by the pixel defining layer are connected to each other.

[0111] Exemplarily, the light-emitting layer may be patterned, and the pixel defining layer is disposed in a peripheral area of ​​the light-emitting layer.

[0112] In some examples, orthographic projections of adjacent light emitting layers on the substrate layer do not overlap.

[0113] For example, by using a photolithography process, the common layer in the light-emitting device layer can be cut off so that the area corresponding to the light-emitting layer forms an independent light-emitting unit to serve as an independent display unit, that is, as a light-emitting sub-pixel, thereby avoiding color crosstalk when the display panel displays at low brightness.

[0114] Figure 4 A schematic partial structural diagram of a display panel provided in an embodiment of the present application. In some examples, reference Figure 4 The light-emitting layer 320 includes a main body 322 and a connecting part 323. The pixel defining layer 330 partially surrounds the main body 322. The connecting part 323 is connected between different main body parts 322. The size of the main body 322 in the first direction A is larger than the size of the connecting part 323 in the first direction A. The first direction A intersects with the connecting direction. The connecting direction is the connection direction between the two main body parts 322 at both ends of the connecting part 323. In the process of forming the second hollow 321, the light-emitting layer 320 and the second electrode 340 can be sequentially arranged, and then the second electrode 340 and the light-emitting layer 320 are sequentially etched to obtain the second hollow 321, so that the second electrode 340 is a patterned electrode structure.

[0115] Exemplarily, the main body is used to emit light, and the connecting part is used to connect adjacent main body parts to avoid the phenomenon of no display abnormality caused by disconnection between pixels after the second electrode is patterned due to the photolithography process. Multiple main body parts can be arranged in an array, for example, multiple main body parts are arranged along the row direction and column direction of the array direction, the row direction can be the connection direction, and the column direction can be the first direction. The second electrode is provided with a main body part and a connecting part, so that the second electrode is a common driving electrode.

[0116] Figure 5A schematic partial structural diagram of another display panel provided in an embodiment of the present application. In some examples, reference Figure 5 The pixel defining layer 330 partially surrounds the main body 322 , the connecting portion 323 is connected between different main body portions 322 , and the multiple main body portions 322 are connected along the second direction B through the multiple connecting portions 323 .

[0117] In some examples, reference Figure 5 , multiple main body parts 322 are connected along the third direction C through multiple connecting parts 323.

[0118] In some examples, reference Figure 5 , the multiple main body parts 322 are connected along the fourth direction D through the multiple connecting parts 323.

[0119] In some examples, reference Figure 5 , the second direction B, the third direction C and the fourth direction D all intersect.

[0120] Exemplarily, the first direction may be the connection direction of the connecting part, the connection direction between the multiple main parts may be the first direction, the second direction, the third direction, the fourth direction or other directions, the connection direction may be a row direction, a column direction or an inclined direction, for example, the multiple connecting parts may be arranged in a "M" shape.

[0121] It should be noted that, in one display panel, only connection portions arranged along the first direction may be provided.

[0122] Exemplarily, the display panel may be provided with connection portions arranged along the first direction and the second direction.

[0123] Exemplarily, the display panel may be provided with connection portions arranged along the first direction and the third direction.

[0124] Exemplarily, the display panel may be provided with connection portions arranged along the first direction and the fourth direction.

[0125] Exemplarily, the display panel may be provided with connection portions arranged along the second direction and the third direction.

[0126] Exemplarily, the display panel may be provided with connection portions arranged along the second direction and the fourth direction.

[0127] Exemplarily, the display panel may be provided with connection portions arranged along the third direction and the fourth direction.

[0128] Exemplarily, the display panel may be provided with connection portions arranged along the first direction, the second direction and the third direction.

[0129] Exemplarily, the display panel may be provided with connection portions arranged along the first direction, the second direction, and the fourth direction.

[0130] Exemplarily, the display panel may be provided with connection portions arranged along the first direction, the third direction, and the fourth direction.

[0131] Exemplarily, the display panel may be provided with connection portions arranged along the second direction, the third direction, and the fourth direction.

[0132] Exemplarily, the display panel may be provided with connection portions arranged along the first direction, the second direction, the third direction and the fourth direction.

[0133] In some examples, the second electrode covers a surface of the pixel defining layer on a side away from the driving substrate.

[0134] Exemplarily, the light emitting layer may be photolithographically developed using a photolithography process, and then the second electrode and the remaining film layers may be formed, so that the second electrode covers the pixel defining layer.

[0135] In some examples, the orthographic projection of the pixel defining layer on the driving substrate partially surrounds the orthographic projection of the second electrode on the driving substrate, and the second electrodes in different regions partially surrounded by the pixel defining layer are connected to each other.

[0136] Exemplarily, the light emitting layer and the second electrode may be simultaneously photolithographically processed using the same mask to form a second hollow, and then a pixel defining layer may be formed in the second hollow, thereby saving process steps and reducing process costs.

[0137] In some examples, a height of a side of the pixel defining layer away from the substrate layer may be greater than or equal to a height of a side of the light emitting layer away from the substrate layer.

[0138] Figure 6 A schematic partial structural diagram of another display panel provided in an embodiment of the present application. In some examples, reference Figure 6 The second electrode 340 covers the light emitting layer 320 , and the second electrode 340 includes a third hollow 341 , and the orthographic projection of the third hollow 341 on the driving substrate 200 covers the orthographic projection of the first hollow 410 on the driving substrate 200 .

[0139] Exemplarily, the third hollowing may be prepared by a photolithography process, and the second electrode and the light-emitting layer may be patterned separately by using different masks to improve the design freedom of the display panel of the present application.

[0140] Figure 7 A schematic partial structural diagram of a display device 500 provided in an embodiment of the present application, in some examples, the shape of the orthographic projection of the light emitting layer 320 on the substrate layer 210 can be circular, that is, the shape of the sub-pixel can be circular.

[0141] In some examples, the shape of the orthographic projection of the light emitting layer on the substrate layer may be a polygon, that is, the shape of the sub-pixel may be a polygon.

[0142] Figure 8 A schematic partial structural diagram of another display panel provided in an embodiment of the present application. In some examples, the shape of the orthographic projection of the light emitting layer 320 on the substrate layer 210 can be circular or polygonal.

[0143] Exemplarily, using the photolithography process, the pattern setting of the light emitting device layer has a higher degree of freedom.

[0144] In some examples, by controlling the fineness of the developing template, the number of light conversion units can be increased, thereby increasing the PPI of the display panel of the present application and achieving high-resolution display.

[0145] Fig. 9 A schematic diagram of the brightness life of a display panel provided in an embodiment of the present application. In some examples, reference Fig. 9 , Fig. 9 The horizontal axis is time, in hours (hrs), and the horizontal axis is brightness decay, in %. The display panel prepared by the photolithography process in the present application has a slower brightness decay, so that the aperture ratio of the pixel display area in the light-emitting backplane 100 can be increased to a maximum of 60%, the OLED display life is increased by 3.5 times, and the PPI of the display panel is increased by 3.0 times, so that the display effect of the display panel is better.

[0146] In the second aspect of this application, Fig.10 A schematic flow chart of a method for preparing a display panel provided in an embodiment of the present application. Fig.10 , a method for preparing a display panel is provided. The method for preparing a display panel comprises:

[0147] S100: Setting a light-emitting back panel.

[0148] Exemplarily, the light-emitting backplane can emit light of a single color.

[0149] S200: Arranging a light conversion layer on the light emitting side of the light emitting backplane.

[0150] Exemplarily, the light conversion layer may be stacked on the light emitting side of the light emitting backplane, or connected to the light emitting backplane by an alignment method.

[0151] S300: setting a first hollow on the light conversion layer, the light conversion layer includes a plurality of light conversion units, different light conversion units can emit light of different colors, and the light conversion units are located between adjacent first hollows.

[0152] Exemplarily, the light conversion unit may include a photoluminescent material. The light conversion unit including the photoluminescent material may convert the light emitted by the light-emitting backplane into light of other colors to achieve full-color display of the display panel.

[0153] Exemplarily, the light conversion unit can convert the light emitted from the light-emitting backplane into light of other colors, and the light conversion layer can maintain the color of the light emitted from the light-emitting backplane.

[0154] S400: Disposing a light-shielding structure in the first hollow.

[0155] Exemplarily, the light shielding structure can avoid the crosstalk between adjacent light rays.

[0156] Exemplary, reference Fig.10 , a light-emitting backplane 100 can be set first, and then a light conversion layer 400 is formed on the light-emitting side of the light-emitting backplane 100, a photolithography area is formed by a photolithography process, and a light conversion unit is set in the photolithography area. The light conversion unit can adjust the light emitted by the light-emitting backplane 100 to emit light of different colors.

[0157] Fig.11 A schematic flow chart of another method for preparing a display panel provided in an embodiment of the present application. In some examples, reference Fig.11 , the steps of setting the light-emitting backplane include:

[0158] S110: Disposing a driving layer on one side of the substrate layer to form a driving substrate.

[0159] Exemplarily, a driving layer is disposed on the substrate layer to form a driving substrate.

[0160] S120: Disposing a first electrode at some portion of the driving layer away from the substrate layer, wherein the first electrode is electrically connected to the driving layer.

[0161] Exemplarily, the first electrode is electrically connected to a pixel driving circuit of the driving layer to control the brightness of the pixel.

[0162] S130: disposing a light-emitting layer on a side of the first electrode away from the substrate layer;

[0163] Exemplarily, the light-emitting layer may be stacked on the first electrode, that is, the first electrode and the light-emitting layer may be provided as a whole layer.

[0164] S140: Setting a second hollowing out on the light emitting layer.

[0165] Exemplarily, a second hollowing is formed on the light-emitting layer using a photolithography process. The second hollowing formed using the photolithography process can have a smaller lateral size, so that the spacing between adjacent pixels is smaller. After the spacing is reduced, the pixel area of ​​the display panel can be increased, thereby improving the resolution of the display panel. Furthermore, under the same brightness, since the present application has a smaller pixel spacing, it has a lower current density per unit area. The reduced current density can slow down the aging speed of the pixels, thereby increasing the service life of the display panel.

[0166] S150: Disposing a pixel defining layer in the second hollow, wherein the pixel defining layer covers at least a portion of an edge of the first electrode.

[0167] Exemplarily, the height of the pixel defining layer away from the substrate layer is greater than or equal to the height of the light emitting layer away from the substrate layer, so as to shield the light emitted by the adjacent light emitting layer and avoid light crosstalk.

[0168] S160 : Disposing a second electrode on a side of the light-emitting layer away from the first electrode to obtain a light-emitting device layer 300 .

[0169] Exemplarily, the first electrode may be an anode, the second electrode may be a cathode, the light-emitting layer is disposed between the first electrode and the second electrode, and a voltage is applied between the first electrode and the second electrode to drive the light-emitting layer to emit light.

[0170] Exemplarily, a second hollow is formed on the light-emitting layer by using a photolithography process, and a pixel defining layer is formed in the second hollow by using an inkjet printing process. Alternatively, a first electrode, a light-emitting layer, and a second electrode are sequentially stacked on the driving substrate, and a second hollow is formed on the light-emitting layer by using a photolithography process and using the same mask, and a third hollow is formed on the second electrode, and a pixel defining layer is formed in the second hollow and the third hollow by using an inkjet printing process.

[0171] In some examples, the shape of the orthographic projection of the light emitting layer on the substrate layer may be circular, elliptical, or polygonal.

[0172] In some examples, the light-emitting layer includes a main body and a connecting part, the pixel defining layer partially surrounds the main body, and the connecting part connects different main bodies. The size of the main body in the first direction is larger than the size of the connecting part in the first direction, the first direction intersects with the connecting direction, and the connecting direction is the direction of the line between the two main bodies at both ends of the connecting part.

[0173] In some examples, the pixel defining layer partially surrounds the main body portion, the connecting portion connects different main body portions, and the multiple main body portions are connected along the second direction, the third direction, or the fourth direction through the multiple connecting portions.

[0174] The third aspect of this application is Fig.12A schematic flow chart of another method for preparing a display panel provided in an embodiment of the present application. Fig.12 , a method for preparing a display panel is provided. The method for preparing a display panel comprises:

[0175] S500: respectively setting a light-emitting backplane and a light-conversion substrate.

[0176] Exemplarily, corresponding film layers or structures may be disposed on the two substrates to form a light-emitting backplane and a light-conversion substrate, respectively.

[0177] S600: Aligning the light-emitting backplane and the light-conversion substrate, and arranging the light-conversion substrate on the light-emitting side of the light-emitting backplane to obtain a display panel.

[0178] Exemplarily, the light-emitting backplane and the light-conversion substrate are connected in a mating manner, the light-emitting backplane can emit light, and the light-conversion substrate can adjust the light emitted by the light-emitting backplane to achieve full-color display of the display panel.

[0179] Exemplarily, the light-emitting backplane and the light-conversion substrate may be prepared by photolithography processes respectively, and the light-emitting backplane and the light-conversion substrate are combined to form a display panel.

[0180] In some examples, the step of providing a light conversion substrate includes:

[0181] S511: Setting a light conversion layer.

[0182] Exemplarily, the light conversion layer may be disposed on one side of the light conversion substrate.

[0183] S512: Setting a first hollowing out on the light conversion layer.

[0184] Exemplarily, a first hollow may be formed on the light conversion layer by using a photolithography process, and the first hollow may penetrate the light conversion layer.

[0185] Exemplarily, the light conversion layer includes a plurality of light conversion units, different light conversion units can emit light of different colors, and the light conversion units can be arranged between adjacent first hollows.

[0186] S513: Disposing a light-shielding structure in the first hollow.

[0187] Exemplarily, the light shielding structure can avoid crosstalk between adjacent light rays.

[0188] Exemplarily, the light shielding structure may be disposed between the light conversion layer and the light conversion unit. The light conversion layer may be exposed and developed first, and then the light conversion unit may be disposed, and then the light conversion unit may be photolithographically processed to form the first hollowing.

[0189] Exemplarily, the light conversion unit can convert the light emitted from the light-emitting backplane into light of other colors, and the light conversion layer can maintain the color of the light emitted from the light-emitting backplane.

[0190] Fig.13 A schematic flow chart of a method for preparing a display panel provided in an embodiment of the present application.

[0191] refer to Fig.13 In some examples, the step of providing a light-emitting backplane includes:

[0192] S521 : Disposing a driving layer on some of the substrate layers to form a driving substrate 200 .

[0193] Exemplarily, a driving layer is disposed on the substrate layer to form a driving substrate.

[0194] S522: Disposing a first electrode on a side of the driving layer away from the substrate layer, wherein the first electrode is electrically connected to the driving layer.

[0195] Exemplarily, the first electrode is electrically connected to a pixel driving circuit of the driving layer to control the brightness of the pixel.

[0196] S523: Disposing a light-emitting layer at some portion of the first electrode away from the substrate layer.

[0197] Exemplarily, the light-emitting layer may be stacked on the first electrode, that is, the first electrode and the light-emitting layer may be provided as a whole layer.

[0198] S524: Disposing a second hollow on the light-emitting layer, and disposing a pixel defining layer in the second hollow, wherein the pixel defining layer covers at least a portion of an edge of the first electrode.

[0199] Exemplarily, the second hollowing in the light conversion layer can be formed by a photolithography process. The second hollowing formed by the photolithography process can have a smaller lateral size, so that the spacing between adjacent pixels is smaller. After the spacing is reduced, the pixel area of ​​the display panel can be increased, thereby improving the resolution of the display panel. Furthermore, under the same brightness, since the present application has a smaller pixel spacing, it has a lower current density per unit area. The reduced current density can slow down the aging speed of the pixels to increase the service life of the display panel.

[0200] S525: Disposing a second electrode on a side of the light-emitting layer away from the first electrode to form a light-emitting device layer 300, thereby obtaining a light-emitting backplane.

[0201] Exemplarily, the first electrode may be an anode, the second electrode may be a cathode, the light-emitting layer is disposed between the first electrode and the second electrode, and a voltage is applied between the first electrode and the second electrode to drive the light-emitting layer to emit light.

[0202] Exemplary, reference Fig.13 A second hollow is formed on the light-emitting layer using a photolithography process. The photolithography process can reduce the distance between adjacent light-emitting layers, thereby increasing the light-emitting layer area for emitting light in the display panel, that is, the display area, to improve the display effect of the display panel.

[0203] In some examples, in the photolithography process, a hydrophobic protective layer, a water-soluble shielding layer, a first anti-reflective coating, a photoresist, and a second anti-reflective coating are sequentially provided on the side of the light-emitting layer away from the substrate layer, and the photoresist is developed and exposed by a photolithography device.

[0204] Exemplarily, the second anti-reflective coating can control the reflection of the photoresist surface by optical destructive interference, and the first anti-reflective coating can eliminate the reflected light at the bottom interface of the photoresist, eliminating the standing wave effect and multiple exposure caused by the interference between the reflected light of the photoresist and the refracted light of the lens.

[0205] For example, the water-soluble shielding layer can prevent the photoresist from contacting the organic layer, which may result in the photoresist remaining in the device. The water-transporting protective layer can protect the organic layer and prevent the organic layer from being invaded by water.

[0206] In some examples, a lithography apparatus may include a light source, a laser beam splitter, an interferometer, a mask, and a lens. The laser beam splitter is disposed between the light source and the interferometer to split the light source into multiple light beams. After the multiple light beams pass through the interferometer, an interference enhancement effect is generated to increase exposure energy, enhance exposure effect, and avoid the phenomenon of insufficient exposure of the photoresist to produce a foot-shaped pattern.

[0207] In some examples, the number of light beams is greater than or equal to 2, the light source may be I line (365nm), H line (405nm), G line (436nm), KrF excimer laser (248nm), ArF excimer laser (193nm), the organic layer of the light-emitting backplane may be a single-layer or multi-layer stacked structure, for example, the organic layer may include a hole transport layer or a hole injection layer and a hole transport layer, the hydrophobic protective layer may be a hydrophobic organic layer or a hydrophobic organic semiconductor layer, the photoresist may be a chemically amplified photoresist, and the water-soluble shielding layer may be a non-cross-linked water-based polymer material.

[0208] In some examples, a side of the light-emitting backplane away from the substrate layer can be connected to the light-conversion substrate by a mating manner.

[0209] Exemplarily, the pixel defining layer can correspond to the shading structure through the direction of alignment, and the light emitted from the light emitting layer is emitted to the light conversion layer and the light conversion unit. For example, the light emitted from the light emitting layer can continue to emit with the original color after passing through the light conversion layer, and the light emitted from the light emitting layer can emit light of different colors after passing through the light conversion unit.

[0210] In some examples, the shape of the orthographic projection of the light emitting layer on the substrate layer may be circular, elliptical, or polygonal.

[0211] In some examples, the light-emitting layer includes a main body and a connecting part, the pixel defining layer partially surrounds the main body, and the connecting part connects different main bodies. The size of the main body in the first direction is larger than the size of the connecting part in the first direction, the first direction intersects with the connecting direction, and the connecting direction is the direction of the line between the two main bodies at both ends of the connecting part.

[0212] In some examples, the pixel defining layer partially surrounds the main body portion, the connecting portion connects different main body portions, and the multiple main body portions are connected along the second direction, the third direction, or the fourth direction through the multiple connecting portions.

[0213] The fourth aspect of this application is: Fig.14 A schematic partial structural diagram of a display device provided in an embodiment of the present application. Fig.14 , a display device is provided. The display device 500 comprises: a display panel 510 in any of the above technical solutions.

[0214] The display device provided in the embodiment of the present application may include a television, a computer, a smart phone, a smart wearable device, a laptop computer, a tablet computer, etc. The smart wearable device may include a smart watch, an AR (augmented reality) device, a VR (virtual reality) device, etc.

[0215] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0216] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0217] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0218] Obviously, those skilled in the art can make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalents, this specification is also intended to include these modifications and variations.

Claims

1. A display panel, characterized in that: include: Light-emitting backplane and light conversion layer; The light conversion layer is arranged on the light emitting side of the light emitting backplane; The light conversion layer includes a first hollow, and a light shielding structure is arranged in the first hollow; The light conversion layer includes a plurality of light conversion units, different light conversion units are used to emit light of different colors, and the light conversion units are located between adjacent first hollows.

2. The display panel according to claim 1, characterized in that: The light shielding structure surrounds the light conversion unit.

3. The display panel according to claim 1 or 2, characterized in that: The thickness of the light-shielding structure is greater than or equal to the thickness of the light conversion unit, and the thickness direction is a direction perpendicular to the plane where the light conversion layer is located.

4. The display panel according to claim 1, characterized in that: The light-emitting backplane includes a driving substrate and a light-emitting device layer, the driving substrate includes a substrate layer and a driving layer, the driving layer is arranged between the substrate layer and the light-emitting device layer, the light-emitting device layer is arranged between the driving substrate and the light-conversion layer, the light-emitting device layer includes a first electrode, a light-emitting layer, a pixel defining layer and a second electrode, the first electrode is electrically connected to the driving substrate, the first electrode is arranged between the driving substrate and the light-emitting layer, the light-emitting layer is arranged between the first electrode and the second electrode, the light-emitting layer includes a second hollow, the orthographic projection of the second hollow on the substrate layer overlaps with the orthographic projection of the first hollow on the substrate layer, the pixel defining layer is arranged in the second hollow, and the pixel defining layer covers at least part of the edge of the first electrode.

5. The display panel according to claim 4, characterized in that: The second electrode covers the light-emitting layer and the pixel defining layer. The pixel defining layer surrounds the light-emitting layer. The light-emitting layers in different areas surrounded by the pixel defining layer are spaced apart from each other.

6. The display panel according to claim 4, characterized in that: The driving substrate comprises a substrate layer and a driving layer, wherein the driving layer is arranged between the substrate layer and the light emitting device layer; The thickness of the pixel defining layer is greater than or equal to the thickness of the light emitting layer, and the thickness direction is a direction perpendicular to the plane where the substrate layer is located.

7. The display panel according to claim 6, characterized in that: The second electrode covers the light-emitting layer, the second electrode includes a third hollow, and the orthographic projection of the third hollow on the driving substrate covers the orthographic projection of the first hollow on the driving substrate; The pixel defining layer partially surrounds the light emitting layer, and the light emitting layers in different areas partially surrounded by the pixel defining layer are connected to each other; The orthographic projection of the pixel defining layer on the driving substrate partially surrounds the orthographic projection of the second electrode on the driving substrate, and the second electrodes in different areas partially surrounded by the pixel defining layer are connected to each other.

8. The display panel according to claim 4, characterized in that: The light emitting layer comprises a main body portion and a connecting portion, the pixel defining layer partially surrounds the main body portion, and the connecting portion is connected between different main body portions; The size of the main body in the first direction is greater than the size of the connecting part in the first direction. The first direction intersects with the connecting direction. The connecting direction is the connecting direction of the two main bodies at both ends of the connecting part.

9. The display panel according to claim 4, characterized in that: The light emitting layer comprises a main body portion and a connecting portion, the pixel defining layer partially surrounds the main body portion, and the connecting portion is connected between different main body portions; The plurality of main bodies are connected along the second direction via the plurality of connecting parts; and / or, The plurality of main bodies are connected along a third direction via the plurality of connecting parts; and / or, The plurality of main bodies are connected along a fourth direction via the plurality of connecting parts; The second direction, the third direction and the fourth direction all intersect.

10. The display panel according to claim 4, characterized in that: The first hollowing out and / or the second hollowing out are / is produced by a photolithography process.

11. A method for preparing a display panel, characterized in that: include: Setting up a light-emitting back panel; A light conversion layer is arranged on the light emitting side of the light emitting backplane, A first hollow is provided on the light conversion layer, wherein the light conversion layer comprises a plurality of light conversion units, different light conversion units are used to emit light of different colors, and the light conversion units are located between adjacent first hollows; A light shielding structure is disposed in the first hollow.

12. The preparation method according to claim 11, characterized in that: The step of setting the light-emitting backplane comprises: A driving layer is arranged on one side of the substrate layer to form a driving substrate; A first electrode is disposed on a side of the driving layer away from the substrate layer, wherein the first electrode is electrically connected to the driving layer; A light-emitting layer is disposed on a side of the first electrode away from the substrate layer; Disposing a second hollow on the light-emitting layer; Disposing a pixel defining layer in the second hollow, wherein the pixel defining layer covers at least a portion of an edge of the first electrode; A second electrode is disposed on a side of the light-emitting layer away from the first electrode to obtain a light-emitting device layer.

13. A method for preparing a display panel, characterized in that: include: A light-emitting backplane and a light-conversion substrate are respectively provided; The light-emitting backplane is aligned with the light-conversion substrate, and the light-conversion substrate is located on the light-emitting side of the light-emitting backplane, so as to obtain a display panel; Wherein, providing a light conversion substrate comprises: Setting a light conversion layer; A first hollow is provided on the light conversion layer, wherein the light conversion layer comprises a plurality of light conversion units, different light conversion units are used to emit light of different colors, and the light conversion units are located between adjacent first hollows; A light shielding structure is disposed in the first hollow.

14. The preparation method according to claim 13, characterized in that: The step of setting the light-emitting backplane comprises: A driving layer is arranged on one side of the substrate layer to form a driving substrate; A first electrode is disposed on a side of the driving layer away from the substrate layer, wherein the first electrode is electrically connected to the driving layer; A light-emitting layer is disposed on a side of the first electrode away from the substrate layer; A second hollow is provided on the light-emitting layer, and a pixel defining layer is provided in the second hollow, wherein the pixel defining layer covers at least a portion of an edge of the first electrode; Disposing a second electrode on a side of the light-emitting layer away from the first electrode to obtain the light-emitting backplane; Wherein, the side of the light-emitting backplane away from the substrate layer is used to mate with the light conversion substrate.

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

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