Display panel and display device

Abstract

According to the display panel and the display device, the leakage current indication layer is arranged between the adjacent light-emitting material layers, and under the condition that leakage occurs after one light-emitting material layer is turned on, leakage charges can be transmitted to the position of the corresponding leakage current indication layer through the first transmission layer; under the action of electric leakage, the leakage current indicating layer reaches turn-on voltage, and the leakage current indicating layer is lightened to consume electric leakage charges, so that the charges are difficult to transmit to the adjacent light-emitting material layer through the first transmission layer, the phenomenon of color mixing of the display panel caused by secret lightening of the adjacent light-emitting material layer is avoided, and the display effect of the display panel is improved.

Description

Technical Field

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

[0002] With the development of display technology, electronic products with display functions are now widely used in various fields. For example, televisions, mobile phones, computers, personal digital assistants, etc. are all equipped with display functions, becoming an indispensable part of people's lives and work. Among them, the display panel is the core structure that realizes the display function of electronic products.

[0003] Organic Light-Emitting Diode (OLED) display panels have attracted widespread attention due to their self-luminescence, low power consumption, high brightness, and fast response times. However, OLED devices suffer from lateral leakage. This leakage in the charge generation layer can easily lead to light leakage in the display panel, which in turn affects the overall display quality. Utility Model Content

[0004] A display panel and a display device provided in the embodiments of the present application can improve the light leakage problem of the display panel and enhance the display effect of the display panel.

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

[0006] A driving substrate and a light-emitting device layer, wherein the driving substrate includes a substrate layer and a driving layer, the light-emitting device layer is arranged on a side of the driving layer away from the substrate layer, and the driving layer includes a pixel circuit;

[0007] The light-emitting device layer includes a first electrode, a pixel defining layer, a light-emitting layer, and a second electrode. The first electrode is arranged on a side of the driving layer away from the substrate layer. The first electrode is electrically connected to the pixel circuit. The pixel defining layer includes a pixel opening. The orthographic projection of the pixel opening on the substrate layer falls within the orthographic projection of the first electrode on the substrate layer. The light-emitting layer is arranged between the pixel defining layer and the second electrode.

[0008] The light-emitting layer includes a first transmission layer, a light-emitting material layer, and a second transmission layer. The light-emitting material layer is disposed between the first transmission layer and the second transmission layer. The first transmission layer covers at least a portion of the pixel defining layer and at least a portion of the first electrode.

[0009] A leakage indication layer is provided between at least two adjacent pixel openings, the leakage indication layer being provided between the first transmission layer and the second transmission layer, and an orthographic projection of the leakage indication layer on the substrate layer falling within an orthographic projection of the pixel defining layer on the substrate layer;

[0010] The turn-on voltage of the leakage current indicating layer is less than or equal to the turn-on voltage of the adjacent light-emitting material layer. The turn-on voltage is a driving voltage for driving the light-emitting material to emit light.

[0011] In some embodiments, an orthographic projection of the leakage indication layer on the substrate layer does not overlap with an orthographic projection of the luminescent material layer on the substrate layer.

[0012] In some embodiments, the light-emitting layer includes a first light-emitting material layer, a second light-emitting material layer, and a third light-emitting material layer, and the first light-emitting material layer, the second light-emitting material layer, and the third light-emitting material layer are used to emit light of different colors;

[0013] The leakage indication layer is provided in the same layer as at least one of the first light-emitting material layer, the second light-emitting material layer and the third light-emitting material layer.

[0014] In some embodiments, the leakage indication layer at least partially surrounds the pixel opening.

[0015] In some embodiments, at least a portion of the leakage indication layer is located in a spacing region between the first luminescent material layer and the second luminescent material layer; and / or

[0016] At least part of the leakage indication layer is located in the spacing region between the first luminescent material layer and the third luminescent material layer; and / or

[0017] At least a portion of the leakage indication layer is located in a spacing region between the second luminescent material layer and the third luminescent material layer.

[0018] In some embodiments, the first luminescent material layer is used to emit blue light, the second luminescent material layer is used to emit green light, and the third luminescent material layer is used to emit red light;

[0019] The leakage indicating layer located between the first luminescent material layer and the second luminescent material layer is used to emit red light; and / or,

[0020] The leakage indicating layer located between the first luminescent material layer and the third luminescent material layer is used to emit green light or red light; and / or,

[0021] The leakage indicating layer located between the second luminescent material layer and the third luminescent material layer is used for emitting red light.

[0022] In some embodiments, a dimension of the leakage indication layer in the first direction is smaller than a distance between two adjacent pixel openings; and / or

[0023] The size of the leakage indication layer in the second direction is smaller than the size of the pixel opening in the second direction;

[0024] The first direction is the direction of the connection between adjacent pixel openings, the second direction is parallel to the plane where the substrate layer is located, and the first direction and the second direction intersect.

[0025] In some embodiments, a size of an orthographic projection of the pixel defining layer between adjacent pixel openings on the substrate layer in the first direction is greater than 20 μm; and / or

[0026] The size of the leakage indication layer in the first direction is greater than or equal to 1 μm, and / or the size of the leakage indication layer in the second direction is less than or equal to 20 μm.

[0027] In some embodiments, an orthographic projection of the leakage indication layer on the substrate layer at least partially surrounds an orthographic projection of the luminescent material layer on the substrate layer.

[0028] In some embodiments, the first transmission layer includes a first groove and / or a first hollow, wherein an orthographic projection of the first groove on the substrate layer falls within an orthographic projection of the pixel definition layer on the substrate layer, and an orthographic projection of the first hollow on the substrate layer falls within an orthographic projection of the pixel definition layer on the substrate layer;

[0029] The first groove is provided in the spaced area between the leakage current indicating layer and the target luminescent material layer, and / or the first hollow is provided in the spaced area between the leakage current indicating layer and the target luminescent material layer; the turn-on voltage of the target luminescent material layer is greater than or equal to the turn-on voltage of the leakage current indicating layer;

[0030] or,

[0031] The orthographic projection of the first groove on the substrate layer falls within the orthographic projection of the leakage indication layer on the substrate layer, and / or the orthographic projection of the first hollow on the substrate layer falls within the orthographic projection of the leakage indication layer on the substrate layer.

[0032] In some embodiments, a dimension of the first groove in the third direction is greater than or equal to the thickness of the hole transport layer;

[0033] The third direction is a direction perpendicular to the plane where the substrate layer is located.

[0034] In some embodiments, further comprising:

[0035] a light shielding layer comprising a plurality of second hollows, wherein the orthographic projection of the light shielding layer on the substrate layer covers the orthographic projection of the pixel defining layer on the substrate layer;

[0036] A filter layer is disposed in the second hollow;

[0037] The orthographic projection of the leakage indicating layer on the substrate layer falls within the orthographic projection of the light shielding layer on the substrate layer;

[0038] The orthographic projection of the filter layer on the substrate layer covers the orthographic projection of the pixel opening on the substrate layer, and the orthographic projection of the filter layer on the substrate layer does not overlap with the orthographic projection of the leakage indication layer on the substrate layer.

[0039] According to a second aspect of the embodiments of the present application, a display device is provided, comprising the display panel of any of the above technical solutions.

[0040] According to a third aspect of the embodiments of the present application, a method for manufacturing a display panel is provided. The method includes:

[0041] Providing a driving substrate, wherein the driving substrate includes a substrate layer and a driving layer, and the driving layer includes a pixel circuit;

[0042] A light-emitting device layer is provided on one side of the driving substrate, wherein the light-emitting device layer includes a first electrode, a pixel defining layer, a light-emitting layer, and a second electrode, wherein the first electrode is provided on a side of the driving layer away from the substrate layer, and the first electrode is electrically connected to the pixel circuit, the pixel defining layer includes a pixel opening, and an orthographic projection of the pixel opening on the substrate layer falls within an orthographic projection of the first electrode on the substrate layer, and the light-emitting layer is provided between the pixel defining layer and the second electrode;

[0043] The light-emitting layer includes a first transmission layer, a light-emitting material layer, and a second transmission layer. The light-emitting material layer is disposed between the first transmission layer and the second transmission layer. The first transmission layer covers at least a portion of the pixel defining layer and at least a portion of the first electrode.

[0044] A leakage indication layer is provided between at least two adjacent pixel openings, the leakage indication layer being provided between the first transmission layer and the second transmission layer, and an orthographic projection of the leakage indication layer on the substrate layer falling within an orthographic projection of the pixel defining layer on the substrate layer;

[0045] The turn-on voltage of the leakage current indicating layer is less than or equal to the turn-on voltage of the adjacent light-emitting material layer. The turn-on voltage is a driving voltage for driving the light-emitting material to emit light.

[0046] In some embodiments, a light emitting device layer is provided on one side of a driving substrate, comprising:

[0047] A first electrode, a pixel defining layer, a light-emitting layer, and a second electrode are sequentially arranged on a side of the driving layer away from the substrate layer to obtain a light-emitting device, wherein the light-emitting layer includes a first transmission layer, a light-emitting material layer, and a second transmission layer;

[0048] Setting up the luminescent material layer includes:

[0049] Using different evaporation masks to respectively form a first luminescent material layer, a second luminescent material layer, a third luminescent material layer and a leakage indication layer, the first luminescent material layer, the second luminescent material layer and the third luminescent material layer being used to emit light of different colors;

[0050] The leakage indication layer and at least one of the first light-emitting material layer, the second light-emitting material layer and the third light-emitting material layer are synchronously provided by using the same evaporation mask.

[0051] The beneficial effects of this application are:

[0052] The present application arranges the leakage indication layer between adjacent luminescent material layers. When leakage occurs after one of the luminescent material layers is turned on, the leakage charge can be transmitted to the position of the corresponding leakage indication layer through the first transmission layer. Under the action of the leakage and the voltage, the leakage indication layer reaches the turn-on voltage, and the leakage indication layer lights up to consume the leakage charge, making it difficult for the charge to be transmitted to the adjacent luminescent material layer through the first transmission layer, so as to avoid the adjacent luminescent material layer from lighting up secretly and causing color mixing of the display panel, thereby improving the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 A schematic partial structural diagram of a display panel provided in an embodiment of the present application;

[0054] Figure 2 A brightness voltage curve diagram of a display panel provided in an embodiment of the present application;

[0055] Figure 3 A schematic top view of a display panel provided in an embodiment of the present application;

[0056] Figure 4 A schematic top view of another display panel provided in an embodiment of the present application;

[0057] Figure 5 A schematic top view of another display panel provided in an embodiment of the present application;

[0058] Figure 6 A schematic partial structural diagram of a display panel provided in an embodiment of the present application;

[0059] Figure 7 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0060] Figure 8 A schematic partial structural diagram of another display panel provided in an embodiment of the present application;

[0061] Figure 9 A schematic partial structural diagram of a display panel provided in an embodiment of the present application;

[0062] Figure 10 A schematic top view of another display panel provided in an embodiment of the present application;

[0063] Figure 11 A schematic top view of another display panel provided in an embodiment of the present application;

[0064] Figure 12 A schematic diagram of a partial structure of a display device provided in an embodiment of the present application;

[0065] Figure 13 A schematic flow chart of a method for manufacturing a display panel provided in an embodiment of the present application.

[0066] The reference numerals in the figures represent:

[0067] 100, display panel; 200, driving substrate; 210, substrate layer; 220, driving layer; 300, light-emitting device layer; 310, first electrode; 320, pixel defining layer; 321, pixel opening; 330, light-emitting layer; 331, first transmission layer; 332, light-emitting material layer; 333, second transmission layer; 340, second electrode; 350, leakage indication layer; 360, first groove; 370, first hollow; 380, second groove; 410, light-shielding layer; 411, second hollow; 420, filter layer; X, first direction; Y, second direction; Z, third direction; A1, fourth direction; A2, fifth direction. DETAILED DESCRIPTION

[0068] 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.

[0069] In this article, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also include elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the statement "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or equipment comprising the elements. The term "two or more" includes two or more than two cases.

[0070] The embodiments of the present application provide a display panel, a display device, and a manufacturing method thereof, which can improve the light leakage problem of the display panel and enhance the display effect of the display panel.

[0071] 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, with reference to Figure 1 , provides a display panel, including 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 light-emitting device layer 300 is arranged on a side of the driving layer 220 away from the substrate layer 210, and the driving layer 220 includes a pixel circuit.

[0072] For example, the substrate layer may include a flexible substrate or a hard substrate, the flexible substrate may include polyimide, and the hard substrate may be glass. The pixel defining layer may be used to define pixel boundaries, thereby preventing color mixing between pixels and improving display effects.

[0073] The driver circuit of the driver layer is electrically connected to the pixel circuit to drive the light-emitting devices of the light-emitting device layer to emit light for different pixels. The driver 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 with two TFTs (thin-film transistors) and one capacitor. Similarly, 7T1C is a circuit structure with seven TFTs and one capacitor, and so on.

[0074] In some examples, reference Figure 1 The light-emitting device layer 300 includes a first electrode 310, a pixel defining layer 320, a light-emitting layer 330, and a second electrode 340. The first electrode 310 is disposed on a side of the driving layer 220 away from the substrate layer 210. The first electrode 310 is electrically connected to the pixel circuit. The pixel defining layer 320 includes a pixel opening 321. The orthographic projection of the pixel opening 321 on the substrate layer 210 falls within the orthographic projection of the first electrode 310 on the substrate layer 210. The light-emitting layer 330 is disposed between the pixel defining layer 320 and the second electrode 340.

[0075] Exemplary, reference Figure 1 The light-emitting layer 330 includes a first transmission layer 331, a light-emitting material layer 332 and a second transmission layer 333. The light-emitting material layer 332 is arranged between the first transmission layer 331 and the second transmission layer 333. The first transmission layer 331 covers at least a portion of the pixel defining layer 320 and at least a portion of the first electrode 310. The pixel opening 312 is used to expose most of the upper surface of the first electrode 310 so that the first electrode 310 is connected to the light-emitting layer 330.

[0076] For example, the first electrode 310 may be an anode, the first transport layer 331 may include a hole injection layer and a hole transport layer, and the second transport layer 333 may include an electron generation layer and an electron transport layer.

[0077] refer to Figure 1 A leakage indicator layer 350 is disposed between at least two adjacent pixel openings 321. The leakage indicator layer 350 is disposed between the first transmission layer 331 and the second transmission layer 333. The orthographic projection of the leakage indicator layer 350 on the substrate layer 210 falls within the orthographic projection of the pixel definition layer 320 on the substrate layer 210. The turn-on voltage of the leakage indicator layer 350 is less than or equal to the turn-on voltage of the adjacent luminescent material layer 332. The turn-on voltage is the driving voltage that drives the luminescent material to emit light. The leakage indicator layer 350 can be an electroluminescent material, and the turn-on voltage can serve as a parameter for driving the electroluminescent material to emit light.

[0078] Exemplarily, the pixel circuit can be electrically connected to the first electrode, and the light-emitting layer can emit light of a corresponding color through the first electrode and the second electrode. The second electrode can be arranged on a side of the light-emitting layer away from the first electrode. The pixel defining layer covers the edge of the first electrode, and the first transport layer can cover part of the first electrode and part of the pixel defining layer, or the first transport layer can cover all of the first electrode and all of the pixel defining layer. The first transport layer is arranged near the first electrode, and the first transport layer can form holes through the first electrode. Correspondingly, the second transport layer is arranged near the second electrode, and the second transport layer can form electrons through the second electrode. The first transport layer and the second transport layer can cause the light-emitting material layer between them to emit light. Since the first transmission layer and the second electrode can be arranged as a whole layer, the first transmission layer covers the light-emitting material layers in different pixel openings, and there will be lateral leakage in the first transmission layer. The holes in the first transmission layer will be transmitted along the pixel defining layer toward the adjacent pixel opening. There is charge in the first transmission layer in the area between the adjacent pixel openings, so that holes and electrons can be formed on the upper and lower opposite sides of the leakage indicator layer respectively, so that the leakage indicator layer emits light to consume the holes in the first transmission layer, avoiding the phenomenon that adjacent light-emitting material layers are lit separately due to the lateral leakage of the first transmission layer, thereby avoiding the light leakage problem caused by the lateral leakage.

[0079] It should be noted that the film layer of the luminescent material layer is used to emit light. If the luminescent material layer has a stealth phenomenon, the adjacent luminescent material layers will emit light and mixed light will occur, so that the color of the light emitted by the light-emitting device does not correspond to the target color, thereby reducing the display effect of the display panel.

[0080] The present application arranges the leakage indicator layer between adjacent luminescent material layers. When leakage occurs after one of the luminescent material layers is illuminated, the leakage charge can be transmitted to the position of the corresponding leakage indicator layer through the first transmission layer. Under the action of the first electrode and the second electrode, the leakage indicator layer reaches the light-on voltage. The light-on voltage of the leakage indicator layer is less than or equal to the light-on voltage of the adjacent luminescent material layer. Compared with the luminescent material layer that is secretly illuminated, the leakage indicator layer is closer to the luminescent material layer that is illuminated. The leakage indicator layer is illuminated to consume the leakage charge, making it difficult for the charge to be transmitted to the adjacent luminescent material layer through the first transmission layer, so as to avoid the adjacent luminescent material layer secretly illuminating and causing color mixing of the display panel, thereby improving the display effect of the display panel.

[0081] In some examples, an orthographic projection of the leakage indication layer on the substrate layer does not overlap with an orthographic projection of the luminescent material layer on the substrate layer.

[0082] Exemplary, reference Figure 1 The leakage indication layer 350 is arranged on the side of the pixel defining layer 320 away from the substrate layer 210, and the light-emitting material layer 332 is arranged in the pixel opening 321. The side wall surface of the pixel opening 321 corresponding to the pixel defining layer 320 is inclined or perpendicular to the plane of the substrate layer 210. The positive projection of the leakage indication layer 350 on the substrate layer 210 and the positive projection of the light-emitting material layer 332 on the substrate layer 210 do not overlap, that is, the leakage indication layer 350 and the light-emitting material layer 332 are arranged at intervals, and the two cannot form an electrical connection, which can prevent the leakage current from continuing to be transmitted laterally to other adjacent light-emitting material layers 332, causing other adjacent light-emitting material layers 332 to emit light. For example, after the leakage indication layer 350 is lit, the adjacent light-emitting material layer 332 will not be lit synchronously, thereby avoiding the adjacent light-emitting material layer 322 from producing a stealth light phenomenon.

[0083] In some examples, the light-emitting layer includes a first light-emitting material layer, a second light-emitting material layer, and a third light-emitting material layer, each configured to emit light of different colors. The leakage current indicator layer is disposed in the same layer as at least one of the first, second, and third light-emitting material layers. This co-location can avoid adding additional process steps and increasing production costs.

[0084] Exemplarily, the luminescent material layer can emit light of multiple colors, for example, the first luminescent material layer emits red light, the second luminescent material layer emits blue light, and the third luminescent material layer emits green light. When one of the luminescent material layers is lit, if lateral leakage occurs, the charge is transmitted to another adjacent luminescent material layer. By lighting up the leakage indicator layer arranged between the two luminescent material layers, the lateral transmitted charge can be consumed, thereby avoiding the phenomenon of other adjacent luminescent material layers secretly lighting up.

[0085] In some examples, the orthographic projection area of ​​the leakage indication layer disposed between adjacent light-emitting material layers on the substrate layer is smaller than the orthographic projection area of ​​any adjacent light-emitting material layer on the substrate layer.

[0086] For example, compared with the luminescent material layer, the leakage indication layer has a smaller orthographic projection area, and the brightness of the light generated by the leakage indication layer when it is lit is lower, which has less impact on the display effect of the display panel.

[0087] In some examples, the leakage indication layer at least partially surrounds the pixel opening. By surrounding the pixel opening corresponding to the light-emitting material layer with a low turn-on voltage through the leakage indication layer, the leakage charge transmitted in the corresponding direction in the first transmission layer can be prevented from being transmitted to the light-emitting material layer corresponding to the pixel opening. That is, when there are multiple light-emitting material layers with lateral leakage around the pixel opening, the leakage indication layer surrounding the pixel opening can consume the leakage charge by emitting light, making it difficult for the light-emitting material layer in the pixel opening to light up secretly, thereby improving the display effect of the display panel.

[0088] In some examples, at least a portion of the leakage indication layer is located in a spacing region between the first light-emitting material layer and the second light-emitting material layer.

[0089] Illustratively, disposing the leakage current indicating layer between the first luminescent material layer and the second luminescent material layer can prevent the luminescent material layer with a lower turn-on voltage from lighting up secretly.

[0090] In some examples, at least a portion of the leakage indication layer is located in a spacing region between the first light emitting material layer and the third light emitting material layer.

[0091] Exemplarily, the leakage current indicating layer is disposed between the first luminescent material layer and the third luminescent material layer, so as to avoid the luminescent material layer with a lower turn-on voltage from lighting up secretly between the first luminescent material layer and the third luminescent material layer.

[0092] In some examples, at least a portion of the leakage indication layer is located in a spacing region between the second light-emitting material layer and the third light-emitting material layer.

[0093] Exemplarily, the leakage current indicating layer is disposed between the second luminescent material layer and the third luminescent material layer, so as to avoid the light-stealing phenomenon of the luminescent material layer with the lower turn-on voltage among the second luminescent material layer and the third luminescent material layer.

[0094] In some examples, at least part of the leakage indication layer is located in the space between the first luminescent material layer and the second luminescent material layer, and at least part of the leakage indication layer is located in the space between the first luminescent material layer and the third luminescent material layer.

[0095] It should be noted that, depending on the arrangement of the luminescent material layers and the different turn-on voltages, a leakage indicator layer may be set in the spacing area between different luminescent material layers, or no leakage indicator layer may be set when the luminescent turn-on voltages of both are high, that is, there may be a spacing area between adjacent luminescent material layers where no leakage indicator layer is set, and there may be a spacing area between adjacent luminescent material layers where a leakage indicator layer is set.

[0096] It should be noted that the display panel may be provided with multiple leakage indication layers, for example, a red leakage indication layer and a green leakage indication layer may be provided at the same time.

[0097] For example, the first light-emitting material layer can emit blue light, and the turn-on voltage corresponding to the blue light-emitting material can be the highest. After the area where the first light-emitting material layer is located produces lateral leakage to a first transmission layer, it is more likely to cause the adjacent second light-emitting material layer and the third light-emitting material layer to light up secretly. Therefore, the leakage indicator layer is arranged between the first light-emitting material layer and the second light-emitting material layer and the first light-emitting material layer and the third light-emitting material layer. The turn-on voltage of the leakage indicator layer is smaller than the turn-on voltage of the second light-emitting material layer and the third light-emitting material layer. By lighting up the leakage indicator layer, the phenomenon that the first light-emitting material layer with a high turn-on voltage causes the second light-emitting material layer and the third light-emitting material layer to light up can be avoided.

[0098] In some examples, at least part of the leakage indication layer is located in the space between the first luminescent material layer and the second luminescent material layer, and at least part of the leakage indication layer is located in the space between the second luminescent material layer and the third luminescent material layer.

[0099] In some examples, at least part of the leakage indication layer is located in the space between the first luminescent material layer and the third luminescent material layer, and at least part of the leakage indication layer is located in the space between the second luminescent material layer and the third luminescent material layer.

[0100] In some examples, at least part of the leakage indication layer is located in the spacing region between the first light-emitting material layer and the second light-emitting material layer, at least part of the leakage indication layer is located in the spacing region between the second light-emitting material layer and the third light-emitting material layer, and at least part of the leakage indication layer is located in the spacing region between the second light-emitting material layer and the third light-emitting material layer.

[0101] For example, the three light-emitting material layers can emit light of different colors respectively, and the three light-emitting layers correspond to different turn-on voltages. The leakage current indicator layer is arranged between two adjacent light-emitting material layers, which can avoid the problem of the corresponding two light-emitting material layers being turned on due to leakage, and further improve the display effect of the display panel.

[0102] For example, if leakage current occurs in one adjacent layer of the same luminescent material, the other layer can illuminate secretly. Furthermore, the same luminescent material layers can emit light of the same color. Since both layers emit light of the same color, the hidden illumination between the layers has a minimal impact on the display quality of the display panel. Therefore, a leakage current indicator layer may not be provided between adjacent layers of the same luminescent material. For example, the blue luminescent material layer has a higher turn-on voltage. Even if leakage current exists, it is difficult to illuminate the adjacent blue luminescent material layer. Therefore, the leakage current indicator layer has a limited effect. Therefore, a leakage current indicator layer may not be provided in the space between adjacent first luminescent material layers.

[0103] In some examples, the first light-emitting material layer is used to emit blue light, the second light-emitting material layer is used to emit green light, and the third light-emitting material layer is used to emit red light.

[0104] Figure 2 This is a brightness voltage curve diagram of a display panel provided in an embodiment of the present application. Figure 2 , exemplary, Figure 2 The relationship between the driving voltage and brightness corresponding to the red light-emitting material layer R, the green light-emitting material layer G and the blue light-emitting material layer B is shown. Figure 2 The horizontal axis is the driving voltage, in volts V. Figure 2 The vertical axis is the brightness, the unit is cd / m 2 , candela / square meter, Figure 2 The turn-on voltage corresponding to the red light-emitting material layer R is the lowest, the turn-on voltage corresponding to the blue light-emitting material layer B is the highest, and the turn-on voltage corresponding to the green light-emitting material layer G is between the red light-emitting material layer R and the blue light-emitting material layer B.

[0105] In some examples, the turn-on voltage of the leakage current indicating layer is less than the highest turn-on voltage corresponding to the adjacent light-emitting material layer, and is less than or equal to the lowest turn-on voltage.

[0106] Exemplarily, setting the turn-on voltage of the leakage indicator layer can prevent the adjacent luminescent material layer with a low turn-on voltage from lighting up secretly, and the luminous area of ​​the leakage indicator layer is smaller than the luminous area of ​​the luminescent material layer, so as to improve the display effect of the display panel.

[0107] In some examples, different light-emitting material layers may correspond to leakage current indicating layers with different turn-on voltages.

[0108] In some examples, the leakage indication layer located between the first light-emitting material layer and the second light-emitting material layer is configured to emit green light or red light.

[0109] Exemplarily, the second light-emitting material layer emits green light, and the turn-on voltage of the leakage current indicating layer can be less than or equal to the turn-on voltage corresponding to the green light-emitting material layer G, so as to emit green light or red light.

[0110] In some examples, the leakage indication layer located between the first light-emitting material layer and the third light-emitting material layer is configured to emit red light.

[0111] Exemplarily, the third light-emitting material layer emits red light, and the turn-on voltage of the leakage current indicating layer is less than or equal to the turn-on voltage corresponding to the red light-emitting material layer R, so as to emit red light.

[0112] In some examples, the leakage indication layer located between the second luminescent material layer and the third luminescent material layer is configured to emit red light.

[0113] Exemplarily, the second light-emitting material layer emits green light, and the third light-emitting material layer emits red light. The turn-on voltage of the leakage indicator layer should be less than the turn-on voltage corresponding to the green light-emitting material layer G, and less than or equal to the turn-on voltage corresponding to the red light-emitting material layer R.

[0114] In some examples, a dimension of the leakage indication layer in a first direction is smaller than a distance between two adjacent pixel openings, and the first direction is a direction of a line connecting adjacent pixel openings.

[0115] Exemplarily, the distance between two adjacent pixel openings can be the distance on the side of the pixel defining layer close to the driving substrate, and the distance on the side of the pixel defining layer away from the driving substrate can be smaller than the distance on the side of the pixel defining layer close to the driving substrate. The size setting of the leakage indication layer in the first direction can avoid the connection between the luminescent material layer and the leakage indication layer, so that the luminescent material layer and the leakage indication layer emit light synchronously.

[0116] In some examples, a dimension of the leakage indication layer in the second direction is smaller than a dimension of the pixel opening in the second direction, the second direction is parallel to the plane where the substrate layer is located, and the second direction intersects the first direction.

[0117] Exemplarily, the second direction can be the length direction of the light-emitting material layer on the substrate layer. The light-emitting material layer is arranged at the pixel opening of the pixel defining layer. The size setting of the leakage indicator layer ensures that the leakage indicator layer is located on the side of the pixel defining layer away from the substrate layer to avoid the leakage indicator layer and the light-emitting material layer connected thereto and with a low turn-on voltage from emitting light synchronously.

[0118] In some examples, the orthographic projection of the leakage indication layer on the substrate layer falls within the orthographic projection of the pixel defining layer on the substrate layer, so that the orthographic projection of the leakage indication layer on the substrate layer does not overlap with the orthographic projection of the luminescent material layer on the substrate layer, that is, the leakage indication layer has no connection with the luminescent material layer in the first direction and the second direction, and the leakage indication layer has no connection with the luminescent layer.

[0119] In some examples, a size of an orthographic projection of the pixel defining layer on the substrate layer in the first direction is greater than 20 μm.

[0120] For example, the size of the pixel defining layer in the first direction may be 30 μm, 35 μm or 40 μm.

[0121] In some examples, a dimension of the leakage indication layer in the first direction is greater than or equal to 1 μm.

[0122] For example, the size of the leakage indication layer in the first direction may be 1 μm, 2 μm or 3 μm.

[0123] In some examples, a dimension of the leakage indication layer in the second direction is less than or equal to 20 μm.

[0124] For example, the size of the leakage indication layer in the second direction may be 10 μm, 15 μm or 20 μm.

[0125] In some examples, a dimension of the leakage indication layer in the first direction is greater than or equal to 1 μm, and a dimension of the leakage indication layer in the second direction is less than or equal to 20 μm.

[0126] For example, the sizes of the leakage indication layer in the first direction and the second direction may be 1 μm and 20 μm, 2 μm and 15 μm, or 3 μm and 10 μm, respectively.

[0127] For example, the size of the leakage indicating layer may be adjusted according to actual processing conditions.

[0128] In some examples, an orthographic projection of the leakage indication layer on the substrate layer at least partially surrounds an orthographic projection of the luminescent material layer on the substrate layer.

[0129] Figure 3 This is a schematic top view of a display panel provided in an embodiment of the present application. Figure 3Any light-emitting device may include a blue light-emitting material layer B, a green light-emitting material layer G, and a red light-emitting material layer R. The blue light-emitting material layer B corresponds to a blue sub-pixel, the green light-emitting material layer G corresponds to a green sub-pixel, and the red light-emitting material layer R corresponds to a red sub-pixel. The orthographic projection area of ​​the blue light-emitting material layer B on the substrate layer is larger than the orthographic projection area of ​​the red light-emitting material layer R on the substrate layer, and the orthographic projection area of ​​the red light-emitting material layer R on the substrate layer is larger than the orthographic projection area of ​​the green light-emitting material layer G on the substrate layer. The red sub-pixels, blue sub-pixels, and green sub-pixels in the same pixel unit may be arranged in a herringbone pattern. For example, in the column direction, the red light-emitting material layer R and the green light-emitting material layer G are alternately arranged and located on the same side of the same blue light-emitting material layer B. Multiple pixel units may be arranged in an array, with multiple blue light-emitting material layers B spaced apart in the column direction, and the red light-emitting material layers R and the green light-emitting material layers G alternately arranged. In the row direction, the blue light-emitting material layer B may alternate with the red light-emitting material layer R or the green light-emitting material layer G.

[0130] Exemplary, reference Figure 3 The red light-emitting material layer R is more prone to the phenomenon of stealing light. The leakage indication layer 350 can form a ring array around the red light-emitting material layer R to avoid the phenomenon of stealing light in the red light-emitting material layer R caused by leakage of the adjacent light-emitting material layer 332.

[0131] Exemplarily, the luminescent material layer may correspond to the same color of light as the adjacent luminescent material layer, and the leakage indication layer may not be provided in the two luminescent material layers, and the leakage indication layer may partially surround the luminescent material layer.

[0132] Exemplary, reference Figure 3 For the pixel distribution of the display panel, the distribution area of ​​blue light is larger, and the areas of green light and red light are small and arranged alternately. Therefore, the leakage indication layer 350 can completely surround the red light-emitting material layer R, the leakage indication layer 350 can completely surround the green light-emitting material layer G, and the leakage indication layer 350 can partially surround the blue light-emitting material layer B.

[0133] Figure 4 This is a schematic top view of another display panel provided in an embodiment of the present application. Figure 4 Since the red light corresponds to the lowest turn-on voltage, when lateral leakage occurs after the blue light-emitting material layer B or the green light-emitting material layer G is turned on, the red light-emitting material layer R is more likely to turn on secretly. Therefore, the leakage current indication layer 350 completely surrounds the red light-emitting material layer R to prevent the red light-emitting material layer R from turning on secretly.

[0134] Figure 5 This is a schematic top view of another display panel provided in an embodiment of the present application. Figure 5Since the turn-on voltage of blue light is the largest, after the blue light-emitting material layer B is lit, the red light-emitting material layer R is more susceptible to leakage and may light up secretly. Therefore, the leakage current indication layer 350 is arranged between the red light-emitting material layer R and the blue light-emitting material layer B to partially surround the red light-emitting material layer R, thereby blocking the charge transfer between the blue light-emitting material layer B and the red light-emitting material layer R to prevent the red light-emitting material layer R from lighting up secretly.

[0135] In some examples, the first transmission layer includes a first groove, the orthographic projection of the first groove on the substrate layer falls within the orthographic projection of the pixel defining layer on the substrate layer, and the first groove is arranged in the interval area between the leakage indication layer and the target light-emitting material layer. The first groove can reduce the leakage charge that the first transmission layer continues to transmit to the target light-emitting material layer. The target light-emitting material layer can be a light-emitting material layer in the adjacent light-emitting material layers where the stealing light phenomenon occurs. For example, the red light-emitting material layer and the blue light-emitting material layer are adjacent, and the red light-emitting material layer is the target light-emitting material layer. The turn-on voltage of the target light-emitting material layer is greater than or equal to the turn-on voltage of the leakage indication layer.

[0136] Figure 6 This is a schematic partial structural diagram of a display panel provided in an embodiment of the present application. For example, refer to Figure 6 The first groove 360 ​​is arranged between the leakage indication layer 350 and the target light-emitting material layer. The target light-emitting material layer can be a light-emitting material layer with a low turn-on voltage. For example, the first light-emitting material and the second light-emitting material layer are arranged adjacent to each other. The second light-emitting material layer is used to emit red light, and the adjacent first light-emitting material layer is used to emit blue light or green light. The turn-on voltage of the second light-emitting material layer is less than the turn-on voltage of the first light-emitting material layer. The target light-emitting material layer can be the second light-emitting material layer.

[0137] For example, the second luminescent material layer is configured to emit green light, the adjacent first luminescent material layer is configured to emit blue light, the turn-on voltage of the second luminescent material layer is lower than the turn-on voltage of the first luminescent material layer, and the target luminescent material layer may be the second luminescent material layer. The first groove 360 ​​can reduce the amount of charge transferred from the first transfer layer 331 to the second luminescent material layer without affecting the luminescence of the leakage current indication layer 350.

[0138] In some examples, the orthographic projection of the first groove on the substrate layer can fall within the orthographic projection of the leakage indication layer on the substrate layer, and part of the structure of the leakage indication layer can be set in the first groove. The first groove reduces the continued transmission of the amount of charge in the first transmission layer, and the leakage indication layer further consumes the charge in the first transmission layer, so that less charge is transmitted through the first transmission layer.

[0139] In some examples, reference Figure 6The size of the first groove 360 ​​in the third direction Z is smaller than the thickness of the first transmission layer 331, so as to reduce the thickness of the first transmission layer 331 corresponding to the first groove 360, and reduce the amount of charge transmitted to the light-emitting material layer 330 through the first transmission layer 331. The third direction Z is a direction perpendicular to the plane where the substrate layer 210 is located.

[0140] In some examples, first grooves may be provided on both sides of the leakage indication layer in the first direction. The first grooves may reduce the charge transmitted to the leakage indication layer through the first transmission layer, and further consume the charge through the leakage indication layer to avoid the occurrence of the light-stealing phenomenon of the luminescent material layer.

[0141] Figure 7 A schematic partial structural diagram of another display panel provided in an embodiment of the present application. In some examples, reference Figure 7 A second groove is provided on the pixel defining layer, and the second groove is provided corresponding to the first groove. The orthographic projection of the second groove on the substrate layer may overlap with the orthographic projection of the first groove on the substrate layer. The second groove is used to increase the transmission path of the charge in the first transmission layer to further consume the charge and reduce the possibility of the light-emitting material layer stealing light.

[0142] In some examples, the orthographic projection of the first groove on the substrate layer can fall within the orthographic projection of the second groove on the substrate layer, so as to form the first groove on the first transmission layer, and the shape of the first groove can match the shape of the second groove; the setting of the second groove can play a certain blocking role in the transmission of leakage charge.

[0143] Figure 8 A schematic partial structural diagram of another display panel provided in an embodiment of the present application. In some examples, reference Figure 8 The first transmission layer 331 includes a first hollow 370, and the orthographic projection of the first hollow 370 on the substrate layer 210 falls within the orthographic projection of the pixel defining layer 320 on the substrate layer 210. The first hollow 370 is arranged in the interval area between the leakage indication layer 350 and the target light-emitting material layer. The first hollow 370 can reduce the leakage charge transmitted from the first transmission layer to the target light-emitting material layer. The target light-emitting material layer can be the light-emitting material layer 332 in the adjacent light-emitting material layers where the stealing phenomenon occurs. For example, the red light-emitting material layer R and the blue light-emitting material layer B are adjacent, the red light-emitting material layer R is the target light-emitting material layer, and the turn-on voltage of the target light-emitting material layer is greater than or equal to the turn-on voltage of the leakage indication layer 350.

[0144] Exemplary, reference Figure 8The target light-emitting material layer among the adjacent light-emitting material layers has the lowest turn-on voltage. The leakage indication layer is arranged on the side of the first hollow 370 away from the target light-emitting material layer. The leakage indication layer consumes the charge in the first transmission layer. The first hollow 370 allows the first transmission layer 331 among the adjacent light-emitting material layers to be disconnected, thereby further preventing the target light-emitting material layer from secretly lighting up through the first hollow 370.

[0145] In some examples, the orthographic projection of the first hollow on the substrate layer falls within the orthographic projection of the leakage indication layer on the substrate layer. The first hollow can prevent charge transfer between the first transmission layers on both sides. The leakage indication layer consumes the charge to avoid the light-emitting material layer from being stole.

[0146] In some examples, first hollows may be provided on both sides of the leakage indication layer in the first direction.

[0147] In some examples, the first transmission layer includes a first groove and a first hollow, the first hollow can be set between the leakage indication layer and the target luminescent material layer, and the first groove can be set between the target luminescent material layer and the luminescent material layer.

[0148] In some examples, an orthographic projection of the first groove on the substrate layer may fall within an orthographic projection of the leakage indication layer on the substrate layer, and the first hollow may be provided between the leakage indication layer and the target luminescent material layer.

[0149] Figure 9 This is a schematic partial structural diagram of a display panel provided in an embodiment of the present application. Figure 9 In some examples, the display panel 100 further includes a light shielding layer 410 and a light filter layer 420. The light shielding layer 410 includes a plurality of second hollows 411. The orthographic projection of the light shielding layer 410 on the substrate layer 210 covers the orthographic projection of the pixel defining layer 320 on the substrate layer 210. The light filter layer 420 is disposed in the second hollows 411.

[0150] Exemplarily, the coverage may be full coverage or partial coverage.

[0151] In some examples, the orthographic projection of the leakage indicator layer on the substrate layer falls within the orthographic projection of the light shielding layer on the substrate layer. The light shielding layer can block light emitted by the leakage indicator layer, preventing it from emitting into the environment, thereby improving the display quality of the display panel. The orthographic projection of the filter layer on the substrate layer covers the orthographic projection of the pixel opening on the substrate layer, and the orthographic projection of the filter layer on the substrate layer does not overlap with the orthographic projection of the leakage indicator layer on the substrate layer. The filter layer is positioned corresponding to the pixel opening to improve the color purity of the display panel.

[0152] For example, the light shielding layer can block the light emitted from the leakage indicating layer, thereby preventing the light from mixing with the light emitted from the adjacent luminescent material layer, thereby preventing the light from being mixed with the light emitted from the adjacent luminescent material layer, thereby affecting the light purity and display effect of the display panel.

[0153] Figure 10 A schematic top view of another display panel provided in an embodiment of the present application. Figure 10 In some examples, the shape of the orthographic projection of the pixel opening 321 on the substrate layer can be a rectangle. For example, the multiple pixel units can be arranged in an array, and the blue light-emitting material layer B and the red light-emitting material layer R can be alternately arranged in the row direction and the column direction. In the fourth direction A1, the red light-emitting material layer R and the green light-emitting material layer G are alternately arranged. In the fifth direction A2, the blue light-emitting material layer B and the green light-emitting material layer G are alternately arranged. The fourth direction A1 is parallel to the plane where the drive substrate is located, and the fourth direction A1 intersects with the row direction, the column direction, and the fifth direction A2. The fifth direction A2 is parallel to the plane where the drive substrate is located, and the fifth direction A2 intersects with the row direction, the column direction, and the fourth direction A1.

[0154] It should be noted that, combined with the above description, although Figure 10 The location of the leakage indication layer is not shown in the figure, but it can be understood that the leakage indication layer is located in the pixel defining layer between the three light-emitting material layers.

[0155] Figure 11 A schematic top view of another display panel provided in an embodiment of the present application. Figure 10 In some examples, the shape of the orthographic projection of the pixel opening 321 on the substrate layer can be a circle. Exemplarily, the plurality of pixel units can be arranged in an array, and the blue light-emitting material layer B and the red light-emitting material layer R can be alternately arranged in the row direction and the column direction. In the fourth direction A1, the red light-emitting material layer R and the green light-emitting material layer G are alternately arranged. In the fifth direction A2, the blue light-emitting material layer B and the green light-emitting material layer G are alternately arranged. The fourth direction A1 is parallel to the plane where the driving substrate is located, and the fourth direction A1 intersects with the row direction, the column direction and the fifth direction A2. The fifth direction A2 is parallel to the plane where the driving substrate is located, and the fifth direction A2 intersects with the row direction, the column direction and the fourth direction A1

[0156] In some examples, the orthographic projection shape of the pixel opening on the substrate layer may be an irregular shape.

[0157] In the second aspect of this application, Figure 12 This is a schematic diagram of a partial structure of a display device provided in an embodiment of the present application, with reference to Figure 12 The present application provides a display device, which includes: a display panel 100 according to any of the above technical solutions.

[0158] The display device provided in the embodiments 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.

[0159] The third aspect of this application is Figure 13 A schematic flow chart of a method for manufacturing a display panel provided in an embodiment of the present application is provided. Figure 13 The present application provides a method for manufacturing a display panel. The method comprises:

[0160] S100: Setting a driving substrate. The driving substrate includes a substrate layer and a driving layer, and the driving layer includes a pixel circuit;

[0161] For example, the substrate layer may include a flexible substrate or a rigid substrate. The flexible substrate may include polyimide, while the rigid substrate may be made of glass. The pixel definition layer may be used to define pixel boundaries, thereby preventing color mixing between pixels and improving display quality. The driver circuit of the driver layer is electrically connected to the pixel circuit to drive the light-emitting device layer to emit light from different pixels.

[0162] S200: Disposing a light-emitting device layer on one side of the drive substrate. The light-emitting device layer includes a first electrode, a pixel defining layer, a light-emitting layer, and a second electrode. The first electrode is disposed on a side of the drive layer away from the substrate layer and is electrically connected to the pixel circuit. The pixel defining layer includes a pixel opening, and the orthographic projection of the pixel opening on the substrate layer falls within the orthographic projection of the first electrode on the substrate layer. The light-emitting layer is disposed between the pixel defining layer and the second electrode.

[0163] Illustratively, the driving substrate may drive the light emitting device layer to emit light.

[0164] In some examples, the light-emitting layer includes a first transmission layer, a light-emitting material layer, and a second transmission layer, the light-emitting material layer is disposed between the first transmission layer and the second transmission layer, and the first transmission layer covers at least a portion of the pixel defining layer and at least a portion of the first electrode.

[0165] In some examples, a leakage indication layer is provided between at least two adjacent pixel openings, the leakage indication layer is provided between the first transmission layer and the second transmission layer, and the orthographic projection of the leakage indication layer on the substrate layer falls within the orthographic projection of the pixel definition layer on the substrate layer.

[0166] For example, after the light-emitting material layer lights up and lateral leakage occurs, the holes in the first transmission layer flow to the leakage indicator layer. Since the leakage indicator layer is closer to the light-emitting material layer that lights up, and the turn-on voltage of the leakage indicator layer is less than or equal to the light-emitting material layer that lights up secretly, the holes can be consumed by the leakage indicator layer, thereby preventing the holes from flowing to the adjacent light-emitting material layer and secretly lighting up, thereby improving the display effect of the display panel.

[0167] In some examples, a turn-on voltage of the leakage current indicating layer is less than or equal to a turn-on voltage of an adjacent light-emitting material layer, where the turn-on voltage is a driving voltage that drives the light-emitting material to emit light.

[0168] Exemplarily, the leakage current indicator layer has a relatively low turn-on voltage, so that the leakage current indicator layer can be turned on before the adjacent light-emitting material layer, so as to consume holes in the first transmission layer and improve the display effect of the display panel.

[0169] In some examples, step S200 includes:

[0170] S210: sequentially disposing a first electrode, a pixel defining layer, a light-emitting layer, and a second electrode on a side of the driving layer away from the substrate layer to obtain the light-emitting device, wherein the light-emitting layer includes a first transmission layer, a light-emitting material layer, and a second transmission layer.

[0171] S220: Providing a luminescent material layer includes:

[0172] The first luminescent material layer, the second luminescent material layer, the third luminescent material layer and the leakage indication layer are respectively provided using different evaporation masks. The first luminescent material layer, the second luminescent material layer and the third luminescent material layer are used to emit different light.

[0173] In some examples, the leakage indication layer and at least one of the first light-emitting material layer, the second light-emitting material layer, and the third light-emitting material layer are simultaneously disposed using the same evaporation mask.

[0174] Exemplarily, the leakage indicator layer and the luminescent material layer are set synchronously, for example, both can emit red light. The leakage indicator layer can prevent the luminescent material layer from being secretly illuminated, and the mask step of the leakage indicator layer can be omitted, thereby improving the processing efficiency of the display panel without affecting the effect of the leakage indicator layer.

[0175] In some examples, the preparation method of the present application further includes:

[0176] S300: a first groove is provided on the first transmission layer, wherein the orthographic projection of the first groove on the substrate layer falls within the orthographic projection of the pixel definition layer on the substrate layer, the first groove is provided in the interval area between the leakage current indication layer and the target light-emitting material layer, the turn-on voltage of the target light-emitting material layer is greater than the turn-on voltage of the leakage current indication layer, and the orthographic projection of the first groove on the substrate layer falls within the orthographic projection of the leakage current indication layer on the substrate layer. Or,

[0177] A first hollow is set on the first transmission layer, and the orthographic projection of the first hollow on the substrate layer falls within the orthographic projection of the pixel definition layer on the substrate layer. The first hollow is set in the interval area between the leakage current indication layer and the target light-emitting material layer. The turn-on voltage of the target light-emitting material layer is greater than the turn-on voltage of the leakage current indication layer. The orthographic projection of the first hollow on the substrate layer falls within the orthographic projection of the leakage current indication layer on the substrate layer.

[0178] Illustratively, the first groove and the first hollow can reduce or prevent the holes in the first transmission layer from being transmitted to the adjacent luminescent material layer. The first groove, the first hollow and the leakage indication layer can be used together to further prevent the adjacent luminescent material layer from being secretly illuminated.

[0179] In some examples, step S300 further includes:

[0180] A first groove and a first hollow are provided on the first transmission layer.

[0181] It should be noted that, in the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0182] 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.

[0183] 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 concepts. 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.

[0184] Obviously, those skilled in the art may make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if such changes and modifications fall within the scope of the claims of this specification and their equivalents, this specification is intended to include such changes and modifications.

Claims

1. A display panel, characterized in that: include: A driving substrate and a light-emitting device layer, wherein the driving substrate includes a substrate layer and a driving layer, the light-emitting device layer is arranged on a side of the driving layer away from the substrate layer, and the driving layer includes a pixel circuit; The light-emitting device layer includes a first electrode, a pixel defining layer, a light-emitting layer, and a second electrode. The first electrode is arranged on a side of the driving layer away from the substrate layer. The first electrode is electrically connected to the pixel circuit. The pixel defining layer includes a pixel opening. The orthographic projection of the pixel opening on the substrate layer falls within the orthographic projection of the first electrode on the substrate layer. The light-emitting layer is arranged between the pixel defining layer and the second electrode. The light-emitting layer includes a first transmission layer, a light-emitting material layer, and a second transmission layer. The light-emitting material layer is disposed between the first transmission layer and the second transmission layer. The first transmission layer covers at least a portion of the pixel defining layer and at least a portion of the first electrode. A leakage indication layer is provided between at least two adjacent pixel openings, the leakage indication layer is provided between the first transmission layer and the second transmission layer, and an orthographic projection of the leakage indication layer on the substrate layer falls within an orthographic projection of the pixel definition layer on the substrate layer; The turn-on voltage of the leakage current indicating layer is less than or equal to the turn-on voltage of the adjacent light-emitting material layer, and the turn-on voltage is a driving voltage for driving the light-emitting material to emit light.

2. The display panel according to claim 1, wherein: An orthographic projection of the leakage indication layer on the substrate layer does not overlap with an orthographic projection of the luminescent material layer on the substrate layer.

3. The display panel according to claim 1, wherein: The light-emitting layer includes a first light-emitting material layer, a second light-emitting material layer and a third light-emitting material layer, wherein the first light-emitting material layer, the second light-emitting material layer and the third light-emitting material layer are used to emit light of different colors; The leakage indication layer is provided in the same layer as at least one of the first light-emitting material layer, the second light-emitting material layer, and the third light-emitting material layer.

4. The display panel according to claim 3, wherein: The leakage indication layer at least partially surrounds the pixel opening.

5. The display panel according to claim 3, wherein: At least a portion of the leakage indication layer is located in a spacing region between the first luminescent material layer and the second luminescent material layer; and / or At least a portion of the leakage indication layer is located in a spacing region between the first luminescent material layer and the third luminescent material layer; and / or At least a portion of the leakage indication layer is located in a spacing region between the second light-emitting material layer and the third light-emitting material layer.

6. The display panel according to claim 5, wherein: The first luminescent material layer is used to emit blue light, the second luminescent material layer is used to emit green light, and the third luminescent material layer is used to emit red light; The leakage indicating layer located between the first luminescent material layer and the second luminescent material layer is used to emit green light or red light; and / or, The leakage indication layer located between the first luminescent material layer and the third luminescent material layer is used to emit red light; and / or, The leakage indicating layer located between the second luminescent material layer and the third luminescent material layer is used to emit red light.

7. The display panel according to claim 1, wherein: The size of the leakage indication layer in the first direction is smaller than the distance between two adjacent pixel openings; and / or The size of the leakage indication layer in the second direction is smaller than the size of the pixel opening in the second direction; The first direction is the direction of the connection between adjacent pixel openings, the second direction is parallel to the plane where the substrate layer is located, and the first direction and the second direction intersect.

8. The display panel according to claim 7, wherein: The size of the orthographic projection of the pixel defining layer between adjacent pixel openings on the substrate layer in the first direction is greater than 20 μm; and / or The size of the leakage indication layer in the first direction is greater than or equal to 1 μm, and / or the size of the leakage indication layer in the second direction is less than or equal to 20 μm.

9. The display panel according to claim 1, wherein: The orthographic projection of the leakage indication layer on the substrate layer at least partially surrounds the orthographic projection of the luminescent material layer on the substrate layer.

10. The display panel according to any one of claims 1 to 9, characterized in that: The first transmission layer includes a first groove and / or a first hollow, wherein the orthographic projection of the first groove on the substrate layer falls within the orthographic projection of the pixel definition layer on the substrate layer, and the orthographic projection of the first hollow on the substrate layer falls within the orthographic projection of the pixel definition layer on the substrate layer; The first groove is provided in the spaced area between the leakage current indicator layer and the target luminescent material layer, and / or the first hollow is provided in the spaced area between the leakage current indicator layer and the target luminescent material layer; the turn-on voltage of the target luminescent material layer is greater than or equal to the turn-on voltage of the leakage current indicator layer; or, The orthographic projection of the first groove on the substrate layer falls within the orthographic projection of the leakage indication layer on the substrate layer, and / or the orthographic projection of the first hollow on the substrate layer falls within the orthographic projection of the leakage indication layer on the substrate layer.

11. The display panel according to claim 10, wherein: The dimension of the first groove in the third direction is less than or equal to the thickness of the first transmission layer; The third direction is a direction perpendicular to the plane where the substrate layer is located.

12. The display panel according to claim 1, wherein Also includes: a light-shielding layer comprising a plurality of second hollows, wherein an orthographic projection of the light-shielding layer on the substrate layer covers an orthographic projection of the pixel defining layer on the substrate layer; a filter layer, disposed in the second hollow; The orthographic projection of the leakage indication layer on the substrate layer falls within the orthographic projection of the light shielding layer on the substrate layer; The orthographic projection of the filter layer on the substrate layer covers the orthographic projection of the pixel opening on the substrate layer, and the orthographic projection of the filter layer on the substrate layer does not overlap with the orthographic projection of the leakage indication layer on the substrate layer.

13. A display device, characterized in that: include: A display panel as claimed in any one of claims 1 to 12.

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