Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel includes: a substrate; the array layer is positioned on one side of the substrate; the light-emitting devices are arranged on the side, away from the substrate, of the array layer, and the surfaces, close to the substrate, of the light-emitting devices are not lower than the surface, away from the substrate, of the array layer; wherein one side, far away from the substrate, of the array layer is provided with a plurality of grooves, and the grooves at least partially surround the light-emitting device. According to the display panel, the problem that the light absorbing material climbs to the surface of the light emitting device due to the capillary siphon effect in the preparation process can be solved, and the display effect and the light emitting efficiency can be remarkably 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] In the field of Micro LED (micro light emitting diode) display technology, in order to improve display contrast, it is usually necessary to set a light absorbing layer around the light emitting chip, for example, by inkjet printing (Inkjet Printing, abbreviated as IJP) of black ink.

[0003] However, during the IJP printing process, black ink is prone to ink climbing due to the capillary siphon effect, that is, the ink spreads along the chip surface, causing the light-absorbing layer to cover the chip's light-emitting area, thereby affecting the display effect and light output efficiency.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the invention

[0005] Based on this, the embodiments of the present application provide a display panel and a display device, which can solve the problem of light-absorbing materials climbing to the surface of the light-emitting device due to the capillary siphon effect during the preparation process, thereby significantly improving the display effect and light output efficiency of the display panel.

[0006] According to some embodiments, the present application provides a display panel, including:

[0007] substrate;

[0008] An array layer, located on one side of the substrate;

[0009] The plurality of light emitting devices are arranged on a side of the array layer away from the substrate, and the surface of the light emitting devices close to the substrate is not lower than the surface of the array layer away from the substrate;

[0010] Wherein, a plurality of grooves are provided on a side of the array layer away from the substrate, and the grooves at least partially surround the light-emitting device.

[0011] According to some embodiments, the present application further provides a display device on the other hand, including the display panel provided in the aforementioned embodiments.

[0012] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application.

[0013] The embodiments of the present application may or at least have the following advantages:

[0014] The display panel provided by the present application forms a physical barrier by setting a plurality of grooves surrounding the light-emitting device on the side of the array layer away from the substrate, which effectively blocks the path of the light-absorbing material (such as black ink) climbing along the surface of the light-emitting device during the subsequent preparation of the light-absorbing layer. In addition, the setting of the grooves also increases the height difference between the light-absorbing layer area and the light-emitting device, cleverly avoiding the problem of the light-absorbing material climbing along the surface of the light-emitting device due to the reduction of the height difference between the two. Therefore, the present application can solve the problem of the light-absorbing material climbing to the surface of the light-emitting device due to the capillary siphon effect during the preparation process, so that the display effect and light extraction efficiency of the display panel are significantly improved.

[0015] Other advantages, objectives and features of the present application will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and study, or can be taught from the practice of the present application to some extent. The objectives and other advantages of the present application can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0017] Figure 1 A schematic diagram of a cross-sectional structure of a display panel in some embodiments of the present application;

[0018] Figure 2 A partial cross-sectional schematic diagram of a display panel in some embodiments of the present application;

[0019] Figure 3 This is a schematic diagram of a cross-sectional structure when a display panel is provided with a light absorbing layer in some embodiments of the present application;

[0020] Figure 4 This is a schematic diagram of a cross-sectional structure when a display panel is provided with a hydrophobic structure in some embodiments of the present application;

[0021] Figure 5 It is a partial cross-sectional schematic diagram of a display panel provided with a hydrophobic structure in some embodiments of the present application;

[0022] Figure 6 This is a schematic diagram of a cross-sectional structure when a protrusion is provided in a groove of a display panel in some embodiments of the present application;

[0023] Figure 7 A schematic diagram of a cross-sectional structure when an array layer of a display panel includes a first area and a second area as defined in some embodiments of the present application;

[0024] Figure 8A schematic diagram of a cross-sectional structure in which an array layer of a display panel includes a first area and a second area and is provided with a protrusion for some embodiments of the present application;

[0025] Fig. 9 This is a schematic diagram of a cross-sectional structure when a display panel is provided with a passivation layer in some embodiments of the present application;

[0026] Fig.10 This is a schematic diagram of a cross-sectional structure when a display panel is provided with a passivation layer and a light absorbing layer in some embodiments of the present application;

[0027] Fig.11 This is a schematic diagram of the structure of a display device in some embodiments of the present application.

[0028] Description of reference numerals:

[0029] 1. Display device; 10. Display panel;

[0030] 100', substrate; 100, array layer; 100A, first region; 100B, second region; 101, groove; 101', protrusion; 101a, third protrusion; 101b, fourth protrusion; 102, light absorption layer;

[0031] 20r, red light emitting device; 20g, green light emitting device; 20b, blue light emitting device; 201, first electrode; 202, second electrode;

[0032] 300, encapsulation film layer; 400, hydrophobic structure; 500, passivation layer. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0035] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0036] In the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity. It is understood that when a layer or element is referred to as being "on" another layer or substrate, the layer or element may be directly on the other layer or substrate, or there may be intervening layers. In addition, it is also understood that when a layer is referred to as being "between" two layers, the layer may be the only layer between the two layers, or there may be one or more intervening layers. In addition, the same reference numerals always represent the same elements.

[0037] Hereinafter, although terms such as "first", "second", etc. may be used to describe various components, these components are not necessarily limited to the above terms. The above terms are only used to distinguish one component from another. It will also be understood that expressions used in the singular include plural expressions unless the expression in the singular has an obviously different meaning in the context.

[0038] When a statement such as "at least one (of)..." is located after a list of elements, it modifies the entire list of elements rather than the individual elements in the list. The term "and / or" as used herein includes any and all combinations of one or more related listed items. As used in the application documents, the term "and / or" includes any and all combinations of one or more related listed items. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0039] In the field of Micro LED (micro light emitting diode) display technology, in order to improve display contrast, it is usually necessary to set a light absorbing layer around the light emitting chip. However, during the preparation of the light absorbing layer, due to the influence of the capillary siphon effect, the light absorbing material easily spreads along the chip surface, causing the light absorbing layer to cover the chip light emitting area, thereby affecting the display effect and light output efficiency.

[0040] In view of the above shortcomings, the present application provides a display panel and a display device, which can solve the problem that the light-absorbing material climbs to the surface of the light-emitting device due to the capillary siphon effect during the preparation process, so that the display effect and light extraction efficiency of the display panel are significantly improved. The details will be described in the subsequent embodiments.

[0041] In the embodiment of the present application, the display panel may include a micro light emitting diode display (Micro Light Emitting Diode Display, referred to as Micro LED), an organic light emitting diode display panel (Organic Light Emitting Diode, referred to as OLED), a quantum dot electroluminescent display panel (Quantum Dot Light Emitting Diodes, referred to as QLED) or a sub-millimeter light emitting diode display (Mini Light Emitting Diode Display, referred to as Mini LED), etc. The embodiment of the present application is described by taking the display panel as a Micro LED display panel as an example.

[0042] See also Figure 1 and Figure 2 The display panel provided in the present application includes: a substrate 100 ′, an array layer 100 located on one side of the substrate 100 ′, and a plurality of light-emitting devices.

[0043] As an example, the plurality of light emitting devices may include a first color light emitting device and a second color light emitting device. The first color light emitting device may include a red light emitting device 20r, and the second color light emitting device may include a green light emitting device 20g and / or a blue light emitting device 20b.

[0044] like Figure 1 As shown, a plurality of light emitting devices are arranged on a side of the array layer 100 away from the substrate 100 ′, and a surface of the light emitting devices close to the substrate 100 ′ is not lower than a surface of the array layer 100 away from the substrate 100 ′.

[0045] A plurality of grooves 101 are disposed on a side of the array layer 100 away from the substrate 100 ′, and the grooves 101 at least partially surround the light emitting device.

[0046] The display panel provided in the present application forms a physical barrier by providing a plurality of grooves 101 at least partially surrounding the light emitting device on the side of the array layer 100 away from the substrate 100', thereby effectively preventing the subsequent light absorbing layer 102 (such as Figure 3 The path of the light-absorbing material climbing along the surface of the light-emitting device during the preparation process of the light-absorbing layer 100 is shown in FIG. Moreover, the setting of the groove 101 also increases the height difference between the light-absorbing layer area and the light-emitting device, cleverly avoiding the problem of the light-absorbing material climbing along the surface of the light-emitting device due to the reduction of the height difference between the two. Therefore, the present application can solve the problem of the light-absorbing material climbing to the surface of the light-emitting device due to the capillary siphon effect during the preparation process, so that the display effect and light extraction efficiency of the display panel are significantly improved.

[0047] Take the light absorbing layer 102 as an example, which is realized by inkjet printing (IJP) of black ink. The display panel provided by the present application effectively blocks the path of ink climbing along the surface of the light emitting device by setting a groove 101 surrounding the light emitting device in the array layer 100, thereby significantly reducing the influence of the capillary siphon effect. Moreover, the setting of the groove 101 can increase this height difference to a certain extent, further suppressing the ink climbing.

[0048] As an example, combining Figure 1 and Figure 2 It is understood that the boundary of the orthographic projection of the light-emitting device on the array layer 100 can be located inside the orthographic projection of the corresponding groove 101 on the array layer 100. By allowing the orthographic projection of the light-emitting device to fall inside the orthographic projection of the groove 101, the light-absorbing material (such as black ink) can stay inside the groove 101 more accurately when being guided into the groove 101, and will not overflow into the area of ​​the light-emitting device. In this way, it is possible to avoid the light-absorbing material from being applied to areas that should not be covered, ensuring that the light-absorbing material only covers the target area, which is conducive to improving the accuracy of subsequent processes.

[0049] Please continue reading Figure 1 In some embodiments, the boundary of the orthographic projection of the bottom of the groove 101 on the surface of the array layer 100 is located inside the top of the groove 101. That is, the groove 101 presents a "wide at the top and narrow at the bottom" morphology in a plan view, so as to guide the light absorbing material into the groove 101.

[0050] In some embodiments, Figure 1 As shown, the angle θ between the side wall of the array layer 100 in the groove 101 and the plane where the bottom of the groove 101 is located satisfies: 95°≤θ≤175°. As an example, the angle θ between the side wall of the array layer 100 in the groove 101 and the plane where the bottom of the groove 101 is located can be 95°, 120°, 135°, 150° or 175°, etc.

[0051] The angle of the inner wall of the groove 101 directly affects the flow of the light absorbing material (such as black ink) in the groove 101. When the angle θ is set between 95° and 175°, the light absorbing material can be more effectively guided into the groove 101, which not only ensures a sufficient drainage effect, but also prevents the light absorbing material from accumulating or flowing back on the side wall of the groove 101, thereby facilitating the uniform coating of the light absorbing material and achieving a higher processing accuracy of the light absorbing layer 102.

[0052] In the display panel, in addition, due to the differences in materials and structures between the red light-emitting device 20r and the green light-emitting device 20g and the blue light-emitting device 20b, for example, the red light-emitting device 20r generally uses mirror reflection (Mirror) technology, while the green light-emitting device 20g and the blue light-emitting device 20b generally use distributed Bragg reflector (DBR) technology. During the laser welding process, since the DBR structure has a higher reflectivity than the mirror reflection structure, under the same laser power, the melting degree of the welding layer in the red light-emitting device 20r (for example, the Sn-Sn welding layer using tin as the welding material) is higher, resulting in that when the light-emitting device is bonded to the back panel by laser welding, the overall height of the red light-emitting device 20r will be slightly lower than that of the green light-emitting device 20g and the blue light-emitting device 20b.

[0053] When black ink is printed by inkjet printing, the overall height of the red light-emitting device 20r is slightly lower than that of the green light-emitting device 20g and the blue light-emitting device 20b after being bonded to the backplane, and the surface of the red light-emitting device 20r is sometimes designed to be microscopically uneven (also called a roughened structure), resulting in the capillary siphon effect of the red light-emitting device 20r becoming obvious, while the light-emitting surfaces of the green light-emitting device 20g and the blue light-emitting device 20b usually adopt a patterned sapphire substrate (Patterned Sapphire Substrate, also called PSS structure), and their capillary siphon effect is weaker than the roughened structure of the red light-emitting device 20r.

[0054] As a result, the black ink is more likely to spread to the surface of the red light-emitting device 20r, affecting the display quality.

[0055] Please continue reading Figure 1 In some embodiments, a depth value H1 of the groove 101 located on one side of the first color light-emitting device (e.g., the red light-emitting device 20r) in a direction perpendicular to the surface of the array layer 100 is greater than or equal to a depth value H2 of the groove 101 located on one side of the second color light-emitting device (e.g., the green light-emitting device 20g and the blue light-emitting device 20b) in a direction perpendicular to the surface of the array layer 100.

[0056] For example, Figure 1 As shown, the groove 101 on one side of the second color light emitting device has the same or substantially the same depth value in the direction perpendicular to the surface of the array layer 100. For example, the depth value H2 of the groove 101 on one side of the green light emitting device 20g in the direction perpendicular to the surface of the array layer 100 is the same or substantially the same as the depth value H3 of the groove 101 on one side of the blue light emitting device 20b in the direction perpendicular to the surface of the array layer 100.

[0057] Please continue reading Figure 1In some embodiments, the width value W1 of the groove 101 located on one side of the first color light-emitting device (e.g., the red light-emitting device 20r) in the direction parallel to the surface of the array layer 100 is greater than or equal to the width value W2 of the groove 101 located on one side of the second color light-emitting device (e.g., the green light-emitting device 20g and the blue light-emitting device 20b) in the direction parallel to the surface of the array layer 100.

[0058] For example, Figure 1 As shown, the grooves 101 on one side of each second color light emitting device have the same or substantially the same depth value in the direction perpendicular to the surface of the array layer 100. For example, the width value W2 of the groove 101 on one side of the green light emitting device 20g in the direction perpendicular to the surface of the array layer 100 is the same or substantially the same as the width value W3 of the groove 101 on one side of the blue light emitting device 20b in the direction perpendicular to the surface of the array layer 100.

[0059] In the above embodiments, the problem of black ink easily turning red at high temperatures can be optimized by setting the depth value H1 of the groove 101 on the side of the red light-emitting device 20r to be greater than or equal to the depth value H2 of the groove 101 on the side of the green light-emitting device 20g and the side of the blue light-emitting device 20b, and / or setting the width value W1 of the groove 101 on the side of the red light-emitting device 20r to be greater than or equal to the width value W2 of the groove 101 on the side of the green light-emitting device 20g and the side of the blue light-emitting device 20b, thereby ensuring the consistency and reliability of the overall display quality of the display panel.

[0060] Please continue reading Figure 1 In some embodiments, the display panel may further include: a packaging film layer 300. The packaging film layer 300 covers the light emitting device and is located on a side surface of the light emitting device away from the array layer 100.

[0061] For example, a transparent inorganic film layer or an organic film layer may be covered on a surface of the light emitting device away from the array layer 100 as the encapsulation film layer 300 .

[0062] Covering the surface of the light-emitting device with the encapsulation film layer 300 can not only increase the height of the light-emitting device from the substrate, but also avoid the capillary siphon effect of the light-emitting surface microstructure of the light-emitting device on the light-absorbing layer 102. In addition, the encapsulation film layer 300 can also protect the light-emitting device from physical damage and environmental factors (such as moisture, oxygen and other pollutants), which is beneficial to ensure the long-term stability and display performance of the light-emitting device. In addition, some encapsulation film layers 300 can also improve the light extraction efficiency, increase the amount of light emitted from the light-emitting device by reducing internal reflection, and help enhance the brightness and light extraction efficiency of the light-emitting device.

[0063] Exemplarily, the encapsulation film layer 300 may be prepared by a photolithography process and a dry etching process, but is not limited thereto.

[0064] See also Figure 4 and Figure 5 In some embodiments, the display panel may further include a hydrophobic structure 400. The hydrophobic structure 400 is disposed on the edge of the surface of the light emitting device away from the array layer 100.

[0065] In the above embodiment, the surface tension of the edge of the light-emitting surface of the light-emitting device can be changed by setting a hydrophobic structure 400, making it difficult for light-absorbing materials (such as black ink) to adhere to or cover the light-emitting surface of the light-emitting device, thereby significantly improving the capillary siphon phenomenon and further improving the light extraction efficiency and display effect of the display panel.

[0066] In some embodiments, in combination Figure 4 and Figure 5 It is understood that the orthographic projection of the hydrophobic structure 400 on the light emitting device forms a closed figure. Exemplarily, the hydrophobic structure 400 can be an annular ultra-thin design.

[0067] In the above embodiment, the hydrophobic structure 400 is designed as a closed pattern, so that a closed area can be accurately formed at the edge of the surface of the light-emitting device as an area for controlling the flow of liquid (such as transparent ink), thereby preventing the liquid from overflowing or expanding too much in the edge area, which is conducive to improving the controllability of subsequent processes. In some embodiments, the width of the hydrophobic structure 400 in the direction parallel to the surface of the array layer 100 is less than or equal to the width of the groove 101 corresponding to the same light-emitting device in the direction parallel to the surface of the array layer 100.

[0068] For example, Figure 4 and Figure 5 As shown, the width W4 of the hydrophobic structure 400 disposed on the red light emitting device 20r in the direction parallel to the surface of the array layer 100 is less than or equal to the width W1 of the groove 101 corresponding to the red light emitting device 20r in the direction parallel to the surface of the array layer 100 .

[0069] The embodiment of the present application does not specifically limit the thickness of the hydrophobic structure 400. As an example, the thickness of the hydrophobic structure 400 may range from 5 nm to 15 nm. For example, the thickness of the hydrophobic structure 400 may be 5 nm, 8 nm, 10 nm, 12 nm, or 15 nm, etc.

[0070] In addition, the present embodiment does not specifically limit the preparation method of the hydrophobic structure 400. As an example, a hydrophobic layer can be sprayed on the edge of the surface of the light emitting device away from the array layer 100 using ultrasonic spraying technology to form the hydrophobic structure 400.

[0071] See also Figure 6 In some embodiments, at least one protrusion 101 ′ is disposed in the groove 101 .

[0072] like Figure 6 As shown, in some embodiments, the boundary of the orthographic projection of the top of the groove 101 on the surface of the array layer 100 is located inside the orthographic projection of the bottom of the groove 101 on the surface of the array layer 100. That is, the groove 101 presents a "narrow top and wide bottom" morphology in a plan view.

[0073] In some embodiments, Figure 6 As shown, the angle θ between the side wall of the array layer 100 in the groove 101 and the plane where the bottom of the groove 101 is located satisfies: 5°≤θ≤85°.

[0074] As an example, the angle θ between the side wall of the array layer 100 in the groove 101 and the plane where the bottom of the groove 101 is located can be 5°, 15°, 35°, 60°, 85°, etc.

[0075] For ease of understanding, in some of the following embodiments, Figure 6 As shown, the protrusion 101' set in the groove 101 located on one side of the first color light-emitting device (for example, the red light-emitting device 20r) is defined as the third protrusion 101a, and the protrusion 101' set in the groove 101 located on one side of the second color light-emitting device (for example, the green light-emitting device 20g and the blue light-emitting device 20b) is defined as the fourth protrusion 101b.

[0076] Please continue reading Figure 6 In some embodiments, a depth value H1' of the third protrusion 101a in a direction perpendicular to the surface of the array layer 100 is greater than or equal to a depth value H2' of the fourth protrusion 101b (for example, the fourth protrusion 101b located on one side of the green light-emitting device 20g) in a direction perpendicular to the surface of the array layer 100.

[0077] For example, Figure 6 As shown, the depth values ​​of the fourth protrusions 101b in the direction perpendicular to the surface of the array layer 100 are the same or substantially the same. For example, the depth value H2' of the fourth protrusion 101b located on the side of the green light emitting device 20g in the direction perpendicular to the surface of the array layer 100 is the same or substantially the same as the depth value H3' of the fourth protrusion 101b located on the side of the blue light emitting device 20b in the direction perpendicular to the surface of the array layer 100.

[0078] In some embodiments, the number of the third protrusions 101 a is greater than the number of the fourth protrusions 101 b .

[0079] Please combine Figure 6 Understand, in Figure 6In the display panel shown, the depth H1' of the third protrusion 101a on the red light emitting device 20r is greater than the depth H2' of the fourth protrusion 101b on the green light emitting device 20g, and the number of the third protrusions 101a is greater than the number of the fourth protrusions 101b.

[0080] In the above embodiments, the problem of black ink easily turning red at high temperatures can be optimized by setting the depth value H1' of the third protrusion 101a on the side of the red light-emitting device 20r to be greater than or equal to the depth value H2' of the fourth protrusion 101b on the side of the green light-emitting device 20g and the blue light-emitting device 20b, and setting the number of third protrusions 101a to be greater than the number of fourth protrusions 101b, etc., thereby ensuring the consistency and reliability of the overall display quality of the display panel.

[0081] In some embodiments, the width value W2' of the protrusion 101' (for example, the fourth protrusion 101b located on one side of the green light-emitting device 20g) in the direction parallel to the surface of the array layer 100 is less than or equal to the depth value H2 of the groove 101 corresponding to the same light-emitting device (for example, the green light-emitting device 20g) in the direction perpendicular to the surface of the array layer 100.

[0082] For easier understanding, see Figure 7 In some of the following embodiments, the array layer 100 is defined to include a first region 100A and a second region 100B, and the second region 100B at least partially surrounds the first region 100A.

[0083] For example, the first region 100A may include a pixel circuit region, and the second region 100B may include a pixel circuit compression region at least partially surrounding the pixel circuit region, but this is not limited thereto.

[0084] In the laser welding process, since the energy at the center of the linear laser is higher than that at the edge, while ensuring the bonding strength of the welding layer in the second area 100B corresponding to the edge, the melting degree of the welding layer in the first area 100A corresponding to the center of the laser will be higher than that in the second area 100B. As a result, the overall height of the light-emitting device located in the first area 100A when bonded to the backplane will be slightly lower than that of the light-emitting device located in the second area 100B. As a result, the black ink is more likely to spread to the surface of the light-emitting device located in the first area 100A, affecting the display quality.

[0085] In some embodiments, Figure 7 As shown, a depth value H5 of the groove 101 located in the second region 100B in a direction perpendicular to the surface of the array layer 100 is less than or equal to a depth value H6 of the groove 101 located in the first region 100A in a direction perpendicular to the surface of the array layer 100 .

[0086] In some embodiments, a width W5 of the groove 101 in the second region 100B in a direction parallel to the surface of the array layer 100 is less than or equal to a width W6 of the groove 101 in the first region 100A in a direction parallel to the surface of the array layer 100 .

[0087] Please combine Figure 7 Understand, in Figure 7 In the display panel shown, the depth value H5 of the groove 101 located in the second area 100B is smaller than the depth value H6 of the groove 101 located in the first area 100A, and the width value W5 of the groove 101 located in the second area 100B is smaller than the width value W6 of the groove 101 located in the first area 100A.

[0088] In the above embodiments, in order to address the phenomenon that the height of the light-emitting device located in the second area 100B is lower than the height of the light-emitting device located in the first area 100A, the depth value of the groove 101 located in the second area 100B can be set to be less than or equal to the depth value of the groove 101 located in the first area 100A, and the width value of the groove 101 located in the second area 100B can be set to be less than or equal to the width value of the groove 101 located in the first area 100A. One or more of the above methods can make the first area 100A more effective in suppressing ink climbing, thereby improving the consistency and reliability of the overall display quality of the display panel.

[0089] For easier understanding, see Figure 8 In some of the following embodiments, a protrusion disposed in the groove 101 located in the first region 100A is defined as a first protrusion 101c, and a protrusion disposed in the groove 101 located in the second region 100B is defined as a second protrusion 101d.

[0090] In some embodiments, Figure 8 As shown, a depth value H5 ′ of the second protrusion 101 d in a direction perpendicular to the surface of the array layer 100 is less than or equal to a depth value H6 ′ of the first protrusion 101 c in a direction perpendicular to the surface of the array layer 100 .

[0091] In the above embodiment, in order to address the phenomenon that the height of the light-emitting device located in the first area 100A is lower than the height of the light-emitting device located in the second area 100B, the depth value of the second protrusion 101d located in the second area 100B can be set to be less than or equal to the depth value of the first protrusion 101c located in the first area 100A, so that the first area 100A has a more significant effect in suppressing ink climbing, thereby improving the consistency and reliability of the overall display quality of the display panel.

[0092] It should be noted that the groove 101 involved in the embodiment of the present application can be a groove prepared by the array segment process. The array segment process is mainly used to integrate the thin film transistor (Thin Film Transistor, referred to as TFT) array and / or other related circuits (such as driving circuits) onto the substrate; or, the groove 101 can also be a groove prepared by the panel segment process. The panel segment is an assembly stage in the display panel manufacturing process, which is mainly used to assemble the substrate completed by the array segment process with the backlight module to form a complete display panel. By accurately controlling the shape of the groove 101 in the processes of the array segment and the panel segment, it helps to avoid the groove 101 from affecting the height difference between the black ink printing area and the surface of the light-emitting side of the light-emitting device, thereby ensuring the suppression effect of the ink climbing phenomenon.

[0093] Exemplarily, a planarization (PLN) layer may be further provided on the side of the array layer 100 facing the light emitting device to provide a flat surface for constructing a subsequent light emitting device structure thereon, thereby improving the overall performance and reliability of the display panel.

[0094] See also Fig. 9 In some embodiments, the display panel may also be provided with a passivation layer 500. The passivation layer 500 covers the surface of the array layer 100 facing the light-emitting device and fills the groove 101. Optionally, the passivation layer 500 may also cover the first electrode 201 and the second electrode 202 of the light-emitting device (for example, the red light-emitting device 20r). The passivation layer 500 may serve as a protective barrier to effectively prevent moisture, oxygen and other substances in the environment from invading the interior of the array layer 100 and causing damage to sensitive devices such as TFTs contained in the array layer 100, thereby extending the service life of the display panel. The passivation layer 500 fills the groove 101 and can provide a flatter surface to provide a good foundation for constructing subsequent film layers and / or device structures thereon, which is beneficial to the subsequent processes. For example Fig.10 As shown, the light absorption layer 102 may be formed on a surface of the passivation layer 500 that is away from the array layer 100 .

[0095] For example, the passivation layer 500 may be made of inorganic materials such as silicon oxide or silicon nitride, but is not limited thereto. The passivation layer 500 may also be made of organic materials such as polyimide.

[0096] Based on the same inventive concept, the present application also provides a display device. Fig.11 The display device 1 includes the display panel 10 provided in the above embodiment. The display device 1 can also achieve the technical effects that the above display panel 10 can achieve, which will not be described in detail here.

[0097] It can be understood that the display device 1 in the embodiment of the present application can be a Micro-LED display device, an OLED display device, a QLED display device, electronic paper, a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, a wearable device, an Internet of Things device, or any other product or component with a display function, and the embodiment of the present application is not limited to this.

[0098] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features of the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0099] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A display panel, characterized in that: include: substrate; An array layer, located on one side of the substrate; A plurality of light emitting devices are arranged on a side of the array layer away from the substrate, and a surface of the light emitting devices close to the substrate is not lower than a surface of the array layer away from the substrate; Wherein, a plurality of grooves are provided on a side of the array layer away from the substrate, and the grooves at least partially surround the light-emitting device.

2. The display panel according to claim 1, characterized in that: The boundary of the orthographic projection of the bottom of the groove on the surface of the array layer is located inside the top of the groove.

3. The display panel according to claim 2, characterized in that: The angle θ between the side wall of the array layer in the groove and the plane where the bottom of the groove is located satisfies: 95° ≤ θ ≤ 175°.

4. The display panel according to claim 1, characterized in that: The display panel further comprises: a hydrophobic structure arranged on a surface edge of the light emitting device away from the array layer.

5. The display panel according to claim 4, characterized in that: The orthographic projection of the hydrophobic structure on the light-emitting device forms a closed figure.

6. The display panel according to claim 4, characterized in that: The width of the hydrophobic structure in the direction parallel to the surface of the array layer is less than or equal to the width of the groove corresponding to the same light-emitting device in the direction parallel to the surface of the array layer.

7. The display panel according to claim 1, characterized in that: At least one protrusion is arranged in the groove.

8. The display panel according to claim 7, characterized in that: The boundary of the orthographic projection of the top of the groove on the surface of the array layer is located inside the orthographic projection of the bottom of the groove on the surface of the array layer.

9. The display panel according to claim 7, characterized in that: The width of the protrusion in a direction parallel to the surface of the array layer is less than or equal to the depth of the groove corresponding to the same light-emitting device in a direction perpendicular to the surface of the array layer.

10. The display panel according to claim 1, characterized in that: The array layer includes a first region and a second region, wherein the second region at least partially surrounds the first region; The depth of the groove located in the second region in the direction perpendicular to the surface of the array layer is greater than or equal to the depth of the groove located in the first region in the direction perpendicular to the surface of the array layer; and / or, The width of the groove located in the second region in a direction parallel to the surface of the array layer is greater than or equal to the width of the groove located in the first region in a direction parallel to the surface of the array layer.

11. The display panel according to claim 7, characterized in that: The array layer includes a first area and a second area, wherein the second area at least partially surrounds the first area; at least one first protrusion is disposed in the groove located in the first area, and at least one second protrusion is disposed in the groove located in the second area; A depth value of the second protrusion in a direction perpendicular to the surface of the array layer is greater than or equal to a depth value of the first protrusion in a direction perpendicular to the surface of the array layer.

12. The display panel according to claim 1, characterized in that: The light emitting device comprises a first color light emitting device and a second color light emitting device; The depth of the groove located on one side of the first color light emitting device in the direction perpendicular to the surface of the array layer is greater than or equal to the depth of the groove located on one side of the second color light emitting device in the direction perpendicular to the surface of the array layer; and / or, The width of the groove located on one side of the first color light emitting device in a direction parallel to the surface of the array layer is greater than or equal to the width of the groove located on one side of the second color light emitting device in a direction parallel to the surface of the array layer.

13. The display panel according to claim 7, characterized in that: The light-emitting device comprises a first color light-emitting device and a second color light-emitting device; at least one third protrusion is arranged in the groove located on one side of the first color light-emitting device, and at least one fourth protrusion is arranged in the groove located on one side of the second color light-emitting device; A depth value of the third protrusion in a direction perpendicular to the surface of the array layer is greater than or equal to a depth value of the fourth protrusion in a direction perpendicular to the surface of the array layer.

14. The display panel according to claim 7, characterized in that: The light emitting device comprises a first color light emitting device and a second color light emitting device; a plurality of third protrusions are arranged in the groove located on one side of the first color light emitting device, and a plurality of fourth protrusions are arranged in the groove located on one side of the second color light emitting device; The number of the third protrusions is greater than the number of the fourth protrusions.

15. A display device, characterized in that: The invention comprises the display panel as claimed in any one of claims 1 to 14.

Images