Display panel and display device

Abstract

The utility model provides a display panel and a display device. The display panel comprises a display area and a non-display area adjacent to the display area. The display panel comprises a substrate and a printing layer, the printing layer is arranged on one side of the substrate, and the printing layer comprises a plurality of first printing parts arranged in a display area and at least one second printing part arranged in a non-display area; the ratio of the distance between the first printing parts located on the edge of the display area and the adjacent second printing parts to the distance between the two adjacent first printing parts is larger than or equal to 2, so that the distance between the edge of the display area and the non-display area is increased, ink in the non-display area is prevented from overflowing to the display area in the ink-jet printing process, and the display effect is improved. The problem of color mixing at the edge of the display area is avoided, and the film forming quality and the display quality are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to a display panel and display device. BACKGROUND

[0002] Inkjet printing technology has been widely concerned in recent years due to its precise alignment, high material utilization and other advantages, and has become one of the important development directions of future large-size display device manufacturing. The raw material used in inkjet printing is liquid ink, which forms a solid film through vacuum reduced pressure drying process. Due to the difference in gas saturation vapor pressure between the periphery of the display area (Active Area, AA) and the inside of the display area, the volatile conditions during the drying process are inconsistent, which easily causes drying problems in the edge area, affecting the uniformity of the film layer, and further reducing the product yield.

[0003] In order to improve the film thickness uniformity of the display area edge in the display panel and the consistency of the device performance, the industry usually sets a virtual pixel area as a drying buffer area in the periphery of the display area. The virtual pixel area is provided with a plurality of virtual pixel units, which simulate the process environment and boundary conditions similar to the center area at the edge of the display area to alleviate the difference between the edge and the center area during the drying process, thereby improving the overall film forming quality and device consistency. However, in the actual inkjet printing process, when the ink printing amount in the virtual pixel area is large, or the dam structure (used to limit ink diffusion) formed is abnormal, it is easy to cause the virtual pixel area to "break the dam", causing the ink in the virtual pixel area to overflow to the display area, causing color mixing phenomenon, affecting product quality. SUMMARY

[0004] The embodiments of the utility model provide a display panel and display device to avoid the color mixing problem caused by the diffusion of ink in the virtual pixel area to the display area, thereby effectively improving the product yield, stability and consistency of display effect.

[0005] To achieve the above functions, the technical solutions provided by the embodiments of the utility model are as follows:

[0006] The embodiments of the utility model provide a display panel, which comprises a display area and a non-display area adjacent to the display area; the display panel comprises:

[0007] a substrate;

[0008] a printing layer provided on one side of the substrate, the printing layer comprising a plurality of first printing parts provided in the display area and at least one second printing part provided in the non-display area;

[0009] The ratio of the distance between the first printing part located at the edge of the display area and the adjacent second printing part to the distance between two adjacent first printing parts is greater than or equal to 2.

[0010] Optionally, in an embodiment, the display panel further comprises:

[0011] A first dam is located on the same side of the substrate as the printing layer, and the first dam is located at the periphery of the plurality of first printing parts.

[0012] A second dam is located on the same side of the substrate as the printing layer, and the second dam is located between two adjacent first printing parts.

[0013] The ratio of the width of the first dam to the width of the second dam is greater than or equal to 2.

[0014] Optionally, in an embodiment, the width of the first dam is greater than or equal to 24 microns and less than or equal to 28 microns, and the width of the second dam is greater than or equal to 12 microns and less than or equal to 14 microns.

[0015] Optionally, in an embodiment, the display panel further comprises a third dam located on the same side of the substrate as the printing layer, and the third dam is located between two adjacent second printing parts.

[0016] The contact angle of the third dam is greater than the contact angle of the first dam.

[0017] Optionally, in an embodiment, the material of the first dam and the material of the second dam both comprise a hydrophilic material, and the material of the third dam comprises a hydrophobic material.

[0018] Optionally, in an embodiment, the ratio of the width of the first dam to the width of the third dam is greater than or equal to 2.

[0019] Optionally, in an embodiment, the width of the third dam is greater than or equal to 12 microns and less than or equal to 14 microns.

[0020] Optionally, in an embodiment, the third dam comprises a first sub-layer and a second sub-layer arranged in layers, and the second sub-layer is located on the side of the first sub-layer away from the substrate.

[0021] The material of the second sub-layer is a hydrophobic material, and the material of the first sub-layer is a hydrophilic material.

[0022] Optionally, in an embodiment, the display panel further comprises a fourth dam located on the same side of the substrate as the printing layer, and the fourth dam is located between two adjacent first printing parts of the same light-emitting color.

[0023] The second dam is located between two adjacent first printing sections with different luminous colors;

[0024] The width of the fourth dam is smaller than the width of the second dam.

[0025] This utility model provides a display device, including the display panel described in any of the above embodiments.

[0026] The beneficial effects of this utility model embodiment are as follows: This utility model embodiment provides a display panel and a display device. The display panel includes a display area and a non-display area adjacent to the display area. The display panel includes a substrate and a printing layer. The printing layer is disposed on one side of the substrate and includes a plurality of first printing parts disposed in the display area and at least one second printing part disposed in the non-display area. By setting the distance between the first printing part located at the edge of the display area and the adjacent second printing part, the ratio of the distance between the first printing part and the distance between two adjacent first printing parts is greater than or equal to 2, thereby increasing the distance between the edge of the display area and the non-display area, suppressing the overflow of ink from the non-display area to the display area during inkjet printing, thereby avoiding the problem of color mixing at the edge of the display area and improving the film formation quality and display quality. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] To gain a more complete understanding of this utility model and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0029] Figure 1 A plan view of the display panel provided in an embodiment of this utility model;

[0030] Figure 2 Provided for the embodiments of this utility model Figure 1 Enlarged view of point A in the middle;

[0031] Figure 3 Provided for the embodiments of this utility model Figure 1 A schematic diagram of a local cross-section corresponding to BB' in the middle;

[0032] Figure 4 Provided for the embodiments of this utility model Figure 3 A schematic diagram of the local detailed structure;

[0033] Figure 5 The display device provided by the embodiment of the utility model Figure 1 The first partial cross-section view corresponding to C-C` in the embodiment of the utility model

[0034] Figure 6 The display device provided by the embodiment of the utility model Figure 1 The second partial cross-section view corresponding to C-C` in the embodiment of the utility model

[0035] Figure 7 The structure schematic view of display device provided by the embodiment of the utility model.

[0036] Mark explanation:

[0037] 1 - display panel;100 - display area;200 - non-display area;11 - substrate;12 - printing layer;14 - substrate;15 - thin film transistor layer;16 - first electrode layer;

[0038] 121 - first printing part;122 - second printing part;121A - red printing part;121B - green printing part;121C - blue printing part;131 - first dam;132 - second dam;133 - third dam;134 - fourth dam;133A - first sublayer;133B - second sublayer;141 - first substrate;142 - spacing layer;143 - second substrate;144 - buffer layer;151 - first thin film transistor;152 - second thin film transistor;151A - semiconductor layer;151B - first gate insulating layer;151C - first gate;151D - second gate insulating layer;151E - second gate;151F - interlayer insulation layer;151G - source-drain electrode;151H - first flat layer;151I - the bridge electrode;151J - second flat layer;161 - first electrode;162 - virtual electrode;

[0039] 2 - display device;21 - middle frame. Specific implementation

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application. In addition, it should be understood that the specific implementation described herein is only used to illustrate and explain the present application, and is not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower of the device in the actual use or working mode, and specifically refer to the drawing direction in the drawings. And "inner" and "outer" refer to the outline of the device.

[0041] In addition, the terms "first" and "second" are only used for description purposes, and the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more than two, unless otherwise explicitly specified and limited.

[0042] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting" and "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] The following disclosure provides many different embodiments for implementing the different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described in the following. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application provides various specific examples of processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0044] Please combine Figure 1 , Figure 2 , Figure 3 and Figure 4The embodiment provides a display panel 1, which includes but is not limited to an organic light-emitting diode display panel (OLED), and the display panel 1 includes a display area 100 and a non-display area 200 adjacent to the display area 100, wherein the display area 100 is used to present picture content, and the non-display area 200 is not used for display.

[0045] The display panel 1 includes a substrate 11 and a printing layer 12 arranged on the substrate 11, the printing layer 12 includes a plurality of first printing parts 121 arranged in the display area 100 and at least one second printing part 122 arranged in the non-display area 200; wherein the printing layer 12 can be a light-emitting functional layer, the light-emitting functional layer can contain red (R), green (G) and blue (B) organic light-emitting materials, and form a pixel array structure on the substrate 11 through an inkjet printing process, the substrate 11 can be an array substrate 11, used to carry a driving circuit and provide switching control to pixels, and the substrate 11 can include a substrate 14 and a thin film transistor layer 15 on the substrate 14, the thin film transistor layer 15 is used to drive the light-emitting functional layer to work.

[0046] Wherein the first printing part 121 can be a light-emitting pixel, and the second printing part 122 can be a dummy pixel, the light-emitting pixel has a light-emitting function and is used to realize image display of the display panel 1, and the dummy pixel does not have a light-emitting function and is used to improve ink distribution uniformity of a printing environment, improve drying consistency, enhance structural symmetry and the like, so as to improve display quality and process stability of the display panel 1.

[0047] Further, a plurality of the first printing parts 121 are arranged in a first direction X to form a light-emitting pixel row, and a plurality of the first printing parts 121 are arranged in a second direction Y to form a light-emitting pixel column, so as to form a regular two-dimensional pixel array in the display area 100; wherein the first direction X and the second direction Y are arranged in an intersecting manner.

[0048] The shape of the first printing part 121 can be strip-shaped or rectangular, and the length of the first printing part 121 in the first direction X is less than the length of the first printing part 121 in the second direction Y, so as to realize ordered arrangement of a plurality of the first printing parts 121, improve pixel arrangement density, improve ink control accuracy in an inkjet printing process, enhance optical color mixing effect, and help accurate distribution of ink droplets in a printing process, and improve film forming quality and display uniformity.

[0049] The second printing units 122 are arranged in the first direction X and in the second direction Y, and the length of the second printing units 122 in the second direction Y is greater than the length of the first printing units 121 in the second direction Y, so as to improve the stability of ink deposition and the tolerance of the printing process in the non-display area 200, avoid the problem of uneven ink diffusion caused by the edge effect of the display area 100, and improve the film forming quality and reliability of the display panel 1.

[0050] It should be noted that in the embodiment, the first direction X and the second direction Y are perpendicular to each other; the first direction can be the X direction in the coordinate system, and the second direction can be the Y direction in the coordinate system. Figure 1 Figure 1

[0051] Specifically, the first printing unit 121 can be one of a red printing unit 121A, a green printing unit 121B and a blue printing unit 121C; in the printing layer 12, the red printing unit 121A, the green printing unit 121B and the blue printing unit 121C are periodically distributed on the substrate 11 in a predetermined order, for emitting red light, green light and blue light respectively, so as to realize the color display function of the display panel 1.

[0052] The ratio of the distance D1 between the first printing unit 121 at the edge of the display area 100 and the adjacent second printing unit 122 to the distance D2 between two adjacent first printing units 121 is greater than or equal to 2, so as to increase the distance between the display area 100 and the non-display area 200, inhibit the overflow of ink from the non-display area 200 to the display area 100 in the inkjet printing process, and avoid the color mixing problem at the edge of the display area 100; at the same time, a wider physical isolation band is formed between the non-display area 200 and the display area 100, which balances the difference in drying environment between the edge of the display area 100 and the center of the display area 100, and improves the film thickness uniformity and device performance consistency, and improves the film forming quality and display quality.

[0053] ​​Further, the display panel 1 further comprises a first electrode layer 16 and a second electrode layer (not shown in the figure), the first electrode layer 16 is arranged between the substrate 11 and the printing layer 12, the first electrode layer 16 comprises a plurality of first electrodes 161 located in the display area 100 and a virtual electrode 162 located in the non-display area 200, the first printing part 121 is arranged one-to-one corresponding to the first electrode 161, and the second printing part 122 is arranged one-to-one corresponding to the virtual electrode 162; wherein the first electrode layer 16 can be an anode layer, and the first electrode 161 can be an anode; and the second electrode layer can be a cathode layer.

[0054] Specifically, the substrate 11 comprises a substrate 14, a first thin film transistor 151 and a second thin film transistor 152 arranged on the substrate 14, the first thin film transistor 151 is located in the display area 100, the second thin film transistor 152 is located in the non-display area 200, the first thin film transistor 151 is arranged corresponding to the first electrode 161, and the first electrode 161 is electrically connected to the first thin film transistor 151, the second thin film transistor 152 is arranged corresponding to the virtual electrode 162, and the virtual electrode 162 is electrically isolated from the second thin film transistor 152; wherein the substrate 11 further comprises a bridge electrode 151I arranged between the first thin film transistor 151 and the first electrode 161, and the first electrode 161 is connected to the corresponding first thin film transistor 151 through the bridge electrode 151I.

[0055] The substrate 14 comprises a first substrate 141, a spacing layer 142, a second substrate 143 and a buffer layer 144 arranged in sequence, wherein the first substrate 141 and the second substrate 143 can be rigid substrates or flexible substrates, when the first substrate 141 and the second substrate are both rigid substrates, the material can be metal or glass, when the first substrate 141 and the second substrate 143 are both flexible substrates, the material can include at least one of acrylic resin, methacrylic resin, polyisoprene, vinyl resin, epoxy-based resin, polyurethane-based resin, cellulose resin, siloxane resin, polyimide-based resin, polyamide-based resin; the material of the spacing layer 142 and the material of the buffer layer 144 both include but are not limited to silicon nitride, silicon oxide and other materials with water absorption performance, and the material of the first substrate 141, the material of the second substrate 143, the material of the spacing layer 142 and the material of the buffer layer 144 are not limited in the embodiment.

[0056] The first thin film transistor 151 includes a semiconductor layer 151A, a first gate insulating layer 151B, a first gate 151C, a second gate insulating layer 151D, a second gate 151E, an interlayer insulating layer 151F, a source-drain electrode 151G, a first planarization layer 151H, the bridge electrode 151I, and a second planarization layer 151J, which are sequentially arranged on the substrate 11. The second thin film transistor 152 has the same structure as the first thin film transistor 151, and thus the detailed description is omitted.

[0057] Please continue to combine Figures 1 to 4 In an embodiment, the display panel 1 further includes a first dam 131 and a second dam 132. The first dam 131 is arranged on the same side of the substrate 11 as the printing layer 12, and is arranged at the periphery of the plurality of first printing portions 121. The second dam 132 is arranged on the same side of the substrate 11 as the printing layer 12, and is arranged between two adjacent first printing portions 121. The ratio of the width W1 of the first dam 131 to the width W2 of the second dam 132 is greater than or equal to 2. By widening the first dam 131, a wider isolation buffer zone is formed at the periphery of the display area 100, which balances the difference in solvent evaporation rate between the edge of the display area 100 and the central region of the display area 100, thereby improving the drying uniformity of the printing ink and enhancing the consistency of the film thickness.

[0058] Specifically, during the drying process of the ink, solvent molecules change from a liquid state to a gaseous state and evaporate. By setting the ratio of the width W1 of the first dam 131 to the width W2 of the second dam 132 to be greater than or equal to 2, the solvent vapor needs to diffuse from the edge of the display area 100 to the non-display area 200 through a longer path, which slows down the rapid loss of solvent at the edge of the display area 100 through physical barrier effect, so that the local vapor pressure at the edge of the display area 100 is maintained and tends to balance with the vapor pressure in the central region of the display area 100, thereby avoiding the excessive shrinkage of the film layer at the edge of the display area 100 due to premature drying, while preventing the uneven film thickness phenomenon caused by solvent retention in the central region of the display area 100, thereby enhancing the consistency of the film thickness of the display panel 1.

[0059] Further, the first dam 131 has a width W1 greater than or equal to 24 microns and less than or equal to 28 microns, such as 24 microns, 26 microns, 28 microns, etc.; the second dam 132 has a width W2 greater than or equal to 12 microns and less than or equal to 14 microns, such as 12 microns, 13 microns, 14 microns, etc.; and the ratio of the width W1 of the first dam 131 to the width W2 of the second dam 132 is greater than or equal to 2. During the ink drying process, by controlling the ratio of the width W3 of the first dam 131 and the third dam 133, the first dam 131 provides a suitable path length for the diffusion of solvent molecules from the edge of the display area 100 to the non-display area 200, effectively slowing down the solvent evaporation rate at the edge of the display area 100, and avoiding the loss of effective area of the display panel 1 caused by the excessive width W1 of the first dam 131; at the same time, the second dam 132 ensures the physical isolation between adjacent first printing parts 121 while maintaining a moderate closed environment in the central region of the display area 100, so that the vapor pressure difference between the edge of the display area 100 and the central region of the display area 100 is balanced.

[0060] Please continue to combine Figures 1 to 4 In an embodiment, the display panel 1 further comprises a third dam 133 on the same side of the substrate 11 as the printing layer 12, the third dam 133 being arranged between two adjacent second printing parts 122; wherein the contact angle of the third dam 133 is greater than the contact angle of the first dam 131, so that the hydrophobicity of the printing layer 12 at the third dam 133 is stronger, enhancing the blocking ability of the ink diffusion path in the non-display area 200, thereby preventing the lateral diffusion of ink in the non-display area 200 during the drying process, avoiding the problem of uneven film caused by the mutual penetration of ink in the non-display area 200 (ink diffusing to adjacent areas); at the same time, reducing the risk of ink overflow from the non-display area 200 to the display area 100, thereby improving the ink stability and overall printing accuracy of the non-display area 200.

[0061] Further, the material of the first dam 131 includes but is not limited to hydrophilic material, and the material of the second dam 132 includes but is not limited to hydrophilic material, so that the ink can be uniformly distributed in the display area 100 during the printing process; and the material of the third dam 133 includes but is not limited to hydrophobic material, thereby limiting the diffusion range of ink in the non-display area 200.

[0062] Specifically, the first dam 131 is arranged at the periphery of the plurality of first printing portions 121, and the material of the first dam 131 can be a hydrophilic material, thereby facilitating uniform spreading of ink in the display area 100; the second dam 132 is arranged between two adjacent first printing portions 121, and the material of the second dam 132 can be a hydrophilic material, thereby maintaining the ink flowability between two adjacent second dams 132 and avoiding uneven drying; wherein the material of the first dam 131 and the material of the second dam 132 each include but are not limited to one of modified polyimide, hydrophilic photoresist, or plasma-treated organic material, so as to enhance the hydrophilicity of the first dam 131 and the second dam 132 to ink, thereby forming uniform ink droplet distribution and improving film formation consistency, ensuring the thickness of each first printing portion 121 to be consistent, and improving the color uniformity and optical performance of the display panel 1.

[0063] Specifically, the first dam 131 is arranged at the periphery of the plurality of first printing portions 121 in the display area 100, and the material of the first dam 131 can be a hydrophilic material, thereby facilitating uniform spreading of ink in the display area 100; the second dam 132 is arranged between two adjacent first printing portions 121, and the material of the second dam 132 can be a hydrophilic material, thereby effectively balancing the drying rate between two adjacent first printing portions 121 by maintaining moderate ink capillary flow, and preventing film formation unevenness; wherein the material of the first dam 131 and the second dam 132 includes but is not limited to at least one of modified polyimide, hydrophilic photoresist, or oxygen plasma-treated organic polymer, and these materials have controllable hydrophilic properties through molecular structure design or surface modification, which can achieve precise ink wetting control during inkjet printing, thereby improving the uniformity of ink droplet distribution and the consistency of film formation quality.

[0064] The material of the third dam 133 can be a hydrophobic material, and the material of the third dam 133 includes but is not limited to at least one of fluorine-containing polymer, hydrophobic coating, or surface hydrophobic-treated organic material, thereby forming a high contact angle interface in the non-display area 200, effectively inhibiting the lateral diffusion of ink in the non-display area 200, improving the printing stability of the non-display area 200, and reducing the risk of ink overflow to the display area 100, thereby avoiding the color mixing problem at the edge of the display area 100.

[0065] Further, the third dam 133 is arranged between two adjacent second printing portions 122, and a ratio of the width W1 of the first dam 131 to the width W3 of the third dam 133 is greater than or equal to 2, so that the third dam 133 has sufficient hydrophobic barrier capability while keeping a small occupied space, and limits the lateral diffusion of ink in the non-display area 200; meanwhile, by controlling the ratio of the width W1 of the first dam 131 to the width W3 of the third dam 133, a stronger ink guiding capability is maintained in the display area 100, and a moderate diffusion inhibition effect is provided in the non-display area 200, so as to optimize the spreading and drying environment of ink in the edge area as a whole, and improve the edge film forming quality of the printed pattern and the yield of the display panel 1.

[0066] The width W3 of the third dam 133 can be equal to the width W2 of the second dam 132, or the width W3 of the third dam 133 can not be equal to the width W2 of the second dam 132. The width W3 of the third dam 133 is greater than or equal to 12 microns and less than or equal to 14 microns, such as 12 microns, 13 microns and 14 microns, etc. By limiting the width W3 of the third dam 133 and the material, the third dam 133 has hydrophobicity and isolation capability, and does not excessively hinder the distribution of ink in the non-display area 200, so as to maintain a relatively balanced drying environment in the non-display area 200 on the basis of effectively limiting the diffusion path of ink, further reduce the risk of ink overflowing into the display area 100, and improve the film forming consistency and product reliability of the edge area of the display panel 1.

[0067] Please refer to Figure 1 , Figure 2 and Figure 5 ; in an embodiment, the third dam 133 includes a first sub-layer 133A and a second sub-layer 133B arranged in a stack, and the second sub-layer 133B is arranged on a side of the first sub-layer 133A away from the substrate 11. The material of the first sub-layer 133A is a hydrophilic material, and the first sub-layer 133A is used for guiding the preliminary spreading of ink. The material of the second sub-layer 133B is a hydrophobic material, and the second sub-layer 133B is used for limiting the lateral diffusion of ink.

[0068] Specifically, the first sub-layer 133A can be made of modified polyimide or hydrophilic photoresist to improve the affinity of the first sub-layer 133A to ink, so as to achieve guided spreading of ink droplets; the second sub-layer 133B can be made of fluorosilane coating with low surface energy or plasma-treated hydrophobic polymer material to form an effective hydrophobic interface to inhibit the lateral migration of ink in the non-display area 200; by using a hydrophilic-hydrophobic composite structure, the spreading behavior during ink deposition is more controllable, thereby improving the stability and film formation quality of the inkjet printed pattern in the edge area, and improving the yield and display consistency of the display panel 1.

[0069] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 ; in an embodiment, the display panel 1 further comprises a fourth dam 134 located on the same side of the substrate 11 as the printing layer 12, the fourth dam 134 is located between two adjacent first printing parts 121 of the same light-emitting color; the second dam 132 is located between two adjacent first printing parts 121 of different light-emitting colors; wherein the width W4 of the fourth dam 134 is smaller than the width W2 of the second dam 132, so as to reduce the limitation on ink spreading and diffusion while ensuring ink positioning accuracy, which is conducive to improving the ink connectivity and film formation uniformity in the same light-emitting color area.

[0070] Specifically, a plurality of fourth dams 134 are arranged at intervals along the second direction Y, and the fourth dams 134 extend along the first direction X, the orthographic projection of the fourth dam 134 on the substrate 11 covers at least part of the orthographic projection of the first electrode 161 on the substrate 11, so that the fourth dam 134 can protect the first electrode 161.

[0071] A plurality of second dams 132 are arranged at intervals along the first direction X, and the second dams 132 extend along the second direction Y; wherein the orthographic projection of the second dam 132 on the substrate 11 covers the orthographic projection of the fourth dam 134 on the substrate 11, so as to more effectively prevent the invasion of oxygen and moisture, reduce the oxidation and corrosion of the first electrode 161, and prolong the service life of the display panel.

[0072] The fourth dam 134 has a smaller width W4, which can reduce the problem of discontinuity of film formation boundary caused by the fourth dam 134 blocking the same color ink; and the second dam 132 has a larger width, thereby blocking the diffusion between inks of different light-emitting colors and avoiding color mixing phenomenon, thereby improving the pattern accuracy and color purity of the display area 100 of the display panel 1.

[0073] Please combine Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7 ; the embodiment also provides a display device 2, the display device 2 includes the display panel 1 described in any of the above embodiments; wherein, the display device can also include the middle frame 21, the middle frame 21 is integrated with the display panel 1 to provide support and protection for the display panel 1.

[0074] It can be understood that the display panel 1 has been described in detail in the above embodiments, which will not be repeated here; since the display device 2 adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0075] In specific application, the display device 2 can be at least one of smart phones, tablet computers, mobile phones, video phones, e-book readers, desktop computers, laptop computers, netbooks, workstations, servers, personal digital assistants, portable media players, MP3 players, mobile medical machines, cameras, game consoles, digital cameras, car navigation devices, electronic billboards, automatic teller machines or wearable devices with display function.

[0076] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0077] The display panel and display device provided by the embodiments of the present application are described in detail above, and the principle and implementation mode of the present application are described by applying specific examples in this paper, and the description of the above embodiments is only used to help understand the technical scheme and core idea of the present application; those skilled in the art should understand that the technical scheme recorded in the above embodiments can be modified, or some technical features can be replaced; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the scope of the technical scheme of the embodiments of the present application.

Claims

1. A display panel, characterized by, The display panel comprises a display area and a non-display area adjacent to the display area; the display panel comprises: a substrate; a printing layer provided on one side of the substrate, the printing layer comprising a plurality of first printing portions provided in the display area and at least one second printing portion provided in the non-display area; wherein a spacing between the first printing portion located at an edge of the display area and the adjacent second printing portion is greater than or equal to twice a spacing between two adjacent first printing portions.

2. The display panel of claim 1, wherein, The display panel further comprises: a first dam provided on the same side of the substrate as the printing layer, the first dam being provided at a periphery of the plurality of first printing portions; a second dam provided on the same side of the substrate as the printing layer, the second dam being provided between two adjacent first printing portions; wherein a ratio of a width of the first dam to a width of the second dam is greater than or equal to 2.

3. The display panel of claim 2, wherein, The width of the first dam is greater than or equal to 24 microns and less than or equal to 28 microns, and the width of the second dam is greater than or equal to 12 microns and less than or equal to 14 microns.

4. The display panel of claim 2, wherein, The display panel further comprises a third dam provided on the same side of the substrate as the printing layer, the third dam being provided between two adjacent second printing portions; wherein a contact angle of the third dam is greater than a contact angle of the first dam.

5. The display panel of claim 4, wherein, The material of the first dam and the material of the second dam both comprise a hydrophilic material, and the material of the third dam comprises a hydrophobic material.

6. The display panel of claim 4, wherein, The ratio of the width of the first dam to the width of the third dam is greater than or equal to 2.

7. The display panel of claim 6, wherein, The width of the third dam is greater than or equal to 12 microns and less than or equal to 14 microns.

8. The display panel of claim 4, wherein, The third dam comprises a first sub-layer and a second sub-layer stacked, the second sub-layer being provided on a side of the first sub-layer away from the substrate; wherein the material of the second sub-layer is a hydrophobic material, and the material of the first sub-layer is a hydrophilic material.

9. The display panel of claim 2, wherein, The display panel further comprises a fourth dam provided on the same side of the substrate as the printing layer, the fourth dam being provided between two adjacent first printing portions of the same light-emitting color; The second dam is provided between two adjacent first printing portions of different light-emitting colors; wherein the width of the fourth dam is less than the width of the second dam.

10. A display device, characterized by comprising: The display panel comprises any one of claims 1 to 9.

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