Display panel

Abstract

The invention provides a display panel, the display panel comprises an array substrate, an organic insulating layer, an anode, a pixel definition layer and a light emitting layer, the organic insulating layer is arranged on the array substrate, the organic insulating layer comprises a plurality of first protruding parts, a groove is arranged between the adjacent first protruding parts, the anode is arranged in the groove, the pixel definition layer is arranged on the pixel definition layer, and the light emitting layer is arranged on the pixel definition layer. The organic insulating layer is arranged on the substrate, the pixel defining layer is arranged on the organic insulating layer and comprises a plurality of second protruding parts, the second protruding parts are arranged on the outer layers of the first protruding parts, the light-emitting layer is arranged on the anode, the first protruding parts and the grooves are formed in the organic insulating layer, and the second protruding parts are formed in the pixel defining layer. The second protruding parts are arranged on the outer layers of the first protruding parts, so that the height of the interval between the adjacent grooves can be increased, the amount of ink capable of being contained in the grooves is increased, ink is prevented from overflowing from the grooves in the ink-jet printing process, and therefore the risk of color mixing can be reduced.

Description

[0001] This application is a divisional application of the original application with the application number 202411865630.5 and the original filing date of December 17, 2024, and the entire contents of the original application are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of display, in particular to a display panel. BACKGROUND

[0003] Organic Light Emitting Diodes (OLED) display technology has many advantages such as self-emission, low driving voltage, high emission efficiency, short response time, high clarity and contrast, wide viewing angle, wide temperature range of use, and can realize flexible display and large-area full-color display. It is recognized by the industry as the most potential display technology. At present, the main methods for preparing organic light emitting diode display panels are evaporation and inkjet printing. The evaporation technology for preparing large, medium and small size organic light emitting diode display panels is relatively mature compared with the inkjet printing technology, and has been used for commercial production. However, the material utilization rate of evaporation technology is low, and it is difficult to be used for preparing high-resolution display panels. The working principle of inkjet printing technology is to spray ink from a small nozzle under the control of a computer program and land on the designated position of the printing material, and finally form a pre-designed pattern. The material utilization rate of this process is higher than that of evaporation technology, and the process cycle time can be reduced by increasing the number of nozzles, which is suitable for preparing large-size organic light emitting diode display panels. At the same time, the inkjet printing process does not need to establish a vacuum chamber, and the manufacturing cost is lower.

[0004] Generally, when using the inkjet printing process to manufacture an organic light emitting diode display panel, a pixel opening needs to be formed on the pixel definition layer for defining the ink film forming area. During inkjet printing, the pixel opening will be filled with specified ink. If the amount of ink filled is too much, the ink will overflow from the pixel opening and mix with the ink in the adjacent pixel opening, resulting in color deviation and color mixing problems of the pixel light emission.

[0005] Therefore, it is necessary to provide a display panel to improve this defect. SUMMARY

[0006] Embodiments of the present application provide a display panel, which can reduce the risk of color mixing.

[0007] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, a display panel is provided, comprising: an array substrate; An organic insulating layer is disposed on the array substrate, the organic insulating layer including a plurality of first protrusions, and a groove is provided between adjacent first protrusions; The anode is disposed in the groove; A pixel definition layer is disposed on the organic insulating layer, the pixel definition layer including a plurality of second protrusions, the second protrusions being disposed on the outer layer of the first protrusions; and A light-emitting layer is disposed on the anode.

[0008] Optionally, the anode includes a main body and an inclined portion, the inclined portion being connected to the main body and arranged at an angle to the main body, the main body being disposed at the bottom of the groove, and the inclined portion being disposed on the side wall of the first protrusion.

[0009] Optionally, the second protrusion is disposed on the first protrusion and part of the anode, and the inclined portion of the anode is disposed between the sidewall of the first protrusion and the sidewall of the second protrusion.

[0010] Optionally, a plurality of anodes are arranged in a row at intervals along a first direction, and a plurality of anodes are arranged in a column at intervals along a second direction, wherein the first direction and the second direction are different; The first protrusion extends along the second direction and is disposed on both sides of each column of anodes.

[0011] Optionally, along the thickness direction of the organic insulating layer, the height of the inclined portion is less than the height of the first protrusion.

[0012] Optionally, the second protrusion includes a first sub-protrusion, the first sub-protrusion extending along the second direction, and the first sub-protrusion being disposed on both sides of each column of anodes; The first sub-protrusion is disposed on the outer layer of the first protrusion, and the inclined portion is disposed between the side wall of the first protrusion and the side wall of the first sub-protrusion.

[0013] Optionally, the second protrusion includes a plurality of second sub-protrusions, the second sub-protrusions extending along the first direction and disposed between any two adjacent rows of anodes; The second sub-protrusion is disposed on the outer layer of the first protrusion, the inclined portion is disposed between the side wall of the first protrusion and the side wall of the second sub-protrusion, and a portion of the first sub-protrusion is disposed on the outer layer of the second sub-protrusion.

[0014] Optionally, the pixel definition layer further includes a plurality of spacing portions disposed in the groove, the spacing portions being continuously disposed with the second sub-protrusion portion; The spacing portion is disposed between any two adjacent rows of anodes, along the film thickness direction of the pixel definition layer, and covers the ends of the two adjacent rows of anodes that are close to each other.

[0015] Optionally, the organic insulating layer comprises: A first organic insulating layer is disposed on the array substrate; A second organic insulating layer is disposed on the first organic insulating layer; The second organic insulating layer includes the first protrusion and the groove, and the depth of the groove is the same as the thickness of the second organic insulating layer along the film thickness direction of the second organic insulating layer.

[0016] Optionally, the organic insulating layer comprises: A first organic insulating layer is disposed on the array substrate; A second organic insulating layer is disposed on the first organic insulating layer; The second organic insulating layer includes a flat portion, a first protrusion, and a groove. The flat portion is disposed on the first organic insulating layer, and the first protrusion is disposed on the flat portion. Along the film thickness direction of the second organic insulating layer, the depth of the groove is less than the thickness of the second organic insulating layer.

[0017] In the display panel of this application embodiment, by forming a plurality of first protrusions and grooves in the organic insulating layer and forming a plurality of second protrusions in the pixel definition layer, and by setting the second protrusions on the outer layer of the first protrusions, the height of the spacing between adjacent grooves can be increased, thereby increasing the amount of ink that the grooves can hold, preventing ink from overflowing from the grooves during inkjet printing, and thus reducing the risk of color mixing.

[0018] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] To gain a more complete understanding of this application 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.

[0020] Figure 1 A schematic diagram of the film layer structure of a display panel provided for an embodiment of this application; Figure 2 A partial top view of a display panel provided for an embodiment of this application; Figure 3 A cross-sectional view of the display panel provided in an embodiment of this application along the A-A' direction; Figure 4 A cross-sectional view of a display panel provided in an embodiment of this application along the B-B' direction; Figure 5 A cross-sectional view of the display panel provided in an embodiment of this application along the C-C' direction; Figure 6 A cross-sectional view of a display panel along the D-D' direction provided for an embodiment of this application; Figure 7 A schematic diagram of an organic insulating layer in a display panel provided for an embodiment of this application; Figure 8 A schematic diagram of an organic insulating layer in another display panel provided for an embodiment of this application; Figure 9 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0022] An embodiment of this application provides a display panel, which includes an array substrate, an organic insulating layer, an anode, a pixel definition layer, and a light-emitting layer. The organic insulating layer is disposed on the array substrate and includes a plurality of first protrusions. A groove is disposed between adjacent first protrusions. The anode is disposed in the groove. The pixel definition layer is disposed on the organic insulating layer and includes a plurality of second protrusions. The second protrusions are disposed on the outer layer of the first protrusions. The light-emitting layer is disposed on the anode.

[0023] In the embodiments of this application, by forming a plurality of first protrusions and grooves in the organic insulating layer and forming a plurality of second protrusions in the pixel definition layer, and by setting the second protrusions on the outer layer of the first protrusions, the height of the spacing between adjacent grooves can be increased, thereby increasing the amount of ink that the grooves can hold, preventing ink from overflowing from the grooves during inkjet printing, and thus reducing the risk of color mixing.

[0024] Please see Figure 1 , Figure 1 This is a schematic diagram of the film structure of a display panel provided in an embodiment of this application. The display panel includes an array substrate 1, an organic insulating layer 2, an anode 3, a pixel definition layer 4, and a light-emitting layer 5. The organic insulating layer 2 is disposed on the array substrate 1 and includes a plurality of first protrusions 221, with grooves 222 disposed between adjacent first protrusions 221. The anode 3 is disposed in the grooves 222. The pixel definition layer 4 is disposed on the organic insulating layer 2 and includes a plurality of second protrusions 40, which are disposed on the outer layer of the first protrusions 221. The light-emitting layer 5 is disposed on the anode 3.

[0025] In the embodiments of this application, by forming a plurality of first protrusions 221 and grooves 222 in the organic insulating layer 2, and forming a plurality of second protrusions 40 in the pixel definition layer 4, and setting the second protrusions 40 on the outer layer of the first protrusions 221, the height of the spacing between adjacent grooves 222 can be increased, thereby increasing the amount of ink that the grooves 222 can hold, preventing ink from overflowing from the grooves 222 during inkjet printing, and thus reducing the risk of ink mixing in adjacent grooves 222.

[0026] In the embodiments of this application, the pixel definition layer 4 is hydrophobic and oleophobic, which not only allows the ink sprayed on the pixel definition layer 4 to flow directly into the groove 222 along the side wall of the second protrusion 40, preventing the ink from accumulating on the second protrusion 40, but also prevents the ink in the groove 222 from overflowing along the side wall of the second protrusion 40, thereby further reducing the risk of color mixing.

[0027] In some embodiments, please refer to Figure 1 The array substrate 1 includes a substrate 11 and a driving circuit layer 12, which is disposed on the substrate 11. The driving circuit layer 12 includes a barrier layer 121, an active layer 122, a first gate insulating layer 123, a first gate 124, a second gate insulating layer 125, a second gate 126, an interlayer dielectric layer 127, a first source-drain layer 128, a passivation layer 129, a planarization layer 131, and a second source-drain layer 132, which are sequentially stacked on the substrate 11.

[0028] In practical applications, the film structure of the array substrate 1 is not limited to... Figure 1 The array substrate 1 shown has a film layer structure. The array substrate 1 can be replaced with an array substrate in a known display panel to achieve the same or similar function.

[0029] In some embodiments, please refer to Figure 1The anode 3 includes a main body 31 and an inclined portion 32. The inclined portion 32 is connected to the main body 31 and is set at an angle to the main body 31. The main body 31 is located at the bottom of the groove 222, and the inclined portion 32 is located on the side wall of the first protrusion 221.

[0030] It should be noted that after the anode 3 is formed on the organic insulating layer 2, the organic insulating layer 2 is first formed on the array substrate 1, and then the organic insulating layer 2 is etched to form a plurality of first protrusions 221 and grooves 222 located between adjacent plurality of first protrusions 221. Then the anode 3 is deposited and etched on the organic insulating layer 2. In order to ensure that the anode 3 can cover the bottom of the groove 222, the anode 3 needs to be extended to the side wall of the first protrusion 221, thereby forming an inclined portion 32 located on the side wall of the first protrusion 221. The main body 31 and the inclined portion 32 are continuously arranged, and the main body 31 and the inclined portion 32 are an integral structure.

[0031] In some embodiments, please refer to Figure 1 A via is provided on the planarization layer 131, and the main body 31 of the anode 3 is electrically connected to the second source-drain layer 132 through the via on the planarization layer 131.

[0032] In some embodiments, please refer to Figure 1 The cross-sectional shape of the groove 222 is an inverted trapezoid, and the inclined part 32 and the main body 31 are set at an obtuse angle.

[0033] In some embodiments, the inclined portion 32 is sandwiched between the sidewall of the first protrusion 221 and the sidewall of the second protrusion 40.

[0034] Please see Figure 1 After the pixel definition layer 4 is formed on the anode 3, the inclined portion 32 of the anode 3 is formed on the side wall of the first protrusion 221. After the pixel definition layer 4 is formed, the second protrusion 40 of the pixel definition layer 4 is not only disposed on the outer layer of the first protrusion 221, but also covers the inclined portion 32 located on the side wall of the first protrusion 221. The pixel definition layer 4 exposes the main body portion 31 of the anode 3.

[0035] In some embodiments, please refer to Figure 2 , Figure 2 This is a partial top view of a display panel provided in an embodiment of the present application. A plurality of anodes 3 are arranged in rows at intervals along a first direction X, and a plurality of anodes 3 are arranged in columns at intervals along a second direction Y. The first direction X and the second direction Y are different. A first protrusion 221 extends along the second direction Y and is disposed on both sides of each column of anodes 3.

[0036] In some embodiments, please refer to Figure 2The first direction X is horizontal, and the second direction Y is vertical, with the first direction X and the second direction Y perpendicular to each other. In some other embodiments, the first direction X and the second direction Y may also be set at an angle, which can be an acute angle or an obtuse angle.

[0037] In some embodiments, please refer to 1 and Figure 2 Along the thickness direction of the organic insulating layer 2, the height of the inclined portion 32 is less than the height of the first protrusion 221. This allows the first protrusion 221 to insulatingly separate the anodes 3 in adjacent grooves 222, preventing the anodes 3 in adjacent grooves 222 from overlapping and causing display abnormalities. It should be noted that the thickness direction of the organic insulating layer 2 is perpendicular to the plane defined by the first direction X and the second direction Y.

[0038] In some embodiments, please refer to Figure 2 and Figure 3 , Figure 3 A cross-sectional view of the display panel provided in the embodiment of this application along the A-A' direction. The second protrusion 40 includes a first sub-protrusion 401. The first sub-protrusion 401 extends along the second direction Y and is disposed on both sides of each column of anodes 3. The first sub-protrusion 401 is disposed on the outer layer of the first protrusion 221. A partially inclined portion 32 is disposed between the side wall of the first protrusion 221 and the side wall of the first sub-protrusion 401.

[0039] In some embodiments, please refer to Figure 2 and Figure 3 The pixel definition layer 4 includes a first pixel definition layer 41, which is disposed on the organic insulating layer 2. The first pixel definition layer 41 includes a first sub-protrusion 401, which is formed by etching the material of the first pixel definition layer 41.

[0040] In some embodiments, please refer to Figure 2 and Figure 4 and Figure 5 , Figure 4 A cross-sectional view of the display panel along the B-B' direction provided for an embodiment of this application. Figure 5A cross-sectional view of the display panel provided in the embodiments of this application along the C-C' direction shows that the second protrusion 40 includes a plurality of second sub-protrusions 402. The second sub-protrusions 402 extend along a first direction X and are disposed between any two adjacent rows of anodes 3. The second sub-protrusions 402 are disposed on the outer layer of the first protrusion 221. An inclined portion 32 is disposed between the sidewall of the first protrusion 221 and the sidewall of the second sub-protrusion 402. A portion of the first sub-protrusion 401 is disposed on the outer layer of the second sub-protrusion 402. This further increases the height of the gap between adjacent grooves 222, thereby further reducing the risk of ink mixing within adjacent grooves.

[0041] In some embodiments, please refer to Figure 1 The pixel definition layer 4 further includes a second pixel definition layer 42, which is disposed on the organic insulating layer 2. The first pixel definition layer 41 is partially disposed on the second pixel definition layer 42. The second pixel definition layer 42 includes a second sub-protrusion 402, which is formed by etching the material of the second pixel definition layer 42.

[0042] In some embodiments, please refer to Figure 2 , Figure 4 and Figure 6 , Figure 6 The cross-sectional view of the display panel provided in the embodiment of this application along the D-D' direction shows that the pixel definition layer 4 further includes a plurality of spacers 403. The spacers 403 are disposed in the groove 222 and are continuously disposed with the second sub-protrusion 402. The spacers 403 are disposed between any two adjacent rows of anodes 3, and along the film thickness direction of the pixel definition layer 4, the spacers 403 cover the ends of the two adjacent rows of anodes 3 that are close to each other.

[0043] In some embodiments, please refer to Figure 2 , Figure 4 and Figure 6 The second pixel definition layer 42 includes a second sub-protrusion 402 and a spacer 403, both of which are formed from the material of the second pixel definition layer 42 through an etching process. When forming the second pixel definition layer 42, the second sub-protrusion 402 is formed on the outer layer of the first protrusion 221, and the spacer 403 is formed in the groove 222. The second sub-protrusion 402 and the spacer 403 are alternately and continuously arranged along the first direction X, and can be considered as a single structure.

[0044] In some embodiments, please refer to Figure 1 and Figure 7 , Figure 8This is a schematic diagram of an organic insulating layer in a display panel provided in an embodiment of this application. The organic insulating layer 2 includes a first organic insulating layer 21 and a second organic insulating layer 22. The first organic insulating layer 21 is disposed on the array substrate 1, and the second organic insulating layer 22 is disposed on the first organic insulating layer 21. The second organic insulating layer 22 includes a first protrusion 221 and a groove 222. Along the film thickness direction of the second organic insulating layer 22, the depth of the groove 222 is the same as the thickness of the second organic insulating layer 22.

[0045] In some embodiments, please refer to Figure 8 , Figure 1 This is a schematic diagram of an organic insulating layer in a display panel provided for an embodiment of this application. The width of the first protrusion 221 is 10 micrometers, the height of the first sub-protrusion 401 is 3 micrometers, and the width of the first sub-protrusion 401 is 14 micrometers.

[0046] In some embodiments, please refer to Figure 8 and Figure 9 The organic insulating layer 2 includes a first organic insulating layer 21 and a second organic insulating layer 22. The first organic insulating layer 21 is disposed on the array substrate 1, and the second organic insulating layer 22 is disposed on the first organic insulating layer 21. The second organic insulating layer 22 includes a flat portion 223, a first protrusion 221, and a groove 222. The flat portion 223 is disposed on the first organic insulating layer 21, and the first protrusion 221 is disposed on the flat portion 223. Along the film thickness direction of the second organic insulating layer 22, the depth of the groove 222 is less than the thickness of the second organic insulating layer 22. In this way, the flat portion of the second organic insulating layer 22 can be retained, thereby maintaining the flatness of the organic insulating layer 2. At the same time, the height of the spacing between adjacent grooves 222 can be increased, reducing the risk of ink mixing in adjacent grooves 222.

[0047] Based on the display panel provided in the above embodiments of this application, embodiments of this application also provide a display device. Please refer to [link to relevant documentation]. Figure 9 , ​ This is a schematic diagram of the structure of a display device provided in an embodiment of this application. The display device 1000 includes a display panel 100 and a housing 200. The display panel 100 is disposed on the housing 200. The display panel 100 can be any of the display panels provided in the above embodiments. The display device provided in the embodiments of this application can achieve the same technical effects as the display panels provided in any of the above embodiments, and will not be described in detail here.

[0048] The beneficial effects of the embodiments of this application are as follows: The embodiments of this application provide a display panel and a display device. The display panel includes an array substrate, an organic insulating layer, an anode, a pixel definition layer, and a light-emitting layer. The organic insulating layer is disposed on the array substrate and includes a plurality of first protrusions. A groove is disposed between adjacent first protrusions. The anode is disposed in the groove. The pixel definition layer is disposed on the organic insulating layer and includes a plurality of second protrusions. The second protrusions are disposed on the outer layer of the first protrusions. The light-emitting layer is disposed on the anode. By forming a plurality of first protrusions and grooves in the organic insulating layer and forming a plurality of second protrusions in the pixel definition layer, and disposing the second protrusions on the outer layer of the first protrusions, the height of the spacing between adjacent grooves can be increased, thereby increasing the amount of ink that the grooves can hold and preventing ink from overflowing from the grooves during inkjet printing, thereby reducing the risk of color mixing.

[0049] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0050] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0051] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0052] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A display panel, characterized in that, include: Array substrate; An organic insulating layer is disposed on the array substrate. The organic insulating layer includes a first organic insulating layer and a second organic insulating layer disposed on the first organic insulating layer. The second organic insulating layer includes a plurality of first protrusions and a groove is provided between adjacent first protrusions. A pixel definition layer is disposed on the organic insulating layer; The second organic insulating layer includes a flat portion disposed on the first organic insulating layer, and the first protrusion is disposed on the flat portion. Along the film thickness direction of the second organic insulating layer, the depth of the groove is less than the thickness of the second organic insulating layer.

2. The display panel as described in claim 1, characterized in that, The anode includes a main body and an inclined portion. The inclined portion is connected to the main body and is set at an angle to the main body. The main body is located at the bottom of the groove, and the inclined portion is located on the side wall of the first protrusion.

3. The display panel as described in claim 2, characterized in that, The second protrusion is disposed on the first protrusion and part of the anode, and the inclined portion of the anode is disposed between the sidewall of the first protrusion and the sidewall of the second protrusion.

4. The display panel as described in claim 2, characterized in that, The plurality of anodes are arranged in a row at intervals along a first direction, and the plurality of anodes are arranged in a column at intervals along a second direction, wherein the first direction and the second direction are different; The first protrusion extends along the second direction and is disposed on both sides of each column of anodes.

5. The display panel as described in claim 2, characterized in that, Along the thickness direction of the organic insulating layer, the height of the inclined portion is less than the height of the first protrusion.

6. The display panel as described in claim 4, characterized in that, The second protrusion includes a first sub-protrusion, which extends along the second direction and is disposed on both sides of each column of anodes; The first sub-protrusion is disposed on the outer layer of the first protrusion, and the inclined portion is disposed between the side wall of the first protrusion and the side wall of the first sub-protrusion.

7. The display panel as described in claim 6, characterized in that, The second protrusion includes a plurality of second sub-protrusions, the second sub-protrusions extending along the first direction and disposed between any two adjacent rows of anodes; The second sub-protrusion is disposed on the outer layer of the first protrusion, the inclined portion is disposed between the side wall of the first protrusion and the side wall of the second sub-protrusion, and a portion of the first sub-protrusion is disposed on the outer layer of the second sub-protrusion.

8. The display panel as described in claim 7, characterized in that, The pixel definition layer further includes a plurality of spacing portions, which are disposed in the groove and are continuously disposed with the second sub-protrusion. The spacing portion is disposed between any two adjacent rows of anodes, along the film thickness direction of the pixel definition layer, and covers the ends of the two adjacent rows of anodes that are close to each other.

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