Display panel and display device

Abstract

The application discloses a display panel and a display device. The display panel comprises a display area and an encapsulation area arranged around the display area, and comprises a first substrate and a second substrate arranged oppositely and a plurality of Tesla valve channels, at least one of the first substrate and the second substrate having an organic material layer; the plurality of Tesla valve channels are located in the encapsulation area, and at least part of the Tesla valve channels are arranged in one organic material layer in the plurality of Tesla valve channels; the Tesla valve channel comprises a first port and a second port, the first port is closer to the center of the display panel than the second port, and the Tesla valve channel unidirectionally conducts from the first port to the second port. According to the display panel and the display device, external water vapor can be reduced or avoided from entering the display panel, and the light emitting performance and service life of the display panel are improved.

Description

Technical Field

[0001] This application belongs to the field of display technology, and in particular relates to a display panel and a display device. Background Technology

[0002] In existing display panels, different materials are used to prepare sequentially arranged layer structures. Due to the different materials used, the different layer structures have different abilities to block external moisture. Moisture can enter the display panel through some of the highly absorbent layer structures. The moisture, oxygen, and other substances in the moisture will affect the luminous performance and lifespan of the display panel. Summary of the Invention

[0003] This application provides a display panel and a display device that can reduce or prevent external moisture from entering the display panel, thereby improving the luminous performance and lifespan of the display panel.

[0004] A first aspect of this application provides a display panel, including a display area and an encapsulation area disposed around the display area. The display panel includes:

[0005] A first substrate and a second substrate disposed opposite to each other, at least one of the first substrate and the second substrate having an organic material layer;

[0006] Multiple Tesla valve channels are located in the encapsulation area. At least some of the Tesla valve channels are disposed within an organic material layer. Each Tesla valve channel includes a first port and a second port. The first port is closer to the center of the display panel than the second port. The Tesla valve channel is unidirectionally conductive from the first port to the second port.

[0007] According to an embodiment of the first aspect of this application, the first substrate includes:

[0008] First substrate;

[0009] The first metal layer is located on the side of the first substrate closer to the second substrate;

[0010] A first planarization layer is disposed on the side of the first metal layer opposite to the first substrate. The first planarization layer is an organic material layer, and the Tesla valve channel is disposed within the first planarization layer.

[0011] According to any of the foregoing embodiments of the first aspect of this application, the orthographic projection of the first metal layer on the first planarization layer is spaced apart from the Tesla valve channel located within the first planarization layer.

[0012] According to any of the foregoing embodiments of the first aspect of this application, the first substrate includes:

[0013] First substrate;

[0014] The first electrode layer is located on the side of the first substrate closer to the second substrate.

[0015] A passivation layer is disposed on the side of the first electrode layer away from the first substrate, and some of the Tesla valve channels are disposed within the passivation layer.

[0016] According to any of the foregoing embodiments of the first aspect of this application, the orthographic projection of the first electrode layer on the passivation layer is spaced apart from the Tesla valve channel located within the passivation layer.

[0017] According to any of the foregoing embodiments of the first aspect of this application, the first substrate further includes:

[0018] The first metal layer is located on the side of the first substrate closer to the second substrate;

[0019] A first planarization layer is disposed on the side of the first metal layer away from the first substrate. The first planarization layer has a first opening located in the packaging region. The passivation layer includes a main body portion located on the side of the first planarization layer away from the first substrate and an edge portion disposed within the first opening. A portion of the multiple Tesla valve channels is disposed within the edge portion.

[0020] According to any of the foregoing embodiments of the first aspect of this application, the second substrate includes:

[0021] Second substrate;

[0022] A color resist layer is located on the side of the second substrate closest to the first substrate;

[0023] The second planarization layer is located on the side of the color resist layer opposite to the second substrate. The second planarization layer is an organic material layer, and the Tesla valve channel is disposed within the second planarization layer.

[0024] According to any of the foregoing embodiments of the first aspect of this application, the color resist layer includes a plurality of spaced color resist units, the projections of the color resist units on the second planarization layer being spaced apart from the Tesla valve channels located within the second planarization layer.

[0025] According to any of the foregoing embodiments of the first aspect of this application, the display panel further includes a sealing layer sandwiched between the first substrate and the second substrate, the sealing layer being located in the encapsulation area;

[0026] The first substrate has a second opening at one end facing the second substrate, and / or the second substrate has a second opening at one end facing the first substrate, and a sealing layer is inserted into the second opening, wherein the Tesla valve channel is located on the side of the second opening away from the display area.

[0027] According to any of the foregoing embodiments of the first aspect of this application, the encapsulation region includes a flat region and a corner region connecting adjacent flat regions, and the Tesla valve channel is located in the corner region.

[0028] According to any of the foregoing embodiments of the first aspect of this application, the Tesla valve channel includes a plurality of circulation units, the plurality of Tesla valve channels are arranged at intervals around the display area, the encapsulation area includes a flat area and a corner area connecting adjacent flat areas, the number of circulation units in the Tesla valve channel is the number of circulations; the number of circulations of the Tesla valve channel located in the corner area is greater than the number of circulations of the Tesla valve channel located in the flat area.

[0029] According to any of the foregoing embodiments of the first aspect of this application, the encapsulation region includes a first region and a second region, with the width direction extending from the center of the display panel to the edge of the display panel. The width of the first region along the width direction is smaller than the width of the second region along the width direction. The Tesla valve channel is located in the first region.

[0030] A second aspect of this application provides a display device, which includes the display panel provided in the first aspect.

[0031] The display panel of this application embodiment improves the light emission performance and lifespan of the display panel by providing a unidirectional Tesla valve channel in at least one organic material layer, so that water vapor entering the organic material layer can be discharged from the second port through the Tesla valve channel, while external gas or liquid cannot enter the organic material layer from the first port through the Tesla valve channel; and by setting the Tesla valve channel in the encapsulation area, the Tesla valve channel is avoided from affecting the light emission display of the display area. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the planar structure of a display panel according to an embodiment of the first aspect of this application;

[0034] Figure 2 This is a partial cross-sectional structural diagram of a display panel according to an embodiment of the first aspect of this application;

[0035] Figure 3 This is a schematic diagram of the structure of a Tesla valve channel according to an embodiment of the first aspect of this application;

[0036] Figure 4 This is a partial cross-sectional structural diagram of a display panel according to an embodiment of the first aspect of this application;

[0037] Figure 5 This is a partial cross-sectional structural diagram of a display panel according to an embodiment of the first aspect of this application;

[0038] Figure 6 This is a partial cross-sectional structural diagram of a display panel according to an embodiment of the first aspect of this application;

[0039] Figure 7 This is a partial cross-sectional structural diagram of a display panel according to an embodiment of the first aspect of this application;

[0040] Figure 8 This is a schematic diagram of the planar structure of a display panel according to an embodiment of the first aspect of this application;

[0041] Figure 9 A schematic diagram of the structure of a loop unit according to a first aspect of this application.

[0042] Figure 10 This is a schematic diagram of the planar structure of a display panel according to an embodiment of the first aspect of this application;

[0043] Figure 11 This is a schematic diagram of the planar structure of a display panel according to an embodiment of the first aspect of this application.

[0044] Figure label:

[0045] 100. Display panel; AA, display area PA, encapsulation area;

[0046] 1. First substrate; 11. First substrate; 12. First metal layer; 13. First planarization layer; 131. First opening; 14. Buffer layer; 15. Gate insulating layer; 16. Interlayer dielectric layer; 17. Second metal layer; 18. First electrode layer; 19. Passivation layer; 191. Main body portion; 192. Edge portion; 193. Second opening; 20. Second electrode layer; 121. Source / drain metal layer; 122. Active layer; 123. Gate metal layer; 2. Second substrate; 21. Second substrate; 22. Second planarization layer; 3. Tesla valve channel; 31. First port; 32. Second port; 33. Circulation unit; 331. Main channel; 332. Branch channel; 4. Liquid crystal layer; 5. Color resist layer; 51. Color resist unit; 52. Black matrix; 6. Sealing layer; 61. Flat area; 62. Corner area; 71. First region; 72. Second region. Detailed Implementation

[0047] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are intended only to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples. In the drawings and the following description, at least some well-known structures and technologies are not shown in order to avoid causing unnecessary ambiguity to this application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0048] It should be noted that, unless otherwise stated, "a plurality of" in this document means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0049] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the embodiments of this application. In the description of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. It should be understood that when describing the structure of a component, when a layer or region is referred to as being "above" or "on top of" another layer or region, it can mean that it is directly above another layer or region, or that other layers or regions are included between it and another layer or region. Furthermore, if the component is flipped, the layer or region will be located "below" or "under" another layer or region. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0050] To address the aforementioned issues, embodiments of this application provide a display panel and a display device.

[0051] Please refer to the reference. Figure 1 and Figure 2 The first aspect of this application provides a display panel 100, which includes a display area AA and an encapsulation area PA disposed around the display area AA. The display panel 100 includes a first substrate 1 and a second substrate 2 disposed opposite to each other, and a plurality of Tesla valve channels 3. At least one of the first substrate 1 and the second substrate 2 has an organic material layer. The plurality of Tesla valve channels 3 are located in the encapsulation area PA. At least a portion of the Tesla valve channels 3 are disposed within an organic material layer. The Tesla valve channel 3 includes a first port 31 and a second port 32. The first port 31 is closer to the center of the display panel 100 than the second port 32. The Tesla valve channel 3 is unidirectionally conductive from the first port 31 to the second port 32.

[0052] The display panel 100 also includes a display unit layer disposed between the first substrate 1 and the second substrate 2. The display unit layer can display images based on liquid crystal, organic light-emitting diode (OLED), micro light-emitting diode (Micro-LED), or quantum light-emitting diode (QLED).

[0053] For example, the display unit layer is based on liquid crystal to realize image display. The display unit layer includes a liquid crystal layer 4 disposed between the first substrate 1 and the second substrate 2, and the liquid crystal layer 4 includes a plurality of liquid crystal molecules.

[0054] For example, the display unit layer is based on OLED, Micro-LED or QLED to realize the image display. The display unit layer includes a plurality of light-emitting units disposed between the first substrate 1 and the second substrate 2.

[0055] The liquid crystal layer 4 or light-emitting units in the display unit layer are at least disposed in the display area AA, which is used to display images. The display panel 100 may further include a sealing layer 6 disposed between the first substrate 1 and the second substrate 2. The sealing layer 6 is at least located in the encapsulation area PA and surrounds the display unit layer to seal the first substrate 1 and the second substrate 2, preventing the liquid crystal layer 4 or multiple light-emitting units from contacting the outside air. The sealing layer 6 may be a sealant, with its opposite ends sealed to the first substrate 1 and the second substrate 2, respectively.

[0056] Optionally, the first substrate 1 is an array substrate, and the second substrate 2 is a color filter substrate. The array substrate contains a pixel driving circuit, which includes conductive structures such as thin-film transistors (TFTs) and data lines. The specific film structure of the array substrate can be found in related technologies. The color filter substrate includes a black matrix, a color resist layer, etc., and its specific film structure can be found in related technologies.

[0057] Optionally, the first substrate 1 is an array substrate, and the second substrate 2 is a cover plate. Compared with the color filter substrate, the cover plate can protect the display panel 100 from external damage, but it does not have a light filtering function.

[0058] At least one of the first substrate 1 and the second substrate 2 has an organic material layer. In some embodiments, the first substrate 1 has an organic material layer, and the second substrate 2 does not have an organic material layer. In other embodiments, the first substrate 1 does not have an organic material layer, and the second substrate 2 has an organic material layer. In still other embodiments, both the first substrate 1 and the second substrate 2 have organic material layers. The organic material layer is a layer structure made wholly or partially of organic materials.

[0059] The Tesla valve channel 3 is a passive unidirectional flow channel with a fixed geometry, allowing fluid to flow in one direction. Due to the inertia of fluid flow, the flow resistance generated by the Tesla valve channel 3 varies when the fluid passes through it in different directions, thus achieving unidirectional flow. In this application, the fluid can flow in the direction shown in the image. Figure 3The flow direction indicated by the dashed arrow is in the Tesla valve channel 3. The Tesla valve channel 3 is unidirectionally open from the first port 31 to the second port 32. Fluid can pass through the Tesla valve channel 3 from the center of the display panel 100 towards the edge of the display panel 100, but cannot pass through the Tesla valve channel 3 from the edge of the display panel 100 towards the center of the display panel 100. The fluid flowing through the Tesla valve channel 3 can be gas or liquid.

[0060] In this application, multiple Tesla valve channels 3 can be disposed in only one organic material layer, or multiple Tesla valve channels 3 can be disposed in multiple organic material layers. An organic material layer can have only one Tesla valve channel 3, or multiple Tesla valve channels 3 can be disposed in one organic material layer. Specifically, the organic material layer can be a planarization layer with planarization function, an encapsulation layer with encapsulation function, etc., in the display panel 100. Those skilled in the art can select one or more organic material layers in the display panel to house the Tesla valve channels 3 as needed.

[0061] In this application, by providing a unidirectional Tesla valve channel 3 in at least one organic material layer, water vapor entering the organic material layer can be discharged from the second port 32 through the Tesla valve channel 3, while external gas or liquid cannot enter the organic material layer from the first port 31 through the Tesla valve channel 3, thereby improving the light emission performance and service life of the display panel 100; by setting the Tesla valve channel 3 in the encapsulation area PA, the Tesla valve channel 3 is prevented from affecting the light emission display of the display area AA.

[0062] In some embodiments, the first substrate 1 includes a first substrate 11, a first metal layer 12 and a first planarization layer 13. The first metal layer 12 is located on the side of the first substrate 11 close to the second substrate 2. The first planarization layer 13 is disposed on the side of the first metal layer 12 away from the first substrate 11. The first planarization layer 13 is an organic material layer, and the Tesla valve channel 3 is disposed in the first planarization layer 13.

[0063] The first substrate 11 provides support for the first metal layer 12 and the first planarization layer 13. The first substrate 11 can be a silicon substrate, or it can be a flexible substrate, such as polyimide. The first planarization layer 13 (PLN) can planarize the first metal layer 12, which facilitates the fabrication of other layer structures on the side of the first planarization layer 13 opposite to the first metal layer 12. The material of the first planarization layer 13 can be at least one selected from acrylic resins, polyethylene glycol resins, chloromethyl resins, polybenzyloxybenzyl alcohol resins, and polystyrene resins.

[0064] The first planarization layer 13 is an organic material layer, which makes the first planarization layer 13 highly absorbent. By making a Tesla valve channel 3 on the first planarization layer 13, the water vapor entering the organic material layer can be discharged outside the display panel 100 through the first port 31 of the Tesla valve channel 3, so as to reduce or prevent water vapor from entering the display unit layer through the first planarization layer 13.

[0065] The first metal layer 12 may include high-voltage power supply signal lines, low-voltage power supply signal lines, and reset signal lines, etc. The first metal layer 12 may also include source and drain metal layers of a thin-film transistor. The first substrate 1 may further include a buffer layer 14, a gate insulator (GI), and an interlayer dielectric (ILD) layer sequentially disposed on the first substrate 11. The first metal layer 12 may be formed on the interlayer dielectric layer 16. Optionally, the interlayer dielectric layer 16 is formed on the gate insulator 15 and covers the second metal layer 17. The second metal layer 17 may include scan lines and metal electrodes corresponding to the first metal layer 12, with a portion of the first metal layer 12 facing the metal electrodes to form a storage capacitor.

[0066] In some embodiments, the orthographic projection of the first metal layer 12 onto the first planarization layer 13 is spaced apart from the Tesla valve channel 3 located within the first planarization layer 13.

[0067] The first planarization layer 13 can be formed on the interlayer dielectric layer 16 and cover the first metal layer 12. The orthographic projection of the first metal layer 12 on the first planarization layer 13 is spaced apart from the Tesla valve channel 3 located within the first planarization layer 13, so as to ensure that the Tesla valve channel 3 within the first planarization layer 13 does not come into contact with the first metal layer 12, thereby avoiding damage to the first metal layer 12 during the fabrication of the Tesla valve channel 3 and preventing the Tesla valve channel 3 from affecting the conductivity of the first metal layer 12.

[0068] Optionally, the first metal layer 12 includes a ground signal trace (GND), and the Tesla valve channel 3 located within the first planarization layer 13 is closer to the edge of the display panel 100 than the ground signal trace. The minimum spacing L1 between the ground signal trace and the edge of the display panel 100 is 500 μm, and the minimum spacing L2 between the second port 32 of the Tesla valve channel 3 near the first metal layer 12 and the edge of the display panel 100 is less than 500 μm.

[0069] Please see Figure 4In some embodiments, the first substrate 1 includes a first substrate 11, a first electrode layer 18 and a passivation layer 19. The first electrode layer 18 is located on the side of the first substrate 11 close to the second substrate 2, and the passivation layer 19 is disposed on the side of the first electrode layer 18 away from the first substrate 11. Some of the multiple Tesla valve channels 3 are disposed within the passivation layer 19.

[0070] The first electrode layer 18 can be disposed on the first planarization layer 13 and connected to the thin-film transistor through a via. The first electrode layer 18 can be a common electrode layer. The first substrate 1 may also include a second electrode layer 20 disposed on the side of the passivation layer 19 opposite to the first substrate 11. The second electrode layer 20 may include multiple pixel electrodes. Both the first electrode layer 18 and the second electrode layer 20 can be made of transparent materials such as ITO (indium tin oxide), IZO (indium zinc oxide), and ZnO (zinc oxide).

[0071] A passivation layer 19 can be formed on the first planarization layer 13 and cover the first electrode layer 18. The passivation layer 19 can be made of inorganic materials, such as silicon nitride. The passivation layer 19 made of inorganic materials has better density and weaker water absorption than organic material layers. Therefore, the passivation layer 19 can effectively block the diffusion of water vapor in the adjacent layer structure of the passivation layer 19. Compared with the buffer layer 14, gate insulating layer 15, interlayer dielectric layer 16 and other layer structures described above, the passivation layer 19 is closer to the display unit layer. The Tesla valve channel 3 is provided in the passivation layer 19, which can improve the discharge of water vapor from the display unit layer through the Tesla valve channel 3.

[0072] In some embodiments, the orthographic projection of the first electrode layer 18 onto the passivation layer 19 is spaced apart from the Tesla valve channel 3 located within the passivation layer 19.

[0073] The passivation layer 19 can be formed on the first planarization layer 13 and cover the first electrode layer 18. The orthographic projection of the first electrode layer 18 on the passivation layer 19 is spaced apart from the Tesla valve channel 3 located within the passivation layer 19, so as to ensure that the Tesla valve channel 3 within the passivation layer 19 does not come into contact with the first electrode layer 18, thereby avoiding damage to the first electrode layer 18 during the fabrication of the Tesla valve channel 3 and preventing the Tesla valve channel 3 from affecting the conductivity of the first electrode layer 18.

[0074] Optionally, the Tesla valve channel 3 located within the passivation layer 19 is closer to the edge of the display panel 100 than the first electrode layer 18. The minimum spacing distance L3 between the first electrode layer 18 and the edge of the display panel 100 is 1400 μm, and the minimum spacing distance L4 between the second port 32 of the Tesla valve channel 3 near the first electrode layer 18 and the edge of the display panel 100 is less than 1400 μm.

[0075] Please see Figure 5In some embodiments, the first substrate 1 further includes a first metal layer 12 and a first planarization layer 13. The first metal layer 12 is located on the side of the first substrate 11 close to the second substrate 2. The first planarization layer 13 is disposed on the side of the first metal layer 12 away from the first substrate 11. The first planarization layer 13 has a first opening 131 located in the packaging region PA. The passivation layer 19 includes a main body portion 191 located on the side of the first planarization layer 13 away from the first substrate 11 and an edge portion 192 disposed in the first opening 131. Some of the multiple Tesla valve channels 3 are disposed in the edge portion 192.

[0076] A first planar layer 13 with a first opening 131 can be formed on the interlayer dielectric layer 16. The first opening 131 can be a groove or a through-hole. Figure 5 In the illustrated embodiment, a portion of the interlayer dielectric layer 16 is exposed from the first opening 131. A passivation layer 19 covering the first planarization layer 13 is formed on the side of the interlayer dielectric layer 16 facing away from the first substrate 11. The main body 191 of the passivation layer 19 is formed on the side of the first planarization layer 13 facing away from the first substrate 11, and the edge portion 192 of the passivation layer 19 is formed on the interlayer dielectric layer 16 and located within the first opening 131.

[0077] The main body 191 and the edge portion 192 cover the first planarization layer 13 to reduce or avoid direct contact between the first planarization layer 13 and the outside air, thereby improving the water resistance of the display panel 100. By providing a portion of the Tesla valve channel 3 at the edge portion 192, it is beneficial to discharge moisture from the first planarization layer 13 through the Tesla valve channel 3.

[0078] Please see Figure 6 In some embodiments, the first substrate 1 is an array substrate based on COA (Color Filter on Array) technology. The first substrate 1 further includes a color resist layer 5, which is located between the passivation layer 19 and the first substrate 11. Optionally, the color resist layer 5 is located between the source / drain metal layer 121 and the pixel electrode 20. The color resist layer 5 may include a plurality of color resist units 51, which may be red, green, and blue color resists.

[0079] Optionally, a buffer layer 14 is formed on the first substrate 11. The buffer layer 14 can reduce the penetration of impurities through the first substrate 11 to the side of the buffer layer 14 opposite to the first substrate 11. The buffer layer 14 may include inorganic materials, such as silicon oxide, silicon nitride, silicon oxynitride, aluminum oxide, aluminum nitride, titanium oxide, or titanium nitride. The buffer layer 14 may also include organic materials, such as polyimide, polyester, or acrylic acid.

[0080] Optionally, the gate insulating layer 15 is formed on the buffer layer 14 and covers the active layer 122 of the thin-film transistor, insulating the active layer 122 from the gate metal layer 123 of the thin-film transistor. The gate insulating layer 15 can be formed using inorganic materials such as SiNx, SiO2, or Al2O3, and this application does not impose any special limitations on this.

[0081] Optionally, the interlayer dielectric layer 16 is formed on the gate insulating layer 15 and covers the second metal layer 17. The interlayer dielectric layer 16 can insulate the gate metal layer 123 and the source / drain metal layers 121. The interlayer dielectric layer 16 may include materials such as SiN. x Inorganic materials such as SiO2 are not specifically limited in this application.

[0082] Please see Figure 7 In other embodiments, the second substrate 2 includes a second substrate 21, a color resist layer 5, and a second planarization layer 22. The color resist layer 5 is located on the side of the second substrate 21 close to the first substrate 1. The second planarization layer 22 is located on the side of the color resist layer 5 away from the second substrate 21. The second planarization layer 22 is an organic material layer, and the Tesla valve channel 3 is disposed in the second planarization layer 22.

[0083] The second substrate 21 can be a cover plate to reduce or prevent damage to the display panel 100 from external forces. The color resist layer 5 can include a plurality of color resist units 51, which can be red, green, and blue color resists. The second substrate 2 can also include a black matrix 52, which is located between adjacent color resist units 51. The second planarization layer 22 covers the black matrix 52 and the color resist units 51 to planarize the color resist layer 5.

[0084] The second planarization layer 22 is an organic material layer, which makes the second planarization layer 22 highly absorbent. By making a Tesla valve channel 3 on the second planarization layer 22, water vapor entering the organic material layer can be discharged through the first port 31 of the Tesla valve channel 3, thereby reducing or preventing water vapor from entering the display unit layer through the second planarization layer 22.

[0085] Optionally, the second planarization layer 22 can be an OC (overcoat) layer. The second planarization layer 22 can also protect the second substrate 21 and the various layer structures located between the second substrate 21 and the second planarization layer 22.

[0086] In some embodiments, the color resist layer 5 includes a plurality of spaced color resist units 51, the projections of the color resist units 51 on the second planarization layer 22 being spaced apart from the Tesla valve channels 3 located within the second planarization layer 22.

[0087] The second planarization layer 22 can be formed on the color resist layer 5 and cover the color resist unit 51. The projection of the color resist unit 51 on the second planarization layer 22 is spaced apart from the Tesla valve channel 3 located in the second planarization layer 22 to ensure that the Tesla valve channel 3 in the second planarization layer 22 does not come into contact with the color resist unit 51, so as to avoid damage to the color resist unit 51 during the fabrication of the Tesla valve channel 3 and to avoid the Tesla valve channel 3 affecting the light filtering performance of the color resist unit 51.

[0088] In some embodiments, the display panel 100 further includes a sealing layer 6 sandwiched between the first substrate 1 and the second substrate 2, the sealing layer 6 being located in the encapsulation area PA; the first substrate 1 having a second opening 193 at one end facing the second substrate 2, and / or the second substrate 2 having a second opening 193 at one end facing the first substrate 1, the sealing layer 6 being inserted into the second opening 193, wherein the Tesla valve channel 3 is located on the side of the second opening 193 facing away from the display area AA.

[0089] A sealing layer 6 connects the first substrate 1 and the second substrate 2 to seal the display unit layer between the first substrate 1 and the second substrate 2. A second opening 193 is provided on the first substrate 1 and / or the second substrate 2, and the sealing layer 6 is inserted into the second opening 193 to increase the contact area between the sealing layer 6 and the first substrate 1 and / or the second substrate 2, thereby increasing the sealing performance of the sealing layer 6. By positioning the Tesla valve channel 3 on the side of the second opening 193 away from the display area AA, contact between the Tesla valve channel 3 and the sealing layer 6 is avoided, thus preventing the Tesla valve channel 3 from affecting the sealing performance of the sealing layer 6.

[0090] For example, the first substrate 1 has a second opening 193, which is disposed in the passivation layer 19. One end of the sealing layer 6 extends into the passivation layer 19, and the Tesla valve channel 3 in the passivation layer 19 is disposed on the side of the sealing layer 6 away from the display area AA.

[0091] For example, the second substrate 2 has a second opening 193, which is disposed in the second planarization layer 22. One end of the sealing layer 6 extends into the second planarization layer 22, and the Tesla valve channel 3 in the second planarization layer 22 is disposed on the side of the sealing layer 6 away from the display area AA. Optionally, the minimum spacing distance L5 from the second opening 193 to the edge of the display panel 100 is 250 μm, and the minimum spacing distance L6 from the second port 32 of the Tesla valve channel 3 near the sealing layer 6 to the edge of the display panel 100 is less than 250 μm.

[0092] Please see Figure 8 In some embodiments, the encapsulation region PA includes a flat region 61 and a corner region 62 connecting adjacent flat regions 61, and the Tesla valve channel 3 is located in the corner region 62.

[0093] Compared to the straight area 61 set along the side of the display panel 100, the corner area 62 connecting the adjacent straight areas 61 is more prone to poor preparation leading to the entry of water vapor. Therefore, setting the Tesla valve channel 3 in the corner area 62 can reduce the distribution density of the Tesla valve channel 3 on the display panel 100 and improve the water blocking and drainage function of the Tesla valve channel 3 on the display panel 100.

[0094] Please refer to the following: Figure 9 and Figure 10 In some embodiments, the Tesla valve channel 3 includes a plurality of circulation units 33, and the plurality of Tesla valve channels 3 are arranged at intervals around the display area AA. The encapsulation area PA includes a flat area 61 and a corner area 62 connecting adjacent flat areas 61. The number of circulation units 33 in the Tesla valve channel 3 is the number of circulations. The number of circulations of the Tesla valve channel 3 located in the corner area 62 is greater than the number of circulations of the Tesla valve channel 3 located in the flat area 61.

[0095] A circulation unit 33 includes a main channel 331 with openings at both ends and branch channels 332 connected to the openings at both ends of the main channel 331. The branch channels 332 are arc-shaped. Multiple circulation units 33 are interconnected, meaning that multiple main channels 331 are sequentially connected through their openings. Fluid can flow unidirectionally through the main channel 331 along the conduction direction of the Tesla valve channel 3. When fluid flows into the Tesla valve channel 3 in the opposite direction of conduction, the fluid splits into two paths at one opening of each circulation unit 33. One part flows through the main channel 331, and the other part flows through the branch channel 332. The two paths then converge at the other opening of the circulation unit 33. Because the branch channel 332 is a curved channel, the flow directions of the two converging fluids are opposite, creating significant resistance and ensuring that the Tesla valve channel 3 can only conduct in one direction. The greater the number of circulation units 33 in the Tesla valve channel 3, the stronger the Tesla valve channel 3's ability to block fluid flow in the opposite direction of conduction.

[0096] Please see Figure 11 In this application, by setting the circulation number of the Tesla valve channel 3 located in the corner region 62 to be greater than that of the Tesla valve channel 3 located in the straight region 61, the Tesla valve channel 3 located in the corner region 62 has a greater ability to block the flow of fluid in the opposite direction of the conduction direction than the Tesla valve channel 3 located in the straight region 61, thereby improving the ability of the corner region 62 to block water vapor.

[0097] Please see Figure 11In one embodiment, the encapsulation region PA includes a first region 71 and a second region 72. The direction from the center of the display panel 100 to the edge of the display panel 100 is the width direction. The width H1 of the first region 71 along the width direction is smaller than the width H2 of the second region 72 along the width direction. The Tesla valve channel 3 is located in the first region 71.

[0098] The display panel 100 has a long axis extending along a first direction X and a short axis extending along a second direction Y, wherein the first direction X and the second direction Y are perpendicular. In the first region 71 and the second region 72, one can be a region extending along the long axis and the other can be a region extending along the short axis. For a narrower region in the encapsulation area PA, the greater the possibility of moisture entering the display unit layer through that region, and the shorter the path of moisture exiting from that region to the outside. Therefore, the Tesla valve channel 3 is positioned in the narrower first region 71 to improve the display panel 100's ability to block moisture and to expel moisture.

[0099] A second aspect of this application provides a display device, which includes a display panel 100 as provided in the first aspect.

[0100] The display device has the relevant structure of the display panel 100 of the first aspect embodiment described above. It can be referred to the display panel 100 provided in the above embodiments and has all the beneficial effects of the aforementioned display panel 100. To avoid repetition, it will not be described again here.

[0101] The embodiments described above are not exhaustive, nor do they limit the invention to specific embodiments. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of this application, enabling those skilled in the art to effectively utilize this application and its modifications. It should be understood that the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and all such modifications or substitutions should be included within the scope of protection of this application.

Claims

1. A display panel, characterized in that, The display panel includes a display area and an encapsulation area surrounding the display area. A first substrate and a second substrate disposed opposite to each other, wherein at least one of the first substrate and the second substrate has an organic material layer; Multiple Tesla valve channels are located in the encapsulation area. At least a portion of the Tesla valve channels are disposed within one of the organic material layers. Each Tesla valve channel includes a first port and a second port. The first port is closer to the center of the display panel than the second port. The Tesla valve channel is unidirectionally conductive from the first port to the second port.

2. The display panel according to claim 1, characterized in that, The first substrate includes: First substrate; The first metal layer is located on the side of the first substrate closer to the second substrate; A first planarization layer is disposed on the side of the first metal layer opposite to the first substrate. The first planarization layer is the organic material layer, and the Tesla valve channel is disposed within the first planarization layer.

3. The display panel according to claim 2, characterized in that, The orthographic projection of the first metal layer onto the first planarization layer is spaced apart from the Tesla valve channel located within the first planarization layer.

4. The display panel according to claim 1, characterized in that, The first substrate includes: First substrate; The first electrode layer is located on the side of the first substrate closer to the second substrate. A passivation layer is disposed on the side of the first electrode layer opposite to the first substrate, and a portion of the plurality of Tesla valve channels are disposed within the passivation layer.

5. The display panel according to claim 4, characterized in that, The orthographic projection of the first electrode layer onto the passivation layer is spaced apart from the Tesla valve channel located within the passivation layer.

6. The display panel according to claim 4, characterized in that, The first substrate further includes: The first metal layer is located on the side of the first substrate closer to the second substrate; A first planarization layer is disposed on the side of the first metal layer opposite to the first substrate. The first planarization layer has a first opening located in the packaging region. The passivation layer includes a main body portion located on the side of the first planarization layer opposite to the first substrate and an edge portion disposed within the first opening. A portion of the plurality of Tesla valve channels is disposed within the edge portion.

7. The display panel according to claim 1, characterized in that, The second substrate includes: Second substrate; A color resist layer is located on the side of the second substrate closest to the first substrate; The second planarization layer is located on the side of the color resist layer opposite to the second substrate. The second planarization layer is the organic material layer, and the Tesla valve channel is disposed within the second planarization layer.

8. The display panel according to claim 7, characterized in that, The color resist layer includes a plurality of spaced color resist units, the projections of the color resist units on the second planarization layer being spaced apart from the Tesla valve channels located within the second planarization layer.

9. The display panel according to claim 1, characterized in that, The display panel further includes a sealing layer sandwiched between the first substrate and the second substrate, the sealing layer being located in the encapsulation area; The first substrate has a second opening at one end facing the second substrate, and / or the second substrate has a second opening at one end facing the first substrate, and the sealing layer is inserted into the second opening. The Tesla valve channel is located on the side of the second opening opposite to the display area.

10. The display panel according to claim 1, characterized in that, The encapsulation area includes a flat area and a corner area connecting adjacent flat areas, and the Tesla valve channel is located in the corner area.

11. The display panel according to claim 1, characterized in that, The Tesla valve channel includes multiple circulation units, which are spaced around the display area. The encapsulation area includes a flat area and a corner area connecting adjacent flat areas. The number of circulation units in the Tesla valve channel is the number of cycles. The number of cycles in the Tesla valve channel located in the corner area is greater than the number of cycles in the Tesla valve channel located in the straight area.

12. The display panel according to claim 1, characterized in that, The encapsulation area includes a first area and a second area. The width direction is from the center of the display panel to the edge of the display panel. The width of the first area along the width direction is smaller than the width of the second area along the width direction. The Tesla valve channel is located in the first region.

13. A display device, characterized in that, The display device includes a display panel as claimed in any one of claims 1 to 12.

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