Display panel and display device

Abstract

The present application discloses a display panel and a display device. The display panel includes a substrate, an organic encapsulation layer, a first inorganic encapsulation layer, and an identification layer. The organic encapsulation layer is located on one side of the substrate. The organic encapsulation layer includes a first flat portion having a first opening and a second flat portion located in the first opening. The light transmittance of the second flat portion is greater than that of the first flat portion. The first inorganic encapsulation layer is located on the side of the organic encapsulation layer away from the substrate, and the first inorganic encapsulation layer covers at least the second flat portion. The identification layer is disposed on the side of the organic encapsulation layer close to the substrate, and the identification layer includes an identification mark, and the projection of the identification mark on the organic encapsulation layer falls into the second flat portion. According to the embodiments provided by the present application, the display panel and the display device provided by the present application improve the service life of the display panel.

Description

Technical Field

[0001] This application relates to the field of display panels, and particularly to a display panel and a display device. Background Art

[0002] During the manufacturing process of display panels, identification marks can be set on each display panel to distinguish different display panels. During the manufacturing process of each step of the display panel, information such as the serial number, manufacturing batch, and materials used of different display panels can be recorded according to the above identification marks for subsequent query.

[0003] The identification mark is often set on a certain functional layer of the display panel. In the related art, an opening is usually set on the organic encapsulation layer to expose the identification mark, so as to prevent the organic encapsulation layer from blocking the identification mark and affecting the user or the identification device from observing the identification mark. The inorganic encapsulation layer covering the organic encapsulation layer is inclined at the opening. The inclined inorganic encapsulation layer is prone to breakage, resulting in moisture in the outside world invading the organic encapsulation layer from the breakage position, corroding the components of the display panel, and affecting the service life of the display panel. Summary of the Invention

[0004] Embodiments of this application provide a display panel and a display device, aiming to improve the service life of the display panel.

[0005] An embodiment of the first aspect of this application provides a display panel, which includes:

[0006] A substrate;

[0007] An organic encapsulation layer, located on one side of the substrate. The organic encapsulation layer includes a first flat portion having a first opening and a second flat portion located at the first opening. The light transmittance of the second flat portion is greater than that of the first flat portion;

[0008] A first inorganic encapsulation layer, located on the side of the organic encapsulation layer away from the substrate. The first inorganic encapsulation layer covers at least the first flat portion;

[0009] An identification layer, disposed on the side of the organic encapsulation layer close to the substrate. The identification layer includes an identification mark, and the projection of the identification mark on the organic encapsulation layer falls into the second flat portion.

[0010] According to the implementation manner of the first aspect of this application, the display panel further includes a second inorganic encapsulation layer, and the second inorganic encapsulation layer includes:

[0011] A first encapsulation portion, disposed within the first opening. The first encapsulation portion is located on the side of the second flat portion close to the substrate;

[0012] A second encapsulation portion, connected to the first encapsulation portion and disposed around the first opening. The second encapsulation portion is located on the side of the first flat portion away from the substrate.

[0013] According to any of the foregoing embodiments of the first aspect of the present application, the second encapsulation portion overlaps with the edge of the first inorganic encapsulation layer.

[0014] According to any of the foregoing embodiments of the first aspect of the present application, the surface of the first inorganic encapsulation layer close to the substrate is connected to the surface of the second encapsulation portion far from the substrate.

[0015] According to any of the foregoing embodiments of the first aspect of the present application, the surface of the second encapsulation portion far from the substrate and the surface of the second flat portion far from the substrate are in the same plane.

[0016] According to any of the foregoing embodiments of the first aspect of the present application, the display panel further includes an adhesive layer disposed on the side of the second inorganic encapsulation layer far from the substrate. The adhesive layer has a second opening, the first inorganic encapsulation layer is disposed in the second opening, and the projection of the identification mark on the adhesive layer falls into the second opening.

[0017] According to any of the foregoing embodiments of the first aspect of the present application, the edge of the first inorganic encapsulation layer overlaps with the adhesive layer.

[0018] According to any of the foregoing embodiments of the first aspect of the present application, the display panel further includes an interlayer dielectric layer located on the side of the organic encapsulation layer close to the substrate, and the identification layer is disposed on the side of the interlayer dielectric layer close to the substrate.

[0019] According to any of the foregoing embodiments of the first aspect of the present application, the first flat portion includes a first organic layer and a second organic layer. The first organic layer is disposed on the side of the second organic layer close to the substrate. The first organic layer has a first sub-opening, and the second organic layer has a second sub-opening. The first sub-opening and the second sub-opening communicate to form a first opening.

[0020] An embodiment of the second aspect of the present application further provides a display device, including the display panel provided in any of the foregoing embodiments of the first aspect.

[0021] In the display panel and the display device provided in the embodiments of the present application, by providing the second flat portion at the first opening and providing the first inorganic encapsulation layer to cover at least the first flat portion, to a certain extent, water vapor is prevented or reduced from entering the display panel through the first opening, thereby improving the service life of the display panel; by setting the light transmittance of the second flat portion to be greater than the light transmittance of the first flat portion, to a certain extent, the recognition obstacle of the identification mark caused by the second flat portion blocking the identification mark is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] By reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings, other features, objects, and advantages of the present application will become more apparent. Among them, the same or similar reference numerals represent the same or similar features, and the drawings are not drawn to actual scale.

[0023] Figure 1 is a schematic structural diagram of a display panel provided by an embodiment of the first aspect of the present application;

[0024] Figure 2 is a schematic cross-sectional structure diagram of a display panel provided by an embodiment of the first aspect of the present application;

[0025] Figure 3 is a schematic diagram of the manufacturing process of a display panel provided by an embodiment of the first aspect of the present application;

[0026] Figure 4 is a schematic cross-sectional structure diagram of another display panel provided by an embodiment of the first aspect of the present application;

[0027] Figure 5 is a schematic cross-sectional structure diagram of another display panel provided by an embodiment of the first aspect of the present application;

[0028] Figure 6 is a schematic partial cross-sectional structure diagram of a display panel provided by an embodiment of the first aspect of the present application.

[0029] Description of reference numerals:

[0030] 100, display panel;

[0031] 1, organic encapsulation layer; 11, first flat part; 111, first organic layer; 112, second organic layer; 12, second flat part; 13, first opening; 131, first sub-opening; 132, second sub-opening; 2, first inorganic encapsulation layer; 3, second inorganic encapsulation layer; 31, first encapsulation part; 32, second encapsulation part; 41, identification mark; 5, interlayer dielectric layer; 6, adhesive layer; 61, second opening.

[0032] Detailed implementation mode

[0033] The features and exemplary embodiments of each aspect of the present application will be described in detail below. To make the objectives, technical solutions, and advantages of the present application clearer, the present 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 only configured to explain the present application and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present application by showing examples of the present application.

[0034] It should be noted that in this article, 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 actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0035] It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "above" or "over" another layer or another region, it may mean directly above the other layer or another region, or there may be other layers or regions between it and the other layer or another region. And if the component is flipped, this layer or region will be "below" or "beneath" the other layer or region.

[0036] In the process of manufacturing a display panel, identification marks can be set on each display panel to distinguish different display panels. In the manufacturing process of each step of the display panel, information such as the serial number, manufacturing batch, and materials used of different display panels can be recorded according to the above-mentioned identification marks for subsequent statistical analysis.

[0037] The identification mark is often set on a certain functional layer of the display panel. In the related art, an opening is usually provided in the organic encapsulation layer to expose the identification mark to prevent the organic encapsulation layer from blocking the identification mark and affecting the user or the identification device from observing the identification mark. The inorganic encapsulation layer covering the organic encapsulation layer is inclined at the opening, and the inclined inorganic encapsulation layer is prone to breakage, resulting in moisture in the outside world can invade the organic encapsulation layer from the breakage position, corroding the components of the display panel and affecting the service life of the display panel.

[0038] Existing solutions cannot well solve the technical problems. To solve the above problems, embodiments of the present application provide a display panel and a display device. The embodiments of the display panel and the display device will be described below with reference to the accompanying drawings.

[0039] Please refer to Figure 1 、 Figure 2 and Figure 3(a), the display panel 100 includes a substrate, an organic encapsulation layer 1, a first inorganic encapsulation layer 2, and an identification layer. The organic encapsulation layer 1 is located on one side of the substrate. The organic encapsulation layer 1 includes a first flat portion 11 having a first opening 13 and a second flat portion 12 located in the first opening 13. The light transmittance of the second flat portion 12 is greater than that of the first flat portion 11. The first inorganic encapsulation layer 2 is located on the side of the organic encapsulation layer 1 away from the substrate, and the first inorganic encapsulation layer 2 at least covers the second flat portion 12. The identification layer is disposed on the side of the organic encapsulation layer 1 close to the substrate, and the identification layer includes an identification mark 41. The projection of the identification mark 41 on the organic encapsulation layer 1 falls into the second flat portion 12.

[0040] The display panel 100 further includes a driving circuit layer and a light emitting device layer. The substrate, the driving circuit layer, the light emitting device layer, the organic encapsulation layer 1, and the first inorganic encapsulation layer 2 can be stacked along the thickness direction X of the display panel 100. The substrate can be a silicon substrate or a flexible substrate such as polyimide. The driving circuit layer and the light emitting device layer can include multiple layer structures, and each layer structure can be formed by chemical vapor deposition, evaporation, or the like. The organic encapsulation layer 1 and the first inorganic encapsulation layer 2 can be disposed on the side of the light emitting device layer away from the substrate to encapsulate the light emitting device layer. Figure 2 The direction shown by the X-axis in the figure is the thickness direction X of the display panel 100. Those skilled in the art can form each layer structure in sequence along the thickness direction X starting from the substrate.

[0041] The light emitting device layer includes multiple light emitting units, and the multiple light emitting units can be light emitting units capable of emitting light of different colors respectively. For example, it can be a red light emitting unit capable of emitting red light, a green light emitting unit capable of emitting green light, and a blue light emitting unit capable of emitting blue light. Exemplarily, in the embodiments of the present application, an organic light emitting diode (Organic Light Emitting Diode, abbreviated as OLED) can be selected to prepare each of the above light emitting units. Alternatively, the light emitting units can also be set as micro light emitting diodes (Micro Light Emitting Diode, abbreviated as Micro-LED) or quantum dot light emitting diodes (Quantum Light Emitting Diode, abbreviated as QLED).

[0042] The identification layer can be disposed on the driving circuit layer. Part or all of the identification layer is patterned to form an identification mark 41, and the identification mark 41 can be a character code, a two-dimensional code, etc. When the identification mark 41 is a two-dimensional code, the identification mark 41 uses a predetermined geometric shape to represent text and numerical information. The two-dimensional code involved in the present application can use a predetermined geometric shape to represent the serial number information, the production batch information to which the display panel 100 belongs, and so on. The user and the identification device can read or photograph the identification mark 41 through the first opening 13, so the size of the first opening 13 can be set according to the size of the identification mark 41, so that the entire identification mark 41 can be observed through the first opening 13.

[0043] Those skilled in the art can understand that in order to avoid the identification layer affecting the displayed image of the display panel 100, the identification layer, the first opening 13 and the second flat portion 12 can be disposed only in the non-display area NA. Each functional layer covering the identification mark 41 in the display panel 100 has a certain degree of shielding effect on the identification mark 41. Therefore, the first opening 13 is provided on the first flat portion 11 to avoid the first flat portion 11 shielding the identification mark 41 to a certain extent. At the same time, a second flat portion 12 with a light transmittance greater than that of the first flat portion 11 is provided in the first opening 13, so that the first inorganic encapsulation layer 2 can be supported on the first opening 13 through the second flat portion 12 to encapsulate the second flat portion 12 located in the first opening 13, to avoid external moisture from entering the display panel 100 through the second flat portion 12 to a certain extent.

[0044] The organic encapsulation layer 1 can be formed by inkjet printing, coating, etc. The material of the organic encapsulation layer 1 can be acrylic-based (for example, polymethyl methacrylate, etc.), silicone-based (for example, polymethyl monophenyl vinyl siloxane, etc.), epoxy-based (for example, epoxy resin, etc.) organic materials, etc. The organic encapsulation layer 1 can be transparent to ensure that the light emitted by the light-emitting device layer can pass through the organic encapsulation layer 1. The first flat portion 11 can be disposed not only in the non-display area NA, but also in the display area AA. The first flat portion 11 can be disposed on the side of the light-emitting device layer away from the substrate to encapsulate the light-emitting unit.

[0045] The first inorganic encapsulation layer 2 can be a non-metal oxide or a metal oxide; wherein, the non-metal oxide includes at least one of silicon nitride, silicon oxide, and silicon oxynitride, and the metal oxide includes at least one of aluminum oxide, zirconium oxide, and titanium oxide. The above-mentioned first inorganic encapsulation layer 2 can be formed by chemical vapor deposition and the like. The first inorganic encapsulation layer 2 covers at least the second flat portion 12 to isolate external moisture from entering the second flat portion 12. The first inorganic encapsulation layer 2 can also extend to the first flat portion 11 and cover the first flat portion 11, so that the first inorganic encapsulation layer 2 can also isolate external moisture from entering the first flat portion 11.

[0046] In the display panel 100 provided by the present application, by providing the second flat portion 12 at the first opening 13 and providing the first inorganic encapsulation layer 2 to cover at least the first flat portion 11, it is possible to avoid or reduce moisture from entering the display panel 100 through the first opening 13 to a certain extent, thereby increasing the service life of the display panel 100; by setting the light transmittance of the second flat portion 12 to be greater than that of the first flat portion 11, it is possible to reduce the recognition obstacle of the recognition mark 41 caused by the second flat portion 12 blocking the recognition mark 41 to a certain extent.

[0047] In some embodiments, the display panel 100 further includes a second inorganic encapsulation layer 3. The second inorganic encapsulation layer 3 includes a first encapsulation portion 31 and a second encapsulation portion 32. The first encapsulation portion 31 is disposed within the first opening 13, and the first encapsulation portion 31 is located on the side of the second flat portion 12 close to the substrate; the second encapsulation portion 32 is connected to the first encapsulation portion 31 and is disposed around the first opening 13, and the second encapsulation portion 32 is located on the side of the first flat portion 11 away from the substrate.

[0048] The second encapsulation portion 32 can extend from the first encapsulation portion 31 along the sidewall of the organic encapsulation layer 1 defining the first opening 13 and cover one end of the first opening 13 close to the substrate, thereby forming a continuous layer structure. The second inorganic encapsulation layer 3 can cover the entire first flat portion 11, so that the second inorganic encapsulation layer 3 can prevent external moisture from entering the first flat portion 11. In the case where external moisture enters the second flat portion 12 through the first inorganic encapsulation layer 2, the second inorganic encapsulation layer 3 can prevent the moisture from entering the side of the second inorganic encapsulation layer 3 close to the substrate from the second flat portion 12, so that the first inorganic encapsulation layer 2 and the second inorganic encapsulation layer 3 provide double protection for a partial region of the display panel 100.

[0049] Please refer to Figure 3 (a). When preparing the display panel 100 provided by the present application, the first flat portion 11 having the first opening 13 can be prepared first; please refer to Figure 3 (b). The second inorganic encapsulation layer 3 is formed on the first flat portion 11 by chemical vapor deposition, wherein the portion within the first opening 13 is the first encapsulation portion 31 and the portion outside the first opening 13 is the second encapsulation portion 32; please refer to Figure 3 (c). An organic material is filled within the first opening 13 to form the second flat portion 12; please refer to Figure 3 (d). The first inorganic encapsulation layer 2 is formed on the second flat portion 12 by chemical vapor deposition.

[0050] In some embodiments, the second encapsulation portion 32 overlaps with the edge of the first inorganic encapsulation layer 2. The second encapsulation portion 32 and the first inorganic encapsulation layer 2 can be prepared from different materials, or of course, the same material. When the second encapsulation portion 32 and the first inorganic encapsulation layer 2 are prepared from the same material, the overlapping interface between the second encapsulation portion 32 and the first inorganic encapsulation layer 2 has good airtightness.

[0051] By arranging the second encapsulation portion 32 to overlap with the edge of the first inorganic encapsulation layer 2, the second encapsulation portion 32 and the first inorganic encapsulation layer 2 can form a continuous structure covering the side of the organic encapsulation layer 1 away from the substrate, avoiding or reducing the entry of external moisture into the organic encapsulation layer 1 to a certain extent.

[0052] The surface of the first inorganic encapsulation layer 2 close to the substrate is connected to the surface of the second encapsulation portion 32 away from the substrate, so that the contact surface between the first inorganic encapsulation layer 2 and the second encapsulation portion 32 can have a large area, avoiding or reducing the entry of external moisture into the organic encapsulation layer 1 through the overlapping interface between the first inorganic encapsulation layer 2 and the second encapsulation portion 32 to a certain extent.

[0053] In some embodiments, the surface of the second encapsulation portion 32 away from the substrate and the surface of the second flat portion 12 away from the substrate are in the same plane. Thereby ensuring that the first inorganic encapsulation layer 2 covering the second flat portion 12 is flat, avoiding the formation of a ramped and inclined structure of the first inorganic encapsulation layer 2, and avoiding or reducing the breakage of the first inorganic encapsulation layer 2 to a certain extent.

[0054] Please refer to Figure 4 , in some embodiments, the display panel 100 further includes an adhesive layer 6. The adhesive layer 6 is disposed on the side of the second inorganic encapsulation layer 3 away from the substrate. The adhesive layer 6 has a second opening 61. The first inorganic encapsulation layer 2 is disposed in the second opening 61, and the projection of the identification mark 41 on the adhesive layer 6 falls into the second opening 61.

[0055] The adhesive layer 6 has a certain adhesiveness, and functional layers such as a touch layer and a cover plate can be disposed on the side of the first inorganic encapsulation layer 2 away from the substrate through the adhesive layer 6. The thickness of the adhesive layer 6 can be greater than or equal to the thickness of the first inorganic encapsulation layer 2 to avoid the first inorganic encapsulation layer 2 protruding from the surface of the adhesive layer 6 away from the substrate. When the thickness of the adhesive layer 6 is greater than that of the first inorganic encapsulation layer 2, the space between the functional layer disposed on the side of the adhesive layer 6 away from the substrate and the first inorganic encapsulation layer 2 can be a vacant area, that is, only the first inorganic encapsulation layer 2 can be disposed in the second opening 61.

[0056] In some embodiments, the edge of the first inorganic encapsulation layer 2 overlaps with the adhesive layer 6. The surface of the first inorganic encapsulation layer 2 close to the substrate may only contact the second flat portion 12 and the second encapsulation portion 32. Of course, the surface of the first inorganic encapsulation layer 2 close to the substrate may also extend along the sidewall of the second opening 61 defined by the adhesive layer 6, or the surface of the first inorganic encapsulation layer 2 away from the substrate may partially contact the adhesive layer 6.

[0057] In some embodiments, the display panel 100 further includes an interlayer dielectric layer 5 (inter layer dielectric, ILD). The interlayer dielectric layer 5 is located on the side of the organic encapsulation layer 1 close to the substrate, and the identification layer is disposed on the side of the interlayer dielectric layer 5 close to the substrate. The interlayer dielectric layer 5 can serve as an insulating layer between functional layers.

[0058] Please refer to Figure 5 and Figure 6 In some embodiments, the first flat portion 11 includes a first organic layer 111 and a second organic layer 112. The first organic layer 111 is disposed on the side of the second organic layer 112 close to the substrate. The first organic layer 111 has a first sub-opening 131, and the second organic layer 112 has a second sub-opening 132. The first sub-opening 131 and the second sub-opening 132 communicate with each other to form a first opening 13.

[0059] The diameter of the first sub-opening 131 may gradually increase in the direction from the substrate to the organic encapsulation layer 1, and the diameter of the second sub-opening 132 may gradually increase in the direction from the substrate to the organic encapsulation layer 1. The diameter of the end of the first sub-opening 131 away from the substrate may be smaller than the diameter of the end of the second sub-opening 132 close to the substrate. The first organic layer 111 and the second organic layer 112 are prepared in a time-sharing manner, so that the sidewalls of the first organic layer 111 defining the first sub-opening 131 and the sidewalls of the second organic layer 112 defining the second opening 61 may be stepped, that is, form sidewalls that are inclined - parallel - inclined with respect to the plane where the first organic layer 111 is located relative to the substrate, so as to reduce the included angle between the sidewalls of the first organic layer 111 defining the first sub-opening 131 and the sidewalls of the second organic layer 112 defining the second sub-opening 132 relative to the plane where the substrate is located, and reduce the possibility of the second inorganic encapsulation layer 3 extending along the sidewall being broken. The first organic layer 111 and the second organic layer 112 may be prepared from the same material or from different materials.

[0060] In a second aspect, an embodiment of the present application further provides a display device. In the display device provided in the embodiment of the present application, it has the relevant structure of the foregoing display panel 100. Refer to the display panel 100 provided in the foregoing embodiments. It has all the beneficial effects of the foregoing display panel 100, which will not be elaborated herein.

[0061] In accordance with the embodiments of the present application as described above, these embodiments do not describe all the details in detail, nor do they limit the invention to only the specific embodiments. Obviously, many modifications and variations can be made according to the above description. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can make good use of the present application and its modifications based on the present application. The present application is only limited by the claims and their full scope and equivalents.

Claims

1. A display panel, characterized in that, The display panel includes: a substrate; an organic encapsulation layer located on one side of the substrate. The organic encapsulation layer includes a first flat portion having a first opening and a second flat portion located in the first opening. The light transmittance of the second flat portion is greater than that of the first flat portion; a first inorganic encapsulation layer located on the side of the organic encapsulation layer away from the substrate. The first inorganic encapsulation layer covers at least the second flat portion; an identification layer disposed on the side of the organic encapsulation layer close to the substrate. The identification layer includes an identification mark, and the projection of the identification mark on the organic encapsulation layer falls into the second flat portion.

2. The display panel according to claim 1, wherein The display panel further includes a second inorganic encapsulation layer, and the second inorganic encapsulation layer includes: a first encapsulation portion disposed in the first opening. The first encapsulation portion is located on the side of the second flat portion close to the substrate; a second encapsulation portion connected to the first encapsulation portion and disposed around the first opening. The second encapsulation portion is located on the side of the first flat portion away from the substrate.

3. The display panel according to claim 2, wherein The second encapsulation portion overlaps with the edge of the first inorganic encapsulation layer.

4. The display panel according to claim 3, wherein The surface of the first inorganic encapsulation layer close to the substrate is connected to the surface of the second encapsulation portion away from the substrate.

5. The display panel according to claim 2, characterized in that The surface of the second encapsulation portion away from the substrate is in the same plane as the surface of the second flat portion away from the substrate.

6. The display panel according to claim 2, wherein The display panel further includes an adhesive layer disposed on the side of the second inorganic encapsulation layer away from the substrate. The adhesive layer has a second opening, and the first inorganic encapsulation layer is disposed in the second opening. The projection of the identification mark on the adhesive layer falls into the second opening.

7. The display panel according to claim 6, wherein The edge of the first inorganic encapsulation layer overlaps with the adhesive layer.

8. The display panel according to claim 4, wherein, The display panel further includes an interlayer dielectric layer located on the side of the organic encapsulation layer close to the substrate. The identification layer is disposed on the side of the interlayer dielectric layer close to the substrate.

9. The display panel according to claim 1, wherein The first flat portion includes a first organic layer and a second organic layer. The first organic layer is disposed on the side of the second organic layer close to the substrate. The first organic layer has a first sub-opening, and the second organic layer has a second sub-opening. The first sub-opening and the second sub-opening communicate with each other to form the first opening.

10. A display device, characterized in that, including: the display panel according to any one of claims 1-9.

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