Display panel and display device

Abstract

The utility model discloses a display panel and a display device. The display panel comprises a display area and a frame area which at least partially surrounds the display area, the display panel further comprises at least two packaging layers, the packaging layers are located in the frame area and surround the display area, the packaging layers are arranged in the frame area in the first direction, and a gap exists between every two adjacent packaging layers; wherein the first direction is the direction pointing to the display area from the frame area. According to the display panel, when the packaging layer on the outer side of the frame area cracks or falls off in a small area, the path of water vapor invasion is prolonged through the gap, display abnormity of the display panel caused by water vapor invasion is reduced, and therefore the purposes of improving the reliability of the display panel and prolonging the service life of the display panel are achieved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] In recent years, organic light emitting diode (OLED) displays have attracted great attention due to their excellent color vividness and high contrast.

[0003] However, the OLED raw materials in OLED displays are susceptible to moisture and can fail. Therefore, the moisture barrier performance of the packaging directly impacts the lifespan of the OLED display, which in turn affects reliability and customer experience. Currently, the mainstream OLED display packaging technology is Frit (glass glue) packaging, which offers excellent water and oxygen barrier capabilities and a simple manufacturing process. However, existing Frit packaging methods, when the Frit glue ages, cracks, or even peels off in small areas, can lead to moisture intrusion, shortening the display's lifespan. Utility Model Content

[0004] The utility model provides a display panel and a display device, so as to improve the water-blocking capability of the display panel and prolong the service life of the display screen.

[0005] In a first aspect, an embodiment of the present invention provides a display panel, comprising a display area and a frame area at least partially surrounding the display area, and further comprising:

[0006] At least two encapsulation layers are located in the frame area and are arranged around the display area. At least two encapsulation layers are arranged in the frame area along a first direction, and there are gaps between adjacent encapsulation layers; wherein the first direction is a direction from the frame area to the display area.

[0007] Optionally, when the encapsulation layer extends in the border area on one side of the display area, the angle between the extension direction of the first side surface of at least one layer of the encapsulation layer and the extension direction of the adjacent edge of the display area is 0; wherein, the first side surface is the side surface of the encapsulation layer adjacent to another encapsulation layer.

[0008] Optionally, when the encapsulation layer extends in the frame area on one side of the display area, along the extension direction of the encapsulation layer, the first side surface includes at least two sub-surfaces, and at least two of the sub-surfaces have different extension directions.

[0009] Optionally, when the encapsulation layer extends in the frame area on one side of the display area, on a straight line in the first direction, along the extension direction of the encapsulation layer, the extension directions of the first side surfaces of at least two layers of the encapsulation layer are the same or different.

[0010] Optionally, the first side surface of at least one of the encapsulation layers is serrated.

[0011] Optionally, the first side surface of at least one of the encapsulation layers is wavy.

[0012] Optionally, the display panel further includes at least one packaging connection portion, wherein the packaging connection portion connects adjacent packaging layers.

[0013] Optionally, the packaging connection portion is made of the same material as the packaging layer.

[0014] Furthermore, it also includes a cover plate and a substrate; the packaging layer is arranged between the cover plate and the substrate.

[0015] On the other hand, an embodiment of the present invention further provides a display device, comprising the display panel described in any embodiment of the present invention.

[0016] The present invention provides a display panel and a display device. The display panel includes a display area and a frame area at least partially surrounding the display area. At least two encapsulation layers are located within the frame area and are disposed around the display area. The encapsulation layers are used to encapsulate the display panel, blocking water vapor from entering the frame area from all directions. Even if one of the at least two encapsulation layers ages, cracks, or falls off in a small area, the other encapsulation layers can still block water vapor from entering. The at least two encapsulation layers are arranged in the frame area along a first direction, with gaps between adjacent encapsulation layers. When cracks or small areas of the encapsulation layer outside the frame area fall off, the gaps extend the path for water vapor to enter, reducing display anomalies of the display panel caused by water vapor intrusion, thereby improving the reliability of the display panel and extending the service life of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A top view of a display panel provided in an embodiment of the present invention.

[0018] Figure 2 A top view of another display panel provided in an embodiment of the present invention.

[0019] Figure 3 A top view of another display panel provided in an embodiment of the present invention.

[0020] Figure 4 for Figure 1Schematic cross-sectional view of the display panel obtained by cutting it along the straight line XY.

[0021] Figure 5 A schematic structural diagram of a display device provided in an embodiment of the present utility model. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0023] Figure 1 This is a top view of a display panel provided by an embodiment of the present invention. Figure 1 The display panel includes a display area AA and a frame area AB that is at least partially arranged around the display area AA. The display panel also includes: at least two encapsulation layers 10, both of which are located in the frame area AB and are arranged around the display area AA. The at least two encapsulation layers 10 are arranged in the frame area AB along a first direction, and there is a gap 101 between adjacent encapsulation layers 10; wherein the first direction is a direction from the frame area AB to the display area AA.

[0024] Among them, such as Figure 1 As shown, the display area AA of the display panel can be the area on the display panel where the image can be displayed, and the frame area AB of the display panel can be the non-display area surrounding the display area AA on the display panel. The encapsulation layer 10 is set in the frame area AB, and the cover plate and the substrate of the display panel are bonded and encapsulated together, which does not affect the normal display in the display area AA, and encapsulates the display area AA in a closed space, blocking water and oxygen from invading the display area AA, thereby achieving the encapsulation of the display panel. Optionally, the encapsulation layer 10 is a Frit encapsulation layer. The Frit encapsulation layer has the characteristics of good water and oxygen barrier ability and simple process technology, which facilitates the formation of a multi-layer encapsulation layer 10 and improves the ability of the encapsulation layer 10 to block water vapor intrusion.

[0025] Specifically, at least two encapsulation layers 10 are located within the border area AB and surround the display area AA. Thus, the display panel is encapsulated by the encapsulation layers 10, blocking the intrusion of water vapor from all directions within the border area AB of the display panel. Furthermore, even if one of the at least two encapsulation layers 10 ages, cracks, or exhibits small area detachment, the other encapsulation layers 10 can still provide water vapor resistance. The at least two encapsulation layers 10 are arranged along a first direction within the border area AB, with gaps 101 between adjacent encapsulation layers 10, forming a vertically arranged multi-layer encapsulation layer 10 structure within the border area AB. Compared with the single-layer packaging layer structure in the prior art, the embodiment of the present invention is provided with at least two layers of packaging layers 10, so that when cracks appear or a small area of ​​the packaging layer 10 outside the frame area AB falls off, water vapor can only invade from the cracks of the outer packaging layer 10. When water vapor wants to enter the next packaging layer 10, it can only enter by moving through the cracks of the next packaging layer 10 in the gap 101, thereby extending the path of water vapor invasion. Therefore, the maze effect is utilized to extend the path of water vapor invasion through the gap 101 between the packaging layers 10 in the frame area AB, thereby reducing the display abnormalities of the display panel caused by water vapor invasion, thereby achieving the purpose of improving the reliability of the display panel and extending the service life of the display panel.

[0026] It should be noted that the glue width of the encapsulation structure formed by the at least two layers of encapsulation layers 10 and the gaps 101 between the encapsulation layers 10 in the embodiment of the present invention is the same as the glue width of the encapsulation layer in the prior art. Without affecting the glue width of the encapsulation layer, double or even multiple layers of encapsulation layers 10 are provided, thereby not expanding the width of the border area AB and affecting the display area of ​​the display area AA. For example, when the encapsulation layer 10 is three or more layers, there are two or more layers of gaps 101 between the encapsulation layers 10, which can further extend the path for water vapor intrusion, thereby further reducing the problem of display abnormalities of the display panel caused by water vapor intrusion. Therefore, by adding the encapsulation layer 10 to the border area AB without expanding the glue width of the original encapsulation layer, the purpose of extending the service life of the display panel can be further improved.

[0027] The technical solution of this embodiment provides a display panel comprising a display area and a frame area at least partially surrounding the display area, wherein at least two encapsulation layers are located within the frame area and disposed around the display area, thereby encapsulating the display panel through the encapsulation layers and blocking water vapor intrusion from all directions within the frame area of ​​the display panel. Furthermore, even if one of the at least two encapsulation layers ages, cracks, or has a small area of ​​detachment, the other encapsulation layers can still block water vapor intrusion. The at least two encapsulation layers are arranged in the frame area along a first direction, with gaps between adjacent encapsulation layers. This gap can extend the path for water vapor intrusion when cracks or a small area of ​​detachment develops on the encapsulation layer outside the frame area, thereby reducing display anomalies of the display panel caused by water vapor intrusion, thereby improving the reliability of the display panel and extending the service life of the display panel.

[0028] Continue to refer Figure 1 Furthermore, when the encapsulation layer 10 extends in the frame area AB on one side of the display area AA, the angle between the extension direction of the first side surface of at least one layer of the encapsulation layer 10 and the extension direction of the adjacent edge of the display area AA is 0; wherein the first side surface is the side surface of the encapsulation layer 10 adjacent to another encapsulation layer 10.

[0029] Specifically, the angle between the first side surface extending direction of at least one encapsulation layer 10 and the edge adjacent to the display area AA is 0. That is, the cross-sectional edge of the encapsulation layer 10 and the edge adjacent to the display area AA can be arranged parallel to each other, resulting in a linear gap 101 between the encapsulation layers 10. This allows the gap 101 to extend the path for water vapor intrusion when cracks or small areas of the encapsulation layer 10 outside the border area AB are peeled off, thereby reducing the display anomalies caused by water vapor intrusion, thereby improving the reliability of the display panel and extending its service life. Furthermore, by setting the angle between the first side surface extending direction of the encapsulation layer 10 and the edge adjacent to the display area AA to 0, the process of forming multiple encapsulation layers 10 is simplified, facilitating the formation of multiple layers of encapsulation layers 10.

[0030] Figure 2 A top view of another display panel provided by an embodiment of the present invention is shown as follows: Figure 2 As shown, further, when the encapsulation layer 10 extends in the frame area AB on one side of the display area AA, along the extension direction of the encapsulation layer 10, the first side surface includes at least two sub-surfaces, and the extension directions of at least two sub-surfaces are different.

[0031] Specifically, different sub-surfaces of the first side surface of at least one encapsulation layer 10 extend in different directions, resulting in a zigzag cross-sectional edge of the encapsulation layer 10. Adjacent encapsulation layers 10 are staggered, resulting in a zigzag gap 101 between adjacent encapsulation layers 10. Water vapor has a longer path to travel in the zigzag gap 101. Consequently, when cracks or small areas of detachment develop in the encapsulation layer 10 outside the border area AB, the zigzag gap 101 can further extend the path for water vapor intrusion, thereby further reducing the problem of display abnormalities on the display panel caused by water vapor intrusion. Optionally, the cross-sectional edge of the encapsulation layer 10 can be a regular or irregular zigzag line, which only serves to further extend the path for water vapor intrusion.

[0032] Optionally, when the encapsulation layer 10 extends in the frame area AB on one side of the display area AA, on a straight line in the first direction, along the extension direction of the encapsulation layer 10 , the extension directions of the first side surfaces of at least two layers of the encapsulation layer 10 are the same or different.

[0033] Specifically, the extension direction of the first side surface of at least two layers of the encapsulation layer 10 is the same or different, so that the cross-sectional edge of the encapsulation layer 10 is a zigzag line, and the adjacent encapsulation layers 10 are staggered with each other, so that the gap 101 between the adjacent encapsulation layers 10 is zigzag, thereby further reducing the problem of display abnormalities of the display panel caused by water vapor intrusion.

[0034] Optional, reference Figure 2 , the first side surface of at least one encapsulation layer 10 is serrated.

[0035] Specifically, the first side surface of at least one encapsulation layer 10 is serrated, so that the cross-sectional edge line of the encapsulation layer 10 is serrated, and adjacent encapsulation layers 10 are staggered with each other, so that the gap 101 between adjacent encapsulation layers 10 is serrated. The path that water vapor has to take in the serrated gap 101 is longer, and the purpose of further extending the water vapor intrusion path is achieved by the serrated gap 101, thereby further reducing the problem of display abnormalities of the display panel caused by water vapor intrusion.

[0036] Optionally, the first side surface of at least one encapsulation layer 10 is wavy.

[0037] Specifically, the first side surface of at least one encapsulation layer 10 is wavy, so that the cross-sectional edge line of the encapsulation layer 10 is a curved wavy line, and adjacent encapsulation layers 10 are staggered with each other, so that both sides of the gap 101 between adjacent encapsulation layers 10 are wavy. The path that water vapor has to take in the wavy gap 101 is longer, and the purpose of further extending the water vapor intrusion path is achieved through the wavy gap 101, thereby further reducing the problem of display abnormalities of the display panel caused by water vapor intrusion.

[0038] It should be noted that in the existing single-layer encapsulation layer structure, if one encapsulation layer detaches or cracks, water vapor can directly invade the display area through the gap. However, in the multiple-layer encapsulation layer 10 structure of the present invention, if one encapsulation layer 10 detaches or cracks, the other encapsulation layers 10 can still block water vapor. Even if water vapor detaches or cracks simultaneously, it must pass through the gaps 101 between the encapsulation layers 10. Due to the extended path, some water vapor can be intercepted in the gaps 101 between the encapsulation layers 10, preventing it from reaching the display area AA, thereby improving the reliability of the display panel and extending the service life of the display panel.

[0039] Optional, Figure 3 A top view of another display panel provided in an embodiment of the present invention is shown as follows: Figure 3 As shown, the display panel further includes at least one encapsulation connection portion 40 , and the encapsulation connection portion 40 connects adjacent encapsulation layers 10 .

[0040] Specifically, the encapsulation connection portion 40 can connect adjacent encapsulation layers 10, and multiple encapsulation connection portions 40 can be provided within the gap 101 between adjacent encapsulation layers 10. The encapsulation connection portion 40 can be a connection point, a connection line, or a connection surface, without limitation. The provision of the encapsulation connection portion 40 does not affect the original function of the gap 101 in extending the path for water vapor intrusion, but can also improve the connection strength between the encapsulation layers 10, preventing the encapsulation layers 10 from falling off due to aging, thereby extending the service life of the display panel.

[0041] Optionally, the packaging connection portion 40 is made of the same material as the packaging layer 10 .

[0042] Specifically, the packaging connection portion 40 and the packaging layer 10 are made of the same material, facilitating their integral molding, thereby improving the connection strength between them. Optionally, both the packaging connection portion 40 and the packaging layer 10 are made of Frit glue, which can be coated on glass and exhibits excellent water and oxygen barrier properties after curing. This method of packaging using Frit glue is called Frit packaging. By using Frit glue for both the packaging connection portion 40 and the packaging layer 10, the water and oxygen barrier properties of the display panel can be improved. Furthermore, the Frit glue used in the packaging layer 10 can be sintered from oxides, fillers, and binders. The oxides include at least one of vanadium oxide, phosphorus oxide, iron oxide, tellurium oxide, barium oxide, silicon oxide, boron oxide, lead oxide, and tin oxide; the fillers include ceramic powder and / or high-melting-point oxides (high-melting-point oxides are oxides with a melting point higher than the sintering temperature, which is the temperature at which the Frit glue material is sintered); and the binder is a resin.

[0043] Further, Figure 4 for Figure 1 The cross-sectional diagram of the display panel along the straight line XY is shown in FIG. Figure 4 The display panel further includes a cover plate 20 and a substrate 30 ; the encapsulation layer 10 is disposed between the cover plate 20 and the substrate 30 .

[0044] Specifically, the encapsulation layer 10 is arranged in the frame area AB between the cover plate 20 and the substrate 30, so that the cover plate 20 and the substrate 30 of the display panel can be bonded and encapsulated together, which does not affect the normal display in the display area AA, and encapsulates the light-emitting units in the display area AA in a confined space, preventing water and oxygen from invading the display area AA, thereby realizing the encapsulation of the display panel.

[0045] In addition, the encapsulation layer 10 can be formed by the following process: glass glue is made on the cover plate 20 by coating or screen printing process, the glass glue is solidified by high-temperature baking, the cover plate 20 and the substrate 30 are bonded by coating and boxing process, and the glass glue is re-melted and re-solidified, thereby forming a glass Frit encapsulation layer with excellent water and oxygen barrier effect.

[0046] The technical solution of this embodiment provides a display panel, in which at least two encapsulation layers are arranged in a first direction in a frame area, and there is a gap between adjacent encapsulation layers. When cracks appear or a small area of ​​the encapsulation layer outside the frame area falls off, the gap can extend the path for water vapor intrusion, thereby reducing display abnormalities of the display panel caused by water vapor intrusion, thereby achieving the purpose of improving the reliability of the display panel and extending the service life of the display panel.

[0047] Figure 5 This is a schematic diagram of the structure of a display device provided by an embodiment of the present utility model. Figure 5 An embodiment of the present invention further provides a display device 200 , comprising the display panel 100 in any of the above embodiments.

[0048] Specifically, the display device 200 provided in the embodiment of the present invention includes the display panel 100 proposed in any of the above embodiments, and has the beneficial effects of the display panel 100 proposed in the above embodiments, which will not be repeated here. For example, the display device 200 can be a display device such as a mobile phone, a wearable device with a display function, or a computer.

[0049] Note that the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are readily apparent to those skilled in the art without departing from the scope of protection of the present invention. Therefore, while the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the appended claims.

Claims

1. A display panel, characterized in that: The display panel includes a display area and a frame area at least partially surrounding the display area, and the display panel further includes: At least two encapsulation layers are located in the frame area and are arranged around the display area. At least two encapsulation layers are arranged in the frame area along a first direction, and there are gaps between adjacent encapsulation layers; wherein the first direction is a direction from the frame area to the display area.

2. The display panel according to claim 1, wherein: When the encapsulation layer extends in the frame area on one side of the display area, the angle between the extension direction of the first side surface of at least one layer of the encapsulation layer and the extension direction of the adjacent edge of the display area is 0; wherein, the first side surface is the side surface of the encapsulation layer adjacent to another encapsulation layer.

3. The display panel according to claim 2, wherein: When the encapsulation layer extends in the frame area on one side of the display area, along the extension direction of the encapsulation layer, the first side surface includes at least two sub-surfaces, and the extension directions of at least two of the sub-surfaces are different.

4. The display panel according to claim 3, wherein: When the encapsulation layer extends in the frame area on one side of the display area, on a straight line in the first direction, along the extension direction of the encapsulation layer, the extension directions of the first side surfaces of at least two layers of the encapsulation layer are the same or different.

5. The display panel according to claim 3 or 4, characterized in that: The first side surface of at least one of the encapsulation layers is serrated.

6. The display panel according to claim 3 or 4, characterized in that: The first side surface of at least one of the encapsulation layers is wavy.

7. The display panel according to claim 1, wherein: The system further comprises at least one package connecting portion, wherein the connecting portion connects adjacent package layers.

8. The display panel according to claim 7, wherein: The packaging connection portion is made of the same material as the packaging layer.

9. The display panel according to claim 1, wherein: Also included are a cover plate and a base plate; The packaging layer is disposed between the cover plate and the substrate.

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

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