Display panel and display device

Abstract

The invention relates to a display panel and a display device, the display panel comprises a flexible substrate, a fixing layer, a pixel island and a packaging layer, and the flexible substrate is provided with an opening; at least part of the fixing layer is arranged in the open hole and forms an accommodating area in a surrounding manner; the pixel islands are arranged on one side of the flexible substrate and located in the containing area, and the adjacent pixel islands are connected through wires. The packaging layer is at least arranged on the side, away from the flexible substrate, of the pixel island and is connected with the fixing layer. The embodiment of the invention provides a display panel and a display device, which can improve the stability of a packaging layer in a stretching process, so that the packaging effect has higher reliability.

Description

Technical Field

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

[0002] With the rapid development of electronic technology, electronic products are constantly being innovated. In order to enable electronic products to be applied in various fields, the characteristics of stretchability, lightness and unlimited appearance are gradually gaining attention. At present, stretchable display panels generally adopt an island bridge structure, which is provided with pixel islands including multiple pixels, and adjacent pixel islands are connected by wire bridges.

[0003] However, the packaging performance of stretchable display panels needs to be improved. Summary of the invention

[0004] Embodiments of the present invention provide a display panel and a display device, which can improve the stability of an encapsulation layer during a stretching process, so that the encapsulation effect has higher reliability.

[0005] On the one hand, according to an embodiment of the present invention, a display panel is proposed, including a flexible substrate, a fixed layer, a pixel island and an encapsulation layer, wherein an opening is provided on the flexible substrate; at least a portion of the fixed layer is provided in the opening and surrounds the opening to form a receiving area; the pixel island is provided on one side of the flexible substrate and is located in the receiving area, and adjacent pixel islands are connected by wires; the encapsulation layer is provided at least on a side of the pixel island facing away from the flexible substrate and is connected to the fixed layer.

[0006] According to one aspect of an embodiment of the present invention, at least a portion of the fixed layer is located between adjacent pixel islands;

[0007] Optionally, the orthographic projection of the fixed layer on the flexible substrate is a closed ring structure and is arranged around the pixel island;

[0008] Optionally, the orthographic projection of the opening on the flexible substrate is a closed ring structure and is arranged around the pixel island.

[0009] According to one aspect of the embodiments of the present invention, the fixing layer includes a first fixing portion and a second fixing portion connected to each other, the first fixing portion is arranged in the opening and the second fixing portion is arranged on a side of the first fixing portion close to the encapsulation layer;

[0010] Optionally, the orthographic projection of a portion of the second fixing portion on the flexible substrate is located outside the orthographic projection of the opening on the flexible substrate, and is located on a side of the flexible substrate close to the packaging layer.

[0011] According to one aspect of the embodiments of the present invention, the orthographic projection of the first fixing portion on the flexible substrate is located within the orthographic projection of the second fixing portion on the flexible substrate;

[0012] Optionally, an orthographic projection area of ​​the first fixing portion on the flexible substrate is smaller than an orthographic projection area of ​​the second fixing portion on the flexible substrate;

[0013] Optionally, a height dimension of a surface of the second fixing portion away from the flexible substrate in the thickness direction of the flexible substrate is greater than a height dimension of a surface of the pixel island away from the flexible substrate in the thickness direction of the flexible substrate.

[0014] According to one aspect of the embodiments of the present invention, the material of the fixed layer includes an inorganic material, the encapsulation layer includes an inorganic layer and an organic layer stacked, and the encapsulation layer is connected to the fixed layer through the inorganic layer;

[0015] Optionally, the inorganic layer includes a first inorganic layer and a second inorganic layer stacked in sequence in a direction away from the flexible substrate, the first inorganic layer is arranged on a side of the pixel island away from the flexible substrate, the organic layer is arranged between the first inorganic layer and the second inorganic layer, and at least one of the first inorganic layer and the second inorganic layer is connected to the fixed layer;

[0016] Optionally, the first inorganic layer covers a portion of the fixed layer and is connected to the fixed layer;

[0017] Optionally, the second inorganic layer covers the organic layer and the first inorganic layer and extends beyond the edge of the first inorganic layer to be connected to the fixed layer.

[0018] According to one aspect of an embodiment of the present invention, the flexible substrate includes a first organic substrate, an inorganic substrate, and a second organic substrate that are stacked, the inorganic substrate is arranged between the first organic substrate and the second organic substrate, the pixel island is arranged on a side of the second organic substrate away from the inorganic substrate, the opening at least passes through the second organic substrate, and the fixed layer is at least partially located in the opening and connected to the inorganic substrate.

[0019] According to one aspect of an embodiment of the present invention, the display panel further comprises a dam structure disposed between the flexible substrate and the encapsulation layer, the dam structure being disposed on a side of the fixed layer close to the pixel island, or the dam structure being disposed on a side of the fixed layer away from the flexible substrate;

[0020] Optionally, the orthographic projection of the dam structure on the flexible substrate is a closed ring structure and is arranged around the pixel island, and a surface of the dam structure facing away from the flexible substrate is higher than a surface of the pixel island facing away from the flexible substrate along the thickness direction of the flexible substrate;

[0021] Optionally, the pixel island includes an array layer, a pixel definition layer and a light-emitting unit, the array layer is arranged on the flexible substrate, the pixel definition layer is arranged on a side of the array layer away from the flexible substrate, the pixel definition layer has a plurality of pixel openings, and the plurality of light-emitting units are arranged in the pixel openings, the display panel further includes a support column, the support column is arranged on a side of the pixel definition layer away from the array layer, and a surface of the dam structure away from the flexible substrate is higher than a surface of the support column away from the flexible substrate in a thickness direction of the flexible substrate;

[0022] The dam structure includes a first part, a second part and a third part stacked in the thickness direction of the flexible substrate, the first part is arranged in the same layer as at least part of the array layer, the second part is arranged in the same layer as the pixel definition layer, and the third part is arranged in the same layer as the support column.

[0023] According to one aspect of an embodiment of the present invention, the display panel includes a reinforcement layer, which is disposed between the flexible substrate and the pixel island, and the pixel island and the dam structure are located on a side of the reinforcement layer away from the flexible substrate;

[0024] Optionally, the elastic modulus of the reinforcement layer is greater than the elastic modulus of the flexible substrate;

[0025] Optionally, the material of the reinforcement layer includes resin material.

[0026] According to one aspect of the embodiments of the present invention, a groove is provided on the flexible substrate, the groove is at least partially located between two adjacent pixel islands, and the conductive line is at least partially located on the inner wall and bottom of the groove;

[0027] Optionally, the orthographic projection of the groove on the flexible substrate is a closed ring structure and is arranged around the pixel island and the fixed layer along the circumference of the pixel island;

[0028] Optionally, there are multiple grooves, and the multiple grooves are arranged at intervals from each other;

[0029] Optionally, the flexible substrate includes a first organic substrate, an inorganic substrate, and a second organic substrate which are stacked, the inorganic substrate is arranged between the first organic substrate and the second organic substrate, the pixel island is arranged on a side of the second organic substrate away from the inorganic substrate, the groove is arranged in the second organic substrate, and the depth dimension of the groove in the thickness direction of the flexible substrate is smaller than the thickness dimension of the second organic substrate in the thickness direction of the flexible substrate;

[0030] Optionally, the wire is located between the fixed layer and the flexible substrate, and at least part of the wire is located on the inner wall and bottom of the opening;

[0031] Optionally, the groove is located on a side of the opening surrounded by the groove and / or the fixed layer away from the pixel island surrounded by the groove;

[0032] Optionally, the display panel is a stretchable display panel.

[0033] In another aspect, a display device is provided according to an embodiment of the present invention, comprising the display panel as described above.

[0034] The embodiments of the present invention provide a display panel and a display device. By arranging an opening on a flexible substrate of the display panel and arranging at least a portion of a fixed layer in the opening, the fixed layer is connected to a corresponding packaging layer on a pixel island. When the display panel is stretched, the fixed layer is at least partially filled in the opening and is clamped by the opening, so that the fixed layer and the flexible substrate can remain relatively still, ensuring that the fixed layer is always located around the pixel island, thereby enabling the packaging layer connected to the fixed layer to remain relatively still with the corresponding pixel island, preventing the packaging layer from breaking or detaching during the stretching of the screen body, playing a certain fixing role on the packaging layer, and improving the stability of the pixel island packaging. At the same time, the fixed layer can also fix the position and size of the pixel display area, preventing the pixel display area from being deformed due to the stretching and bending of the screen body, and having a more stable display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Features, advantages, and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0036] Figure 1 is a schematic plan view of a display panel according to an embodiment of the present invention;

[0037] Figure 2 is a schematic cross-sectional view of a pixel island in an embodiment of the present invention;

[0038] Figure 3 is a schematic plan view of a pixel island in an embodiment of the present invention;

[0039] Figure 4 is a cross-sectional schematic diagram of another pixel island position according to an embodiment of the present invention;

[0040] Figure 5 is a schematic plan view of another display panel according to an embodiment of the present invention;

[0041] Figure 6 is a schematic cross-sectional view of a groove position in an embodiment of the present invention;

[0042] Figure 7 It is another cross-sectional schematic diagram at the groove position of an embodiment of the present invention.

[0043] Reference numerals:

[0044] 100-display panel; Z-thickness direction;

[0045] 10-flexible substrate; 11-first organic substrate; 12-second organic substrate; 13-inorganic substrate; 14-opening; 20-fixing layer; 21-first fixing portion; 22-second fixing portion;

[0046] 30-pixel island; 31-array layer; 32-pixel definition layer; 33-light-emitting unit;

[0047] 40-encapsulation layer; 41-first inorganic layer; 42-second inorganic layer; 43-organic layer; 50-conducting wire;

[0048] 60-dam structure; 61-first part; 62-second part; 63-third part; 70-support column; 80-reinforcement layer; 90-groove.

[0049] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0050] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are proposed in order to provide a comprehensive understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least part of the known structures and technologies are not shown in order to avoid unnecessary ambiguity of the present invention; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0051] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the display panel and display device of the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0052] It should be noted that the terms "first", "second", etc. in the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0053] In the related technology, each pixel island needs to be encapsulated with a thin film encapsulation layer to prevent the external water and oxygen environment from entering the interior of the display screen. When the user continues to stretch the screen, the encapsulation layer is prone to breakage or falling off, causing encapsulation failure.

[0054] In order to solve the above technical problems, the embodiments of the present invention provide a display panel and a display device. Figures 1 to 7 The display panel and the display device according to the embodiments of the present invention are described in detail.

[0055] See also Figure 1 and Figure 2 According to an embodiment of the present invention, a display panel 100 is proposed, including a flexible substrate 10, a fixed layer 20, a pixel island 30 and an encapsulation layer 40. The flexible substrate 10 is provided with an opening 14; at least a portion of the fixed layer 20 is disposed in the opening 14 and surrounds the opening to form a receiving area; the pixel island 30 is disposed on one side of the flexible substrate 10 and is located in the receiving area, and adjacent pixel islands 30 are connected by wires 50; the encapsulation layer 40 is at least disposed on a side of the pixel island 30 away from the flexible substrate 10 and is connected to the fixed layer 20.

[0056] The pixel island 30 in the present embodiment adopts an independent packaging structure, that is, each pixel island 30 is separately packaged using a packaging layer 40, and the packaging layers 40 corresponding to each pixel island 30 are arranged at intervals from each other. In the present embodiment, it is mainly considered that during the stretching process of the screen body, the packaging layer 40 corresponding to each pixel island 30 has the risk of breaking or detaching, which eventually leads to packaging failure. Therefore, the display panel 100 structure in the present application is proposed.

[0057] For example, at least a portion of the fixed layer 20 is located between adjacent pixel islands 30. The fixed layer 20 and the pixel islands 30 are arranged correspondingly, for example, arranged one-to-one. For example, at least a portion of the opening 14 is located between adjacent pixel islands 30.

[0058] Optionally, an opening 14 can be set on the flexible substrate 10, which can be formed by an etching process. The present application does not specifically limit the depth and shape of the opening 14. It only needs to be set around the corresponding pixel island 30 to ensure that the fixed layer 20 can be set in the opening 14 to facilitate connection with the corresponding packaging layer 40.

[0059] In order to ensure that the screen can be stretched smoothly, optionally, the flexible substrate 10 needs to use flexible materials, and the pixel island 30 is arranged on the flexible substrate 10, wherein the pixel island 30 can be composed of a plurality of sub-pixels, and color display is completed after color mixing, specifically including an array driving layer and a light-emitting layer arranged on the array driving layer.

[0060] Optionally, the encapsulation layer 40 can adopt a composite structure of stacked inorganic and organic layers 43. It needs to be connected to the fixed layer 20 in the bottom opening 14 during molding. When the user stretches the screen, the encapsulation layer 40 corresponding to the pixel island 30 is connected to the fixed layer 20. The fixed layer 20 will not be displaced due to the blocking effect of the bottom opening 14, and it will be firmly stuck at the position of the opening 14, so that the fixed layer 20 and the encapsulation layer 40 connected thereto remain relatively still with the pixel island 30, thereby preventing the encapsulation layer 40 from breaking or detaching from the pixel island 30.

[0061] Optionally, multiple pixel islands 30 can be arranged in an array on the flexible substrate 10, and adjacent pixel islands 30 are connected by wires 50. The wires 50 can cross the fixed layer 20 around the pixel islands 30 to achieve connection and complete the transmission of current signals. The fixed layer 20 uses insulating materials and does not affect the current transmission.

[0062] The embodiment of the present invention provides a display panel 100. By setting an opening 14 on a flexible substrate 10 of the display panel 100 and setting at least a portion of a fixed layer 20 in the opening 14, the fixed layer 20 is connected to a corresponding encapsulation layer 40 on a pixel island 30. When the display panel 100 is stretched, the fixed layer 20 is at least partially filled in the opening 14, and is clamped by the opening 14, so that the fixed layer 20 can remain relatively still with the flexible substrate 10, ensuring that the fixed layer 20 is always located around the pixel island 30, thereby enabling the encapsulation layer 40 connected to the fixed layer 20 to remain relatively still with the corresponding pixel island 30, preventing the encapsulation layer 40 from breaking or detaching during the stretching process of the screen body, playing a certain fixing role on the encapsulation layer 40, and improving the stability of the encapsulation of the pixel island 30. At the same time, the fixed layer 20 can also fix the position and size of the pixel display area, preventing the pixel display area from being deformed due to the stretching and bending of the screen body, and having a more stable display effect.

[0063] As an alternative embodiment, see Figure 1 The orthographic projection of the fixing layer 20 on the flexible substrate 10 is a closed or non-closed ring structure, and / or the fixing layer 20 is arranged around the pixel island 30. For example, the non-closed ring structure is equivalent to being provided with a gap. For example, the closed ring structure is equivalent to not being provided with a gap.

[0064] In this embodiment, the fixed layer 20 can be arranged around the contour of the pixel island 30, so that the fixed layer 20 forms a closed ring structure, and the corresponding openings 14 are also arranged around the pixel island 30, so that the fixed layer 20 fully surrounds the pixel island 30. At this time, the fixed layer 20 can be completely connected to the encapsulation layer 40 to form an all-round limitation on the pixel island 30.

[0065] Optionally, the orthographic projection of the opening 14 on the flexible substrate 10 is a closed or non-closed ring structure, and / or the opening 14 is arranged around the pixel island 30 .

[0066] Optionally, the structural range of the fixed layer 20 can be selectively arranged according to actual design requirements. The larger the contact area between the fixed layer 20 and the encapsulation layer 40, the higher the stability between the two, and the encapsulation layer 40 can be further prevented from detaching. The present application does not make any special restrictions on the specific setting position and structure of the fixed layer 20, and it is sufficient to ensure the connection with the encapsulation layer 40.

[0067] An embodiment of the present invention provides a display panel 100, which forms a larger area connection with the encapsulation layer 40 by forming a fixed layer 20 around the pixel island 30 in a closed or non-closed ring structure, and restricts the encapsulation layer 40 from all directions, thereby fully preventing the relative movement of the encapsulation layer 40 and having higher structural stability.

[0068] As an alternative embodiment, see Figure 2 The fixing layer 20 includes a first fixing portion 21 and a second fixing portion 22 connected to each other, the first fixing portion 21 is arranged in the opening 14 and the second fixing portion 22 is arranged on a side of the first fixing portion 21 close to the encapsulation layer 40. The second fixing portion 22 is arranged on a side of the first fixing portion 21 away from the flexible substrate 10, and the second fixing portion 22 protrudes from the flexible substrate 10 in the thickness direction Z and is in the same layer as the pixel island 30.

[0069] Optionally, the orthographic projection of a portion of the second fixing portion 22 on the flexible substrate 10 is located outside the orthographic projection of the opening 14 on the flexible substrate 10 , and is located on a side of the flexible substrate 10 close to the packaging layer 40 .

[0070] The fixing layer 20 in this embodiment is composed of two parts, namely a first fixing part 21 and a second fixing part 22, wherein the first fixing part 21 is filled in the opening 14, so that the second fixing part 22 is exposed at the top and protrudes from the surface of the flexible substrate 10, the purpose of which is to increase the height of the fixing layer 20, so as to facilitate the snap-fitting with the opening 14. When the screen body is stretched, the fixing layer 20 can better snap-fit ​​with the opening 14.

[0071] At the same time, the second fixing portion 22 is used to increase the overall height of the fixing layer 20, which is also beneficial to the overlap of the fixing layer 20 and the packaging layer 40. During the molding process, the two can be connected more quickly and have a better supporting effect. The present application does not impose any special limitation on the specific height of the second fixing portion 22.

[0072] An embodiment of the present invention provides a display panel 100, which provides a fixing layer 20 with a first fixing portion 21 and a second fixing portion 22, and utilizes the second fixing portion 22 to protrude from the surface of the flexible substrate 10, thereby making it easier to form a snap-fitting relationship with the position of the opening 14, thereby improving the stability of the fixing layer 20, and further improving the structural stability of the encapsulation layer 40, and further reducing the risk of the encapsulation layer 40 detaching.

[0073] As an alternative embodiment, see Figure 2 , the orthographic projection of the first fixing portion 21 on the flexible substrate 10 is located within the orthographic projection of the second fixing portion 22 on the flexible substrate 10 .

[0074] Optionally, an orthographic projection area of ​​the first fixing portion 21 on the flexible substrate 10 is smaller than an orthographic projection area of ​​the second fixing portion 22 on the flexible substrate 10 .

[0075] Optionally, the width of the second fixing portion 22 can be greater than the width of the first fixing portion 21. The first fixing portion 21 serves as a filling base in the opening 14. When the second fixing portion 22 protrudes from the surface of the flexible substrate 10 and the width increases, a step-like structure is formed between the second fixing portion 22 and the first fixing portion 21, which facilitates a more stable snap-on connection at the position of the opening 14, thereby improving the overall structural stability of the fixing layer 20.

[0076] Optionally, a height dimension H2 of the second fixing portion 22 away from the surface of the flexible substrate 10 in the thickness direction Z of the flexible substrate 10 is greater than a height dimension H1 of the pixel island 30 away from the surface of the flexible substrate 10. That is, a distance between the surface of the second fixing portion 22 away from the flexible substrate 10 and the flexible substrate 10 in the thickness direction Z of the flexible substrate 10 is greater than a distance between the surface of the pixel island 30 away from the flexible substrate 10 and the flexible substrate 10 in the thickness direction Z of the flexible substrate 10.

[0077] The height dimension of the second fixing portion 22 in the thickness direction Z is greater than the height dimension of the pixel island 30, that is, it is necessary to ensure that the upper surface of the second fixing portion 22 is higher than the upper surface of the pixel island 30. Figure 2 As shown, when the thickness of the pixel island 30 is H1, the thickness of the second fixing portion 22 is H2, and H2>H1. In this way, the second fixing portion 22 can not only surround the pixel island 30 and connect with the encapsulation layer 40, but also play a certain role as a dam for the pixel island 30.

[0078] When the pixel island 30 is molded with the encapsulation layer 40, since the second fixing portion 22 is higher than the pixel island 30 and is arranged around the pixel island 30, it can form a barrier to the flow components in the encapsulation layer 40, facilitate the molding of the encapsulation layer 40, prevent the overflow of the encapsulation material, and facilitate the connection with the encapsulation layer 40 to fix the encapsulation layer 40.

[0079] The present application does not impose any special limitation on the specific protruding height of the second fixing portion 22 , as long as it can play the dual role of facilitating the molding of the encapsulation layer 40 and fixing the encapsulation layer 40 in this embodiment, and the height can be designed according to actual needs.

[0080] The height of the surface of each structure may be based on the flexible substrate, and the height increases in a direction away from the flexible substrate.

[0081] The embodiment of the present invention provides a display panel 100, which can cooperate with the opening 14 on the flexible substrate 10 to form a more stable connection structure by further limiting the width and height of the second fixing portion 22, and further prevent the relative separation of the encapsulation layer 40. At the same time, the height design of the second fixing portion 22 is also beneficial to prevent the overflow of the encapsulation material, and facilitates the efficient molding of the encapsulation layer 40.

[0082] As an optional embodiment, the material of the fixed layer 20 includes an inorganic material, such as an inorganic insulating material, such as one or more of silicon oxide, silicon nitride, silicon oxynitride, and the like.

[0083] Optionally, the encapsulation layer 40 includes an inorganic layer and an organic layer 43 which are stacked, and the encapsulation layer 40 is connected to the fixing layer 20 via the inorganic layer.

[0084] Optionally, in this embodiment, the fixing layer 20 can be set to an inorganic material. The inorganic material has a certain structural hardness and can better form a snap-fit ​​relationship with the opening 14 to improve the structural stability of the screen during the stretching process.

[0085] Optionally, the encapsulation layer 40 specifically includes an inorganic layer and an organic layer 43. The inorganic layer is usually formed by chemical vapor deposition, and the organic layer 43 can be formed by inkjet printing. The organic layer 43 has a certain fluidity. Therefore, in this embodiment, the inorganic layer can be connected to the fixed layer 20, and a more stable connection can be formed on the basis that both are inorganic materials. The organic layer 43 may include an organic insulating material.

[0086] Optionally, the inorganic layer includes a first inorganic layer 41 and a second inorganic layer 42 which are stacked in sequence in a direction away from the flexible substrate 10, the first inorganic layer 41 is arranged on the side of the pixel island 30 away from the flexible substrate 10, the organic layer 43 is arranged between the first inorganic layer 41 and the second inorganic layer 42, and at least one of the first inorganic layer 41 and the second inorganic layer 42 is connected to the fixed layer 20.

[0087] That is to say, the first inorganic layer 41 and the second inorganic layer 42 in the encapsulation layer 40 can be connected to the fixed layer 20 at the same time, so as to have a larger contact area, thereby improving the stability of the overall structure. Of course, according to actual connection requirements, one of the first inorganic layer 41 and the second inorganic layer 42 can be connected to the fixed layer 20, and the present application does not limit this.

[0088] The first inorganic layer 41 may include an inorganic insulating material, such as one or more of silicon oxide, silicon nitride, silicon oxynitride, etc. The second inorganic layer 42 may include an inorganic insulating material, such as one or more of silicon oxide, silicon nitride, silicon oxynitride, etc. For example, the material of the first inorganic layer 41 and the fixed layer 20 is the same or different. For example, the material of the second inorganic layer 42 and the fixed layer 20 is the same or different.

[0089] Optionally, the first inorganic layer 41 covers part of the fixed layer 20 and is connected to the fixed layer 20. The first inorganic layer 41 may be located on the side of the fixed layer 20 away from the flexible substrate. Optionally, the second inorganic layer 42 is coated on the organic layer 43 and the first inorganic layer 41 and extends beyond the edge of the first inorganic layer 41 to be connected to the fixed layer 20. This connection method makes the connection between the encapsulation layer 40 and the fixed layer 20 most reliable.

[0090] An embodiment of the present invention provides a display panel 100, which sets the fixing layer 20 as an inorganic material and connects the inorganic layer in the encapsulation layer 40 to the fixing layer 20. On the basis of using the same material for both, due to the same material properties, the two are easier to combine and the connection is more stable, thereby improving the overall connection strength and providing reliable guarantee for the sustainable fixation of the encapsulation layer 40.

[0091] As an alternative embodiment, see Figure 2 The flexible substrate 10 includes a first organic substrate 11, an inorganic substrate 13 and a second organic substrate 12 which are stacked, the inorganic substrate 13 is arranged between the first organic substrate 11 and the second organic substrate 12, the pixel island 30 is arranged on a side of the second organic substrate 12 away from the inorganic substrate 13, the opening 14 at least passes through the second organic substrate 12, and the fixed layer 20 is at least partially located in the opening 14 and connected to the inorganic substrate 13.

[0092] Optionally, the flexible substrate 10 in this embodiment specifically includes a composite laminate structure of a first organic substrate 11, an inorganic substrate 13, and a second organic substrate 12. When the opening 14 is set on the flexible substrate 10, the depth of the opening 14 can be determined according to actual design requirements, and the present application does not limit this. The inorganic substrate 13 may include an inorganic insulating material, such as one or more of silicon oxide, silicon nitride, silicon oxynitride, etc. The first organic substrate 11 may include an organic insulating material, such as polyimide. The second organic substrate 12 may include an organic insulating material, such as polyimide. For example, the material of the inorganic substrate 13 and the fixed layer 20 is the same or different.

[0093] Since the middle layer of the flexible substrate 10 is set as the inorganic substrate 13, and the fixed layer 20 is usually set as an inorganic material to improve the structural strength, the opening 14 can be extended to the position of the inorganic substrate 13 of the flexible substrate 10. When the fixed layer 20 is formed, the fixed layer 20 is deposited on the inorganic substrate 13. The same inorganic material can form a more continuous connection and have higher structural stability.

[0094] If the fixed layer 20 is connected to the inorganic layer in the encapsulation layer 40 at this time, that is, the top of the fixed layer 20 is connected to the inorganic layer, and the bottom is connected to the inorganic substrate 13 of the flexible substrate 10, the fixed layer 20, the encapsulation layer 40 and the flexible substrate 10 form a continuous closed inorganic ring body in the thickness direction Z. On the basis of the mutual fusion of materials, the position of the encapsulation layer 40 is further reinforced, so that it is firmly connected to the flexible substrate 10, and the probability of displacement and detachment of the encapsulation layer 40 is minimized.

[0095] Optionally, in order to better achieve the connection stability between the encapsulation layer 40 and the fixed layer 20 and the flexible substrate 10, the inorganic layer, the fixed layer 20 and the inorganic substrate 13 can be made of the same inorganic material, such as silicon nitride or silicon oxide, etc., which is not limited in the present application.

[0096] An embodiment of the present invention provides a display panel 100, which arranges the flexible substrate 10 as a three-layer composite stacked structure and extends the opening 14 to the position of the inorganic substrate 13 therein, so that the fixed layer 20 can be connected to the inorganic substrate 13 through the opening 14. While utilizing the opening 14 to improve the structural stability, it is also beneficial to the coordination and connection between materials, thereby further improving the connection strength of the fixed layer 20 in the opening 14.

[0097] As an alternative embodiment, see Figure 3 and Figure 4 The display panel 100 further includes a dam structure 60 disposed on one side of the flexible substrate 10 . For example, the dam structure 60 may be disposed between the flexible substrate 10 and the encapsulation layer 40 .

[0098] The dam structure 60 is disposed on a side of the fixed layer 20 close to the pixel island 30, or the dam structure 60 is disposed on a side of the fixed layer 20 away from the flexible substrate 10. The dam structure 60 may be located inside the fixed layer 20 or on the fixed layer 20, and has the effect of preventing the encapsulated organic layer from overflowing into the fixed area (i.e., the area where the fixed layer 20 is located), and preventing the encapsulated inorganic layer from being unable to connect with the inorganic layer in the fixed area, thereby causing encapsulation failure.

[0099] The orthographic projection of the dam structure 60 on the flexible substrate 10 is a closed or non-closed ring structure, and / or the dam structure 60 is disposed around the pixel island 30 .

[0100] For example, the surface of the dam structure 60 away from the flexible substrate 10 is higher than the surface of the pixel island 30 away from the flexible substrate 10 along the thickness direction Z of the flexible substrate 10. That is, the distance H3 between the surface of the dam structure 60 away from the flexible substrate 10 and the flexible substrate 10 along the thickness direction Z of the flexible substrate 10 is greater than the distance H1 between the surface of the pixel island 30 away from the flexible substrate 10 and the flexible substrate 10 along the thickness direction Z of the flexible substrate 10.

[0101] Taking into account the fluidity of the organic layer 43 during the molding process of the encapsulation layer 40, a dam structure 60 is set inside the area enclosed by the fixed layer 20 in this embodiment. The dam structure 60 can also form a closed annular structure on the inside, thereby effectively limiting the flow of the organic layer 43 in the surrounding directions during the molding process of the organic layer 43.

[0102] Of course, according to the requirements for setting the dam structure 60, the dam structure 60 can be set on the top surface of the fixed layer 20. The dam structure 60 has a certain height and can also form a closed annular structure on the fixed layer 20, so that in the process of forming the organic layer 43, the flow of the organic layer 43 in the surrounding directions can be effectively restricted.

[0103] Optionally, the height of the dam structure 60 needs to be set to be greater than the height of the pixel island 30, that is, it is necessary to ensure that the upper surface of the dam structure 60 is higher than the upper surface of the pixel island 30. Figure 4 As shown, when the thickness of the pixel island 30 is H1, the thickness of the dam structure 60 is H3, and H3>H1 is required. Thus, in the process of forming the organic layer 43, the flow of the organic layer 43 can be effectively blocked, reducing the risk of the organic layer 43 crossing the dam structure 60 and causing a blocking failure. The specific height of the dam structure 60 is not particularly limited in this application, as long as it can play a blocking role for the package.

[0104] Optionally, the pixel island 30 includes an array layer 31, a pixel definition layer 32 and a light-emitting unit 33, the array layer 31 is arranged on the flexible substrate 10, the pixel definition layer 32 is arranged on the side of the array layer 31 away from the flexible substrate 10, the pixel definition layer 32 has a plurality of pixel openings, and a plurality of light-emitting units 33 are arranged in the pixel openings.

[0105] Optionally, a distance H2 between a surface of the fixing layer 20 facing away from the flexible substrate 10 and the flexible substrate 10 along a thickness direction Z of the flexible substrate 10 is greater than a distance between a surface of the light emitting unit 33 facing away from the flexible substrate 10 and the flexible substrate 10 along the thickness direction Z of the flexible substrate 10 .

[0106] For example, the light emitting unit 33 includes an anode layer, a light emitting layer, and a cathode layer stacked in sequence.

[0107] Optionally, the display panel 100 further includes a support column 70, which is disposed on a side of the pixel definition layer 32 away from the array layer 31, and a surface of the dam structure 60 away from the flexible substrate 10 is higher than a surface of the support column 70 away from the flexible substrate 10 along the thickness direction of the flexible substrate 10. That is, a distance H3 between the surface of the dam structure 60 away from the flexible substrate 10 and the flexible substrate 10 along the thickness direction Z of the flexible substrate 10 is greater than a distance between the surface of the support column 70 away from the flexible substrate 10 and the flexible substrate 10 along the thickness direction Z of the flexible substrate 10.

[0108] For example, the pixel definition layer 32 may include an organic insulating material. For example, the support pillar 70 may include an organic insulating material.

[0109] The dam structure 60 includes part or all of a first portion 61, a second portion 62, and a third portion 63 stacked in the thickness direction Z. For example, the first portion 61 is disposed in the same layer as at least a portion of the array layer 31, and / or the second portion 62 is disposed in the same layer as the pixel definition layer 32, and / or the third portion 63 is disposed in the same layer as the support column 70. For example, the thickness of the third portion 63 along the thickness direction Z of the flexible substrate 10 is greater than the thickness of the support column 70 along the thickness direction Z of the flexible substrate 10. For example, the first portion 61 is disposed in the same layer as the inorganic insulating layer and / or the organic insulating layer in at least a portion of the array layer 31.

[0110] In this way, the dam structure 60 can be integrally formed with the pixel island 30. When the various film layer structures of the pixel island 30 are formed, the dam structure 60 can be formed simultaneously, so that a complete dam structure 60 is formed after stacking, which not only plays a role in blocking the packaging, but also saves process steps and reduces process costs.

[0111] The first part 61 can be integrally formed when the array layer 31 of the pixel island 30 is formed, and the first part 61 can be an array inorganic layer. The second part 62 can be formed when the pixel definition layer 32 is formed, that is, an organic insulating layer is formed. The third part 63 is integrally formed during the process of forming the support column 70, and can also be an inorganic support layer. After etching to obtain the stacked structure of the first part 61, the second part 62 and the third part 63, an overall dam structure 60 is formed.

[0112] The above-mentioned molding process is to facilitate the integrated molding with the pixel island 30 . The present application does not limit the molding process, and different processes and materials can also be used as long as they can exert the blocking effect of the dam structure 60 .

[0113] An embodiment of the present invention provides a display panel 100, in which a dam structure 60 is arranged on the inner side of a fixed layer 20. The height of the dam structure 60 can be used to block the forming of an encapsulation layer 40, which is beneficial to completing the forming of the encapsulation layer 40. At the same time, the dam structure 60 can be integrally formed with the film layer of the pixel island 30, thereby saving process steps and reducing process difficulty and cost.

[0114] As an alternative embodiment, see Figure 4 The display panel 100 includes a reinforcing layer 80, which is disposed on the flexible substrate 10, and between the flexible substrate 10 and the pixel island 30. The pixel island 30 and / or the dam structure 60 are located on a side of the reinforcing layer 80 away from the flexible substrate 10. For example, the pixel island 30 and the dam structure 60 are located on a side of the reinforcing layer 80 away from the flexible substrate 10 in the thickness direction Z.

[0115] For example, the elastic modulus of the reinforcing layer 80 is greater than the elastic modulus of the flexible substrate 10 . For example, the hardness of the reinforcing layer 80 is greater than the hardness of the flexible substrate 10 .

[0116] Optionally, the reinforcing layer 80 may include an organic material, such as a resin material, such as an acrylic material, etc., which is arranged on the flexible substrate 10 and carries the pixel island 30, so that the elastic modulus of the reinforcing layer 80 is greater than the elastic modulus of the inorganic layer in the flexible substrate 10. The purpose is mainly to consider that the array layer 31 in the pixel island 30 is made of inorganic material, and the encapsulation layer 40 has an inorganic layer. When the screen is stretched, it is easy to damage the above-mentioned inorganic hard material. Therefore, in this embodiment, a reinforcing layer 80 is arranged on the flexible substrate 10. The reinforcing layer 80 is arranged in the pixel display area, such as coating a resin material, so as to strengthen the strength of the pixel display area (that is, the area where the pixel conductor is located) to prevent the pixel display area from being deformed due to the stretching and bending of the screen.

[0117] Due to the provision of the reinforcing layer 80, the structural strength of the entire screen is increased, and during the stretching or bending of the screen, it has better flexibility, can better absorb stress, and protect the inorganic materials in the pixel island 30 and the encapsulation layer 40. Optionally, the present application does not specifically limit the specific location of the reinforcing layer 80, and the structural strength of the entire screen can be increased by means of the material properties of the reinforcing layer 80.

[0118] An embodiment of the present invention provides a display panel 100, which provides a reinforcing layer 80 on a flexible substrate 10 and utilizes the material properties of the reinforcing layer 80 to make the display area of ​​the screen have higher structural strength, thereby better adapting to the process of stretching or bending the screen, protecting the inorganic materials at various positions, and improving the safety performance of the overall structure.

[0119] As an alternative embodiment, see Figure 5 and Figure 6 The flexible substrate 10 is provided with a groove 90, the groove 90 is at least partially located between two adjacent pixel islands 30, and the wire 50 is at least partially located on the inner wall and bottom of the groove 90. For example, the wire 50 at least partially extends in contact with the inner wall of the groove 90.

[0120] Taking into account that adjacent pixel islands 30 are connected by wires 50, the distance between adjacent pixel islands 30 will gradually increase during the stretching process of the screen. In order to protect the wires 50 and prevent them from breaking during the stretching process, in this embodiment, grooves 90 are set between adjacent pixel islands 30. The wires 50 need to extend along the inner wall of the grooves 90 when connected, thereby increasing the length of the wires 50 and adapting to the stretching process of the screen.

[0121] When the screen is stretched, the groove 90 increases the extension length of the wire 50, so the wire 50 will not break immediately during stretching, but a certain length buffer is formed. The depth of the groove 90 determines the extension length of the wire 50. The present application does not limit this, and the length of the wire 50 can be extended by means of the groove 90.

[0122] Optionally, the wire 50 is located between the fixing layer 20 and the flexible substrate 10. Optionally, the wire 50 is at least partially located on the inner wall and the bottom of the opening 14.

[0123] Optionally, the orthographic projection of the groove 90 on the flexible substrate 10 is a closed or non-closed ring structure, and / or the groove 90 is arranged around the pixel island 30 and the fixed layer 20 along the circumference of the pixel island 30; the fixed layer 20 can be arranged around the pixel island 30, so as to limit the position of the packaging layer 40 corresponding to the pixel island 30. At the same time, the groove 90 can also be arranged around the periphery of the fixed layer 20, which is beneficial to the extension of the wires 50 of the pixel island 30 in all directions.

[0124] Optionally, the groove 90 is located on a side of the opening 14 and / or the fixed layer 20 surrounded by the groove 90 away from the pixel island 30 surrounded by the groove 90 .

[0125] For example, at least part of the groove 90 is located between adjacent pixel islands 30. Optionally, the display panel is a stretchable display panel. Figure 6 and Figure 7 As shown, for the connection of the wire 50 between adjacent pixel islands 30, the wire 50 can be set at the bottom of the opening 14 for conductive connection, and the fixed layer 20 can be deposited on the wire 50 in the opening 14 at this time; of course, the fixed layer 20 can also be deposited in the opening 14 first, and the wire 50 crosses the fixed layer 20 at the position of the opening 14, that is, it is set on the fixed layer 20, so as to ensure the connection between adjacent pixel islands 30. The present application is not limited to this, and it is sufficient to form an effective connection between adjacent pixel islands 30.

[0126] Optionally, the wire 50 is located on a side of the fixing layer 20 away from the flexible substrate 10 .

[0127] Optionally, there are multiple grooves 90, and the multiple grooves 90 are arranged at intervals from each other; that is, the grooves 90 can be arranged as multiple annular structures so that they are interlocked as a whole, and the wire 50 is extended progressively section by section under the action of the multiple grooves 90.

[0128] It is understandable that the more grooves 90 the wires 50 pass through, the better the extension effect. The present application does not impose any special limitation on the number of grooves 90 to be set, which can be determined based on the actual required length of the wires 50. The figure takes two rings of grooves 90 set around each pixel island 30 as an example for explanation.

[0129] Optionally, the flexible substrate 10 includes a first organic substrate 11, an inorganic substrate 13, and a second organic substrate 12 which are stacked, the inorganic substrate 13 is disposed between the first organic substrate 11 and the second organic substrate 12, the pixel island 30 is disposed on a side of the second organic substrate 12 away from the inorganic substrate 13, the groove 90 is disposed on the second organic substrate 12, and the depth dimension of the groove 90 in the thickness direction Z of the flexible substrate 10 is less than the thickness dimension of the second organic substrate 12 in the thickness direction Z of the flexible substrate 10. For example, the depth dimension of the groove 90 in the thickness direction Z of the flexible substrate 10 is equal to half of the thickness dimension of the second organic substrate 12 in the thickness direction Z of the flexible substrate 10.

[0130] The depth dimension of the groove 90 in the thickness direction Z of the flexible substrate 10 is smaller than the depth dimension of the opening in the thickness direction Z of the flexible substrate 10 . The opening may penetrate the second organic substrate 12 .

[0131] It can be seen that the groove 90 does not penetrate the second organic substrate 12 on the flexible substrate 10, so that while the extension length of the wire 50 is increased by means of the groove 90, the structural strength requirement of the flexible substrate 10 as a whole is also met, ensuring that the structural strength of the flexible substrate 10 as a whole is not greatly reduced, and a stable load is formed for structures such as the pixel island 30. Designers can determine the depth of the groove 90 by comprehensively balancing the extension length required for the wire 50 and the bearing strength of the flexible substrate 10.

[0132] An embodiment of the present invention provides a display panel 100, which extends the length of the wire 50 between adjacent pixel islands 30 by setting grooves 90 around the pixel islands 30, and adjusts the length of the wire 50 by adjusting the depth, number and other data of the grooves 90, so that the wire 50 can better meet the stretching requirements of the screen body, form better safety protection for the wire 50, and reduce the risk of breakage during the stretching process.

[0133] According to an embodiment of the present invention, a display device is provided, including the display panel 100 as described above.

[0134] The embodiments of the present invention provide a display panel and a display device. By arranging an opening on a flexible substrate of the display panel and arranging at least a portion of a fixed layer in the opening, the fixed layer is connected to a corresponding packaging layer on a pixel island. When the display panel is stretched, the fixed layer is at least partially filled in the opening and is clamped by the opening, so that the fixed layer and the flexible substrate can remain relatively still, ensuring that the fixed layer is always located around the pixel island, thereby enabling the packaging layer connected to the fixed layer to remain relatively still with the corresponding pixel island, preventing the packaging layer from breaking or detaching during the stretching of the screen body, playing a certain fixing role on the packaging layer, and improving the stability of the pixel island packaging. At the same time, the fixed layer can also fix the position and size of the pixel display area, preventing the pixel display area from being deformed due to the stretching and bending of the screen body, and having a more stable display effect.

[0135] The display device may include a mobile phone, a tablet computer, a laptop computer, a wearable device, or a vehicle-mounted display device.

[0136] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display panel, characterized in that: include: A flexible substrate, wherein an opening is provided on the flexible substrate; A fixing layer, at least a portion of which is disposed in the opening and surrounds the opening to form a receiving area; A pixel island is arranged on one side of the flexible substrate and located in the receiving area, and adjacent pixel islands are connected by wires; The encapsulation layer is at least arranged on a side of the pixel island away from the flexible substrate and connected to the fixing layer.

2. The display panel according to claim 1, characterized in that: At least a portion of the fixed layer is located between adjacent pixel islands; Preferably, the orthographic projection of the fixed layer on the flexible substrate is a closed ring structure, and is arranged around the pixel island; Preferably, the orthographic projection of the opening on the flexible substrate is a closed ring structure, and is arranged around the pixel island.

3. The display panel according to claim 1, characterized in that: The fixing layer comprises a first fixing portion and a second fixing portion connected to each other, the first fixing portion is arranged in the opening and the second fixing portion is arranged on a side of the first fixing portion close to the encapsulation layer; Preferably, an orthographic projection of a portion of the second fixing portion on the flexible substrate is located outside an orthographic projection of the opening on the flexible substrate, and is located on a side of the flexible substrate close to the packaging layer.

4. The display panel according to claim 3, characterized in that: The orthographic projection of the first fixing portion on the flexible substrate is located within the orthographic projection of the second fixing portion on the flexible substrate; Preferably, the orthographic projection area of ​​the first fixing portion on the flexible substrate is smaller than the orthographic projection area of ​​the second fixing portion on the flexible substrate; Preferably, a height dimension of a surface of the second fixing portion away from the flexible substrate in a thickness direction of the flexible substrate is greater than a height dimension of a surface of the pixel island away from the flexible substrate in the thickness direction of the flexible substrate.

5. The display panel according to claim 1, characterized in that: The material of the fixed layer includes an inorganic material, the encapsulation layer includes an inorganic layer and an organic layer stacked in layers, and the encapsulation layer is connected to the fixed layer through the inorganic layer; Preferably, the inorganic layer includes a first inorganic layer and a second inorganic layer stacked in sequence in a direction away from the flexible substrate, the first inorganic layer is arranged on a side of the pixel island away from the flexible substrate, the organic layer is arranged between the first inorganic layer and the second inorganic layer, and at least one of the first inorganic layer and the second inorganic layer is connected to the fixed layer; Preferably, the first inorganic layer covers a portion of the fixed layer and is connected to the fixed layer; Preferably, the second inorganic layer covers the organic layer and the first inorganic layer and extends beyond the edge of the first inorganic layer to be connected to the fixed layer.

6. The display panel according to claim 5, characterized in that: The flexible substrate includes a first organic substrate, an inorganic substrate, and a second organic substrate which are stacked, the inorganic substrate is arranged between the first organic substrate and the second organic substrate, the pixel island is arranged on a side of the second organic substrate away from the inorganic substrate, the opening at least passes through the second organic substrate, and the fixed layer is at least partially located in the opening and connected to the inorganic substrate.

7. The display panel according to claim 1, characterized in that: The display panel further comprises a dam structure disposed between the flexible substrate and the encapsulation layer, wherein the dam structure is disposed on a side of the fixed layer close to the pixel island, or the dam structure is disposed on a side of the fixed layer away from the flexible substrate; Preferably, the orthographic projection of the dam structure on the flexible substrate is a closed ring structure and is arranged around the pixel island, and the surface of the dam structure away from the flexible substrate is higher than the surface of the pixel island away from the flexible substrate along the thickness direction of the flexible substrate; Preferably, the pixel island comprises an array layer, a pixel definition layer and a light emitting unit, the array layer is arranged on the flexible substrate, the pixel definition layer is arranged on a side of the array layer away from the flexible substrate, the pixel definition layer has a plurality of pixel openings, a plurality of the light emitting units are arranged in the pixel openings, the display panel further comprises a support column, the support column is arranged on a side of the pixel definition layer away from the array layer, and a surface of the dam structure away from the flexible substrate is higher than a surface of the support column away from the flexible substrate in a thickness direction of the flexible substrate; The dam structure includes a first part, a second part and a third part stacked in the thickness direction of the flexible substrate, the first part is arranged in the same layer as at least part of the array layer, the second part is arranged in the same layer as the pixel definition layer, and the third part is arranged in the same layer as the support column.

8. The display panel according to claim 7, characterized in that: The display panel comprises a reinforcing layer, wherein the reinforcing layer is disposed between the flexible substrate and the pixel island, and the pixel island and the dam structure are located on a side of the reinforcing layer away from the flexible substrate; Preferably, the elastic modulus of the reinforcement layer is greater than the elastic modulus of the flexible substrate; Preferably, the material of the reinforcement layer includes resin material.

9. The display panel according to claim 1, characterized in that: A groove is provided on the flexible substrate, wherein the groove is at least partially located between two adjacent pixel islands, and the conductive line is at least partially located on the inner wall and bottom of the groove; Preferably, the orthographic projection of the groove on the flexible substrate is a closed ring structure and is arranged around the pixel island and the fixed layer along the circumference of the pixel island; Preferably, there are a plurality of grooves, and the plurality of grooves are arranged at intervals from each other; Preferably, the flexible substrate comprises a first organic substrate, an inorganic substrate, and a second organic substrate which are stacked, the inorganic substrate is arranged between the first organic substrate and the second organic substrate, the pixel island is arranged on a side of the second organic substrate away from the inorganic substrate, the groove is arranged in the second organic substrate, and the depth dimension of the groove in the thickness direction of the flexible substrate is smaller than the thickness dimension of the second organic substrate in the thickness direction of the flexible substrate; Preferably, the wire is located between the fixed layer and the flexible substrate, and at least part of the wire is located on the inner wall and bottom of the opening; Preferably, the groove is located on a side of the opening surrounded by the groove and / or the fixed layer away from the pixel island surrounded by the groove; Preferably, the display panel is a stretchable display panel.

10. A display device, characterized in that: Comprising the display panel as claimed in any one of claims 1 to 9.

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