Display panel, manufacturing method thereof and display device

Abstract

The invention provides a display panel, a manufacturing method thereof and a display device, relates to the technical field of display, and can ensure the performance of a display device in a folding process. The display panel comprises a driving circuit substrate and a light-emitting device substrate which are arranged in a stacked mode. The driving circuit substrate comprises a plurality of pixel driving circuits; the light-emitting device substrate comprises a pixel chain and a plurality of pixel islands, each pixel island comprises a rigid substrate and a light-emitting element arranged on the rigid substrate, the light-emitting element comprises an anode pattern, and the anode pattern is coupled with a corresponding pixel driving circuit; a pixel chain is arranged between at least part of adjacent pixel islands, the pixel chain comprises a flexible substrate and a functional film layer arranged on the flexible substrate, when the display panel is in a non-stress state, the pixel chain is in a wrinkle state protruding out of the driving circuit substrate, and when the display panel is in a stress state, at least part of wrinkles of the pixel chain are pulled open.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel, a manufacturing method thereof and a display device. BACKGROUND

[0002] An organic light-emitting diode (OLED) is a display device of organic material light-emitting. At present, in the industry, a plurality of organic materials is attached to an anode by means of evaporation when the display device is manufactured, and a corresponding voltage is applied between the cathode and the anode after the cathode is evaporated to realize the light-emitting of the organic material. With the development of the OLED industry, the folding screen is becoming a hot development direction, and various technical problems on the folding product follow. For the light-emitting device, the biggest problem is the performance maintenance of the device in the folding process. In the folding process, the multi-functional layer of the light-emitting device will be pulled by the folding stress, and if the organic material stack structure is damaged in the pulling process, the performance of the light-emitting device will be reduced. Therefore, how to ensure the performance of the display device in the folding process becomes a technical problem to be solved. SUMMARY

[0003] The present application aims to provide a display panel, a manufacturing method thereof and a display device, which can ensure the performance of the display device in the folding process.

[0004] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0005] The first aspect of the present application provides a display panel, comprising: a driving circuit substrate and a light-emitting device substrate which are stacked;

[0006] The driving circuit substrate comprises a plurality of pixel driving circuits;

[0007] The light-emitting device substrate comprises a pixel chain and a plurality of pixel islands, the pixel island comprises a rigid substrate and a light-emitting element arranged on the rigid substrate, the light-emitting element comprises an anode pattern, and the anode pattern is coupled with the corresponding pixel driving circuit;

[0008] At least part of the adjacent pixel islands has the pixel chain, the pixel chain comprises a flexible substrate and a functional film layer arranged on the flexible substrate, when the display panel is in a non-stressed state, the pixel chain is in a wrinkle state protruding from the driving circuit substrate, and when the display panel is in a stressed state, at least part of the wrinkles of the pixel chain is pulled apart.

[0009] Optionally, the display panel comprises a plurality of pixel chain rows, each pixel chain row comprises a plurality of pixel chains arranged in a first direction in sequence;

[0010] The plurality of pixel islands are divided into a plurality of pixel island rows, each pixel island row comprising a plurality of pixel islands arranged along a first direction, and the pixel island rows and the pixel chain rows are alternately arranged along a second direction intersecting the first direction.

[0011] Optionally, the display panel comprises a plurality of pixel chain columns, each pixel chain column comprising a plurality of pixel chains arranged along a second direction in sequence;

[0012] The plurality of pixel islands are divided into a plurality of pixel island columns, each pixel island column comprising a plurality of pixel islands arranged along a second direction, and the pixel island columns and the pixel chain columns are alternately arranged along a first direction.

[0013] Optionally, the functional film layer comprises a pixel definition layer and a carrier transport layer stacked in sequence along a direction away from the driving circuit substrate.

[0014] Based on the technical scheme of the above display panel, a second aspect of the present application provides a display device comprising the above display panel.

[0015] Based on the technical scheme of the above display panel, a third aspect of the present application provides a manufacturing method of a display panel, used for manufacturing the above display panel, and the manufacturing method comprises:

[0016] manufacturing a driving circuit substrate, the driving circuit substrate comprising a plurality of pixel driving circuits;

[0017] manufacturing a light emitting device substrate, the light emitting device substrate comprising a plurality of pixel chains and a plurality of pixel islands, each pixel island comprising a rigid substrate and a light emitting element disposed on the rigid substrate, the light emitting element comprising an anode pattern, and at least part of adjacent pixel islands being separated by the pixel chains, each pixel chain comprising a flexible substrate and a functional film layer disposed on the flexible substrate, the pixel chain being in a wrinkle state protruding from the driving circuit substrate when the display panel is in a non-stressed state, and at least part of the wrinkle of the pixel chain being pulled apart when the display panel is in a stressed state;

[0018] aligning and overlapping the light emitting device substrate and the driving circuit substrate to couple the anode pattern and the corresponding pixel driving circuit.

[0019] Optionally, the step of manufacturing a light emitting device substrate specifically comprises:

[0020] manufacturing a plurality of pixel islands and a pixel chain transition structure on a temporary carrier, the pixel chain transition structure comprising a flexible substrate and a functional film layer disposed on the flexible substrate, the flexible substrate and the functional film layer being in a flat state, and at least part of adjacent pixel islands being separated by the pixel chain transition structure;

[0021] peeling off the temporary carrier plate to obtain a light emitting device substrate transition structure;

[0022] providing a stretchable substrate with a plurality of fixing structures, aligning and combining the light emitting device substrate transition structure with the stretchable substrate in a stretched state, so that the pixel islands are located on the corresponding fixing structures;

[0023] transforming the stretchable substrate from the stretched state to a contracted state, so that the flexible substrate and the functional film layer in the flat state in the pixel chain transition structure are raised to form the pixel chain;

[0024] peeling off the stretchable substrate to form the light emitting device substrate.

[0025] Optionally, the step of manufacturing the pixel island and the pixel chain transition structure on the temporary carrier plate specifically comprises:

[0026] manufacturing a flexible substrate on the temporary carrier plate;

[0027] manufacturing the rigid base on the flexible substrate;

[0028] manufacturing an anode pattern on the rigid base;

[0029] manufacturing a pixel definition layer, the pixel definition layer defining a pixel opening region, the pixel opening region being directly above the anode pattern;

[0030] manufacturing a carrier transport layer, the carrier transport layer including a portion above the pixel definition layer and a portion in the pixel opening region, the portion of the carrier transport layer in the pixel opening region being used as a part of the light emitting element, at least part of the pixel definition layer between adjacent pixel islands and the carrier transport layer above the pixel definition layer forming the pixel chain transition structure.

[0031] Optionally, the display panel includes a plurality of pixel chain rows, each of the pixel chain rows including a plurality of pixel chains arranged in a first direction in sequence; the plurality of pixel islands are divided into a plurality of pixel island rows, each of the pixel island rows including a plurality of pixel islands arranged in the first direction, and the pixel island rows and the pixel chain rows are arranged in a second direction in alternation;

[0032] The step of aligning and combining the light emitting device substrate transition structure with the stretchable substrate in the stretched state specifically comprises: aligning and combining the light emitting device substrate transition structure with the stretchable substrate in a stretched state in the second direction;

[0033] The step of transforming the stretchable substrate from the stretched state to the contracted state specifically comprises:

[0034] The step of transforming the stretchable substrate from the stretched state in the second direction to the contracted state in the second direction.

[0035] Optionally, the display panel comprises a plurality of pixel chain columns, each of the pixel chain columns comprises a plurality of pixel chains arranged in sequence along the second direction; the plurality of pixel islands are divided into a plurality of pixel island columns, each of the pixel island columns comprises a plurality of pixel islands arranged along the second direction, and the pixel island columns and the pixel chain columns are arranged alternately along the first direction.

[0036] The step of aligning and combining the light-emitting device substrate transition structure with the stretchable substrate in the stretched state specifically comprises: aligning and combining the light-emitting device substrate transition structure with the stretchable substrate in the stretched state along the first direction.

[0037] The step of converting the stretchable substrate from the stretched state to the contracted state specifically comprises:

[0038] The stretchable substrate is converted from the stretched state along the first direction to the contracted state along the first direction.

[0039] In the technical solution provided by the present application, a plurality of pixel islands are arranged, and the pixel chains are formed between at least some adjacent pixel islands. When the display panel is in a non-stressed state, the pixel chains are in a wrinkled state protruding from the driving circuit substrate. During folding or bending of the display panel, i.e., when the display panel is in a stressed state, at least part of the wrinkles of the pixel chains are pulled apart, and the wrinkled structure releases the stress generated by folding or bending, thereby maintaining the stability of the pixel islands. The micro-stack structure (i.e., the light-emitting element) of the multi-layer organic material included in the pixel islands remains unchanged, thereby ensuring the performance stability of the light-emitting element in the pixel islands. As can be seen, in the technical solution provided by the present application, a composite structure of pixel islands and pixel chains is formed. During folding of the display panel, the flexible structure of the pixel chains can release stress, thereby maintaining the stability of the rigid structure of the pixel islands, avoiding pulling on the light-emitting element included in the pixel islands, and thereby better ensuring the device performance of the light-emitting element. BRIEF DESCRIPTION OF DRAWINGS

[0040] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the present application. In the drawings:

[0041] Figure 1 A manufacturing process schematic diagram of the light-emitting device substrate transition structure is provided for the embodiments of the present application;

[0042] Figure 2 A manufacturing process schematic diagram of the light-emitting device substrate is provided for the embodiments of the present application;

[0043] Figure 3A schematic view of alignment and overlap of a light-emitting device substrate and a driving circuit substrate provided by an embodiment of the present application;

[0044] Figure 4 A schematic view of formation of a pixel chain by a stretching substrate changing from a stretching state to a shrinking state provided by an embodiment of the present application;

[0045] Figure 5 A schematic view of a fixed structure in a stretching substrate corresponding to at least two pixel islands provided by an embodiment of the present application;

[0046] Figure 6 A planar schematic view of a display panel provided by an embodiment of the present application. DETAILED DESCRIPTION

[0047] To further illustrate the display panel and the manufacturing method thereof and the display device provided by an embodiment of the present application, detailed description is made below with reference to the accompanying drawings.

[0048] Please refer to Figure 3 and Figure 6 An embodiment of the present application provides a display panel, comprising: a driving circuit substrate X1 and a light-emitting device substrate X2 which are arranged in layers;

[0049] The driving circuit substrate X1 comprises a plurality of pixel driving circuits 60.

[0050] The light-emitting device substrate X2 comprises a pixel chain 50 and a plurality of pixel islands 401, the pixel island 401 comprises a rigid substrate 12 and a light-emitting element arranged on the rigid substrate 12, the light-emitting element comprises an anode pattern Ano, and the anode pattern Ano is coupled with a corresponding pixel driving circuit 60.

[0051] At least part of the adjacent pixel islands 401 have the pixel chain 50, the pixel chain 50 comprises a flexible substrate 11 and a functional film layer arranged on the flexible substrate 11, when the display panel is in a non-stressed state, the pixel chain 50 is in a wrinkle state protruding from the driving circuit substrate X1, and when the display panel is in a stressed state, at least part of the wrinkles of the pixel chain 50 are pulled apart.

[0052] For example, the driving circuit substrate X1 comprises a plurality of pixel driving circuits 60 arranged in an array, the specific structure of the pixel driving circuit 60 is various, for example: 7T1C (i.e. comprising 7 transistors and 1 capacitor) and the like, but is not limited thereto.

[0053] Exemplarily, the light emitting device substrate X2 comprises a plurality of pixel islands 401 arranged in an array, the plurality of pixel islands 401 can be divided into a plurality of pixel island rows and a plurality of pixel island columns, the plurality of pixel island rows are arranged along the second direction, each pixel island row comprises a plurality of pixel islands 401 arranged along the first direction, the plurality of pixel island columns are arranged along the first direction, each pixel island column comprises a plurality of pixel islands 401 arranged along the second direction.

[0054] Exemplarily, the pixel island 401 comprises a rigid substrate 12 and a light emitting element arranged on the rigid substrate 12, the rigid substrate 12 can be selected from rigid metal, silicon nitride, silicon oxide and other inorganic materials, but is not limited thereto; the light emitting element comprises an anode pattern Ano, the anode pattern Ano is coupled with a transistor in the corresponding pixel driving circuit 60 through the underlying rigid substrate 12 and flexible substrate 11.

[0055] Exemplarily, the light emitting element further comprises a hole injection layer, a hole transport layer, an organic light emitting material layer, an electron transport layer, an electron injection layer and a cathode layer arranged in sequence away from the rigid substrate 12. The thickness of the anode pattern Ano included in the light emitting element is between 10 nm and 20 nm, the thickness of the hole injection layer is between 5 nm and 10 nm, the thickness of the hole transport layer is between 60 nm and 80 nm, the thickness of the organic light emitting material layer is between 30 nm and 50 nm, the thickness of the electron transport layer is between 30 nm and 40 nm, the thickness of the electron transport layer is between 5 nm and 10 nm, the thickness of the cathode layer is between 10 nm and 20 nm, the thickness of the hole injection layer and the electron injection layer is relatively thin, the main role is to provide holes and electrons, enhance the concentration and transmission efficiency of carriers, holes and electrons are combined in the organic light emitting material layer to form excitons, and then converted into photons to emit light.

[0056] Exemplarily, the pixel chain 50 comprises a flexible substrate 11 and a functional film layer arranged on the flexible substrate 11, the functional film layer comprises a pixel definition layer PDL and a carrier transport layer 20 arranged in sequence away from the driving circuit substrate X1. It should be noted that the hole injection layer, the hole transport layer, the electron transport layer and the electron injection layer are all laid in the whole plane, therefore, the hole injection layer, the hole transport layer, the electron transport layer and the electron injection layer all comprise a part above the anode pattern Ano and a part between adjacent anode patterns Ano, the part above the anode pattern Ano can be part of the light emitting element, and the part between adjacent anode patterns Ano can be the carrier transport layer 20 included in the pixel chain 50.

[0057] For example, the flexible substrate 11 is laid across the entire surface. Therefore, the flexible substrate 11 includes a portion located below the anode pattern Ano and a portion located between adjacent anode patterns Ano. The portion located between adjacent anode patterns Ano can be part of the pixel chain 50.

[0058] For example, when the display panel is in a non-stressed state, the flexible substrate 11 and functional film layer of the pixel chain 50 are in a wrinkled state protruding from the driving circuit substrate X1. When the display panel is in a stressed state, at least part of the wrinkles of the flexible substrate 11 and functional film layer of the pixel chain 50 are pulled apart.

[0059] As can be seen from the specific structure of the display panel described above, the display panel provided in this embodiment of the invention comprises a plurality of pixel islands 401, and a pixel chain 50 is formed between at least some of the adjacent pixel islands 401. When the display panel is in a non-stressed state, the pixel chain 50 is in a folded state protruding from the driving circuit substrate X1. During the folding or bending process of the display panel, that is, when the display panel is in a stressed state, at least some of the folds of the pixel chain 50 are pulled open, and the folded structure releases the stress generated by folding or bending, thereby maintaining the stability of the pixel islands 401, so that the multilayer organic material micro-stacked structure (i.e., light-emitting elements) included in the pixel islands 401 remains unchanged, thereby ensuring the performance stability of the light-emitting elements in the pixel islands 401.

[0060] As can be seen, the display panel provided in this embodiment of the invention forms a composite structure of pixel island 401 and pixel chain 50. During the folding process of the display panel, the flexible structure of pixel chain 50 can release stress, thereby maintaining the stability of the rigid structure of pixel island 401 and avoiding pulling on the light-emitting elements included in pixel island 401, thereby better ensuring the device performance of the light-emitting elements.

[0061] like Figure 6 As shown, in some embodiments, the display panel includes multiple rows of pixel chains 50a, each row of the pixel chain 50a including multiple pixel chains 50 arranged sequentially along a first direction; the multiple pixel islands 401 are divided into multiple rows of pixel islands 40, each row of pixel islands 40 including multiple pixel islands 401 arranged along the first direction, the pixel islands 40 and the pixel chain rows 50a are arranged alternately along a second direction, the second direction intersecting the first direction.

[0062] For example, each row of pixel chains 50a includes a plurality of pixel chains 50 arranged sequentially along a first direction, the plurality of pixel chains 50 forming an integral structure.

[0063] In the display panel, the pixel island rows 40 and the pixel chain rows 50a are arranged alternately along the second direction, so that when the display panel is subjected to a bending force along the second direction, the pixel chain rows 50a can release the stress generated by the bending force to maintain the stability of the rigid structure of the pixel islands 401, avoid pulling the light emitting elements included in the pixel islands 401, and thus better ensure the device performance of the light emitting elements.

[0064] In some embodiments, the display panel includes a plurality of pixel chain columns, each of the pixel chain columns including a plurality of pixel chains 50 arranged along the second direction in sequence; and the plurality of pixel islands 401 are divided into a plurality of pixel island columns, each of the pixel island columns including a plurality of pixel islands 401 arranged along the second direction, and the pixel island columns and the pixel chain columns are arranged alternately along the first direction.

[0065] For example, each of the pixel chain columns includes a plurality of pixel chains 50 arranged along the second direction in sequence, and the plurality of pixel chains 50 are formed as an integral structure.

[0066] In the display panel, the pixel island rows 40 and the pixel chain rows 50a are arranged alternately along the second direction, so that when the display panel is subjected to a bending force along the second direction, the pixel chain rows 50a can release the stress generated by the bending force to maintain the stability of the rigid structure of the pixel islands 401, avoid pulling the light emitting elements included in the pixel islands 401, and thus better ensure the device performance of the light emitting elements.

[0067] The embodiments of the present application also provide a display device including the display panel provided by the above embodiments.

[0068] For example, the display panel includes an organic light emitting diode display panel, but is not limited thereto.

[0069] It should be noted that the display device can be any product or component having a display function, such as a television, a display, a digital photo frame, a mobile phone, a tablet computer, etc., and the display device further includes a flexible circuit board, a printed circuit board, a back plate, etc.

[0070] The display panel provided by the above embodiment is provided with a plurality of pixel islands 401, and the pixel chain 50 is formed between at least some adjacent pixel islands 401. When the display panel is in a non-stressed state, the pixel chain 50 is in a wrinkle state protruding from the driving circuit substrate X1. During folding or bending of the display panel, that is, when the display panel is in a stressed state, at least part of the wrinkle of the pixel chain 50 is pulled open, and the wrinkle structure releases the stress generated by folding or bending, thereby maintaining the stability of the pixel island 401, so that the micro-stack structure (that is, the light-emitting element) of the multi-layer organic material included in the pixel island 401 remains unchanged, thereby ensuring the performance stability of the light-emitting element in the pixel island 401. The display panel provided by the above embodiment forms a composite structure of the pixel island 401 and the pixel chain 50. During folding of the display panel, the flexible structure of the pixel chain 50 can release stress, thereby maintaining the stability of the rigid structure of the pixel island 401, avoiding pulling on the light-emitting element included in the pixel island 401, and thereby better ensuring the device performance of the light-emitting element.

[0071] The display device provided by the embodiment of the present application also has the beneficial effects described above when including the above display panel, and details are not repeated here.

[0072] As shown in Figure 3 and Figure 6 The embodiment of the present application also provides a manufacturing method of a display panel, which is used to manufacture the display panel provided by the above embodiment, and the manufacturing method comprises the following steps:

[0073] manufacturing a driving circuit substrate X1, wherein the driving circuit substrate X1 comprises a plurality of pixel driving circuits 60;

[0074] manufacturing a light-emitting device substrate X2, wherein the light-emitting device substrate X2 comprises a pixel chain 50 and a plurality of pixel islands 401, the pixel island 401 comprises a rigid substrate 12 and a light-emitting element arranged on the rigid substrate 12, the light-emitting element comprises an anode pattern Ano, at least some adjacent pixel islands 401 have the pixel chain 50, the pixel chain 50 comprises a flexible substrate 11 and a functional film layer arranged on the flexible substrate 11, when the display panel is in a non-stressed state, the pixel chain 50 is in a wrinkle state protruding from the driving circuit substrate X1, and when the display panel is in a stressed state, at least part of the wrinkle of the pixel chain 50 is pulled open;

[0075] aligning and overlapping the light-emitting device substrate X2 and the driving circuit substrate X1, so that the anode pattern Ano is coupled with the corresponding pixel driving circuit 60. Specifically, as shown in Figure 3As shown: The light-emitting device substrate X2 forming the pleated structure is aligned and overlapped with the driving circuit substrate X1, so that the source and drain electrodes of the corresponding transistor structure in the driving circuit substrate X1 are aligned with the anode pattern Ano of the light-emitting element in the light-emitting device substrate X2, ensuring that the corresponding transistor structure can provide an accurate current signal to the anode pattern Ano, thereby lighting up the light-emitting element, so that the light-emitting element forms a red sub-pixel, a green sub-pixel, or a blue sub-pixel to emit light.

[0076] In the display panel manufactured using the method provided in this embodiment of the invention, a plurality of pixel islands 401 are provided, and a pixel chain 50 is formed between at least partially adjacent pixel islands 401. When the display panel is in a non-stressed state, the pixel chain 50 is in a folded state protruding from the driving circuit substrate X1. During the folding or bending of the display panel, i.e., when the display panel is under stress, at least some of the folds of the pixel chain 50 are pulled open, and the folded structure releases the stress generated by folding or bending, thereby maintaining the stability of the pixel islands 401. This ensures that the multilayer organic material microstructure (i.e., light-emitting elements) included in the pixel islands 401 remains unchanged, thus guaranteeing the performance stability of the light-emitting elements in the pixel islands 401. Therefore, the display panel manufactured using the method provided in this embodiment of the invention forms a composite structure of pixel islands 401 and pixel chains 50. During the folding of the display panel, the flexible structure of the pixel chain 50 can release stress, thereby maintaining the stability of the rigid structure of the pixel islands 401 and avoiding pulling on the light-emitting elements included in the pixel islands 401, thus better guaranteeing the device performance of the light-emitting elements.

[0077] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments, the step of fabricating a light-emitting device substrate X2 specifically includes:

[0078] Multiple pixel islands 401 and pixel chain transition structures 501 are fabricated on a temporary carrier plate 10. The pixel chain transition structure 501 includes a flexible substrate 11 and a functional film layer disposed on the flexible substrate 11. The flexible substrate 11 and the functional film layer are in a flat state, and the pixel chain transition structure 501 is present between at least some of the adjacent pixel islands 401.

[0079] The temporary carrier plate 10 is peeled off to obtain the light-emitting device substrate transition structure X3;

[0080] A stretching substrate 13 with a plurality of fixing structures 30 is provided, and the luminescent device substrate transition structure X3 is combined with the stretching substrate 13 in the stretching state in a position alignment manner, so that the pixel island 401 is located on the corresponding fixing structure 30. Specifically, after the temporary carrier 10 is peeled off to obtain the luminescent device substrate transition structure X3, the luminescent device substrate transition structure X3 is combined with the stretching substrate 13 in the stretching state in a position alignment manner. The stretching substrate 13 in the stretching state can be in a stretching state in the first direction or in a stretching state in the second direction. When the position alignment is performed, the pixel island 401 in the luminescent device substrate transition structure X3 is aligned with the corresponding fixing structure 30, so that the pixel island 401 can be located on the corresponding fixing structure 30 after the position alignment and combination. For example, at least one pixel island 401 can be arranged on each fixing structure 30, for example, two pixel islands 401 can be arranged.

[0081] The stretching substrate 13 is converted from the stretching state to the shrinking state, and the flexible substrate 11 and the functional film layer in the pixel chain transition structure 501 in the flat state are raised to form the pixel chain 50. Specifically, the stretching substrate 13 is released, and the stretching substrate 13 is converted from the stretching state to the shrinking state, so that the flexible substrate 11 and the functional film layer in the pixel chain transition structure 501 in the flat state are raised with the shrinking of the stretching substrate 13, thereby forming the pixel chain 50. As shown in Figure 2 and Figure 4 During the process of the stretching substrate 13 from the stretching state to the shrinking state, the pixel island 401 is not affected by the state change of the stretching substrate 13 under the fixing effect of the fixing structure 30 on the stretching substrate 13, and the pixel chain transition structure 501 is raised to form the pixel chain 50 with an ordered wrinkle structure.

[0082] As shown in Figure 2 and Figure 3 The stretching substrate 13 is peeled off to form the luminescent device substrate X2.

[0083] For example, the temporary carrier 10 can be a glass carrier, but is not limited thereto.

[0084] For example, the fixing structure 30 has a fixing effect on the pixel island 401 above it, so that the fixing structure 30 can fix the pixel island 401 above it when the stretching substrate 13 is converted between the stretching state and the shrinking state, thereby avoiding the influence of the stress generated when the state of the stretching substrate 13 is switched on the pixel island 401.

[0085] For example, the fixing structure 30 includes a rigid structure, and the conductive performance thereof is not limited, which can be made of metal, silicon nitride, silicon oxide or other inorganic materials.

[0086] More specifically, the steps for fabricating the pixel island 401 and the pixel chain transition structure 501 on the temporary carrier 10 include:

[0087] A flexible substrate is fabricated on a temporary carrier plate 10; specifically, a flexible substrate is deposited on the temporary carrier plate 10 to form the flexible substrate.

[0088] The rigid substrate 12 is fabricated on the flexible substrate; specifically, the rigid substrate 12 is formed using conventional patterning processes such as exposure and development.

[0089] An anode pattern Ano is formed on the rigid substrate 12; specifically, the anode pattern Ano is formed using conventional patterning processes such as exposure and development.

[0090] A pixel definition layer (PDL) is fabricated, which defines the pixel opening area and is located directly above the anode pattern (Ano). Specifically, the pixel definition layer (PDL) is formed using conventional patterning processes such as exposure and development. The pixel definition layer (PDL) defines the pixel opening area and marks the position and size of the organic light-emitting material layer in the vapor-deposited light-emitting element.

[0091] A carrier transport layer 20 is fabricated, comprising a portion above the pixel definition layer PDL and a portion located in the pixel opening region. The portion of the carrier transport layer 20 located in the pixel opening region serves as part of the light-emitting element. The pixel boundary layer at least partially located between adjacent pixel islands 401 and the carrier transport layer 20 above the pixel boundary layer form the pixel chain transition structure 501. Specifically, the carrier transport layer 20 is formed using a vapor deposition process, but is not limited to this.

[0092] like Figure 6 As shown, in some embodiments, the display panel includes multiple rows of pixel chains 50a, each row of the pixel chain 50a including multiple pixel chains 50 arranged sequentially along a first direction; the multiple pixel islands 401 are divided into multiple rows of pixel islands, each row of pixel islands including multiple pixel islands 401 arranged along the first direction, and the pixel island rows and the pixel chain rows 50a are arranged alternately along a second direction;

[0093] The step of aligning and combining the light-emitting device substrate transition structure X3 with the stretched substrate 13 in a stretched state specifically includes: aligning and combining the light-emitting device substrate transition structure X3 with the stretched substrate 13 in a stretched state along the second direction.

[0094] The step of changing the stretched substrate 13 from a stretched state to a contracted state specifically includes: changing the stretched substrate 13 from a state stretched along a second direction to a state contracted along a second direction.

[0095] Exemplarily, the multiple rows of pixel island rows include first pixel island rows and second pixel island rows alternately arranged along the second direction, the first pixel island rows include red pixel islands R and green pixel islands G alternately arranged along the first direction, and the second pixel island rows include green pixel islands G and blue pixel islands B alternately arranged along the first direction. The first pixel island rows and the second pixel island rows adjacent to each other have the pixel chain rows 50a therebetween.

[0096] In some embodiments, the display panel includes multiple columns of pixel chain columns, each of the pixel chain columns includes multiple pixel chains 50 arranged in sequence along the second direction; and the multiple pixel islands 401 are divided into multiple columns of pixel island columns, each of the pixel island columns includes multiple pixel islands 401 arranged along the second direction, and the pixel island columns and the pixel chain columns are alternately arranged along the first direction.

[0097] The step of aligning and combining the light emitting device substrate transition structure X3 with the stretched substrate 13 in the stretched state specifically includes: aligning and combining the light emitting device substrate transition structure X3 with the stretched substrate 13 in the stretched state along the first direction.

[0098] The step of converting the stretched substrate 13 from the stretched state to the contracted state specifically includes: converting the stretched substrate 13 from the stretched state along the first direction to the contracted state along the first direction.

[0099] Exemplarily, the multiple columns of pixel island columns include first pixel island columns and second pixel island columns alternately arranged along the first direction, the first pixel island columns include red pixel islands R and green pixel islands G alternately arranged along the second direction, and the second pixel island columns include green pixel islands G and blue pixel islands B alternately arranged along the second direction. The first pixel island columns and the second pixel island columns adjacent to each other have the pixel chain columns therebetween.

[0100] It should be noted that the "same layer" in the embodiments of the present application can refer to a film layer on the same structure layer. Alternatively, for example, the film layers on the same layer can be layer structures formed by using the same film forming process to form a film layer for forming a specific pattern, and then patterning the film layer by using the same mask plate through a one-time patterning process. According to different specific patterns, the one-time patterning process can include multiple exposure, development or etching processes, and the specific patterns in the formed layer structure can be continuous or discontinuous. These specific patterns can also be at different heights or have different thicknesses.

[0101] In the method embodiments of the present application, the serial numbers of the steps cannot be used to limit the sequence of the steps, and for those skilled in the art, the changes in the sequence of the steps without creative labor are also within the protection scope of the present application.

[0102] It should be noted that each of the embodiments described in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the difference from other embodiments. In particular, for the method embodiments, since they are basically similar to the product embodiments, they are described more simply, and the relevant parts can be referred to the part of the product embodiments.

[0103] Unless otherwise defined, technical terms or scientific terms used in the present disclosure shall have the ordinary meaning commonly understood by one of ordinary skill in the art to which the present disclosure belongs. The terms "first", "second", and similar terms used in the present disclosure do not denote any order, quantity, or importance, but are used to distinguish different components. The terms "include", "contain", and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connect", "couple", or "link" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are used only to represent relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships can also be changed accordingly.

[0104] It can be understood that when an element such as a layer, a film, a region, or a substrate is referred to as being "on" or "under" another element, it can be "directly" on or under the other element, or an intermediate element can be present.

[0105] In the description of the above-described embodiments, specific features, structures, materials, or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0106] The above description is merely specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A display panel, characterized in that, include: A driving circuit substrate and a light-emitting device substrate stacked together; The driving circuit substrate includes multiple pixel driving circuits; The light-emitting device substrate includes a pixel chain and multiple pixel islands. Each pixel island includes a rigid substrate and a light-emitting element disposed on the rigid substrate. Each light-emitting element includes an anode pattern, and the anode pattern is coupled to a corresponding pixel driving circuit. The pixel chain is located between at least some of the adjacent pixel islands. The pixel chain includes a flexible substrate and a functional film layer disposed on the flexible substrate. When the display panel is in a non-stressed state, the pixel chain is in a wrinkled state protruding from the driving circuit substrate. When the display panel is in a stressed state, at least some of the wrinkles of the pixel chain are pulled open.

2. The display panel according to claim 1, characterized in that, The display panel includes multiple rows of pixel chains, and each row of the pixel chain includes multiple pixel chains arranged sequentially along a first direction; The plurality of pixel islands are divided into multiple rows of pixel islands, each row of pixel islands comprising a plurality of pixel islands arranged along a first direction. The pixel island rows and the pixel chain rows are arranged alternately along a second direction, which intersects with the first direction.

3. The display panel according to claim 2, characterized in that, The display panel includes multiple columns of pixel chains, and each column of the pixel chain includes multiple pixel chains arranged sequentially along a second direction; The plurality of pixel islands are divided into multiple columns of pixel islands, each column comprising a plurality of pixel islands arranged along a second direction, and the pixel island columns and the pixel chain columns are arranged alternately along a first direction.

4. The display panel according to any one of claims 1 to 3, characterized in that, The functional film layer includes a pixel definition layer and a carrier transport layer that are sequentially stacked along a direction away from the driving circuit substrate.

5. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 4.

6. A method for manufacturing a display panel, characterized in that, The method for manufacturing a display panel as described in any one of claims 1 to 4 includes: Fabricate a driving circuit substrate, the driving circuit substrate including multiple pixel driving circuits; A light-emitting device substrate is fabricated, the light-emitting device substrate including a pixel chain and a plurality of pixel islands, the pixel island including a rigid substrate and a light-emitting element disposed on the rigid substrate, the light-emitting element including an anode pattern; at least partially adjacent pixel islands are provided with the pixel chain, the pixel chain including a flexible substrate and a functional film layer disposed on the flexible substrate, when the display panel is in a non-stressed state, the pixel chain is in a wrinkled state protruding from the driving circuit substrate, and when the display panel is in a stressed state, at least part of the wrinkles of the pixel chain are pulled open; The light-emitting device substrate and the driving circuit substrate are aligned and overlapped so that the anode pattern is coupled to the corresponding pixel driving circuit.

7. The method for manufacturing a display panel according to claim 6, characterized in that, The steps for fabricating a light-emitting device substrate specifically include: Multiple pixel islands and pixel chain transition structures are fabricated on a temporary carrier. The pixel chain transition structure includes a flexible substrate and a functional film layer disposed on the flexible substrate. The flexible substrate and the functional film layer are in a flat state, and the pixel chain transition structure is present between at least some of the adjacent pixel islands. The temporary carrier plate is peeled off to obtain the light-emitting device substrate transition structure; A stretched substrate with multiple fixed structures is provided, and the light-emitting device substrate transition structure is aligned and combined with the stretched substrate in a stretched state, so that the pixel island is located on the corresponding fixed structure. The stretched substrate is changed from a stretched state to a contracted state, causing the flexible substrate and functional film layer in the pixel chain transition structure, which were in a flat state, to bulge and form the pixel chain. The stretched substrate is peeled off to form the light-emitting device substrate.

8. The method for manufacturing a display panel according to claim 7, characterized in that, The specific steps for fabricating pixel islands and pixel chain transition structures on a temporary carrier board include: Fabricate a flexible substrate on a temporary carrier plate; The rigid substrate is fabricated on the flexible substrate; An anode pattern is fabricated on the rigid substrate; A pixel definition layer is created, which defines a pixel opening area located directly above the anode pattern; A carrier transport layer is fabricated, the carrier transport layer comprising a portion located above the pixel definition layer and a portion located in the pixel opening region, the portion of the carrier transport layer located in the pixel opening region serving as part of the light-emitting element, and a pixel boundary layer at least partially located between adjacent pixel islands and a carrier transport layer above the pixel boundary layer forming the pixel chain transition structure.

9. The method for manufacturing a display panel according to claim 7, characterized in that, The display panel includes multiple rows of pixel chains, each row of pixel chains including multiple pixel chains arranged sequentially along a first direction; the multiple pixel islands are divided into multiple rows of pixel islands, each row of pixel islands including multiple pixel islands arranged along a first direction, and the pixel island rows and the pixel chain rows are arranged alternately along a second direction; The step of aligning and combining the light-emitting device substrate transition structure with the stretched substrate in a stretched state specifically includes: aligning and combining the light-emitting device substrate transition structure with the stretched substrate in a stretched state along a second direction. The specific steps for changing the stretched substrate from a stretched state to a contracted state include: The stretched substrate is changed from a stretched state along the second direction to a contracted state along the second direction.

10. The method for manufacturing a display panel according to claim 7, characterized in that, The display panel includes multiple columns of pixel chains, each column of pixel chains including multiple pixel chains arranged sequentially along a second direction; the multiple pixel islands are divided into multiple columns of pixel islands, each column of pixel islands including multiple pixel islands arranged along a second direction, and the pixel island columns and the pixel chain columns are arranged alternately along a first direction; The step of aligning and combining the light-emitting device substrate transition structure with the stretched substrate in a stretched state specifically includes: aligning and combining the light-emitting device substrate transition structure with the stretched substrate in a stretched state along a first direction. The specific steps for changing the stretched substrate from a stretched state to a contracted state include: The stretched substrate is changed from a stretched state along the first direction to a contracted state along the first direction.

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