Display panel and display device

Abstract

The present invention provides a display panel and a display device, which relate to the field of display technology and are used to prevent the generation of GDSH defects. The display panel includes a display area, the display area includes a pixel area, an isolation area and an opening area, the isolation area is located between the pixel area and the opening area, and the isolation area surrounds the opening area; the display panel also includes: a conductive isolation column, an insulating layer and a cathode layer, the conductive isolation column is located in the isolation area, and the conductive isolation column is coupled to a fixed potential signal input terminal; the insulating layer is located on the side of the conductive isolation column facing away from the substrate substrate of the display panel; the cathode layer is located on the side of the insulating layer facing away from the substrate substrate, and the positive projection of the cathode layer on the substrate substrate at least partially overlaps with the positive projection of the conductive isolation column on the substrate substrate.

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 continuous development of display technology, more and more display products have built-in touch screens. At the same time, increasing the screen-to-body ratio of display products with built-in touch screens has also attracted more and more attention. At present, in order to achieve a higher screen-to-body ratio, a hole area is generally reserved on the display screen of the display product to accommodate some additional components (such as cameras, sensors, etc.) included in the display product.

[0003] However, when the opening area is formed by cutting process, cracks are easily generated around the opening area. Water vapor and oxygen enter the display product along the cracks, which will cause GDSH (black spots at the edge of the hole) defects. Therefore, how to prevent GDSH defects has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] An object of the present invention is to provide a display panel and a display device for preventing the occurrence of GDSH defects.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A first aspect of the present invention provides a display panel, comprising a display area, wherein the display area comprises a pixel area, an isolation area and an opening area, wherein the isolation area is located between the pixel area and the opening area, and the isolation area surrounds the opening area; the display panel further comprises:

[0007] Substrate substrate,

[0008] A conductive isolation column, the conductive isolation column is located in the isolation area, and the conductive isolation column is coupled to the fixed potential signal input terminal;

[0009] an insulating layer, the insulating layer being located on a side of the conductive isolation column facing away from the substrate;

[0010] A cathode layer is located on a side of the insulating layer facing away from the base substrate, and an orthographic projection of the cathode layer on the base substrate at least partially overlaps with an orthographic projection of the conductive isolation column on the base substrate.

[0011] Optionally, the display panel further includes:

[0012] an initialization signal transmission layer, at least a portion of the initialization signal transmission layer being located in the pixel area;

[0013] A conductive connection structure is coupled to the initialization signal transmission layer, and the conductive connection structure serves as the fixed potential signal input terminal.

[0014] Optionally, the conductive connection structure comprises: a first conductive connection portion and a second conductive connection portion arranged in different layers, the first conductive connection portion is coupled to the second conductive connection portion;

[0015] The first conductive connection portion is coupled to the initialization signal transmission layer, and the second conductive connection portion is coupled to the conductive isolation column.

[0016] Optionally, the display panel further includes a light shielding layer and a first source-drain metal layer which are sequentially stacked in a direction away from the base substrate;

[0017] The first conductive connection portion is provided in the same layer and material as the first source-drain metal layer, and the second conductive connection portion is provided in the same layer and material as the light shielding layer.

[0018] Optionally, the conductive isolation column includes: a first conductive pattern and a second conductive pattern coupled to each other, the first conductive pattern is located between the second conductive pattern and the base substrate, and the first conductive pattern is coupled to a fixed potential signal input terminal.

[0019] Optionally, the display panel includes a first source-drain metal layer and a second source-drain metal layer stacked in sequence in a direction away from the base substrate, the first conductive pattern is arranged in the same layer and material as the first source-drain metal layer, and the second conductive pattern is arranged in the same layer and material as the second source-drain metal layer.

[0020] Optionally, the display panel further includes:

[0021] a retaining wall structure, wherein the retaining wall structure is located in the isolation area;

[0022] At least one inner isolation column, the at least one inner isolation column is located in the isolation area and between the retaining wall structure and the pixel area, and a side surface of the inner isolation column has a notch;

[0023] At least one outer isolation column is located in the isolation area and between the retaining wall structure and the opening area, and a side surface of the outer isolation column has a notch.

[0024] Optionally, the display panel includes a plurality of the inner isolation columns, and the display panel also includes a plurality of grooves, along the direction from the pixel area to the opening area, the orthographic projections of the inner isolation columns on the substrate and the orthographic projections of the grooves on the substrate are alternately arranged.

[0025] Optionally, the display panel further includes at least one isolation portion, the isolation portion includes a first isolation pattern and a second isolation pattern, and the first isolation pattern, the second isolation pattern and the corresponding external isolation column are stacked in sequence in a direction away from the base substrate.

[0026] Based on the specific structure of the above display panel, a second aspect of the present invention provides a display device including the above display panel.

[0027] In the technical solution provided by the present invention, by setting the conductive isolation column in the isolation area, the conductive isolation column can effectively prevent the cracks generated when the opening area is formed by the cutting process from expanding into the display panel, thereby effectively preventing the occurrence of GDSH failure. Moreover, in the technical solution provided by the present invention, by setting the conductive isolation column to be coupled with the fixed potential input terminal, and setting the insulating layer to be located on the side of the substrate substrate of the conductive isolation column facing away from the display panel, the cathode layer is located on the side of the insulating layer facing away from the substrate substrate, and the positive projection of the cathode layer on the substrate substrate overlaps with the positive projection of the conductive isolation column on the substrate substrate at least partially; so that a fixed pressure difference is formed between the cathode layer and the conductive isolation column, so that the cathode layer, the insulating layer and the conductive isolation column form a parallel plate capacitor with a fixed pressure difference, and the parallel plate capacitor can store anions, cations, etc. from the polarizer and the outside, avoiding its corrosion to the encapsulation layer, thereby reducing the transmission path of water vapor and oxygen to the inside of the display panel, effectively preventing anions and cations from expanding into the inside of the display panel, and reducing the probability of GDSH failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0029] Figure 1 It is a schematic diagram of forming GDSH in the prior art;

[0030] Figure 2 A schematic diagram of the overall layout of a display panel provided by an embodiment of the present invention;

[0031] Figure 3 for Figure 2 Schematic diagram of the cross section along the A1A2 direction;

[0032] Figure 4 for Figure 3 An enlarged schematic diagram of the X1 portion. DETAILED DESCRIPTION

[0033] In order to further illustrate the display panel and the display device provided by the embodiments of the present invention, a detailed description is given below in conjunction with the accompanying drawings.

[0034] Based on the technical problems existing in the background technology, it is found through research that Figure 1 As shown, there are many reasons for the generation of GDSH in the display panel, among which the most influential ones are the expansion of cracks around the holes and the corrosion caused by various chemical components in the polarizer entering the display panel. Based on this discovery, the present invention provides the following technical solutions.

[0035] See also Figures 2 to 4 An embodiment of the present invention provides a display panel, comprising a display area, wherein the display area comprises a pixel area 10, an isolation area 11 and an opening area 12, wherein the isolation area 11 is located between the pixel area 10 and the opening area 12, and the isolation area 11 surrounds the opening area 12; the display panel further comprises:

[0036] Substrate substrate,

[0037] A conductive isolation column 20, wherein the conductive isolation column 20 is located in the isolation area 11, and the conductive isolation column 20 is coupled to the fixed potential signal input terminal;

[0038] An insulating layer 30, wherein the insulating layer 30 is located on a side of the conductive isolation column 20 facing away from the substrate PI;

[0039] The cathode layer 40 is located on the side of the insulating layer 30 facing away from the base substrate, and the orthographic projection of the cathode layer 40 on the base substrate at least partially overlaps with the orthographic projection of the conductive isolation column 20 on the base substrate.

[0040] The conductive isolation column 20 , the insulating layer 30 and the cathode layer 40 are all located on the base substrate.

[0041] Exemplarily, the display panel includes a display area and a peripheral area located around the display area, the peripheral area surrounds the display area, but is not limited thereto. The display area includes a pixel area 10, an isolation area 11 and an opening area 12, the isolation area 11 surrounds the opening area 12, and the pixel area 10 surrounds the isolation area 11, but is not limited thereto.

[0042] Exemplarily, the display panel includes a conductive isolation column 20, and the conductive isolation column 20 is at least partially arranged around the opening area 12, for example: the conductive isolation column 20 surrounds the opening area 12, but is not limited thereto. The conductive isolation column 20 is coupled to the fixed potential signal input terminal, and can receive the fixed potential signal input by the fixed potential signal input terminal, so that the conductive isolation column 20 has a stable fixed potential.

[0043] Exemplarily, the display panel further includes an insulating layer 30 , and the insulating layer 30 is located on a side of the conductive isolation column 20 facing away from the base substrate of the display panel. The insulating layer 30 can completely cover the conductive isolation column 20 , but is not limited thereto.

[0044] Exemplarily, the insulating layer 30 is provided in the same layer and the same material as other insulating film layers in the pixel area 10 of the display panel, and the insulating layer 30 can be formed simultaneously with the other insulating film layers in the same patterning process, thereby avoiding the need to add an additional patterning process to form the insulating layer 30, effectively simplifying the manufacturing process of the display panel and reducing the manufacturing cost of the display panel. For example, the insulating layer 30 is provided in the same layer and the same material as the organic planar layer in the display panel, but is not limited thereto.

[0045] Exemplarily, the display panel further includes a light-emitting functional layer, a cathode layer 40, an encapsulation layer, a flat layer, a glue layer, and a polarizer layer, which are located on the side of the insulating layer 30 facing away from the base substrate and are sequentially stacked in a direction away from the base substrate. By arranging the cathode layer 40 on the side of the insulating layer 30 facing away from the base substrate, and the orthographic projection of the cathode layer 40 on the base substrate at least partially overlaps with the orthographic projection of the conductive isolation column 20 on the base substrate, a parallel plate capacitor is formed between the cathode layer 40, the insulating layer 30, and the conductive isolation column 20.

[0046] According to the specific structure of the above-mentioned display panel, in the display panel provided by the embodiment of the present invention, by arranging the conductive isolation column 20 in the isolation area 11, the conductive isolation column 20 can effectively prevent the cracks generated when the opening area 12 is formed by the cutting process from expanding into the interior of the display panel, thereby effectively preventing the occurrence of GDSH defects.

[0047] Moreover, in the display panel provided by the embodiment of the present invention, the conductive isolation column 20 is arranged to be coupled with the fixed potential input terminal, and the insulating layer 30 is arranged to be located on the side of the substrate of the conductive isolation column 20 that is away from the display panel, and the cathode layer 40 is located on the side of the insulating layer 30 that is away from the substrate, and the positive projection of the cathode layer 40 on the substrate at least partially overlaps with the positive projection of the conductive isolation column 20 on the substrate; so that a fixed pressure difference is formed between the cathode layer 40 and the conductive isolation column 20, so that the cathode layer 40, the insulating layer 30 and the conductive isolation column 20 form a parallel plate capacitor with a fixed pressure difference, and the parallel plate capacitor can store anions, cations, etc. from the polarizer and the outside, avoiding corrosion of the encapsulation layer, thereby reducing the transmission path of water vapor and oxygen, etc. to the inside of the display panel, effectively preventing anions and cations from expanding into the inside of the display panel, and reducing the probability of GDSH failure.

[0048] like Figures 2 to 4 As shown, in some embodiments, the display panel further includes:

[0049] An initialization signal transmission layer Vinit, at least a portion of the initialization signal transmission layer Vinit is located in the pixel area 10;

[0050] A conductive connection structure 50 is coupled to the initialization signal transmission layer Vinit, and the conductive connection structure 50 serves as the fixed potential signal input terminal.

[0051] Exemplarily, the initialization signal transmission layer Vinit transmits an initialization signal having a fixed potential, the pixel area 10 includes sub-pixels distributed in an array, the sub-pixels include coupled sub-pixel driving circuits and light-emitting elements, and the initialization signal transmission layer Vinit is coupled to the sub-pixel driving circuit for providing an initialization signal to the sub-pixel driving circuit.

[0052] Exemplarily, the display panel includes a first initialization signal transmission layer and a second initialization signal transmission layer, the first initialization signal transmitted in the first initialization signal transmission layer is used to initialize the gate of the driving transistor in the sub-pixel driving circuit, and the second initialization signal transmitted in the second initialization signal transmission layer is used to initialize the anode of the light-emitting element. The conductive connection structure 50 can be coupled to the first initialization signal transmission layer or the second initialization signal transmission layer, but is not limited thereto.

[0053] It should be noted that, when the display panel is designed, the initialization signal and the signal transmitted by the cathode layer 40 are designed to have a fixed smaller voltage difference. Therefore, the conductive isolation column 20 is coupled to the initialization signal transmission layer Vinit so that a parallel plate capacitor with a fixed voltage difference can be formed between the conductive isolation column 20 and the cathode layer 40, which can better attract charges.

[0054] Exemplarily, the conductive connection structure 50 is coupled to the conductive isolation column 20 as the fixed potential signal input terminal, and the conductive connection structure 50 is also coupled to the initialization signal transmission layer Vinit. The conductive connection structure 50 is used to transmit the initialization signal transmitted by the initialization signal transmission layer Vinit to the conductive isolation column 20.

[0055] The conductive connection structure 50 is coupled to the initialization signal transmission layer Vinit and the conductive isolation column 20 respectively, so that the conductive connection structure 50 can transmit the initialization signal transmitted by the initialization signal transmission layer Vinit to the conductive isolation column 20, so that the conductive isolation column 20 has the same fixed potential as the initialization signal. Moreover, the above-mentioned setting method allows the conductive isolation column 20 to be set at a position closer to the opening area 12 and farther from the pixel. Under this setting method, the electrical connection between the initialization signal transmission layer Vinit and the conductive isolation column 20 can be achieved through the conductive connection structure 50, which is conducive to reducing the difficulty of achieving electrical connection between the initialization signal transmission layer Vinit and the conductive isolation column 20.

[0056] like Figures 2 to 4 As shown, in some embodiments, the conductive connection structure 50 includes: a first conductive connection part 501 and a second conductive connection part 502 arranged in different layers, the first conductive connection part 501 is coupled to the second conductive connection part 502; the first conductive connection part 501 is coupled to the initialization signal transmission layer Vinit, and the second conductive connection part 502 is coupled to the conductive isolation column 20.

[0057] The conductive connection structure 50 is configured as the above structure, so that the conductive connection structure 50 can more reasonably utilize the limited layout space, thereby reducing the layout difficulty of the conductive connection structure 50 .

[0058] In some embodiments, the display panel also includes a light-shielding layer and a first source-drain metal layer stacked in sequence in a direction away from the base substrate; the first conductive connection portion 501 is arranged in the same layer and material as the first source-drain metal layer, and the second conductive connection portion 502 is arranged in the same layer and material as the light-shielding layer.

[0059] Exemplarily, the light shielding layer is located on a side of the sub-pixel driving circuit facing the base substrate, and the light shielding layer is used to shield a channel portion of a driving transistor in the sub-pixel driving circuit to ensure stable characteristics of the driving transistor.

[0060] Exemplarily, when the display panel adopts LTPO technology, the display panel includes a light shielding layer, a buffer layer, an active layer, a first gate insulating layer, a first gate metal layer, a second gate insulating layer GI2, a second gate metal layer, an interlayer insulating layer ILD, a first source-drain metal layer, a passivation layer, a first flat layer, a second source-drain metal layer, a second flat layer, an anode layer, a pixel defining layer, a light-emitting functional layer, a cathode layer 40, a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer, which are sequentially stacked in a direction away from the substrate PI. The display panel may also include a third source-drain metal layer and a third flat layer, wherein the third source-drain metal layer is located between the second flat layer and the anode layer, and the third flat layer is located between the third source-drain metal layer and the anode layer.

[0061] Exemplarily, the first source-drain metal layer, the second source-drain metal layer and the third source-drain metal layer all adopt a Ti / Al / Ti structure stacked in sequence, but is not limited thereto.

[0062] like Figure 3 and Figure 4 As shown, the figure also illustrates a barrier layer Bar, a mark 90 represents a buffer layer and a first gate insulating layer, a flat layer TOC, a glue layer PSA, and a polarizer POL.

[0063] The first conductive connection part 501 and the first source-drain metal layer are provided in the same layer and with the same material, so that the first conductive connection part 501 can be formed simultaneously with the first source-drain metal layer in the same patterning process, thereby simplifying the manufacturing process of the display panel and reducing the manufacturing cost of the display panel.

[0064] The second conductive connection portion 502 and the light shielding layer are provided in the same layer and with the same material, so that the second conductive connection portion 502 and the light shielding layer can be formed simultaneously in the same patterning process, thereby simplifying the manufacturing process of the display panel and reducing the manufacturing cost of the display panel.

[0065] Therefore, in the display panel provided by the above embodiment, without adding any masks and processes, the cathode layer 40, the insulating layer 30 and the conductive isolation column 20 form a parallel plate capacitor with a fixed pressure difference. The parallel plate capacitor can store anions, cations, etc. from the polarizer and the outside, avoiding corrosion of the encapsulation layer, thereby reducing the transmission path of water vapor and oxygen to the interior of the display panel, effectively preventing anions and cations from expanding into the interior of the display panel, and reducing the probability of GDSH failure.

[0066] like Figure 3 and Figure 4 As shown, in some embodiments, the conductive isolation column 20 includes: a first conductive pattern 201 and a second conductive pattern 202 coupled to each other, the first conductive pattern 201 is located between the second conductive pattern 202 and the base substrate, and the first conductive pattern 201 is coupled to a fixed potential signal input terminal.

[0067] Exemplarily, the orthographic projection of the first conductive pattern 201 on the base substrate is located inside the orthographic projection of the second conductive pattern 202 on the base substrate, and the first conductive pattern 201 is completely covered by the second conductive pattern 202 .

[0068] Exemplarily, the display panel includes a first source-drain metal layer and a second source-drain metal layer stacked in sequence in a direction away from the base substrate, the first conductive pattern 201 is provided in the same layer and material as the first source-drain metal layer, and the second conductive pattern 202 is provided in the same layer and material as the second source-drain metal layer. The insulating layer 30 is provided in the same layer and material as the second flat layer. This arrangement enables the first conductive pattern 201 to be formed simultaneously with the first source-drain metal layer in the same patterning process, the second conductive pattern 202 to be formed simultaneously with the second source-drain metal layer in the same patterning process, and the insulating layer 30 to be formed simultaneously with the second flat layer in the same patterning process, thereby greatly simplifying the manufacturing process of the display panel and reducing the manufacturing cost of the display panel.

[0069] The above-mentioned setting of the conductive isolation column 20 includes the first conductive pattern 201 and the second conductive pattern 202 coupled to each other, which not only makes the conductive isolation column 20 have better conductivity, but also makes the second conductive pattern 202 have a more appropriate distance from the cathode layer 40, forming a flat plate capacitor with a suitable storage capacitance.

[0070] like Figure 3 and Figure 4 As shown, in some embodiments, the display panel further includes:

[0071] A retaining wall structure Dam, wherein the retaining wall structure Dam is located in the isolation area 11;

[0072] At least one inner isolation column 61, the at least one inner isolation column 61 is located in the isolation area 11 and between the retaining wall structure Dam and the pixel area 10, and a side surface of the inner isolation column 61 has a notch B1;

[0073] At least one outer isolation column 62 is located in the isolation area 11 and between the retaining wall structure Dam and the opening area 12 , and a side surface of the outer isolation column 62 has a notch B1 .

[0074] Exemplarily, the recess is used to isolate the light-emitting functional layer in the display panel to prevent it from becoming a path for transmitting water vapor and oxygen into the display area.

[0075] Exemplarily, along the direction from the pixel area to the opening area, the width of the inner isolation column is substantially the same as that of the outer isolation column, and the width of the conductive isolation column is 2 to 3 times that of the outer isolation column.

[0076] Exemplarily, the retaining wall structure Dam surrounds the opening area 12, but is not limited thereto. The retaining wall structure Dam may include a first retaining wall pattern, a second retaining wall pattern, and a third retaining wall pattern sequentially stacked in a direction away from the substrate, wherein the first retaining wall pattern is provided in the same layer and material as the first flat layer, the second retaining wall pattern is provided in the same layer and material as the second flat layer, and the third retaining wall pattern is provided in the same layer and material as the pixel defining layer.

[0077] Exemplarily, the display panel includes a plurality of inner spacer columns 61 arranged in sequence along the direction from the pixel area 10 to the opening area 12, and the inner spacer columns 61 surround the opening area 12. The display panel includes a plurality of outer spacer columns 62 arranged in sequence along the direction from the pixel area 10 to the opening area 12, and the outer spacer columns 62 surround the opening area 12.

[0078] Exemplarily, the inner isolation column 61 is set in the same layer and material as the first source-drain metal layer in the display panel, or the inner isolation column 61 is set in the same layer and material as the second source-drain metal layer in the display panel; the outer isolation column 62 is set in the same layer and material as the third source-drain metal layer in the display panel, but is not limited to this.

[0079] The display panel is configured as above to include the retaining wall structure Dam, the inner spacer column 61 and the outer spacer column 62, which can better prevent cracks from extending into the interior of the display panel.

[0080] like Figure 3 and Figure 4As shown, in some embodiments, the display panel includes a plurality of the inner isolation columns 61, and the display panel also includes a plurality of grooves 70, along the direction from the pixel area 10 to the opening area 12, the orthographic projections of the inner isolation columns 61 on the substrate and the orthographic projections of the grooves 70 on the substrate are alternately arranged.

[0081] Exemplarily, the trench 70 is formed on the insulating film layer around the inner isolation column 61 , but is not limited thereto.

[0082] Exemplarily, the groove 70 surrounds the opening area 12 , but is not limited thereto.

[0083] The display panel is configured to include a plurality of grooves 70 , so that the plurality of grooves 70 can better prevent cracks from extending toward the inside of the display panel.

[0084] In some embodiments, the display panel also includes at least one isolation portion, the isolation portion includes a first isolation pattern 81 and a second isolation pattern 82, and the first isolation pattern 81, the second isolation pattern 82 and the corresponding external isolation column 62 are stacked in sequence along a direction away from the base substrate.

[0085] Exemplarily, the first isolation pattern 81 is provided at the same layer and with the same material as the first gate metal layer, and the second isolation pattern 82 is provided at the same layer and with the same material as the second gate metal layer, but the present invention is not limited thereto.

[0086] Exemplarily, an insulating film layer is provided between the first isolation pattern 81 and the second isolation pattern 82 , and an insulating film layer is provided between the second isolation pattern 82 and the outer isolation column 62 .

[0087] The display panel is configured as described above and further includes a first isolation pattern 81 and a second isolation pattern 82 , so that the first isolation pattern 81 and the second isolation pattern 82 can better prevent the crack from extending into the interior of the display panel.

[0088] An embodiment of the present invention further provides a display device, comprising the display panel provided by the above embodiment.

[0089] Exemplarily, the display panel includes an organic light emitting diode display panel, but is not limited thereto.

[0090] It should be noted that the display device can be any product or component with a display function, such as a television, a monitor, a digital photo frame, a mobile phone, a tablet computer, etc., wherein the display device also includes a flexible circuit board, a printed circuit board and a backplane, etc.

[0091] In the display panel provided in the above embodiment, by providing the conductive isolation column 20 in the isolation area 11, the conductive isolation column 20 can effectively prevent cracks generated when the opening area 12 is formed by a cutting process from extending into the display panel, thereby effectively preventing the occurrence of GDSH defects. Moreover, in the display panel provided by the above embodiment, the conductive isolation column 20 is arranged to be coupled with the fixed potential input terminal, and the insulating layer 30 is arranged to be located on the side of the substrate of the conductive isolation column 20 that is away from the display panel, and the cathode layer 40 is located on the side of the insulating layer 30 that is away from the substrate, and the positive projection of the cathode layer 40 on the substrate at least partially overlaps with the positive projection of the conductive isolation column 20 on the substrate; so that a fixed pressure difference is formed between the cathode layer 40 and the conductive isolation column 20, so that the cathode layer 40, the insulating layer 30 and the conductive isolation column 20 form a parallel plate capacitor with a fixed pressure difference, and the parallel plate capacitor can store anions, cations, etc. from the polarizer and the outside, avoiding corrosion of the encapsulation layer, thereby reducing the transmission path of water vapor and oxygen, etc. to the inside of the display panel, effectively preventing anions and cations from expanding into the inside of the display panel, and reducing the probability of GDSH failure.

[0092] The display device provided by the embodiment of the present invention also has the above-mentioned beneficial effects when it includes the above-mentioned display panel, which will not be described in detail here.

[0093] It should be noted that the signal line extends along a certain direction means that: the signal line includes a main part and a secondary part connected to the main part, the main part is a line, a line segment or a strip-shaped body, the main part extends along a certain direction, and the length of the main part extending along the certain direction is greater than the length of the secondary part extending along other directions.

[0094] It should be noted that the "same layer" in the embodiment of the present invention may refer to a film layer on the same structural layer. Or, for example, a film layer on the same layer may be a film layer for forming a specific pattern formed by the same film forming process, and then the film layer is patterned by the same mask through a single composition process to form a layer structure. Depending on the specific pattern, a single composition process may include multiple exposure, development or etching processes, and the specific pattern in the formed layer structure may be continuous or discontinuous. These specific patterns may also be at different heights or have different thicknesses.

[0095] In the various method embodiments of the present invention, the serial numbers of the steps cannot be used to limit the sequence of the steps. For ordinary technicians in this field, without paying creative work, changes to the sequence of the steps are also within the protection scope of the present invention.

[0096] It should be noted that each embodiment in this 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 differences from other embodiments. In particular, for the method embodiment, since it is basically similar to the product embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the product embodiment.

[0097] Unless otherwise defined, the technical terms or scientific terms used in this disclosure should be understood by people with ordinary skills in the field to which the present invention belongs. "First", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect", "couple" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0098] It will be understood that when an element such as a layer, film, region, or substrate is referred to as being “on” or “under” another element, it can be “directly on” or “under” the other element or intervening elements may be present.

[0099] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0100] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A display panel, characterized in that: The display panel includes a display area, wherein the display area includes a pixel area, an isolation area and an opening area, wherein the isolation area is located between the pixel area and the opening area, and the isolation area surrounds the opening area; and the display panel further includes: substrate substrate; A conductive isolation column, the conductive isolation column is located in the isolation area, and the conductive isolation column is coupled to the fixed potential signal input terminal; an insulating layer, the insulating layer being located on a side of the conductive isolation column facing away from the substrate; A cathode layer, the cathode layer is located on a side of the insulating layer facing away from the base substrate, and an orthographic projection of the cathode layer on the base substrate at least partially overlaps with an orthographic projection of the conductive isolation column on the base substrate; A fixed voltage difference is formed between the cathode layer and the conductive isolation column, and the cathode layer, the insulating layer and the conductive isolation column form a parallel plate capacitor with a fixed voltage difference.

2. The display panel according to claim 1, characterized in that: The display panel further includes: an initialization signal transmission layer, at least a portion of the initialization signal transmission layer being located in the pixel area; A conductive connection structure is coupled to the initialization signal transmission layer, and the conductive connection structure serves as the fixed potential signal input terminal.

3. The display panel according to claim 2, characterized in that: The conductive connection structure comprises: a first conductive connection portion and a second conductive connection portion arranged in different layers, wherein the first conductive connection portion is coupled to the second conductive connection portion; The first conductive connection portion is coupled to the initialization signal transmission layer, and the second conductive connection portion is coupled to the conductive isolation column.

4. The display panel according to claim 3, characterized in that: The display panel further comprises a light shielding layer and a first source-drain metal layer which are sequentially stacked in a direction away from the base substrate; The first conductive connection portion is provided in the same layer and material as the first source-drain metal layer, and the second conductive connection portion is provided in the same layer and material as the light shielding layer.

5. The display panel according to any one of claims 1 to 4, characterized in that: The conductive isolation column includes: a first conductive pattern and a second conductive pattern coupled to each other, the first conductive pattern is located between the second conductive pattern and the base substrate, and the first conductive pattern is coupled to a fixed potential signal input terminal.

6. The display panel according to claim 5, characterized in that: The display panel includes a first source-drain metal layer and a second source-drain metal layer stacked in sequence in a direction away from the base substrate, the first conductive pattern is provided in the same layer and material as the first source-drain metal layer, and the second conductive pattern is provided in the same layer and material as the second source-drain metal layer.

7. The display panel according to claim 1, characterized in that: The display panel further includes: a retaining wall structure, wherein the retaining wall structure is located in the isolation area; At least one inner isolation column, the at least one inner isolation column is located in the isolation area and between the retaining wall structure and the pixel area, and a side surface of the inner isolation column has a notch; At least one outer isolation column is located in the isolation area and between the retaining wall structure and the opening area, and a side surface of the outer isolation column has a notch.

8. The display panel according to claim 7, characterized in that: The display panel includes a plurality of the inner isolation columns, and the display panel also includes a plurality of grooves, along the direction from the pixel area to the opening area, the orthographic projections of the inner isolation columns on the base substrate and the orthographic projections of the grooves on the base substrate are alternately arranged.

9. The display panel according to claim 7, characterized in that: The display panel further includes at least one isolation portion, the isolation portion includes a first isolation pattern and a second isolation pattern, and the first isolation pattern, the second isolation pattern and the corresponding outer isolation column are sequentially stacked in a direction away from the base substrate.

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

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