Display panel, display device

Abstract

This invention provides a display panel and a display device. The display panel includes a substrate, multiple functional layers formed on the substrate, and a planarization layer formed above the multiple functional layers. A predetermined number of functional layers below the planarization layer each have at least one mutually penetrating reinforcing groove along the thickness direction. Each reinforcing groove extends around the display area of ​​the display panel. The material of the planarization layer fills the multiple reinforcing grooves and forms multiple anti-crack dams extending around the display area of ​​the display panel. At least one of the predetermined number of functional layers below the planarization layer has multiple metal reinforcing strips extending along the extension direction of the anti-crack dams, and each anti-crack dam has metal reinforcing strips on both sides. In this invention, the metal reinforcing strips on both sides of the anti-crack dams enhance the anti-crack dam's ability to block edge cracks by utilizing the stronger crack-blocking capability of the metal reinforcing strips, thereby reducing the number of anti-crack dams required and reducing the product bezel of the display device.

Description

Technical Field

[0001] This invention relates to the field of display devices, and more specifically, to a display panel and a display device. Background Technology

[0002] As users demand higher standards, display products are constantly pushing the boundaries of design, with narrow bezels consistently attracting customer attention due to their superior user experience. In terms of design, achieving narrow bezels primarily involves reducing line width / spacing and compressing the distance between traces / IJP adapter holes.

[0003] like Figure 1 As shown, in related technologies, display panels typically have crack dams (B) along their edges. These crack dams prevent cracks at the panel edges from extending into the AA area (display area) and affecting the normal display function. The crack dams (B) are designed to surround the panel's top / left / right boundaries. Figure 2 As shown, existing crack-resistant dams B often use an etching process to form grooves in several inorganic layers at the edge, and then fill the grooves with the material of the planarization layer (PLN) to form crack-resistant dam 210, so as to prevent cracks from extending with the film layer.

[0004] However, the method of creating anti-crack dams by digging and filling grooves in the inorganic layer still has limited effect on blocking cracks. Therefore, in order to ensure the anti-crack effect, it is necessary to ensure that a certain number of anti-crack dams are formed during the design. The stacking of multiple anti-crack dams at the edge of the display panel seriously increases the width of the area where anti-crack dam B is located, greatly increasing the difficulty of achieving a narrow bezel. Summary of the Invention

[0005] The present invention aims to provide a display panel with a crack-resistant dam that is more effective at blocking edge cracks, thereby reducing the number of crack-resistant dams required and reducing the product bezel of the display device.

[0006] To achieve the above objectives, as a first aspect of the present invention, a display panel is provided, the display panel including a substrate, a plurality of functional layers formed on the substrate, and a planarization layer formed above the plurality of functional layers. At least one reinforcing groove is formed in each of a predetermined number of functional layers below the planarization layer, and each reinforcing groove extends around a display area of ​​the display panel. Material of the planarization layer fills the plurality of reinforcing grooves and forms a plurality of crack dams extending around the display area of ​​the display panel. At least one of the predetermined number of functional layers below the planarization layer has a plurality of metal reinforcing strips extending along the extension direction of the crack dams, and the metal reinforcing strips are provided on both sides of each crack dam.

[0007] As an optional embodiment of the present invention, the plurality of metal reinforcing strips include a plurality of first reinforcing strips and a plurality of second reinforcing strips respectively formed in adjacent film layers and insulated from each other.

[0008] As an optional embodiment of the present invention, at least one side of each of the anti-crack dams is provided with a set of first reinforcing strips spaced apart around the display area of ​​the display panel, and at least one side of each of the anti-crack dams is provided with a set of second reinforcing strips spaced apart around the display area of ​​the display panel.

[0009] As an optional embodiment of the present invention, the distribution paths of the multiple sets of first reinforcing strips correspond one-to-one with the distribution paths of the multiple sets of second reinforcing strips. The orthographic projections of the multiple first reinforcing strips in each set are offset from the orthographic projections of the corresponding multiple second reinforcing strips. The orthographic projection of each first reinforcing strip is located between two adjacent second reinforcing strips in the corresponding set, and the orthographic projection of each second reinforcing strip is located between two adjacent first reinforcing strips in the corresponding set.

[0010] The positions of the first reinforcing strips on both sides of each crack-prevention dam correspond one-to-one, and the positions of the second reinforcing strips on both sides of each crack-prevention dam also correspond one-to-one.

[0011] As an optional embodiment of the present invention, the distribution paths of the multiple sets of first reinforcing strips correspond one-to-one with the distribution paths of the multiple sets of second reinforcing strips. The orthographic projections of the multiple first reinforcing strips in each set are offset from the orthographic projections of the corresponding multiple second reinforcing strips. The orthographic projection of each first reinforcing strip is located between two adjacent second reinforcing strips in the corresponding set, and the orthographic projection of each second reinforcing strip is located between two adjacent first reinforcing strips in the corresponding set.

[0012] The first reinforcing strip on each side of the anti-cracking dam corresponds one-to-one with the position of the second reinforcing strip on the opposite side.

[0013] As an optional embodiment of the present invention, each of the anti-cracking dams is provided with a set of the first reinforcing strips on one side and a set of the second reinforcing strips on the other side;

[0014] Each group of first reinforcing strips is distributed at equal intervals with a preset spacing, and each group of second reinforcing strips is distributed at equal intervals with the preset spacing. The first reinforcing strips and second reinforcing strips on both sides of the crack-prevention dam are offset by half of the preset spacing along the extension direction of the crack-prevention dam.

[0015] As an optional embodiment of the present invention, the material of the metal reinforcing strip includes at least one of molybdenum (Mo), aluminum (Al), copper (Cu), and titanium (Ti).

[0016] As an optional embodiment of the present invention, the length of the metal reinforcing strip along the extension direction of the crack-prevention dam is 5μm to 20μm.

[0017] As an optional embodiment of the present invention, the width of the metal reinforcing strip along the direction perpendicular to the crack-prevention dam is 1μm to 6μm.

[0018] As an optional embodiment of the present invention, a predetermined number of functional layers below the planarization layer include a first gate insulating layer (GI1), a second gate insulating layer (GI2) stacked on the first gate insulating layer, and an interlayer dielectric layer (ILD) stacked on the second gate insulating layer.

[0019] The first reinforcing strip is formed on the first gate insulating layer, and the second reinforcing strip is formed on the second gate insulating layer.

[0020] As an optional embodiment of the present invention, a predetermined number of functional layers below the planarization layer further include a passivation layer (PVX) stacked between the interlayer dielectric layer (ILD) and the planarization layer (PLN).

[0021] As an optional embodiment of the present invention, a first insulating layer (BR1), an amorphous silicon layer (a-Si), and an encapsulation layer (PI2) are sequentially stacked on the substrate.

[0022] As an optional embodiment of the present invention, a predetermined number of functional layers below the planarization layer further include a second insulating layer (BR2) and a buffer layer (BUF) sequentially stacked on the encapsulation layer.

[0023] As a second aspect of the present invention, a display device is provided, the display device comprising the display panel provided by the present invention.

[0024] As a third aspect of the present invention, a method for manufacturing a display panel is provided, for manufacturing the display panel provided by the present invention, the method for manufacturing the display panel comprising:

[0025] Multiple functional layers are formed on the substrate, and at least one of the predetermined number of functional layers at the top is provided with multiple metal reinforcing strips extending around the display area of ​​the display panel.

[0026] At least one reinforcing groove is formed in the thickness direction in a predetermined number of the functional layers at the top, wherein each of the reinforcing grooves extends around the display area of ​​the display panel;

[0027] A planarization layer is formed on the multiple functional layers, and multiple reinforcement grooves are filled to form multiple anti-crack dams extending around the display area of ​​the display panel.

[0028] In the display panel, display device, and display panel manufacturing method provided by the present invention, metal reinforcing strips are provided on both sides of each anti-crack dam, and the metal reinforcing strips extend along the extension direction of the anti-crack dam. This utilizes the stronger crack blocking ability of the metal reinforcing strips to further enhance the blocking effect of the anti-crack dam and related structures on edge cracks. As a result, the number of anti-crack dams required can be reduced under the same crack prevention requirements. While ensuring the strength of the edge structure of the display panel, the width of the area occupied by the anti-crack dam is further reduced, thereby reducing the product bezel of the display device and improving the aesthetics of the display device product. Attached Figure Description

[0029] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0030] Figure 1 This is a schematic diagram of the structure of a display panel in related technologies;

[0031] Figure 2 This is a schematic diagram of the film layer structure of a display panel in related technologies;

[0032] Figure 3 This is a top view of a display panel provided in one embodiment of the present invention;

[0033] Figure 4 yes Figure 3 A schematic diagram of the film layer structure of the display panel;

[0034] Figure 5 This is a top view of the display panel provided in another embodiment of the present invention;

[0035] Figure 6 yes Figure 5A schematic diagram of the film layer structure of the display panel;

[0036] Figure 7 This is a top view of the display panel provided in another embodiment of the present invention;

[0037] Figure 8 yes Figure 7 A schematic diagram of the film layer structure of the display panel.

[0038] Explanation of reference numerals in the attached figures:

[0039] 110: First gate insulating layer

[0040] 111: First reinforcing strip

[0041] 121: Second reinforcing strip

[0042] 120: Second gate insulating layer

[0043] 200: Planarization layer

[0044] 210: Crack-prevention dam

[0045] 300: Passivation layer

[0046] 400: Interlayer dielectric layer

[0047] 500: Buffer layer

[0048] 610: First insulating layer

[0049] 620: Second insulating layer

[0050] 710: Substrate

[0051] 720: Encapsulation layer

[0052] 800: Amorphous silicon layer Detailed Implementation

[0053] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0054] To address the aforementioned technical problems, as a first aspect of the present invention, a display panel is provided, such as... Figures 3 to 8As shown, the display panel includes a substrate 710, a plurality of functional layers formed on the substrate 710, and a planarization layer 200 (PLN) formed above the plurality of functional layers. A predetermined number of functional layers below the planarization layer 200 each have at least one reinforcing groove that penetrates each other along the thickness direction. Each reinforcing groove extends around the display area of ​​the display panel. The material of the planarization layer 200 fills the plurality of reinforcing grooves and forms a plurality of crack dams 210 extending around the display area of ​​the display panel. At least one of the predetermined number of functional layers below the planarization layer 200 has a plurality of metal reinforcing strips (e.g., a first reinforcing strip 111, a second reinforcing strip 121) extending along the extension direction of the crack dams 210, and the metal reinforcing strips are provided on both sides of each crack dam 210.

[0055] The display panel provided by the present invention has at least one anti-crack dam 210 formed therein, and each anti-crack dam 210 has metal reinforcing strips on both sides, and the metal reinforcing strips extend along the extension direction of the anti-crack dam 210. In this way, the metal reinforcing strips have a stronger crack blocking ability, thereby further improving the anti-crack dam 210 and related structures' blocking effect on edge cracks. As a result, the number of anti-crack dams 210 required can be reduced under the same anti-crack requirements. While ensuring the strength of the edge structure of the display panel, the width of the area occupied by the anti-crack dam 210 is further reduced, thereby reducing the product bezel of the display device and improving the aesthetics of the display device product.

[0056] Through experiments, the inventors of this invention have verified that even if the number of anti-crack dams 210 is reduced to 1 to 2 in the display device using the display panel structure provided in the embodiments of this invention, the anti-crack strength requirements of existing products can still be met.

[0057] As an optional embodiment of the present invention, such as Figure 4 , Figure 6 , Figure 8 As shown, the plurality of metal reinforcing strips include a plurality of first reinforcing strips 111 and a plurality of second reinforcing strips 121 that are respectively formed in adjacent film layers and are insulated from each other.

[0058] As an optional embodiment of the present invention, such as Figures 3 to 8 As shown, each of the anti-crack dams 210 has at least one side provided with a set of first reinforcing strips 111 spaced around the display area of ​​the display panel, and each of the anti-crack dams 210 has at least one side provided with a set of second reinforcing strips 121 spaced around the display area of ​​the display panel.

[0059] As a preferred embodiment of the present invention, such as Figures 3 to 4 , Figures 5 to 6 , Figures 7 to 8 As shown, the orthographic projection of the first reinforcing strip 111 (i.e., the projection on the light-emitting surface or substrate of the display panel) is staggered from the orthographic projection of the corresponding plurality of second reinforcing strips 121, so as to avoid the formation of capacitance between the first reinforcing strip 111 and the second reinforcing strip 121, thereby alleviating the accumulation of charge on the metal reinforcing strip.

[0060] As an optional embodiment of the present invention, such as Figure 3 , Figure 4 As shown, the distribution paths of multiple sets of first reinforcing strips 111 correspond one-to-one with the distribution paths of multiple sets of second reinforcing strips 121. The orthographic projections of multiple first reinforcing strips 111 in each set are offset from the orthographic projections of the corresponding multiple second reinforcing strips 121. The orthographic projection of each first reinforcing strip 111 is located between two adjacent second reinforcing strips 121 in the corresponding set, and the orthographic projection of each second reinforcing strip 121 is located between two adjacent first reinforcing strips 111 in the corresponding set.

[0061] The positions of the first reinforcing strips 111 on both sides of each of the anti-cracking dams 210 are one-to-one, and the positions of the second reinforcing strips 121 on both sides of each of the anti-cracking dams 210 are one-to-one.

[0062] As another optional embodiment of the present invention, such as Figure 5 , Figure 6 As shown, in an optional embodiment of the present invention, the distribution paths of multiple sets of first reinforcing strips 111 correspond one-to-one with the distribution paths of multiple sets of second reinforcing strips 121. The orthographic projections of multiple first reinforcing strips 111 in each set are offset from the orthographic projections of the corresponding multiple second reinforcing strips 121. The orthographic projection of each first reinforcing strip 111 is located between two adjacent second reinforcing strips 121 in the corresponding set, and the orthographic projection of each second reinforcing strip 121 is located between two adjacent first reinforcing strips 111 in the corresponding set.

[0063] The first reinforcing strip 111 on both sides of each of the anti-cracking dams 210 corresponds one-to-one with the position of the second reinforcing strip 121 on the opposite side.

[0064] As another optional embodiment of the present invention, such as Figure 7 , Figure 8 As shown, each of the anti-crack dams 210 is provided with a set of the first reinforcing strips 111 on one side and a set of the second reinforcing strips 121 on the other side;

[0065] Each group of first reinforcing strips 111 is distributed at a preset interval, and each group of second reinforcing strips 121 is distributed at the same preset interval. The first reinforcing strips 111 and the second reinforcing strips 121 on both sides of the crack-prevention dam 210 are offset by half the preset interval along the extension direction of the crack-prevention dam 210.

[0066] As an optional embodiment of the present invention, the material of the metal reinforcing strip includes at least one of molybdenum (Mo), aluminum (Al), copper (Cu), and titanium (Ti).

[0067] To mitigate the accumulation of charge on the metal reinforcing strip, in a preferred embodiment of the present invention, the length of the metal reinforcing strip needs to be relatively short. For example, in an optional embodiment of the present invention, the length of the metal reinforcing strip along the extension direction of the anti-crack dam 210 is 5μm to 20μm.

[0068] As an optional embodiment of the present invention, the width of the metal reinforcing strip along the direction perpendicular to the crack-prevention dam 210 is 1μm to 6μm.

[0069] As an optional embodiment of the present invention, a predetermined number of functional layers below the planarization layer 200 include a first gate insulating layer 110 (Gate Insulator, GI), a second gate insulating layer 120 stacked on the first gate insulating layer 110, and an interlayer dielectric layer 400 (ILD) stacked on the second gate insulating layer 120.

[0070] The first reinforcing strip 111 is formed on the first gate insulating layer 110, and the second reinforcing strip 121 is formed on the second gate insulating layer 120.

[0071] As an optional embodiment of the present invention, a predetermined number of functional layers below the planarization layer 200 further include a passivation layer 300 (PVX) stacked between the interlayer dielectric layer 400 and the planarization layer 200.

[0072] As an optional embodiment of the present invention, a first insulating layer 610 (Barrier), an amorphous silicon layer 800 (a-Si) and an encapsulation layer 720 are sequentially stacked on the substrate 710.

[0073] As an optional embodiment of the present invention, the material of the first insulating layer 610 includes silicon oxide (SiO2). x ).

[0074] As an optional embodiment of the present invention, a predetermined number of functional layers below the planarization layer 200 further include a second insulating layer 620 and a buffer layer 500 (BUF) sequentially stacked on the encapsulation layer 720.

[0075] As an optional embodiment of the present invention, the material of the second insulating layer 620 includes silicon oxide.

[0076] As an optional embodiment of the present invention, the substrate 710 and the encapsulation layer 720 are made of polyimide (PI).

[0077] As a second aspect of the present invention, a display device is provided, the display device comprising the display panel provided by the present invention.

[0078] The display panel provided by the present invention has at least one anti-crack dam 210 formed therein, and each anti-crack dam 210 has metal reinforcing strips on both sides, and the metal reinforcing strips extend along the extension direction of the anti-crack dam 210. In this way, the metal reinforcing strips have a stronger crack blocking ability, thereby further improving the anti-crack dam 210 and related structures' blocking effect on edge cracks. As a result, the number of anti-crack dams 210 required can be reduced under the same anti-crack requirements. While ensuring the strength of the edge structure of the display panel, the width of the area occupied by the anti-crack dam 210 is further reduced, thereby reducing the product bezel of the display device and improving the aesthetics of the display device product.

[0079] Through experiments, the inventors of this invention have verified that even if the number of anti-crack dams 210 is reduced to 1 to 2 in the display device using the structure provided in the embodiments of this invention, it can still meet the anti-crack strength requirements of existing products.

[0080] As a third aspect of the present invention, a method for manufacturing a display panel is provided, for manufacturing the display panel provided by the present invention, the method for manufacturing the display panel comprising:

[0081] Multiple functional layers are formed on the substrate 710, and at least one of the predetermined number of functional layers at the top is provided with multiple metal reinforcing strips extending around the display area of ​​the display panel.

[0082] At least one reinforcing groove is formed in the thickness direction in a predetermined number of the functional layers at the top, wherein each of the reinforcing grooves extends around the display area of ​​the display panel;

[0083] A planarization layer 200 is formed on the plurality of functional layers, and a plurality of reinforcement grooves are filled to form a plurality of anti-crack dams 210 extending around the display area of ​​the display panel.

[0084] In the display panel manufactured using the method provided by the present invention, each anti-crack dam 210 is provided with metal reinforcing strips on both sides, and the metal reinforcing strips extend along the extension direction of the anti-crack dam 210. This utilizes the stronger crack-blocking ability of the metal reinforcing strips to further enhance the anti-crack dam 210 and related structures' ability to block edge cracks. Consequently, the number of anti-crack dams 210 required can be reduced under the same crack-proof requirements. While ensuring the strength of the edge structure of the display panel, the width of the area occupied by the anti-crack dam 210 is further reduced, thereby reducing the product bezel of the display device and improving the aesthetics of the display device.

[0085] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A display panel, the display panel comprising a substrate, a plurality of functional layers formed on the substrate, and a planarization layer formed above the plurality of functional layers, wherein at least one reinforcing groove is formed in each of a predetermined number of functional layers below the planarization layer, each reinforcing groove extending around a display area of ​​the display panel, and the material of the planarization layer fills the plurality of reinforcing grooves to form a plurality of anti-crack dams extending around the display area of ​​the display panel, characterized in that, At least one of the predetermined number of functional layers below the planarization layer is provided with a plurality of metal reinforcing strips extending along the extension direction of the crack-prevention dam, and the metal reinforcing strips are provided on both sides of each crack-prevention dam. The plurality of metal reinforcing strips include a plurality of first reinforcing strips and a plurality of second reinforcing strips respectively formed in adjacent film layers and insulated from each other; Each of the aforementioned crack-resistant dams is provided with a set of the first reinforcing strips on one side and a set of the second reinforcing strips on the other side; Each group of first reinforcing strips is distributed at equal intervals with a preset spacing, and each group of second reinforcing strips is distributed at equal intervals with the preset spacing. The first reinforcing strips and second reinforcing strips on both sides of the crack-prevention dam are offset by half of the preset spacing along the extension direction of the crack-prevention dam.

2. The display panel according to claim 1, characterized in that, Each of the crack-prevention dams has at least one side provided with a set of first reinforcing strips spaced apart around the display area of ​​the display panel, and each of the crack-prevention dams has at least one side provided with a set of second reinforcing strips spaced apart around the display area of ​​the display panel.

3. The display panel according to claim 2, characterized in that, The distribution paths of multiple sets of first reinforcing strips correspond one-to-one with the distribution paths of multiple sets of second reinforcing strips. The orthographic projections of multiple first reinforcing strips in each set are offset from the orthographic projections of the corresponding multiple second reinforcing strips. Furthermore, the orthographic projection of each first reinforcing strip is located between two adjacent second reinforcing strips in the corresponding set, and the orthographic projection of each second reinforcing strip is located between two adjacent first reinforcing strips in the corresponding set. The positions of the first reinforcing strips on both sides of each crack-prevention dam correspond one-to-one, and the positions of the second reinforcing strips on both sides of each crack-prevention dam also correspond one-to-one.

4. The display panel according to claim 2, characterized in that, The distribution paths of multiple sets of first reinforcing strips correspond one-to-one with the distribution paths of multiple sets of second reinforcing strips. The orthographic projections of multiple first reinforcing strips in each set are offset from the orthographic projections of the corresponding multiple second reinforcing strips. Furthermore, the orthographic projection of each first reinforcing strip is located between two adjacent second reinforcing strips in the corresponding set, and the orthographic projection of each second reinforcing strip is located between two adjacent first reinforcing strips in the corresponding set. The first reinforcing strip on each side of the anti-cracking dam corresponds one-to-one with the position of the second reinforcing strip on the opposite side.

5. The display panel according to any one of claims 1 to 4, characterized in that, The metal reinforcing strip is made of at least one of molybdenum, aluminum, copper, and titanium.

6. The display panel according to any one of claims 1 to 4, characterized in that, The length of the metal reinforcing strip along the extension direction of the crack-prevention dam is 5μm to 20μm.

7. The display panel according to any one of claims 1 to 4, characterized in that, The width of the metal reinforcing strip along the direction perpendicular to the crack-prevention dam is 1μm to 6μm.

8. A display device, characterized in that, The display device includes the display panel as described in any one of claims 1 to 7.

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