CN-116645883-B - Display panel and display device

Abstract

The invention provides a display panel and a display device, wherein the display panel comprises a substrate, a plurality of functional layers formed on the substrate and a planarization layer formed above the functional layers, at least one strengthening groove which is mutually communicated in the thickness direction is formed in a preset number of functional layers below the planarization layer, each strengthening groove extends around the display area of the display panel, the material of the planarization layer is filled in the strengthening grooves and forms a plurality of anti-cracking dams which extend around the display area of the display panel, a plurality of metal reinforcing strips which extend along the extending direction of the anti-cracking dams are formed in at least one layer of the preset number of functional layers below the planarization layer, and two sides of each anti-cracking dam are provided with the metal reinforcing strips. In the invention, the metal reinforcing strips are arranged on the two sides of the anti-cracking dam, the blocking effect of the anti-cracking dam on the edge cracks is improved by utilizing the stronger crack blocking capability of the metal reinforcing strips, so that the number of the required anti-cracking dams is reduced, and the product frame of the display device is reduced.

Inventors

• ZHOU LIANG
• WANG WENTAO
• Zhao tianlong
• JIANG FAMING
• GONG WEIXING
• CHEN TENG
• SHI DAWEI

Assignees

• 京东方科技集团股份有限公司
• 重庆京东方显示技术有限公司

Dates

Publication Date

20260505

Application Date

20230530

Claims (8)

1. 1. A display panel comprising a substrate, a plurality of functional layers formed on the substrate, and a planarization layer formed over the plurality of functional layers, wherein at least one reinforcing groove penetrating each other in a thickness direction is formed in a predetermined number of the functional layers under the planarization layer, each reinforcing groove extends around a display area of the display panel, a material of the planarization layer fills in the plurality of reinforcing grooves and forms a plurality of crack prevention bars extending around the display area of the display panel, characterized in that a plurality of metal reinforcing bars extending in an extending direction of the crack prevention bars are formed in at least one layer of the predetermined number of the functional layers under the planarization layer, and both sides of each crack prevention bar are provided with the metal reinforcing bars; The plurality of metal reinforcing strips comprise a plurality of first reinforcing strips and a plurality of second reinforcing strips which are respectively formed in adjacent film layers and are mutually insulated; A group of first reinforcing strips are arranged on one uniform side of each anti-cracking dam, and a group of second reinforcing strips are arranged on the other uniform side of each anti-cracking dam; each group of first reinforcing strips are distributed at equal intervals at preset intervals, each group of second reinforcing strips are distributed at equal intervals at preset intervals, and the first reinforcing strips and the second reinforcing strips on two sides of the anti-cracking dam are staggered by one half of the preset intervals along the extending direction of the anti-cracking dam.
2. 2. The display panel of claim 1, wherein at least one side of each of the anti-cracking dams is provided with a set of the first reinforcing strips spaced around the display area of the display panel, and at least one side of each of the anti-cracking dams is provided with a set of the second reinforcing strips spaced around the display area of the display panel.
3. 3. The display panel according to claim 2, wherein the distribution paths of the plurality of groups of the first reinforcing bars are in one-to-one correspondence with the distribution paths of the plurality of groups of the second reinforcing bars, the orthographic projections of the plurality of first reinforcing bars in each group are staggered from the orthographic projections of the corresponding plurality of second reinforcing bars, and the orthographic projections of each first reinforcing bar are located between two adjacent second reinforcing bars in the corresponding group, and the orthographic projections of each second reinforcing bar are located between two adjacent first reinforcing bars in the corresponding group; the positions of the first reinforcing strips at two sides of each anti-cracking dam are in one-to-one correspondence, and the positions of the second reinforcing strips at two sides of each anti-cracking dam are in one-to-one correspondence.
4. 4. The display panel according to claim 2, wherein the distribution paths of the plurality of groups of the first reinforcing bars are in one-to-one correspondence with the distribution paths of the plurality of groups of the second reinforcing bars, the orthographic projections of the plurality of first reinforcing bars in each group are staggered from the orthographic projections of the corresponding plurality of second reinforcing bars, and the orthographic projections of each first reinforcing bar are located between two adjacent second reinforcing bars in the corresponding group, and the orthographic projections of each second reinforcing bar are located between two adjacent first reinforcing bars in the corresponding group; the first reinforcing strips on two sides of each anti-cracking dam are in one-to-one correspondence with the second reinforcing strips on the opposite sides.
5. 5. The display panel according to any one of claims 1 to 4, wherein the material of the metal reinforcing bar includes at least one of molybdenum, aluminum, copper, and titanium.
6. 6. The display panel according to any one of claims 1 to 4, wherein a length of the metal reinforcing strip in an extending direction of the crack prevention dam is 5 μm to 20 μm.
7. 7. The display panel according to any one of claims 1 to 4, wherein the width of the metal reinforcing strip in a direction perpendicular to the crack prevention dam is 1 μm to 6 μm.
8. 8. A display device characterized in that the display device comprises the display panel according to any one of claims 1 to 7.

Description

Display panel and display device Technical Field The present invention relates to the field of display devices, and in particular, to a display panel and a display device. Background With the high demands of users, display products are also continually being designed towards limits, and narrow borders have been of interest to customers for excellent user experience. In terms of design, the implementation manner of the narrow frame mainly comprises line width/line interval reduction, wiring/IJP transfer hole distance compression and the like. As shown in fig. 1, in the related art, an edge of a display Panel (Panel) is generally designed with a Crack Dam B (Crack Dam) for preventing cracks (Crack) generated at the edge of the display Panel from extending to an AA area (i.e., display area) to affect a normal display function of the display Panel, and the Crack Dam B is designed to surround on/left/right boundaries of the Panel. As shown in fig. 2, the conventional anti-cracking dam B generally uses an etching (Etch) process to form a trench in the inorganic layers at the edge and fills the trench with the material of the planarization layer 200 (Planarization layer, PLN) to form the anti-cracking dam 210, so as to achieve the effect of preventing cracks from extending with the film layer. However, the blocking effect on cracks by the scheme of forming the anti-cracking dams by grooving and filling in the inorganic layer is still limited, so that in order to ensure the anti-cracking effect, a certain number of anti-cracking dams need to be formed in design, and the multi-layer anti-cracking dams are stacked at the edge of the display panel, so that the width of the area where the anti-cracking dam B is located is seriously increased, and the difficulty of realizing a narrow frame is greatly improved. Disclosure of Invention The invention aims to provide a display panel, which has stronger blocking effect on edge cracks by the anti-cracking dams and can reduce the number of the required anti-cracking dams and reduce the product frame of a display device. In order to achieve the above object, as a first aspect of the present invention, there is provided a display panel including a substrate, a plurality of functional layers formed on the substrate, and a planarization layer formed over the plurality of functional layers, at least one reinforcing groove penetrating each other in a thickness direction being formed in a predetermined number of the functional layers under the planarization layer, each of the reinforcing grooves extending around a display area of the display panel, a material of the planarization layer filling in the plurality of reinforcing grooves and forming a plurality of Crack dams (Crack Dam) extending around the display area of the display panel, a plurality of metal reinforcing bars extending in an extending direction of the Crack dams being formed in at least one of the predetermined number of the functional layers under the planarization layer, and the metal reinforcing bars being provided on both sides of each of the Crack dams. As an alternative embodiment of the present invention, the plurality of metal reinforcing bars includes a plurality of first reinforcing bars and a plurality of second reinforcing bars respectively formed in adjacent film layers and insulated from each other. As an optional embodiment of the present invention, at least one side of each of the anti-cracking dams is provided with a set of the first reinforcing strips spaced around the display area of the display panel, and at least one side of each of the anti-cracking dams is provided with a set of the second reinforcing strips spaced around the display area of the display panel. As an optional implementation manner of the present invention, the distribution paths of the plurality of groups of the first reinforcing strips are in one-to-one correspondence with the distribution paths of the plurality of groups of the second reinforcing strips, the orthographic projections of the plurality of first reinforcing strips in each group are staggered with the orthographic projections of the corresponding plurality of second reinforcing strips, the orthographic projection of each first reinforcing strip is located between two adjacent second reinforcing strips in the corresponding group, and the orthographic projection of each second reinforcing strip is located between two adjacent first reinforcing strips in the corresponding group; the positions of the first reinforcing strips at two sides of each anti-cracking dam are in one-to-one correspondence, and the positions of the second reinforcing strips at two sides of each anti-cracking dam are in one-to-one correspondence. As an optional implementation manner of the present invention, the distribution paths of the plurality of groups of the first reinforcing strips are in one-to-one correspondence with the distribution paths of the plurality of groups of the second reinforcin