Display panel and display device

Abstract

The utility model provides a display panel and a display device, belongs to the technical field of display, and aims to eliminate frame type mura on the periphery of the display panel. The second substrate is arranged opposite to the first substrate, the second substrate comprises a display area and a frame area surrounding the display area, and the frame area comprises a first area and a plurality of second areas except the first area; wherein in the first area, one side, close to the first substrate, of the second substrate comprises a fan-out structure; the thickness adjusting structure is located in the frame area and located between the first substrate and the second substrate; the thickness adjusting structure enables the distance between the first substrate and the second substrate in the second area to be consistent with the distance between the first substrate and the second substrate in the first area.

Description

Technical Field

[0001] The present disclosure relates to the field of display technologies, and particularly to a display panel and a display device. Background Art

[0002] Currently, VR (Virtual Reality) LCD (Liquid Crystal Display) products have small sizes and small peripheral pitches. The peripheral metal wires are arranged in a very narrow area, and the wiring patterns are often complex and variable. However, current VR LCDs always have the problem of peripheral frame-type mura, that is, uneven peripheral brightness. Summary of the Utility Model

[0003] Based on the content of the background art, the present disclosure provides a display panel and a display device.

[0004] In a first aspect of the present disclosure, a display panel is provided, including:

[0005] A first substrate;

[0006] A second substrate disposed opposite to the first substrate, the second substrate including a display area and a border area surrounding the display area, the border area including a first area and a plurality of second areas other than the first area; wherein, in the first area, a side of the second substrate close to the first substrate includes a fan-out structure;

[0007] And a thickness adjustment structure located in the border area and between the first substrate and the second substrate;

[0008] Wherein, the thickness adjustment structure makes the distance between the first substrate and the second substrate in the second area the same as that in the first area.

[0009] Optionally, it further includes:

[0010] An encapsulation adhesive located between the first substrate and the second substrate, and a positive projection of the encapsulation adhesive on the second substrate is located in the border area;

[0011] Wherein, the positive projection of the encapsulation adhesive on the second substrate overlaps with the positive projection of the thickness adjustment structure on the second substrate.

[0012] Optionally, the thickness adjustment structure includes spacers, and a positive projection of the spacers on the second substrate

[0013] is located in the plurality of second areas;

[0014] Among them, the size of the spacer in the target direction is equal to the size of the fan-out structure in the target direction, and the target direction is the direction perpendicular to the second substrate.

[0015] Optionally, the material of the spacer is the same as the material of the fan-out structure.

[0016] Optionally, in the same second region, there are multiple spacers, and the density of the multiple spacers in the second region is the same as the density of the fan-out structure in the first region.

[0017] Optionally, the volume ratio of each spacer in the corresponding second region is equal to the volume ratio of the fan-out structure in the first region.

[0018] Optionally, it further includes:

[0019] An encapsulant, located between the first substrate and the second substrate and in the border area;

[0020] Among them, all or part of the surface of the spacer close to the encapsulant is in direct contact with the encapsulant.

[0021] Optionally, the thickness adjustment structure includes elastic microspheres, and the maximum deformation of the elastic microspheres is greater than or equal to the difference between the distance between the first substrate and the second substrate in the first region and the distance in the second region.

[0022] Optionally, the elastic microspheres are filled in the encapsulant.

[0023] Optionally, the orthographic projection of the elastic microspheres on the second substrate is located in the first region and the multiple second regions.

[0024] Optionally, when the thickness adjustment structure includes the spacer, the sum of the deformation of the elastic microspheres and the size of the spacer in the target direction is equal to the size of the fan-out structure in the target direction.

[0025] Optionally, the elastic microspheres are polymer microspheres.

[0026] The display panel provided by an embodiment of the present disclosure includes: a first substrate; a second substrate disposed opposite to the first substrate, the second substrate including a display area and a border area surrounding the display area, the border area including a first area and a plurality of second areas other than the first area; wherein, in the first area, a side of the second substrate close to the first substrate includes a fan-out structure; and, a thickness adjustment structure located in the border area and between the first substrate and the second substrate; wherein, the thickness adjustment structure makes the distance between the first substrate and the second substrate in the second area consistent with the distance between them in the first area; thus, by adjusting the distance between the first substrate and the second substrate in the second area through the thickness adjustment structure, the distance between the first substrate and the second substrate in the first area is made consistent, so that it is possible to avoid the problem that there is a fan-out structure in the first area while there is no fan-out structure in the plurality of second areas, resulting in different distances between the first substrate and the second substrate in the first area and the second area, and further causing uneven thickness of the liquid crystal cell in the display area.

[0027] The above description is only an overview of the technical solution of the present disclosure. In order to be able to understand the technical means of the present disclosure more clearly, it can be implemented according to the content of the specification. And in order to make the above and other objects, features and advantages of the present disclosure more obvious and understandable, the specific embodiments of the present disclosure are specifically exemplified below. Brief Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the following will briefly introduce the drawings required to be used in the description of the embodiments or related technologies. Obviously, the drawings in the following description are some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings. It should be noted that the ratios in the drawings are only for illustration and do not represent the actual ratios.

[0029] Figure 1 Shows a top view of a display panel in the related art and SEM images of the positions of each border area of the display panel;

[0030] Figure 2 Shows a cross-sectional view of a display panel near the GOA side and the DO side in the case of using 3.2 μm silicon spheres as supports;

[0031] Figure 3 Shows a cross-sectional view of a display panel near the DP side in the case of using 3.7 μm silicon spheres as supports;

[0032] Figure 4 Shows a top view of the display panel provided by an embodiment of the present disclosure;

[0033] Figure 5 shows Figure 4 a cross-sectional view of the display panel in

[0034] Figure 6 shows a cross-sectional view of a display panel provided by another embodiment of the present disclosure;

[0035] Figure 7 shows a cross-sectional view of a display panel provided by another embodiment of the present disclosure;

[0036] Figure 8 shows a schematic diagram of the patterns of SD and SD PAD on different sides of the second substrate in an embodiment of the present disclosure;

[0037] Figure 9 shows the SD pattern and the SD PAD pattern on different sides of the second substrate in an embodiment of the present disclosure

[0038] stacked schematic diagram;

[0039] Figure 10 shows a schematic diagram of the patterns of SD and GATE2 on different sides of the second substrate in an embodiment of the present disclosure;

[0040] Explanation of reference numerals: 1, the first substrate; 2, the second substrate; 21, the display area; 22, the border area; 221, the first area; 2211, the fan-out structure; 222, the second area; 3, the thickness adjustment structure; 31, the spacer; 32, the elastic microsphere; 4, the encapsulation glue. Detailed implementation manners

[0041] To make the above objects, features, and advantages of the present disclosure more obvious and understandable, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present disclosure.

[0042] Virtual reality liquid crystal display (VR LCD) products are usually small in size, have narrow borders, and the peripheral metal wiring is restricted in a relatively narrow area, which leads to the need for the peripheral height and the display area height to be precisely the same in product design. However, there is a problem of mura around the display area in VR LCD products, and this mura defect cannot be solved by adjusting the total amount of liquid crystal in the liquid crystal cell or the size of the silicon spheres in the encapsulation glue. This mura defect is specifically the defect caused by uneven brightness and uneven chromaticity.

[0043] Through defect analysis, it is known that the mura defect problem is caused by the step difference at various peripheral positions of the array substrate: Refer to Figure 1 , Figure 1 which shows the electron microscope scanning images of various peripheral positions of the array substrate. As shown in Figure 1 , the left figure is a schematic structural diagram of the array substrate, and the AA (Active Area, priority display area) area represents the display area. The right figure is the electron microscope scanning images at different positions at the position where the array substrate contacts the encapsulation glue. According to Figure 1 , the thickness of the DP (Data Pad) side of the array substrate is 3.38 μm, the thickness of the GOA (Gate Driver on Array) side is 2.86 μm, and the thickness of the DO (Data Out) side is 2.76 μm. Therefore, the fan-out structure on the DP side of the array substrate makes this peripheral position 0.5 - 0.6 μm higher than the GOA side and the DO side.

[0044] In this case, when using 3.2 - μm silicon balls to support at the position of the encapsulation glue, as shown in Figure 2 , Figure 2 which shows the cross-sectional schematic diagram of the display panel near the GOA side or the DO side when the encapsulation glue is filled with 3.2 - μm - diameter silicon balls. According to Figure 2 , since the silicon ball size is small on the DO side and the GOA side, the edge cell thickness is low, which causes the two glass substrates to warp due to stress at the position between the edge and the center of the display area. This results in the cell thickness at the edge of the display area near the GOA side and the DO side being lower than that at the edge of the display area near the DP side and lower than the cell thickness at the center of the display area. Furthermore, in the VR LCD product, the brightness of the display area near the DP side is normal, while frame mura appears on the DO and GOA sides.

[0045] When using 3.7 - μm silicon balls to support at the position of the encapsulation glue, as shown in Figure 3 , Figure 3 which shows the cross-sectional schematic diagram of the display panel near the DP side when the encapsulation glue is filled with 3.2 - μm - diameter silicon balls. According to Figure 3 , since the silicon ball size is large on the DP side, the edge cell thickness is high, which makes the brightness at the edge of the display area higher than that at the center position. Furthermore, in the VR LCD product, the brightness of the DP side is high, while the brightness of the GOA side and the DO side is normal.

[0046] In view of this, the present disclosure provides a display panel and a display device. By providing a thickness adjustment structure in the border area between the array substrate and the color filter substrate, the thickness adjustment structure is used to adjust the distance between the array substrate and the color filter substrate in the corresponding position areas on the GOA side and the DO side to be the same as the distance between the array substrate and the color filter substrate in the corresponding position area on the DP side, so that the height around the display area is consistent, thereby eliminating the frame-shaped mura around the display area.

[0047] Referring to Figure 4 and Figure 5 , Figure 4 FIG. 1 shows a schematic structural diagram of a display panel provided by an embodiment of the present disclosure. Figure 5 FIG. 2 shows Figure 4 a cross-sectional view of the display panel in Figure 4 and Figure 5 As shown, the display panel specifically includes:

[0048] a first substrate 1;

[0049] a second substrate 2 disposed opposite to the first substrate. The second substrate 2 includes a display area 21 and a border area 22 surrounding the display area 21. The border area 22 includes a first area 221 and a plurality of second areas 222 other than the first area 221. Among them, in the first area 221, a side of the second substrate 2 close to the first substrate 1 includes a fan-out structure 2211;

[0050] and a thickness adjustment structure 3, which is located in the border area 22 and between the first substrate 1 and the second substrate 2;

[0051] wherein, the thickness adjustment structure 3 makes the distance between the first substrate 1 and the second substrate 2 in the second area 222 the same as the distance in the first area 221.

[0052] In this embodiment, the first substrate 1 is a color filter substrate, the second substrate 2 is an array substrate, the first area 221 represents the area where the DP (Data Pad) side of the array substrate is located, the second area 222 is the area where the GOA (Gate Driver on Array) side and the DO (Data Out) side of the array substrate are located, and the fan-out structure 2211 is a metal routing structure of the array substrate 2, which can be metal routings such as SD (source drain), SD PAD (source drain pad), etc., and can also be metal routings of SD and gate2 (gate electrode). The thickness adjustment structure 3 is used to reduce the gap between the second substrate 2 and the first substrate 1 in the second area 222.

[0053] Among them, the GOA side generates the gate driving signal of the array substrate in the display panel. The fan-out structure represents the fan-out area, which is used for the routing connection between the IC (Integrated Circuit, chip) and the data lines in the display area 22. The fan-out area may include various metal traces, such as data leads connected to the IC and data leads connected to the data lines in the display area. Among them, the gate line does not extend out of the fan-out area.

[0054] Among them, the thickness adjustment structure 3 can be a spacer with a thickening effect or a support that can support the gap between the first substrate 1 and the second substrate 2. It can be located in multiple second regions 222 or in the first region 221 and multiple second regions 222.

[0055] Specifically, when the thickness adjustment structure 3 is located in multiple second regions 222, the thickness adjustment structure 3 can be used to increase the thickness of the second substrate 2 in the second region 222, such as a spacer. By setting the spacer on the second substrate 2 in the second region 222, the distance between the first substrate 1 and the second substrate 2 in the second region 2 is shortened, so that it is consistent with the distance between the first substrate 1 and the second substrate 2 in the first region 221. It can be understood that in this case, the thickness of the thickness adjustment structure 3 is the same as the thickness of the fan-out structure 2211. Thus, after the second region 222 is increased with the thickness adjustment structure 3, the distance between the first substrate 1 and the second substrate 2 in the second region 222 is the same as the distance between the first substrate 1 and the second substrate 2 in the first region 221, so as to prevent the problem that the step difference cannot be completely eliminated due to the inconsistent thickness of the two.

[0056] In this embodiment, when the difference between the distance between the first substrate 1 and the second substrate 2 in the first region 221 and the distance between the first substrate 1 and the second substrate 2 in the second region 222 is more than 0.3 μm, it is easy to cause frame-shaped mura around the display area 21. Therefore, when using the thickness adjustment structure 3 to make the distance between the first substrate 1 and the second substrate 2 in the second region 222 the same as the distance in the first region 221, the difference between the two can be made less than 0.3 μm.

[0057] When the thickness adjustment structure 3 is located in the first region 221 and multiple second regions 222, the thickness adjustment structure 3 can be a support located between the first substrate 1 and the second substrate 2. The support is an elastomer, so it can adjust the distance between the first substrate 1 and the second substrate 2 in the second region 222 through elastic deformation to make it the same as the distance between the first substrate 1 and the second substrate 2 in the first region 221. At this time, the thickness adjustment structure 3 can also serve as a support for the gap between the first substrate 1 and the second substrate 2.

[0058] Of course, the thickness adjustment structure 3 may also include spacers located in a plurality of second regions 222 and supports located in the first region 221 and the plurality of second regions 222. At this time, the thickness adjustment structure 3 jointly adjusts the distance between the first substrate 1 and the second substrate 2 in the second region 222 through the spacers and the supports. In this case, the thickness of the spacers used for thickening may be different from the thickness of the fan-out structure 2211 in the first region 221, and the supports are used to compensate for the uncompletely eliminated step difference. First, the spacers roughly adjust the distance between the first substrate 1 and the second substrate 2 in the second region 222, and then the supports precisely adjust the distance between the first substrate 1 and the second substrate 2 in the second region 222, thereby improving the accuracy of thickness adjustment.

[0059] By using the display panel provided by the embodiment of the present disclosure, by adding a thickness adjustment structure 3 between the border regions 22 of the first substrate 1 and the second substrate 2, the distance between the first substrate 1 and the second substrate 2 in the second region 222 is made consistent with the distance between the first substrate 1 and the second substrate 2 in the first region 221, so that there is no step difference around the display region 21, and the frame-type mura defect caused by the peripheral step difference is eliminated.

[0060] Among them, referring to Figure 6 , Figure 6 shows a cross-sectional view of a display panel provided by another embodiment of the present disclosure. As Figure 6 shown, the display panel further includes a packaging adhesive 4 located between the first substrate 1 and the second substrate 2, and the orthographic projection of the packaging adhesive 4 on the second substrate is located in the border region 22;

[0061] Among them, the orthographic projection of the packaging adhesive 4 on the second substrate 2 overlaps with the orthographic projection of the thickness adjustment structure 3 on the second substrate 2.

[0062] In this embodiment, the border region between the first substrate 1 and the second substrate 2 is sealed by the packaging adhesive 4. After the first substrate 1 and the second substrate 2 are packaged with the packaging adhesive 4, the distances between different positions between the first substrate 1 and the second substrate 2 are different. Actually, it is caused by the different distances between the first substrate 1 and the second substrate 2 at the sealing position of the packaging adhesive 4. Then, the thickness adjustment of the second substrate 2 can be realized at the position corresponding to the packaging adhesive 4, so that the distances between the first substrate 1 and the second substrate 2 at the position of the packaging adhesive 4 are the same, thereby eliminating the frame-type mura around the display region.

[0063] Specifically, taking Figure 5For example, the border area 22 generally includes a packaging area and a virtual area. The packaging area is used to fill the encapsulation glue 4 to seal the first substrate 1 and the second substrate 2 into a cell. The virtual area serves as a transition between the packaging area and the display area. It can be understood that the frame-type mura defect is caused by the inconsistent gap between the first substrate 1 and the second substrate 2. When the encapsulation glue 4 encapsulates the gap between the first substrate 1 and the second substrate 2 in the border area 22, the first substrate 1 and the second substrate 2 are deformed, resulting in inconsistent cell thickness after encapsulation. By making the orthographic projection of the thickness adjustment structure 3 on the second substrate 2 overlap with the encapsulation glue 4 on the second substrate 2, the distance between the first substrate 1 and the second substrate 2 in the area where the encapsulation glue 4 is located can be adjusted, so that when the encapsulation glue 4 encapsulates the first substrate 1 and the second substrate 2, the gaps at different positions are all consistent, thereby ensuring that there is no deformation phenomenon in the first substrate 1 and the second substrate 2 after encapsulation, and thus eliminating the frame-type mura defect.

[0064] Of course, it can also be that the orthographic projection of the encapsulation glue 4 on the second substrate 2 coincides with the orthographic projection of the thickness adjustment structure 3 on the second substrate 2. In this case, the thickness adjustment structure 3 can be a support filled in the encapsulation glue 4. By changing the rigid body of the support to an elastic body, the elastic body can undergo elastic deformation to adjust the distance between the first substrate 1 and the second substrate 2 in the second area 222 to be the same as the distance between the first substrate 1 and the second substrate 2 in the first area 221. In this way, while eliminating the frame-type mura around the display area, unnecessary structures can be reduced, and the problem that the encapsulation glue 4 may exceed the packaging area caused by increased space occupation can be avoided.

[0065] In the present disclosure, the thickness adjustment structure 3 can be located in multiple second areas 222, or can be located in the first area 221 and multiple second areas 222. Both of these two methods can achieve the adjustment of the distance between the first substrate 1 and the second substrate 2 in the second area 222.

[0066] In one implementation, the thickness adjustment structure 3 is located in multiple second areas 222. At this time, with continued reference to Figure 7 , the thickness adjustment structure 3 includes spacers 31, and the orthographic projection of the spacers 31 on the second substrate 2 is located in multiple second areas 222;

[0067] Among them, the size of the spacer 31 in the target direction is equal to the size of the fan-out structure 2211 in the target direction, and the target direction is the direction perpendicular to the second substrate 2.

[0068] In this embodiment, the spacer may be a dummy metal block. By disposing the dummy metal block on the surface of the second substrate 2 in the second region 222, the thickness of the second substrate 2 in the second region 222 is increased, so that the distance between the first substrate 1 and the second substrate 2 in the second region 222 is the same as the distance between the first substrate 1 and the second substrate 2 in the first region 221. It can be understood that, in order to make the distance between the first substrate 1 and the second substrate 2 in the second region 222 the same as the distance between the first substrate 1 and the second substrate 2 in the first region 221, the increased thickness of the second substrate 2 needs to be the same as the difference between the two distances. Since this difference is caused by the fan-out structure 2211 in the first region 221 compared to the second region 222, the thickness of the spacer 31 can be determined according to the thickness of the fan-out structure 2211. Among them, taking Figure 5 as an example, the target direction is the direction where the y-axis of the coordinate axis is located.

[0069] It can be understood that the border area 22 includes a packaging area filled with packaging glue 4. When the packaging glue 4 is filled, it is filled in a liquid state. In order to prevent the filled packaging glue 4 from being injected outside the packaging area, the material of the spacer 31 can be the same as the material of the fan-out structure 2211. In this way, when injecting the packaging glue 4, the influence of the spacer 31 on the injection process of the packaging glue 4 can be reduced. For example, if the fan-out structure 2211 is made of copper metal, the spacer can be a copper dummy metal block; if the fan-out structure 2211 is made of silver metal, the spacer can be a silver dummy metal block, etc.

[0070] Among them, the number and arrangement density of the spacers 31 can be determined according to the fan-out structure 2211. Specifically, in the same second region 222, multiple spacers 31 may be included, and the density of the multiple spacers 31 in the second region 222 is the same as the density of the fan-out structure 2211 in the first region 221.

[0071] In this embodiment, when the arrangement density of the spacers 31 is the same as that of the fan-out structure 2211, the consistency of the border area 22 of the second substrate 221 can be improved to completely eliminate the step difference in the border area.

[0072] Among them, the density of multiple spacers 31 in the same second region 222 characterizes the density of the arrangement of the spacers 31 in this region. It can be determined according to the proportion of the area of the orthographic projection of multiple spacers 31 on the surface of the second substrate 2 in the second region 222 in the second region 222. The larger the area proportion, the greater the density of the spacers 31. It can be understood that when the encapsulation glue 4 is in a liquid state when injecting into the border areas of the first substrate 1 and the second substrate 2, if the density of multiple spacers 31 in the second region 222 has a large difference from the density of the fan-out structure 2211 in the first region 221, it is likely to cause a large difference in the encapsulation width of the encapsulation glue 4, thus affecting the subsequent cutting process. Therefore, the density of multiple spacers 31 in the second region 222 is required to be

[0073] less than 1% different from the density of the fan-out structure 2211 in the first region 221.

[0074] The arrangement pattern of the spacers 31 can be the same as or different from the arrangement pattern of the fan-out structure 2211. Among them, when the arrangement pattern of the spacers 31 is the same as that of the fan-out structure 2211, the arrangement mode of multiple spacers 31 can be designed according to the arrangement pattern of the fan-out structure 2211. For example, if the fan-out structure 2211 is composed of two metal patterns of SD and SD pad stacked, dummy metal blocks stacked with SD and SD pad can be set in the second region 222; if the fan-out structure 2211 includes SD and gate2 metal wires, dummy metal blocks with the same patterns of SD and gate2 are also added in the second region 222.

[0075] In the case where the arrangement pattern of the spacers 31 is different from the arrangement pattern of the fan-out structure 2211, in addition to ensuring that the thickness of the spacers 31 is the same as that of the fan-out structure 2211, it is also necessary that the volume proportion of each spacer 31 in the corresponding second region 222 is equal to the volume proportion of the fan-out structure 2211 in the first region 221.

[0076] Among them, the volume proportion of the spacers 31 in the second region 222 characterizes the ratio of the total volume of the spacers 31 to the volume of the gap between the first substrate 1 and the second substrate 2 in the second region 222. Similarly, the volume proportion of the fan-out structure 2211 in the first region 221 characterizes the ratio of the total volume of the fan-out structure 2211 to the volume of the gap between the first substrate 1 and the second substrate 2 in the first region 221.

[0077] It can be understood that the encapsulant 4 is first injected into the border area 22 of the first substrate 1 and the second substrate 2 and then cured to achieve sealing and box formation. If the volume ratio of the spacer 31 in the second area 222 is different from the volume ratio of the fan-out structure 2211 in the first area 221, it is difficult to accurately measure the injection amount of the encapsulant 4, which easily causes the injected encapsulant 4 to exceed the border area, thereby affecting the subsequent cutting process. Therefore, the volume ratio of the spacer 31 in the corresponding second area 222 should not differ much from the volume ratio of the fan-out structure 2211 in the first area 221. Specifically, the difference between the two can be within 3% to prevent the injected encapsulant 4 from exceeding the border area 22.

[0078] In one embodiment, referring to Figure 7 , Figure 7 shows a cross-sectional view of a display panel provided by another embodiment of the present disclosure. As Figure 7 shown, the display panel further includes:

[0079] An encapsulant 4, located between the first substrate 1 and the second substrate 2 and in the border area 22; wherein, all or part of the surface of the spacer 31 close to the encapsulant 4 is in direct contact with the encapsulant 4.

[0080] It can be understood that the support in the encapsulant 4 actually determines the gap between the first substrate 1 and the second substrate 2. By using the spacer 31 to narrow the gap between the first substrate 1 and the second substrate 2 in the second area 222, the size of the support in the encapsulant 4 can be adapted to different peripheral positions, so that the gaps between the first substrate 1 and the second substrate 2 at various positions in the border area 22 are the same. In this case, the spacer 31 can be in direct contact with the encapsulant 4. In this way, when the support filled in the encapsulant 4 supports the gap, it will be based on the distance between the spacer 31 and the first substrate 1, so that the distance between the first substrate 1 and the second substrate 2 in the second area 222 is equal to the distance between the first substrate 1 and the second substrate 2 in the first area 221.

[0081] Among them, the surface of the spacer 31 close to the encapsulant 4 can be in direct contact with the encapsulant 4 entirely, or partially in direct contact with the encapsulant 4. When the surface of the spacer 31 close to the encapsulant 4 is entirely in direct contact with the encapsulant 4, the thickness, material, and arrangement of the spacer 31 are exactly the same as those of the fan-out structure 2211 to reduce the influence of the spacer 31 on the injection of the encapsulant 4. When the surface of the spacer 31 close to the encapsulant 4 is partially in direct contact with the encapsulant 4, the spacer 31 can be partially located in the virtual area between the display area and the border area. This virtual area has no actual function, so the spacer 31 being partially located in the virtual area has less impact on the virtual area, and placing the spacer 31 partially in the virtual area can reduce the influence of the spacer 31 on the injection process of the encapsulant 4.

[0082] In another implementation, the thickness adjustment structure 3 is located in the first region 221 and the multiple second regions 222. At this time, the thickness adjustment structure 3 is an elastomer, and it can adjust the distance between the first substrate 1 and the second substrate 2 in the second region 222 through the elastic deformation of the elastomer, so that the distance between the first substrate 1 and the second substrate 2 in the second region 222 is the same as the distance between the first substrate 1 and the second substrate 2 in the first region 221; the thickness adjustment structure 3 can also include an elastomer and a spacer, and jointly adjust the distance between the first substrate 1 and the second substrate 2 in the second region 222 through elastic deformation and spacer thickening to make it the same as the distance between the first substrate 1 and the second substrate 2 in the first region 221.

[0083] Specifically, when the thickness adjustment structure 3 is an elastomer, continue to refer to Figure 6 , the thickness adjustment structure 3 includes elastic microspheres 32, and the maximum deformation amount of the elastic microspheres 32 is greater than or equal to the difference between the distance between the first substrate 1 and the second substrate 2 in the first region 221 and the distance between them in the second region 222.

[0084] In this embodiment, the maximum deformation amount of the elastic microspheres 32 is greater than or equal to the difference between the first substrate 1 and the second substrate 2 at different positions, so that the elastic microspheres 32 can directly eliminate the step difference at the surrounding positions through elastic deformation, so as to Figure 1For example, the difference between the DP side and the DO side of the second substrate 2 is 0.6 μm, and the difference between the DP side and the GOA side of the second substrate 2 is 0.5 μm. Then, the maximum step difference at the peripheral position is 0.6 μm. Elastic microspheres 32 with a maximum deformation amount greater than or equal to 0.6 μm can be used to adjust the gap size, thereby eliminating the step difference. In this way, not only can the distance between the first substrate 1 and the second substrate 2 in the second region 222 be made consistent with the distance between the first substrate 1 and the second substrate 2 in the first region 221, but also the distance between the first substrate 1 and the second substrate 2 in multiple second regions 222 can be accurately adjusted, so that the step difference between the first substrate 1 and the second substrate 2 in the border region 22 is completely eliminated.

[0085] Among them, the elastic microspheres 32 are filled in the encapsulant 4. In this way, while the elastic microspheres 32 can adjust the gap size between the first substrate 1 and the second substrate 2, the elastic microspheres 32 can support the gap between the first substrate 1 and the second substrate 2. At this time, the diameter of the elastic microspheres 32 can be determined according to the thickness of the liquid crystal cell.

[0086] In this case, the orthographic projection of the elastic microspheres 32 on the second substrate 2 is located in the first region 221 and multiple second regions 222. In this way, it is convenient for the elastic microspheres 32 to be filled in the encapsulant 4, and not only can the gap between the first substrate 1 and the second substrate 2 in the second region 222 be adjusted to be consistent with the gap between the first substrate 1 and the second substrate 2 in the first region 221, but also the gaps between the first substrate 1 and the second substrate 2 in multiple second regions 222 can be made consistent, thereby completely eliminating the step difference in the peripheral region of the display panel.

[0087] Among them, when the thickness adjustment structure 3 includes elastic microspheres 32 and spacers 31, continue to refer to Figure 7 , the sum of the deformation amount of the elastic microspheres 32 and the dimension of the spacer 31 in the target direction is equal to the dimension of the fan-out structure 2211 in the target direction.

[0088] Among them, the elastic microspheres 32 are located in the first region 221 and multiple second regions 222, and the spacers 31 are located in multiple second regions 222. At this time, the gap between the first substrate 1 and the second substrate 2 in the second region 222 can be adjusted jointly by the elastic microspheres 32 and the spacers 31. At this time, the thickness of the spacer 31 and the fan-out structure 2211 can be the same or different.

[0089] Specifically, the difference in the spacing between the first substrate 1 and the second substrate 2 in the first region 221 and the second region 222 can be reduced by the spacer 31, and the spacing between the first substrate 1 and the second substrate 2 in the second region 222 can be precisely adjusted by the elastic microspheres 32 to be the same as the spacing between the first substrate 1 and the second substrate 2 in the first region 221. In this way, the complexity of wiring in the border area 22 and the fluctuation factors caused by the process can be avoided, and the problem that the step difference around the display panel is difficult to completely eliminate can be solved. Moreover, since the elastic microspheres 32 can undergo elastic deformation, the thickness adjustment structure 3 can more flexibly cope with design changes and process fluctuations.

[0090] Among them, the elastic microspheres 32 can be polymer microspheres. In this embodiment, the specific material of the elastic microspheres 32 is not limited, as long as the maximum deformation amount is greater than the difference between the spacing between the first substrate 1 and the second substrate 2 in the first region 221 and the spacing between the first substrate 1 and the second substrate 2 in the second region 222.

[0091] By using the display panel provided by the embodiment of the present disclosure, spacers 31 are added at the positions of the second substrate 2 in multiple second regions 222, and elastic microspheres 32 are filled in the first region 221 and the multiple second regions 222. The spacers 31 and the elastic microspheres 32 are used together to adjust the spacing between the first substrate 1 and the second substrate 2 in the second region 222 to be the same as the spacing between the first substrate 1 and the second substrate 2 in the first region 221. At this time, the sealed first substrate 1 and second substrate 2 will not deform, thereby avoiding the situation where the thicknesses at different positions are different after the liquid crystal is sealed. Thus, the frame-type mura defect around the display panel is eliminated.

[0092] The following introduces the display panel provided by the present disclosure with a specific example:

[0093] Example 1: Refer to Figure 5 , the display panel includes a first substrate 1 and a second substrate 2. The second substrate 2 includes a display area 21 and a border area 22 surrounding the display area 21. The border area 22 includes a first region 221 and multiple second regions 222. Among them, the first region 221 is the area where the data pads of the second substrate 2 are located, and the multiple second regions 222 include the areas where the gate driving circuits are located and the areas where the data output lines are located. Among them, the first region 221 includes a fan-out structure 2211, and the fan-out structure 2211 includes SD and SD PAD patterns.

[0094] A thickness adjustment structure 3 is provided in a plurality of second regions 222. The thickness adjustment structure is a dummy metal block, whose material and thickness are the same as those of the fan-out structure 2211 in the first region 221, and the arrangement pattern of the dummy metal blocks is the same as that of the fan-out structure 2211, which is also the SD and SD PAD patterns. Exemplarily, referring to Figure 8 and Figure 9 , Figure 8 shows a schematic diagram of the patterns of SD and SD PAD on different sides of the second substrate 2, Figure 9 shows a schematic diagram of the stacking of SD patterns and SD PAD patterns on the DP side and the GOA side (or DO side), as Figure 8 and Figure 9 shown. The left figure is the stacking method of SD and SD PAD patterns on the GOA side or DO side, and the right figure is the stacking method of the SD and SD PAD patterns including stacking on the DP side. The two are exactly the same.

[0095] Similarly, when the fan-out structure includes the patterns of SD and GATE2, as Figure 10 shown, Figure 10 shows a schematic diagram of the patterns of SD and SD PAD on different sides of the second substrate 2. The arrangement of the dummy metal blocks is also the patterns of SD and GATE2.

[0096] Comparing Figure 1 , Figure 2 and Figure 5 , when the thickness adjustment structure 3 is not added, the distance between the first substrate 1 and the second substrate 2 in the second region 222 is different from the distance between the first substrate 1 and the second substrate 2 in the first region 221, which causes the cell thickness at different positions of the liquid crystal cell to be different, resulting in frame-shaped mura around the display area 22 of the display panel.

[0097] In the display panel with the thickness adjustment structure 3 added, the thickness adjustment structure 3 makes the distance between the first substrate 1 and the second substrate 2 in the second region 222 the same, and then the cell thickness at each position of the liquid crystal cell is uniform, eliminating the mura defect around the display area 22 of the display panel.

[0098] Example 2: Continuing to refer to Figure 6 , the display panel includes a first substrate 1 and a second substrate 2. The second substrate 2 includes a display area 21 and a border area 22. The first region 221 and a plurality of second regions 222 of the border area 22. The first region 221 includes a fan-out structure 2211. The second region 222 includes a thickness adjustment structure 3. The thickness adjustment structure 3 is an elastic microsphere 32. The elastic microspheres 32 are filled in the encapsulation adhesive 4. By the elastic deformation of the elastic microspheres 32, the distance between the first substrate 1 and the second substrate 2 in the second region 222 is made the same as the distance between the first substrate 1 and the second substrate 2 in the first region 221.

[0099] Compare Figure 1 、 Figure 2 and Figure 6 , Figure 1 and Figure 2 Among Figure 1 and Figure 2 , the distance between the first substrate 1 and the second substrate 2 in the second region 222 is different from the distance between the first substrate 1 and the second substrate 2 in the first region 221, which results in different cell thicknesses at different positions of the liquid crystal cell, and thus frame-shaped mura exists around the display area 22 of the display panel.

[0100] When the silicon balls filled in the encapsulation glue 4 are replaced with elastic microspheres 32, the distance between the first substrate 1 and the second substrate 2 in the second region 222 is the same, and thus the cell thickness at each position of the liquid crystal cell is uniform, eliminating the mura defect around the display area 22 of the display panel.

[0101] Example 3: Continuing to refer to Figure 7 , the display panel includes a first substrate 1 and a second substrate 2. The second substrate 2 includes a display area 21 and a border area 22. The first region 221 and a plurality of second regions 222 of the border area 22. The first region 221 includes a fan-out structure 2211. The second region 222 includes a thickness adjustment structure 3, and the thickness adjustment structure 3 is a spacer 31. The dimension of the spacer 31 in the direction perpendicular to the second substrate 2 is the same as the dimension of the fan-out structure 2211 in the direction perpendicular to the second substrate 2, and the arrangement pattern of the spacers 31 is the same as the arrangement pattern of the fan-out structure 2211. At the same time, elastic microspheres 32 are filled in the encapsulation glue 4.

[0102] Compare Figure 1 、 Figure 2 and Figure 7 , Figure 1 and Figure 2 Among Figure 1 and Figure 2 , the distance between the first substrate 1 and the second substrate 2 in the second region 222 is different from the distance between the first substrate 1 and the second substrate 2 in the first region 221, which results in different cell thicknesses at different positions of the liquid crystal cell, and thus frame-shaped mura exists around the display area 22 of the display panel.

[0103] When a dummy metal block is added and the silicon balls filled in the encapsulation glue 4 are replaced with elastic microspheres 32, the distance between the first substrate 1 and the second substrate 2 in the second region 222 is the same, and thus the cell thickness at each position of the liquid crystal cell is uniform, eliminating the mura defect around the display area 22 of the display panel.

[0104] Based on the same inventive concept, the embodiments of the present disclosure further provide a display device including the display panel described in any of the above embodiments.

[0105] Each embodiment in this specification is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.

[0106] Finally, it should also be noted that in this text, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, commodity or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, commodity or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, commodity or device comprising the said element.

[0107] The above has introduced in detail a display panel and a display device provided by the present disclosure. Specific examples are used herein to elaborate on the principles and implementation manners of the present disclosure. The description of the above embodiments is only for helping to understand the method and its core idea of the present disclosure; at the same time, for those of ordinary skill in the art, according to the idea of the present disclosure, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present disclosure.

[0108] Those skilled in the art will readily think of other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common general knowledge or conventional technical means in the technical field not disclosed by the present disclosure. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0109] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

[0110] As used herein, the terms "an embodiment", "embodiment" or "one or more embodiments" mean that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. In addition, please note that the examples of the phrase "in one embodiment" herein do not necessarily all refer to the same embodiment.

[0111] In the description provided herein, numerous specific details are set forth. However, it can be understood that embodiments of the present disclosure may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this description.

[0112] In a claim, any reference sign between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present disclosure may be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In a unit claim enumerating several devices, several of these devices may be embodied by the same item of hardware. The use of the words first, second, and third, etc. does not denote any order. These words may be interpreted as names.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A display panel, characterized in that: include: a first substrate; a second substrate disposed opposite to the first substrate, the second substrate comprising a display area and a frame area surrounding the display area, the frame area comprising a first area and a plurality of second areas other than the first area; wherein in the first area, a side of the second substrate close to the first substrate comprises a fan-out structure; and, a thickness adjustment structure, located in the border area and between the first substrate and the second substrate; The thickness adjustment structure makes the distance between the first substrate and the second substrate in the second region consistent with the distance between the first substrate and the second substrate in the first region.

2. The display panel according to claim 1, characterized in that: Also includes: A packaging glue is located between the first substrate and the second substrate, and the orthographic projection of the packaging glue on the second substrate is located in the frame area; The orthographic projection of the packaging glue on the second substrate overlaps with the orthographic projection of the thickness adjustment structure on the second substrate.

3. The display panel according to claim 1, characterized in that: The thickness adjustment structure includes a spacer, and the orthographic projection of the spacer on the second substrate is located in the plurality of second regions; The size of the spacer in a target direction is equal to the size of the fan-out structure in the target direction, and the target direction is a direction perpendicular to the second substrate.

4. The display panel according to claim 3, characterized in that: The material of the spacer is the same as that of the fan-out structure.

5. The display panel according to claim 3, characterized in that: A plurality of the spacers are included in the same second region, and a density of the plurality of the spacers in the second region is the same as a density of the fan-out structure in the first region.

6. The display panel according to claim 3, characterized in that: The volume proportion of each of the spacers in the corresponding second region is equal to the volume proportion of the fan-out structure in the first region.

7. The display panel according to claim 3, characterized in that: Also includes: Packaging glue, located between the first substrate and the second substrate and located in the frame area; Wherein, all or part of a surface of one side of the spacer close to the packaging adhesive is in direct contact with the packaging adhesive.

8. The display panel according to any one of claims 1 to 3, characterized in that: The thickness adjustment structure includes elastic microspheres, and the maximum deformation amount of the elastic microspheres is greater than or equal to the difference between the spacing between the first substrate and the second substrate in the first region and the spacing between the first substrate and the second substrate in the second region.

9. The display panel according to claim 8, characterized in that: The display panel includes packaging glue, and the elastic microspheres are filled in the packaging glue.

10. The display panel according to claim 8, characterized in that: The orthographic projection of the elastic microsphere on the second substrate is located in the first region and a plurality of the second regions.

11. The display panel according to claim 8, characterized in that: When the thickness adjustment structure includes a spacer, the sum of the deformation amount of the elastic microsphere and the size of the spacer in a target direction is equal to the size of the fan-out structure in the target direction, and the target direction is a direction perpendicular to the second substrate.

12. The display panel according to claim 8, characterized in that: The elastic microspheres are high molecular polymer microspheres.

13. A display device, characterized in that: Comprising a display panel as described in any one of claims 1-12.

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