Display panel and display device

Abstract

The embodiment of the invention provides a display panel and a display device. The display panel comprises a display area and a non-display area. The display panel further comprises a first substrate, reflective metal, glass cement and a second substrate. The reflective metal is located on one side of the first substrate and located in the non-display area. The reflective metal comprises a hollow part and an entity part. The glass cement is located on the side, away from the first substrate, of the reflection metal layer and surrounds the display area. The second substrate is located on the side, away from the first substrate, of the glass cement. Wherein the non-display area comprises a first area, the first area comprises a first path, the first path is a laser spot center moving path in the packaging technology, and the area of the hollow part located in the first area is larger than or equal to the area of the entity part located in the first area. The display panel is used for improving the anti-falling and anti-bumping capability of the display panel.

Description

TECHNICAL FIELD

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

[0002] With the development of science and technology and the popularity of electronic devices, display panels are increasingly used in people's lives. As the use of electronic devices in people's lives increases, the risk of bumps or drops faced by the display panels of electronic devices also gradually increases. The existing display panels have insufficient anti-bump or anti-drop capabilities, which leads to the need to replace the entire display panel for maintenance when the display panel of an electronic device is damaged due to bumps or drops, and the cost of replacing the display panel is high. SUMMARY

[0003] Therefore, the embodiments of the present application provide a display panel and a display device to improve the anti-drop and anti-bump capabilities of the display panel.

[0004] In a first aspect, the embodiments of the present application provide a display panel, comprising a display area and a non-display area. The display panel further comprises a first substrate, a reflective metal, a glass glue, and a second substrate. The reflective metal is located on one side of the first substrate and in the non-display area, and the reflective metal comprises hollow parts and solid parts. The glass glue is located on the side of the reflective metal layer away from the first substrate, and the glass glue surrounds the display area. The second substrate is located on the side of the glass glue away from the first substrate. The non-display area comprises a first region, and the first region comprises a first path, which is a center moving path of a laser spot in a packaging process. The area of the hollow part located in the first region is greater than or equal to the area of the solid part located in the first region.

[0005] In a possible implementation manner of the first aspect, in the non-display area, the area of the hollow part is greater than or equal to the area of the solid part.

[0006] In a possible implementation manner of the first aspect, the hollow parts are uniformly distributed in the reflective metal.

[0007] In a possible implementation manner of the first aspect, the hollow part comprises a plurality of sub-hollow parts, and the projection shape of the sub-hollow part along the direction perpendicular to the plane of the display panel is a circle or a polygon.

[0008] In a possible implementation manner of the first aspect, the non-display area further comprises a second region, the second region is adjacent to the first region, and the first path is located outside the second region. The ratio of the area of the hollow part located in the first region to the area of the first region is a first ratio, the ratio of the area of the hollow part located in the second region to the area of the second region is a second ratio, and the first ratio is greater than the second ratio.

[0009] In one possible implementation of the first aspect, the boundary line of the second region coincides with at least a portion of the boundary line of the reflective metal.

[0010] In one possible implementation of the first aspect, the second region includes a first sub-region and a second sub-region. The first sub-region is located on the side closer to the display area, the first region is located on the side of the first sub-region farther from the display area, and the second sub-region is located on the side of the first region farther from the display area. The ratio of the area of ​​the hollow portion in the first sub-region to the area of ​​the first sub-region is a first sub-ratio, and the ratio of the area of ​​the hollow portion in the second sub-region to the area of ​​the second sub-region is a second sub-ratio. The first ratio is greater than the first sub-ratio and greater than the second sub-ratio.

[0011] In one possible implementation of the first aspect, the extension direction of the hollow portion located in the first region intersects the first path and the intersection angle is not equal to ninety degrees.

[0012] In one possible implementation of the first aspect, the first sub-ratio is not equal to the second sub-ratio.

[0013] In one possible implementation of the first aspect, the extension direction of the hollow portion located in the first region is a curved direction.

[0014] In one possible implementation of the first aspect, the cutout portion located in the first region includes a plurality of first sub-cutout portions, the first sub-cutout portions having an S-shaped projection shape along the direction perpendicular to the plane where the display panel is located, and the S-shape being inclined relative to the first path.

[0015] In one possible implementation of the first aspect, the cutout portion located in the second sub-region includes a plurality of second sub-cutout portions, the projection shape of the second sub-cutout portions along the direction perpendicular to the plane where the display panel is located being circular or polygonal.

[0016] Secondly, embodiments of this application also provide a display device, including the display panel of any one of claims 1-12.

[0017] The display panel provided in this application embodiment includes a first region comprising a laser spot center movement path. Since the energy distribution of the laser spot conforms to a Gaussian distribution, meaning the laser energy is concentrated in the central region, the energy density is higher in the central region and lower at the edges. Therefore, by setting the area of ​​the hollow portion within the first region to be greater than or equal to the area of ​​the solid portion, the aperture ratio within the first region can reach 50% or more, and the area ratio of the solid portion within the first region can be less than or equal to 50%. This effectively reduces the laser reflectivity within the first region, thereby reducing the difference in energy density between the central and edge regions of the laser spot, ultimately reducing the temperature gradient during the melting of the glass adhesive, and ultimately improving the drop resistance of the display panel. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a display panel provided in an embodiment of this application; Figure 2 An embodiment provided in this application Figure 1 Enlarged schematic diagram of region A; Figure 3 An embodiment provided in this application Figure 1 AA cross-section view; Figure 4a This is a schematic diagram of the energy distribution of a laser. Figure 4b This is a schematic diagram of the energy distribution of a laser. Figure 5 This is a schematic diagram of the energy distribution of a laser beam; Figure 6a A temperature diagram illustrating the heat absorption phase of silicone sealant in an experimental control group, provided as an embodiment of this application. Figure 6b A temperature diagram illustrating the heat absorption and reflection phases of an experimental control group provided in this application embodiment; Figure 7a A temperature diagram of the endothermic phase of experimental group 1 provided in this application embodiment; Figure 7b A temperature diagram illustrating the heat absorption and reflection stages of experimental group 1 provided in this application embodiment; Figure 8aA temperature diagram illustrating the endothermic phase of experimental group 2 provided in this application embodiment; Figure 8b A temperature diagram illustrating the heat absorption and reflection stages of experimental group 2 provided in this application embodiment; Figure 9 A schematic diagram of a display panel provided in an embodiment of this application; Figure 10 An embodiment provided in this application Figure 9 Enlarged view of region B in the middle; Figure 11 This is a schematic diagram of a display device provided in an embodiment of this application.

[0020] Label Explanation 100, Display panel; 101, First substrate; 110, Reflective metal; 111, Cutout portion; 1111, Sub-cutout portion; 1112, First sub-cutout portion; 1113, Second sub-cutout portion; 112, Solid portion; 102, Glass glue; 103, Second substrate. Detailed Implementation

[0021] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0022] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0023] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0024] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0025] The inventors discovered that the drop and impact resistance of a display panel is closely related to the permanent internal stress generated by the silicone sealant during the panel encapsulation process. Specifically, the encapsulation process involves applying silicone sealant to the non-display areas of the panel and curing it using a laser. The cured sealant generates permanent internal stress, thus achieving encapsulation. Research shows that the greater the permanent internal stress generated after the silicone sealant cures, the worse the drop and impact resistance of the display panel. Furthermore, the permanent internal stress generated after the silicone sealant cures is positively correlated with the temperature gradient during the curing process; that is, the greater the temperature gradient during the curing process, the greater the permanent internal stress generated after curing.

[0026] like Figures 1 to 3 As shown, this application embodiment provides a display panel 100, including: a display area AA and a non-display area NA. The display panel 100 includes: a first substrate 101, a reflective metal 110, a glass adhesive 102, and a second substrate 103.

[0027] like Figure 3 As shown, the first substrate 101 serves to support or integrate display-related circuits (such as control circuits and pixel circuits). In one possible implementation, the first substrate 101 is a substrate or an array substrate.

[0028] Combination Figure 1 and Figure 3 The reflective metal 110 is located on one side of the first substrate 101 and in the non-display area NA. The reflective metal 110 includes a cutout portion 111 and a solid portion 112. The reflective metal 110 is used to reflect laser light, so that the laser heat source can propagate from the reflective metal 110 to the glass adhesive 102 to melt the glass adhesive 102. The reflective metal 110 includes a cutout portion 111 and a solid portion 112, meaning that the reflective metal 110 is not a solid surface structure but a patterned structure. The cutout portion 111 can reduce the overall reflective effect of the reflective metal 110, thereby helping to reduce the temperature gradient of the glass adhesive 102 during the melting process when the laser enters the glass adhesive 102. Reducing the temperature gradient of the glass adhesive 102 can improve the drop resistance of the display panel 100.

[0029] The glass adhesive 102 is located on the side of the reflective metal 110 layer facing away from the first substrate 101, and surrounds the display area AA. During the encapsulation process, the glass adhesive 102 melts upon heating to achieve encapsulation. The glass adhesive 102 surrounding the display area AA forms an encapsulation region, thus encapsulating the display area AA within the encapsulation region.

[0030] The second substrate 103 is located on the side of the glass adhesive 102 opposite to the first substrate 101. The second substrate 103 is used to protect the display area AA or to implement other functions (such as touch function). In one possible implementation, the second substrate 103 is a cover plate or a touch panel.

[0031] The non-display area NA includes a first region NA1, which includes a first path L1. The first path L1 is the movement path of the laser spot center during the packaging process. The area of ​​the cutout portion 111 within the first region NA1 is greater than or equal to the area of ​​the solid portion 112 within the first region NA1. The reflective metal 110 is partially located within and partially located outside the first region NA1, and the reflective metal 110 is distributed throughout the first region NA1. The inclusion of the first path L1 in the first region NA1 means that the first region NA1 includes the laser spot center movement path. The laser spot center is the geometric center of the laser spot shape, for example... Figure 4a As shown, if the laser spot is circular, then the center of the laser spot is the center of the circle. Within the laser spot, the energy distribution is not uniform; that is, the energy in each region or part of the laser spot is not exactly equal, but rather follows a Gaussian distribution. For example... Figure 4b As shown, the laser energy is concentrated in the central region of the laser spot (for example, a circular region with the center of the spot, where the diameter D of the laser spot can be 800um-1100um, and the diameter d of the central region is 180um-220um). Figure 5 The laser spot shown has a diameter D of 1000 μm and a diameter d of 200 μm. Figure 4a The curve in the figure represents the energy distribution. Figure 4a It can be seen from this that the energy distribution of the laser spot is Gaussian. Figure 4b The solid line in the graph represents the Gaussian distribution, and the dashed line represents the actual measured energy distribution. Figure 5 C1 in the text represents the central region. Figure 5 In this context, C2 represents the central region, which has a lower energy density than the central region but a higher energy density than the edge region C3. Figure 4a and Figure 4b This indicates that the laser energy density distribution follows a Gaussian distribution. Therefore, the energy density is higher in the central region of the laser spot and lower in the peripheral region.

[0032] like Figure 3 As shown, taking a single laser spot as an example, the energy generated by the single laser spot can be obtained using a LaserBeam profile to obtain an energy spectrum. Substituting this with the actual dimensions of the glass adhesive 102, the laser energy in different regions of the glass adhesive 102 can be obtained (the energy distribution area is represented by area, such as...). Figure 3Then, multiply the energy index of the region (i.e., the product of the initial laser energy and the Gaussian distribution area corresponding to the partition) by the heat absorption coefficient of the glass glue 102 to obtain the laser energy value absorbed by the glass glue 102 in the region (①). Then, multiply ① by the area ratio of the solid part 112 of the reflective metal 110 of the partitioned glass glue 102 (i.e., 1 - aperture ratio, the aperture ratio is the area ratio of the hollow part 111) to obtain ③ (laser reflection energy). Then, multiply ③ by the heat absorption coefficient of the glass glue 102 in the region to obtain the laser energy ⑤ after laser reflection in the region, as shown in Figure (b). In the figure, ② is the energy obtained by the glass glue 102 in the region based on the thermal conductivity, and ④ is the laser energy obtained by the glass glue 102 in the region based on the thermal conductivity of the reflective metal 110 and the thermal conductivity of the glass glue 102. After subtracting the energy indices of the central region and the non-central region of the glass glue 102 obtained in the above way, the energy difference index is obtained. Specifically, it can be expressed by the following formula: Central energy index = (initial laser energy) Central Gaussian distribution area (Heat absorption coefficient of silicone sealant 102) (1 + area ratio of the solid portion 112 in the central region where the silicone sealant 102 is located); where the area ratio of the solid portion 112 in the central region where the silicone sealant 102 is located is the ratio of the area of ​​the solid portion in the central region to the area of ​​the central region.

[0033] Non-central energy index = (initial laser energy) Non-central Gaussian distribution area (Heat absorption coefficient of silicone sealant 102) (1 + area ratio of the solid portion 112 in the non-central region where the silicone sealant 102 is located); where the area ratio of the solid portion 112 in the non-central region where the silicone sealant 102 is located is the ratio of the area of ​​the solid portion in the non-central region to the area of ​​the non-central region.

[0034] Energy difference index = Central energy index - Non-central energy index Therefore, the area of ​​the cutout portion 111 in the first region NA1 is greater than or equal to the area of ​​the solid portion 112, which means that the opening ratio in the first region NA1 is as high as 50% (including 50%) or more, and also means that the area ratio of the solid portion 112 in the first region NA1 is less than or equal to 50%. This can effectively reduce the reflectivity of the laser in the first region NA1, thereby reducing the difference in energy density between the center region and the edge region of the laser spot, and ultimately reducing the temperature gradient during the melting of the glass adhesive 102. The reduction of the temperature gradient during the melting of the glass adhesive 102 will improve the drop resistance of the display panel 100.

[0035] Table 1 shows the comparison results between the display panel 100 provided in the embodiments of this application and the experimental control group.

[0036]

[0037] Table 1 In Table 1, Experimental Group 1 and Experimental Group 2 correspond to the embodiments provided in the embodiments of this application.

[0038] As can be clearly seen from Table 1, the display panel 100 provided in this application embodiment (i.e., experimental group 1 and experimental group 2) has a significantly increased average number of drops. To better understand the temperature gradient changes during the melting process of the silicone sealant, as follows... Figure 6a , Figure 6b , Figure 7a , Figure 7b , Figure 8a ,as well as Figure 8b As shown, where, Figure 6a This is a temperature diagram of the endothermic phase in the experimental control group. Figure 6b This is a temperature diagram illustrating the endothermic and reflective phases of the experimental control group. Figure 7a This is a temperature diagram of the endothermic phase in experimental group 1; Figure 7b This is a temperature diagram illustrating the heat absorption and reflection phases of experimental group 1. Figure 8a This is a temperature diagram of the endothermic phase in experimental group 2; Figure 8b This is a temperature diagram illustrating the heat absorption and reflection stages of experimental group 2. The reflection structure of the control group can be referenced from relevant technologies, with its openwork area accounting for at least 70%; the corresponding reflective metal structure of experimental group 1 can be referenced from... Figure 9 The reflective metal structure corresponding to experimental group 2 can be referenced. Figure 1 .

[0039] Figure 6a It can be seen that the laser energy diffuses outward from the central region (i.e., the bright red area) (such as the dark red area near the center). After being reflected by the reflective metal 110, the temperature diagram of the glass glue 102 is shown below. Figure 6b As shown, the solid portion 112 of the reflective metal 110 reflects the laser light into the silicone sealant 102, causing the temperature of the silicone sealant 102 to rise from the bottom and gradually diffuse towards the top (near the dark red area of ​​the first substrate). Figure 6b It can be seen that the area difference between the bright red region and the dark red region near the first substrate 101 is large, which results in a large difference in the overall temperature gradient.

[0040] Figure 7a It can be seen that the laser energy diffuses outward from the central region (i.e., the bright red area) (such as the dark red area near the center). After being reflected by the reflective metal 110, the temperature diagram of the glass glue 102 is shown below. Figure 7bAs shown, the solid portion 112 of the reflective metal 110 reflects the laser light into the silicone sealant 102, causing the temperature of the silicone sealant 102 to rise from the bottom and gradually diffuse towards the top (near the dark red area of ​​the first substrate). Figure 7b It can be seen that the area difference between the bright red region and the dark red region near the first substrate 101 is smaller than the area difference of the experimental control group, thus effectively reducing the overall temperature gradient difference.

[0041] Figure 8a It can be seen that the laser energy diffuses outward from the central region (i.e., the bright red area) (such as the dark red area near the center). After being reflected by the reflective metal 110, the temperature diagram of the glass glue 102 is shown below. Figure 8b As shown, the solid portion 112 of the reflective metal 110 reflects the laser light into the silicone sealant 102, causing the temperature of the silicone sealant 102 to rise from the bottom and gradually diffuse towards the top (near the dark red area of ​​the first substrate). Figure 8b It can be seen that the area difference between the bright red area and the dark red area near the first substrate 101 is smaller than that of the experimental control group but larger than that of experimental group 1. Therefore, the overall temperature gradient difference is smaller than that of the experimental control group but smaller than that of experimental group 1. Thus, the drop resistance of experimental group 1 and experimental group 2 is higher than that of the experimental control group, and the drop resistance of experimental group 1 is slightly better than that of experimental group 2.

[0042] like Figure 1 and Figure 2 As shown, in one embodiment of this application, in the non-display area NA, the area of ​​the cutout portion 111 is greater than or equal to the area of ​​the solid portion 112.

[0043] In this embodiment, within the entire non-display area NA, the area of ​​the cutout portion 111 is greater than or equal to the area of ​​the solid portion 112. This means that the solid portion 112 accounts for less than or equal to 50% of the area of ​​the reflective metal 110. The fact that the solid portion 112 accounts for less than or equal to 50% of the area of ​​the reflective metal 110 can effectively reduce the difference in energy density between the central region of the laser spot and the non-central region (including the edge region) of the laser spot. The reduction in energy density difference means a reduction in the energy density of the heat source of the glass adhesive 102. Since the thermal conductivity of the glass adhesive 102 is fixed, the reduction in the energy density of the heat source of the glass adhesive 102 can effectively reduce the temperature gradient of the glass adhesive 102 during the melting process, thereby improving the drop resistance of the display panel 100.

[0044] like Figure 1 As shown, in one embodiment of this application, the hollowed-out portion 111 is uniformly distributed on the reflective metal 110.

[0045] In this embodiment, the cutouts 111 are uniformly distributed across the reflective metal 110, meaning that the area ratio of the solid portions 112 in each region of the reflective metal 110 is substantially consistent. It should be noted that "substantially consistent" here includes inconsistencies caused by process errors. Each region includes a portion of the solid portion 112 and a portion of the solid portion 112, and the area of ​​the solid portion 112 in each region is consistent with the area ratio of the solid portion 112. For example, the reflective metal 110 includes a left region, a middle region, and a right region. These three regions have equal lengths, and their widths may be equal or unequal. For example, the width of the middle region may be greater than the widths of the other two regions, and the widths of the other two regions may be equal. Therefore, the area ratios of the solid portions 112 in the left region, the center region, and the right region are all equal.

[0046] like Figure 1 As shown, in one possible implementation, the cutout portion 111 includes a plurality of sub-cutout portions 1111, and each sub-cutout portion 1111 has the same projection shape and equal area along the direction perpendicular to the plane where the display panel 100 is located.

[0047] In this implementation, the projection shapes of each sub-cutout portion 1111 along the direction perpendicular to the plane where the display panel 100 is located are the same and the area is equal, which is conducive to achieving a uniform distribution of the cutout portions 111, thereby facilitating the uniform distribution of the cutout portions 111.

[0048] It should be noted that this embodiment is merely an exemplary description of a preferred option and is not intended to be limiting. For example, in another embodiment, the cutout portion 111 includes multiple sub-cutout portions 1111, each sub-cutout portion 1111 having a different projection shape and / or equal area along a direction perpendicular to the plane of the display panel 100. Therefore, the area ratio of the cutout portion 111 / solid portion 112 on the reflective metal 110 may differ in local areas, while maintaining a consistent area ratio over a larger area.

[0049] In one embodiment of this application, the cutout portion 111 includes a plurality of sub-cutout portions 1111, and the projection shape of the sub-cutout portions 1111 along the direction perpendicular to the plane where the display panel 100 is located is circular, elliptical, or polygonal. Among them, the polygon can be a triangle, quadrilateral, pentagon, hexagon, etc.

[0050] In this embodiment, the projection shape of the sub-cutout portion 1111 along the direction perpendicular to the plane where the display panel 100 is located is circular or polygonal, which is beneficial for achieving low process difficulty and cost reduction.

[0051] like Figure 9As shown, in one embodiment of this application, the non-display area NA further includes a second area NA2, which is adjacent to the first area NA1, and the first path L1 is located outside the second area NA2. The ratio of the area of ​​the cutout portion 111 located in the first area NA1 to the area of ​​the first area NA1 is a first ratio, and the ratio of the area of ​​the cutout portion 111 located in the second area NA2 to the area of ​​the second area NA2 is a second ratio. The first ratio is greater than the second ratio.

[0052] In this embodiment, the first ratio is greater than the second ratio, meaning that the metallic reflectivity of the first region NA1 is less than the reflectivity of the reflective metal 110 in the second region NA2. This also means that the reflectivity of the laser located in the first region NA1 is less than the reflectivity of the laser located in the second region NA2, thereby making the difference between the laser energy density in the first region NA1 and the laser energy density in the second region NA2 smaller. Consequently, the glass adhesive 102 has a smaller temperature gradient during the melting process, and ultimately, the display panel 100 has good drop resistance.

[0053] In one possible implementation, the boundary line of the second region NA2 coincides with at least a portion of the boundary line of the reflective metal 110. For example, in one possible implementation, the boundary line of the second region NA2 coincides with a portion of the boundary line of the reflective metal 110, and another portion of the boundary line of the reflective metal 110 coincides with a portion of the boundary line of the first region NA1. Therefore, the first region NA1 is the region including the path of the laser spot center, and the boundary line of the first region NA1 coincides with a portion of the boundary line of the reflective metal 110, while the second region NA2 can be the region where the portion of the reflective metal 110 located outside the first region NA1 is located. For example, the first region NA1 is a central region and includes a portion of the boundary of the reflective metal 110. In another possible implementation, the outer boundary line of the second region NA2 coincides with the boundary line of the reflective metal 110. For example, the first region NA1 is a central region and does not include the boundary of the reflective metal 110, while the second region NA2 is the region occupied by the portion of the reflective metal 110 excluding the portion located within the first region NA1.

[0054] Combination Figure 9 and Figure 10In one possible implementation, the second region NA2 includes a first sub-region NA21 and a second sub-region NA22. The first sub-region NA21 is located on the side closer to the display area AA. The first region NA1 is located on the side of the first sub-region NA21 away from the display area AA. The second sub-region NA22 is located on the side of the first region NA1 away from the display area AA. The ratio of the area of ​​the cutout portion 111 in the first sub-region NA21 to the area of ​​the first sub-region NA21 is a first sub-ratio. The ratio of the area of ​​the cutout portion 111 in the second sub-region NA22 to the area of ​​the second sub-region NA22 is a second sub-ratio. The first ratio is greater than the first sub-ratio and greater than the second sub-ratio.

[0055] In this implementation, the second ratio includes a first sub-ratio and a second sub-ratio. The first region NA1 is the central region, the first sub-region NA21 is the inner region, and the second sub-region NA22 is the outer region. The movement trajectory of the laser spot center is located in the central region. The area ratio of the hollow portion 111 in the first region NA1 is greater than that of the hollow portions 111 in the left and right side regions, so as to reduce the reflectivity of the laser spot central region, thereby reducing the difference in energy density between the heat source of the glass adhesive 102 in the central region and the energy density in the side regions, and ultimately reducing the temperature gradient of the glass adhesive 102 during the melting process, so as to improve the drop resistance of the display panel 100.

[0056] In this embodiment, the first sub-ratio and the second sub-ratio can be equal or unequal. Equal first and second sub-ratios mean that the area ratio of the hollow portion 111 in the first sub-region NA21 is the same as that in the second sub-region NA22, which helps reduce design complexity and maintains the same heat source reflectivity on both sides of the first region NA1, thus reducing the temperature gradient of the glass adhesive 102 during the melting process. Unequal first and second sub-ratios mean that the area ratio of the hollow portion 111 in the first sub-region NA21 is different from that in the second sub-region NA22, which facilitates differentiated design and allows for more precise control of the temperature gradient of the glass adhesive 102 during the melting process.

[0057] In one possible implementation, the extension direction of the cutout portion 111 located in the first region NA1 intersects the first path L1 and the intersection angle is not equal to ninety degrees.

[0058] In this implementation, the extension direction of the hollow part 111 located in the first region NA1 intersects the first path L1 and the intersection angle is not equal to 90 degrees. This is beneficial to balance the temperature gradient difference caused by the relative change in the position of the low reflectivity required region (i.e., the region that needs to reduce reflectivity in order to reduce temperature difference) during the laser melting of glass glue 102 due to the path movement (for example, a certain region needs to have low reflectivity during time period T1, while the region needs to have high reflectivity during time period T2).

[0059] In one embodiment of this application, the extension direction of the hollow portion 111 located in the first region NA1 is a curved direction. The angle between the curved direction and the first path L1 is not fixed; the angle between the curved direction and the first path L1 is different at different positions, which helps to balance the temperature gradient differences caused by the relative changes in the position of the low reflectivity required area due to path movement during the laser melting of the glass adhesive 102.

[0060] like Figure 9 or Figure 10 As shown in one embodiment of this application, the cutout portion 111 located in the first region NA1 includes a plurality of first sub-cutout portions 1112. The projection shape of the first sub-cutout portions 1112 along the direction perpendicular to the plane where the display panel 100 is located is S-shaped, and the S-shape is inclined relative to the first path L1. Because of the S-shaped curve and its inclination relative to the first path L1, the first sub-cutout portions 1112 can form an asymmetrical structure about the center line of the overlapping area of ​​two adjacent laser spots. Here, an asymmetrical structure means that the area on both sides of the center line is equal. Therefore, the S-shape, inclined relative to the first path L1, balances the temperature gradient difference caused by the relative change in the position of the low reflectivity required area due to the movement of the laser source path during the laser melting of the glass adhesive 102.

[0061] like Figure 9 or Figure 10 As shown, in one embodiment of this application, the cutout portion 111 located in the second sub-region NA22 includes a plurality of second sub-cutout portions 1113, and the projection shape of the second sub-cutout portions 1113 along the direction perpendicular to the plane where the display panel 100 is located is circular or polygonal.

[0062] In this embodiment, a plurality of second sub-cutouts 1113 are provided in the second sub-region NA22, thereby reducing the laser reflectivity in the second sub-region NA22 and ultimately reducing the temperature gradient of the glass adhesive 102 during the melting process.

[0063] In one possible implementation, along the arrangement direction of the first sub-region NA21, the first region NA1, and the second sub-region NA22, the width of the first sub-region NA21 is equal to the width of the second sub-region NA22 and both are smaller than the width of the first region NA1. For example, along the arrangement direction of the first sub-region NA21, the first region NA1 is 155um-220um wide, and the widths of the first sub-region NA21 and the second sub-region NA22 are 100um-150um wide. For instance, the width of the first region NA1 is 200um, the width of the first sub-region NA21 is 125um, and the width of the second sub-region NA22 is 125um.

[0064] In one possible implementation, along the arrangement direction of the first sub-region NA21, the first region NA1, and the second sub-region NA22, the widths of both the first sub-region NA21 and the second sub-region NA22 are smaller than the width of the first region NA1, and the widths of the first sub-region NA21 and the second sub-region NA22 are not the same. For example, along the arrangement direction of the first sub-region NA21, the width of the first region NA1 is 155um-220um, the width of the first sub-region NA21 is 100um-150um, and the width of the second sub-region NA22 is 100um-150um, and the widths of the first sub-region NA21 and the second sub-region NA22 are not the same; for example, the width of the first region NA1 is 210um, the width of the first sub-region NA21 is 130um, and the width of the second sub-region NA22 is 100um.

[0065] To provide better data reference, the energy difference index can be used to characterize the temperature gradient of the silicone sealant. The formula for the energy difference index is as follows: Energy difference index = Center energy index - Non-center energy index = (Initial laser energy) Central Gaussian distribution area (Heat absorption coefficient of silicone sealant 102) (1 + Area percentage of the solid portion 112 in the central region where the silicone sealant 102 is located) - (Initial laser energy) Non-central Gaussian distribution area (Heat absorption coefficient of silicone sealant 102) (1+ glass glue 102) Percentage of the solid part 112 in the non-central area Based on the calculation formula and the aforementioned embodiments, the energy difference index of the experimental control group in Table 1 is 1514, the energy difference index of experimental group 1 is 1954, and the energy difference index of experimental group 2 is 2494. Therefore, in one possible implementation, the energy difference index of the glass sealant in the central region is preferably 1954-2494 (including the endpoint values).

[0066] like Figure 11 As shown, this application embodiment also provides a display device 200, including the display panel 100 provided in any of the foregoing embodiments.

[0067] In this embodiment, the area of ​​the cutout portion in the first region NA1 of the display device is greater than or equal to the area of ​​the solid portion. This means that the opening ratio in the first region NA1 can be as high as 50% or more, and that the area ratio of the solid portion in the first region NA1 is less than or equal to 50%. This can effectively reduce the reflectivity of the laser in the first region NA1, thereby reducing the difference in energy density between the center region and the edge region of the laser spot, and ultimately reducing the temperature gradient during the melting of the glass adhesive. The reduction in the temperature gradient during the melting of the glass adhesive will improve the drop resistance of the display panel.

[0068] The embodiments of this application also need to be explained as follows: (1) The accompanying drawings corresponding to the embodiments of this application only involve the structures involved in the embodiments of this application. Other structures can be referred to the general design.

[0069] (2) For clarity, the thickness of layers or regions is enlarged or reduced in the drawings used to describe embodiments of this application, i.e., these drawings are not drawn to actual scale. It is understood that when an element such as a layer, film, region or substrate is referred to as being "above" or "below" another element, the element may be "directly" located "above" or "below" the other element or there may be intermediate elements.

[0070] (3) Where there is no conflict, the embodiments of this application and the features in the embodiments can be combined with each other to obtain new embodiments. The new embodiments still fall within the scope of disclosure of the embodiments of this application, and the new embodiments can provide support for the protection scope that this application wants to achieve.

[0071] (4) For the same or similar parts between the various embodiments or implementations in this specification, please refer to each other. In particular, for the device embodiments and terminal embodiments, since they are basically similar to the method embodiments or implementations, the description is relatively simple, and the relevant parts can be referred to the description in the method embodiments.

[0072] The above description is merely a specific implementation of the embodiments of this application, but the protection scope of the embodiments of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the protection scope of the embodiments of this application.

Claims

1. A display panel, characterized in that, include: Display area and non-display area; First substrate; A reflective metal is located on one side of the first substrate and in the non-display area. The reflective metal includes a cutout portion and a solid portion. A glass adhesive is located on the side of the reflective metal layer opposite to the first substrate, and the glass adhesive surrounds the display area; The second substrate is located on the side of the glass adhesive that is away from the first substrate; The non-display area includes a first region, which includes a first path. The first path is the movement path of the laser spot center in the packaging process. The area of ​​the hollow part located in the first region is greater than or equal to the area of ​​the solid part located in the first region.

2. The display panel according to claim 1, characterized in that, Within the non-display area, the area of ​​the cutout portion is greater than or equal to the area of ​​the solid portion.

3. The display panel according to claim 2, characterized in that, The hollowed-out portions are evenly distributed on the reflective metal.

4. The display panel according to claim 2, characterized in that, The cutout portion includes multiple sub-cutout portions, and the projection shape of the sub-cutout portions along the direction perpendicular to the plane where the display panel is located is circular or polygonal.

5. The display panel according to claim 1, characterized in that, The non-display area further includes a second area, which is adjacent to the first area, and the first path is located outside the second area. The ratio of the area of ​​the cutout portion in the first area to the area of ​​the first area is a first ratio, and the ratio of the area of ​​the cutout portion in the second area to the area of ​​the second area is a second ratio. The first ratio is greater than the second ratio.

6. The display panel according to claim 5, characterized in that, The boundary line of the second region coincides with at least a portion of the boundary line of the reflective metal.

7. The display panel according to claim 5, characterized in that, The second region includes a first sub-region and a second sub-region. The first sub-region is located on the side closer to the display area, and the second sub-region is located on the side of the first sub-region farther from the display area. The ratio of the area of ​​the cutout portion in the first sub-region to the area of ​​the first sub-region is a first sub-ratio, and the ratio of the area of ​​the cutout portion in the second sub-region to the area of ​​the second sub-region is a second sub-ratio. The first ratio is greater than both the first sub-ratio and the second sub-ratio.

8. The display panel according to claim 7, characterized in that, The extension direction of the hollow portion located in the first region intersects the first path and the intersection angle is not equal to ninety degrees.

9. The display panel according to claim 7, characterized in that, The first sub-ratio is not equal to the second sub-ratio.

10. The display panel according to claim 7, characterized in that, The hollow portion located in the first region extends in a curved direction.

11. The display panel according to claim 10, characterized in that, The cutout portion located in the first area includes several first sub-cutout portions. The first sub-cutout portions are S-shaped in projection along the direction perpendicular to the plane where the display panel is located, and the S-shape is inclined relative to the first path.

12. The display panel according to claim 10, characterized in that, The cutout portion located in the second sub-region includes several second sub-cutout portions, and the projection shape of the second sub-cutout portions along the direction perpendicular to the plane where the display panel is located is circular or polygonal.

13. A display device, characterized in that, Includes the display panel as described in any one of claims 1-12.

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