LCD panel and display device

Abstract

A liquid crystal display panel (2) and a display device are disclosed. The liquid crystal display panel (2) includes an array substrate (21), a counter substrate (22), a liquid crystal layer (23), and a sealant (24). The sealant (24) includes a plurality of extensions (241) and a plurality of arc-shaped corner portions (242), the arc-shaped corner portions (242) connecting to the extensions (241). The liquid crystal display panel (2) has opposing first sides (DP) and second sides (DPO), the first side (DP) being the side closest to the bonding area of ​​the array substrate (21). The sealant (24) is attached to the extensions (241) of the first side (DP) and the liquid crystal display panel (2). The edges are spaced apart, and other extensions (241) are flush with the edges of the liquid crystal display panel (2); the first arc-shaped corner (2421) of the plurality of arc-shaped corners (242) is close to the first side (DP), and the second arc-shaped corner (2422) is close to the second side (DPO); the second arc-shaped corner (2422) has a greater curvature than the first arc-shaped corner (2421), which can make the gap between the sealant (24) and the edge of the liquid crystal display panel (2) as small as possible, thereby reducing the torque of the stress on the corner when the liquid crystal display panel (2) is dropped, and reducing the risk of separation of the sealant (24) from its bonding interface.

Description

Liquid crystal display panel and display device TECHNICAL FIELD

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

[0002] In a liquid crystal display (LCD) panel, an array substrate and a counter substrate are oppositely arranged, and liquid crystal is filled between the array substrate and the counter substrate. A polyimide (PI) alignment layer needs to be coated on the array substrate and the counter substrate to guide the ordered deflection of liquid crystal molecules. In addition, a sealant is arranged around the liquid crystal to achieve sealing, in order to meet the requirements of manufacturing process and product reliability.

[0003] Drop test is included in the reliability test of the liquid crystal display panel. Each corner of the liquid crystal display panel needs to be sequentially dropped onto a drop surface to observe the structural changes in the liquid crystal display panel and detect whether any defects occur, so that the drop test can be used to evaluate the drop resistance of the liquid crystal display panel and the functional integrity after the drop.

[0004] During the drop test of the corners of the existing liquid crystal display panel, it is found that the corners of the liquid crystal display panel are prone to liquid leakage. The reason is that the corners of the liquid crystal display panel are deformed during the drop, the sealant is separated from the alignment layer due to the pulling of the structures on both sides, and the liquid crystal leaks out. In view of the above liquid leakage problem, the internal structure of the liquid crystal display panel needs to be improved to improve the reliability of the product.

[0005] SUMMARY

[0006] The present application provides a liquid crystal display panel and a display device to improve the drop resistance of the product.

[0007] In a first aspect, the present application provides a liquid crystal display panel, which comprises:

[0008] an array substrate and a counter substrate oppositely arranged;

[0009] a liquid crystal layer located between the array substrate and the counter substrate;

[0010] a sealant located between the array substrate and the counter substrate and surrounding the liquid crystal layer; the sealant comprises a plurality of extension portions and a plurality of arc-shaped corner portions for connecting the extension portions;

[0011] The liquid crystal display panel has opposite first and second sides, the first side being a side close to a bonding area of the array substrate; the extension part close to the first side in the sealant has a gap with the edge of the liquid crystal display panel, and other extension parts are flush with the edge of the liquid crystal display panel; the plurality of arc-shaped corner parts include a first arc-shaped corner part and a second arc-shaped corner part, the first arc-shaped corner part being close to the first side, and the second arc-shaped corner part being close to the second side.

[0012] Two straight lines extending along the width direction of the first arc-shaped corner part from any two points on the edge of the first arc-shaped corner part close to the first side intersect at a first intersection point, and two straight lines extending along the width direction of the second arc-shaped corner part from any two points on the edge of the second arc-shaped corner part close to the second side intersect at a second intersection point, the maximum distance between the first intersection point and the edge of the first arc-shaped corner part away from the first side being a first distance, and the maximum distance between the second intersection point and the edge of the second arc-shaped corner part away from the second side being a second distance, the second distance being less than the first distance.

[0013] In some embodiments of the present application, the orthographic projection of the opposite substrate on the array substrate exposes a partial area of the first side of the array substrate, and the extension part close to the first side in the sealant is flush with the edge of the opposite substrate.

[0014] In some embodiments of the present application, the radius of curvature of the second arc-shaped corner part is less than the radius of curvature of the first arc-shaped corner part.

[0015] In some embodiments of the present application, the radius of curvature of the second arc-shaped corner part is 0.8mm-1.2mm.

[0016] In some embodiments of the present application, a straight line extending along the width direction of the first arc-shaped corner part from a corner formed by the edges of the opposite substrate and the intersection point of the first arc-shaped corner part close to the first side edge is a third intersection point, and the distance between the third intersection point and the corner is a third distance.

[0017] A straight line extending along the width direction of the second arc-shaped corner part from a corner formed by the edges of the opposite substrate and the intersection point of the second arc-shaped corner part close to the second side edge is a fourth intersection point, and the distance between the fourth intersection point and the corner is a fourth distance; the fourth distance is less than the third distance.

[0018] In some embodiments of the present application, the third distance is 500μm-650μm, and the fourth distance is 800μm-950μm.

[0019] In some embodiments of the present application, the liquid crystal display panel further comprises a first alignment layer and a second alignment layer, the first alignment layer is located on a side of the array substrate facing the liquid crystal layer, and the second alignment layer is located on a side of the opposite substrate facing the liquid crystal layer.

[0020] The first alignment layer and / or the second alignment layer have a hollow region, and at least the second arc-shaped corner portion is located in the hollow region; the arc-shaped corner portion located in the hollow region has a spacing from the edge of the hollow region.

[0021] In some embodiments of the present application, the spacing between the edge of the hollow region close to the second side and the arc-shaped corner portion is 0.5mm-1mm.

[0022] In some embodiments of the present application, the first arc-shaped corner portion is located in the hollow region, and the spacing between the edge of the hollow region and the first arc-shaped corner portion is less than or equal to 0.5mm.

[0023] In some embodiments of the present application, the array substrate comprises an inorganic protective layer, the inorganic protective layer is located on a side of the first alignment layer away from the liquid crystal layer, the hollow portion exposes part of the area of the inorganic protective layer, and the bonding force between the inorganic protective layer and the sealant is greater than the bonding force between the first alignment layer and the sealant.

[0024] In some embodiments of the present application, the opposite substrate comprises a flat layer, the flat layer is located on a side of the second alignment layer away from the liquid crystal layer, the hollow portion exposes part of the area of the flat layer, and the bonding force between the flat layer and the sealant is greater than the bonding force between the second alignment layer and the sealant.

[0025] In some embodiments of the present application, the bonding force between the inorganic protective layer and the sealant is greater than or equal to 3.3kgf / cm; and / or, the bonding force between the flat layer and the sealant is greater than or equal to 3.3kgf / cm.

[0026] In some embodiments of the present application, the array substrate comprises an organic film layer, the organic film layer has at least one groove, and the sealant extends into the groove; the width of the groove is 1%L-3.3%L, wherein L represents the width of the sealant.

[0027] In some embodiments of the present application, the width of the groove is 10μm-30μm.

[0028] In some embodiments of the present application, the organic film layer has a plurality of grooves, and the spacing between adjacent grooves is 10μm-30μm.

[0029] In some embodiments of the present application, the number of the grooves in the organic film layer is 2-4.

[0030] In a second aspect, the present application also provides a display device, comprising a cover plate, an adhesive layer and the liquid crystal display panel of any one of the embodiments of the first aspect, the adhesive layer being located between the cover plate and the liquid crystal display panel; a normal projection of the adhesive layer on the liquid crystal display panel overlaps with the sealant portion.

[0031] The distance between the edge of the adhesive layer and the edge of the liquid crystal display panel is 0.46%a-0.66%a, wherein the liquid crystal display panel comprises a side edge with a first length and a side edge with a second length, the first length being smaller than the second length, and a represents the first length.

[0032] In some embodiments of the present application, the normal projection of the second arc-shaped corner portion in the sealant on the liquid crystal display panel covers the normal projection of the corner formed by the intersection of the edge of the adhesive layer and the edge of the liquid crystal display panel on the liquid crystal display panel.

[0033] In some embodiments of the present application, the distance between the edge of the adhesive layer and the edge of the liquid crystal display panel is 0.7mm-1mm.

[0034] The present application has the following beneficial effects:

[0035] The application provides a liquid crystal display panel and a display device, wherein the liquid crystal display panel comprises: an array substrate and a counter substrate arranged oppositely; a liquid crystal layer located between the array substrate and the counter substrate; a sealant located between the array substrate and the counter substrate and surrounding the liquid crystal layer; the sealant comprises a plurality of extension parts and a plurality of arc-shaped corner parts, and the arc-shaped corner parts are used for connecting the extension parts; the liquid crystal display panel has opposite first and second sides, and the first side is a side close to a binding area of the array substrate; the extension part close to the first side in the sealant has a gap with the edge of the liquid crystal display panel, and the other extension parts are flush with the edge of the liquid crystal display panel; the plurality of arc-shaped corner parts comprises a first arc-shaped corner part and a second arc-shaped corner part, the first arc-shaped corner part is close to the first side, and the second arc-shaped corner part is close to the second side; two straight lines extending from any two points on the edge close to the first side along the width direction of the first arc-shaped corner part intersect at a first intersection point, and two straight lines extending from any two points on the edge close to the second side along the width direction of the second arc-shaped corner part intersect at a second intersection point; the maximum distance between the first intersection point and the edge of the first arc-shaped corner part away from the first side is a first distance, and the maximum distance between the second intersection point and the edge of the second arc-shaped corner part away from the second side is a second distance; the second distance is smaller than the first distance, so that the bending degree of the second arc-shaped corner part relative to the first arc-shaped corner part is larger, the distance between the sealant and the edge of the liquid crystal display panel can be as small as possible, and then the torque of the stress on the corner when the liquid crystal display panel falls can be reduced, and the risk of separation of the interface between the sealant and the adhesive can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments of the application. Obviously, the drawings introduced below are only some embodiments of the application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0037] FIG. 1 is a schematic diagram of the cross-sectional structure of a display device provided by an embodiment of the application;

[0038] FIG. 2 is a schematic diagram of the cross-sectional structure of a liquid crystal display panel provided by an embodiment of the application;

[0039] FIG. 3 is a schematic diagram of the planar structure of a liquid crystal display panel in the related art;

[0040] FIG. 4 is a schematic diagram of the planar structure of a liquid crystal display panel provided by an embodiment of the application;

[0041] FIG. 5 is a comparison diagram of the distance between the first arc-shaped corner part and the second arc-shaped corner part and the edge of the liquid crystal display panel provided by an embodiment of the application;

[0042] FIG. 6 is a schematic view of a planar structure of another liquid crystal display panel according to embodiments of the present application;

[0043] FIG. 7 is a schematic view of a planar structure of another liquid crystal display panel according to embodiments of the present application;

[0044] FIG. 8 is a schematic view of a planar structure of another liquid crystal display panel according to embodiments of the present application;

[0045] FIG. 9 is a schematic view of a planar structure of another liquid crystal display panel according to embodiments of the present application;

[0046] FIG. 10 is a schematic view of a planar structure of a display device according to the related art;

[0047] FIG. 11 is a schematic view of a planar structure of a display device according to embodiments of the present application.

[0048] Legend: 1-backlight module, 2-liquid crystal display panel, 3-cover plate, 4-oral glue, 5-adhesive layer, 21-array substrate, 22-opposite substrate, 23-liquid crystal layer, 24-sealant, 211-first substrate, 212-driving circuit, 213-organic film layer, 214-first electrode, 215-inorganic protective layer, 216-second electrode, 221-second substrate, 222-color filter layer, 223-planarization layer, 61-first alignment layer, 62-second alignment layer, DP-first side, DPO-second side, binding area, 241-extension, 242-arc-shaped corner part, 2421-first arc-shaped corner part, 2422-second arc-shaped corner part, K-hollow area, 7-groove, P1-first intersection, P2-second intersection, L1-first interval, L2-second interval, R1-radius of curvature of the first arc-shaped corner part 2421, R2-radius of curvature of the second arc-shaped corner part 2422, P3-third intersection, P4-fourth intersection, d1-third interval, d2-fourth interval. DETAILED DESCRIPTION

[0049] To make the objectives, technical solutions, and superiorities of the embodiments of the present application clearer, the technical solutions will be described below in connection with the drawings accompanying the embodiments of the present application. Obviously, the described embodiments are only a part but not all of the embodiments of the present application. And the embodiments in the present application and the features in the embodiments can be combined with each other without conflict if possible. Based on the described embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of the present application.

[0050] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The words "first", "second", and similar words of distinction do not by themselves indicate any order, quantity, or importance, but are used to distinguish one element from another. The words "include" or "contain" and similar words of inclusion are intended to encompass the elements listed thereafter and their equivalents, without excluding other elements. The words "connect" or "connected" and similar words of connection are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0051] It should be noted that the size and shape of the figures in the drawings do not reflect the true proportions, but are only intended to illustrate the content of the present application. Identical or similar reference numerals represent identical or similar elements or elements having the same or similar functions throughout the drawings.

[0052] FIG. 1 is a schematic view of a cross-sectional structure of a display device according to an embodiment of the present application.

[0053] As shown in FIG. 1, the display device includes a backlight module 1, a liquid crystal display panel 2, and a cover plate 3. The liquid crystal display panel 2 is located on the light exit side of the backlight module 1, and the liquid crystal display panel 2 and the backlight module 1 are fixed by a mouth glue 4. The cover plate 3 is located on the light exit side of the liquid crystal display panel 2, and the cover plate 3 and the liquid crystal display panel 2 have an adhesive layer 5 therebetween to fix the two. During the falling process of the display device, the substrate on the side of the liquid crystal display panel 2 close to the cover plate 3 is pulled by the cover plate 3 and the adhesive layer 5, and the substrate on the side of the liquid crystal display panel 2 close to the backlight module 1 is pulled by the mouth glue 4 and the backlight module 1. Therefore, the sealant 24 between the two substrates in the liquid crystal display panel 2 may be separated from the interface adhered therebetween under the action of the pulling force in the opposite direction.

[0054] FIG. 2 is a schematic view of a cross-sectional structure of a liquid crystal display panel according to an embodiment of the present application.

[0055] FIG. 2 shows the enlarged structure of the region Q1 in FIG. 1. As shown in FIG. 2, the liquid crystal display panel 2 includes an array substrate 21 and a counter substrate 22 arranged oppositely, and a liquid crystal layer 23 is located between the array substrate 21 and the counter substrate 22. The array substrate 21 is located on the side close to the backlight module 1, and the counter substrate 22 is located on the side close to the cover plate 3. In actual applications, the positions of the two can be interchanged. The counter substrate 22 may be, for example, a color filter substrate, but is not limited thereto.

[0056] The array substrate 21 at least includes a first substrate 211, and a driving circuit 212, an organic film layer 213, a first electrode 214, an inorganic protective layer 215 and a second electrode 216 which are sequentially stacked on the first substrate 211. The opposite substrate 22 at least includes a second substrate 221, a color film layer 222 on the second substrate 221, and a planar layer 223 on the side of the color film layer 222 away from the second substrate 221. The color film layer 222 can include a color film (CF) and a black matrix (BM). It can be seen that the array substrate 21 has more film layers and a more complex structure.

[0057] It can be understood that the specific structures of the array substrate 21 and the opposite substrate 22 can be designed according to actual products, and the embodiment of the present application is only described by taking the structure shown in FIG. 2 as an example.

[0058] The frame sealant 24 is located between the array substrate 21 and the opposite substrate 22 and surrounds the liquid crystal layer 23. The first alignment layer 61 is located on the side of the array substrate 21 facing the liquid crystal layer 23, and has the same surface shape as the surface shape of the opposite substrate 22. The second alignment layer 62 is located on the side of the opposite substrate 22 facing the liquid crystal layer 23, and has the same surface shape as the surface shape of the array substrate 21. The frame sealant 24 is bonded to the first alignment layer 61 and the second alignment layer 62 on both sides, and has a shape that is adapted to the surface shape of the bonding surface.

[0059] During the drop test, the interface between the frame sealant 24 and the first alignment layer 61, and the interface between the frame sealant 24 and the second alignment layer 62 can be separated to cause liquid leakage. Since the structure of the array substrate 21 is more complex, the flatness of the surface of the array substrate 21 is lower than that of the opposite substrate 22. For example, the array substrate 21 can also have a groove 7 as shown in FIG. 2, which causes the bonding strength between the frame sealant 24 and the first alignment layer 61 to be relatively low, so that the side of the frame sealant 24 bonded to the first alignment layer 61 is prone to separation during the drop test.

[0060] In view of this, the embodiment of the present application designs the frame sealant 24 and its adjacent film layers to improve the drop resistance of the liquid crystal display panel 2.

[0061] FIG. 3 is a schematic plan view of a liquid crystal display panel in the related art.

[0062] As shown in FIG. 3, the liquid crystal display panel 2 has a first side DP and a second side DPO opposite to each other, the first side DP is a side close to the binding area of the array substrate 21. The normal projection of the opposite substrate 22 on the array substrate 21 exposes a part of the first side DP of the array substrate 21, i.e. the array substrate 21 protrudes a region Q2 at the first side DP, and the binding area is arranged on the first substrate 211 in the region Q2. The sealant 24 needs to be arranged between the array substrate 21 and the opposite substrate 22, and cannot cover the region Q2 on the array substrate 21.

[0063] The sealant 24 includes a plurality of extending portions 241 and a plurality of arc-shaped corner portions 242, the arc-shaped corner portions 242 are used to connect the extending portions 241, wherein the extending direction of the extending portions 241 of the sealant 24 is the same as that of the edges near the extending portions 241, and the limitation of the existing process and production equipment precision causes the corners of the sealant 24 to be arc-shaped, so that the arc-shaped corner portions 242 inevitably have a spacing with the edges of the display panel.

[0064] When the corner of the liquid crystal display panel 2 falls, the greater the spacing between the arc-shaped corner portion 242 and the liquid crystal display panel 2, the greater the moment of the impact force of the falling surface on the arc-shaped corner portion 242, and the more likely to cause the separation of the interface between the arc-shaped corner portion 242 and the adhesive. Referring to FIG. 3, the shape of the arc-shaped corner portion 242 in the related art is a circular arc shape, the curvature radius R of the arc-shaped corner portion 242 is 1.5 mm, the spacing d of the corner formed by the intersection of the arc-shaped corner portion 242 and the edge of the liquid crystal display panel 2 is 800 μm-950 μm, and the width L of the sealant 24 is 900 μm-1000 μm.

[0065] Referring to FIG. 3, in the process of falling test of the liquid crystal display panel 2, when the corner of the first side DP falls to the falling surface, the protruding region Q2 on the array substrate 21 first contacts the falling surface, and the first substrate 211 can bear a part of the impact force, thereby reducing the size of the force borne by the sealant 24. Therefore, under the premise of the same height and weight, the different corners of the liquid crystal display panel 2 are made to fall to the falling surface, the arc-shaped corner portion 242 close to the first side DP is not easy to separate from the interface adhered thereto, and the arc-shaped corner portion 242 close to the second side DPO is more likely to separate from the interface adhered thereto than the arc-shaped corner portion 242 close to the first side DP.

[0066] FIG. 4 is a plan structure schematic diagram of a liquid crystal display panel provided by an embodiment of the present application.

[0067] As shown in FIG. 4, in the embodiment of the present application, the plurality of arc-shaped corners 242 includes a first arc-shaped corner 2421 and a second arc-shaped corner 2422, the first arc-shaped corner 2421 is close to the first side DP of the liquid crystal display panel 2, and the second arc-shaped corner 2422 is close to the second side DPO of the liquid crystal display panel 2. Among them, the extension part 241 close to the first side DP in the frame sealant 24 has a gap with the edge of the liquid crystal display panel 2, and the other extension parts 241 are flush with the edge of the liquid crystal display panel 2. Compared with FIG. 3, it can be seen that under the premise that the bending degree of the arc-shaped corner 242 does not change, the above design can minimize the distance between the second arc-shaped corner 2422 of the frame sealant 24 and the corner of the liquid crystal display panel 2, so as to reduce the torque of the impact force of the falling face of the liquid crystal display panel 2 on the arc-shaped corner 242 as much as possible, and reduce the risk of separation of the interface bonded with the second arc-shaped corner 2422.

[0068] FIG. 5 is a comparison diagram of the distance between the first arc-shaped corner and the second arc-shaped corner and the edge of the liquid crystal display panel provided by the embodiment of the present application.

[0069] As shown in FIG. 5, in the embodiment of the present application, the second arc-shaped corner 2422 is more curved than the first arc-shaped corner 2421. Specifically, two straight lines extending along the width direction of the first arc-shaped corner 2421 from any two points on the edge close to the first side DP of the first arc-shaped corner 2421 intersect at a first intersection point P1, and two straight lines extending along the width direction of the second arc-shaped corner 2422 from any two points on the edge close to the second side DPO of the second arc-shaped corner 2422 intersect at a second intersection point P2. The maximum distance between the first intersection point P1 and the edge of the first arc-shaped corner 2421 away from the first side DP is a first distance L1, and the maximum distance between the second intersection point P2 and the edge of the second arc-shaped corner 2422 away from the second side DPO is a second distance L2. The second distance L2 is less than the first distance L1, so as to further reduce the distance between the second arc-shaped corner 2422 and the corner of the liquid crystal display panel 2, and reduce the risk of separation of the interface bonded with the second arc-shaped corner 2422.

[0070] It can be understood that the width of the first arc-shaped corner 2421 refers to the length of the shortest line segment between the edge close to the first side DP and the edge away from the first side DP of the first arc-shaped corner 2421, and the direction along the shortest line segment is the width direction of the first arc-shaped corner 2421; the width of the second arc-shaped corner 2422 refers to the length of the shortest line segment between the edge close to the second side DPO and the edge away from the second side DPO of the second arc-shaped corner 2422, and the direction along the shortest line segment is the width direction of the second arc-shaped corner 2422.

[0071] In the embodiments of the present application, the first arc-shaped corner portion 2421 and the second arc-shaped corner portion 2422 can be circular arcs, and the first spacing L1 corresponds to the radius of curvature R1 of the first arc-shaped corner portion 2421, the second spacing L2 corresponds to the radius of curvature R2 of the second arc-shaped corner portion 2422, and the radius of curvature R2 of the second arc-shaped corner portion 2422 is smaller than the radius of curvature R1 of the first arc-shaped corner portion 2421.

[0072] In the embodiments of the present application, the radius of curvature R1 of the second arc-shaped corner portion 2422 can be 0.8 mm to 1.2 mm, and for example, the radius of curvature R1 of the second arc-shaped corner portion 2422 can be 0.8 mm, 1.0 mm or 1.2 mm; and the radius of curvature R2 of the first arc-shaped corner portion 2421 can be 1.5 mm.

[0073] In the following embodiments, the case where each arc-shaped corner portion 242 is a circular arc is taken as an example for description. In addition, it can be understood that, since the width of the arc-shaped corner portion 242 is generally uniform, the radius of curvature of the arc-shaped corner portion 242 can refer to the radius of curvature of the edge of the arc-shaped corner portion 242 close to the edge of the liquid crystal display panel 2, or the radius of curvature of the edge of the arc-shaped corner portion 242 away from the edge of the liquid crystal display panel 2.

[0074] As shown in FIGS. 4 and 5, a straight line extending along the width direction of the first arc-shaped corner portion 2421 from a corner formed by the intersection of the edges of the opposite substrate 22 and the intersection point of the straight line and the edge of the first arc-shaped corner portion 2421 close to the first side DP is the third intersection point P3, and the spacing between the third intersection point P3 and the corner is the third spacing d1; a straight line extending along the width direction of the second arc-shaped corner portion 2422 from a corner formed by the intersection of the edges of the opposite substrate 22 and the intersection point of the straight line and the edge of the second arc-shaped corner portion 2422 close to the second side DPO is the fourth intersection point P4, and the spacing between the fourth intersection point P4 and the corner is the fourth spacing d2.

[0075] In the embodiments of the present application, by making the extension portion 241 close to the second side DPO of the liquid crystal display panel 2 flush with the edge of the liquid crystal display panel 2 and cooperating with the second arc-shaped corner portion 2422 with a larger bending degree, the fourth spacing d2 is smaller than the third spacing d1, so that the moment of the impact force of the corner drop of the liquid crystal display panel 2 against the second arc-shaped corner portion 2422 can be reduced, the risk of separation of the interface between the second arc-shaped corner portion 2422 and the adhesive can be reduced, and the problem of liquid leakage can be prevented.

[0076] Considering the process errors that can occur in the actual production process, the third spacing d1 can be 800 μm to 950 μm, and the fourth spacing d2 can be 500 μm to 650 μm.

[0077] The liquid crystal display panel 2 shown in FIG. 4 is subjected to a drop test in the embodiment of the present application, and the test method is as follows: an iron block with a weight of 136 g is attached to a corner of the second side DPO of the liquid crystal display panel 2, the dropping surface is marble and anti-static leather, and the liquid crystal display panel 2 is dropped at different heights until liquid leakage occurs. Under the same test method, the liquid crystal display panel 2 in the related art has liquid leakage at a height of 50 cm, while the liquid crystal display panel 2 provided in the embodiment of the present application has liquid leakage at a height of 150 cm or above. It can be seen that the above design can improve the drop resistance of the liquid crystal display panel 2, and the reliability is better.

[0078] FIG. 6 is a schematic diagram of a planar structure of another liquid crystal display panel provided in the embodiment of the present application.

[0079] As shown in FIG. 6, the extension part 241 of the frame sealant 24 close to the first side DP of the liquid crystal display panel 2 can also be flush with the edge of the counter substrate 22, thereby reducing the distance between the first arc-shaped corner part 2421 of the first side DP and the corner of the liquid crystal display panel 2, and further reducing the risk of separation of the interface between the first arc-shaped corner part 2421 and the adhesive.

[0080] The curvature radius of the first arc-shaped corner part 2421 can also be designed to be a small value, and can be the same as the curvature radius of the arc-shaped corner part 242 of the second side DPO, thereby further reducing the distance between the first arc-shaped corner part 2421 and the corner of the liquid crystal display panel 2. The design of the embodiment of the present application can be applicable to the case where the overall structural strength of the liquid crystal display panel 2 is poor.

[0081] In the embodiment of the present application, the curvature radius R1 of the first arc-shaped corner part 2421 and the curvature radius R2 of the second arc-shaped corner part 2422 can both be 0.8 mm to 1.2 mm. For example, the curvature radius of the arc-shaped corner part 242 can be 0.8 mm, 1.0 mm or 1.2 mm; the third distance d1 and the fourth distance d2 are both 500 μm to 650 μm.

[0082] FIG. 7 is a schematic diagram of a planar structure of another liquid crystal display panel provided in the embodiment of the present application.

[0083] Since the polarity of the PI alignment layer surface and the frame sealant 24 is greatly different, the adhesion between them is poor, the interface between the frame sealant 24 and the PI alignment layer is prone to separation, and the bonding force between the PI alignment layer and the frame sealant 24 is 2.9 kgf / cm. As shown in FIG. 7, the first alignment layer 61 and the second alignment layer 62 have a hollow region K in the embodiment of the present application, and the second arc-shaped corner part 2422 is located in the hollow region K, thereby avoiding contact between the second arc-shaped corner part 2422 and the hollow region K.

[0084] Referring to FIGS. 2 and 7, the array substrate 21 includes an inorganic protective layer 215 located on the side of the first alignment layer 61 away from the liquid crystal layer 23, and thus the hollowed-out portion of the first alignment layer 61 can expose part of the inorganic protective layer 215. The adhesion of the inorganic protective layer 215 to the sealant 24 is greater than the adhesion of the PI to the sealant 24. For example, the adhesion of the inorganic protective layer 215 to the sealant 24 is greater than or equal to 3.3 kgf / cm. In one possible implementation, the adhesion of the inorganic protective layer 215 to the sealant 24 is 3.5 kgf / cm.

[0085] Referring to FIGS. 2 and 7, the opposite substrate 22 includes a planar layer 223, which can be made of OC photoresist, for example. The planar layer 223 is located on the side of the first alignment layer 61 away from the liquid crystal layer 23, and thus the hollowed-out portion of the second alignment layer 62 can expose part of the planar layer 223. The adhesion of the planar layer 223 to the sealant 24 is greater than the adhesion of the PI to the sealant 24. For example, the adhesion of the planar layer 223 to the sealant 24 is greater than or equal to 3.3 kgf / cm.

[0086] Therefore, in the embodiments of the present application, the adhesion between the film layer structure exposed by the hollowed-out region K in the first alignment layer 61 and the second alignment layer 62 and the sealant 24 is stronger than the adhesion between the alignment layer and the sealant 24, which can increase the bonding strength of the sealant 24 to the interface in contact with the sealant 24 and reduce the risk of interface separation of the arc-shaped corner portion 242.

[0087] The liquid crystal display panel 2 shown in FIG. 7 is subjected to a drop test according to the embodiments of the present application. The test method is as follows: an iron block with a weight of 136 g is attached to the corner of the second side DPO of the liquid crystal display panel 2, the dropping surface is marble and anti-static leather, and the liquid crystal display panel 2 is dropped at gradually increasing heights until liquid leakage occurs. Under the same test method, the liquid crystal display panel 2 in the related art leaks at a height of 50 cm, while the liquid crystal display panel 2 provided by the embodiments of the present application leaks at a height of 150 cm or above. It can be seen that the above design can improve the drop resistance of the liquid crystal display panel 2 and the reliability is better.

[0088] In actual applications, the hollowed-out region K can be formed only in the first alignment layer 61, only in the second alignment layer 62, or in both the first alignment layer 61 and the second alignment layer 62, which is not limited herein and is described only by taking the case where the hollowed-out region K is formed in both the first alignment layer 61 and the second alignment layer 62. The hollowed-out region K can be formed by hollowing out the APR plate. The shape of the hollowed-out region K can be designed according to actual conditions, which is not limited herein.

[0089] FIG. 8 is a schematic diagram of a planar structure of another liquid crystal display panel according to an embodiment of the present application.

[0090] As shown in FIG. 8, the first alignment layer 61 and the second alignment layer 62 near the first side DP can also form a hollow region K, and the first arc-shaped corner portion 2421 is located in the hollow region K, so as to increase the bonding strength of the sealant 24 near the first side DP and the contact interface thereof.

[0091] As shown in FIGS. 7 and 8, considering the process error that can be generated in the actual production process, the edge of the hollow region K in the alignment layer is spaced apart from the arc-shaped corner portion 242 when designed, so as to ensure that the sealant 24 cannot contact the PI alignment layer, and at the same time, ensure that the PI alignment layer on both sides of the display area AA is not missing, that is, the first alignment layer 61 and the second alignment layer 62 completely cover the display area AA.

[0092] For example, in the embodiment shown in FIG. 7, the edge of the hollow region K near the second side DPO is spaced apart from the second arc-shaped corner portion 2422 by a distance b1 of 0.5 mm to 1 mm; in the embodiment shown in FIG. 8, the edge of the hollow region K near the second side DPO is spaced apart from the second arc-shaped corner portion 2422 by a distance b1 of 0.5 mm to 1 mm, the edge of the hollow region K near the first side DP is spaced apart from the first arc-shaped corner portion 2421 by a distance b2 less than or equal to 0.5 mm, and the edge of the hollow region K does not contact the first arc-shaped corner portion 242.

[0093] It can be understood that the hollow design in the PI alignment layer can also be applied to the liquid crystal display panel shown in FIG. 6, and at this time, the edge of the hollow region K near the first side DP and the second side DPO is spaced apart from the arc-shaped corner portion 242 by a distance of 0.5 mm to 1 mm. The repeated parts will not be described here.

[0094] FIG. 9 is a schematic diagram of a planar structure of another liquid crystal display panel according to an embodiment of the present application.

[0095] As shown in FIGS. 2 and 9, the array substrate 21 includes an organic film layer 213, the organic film layer 213 has a groove 7, and the sealant 24 extends into the groove 7. Since the organic film layer 213 has water absorption, the groove 7 provided in the organic film layer 213 can block the path of water vapor entering the display panel, reduce the corrosion of the internal structure of the array substrate 21 by the ambient water vapor, and be beneficial to improve the performance stability of the array substrate 21.

[0096] In the related art, the width of the groove 7 in the organic film layer 213 and the spacing of adjacent grooves 7 are not uniform. For example, grooves 7 with different widths are simultaneously provided in the organic film layer 213, the width of the groove 7 is 250 μm, 410 μm, and 250 μm, the spacing of adjacent grooves 7 is 50 μm and 80 μm, and the width and spacing of the groove 7 are relatively large, which causes the surface of the organic film layer 213 to have a large fluctuation and a low degree of planarization, and affects the bonding strength of the bonding interface between the sealant 24 and the side of the array substrate 21.

[0097] In the embodiment of the present application, the width of the groove 7 in the organic film layer 213 is designed to be 1%L-3.3%L, where L represents the width of the sealant 24. It can be seen that the width w1 of the groove 7 is much smaller than the width L of the sealant 24, and the fluctuation of the surface of the sealant 24 near the side of the array substrate 21 is small enough relative to the entire bonding interface on the side, so that the bonding interface is not easy to separate. For example, the width w1 of the groove 7 in the organic film layer 213 is designed to be 10 μm-30 μm, which is small enough under the premise of meeting the process accuracy.

[0098] The organic film layer 213 can have a plurality of grooves 7 to ensure that water vapor does not enter the inside of the array substrate 21. For example, the number of grooves 7 in the organic film layer 213 can be 2-4, and the spacing w2 of adjacent grooves 7 is 10 μm-30 μm.

[0099] FIG. 10 is a schematic plan view of a display device in the related art.

[0100] Referring to FIGS. 1 and 10, the display device includes a cover plate 3, an adhesive layer 5, and a liquid crystal display panel 2. The adhesive layer 5 is located between the cover plate 3 and the liquid crystal display panel 2. From the top view, the orthogonal projection of the adhesive layer 5 on the liquid crystal display panel 2 partially overlaps the sealant 24, but the orthogonal projection of the corner formed by the edges of the adhesive layer 5 on the liquid crystal display panel 2 does not overlap the orthogonal projection of the arc-shaped corner portion 242 in the sealant 24 on the liquid crystal display panel 2. In the related art, the spacing s1 between the edge of the adhesive layer 5 and the edge of the substrate in the liquid crystal display panel 2 is 0.2 mm.

[0101] FIG. 11 is a schematic plan view of a display device according to an embodiment of the present application.

[0102] As shown in FIG. 11, in the embodiment of the present application, the spacing s2 between the edge of the adhesive layer 5 and the edge of the liquid crystal display panel 2 is 0.46%a-0.66%a, where the liquid crystal display panel 2 includes a side with a first length and a side with a second length, the first length is smaller than the second length, and a represents the first length, i.e., the length of the shorter side of the liquid crystal display panel 2.

[0103] As shown in FIG. 10 and FIG. 11, the edge of the adhesive layer 5 in the embodiment of the present application is relatively closer to the inside, so that the pulling force of the cover plate 3 on the adjacent opposite substrate 22 is closer to the inside during the falling process, and the pulling force on the corner of the opposite substrate 22 is reduced, so that the liquid crystal display panel 2 is not easy to separate. Moreover, the distance between the edge of the adhesive layer 5 and the edge of the liquid crystal display panel 2 is small enough relative to the length of the shorter side of the liquid crystal display panel 2, and the bonding strength of the liquid crystal display panel 2 and the cover plate 3 can be ensured.

[0104] For example, the distance s2 between the edge of the adhesive layer 5 and the edge of the liquid crystal display panel 2 is 0.7mm-1mm, which can prevent the bubbles in the adhesive layer 5 during the bonding and avoid the liquid leakage.

[0105] As shown in FIG. 11, the orthographic projection of the second arc-shaped corner portion 2422 on the liquid crystal display panel 2 covers the orthographic projection of the corner formed by the edges of the adhesive layer 5 on the liquid crystal display panel 2, wherein the corner formed by the edges of the adhesive layer 5 can be a sharp corner as shown in FIG. 11, or an arc-shaped corner, which is not limited herein. When the liquid crystal display panel 2 as shown in FIG. 6 is used, the orthographic projection of the first arc-shaped corner portion 2421 on the liquid crystal display panel 2 covers the orthographic projection of the corner formed by the edges of the adhesive layer 5 on the liquid crystal display panel 2.

[0106] The display device shown in FIG. 11 is subjected to the falling test in the embodiment of the present application, and the test method is as follows: an iron block with a weight of 136g is attached to the corner of the second side DPO of the liquid crystal display panel 2, the falling surface is marble and anti-static leather, and the liquid crystal display panel 2 is dropped gradually at different heights until the liquid leakage occurs. Under the same test method, the liquid crystal display panel 2 in the related art leaks at a height of 50cm, while the liquid crystal display panel 2 provided in the embodiment of the present application leaks at a height of 120cm or above, which shows that the above design can improve the anti-falling ability of the liquid crystal display panel 2, and the reliability is better.

[0107] Although the preferred embodiments of the present application have been described, those skilled in the art who are familiar with the basic inventive concept can make further changes and modifications to the embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0108] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A liquid crystal display panel, wherein, The liquid crystal display panel comprises: An array substrate and a counter substrate arranged oppositely; A liquid crystal layer between the array substrate and the counter substrate; A sealant between the array substrate and the counter substrate and surrounding the liquid crystal layer; the sealant comprises a plurality of extending portions and a plurality of arc-shaped corner portions for connecting the extending portions; The liquid crystal display panel has opposite first and second sides, the first side being the side close to the binding area of the array substrate; the extending portion of the sealant close to the first side has a spacing from the edge of the liquid crystal display panel, and the other extending portions are flush with the edge of the liquid crystal display panel; the plurality of arc-shaped corner portions comprise a first arc-shaped corner portion close to the first side and a second arc-shaped corner portion close to the second side; Two straight lines extending from any two points on the edge close to the first side of the first arc-shaped corner portion along the width direction of the first arc-shaped corner portion intersect at a first intersection point, and two straight lines extending from any two points on the edge close to the second side of the second arc-shaped corner portion along the width direction of the second arc-shaped corner portion intersect at a second intersection point; the maximum distance between the first intersection point and the edge of the first arc-shaped corner portion away from the first side is a first distance, and the maximum distance between the second intersection point and the edge of the second arc-shaped corner portion away from the second side is a second distance; the second distance is smaller than the first distance.

2. The liquid crystal display panel of claim 1, wherein, The normal projection of the counter substrate on the array substrate exposes a partial area of the first side of the array substrate, and the extending portion of the sealant close to the first side is flush with the edge of the counter substrate.

3. The liquid crystal display panel according to claim 1 or 2, wherein The radius of curvature of the second arc-shaped corner portion is smaller than that of the first arc-shaped corner portion.

4. The liquid crystal display panel of claim 3, wherein, The radius of curvature of the second arc-shaped corner portion is 0.8 mm to 1.2 mm.

5. The liquid crystal display panel according to any one of claims 1 to 4, wherein A straight line extending from a corner formed by the edges of the counter substrate along the width direction of the first arc-shaped corner portion intersects the first arc-shaped corner portion close to the first side edge at a third intersection point, and the distance between the third intersection point and the corner is a third distance; A straight line extending from the corner formed by the edges of the counter substrate along the width direction of the second arc-shaped corner portion intersects the second arc-shaped corner portion close to the second side edge at a fourth intersection point, and the distance between the fourth intersection point and the corner is a fourth distance; the fourth distance is smaller than the third distance.

6. The liquid crystal display panel of claim 5, wherein, The third distance is 500 μm to 650 μm, and the fourth distance is 800 μm to 950 μm.

7. The liquid crystal display panel according to any one of claims 1 to 6, wherein The liquid crystal display panel further comprises a first alignment layer on the side of the array substrate facing the liquid crystal layer and a second alignment layer on the side of the counter substrate facing the liquid crystal layer; The first alignment layer and / or the second alignment layer have a hollowed-out area, and at least the second arc-shaped corner portion is located in the hollowed-out area; the arc-shaped corner portion located in the hollowed-out area has a spacing from the edge of the hollowed-out area.

8. The liquid crystal display panel of claim 7, wherein, The distance between the edge of the hollowed-out region and the second arc-shaped corner is 0.5mm-1mm.

9. The liquid crystal display panel of claim 8, wherein, The first arc-shaped corner is located in the hollowed-out region, and the distance between the edge of the hollowed-out region and the first arc-shaped corner is less than or equal to 0.5mm.

10. The liquid crystal display panel according to any one of claims 7 to 9, wherein The array substrate comprises an inorganic protective layer, the inorganic protective layer is located on the side of the first alignment layer away from the liquid crystal layer, the hollowed-out portion exposes part of the area of the inorganic protective layer, and the adhesion force between the inorganic protective layer and the sealant is greater than the adhesion force between the first alignment layer and the sealant.

11. The liquid crystal display panel according to any one of claims 7 to 10, wherein The opposite substrate comprises a flat layer, the flat layer is located on the side of the second alignment layer away from the liquid crystal layer, the hollowed-out portion exposes part of the area of the flat layer, and the adhesion force between the flat layer and the sealant is greater than the adhesion force between the second alignment layer and the sealant.

12. The liquid crystal display panel of claim 11, wherein, The adhesion force between the inorganic protective layer and the sealant is greater than or equal to 3.3kgf / cm; And / or, the adhesion force between the flat layer and the sealant is greater than or equal to 3.3kgf / cm.

13. The liquid crystal display panel according to any one of claims 1 to 12, wherein The array substrate comprises an organic film layer, the organic film layer has at least one groove therein, and the sealant extends into the groove; the width of the groove is 1%L-3.3%L, wherein L represents the width of the sealant.

14. The liquid crystal display panel of claim 13, wherein, The width of the groove is 10μm-30μm.

15. The liquid crystal display panel of claim 14, wherein, The organic film layer has a plurality of grooves, and the distance between adjacent grooves is 10μm-30μm.

16. The liquid crystal display panel of claim 15, wherein, The number of grooves in the organic film layer is 2-4.

17. A display device, wherein, The display device comprises a cover plate, an adhesive layer and a liquid crystal display panel as claimed in any one of claims 1-16, the adhesive layer is located between the cover plate and the liquid crystal display panel; the orthogonal projection of the adhesive layer on the liquid crystal display panel partially overlaps the sealant; The distance between the edge of the adhesive layer and the edge of the liquid crystal display panel is 0.46%a-0.66%a, wherein the liquid crystal display panel comprises a side with a first length and a side with a second length, the first length is less than the second length, and a represents the first length.

18. The display device of claim 17, wherein, The orthogonal projection of the second arc-shaped corner in the sealant on the liquid crystal display panel covers the orthogonal projection of the corner formed by the intersection of the edges of the adhesive layer on the liquid crystal display panel.

19. A display device as claimed in claim 17 or 18, wherein, The distance between the edge of the adhesive layer and the edge of the liquid crystal display panel is 0.7mm-1mm.

Images