Display panel

Abstract

A display panel (100). A display portion (FF1) is bent at least in a first direction (X) to form a first cambered surface (101) having a first radius of curvature; a driving chip (15) is bound to a pad portion (FF3); a support pad (12) is provided between the display portion (FF1) and the pad portion (FF3), the support pad (12) is arranged at least corresponding to the driving chip (15), the support pad (12) comprises a first surface (121) facing the display portion (FF1) and a second surface (122) facing the pad portion (FF3), the first surface (121) is fitted to the first cambered surface (101), and the second surface (122) is a flat surface.

Description

A display panel Technical Field

[0001] The present application relates to the field of display, and in particular to a display panel. Background Art

[0002] Flexible display devices such as flexible organic light-emitting display devices (OLED) have been widely used in our daily lives. Display panels with narrow bezels have been developed in which the pad portion is bent to the back side of the display portion through the bending portion. At the same time, display screens with large or fully curved display portions have been developed, and the pad portion will bend according to the curved display portion.

[0003] However, the pad portion bends according to the curved display portion, which may cause the driver chip bound to the pad portion to be deformed or subjected to a large deformation stress, making the driver chip easily damaged. SUMMARY OF THE INVENTION

[0004] The embodiment of the present application provides a display panel that can solve the problem that the pad portion bends according to the curved display portion, which may cause the driver chip bound to the pad portion to deform or be subjected to large deformation stress, making the driver chip easily damaged.

[0005] An embodiment of the present application provides a display panel, comprising:

[0006] The display panel body includes a display portion, a bending portion, and a pad portion connected in sequence, wherein the pad portion is provided on a backlight side of the display portion, the bending portion is ductile, and the display portion is bent at least around a first direction into a first arc shape having a first curvature radius;

[0007] A driving chip is bound and arranged on the pad portion;

[0008] A support pad is arranged between the display part and the pad part, and the support pad is arranged at least corresponding to the driving chip. The support pad includes a first surface facing the display part and a second surface facing the pad part. The first surface is in contact with the first curved surface, and the second surface is a flat surface.

[0009] Optionally, in some embodiments of the present application, the pad portion is connected to an arc-shaped side of the display portion, and the display panel further includes:

[0010] A backplane, comprising a first backplane and a second backplane, wherein the first backplane is attached to a backlight side of the display portion, and the second backplane is attached to a side of the pad portion close to the display portion;

[0011] The first back plate includes a first edge close to the bent portion, and the second back plate includes a second edge close to the bent portion;

[0012] The first edge is straight, the second edge includes a first sub-segment edge corresponding to the middle part of the arc-shaped side of the first arc surface, and the distance from the second edge to the first edge tends to decrease from the center of the first sub-segment edge to the two ends of the first sub-segment edge.

[0013] Optionally, in some embodiments of the present application, the portions of the display portion located on both sides of the first arc surface are respectively bent into a second arc surface and a third arc surface, the second arc surface and the third arc surface have a second curvature radius, and the first curvature radius is greater than the second curvature radius.

[0014] Optionally, in some embodiments of the present application, the second edge includes a second subsegment edge located on one side of the first subsegment edge, and a third subsegment edge located on the other side of the first subsegment edge;

[0015] The edge of the second sub-segment at least corresponds to the second arc surface, and the edge of the third sub-segment at least corresponds to the third arc surface.

[0016] Optionally, in some embodiments of the present application, the method further includes:

[0017] The protective rubber line includes a first sub-protective rubber line and a second sub-protective rubber line. The first sub-protective rubber line is set corresponding to the first edge, and the second sub-protective rubber line is set corresponding to the second edge. The extension direction of the first sub-protective rubber line and the extension direction of the second sub-protective rubber line are respectively the same as the extension direction of the first edge and the extension direction of the second edge.

[0018] Optionally, in some embodiments of the present application, the first sub-protective adhesive line is provided on the first edge, and the second sub-protective adhesive line is provided on the second edge; or

[0019] The first sub-protective adhesive line is disposed on a side of the display panel body away from the first edge, and the second sub-protective adhesive line is disposed on a side of the display panel body away from the second edge.

[0020] Optionally, in some embodiments of the present application, the end of the first back panel close to the bending portion is the first end, the end of the second back panel close to the bending portion is the second end, and the distance from at least part of the first end to the edge of the display panel corresponding to the bending portion is smaller than the distance from the second end to the edge of the display panel corresponding to the bending portion.

[0021] Optionally, in some embodiments of the present application, the pad portion includes a plurality of pad terminals, the plurality of pad terminals are arranged along an extension direction parallel to the first edge, and a distance from any point on the first edge to a straight line where the plurality of pad terminals are located is the same;

[0022] The second edge includes a first point located at any position of the second edge, the distance from the first point to the straight line where the plurality of pad terminals are located is D, the stretching rate of the bending portion between the first point and the first edge is a, and D is inversely correlated with a.

[0023] Optionally, in some embodiments of the present application, in the second direction, the width of the pad portion is smaller than the width of the display portion;

[0024] In the second direction, the width of the support pad is greater than or equal to the width of the pad portion, and the first direction is perpendicular to the second direction;

[0025] The first surface has the same curvature as the first arc-shaped surface.

[0026] Optionally, in some embodiments of the present application, the support pad includes a first sub-support pad and a second sub-support pad, the first sub-support pad and the second sub-support pad are stacked, the width of the first sub-support pad in the second direction is greater than the width of the second sub-support pad in the second direction, the elastic modulus of the first sub-support pad is smaller than the elastic modulus of the second sub-support pad, the first sub-support pad includes a groove on a side surface close to the pad portion, the second sub-support pad is accommodated in the groove, and the orthographic projection of the second sub-support pad on the pad portion covers the orthographic projection of the driver chip on the pad portion;

[0027] A surface of the first sub-support pad close to the pad portion and a surface of the second sub-support pad close to the pad portion are in the same plane.

[0028] Optionally, in some embodiments of the present application, the material of the first sub-support pad includes acrylic resin, and the material of the second sub-support pad includes stainless steel.

[0029] Optionally, in some embodiments of the present application, the support pad includes a third sub-support pad and a fourth sub-support pad, the third sub-support pad includes a first sub-segment and a second sub-segment that are spaced apart, the fourth sub-support pad is disposed between the first sub-segment and the second sub-segment along the second direction, the elastic modulus of the third sub-support pad is smaller than the elastic modulus of the fourth sub-support pad, and the orthographic projection of the fourth sub-support pad on the pad portion covers the orthographic projection of the driver chip on the pad portion;

[0030] The first surface portion corresponding to the first sub-segment has the same curvature as the first arcuate portion corresponding thereto, and the first surface portion corresponding to the second sub-segment has the same curvature as the first arcuate portion corresponding thereto.

[0031] Optionally, in some embodiments of the present application, the first sub-segment and the second sub-segment are respectively arranged between the display portion and the pad portion; one side surface of the fourth sub-support pad is attached to the pad portion, and the other side surface of the fourth sub-support pad is spaced apart from the display portion.

[0032] Optionally, in some embodiments of the present application, the driving chip is arranged on a side of the pad portion away from the display portion. Beneficial effects

[0033] In an embodiment of the present application, a display panel is provided, comprising: a display panel body, comprising a display portion, a bending portion and a pad portion connected in sequence, the pad portion being arranged on one side of the backlight surface of the display portion, the bending portion being ductile, and the display portion being bent at least around a first direction into a first arc shape having a first radius of curvature; a driver chip, bound and arranged on the pad portion; a support pad, arranged between the display portion and the pad portion, the support pad being arranged at least corresponding to the driver chip, the support pad comprising a first surface facing the display portion and a second surface facing the pad portion, the first surface being in contact with the first arc shape, and the second surface being a flat surface. In the present application, the support pad comprises a first surface facing the display portion and a second surface facing the pad portion, the first surface being in contact with the first arc shape, and the second surface being a flat surface, the support pad at least makes the portion where the driver chip is arranged on the pad portion flat, so as to prevent the driver chip from bending with the bending of the display portion or the pad portion, and the support pad provides a flat setting platform for the driver chip, thereby preventing the driver chip bound to the pad portion from being deformed or subjected to large deformation stress, so that the driver chip is not easily damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0035] FIG1 is a schematic top perspective view of the front of a display panel provided in Example 1 of the present application;

[0036] FIG2 is a side perspective schematic diagram of a display panel provided in Example 1 of the present application;

[0037] FIG3 is a top perspective schematic diagram of the back side of a display panel provided in Example 1 of the present application;

[0038] FIG4 is a schematic cross-sectional view of a first type of display panel after bending provided in the first embodiment of the present application;

[0039] FIG5 is a perspective schematic diagram of a first support pad provided in Example 1 of the present application;

[0040] FIG6 is a schematic cross-sectional view of a second type of display panel after bending provided in the second embodiment of the present application;

[0041] FIG7 is a perspective schematic diagram of a second support pad provided in Example 1 of the present application;

[0042] FIG8 is a schematic cross-sectional view of a third type of bent display panel provided in the third embodiment of the present application;

[0043] FIG9 is a perspective schematic diagram of a third support pad provided in Example 3 of the present application;

[0044] FIG10 is a schematic cross-sectional view of a bent portion of a display panel before bending provided in a fourth embodiment of the present application;

[0045] FIG11 is a schematic cross-sectional view of a display panel after bending provided in the fourth embodiment of the present application;

[0046] FIG12 is a schematic diagram of an edge of a bent portion of a display panel provided in a fourth embodiment of the present application;

[0047] FIG13 is a perspective schematic diagram of a display panel provided in a fourth embodiment of the present application after the edge of the bent portion is bent;

[0048] FIG14 is a schematic cross-sectional view of a portion of the film layer at the dotted line DD in FIG13 provided in Example 4 of the present application;

[0049] FIG15 is a schematic cross-sectional view of a portion of the film layer at the dotted line BB in FIG13 provided in Example 4 of the present application;

[0050] FIG16 is a schematic diagram of stress simulation distribution of the bent portion of the display panel after bending according to the fourth embodiment of the present application;

[0051] FIG17 is a schematic diagram of the distance relationship between the first edge of the display panel and the pad terminal according to the fourth embodiment of the present application;

[0052] FIG18 is a schematic diagram of the dispensing positions of the protective adhesive line of a display panel provided in Example 5 of the present application. Modes for Carrying Out the Invention

[0053] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; and "inside" and "outside" refer to the outline of the device.

[0054] The embodiment of the present application provides a display panel, comprising: a display panel body, comprising a display portion, a bending portion and a pad portion connected in sequence, the pad portion being arranged on the backlight side of the display portion, the bending portion having ductility, and the display portion being bent at least around a first direction into a first arc shape having a first radius of curvature; a driver chip, bound and arranged on the pad portion; a support pad, arranged between the display portion and the pad portion, the support pad being arranged at least corresponding to the driver chip, the support pad comprising a first surface facing the display portion and a second surface facing the pad portion, the first surface being in contact with the first arc shape, and the second surface being a flat surface. Detailed descriptions are given below. It should be noted that the description order of the following embodiments does not serve as a limitation on the preferred order of the embodiments.

[0055] Example 1

[0056] Please refer to Figures 1 to 5, Figure 1 is a top-view stereoscopic schematic diagram of the front of a display panel provided in Example 1 of the present application; Figure 2 is a side-view stereoscopic schematic diagram of a display panel provided in Example 1 of the present application; Figure 3 is a top-view stereoscopic schematic diagram of the back of a display panel provided in Example 1 of the present application; Figure 4 is a first cross-sectional schematic diagram of a display panel after bending provided in Example 1 of the present application; Figure 5 is a stereoscopic schematic diagram of the first support pad provided in Example 1 of the present application.

[0057] It should be noted that Figure 1 illustrates the state of the bending portion FF2 before bending, and Figures 2 to 3 illustrate the state of the bending portion FF2 after bending; Figure 4 is a cross-sectional schematic diagram in the direction of the CC dotted line in Figure 2 or Figure 3.

[0058] It should be noted that the present application is described using the bent state of the bending portion FF2 in FIG. 2 and FIG. 3 .

[0059] 1 to 3 illustrate a first direction X and a second direction Y. The first direction X is perpendicular to the second direction Y. The dotted line CC in FIG. 2 or FIG. 3 extends along the second direction Y.

[0060] The present application provides a display panel 100, which includes a display panel body 10, a driver chip 15, and a support pad 12; the display panel body 10 includes a display part FF1, a bending part FF2, and a pad part FF3 connected in sequence, the pad part FF3 is arranged on the backlight side of the display part FF1, the bending part FF2 is ductile, and the display part FF1 is bent at least around the first direction X into a first arc surface 101 with a first curvature radius; the driver chip 15 is bound and arranged on the pad part FF3; the support pad 12 is arranged between the display part FF1 and the pad part FF3, the support pad 12 is arranged at least corresponding to the driver chip 15, and the support pad 12 includes a first surface 121 facing the display part FF1 and a second surface 122 facing the pad part FF3, the first surface 121 is in contact with the first arc surface 101, and the second surface 122 is a flat surface.

[0061] Specifically, in the first direction X, the display panel body 10 includes a display portion FF1 and a pad portion FF3, and a bending portion FF2 located between the display portion FF1 and the pad portion FF3. The bending portion FF2 can be bent to the back side of the display portion FF1 to reduce the frame, and the bending axis of the bending portion FF2 is parallel to the second direction Y.

[0062] Specifically, the direction in which the display portion FF1 , the bending portion FF2 , and the pad portion FF3 are sequentially connected is the first direction X, or the display portion FF1 , the bending portion FF2 , and the pad portion FF3 are sequentially connected along the first direction X.

[0063] Specifically, the display portion FF1 is at least bent into a first arcuate shape 101 having a first curvature radius. When the display portion FF1 is bent or folded into the first arcuate shape 101 having the first curvature radius, the bending axis of the first arcuate shape 101 is parallel to the first direction X.

[0064] Specifically, FIG. 1 shows that the middle portion of the display panel 100 is bent into a first curved surface 101 .

[0065] Specifically, the bending portion FF2 is ductile, the base of the display panel body 10 is ductile and can be stretched or squeezed, and the routing of the bending portion FF2 can be set to a serpentine, S-shaped, Z-shaped, etc. shape to prevent the routing from breaking when the bending portion FF2 is bent.

[0066] Specifically, the bending portion FF2 may be ductile when any existing technology is used.

[0067] In this embodiment, the support pad 12 includes a first surface 121 facing the display part FF1 and a second surface 122 facing the pad part FF3. The first surface 121 is in contact with the first curved surface 101, and the second surface 122 is a flat surface. The support pad 12 at least makes the part where the driver chip 15 is set on the pad part FF3 flat to avoid the driver chip 15 bending with the bending of the display part FF1 or the pad part FF3. The support pad 12 provides a flat setting platform for the driver chip 15, thereby avoiding the driver chip 15 bound to the pad part FF3 from being deformed or subjected to large deformation stress, so that the driver chip 15 is not easily damaged.

[0068] In some embodiments, as shown in Figures 4 and 5, in the second direction Y, the width of the pad portion FF3 is less than the width of the display portion FF1; in the second direction Y, the width of the support pad 12 is greater than or equal to the width of the pad portion FF3, and the first direction X is perpendicular to the second direction Y.

[0069] In some embodiments, in the second direction Y, the width of the pad portion FF3 is smaller than the width of the display portion FF1; in the second direction Y, the width of the support pad 12 is greater than or equal to the width of the pad portion FF3, the first direction X is perpendicular to the second direction Y; the first surface 121 has the same curvature as the first curved surface 101.

[0070] Specifically, in the second direction Y, the width of the pad portion FF3 is smaller than the width of the display portion FF1 , which can reduce the width of the bending portion FF2 and reduce stress concentration.

[0071] Specifically, in the second direction Y, the width of the support pad 12 is greater than or equal to the width of the pad portion FF3 , the first direction X is perpendicular to the second direction Y, and the support pad 12 can provide complete support for the pad portion FF3 .

[0072] Specifically, the first surface 121 has the same curvature as the first curved surface 101 , so that the first surface 121 can be completely matched with the first curved surface 101 or the display portion FF1 .

[0073] Example 2

[0074] The display panel of this embodiment is the same as or similar to that of any one of the first embodiments, and the similarities are not repeated here, and only the differences are described here.

[0075] Please refer to Figures 6 and 7. Figure 6 is a cross-sectional schematic diagram of a second type of display panel after bending provided in Example 2 of the present application; Figure 7 is a three-dimensional schematic diagram of the second type of support pad provided in Example 1 of the present application.

[0076] It should be noted that FIG. 2 to FIG. 3 illustrate the state of the bending portion FF2 after bending; FIG. 6 is a schematic cross-sectional view in the direction of the dotted line CC in FIG. 2 or FIG. 3 .

[0077] In some embodiments, as shown in Figures 6 and 7, the support pad 12 includes a first sub-support pad 1201 and a second sub-support pad 1202, the first sub-support pad 1201 and the second sub-support pad layer 1202 are stacked, the width of the first sub-support pad 1201 in the second direction Y is greater than the width of the second sub-support pad 1202 in the second direction Y, the elastic modulus of the first sub-support pad 1201 is smaller than the elastic modulus of the second sub-support pad 1202, the first sub-support pad 1201 includes a groove 1201A on a side surface close to the pad portion FF3, the second sub-support pad 1202 is accommodated in the groove 1201A, and the orthographic projection of the second sub-support pad 1202 on the pad portion FF3 covers the orthographic projection of the driver chip 15 on the pad portion FF3.

[0078] Specifically, the elastic modulus of the first sub-support pad 1201 is smaller than the elastic modulus of the second sub-support pad 1202. The orthographic projection of the second sub-support pad 1202 on the pad portion FF3 covers the orthographic projection of the driver chip 15 on the pad portion FF3. The function of the second sub-support pad 1202 is to provide flat support for the driver chip 15, and the first sub-support pad 1201 can support other parts of the pad portion FF3.

[0079] Specifically, the elastic modulus of the first sub-support pad 1201 is relatively small, which facilitates manufacturing the surface of the first sub-support pad 1201 as the first surface 121 , and allows the first surface 121 to fit in a shape with the first curved surface 101 .

[0080] In some embodiments, a surface of the first sub-support pad 1201 close to the pad portion FF3 and a surface of the second sub-support pad 1202 close to the pad portion FF3 are in the same plane.

[0081] Specifically, the surface of the first sub-support pad 1201 close to the pad portion FF3 and the surface of the second sub-support pad 1202 close to the pad portion FF3 are on the same plane, so that the first sub-support pad 1201 and the second sub-support pad 1202 provide the same flat surface, which can provide uniform support to each part of the pad portion FF2, thereby improving the reliability of the display panel 100.

[0082] In some embodiments, the material of the first sub-support pad 1201 includes acrylic resin, and the material of the second sub-support pad 1202 includes stainless steel.

[0083] Specifically, the material of the first sub-support pad 1201 includes acrylic resin, which can easily form a shape between the first surface 121 and the second surface 122 that matches the space between the display part FF2 and the pad part FF3; the material of the second sub-support pad 1202 includes stainless steel, which has a large elastic modulus and can provide reliable support and bearing for the driving chip 15 to improve the reliability of the display panel.

[0084] Example 3

[0085] The display panel of this embodiment is the same as or similar to that of any one of the first embodiments, and the similarities are not repeated here, and only the differences are described here.

[0086] Please refer to Figures 8 and 9. Figure 8 is a schematic cross-sectional view of a third type of bent display panel provided in Example 3 of the present application; Figure 9 is a schematic three-dimensional view of the third type of support pad provided in Example 3 of the present application.

[0087] It should be noted that FIG. 2 to FIG. 3 illustrate the state of the bending portion FF2 after bending; FIG. 8 is a schematic cross-sectional view in the direction of the dotted line CC in FIG. 2 or FIG. 3 .

[0088] In some embodiments, the support pad 12 includes a third sub-support pad 1203 and a fourth sub-support pad 1204. The third sub-support pad 1203 includes a first sub-segment 12031 and a second sub-segment 12032 spaced apart from each other. The fourth sub-support pad 1204 is disposed between the first sub-segment 12031 and the second sub-segment 12032 along the second direction Y. The elastic modulus of the third sub-support pad 1203 is smaller than that of the fourth sub-support pad 1204. The orthographic projection of the fourth sub-support pad 1204 on the pad portion FF3 overlaps the orthographic projection of the driver chip 15 on the pad portion FF3. The first surface portion corresponding to the first sub-segment has the same curvature as the portion that is bonded to the corresponding first curved surface. The first surface portion corresponding to the second sub-segment has the same curvature as the portion that is bonded to the corresponding first curved surface.

[0089] Specifically, the orthographic projection of the fourth sub-support pad 1204 on the pad portion FF3 overlaps the orthographic projection of the driver chip 15 on the pad portion FF3. In this case, the fourth sub-support pad 1204 provides flat support and bearing for the driver chip 15, thereby improving the reliability of the display panel 100. Furthermore, the first sub-segment 12031 and the second sub-segment 12032 are spaced apart, and the fourth sub-support pad 1204 is disposed between the first sub-segment 12031 and the second sub-segment 12032 along the second direction Y. This facilitates the attachment and support of the first sub-segment 12031 and the second sub-segment 12032, thereby improving production yield.

[0090] Specifically, the curvature of the first surface 121 portion corresponding to the first sub-segment 12031 is the same as the curvature of the first arc surface 101 portion corresponding to the fitting portion, so that the first arc surface 101 portion corresponding to the first surface 121 portion corresponding to the first sub-segment 12031 is completely matched and fitted, which helps to maintain the shape of the first arc surface 101 at the fitting portion.

[0091] Specifically, the portion of the first surface 121 corresponding to the second sub-segment 12032 has the same curvature as the portion of the first curved surface 101 that is bonded to it, ensuring a perfect match and bond between the portion of the first surface 121 corresponding to the second sub-segment 12032 and the portion of the first curved surface 101, helping to maintain the shape of the first curved surface 101 at the bonded portion. In some embodiments, the first sub-segment 12031 and the second sub-segment 12032 are respectively bonded between the display portion FF1 and the pad portion FF2; one side surface of the fourth sub-support pad 1204 is bonded to the pad portion FF3, while the other side surface of the fourth sub-support pad 1204 is spaced apart from the display portion FF1.

[0092] Specifically, the fourth sub-support pad 1204 provides flat support and bearing for the driving chip 15. The elastic modulus of the fourth sub-support pad 1204 is relatively large. The other side surface of the fourth sub-support pad 1204 is spaced apart from the display part FF1, that is, the fourth sub-support pad 1204 is suspended close to the surface of the display part FF1. There is no need to set the shape of the fourth sub-support pad 1204 to match the first curved surface 101, which can increase the range of material selection.

[0093] In any of the above display panels, the driver chip 15 is arranged on the side of the pad part FF3 away from the display part FF1. The pad terminal on the pad part FF3 that is bound to the driver chip can be manufactured using the same process as the wiring or electrodes in the display part FF1, which simplifies the manufacturing process.

[0094] Example 4

[0095] This embodiment is the same as or similar to the display panel in any of the above embodiments. This embodiment further introduces the structure of the display panel based on any of the above display panels.

[0096] Please refer to Figures 1 to 3, 10 to 17; Figure 10 is a cross-sectional schematic diagram of a bending portion of a display panel provided in Example 4 of the present application before bending; Figure 11 is a cross-sectional schematic diagram of a display panel provided in Example 4 of the present application after bending; Figure 12 is a schematic diagram of the edge of a bending portion of a display panel provided in Example 4 of the present application; Figure 13 is a three-dimensional schematic diagram of the edge of the bending portion of a display panel provided in Example 4 of the present application after bending; Figure 14 is a cross-sectional schematic diagram of part of the film layer at the dotted line DD position in Figure 13 provided in Example 4 of the present application; Figure 15 is a cross-sectional schematic diagram of part of the film layer at the dotted line BB position in Figure 13 provided in Example 4 of the present application; Figure 16 is a schematic diagram of the stress simulation distribution of the bending portion of the display panel after bending; Figure 17 is a schematic diagram of the distance relationship between the first edge of the display panel and the pad terminal in Example 4 of the present application. The dotted line DD and the dotted line BB are both parallel to the first direction X. The dotted line DD is a cross section at the end of the second edge, and the dotted line BB is a cross section at the center of the second edge. FIG. 13 and FIG. 12 only illustrate the back plate 11 and the display panel body 10 .

[0097] It should be noted that Figure 10 is a schematic cross-sectional view taken along dashed line AA in Figure 1 , and Figure 11 is a schematic cross-sectional view taken along dashed line BB in Figure 13 . Figures 1 , 10 , and 13 also illustrate a first direction X and a second direction Y, with dashed line AA being parallel to the first direction X, and dashed line BB in Figure 13 being parallel to the first direction X.

[0098] In some embodiments, the pad portion FF3 is connected to an arc-shaped side of the display portion FF1, and the display panel 100 also includes a backplane 11; the backplane 11 includes a first backplane 111 and a second backplane 112, the first backplane 111 is attached to the backlight side of the display portion FF1, and the second backplane 112 is attached to the side of the pad portion FF3 close to the display portion FF1; the first backplane 111 includes a first edge 111X close to the bending portion, and the second backplane 112 includes a second edge 112X close to the bending portion FF2; the first edge 111X is straight, and the second edge 112X includes a first sub-segment edge 112X1 corresponding to the middle part of the arc-shaped side of the first arc surface 101, and the distance from the second edge 112X to the first edge 111X has a decreasing trend from the center of the first sub-segment edge 112X1 to both ends of the first sub-segment edge 112X1.

[0099] Specifically, the display portion FF1 is bent at least around the first direction X to form a first arc surface with a first curvature radius, so that the display portion FF1 has a curved side 1001 .

[0100] Specifically, as shown in Figures 10 and 11, the first back panel 111 is attached to the backlight side of the display unit FF1. The backlight side of the display unit FF1 refers to the side where the display unit FF1 does not display an image, or the side opposite to the side where the display unit FF1 displays an image. The backlight side of the display unit FF1 also refers to the back side of the display unit FF1.

[0101] Specifically, as shown in Figure 10, the back panel 11 includes a first back panel 111 and a second back panel 112. The first back panel 111 is attached to the back side of the display part FF1, and the second back panel 112 is attached to the back side of the pad part FF3; as shown in Figure 11, when the bending part FF3 is bent, the first back panel 111 and the second back panel 112 are both located between the display part FF1 and the pad part FF3.

[0102] Specifically, the film layer of the back panel 11 is not set at the corresponding position of the bending portion FF2, and the closest and opposite edges of the first back panel 111 and the second back panel 112 are respectively the first edge 111X and the second edge 112X. After the bending portion FF2 is bent, the starting line of the bending of the bending portion FF2 corresponds to or is the first edge 111X, and the ending line of the bending of the bending portion FF2 corresponds to or is the second edge 112X.

[0103] In this embodiment, specifically, in this application, by setting the first edge 111X to be straight, the second edge 112X corresponds to the middle part of the first arc surface 101 as the first sub-segment edge 112X1, and the distance from the second edge 112X to the first edge 111X has a decreasing trend from the center of the first sub-segment edge 112X1 to the two ends of the first sub-segment edge 112X1, so that when the bending portion FF2 is bent and the pad portion FF2 is bent according to the bent display portion FF1, the bending of the bending portion FF2 is smooth, and the display portion FF1 and the pad portion FF3 are smoothly transitioned to the bending portion FF2 respectively, thereby avoiding interference problems such as wrinkles on the edge of the bending portion FF2, and improving the reliability of the display panel 100.

[0104] In some embodiments, the end of the first back plate 111 close to the bending portion FF2 is the first end 111Y, and the end of the second back plate 112 close to the bending portion FF2 is the second end 112Y. The distance from at least part of the first end 111Y to the edge FF2X of the corresponding bending portion of the display panel is smaller than the distance from the second end 112Y to the edge FF2X of the corresponding bending portion of the display panel.

[0105] Specifically, please refer to Figure 14, which is a cross-section of the dotted line DD in Figure 13. The dotted line DD is a cross-section of the end position of the second edge 112X. Here, in the first direction X, the distance from the first end 111Y to the edge FF2X of the corresponding bending portion of the display panel can be equal to the distance from the second end 112Y to the edge FF2X of the corresponding bending portion of the display panel.

[0106] Specifically, please refer to Figure 15, which is a cross-section of the dotted line BB in Figure 13. The dotted line BB is a cross-section of the center position of the second edge 112X. Here, in the first direction X, the distance from the first end 111Y to the edge FF2X of the corresponding bending portion of the display panel is smaller than the distance from the second end 112Y to the edge FF2X of the corresponding bending portion of the display panel.

[0107] Specifically, comparing Figure 14 and Figure 15, from the end position of the second edge 112X to the center position of the second edge 112X, in the first direction X, the distance from the first end 111Y to the edge FF2X of the corresponding bending portion of the display panel has a tendency to gradually approach relative to the distance from the second end 112Y to the edge FF2X of the corresponding bending portion of the display panel; in other words, from the end position of the second edge 112X to the center position of the second edge 112X, in the first direction X, the distance from the second end 112Y to the edge FF2X of the corresponding bending portion of the display panel has a tendency to gradually move away relative to the distance from the first end 111Y to the edge FF2X of the corresponding bending portion of the display panel.

[0108] Specifically, as shown in Figure 16, Figure 16a shows a schematic diagram of the stress distribution simulation after the display panel is attached to the protective cover glass CG (window, CG, cover glass) through the optical comparison OC, Figure 16b shows the stress distribution after Figure 16a is rotated 90 degrees, Figure 16c shows the stress distribution after Figure 16a is rotated 135 degrees, and Figure 16d shows the stress distribution after Figure 16a is rotated 180 degrees. Figure 16 is a schematic diagram of the stress distribution after the bending portion FF2 is bent. Gray and white in the figure represent the stress distribution, and gray indicates the presence of stress. However, the stress in Figure 16 does not exceed the critical value for cracking, indicating that the bending method of the bending portion FF3 of the present application is feasible. At the same time, in Figure 16, the darker the black / gray color, the greater the stress. The simulation results in Figure 16 show that the stress of the bending portion FF2 is not the largest (the black / gray color of the bending portion FF2 is lighter), and the bending portion FF2 produces stretching and is the part where the deformation is most serious. This shows that the improvement method of the present application can reduce the stress of the bending portion FF2, improve the bending performance of the bending portion FF2 and reduce stress concentration.

[0109] Please refer to Figure 17.

[0110] In some embodiments, the pad portion FF3 includes a plurality of pad terminals FF31, and the plurality of pad terminals FF31 are arranged along an extension direction parallel to the first edge 111X, and the distance from any point on the first edge 111X to the straight line where the plurality of pad terminals FF31 are located is the same; the second edge 112X includes a first point 112XD located at any position of the second edge 112X, and the distance from the first point 112XD to the straight line where the plurality of pad terminals FF31 are located is D, and the stretching rate of the bending portion between the first point and the first edge is a, and D is inversely correlated with a.

[0111] Specifically, D is inversely correlated with a, that is, the greater the stretching rate a of the bending portion between the first point and the first edge, the smaller the distance D from the first point 112XD to the straight line where the multiple pad terminals FF31 are located; the smaller the stretching rate a of the bending portion between the first point and the first edge, the greater the distance D from the first point 112XD to the straight line where the multiple pad terminals FF31 are located.

[0112] Specifically, the pad portion FF3 includes a plurality of pad terminals FF31, and the plurality of pad terminals FF31 are arranged along an extension direction parallel to the first edge 111X, and the distances from the first edge 111X to the straight line where the plurality of pad terminals FF31 are located are the same; before the bending portion FF2 is bent, the distance from the first edge 111X to the straight line where the plurality of pad terminals FF31 are located is L, and the second edge 112X includes a first point 112XD located at any position of the second edge 112X, and the distance from the first point 112XD to the straight line where the plurality of pad terminals FF31 are located is D; after the bending portion FF2 is bent, the elongation rate of the corresponding bending portion FF2 between the first edge 111X and the first point 112XD is a, and the display panel satisfies the following formula: L≥D+(LD)*a.

[0113] In some embodiments, as shown in FIG1 , the portions of the display portion FF1 located on both sides of the first arc surface 101 are respectively bent into a second arc surface 102 and a third arc surface 103 , and the second arc surface 102 and the third arc surface 103 have a second curvature radius, and the first curvature radius is greater than the second curvature radius.

[0114] Specifically, the second curved surface 102 , the first curved surface 101 and the third curved surface 103 are sequentially arranged in the second direction Y, and the first curvature radius is greater than the curvature radius, so that the display panel 100 has a beautiful appearance.

[0115] In some embodiments, the second edge 112X includes a second sub-segment edge 112X2 located on one side of the first sub-segment edge 112X1, and a third sub-segment edge 112X3 located on the other side of the first sub-segment edge 112X1; the second sub-segment edge 112X2 at least corresponds to the second arc surface 102, and the third sub-segment edge 112X3 at least corresponds to the third arc surface 103.

[0116] Specifically, the second sub-segment edge 112X2 at least corresponds to the second arc surface 102, the third sub-segment edge 112X3 at least corresponds to the third arc surface 103, and the first sub-segment edge 112X1 at least corresponds to the middle part of the first arc surface 101, so that each part of the bending portion FF2 can be bent smoothly.

[0117] It should be noted that the smooth bending of the bending portion FF2 means that no interference problems such as wrinkles will occur at the edge of the bending portion FF2 in the second direction Y, and that the bending portion FF2 bends smoothly or smoothly in the first direction X, as shown in Figure 2. Figure 2 also illustrates the bending cross-section of the FF3Z portion. Preferably, the bending portion FF2 bends into a part of a circle in the first direction X, thereby improving the reliability of the display panel.

[0118] Example 5

[0119] This embodiment is the same as or similar to the display panel in any of the above embodiments. This embodiment further introduces the structure of the display panel based on any of the above display panels.

[0120] Please refer to FIG. 18 , which is a schematic diagram of the dispensing positions of the protective adhesive line of a display panel provided in the fifth embodiment of the present application.

[0121] In some embodiments, the display panel 100 also includes a protective glue line 130, which includes a first sub-protective glue line 1301 and a second sub-protective glue line 1302. The first sub-protective glue line 1301 is set corresponding to the first edge 111X, and the second sub-protective glue line 1302 is set corresponding to the second edge 112X. The extension direction of the first sub-protective glue line 1301 and the extension direction of the second sub-protective glue line 1302 are respectively the same as the extension direction of the first edge 111X and the extension direction of the second edge 112X.

[0122] Specifically, the protective rubber line 130 serves to fix the bending shapes of the first edge 111X and the second edge 112X of the bending portion FF2.

[0123] In some embodiments, the first sub-protective rubber line 1301 is set on the first edge 111X, and the second sub-protective rubber line 1302 is set on the second edge 112X; or the first sub-protective rubber line 1301 is set on the side of the display panel body 10 away from the first edge 111X, and the second sub-protective rubber line 1302 is set on the side of the display panel body 10 away from the second edge 112X.

[0124] Specifically, the orthographic projection of the first sub-protective glue line 1301 on the display panel body 10 covers the orthographic projection of the first edge 111X on the display panel body 10, and the orthographic projection of the second sub-protective glue line 1302 on the display panel body 10 covers the orthographic projection of the second edge 112X on the display panel body 10.

[0125] Specifically, although Figure 18 shows that the first sub-protective rubber line 1301 is set on the first edge 111X and the second sub-protective rubber line 1302 is set on the second edge 112X; it is easy to understand that the first sub-protective rubber line 1301 can also be set on the side of the display panel body 10 away from the first edge 111X, and the second sub-protective rubber line 1302 can also be set on the side of the display panel body 10 away from the second edge 112X.

[0126] It should be noted that in any of the above embodiments, as shown in Figures 4, 6, 8, and 11, a composite support layer may be further provided between the first backplane 111 and the second backplane 112. The composite support layer may include at least one of foam 50, double-sided tape 72, a rigid support layer, a heat dissipation layer, etc. The display panel may further include an optical adhesive layer 13 provided on a side of the display portion FF1 away from the pad portion, and a cover layer 14.

[0127] The above is a detailed introduction to a display panel provided in an embodiment of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A display panel, wherein: include: The display panel body comprises a display portion, a bending portion and a pad portion connected in sequence, wherein the pad portion is arranged on a backlight side of the display portion, the bending portion is extensible, and the display portion is bent at least around a first direction into a first arc shape having a first curvature radius; A driving chip, bound and arranged on the pad portion; A support pad is arranged between the display part and the pad part, and the support pad is arranged at least corresponding to the driving chip. The support pad includes a first surface facing the display part and a second surface facing the pad part. The first surface is in contact with the first arc surface, and the second surface is a flat surface.

2. The display panel according to claim 1, wherein: The pad portion is connected to an arc-shaped side of the display portion, and the display panel further includes: A backplane, comprising a first backplane and a second backplane, wherein the first backplane is attached to a backlight side of the display portion, and the second backplane is attached to a side of the pad portion close to the display portion; The first back plate includes a first edge close to the bending portion, and the second back plate includes a second edge close to the bending portion; The first edge is straight, the second edge includes a first sub-segment edge corresponding to the middle part of the arc-shaped side of the first arc surface, and the distance from the second edge to the first edge tends to decrease from the center of the first sub-segment edge to both ends of the first sub-segment edge.

3. The display panel according to claim 2, wherein: Portions of the display portion located on both sides of the first arc surface are respectively bent into a second arc surface and a third arc surface. The second arc surface and the third arc surface have a second curvature radius, and the first curvature radius is greater than the second curvature radius.

4. The display panel according to claim 3, wherein: The second edge includes a second sub-segment edge located on one side of the first sub-segment edge, and a third sub-segment edge located on the other side of the first sub-segment edge; The edge of the second sub-segment at least corresponds to the second arc surface shape, and the edge of the third sub-segment at least corresponds to the third arc surface shape.

5. The display panel according to claim 2, wherein: Also includes: The protective rubber line includes a first sub-protective rubber line and a second sub-protective rubber line. The first sub-protective rubber line is set corresponding to the first edge, and the second sub-protective rubber line is set corresponding to the second edge. The extension direction of the first sub-protective rubber line and the extension direction of the second sub-protective rubber line are respectively the same as the extension direction of the first edge and the extension direction of the second edge.

6. The display panel according to claim 5, wherein: Also includes: The first sub-protective adhesive line is arranged on the first edge, and the second sub-protective adhesive line is arranged on the second edge; or The first sub-protective adhesive line is disposed on a side of the display panel body away from the first edge, and the second sub-protective adhesive line is disposed on a side of the display panel body away from the second edge.

7. The display panel according to claim 2, wherein: The end of the first back plate close to the bending portion is a first end, and the end of the second back plate close to the bending portion is a second end. The distance from at least part of the first end to the edge of the display panel corresponding to the bending portion is smaller than the distance from the second end to the edge of the display panel corresponding to the bending portion.

8. The display panel according to claim 2, wherein: The pad portion includes a plurality of pad terminals, the plurality of pad terminals are arranged along an extension direction parallel to the first edge, and the distance from any point on the first edge to a straight line where the plurality of pad terminals are located is the same; The second edge includes a first point located at any position of the second edge, the distance from the first point to the straight line where the plurality of pad terminals are located is D, the stretching rate of the bending portion between the first point and the first edge is a, and D is inversely correlated with a.

9. The display panel according to claim 1, wherein: In the second direction, the width of the pad portion is smaller than the width of the display portion; In the second direction, the width of the support pad is greater than or equal to the width of the pad portion, and the first direction is perpendicular to the second direction; The first surface has the same curvature as the first arc-shaped surface.

10. The display panel according to claim 9, wherein: The support pad comprises a first sub-support pad and a second sub-support pad, the first sub-support pad and the second sub-support pad are stacked, the width of the first sub-support pad in the second direction is greater than the width of the second sub-support pad in the second direction, the elastic modulus of the first sub-support pad is less than the elastic modulus of the second sub-support pad, the first sub-support pad comprises a groove on a side surface close to the pad portion, the second sub-support pad is accommodated in the groove, and the orthographic projection of the second sub-support pad on the pad portion covers the orthographic projection of the driver chip on the pad portion; A surface of the first sub-support pad close to the pad portion and a surface of the second sub-support pad close to the pad portion are in the same plane.

11. The display panel according to claim 10, wherein: The material of the first sub-support pad includes acrylic resin, and the material of the second sub-support pad includes stainless steel.

12. The display panel according to claim 9, wherein: The support pad includes a third sub-support pad and a fourth sub-support pad, the third sub-support pad includes a first sub-segment and a second sub-segment that are spaced apart, the fourth sub-support pad is disposed between the first sub-segment and the second sub-segment along the second direction, the elastic modulus of the third sub-support pad is smaller than the elastic modulus of the fourth sub-support pad, and the orthographic projection of the fourth sub-support pad on the pad portion covers the orthographic projection of the driver chip on the pad portion; The first surface portion corresponding to the first sub-segment has the same curvature as the first arc-shaped portion corresponding to the bonding, and the first surface portion corresponding to the second sub-segment has the same curvature as the first arc-shaped portion corresponding to the bonding.

13. The display panel according to claim 12, wherein: The first sub-segment and the second sub-segment are respectively attached between the display portion and the pad portion; one side surface of the fourth sub-support pad is attached to the pad portion, and the other side surface of the fourth sub-support pad is spaced apart from the display portion.

14. The display panel according to claim 9, wherein: The driving chip is arranged on a side of the pad portion away from the display portion.

15. The display panel according to claim 10, wherein: The driving chip is arranged on a side of the pad portion away from the display portion.

16. The display panel according to claim 11, wherein: The driving chip is arranged on a side of the pad portion away from the display portion.

17. The display panel according to claim 12, wherein: The driving chip is arranged on a side of the pad portion away from the display portion.

18. The display panel according to claim 13, wherein: The driving chip is arranged on a side of the pad portion away from the display portion.

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