阅读说明：本技术 显示面板 (Display panel ) 是由 张允题 于 2021-01-06 设计创作，主要内容包括：本申请提供一种显示面板,在本显示面板中,弯折部分包括第一区块和第二区块,第二区块位于第一区块靠近显示部分的一侧；第一区块受到的弯折应力包括第一应力,第二区块受到的弯折应力包括第二应力,第一应力大于第二应力；金属走线包括第一非开孔段和第一开孔段,第一开孔段上设置有至少一个开孔,第一非开孔段与第一开孔段相连,第一非开孔段位于第一区块,第一开孔段位于第二区块。本申请在弯折部分的第一区块设置第一非开孔段,以避免金属走线断裂；在第二区块设置第一开孔段,以减低整根金属走线的硬度,减低其回弹力,改善膜层分离的问题。(The application provides a display panel, in the display panel, a bending part comprises a first block and a second block, and the second block is positioned on one side of the first block close to the display part; the bending stress borne by the first block comprises a first stress, the bending stress borne by the second block comprises a second stress, and the first stress is greater than the second stress; the metal wiring comprises a first non-perforated section and a first perforated section, at least one opening is arranged on the first perforated section, the first non-perforated section is connected with the first perforated section, the first non-perforated section is located in the first block, and the first perforated section is located in the second block. The first non-perforated section is arranged in the first block of the bending part so as to avoid the metal routing from being broken; the second block is provided with a first open hole section to reduce the hardness of the whole metal wiring, reduce the resilience force and improve the problem of film separation.)

1. A display panel comprises a display part, a bending part and a binding part, wherein the bending part is connected between the display part and the binding part, the binding part is arranged on the back side of the display part through the bending part, the bending part comprises a first substrate and a metal wire, the metal wire is arranged on the first substrate, one end of the metal wire is connected to the display part, and the other end of the metal wire is connected to the binding part, and the display panel is characterized in that:

the bending part comprises a first block and a second block, and the second block is positioned on one side of the first block close to the display part; the bending stress borne by the first block comprises a first stress, the bending stress borne by the second block comprises a second stress, and the first stress is greater than the second stress;

the metal routing wire comprises a first non-perforated section and a first perforated section, at least one opening is arranged on the first perforated section, the first non-perforated section is connected with the first perforated section, the first non-perforated section is located in the first block, and the first perforated section is located in the second block.

2. The display panel according to claim 1, wherein in the first opening section, the size of the opening is gradually decreased in a direction from the second block to the first block.

3. The display panel of claim 2, wherein the first aperture segment comprises a first sub-segment, the first sub-segment being connected to the first non-aperture segment;

the size of the opening on the first subsection decreases in the direction from the second block to the first block.

4. The display panel of claim 3, wherein the aperture comprises a major axis and a minor axis; in the first subsection, in the direction from the second block to the first block, the long axis of the opening is decreased progressively according to a first rule, and/or the short axis of the opening is decreased progressively according to a second rule;

in two adjacent openings, the opening close to the first block is set as a first opening, and the other opening is set as a second opening;

the first rule is: the length of the long axis of the first opening is equal to a first set multiple of the length of the long axis of the second opening, or the length of the long axis of the first opening is equal to the length of the long axis of the second opening minus a first set length;

the second rule is: the minor axis length of the first aperture is equal to a second set multiple of the minor axis length of the second aperture, or the minor axis length of the first aperture is equal to the minor axis length of the second aperture minus a second set length.

5. The display panel according to claim 4, wherein an extending direction of the short axis is parallel to a bending direction of the bent portion, and a length of the short axis is smaller than a length of the long axis.

6. The display panel according to claim 3, wherein the display portion further comprises a second substrate and a first back plate, the first back plate being provided on a back surface of the second substrate; the bending part comprises a third block, one end of the third block is connected with the display part, the other end of the third block is connected with the second block, the bending stress applied to the third block comprises a third stress, and the third stress is greater than the second stress;

the metal routing wire comprises a second non-perforated section, one end of the second non-perforated section is connected with the first perforated section, the other end of the second non-perforated section is connected with the display part, and the second non-perforated section is located in the third block.

7. The display panel of claim 6, wherein the first open segment further comprises a second sub-segment, one end of the second sub-segment is connected to the first sub-segment, and the other end of the second sub-segment is connected to the second non-open segment;

the size of the opening on the second subsection decreases in the direction from the second block to the third block.

8. The display panel according to claim 7, wherein in the second sub-section, a long axis of the opening decreases according to a third rule and/or a short axis of the opening decreases according to a fourth rule in a direction from the second block to the third block.

9. The display panel of claim 6, wherein the first stress is greater than the third stress, wherein the length of the second non-perforated segment is less than or equal to the length of the first non-perforated segment, and wherein the length of the first perforated segment is greater than the length of the second non-perforated segment.

10. The display panel according to claim 1, wherein the shape of the opening has a major axis and a minor axis, the major axis extends in a direction perpendicular to the minor axis, and the minor axis extends in a direction parallel to the width direction of the metal traces.

Technical Field

The present disclosure relates to display technologies, and particularly to a display panel.

Background

In the terminal bending process of the conventional OLED display screen product, after the terminal of the OLED display panel is bent, the metal wiring in the bending area is subjected to a large bending stress, so that stress concentration is easy to generate and the metal wiring is easy to break; simultaneously, the terminal back of buckling, the district of buckling still can produce the resilience force, easily takes place the separation of rete, leads to backplate and terminal district gasket or panel and backplate separation. In addition, the terminal bending back panel can produce mutual extrusion with the backplate at the endpoint of backplate, the endpoint of buckling promptly, and this place also can form stress concentration, easily leads to metal routing fracture.

In addition, the metal of trompil type is walked and is compared with the metal of not trompil type, because the trompil design, trompil type metal is walked and is walked softer than the metal of not trompil type, therefore the terminal resilience force after buckling is little, is difficult for taking place the rete separation. However, the open-cell metal trace is prone to stress concentration at the edge of the hole parallel to the bending direction, which results in the metal trace breaking.

Disclosure of Invention

The embodiment of the application provides a display panel to solve current display panel and buckle back trompil type metal and walk the line and easily produce stress concentration at the hole edge at the terminal, lead to the cracked technical problem of metal wiring.

The embodiment of the application provides a display panel, which comprises a display part, a bending part and a binding part, wherein the bending part is connected between the display part and the binding part, the binding part is arranged on the back side of the display part through the bending part, the bending part comprises a first substrate and a metal wire, the metal wire is arranged on the first substrate, one end of the metal wire is connected to the display part, and the other end of the metal wire is connected to the binding part;

the bending part comprises a first block and a second block, and the second block is positioned on one side of the first block close to the display part; the bending stress borne by the first block comprises a first stress, the bending stress borne by the second block comprises a second stress, and the first stress is greater than the second stress;

the metal routing wire comprises a first non-perforated section and a first perforated section, at least one opening is arranged on the first perforated section, the first non-perforated section is connected with the first perforated section, the first non-perforated section is located in the first block, and the first perforated section is located in the second block.

In the display panel according to the embodiment of the present application, in the first opening section, at least a portion of the openings in the direction from the second block to the first block have a decreasing size.

In the display panel according to the embodiment of the present application, the first opening section includes a first sub-section, and the first sub-section is connected to the first non-opening section;

the size of the opening on the first subsection decreases in the direction from the second block to the first block.

In the display panel according to the embodiment of the present application, the opening includes a long axis and a short axis; in the first subsection, the long axis of the opening is decreased gradually according to a first rule in the direction from the second block to the first block, and/or the short axis of the opening is decreased gradually according to a second rule.

In the display panel according to the embodiment of the present application, in two adjacent openings, the opening close to the first block is set as a first opening, and the other opening is set as a second opening;

the first rule is: the length of the long axis of the first opening is equal to a first set multiple of the length of the long axis of the second opening, or the length of the long axis of the first opening is equal to the length of the long axis of the second opening minus a first set length;

the second rule is: the minor axis length of the first aperture is equal to a second set multiple of the minor axis length of the second aperture, or the minor axis length of the first aperture is equal to the minor axis length of the second aperture minus a second set length.

In the display panel according to the embodiment of the present application, an extending direction of the short axis is parallel to a bending direction of the bending portion, and a length of the short axis is smaller than a length of the long axis.

In the display panel according to the embodiment of the present application, the display portion further includes a second substrate and a first backplane, and the first backplane is disposed on a back surface of the second substrate; the bending part comprises a third block, one end of the third block is connected with the display part, the other end of the third block is connected with the second block, the bending stress applied to the third block comprises a third stress, and the third stress is greater than the second stress;

the metal routing wire comprises a second non-perforated section, one end of the second non-perforated section is connected with the first perforated section, the other end of the second non-perforated section is connected with the display part, and the second non-perforated section is located in the third block.

In the display panel according to the embodiment of the present application, the first open-hole segment further includes a second sub-segment, one end of the second sub-segment is connected to the first sub-segment, and the other end of the second sub-segment is connected to the second non-open-hole segment;

the size of the opening on the second subsection decreases in the direction from the second block to the third block.

In the display panel according to the embodiment of the present application, in the second sub-section, in a direction from the second block to the third block, a long axis of the opening decreases according to a third rule, and/or a short axis of the opening decreases according to a fourth rule.

In the display panel according to the embodiment of the present application, the first stress is greater than the third stress, the length of the second non-perforated section is less than or equal to the length of the first non-perforated section, and the length of the first perforated section is greater than the length of the second non-perforated section.

In the display panel according to the embodiment of the present application, the shape of the opening has a long axis and a short axis, an extending direction of the long axis is perpendicular to an extending direction of the short axis, and the extending direction of the short axis is parallel to a width direction of the metal trace.

According to the display panel, the first non-perforated section is arranged on the first block of the bent part so as to avoid the metal routing from being broken; the second block is provided with a first open hole section to reduce the hardness of the whole metal wiring, reduce the resilience force and improve the problem of film separation.

Drawings

In order to more clearly illustrate the embodiments of the present application, the drawings used in the embodiments will be briefly described below. The drawings in the following description are only some embodiments of the present application, and it will be obvious to those skilled in the art that other drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a display panel in a bent state according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a display panel in a flat state according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure with metal traces in a flat state;

fig. 4 is a schematic partial structure diagram of a metal trace of a display panel according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of another part of metal traces of the display panel according to the embodiment of the present application;

fig. 6 is an enlarged view of a portion a in fig. 3.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "above" the second feature may comprise the first and second features being in direct contact, or the first and second features being not in direct contact but in contact with each other through another feature therebetween. Also, the first feature being "on," "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a display panel in a bent state according to an embodiment of the present disclosure; fig. 2 is a schematic structural diagram of a display panel in a flat state according to an embodiment of the present application.

The embodiment of the present application provides a display panel 1000, which includes a display portion 100, a bending portion 200, and a binding portion 300. The bending part 200 is connected between the display part 100 and the binding part 300. The binding portion 300 is provided to the rear surface side of the display portion 100 through the bending portion 200.

Note that the display surface is the front surface of the display portion 100, and the surface of the display portion 100 opposite to the display surface is the back surface of the display portion 100. For example, when the display surface faces the user, the back surface of the display portion 100 faces away from the user.

The display panel 1000 includes a substrate 11. The substrate 11 includes a first substrate 111 corresponding to the bending portion 200, a second substrate 112 corresponding to the display portion 100, and a third substrate 113 corresponding to the binding portion 300. In the present embodiment, the first substrate 111, the second substrate 112, and the third substrate 113 are integrally formed of the same material. In some embodiments, the materials of the first substrate 111, the second substrate 112, and the third substrate 113 may also be different.

The display portion 100 includes a second substrate 112, an OLED device layer 13, and a first rear plate 14. The OLED device layer 13 is disposed on the second substrate 112. The first backplane 14 is disposed on the back side of the second substrate 112, that is, the first backplane 14 is disposed on the side of the second substrate 112 facing away from the OLED device layer 13.

The binding portion 300 includes a third substrate 113, binding terminals 15, and a second back plate 16, the binding terminals 15 being disposed on the third substrate 113. The second back plate 16 is disposed on a side of the third substrate 113 facing away from the binding terminals 15.

The bending portion 200 includes a first substrate 111 and a metal trace 12, and the metal trace 12 is disposed on the first substrate 111. One end of the metal trace 12 is connected to the display portion 100, and the other end of the metal trace 12 is connected to the binding portion 300.

The bending part 200 includes a first block B1, a second block B2, a third block B3, a fourth block B4, and a fifth block B5. The third B3, the second B2, the first B1, the fourth B4 and the fifth B5 are sequentially connected to the end of the display portion 100 toward the bending portion 200, and the fifth B5 is connected to the binding portion 300.

Specifically, the second section B2 is located on a side of the first section B1 close to the display portion 100. One end of the third block B3 is connected to the display part 100, and the other end of the third block B3 is connected to the second block B2. The second block B2 is connected to the first block B1.

The bending stress experienced by the first block B1 includes a first stress, the bending stress experienced by the second block B2 includes a second stress, and the bending stress experienced by the third block B3 includes a third stress. The bending stress experienced by the fourth block B4 includes a fourth stress, and the bending stress experienced by the fifth block B5 includes a fifth stress.

The first stress is greater than the second stress. The third stress is greater than the second stress. The first stress is greater than the fourth stress. The fifth stress is greater than the fourth stress.

Wherein, the bending stress of the first block B1 is the average stress of the sum of the bending stresses of each point of the first block B1; the bending stress of the second block B2 is also the average stress of the sum of the bending stresses of each point of the second block B2; the bending stress applied to the third block B3 is the average stress of the sum of the bending stresses applied to each point of the third block B3; the bending stress of the fourth block B4 is the average stress of the sum of the bending stresses of each point of the fourth block B4; the bending stress experienced by the fifth block B5 is also the average stress of the sum of the bending stresses experienced by each point of the fifth block B5.

In addition, the first stress, the second stress, the third stress, the fourth stress and the fifth stress are the same type of stress, for example, tensile stress or compressive stress, and the present embodiment is described by taking tensile stress as an example, that is, the first stress, the second stress, the third stress, the fourth stress and the fifth stress are all tensile stress, but not limited thereto.

Referring to fig. 3, the metal trace 12 includes a first non-via segment S1, a first via segment L1, a second non-via segment S2, a second via segment L2, and a third non-via segment S3. The first non-perforated section S1, the first perforated section L1, the second non-perforated section S2, the second perforated section L2 and the third non-perforated section S3 are sequentially connected to an end of the display portion 100 facing the bending portion 200, and the third non-perforated section S3 is connected to the binding portion 300.

Specifically, the first non-opening section S1 is located in the first block B1. The first perforated section L1 is located at the second block B2. The second non-perforated section S2 is located at the third block B3. The second open section L2 is located at the fourth block B4. The third non-perforated section S3 is located in the fifth block B5.

The first and second perforated sections L1 and L2 are provided with at least one opening 121. The first, second and third non-vented sections S1, S2 and S3 are not vented.

The first non-perforated section S1 is connected to the first perforated section L1. One end of the second non-opening section S2 is connected to the first opening section L1, and the other end of the second non-opening section S2 is connected to the display portion 100.

In the display panel 1000 of the embodiment, no opening is formed on the metal traces 12 of the first block B1, the third block B3 and the fifth block B5 of the bending portion 200 to prevent the metal traces 12 of the first block B1, the third block B3 and the fifth block B5 from being broken. Openings are formed in the metal traces 12 of the second block B2 and the fourth block B4 to reduce the hardness of the entire metal trace 12, reduce the resilience thereof, and improve the problem of film separation.

Specifically, referring to fig. 4, in the display panel 1000 of the present embodiment, in the first opening section L1, the size of the opening 121 decreases in a direction from the second block B2 to the first block B1.

Specifically, in the display panel 1000 of the present embodiment, the first open segment L1 includes a first sub-segment L11 and a second sub-segment L12. The first subsection L11 is connected to the first non-vented section S1. One end of the second sub-section L12 is connected to the first sub-section L11 and the other end of the second sub-section L12 is connected to the second non-vented section S2.

The size of the openings 121 on the first segment L11 decreases from the second block B2 to the first block B1. The size of the openings 121 on the second segment L12 decreases from the second section B2 to the third section B3.

Since the compressive stress applied to the first sub-segment L11 increases in a direction from the second block B2 to the first block B1, the decreasing size of the openings 121 on the first sub-segment L11 can effectively reduce the risk of film separation and ensure that the metal trace 12 has a suitable hardness.

Since the compressive stress applied to the second sub-segment L12 increases in a direction from the second block B2 to the third block B3, the decreasing size of the openings 121 on the second sub-segment L12 can effectively reduce the risk of film separation and ensure that the metal trace 12 has proper hardness. In summary, the minimum stress of the first open-hole section L1 is the boundary between the first subsection L11 and the second subsection L12. From the juncture of the first open-hole section L1, in the directions of the two ends of the first open-hole section L1, the stress applied to the first open-hole section L1 increases progressively, and the size of the open-hole 121 on the first open-hole section L1 decreases progressively, so as to effectively reduce the risk of film separation and ensure that the metal trace 12 has proper hardness.

Referring to fig. 5, in the second opening section L2, the size of the opening 121 decreases from the fourth block B4 to the first block B1.

In particular, the second open section L2 includes a third subsection L21 and a fourth subsection L22. The third subsection L21 is connected to the first non-vented section S1. One end of the fourth subsection L22 is connected to the third subsection L21 and the other end of the fourth subsection L22 is connected to the fourth non-vented section S4.

The size of the opening 121 on the second opening section L2 decreases from the fourth block B4 to the first block B1.

The size of the openings 121 in the fourth segment L22 decreases from the fourth segment B4 to the fifth segment B5.

Since the compressive stress applied to the second open-hole section L2 increases from the fourth block B4 to the first block B1, the decreasing size of the open-hole 121 on the second open-hole section L2 can effectively reduce the risk of film separation and ensure that the metal trace 12 has proper hardness.

Since the compressive stress applied to the fourth sub-segment L22 increases from the fourth block B4 to the fifth block B5, the decreasing size of the openings 121 of the fourth sub-segment L22 can effectively reduce the risk of film separation and ensure that the metal trace 12 has proper hardness.

In summary, the minimum stress of the second perforated section L2 is the boundary between the third subsection L21 and the fourth subsection L22. From the juncture of the second open-hole section L2 to the two end directions of the second open-hole section L2, respectively, the stress borne by the second open-hole section L2 increases progressively, and the size of the open-hole 121 on the second open-hole section L2 decreases progressively, so as to effectively reduce the risk of film separation and ensure that the metal trace 12 has proper hardness.

In the present embodiment, the first opening section L1 and the second opening section L2 share one opening 121 at the position where the force is the smallest.

In the display panel 1000 of the present embodiment, the size of the opening 121 may be a major axis, a minor axis, a radius, a major width, a diagonal length, or the like. That is, the shape of the plurality of openings 121 may be selected from one of an ellipse, a diamond, a parallelogram, a circle, a rectangle, a regular polygon, a triangle, a trapezoid, and any combination thereof.

In the display panel 1000 of the present embodiment, the shape of the opening 121 is an ellipse. Referring to fig. 6, the opening 121 includes a major axis f and a minor axis e. The extending direction of the short axis e is parallel to the width direction of the metal trace 12, and the extending direction of the long axis f is perpendicular to the extending direction of the short axis e. In this embodiment, the oval opening 121 is adopted, so that on one hand, the two side edges of the metal trace 12 are prevented from being too narrow in the line width direction, and the risk of breaking the metal trace 12 is reduced; on the other hand, the aperture ratio of the metal trace 12 can be increased, and the hardness of the metal trace 12 can be reduced.

Referring to fig. 6, in the first segment L11, the major axis f of the opening 121 decreases according to a first rule and/or the minor axis e of the opening 121 decreases according to a second rule in the direction from the second block B2 to the first block B1.

In the second segment L12, the major axis f of the opening 121 decreases according to a third rule and/or the minor axis e of the opening 121 decreases according to a fourth rule in the direction from the second block B2 to the third block B3.

Specifically, in two adjacent openings 121, the opening 121 close to the first block B1 is set as a first opening, and the other opening 121 is set as a second opening.

The first rule is: the length of the long axis of the first opening is equal to a first set multiple of the length of the long axis of the second opening, or the length of the long axis f of the first opening is equal to the length of the long axis f of the second opening minus the first set length.

The second rule is: the minor axis e length of the first aperture is equal to a second set multiple of the minor axis e length of the second aperture, or the minor axis e length of the first aperture is equal to the minor axis e length of the second aperture minus a second set length.

The third rule is: the length of the long shaft f of the first opening is equal to a third set multiple of the length of the long shaft f of the second opening, or the length of the long shaft f of the first opening is equal to the length of the long shaft f of the second opening minus a third set length.

The fourth rule is: the minor axis e length of the first aperture is equal to a fourth set multiple of the minor axis e length of the second aperture, or the minor axis e length of the first aperture is equal to the minor axis e length of the second aperture minus a fourth set length.

In this embodiment, a first rule is that the length of the long axis f of the first opening is equal to a first set multiple of the length of the long axis f of the second opening; the second rule is that the minor axis e length of the first aperture is equal to a second set multiple of the minor axis e length of the second aperture; the length of the long shaft f of the first opening is equal to a third set multiple of the length of the long shaft f of the second opening; the fourth rule is to illustrate that the length of the minor axis e of the first hole is equal to a fourth set multiple of the length of the minor axis e of the second hole, but the invention is not limited thereto.

Specifically, the first and third set of multiples are each in a range between 0.6 and 0.95, including 0.6 and 0.95. The second and fourth set multiples are each in a range between 0.6 and 0.95, including 0.6 and 0.95.

Alternatively, the first set multiple and the third set multiple may be 0.7, 0.8, or 0.9, respectively; the second set multiple and the fourth set multiple may be 0.7, 0.8, or 0.9, respectively.

The larger the first, second, third and fourth setting multiples are, the gentler the decreasing trend of the opening 121 is, and the lower the hardness and resilience of the metal trace 12 are. Optionally, the first, second, third and fourth setting multiples are equal, and the four are equal to 0.9.

In some embodiments, the first, second, third and fourth setting multiples may not be equal.

In some embodiments, two adjacent first setting factors on the first segment L11 decrease in a direction from the second block B2 to the first block B1.

In the display panel 1000 of the present embodiment, the extending direction of the short axis e is parallel to the bending direction of the bending portion 200, and the length of the short axis e is smaller than that of the long axis f. Since the metal trace 12 is stressed most parallel to the bending direction, the stress concentration phenomenon can be reduced by setting the length of the short axis e to be smaller than the length of the long axis f.

In the first opening section L1 and the second opening section L2, the distance between any two adjacent openings 121 is a set distance h, and in this embodiment, the set distance is between 2 micrometers and 6 micrometers, including 2 micrometers and 6 micrometers. An optional set pitch h is 4 microns.

In the display panel 1000 of the present embodiment, the metal trace 12 is formed by a Ti/Al/Ti three-layer metal film layer, the thicknesses of which are 0.05, 0.6, and 0.08 micrometers, respectively, and the total thickness of which is 0.73 um. The thickness of each layer of the metal trace 12 is not limited to the above values, and can be adjusted according to actual requirements. The metal trace 12 is prepared by forming Ti, Al, and Ti films by PVD (physical vapor deposition), and then forming the opening 121 by exposure, development, and etching processes using a mask process.

In some embodiments, the metal trace 12 can also be a single-layer or double-layer metal film structure, such as Cu, Al, Ag, Mo/Cu.

The line width of the single metal trace 12 is between 8 microns and 12 microns, including 8 microns and 12 microns, and optionally, the line width of the metal trace 12 is 10 microns.

In the direction of the short axis e, the distance from the opening 121 to the boundary of the metal trace 12 is equal to 0.2 to 0.6 times the line width of the metal trace 12, so as to avoid the edge of the metal trace 12 being too narrow and reduce the risk of breaking the metal trace 12.

Alternatively, the maximum dimension of the opening 121 is 7.5 micrometers for the short axis e and 8.5 micrometers for the long axis f.

In the display panel 1000 of the embodiment, the first stress is greater than the third stress, the length of the second non-perforated segment S2 is less than or equal to the length of the first non-perforated segment S1, and the length of the first perforated segment L1 is greater than the length of the second non-perforated segment S2. This is provided to reduce the risk of breaking the metal trace 12.

In the display panel 1000 of the present embodiment, the shape of the opening on the second opening segment L2 is the same as or different from the shape of the first opening segment L1. The gradation rule of the sizes of the openings 121 on the second opening section L2 is the same as or different from the gradation rule of the sizes of the openings 121 on the first opening section L1.

In the display panel 1000 of the embodiment, the first block B1 has the maximum stress, and the maximum stress decreases in the direction of the two ends of the first block B1.

For example, referring to fig. 1, when the bending portion 200 is arc-shaped, the maximum stress of the first block B1 is located in the middle of the first block B1, i.e., the 1/2 arc, and decreases gradually toward the two ends; the second block B2 and the fourth block B4 are respectively positioned at the 1/4 arc and the 3/4 arc in sequence at the positions where the stress is the smallest.

In addition, it should be noted that, during the bending process of the bending portion 200, due to the mutual pressing action between the end of the third block B3 and the end point of the first back plate 14, the compressive stress applied to the third block B3 is increased, and also due to the pressing action, the tensile stress applied to the third block B3 is correspondingly increased; similarly, the fifth block B5 is pressed against the end of the second back plate 16, resulting in an increase in the compressive and tensile stresses experienced by the fifth block B5.

Optionally, the length of the first block B1, the length of the third block B3 and the length of the fifth block B3 are equal; or the first block B1 is longer than the fifth block B5, and the third block B3 is equal to the fifth block B5.

Optionally, the lengths of the first, third and fifth blocks B1, B3, B5 are between 100 and 220 microns, including 100 and 220 microns, respectively. This arrangement is to avoid the film layers separating due to the large resilience.

In the present embodiment, the lengths of the first, third and fifth blocks B1, B3 and B5 are all 160 μm.

In addition, in the display panel 1000 of the embodiment, the first stress, the third stress and the fifth stress are all greater than or equal to 6.505e-02 megapascals (MPa), and optionally, the first stress is greater than or equal to 1.147e-01 megapascals (MPa).

In the display panel 1000 of the present embodiment, no opening is disposed on the metal traces 12 of the first block B1, the third block B3 and the fifth block B5 of the bending portion 200 to prevent the metal traces 12 from being broken; the openings 121 are disposed on the metal traces 12 of the second block B2 and the fourth block B4 to reduce the hardness of the entire metal trace 12, reduce the resilience thereof, and improve the problem of film separation.

The display panel provided by the embodiment of the present application is described in detail above, and a specific example is applied to illustrate the principle and the implementation manner of the present application, and the description of the embodiment is only used to help understanding the technical solution and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.