CN112750805B - Display panel - Google Patents

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Publication number
CN112750805B
CN112750805B CN202110011342.3A CN202110011342A CN112750805B CN 112750805 B CN112750805 B CN 112750805B CN 202110011342 A CN202110011342 A CN 202110011342A CN 112750805 B CN112750805 B CN 112750805B
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block
section
stress
length
opening
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CN112750805A (en
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张允题
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/562—Protection against mechanical damage
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
    • H01L23/50—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor for integrated circuit devices, e.g. power bus, number of leads
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/549—Organic PV cells

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

In the display panel, a bending part comprises a first block and a second block, wherein the second block is positioned at one side of the first block close to a display part; the bending stress born by the first block comprises a first stress, the bending stress born by the second block comprises a second stress, and the first stress is larger than the second stress; the metal wire comprises a first non-perforated section and a first perforated section, at least one perforation 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 a first block, and the first perforated section is located in a second block. The first non-perforated section is arranged on the first block of the bending part so as to avoid the breakage of the metal wiring; the first opening section is arranged on the second block to reduce the hardness of the whole metal wire, reduce the resilience force of the metal wire and improve the problem of film separation.

Description

Display panel
Technical Field
The present disclosure relates to display technologies, and in particular, to a display panel.
Background
In the terminal bending process of the OLED display screen product at present, after the OLED display panel terminal is bent, the metal wiring in the bending area is subjected to the action of larger bending stress, so that stress concentration is easy to generate and breakage occurs; meanwhile, after the terminal is bent, the bending area can also generate resilience force, and film separation easily occurs, so that the back plate is separated from the terminal area gasket or the panel is separated from the back plate. In addition, after the terminal is bent, the panel and the backboard can generate mutual extrusion action at the end point of the backboard, namely the bent end point, and stress concentration can be formed at the position, so that metal wiring is easy to break.
In addition, compared with the metal wire without holes, the metal wire with holes is softer than the metal wire without holes due to the design of holes, so that the terminal has small resilience force after bending, and film separation is not easy to occur. However, the open-cell metal trace tends to create stress concentrations at the edges of the hole parallel to the bending direction, resulting in metal trace breakage.
Disclosure of Invention
The embodiment of the application provides a display panel to solve current display panel and buckle the back trompil formula metal wiring 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 with the display part, and the other end of the metal wire is connected with the binding part;
the bending part comprises a first block and a second block, and the second block is positioned at one side of the first block, which is close to the display part; the bending stress born by the first block comprises a first stress, the bending stress born by the second block comprises a second stress, and the first stress is larger than the second stress;
the metal wire comprises a first non-perforated section and a first perforated section, at least one perforation 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, in a direction from the second block to the first block, at least a portion of the openings have a decreasing size.
In the display panel of the embodiment of the present application, the first open hole section includes a first sub-section, and the first sub-section is connected to the first non-open hole section;
the size of the openings on the first subsection decreases in a direction from the second block toward the first block.
In the display panel according to the embodiment of the application, the opening includes a major axis and a minor axis; in the first subsection, the major axis of the aperture decreases according to a first rule and/or the minor axis of the aperture decreases according to a second rule in a direction from the second block to the first block.
In the display panel of 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 the first set length;
the second rule is: the short axis length of the first aperture is equal to a second set multiple of the short axis length of the second aperture, or the short axis length of the first aperture is equal to the short axis length of the second aperture minus a second set length.
In the display panel according to the embodiment of the application, the extension direction of the short axis is parallel to the bending direction of the bending portion, and the length of the short axis is smaller than the length of the long axis.
In the display panel of the embodiment of the application, the display portion further includes a second substrate and a first back plate, and the first back plate is disposed on the 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 born by the third block comprises a third stress, and the third stress is larger than the second stress;
the metal 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 of the embodiment of the present application, the first hole section further includes a second sub-section, one end of the second sub-section is connected to the first sub-section, and the other end of the second sub-section is connected to the second non-hole section;
the size of the openings on the second subsection decreases in a direction from the second block toward the third block.
In the display panel according to the embodiment of the present application, in the second subsection, in a direction from the second block toward the third block, a major axis of the opening is decreased according to a third rule, and/or a minor axis of the opening is decreased according to a fourth rule.
In the display panel of the embodiment of the application, the first stress is greater than the third stress, the length of the second non-open hole section is less than or equal to the length of the first non-open hole section, and the length of the first open hole section is greater than the length of the second non-open hole section.
In the display panel of the embodiment of the application, the shape of the opening has a long axis and a short axis, the extending direction of the long axis is perpendicular to the extending direction of the short axis, and the extending direction of the short axis is parallel to the width direction of the metal trace.
The display panel is provided with the first non-perforated section at the first block of the bending part so as to avoid the breakage of the metal wiring; the first opening section is arranged on the second block to reduce the hardness of the whole metal wire, reduce the resilience force of the metal wire and improve the problem of film separation.
Drawings
In order to more clearly illustrate the embodiments of the present application, the drawings that are used in the embodiments will be briefly described below. The drawings in the following description are only some of the embodiments of the present application and other drawings may be derived from these drawings by those skilled in the art without the exercise of inventive faculty.
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 metal wire of a display panel in a flat state according to an embodiment of the disclosure;
fig. 4 is a schematic view of a part of a structure of a metal trace of a display panel according to an embodiment of the disclosure;
FIG. 5 is a schematic diagram of a structure of a metal trace of a display panel according to an embodiment of the present disclosure;
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 will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In this application, unless expressly stated or limited otherwise, a first feature "on" a second feature may include both the first and second features being in direct contact, or may include both the first and second features not being in direct contact but being in contact by another feature therebetween. Moreover, the "above," "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in 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 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 including a display portion 100, a bending portion 200, and a binding portion 300. The bent portion 200 is connected between the display portion 100 and the binding portion 300. The binding portion 300 is disposed at the rear side of the display portion 100 through the bending portion 200.
The display surface is a front surface of the display portion 100, and a surface of the display portion 100 opposite to the display surface is a back surface of the display portion 100. For example, the display surface faces the user, and 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, second, and third substrates 111, 112, 113 may also be different.
The display portion 100 includes a second substrate 112, an OLED device layer 13, and a first back plate 14. The OLED device layer 13 is disposed on the second substrate 112. The first back plate 14 is disposed on the back surface of the second substrate 112, that is, the first back plate 14 is disposed on a surface of the second substrate 112 facing away from the OLED device layer 13.
The bonding part 300 includes a third substrate 113, a bonding terminal 15, and a second back plate 16, the bonding terminal 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 bonding terminal 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 portion 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 block B3, the second block B2, the first block B1, the fourth block B4 and the fifth block B5 are sequentially connected to the end of the display portion 100 facing the bending portion 200, and the fifth block B5 is connected to the binding portion 300.
Specifically, the second block B2 is located at a side of the first block B1 near the display portion 100. One end of the third block B3 is connected to the display portion 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 received by the first block B1 includes a first stress, the bending stress received by the second block B2 includes a second stress, and the bending stress received by the third block B3 includes a third stress. The bending stress to which the fourth block B4 is subjected includes a fourth stress, and the bending stress to which the fifth block B5 is subjected 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 received by the first block B1 is the average stress of the sum of the bending stresses received by 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 stress of each point of the second block B2; the bending stress born by the third block B3 is the average stress of the sum of the bending stress born by each point of the third block B3; the bending stress received by the fourth block B4 is the average stress of the sum of the bending stresses received by each point of the fourth block B4; the bending stress applied to the fifth block B5 is also the average stress of the sum of the bending stresses applied to 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, may be tensile stress or compressive stress, and the tensile stress, that is, the first stress, the second stress, the third stress, the fourth stress and the fifth stress are all tensile stress, which is described in this embodiment, but not limited thereto.
Referring to fig. 3, the metal trace 12 includes a first non-open hole section S1, a first open hole section L1, a second non-open hole section S2, a second open hole section L2 and a third non-open hole section 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 the 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-perforated section S1 is located in the first block B1. The first opening section L1 is located in the second block B2. The second non-perforated section S2 is located in the third block B3. The second opening section L2 is located in the fourth block B4. The third non-perforated section S3 is located in the fifth block B5.
At least one aperture 121 is provided in the first and second aperture segments L1 and L2. No openings are provided in the first, second and third non-perforated sections S1, S2 and S3.
The first non-perforated section S1 is connected to the first perforated section L1. One end of the second non-perforated section S2 is connected to the first perforated section L1, and the other end of the second non-perforated section S2 is connected to the display portion 100.
The display panel 1000 of the present embodiment does not provide openings on the metal traces 12 of the first, third and fifth blocks B1, B3 and B5 of the bending portion 200 to avoid the metal traces 12 of the first, third and fifth blocks B1, B3 and B5 from breaking. Openings are formed in the metal wires 12 of the second block B2 and the fourth block B4 to reduce the hardness of the whole metal wire 12, reduce the resilience force, and improve the problem of film separation.
Specifically, referring to fig. 4, in the display panel 1000 of the present embodiment, in the first hole segment L1, the size of the hole 121 decreases in the direction from the second block B2 to the first block B1.
Specifically, in the display panel 1000 of the present embodiment, the first opening section L1 includes a first sub-section L11 and a second sub-section L12. The first subsection L11 is connected to the first non-perforated section S1. One end of the second subsection L12 is connected with the first subsection L11, and the other end of the second subsection L12 is connected with the second non-perforated section S2.
The size of the opening 121 on the first subsection L11 decreases in the direction from the second block B2 toward the first block B1. The size of the opening 121 on the second subsection L12 decreases in the direction from the second block B2 to the third block B3.
The compressive stress applied to the first subsection L11 in the direction from the second block B2 to the first block B1 is increased, so that the decreasing size of the opening 121 in the first subsection L11 can effectively reduce the risk of film separation and ensure that the metal trace 12 has a suitable hardness.
The compressive stress applied to the second subsection L12 in the direction from the second block B2 to the third block B3 is increased, so that the decreasing size of the opening 121 in the second subsection L12 can effectively reduce the risk of film separation and ensure that the metal trace 12 has a suitable hardness. In summary, the smallest stress of the first opening section L1 is the junction between the first sub-section L11 and the second sub-section L12. From the juncture of first trompil section L1 to the both ends direction of first trompil section L1 respectively, the stress that first trompil section L1 received is progressively increased, and the size of the trompil 121 on the first trompil section L1 is progressively decreased to effectual reduction membrane layer separation's risk and assurance metal wire 12 have suitable hardness.
Referring to fig. 5, in the second hole segment L2, the size of the hole 121 decreases in the direction from the fourth block B4 to the first block B1.
Specifically, the second perforated section L2 includes a third sub-section L21 and a fourth sub-section L22. The third subsection L21 is connected to the first non-perforated section S1. One end of the fourth subsection L22 is connected with the third subsection L21, and the other end of the fourth subsection L22 is connected with the fourth non-perforated section S4.
The size of the opening 121 on the second opening section L2 decreases in the direction from the fourth block B4 toward the first block B1.
The size of the opening 121 in the fourth subsection L22 decreases in the direction from the fourth block B4 to the fifth block B5.
The compressive stress applied to the second opening section L2 in the direction from the fourth block B4 to the first block B1 increases, so that the decreasing size of the openings 121 in the second opening section L2 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 fourth sub-segment L22 is in an increasing state in the direction from the fourth block B4 to the fifth block B5, the decreasing size of the opening 121 on the fourth sub-segment L22 can effectively reduce the risk of film separation and ensure that the metal trace 12 has a suitable hardness.
In summary, the smallest stress of the second opening section L2 is the junction of the third subsection L21 and the fourth subsection L22. From the juncture of second trompil section L2 to second trompil section L2's both ends orientation respectively, the stress that second trompil section L2 received is progressively increased, and the size of the trompil 121 on the second trompil section L2 is progressively decreased to effectual reduction membrane layer separation's risk and assurance metal trace 12 have suitable 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 stress is minimum.
In the display panel 1000 of the present embodiment, the size of the opening 121 may be a long and short axis, a radius, a long and wide or diagonal length, and 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 aperture 121 has an elliptical shape. Referring to fig. 6, the opening 121 includes a major axis f and a minor axis e. The extension direction of the short axis e is parallel to the width direction of the metal trace 12, and the extension direction of the long axis f is perpendicular to the extension direction of the short axis e. In this embodiment, the elliptical openings 121 are adopted, so that on one hand, the situation that the edge portions of the two sides of the metal wire 12 are too narrow in the wire width direction can be avoided, and the risk of breakage of the metal wire 12 is reduced; on the other hand, the aperture ratio of the metal wire 12 can be increased, and the hardness of the metal wire 12 can be reduced.
Referring to fig. 6, in the first subsection 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 a direction from the second block B2 to the first block B1.
In the second subsection L12, the major axis f of the aperture 121 decreases according to a third rule and/or the minor axis e of the aperture 121 decreases according to a fourth rule in a direction from the second block B2 to the third block B3.
Specifically, in the two adjacent openings 121, the opening 121 near 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 length of the minor axis e of the first aperture is equal to a second set multiple of the length of the minor axis e of the second aperture, or the length of the minor axis e of the first aperture is equal to the length of the minor axis e of the second aperture minus the second set length.
The third rule is: the length of the long axis f of the first opening is equal to a third set multiple of the length of the long axis f 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 third set length.
The fourth rule is: the length of the minor axis e of the first aperture is equal to a fourth set multiple of the length of the minor axis e of the second aperture, or the length of the minor axis e of the first aperture is equal to the length of the minor axis e of the second aperture minus the fourth set length.
In this embodiment, the 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 length of the short axis e of the first opening is equal to a second set multiple of the length of the short axis e of the second opening; the third rule is that the length of the long axis f of the first opening is equal to a third set multiple of the length of the long axis f of the second opening; the fourth rule is described by taking the example that the length of the minor axis e of the first opening is equal to the fourth set multiple of the length of the minor axis e of the second opening, but the rule is not limited thereto.
Specifically, the first set multiple and the third set multiple are each in a range of 0.6 to 0.95, including 0.6 and 0.95. The second set multiple and the fourth set multiple are each in the range of 0.6 to 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.
Wherein, the larger the first, second, third and fourth set times, the more gradual the decreasing trend of the openings 121, the lower the hardness and resilience of the metal trace 12. Optionally, the first, second, third and fourth set multiples are equal, and the fourth set multiple is equal to 0.9.
In some embodiments, the first, second, third, and fourth set times may also be unequal.
In some embodiments, the adjacent two first setting multiples on the first subsection L11 decrease in the direction from the second block B2 to the first block B1.
In the display panel 1000 of the present embodiment, the extension 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 the length of the long axis f. Since the metal trace 12 is most stressed in a direction parallel to the bending direction, the provision of the short axis e having a length smaller than that of the long axis f can alleviate the stress concentration phenomenon.
In the first hole segment L1 and the second hole segment L2, the interval between any two adjacent holes 121 is a set interval h, and in this embodiment, the set interval is between 2 microns and 6 microns, including 2 microns and 6 microns. An optional set pitch h is 4 microns.
In the display panel 1000 of the present embodiment, the metal trace 12 is composed of three metal film layers of Ti/Al/Ti, the thicknesses are 0.05, 0.6 and 0.08 μm, respectively, and the total thickness is 0.73 μm. 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, ti film layers by PVD (physical vapor deposition) process, and then forming the openings 121 by exposure, development, and etching processes.
In some embodiments, the metal trace 12 may also be a single or double layer metal film structure, such as Cu, al, ag, mo/Cu.
The individual metal traces 12 have a line width between 8 microns and 12 microns, including 8 microns and 12 microns, and optionally, the metal traces 12 have a line width of 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 between 0.2 and 0.6 times the line width of the metal trace 12, so as to avoid the edge portion of the metal trace 12 being too narrow and reduce the risk of breakage of the metal trace 12.
Alternatively, the largest dimension of the openings 121 is short axis e=7.5 microns and long axis f=8.5 microns.
In the display panel 1000 of the present embodiment, the first stress is greater than the third stress, the length of the second non-open hole section S2 is less than or equal to the length of the first non-open hole section S1, and the length of the first open hole section L1 is greater than the length of the second non-open hole section S2. This arrangement reduces the risk of breakage of the metal tracks 12.
In the display panel 1000 of the present embodiment, the shape of the opening on the second opening section L2 is the same as or different from the shape of the first opening section L1. The rule of gradual change of the size of the opening 121 on the second opening section L2 is the same as or different from the rule of gradual change of the size of the opening 121 on the first opening section L1.
In the display panel 1000 of the present embodiment, the first block B1 has a maximum stress, and the stress decreases in the directions of the two ends of the first block B1.
For example, referring to fig. 1, when the bending portion 200 is in an arc shape, the maximum stress of the first block B1 is located in the middle of the first block B1, i.e. at 1/2 of the arc, and decreases toward both ends; the minimum stress parts of the second block B2 and the fourth block B4 are respectively positioned at a 1/4 circular arc part and a 3/4 circular arc part in sequence.
In addition, it should be noted that, during the bending process, the bending portion 200 causes an increase in the compressive stress of the third block B3 due to the mutual extrusion between the end of the third block B3 and the end of the first back plate 14, and also causes a corresponding increase in the tensile stress of the third block B3 due to the extrusion; similarly, the fifth block B5 and the second back plate 16 are pressed against each other at their ends, resulting in an increase in compressive and tensile stresses to which the fifth block B5 is subjected.
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 in length.
Optionally, the lengths of the first, third and fifth blocks B1, B3 and B5 are between 100 micrometers and 220 micrometers, respectively, including 100 micrometers and 220 micrometers. This is arranged to avoid greater resilience causing separation of the layers.
In the present embodiment, the lengths of the first block B1, the third block B3 and the fifth block B5 are 160 μm.
In addition, in the display panel 1000 of the present embodiment, the first stress, the third stress, and the fifth stress are each 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 openings are provided on the metal wires 12 of the first, third and fifth blocks B1, B3 and B5 of the bending portion 200 to avoid the breakage of the metal wires 12; openings 121 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 its resilience, and improve the film separation.
The foregoing has described in detail a display panel provided by embodiments of the present application, and specific examples have been applied herein to illustrate the principles and embodiments of the present application, where the foregoing examples are only for aiding in understanding of the technical solutions and core ideas of the present application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. The utility model provides a display panel, includes display portion, kink and binding portion, the kink is connected display portion with between the binding portion, binding portion pass through the kink set up in the back side of display portion, the kink includes first base plate and metal wire, the metal wire sets up on the first base plate, the one end of metal wire connect in display portion, the other end of metal wire connect in binding portion, its characterized in that:
the bending part comprises a first block and a second block, and the second block is positioned at one side of the first block, which is close to the display part; the bending stress born by the first block comprises a first stress, the bending stress born by the second block comprises a second stress, and the first stress is larger than the second stress;
the display part further comprises a second substrate and a first backboard, and the first backboard is arranged on the 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 born by the third block comprises a third stress, and the third stress is larger than the second stress;
the metal wiring comprises a first non-perforated section, a first perforated section and a second non-perforated section, wherein at least one perforation is arranged on the first perforated section, the first non-perforated section is connected with the first perforated section, one end of the second non-perforated section is connected with the first perforated section, the first non-perforated section is positioned in the first block, the first perforated section is positioned in the second block, the other end of the second non-perforated section is connected with the display part, and the second non-perforated section is positioned in the third block;
the first perforated section comprises a first sub-section and a second sub-section, and the first sub-section is connected with the first non-perforated section; one end of the second sub-section is connected with the first sub-section, and the other end of the second sub-section is connected with the second non-perforated section;
the size of the opening on the first subsection decreases in the direction from the second block to the first block; the size of the openings on the second subsection decreases in a direction from the second block toward the third block.
2. The display panel of claim 1, wherein the aperture comprises a major axis and a minor axis; in the first subsection, in a direction from the second block toward the first block, a major axis of the opening decreases according to a first rule and/or a minor axis of the opening decreases according to a second rule;
setting the opening close to the first block as a first opening in two adjacent openings, and setting the other opening 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 the first set length;
the second rule is: the short axis length of the first aperture is equal to a second set multiple of the short axis length of the second aperture, or the short axis length of the first aperture is equal to the short axis length of the second aperture minus a second set length.
3. The display panel according to claim 2, wherein 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.
4. The display panel according to claim 1, wherein in the second subsection, the major axis of the aperture decreases according to a third rule and/or the minor axis of the aperture decreases according to a fourth rule in a direction from the second section to the third section.
5. The display panel of claim 1, wherein the first stress is greater than the third stress, the second non-perforated section has a length less than or equal to a length of the first non-perforated section, and the first perforated section has a length greater than a length of the second non-perforated section.
6. The display panel according to claim 1, wherein 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 an extending direction of the short axis is parallel to a width direction of the metal wiring.
7. The display panel of claim 1, wherein the bending portion further comprises a fourth block connected to the first block and a fifth block connected to the fourth block, the fifth block being connected to the binding portion, the bending stress to which the fourth block is subjected comprising a fourth stress, the bending stress to which the fifth block is subjected comprising a fifth stress, the first stress being greater than the fourth stress, the fifth stress being greater than the fourth stress;
the metal wire comprises a second open-pore section connected with the first open-pore section and a third open-pore section connected with the second open-pore section, the second open-pore section is positioned in the fourth block, the third open-pore section is positioned in the fifth block, and at least one open-pore is arranged on the second open-pore section.
8. The display panel of claim 7, wherein the second open cell segment comprises a third sub-segment and a fourth sub-segment, the third sub-segment being connected to the first non-open cell segment, one end of the fourth sub-segment being connected to the third sub-segment, the other end of the fourth sub-segment being connected to the fourth non-open cell segment;
the size of the opening on the third subsection decreases from the fourth block to the first block; the size of the opening on the fourth subsection decreases from the fourth block to the fifth block.
9. The display panel of claim 7, wherein the length of the first section, the length of the third section, and the length of the fifth section are equal; or the first block length is greater than the fifth block, and the length of the third block is equal to the length of the fifth block.
10. The display panel of claim 9, wherein the first, third and fifth segments are each between 100 microns and 220 microns in length.
CN202110011342.3A 2021-01-06 2021-01-06 Display panel Active CN112750805B (en)

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KR102398331B1 (en) * 2017-11-01 2022-05-16 엘지전자 주식회사 Flexible display unit and mobile terminal having the same
CN208077535U (en) * 2018-04-28 2018-11-09 京东方科技集团股份有限公司 A kind of flexible display panels and flexible display apparatus

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CN109100914A (en) * 2018-06-29 2018-12-28 武汉华星光电半导体显示技术有限公司 Mask plate and flexible display panels
CN110335544A (en) * 2019-06-18 2019-10-15 武汉华星光电半导体显示技术有限公司 OLED display panel and display device
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