WO2020253000A1 - Oled 显示面板及显示装置 - Google Patents

Oled 显示面板及显示装置 Download PDF

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Publication number
WO2020253000A1
WO2020253000A1 PCT/CN2019/111616 CN2019111616W WO2020253000A1 WO 2020253000 A1 WO2020253000 A1 WO 2020253000A1 CN 2019111616 W CN2019111616 W CN 2019111616W WO 2020253000 A1 WO2020253000 A1 WO 2020253000A1
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WO
WIPO (PCT)
Prior art keywords
area
bending area
bending
display panel
oled display
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2019/111616
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English (en)
French (fr)
Inventor
周阳
金武谦
高洪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Original Assignee
Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority to US16/612,407 priority Critical patent/US11678514B2/en
Publication of WO2020253000A1 publication Critical patent/WO2020253000A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
    • H10K77/10—Substrates, e.g. flexible substrates
    • H10K77/111—Flexible substrates
    • 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
    • G09F9/301—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 flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • 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
    • 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
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • 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
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/131—Interconnections, e.g. wiring lines or terminals
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/311—Flexible OLED
    • 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

Definitions

  • the present disclosure relates to the field of display technology, and in particular to an OLED display panel and a display device.
  • OLED Organic Light-Emitting Diode
  • the present disclosure provides an OLED display panel and a display device, which solves the problem of the existing OLED display panel and display device.
  • the metal traces located in the bending area are prone to stress concentration and cracks, which may lead to signal transmission failure, There is an abnormal technical problem on the screen.
  • the embodiments of the present disclosure provide an OLED display panel, including:
  • a display area, the back of the display area is provided with a first backplane
  • the binding area is located on the back of the display area, and the surface of the binding area is provided with a second backplane;
  • the bending area is located between the display area and the binding area, and metal wiring is provided in the bending area;
  • a tensile stress area and a compressive stress area are generated in the metal trace, and a plurality of via holes are distributed on the metal trace, which corresponds to the tensile stress
  • the distribution density of the via holes in the region is different from the distribution density of the via holes in the compressive stress region.
  • the distribution density of the via holes corresponding to the tensile stress area is greater than the distribution density of the via holes corresponding to the compressive stress area.
  • the bending area in the bending state is semicircular arc shape.
  • the center lines of the vias intersect at one or more points.
  • the bending area in the bending state is non-semi-circular arc shape.
  • the bending area includes a first bending area, a second bending area, and a third bending area, and the second bending area is close to the display area.
  • the third bending area is close to the binding area
  • the first bending area is located between the second bending area and the third bending area
  • the first bending area is semicircular arc shape , wherein the center line of the OLED display panel coincides with the bending apex of the bending area.
  • the via hole is provided in the first bending area.
  • the bending area includes a first bending area, a second bending area, and a third bending area, and the second bending area is close to the display area.
  • the third bending area is close to the binding area
  • the first bending area is located between the second bending area and the third bending area
  • the first bending area is semicircular arc shape , wherein the center line of the OLED display panel does not coincide with the bending apex of the bending area, and the length of the third bending area is smaller than the length of the second bending area.
  • the via holes are provided in the first bending area and the third bending area.
  • a reinforcing plate is further provided between the first back plate and the second back plate.
  • the embodiments of the present disclosure provide an OLED display panel, including:
  • the binding area is located on the back of the display area.
  • the bending area is located between the display area and the binding area, and metal wiring is provided in the bending area;
  • a tensile stress area and a compressive stress area are generated in the metal trace, and a plurality of via holes are distributed on the metal trace, which corresponds to the tensile stress
  • the distribution density of the via holes in the region is different from the distribution density of the via holes in the compressive stress region.
  • the distribution density of the via holes corresponding to the tensile stress area is greater than the distribution density of the via holes corresponding to the compressive stress area.
  • the bending area in the bending state is semicircular arc shape.
  • the center lines of the vias intersect at one or more points.
  • the bending area in the bending state is non-semi-circular arc shape.
  • the bending area includes a first bending area, a second bending area, and a third bending area, and the second bending area is close to the display area.
  • the third bending area is close to the binding area
  • the first bending area is located between the second bending area and the third bending area
  • the first bending area is semicircular arc shape , wherein the center line of the OLED display panel coincides with the bending apex of the bending area.
  • the via hole is provided in the first bending area.
  • the bending area includes a first bending area, a second bending area, and a third bending area, and the second bending area is close to the display area.
  • the third bending area is close to the binding area
  • the first bending area is located between the second bending area and the third bending area
  • the first bending area is semicircular arc shape , wherein the center line of the OLED display panel does not coincide with the bending apex of the bending area, and the length of the third bending area is smaller than the length of the second bending area.
  • the via holes are provided in the first bending area and the third bending area.
  • the embodiments of the present disclosure provide a display device including the above-mentioned OLED display panel.
  • the beneficial effects of the present disclosure are: the OLED display panel and the display device provided by the present disclosure have different density of via holes corresponding to different stress distributions in the metal traces located in the bending area, which can effectively relieve the stress and reduce the cracks caused by the metal traces. Poor failure and other problems have improved the yield, reduced the process difficulty, and can make the OLED display panel have a smaller bendable angle, achieve a narrower frame, and provide favorable conditions for local thinning.
  • FIG. 1 is a schematic diagram of the via distribution structure in the bending area of the first OLED display panel provided by the disclosed embodiments;
  • 2A-2C are schematic diagrams of the via density in the bending area of the OLED display panel in FIG. 1;
  • 3A is a schematic diagram of a via distribution structure of the OLED display panel in FIG. 1 in an expanded state of the bending area;
  • 3B is a schematic diagram of the via distribution structure in the bending state of the bending area of the OLED display panel in FIG. 3A;
  • 4A is a schematic diagram of another via distribution structure in the expanded state of the bending area of the OLED display panel in FIG. 1;
  • FIG. 4B is a schematic diagram of the via distribution structure in the bending state of the bending area of the OLED display panel in FIG. 4A;
  • FIG. 5 is a schematic diagram of the via distribution structure in the bending area of the second OLED display panel provided by the disclosed embodiments;
  • FIG. 6 is a schematic diagram of a via distribution structure in a bending area of a third OLED display panel provided by an embodiment of the disclosure.
  • FIG. 7 is a schematic diagram of the via distribution structure in the bending area of the fourth OLED display panel provided by the disclosed embodiments.
  • the present disclosure is directed to the prior art OLED display panel and display device.
  • the metal traces located in the bending area are easy to stress concentration, causing cracks, resulting in signal transmission failure and abnormal images.
  • This embodiment can solve the problem defect.
  • the OLED display panel provided by the first embodiment of the present disclosure includes a display area 10, a binding area 20 located on the back of the display area 10, and between the display area 10 and the binding area 20
  • the bending area 30 of the TFT wherein the display area 10 is used to display images, the display area 10 further includes an array substrate, the array substrate includes an array of thin film transistor device layers, the surface of the thin film transistor device layer is provided with OLED device layer; a first backplane 40 is provided on the back of the display area 10, and the first backplane 40 is used to carry the display area 10.
  • Metal traces are provided in the bending area 30; for example, the metal traces are GOA circuit traces, one end of the metal trace extends into the display area 10 and is connected to the thin film transistor device layer And the OLED device layer; the opposite end of the metal trace is bent to the binding area 20, the surface of the binding area 20 is provided with a second back plate 50, the second back plate 50 is used Support the binding area 20, wherein a flexible printed circuit board is arranged in the binding area 20, and the other end of the metal trace is connected to the flexible printed circuit board; the first backplane 40 and the second A reinforcing plate 60 is also arranged between the two back plates 50 to improve the overall stability of the OLED display panel after bending.
  • the metal traces are GOA circuit traces, one end of the metal trace extends into the display area 10 and is connected to the thin film transistor device layer And the OLED device layer; the opposite end of the metal trace is bent to the binding area 20, the surface of the binding area 20 is provided with a second back plate 50, the second back plate 50 is used
  • a plurality of via holes 70 are distributed on the metal trace.
  • the metal trace When the bending area 30 is bent into the binding area 20, the metal trace generates a tensile stress area 301 and a compressive stress area 302.
  • the distribution density of the via holes 70 corresponding to the tensile stress area 301 is different from the distribution density of the via holes 70 corresponding to the compressive stress area 302.
  • the distribution density of the via holes 70 corresponding to the tensile stress area 301 is different.
  • the distribution density of the via holes 70 is greater than the distribution density of the via holes 70 corresponding to the compressive stress area 302.
  • the distribution density of the via holes 70 is defined as the bending area per unit length The area of the vias in 30, that is, the area of the vias 70 divided by the length of the bending region 30; when the area of each via 70 is fixed, the distribution density of the vias 70 It can be simplified as the number of the vias 70 or the distance between two adjacent vias 70, wherein the distribution density of the vias can be referred to FIG. 2A, FIG. 2B and FIG. 2C.
  • the distance between two adjacent via holes 70 is fixed, which is both d, and the area of each via hole 70 is fixed.
  • the number of vias 70 in the compressive stress area 302 is greater than the number of vias 70, so that the distribution density of the vias 70 in the tensile stress area 301 is greater than the distribution of the vias 70 in the compressive stress area 302 density.
  • each via 70 is fixed, and the distance between two adjacent vias 70 of the tensile stress region 301 is smaller than that of the adjacent two of the compressive stress region 302.
  • the distance between the via holes 70 specifically, d1 ⁇ d2 ⁇ d3 ⁇ d4 ⁇ d5, so that the distribution density of the via holes 70 in the tensile stress region 301 is greater than that of the via holes 70 in the compressive stress region 302 The distribution density.
  • the distance between two adjacent via holes 70 is fixed, and both are d.
  • the area of the via hole 70 of the tensile stress region 301 larger than that of the compressive stress region 302
  • the area of the hole 70 specifically, S1>S2>S3, makes the distribution density of the via 70 in the tensile stress region 301 greater than the distribution density of the via 70 in the compressive stress region 302.
  • the bending area 30 is semi-circular arc shape, that is to say, the bending area 30 only includes a circular arc, which can make the bendable angle of the OLED display panel smaller, and thus obtain a narrower
  • the frame makes it possible to thin locally.
  • the area located at both ends of the bending area 30 is the tensile stress area 301
  • the area located in the middle of the bending area 30 is the compressive stress area 302. It can be understood from the mechanical analysis that the area located at The tensile stress area 301 at both ends of the bending area 30 is subjected to severe bending stress, that is, this area is most prone to fracture.
  • the distribution density of the vias 70 located in the tensile stress area 301 is greater than that located in the tensile stress area 301.
  • the distribution density of the vias 70 in the compressive stress region 302, that is, the vias 70 corresponding to the tensile stress region 301 with larger bending stress are densely distributed, and the compressive stress region 302 with smaller bending stress corresponds to
  • the distribution of the via holes 70 is sparse, which reduces the bending stress of each area, avoids stress concentration, and improves the bending performance of the OLED display panel.
  • the distribution mode of the vias 70 may be uniform and orderly, or may be disordered.
  • the centerline of the via 70 may intersect at a point.
  • the centerline of the via 70 is perpendicular to the unfolded
  • the bending area 30 in the state that is, the center line of the via 70 is perpendicular to the tangent line of the bending area 30 in the bending state, when any point on the bending area 30 shares a center
  • the center line of each of the via holes 70 may intersect at a point, that is, the center line of each of the via holes 70 intersect at the center of the bending area 30.
  • the centerline of the via hole 70 may also intersect at multiple points. For example, as shown in FIGS. 4A and 4B, the centerline of the via hole 70 and the bending region 30 in the expanded state form a line.
  • the inclination angle that is, the center line of each of the via holes 70 intersects at a plurality of points in the arc formed by the bending area 30 in the bending state.
  • the shape of the via 70 is, but is not limited to, a rectangle, and can also be one or more combinations of square, circular, triangular, trapezoidal, or irregular shapes.
  • the bending area 30 When the bending area 30 is in a bending state, the bending area 30 does not necessarily have a semi-circular arc shape, and the bending area 30 may also be a non-semi-circular arc shape, that is, the bending area 30
  • the area 30 is composed of multiple arcs.
  • FIG. 5 is a schematic diagram showing the distribution structure of the vias 70 in the bending area 30 of the OLED display panel provided in the second embodiment of the disclosure.
  • the bending area 30 is a symmetrical structure.
  • the bending area 30 is composed of multiple circular arcs, which can pass through the bending apex B of the bending area 30 as the curvature of the arc including the bending apex B Circle, the diameter of the curvature circle in the vertical direction divides the bending area 30 into a first bending area 31, a second bending area 32, and a third bending area 33, wherein the second bending area 32 is close to the display area 10, the third bending area 33 is close to the binding area 20, and the first bending area 31 is located between the second bending area 32 and the third bending area 33 Between, wherein the first bending area 31 is semi-circular arc shape, the center line AA of the OLED display panel coincides with the bending vertex B, and the
  • the first bending area 31 is a stress concentration area
  • the metal wiring in the first bending area 31 generates a first tensile stress area 311 and a first compressive stress area 312.
  • the second bending area 32 and the third bending area 33 are stress relief areas.
  • the first bending area 31 may be provided with the via 70, that is, according to the via 70 located in the first tensile stress area 311
  • the distribution density of the vias 70 is greater than the distribution density of the vias 70 located in the first compressive stress region 312.
  • the distribution of the vias 70 is designed.
  • the via holes 70 may or may not be distributed in the second bending area 32 and the third bending area 33, and the embodiment of the disclosure should not be limited thereto.
  • FIG. 6 is a schematic diagram of the via distribution structure in the bending area of an OLED display panel provided in the third embodiment of the disclosure.
  • the bending area 30 is composed of multiple arcs, and the center line AA of the OLED display panel coincides with the bending vertex B of the bending area 30; the difference from FIG. 5 is that in this embodiment, the bending area 30 It is an asymmetric structure.
  • the curvature circle of the arc including the bending vertex B can pass through the bending vertex B, and the diameter of the curvature circle in the vertical direction divides the bending area 30 into the first A bending area 31, a second bending area 32 and a third bending area 33.
  • the length of the third bending area 33 is smaller than the length of the second bending area 32.
  • the first bending area 31 is a stress concentration area, and a zero tensile stress area 301 and a zero compressive stress area 302 are generated in the first bending area 31.
  • the second bending area 32 and the third bending area 33 are stress flat areas.
  • the first bending area 31 may be provided with the overpass Holes 70, that is, the distribution of the vias 70 is designed according to the distribution density of the vias 70 located in the zero tensile stress area 301 is greater than the distribution density of the vias 70 located in the zero compressive stress area 302
  • the specific distribution structure of the via holes 70 please refer to the first embodiment, which will not be repeated here.
  • the via holes 70 may be distributed in the second bending area 32 and the third bending area 33, or the via holes 70 may not be distributed, and the second bending area 32 may not be distributed.
  • the distribution density of the via holes 70 provided with the third bending area 33 is specifically limited, and the embodiment of the present disclosure should not be limited thereto.
  • FIG. 7 shows a schematic diagram of the via distribution structure in the bending area of an OLED display panel provided in the fourth embodiment of the disclosure.
  • the difference from FIG. 5 is that the OLED display panel has The center line AA does not coincide with the bending apex B of the bending area 30, that is, the bending area 30 has an asymmetric structure.
  • a circle of curvature including the arc of the bending vertex B can pass through the bending vertex B.
  • the diameter of the curvature circle in the vertical direction divides the bending region 30 into a first bending region 31 and a second bending region 31.
  • a second bending area 32 and a third bending area 33 the second bending area 32 is close to the display area 10, the third bending area 33 is close to the binding area 20, the first bending area
  • the area 31 is located between the second bending area 32 and the third bending area 33.
  • the first bending area 31 is in the shape of a semicircular arc.
  • the center line AA of the OLED display panel The bending apex B of the bending area 30 does not overlap, and the length of the third bending area 33 is less than the length of the second bending area 32, and the bending apex B of the bending area 30 is located at Inside the first bending area 31.
  • the stress in the first bending area 31 is relatively concentrated, and the zero tensile stress area 301 and the compressive stress area 302 are generated in the first bending area 31; and Since the length of the second bending area 32 is greater than the length of the third bending area 33, the stress distribution of the third bending area 33 is more concentrated than that of the second bending area.
  • the first bending area 31 and the third bending area 32 are provided with the via 70 according to the stress condition of the metal trace, that is, according to the size of the via 70 located in the tensile stress area 301
  • the distribution density is greater than the distribution density of the via holes 70 located in the compressive stress area 302, and the distribution of the via holes 70 is designed according to the actual stress conditions received in the third bending area, wherein the For the specific distribution structure of the via holes 70, please refer to the first embodiment, which will not be repeated here.
  • the via holes 70 may or may not be distributed in the second bending area 32, and the via holes 70 provided in the second bending area 32 are not distributed.
  • the density is specifically limited, and the embodiments of the present disclosure should not be limited thereto.
  • the metal traces of the second bending area 32 can be configured with the vias 70 according to the stress conditions of the metal traces, which will not be repeated here.
  • the embodiments of the present disclosure also provide a display device, the display device includes the OLED display panel, and the technical effects of the display device are the same as those of the OLED display panel. Please refer to the above-mentioned embodiments. I will not repeat them here.
  • the OLED display panel and the display device provided by the embodiments of the present disclosure have different density of via holes corresponding to different stress distributions in the metal traces located in the bending area, which can effectively relieve the stress and reduce the failure caused by the metal trace cracks. Defects and other issues improve the yield, reduce the process difficulty, and can make the bendable angle of the OLED display panel smaller, achieve a narrower frame, and provide favorable conditions for local thinning.

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Abstract

一种OLED显示面板及显示装置，OLED显示面板包括显示区域(10)、绑定区域(20)和弯折区域(30)，弯折区域(30)内的金属走线产生拉应力区域(301)与压应力区域(302)，在金属走线上分布有多个过孔(70)，其中对应拉应力区域(301)的过孔(70)的分布密度与对应压应力区域(302)的过孔的分布密度不同，能够缓解应力，减少失效不良，使可弯折角度更小，实现更窄边框。

Description

OLED显示面板及显示装置 技术领域
本揭示涉及显示技术领域，尤其涉及一种OLED显示面板及显示装置。
 背景技术
有机发光二极管(Organic Light-Emitting Diode，OLED)因其在固态照明和平板显示的方向拥有巨大的发展潜力而得到了学术界和产业界的极大关注，且随着OLED显示面板的蓬勃发展，柔性显示面板、可弯折显示面板等产品正走向兴盛。
然而，大量传递信号的金属走线会集成至OLED显示面板的下边缘处，在后端模组制程中进行弯折动作折叠并固定到OLED显示面板的背面，这样会带来一个比较严重的风险，即长时间弯折过程中产生的应力作用，使得该区域的金属走线应力集中，产生裂纹，且裂纹可延伸至金属走线的整个横截面，从而导致信号传递失败、画面出现异常等情况发生，无法保障OLED显示面板的良率，且不具备量产的可行性。
因此，需要提供一种新的OLED显示面板及显示装置，来解决上述技术问题。
 技术问题
本揭示提供一种OLED显示面板及显示装置，解决了现有的OLED显示面板及显示装置，在弯折时使得位于弯折区域的金属走线易应力集中，产生裂纹，从而导致信号传递失败、画面出现异常的技术问题。
 技术解决方案
为解决上述问题，本揭示提供的技术方案如下：
本揭示实施例提供一种OLED显示面板，包括：
显示区域，所述显示区域背部设置有第一背板；
绑定区域，位于所述显示区域背面，所述绑定区域表面设置有第二背板；以及
弯折区域，位于所述显示区域与所述绑定区域之间，所述弯折区域内设置有金属走线；
所述弯折区域弯折至所述绑定区域内时，所述金属走线产生拉应力区域与压应力区域，在所述金属走线上分布有多个过孔，其中对应所述拉应力区域的所述过孔的分布密度与对应所述压应力区域的所述过孔的分布密度不同。
在本揭示实施例提供的OLED显示面板中，对应所述拉应力区域的所述过孔的分布密度大于对应所述压应力区域的所述过孔的分布密度。
在本揭示实施例提供的OLED显示面板中，处于弯折状态的所述弯折区域为半圆弧形。
在本揭示实施例提供的OLED显示面板中，所述过孔的中心线相交于一点或多个点。
在本揭示实施例提供的OLED显示面板中，处于弯折状态的所述弯折区域为非半圆弧形。
在本揭示实施例提供的OLED显示面板中，所述弯折区域包括第一弯折区域、第二弯折区域及第三弯折区域，所述第二弯折区域靠近所述显示区域，所述第三弯折区域靠近所述绑定区域，所述第一弯折区域位于所述第二弯折区域与所述第三弯折区域之间，所述第一弯折区域为半圆弧形，其中所述OLED显示面板的中心线与所述弯折区域的弯折顶点重合。
在本揭示实施例提供的OLED显示面板中，所述第一弯折区域内设置有所述过孔。
在本揭示实施例提供的OLED显示面板中，所述弯折区域包括第一弯折区域、第二弯折区域及第三弯折区域，所述第二弯折区域靠近所述显示区域，所述第三弯折区域靠近所述绑定区域，所述第一弯折区域位于所述第二弯折区域与所述第三弯折区域之间，所述第一弯折区域为半圆弧形，其中所述OLED显示面板的中心线与所述弯折区域的弯折顶点不重合，且所述第三弯折区域的长度小于所述第二弯折区域的长度。
在本揭示实施例提供的OLED显示面板中，所述第一弯折区域及所述第三弯折区域内设置有所述过孔。
在本揭示实施例提供的OLED显示面板中，所述第一背板与所述第二背板之间还设置有补强板。
本揭示实施例提供一种OLED显示面板，包括：
显示区域；
绑定区域，位于所述显示区域背面；以及
弯折区域，位于所述显示区域与所述绑定区域之间，所述弯折区域内设置有金属走线；
所述弯折区域弯折至所述绑定区域内时，所述金属走线产生拉应力区域与压应力区域，在所述金属走线上分布有多个过孔，其中对应所述拉应力区域的所述过孔的分布密度与对应所述压应力区域的所述过孔的分布密度不同。
在本揭示实施例提供的OLED显示面板中，对应所述拉应力区域的所述过孔的分布密度大于对应所述压应力区域的所述过孔的分布密度。
在本揭示实施例提供的OLED显示面板中，处于弯折状态的所述弯折区域为半圆弧形。
在本揭示实施例提供的OLED显示面板中，所述过孔的中心线相交于一点或多个点。
在本揭示实施例提供的OLED显示面板中，处于弯折状态的所述弯折区域为非半圆弧形。
在本揭示实施例提供的OLED显示面板中，所述弯折区域包括第一弯折区域、第二弯折区域及第三弯折区域，所述第二弯折区域靠近所述显示区域，所述第三弯折区域靠近所述绑定区域，所述第一弯折区域位于所述第二弯折区域与所述第三弯折区域之间，所述第一弯折区域为半圆弧形，其中所述OLED显示面板的中心线与所述弯折区域的弯折顶点重合。
在本揭示实施例提供的OLED显示面板中，所述第一弯折区域内设置有所述过孔。
在本揭示实施例提供的OLED显示面板中，所述弯折区域包括第一弯折区域、第二弯折区域及第三弯折区域，所述第二弯折区域靠近所述显示区域，所述第三弯折区域靠近所述绑定区域，所述第一弯折区域位于所述第二弯折区域与所述第三弯折区域之间，所述第一弯折区域为半圆弧形，其中所述OLED显示面板的中心线与所述弯折区域的弯折顶点不重合，且所述第三弯折区域的长度小于所述第二弯折区域的长度。
在本揭示实施例提供的OLED显示面板中，所述第一弯折区域及所述第三弯折区域内设置有所述过孔。
本揭示实施例提供一种显示装置，包括上述OLED显示面板。
 有益效果
本揭示的有益效果为：本揭示提供的OLED显示面板及显示装置，将位于弯折区域的金属走线内对应不同应力分布有不同密度的过孔，有效缓解应力，减少金属走线裂纹导致的失效不良等问题，提升了良率，降低了工艺难度，且可使OLED显示面板的可弯折角度更小，实现更窄边框，为局部变薄提供了有利条件。
 附图说明
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是揭示的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本揭示实施例提供的第一种OLED显示面板的弯折区域的过孔分布结构示意图；
图2A-图2C为图1中的OLED显示面板的弯折区域的过孔密度示意图；
图3A为图1中的OLED显示面板的弯折区域展开状态的一种过孔分布结构示意图；
图3B为图3A中OLED显示面板的弯折区域弯曲状态的过孔分布结构示意图；
图4A为图1中的OLED显示面板的弯折区域展开状态的另一种过孔分布结构示意图；
图4B为图4A中OLED显示面板的弯折区域弯曲状态的过孔分布结构示意图；
图5为本揭示实施例提供的第二种OLED显示面板的弯折区域的过孔分布结构示意图；
图6为本揭示实施例提供的第三种OLED显示面板的弯折区域的过孔分布结构示意图；
图7为本揭示实施例提供的第四种OLED显示面板的弯折区域的过孔分布结构示意图。
 本发明的实施方式
以下各实施例的说明是参考附加的图示，用以例示本揭示可用以实施的特定实施例。本揭示所提到的方向用语，例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本揭示，而非用以限制本揭示。在图中，结构相似的单元是用以相同标号表示。
本揭示针对现有技术的OLED显示面板及显示装置，在弯折时使得位于弯折区域的金属走线易应力集中，产生裂纹，从而导致信号传递失败、画面出现异常，本实施例能够解决该缺陷。
实施例一
如图1所示为本揭示实施例一提供的OLED显示面板，包括显示区域10、位于所述显示区域10背面的绑定区域20以及位于所述显示区域10与所述绑定区域20之间的弯折区域30，其中所述显示区域10用于显示图像，所述显示区域10还包括阵列基板，所述阵列基板包括阵列分布的薄膜晶体管器件层，所述薄膜晶体管器件层表面对应设置有OLED器件层；所述显示区域10背部设置有第一背板40，所述第一背板40用以承载所述显示区域10。
所述弯折区域30内设置有金属走线；例如，所述金属走线为GOA电路走线，所述金属走线的一端延伸至所述显示区域10内，并连接所述薄膜晶体管器件层与所述OLED器件层；所述金属走线的相对另一端弯折至所述绑定区域20，所述绑定区域20表面设置有第二背板50，所述第二背板50用于支撑所述绑定区域20，其中所述绑定区域20内设置有柔性印刷电路板，所述金属走线的另一端连接所述柔性印刷电路板；所述第一背板40与所述第二背板50之间还设置有补强板60，用来提高所述OLED显示面板弯折后的整体稳定性。
在所述金属走线上分布有多个过孔70，当所述弯折区域30弯折至所述绑定区域20内时，所述金属走线产生拉应力区域301与压应力区域302，其中对应所述拉应力区域301的所述过孔70的分布密度与对应所述压应力区域302的所述过孔70的分布密度不同，在本揭示实施例中，对应所述拉应力区域301的所述过孔70的分布密度大于对应所述压应力区域302的所述过孔70的分布密度，需要说明的是，所述过孔70的分布密度定义为单位长度的所述弯折区域30内的所述过孔的面积，即所述过孔70的面积除于所述弯折区域30的长度；当每个所述过孔70的面积固定时，所述过孔70的分布密度即可简化为所述过孔70的数量或相邻两个所述过孔70之间的间距大小，其中所述过孔的分布密度可参考图2A、图2B及图2C。
如图2A所示，相邻两个所述过孔70之间的间距固定，均为d，且每个所述过孔70的面积固定，通过将所述拉应力区域301的所述过孔70的数量大于所述压应力区域302的所述过孔70的数量，使得所述拉应力区域301的所述过孔70的分布密度大于所述压应力区域302的所述过孔70的分布密度。
如图2B所示，每个所述过孔70的面积固定，通过将所述拉应力区域301的相邻两个所述过孔70之间的间距小于所述压应力区域302的相邻两个所述过孔70的间距，具体地，d1<d2<d3<d4<d5，使得所述拉应力区域301所述过孔70的分布密度大于所述压应力区域302的所述过孔70的分布密度。
如图2C所示，相邻两个所述过孔70的间距固定，均为d，通过将所述拉应力区域301的所述过孔70的面积大于所述压应力区域302的所述过孔70的面积，具体地，S1>S2>S3，使得所述拉应力区域301的所述过孔70的分布密度大于所述压应力区域302的所述过孔70的分布密度。
继续参考图1，所述弯折区域30为半圆弧形，也就是说所述弯折区域30仅包括一段圆弧，能够使得所述OLED显示面板的可弯折角度更小，进而获得更窄的边框，使局部变薄变得可能。具体地，位于所述弯折区域30两端的区域为所述拉应力区域301，位于所述弯折区域30中部的区域为所述压应力区域302，可以理解的，从力学分析中可知，位于所述弯折区域30的两端的所述拉应力区域301受到的弯曲应力较为严重，即此区域最易发生断裂，因此位于所述拉应力区域301的所述过孔70的分布密度大于位于所述压应力区域302的所述过孔70的分布密度，即弯曲应力较大的所述拉应力区域301对应的所述过孔70分布较密集，弯曲应力较小的所述压应力区域302对应的所述过孔70分布较稀疏，减小了各区域的弯曲应力，避免了应力集中，提高了所述OLED显示面板的弯折性能。
具体地，所述过孔70的分布方式可以统一有序，也可以无序。当所述弯折区域30为半圆弧形状时，所述过孔70的中心线可相交于一点，例如，如图3A、图3B所示，所述过孔70的中心线垂直于处于展开状态的所述弯折区域30，即所述过孔70的中心线垂直于处于弯折状态的所述弯折区域30的切线，当位于所述弯折区域30上的任意一点共享一个圆心时，各个所述过孔70的中心线可以相交于一点，也就是说，各个所述过孔70的中心线相交于所述弯折区域30的圆心处。
所述过孔70的中心线也可相交于多个点，例如，如图4A、图4B所示，所述过孔70的中心线与处于展开状态的所述弯折区域30之间呈一倾斜角，即各个所述过孔70的中心线相交于处于弯折状态的所述弯折区域30所形成的圆弧内的多个点。
可以理解的，所述过孔70的形状为但不限定于长方形，还可以为正方形、圆形、三角形、梯形或不规则的形状等中的一种或多种组合。
实施例二
当所述弯折区域30处于弯折状态时，所述弯折区域30不一定为半圆弧形态，所述弯折区域30也可为非半圆弧形态，也就是说，所述弯折区域30由多段圆弧组成。
在实施例一的基础上，如图5所示为本揭示实施例二提供的所述OLED显示面板的所述弯折区域30的所述过孔70分布结构示意图，在本实施例中，所述弯折区域30为对称结构，具体地，所述弯折区域30由多段圆弧构成，可经过所述弯折区域30的弯折顶点B作包含所述弯折顶点B的圆弧的曲率圆，所述曲率圆在竖直方向的直径将所述弯折区域30划分为第一弯折区域31、第二弯折区域32及第三弯折区域33，其中所述第二弯折区域32靠近所述显示区域10，所述第三弯折区域33靠近所述绑定区域20，所述第一弯折区域31位于所述第二弯折区域32与所述第三弯折区域33之间，其中所述第一弯折区域31为半圆弧形，所述OLED显示面板的中心线A-A与所述弯折顶点B重合，且所述弯折区域30相对于所述OLED显示面板的中心线A-A呈对称结构，即所述第二弯折区域32的长度等于所述第三弯折区域33的长度。
可以理解的，从力学分析中可知，所述第一弯折区域31为应力集中区域，在所述第一弯折区域31内的金属走线产生第一拉应力区域311与第一压应力区域312，所述第二弯折区域32与所述第三弯折区域33为应力平缓区域。为了减缓所述第一弯折区域31的应力集中，因此可将所述第一弯折区域31设置有所述过孔70，即按照位于所述第一拉应力区域311的所述过孔70的分布密度大于位于所述第一压应力区域312的所述过孔70的分布密度对所述过孔70的分布进行设计，其中所述过孔70的具体分布结构可参考实施例一，在此不再赘述。另外，所述第二弯折区域32与所述第三弯折区域33内可做分布所述过孔70也可不做分布所述过孔70设计，本揭示实施例不应以此为限。
实施例三
在实施例二的基础上，如图6所示为本揭示实施例三提供的一种OLED显示面板的弯折区域的过孔分布结构示意图，与图5的相同点在于，所述弯折区域30由多段圆弧构成，且所述OLED显示面板的中心线A-A与所述弯折区域30的弯折顶点B重合；与图5的区别在于，在本实施例中，所述弯折区域30为非对称结构，同样地，可经过所述弯折顶点B包含所述弯折顶点B的圆弧的曲率圆，所述曲率圆在竖直方向的直径将所述弯折区域30划分为第一弯折区域31、第二弯折区域32及第三弯折区域33，所述第三弯折区域33的长度小于所述第二弯折区域32的长度。
可以理解地，从力学分析中可知，仅有所述第一弯折区域31为应力集中区域，在所述第一弯折区域31内产生0拉应力区域301与0压应力区域302，所述第二弯折区域32与所述第三弯折区域33为应力平缓区域，为了减缓所述第一弯折区域31的应力集中，因此可将所述第一弯折区域31设置有所述过孔70，即按照位于所述0拉应力区域301的所述过孔70的分布密度大于位于所述0压应力区域302的所述过孔70的分布密度对所述过孔70的分布进行设计，其中所述过孔70的具体分布结构可参考实施例一，在此不再赘述。另外，所述第二弯折区域32与所述第三弯折区域33内可做分布所述过孔70也可不做分布所述过孔70设计，也未对所述第二弯折区域32与所述第三弯折区域33设置的所述过孔70的分布密度作具体的限定，本揭示实施例不应以此为限。
实施例四
在实施例一的基础上，如图7所示为本揭示实施例四提供的一种OLED显示面板的弯折区域的过孔分布结构示意图，与图5的区别在于，所述OLED显示面板的中心线A-A与所述弯折区域30的弯折顶点B不重合，即所述弯折区域30为非对称结构。可经过所述弯折顶点B作包含所述弯折顶点B的圆弧的曲率圆，所述曲率圆在竖直方向的直径将所述弯折区域30划分为第一弯折区域31、第二弯折区域32及第三弯折区域33，所述第二弯折区域32靠近所述显示区域10，所述第三弯折区域33靠近所述绑定区域20，所述第一弯折区域31位于所述第二弯折区域32与所述第三弯折区域33之间，所述第一弯折区域31为半圆弧形，其中所述OLED显示面板的中心线A-A与所述弯折区域30的所述弯折顶点B不重合，且所述第三弯折区域33的长度小于所述第二弯折区域32的长度，所述弯折区域30的所述弯折顶点B位于所述第一弯折区域31内。
可以理解地，从力学分析中可知，所述第一弯折区域31的应力较为集中，在所述第一弯折区域31内产生所述0拉应力区域301与所述压应力区域302；又由于所述第二弯折区域32的长度大于所述第三弯折区域33的长度，导致所述第三弯折区域33的应力分布相比所述第二弯折区域较为集中，因此在所述第一弯折区域31与所述第三弯折区域32按照所述金属走线受到的应力状况进行设置所述过孔70，即按照位于所述拉应力区域301的所述过孔70的分布密度大于位于所述压应力区域302的所述过孔70的分布密度，同时根据所述第三弯折区域内收到的实际应力状况对所述过孔70的分布进行设计，其中所述过孔70的具体分布结构可参考实施例一，在此不再赘述。另外，所述第二弯折区域32内可做分布所述过孔70也可不做分布所述过孔70设计，也未对所述第二弯折区域32设置的所述过孔70的分布密度作具体的限定，本揭示实施例不应以此为限。
当然，当所述第二弯折区域32的长度小于所述第三弯折区域33的长度时，则所述第二弯折区域32的应力分布相比所述第三弯折区域33较为集中，因此可将所述第二弯折区域32的金属走线按照金属走线受到的应力状况进行设置所述过孔70，在此不再一一赘述。
实施例五
本揭示实施例还提供一种显示装置，所述显示装置包括所述OLED显示面板，所述显示装置所具有的技术效果与所述OLED显示面板所具有的技术效果相同，可参考上述实施例，在此不再赘述。
有益效果为：本揭示实施例提供的OLED显示面板及显示装置，将位于弯折区域的金属走线内对应不同应力分布有不同密度的过孔，有效缓解应力，减少金属走线裂纹导致的失效不良等问题，提升了良率，降低了工艺难度，且可使OLED显示面板的可弯折角度更小，实现更窄边框，为局部变薄提供了有利条件。
综上所述，虽然本揭示已以优选实施例揭露如上，但上述优选实施例并非用以限制本揭示，本领域的普通技术人员，在不脱离本揭示的精神和范围内，均可作各种更动与润饰，因此本揭示的保护范围以权利要求界定的范围为准。

Claims (20)

  1. 一种OLED显示面板，包括：
    显示区域，所述显示区域背部设置有第一背板；
    绑定区域，位于所述显示区域背面，所述绑定区域表面设置有第二背板；以及
    弯折区域，位于所述显示区域与所述绑定区域之间，所述弯折区域内设置有金属走线；
    所述弯折区域弯折至所述绑定区域内时，所述金属走线产生拉应力区域与压应力区域，在所述金属走线上分布有多个过孔，其中对应所述拉应力区域的所述过孔的分布密度与对应所述压应力区域的所述过孔的分布密度不同。
  2. 根据权利要求1所述的OLED显示面板，其中对应所述拉应力区域的所述过孔的分布密度大于对应所述压应力区域的所述过孔的分布密度。
  3. 根据权利要求1所述的OLED显示面板，其中处于弯折状态的所述弯折区域为半圆弧形。
  4. 根据权利要求3所述的OLED显示面板，其中所述过孔的中心线相交于一点或多个点。
  5. 根据权利要求1所述的OLED显示面板，其中处于弯折状态的所述弯折区域为非半圆弧形。
  6. 根据权利要求5所述的OLED显示面板，其中所述弯折区域包括第一弯折区域、第二弯折区域及第三弯折区域，所述第二弯折区域靠近所述显示区域，所述第三弯折区域靠近所述绑定区域，所述第一弯折区域位于所述第二弯折区域与所述第三弯折区域之间，所述第一弯折区域为半圆弧形，其中所述OLED显示面板的中心线与所述弯折区域的弯折顶点重合。
  7. 根据权利要求6所述的OLED显示面板，其中所述第一弯折区域内设置有所述过孔。
  8. 根据权利要求5所述的OLED显示面板，其中所述弯折区域包括第一弯折区域、第二弯折区域及第三弯折区域，所述第二弯折区域靠近所述显示区域，所述第三弯折区域靠近所述绑定区域，所述第一弯折区域位于所述第二弯折区域与所述第三弯折区域之间，所述第一弯折区域为半圆弧形，其中所述OLED显示面板的中心线与所述弯折区域的弯折顶点不重合，且所述第三弯折区域的长度小于所述第二弯折区域的长度。
  9. 根据权利要求8所述的OLED显示面板，其中所述第一弯折区域及所述第三弯折区域内设置有所述过孔。
  10. 根据权利要求1所述的OLED显示面板，其中所述第一背板与所述第二背板之间还设置有补强板。
  11. 一种OLED显示面板，包括：
    显示区域；
    绑定区域，位于所述显示区域背面；以及
    弯折区域，位于所述显示区域与所述绑定区域之间，所述弯折区域内设置有金属走线；
    所述弯折区域弯折至所述绑定区域内时，所述金属走线产生拉应力区域与压应力区域，在所述金属走线上分布有多个过孔，其中对应所述拉应力区域的所述过孔的分布密度与对应所述压应力区域的所述过孔的分布密度不同。
  12. 根据权利要求11所述的OLED显示面板，其中对应所述拉应力区域的所述过孔的分布密度大于对应所述压应力区域的所述过孔的分布密度。
  13. 根据权利要求11所述的OLED显示面板，其中处于弯折状态的所述弯折区域为半圆弧形。
  14. 根据权利要求13所述的OLED显示面板，其中所述过孔的中心线相交于一点或多个点。
  15. 根据权利要求11所述的OLED显示面板，其中处于弯折状态的所述弯折区域为非半圆弧形。
  16. 根据权利要求15所述的OLED显示面板，其中所述弯折区域包括第一弯折区域、第二弯折区域及第三弯折区域，所述第二弯折区域靠近所述显示区域，所述第三弯折区域靠近所述绑定区域，所述第一弯折区域位于所述第二弯折区域与所述第三弯折区域之间，所述第一弯折区域为半圆弧形，其中所述OLED显示面板的中心线与所述弯折区域的弯折顶点重合。
  17. 根据权利要求16所述的OLED显示面板，其中所述第一弯折区域内设置有所述过孔。
  18. 根据权利要求15所述的OLED显示面板，其中所述弯折区域包括第一弯折区域、第二弯折区域及第三弯折区域，所述第二弯折区域靠近所述显示区域，所述第三弯折区域靠近所述绑定区域，所述第一弯折区域位于所述第二弯折区域与所述第三弯折区域之间，所述第一弯折区域为半圆弧形，其中所述OLED显示面板的中心线与所述弯折区域的弯折顶点不重合，且所述第三弯折区域的长度小于所述第二弯折区域的长度。
  19. 根据权利要求18所述的OLED显示面板，其中所述第一弯折区域及所述第三弯折区域内设置有所述过孔。
  20. 一种显示装置，包括权利要求11所述的OLED显示面板。
PCT/CN2019/111616 2019-06-18 2019-10-17 Oled 显示面板及显示装置 Ceased WO2020253000A1 (zh)

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