WO2022227446A1 - 显示装置及其显示面板 - Google Patents

显示装置及其显示面板 Download PDF

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Publication number
WO2022227446A1
WO2022227446A1 PCT/CN2021/126481 CN2021126481W WO2022227446A1 WO 2022227446 A1 WO2022227446 A1 WO 2022227446A1 CN 2021126481 W CN2021126481 W CN 2021126481W WO 2022227446 A1 WO2022227446 A1 WO 2022227446A1
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Prior art keywords
display panel
opening
sub
layer
openings
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PCT/CN2021/126481
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English (en)
French (fr)
Inventor
詹裕程
李栓柱
羊振中
Original Assignee
京东方科技集团股份有限公司
成都京东方光电科技有限公司
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Publication of WO2022227446A1 publication Critical patent/WO2022227446A1/zh

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    • 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
    • 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

Definitions

  • the present invention relates to the technical field of display devices, and in particular, to a display device and a display panel thereof.
  • organic light-emitting diode Organic Light-Emitting Diode
  • OLED Organic Light-Emitting Diode
  • the present invention provides a display device and a display panel thereof to solve the deficiencies in the related art.
  • a first aspect of the embodiments of the present invention provides a display panel, comprising a display area and a stretchable area located at at least one corner area of the display area, the stretchable area is provided with a plurality of The first openings are staggered from each other.
  • the cross section of the first opening in the direction perpendicular to the thickness of the display panel is elongated, and the edge of the stretchable area away from the display area includes an arc-shaped edge, and the first opening is in the shape of a strip.
  • the direction of extension is perpendicular to the arc edge.
  • the display panel includes a dam, a cross section of the first opening perpendicular to a thickness direction of the display panel is elongated, and an extending direction of the first opening is perpendicular to an extending direction of the dam.
  • a cross section of the first opening in a direction perpendicular to the thickness of the display panel is rectangular, wavy or sawtooth.
  • the first opening penetrates the entire thickness or part of the thickness of the display panel.
  • the first opening includes a first sub-aperture and a second sub-aperture in the thickness direction of the display panel, and an organic layer is formed between the first sub-aperture and the second sub-aperture.
  • the axes of symmetry of the first sub-aperture and the second sub-aperture are coincident.
  • the stretchable region includes an organic substrate, and a first gate insulating layer, a second gate insulating layer, an interlayer insulating layer, a first passivation layer, and a first gate insulating layer, which are sequentially stacked on the organic substrate.
  • a planarization layer the first opening penetrates the first gate insulating layer, the second gate insulating layer, the interlayer insulating layer, the first passivation layer and the first planarization layer chemical layer.
  • the first planarization layer is provided with a first groove near the first opening, and the first planarization layer outside the first groove is on a side away from the organic substrate
  • a second passivation layer is provided; the second passivation layer includes a first section close to the first opening and a second section far away from the first opening, the first section covering all the entire sidewall of the first planarization layer.
  • the display panel includes an organic substrate, and the first opening penetrates the entire thickness or part of the thickness of the organic substrate.
  • the display area includes alternately arranged pixel structure areas and wiring areas, and there are second openings between adjacent pixel structure areas and the wiring areas.
  • the second opening penetrates the entire thickness or part of the thickness of the display panel.
  • the second opening includes a third sub-aperture and a fourth sub-aperture in the thickness direction of the display panel, and an organic layer is formed between the third sub-aperture and the fourth sub-aperture.
  • the axis of symmetry of the third sub-aperture and the fourth sub-aperture coincides.
  • the display panel includes an organic substrate, and the second opening penetrates the entire thickness or part of the thickness of the organic substrate.
  • the density of the first openings is greater than the density of the second openings.
  • a second aspect of the embodiments of the present invention provides a display device, including: the display panel described in any one of the above.
  • the inventors analyzed and found that the reason is that the stretchable regions located in the corner regions are provided with multiple organic film layers and inorganic film layers, and there is a compressive stress between them. When the compressive stress cannot be released, it accumulates and causes wavy folds.
  • a plurality of first openings are arranged in the stretchable area to remove the organic film layer and inorganic film layer in a part of the area to form a stress release space, thereby solving the problem of wavy wrinkles.
  • FIG. 1 is a top view of a display panel according to a first embodiment of the present invention
  • Fig. 2 is an enlarged view of the Q region in Fig. 1;
  • FIG. 3 is a cross-sectional view of the display area in FIG. 2 along the thickness direction of the display panel;
  • FIG. 4 is a cross-sectional view of the stretchable region in FIG. 2 along the thickness direction of the display panel;
  • FIG. 5 is a schematic structural diagram of the display panel in FIG. 4 in a manufacturing process
  • FIG. 6 is a top view of a partial area of a display panel according to a second embodiment of the present invention.
  • FIG. 7 is a cross-sectional view of the stretchable region in FIG. 6 along the thickness direction of the display panel;
  • FIG. 8 is a cross-sectional view of the stretchable region of the display panel according to the third embodiment of the present invention along the thickness direction of the display panel;
  • FIG. 9 is a schematic structural diagram of the display panel in FIG. 8 in a manufacturing process
  • FIG. 10 is a cross-sectional view of the stretchable region of the display panel according to the fourth embodiment of the present invention along the thickness direction of the display panel;
  • FIG. 11 is a schematic structural diagram of the display panel in FIG. 10 in a manufacturing process
  • FIG. 12 is a top view of a partial area of a display panel according to a fifth embodiment of the present invention.
  • FIG. 13 is a cross-sectional view of the display area in FIG. 12 along the thickness direction of the display panel.
  • the first opening H1 The second opening H2
  • the first gate insulating layer GI1 The first gate insulating layer GI1
  • Gate 13 The second gate insulating layer GI2
  • Organic encapsulation layer 172 Second inorganic encapsulation layer 173
  • the second sub-hole H12 The placeholder material layer 30
  • the second passivation layer PVX2 The second passivation layer PVX2
  • FIG. 1 is a top view of a display panel according to a first embodiment of the present invention
  • FIG. 2 is an enlarged view of the Q area in FIG. 1 .
  • the display panel 1 includes a display area M and a stretchable area P located at at least one corner area of the display area M, and a plurality of first openings H1 are arranged in the stretchable area P,
  • the first openings H1 are staggered from each other. In other words, the respective first openings H1 do not overlap each other.
  • the display panel 1 may have four corner regions, and each corner region has a stretchable region P. As shown in FIG. 1 , the display panel 1 may have four corner regions, and each corner region has a stretchable region P. As shown in FIG. 1 , the display panel 1 may have four corner regions, and each corner region has a stretchable region P. As shown in FIG. 1 , the display panel 1 may have four corner regions, and each corner region has a stretchable region P. As shown in FIG.
  • the cross section of the first opening H1 in the thickness direction perpendicular to the display panel 1 is elongated, and the edge S of the stretchable area P away from the display area M includes an arc-shaped edge S,
  • the extending direction of an opening H1 is perpendicular to the arc edge S.
  • the cross section of the first opening H1 in the thickness direction perpendicular to the display panel 1 is rectangular.
  • the cross section of the first opening H1 in the thickness direction perpendicular to the display panel 1 may also be wavy or zigzag.
  • the corners of the rectangular cross-section may be rounded.
  • the cross section of the first opening H1 in the thickness direction perpendicular to the display panel 1 may also be in the shape of a circle, an ellipse, a rhombus, or the like.
  • the display area M of the display panel 1 includes a pixel structure area M1 and a wiring area M2 arranged alternately.
  • FIG. 3 is a cross-sectional view of the display area in FIG. 2 along the thickness direction of the display panel.
  • the pixel structure region M1 is provided with a plurality of pixel structures 16 arranged in an array.
  • Each pixel structure 16 includes an anode 16a, a cathode 16c, and an OLED light-emitting block 16b disposed between the anode 16a and the cathode 16c.
  • the OLED light-emitting block 16b may be red, green or blue, and may also be red, green, blue or yellow.
  • the pixel structures 16 of three primary colors of red, green and blue or four primary colors of red, green, blue and yellow are alternately distributed.
  • a pixel driving circuit is disposed between the anode 16a and the organic substrate 10, the pixel driving circuit includes a plurality of transistors, and the anode 16a is electrically connected to the source of a transistor.
  • the pixel structure 16 is an OLED (Active Matrix OLED, AMOLED) that is actively driven to emit light.
  • Active-driven light-emitting mode OLED also known as active-driven light-emitting mode OLED, uses a transistor array to control each pixel to emit light, and each pixel can emit light continuously. That is, the addressing of each pixel structure 16 is directly controlled by the transistor array.
  • the transistors in the pixel driving circuit include: an active layer 12, a first gate insulating layer GI1, a gate electrode 13, a second gate insulating layer GI2, a source electrode 14a and a drain electrode 14b.
  • the active layer 12 includes a source region, a drain region, and a channel region between the source region and the drain region.
  • the first gate insulating layer GI1 and the second gate insulating layer GI2 are provided on the entire surface of the display area M.
  • An interlayer dielectric layer ILD is disposed on the entire surface of the second gate insulating layer GI2 away from the organic substrate 10 .
  • a source electrode 14 a and a drain electrode 14 b are disposed on the side of the interlayer dielectric layer ILD away from the organic substrate 10 .
  • the source electrode 14a and the drain electrode 14b are respectively connected to the source region and the drain region through corresponding conductive plugs.
  • a first passivation layer PVX1 is disposed on the entire surface of the source electrode 14 a , the drain electrode 14 b and the side of the interlayer dielectric layer ILD away from the organic substrate 10 .
  • a first planarization layer PLN1 is disposed on the entire surface of one side of the first passivation layer PVX1 away from the organic substrate 10 .
  • a source transfer electrode 15 a and a drain transfer electrode 15 b are provided on the side of the first planarization layer PLN1 away from the organic substrate 10 .
  • the source transfer electrode 15a and the drain transfer electrode 15b are respectively connected to the source electrode 14a and the drain electrode 14b through corresponding conductive plugs.
  • a second planarization layer PLN2 is disposed on the entire surface of the source transfer electrode 15a, the drain transfer electrode 15b and the side of the first planarization layer PLN1 away from the organic substrate 10 .
  • Several anodes 16a are disposed on the second planarization layer PLN2.
  • the anode 16a is connected to the source via electrode 15a through corresponding conductive plugs.
  • a pixel definition layer PDL is provided on the side of the anode 16a and the second planarization layer PLN2 away from the organic substrate 10 .
  • the pixel definition layer PDL has an opening exposing a partial region of the anode 16a.
  • the OLED light-emitting block 16b is located in the opening of the pixel definition layer PDL.
  • the cathode 16c is located on the side of the OLED light-emitting block 16b away from the organic substrate 10 .
  • the cathodes 16c of the respective pixel structures 16 may be connected together to form a surface electrode.
  • the encapsulation layer includes a first inorganic encapsulation layer 171 , a second inorganic encapsulation layer 173 , and an organic encapsulation layer 172 between the first inorganic encapsulation layer 171 and the second inorganic encapsulation layer 173 .
  • the active layer 12 is close to the organic substrate 10 , and the gate electrode 13 is far away from the organic substrate 10 . Therefore, the transistor has a top-gate structure. In other embodiments, the transistor may also have a bottom gate structure, and the gate 13 is close to the organic substrate 10 relative to the active layer 12 .
  • the first passivation layer PVX1 may also be located on a side of the second planarization layer PLN2 away from the organic substrate 10 . In some embodiments, the first passivation layer PVX1 may also not be included. In some embodiments, the second planarization layer PLN2 or the first planarization layer PLN1 may also not be included.
  • the pixel structure 16 may also be a passively driven light-emitting OLED. At this time, the pixel structure region M1 has no pixel driving circuit.
  • the material of the organic substrate 10 may be polyimide.
  • a buffer layer 11 may be provided on the entire surface of the organic substrate 10 .
  • the material of the buffer layer 11 can be silicon dioxide, silicon nitride, silicon oxynitride, etc., to prevent water vapor from diffusing upward from the organic substrate 10 to each film layer.
  • the wiring area M2 may be provided with a gate line WL, a data line (not shown) and a power line (not shown), etc., which are connected to the transistors of each pixel structure area M1 Wire.
  • the gate line WL may be located on the same layer as the gate electrode 13 .
  • the gate lines WL disposed in the wiring region M2 and the gate electrodes 13 of the transistors in the pixel structure region M1 can be fabricated simultaneously.
  • the data line and the power line are arranged in parallel, and may be located on the same layer as the source electrode 14a and the drain electrode 14b.
  • the data lines and power lines disposed in the wiring region M2 and the source electrodes 14a and the drain electrodes 14b of the transistors in the pixel structure region M1 can be fabricated simultaneously.
  • FIG. 4 is a cross-sectional view of the stretchable region in FIG. 2 along the thickness direction of the display panel.
  • FIG. 5 is a schematic structural diagram of the display panel in FIG. 4 in the manufacturing process.
  • the organic substrate 10 is carried on a carrier 2 such as a glass substrate.
  • a plurality of first openings H1 are formed in the stretchable region P. As shown in FIG. 5 , after the pixel driving circuit and the pixel structure 16 are fabricated, a plurality of first openings H1 are formed in the stretchable region P. As shown in FIG. 5 , after the pixel driving circuit and the pixel structure 16 are fabricated, a plurality of first openings H1 are formed in the stretchable region P. As shown in FIG. 5 , after the pixel driving circuit and the pixel structure 16 are fabricated, a plurality of first openings H1 are formed in the stretchable region P. As shown in FIG.
  • the length of the first opening H1 may range from 250 ⁇ m to 400 ⁇ m, and the width may range from 8 ⁇ m to 12 ⁇ m.
  • the distance between the centers of the adjacent first openings H1 may range from 300 ⁇ m to 500 ⁇ m.
  • the numerical range includes the endpoint value and the floating value above and below the endpoint value within the range of process and measurement errors.
  • the setting of the first opening H1 is equivalent to removing the organic film layer and the inorganic film layer in a part of the area, so that a stress release space can be formed, thereby solving the problem of wavy wrinkles.
  • the first opening H1 penetrates through the organic substrate 10 , and the buffer layer 11 , the first gate insulating layer GI1 , the second gate insulating layer GI2 , the interlayer insulating layer ILD, and the first passivation layer are sequentially stacked on the organic substrate 10 .
  • the first opening H1 can cut off the first inorganic encapsulation layer 171 and the second inorganic encapsulation layer 173 due to the large aspect ratio. That is, in this embodiment, the first opening H1 penetrates the entire display panel 1 . thickness.
  • the organic encapsulation layer 172 can be controlled by the area of the printing process, and is not disposed in the stretchable area P.
  • the first planarization layer PLN1 is provided with a first groove near the first opening H1.
  • the first groove can increase the path of water and oxygen entering the pixel structure region M1 from the first opening H1.
  • a second passivation layer PVX2 is disposed on the first planarization layer PLN1 outside the first groove.
  • the second passivation layer PVX2 includes a first section close to the first opening H1 and a second section away from the first opening H1.
  • the first section covers the entire sidewall of the first planarization layer PLN1 to further prevent water and oxygen from entering the first planarization layer PLN1 from the first opening H1.
  • the first inorganic encapsulation layer 171 is in direct contact with the second passivation layer PVX2.
  • the second section covers part of the surface of PLN1.
  • the carrier plate 2 is peeled off as shown in FIG. 4 .
  • FIG. 6 is a plan view of a partial area of a display panel according to a second embodiment of the present invention.
  • FIG. 7 is a cross-sectional view of the stretchable region in FIG. 6 along the thickness direction of the display panel.
  • the display panel 3 of this embodiment is substantially the same as the display panel 1 in FIGS. 1 to 5 , the only difference being that the display panel 3 includes a dam 20 , and the first opening H1 is perpendicular to the display panel.
  • the cross section in the thickness direction of 3 is elongated, and the extending direction of the first opening H1 is perpendicular to the extending direction of the bank 20 .
  • the side of the first planarization layer PLN1 away from the organic substrate 10 is sequentially provided with a second planarization layer PLN2 and a pixel definition layer PDL to increase the size of the bank 20 height.
  • the bank 20 may include at least one, and any one of the at least one may be composed of at least one of the first planarization layer PLN1 , the second planarization layer PLN2 and the pixel definition layer PDL.
  • a support layer disposed on one side of the pixel definition layer PDL may also be included, and the support layer may also constitute the bank 20 .
  • the first groove is disposed in the second planarization layer PLN2 near the first opening H1.
  • the second passivation layer PVX2 is disposed on the second planarization layer PLN2 outside the first groove.
  • the first section of the second passivation layer PVX2 covers the entire sidewalls of the second planarization layer PLN2 and the first planarization layer PLN1.
  • the first inorganic encapsulation layer 171 is in direct contact with the pixel definition layer PDL and the second passivation layer PVX2, respectively.
  • FIG. 8 is a cross-sectional view of a stretchable region of a display panel in a thickness direction of the display panel according to the third embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of the display panel in FIG. 8 in the manufacturing process.
  • the display panel of the present embodiment is substantially the same as the display panels 1 and 3 in FIGS.
  • the advantage is: as shown in FIG. 9 , when the encapsulation layer is fabricated, the organic substrate 10 at the bottom of the first opening H1 can isolate the first inorganic encapsulation layer 171 from the carrier 2 ; when the carrier 2 is peeled off, the first inorganic encapsulation layer can be avoided.
  • the bonding force between the 171 and the carrier plate 2 is relatively large, which causes the display panel to be incomplete and some organic or inorganic film layers to break.
  • the organic substrate 10 at the bottom of the first opening H1 may retain the entire thickness, or retain one or more film layer structures on the organic substrate 10 .
  • FIG. 10 is a cross-sectional view of a stretchable region of a display panel in a thickness direction of the display panel according to the fourth embodiment of the present invention.
  • the display panel of this embodiment is substantially the same as the display panel shown in FIGS. 8 to 9 , except that the first opening H1 includes a first sub-hole H11 and a second sub-hole H11 in the thickness direction of the display panel.
  • the sub-hole H12 an organic material layer is formed between the first sub-hole H11 and the second sub-hole H12, and the symmetry axes of the first sub-hole H11 and the second sub-hole H12 coincide.
  • the axis of symmetry of the first sub-hole H11 and the second sub-hole H12 is along the thickness direction of the display panel.
  • the advantage is that when the display panel is attached to other modules, for example, when the cover glass is attached, the first sub-hole H11 and the second sub-hole H12 respectively form buffer spaces above and below the organic material layer to improve the deformability , which can prevent excessive stress accumulation and cause breakage of the organic film layer or the inorganic film layer of the display panel.
  • the width of the first sub-hole H11 is smaller than the width of the second sub-hole H12. In other embodiments, the width of the first sub-hole H11 may be greater than or equal to the width of the second sub-hole H12. In some embodiments, the first sub-hole H11 and the second sub-hole H12 may partially overlap.
  • the organic material layer is a part of the thickness of the organic substrate. In other embodiments, the organic material layer may also be other organic film layers.
  • FIG. 11 is a schematic structural diagram of the display panel in FIG. 10 in the manufacturing process.
  • a placeholder material layer 30 may be formed on the carrier board 2 first.
  • the material of the placeholder material layer 30 may be silicon nitride, silicon dioxide, metal and other materials. After the carrier 2 is peeled off, the placeholder material layer 30 is attached to the carrier 2 .
  • FIG. 12 is a plan view of a partial area of a display panel according to a fifth embodiment of the present invention.
  • FIG. 13 is a cross-sectional view of the display area in FIG. 12 along the thickness direction of the display panel.
  • the display panel 4 of this embodiment is substantially the same as the display surface in FIGS. 1 to 11 , the only difference being that there is a second opening between the adjacent pixel structure area M1 and the wiring area M2 Hole H2.
  • the density of the second openings H2 may be smaller than the density of the first openings H1.
  • the density of the first openings H1 refers to the area of all the first openings H1 in a unit area.
  • the density of the second openings H2 refers to the area of all the number of the second openings H2 per unit area.
  • the setting of the second opening H2 can improve the deformability of the display panel when the display panel is bonded with other modules, for example, when the cover glass is bonded, and prevent the inorganic film layer or the organic film layer from being torn.
  • the second opening H2 may be formed in the same process as the first opening H1.
  • the second opening H2 may penetrate through the entire thickness or part of the thickness of the organic substrate 10 , or the entire thickness or part of the thickness of the display panel 4 .
  • the second opening H2 may include a third sub-aperture and a fourth sub-aperture in the thickness direction of the display panel 4 , and an organic material layer is located between the third sub-aperture and the fourth sub-aperture.
  • the axis of symmetry of the third sub-aperture coincides with that of the fourth sub-aperture.
  • the axis of symmetry of the third sub-hole and the fourth sub-hole is along the thickness direction of the display panel 4 .
  • the second planarization layer PLN2 is provided with a second groove near the second opening H2.
  • the second groove can disconnect the cathode surface electrode of subsequent vapor deposition, thereby increasing the path for water and oxygen to enter the pixel structure region M1 and the wiring region M2 from the second opening H2.
  • a second passivation layer PVX2 is disposed on the second planarization layer PLN2 outside the second groove.
  • the second passivation layer PVX2 includes a first section close to the second opening H2 and a second section away from the second opening H2.
  • the first section covers the entire sidewalls of the second planarization layer PLN2 and the first planarization layer PLN1 to further prevent water and oxygen from entering the first planarization layer PLN1 and the second planarization layer PLN2 from the second opening H2.
  • the first inorganic encapsulation layer 171 is in direct contact with the cathode surface electrode.
  • an embodiment of the present invention further provides a display device including any of the above-mentioned display panels.
  • the display device can be any product or component with display function, such as electronic paper, mobile phone, tablet computer, television, notebook computer, digital photo frame, and navigator.
  • first and second are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
  • severe refers to one, two or more, unless expressly limited otherwise.

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Abstract

本发明提供了一种显示装置及其显示面板，显示面板包括显示区和位于显示区的至少一个边角区域的可拉伸区，可拉伸区设置有多个第一开孔，各个第一开孔之间相互错开。根据本发明的实施例，通过在可拉伸区设置多个第一开孔，去除部分区域的有机膜层与无机膜层，形成应力释放空间，从而解决波浪形褶皱问题。

Description

显示装置及其显示面板 技术领域
本发明涉及显示设备技术领域，尤其涉及一种显示装置及其显示面板。
背景技术
与目前广泛应用的液晶、等离子显示器相比较，有机发光二极管(OrganicLight-Emitting Diode，OLED)器件因其自发光、色彩丰富、响应速度快、视角宽、重量轻、厚度薄、耗电少、可实现柔性显示等优点备受关注。现在，柔性OLED产品被广泛应用于手机、Notebook等产品中。
随着产品应用的多样化，可拉伸OLED产品在手机应用方面的客户需求逐渐提升。相关技术中，对于四边曲面OLED产品的可拉伸区域的结构设计依旧存在较大缺陷，可拉伸区的边角存在明显波浪形褶皱。
发明内容
本发明提供一种显示装置及其显示面板，以解决相关技术中的不足。
为实现上述目的，本发明实施例的第一方面提供一种显示面板，包括显示区和位于所述显示区的至少一个边角区域的可拉伸区，所述可拉伸区设置有多个第一开孔，各个所述第一开孔之间相互错开。
可选地，所述第一开孔在垂直所述显示面板的厚度方向的剖面呈长条状，所述可拉伸区远离所述显示区的边缘包括弧形边缘，所述第一开孔的延伸方向垂直所述弧形边缘。
可选地，所述显示面板包括堤坝，所述第一开孔在垂直所述显示面板的厚度方向的剖面呈长条状，所述第一开孔的延伸方向垂直所述堤坝的延伸方向。
可选地，所述第一开孔在垂直所述显示面板的厚度方向的剖面呈矩形、波浪形或锯齿形。
可选地，所述第一开孔贯穿所述显示面板的整个厚度或部分厚度。
可选地，所述第一开孔在所述显示面板的厚度方向包括第一子开孔与第二子开孔，所述第一子开孔与所述第二子开孔之间为有机材料层，所述第一子开孔与所述第二子开 孔的对称轴重合。
可选地，所述可拉伸区包括有机基底，以及依次堆叠于所述有机基底上的第一栅极绝缘层、第二栅极绝缘层、层间绝缘层、第一钝化层和第一平坦化层，所述第一开孔贯穿所述第一栅极绝缘层、所述第二栅极绝缘层、所述层间绝缘层、所述第一钝化层和所述第一平坦化层。
可选地，所述第一平坦化层在靠近所述第一开孔处设置有第一凹槽，所述第一凹槽外的所述第一平坦化层远离所述有机基底的一侧设置有第二钝化层；所述第二钝化层包括靠近所述第一开孔的第一区段与远离所述第一开孔的第二区段，所述第一区段覆盖所述第一平坦化层的整个侧壁。
可选地，所述显示面板包括有机基底，所述第一开孔贯穿所述有机基底的整个厚度或部分厚度。
可选地，所述显示区包括交替设置的像素结构区与走线区，相邻所述像素结构区与所述走线区之间具有第二开孔。
可选地，所述第二开孔贯穿所述显示面板的整个厚度或部分厚度。
可选地，所述第二开孔在所述显示面板的厚度方向包括第三子开孔与第四子开孔，所述第三子开孔与所述第四子开孔之间为有机材料层，所述第三子开孔与所述第四子开孔的对称轴重合。
可选地，所述显示面板包括有机基底，所述第二开孔贯穿所述有机基底的整个厚度或部分厚度。
可选地，所述第一开孔的密度大于所述第二开孔的密度。
本发明实施例的第二方面提供一种显示装置，包括：上述任一项所述的显示面板。
对于相关技术中的波浪形褶皱问题，发明人进行了分析，发现产生的原因在于：位于边角区域的可拉伸区设置有多层有机膜层与无机膜层，相互之间存在压缩应力。当压缩应力无法释放，积累起来会造成波浪形褶皱。
基于上述分析，本发明的上述实施例中，通过在可拉伸区设置多个第一开孔，去除部分区域的有机膜层与无机膜层，形成应力释放空间，从而解决波浪形褶皱问题。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本发明。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本发明的实施例，并与说明书一起用于解释本发明的原理。
图1是本发明第一实施例的显示面板的俯视图；
图2是图1中的Q区域的放大图；
图3是图2中的显示区在沿显示面板的厚度方向的剖面图；
图4是图2中的可拉伸区在沿显示面板的厚度方向的剖面图；
图5是图4中的显示面板在制作过程中的结构示意图；
图6是本发明第二实施例的显示面板的局部区域的俯视图；
图7是图6中的可拉伸区在沿显示面板的厚度方向的剖面图；
图8是本发明第三实施例的显示面板的可拉伸区在沿显示面板的厚度方向的剖面图；
图9是图8中的显示面板在制作过程中的结构示意图；
图10是本发明第四实施例的显示面板的可拉伸区在沿显示面板的厚度方向的剖面图；
图11是图10中的显示面板在制作过程中的结构示意图；
图12是本发明第五实施例的显示面板的局部区域的俯视图；
图13是图12中的显示区在沿显示面板的厚度方向的剖面图。
附图标记列表：
显示面板1、3、4                       可拉伸区P
边缘S                                 显示区M
第一开孔H1                            第二开孔H2
像素结构区M1                          走线区M2
有机基底10                            缓冲层11
有源层12                              第一栅极绝缘层GI1
栅极13                                第二栅极绝缘层GI2
源极14a                               漏极14b
层间介质层ILD                        第一钝化层PVX1
第一平坦化层PLN1                     源极转接电极15a
漏极转接电极15b                      第二平坦化层PLN2
像素定义层PDL                        若干像素结构16
阳极16a                              OLED发光块16b
阴极16c                              第一无机封装层171
有机封装层172                        第二无机封装层173
栅极线WL                             载板2
堤坝20                               第一子开孔H11
第二子开孔H12                        占位材料层30
第二钝化层PVX2
具体实施方式
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本发明相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本发明的一些方面相一致的装置和方法的例子。
图1是本发明第一实施例的显示面板的俯视图；图2是图1中的Q区域的放大图。
参照图1与图2所示，显示面板1包括显示区M和位于显示区M的至少一个边角区域的可拉伸区P，可拉伸区P内设置有多个第一开孔H1，各个第一开孔H1之间相互错开。换言之，各个第一开孔H1相互之间不交叠。
参照图1所示，显示面板1可以具有四个边角区域，每个边角区域具有一个可拉伸区P。
本实施例中，参照图2所示，第一开孔H1在垂直显示面板1的厚度方向的剖面呈长条状，可拉伸区P远离显示区M的边缘S包括弧形边缘S，第一开孔H1的延伸方向垂直弧形边缘S。具体地，第一开孔H1在垂直显示面板1的厚度方向的剖面呈矩形。其它实施例中，第一开孔H1在垂直显示面板1的厚度方向的剖面也可以呈波浪形或锯齿形。在一些实施例中，矩形剖面的角可以是倒圆角。
其它实施例中，第一开孔H1在垂直显示面板1的厚度方向的剖面也可以呈圆形、 椭圆形、菱形等。
参照图2所示，本实施例中，显示面板1的显示区M包括交替设置的像素结构区M1与走线区M2。
图3是图2中的显示区在沿显示面板的厚度方向的剖面图。
参照图3所示，像素结构区M1设置有阵列式排布的若干像素结构16。每一像素结构16包括：阳极16a、阴极16c以及设置于阳极16a与阴极16c之间的OLED发光块16b。OLED发光块16b可以为红、绿或蓝，也可以为红、绿、蓝或黄。红绿蓝三基色或红绿蓝黄四基色的像素结构16交替分布。
参照图3所示，本实施例中，阳极16a与有机基底10之间设置有像素驱动电路，像素驱动电路包括若干晶体管，阳极16a与一晶体管的源极电连接。换言之，像素结构16为主动驱动发光方式OLED(Active Matrix OLED，AMOLED)。
主动驱动发光方式OLED，也称有源驱动发光方式OLED，是采用晶体管阵列控制每个像素发光，且每个像素可以连续发光。即，每个像素结构16的寻址直接受控于晶体管阵列。
像素驱动电路中的晶体管包括：有源层12、第一栅极绝缘层GI1、栅极13、第二栅极绝缘层GI2、源极14a以及漏极14b。有源层12包括源区、漏区以及位于源区与漏区之间的沟道区。第一栅极绝缘层GI1、第二栅极绝缘层GI2在显示区M都为整面设置。第二栅极绝缘层GI2远离有机基底10的一侧整面设置有层间介质层ILD。层间介质层ILD远离有机基底10的一侧设置有源极14a与漏极14b。源极14a与漏极14b分别通过对应导电插塞连接于源区与漏区。源极14a、漏极14b以及层间介质层ILD远离有机基底10的一侧整面设置有第一钝化层PVX1。第一钝化层PVX1远离有机基底10的一侧整面设置有第一平坦化层PLN1。第一平坦化层PLN1远离有机基底10的一侧设置有源极转接电极15a与漏极转接电极15b。源极转接电极15a与漏极转接电极15b分别通过对应导电插塞连接于源极14a与漏极14b。源极转接电极15a、漏极转接电极15b以及第一平坦化层PLN1远离有机基底10的一侧整面设置有第二平坦化层PLN2。第二平坦化层PLN2上设置有若干阳极16a。阳极16a通过对应导电插塞连接于源极转接电极15a。阳极16a与第二平坦化层PLN2远离有机基底10的一侧设置有像素定义层PDL。像素定义层PDL具有暴露阳极16a的部分区域的开口。
OLED发光块16b位于像素定义层PDL的开口内。阴极16c位于OLED发光块16b 远离有机基底10的一侧。各个像素结构16的阴极16c可以连接在一起，形成一面电极。
阴极面电极上设置有封装层。本实施例中，封装层包括第一无机封装层171、第二无机封装层173，以及第一无机封装层171与第二无机封装层173之间的有机封装层172。
本实施例中，有源层12靠近有机基底10，栅极13远离有机基底10，因而，晶体管为顶栅结构。其它实施例中，晶体管也可以为底栅结构，相对于有源层12，栅极13靠近有机基底10。
本实施例不限定像素驱动电路的具体膜层及电路结构。在一些实施例中，第一钝化层PVX1还可以位于第二平坦化层PLN2远离有机基底10的一侧。在一些实施例中，还可以不包括第一钝化层PVX1。在一些实施例中，还可以不包括第二平坦化层PLN2或第一平坦化层PLN1。
其它实施例中，像素结构16也可以为被动驱动发光方式OLED。此时，像素结构区M1无像素驱动电路。
本实施例中，有机基底10的材料可以为聚酰亚胺。有机基底10上可以整面设置有缓冲层11。缓冲层11的材质可以为二氧化硅、氮化硅、氮氧化硅等，隔绝水汽等自有机基底10向上扩散至各膜层。
仍参照图3所示，本实施例中，走线区M2可以设置有栅极线WL，数据线(未图示)与电源线(未图示)等连接各像素结构区M1的晶体管的连接线。栅极线WL可以与栅极13位于同一层。换言之，设置于走线区M2的栅极线WL与像素结构区M1的晶体管的栅极13可以同步制作。数据线与电源线平行设置，可以与源极14a、漏极14b位于同一层。换言之，设置于走线区M2的数据线、电源线与像素结构区M1的晶体管的源极14a、漏极14b可以同步制作。
图4是图2中的可拉伸区在沿显示面板的厚度方向的剖面图。图5是图4中的显示面板在制作过程中的结构示意图。
参照图4与图5所示，本实施例中，显示面板1在制作过程中，有机基底10承载在玻璃基板等载板2上。
参照图5所示，像素驱动电路以及像素结构16制作完毕后，在可拉伸区P形成多个第一开孔H1。
第一开孔H1的长度范围可以为250μm～400μm，宽度范围可以为8μm～12μm。 相邻第一开孔H1的中心的间距范围可以为300μm～500μm。
本实施例中，数值范围均包括端点值和端点值上下在工艺和测量误差范围内的浮动数值。
第一开孔H1的设置，相当于去除了部分区域的有机膜层与无机膜层，因而可形成应力释放空间，从而解决波浪形褶皱问题。
第一开孔H1贯穿有机基底10，以及依次堆叠于有机基底10上的缓冲层11、第一栅极绝缘层GI1、第二栅极绝缘层GI2、层间绝缘层ILD、第一钝化层PVX1和第一平坦化层PLN1。
制作封装层时，第一开孔H1由于深宽比较大，因而可以隔断第一无机封装层171与第二无机封装层173，即本实施例中，第一开孔H1贯穿显示面板1的整个厚度。
有机封装层172可通过打印工艺的区域控制，未设置在可拉伸区P。
此外，第一平坦化层PLN1在靠近第一开孔H1处设置有第一凹槽。第一凹槽可以增大水氧自第一开孔H1进入像素结构区M1的路径。第一凹槽外的第一平坦化层PLN1上设置有第二钝化层PVX2。第二钝化层PVX2包括靠近第一开孔H1的第一区段与远离第一开孔H1的第二区段。第一区段覆盖第一平坦化层PLN1的整个侧壁，以进一步防止水氧自第一开孔H1进入第一平坦化层PLN1。第一无机封装层171与第二钝化层PVX2直接接触。第二区段覆盖PLN1部分表面。
封装层制作完毕时，参照图4所示，剥离载板2。
图6是本发明第二实施例的显示面板的局部区域的俯视图。图7是图6中的可拉伸区在沿显示面板的厚度方向的剖面图。
参照图6与图7所示，本实施例的显示面板3与图1至图5中的显示面板1大致相同，区别仅在于：显示面板3包括堤坝20，第一开孔H1在垂直显示面板3的厚度方向的剖面呈长条状，第一开孔H1的延伸方向垂直堤坝20的延伸方向。
参照图7与图4所示，在显示面板3的堤坝20处，第一平坦化层PLN1远离有机基底10的一侧依次设置有第二平坦化层PLN2与像素定义层PDL，以增大堤坝20的高度。堤坝20可以包括至少一个，且至少一个中的任一个可以为第一平坦化层PLN1，第二平坦化层PLN2与像素定义层PDL中至少一个组成。在一些实施例中，还可以包括设置在像素定义层PDL一侧的支撑层，支撑层也可以构成堤坝20。
本实施例中，第一凹槽设置在第二平坦化层PLN2靠近第一开孔H1处。第二钝化层PVX2设置在第一凹槽外的第二平坦化层PLN2上。第二钝化层PVX2的第一区段覆盖第二平坦化层PLN2与第一平坦化层PLN1的整个侧壁。第一无机封装层171与像素定义层PDL、第二钝化层PVX2分别直接接触。
图8是本发明第三实施例的显示面板的可拉伸区在沿显示面板的厚度方向的剖面图。图9是图8中的显示面板在制作过程中的结构示意图。
参照图8与图9所示，本实施例的显示面板与图1至图7中的显示面板1、3大致相同，区别仅在于：第一开孔H1贯穿有机基底10的部分厚度。好处在于：参照图9所示，制作封装层时，第一开孔H1底部的有机基底10可隔离第一无机封装层171与载板2；剥离载板2时，可避免第一无机封装层171与载板2之间的结合力较大，引起显示面板不完整，某些有机膜层或无机膜层断裂。
其它实施例中，第一开孔H1底部的有机基底10可以保留整个厚度，或保留有机基底10上的一层或多层膜层结构。
图10是本发明第四实施例的显示面板的可拉伸区在沿显示面板的厚度方向的剖面图。
参照图10所示，本实施例的显示面板与图8至图9中的显示面板大致相同，区别仅在于：第一开孔H1在显示面板的厚度方向包括第一子开孔H11与第二子开孔H12，第一子开孔H11与第二子开孔H12之间为有机材料层，第一子开孔H11与第二子开孔H12的对称轴重合。第一子开孔H11与第二子开孔H12的对称轴为沿显示面板的厚度方向。好处在于：显示面板与其它模组贴合时，例如盖板玻璃贴合时，第一子开孔H11与第二子开孔H12分别在有机材料层的上方与下方形成缓冲空间，提高形变能力，可防止应力积累过大，引起显示面板的有机膜层或无机膜层断裂。
本实施例中，第一子开孔H11的宽度小于第二子开孔H12的宽度。其它实施例中，第一子开孔H11的宽度可以大于或等于第二子开孔H12的宽度。在一些实施例中，第一子开孔H11与第二子开孔H12部分重叠即可。
本实施例中，有机材料层为有机基底的部分厚度。其它实施例中，有机材料层也可以为其它有机膜层。
图11是图10中的显示面板在制作过程中的结构示意图。参照图11所示，显示面板在制作过程中，可以先在载板2上形成占位材料层30。占位材料层30的材质可以为氮 化硅、二氧化硅，金属等材料。在剥离载板2后，占位材料层30附着在载板2上。
图12是本发明第五实施例的显示面板的局部区域的俯视图。图13是图12中的显示区在沿显示面板的厚度方向的剖面图。
参照图12与图13所示，本实施例的显示面板4与图1至图11中的显示面大致相同，区别仅在于：相邻像素结构区M1与走线区M2之间具有第二开孔H2。
第二开孔H2的密度可以小于第一开孔H1的密度。第一开孔H1的密度是指单位面积内所有数目的第一开孔H1的面积。第二开孔H2的密度是指单位面积内所有数目的第二开孔H2的面积。
第二开孔H2的设置可以提高显示面板与其它模组贴合时，例如盖板玻璃贴合时，显示面板的形变能力，防止无机膜层或有机膜层撕裂。第二开孔H2可以与第一开孔H1在同一工序中制作。
如图4与图8实施例中，第二开孔H2可以贯穿有机基底10的整个厚度或部分厚度，或显示面板4的整个厚度或部分厚度。
如图10实施例中，第二开孔H2在显示面板4的厚度方向可以包括第三子开孔与第四子开孔，第三子开孔与第四子开孔之间为有机材料层，第三子开孔与第四子开孔的对称轴重合。第三子开孔与第四子开孔的对称轴为沿显示面板4的厚度方向。
本实施例中，第二平坦化层PLN2在靠近第二开孔H2处设置有第二凹槽。第二凹槽可以使得后续蒸镀的阴极面电极断开，增大水氧自第二开孔H2进入像素结构区M1与走线区M2的路径。第二凹槽外的第二平坦化层PLN2上设置有第二钝化层PVX2。第二钝化层PVX2包括靠近第二开孔H2的第一区段与远离第二开孔H2的第二区段。第一区段覆盖第二平坦化层PLN2与第一平坦化层PLN1的整个侧壁，以进一步防止水氧自第二开孔H2进入第一平坦化层PLN1与第二平坦化层PLN2。第一无机封装层171与阴极面电极直接接触。
基于上述显示面板，本发明一实施例还提供一种包括上述任一显示面板的显示装置。显示装置可以为：电子纸、手机、平板电脑、电视机、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
需要指出的是，在附图中，为了图示的清晰可能夸大了层和区域的尺寸。而且可以理解，当元件或层被称为在另一元件或层“上”时，它可以直接在其他元件上，或者可以存在中间的层。另外，可以理解，当元件或层被称为在另一元件或层“下”时，它可以直 接在其他元件下，或者可以存在一个以上的中间的层或元件。另外，还可以理解，当层或元件被称为在两层或两个元件“之间”时，它可以为两层或两个元件之间唯一的层，或还可以存在一个以上的中间层或元件。通篇相似的参考标记指示相似的元件。
在本发明中，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性。术语“若干”指一个、两个或两个以上，除非另有明确的限定。
本领域技术人员在考虑说明书及实践这里公开的公开后，将容易想到本发明的其它实施方案。本发明旨在涵盖本发明的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本发明的一般性原理并包括本发明未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本发明的真正范围和精神由下面的权利要求指出。
应当理解的是，本发明并不局限于上面已经描述并在附图中示出的精确结构，并且可以在不脱离其范围进行各种修改和改变。本发明的范围仅由所附的权利要求来限制。

Claims (15)

  1. 一种显示面板，其特征在于，包括显示区和位于所述显示区的至少一个边角区域的可拉伸区，所述可拉伸区设置有多个第一开孔，各个所述第一开孔之间相互错开。
  2. 根据权利要求1所述的显示面板，其特征在于，所述第一开孔在垂直所述显示面板的厚度方向的剖面呈长条状，所述可拉伸区远离所述显示区的边缘包括弧形边缘，所述第一开孔的延伸方向垂直所述弧形边缘。
  3. 根据权利要求1所述的显示面板，其特征在于，所述显示面板包括堤坝，所述第一开孔在垂直所述显示面板的厚度方向的剖面呈长条状，所述第一开孔的延伸方向垂直所述堤坝的延伸方向。
  4. 根据权利要求2或3所述的显示面板，其特征在于，所述第一开孔在垂直所述显示面板的厚度方向的剖面呈矩形、波浪形或锯齿形。
  5. 根据权利要求1所述的显示面板，其特征在于，所述第一开孔贯穿所述显示面板的整个厚度或部分厚度。
  6. 根据权利要求5所述的显示面板，其特征在于，所述第一开孔在所述显示面板的厚度方向包括第一子开孔与第二子开孔，所述第一子开孔与所述第二子开孔之间为有机材料层，所述第一子开孔与所述第二子开孔的对称轴重合。
  7. 根据权利要求5所述的显示面板，其特征在于，所述可拉伸区包括有机基底，以及依次堆叠于所述有机基底上的第一栅极绝缘层、第二栅极绝缘层、层间绝缘层、第一钝化层和第一平坦化层，所述第一开孔贯穿所述第一栅极绝缘层、所述第二栅极绝缘层、所述层间绝缘层、所述第一钝化层和所述第一平坦化层。
  8. 根据权利要求7所述的显示面板，其特征在于，所述第一平坦化层在靠近所述第一开孔处设置有第一凹槽，所述第一凹槽外的所述第一平坦化层远离所述有机基底的一侧设置有第二钝化层；所述第二钝化层包括靠近所述第一开孔的第一区段与远离所述第一开孔的第二区段，所述第一区段覆盖所述第一平坦化层的整个侧壁。
  9. 根据权利要求5所述的显示面板，其特征在于，所述显示面板包括有机基底，所述第一开孔贯穿所述有机基底的整个厚度或部分厚度。
  10. 根据权利要求1所述的显示面板，其特征在于，所述显示区包括交替设置的像素结构区与走线区，相邻所述像素结构区与所述走线区之间具有第二开孔。
  11. 根据权利要求10所述的显示面板，其特征在于，所述第二开孔贯穿所述显示面板的整个厚度或部分厚度。
  12. 根据权利要求11所述的显示面板，其特征在于，所述第二开孔在所述显示面 板的厚度方向包括第三子开孔与第四子开孔，所述第三子开孔与所述第四子开孔之间为有机材料层，所述第三子开孔与所述第四子开孔的对称轴重合。
  13. 根据权利要求11所述的显示面板，其特征在于，所述显示面板包括有机基底，所述第二开孔贯穿所述有机基底的整个厚度或部分厚度。
  14. 根据权利要求10所述的显示面板，其特征在于，所述第一开孔的密度大于所述第二开孔的密度。
  15. 一种显示装置，其特征在于，包括：权利要求1至14任一项所述的显示面板。
PCT/CN2021/126481 2021-04-28 2021-10-26 显示装置及其显示面板 WO2022227446A1 (zh)

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