WO2021036118A1 - 可折叠显示面板 - Google Patents

可折叠显示面板 Download PDF

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Publication number
WO2021036118A1
WO2021036118A1 PCT/CN2019/126889 CN2019126889W WO2021036118A1 WO 2021036118 A1 WO2021036118 A1 WO 2021036118A1 CN 2019126889 W CN2019126889 W CN 2019126889W WO 2021036118 A1 WO2021036118 A1 WO 2021036118A1
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WO
WIPO (PCT)
Prior art keywords
layer
display panel
area
foldable display
deformable
Prior art date
Application number
PCT/CN2019/126889
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English (en)
French (fr)
Inventor
郑敏
金武谦
赵勇
Original Assignee
武汉华星光电半导体显示技术有限公司
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Application filed by 武汉华星光电半导体显示技术有限公司 filed Critical 武汉华星光电半导体显示技术有限公司
Priority to US16/640,362 priority Critical patent/US11587472B2/en
Publication of WO2021036118A1 publication Critical patent/WO2021036118A1/zh

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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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/841—Self-supporting sealing arrangements
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/844—Encapsulations
    • 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
    • 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
    • H10K59/122—Pixel-defining structures or layers, e.g. banks
    • 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
    • H10K71/70—Testing, e.g. accelerated lifetime tests
    • 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
    • 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
    • H10K2102/351—Thickness
    • 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
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/873—Encapsulations
    • H10K59/8731—Encapsulations multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers

Definitions

  • the present invention relates to the technical field of display panels, and in particular to a foldable display panel.
  • foldable display panels have also emerged.
  • the bending of the foldable display panel will generate stress, which may cause problems of separation or fracture between the stacks.
  • the foldable display panel in the prior art cannot visually detect cracks or defects therein. If the defective display panel is mass-produced, the yield of the display panel will be reduced.
  • the embodiment of the present invention provides a foldable display panel, which can detect the degree of deformation and crack defects of the display panel through the luminous color and brightness of the deformable layer, thereby improving the mass production yield.
  • the embodiment of the present invention provides a foldable display panel, the display panel includes an effective area and an ineffective area arranged around the effective area, and the ineffective area of the display panel is provided with a deformable layer;
  • the material of the deformation layer includes a force-induced strain material, so as to detect the degree of deformation and crack defects of the display panel according to the luminous color and brightness of the force-induced strain material;
  • the force-induced strain material includes any one of a photoinitiator material, a fluorescent material, and a phosphorescent material.
  • the deformation layer includes a detection layer, and the force-induced strain material is disposed in the detection layer.
  • the detection layer includes a transparent organic layer.
  • the deformation layer includes a planarization layer, a pixel definition layer, a spacer layer, and a protective layer that are sequentially arranged;
  • the detection layer includes at least one of the planarization layer, the pixel definition layer, the spacer layer, and the protective layer.
  • the display panel further includes a metal layer, and the deformable layer is provided on the metal layer to reflect the light emitted by the strain-induced material through the metal layer.
  • the ineffective area includes a bending area, and the deformable layer is located in the bending area.
  • the deformable layer includes an encapsulation layer and a sealing layer, and the sealing layer is provided at the edge of the encapsulation layer;
  • the force-induced strain material is provided in the sealing layer.
  • the deformable layer further includes a retaining wall, and the encapsulation layer covers the retaining wall;
  • the force-induced strain material is also arranged in the retaining wall.
  • non-effective area includes a frame area and a corner area
  • the deformable layer is located in the frame area or the corner area.
  • the photoinitiator material includes benzophenone.
  • An embodiment of the present invention also provides a foldable display panel, the display panel including an effective area and an ineffective area arranged around the effective area, and the ineffective area of the display panel is provided with a deformable layer;
  • the material of the deformation layer includes a force-induced strain material to detect the degree of deformation and crack defects of the display panel according to the luminous color and brightness of the force-induced strain material.
  • the deformation layer includes a detection layer, and the force-induced strain material is disposed in the detection layer.
  • the detection layer includes a transparent organic layer.
  • the deformation layer includes a planarization layer, a pixel definition layer, a spacer layer, and a protective layer that are sequentially arranged;
  • the detection layer includes at least one of the planarization layer, the pixel definition layer, the spacer layer, and the protective layer.
  • the display panel further includes a metal layer, and the deformable layer is provided on the metal layer to reflect the light emitted by the strain-induced material through the metal layer.
  • the ineffective area includes a bending area, and the deformable layer is located in the bending area.
  • the deformable layer includes an encapsulation layer and a sealing layer, and the sealing layer is provided at the edge of the encapsulation layer;
  • the force-induced strain material is provided in the sealing layer.
  • the deformable layer further includes a retaining wall, and the encapsulation layer covers the retaining wall;
  • the force-induced strain material is also arranged in the retaining wall.
  • non-effective area includes a frame area and a corner area
  • the deformable layer is located in the frame area or the corner area.
  • a deformable layer is provided in the non-effective area of the display panel, and the material of the deformable layer includes a force-induced strain material, and the deformable layer is irradiated with ultraviolet light, because the force-induced strain material in the deformable layer deforms at different degrees The lower light emission color and brightness are different, so the stress visualization is realized according to the light emission color and brightness of the deformable layer, and then defects in the display panel are detected, and mass production of defective display panels is prevented, thereby improving the mass production yield of the display panel.
  • FIG. 1 is a schematic structural diagram of a foldable display panel provided by an embodiment of the present invention
  • FIG. 2 is a cross-sectional view of a package edge area and a bending area of a foldable display panel provided by an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a foldable display panel provided by an embodiment of the present invention.
  • FIG. 4 is a cross-sectional view of a frame area of a foldable display panel provided by an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a foldable display panel provided by an embodiment of the present invention.
  • FIG. 6 is a cross-sectional view of a corner area of a foldable display panel provided by an embodiment of the present invention.
  • FIG. 1 is a schematic structural diagram of a foldable display panel provided by an embodiment of the present invention.
  • the foldable display panel provided by this embodiment includes an effective area 1 and an ineffective area 20 arranged around the effective area 10.
  • the effective area 10 may be a display area of the display panel
  • the non-effective area 20 may be a non-display area of the display panel.
  • the non-active area of the display panel is provided with a deformable layer, and the deformed layer refers to a film layer that is deformed due to stress during the bending process of the display panel.
  • the material of the deformable layer includes a force-induced strain material.
  • the force-induced strain material emits light when irradiated by ultraviolet light UV, and the stress is different, and the light-emitting color and brightness of the force-induced strain material are different.
  • the luminous color and brightness of the display panel are used to detect the degree of deformation of the display panel, and then detect whether there are defects in the display panel, such as detecting whether the film layer in the display panel has cracks, whether the film layer is uniformly stressed, etc., to prevent defective display panels Mass production, thereby improving the mass production yield of display panels.
  • the force-induced strain material includes any one of a photoinitiator material, a fluorescent material, and a phosphorescent material.
  • the photoinitiator material includes benzophenone. If the force-induced strain material is a photoinitiator material, ultraviolet light irradiates the photoinitiator material, which can excite free radicals in the photoinitiator material, change the cross-linking structure of the polymer, and then make the photoinitiator material emit light. The bending causes different degrees of deformation of the photoinitiator material, which will cause the wavelength of the photoinitiator to produce a "blue shift" and a "red shift", thereby changing the color of light.
  • the strained material is a fluorescent material or phosphorescent material
  • cracks will be generated when the display panel is bent, exposing the fluorescent material or phosphorescent material in the crack, and the light of the fluorescent material or phosphorescent material is released by ultraviolet light irradiation, and the display panel
  • the degree of deformation is different, and the luminous color and brightness of the fluorescent material or phosphorescent material are different.
  • the deformation layer includes a detection layer, and the force-induced strain material is disposed in the detection layer.
  • the detection layer includes a transparent organic layer, that is, the transparent organic layer is doped with a strain-resistant material.
  • the deformation layer may be disposed in the bending area of the display panel, that is, the bending area is provided with a transparent organic layer doped with a strain-induced material.
  • the inactive area 20 includes a bending area 30, which is close to the lower boundary of the display panel, and the bending area 30 can be folded to the back of the display panel.
  • the bending area 30 is provided with a transparent organic layer.
  • the bending area 30 is irradiated with ultraviolet light, and the display panel is detected by the luminous color and brightness of the strain-induced material in the transparent organic layer. The degree of deformation and crack defects.
  • the deformable layer includes a planarization layer, a pixel definition layer, a spacer layer, and a protective layer that are sequentially arranged, and the deformable layer may be located in the bending area, that is, as shown in FIG. 2, the bending area 30 is sequentially arranged
  • the detection layer includes the planarization layer 31, the pixel definition layer 32, the spacer layer 33, and the protective layer 34. At least one of the planarization layer 31, the pixel definition layer 32, the spacer layer 33, and the protective layer 34 is doped with a strain-resistant material.
  • the material of the protective layer 34 in FIG. 2 is doped with a strain-resistant material.
  • the protective layer 34 is deformed by a lateral tensile force T, and is irradiated with ultraviolet light.
  • the color and brightness of the light-emitting VIS of the strained material change, so that the degree of deformation and crack defects of the display panel can be detected according to the change of the light-emitting color and brightness.
  • the display panel further includes a metal layer, and the deformation layer is provided on the metal layer, that is, as shown in FIG. 2, a metal layer 35 is further provided in the bending area 30, and the deformation layer is provided On the metal layer 35, the light emitted by the strain-induced material is reflected by the metal layer 35.
  • the metal layer 35 may include a source electrode and a drain electrode.
  • the metal layer 35 is provided on the side of the planarization layer 31 away from the pixel definition layer 32, on the planarization layer 31, the pixel definition layer 32, the spacer layer 33, and the protection layer.
  • the material of at least one of the layers of the layer 34 is doped with a strain-resistant material, the light emitted by the strain-resistant material reaches the metal layer 35, and the metal layer 35 reflects the light so that more light can be sensed for stress. Detection of luminous color and brightness of strain-induced materials.
  • the display panel further includes a substrate 36 and an organic filling layer 37.
  • the organic filling layer 37 is provided on the side of the metal layer 35 away from the planarization layer 31, and the substrate 36 is provided on the side of the organic filling layer 37 away from the metal layer 36. .
  • the substrate 36, the organic filling layer 37, and the metal layer 35 are sequentially manufactured, and then the PI of at least one of the planarization layer 31, the pixel definition layer 32, the spacer layer 33, and the protective layer 34
  • the material is doped with a strain-resistant material, and then coated on the metal layer 35, and cured by ultraviolet light to form a corresponding film layer.
  • the inactive area 20 also includes a package edge area 40, and the package edge area 40 is located between the effective area 10 and the bending area 30.
  • the package edge region 40 includes a substrate 36, a buffer layer 38, a metal layer 35, a planarization layer 31, a pixel definition layer 32, and an encapsulation layer 39 arranged in sequence, which will not be described in detail here.
  • the deformable layer includes an encapsulation layer and a sealing layer, the sealing layer is arranged at the edge of the encapsulation layer; the force-induced strain material is arranged in the sealing layer. Further, the deformable layer further includes a retaining wall, and the encapsulation layer covers the retaining wall; the force-induced strain material is also arranged in the retaining wall.
  • the deformable layer may be disposed in the frame area or the corner area of the display panel.
  • the non-effective area 20 includes a frame area 50, and the frame area 50 is an area of the non-effective area 20 excluding the bending area 30 and the package edge area 40.
  • the frame area 50 is provided with a first encapsulation layer 51 and a first sealing layer 52, the first sealing layer 52 is provided at the edge of the first encapsulation layer 51, and the first sealing layer 52 is used to seal the edge of the first encapsulation layer 51 to prevent water and oxygen from entering the effective area 10 through the edge of the first encapsulation layer 51 to detect defects of the display panel through stress visualization, and to enhance the adhesion between the stacks.
  • the first sealing layer 52 is doped with a strain-resistant material, and the deformable layer includes the first sealing layer 52. There may be separation between the first encapsulation layer 51 and the first sealing layer 52, so the first sealing layer 52 will be deformed by the longitudinal tension T.
  • the frame area 50 is irradiated with ultraviolet light, and the degree of deformation and crack defects of the first sealing layer 52 are detected through the color and brightness of the light-emitting VIS of the strain-induced material in the transparent organic layer.
  • a first retaining wall 53 is further provided in the frame area 50, and the first encapsulation layer 51 covers the first retaining wall 53; the first retaining wall 53 is doped A strong strain material, the deformable layer further includes the first retaining wall 53.
  • the frame area 50 is further provided with a substrate 54, a buffer layer 55, a planarization layer 56, and a pixel definition layer 57 in this order.
  • the first barrier wall 53 includes a partial planarization layer 56 and a pixel definition layer 57.
  • the material of the pixel definition layer 57 in the barrier wall 53 is doped with a strain-resistant material.
  • the first encapsulation layer 51 specifically includes a first inorganic layer 511, an organic layer 512, and a second inorganic layer 513.
  • the first inorganic layer 511 is disposed on the pixel defining layer 57, the buffer layer 55, and the first retaining wall 53, and the organic layer 512 It is provided on the first inorganic layer 511, the second inorganic layer 513 is provided on the organic layer 512, the first inorganic layer 511 and the buffer layer 55, and the first sealing layer 52 is provided on the second inorganic layer 513 and the buffer layer 55.
  • the inactive area 20 further includes a corner area 60, which is the four corner areas of the display panel.
  • the corner area 60 is provided with a second encapsulation layer 61 and a second sealing layer 62
  • the second sealing layer 62 is provided at the edge of the second encapsulation layer 61
  • the second sealing layer The layer 62 is used to seal the edge of the second encapsulation layer 61 to prevent water and oxygen from entering the effective area 10 through the edge of the second encapsulation layer 61, so as to detect defects of the display panel through stress visualization, and can also enhance the adhesion between stacks.
  • the second sealing layer 62 is doped with a strain-resistant material, and the deformable layer includes the second sealing layer 62.
  • the second sealing layer 61 and the second sealing layer 62 in the corner area 60 are likely to be separated, so the second sealing layer 62 will be deformed by the longitudinal tension T.
  • the corner area 60 is irradiated with ultraviolet light, and the degree of deformation and crack defects of the second sealing layer 62 are detected through the color and brightness of the light-emitting VIS of the force-induced strain material in the transparent organic layer.
  • a second retaining wall 63 is further provided in the corner area 60, and the second encapsulating layer 61 covers the second retaining wall 63; the second retaining wall 63 is doped with a strain-resistant material, The deformable layer further includes the second retaining wall 63.
  • the corner area 60 is further provided with a substrate 64, a buffer layer 65, a planarization layer 66, and a pixel definition layer 67 in this order.
  • the second retaining wall 63 includes a partial planarization layer 66 and a pixel defining layer 67. Specifically, the material of the pixel defining layer 67 in the retaining wall 63 is doped with a strain-resistant material.
  • the second encapsulation layer 61 specifically includes a first inorganic layer 611, an organic layer 612, and a second inorganic layer 613. The first inorganic layer 611 is disposed on the pixel defining layer 67, the buffer layer 65, and the second retaining wall 63.
  • the organic layer 612 It is provided on the first inorganic layer 611, the second inorganic layer 613 is provided on the organic layer 612, the first inorganic layer 611 and the buffer layer 65, and the second sealing layer 62 is provided on the second inorganic layer 613 and the buffer layer 65.
  • the foldable display panel provided by this embodiment can be provided with a deformable layer in the non-active area of the display panel, and the material of the deformable layer includes a force-induced strain material.
  • the deformable layer is irradiated by ultraviolet light.
  • the light-emitting color and brightness of the strained material under different deformation levels are different, so the stress visualization is realized according to the light-emitting color and brightness of the deformed layer, and then the defects in the display panel can be detected, and the mass production of the defective display panel can be prevented, thereby improving the display panel's performance. Mass production yield.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种可折叠显示面板，所述显示面板包括有效区（10）以及环绕所述有效区（10）设置的非有效区（20），所述显示面板的非有效区（20）中设有形变层；所述形变层的材料包括力致应变材料，以根据所述力致应变材料的发光颜色和亮度来检测所述显示面板的形变程度和裂纹缺陷。

Description

可折叠显示面板
本申请要求于2019年8月29日提交中国专利局、申请号为201910809497.4、发明名称为“一种可折叠显示面板”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及显示面板技术领域，尤其涉及一种可折叠显示面板。
 背景技术
随着柔性OLED屏幕的应用，可折叠显示面板也应运而生，然而在制作过程中，由于可折叠显示面板弯折时会产生应力，可能会导致其层叠间的分离或者断裂的问题。现有技术中的可折叠显示面板无法直观检测其中的裂纹或不良，若将不良显示面板量产，会降低显示面板的良率。
 技术问题
本发明实施例提供一种可折叠显示面板，能够通过形变层的发光颜色和亮度检测显示面板的形变程度和裂纹缺陷，提高量产良率。
 技术解决方案
本发明实施例提供了一种可折叠显示面板，所述显示面板包括有效区以及环绕所述有效区设置的非有效区，所述显示面板的非有效区中设有形变层；
所述形变层的材料包括力致应变材料，以根据所述力致应变材料的发光颜色和亮度来检测所述显示面板的形变程度和裂纹缺陷；
所述力致应变材料包括光引发剂材料、荧光材料和磷光材料中的任意一种。
在一个实施例中，所述形变层包括检测层，所述力致应变材料设置在所述检测层中。
可选地，所述检测层包括透明有机层。
可选地，所述形变层包括依次设置的平坦化层、像素定义层、间隔层和保护层；
所述检测层包括所述平坦化层、所述像素定义层、所述间隔层和所述保护层中的至少一个。
进一步地，所述显示面板还包括金属层，所述形变层设于所述金属层上，以通过所述金属层将所述力致应变材料发出的光进行反射。
进一步地，所述非有效区包括弯折区，所述形变层位于所述弯折区。
在另一个实施例中，所述形变层包括封装层和密封层，所述密封层设于所述封装层的边缘处；
所述力致应变材料设置在所述密封层中。
进一步地，所述形变层还包括挡墙，所述封装层覆盖所述挡墙；
所述力致应变材料还设置在所述挡墙中。
进一步地，所述非有效区包括边框区和边角区；
所述形变层位于所述边框区或所述边角区。
进一步地，所述光引发剂材料包括苯甲酮。
本发明实施例还提供一种可折叠显示面板，所述显示面板包括有效区以及环绕所述有效区设置的非有效区，所述显示面板的非有效区中设有形变层；
所述形变层的材料包括力致应变材料，以根据所述力致应变材料的发光颜色和亮度来检测所述显示面板的形变程度和裂纹缺陷。
在一个实施例中，所述形变层包括检测层，所述力致应变材料设置在所述检测层中。
可选地，所述检测层包括透明有机层。
可选地，所述形变层包括依次设置的平坦化层、像素定义层、间隔层和保护层；
所述检测层包括所述平坦化层、所述像素定义层、所述间隔层和所述保护层中的至少一个。
进一步地，所述显示面板还包括金属层，所述形变层设于所述金属层上，以通过所述金属层将所述力致应变材料发出的光进行反射。
进一步地，所述非有效区包括弯折区，所述形变层位于所述弯折区。
在另一个实施例中，所述形变层包括封装层和密封层，所述密封层设于所述封装层的边缘处；
所述力致应变材料设置在所述密封层中。
进一步地，所述形变层还包括挡墙，所述封装层覆盖所述挡墙；
所述力致应变材料还设置在所述挡墙中。
进一步地，所述非有效区包括边框区和边角区；
所述形变层位于所述边框区或所述边角区。
 有益效果
本发明的有益效果为：在显示面板的非有效区中设置形变层，且形变层的材料包括力致应变材料，通过紫外光照射形变层，由于形变层中的力致应变材料在不同形变程度下的发光颜色和亮度不同，因此根据形变层的发光颜色和亮度实现应力可视化，进而检测显示面板中的不良，防止不良显示面板的量产，从而提高显示面板的量产良率。
 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发明的一些实施例，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为本发明实施例提供的可折叠显示面板的一个结构示意图；
图2为本发明实施例提供的可折叠显示面板的封装边缘区和弯折区的截面图；
图3为本发明实施例提供的可折叠显示面板的一个结构示意图；
图4为本发明实施例提供的可折叠显示面板的边框区的截面图；
图5为本发明实施例提供的可折叠显示面板的一个结构示意图；
图6为本发明实施例提供的可折叠显示面板的边角区的截面图。
 本发明的实施方式
以下参考说明书附图介绍本发明的优选实施例，用以举例证明本发明可以实施，这些实施例可以向本领域中的技术人员完整介绍本发明的技术内容，使得本发明的技术内容更加清楚和便于理解。然而本发明可以通过许多不同形式的实施例来得以体现，本发明的保护范围并非仅限于文中提到的实施例。
本发明说明书中使用的术语仅用来描述特定实施方式，而并不意图显示本发明的概念。除非上下文中有明确不同的意义，否则，以单数形式使用的表达涵盖复数形式的表达。在本发明说明书中，应理解，诸如“包括”、“具有”以及“含有”等术语意图说明存在本发明说明书中揭示的特征、数字、步骤、动作或其组合的可能性，而并不意图排除可存在或可添加一个或多个其他特征、数字、步骤、动作或其组合的可能性。附图中的相同参考标号指代相同部分。
参见图1，是本发明实施例提供的可折叠显示面板的结构示意图。
如图1所示，本实施例提供的可折叠显示面板包括有效区1以及环绕所述有效区10设置的非有效区20。其中，有效区10可以为显示面板的显示区，非有效区20可以为显示面板的非显示区。
所述显示面板的非有效区中设有形变层，形变层是指在显示面板弯折过程中受应力影响会产生形变的膜层。所述形变层的材料包括力致应变材料，力致应变材料受紫外光UV的照射会发光，且受到的应力不同，力致应变材料的发光颜色和亮度不同，因此根据所述力致应变材料的发光颜色和亮度来检测所述显示面板的形变程度，进而检测显示面板中是否存在不良，例如检测显示面板中的膜层是否出现裂纹，膜层受到的应力是否均匀等，以防止不良显示面板的量产，从而提高显示面板的量产良率。
具体地，所述力致应变材料包括光引发剂材料、荧光材料和磷光材料中的任意一种。其中，所述光引发剂材料包括苯甲酮。若力致应变材料为光引发剂材料，紫外光照射光引发剂材料，可以激发光引发剂材料中的自由基，改变其高分子的交联结构，进而使光引发剂材料发光，而显示面板的弯折使光引发剂材料产生不同程度的形变，会导致其波长产生“蓝移”“红移”，进而改变发光颜色。若力致应变材料为荧光材料或磷光材料，显示面板弯折时会产生裂缝，暴露出裂缝中的荧光材料或磷光材料，而荧光材料或磷光材料的光通过紫外光照射被释放出来，显示面板形变程度不同，荧光材料或磷光材料的发光颜色和亮度不同。
在一个实施例中，所述形变层包括检测层，所述力致应变材料设置在所述检测层中。具体地，所述检测层包括透明有机层，即透明有机层中掺杂有力致应变材料。在形变层包括检测层时，形变层可以设置在显示面板的弯折区，即弯折区中设有掺杂力致应变材料的透明有机层。如图1所示，所述非有效区20包括弯折区30，弯折区30靠近显示面板的下边界，弯折区30可折叠到显示面板的背部。所述弯折区30中设有透明有机层，在显示面板的弯折过程中，对弯折区30进行紫外光照射，通过透明有机层中力致应变材料的发光颜色和亮度来检测显示面板的形变程度和裂纹缺陷。
具体地，所述形变层包括依次设置的平坦化层、像素定义层、间隔层和保护层，而形变层可以位于弯折区，即如图2所示，所述弯折区30中依次设有平坦化层31、像素定义层32、间隔层33和保护层34，所述检测层包括所述平坦化层31、所述像素定义层32、所述间隔层33和所述保护层34中的至少一个，即平坦化层31、像素定义层32、间隔层33和保护层34中的至少一个膜层的材料中掺杂有力致应变材料。
例如，图2中的保护层34的材料中掺杂有力致应变材料，在显示面板弯折过程中，保护层34受到横向的拉力T产生形变，经紫外光UV照射，其中掺杂的力致应变材料发光VIS的颜色和亮度发生变化，从而根据发光颜色和亮度变化来检测显示面板的形变程度和裂纹缺陷。
进一步地，所述显示面板还包括金属层，所述形变层设于所述金属层上，即如图2所示，所述弯折区30中还设有金属层35，所述形变层设于所述金属层35上，以通过所述金属层35将所述力致应变材料发出的光进行反射。
需要说明的是，金属层35可以包括源极和漏极，金属层35设于平坦化层31背离像素定义层32的一侧，在平坦化层31、像素定义层32、间隔层33和保护层34中的至少一个膜层的材料中掺杂有力致应变材料时，有力致应变材料发出的光到达金属层35，金属层35对光进行反射，使更多的光被感知，以进行力致应变材料发光颜色和亮度的检测。
进一步地，所述显示面板还包括基板36和有机填充层37，有机填充层37设于金属层35背离平坦化层31的一侧，基板36设于有机填充层37背离金属层36的一侧。
具体地，在制作过程中，先依次制作基板36、有机填充层37和金属层35，进而在平坦化层31、像素定义层32、间隔层33和保护层34中的至少一个膜层的PI材料中掺杂有力致应变材料，再涂覆到金属层35上，经紫外光照射固化形成相应的膜层。
另外，如图1和图2所示，非有效区20还包括封装边缘区40，封装边缘区40位于有效区10和弯折区30之间。封装边缘区40包括依次设置的基板36、缓冲层38、金属层35、平坦化层31、像素定义层32和封装层39，在此不再详细赘述。
在另一个实施例中，所述形变层包括封装层和密封层，所述密封层设于所述封装层的边缘处；所述力致应变材料设置在所述密封层中。进一步地，所述形变层还包括挡墙，所述封装层覆盖所述挡墙；所述力致应变材料还设置在所述挡墙中。在形变层包括封装层和密封层时，形变层可以设置在显示面板的边框区或边角区。
在形变层位于边框区时，如图3所示，所述非有效区20包括边框区50，边框区50为非有效区20中除去弯折区30和封装边缘区40的区域。如图4所示，所述边框区50中设有第一封装层51和第一密封层52，所述第一密封层52设于所述第一封装层51的边缘处，第一密封层52用于对第一封装层51的边缘进行密封，防止水氧通过第一封装层51的边缘进入有效区10，以通过应力可视化检测显示面板的不良，还可以增强层叠之间的粘性。
所述第一密封层52中掺杂有力致应变材料，所述形变层包括所述第一密封层52。第一封装层51与第一密封层52之间可能会产生分离，因此第一密封层52会受到纵向拉力T产生形变。对边框区50进行紫外光UV照射，通过透明有机层中力致应变材料发光VIS的颜色和亮度来检测第一密封层52的形变程度和裂纹缺陷。
进一步地，如图4所示，所述边框区50中还设有第一挡墙53，所述第一封装层51覆盖所述第一挡墙53；所述第一挡墙53中掺杂有力致应变材料，所述形变层还包括所述第一挡墙53。
需要说明的是，边框区50中还依次设有基板54、缓冲层55、平坦化层56、像素定义层57。第一挡墙53包括部分平坦化层56和像素定义层57，具体地，挡墙53中的像素定义层57的材料中掺杂有力致应变材料。第一封装层51具体包括第一无机层511、有机层512和第二无机层513，第一无机层511设于像素定义层57、缓冲层55、和第一挡墙53上，有机层512设于第一无机层511上，第二无机层513设于有机层512、第一无机层511和缓冲层55上，第一密封层52设于第二无机层513和缓冲层55上。
在形变层位于边角区时，如图5所示，所述非有效区20还包括边角区60，边角区60为显示面板的四角区。如图6所示，所述边角区60中设有第二封装层61和第二密封层62，所述第二密封层62设于所述第二封装层61的边缘处，第二密封层62用于对第二封装层61的边缘进行密封，防止水氧通过第二封装层61的边缘进入有效区10，以通过应力可视化检测显示面板的不良，还可以增强层叠之间的粘性。
所述第二密封层62中掺杂有力致应变材料，所述形变层包括所述第二密封层62。边角区60中的第二封装层61与第二密封层62之间容易产生分离，因此第二密封层62会受到纵向拉力T产生形变。对边角区60进行紫外光UV照射，通过透明有机层中力致应变材料发光VIS的颜色和亮度来检测第二密封层62的形变程度和裂纹缺陷。
进一步地，所述边角区60中还设有第二挡墙63，所述第二封装层61覆盖所述第二挡墙63；所述第二挡墙63中掺杂有力致应变材料，所述形变层还包括所述第二挡墙63。
需要说明的是，边角区60中还依次设有基板64、缓冲层65、平坦化层66、像素定义层67。第二挡墙63包括部分平坦化层66和像素定义层67，具体地，挡墙63中的像素定义层67的材料中掺杂有力致应变材料。第二封装层61具体包括第一无机层611、有机层612和第二无机层613，第一无机层611设于像素定义层67、缓冲层65、和第二挡墙63上，有机层612设于第一无机层611上，第二无机层613设于有机层612、第一无机层611和缓冲层65上，第二密封层62设于第二无机层613和缓冲层65上。
由上述可知，本实施例提供的可折叠显示面板，能够在显示面板的非有效区中设置形变层，且形变层的材料包括力致应变材料，通过紫外光照射形变层，由于形变层中的力致应变材料在不同形变程度下的发光颜色和亮度不同，因此根据形变层的发光颜色和亮度实现应力可视化，进而检测显示面板中的不良，防止不良显示面板的量产，从而提高显示面板的量产良率。
综上所述，虽然本发明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发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (19)

  1. 一种可折叠显示面板，其中，所述显示面板包括有效区以及环绕所述有效区设置的非有效区，所述显示面板的非有效区中设有形变层；
    所述形变层的材料包括力致应变材料，以根据所述力致应变材料的发光颜色和亮度来检测所述显示面板的形变程度和裂纹缺陷；
    所述力致应变材料包括光引发剂材料、荧光材料和磷光材料中的任意一种。
  2. 根据权利要求1所述的可折叠显示面板，其中，所述形变层包括检测层，所述力致应变材料设置在所述检测层中。
  3. 根据权利要求2所述的可折叠显示面板，其中，所述检测层包括透明有机层。
  4. 根据权利要求2所述的可折叠显示面板，其中，所述形变层包括依次设置的平坦化层、像素定义层、间隔层和保护层；
    所述检测层包括所述平坦化层、所述像素定义层、所述间隔层和所述保护层中的至少一个。
  5. 根据权利要求2所述的可折叠显示面板，其中，所述显示面板还包括金属层，所述形变层设于所述金属层上，以通过所述金属层将所述力致应变材料发出的光进行反射。
  6. 根据权利要求2所述的可折叠显示面板，其中，所述非有效区包括弯折区，所述形变层位于所述弯折区。
  7. 根据权利要求1所述的可折叠显示面板，其中，所述形变层包括封装层和密封层，所述密封层设于所述封装层的边缘处；
    所述力致应变材料设置在所述密封层中。
  8. 根据权利要求7所述的可折叠显示面板，其中，所述形变层还包括挡墙，所述封装层覆盖所述挡墙；
    所述力致应变材料还设置在所述挡墙中。
  9. 根据权利要求7所述的可折叠显示面板，其中，所述非有效区包括边框区和边角区；
    所述形变层位于所述边框区或所述边角区。
  10. 根据权利要求1所述的可折叠显示面板，其中，所述光引发剂材料包括苯甲酮。
  11. 一种可折叠显示面板，其中，所述显示面板包括有效区以及环绕所述有效区设置的非有效区，所述显示面板的非有效区中设有形变层；
    所述形变层的材料包括力致应变材料，以根据所述力致应变材料的发光颜色和亮度来检测所述显示面板的形变程度和裂纹缺陷。
  12. 根据权利要求11所述的可折叠显示面板，其中，所述形变层包括检测层，所述力致应变材料设置在所述检测层中。
  13. 根据权利要求12所述的可折叠显示面板，其中，所述检测层包括透明有机层。
  14. 根据权利要求12所述的可折叠显示面板，其中，所述形变层包括依次设置的平坦化层、像素定义层、间隔层和保护层；
    所述检测层包括所述平坦化层、所述像素定义层、所述间隔层和所述保护层中的至少一个。
  15. 根据权利要求12所述的可折叠显示面板，其中，所述显示面板还包括金属层，所述形变层设于所述金属层上，以通过所述金属层将所述力致应变材料发出的光进行反射。
  16. 根据权利要求12所述的可折叠显示面板，其中，所述非有效区包括弯折区，所述形变层位于所述弯折区。
  17. 根据权利要求11所述的可折叠显示面板，其中，所述形变层包括封装层和密封层，所述密封层设于所述封装层的边缘处；
    所述力致应变材料设置在所述密封层中。
  18. 根据权利要求17所述的可折叠显示面板，其中，所述形变层还包括挡墙，所述封装层覆盖所述挡墙；
    所述力致应变材料还设置在所述挡墙中。
  19. 根据权利要求17所述的可折叠显示面板，其中，所述非有效区包括边框区和边角区；
    所述形变层位于所述边框区或所述边角区。
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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110911466B (zh) * 2019-11-29 2022-08-19 京东方科技集团股份有限公司 一种基板及其制备方法、母板的制备方法、掩膜版和蒸镀装置
CN112018158B (zh) * 2020-08-06 2022-07-29 武汉华星光电半导体显示技术有限公司 一种显示面板以及显示装置
CN113078188B (zh) * 2021-03-05 2022-07-12 武汉天马微电子有限公司 显示面板及显示装置
CN115171526A (zh) * 2022-06-17 2022-10-11 昆山国显光电有限公司 显示面板及该显示面板应力发生区域的确定方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105609533A (zh) * 2016-01-05 2016-05-25 京东方科技集团股份有限公司 柔性显示面板及其制作方法和应力变色聚合物的制作方法
CN107437400A (zh) * 2017-09-04 2017-12-05 上海天马有机发光显示技术有限公司 显示面板和显示装置
CN108154800A (zh) * 2016-12-05 2018-06-12 三星显示有限公司 显示装置
CN208422960U (zh) * 2018-05-31 2019-01-22 京东方科技集团股份有限公司 阵列基板、显示装置
US20190157361A1 (en) * 2016-04-01 2019-05-23 Lg Display Co., Ltd. Organic light emitting display device having sub pixels of different areas and distances
CN109830502A (zh) * 2017-11-23 2019-05-31 乐金显示有限公司 有机发光显示装置

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2252411C1 (ru) * 2004-04-09 2005-05-20 Общество с ограниченной ответственностью "Институт рентгеновской оптики" Флюоресцентный сенсор на основе многоканальных структур
GB0415773D0 (en) * 2004-07-15 2004-08-18 Koninkl Philips Electronics Nv A flexible display device
KR102117890B1 (ko) * 2012-12-28 2020-06-02 엘지디스플레이 주식회사 플렉서블 표시 장치 및 플렉서블 표시 장치 제조 방법
US10414194B2 (en) * 2013-11-08 2019-09-17 Bank Of Canada Optically variable devices, their production and use
CN105977400B (zh) * 2016-07-21 2018-01-26 京东方科技集团股份有限公司 一种显示面板及其制备方法、显示装置
KR20180018972A (ko) * 2016-08-12 2018-02-22 삼성디스플레이 주식회사 유기 발광 표시 장치
CN106154800B (zh) 2016-09-09 2018-12-25 京东方科技集团股份有限公司 全息显示装置及其全息显示方法
CN106383610B (zh) * 2016-09-21 2019-07-05 京东方科技集团股份有限公司 一种按压反馈装置、显示装置及其控制方法
CN106653818B (zh) * 2017-01-23 2019-11-08 上海天马有机发光显示技术有限公司 一种显示面板、显示装置及该显示面板的制备方法
CN108258145B (zh) * 2018-01-16 2020-04-10 京东方科技集团股份有限公司 一种显示面板及显示装置
CN208126840U (zh) * 2018-03-02 2018-11-20 京东方科技集团股份有限公司 一种电致发光显示面板及显示装置
KR102640726B1 (ko) * 2018-04-18 2024-02-27 삼성디스플레이 주식회사 유기 발광 표시 장치
US20190393278A1 (en) * 2018-06-26 2019-12-26 Innolux Corporation Display device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105609533A (zh) * 2016-01-05 2016-05-25 京东方科技集团股份有限公司 柔性显示面板及其制作方法和应力变色聚合物的制作方法
US20190157361A1 (en) * 2016-04-01 2019-05-23 Lg Display Co., Ltd. Organic light emitting display device having sub pixels of different areas and distances
CN108154800A (zh) * 2016-12-05 2018-06-12 三星显示有限公司 显示装置
CN107437400A (zh) * 2017-09-04 2017-12-05 上海天马有机发光显示技术有限公司 显示面板和显示装置
CN109830502A (zh) * 2017-11-23 2019-05-31 乐金显示有限公司 有机发光显示装置
CN208422960U (zh) * 2018-05-31 2019-01-22 京东方科技集团股份有限公司 阵列基板、显示装置

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