WO2023240690A1 - 显示面板 - Google Patents

显示面板 Download PDF

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Publication number
WO2023240690A1
WO2023240690A1 PCT/CN2022/102245 CN2022102245W WO2023240690A1 WO 2023240690 A1 WO2023240690 A1 WO 2023240690A1 CN 2022102245 W CN2022102245 W CN 2022102245W WO 2023240690 A1 WO2023240690 A1 WO 2023240690A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
area
display panel
refractive layer
refractive
Prior art date
Application number
PCT/CN2022/102245
Other languages
English (en)
French (fr)
Inventor
李漫丽
Original Assignee
武汉华星光电半导体显示技术有限公司
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 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 US17/790,247 priority Critical patent/US20240180003A1/en
Publication of WO2023240690A1 publication Critical patent/WO2023240690A1/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
    • 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
    • H10K59/875—Arrangements for extracting light from the devices
    • H10K59/879—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
    • 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
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/85—Arrangements for extracting light from the devices
    • H10K50/858—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
    • 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
    • H10K59/40—OLEDs integrated with touch screens
    • 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
    • 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
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • 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
    • 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
    • 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 application relates to the field of display technology, and in particular to a display panel.
  • OLED display products have reduced luminous efficiency due to their own waveguide and total reflection effects.
  • a first refractive layer and a second refractive layer are usually added to the luminescent layer.
  • the refractive index of the first refractive layer is smaller than the refractive index of the second refractive layer, and the difference in interface angle and refractive index between the first refractive layer and the second refractive layer is used to improve the forward light emission and reduce the display power consumption of the screen.
  • narrow bezels are achieved by bending the binding area of the display panel to the back of the display area.
  • Embodiments of the present application provide a display panel to solve the technical problem that existing display panels are provided with a protective adhesive layer in the bending area to prevent wiring breakage, which requires an additional manufacturing process, resulting in increased costs.
  • the present application provides a display panel, including a display area and a non-display area, where the non-display area includes a binding area and a bending area located between the display area and the binding area;
  • the display panel includes:
  • a light-emitting layer disposed on one side of the substrate and located in the display area, the light-emitting layer including a plurality of sub-pixels;
  • a first refractive layer is disposed on a side of the light-emitting layer away from the substrate.
  • the first refractive layer includes a plurality of openings located in the display area, and the plurality of openings correspond to a plurality of the sub-pixels. set up;
  • a second refractive layer covers the side of the first refractive layer away from the substrate and fills the opening.
  • the refractive index of the second refractive layer is greater than the refractive index of the first refractive layer.
  • a birefringent layer extends from the display area to the non-display area and covers the bending area;
  • a first backplane and a second backplane The first backplane is located on the side of the substrate facing the second backplane and is located in the display area.
  • the second backplane is located on the side of the substrate facing the second backplane.
  • One side of the first back plate is located in the binding area.
  • the display panel provided by the present application, there is a gap between the first refractive layer and the bending area and they are not overlapped.
  • the thickness of the second refractive layer in the display area is smaller than the thickness of the second refractive layer in the bending area.
  • the second refractive layer includes a main body part and a leveling part that are connected, at least part of the main body part is located in the display area, and the leveling part is formed by the main body part along the
  • the display area extends in the direction of the bending area and gradually becomes thinner in thickness, and the thickness of the main body part is equal at various positions.
  • the leveling portion is located between the bending area and the binding area.
  • the display panel further includes a polarizer, the polarizer is disposed on a side of the second refractive layer away from the substrate and is located in the display area, and the main body part is away from the substrate.
  • One side surface of the substrate is in contact with a side surface of the polarizer close to the substrate.
  • the display panel further includes: a blocking wall provided between the bending area and the binding area, and the second refractive layer covers the bending area and extends to Describe the retaining wall.
  • the blocking wall and the first refractive layer are made of the same material.
  • the display panel also includes:
  • An encapsulation layer is disposed between the light-emitting layer and the first refractive layer, the encapsulation layer covers the light-emitting layer and extends between the display area and the bending area;
  • a touch stack disposed on a side of the encapsulation layer away from the substrate, the touch stack including a first insulating layer, a first metal layer, a second insulating layer, a second metal layer stacked in sequence and Touch electrodes are provided in the first refractive layer, the first metal layer or the second metal layer.
  • the present application provides a display panel, including a display area and a non-display area, where the non-display area includes a binding area and a bending area located between the display area and the binding area;
  • the display panel includes:
  • a light-emitting layer disposed on one side of the substrate and located in the display area, the light-emitting layer including a plurality of sub-pixels;
  • a first refractive layer is disposed on a side of the light-emitting layer away from the substrate.
  • the first refractive layer includes a plurality of openings located in the display area, and the plurality of openings correspond to a plurality of the sub-pixels. settings;
  • a second refractive layer covers the side of the first refractive layer away from the substrate and fills the opening.
  • the refractive index of the second refractive layer is greater than the refractive index of the first refractive layer.
  • the birefringent layer extends from the display area to the non-display area and covers the bending area.
  • the display panel provided by the present application, there is a gap between the first refractive layer and the bending area and they are not overlapped.
  • the thickness of the second refractive layer in the display area is smaller than the thickness of the second refractive layer in the bending area.
  • the second refractive layer includes a main body part and a leveling part that are connected, at least part of the main body part is located in the display area, and the leveling part is formed by the main body part along the
  • the display area extends in the direction of the bending area and gradually becomes thinner in thickness, and the thickness of the main body part is equal at various positions.
  • the leveling portion is located between the bending area and the binding area.
  • the display panel further includes a polarizer, the polarizer is disposed on a side of the second refractive layer away from the substrate and is located in the display area, and the main body part is away from the substrate.
  • One side surface of the substrate is in contact with a side surface of the polarizer close to the substrate.
  • the display panel further includes: a blocking wall provided between the bending area and the binding area, and the second refractive layer covers the bending area and extends to Describe the retaining wall.
  • the blocking wall and the first refractive layer are made of the same material.
  • the thickness of the blocking wall and the first refractive layer are the same.
  • the display panel further includes a polarizer, and the polarizer is disposed on a side of the second refractive layer away from the substrate;
  • the polarizer at least covers the first refractive layer, and there is a gap between the polarizer and the bending area and they are not overlapped.
  • the display panel further includes:
  • An encapsulation layer is disposed between the light-emitting layer and the first refractive layer, the encapsulation layer covers the light-emitting layer and extends between the display area and the bending area;
  • a touch stack disposed on a side of the encapsulation layer away from the substrate, the touch stack including a first insulating layer, a first metal layer, a second insulating layer, a second metal layer stacked in sequence and Touch electrodes are provided in the first refractive layer, the first metal layer or the second metal layer.
  • the display panel provided by this application extends the second refractive layer from the display area to the non-display area and covers the bending area.
  • the second refractive layer is used to protect the traces located in the bending area.
  • the birefringent layer can replace the protective adhesive layer located in the bending area in the prior art. Since there is no need to provide a protective adhesive layer, this application does not need to add an additional process for preparing the protective adhesive layer, which is beneficial to saving manufacturing processes and reducing production costs.
  • Figure 1A is a schematic plan view of a display panel in the prior art
  • Figure 1B is a schematic cross-sectional structural diagram of a display panel in the prior art when unfolded
  • Figure 1C is a schematic cross-sectional structural diagram of a display panel in the prior art after being bent
  • Figure 2 is a schematic plan view of a display panel provided by an embodiment of the present application.
  • Figure 3A is a simplified schematic diagram of the first cross-sectional structure of the display panel provided by the embodiment of the present application when it is unfolded;
  • Figure 3B is a schematic cross-sectional structural diagram of the display panel in Figure 3A after being bent;
  • Figure 4 is a detailed schematic diagram of a cross-sectional structure when the display panel provided by the embodiment of the present application is unfolded;
  • Figure 5 is a simplified schematic diagram of the second cross-sectional structure of the display panel provided by the embodiment of the present application when it is unfolded;
  • FIG. 6 is a simplified schematic diagram of the third cross-sectional structure of the display panel when unfolded according to the embodiment of the present application.
  • Display panel AA, display area; NA, non-display area; N1, binding area; N2, bending area; N3, first plane area; N4, second plane area;
  • FIG. 1A is a schematic plan view of a display panel in the prior art
  • FIG. 1B is a schematic cross-sectional view of the display panel in the prior art when unfolded
  • FIG. 1C is a schematic view of the display panel in the prior art. Schematic diagram of the cross-sectional structure of the display panel after bending.
  • the display panel 100' in the prior art includes a substrate 10', a first refractive layer 201', a second refractive layer 202' and a protective adhesive layer 50'.
  • the substrate 10' includes a display area AA' and a non-display area. NA'.
  • the non-display area NA' includes a binding area N1' and a bending area N2' located between the display area AA' and the binding area N1'.
  • the second refractive layer 202' is disposed on one side of the substrate 10' and is located in the display area AA'
  • the protective adhesive layer 50' is disposed on one side of the substrate 10' and is located in the bending area.
  • the area N2' is used to protect the wiring located in the bending area N2' of the display panel 10'.
  • the protective adhesive layer 50' requires a separate process to prepare, resulting in increased costs.
  • the present application provides a display panel.
  • the second refractive layer in the present application extends from the display area of the display panel to the non-display area and covers the bending area.
  • the refractive layer can be used to protect the traces located in the bending area.
  • the second refractive layer can replace the protective adhesive layer 50' located in the bending area N2' in the prior art, because there is no need to provide the protective adhesive layer 50 ', so this application does not need to add another process for preparing the protective adhesive layer 50', which is beneficial to saving the process and reducing the production cost.
  • Figure 2 is a schematic plan view of the display panel provided by an embodiment of the present application
  • Figure 3A is a simplified first cross-sectional structure of the display panel provided by an embodiment of the present application when unfolded.
  • Schematic diagram is a schematic diagram of the cross-sectional structure of the display panel in Figure 3A after bending
  • Figure 4 is a detailed schematic diagram of the cross-sectional structure of the display panel when unfolded according to an embodiment of the present application.
  • the display panel 100 provided by the embodiment of the present application includes a substrate 10, a light-emitting layer 1023, a first refractive layer 201 and a second refractive layer 202.
  • the display panel 100 includes a display area AA and a non-display area NA.
  • the non-display area NA includes a binding area N1 and a bending area N2 located between the display area AA and the binding area N1.
  • the display area AA is an area used for display
  • the binding area N1 is an area used for binding external circuits
  • the bending area N2 can be bent to bend the binding area N1. Fold to the back of the display area AA to achieve a narrow bezel.
  • the “backside” here refers to the non-display surface of the display panel 100 , and the side opposite to the “backside” is the display surface of the display panel 100 .
  • the light-emitting layer 1023 is disposed on one side of the substrate 10 and located in the display area AA.
  • the light-emitting layer 1023 includes a plurality of sub-pixels.
  • the first refractive layer 201 is disposed on a side of the light-emitting layer 1023 away from the substrate 10 .
  • the first refractive layer 201 includes a plurality of openings 2011 located in the display area AA.
  • the plurality of openings 2011 Set corresponding to a plurality of sub-pixels.
  • the second refractive layer 202 covers the side of the first refractive layer 201 away from the substrate 10 and fills the opening 2011 .
  • the refractive index of the second refractive layer 202 is greater than the refractive index of the first refractive layer 201 , so that the light emitted by the light-emitting layer 1023 can pass between the first refractive layer 201 and the second refractive layer 202 .
  • Total reflection occurs at the interface between the screens, causing the light to converge and improve the forward light output, which is beneficial to reducing the display power consumption of the screen.
  • the second refractive layer 202 extends from the display area AA to the non-display area NA and covers the bending area N2.
  • the second refractive layer 202 can protect the lines located in the bending area N2, improving The neutral layer prevents circuit breakage, so the second refractive layer can replace the protective adhesive layer 50' located in the bending area N2' in the prior art. Since there is no need to provide the protective adhesive layer 50', this application There is no need to add an additional process for preparing the protective adhesive layer 50', which is beneficial to saving manufacturing processes and reducing production costs.
  • the display panel 100 includes a flexible display panel.
  • the display panel 100 also includes a driving circuit layer 101 and a display device layer 102.
  • the driving circuit layer 101 is disposed on one side of the substrate 10.
  • the display device layer 102 is disposed on one side of the substrate 10.
  • the driving circuit layer 101 is located on a side away from the substrate 10 and located in the display area AA.
  • the substrate 10 may be made of materials with good flexibility such as polyimide, polycarbonate, polyethylene terephthalate, and silicone.
  • the driving circuit layer 101 includes an active matrix driving circuit or a passive matrix driving circuit.
  • the driving circuit layer 101 includes a plurality of wiring lines extending from the display area AA through the bending area N2 to the Binding area N1.
  • the display device layer 102 includes the light-emitting layer 1023.
  • the display device layer 102 also includes an anode 1021, a pixel definition layer 1022, a hole injection layer, a hole transport layer, an electron transport layer and an electron injection layer, and Cathode, the light-emitting layer 1023 is located within the plurality of pixel openings defined by the pixel definition layer 1022 and between the electron transport layer and the hole transport layer.
  • an encapsulation layer 103 is provided on the side of the display device layer 102 away from the substrate 10 for encapsulating the light-emitting layer 1023.
  • the encapsulation layer 103 mainly connects the light-emitting layer 1023 with The external environment is isolated to prevent the intrusion of moisture, harmful gases, dust, and rays, and to prevent external force damage from causing failure of the organic light-emitting material, stabilize various parameters of the device, and thereby increase the service life of the display panel 100 .
  • a touch stack 104 is also provided on the side of the encapsulation layer 103 away from the substrate 10 .
  • the touch stack 104 is located in the display area AA.
  • the touch stack 104 includes first stacked layers 104 in sequence. Insulating layer 1041, first metal layer 1042, second insulating layer 1043, second metal layer 1044 and the first refractive layer 201, the first metal layer 1042 or the second metal layer 1044 is provided with a touch electrode.
  • the first refractive layer 201 is a part of the touch stack 104 , that is, the first refractive layer 201 is multiplexed as an insulating layer in the touch stack 104 .
  • the touch stack 104 may adopt an on-screen direct cell touch (DOT) method.
  • DOT on-screen direct cell touch
  • the display panel 100 also includes other film layer structures not shown in the figures, such as a cover plate and a barrier layer.
  • the display panel 100 further includes a first back plate 50 and a second back plate 60 for supporting the substrate 10 and the above film layers.
  • the first back plate 50 and the second back plate 60 are arranged oppositely, and the first back plate 50 is located on the side of the substrate 10 facing the second back plate 60 and located in the display area AA,
  • the second back plate 60 is located on the side of the substrate 10 facing the first back plate 50 and is located in the binding area N1, between the first back plate 50 and the second back plate 60 is disconnected.
  • the display panel 100 further includes a buffer layer 70 and a reinforcing plate 80 .
  • the buffer layer 70 and the reinforcing plate 80 are located between the first back plate 50 and the second back plate 60 .
  • the strong plate 80 is located between the second back plate 60 and the buffer layer 70 .
  • the second refractive layer 202 extends from the display area AA to the bending area N2.
  • the material of the second refractive layer 202 is a transparent fluid liquid, which ensures that it does not affect the light output.
  • the portion of the refractive layer 202 extending to the bending area N2 can function as the protective glue layer 50' in the prior art.
  • the first refractive layer 201 is only located in the display area AA, and the first refractive layer 201 is only located in the display area AA.
  • the first refractive layer 201 is not provided in the bending area N2.
  • the display area AA there are film layers such as the encapsulation layer 103, the touch stack 104 and the first refractive layer 201 between the light-emitting layer 1023 and the second refractive layer 202, and The above film layer is only located in the display area AA and is not provided in the bending area N2. Therefore, between the luminescent layer 1023 and the second refractive layer 202, the film layer located in the display area AA The number is actually less than the number of film layers located in the bending area N2, then the thickness of the second refractive layer 202 in the display area AA is smaller than the thickness of the second refractive layer 202 in the bending area N2.
  • the second refractive layer 202 includes a connecting main body part 2021 and a leveling part 2022. At least part of the main body part 2021 is located in the display area AA.
  • the leveling part 2022 is formed by the main body part 2021 along the display area.
  • the area AA extends in the direction of the bending area N2 and gradually becomes thinner.
  • the second refractive layer 202 is prepared through an inkjet printing process. Due to process reasons, the second refractive layer 202 cuts off one end of the printing.
  • the thickness of the main body portion 2021 (that is, the leveling portion 2022 ) is gradually reduced, while the main body portion 2021 is a portion that has not been leveled and has the same thickness at various positions.
  • the display panel 100 also includes a polarizer 30 to increase light transmission and reduce reflection of external light.
  • the polarizer 30 is disposed on a side of the second refractive layer 202 away from the substrate 10 and located in the display area AA, wherein the polarizer 30 at least covers the first refractive layer 201. There is a gap between the polarizer 30 and the bending area N2 and they are not overlapped.
  • a photosensitive adhesive layer may also be disposed between the polarizer 30 and the second refractive layer 202 .
  • the leveling portion 2022 of this application is located in the bending area N2 and is not provided in the display area AA. That is, all the leveling portions 2022 are located outside the polarizer 30 and located on the polarizer. There is only the main body part 2021 on the inside of the sheet 30, and since the thickness of the main body part 2021 is equal at each position, the surface of the main body part 2021 away from the substrate 10 is close to the polarizer 30 One side surface of the substrate 10 is in contact, thereby eliminating the gap between the second refractive layer 202' and the polarizer 30' in the prior art. The polarizer 30 and the second refractive layer There are no bubbles between 202, which is beneficial to improving the display effect of the display panel 100.
  • a first planar area N3 is provided between the bending area N2 and the binding area N1, and both ends of the first planar area N3 are connected to the bending area N2 and the binding area N1 respectively.
  • the driver chip 901 and the flexible circuit provided in the binding area N1 causes contamination and damage.
  • the display panel 100 also includes a blocking wall 40. The blocking wall 40 is disposed in the first planar area N3.
  • the second refractive layer 202 covers the bending area N2 and extends to The blocking wall 40 , that is, the end of the leveling portion 2022 away from the main body portion 2021 contacts the blocking wall 40 , and the leveling portion 2022 stops printing at the blocking wall 40 .
  • the distance between the retaining wall 40 and the display area AA in this application is increased, so that the leveling part 2022 is formed outside the display area AA, which can eliminate the third problem existing in the prior art.
  • the gap between the birefringent layer 202' and the polarizer 30' improves the display effect of the display panel 100.
  • the blocking wall 40 can be formed in the bending area N2 by photolithography, and then the first refractive layer 201 and the second refractive layer 202 are formed.
  • the preparation process of the retaining wall 40 is not limited to this.
  • the blocking wall 40 and the first refractive layer 201 are made of the same material, that is, the blocking wall 40 and the first refractive layer 201 are arranged on the same layer.
  • the first refractive layer 201 is prepared through the same process, which is beneficial to further saving process. Specifically, after the touch stack 104 is prepared, the first refractive layer 201 and the blocking wall 40 are first formed. After that, the second refractive layer 202 is formed on the first refractive layer 201 . In this case, the thickness of the blocking wall 40 and the first refractive layer 201 are the same.
  • the retaining wall 40 is located at the edge of the first plane area N3 close to the binding area N1, which can increase the coverage of the printing area and make space for the leveling part 2022, thereby It is ensured that the leveling portion 2022 is not formed in the display area AA.
  • the size range of the leveling portion 2022 in the direction from the display area AA to the binding area N1 is 2.5 mm to 3 mm. Therefore, the first planar area N3 in this application is in the The size of the display area AA in the direction pointing to the binding area N1 ranges from 3 mm to 4 mm to ensure that the lower frame of the display panel 100 is not increased while leaving enough space for the leveling part 2022 .
  • Figure 5 is a simplified schematic diagram of the second cross-sectional structure of the display panel when unfolded according to an embodiment of the present application.
  • the difference between Figure 5 and Figure 3A is that the leveling portion 2022 is located on the Between the bending area N2 and the binding area N1, the thickness of the second refractive layer 202 located in the bending area N2 is made uniform, so that the traces located in the bending area N2 are evenly stressed. Prevent it from breaking.
  • the retaining wall 40 can have a variety of specific arrangement forms. Specifically, the height of the retaining wall 40 can be 1 ⁇ m-3 ⁇ m, and the width of the retaining wall 40 can be 10 ⁇ m-20 ⁇ m. The specific value of the height of the retaining wall 40 can be set according to actual needs, so that the inkjet will not splash to areas outside the preset printing area during the inkjet printing process.
  • a material with a relatively high viscosity is selected for the second refractive layer 202 to reduce the size of the leveling portion 2022 in the direction in which the display area AA points to the binding area N1.
  • the retaining wall 40 may be made of organic materials, such as any one of acrylic series, epoxy resin series and silicon-based series organic materials.
  • the second refractive layer 202' located in the central area cuts off printing on the inside of the polarizer 30', and is located on the left and right borders.
  • the second refractive layer 202' is printed outside the polarizer 30'.
  • a part of the protective adhesive layer 50' overlaps the second refractive layer 202' located outside, and the other part of the protective adhesive layer 50 ' does not overlap with the second refractive layer 202', then the thickness of the overlapping portion of the protective adhesive layer 50' is greater than the thickness of the non-overlapping portion of the protective adhesive layer 50', causing the protective adhesive layer 50' to
  • the thickness of the bending area N2' is uneven, which causes the traces located in the bending area N2' to be unevenly stressed and prone to breakage.
  • the second refractive layer 202 in this application replaces the protective adhesive layer 50' in the prior art, so there is no overlap between the protective adhesive layer 50' and the second refractive layer 202 in this application, and because this application
  • the thickness of the leveling portion 2022 shows a gentle thinning trend. Compared with the prior art, it can improve the problem that the traces in the bending area N2 are unevenly stressed and prone to breakage.
  • FIG. 6 is a simplified schematic diagram of the third cross-sectional structure when the display panel is unfolded according to an embodiment of the present application.
  • the difference between Figure 6 and Figure 3A is that the first refractive layer 201 and the second refractive layer 202 both extend from the display area AA to the non-display area NA and cover the bending area N2,
  • the blocking wall 40 may be located on the side of the first refractive layer 201 away from the substrate 10 , or may be located on the substrate 10 , and the first refractive layer 201 and the second refractive layer 202 jointly Replacing the protective adhesive layer 50' in the prior art can not only reduce the manufacturing process effect, but also further improve the thickness of the protective adhesive layer 50' in the bending area N2' in the prior art.
  • the beneficial effects are: in the display panel provided by the embodiment of the present application, by extending the second refractive layer from the display area to the non-display area and covering the bending area, the second refractive layer is used to protect the traces located in the bending area.
  • the refractive layer can replace the protective adhesive layer located in the bending area in the prior art. Since there is no need to provide a protective adhesive layer, this application does not need to add an additional process for preparing the protective adhesive layer, which is beneficial to saving manufacturing processes and reducing production costs.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
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Abstract

一种显示面板(100)，显示面板(100)包括衬底(10)、发光层(1023)、第一折射层(201)和第二折射层(202)，第一折射层(201)设置于发光层(1023)远离衬底(10)的一侧，第二折射层(202)覆于第一折射层(201)远离衬底(10)的一侧并填充第一折射层(201)的多个开口(2011)，第二折射层(202)从显示区(AA) 延伸至非显示区(NA)且覆盖弯折区(N2)，用于保护位于弯折区(N2)的走线，能够替代现有技术中的保护胶层，有利于节省制程。

Description

显示面板 技术领域
本申请涉及显示技术领域，尤其涉及一种显示面板。
 背景技术
有机发光二极管（Organic Light-Emitting Diode，OLED）显示产品由于自身存在波导和全反射效应，导致发光效率降低，为了提高发光效率，通常在发光层上增设一层第一折射层和第二折射层，第一折射层的折射率小于第二折射层的折射率，利用第一折射层和第二折射层的界面角度及折射率差异来实现正向出光的提升，降低了屏体显示功耗。此外，通过将显示面板的绑定区弯折至显示区的背面以实现窄边框，为了避免弯折区的走线断裂，通常需要在弯折区设置保护胶层以保护弯折区的走线，但形成保护胶层需要另外增加一道制程，导致成本增加。
 技术问题
本申请实施例提供一种显示面板，以解决现有的显示面板在弯折区设置用于避免走线断裂的保护胶层，需要另外增加一道制程，导致成本增加的技术问题。
 技术解决方案
为解决上述问题，本申请提供的技术方案如下：
本申请提供一种显示面板，包括显示区和非显示区，所述非显示区包括绑定区和位于所述显示区和所述绑定区之间的弯折区；
所述显示面板包括：
衬底；
发光层，设置于所述衬底的一侧且位于所述显示区，所述发光层包括多个子像素；
第一折射层，设置于所述发光层远离所述衬底的一侧，所述第一折射层包括位于所述显示区的多个开口，多个所述开口与多个所述子像素对应设置；
第二折射层，覆于所述第一折射层远离所述衬底的一侧并填充所述开口，所述第二折射层的折射率大于所述第一折射层的折射率，所述第二折射层从所述显示区延伸至所述非显示区且覆盖所述弯折区；以及
第一背板和第二背板，所述第一背板位于所述衬底朝向所述第二背板的一侧且位于所述显示区，所述第二背板位于所述衬底朝向所述第一背板的一侧且位于所述绑定区。
根据本申请提供的显示面板，所述第一折射层与所述弯折区之间存在间隔且不重叠设置。
根据本申请提供的显示面板，所述第二折射层在所述显示区的厚度小于所述第二折射层在所述弯折区的厚度。
根据本申请提供的显示面板，所述第二折射层包括相接的主体部和流平部，至少部分所述主体部位于所述显示区，所述流平部由所述主体部沿所述显示区指向所述弯折区的方向延伸形成且厚度逐渐减薄，所述主体部在各个位置处的厚度相等。
根据本申请提供的显示面板，所述流平部位于所述弯折区和所述绑定区之间。
根据本申请提供的显示面板，所述显示面板还包括偏光片，所述偏光片设置于所述第二折射层远离所述衬底的一侧且位于所述显示区，所述主体部远离所述衬底的一侧表面与所述偏光片靠近所述衬底的一侧表面相接触。
根据本申请提供的显示面板，所述显示面板还包括：设置于所述弯折区和所述绑定区之间的挡墙，所述第二折射层覆盖所述弯折区并延伸至所述挡墙。
根据本申请提供的显示面板，所述挡墙与所述第一折射层采用相同材料。
根据本申请提供的显示面板，，所述显示面板还包括：
封装层，设置于所述发光层和所述第一折射层之间，所述封装层覆盖所述发光层并延伸至所述显示区和所述弯折区之间；以及
触控叠构，设置于所述封装层远离所述衬底的一侧，所述触控叠构包括依次堆叠的第一绝缘层、第一金属层、第二绝缘层、第二金属层和所述第一折射层，所述第一金属层或所述第二金属层中设置有触控电极。
本申请提供一种显示面板，包括显示区和非显示区，所述非显示区包括绑定区和位于所述显示区和所述绑定区之间的弯折区；
所述显示面板包括：
衬底；
发光层，设置于所述衬底的一侧且位于所述显示区，所述发光层包括多个子像素；
第一折射层，设置于所述发光层远离所述衬底的一侧，所述第一折射层包括位于所述显示区的多个开口，多个所述开口与多个所述子像素对应设置；以及
第二折射层，覆于所述第一折射层远离所述衬底的一侧并填充所述开口，所述第二折射层的折射率大于所述第一折射层的折射率，所述第二折射层从所述显示区延伸至所述非显示区且覆盖所述弯折区。
根据本申请提供的显示面板，所述第一折射层与所述弯折区之间存在间隔且不重叠设置。
根据本申请提供的显示面板，所述第二折射层在所述显示区的厚度小于所述第二折射层在所述弯折区的厚度。
根据本申请提供的显示面板，所述第二折射层包括相接的主体部和流平部，至少部分所述主体部位于所述显示区，所述流平部由所述主体部沿所述显示区指向所述弯折区的方向延伸形成且厚度逐渐减薄，所述主体部在各个位置处的厚度相等。
根据本申请提供的显示面板，所述流平部位于所述弯折区和所述绑定区之间。
根据本申请提供的显示面板，所述显示面板还包括偏光片，所述偏光片设置于所述第二折射层远离所述衬底的一侧且位于所述显示区，所述主体部远离所述衬底的一侧表面与所述偏光片靠近所述衬底的一侧表面相接触。
根据本申请提供的显示面板，所述显示面板还包括：设置于所述弯折区和所述绑定区之间的挡墙，所述第二折射层覆盖所述弯折区并延伸至所述挡墙。
根据本申请提供的显示面板，所述挡墙与所述第一折射层采用相同材料。
根据本申请提供的显示面板，所述挡墙与所述第一折射层的厚度相同。
根据本申请提供的显示面板，所述显示面板还包括偏光片，所述偏光片设置于所述第二折射层远离所述衬底的一侧；
其中，所述偏光片至少覆盖所述第一折射层，所述偏光片与所述弯折区之间存在间隔且不重叠设置。
根据本申请提供的显示面板，所述显示面板还包括：
封装层，设置于所述发光层和所述第一折射层之间，所述封装层覆盖所述发光层并延伸至所述显示区和所述弯折区之间；以及
触控叠构，设置于所述封装层远离所述衬底的一侧，所述触控叠构包括依次堆叠的第一绝缘层、第一金属层、第二绝缘层、第二金属层和所述第一折射层，所述第一金属层或所述第二金属层中设置有触控电极。
 有益效果
本申请的有益效果为：本申请提供的显示面板，通过将第二折射层从显示区延伸至非显示区且覆盖弯折区，第二折射层用于保护位于弯折区的走线，第二折射层能够替代现有技术中位于弯折区的保护胶层，由于无需设置保护胶层，故本申请无需另外增加一道制备保护胶层的制程，有利于节省制程，降低了生产成本。
 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申请的一些实施例，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1A是现有技术中的显示面板的平面结构示意图；
图1B是现有技术中的显示面板展开时的截面结构示意图；
图1C是现有技术中的显示面板弯折后的截面结构示意图；
图2是本申请实施例提供的显示面板的平面结构示意图；
图3A是本申请实施例提供的显示面板展开时的第一种截面结构简化示意图；
图3B是图3A中的显示面板弯折后的截面结构示意图；
图4是本申请实施例提供的显示面板展开时的一种截面结构详细示意图；
图5是本申请实施例提供的显示面板展开时的第二种截面结构简化示意图；
图6是本申请实施例提供的显示面板展开时的第三种截面结构简化示意图。
附图标记说明：
100’、显示面板；AA’、显示区；NA’、非显示区；N1’、绑定区；N2’、弯折区；N3’、第一平面区；N4’、第二平面区；10’、衬底；201’、第一折射层；202’、第二折射层；2022’、流平部；30’、偏光片；40’、挡墙；50’、保护胶层；
100、显示面板；AA、显示区；NA、非显示区；N1、绑定区；N2、弯折区；N3、第一平面区；N4、第二平面区；
10、衬底；101、驱动电路层；102、显示器件层；1021、阳极；1022、像素定义层；1023、发光层；103、封装层；104、触控叠构；1041、第一绝缘层；1042、第一金属层；1043、第二绝缘层；1044、第二金属层；201、第一折射层；2011、开口；202、第二折射层；2021、主体部；2022、流平部；30、偏光片；40、挡墙；50、第一背板；60、第二背板；70、缓冲层；80、补强板；901、驱动芯片；902、柔性电路板。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。此外，应当理解的是，此处所描述的具体实施方式仅用于说明和解释本申请，并不用于限制本申请。在本申请中，在未作相反说明的情况下，使用的方位词如“上”和“下”通常是指装置实际使用或工作状态下的上和下，具体为附图中的图面方向；而“内”和“外”则是针对装置的轮廓而言的。
请参阅图1A、图1B和图1C，图1A是现有技术中的显示面板的平面结构示意图；图1B是现有技术中的显示面板展开时的截面结构示意图；图1C是现有技术中的显示面板弯折后的截面结构示意图。
现有技术中的显示面板100’包括衬底10’、第一折射层201’、第二折射层202’和保护胶层50’，所述衬底10’包括显示区AA’和非显示区NA’。所述非显示区NA’包括绑定区N1’和位于所述显示区AA’和所述绑定区N1’之间的弯折区N2’。所述第二折射层202’设置于所述衬底10’一侧且位于所述显示区AA’，所述保护胶层50’设置于所述衬底10’一侧且位于所述弯折区N2’，用于保护所述显示面板10’中位于所述弯折区N2’的走线，所述保护胶层50’需要单独的一道制程制备，导致成本增加。
有鉴于此，本申请提供一种显示面板，相较于现有技术，本申请中的第二折射层从显示面板的显示区延伸至所述非显示区且覆盖所述弯折区，第二折射层可以用于保护位于弯折区的走线，第二折射层能够替代现有技术中位于所述弯折区N2’的所述保护胶层50’，由于无需设置所述保护胶层50’，故本申请无需另外增加一道制备所述保护胶层50’的制程，有利于节省制程，降低了生产成本。
为了更好地理解本申请的技术方案和技术效果，以下将结合附图对具体的实施例进行详细的描述。
请参阅图2、图3A、图3B和图4，图2是本申请实施例提供的显示面板的平面结构示意图；图3A是本申请实施例提供的显示面板展开时的第一种截面结构简化示意图；图3B是图3A中的显示面板弯折后的截面结构示意图；图4是本申请实施例提供的显示面板展开时的一种截面结构详细示意图。
本申请实施例提供的显示面板100包括衬底10、发光层1023、第一折射层201和第二折射层202，所述显示面板100包括显示区AA和非显示区NA。所述非显示区NA包括绑定区N1和位于所述显示区AA和所述绑定区N1之间的弯折区N2。所述显示区AA为用于进行显示的区域，所述绑定区N1为用于绑定外部电路的区域，所述弯折区N2可以进行弯折，用于将所述绑定区N1弯折至所述显示区AA的背面，以实现窄边框。这里的“背面”是指所述显示面板100的非显示面，而与“背面”相对而言的一面为所述显示面板100的显示面。
所述发光层1023设置于所述衬底10的一侧且位于所述显示区AA，所述发光层1023包括多个子像素。所述第一折射层201设置于所述发光层1023远离所述衬底10的一侧，所述第一折射层201包括位于所述显示区AA的多个开口2011，多个所述开口2011与多个所述子像素对应设置。所述第二折射层202覆于所述第一折射层201远离所述衬底10的一侧并填充所述开口2011。所述第二折射层202的折射率大于所述第一折射层201的折射率，以使所述发光层1023发出的光线能够在所述第一折射层201和所述第二折射层202之间的界面处发生全反射，从而使得光线发生汇聚，实现正向出光提升，有利于降低屏体显示功耗。
所述第二折射层202从所述显示区AA延伸至所述非显示区NA且覆盖所述弯折区N2，所述第二折射层202能够保护位于所述弯折区N2的线路，提升中性层，避免线路发生断裂，故所述第二折射层能够替代现有技术中位于所述弯折区N2’的保护胶层50’，由于无需设置所述保护胶层50’，本申请无需另外增加一道制备所述保护胶层50’的制程，有利于节省制程，降低了生产成本。
所述显示面板100包括柔性显示面板，所述显示面板100还包括驱动电路层101和显示器件层102，所述驱动电路层101设置于所述衬底10一侧，所述显示器件层102设置于所述驱动电路层101远离所述衬底10的一侧且位于所述显示区AA。所述衬底10的材料可以为聚酰亚胺、聚碳酸脂、聚对苯二甲酸乙二醇酯、硅胶等具有良好柔韧性的材料。所述驱动电路层101包括主动矩阵驱动电路或者被动矩阵驱动电路，所述驱动电路层101包括多条走线，所述走线从所述显示区AA经过所述弯折区N2延伸至所述绑定区N1。所述显示器件层102包括所述发光层1023，具体地，所述显示器件层102还包括阳极1021、像素定义层1022、空穴注入层、空穴传输层、电子传输层和电子注入层和阴极，所述发光层1023位于所述像素定义层1022定义出的多个像素开口内且位于所述电子传输层和所述空穴传输层之间。
进一步地，所述显示器件层102远离所述衬底10的一侧还设置有封装层103，用于对所述发光层1023进行封装，所述封装层103主要是将所述发光层1023与外界环境隔离，以防水分、有害气体、尘埃及射线的侵入并防止外力损伤而引起有机发光材料失效，稳定器件的各项参数，进而提高所述显示面板100的使用寿命。
所述封装层103远离所述衬底10的一侧还设置有触控叠构104，所述触控叠构104位于所述显示区AA，所述触控叠构104包括依次堆叠的第一绝缘层1041、第一金属层1042、第二绝缘层1043、第二金属层1044和所述第一折射层201，所述第一金属层1042或所述第二金属层1044中设置有触控电极。在本申请实施例中，所述第一折射层201为所述触控叠构104的一部分，也即所述第一折射层201复用为所述触控叠构104中的绝缘层，因此，在所述第一折射层201和所述第二金属层1044之间无需另外设置一层覆盖所述第二金属层1044的绝缘层，能够降低所述显示面板100的整体厚度。所述触控叠构104可以采用屏上直接触控（Direct cell touch，DOT）方式。
需要说明的是，虽然未图示，所述显示面板100还包括盖板、阻隔层等未图示的其他膜层结构。
请继续参阅图3B，所述显示面板100还包括第一背板50和第二背板60，用于支撑所述衬底10及以上膜层。所述第一背板50和所述第二背板60相对设置，所述第一背板50位于所述衬底10朝向所述第二背板60的一侧且位于所述显示区AA，所述第二背板60位于所述衬底10朝向所述第一背板50的一侧且位于所述绑定区N1，所述第一背板50和所述第二背板60之间是断开的。
所述显示面板100还包括缓冲层70和补强板80，所述缓冲层70和所述补强板80位于所述第一背板50和所述第二背板60之间，所述补强板80位于所述第二背板60和所述缓冲层70之间。
所述第二折射层202从所述显示区AA延伸至所述弯折区N2，所述第二折射层202的材料为透明流动性液体，在保证不会影响出光的同时，所述第二折射层202延伸至所述弯折区N2的部分能够起到现有技术中的保护胶层50’的作用。
在本申请实施例中，所述第一折射层201与所述弯折区N2之间存在间隔且不重叠设置，也即所述第一折射层201仅位于所述显示区AA，而所述弯折区N2未设置所述第一折射层201。
由于在所述显示区AA，所述发光层1023和所述第二折射层202之间存在所述封装层103、所述触控叠构104和所述第一折射层201等膜层，且上述膜层仅位于所述显示区AA，而在所述弯折区N2未设置，因此，在所述发光层1023和所述第二折射层202之间，位于所述显示区AA的膜层数量实际上小于位于所述弯折区N2的膜层数量，则所述第二折射层202在所述显示区AA的厚度小于所述第二折射层202在所述弯折区N2的厚度。
所述第二折射层202包括相接的主体部2021和流平部2022，至少部分所述主体部2021位于所述显示区AA，所述流平部2022由所述主体部2021沿所述显示区AA指向所述弯折区N2的方向延伸形成且厚度逐渐减薄，所述第二折射层202通过喷墨打印工艺制备而成，由于工艺原因，所述第二折射层202截止打印的一端（即所述流平部2022）的厚度逐渐减薄，而所述主体部2021为未发生流平的部分，其在各个位置处的厚度相等。
所述显示面板100还包括偏光片30，以增加透光和减少外界光的反射。所述偏光片30设置于所述第二折射层202远离所述衬底10的一侧且位于所述显示区AA，其中，所述偏光片30至少覆盖所述第一折射层201，所述偏光片30与所述弯折区N2之间存在间隔且不重叠设置。所述偏光片30和所述第二折射层202之间还可以设置有感光胶层。
请再次参阅图1A、图1B和图1C，申请人还发现，现有技术中，第二折射层202’的流平部2022’的一部分位于所述偏光片30’内侧，另一部分位于所述偏光片30’外侧，由于所述流平部2022’沿所述显示区AA’指向所述弯折区N2’的方向的厚度呈逐渐减薄的趋势，导致位于所述偏光片30’内侧的所述流平部2022’与所述偏光片30’之间存在间隙，容易引起气泡在该间隙内发生堆积，从而导致所述显示面板100’的显示效果变差。
而本申请的所述流平部2022位于所述弯折区N2，而未设置于所述显示区AA，也即所有所述流平部2022均位于所述偏光片30外侧，位于所述偏光片30内侧的仅有所述主体部2021，又由于所述主体部2021在各个位置处的厚度相等，使得所述主体部2021远离所述衬底10的一侧表面与所述偏光片30靠近所述衬底10的一侧表面相接触，从而消除现有技术中所述第二折射层202’与所述偏光片30’之间的间隙，所述偏光片30与所述第二折射层202之间不存在气泡，有利于提升所述显示面板100的显示效果。
所述弯折区N2和所述绑定区N1之间设置有第一平面区N3，所述第一平面区N3的两端分别与所述弯折区N2和所述绑定区N1相接。为了对所述流平部2022的流平距离进行限制，且避免在喷墨打印时避免打印溶剂扩散到所述绑定区N1而对设置于所述绑定区N1的驱动芯片901和柔性电路板902造成污染和损坏，所述显示面板100还包括挡墙40，所述挡墙40设置于所述第一平面区N3，所述第二折射层202覆盖所述弯折区N2并延伸至所述挡墙40，即，所述流平部2022远离所述主体部2021的一端与所述挡墙40接触，所述流平部2022在所述挡墙40处截止打印。相较于现有技术中的位于所述弯折区N2’或所述显示区AA’和所述弯折区N2’之间的区域（即第二平面区N4’）的所述挡墙40’，本申请中的所述挡墙40与所述显示区AA的距离增大，使得所述流平部2022形成于所述显示区AA之外，能够消除现有技术中存在的所述第二折射层202’与所述偏光片30’之间的间隙，提升所述显示面板100的显示效果。
在实际制备过程中，可以在所述弯折区N2通过光刻的方式形成所述挡墙40，之后，再形成所述第一折射层201和所述第二折射层202。当然地，所述挡墙40的制备工艺不限于此。在本申请中，所述挡墙40与所述第一折射层201采用同种材料，即，所述挡墙40与所述第一折射层201同层设置，所述挡墙40与所述第一折射层201通过同一道制程制备而成，有利于进一步节省制程，具体地，在所述触控叠构104制备完成之后，首先形成所述第一折射层201和所述挡墙40，之后，再在所述第一折射层201上形成所述第二折射层202。在此种情况下，所述挡墙40与所述第一折射层201的厚度相同。
进一步地，所述挡墙40位于所述第一平面区N3靠近所述绑定区N1的一侧边缘，可以增大打印区域的覆盖范围，为所述流平部2022让出设置空间，从而保证所述流平部2022未形成于所述显示区AA。一般地，所述流平部2022在所述显示区AA指向所述绑定区N1方向上的尺寸范围为2.5毫米~3毫米，因此，本申请中的所述第一平面区N3在所述显示区AA指向所述绑定区N1方向上的尺寸范围为3毫米~4毫米，以保证不增加所述显示面板100下边框的同时，能够为所述流平部2022留出足够空间。
进一步地，请参阅图5，图5是本申请实施例提供的显示面板展开时的第二种截面结构简化示意图，图5与图3A的不同之处在于，所述流平部2022位于所述弯折区N2和所述绑定区N1之间，使得位于所述弯折区N2的所述第二折射层202的厚度均一，从而使得位于所述弯折区N2的走线受力均匀，避免其发生断裂。
请继续参阅图3A，所述挡墙40可以有多种具体的设置形式，具体地，所述挡墙40的高度可以为1μm-3μm，且所述挡墙40的宽度可以为10μm-20μm。所述挡墙40的高度的具体数值可以根据实际需求设定，旨在达到在喷墨打印的过程中喷墨不会喷溅到预设打印区域以外的区域即可。
具体地，所述第二折射层202选用粘度较高的材料，以减小所述流平部2022在所述显示区AA指向所述绑定区N1方向上的尺寸。
具体地，所述挡墙40的材料可以采用有机材料，例如亚克力系列、环氧树脂系列和硅基系列的有机材料中的任意一种。
请再次参阅图1A、图1B和图1C，申请人还发现，在现有技术中，位于中央区域的所述第二折射层202’在所述偏光片30’内侧截止打印，而位于左右边框的所述第二折射层202’在所述偏光片30’外侧截止打印，一部分所述保护胶层50’与位于外侧的所述第二折射层202’重叠，另一部分所述保护胶层50’与所述第二折射层202’不重叠，则所述保护胶层50’重叠部分的厚度大于所述保护胶层50’未重叠部分的厚度，导致所述保护胶层50’在所述弯折区N2’的厚度不均，从而引起位于所述弯折区N2’的走线受力不均而容易发生断裂。
而本申请中的第二折射层202取代了现有技术中的保护胶层50’，故不存在保护胶层50’与本申请中的第二折射层202发生重叠的部分，且由于本申请中的所述流平部2022的厚度呈现平缓减薄趋势，相较于现有技术，能够改善位于所述弯折区N2的走线受力不均而容易发生断裂的不良情况。
在一种实施例中，请参阅图6，图6是本申请实施例提供的显示面板展开时的第三种截面结构简化示意图。图6与图3A的不同之处在于，所述第一折射层201和所述第二折射层202均从所述显示区AA延伸至所述非显示区NA且覆盖所述弯折区N2，所述挡墙40可以位于所述第一折射层201远离所述衬底10的一侧，也可以位于所述衬底10上，所述第一折射层201和所述第二折射层202共同替代现有技术中的所述保护胶层50’，在起到减少制程效果的同时，还能够进一步起到改善现有技术中的保护胶层50’在所述弯折区N2’的厚度不均、消除所述第二折射层202’与所述偏光片30’之间的间隙的效果，具体可参照上述描述。
有益效果为：本申请实施例提供的显示面板，通过将第二折射层从显示区延伸至非显示区且覆盖弯折区，第二折射层用于保护位于弯折区的走线，第二折射层能够替代现有技术中位于弯折区的保护胶层，由于无需设置保护胶层，故本申请无需另外增加一道制备保护胶层的制程，有利于节省制程，降低了生产成本。
综上所述，虽然本申请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申请，本领域的普通技术人员，在不脱离本申请的精神和范围内，均可作各种更动与润饰，因此本申请的保护范围以权利要求界定的范围为准。

Claims (20)

  1. 一种显示面板，包括显示区和非显示区，所述非显示区包括绑定区和位于所述显示区和所述绑定区之间的弯折区；
    所述显示面板包括：
    衬底；
    发光层，设置于所述衬底的一侧且位于所述显示区，所述发光层包括多个子像素；
    第一折射层，设置于所述发光层远离所述衬底的一侧，所述第一折射层包括位于所述显示区的多个开口，多个所述开口与多个所述子像素对应设置；
    第二折射层，覆于所述第一折射层远离所述衬底的一侧并填充所述开口，所述第二折射层的折射率大于所述第一折射层的折射率，所述第二折射层从所述显示区延伸至所述非显示区且覆盖所述弯折区；以及
    第一背板和第二背板，所述第一背板位于所述衬底朝向所述第二背板的一侧且位于所述显示区，所述第二背板位于所述衬底朝向所述第一背板的一侧且位于所述绑定区。
  2. 根据权利要求1所述的显示面板，其中，所述第一折射层与所述弯折区之间存在间隔且不重叠设置。
  3. 根据权利要求2所述的显示面板，其中，所述第二折射层在所述显示区的厚度小于所述第二折射层在所述弯折区的厚度。
  4. 根据权利要求3所述的显示面板，其中，所述第二折射层包括相接的主体部和流平部，至少部分所述主体部位于所述显示区，所述流平部由所述主体部沿所述显示区指向所述弯折区的方向延伸形成且厚度逐渐减薄，所述主体部在各个位置处的厚度相等。
  5. 根据权利要求4所述的显示面板，其中，所述流平部位于所述弯折区和所述绑定区之间。
  6. 根据权利要求4所述的显示面板，其中，所述显示面板还包括偏光片，所述偏光片设置于所述第二折射层远离所述衬底的一侧且位于所述显示区，所述主体部远离所述衬底的一侧表面与所述偏光片靠近所述衬底的一侧表面相接触。
  7. 根据权利要求1所述的显示面板，其中，所述显示面板还包括：设置于所述弯折区和所述绑定区之间的挡墙，所述第二折射层覆盖所述弯折区并延伸至所述挡墙。
  8. 根据权利要求7所述的显示面板，其中，所述挡墙与所述第一折射层采用相同材料。
  9. 根据权利要求1所述的显示面板，其中，所述显示面板还包括：
    封装层，设置于所述发光层和所述第一折射层之间，所述封装层覆盖所述发光层并延伸至所述显示区和所述弯折区之间；以及
    触控叠构，设置于所述封装层远离所述衬底的一侧，所述触控叠构包括依次堆叠的第一绝缘层、第一金属层、第二绝缘层、第二金属层和所述第一折射层，所述第一金属层或所述第二金属层中设置有触控电极。
  10. 一种显示面板，包括显示区和非显示区，所述非显示区包括绑定区和位于所述显示区和所述绑定区之间的弯折区；
    所述显示面板包括：
    衬底；
    发光层，设置于所述衬底的一侧且位于所述显示区，所述发光层包括多个子像素；
    第一折射层，设置于所述发光层远离所述衬底的一侧，所述第一折射层包括位于所述显示区的多个开口，多个所述开口与多个所述子像素对应设置；以及
    第二折射层，覆于所述第一折射层远离所述衬底的一侧并填充所述开口，所述第二折射层的折射率大于所述第一折射层的折射率，所述第二折射层从所述显示区延伸至所述非显示区且覆盖所述弯折区。
  11. 根据权利要求10所述的显示面板，其中，所述第一折射层与所述弯折区之间存在间隔且不重叠设置。
  12. 根据权利要求11所述的显示面板，其中，所述第二折射层在所述显示区的厚度小于所述第二折射层在所述弯折区的厚度。
  13. 根据权利要求12所述的显示面板，其中，所述第二折射层包括相接的主体部和流平部，至少部分所述主体部位于所述显示区，所述流平部由所述主体部沿所述显示区指向所述弯折区的方向延伸形成且厚度逐渐减薄，所述主体部在各个位置处的厚度相等。
  14. 根据权利要求13所述的显示面板，其中，所述流平部位于所述弯折区和所述绑定区之间。
  15. 根据权利要求13所述的显示面板，其中，所述显示面板还包括偏光片，所述偏光片设置于所述第二折射层远离所述衬底的一侧且位于所述显示区，所述主体部远离所述衬底的一侧表面与所述偏光片靠近所述衬底的一侧表面相接触。
  16. 根据权利要求10所述的显示面板，其中，所述显示面板还包括：设置于所述弯折区和所述绑定区之间的挡墙，所述第二折射层覆盖所述弯折区并延伸至所述挡墙。
  17. 根据权利要求16所述的显示面板，其中，所述挡墙与所述第一折射层采用相同材料。
  18. 根据权利要求16所述的显示面板，其中，所述挡墙与所述第一折射层的厚度相同。
  19. 根据权利要求10所述的显示面板，其中，所述显示面板还包括偏光片，所述偏光片设置于所述第二折射层远离所述衬底的一侧；
    其中，所述偏光片至少覆盖所述第一折射层，所述偏光片与所述弯折区之间存在间隔且不重叠设置。
  20. 根据权利要求10所述的显示面板，其中，所述显示面板还包括：
    封装层，设置于所述发光层和所述第一折射层之间，所述封装层覆盖所述发光层并延伸至所述显示区和所述弯折区之间；以及
    触控叠构，设置于所述封装层远离所述衬底的一侧，所述触控叠构包括依次堆叠的第一绝缘层、第一金属层、第二绝缘层、第二金属层和所述第一折射层，所述第一金属层或所述第二金属层中设置有触控电极。
PCT/CN2022/102245 2022-06-14 2022-06-29 显示面板 WO2023240690A1 (zh)

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