WO2021189542A1 - 显示面板及显示装置 - Google Patents

显示面板及显示装置 Download PDF

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Publication number
WO2021189542A1
WO2021189542A1 PCT/CN2020/084084 CN2020084084W WO2021189542A1 WO 2021189542 A1 WO2021189542 A1 WO 2021189542A1 CN 2020084084 W CN2020084084 W CN 2020084084W WO 2021189542 A1 WO2021189542 A1 WO 2021189542A1
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WO
WIPO (PCT)
Prior art keywords
area
display panel
hollowed
flexible substrate
bending
Prior art date
Application number
PCT/CN2020/084084
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English (en)
French (fr)
Inventor
祝翠林
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 EP20750162.8A priority Critical patent/EP4131450A4/en
Priority to US16/759,741 priority patent/US20220045135A1/en
Publication of WO2021189542A1 publication Critical patent/WO2021189542A1/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
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • G06F1/1652—Details related to the display arrangement, including those related to the mounting of the display in the housing the display being flexible, e.g. mimicking a sheet of paper, or rollable
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1656—Details related to functional adaptations of the enclosure, e.g. to provide protection against EMI, shock, water, or to host detachable peripherals like a mouse or removable expansions units like PCMCIA cards, or to provide access to internal components for maintenance or to removable storage supports like CDs or DVDs, or to mechanically mount accessories
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/842—Containers
    • H10K50/8426—Peripheral sealing arrangements, e.g. adhesives, sealants
    • 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
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/871—Self-supporting sealing arrangements
    • H10K59/8722—Peripheral sealing arrangements, e.g. adhesives, sealants
    • 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
    • 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
    • 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
    • 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
    • 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

  • This application relates to the field of display technology, in particular to a display panel and a display device.
  • the CG (cover glass) bonding process is required.
  • the traditional bonding process is developing towards the curved surface bonding process.
  • the current display panel is in the curved surface bonding process, refer to As shown in Figures 1 and 2, the corners of the laminate, including the flexible substrate 800, the adhesive layer 400, and the pixel array 500, are thicker, and the deformation of the laminate between the bending parts causes stress concentration. As a result, the display panel laminates are broken or peeled off between the laminates, thereby causing the problem of poor display of the display panel.
  • the embodiments of the present application provide a display panel and a display device, aiming to solve the problem of stress concentration caused by the deformation of the bonding between the laminates during the bending process of the display panel, which may easily cause the display panel laminate to break or peel off between the laminates, thereby causing the display
  • the panel shows the problem of bad.
  • This application provides a display panel, including:
  • a flexible substrate comprising a first area, a second area, and a bending area located between the first area and the second area provided at the bottom of the pixel array;
  • the bending area of the flexible substrate is completely or partially hollowed out along the bending direction;
  • the display panel further includes an adhesive layer disposed between the flexible substrate and the pixel array, and an area on the adhesive layer corresponding to the bending area is completely or partially hollowed out along the bending direction,
  • the hollowed-out area is filled with a protective layer.
  • the thickness of the protective layer does not exceed the depth of the hollowed out area.
  • This application also provides a display panel, including:
  • the pixel array includes: a thin film transistor layer, an anode, an OLED light-emitting layer, and a cathode that are sequentially stacked from top to bottom;
  • the flexible substrate includes a first area, a second area, and a bending area located at the bottom of the pixel array, and the flexible substrate may be PET (Polyethylene terephthalate, polyethylene terephthalate) materials;
  • the bending area of the flexible substrate is completely or partially hollowed out along the bending direction.
  • the above-mentioned display panel further includes an adhesive layer disposed between the flexible substrate and the pixel array, and the adhesive layer may be an optical adhesive (Optically Clear Adhesive, OCA), the adhesive layer at the corresponding position of the bending zone is hollowed out completely or partially along the arc direction.
  • OCA Optically Clear Adhesive
  • the above-mentioned display panel further includes a protective layer filled in the hollowed out area.
  • the thickness of the protective layer of the above-mentioned display panel does not exceed the depth of the hollowed out area.
  • the protective layer is ultraviolet photosensitive adhesive.
  • the cross-sectional shape of the hollowed-out area is one or more of a trapezoid, a semicircle, or a rectangle.
  • the number of hollowed-out areas is one.
  • the number of hollowed-out areas is multiple and arranged in a non-contiguous manner.
  • the width of the cross-section of the hollowed-out area is not greater than the width of the curved area.
  • the present application also provides a display device, including a display panel, the display panel including:
  • a flexible substrate comprising a first area, a second area, and a bending area located between the first area and the second area provided at the bottom of the pixel array;
  • the bending area of the flexible substrate is completely or partially hollowed out along the bending direction.
  • the adhesive layer further includes an adhesive layer disposed between the flexible substrate and the pixel array, and the area on the adhesive layer corresponding to the bending area is completely or partially hollowed out along the bending direction.
  • the hollowed-out area is filled with a protective layer.
  • the thickness of the protective layer does not exceed the depth of the hollowed out area.
  • the protective layer is ultraviolet photosensitive adhesive.
  • the cross-sectional shape of the hollowed-out area is one or more of trapezoidal, semicircular, and rectangular.
  • the number of hollowed-out areas is one.
  • the number of hollowed-out areas is multiple and arranged in a non-contiguous manner.
  • the width of the cross-section of the hollowed-out area is not greater than the width of the bending area.
  • a hollow area is formed at the flexible substrate portion corresponding to the bending area, so that the total thickness of the display panel product in the bending area is reduced, and the bending process of the display panel product is prevented.
  • the bonding deformation between the middle laminates leads to the fracture or peeling caused by the stress concentration, so as to solve the problem of poor display of the display panel due to the display panel laminate fracture or peeling between the laminates; the bent flexible substrate is in the main For protection, in the technical solution of the present application, hollowing out the flexible substrate in this area has no effect on the display effect.
  • the adhesive layer at the corresponding position of the bending area is hollowed out completely or partially along the bending direction to further reduce the total thickness of the finished display panel in the bending area and prevent stress concentration. Therefore, the problem of poor display in the bending area of the flexible display panel is solved.
  • the adhesive layer mainly serves to bond the flexible substrate and the pixel array. When the flexible substrate in this area has been hollowed out, the adhesive layer in this area is further hollowed out. Laminating will not have a negative impact on the display effect, nor will it have a negative impact on the adhesion between the layers.
  • a protective layer is filled in the hollowed out area to provide isolation and protect the product from external damage; in the embodiment, the thickness of the protective layer is different. Exceeding the depth of the hollowed-out area, the total thickness of the finished display panel in the bending area is reduced; the UV photosensitive adhesive used in the protective layer in the embodiment of this application, due to the characteristics of the material, will cause bending when the display panel is bent.
  • the bending stress is less than the bending stress generated by the flexible substrate and the adhesive layer, so as to avoid the display panel laminate breaking or peeling between the laminates, which will cause the display panel to display poorly; the width of the hollowed-out area is not greater than the bending area Width, so that the performance of the non-bending area of the display panel is not affected.
  • FIG. 1 is a partial structural diagram of a display panel in the prior art in a non-bending state
  • FIG. 2 is a schematic diagram of a part of the structure of a display panel in a bent state in the prior art
  • FIG. 3 is a schematic diagram of an embodiment of a display panel provided by an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of another embodiment of a display panel provided by an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of another embodiment of a display panel provided by an embodiment of the present invention.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with “first” and “second” may explicitly or implicitly include one or more of the features. In the description of the present application, “multiple” means two or more than two, unless otherwise specifically defined.
  • FIG. 3 is a schematic structural diagram of a first display panel in an embodiment of the application, where the display panel includes: a pixel array 500 and a flexible substrate 800.
  • the pixel array 500 includes a thin film transistor layer, an anode, an OLED light-emitting layer, and a cathode (not shown) that are sequentially stacked from top to bottom.
  • the flexible substrate 800 includes a first area 100 and a second area 300 disposed at the bottom of the pixel array 500 and a bending area 200 located between the first area 100 and the second area 300.
  • the flexible substrate material is PET (Polyethylene terephthalate, polyethylene terephthalate), or polyimide.
  • the bending area of the flexible substrate 800 is completely or partially hollowed out along the arc direction, and the hollowed part forms a groove 600.
  • one groove 600 may be provided, or a plurality of grooves 600 may be provided in a non-continuous arrangement. In this embodiment, the number of grooves 600 is one.
  • the cross-sectional shape of the groove 600 is one of trapezoidal, semi-circular, or rectangular, and can also be other shapes. It should be noted that the cross-sectional shape of the groove 600 is that of the flexible substrate 800 in the unbent state. Shape, the cross-sectional shape of the groove 600 in this embodiment is rectangular.
  • the bending angle of the bending area 200 is 90°.
  • the width of the cross-section of the groove 600 is not greater than the width of the bending area. In a preferred embodiment, the width of the cross-section of the groove 600 is equal to the width of the bending area 200. The smallest.
  • a thin film packaging layer, a touch layer, a polarizer, and a protective cover plate are stacked on the pixel array 500.
  • the flexible substrate 800 is provided with a back plate and a copper film graphite foam layer (Copper&Graphite&Foam) (not shown) on the side facing away from the pixel array 500.
  • the display panel provided by the embodiments of this application has many uses, for example, it can be used in smart bracelets, smart watches, VR (Virtual Reality, virtual reality) and other wearable devices; it can also be used in mobile phones, e-books and e-newspapers, televisions, personal laptops, foldable and rollable OLEDs and other flexible OLED displays and lighting devices, etc., in applications After the display panel of this embodiment, it can withstand a larger bending angle, which can improve the yield of the device.
  • a display panel and a display device are provided.
  • the total thickness of the finished display panel in the bending area 200 is reduced to prevent display
  • the lamination deformation between the laminates causes the fracture or peeling caused by the stress concentration, so as to solve the problem of poor display of the display panel due to the fracture of the display panel laminate or the peeling between the laminates; bending 200
  • the flexible substrate 800 mainly plays a protective role. In the technical solution of the present application, hollowing out the flexible substrate 800 in this area has no effect on the display effect.
  • the display panel further includes an adhesive layer 400 disposed between the flexible substrate 800 and the pixel array 500.
  • the adhesive layer 400 at the corresponding position of the bending area 200 may be hollowed out completely or partly along the arc direction, and the hollowed part may form a groove 600.
  • the adhesive layer 400 serves to adhere the pixel array 500 and the flexible substrate.
  • the adhesive layer 400 is an optical glue.
  • the adhesive layer 400 at the corresponding position of the bending area 200 is hollowed out in the bending direction completely or partially, so that the display panel is finished in the bending area.
  • the thickness is reduced to prevent stress concentration, thereby solving the problem of poor display in the bending area of the flexible display panel.
  • the adhesive layer 400 mainly serves to bond the flexible substrate and the pixel array 500, where the flexible substrate has been hollowed out. In this case, further hollowing out the adhesive layer 400 in this area will not have a negative impact on the display effect, nor will it have a negative impact on the degree of adhesion between layers.
  • the groove 600 is filled with a protective layer 700.
  • the thickness of the protective layer 700 does not exceed the depth of the groove 600.
  • the protective layer 700 is an ultraviolet photosensitive adhesive.
  • one groove 600 may be provided, or a plurality of grooves 600 may be provided in a non-continuous arrangement. In this embodiment, the number of grooves 600 is one.
  • the cross-sectional shape of the groove 600 is one or more of trapezoidal, semi-circular, or rectangular, or other shapes. It should be noted that the cross-sectional shape of the groove 600 is that the flexible substrate 800 is not bent. For the shape in the state, the cross-sectional shape of the groove 600 in this embodiment is rectangular.
  • the width of the cross-section of the groove 600 is not greater than the width of the bending area. In a preferred embodiment, the width of the cross-section of the groove 600 is equal to the width of the bending area 200. The smallest.
  • a thin film packaging layer, a touch layer, a polarizer, and a protective cover plate are stacked on the pixel array 500.
  • the flexible substrate 800 is provided with a back plate and a copper film graphite foam layer (Copper&Graphite&Foam) (not shown) on the side facing away from the pixel array 500.
  • the display panel provided by the embodiments of this application has many uses, for example, it can be used in smart bracelets, smart watches, VR (Virtual Reality, virtual reality) and other wearable devices; it can also be used in mobile phones, e-books and e-newspapers, televisions, personal laptops, foldable and rollable OLEDs and other flexible OLED displays and lighting devices, etc., in applications After the display panel of this embodiment, it can withstand a larger bending angle, which can improve the yield of the device.
  • a display panel and a display device are provided to solve the problem caused by the lack of protection after the flexible substrate 800 is hollowed out.
  • a protective layer 700 is filled in the hollowed area to isolate It can protect the product from external damage; the thickness of the protective layer 700 in the embodiment does not exceed the depth of the hollowed-out area, so the total thickness of the display panel product in the bending area 200 is reduced; the protective layer 700 used in the embodiment of the application UV-sensitive adhesive, due to the characteristics of the material.
  • the stress generated is less than the stress generated by the flexible substrate and the adhesive layer 400, so as to prevent the display panel stack from breaking or peeling off between the stacks, thereby causing the display panel to display poorly;
  • the width of the cross-section is not greater than the width of the bending area 200, so that the performance of the non-bending area of the display panel is not affected.
  • the present application also provides a display device, including the display panel in any of the above embodiments.
  • the display panel in the embodiment of the present application may also include any other necessary structures as required. Not limited.

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  • General Physics & Mathematics (AREA)
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Abstract

一种显示面板及显示装置，显示装置包括像素阵列（500）、柔性衬底（800），柔性衬底（800）包括设置于像素阵列（500）底部的第一区域（100）、第二区域（300）以及位于第一区域（100）与第二区域（300）之间的弯折区（200）；其中，柔性衬底（800）的弯折区（200）沿弯折方向全部或部分挖空。

Description

显示面板及显示装置 技术领域
本申请涉及显示技术领域，具体涉及一种显示面板及显示装置。
 背景技术
在现代通信行业中，手机、电视、平板、笔记本、数码相机等产品市场需求越来越大，各种显示设备也正向曲面显示、多面显示发展。
在柔性显示面板制造中，需用运用CG （cover glass，盖板玻璃）贴合工艺，传统的贴合工艺正在往曲面贴合工艺方向发展，然而现有显示面板在曲面贴合过程中，参照图1和图2所示意的，其拐角位置包括柔性衬底800、粘合层400和像素阵列500等在内的叠层较厚，弯折部位叠层之间贴合形变导致应力集中，易使得显示面板叠层断裂或叠层之间剥离，从而引起显示面板显示不良的问题。
 技术问题
本申请实施例提供一种显示面板及显示装置，旨在解决显示面板弯折过程中叠层之间贴合形变导致应力集中，易使得显示面板叠层断裂或叠层之间剥离，从而引起显示面板显示不良的问题。
 技术解决方案
本申请提供一种显示面板，包括：
像素阵列；
柔性衬底，该柔性衬底包括设置于所述像素阵列底部的第一区域、第二区域以及位于所述第一区域与所述第二区域之间的弯折区；
柔性衬底的弯折区沿弯折方向全部或部分挖空；
所述显示面板还包括设置于柔性衬底与像素阵列之间的粘合层，所述粘合层上与弯折区对应的区域沿弯折方向全部或部分挖空，
挖空区域内填充有保护层。
在一些实施例中，所述保护层的厚度不超过挖空区域的深度。
本申请还提供一种显示面板，包括：
像素阵列，包括：由上至下依次层叠的薄膜晶体管层、阳极、OLED发光层以及阴极；
柔性衬底，该柔性衬底包括设置于所述像素阵列底部的第一区域、第二区域以及位于所述第一区域与所述第二区域之间的弯折区，柔性衬底可以采用PET（Polyethylene terephthalate，聚对苯二甲酸乙二醇酯）材料；
其中，柔性衬底的弯折区沿弯折方向全部或部分挖空。
在一些实施例中，上述显示面板还包括设置于柔性衬底与像素阵列之间的粘合层，粘合层可以为光学胶（Optically Clear Adhesive，OCA），所述弯折区对应位置的粘合层沿弧度方向全部或沿部分挖空。
在一些实施例中，上述显示面板，还包括挖空区域内填充的保护层。
在一些实施例中，上述显示面板，其保护层的厚度不超过挖空区域的深度。
在一些实施例中，保护层为紫外光敏胶。
在一些实施例中，挖空区域的截面形状为梯形、半圆形或矩形中的一种或多种。
在一些实施例中，挖空区域数量为一个。
在一些实施例中，挖空区域数量为多个且呈非连续排列。
在一些实施例中，挖空区域截面的宽度不大于弯曲区的宽度。
本申请还提供一种显示装置，包括显示面板，该显示面板包括：
像素阵列；
柔性衬底，所述柔性衬底包括设置于所述像素阵列底部的第一区域、第二区域以及位于所述第一区域与所述第二区域之间的弯折区；
所述柔性衬底的弯折区沿弯折方向全部或部分挖空。
在一些实施例中，还包括设置于柔性衬底与像素阵列之间的粘合层，所述粘合层上与弯折区对应的区域沿弯折方向全部或部分挖空。
在一些实施例中，挖空区域内填充有保护层。
在一些实施例中，所述保护层的厚度不超过挖空区域的深度。
在一些实施例中，所述保护层为紫外光敏胶。
在一些实施例中，挖空区域的截面形状为梯形、半圆形、矩形中的一种或几种。
在一些实施例中，挖空区域数量为一个。
在一些实施例中，挖空区域数量为多个且呈非连续排列。
在一些实施例中，挖空区域截面的宽度不大于弯折区的宽度。
 有益效果
本申请实施例中提供的显示面板及显示装置，通过在弯折区对应的柔性衬底部位形成挖空区域，使显示面板成品在弯折区的总厚度减薄，防止显示面板成品弯折过程中叠层之间贴合形变导致应力集中导致的断裂或剥离，从而解决因显示面板叠层断裂或叠层之间剥离，从而引起显示面板显示不良的问题；弯折曲的柔性衬底在主要起保护作用，本申请的技术方案中，将该区域的柔性衬底挖空对显示效果无影响。
在本申请的一个优选方案中，将弯折区对应位置处的粘合层沿弯折方向全部或沿部分挖空，进一步使显示面板成品在弯折区的总厚度减薄，防止应力集中，从而解决柔性显示面板弯折区显示不良的问题，粘合层主要起粘合柔性衬底与像素阵列的作用，在该区域柔性衬底已被挖空的情况下，进一步挖空该区域的粘合层，不会对显示效果带来负面影响，也不会对层间的粘合度带来负面影响。
针对柔性衬底挖空后保护作用缺失导致的问题，本申请实施例中通过在挖空区域中填充一层保护层，起隔离作用，可保护产品不受外部损伤；实施例中保护层厚度不超过挖空区域的深度，因此显示面板成品在弯折区的总厚度减薄；本申请实施例中保护层采用的紫外光敏胶，由于材料的特性，在显示面板弯折情况下，产生的弯折应力小于柔性衬底和粘合层产生的弯折应力，从而避免显示面板叠层断裂或叠层之间剥离，从而引起显示面板显示不良的问题；挖空区域截面的宽度不大于弯曲区的宽度，使显示面板非弯折区的性能不受影响。
 附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域技术人员来讲，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是现有技术中的显示面板在非弯曲状态下的部分结构示意图；
图2是现有技术中的显示面板在弯曲状态下的部分结构示意图；
图3是本发明实施例提供一种显示面板的一个实施例示意图；
图4是本发明实施例提供一种显示面板的另一个实施例示意图；
图5是本发明实施例提供一种显示面板的又一个实施例示意图。
其中附图标记说明：
100-第一区域；200-弯折区；300-第二区域；400-粘合层；500-像素阵列；600-凹槽；700-保护层；800-柔性衬底。
 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。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，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或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
现有柔性显示面板制作中，在曲面贴合过程中，其拐角位置包括柔性衬底、光学胶和像素阵列等在内的叠层较厚，叠层之间贴合形变导致应力集中，易使得显示面板叠层断裂或叠层之间剥离，从而引起显示面板显示不良的问题。本实施例通过提供一种显示面板及显示装置，旨在解决以上问题。
如图3所示，图3为本申请实施例中第一种显示面板的结构示意图，其中，显示面板包括：像素阵列500和柔性衬底800。
本处，像素阵列500包括由上至下依次层叠的薄膜晶体管层、阳极、OLED发光层以及阴极(未图示)。
柔性衬底800包括设置于像素阵列500底部的第一区域100、第二区域300以及位于第一区域100与第二区域300之间的弯折区200。
具体的，柔性衬底材料为PET（Polyethylene terephthalate，聚对苯二甲酸乙二醇酯），也可以为聚酰亚胺。
其中，在弯折区内，柔性衬底800的弯折区沿弧度方向全部或部分挖空，挖空部位形成凹槽600。
具体的，凹槽600可以设置一个，也可以设置多个且呈非连续排列，在本实施例中，凹槽600的数量为一个。
具体的，凹槽600的截面形状为梯形、半圆形或矩形中的一种，也可以是其他形状，需要说明的是，凹槽600的截面形状为柔性衬底800未弯折状态下的形状，本实施例中凹槽600的截面形状为矩形。
具体的，弯折区200的弯折角度为90°。
具体的，凹槽600截面的宽度不大于弯曲区的宽度，在一个优选实施例中，凹槽600截面的宽度等于弯曲区200的宽度，此时弯折区200的叠层之间贴合形变最小。
具体的，像素阵列500上方层叠设置有薄膜封装层、触控层、偏光片以及保护盖板（未图示）。在一个优选实施例中，柔性衬底800背向像素阵列500一侧设置有背板以及铜膜石墨泡绵层(Copper&Graphite&Foam)（未图示）。
本申请实施例提供的显示面板有多种用途，例如可用在智能手环、智能手表、VR(Virtual Reality，虚拟现实)等可穿戴设备上；也可以用在移动电话机、电子书和电子报纸、电视机、个人便携电脑、可折叠以及可卷曲OLED等柔性OLED显示及照明设备等，在应用了本实施例的显示面板后，可以承受更大的弯折角度，可提高设备的良品率。
本申请实施例中通过提供一种显示面板及显示装置，通过在弯折区200对应的柔性衬底800部位形成挖空区域，使显示面板成品在弯折区200的总厚度减薄，防止显示面板成品弯折过程中叠层之间贴合形变导致应力集中导致的断裂或剥离，从而解决因显示面板叠层断裂或叠层之间剥离，从而引起显示面板显示不良的问题；弯折曲200的柔性衬底800在主要起保护作用，本申请的技术方案中，将该区域的柔性衬底800挖空对显示效果无影响。
如图4所示，在上述实施例的基础上，在本申请的另一具体实施例中，显示面板还包括设置于柔性衬底800与像素阵列500之间的粘合层400，粘合层400可以为光学胶，所述弯折区200对应位置的粘合层400沿弧度方向全部或沿部分挖空，挖空部位形成凹槽600。
在本实施例中，粘合层400起到粘贴像素阵列500与柔性衬底的作用。
在一个优选实施例中所述粘合层400为光学胶。
本申请实施例中通过提供一种显示面板及显示装置，将弯折区200对应位置处的粘合层400沿弯折方向全部或沿部分挖空，进一步使显示面板成品在弯折区的总厚度减薄，防止应力集中，从而解决柔性显示面板弯折区显示不良的问题，粘合层400主要起粘合柔性衬底与像素阵列500的作用，在该区域柔性衬底已被挖空的情况下，进一步挖空该区域的粘合层400，不会对显示效果带来负面影响，也不会对层间的粘合度带来负面影响。
如图5所示，在上述实施例的基础上，在本申请的又一个具体实施例中，其中，凹槽600内填充有保护层700。
在一个优选实施例中，保护层700的厚度不超过凹槽600的深度。
在一个优选实施例中，保护层700为紫外光敏胶。
具体的，凹槽600可以设置一个，也可以设置多个且呈非连续排列，在本实施例中，凹槽600的数量为一个。
具体的，凹槽600的截面形状为梯形、半圆形或矩形中的一种或几种，也可以是其他形状，需要说明的是，凹槽600的截面形状为柔性衬底800未弯折状态下的形状，本实施例中凹槽600的截面形状为矩形。
具体的，凹槽600截面的宽度不大于弯曲区的宽度，在一个优选实施例中，凹槽600截面的宽度等于弯曲区200的宽度，此时弯折区200的叠层之间贴合形变最小。
具体的，像素阵列500上方层叠设置有薄膜封装层、触控层、偏光片以及保护盖板（未图示）。在一个优选实施例中，柔性衬底800背向像素阵列500一侧设置有背板以及铜膜石墨泡绵层(Copper&Graphite&Foam)（未图示）。
本申请实施例提供的显示面板有多种用途，例如可用在智能手环、智能手表、VR(Virtual Reality，虚拟现实)等可穿戴设备上；也可以用在移动电话机、电子书和电子报纸、电视机、个人便携电脑、可折叠以及可卷曲OLED等柔性OLED显示及照明设备等，在应用了本实施例的显示面板后，可以承受更大的弯折角度，可提高设备的良品率。
本申请实施例中通过提供一种显示面板及显示装置，针对柔性衬底800挖空后保护作用缺失导致的问题，本申请实施例中通过在挖空区域中填充一层保护层700，起隔离作用，可保护产品不受外部损伤；实施例中保护层700厚度不超过挖空区域的深度，因此显示面板成品在弯折区200的总厚度减薄；本申请实施例中保护层700采用的紫外光敏胶，由于材料的特性。在显示面板弯折情况下，产生的应力小于柔性衬底和粘合层400产生的应力，从而避免显示面板叠层断裂或叠层之间剥离，从而引起显示面板显示不良的问题；挖空区域截面的宽度不大于弯曲区200的宽度，使显示面板非弯折区的性能不受影响。
本申请还提供了一种显示装置，包括上述任一实施例中的显示面板。
需要说明的是，上述显示面板实施例中仅描述了上述结构，可以理解的是，除了上述结构之外，本申请实施例显示面板中，还可以根据需要包括任何其他的必要结构，具体此处不作限定。
以上对本申请实施例所提供的一种显示面板及显示装置进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (20)

  1. 一种显示面板，其中，包括：
    像素阵列；
    柔性衬底，所述柔性衬底包括设置于所述像素阵列底部的第一区域、第二区域以及位于所述第一区域与所述第二区域之间的弯折区；
    所述柔性衬底的弯折区沿弯折方向全部或部分挖空；
    所述显示面板还包括设置于柔性衬底与像素阵列之间的粘合层，所述粘合层上与弯折区对应的区域沿弯折方向全部或部分挖空，
    挖空区域内填充有保护层。
  2. 根据权利要求1所述的显示面板，其中，所述保护层的厚度不超过挖空区域的深度。
  3. 一种显示面板，其中，包括：
    像素阵列；
    柔性衬底，所述柔性衬底包括设置于所述像素阵列底部的第一区域、第二区域以及位于所述第一区域与所述第二区域之间的弯折区；
    所述柔性衬底的弯折区沿弯折方向全部或部分挖空。
  4. 根据权利要求3所述的显示面板，其中，还包括设置于柔性衬底与像素阵列之间的粘合层，所述粘合层上与弯折区对应的区域沿弯折方向全部或部分挖空。
  5. 根据权利要求3所述的显示面板，其中，挖空区域内填充有保护层。
  6. 根据权利要求5所述的显示面板，其中，所述保护层的厚度不超过挖空区域的深度。
  7. 根据权利要求5所述的显示面板，其中，所述保护层为紫外光敏胶。
  8. 根据权利要求3所述的显示面板，其中，挖空区域的截面形状为梯形、半圆形、矩形中的一种或几种。
  9. 根据权利要求3所述的显示面板，其中，挖空区域数量为一个。
  10. 根据权利要求3所述的显示面板，其中，挖空区域数量为多个且呈非连续排列。
  11. 根据权利要求3所述的显示面板，其中，挖空区域截面的宽度不大于弯折区的宽度。
  12. 一种显示装置，其中，包括显示面板，所述显示面板包括：
    像素阵列；
    柔性衬底，所述柔性衬底包括设置于所述像素阵列底部的第一区域、第二区域以及位于所述第一区域与所述第二区域之间的弯折区；
    所述柔性衬底的弯折区沿弯折方向全部或部分挖空。
  13. 根据权利要求12所述的显示装置，其中，还包括设置于柔性衬底与像素阵列之间的粘合层，所述粘合层上与弯折区对应的区域沿弯折方向全部或部分挖空。
  14. 根据权利要求12所述的显示装置，其中，挖空区域内填充有保护层。
  15. 根据权利要求14所述的显示装置，其中，所述保护层的厚度不超过挖空区域的深度。
  16. 根据权利要求14所述的显示装置，其中，所述保护层为紫外光敏胶。
  17. 根据权利要求12所述的显示装置，其中，挖空区域的截面形状为梯形、半圆形、矩形中的一种或几种。
  18. 根据权利要求12所述的显示装置，其中，挖空区域数量为一个。
  19. 根据权利要求12所述的显示装置，其中，挖空区域数量为多个且呈非连续排列。
  20. 根据权利要求12所述的显示装置，其中，挖空区域截面的宽度不大于弯折区的宽度。
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CN112017546B (zh) * 2020-09-21 2022-08-23 京东方科技集团股份有限公司 一种显示面板及显示装置
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