WO2018054118A1 - 柔性显示面板及其制造方法以及柔性显示装置 - Google Patents

柔性显示面板及其制造方法以及柔性显示装置 Download PDF

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Publication number
WO2018054118A1
WO2018054118A1 PCT/CN2017/090531 CN2017090531W WO2018054118A1 WO 2018054118 A1 WO2018054118 A1 WO 2018054118A1 CN 2017090531 W CN2017090531 W CN 2017090531W WO 2018054118 A1 WO2018054118 A1 WO 2018054118A1
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Prior art keywords
display panel
flexible display
layer
bonding portion
adhesive
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PCT/CN2017/090531
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English (en)
French (fr)
Inventor
李云飞
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京东方科技集团股份有限公司
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Priority to US15/737,216 priority Critical patent/US10505130B2/en
Publication of WO2018054118A1 publication Critical patent/WO2018054118A1/zh

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
    • H10K77/10—Substrates, e.g. flexible substrates
    • H10K77/111—Flexible substrates
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04102—Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • 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
    • H10K59/40—OLEDs integrated with touch screens
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present disclosure relates to the field of display technology. More specifically, it relates to a flexible display panel, a method of manufacturing the same, and a flexible display device.
  • the flexible display device With the continuous development of display technology, the emergence of flexible display devices has met the demand for display devices that can be bent. Compared with the conventional rigid display device, the flexible display device has the advantages of being thin, flexible, and mechanically good.
  • the laminate of the flexible display device is prone to peeling during the bending process, the display device is damaged.
  • the embodiments of the present disclosure provide a flexible display panel, a flexible display device, and a manufacturing method of the flexible display panel, which can solve the problem of cracking which is easy to occur when the display panel is bent in the prior art.
  • a first aspect of the present disclosure provides a flexible display panel.
  • the flexible display panel includes: at least two functional layers stacked on each other and an adhesive layer disposed between the functional layers, the flexible display panel having a bending axis parallel to a surface of the flexible display panel, wherein
  • the adhesive layer includes a first bonding portion on one side of the bending axis and a second bonding portion on the other side of the bending axis, wherein
  • the orientation of the cross-sectional shape of the first bonding portion and the second bonding portion in a plane perpendicular to the bending axis with respect to the vertical section of the display panel passing through the bending axis is set to:
  • the bending stress of the flexible display panel when bent along the bending axis is reduced.
  • the first bonding portion includes a plurality of spaced apart adhesives
  • the second adhesive includes a plurality of spaced apart adhesives
  • the first bonding portion and the The extending direction of each of the second bonding portions is parallel to each other.
  • the direction of extension of the bond is parallel to the direction of extension of the bending axis.
  • each of the first bonding portion and the second bonding portion is closer to the vertical section of the flexible display panel than the top end thereof to be suitable for downward direction Bending direction.
  • the top end of each of the first bonding portion and the second bonding portion is closer to the vertical cross section of the flexible display panel than the bottom end thereof to fit In the upward direction of the bend.
  • a distance from a top end of each of the first bonding portion and the second bonding portion to the vertical cross section of the flexible display panel is equal to a bottom end thereof to the The distance of the vertical section of the flexible display panel.
  • the at least two functional layers include a display layer and a touch layer located above the display layer.
  • the projection of the adhesive layer on the display layer does not overlap the pixel area of the display layer.
  • the at least two functional layers further include:
  • An upper protective layer disposed over the touch layer
  • the adhesive layer comprises:
  • a first adhesive layer disposed between the display layer and the touch layer
  • a third adhesive layer disposed between the touch layer and the upper protective layer.
  • the lower protective layer includes a lower protective film
  • the display layer includes: a flexible substrate disposed over the lower protective film, a substrate disposed on the flexible substrate, a light emitting layer disposed on the substrate, and a package disposed on the light emitting layer Floor;
  • the touch layer includes: a touch panel sensor disposed on the encapsulation layer, and a polarizing plate disposed on the touch panel sensor;
  • the upper protective layer includes an upper protective film.
  • the first adhesive layer, the second adhesive layer, and the third adhesive layer extend in parallel with each other.
  • Another object of the present disclosure is to provide a method of manufacturing a flexible display panel.
  • a second aspect of the present disclosure provides a method of fabricating a flexible display panel.
  • the manufacturing method of the flexible display panel includes: forming at least two layer functional layers;
  • the at least two layer functional layers are bonded by the adhesive layer, wherein forming the adhesive layer comprises forming the adhesive layer to include a side of a curved axis that is parallel to a surface of the flexible display panel a first bonding portion and a second bonding portion on the other side of the bending axis, wherein
  • the orientation of the cross-sectional shape of the first bonding portion and the second bonding portion in a plane perpendicular to the bending axis with respect to the vertical section of the flexible display panel passing through the bending axis is set to : reducing bending stress of the flexible display panel when bent along the bending axis.
  • the first bonding portion includes a plurality of spaced apart adhesives
  • the second adhesive includes a plurality of spaced apart adhesives
  • the first bonding portion and the The extending direction of each of the second bonding portions is parallel to each other.
  • the direction of extension of the bond is parallel to the direction of extension of the bending axis.
  • forming the adhesive layer package is formed using at least one of the following methods: embossing and printing.
  • a third aspect of the present disclosure provides a flexible display device.
  • Flexible display device A flexible display panel as described above is included.
  • An embodiment of the present disclosure provides a flexible display panel, a flexible display device, and a method of manufacturing a flexible display panel, by configuring an adhesive layer of a flexible display panel having a bending axis parallel to a surface of the flexible display panel to be included a first bonding portion on one side of the bending axis and a second bonding portion on the other side of the bending axis, wherein the first bonding portion and the second bonding portion are perpendicular to the bending axis.
  • the orientation of the cross-sectional shape in the plane relative to the vertical section of the flexible display panel passing through the bending axis is set to reduce the bending stress of the flexible display panel when bent along the bending axis, and can be released in The stress between the functional layers when bent, thereby improving the bending resistance of the flexible display panel and improving the performance of the flexible display panel.
  • FIG. 1 is a schematic view of a flexible display panel in accordance with an embodiment of the present disclosure
  • FIG. 2(a) is a schematic illustration of a flexible display panel in accordance with an embodiment of the present disclosure
  • FIG. 2(b) is a schematic view showing the flexible display panel of FIG. 2(a) when it is bent downward;
  • 3(a) is a schematic illustration of a flexible display panel in accordance with an embodiment of the present disclosure
  • Figure 3 (b) is a schematic view showing the flexible display panel of Figure 3 (a) when it is bent downward;
  • FIG. 4 is a schematic diagram of a flexible display panel in accordance with an embodiment of the present disclosure.
  • FIG. 5 is a schematic illustration of a flexible display panel in accordance with an embodiment of the present disclosure.
  • FIG. 6 is a schematic view of a flexible display substrate in accordance with an embodiment of the present disclosure.
  • FIG. 7(a) is a schematic illustration of projection of an adhesive layer of a flexible display panel on a display layer in accordance with an embodiment of the present disclosure
  • FIG. 7(b) is a schematic view showing projection of an adhesive layer of a flexible display panel on a display layer according to an embodiment of the present disclosure
  • FIG. 8 is a flow chart showing a method of manufacturing a flexible display panel according to an embodiment of the present disclosure.
  • the terms “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom” and The derivative should refer to the public text.
  • the terms “overlay”, “on top of”, “positioned on” or “positioned on top of” mean that a first element, such as a first structure, exists in a second element, such as a second structure. Above, wherein an intermediate element such as an interface structure may exist between the first element and the second element.
  • the term “contacting” means connecting a first element such as a first structure and a second element such as a second structure, with or without other elements at the interface of the two elements.
  • Embodiments of the present disclosure provide a flexible display panel including at least two functional layers stacked on each other and an adhesive layer disposed between the at least two functional layers, the display panel having a parallel to the display panel The bending axis of the surface.
  • the adhesive layer includes a first adhesive portion on one side of the curved shaft and a second adhesive portion on the other side of the curved shaft.
  • the orientation of the cross-sectional shape of the first bonding portion and the second bonding portion in a plane perpendicular to the bending axis with respect to the vertical cross-section of the flexible display panel passing through the bending axis is set to: reduce the bending of the flexible display panel along the edge Bending stress when the shaft is bent.
  • FIG. 1 is a schematic diagram of a flexible display panel in accordance with an embodiment of the present disclosure.
  • Figure 1 is exemplified by the structure of two functional layers and an adhesive layer disposed between two functional layers.
  • the flexible display panel includes a functional layer 1 and a functional layer 2 and an adhesive layer 3 disposed between the functional layer 1 and the functional layer 2.
  • the display panel has a bending axis AA parallel to the surface of the display panel, and the adhesive layer 3 includes a first bonding portion 31 on one side of the bending axis AA and a second bonding portion 32 on the other side of the bending axis AA.
  • the orientation of the cross-sectional shape of the first bonding portion 31 and the second bonding portion 32 in a plane perpendicular to the bending axis AA with respect to the vertical section of the display panel passing through the bending axis AA is set to: reduce the display panel at the edge The bending stress when the bending axis AA is bent.
  • the first bond portion may include a plurality of spaced apart bonds
  • the second bond portion may also include a plurality of spaced apart bonds.
  • the extending direction of each of the first bonding portion and the second bonding portion may be parallel to each other or may not be parallel to each other.
  • the extending direction of each of the adhesives may be parallel to the extending direction of the bending axis or may not be parallel to the extending direction of the bending axis.
  • the extending direction of each of the first bonding portion and the second bonding portion is parallel to each other and the extending direction of the bonding object is parallel to the extending direction of the bending axis as an example.
  • FIG. 2(a) is a schematic diagram of a flexible display panel in accordance with an embodiment of the present disclosure.
  • a broken line BB in Fig. 2(a) indicates a vertical section of the flexible display panel passing through the bending axis AA, and the direction of the arrow indicates the bending direction of the display panel.
  • the bending direction is a downward bending direction
  • the extending direction of the bending axis is perpendicular to the paper surface.
  • the "downward bending direction” means a direction perpendicular to the display panel from the display side of the display panel toward the back side of the display panel when the flexible display panel is not bent.
  • the "upward bending direction” means a direction perpendicular to the display side of the display panel from the back side of the display panel toward the display side of the display panel when the flexible display panel is not bent.
  • the adhesives in the first bonding portion and the second bonding portion are respectively disposed such that the bottom end thereof is closer to the vertical section of the flexible display panel passing the bending axis than the top end thereof to release the functional layer 1 when the bending occurs. The stress generated between the functional layer 2 and the functional layer 2.
  • Fig. 2(b) is a schematic view showing the flexible display panel of Fig. 2(a) bent downward. Since the bottom end of each of the first bonding portion 31 and the second bonding portion 32 of the flexible display panel of FIG. 2(a) is closer to the vertical section of the flexible display panel than the top end thereof to be suitable for downward The bending direction of the first bonding portion and the second bonding portion is deformed when the downward bending occurs as shown in FIG. 2(b), thereby releasing the functional layer 1 and the functional layer 2 The stress generated between.
  • the number of bonds is not limited to the number shown in the drawing.
  • the thickness of the different layers is merely exemplary and is not intended to be limiting.
  • FIG. 3(a) is a schematic diagram of a flexible display panel in accordance with an embodiment of the present disclosure.
  • a broken line BB in Fig. 3(a) indicates a vertical section of the flexible display panel defined by the bending axis AA, and the direction of the arrow indicates the bending direction of the display panel.
  • the bending direction is the upward bending direction
  • the extending direction of the bending axis is perpendicular to the paper surface.
  • the adhesives in the first bonding portion and the second bonding portion are respectively disposed such that their tips are closer to the vertical section of the display panel passing through the bending axis than the bottom end thereof to release the functional layer 1 at the time of bending The stress generated between the functional layers 2.
  • Fig. 3(b) is a schematic view showing the flexible display panel of Fig. 3(a) when it is bent upward. Since the top end of each of the first bonding portion 31 and the second bonding portion 32 of the flexible display panel of FIG. 3(a) is closer to the vertical section of the display panel than the bottom end thereof to be suitable for upward bending In the direction, when the upward bending occurs as shown in FIG. 3(b), the bond between the first bonding portion and the second bonding portion is deformed, thereby releasing the generation between the functional layer 1 and the functional layer 2. Stress.
  • BB in Fig. 4 represents a vertical section of the display panel defined by the bending axis (see Fig. 1). As shown in FIG. 4, the distance from the tip end of each of the first bonding portion 31 and the second bonding portion 32 to the vertical section of the display panel passing through the bending axis is equal to the distance from the bottom end thereof to the vertical section. To fit the upward or downward bending direction.
  • the flexible display panel shown in Fig. 4 can be used for both the downward bending direction and the upward bending direction. When the downward or upward bending occurs, the bonds of the first bonding portion and the second bonding portion are deformed, thereby releasing the stress generated between the functional layer 1 and the functional layer 2.
  • the functional layer 1 and the functional layer 2 may be a display layer and a touch layer located above the display layer, respectively. However, other functional layers can also be provided as needed.
  • FIG. 5 is a schematic diagram of a flexible display panel in accordance with an embodiment of the present disclosure.
  • FIG. 5 is exemplified by a flexible display panel for a downward bending direction.
  • at least two functional layers of the flexible display panel include: a display layer 200, a touch layer 100 on the display layer 200, a protective layer 400 disposed on the touch layer 100, and a display layer.
  • the adhesive layer of the flexible display panel includes: a first adhesive layer 301 disposed between the display layer 200 and the touch layer 100, and a second adhesive layer 302 disposed between the display layer 200 and the lower protective layer 500, And a third adhesive layer 303 disposed between the touch layer 100 and the upper protective layer 400.
  • FIG. 6 is a schematic illustration of a flexible display substrate in accordance with an embodiment of the present disclosure.
  • Fig. 6 is exemplified by a flexible display panel for a downward bending direction.
  • the lower protective layer may include a lower protective film 5001, and the lower protective film may serve to support and protect.
  • the display layer may include a flexible substrate 2001 disposed over the lower protective film 5001, a substrate 2002 disposed on the flexible substrate 2001, and an organic light-emitting layer 2003 (OLED) disposed on the substrate 2002, disposed on the organic light-emitting layer 2003 Encapsulation layer 2004.
  • OLED organic light-emitting layer
  • the touch layer may include a touch panel panel (TSP) sensor 1001 disposed on the package layer 2004, and a polarizing plate 1002 disposed on the touch panel sensor (for example, a circular polarizer is used for improving contrast). (circular-polarizing filter, C-POL)).
  • TSP touch panel panel
  • polarizing plate 1002 disposed on the touch panel sensor (for example, a circular polarizer is used for improving contrast). (circular-polarizing filter, C-POL)).
  • the flexible substrate 2001 may include polyimide (PI).
  • the substrate 2002 may include Low Temperature Poly-Silicon (LTPS).
  • the light emitting layer 2003 may include an Organic Electroluminescence Display (OLED).
  • the encapsulation layer 2004 may include a Thin Film Encapsulation (TFE) layer.
  • Embodiments of the present disclosure do not limit the material of the adhesive.
  • the material of the adhesive layer may be a light-transmitting adhesive.
  • the adhesive layer can also be arranged to avoid the pixel area of the display layer. That is, the adhesive layer can be set such that its projection on the display layer does not overlap with the pixel area of the display layer.
  • FIG. 7(a) is a schematic diagram of projection of an adhesive layer of a flexible display panel on a display layer in accordance with an embodiment of the present disclosure.
  • the display layer of the flexible display panel includes a pixel array composed of a plurality of pixel regions RP.
  • the adhesive of the adhesive layer 3 may extend along the row direction of the pixel array, and the projection on the display layer does not overlap with the pixel region of the display layer.
  • the respective adhesives in the adhesive layer 3 are spaced apart from each other, and the respective extending directions of the respective adhesives are parallel to the extending direction of the bending axis AA.
  • the projection of the adhesive layer 3 on the display layer does not overlap with the pixel area of the display layer.
  • the display layer of the flexible display panel includes a pixel array composed of a plurality of pixel regions RP.
  • the bond of the adhesive layer 3 may extend along the column direction of the pixel array, and the projection on the display layer does not overlap with the pixel area of the display layer.
  • the respective adhesives in the adhesive layer 3 are spaced apart from each other, and the respective extending directions of the respective adhesives are parallel to the extending direction of the bending axis AA.
  • the projection of the adhesive layer 3 on the display layer does not overlap with the pixel area of the display layer.
  • Embodiments of the present disclosure also provide a method of fabricating a flexible display panel.
  • FIG. 8 is a flow chart showing a method of manufacturing a flexible display panel according to an embodiment of the present disclosure. As shown in FIG. 8, the manufacturing method of the flexible display panel includes:
  • Forming an adhesive layer includes forming the adhesive layer to include a first adhesive portion on a side of a curved axis parallel to a surface of the flexible display panel and a second adhesive portion on the other side of the curved shaft, wherein The orientation of the cross-sectional shape of the bonding portion and the second bonding portion in a plane perpendicular to the bending axis with respect to the vertical section of the flexible display panel passing through the bending axis is set to reduce bending of the display panel when bent along the bending axis stress.
  • the first bond portion may include a plurality of spaced apart bonds
  • the second bond portion may also include a plurality of spaced apart bonds.
  • the extending direction of each of the first bonding portion and the second bonding portion may be parallel to each other or may not be parallel to each other.
  • the extending direction of each of the adhesives may be parallel to the extending direction of the bending axis or may not be parallel to the extending direction of the bending axis.
  • forming the adhesive layer package is formed using at least one of the following methods: embossing and printing.
  • Embodiments of the present disclosure provide a technical solution for improving the bending resistance of a display panel and a display device.
  • the adhesive layer of the display panel having the bending axis parallel to the surface of the display panel is configured to include a first bonding portion on one side of the bending axis and a second bonding portion on the other side of the bending axis, wherein
  • the orientation of the cross-sectional shape of a bonding portion and the second bonding portion in a plane perpendicular to the bending axis with respect to the vertical cross-section of the display panel defined by the bending axis is set to reduce the display panel when bent along the bending axis Bending stress, capable of releasing the interaction between functional layers during bending Force, thereby improving the bending resistance of the display panel and improving the performance of the display panel.
  • the flexible display device in this embodiment may be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, a navigator, and the like.

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Abstract

一种柔性显示面板及其制造方法以及柔性显示装置。柔性显示面板包括：彼此层叠的至少两个功能层(1,2)以及设置在至少两个功能层(1,2)之间的粘合层(3)，其中柔性显示面板具有平行于柔性显示面板表面的弯曲轴(AA)，粘合层(3)包括位于弯曲轴(AA)一侧的第一粘合部(31)和位于弯曲轴(AA)另一侧的第二粘合部(32)，第一粘合部(31)和第二粘合部(32)在垂直于弯曲轴(AA)的平面中的截面形状相对于通过弯曲轴(AA)的柔性显示面板的垂直截面的取向被设定为：减少柔性显示面板在沿弯曲轴(AA)弯曲时的弯曲应力。

Description

柔性显示面板及其制造方法以及柔性显示装置
相关申请的交叉引用
本申请要求于2016年09月26日递交的中国专利申请第201610847294.0号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。
技术领域
本公开文本涉及显示技术领域。更具体地，涉及一种柔性显示面板及其制造方法以及柔性显示装置。
背景技术
随着显示技术的不断发展，柔性显示装置的出现满足了人们对能够弯曲的显示装置的需求。与传统的刚性显示装置对比，柔性显示装置具有轻薄、可弯曲、机械性好等优点。
然而，由于柔性显示装置的叠层在弯折过程中容易出现劈裂(peeling)，从而损坏了显示装置。
发明内容
本公开文本的实施例提供了一种柔性显示面板、柔性显示装置以及柔性显示面板的制造方法，能够解决现有技术中的显示面板弯曲时容易出现的劈裂问题。
本公开文本的一个目的在于提供一种柔性显示面板。
本公开文本的第一方面提供了一种柔性显示面板。所述柔性显示面板包括：彼此层叠的至少两个功能层以及设置在所述功能层之间的粘合层，所述柔性显示面板具有平行于所述柔性显示面板的表面的弯曲轴，其中，
所述粘合层包括位于所述弯曲轴一侧的第一粘合部和位于所述弯曲轴另一侧的第二粘合部，其中，
所述第一粘合部和所述第二粘合部在垂直于所述弯曲轴的平面中的截面形状相对于通过所述弯曲轴的所述显示面板的垂直截面的取向被设定为：减少所述柔性显示面板在沿所述弯曲轴弯曲时的弯曲应力。
在一个实施例中，所述第一粘合部包括间隔开的多个粘合物，所述第二粘合物包括间隔开的多个粘合物，所述第一粘合部和所述第二粘合部中的每一个粘合物的延伸方向彼此平行。
在一个实施例中，所述粘合物的延伸方向平行于所述弯曲轴的延伸方向。
在一个实施例中，在第一粘合部和第二粘合部中的每一个粘合物的底端比其顶端更靠近所述柔性显示面板的所述垂直截面，以适合于向下的弯曲方向。
在一个实施例中，在所述第一粘合部和所述第二粘合部中的每一个粘合物的顶端比其底端更靠近所述柔性显示面板的所述垂直截面，以适合于向上的弯曲方向。
在一个实施例中，所述第一粘合部和所述第二粘合部中的每一个粘合物的顶端到所述柔性显示面板的所述垂直截面的距离等于其底端到所述柔性显示面板的所述垂直截面的距离。
在一个实施例中，所述至少两个功能层包括：显示层和位于所述显示层之上的触控层。
在一个实施例中，所述粘合层在所述显示层上的投影不与所述显示层的像素区重叠。
在一个实施例中，所述至少两个功能层还包括：
设置在所述触控层之上的上保护层；以及
设置在所述显示层之下的下保护层，
其中，所述粘合层包括：
设置在所述显示层和所述触控层之间的第一粘合层
设置在所述显示层和所述下保护层之间的第二粘合层；以及
设置在所述触控层和所述上保护层之间的第三粘合层。
在一个实施例中，所述下保护层包括下保护膜；
所述显示层包括：设置在所述下保护膜之上的柔性基板，设置在所述柔性基板上的衬底，设置在所述衬底上的发光层，设置在所述发光层上的封装层；
所述触控层包括：设置在所述封装层之上的触控面板传感器，设置在所述触控面板传感器上的偏振片；
所述上保护层包括上保护膜。
在一个实施例中，所述第一粘合层、所述第二粘合层和所述第三粘合层的延伸方向彼此平行。
本公开文本的另一个目的在于提供一种柔性显示面板的制造方法。
本公开文本的第二方面提供了一种柔性显示面板的制造方法。所述柔性显示面板的制造方法包括：形成至少两个层功能层；
形成粘合层；
通过所述粘合层将所述至少两个层功能层结合，其中，形成所述粘合层包括将所述粘合层形成为包括位于平行于所述柔性显示面板的表面的弯曲轴一侧的第一粘合部和位于所述弯曲轴另一侧的第二粘合部，其中，
所述第一粘合部和所述第二粘合部在垂直于所述弯曲轴的平面中的截面形状相对于通过所述弯曲轴的所述柔性显示面板的垂直截面的取向被设定为：减少所述柔性显示面板在沿所述弯曲轴弯曲时的弯曲应力。
在一个实施例中，所述第一粘合部包括间隔开的多个粘合物，所述第二粘合物包括间隔开的多个粘合物，所述第一粘合部和所述第二粘合部中的每一个粘合物的延伸方向彼此平行。
在一个实施例中，所述粘合物的延伸方向平行于所述弯曲轴的延伸方向。
在一个实施例中，形成所述粘合层包是采用下列方法中的至少一种来形成的：压印和打印。
本公开文本的又一个目的在于提供一种柔性显示装置。
本公开文本的第三方面提供了一种柔性显示装置。所述柔性显示装置 包括如上所述的柔性显示面板。
本公开文本的实施例提供的柔性显示面板、柔性显示装置以及柔性显示面板的制造方法，通过将具有平行于柔性显示面板的表面的弯曲轴的柔性显示面板的粘合层配置为包括位于所述弯曲轴一侧的第一粘合部和位于所述弯曲轴另一侧的第二粘合部，其中，所述第一粘合部和所述第二粘合部在垂直于所述弯曲轴的平面中的截面形状相对于通过所述弯曲轴的所述柔性显示面板的垂直截面的取向被设定为：减少所述柔性显示面板在沿所述弯曲轴弯曲时的弯曲应力，能够释放在弯曲时功能层之间的应力，从而提高了柔性显示面板的耐弯折性，提高柔性显示面板的性能。
附图说明
为了更清楚地说明本公开文本的实施例的技术方案，下面将对实施例的附图进行简要说明，应当知道，以下描述的附图仅仅涉及本公开文本的一些实施例，而非对本公开文本的限制，其中：
图1为根据本公开文本的实施例的柔性显示面板的示意图；
图2(a)为根据本公开文本的实施例的柔性显示面板的示意图；
图2(b)为示出了图2(a)的柔性显示面板向下弯曲时的示意图；
图3(a)为根据本公开文本的实施例的柔性显示面板的示意图；
图3(b)为示出了图3(a)的柔性显示面板向下弯曲时的示意图；
图4为根据本公开文本的实施例的柔性显示面板的示意图；
图5为根据本公开文本的实施例的柔性显示面板的示意图；
图6为根据本公开文本的实施例的柔性显示基板的示意图；
图7(a)为根据本公开文本的实施例的柔性显示面板的粘合层在显示层上的投影的示意图；
图7(b)为根据本公开文本的实施例的柔性显示面板的粘合层在显示层上的投影的示意图；
图8为根据本公开文本的实施例的柔性显示面板的制造方法的流程示意图。
具体实施方式
为了使本公开文本的实施例的目的、技术方案和优点更加清楚，下面将接合附图，对本公开文本的实施例的技术方案进行清楚、完整的描述。显然，所描述的实施例是本公开文本的一部分实施例，而不是全部的实施例。基于所描述的本公开文本的实施例，本领域技术人员在无需创造性劳动的前提下所获得的所有其他实施例，也都属于本公开文本保护的范围。
当介绍本公开文本的元素及其实施例时，除非上下文中另外明确地指出，否则在本文和所附权利要求中所使用的词语的单数形式包括复数，反之亦然。因而，当提及单数时，通常包括相应术语的复数。用语“包含”、“包括”、“含有”和“具有”旨在包括性的并且表示可以存在除所列要素之外的另外的要素。
出于下文表面描述的目的，如其在附图中被标定方向那样，术语“上”、“下”、“左”、“右”“垂直”、“水平”、“顶”、“底”及其派生词应涉及公开文本。术语“上覆”、“在……顶上”、“定位在……上”或者“定位在……顶上”意味着诸如第一结构的第一要素存在于诸如第二结构的第二要素上，其中，在第一要素和第二要素之间可存在诸如界面结构的中间要素。术语“接触”意味着连接诸如第一结构的第一要素和诸如第二结构的第二要素，而在两个要素的界面处可以有或者没有其它要素。
本公开文本的实施例提供了一种柔性显示面板，其包括彼此层叠的至少两个功能层以及设置在该至少两个功能层之间的粘合层，所述显示面板具有平行于显示面板的表面的弯曲轴。该粘合层包括位于弯曲轴一侧的第一粘合部和位于弯曲轴另一侧的第二粘合部。第一粘合部和所述第二粘合部在垂直于弯曲轴的平面中的截面形状相对于通过弯曲轴的柔性显示面板的垂直截面的取向被设定为：减少柔性显示面板在沿弯曲轴弯曲时的弯曲应力。
图1为根据本公开文本的实施例的柔性显示面板的示意图。图1以两个功能层和设置在两个功能层之间的一层粘合层的结构为示例。如图1所 示，柔性显示面板包括功能层1和功能层2以及设置在功能层1和功能层2之间的粘合层3。该显示面板具有平行于显示面板的表面的弯曲轴AA，粘合层3包括位于弯曲轴AA一侧的第一粘合部31和位于弯曲轴AA另一侧的第二粘合部32。该第一粘合部31和第二粘合部32在垂直于弯曲轴AA的平面中的截面形状相对于通过弯曲轴AA的显示面板的垂直截面的取向被设定为：减少显示面板在沿弯曲轴AA弯曲时的弯曲应力。
第一粘合部可以包括间隔开的多个粘合物，第二粘合部也可以包括间隔开的多个粘合物。第一粘合部和第二粘合部中的每一个粘合物的延伸方向可以彼此平行，也可以彼此不平行。各个粘合物的延伸方向可以平行于弯曲轴的延伸方向，也可以不平行于弯曲轴的延伸方向。以下，将以第一粘合部和第二粘合部中的每一个粘合物的延伸方向彼此平行且粘合物的延伸方向平行于弯曲轴的延伸方向为例做示意性说明。
图2(a)为根据本公开文本的实施例的柔性显示面板的示意图。图2(a)中的虚线BB表示通过弯曲轴AA的柔性显示面板的垂直截面，箭头的方向表示显示面板的弯曲方向。如图2(a)所示，在本实施例中，弯曲方向为向下的弯曲方向，弯曲轴的延伸方向与纸面相垂直。这里，“向下的弯曲方向”是指，在柔性显示面板未弯曲时，垂直于显示面板的从显示面板的显示侧朝向显示面板的背侧的方向。同理，“向上的弯曲方向”是指，在柔性显示面板未弯曲时，垂直于显示面板的从显示面板的背侧朝向显示面板的显示侧的方向。此时，将第一粘合部和第二粘合部中的粘合物分别设置为其底端比其顶端更靠近通过弯曲轴的柔性显示面板的垂直截面，以释放发生弯曲时功能层1和功能层2之间产生的应力。
图2(b)为示出了图2(a)的柔性显示面板向下弯曲时的示意图。由于图2(a)的柔性显示面板的第一粘合部31和第二粘合部32中的每一个粘合物的底端比其顶端更靠近柔性显示面板的垂直截面以适合于向下的弯曲方向，当如图2(b)所示发生向下的弯曲时，第一粘合部和第二粘合部的粘合物会发生形变，从而释放了在功能层1和功能层2之间产生的应力。
需要指出，粘合物的数目并非限制于图中所示的数目。此外，不同层的厚度仅仅为示例性的，并非用于限制
图3(a)为根据本公开文本的实施例的柔性显示面板的示意图。图3(a)中的虚线BB表示由弯曲轴AA限定的柔性显示面板的垂直截面，箭头的方向表示显示面板的弯曲方向。如图3(a)所示，在本实施例中，弯曲方向为向上的弯曲方向，弯曲轴的延伸方向与纸面相垂直。此时，将第一粘合部和第二粘合部中的粘合物分别设置为其顶端比其底端更靠近通过弯曲轴的显示面板的垂直截面，以释放在弯曲时功能层1和功能层2之间产生的应力。
图3(b)为示出了图3(a)的柔性显示面板向上弯曲时的示意图。由于图3(a)的柔性显示面板的第一粘合部31和第二粘合部32中的每一个粘合物的顶端比其底端更靠近显示面板的垂直截面以适合于向上的弯曲方向，当如图3(b)所示发生向上的弯曲时，第一粘合部和第二粘合部的粘合物会发生形变，从而释放了在功能层1和功能层2之间产生的应力。
图4为根据本公开文本的实施例的柔性显示面板的示意图。图4中的BB表示由弯曲轴(参见图1)限定的显示面板的垂直截面。如图4所示，第一粘合部31和第二粘合部32中的每一个粘合物的顶端到通过弯曲轴的显示面板的垂直截面的距离等于其底端到该垂直截面的距离，以适合于向上或者向下的弯曲方向。图4所示的柔性显示面板既可以用于向下的弯曲方向，也可以用于向上的弯曲方向。当发生向下或者向上的弯曲时，第一粘合部和第二粘合部的粘合物会发生形变，从而释放了在功能层1和功能层2之间产生的应力。
功能层1和功能层2可以分别为显示层和位于显示层之上的触控层。然而，也可以根据需要设置其它的功能层。
图5为根据本公开文本的实施例的柔性显示面板的示意图。图5以用于向下的弯曲方向的柔性显示面板为示例。如图5所示，柔性显示面板的至少两个功能层包括：显示层200，位于显示层200之上的触控层100，设置在触控层100之上的保护层400，以及设置在显示层200之下的下保护 层500。柔性显示面板的粘合剂层包括：设置在显示层200和触控层100之间的第一粘合层301，设置在显示层200和下保护层500之间的第二粘合层302，以及设置在触控层100和上保护层400之间的第三粘合层303。
图6为根据本公开文本的实施例的柔性显示基板的示意图。图6以用于向下的弯曲方向的柔性显示面板为示例。
如图6所示，下保护层可以包括下保护膜5001，下保护膜可以起到支撑和保护的作用。显示层可以包括：设置在下保护膜5001之上的柔性基板2001，设置在柔性基板2001上的衬底2002，设置在衬底2002上的有机发光层2003(OLED)，设置在有机发光层2003上的封装层2004。
触控层可以包括：设置在封装层2004之上的触控面板(TSP，touch screen panel)传感器1001，设置在触控面板传感器上的偏振片1002(例如，为了提高对比度，采用圆形偏振片(circular-polarizing filter，C-POL))。
柔性基板2001可以包括聚酰亚胺(Polyimide，PI)。衬底2002可以包括低温多晶硅(Low Temperature Poly-Silicon，LTPS)。发光层2003可以包括有机发光层(Organic Electroluminesence Display，OLED)。封装层2004可以包括薄膜封装(Thin Film Encapsulation，TFE)层。
本公开文本的实施例对粘合剂的材料不做限制。例如，粘合层的材可以为透光性较好的粘合剂。为了更好的透光，还可以将粘合层设置为避开显示层的像素区域。即，可以将粘合层设置为其在显示层上的投影不与显示层的像素区域重叠。
图7(a)为根据本公开文本的实施例的柔性显示面板的粘合层在显示层上的投影的示意图。如图7(a)所示，柔性显示面板的显示层包括由多个像素区域RP构成的像素阵列。粘合层3的粘合物可以沿着像素阵列的行方向延伸，并且在显示层上的投影不与显示层的像素区域重叠。粘合层3中的各个粘合物彼此间隔开，且各个粘合物的延伸方向均平行于弯曲轴AA的延伸方向。从图7(a)可以看出，粘合层3在显示层上的投影不与显示层的像素区域重叠。
图7(b)为根据本公开文本的实施例的柔性显示面板的粘合层在显示 层上的投影的示意图。如图7(b)所示，柔性显示面板的显示层包括由多个像素区域RP构成的像素阵列。粘合层3的粘合物可以沿着像素阵列的列方向延伸，并且在显示层上的投影不与显示层的像素区域重叠。粘合层3中的各个粘合物彼此间隔开，且各个粘合物的延伸方向均平行于弯曲轴AA的延伸方向。从图7(b)可以看出，粘合层3在显示层上的投影不与显示层的像素区域重叠。
本公开文本的实施例还提供了一种柔性显示面板的制造方法。
图8为根据本公开文本的实施例的柔性显示面板的制造方法的流程示意图。如图8所示，该柔性显示面板的制造方法的包括：
S1.形成至少两个层功能层。
S2.形成粘合层。形成粘合层包括将粘合层形成为包括位于平行于柔性显示面板的表面的弯曲轴一侧的第一粘合部和位于该弯曲轴另一侧的第二粘合部，其中，第一粘合部和第二粘合部在垂直于弯曲轴的平面中的截面形状相对于通过弯曲轴的柔性显示面板的垂直截面的取向被设定为：减少显示面板在沿弯曲轴弯曲时的弯曲应力。
S3.通过粘合层将所述至少两个层功能层结合。
第一粘合部可以包括间隔开的多个粘合物，第二粘合部也可以包括间隔开的多个粘合物。第一粘合部和第二粘合部中的每一个粘合物的延伸方向可以彼此平行，也可以彼此不平行。各个粘合物的延伸方向可以平行于弯曲轴的延伸方向，也可以不平行于弯曲轴的延伸方向。
在一个实施例中，形成所述粘合层包是采用下列方法中的至少一种来形成的：压印和打印。
本公开文本的实施例提供了提高显示面板和显示装置的耐弯折性的技术方案。通过将具有平行于显示面板的表面的弯曲轴的显示面板的粘合层配置为包括位于弯曲轴一侧的第一粘合部和位于弯曲轴另一侧的第二粘合部，其中，第一粘合部和第二粘合部在垂直于弯曲轴的平面中的截面形状相对于由弯曲轴限定的显示面板的垂直截面的取向被设定为：减少显示面板在沿弯曲轴弯曲时的弯曲应力，能够释放在弯曲时功能层之间的应 力，从而提高了显示面板的耐弯折性，提高显示面板的性能。
本实施例中的柔性显示装置可以为：手机、平板电脑、电视机、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
已经描述了某特定实施例，这些实施例仅通过举例的方式展现，而且不旨在限制本公开文本的范围。事实上，本文所描述的新颖实施例可以以各种其它形式来实施；此外，可在不脱离本公开文本的精神下，做出以本文所描述的实施例的形式的各种省略、替代和改变。所附权利要求以及它们的等价物旨在覆盖落在本公开文本范围和精神内的此类形式或者修改。

Claims (15)

  1. 一种柔性显示面板，包括：彼此层叠的至少两个功能层以及设置在所述至少两个功能层之间的粘合层，其中所述柔性显示面板具有平行于所述柔性显示面板的表面的弯曲轴，其中，
    所述粘合层包括位于所述弯曲轴一侧的第一粘合部和位于所述弯曲轴另一侧的第二粘合部，其中，
    所述第一粘合部和所述第二粘合部在垂直于所述弯曲轴的平面中的截面形状相对于通过所述弯曲轴的所述柔性显示面板的垂直截面的取向被设定为：减少所述柔性显示面板在沿所述弯曲轴弯曲时的弯曲应力。
  2. 根据权利要求1所述的柔性显示面板，其中，所述第一粘合部包括间隔开的多个粘合物，所述第二粘合物包括间隔开的多个粘合物，所述第一粘合部和所述第二粘合部中的每一个粘合物的延伸方向彼此平行。
  3. 根据权利要求2所述的柔性显示面板，其中，所述粘合物的延伸方向平行于所述弯曲轴的延伸方向。
  4. 根据权利要求3所述的柔性显示面板，其中，在所述第一粘合部和所述第二粘合部中的每一个粘合物的底端比其顶端更靠近所述柔性显示面板的所述垂直截面，以适合于向下的弯曲方向。
  5. 根据权利要求3所述的柔性显示面板，其中，在所述第一粘合部和所述第二粘合部中的每一个粘合物的顶端比其底端更靠近所述柔性显示面板的所述垂直截面，以适合于向上的弯曲方向。
  6. 根据权利要求3所述的柔性显示面板，其中，所述第一粘合部和所述第二粘合部中的每一个粘合物的顶端到所述柔性显示面板的所述垂直截面的距离等于其底端到所述柔性显示面板的所述垂直截面的距离，以适合于向上或者向下的弯曲方向。
  7. 根据权利要求1-6中任一项所述的柔性显示面板，其中，所述至少两个功能层包括：显示层和位于所述显示层之上的触控层。
  8. 根据权利要求7所述的柔性显示面板，其中，所述粘合层在所述显示层上的投影不与所述显示层的像素区重叠。
  9. 根据权利要求8所述的柔性显示面板，其中，所述至少两个功能层还包括：
    设置在所述触控层之上的上保护层；以及
    设置在所述显示层之下的下保护层，
    其中，所述粘合层包括：
    设置在所述显示层和所述触控层之间的第一粘合层
    设置在所述显示层和所述下保护层之间的第二粘合层；以及
    设置在所述触控层和所述上保护层之间的第三粘合层。
  10. 根据权利要求9所述的柔性显示面板，其中，所述下保护层包括下保护膜；
    所述显示层包括：设置在所述下保护膜之上的柔性基板，设置在所述柔性基板上的衬底，设置在所述衬底上的发光层，设置在所述发光层上的封装层；
    所述触控层包括：设置在所述封装层之上的触控面板传感器，设置在所述触控面板传感器上的偏振片；
    所述上保护层包括上保护膜。
  11. 根据权利要求9或10所述的柔性显示面板，其中，所述第一粘合层、所述第二粘合层和所述第三粘合层的延伸方向彼此平行。
  12. 一种柔性显示面板的制造方法，包括：形成至少两个层功能层；
    形成粘合层；
    通过所述粘合层将所述至少两个层功能层结合，其中，形成所述粘合层包括将所述粘合层形成为包括位于平行于所述柔性显示面板的表面的弯曲轴一侧的第一粘合部和位于所述弯曲轴另一侧的第二粘合部，其中，
    所述第一粘合部和所述第二粘合部在垂直于所述弯曲轴的平面中的截面形状相对于通过所述弯曲轴的所述柔性显示面板的垂直截面的取向被设定为：减少所述柔性显示面板在沿所述弯曲轴弯曲时的弯曲应力。
  13. 根据权利要求12所述的柔性显示面板的制造方法，其中，所述第一粘合部包括间隔开的多个粘合物，所述第二粘合物包括间隔开的多个粘 合物，所述第一粘合部和所述第二粘合部中的每一个粘合物的延伸方向彼此平行。
  14. 根据权利要求13所述的柔性显示面板的制造方法，其中，所述粘合物的延伸方向平行于所述弯曲轴的延伸方向，
    并且其中，形成所述粘合层包是采用下列方法中的至少一种来形成的：压印和打印。
  15. 一种柔性显示装置，其中，所述柔性显示面板包括根据权利要求1-11中任一项所述的柔性显示面板。
PCT/CN2017/090531 2016-09-26 2017-06-28 柔性显示面板及其制造方法以及柔性显示装置 WO2018054118A1 (zh)

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